具体实施方式

下面结合附图和实施例对本实用新型作进一步的详细说明。可以理解的是，此处所描述的具体实施例仅仅用于解释本实用新型，而非对本实用新型的限定。另外还需要说明的是，为了便于描述，附图中仅示出了与本实用新型相关的部分而非全部结构。

在本实用新型的描述中，除非另有明确的规定和限定，术语“相连”、“连接”、“固定”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本实用新型中的具体含义。

在本实用新型中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。

在本实施例的描述中，术语“上”、“下”、“右”、等方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述和简化操作，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本实用新型的限制。此外，术语“第一”、“第二”仅仅用于在描述上加以区分，并没有特殊的含义。

针对现有技术中，在汽车传动轴总成的装配过程中，一部分传动轴输入端和输出端螺栓连接处扳拧空间狭小，拧紧螺栓的气动工具无法使用。如果使用扳手手动拧紧一个待装配部件的螺栓则需要时间约为30S，存在效率低，劳动强度大的问题，本实施例提供了一种扳手，采用本实施例提供的扳手配合气动扳手打紧一个传动轴螺栓需要的时间约为6S，降低了劳动强度，提高了作业效率。

参照图1所示，本实施提供的扳手包括主动轴100、从动轴200和传动机构300，主动轴100的第一端设置有与气动扳手连接的连接部111，从动轴200与主动轴100平行错位设置，从动轴200的第一端设置有扳手头211；传动机构300的输入端与主动轴100的第二端连接，传动机构300的输出端与从动轴200的第二端连接，传动机构300包括壳体310，壳体310上设置有定位件311，定位件311用于将传动机构300固定于待装配部件上。

本实施例提供的扳手能配合气动扳手一起使用，且能避免扳手与待装配部件发生干涉，保证动力正常输入，完成螺栓的拧紧。设有扳手头211的从动轴200与主动轴100平行错位设置，使扳手头211能错开与待装配部件之间的干涉以套接于待拧紧螺栓头部上，进而使该扳手适用于狭小的安装空间；定位件311将传动机构300固定于待装配部件上，当扳手头211套接于待拧紧螺栓上时，气动扳手与连接部111相连以驱动主动轴100转动，主动轴100通过传动机构300带动从动轴200转动，进而带动扳手头211转动以拧紧螺栓，完成待装配部件的装配，装配效率高，降低工作人员劳动强度。此外，扳手头211不需要重复多次套接螺栓头部，进而有效保护螺栓头部不受损坏。

进一步地，扳手头211和连接部111可以设置于壳体310两侧，工作人员手持主动轴100就能方便的将扳手头211对准待拧紧螺栓，快速完成待装配部件的装配。

于本实施例中，继续参照图1所示，扳手头211为套筒状扳手头。进一步地，扳手头211与从动轴200可以是一体的，也可以是可拆卸连接的，可拆卸连接的方式能使该扳手更换不同规格型号的扳手头211，应用范围更广。进一步地，扳手头211与从动轴200可拆卸的连接方式为现有技术，可以是卡扣连接的方式，也可以是其他的连接方式，在此不再做详细赘述。

进一步地，套筒状的扳手头211的侧壁沿周向可以开设开口，开口可以延伸至扳手头211端部，待拧紧螺栓的头部能穿过开口套接于扳手头211内，使该扳手能应用于更小的安装空间。

于本实施例中，参照图2所示，定位件311与扳手头211位于壳体310的同一侧，定位件311上设有凸起，凸起能与待装配部件匹配连接。具体地，凸起高于扳手头211设置，凸起朝向扳手的一侧设置至少一个定位槽3111与待装配部件上的齿轮啮合。在本实施例中，定位件311定位快速可靠，工作人员首先将定位件311高于扳手头211的部分啮合于待装配部件的齿轮上，此时扳手头211与待拧紧螺栓相对应，朝向待拧紧螺栓移动该扳手，就能直接将扳手头211对准待拧紧螺栓，进而快速完成装配。

进一步地，定位件311可以是固定设置于壳体310上，也可以是可拆卸设置于壳体310上，具体地，定位件311设置有多种规格型号，每个规格的定位件311安装于壳体310上后，每个规格的定位件311上的齿与扳手头211的距离不同，进而使该扳手适用于不同规格的待装配部件。

进一步地，连接部111也可以连接丁字扳手，当气动扳手损坏或没有电量时，可以用丁字扳手与连接部111连接，工作人员通过丁字扳手带动主动轴100转动，主动轴100通过传动机构300带动从动轴200转动，进而带动扳手头211转动以拧紧螺栓，完成待装配部件的装配。进一步地，连接部111还可以连接其他工具以完成待装配部件的装配，在此不再做详细赘述。具体地，参照图3所示，连接部111的端部设有与气动扳手匹配连接的连接槽，连接部111沿径向设有销孔，且销孔贯穿连接槽。本实用新型不以此为限，连接部111还可以连接其他形式的手动扳手工具和电动扳手工具，在此不再做详细赘述。

于本实施例中，继续参照图3所示，传动机构300还包括主动齿轮320和与主动齿轮320啮合的从动齿轮330，主动齿轮320和从动齿轮330均设置于壳体310内，主动轴100的第二端穿设壳体310与主动齿轮320连接，从动轴200的第二端穿设壳体310与从动齿轮330连接。进一步地，主动齿轮320与从动齿轮330之间还可以设置有至少一个中间齿轮，增加主动轴100与从动轴200之间的距离，进而增加扳手头211与主动轴100之间的距离，实现不同工作空间的干涉避让。在本实施例中，主动轴100带动主动齿轮320转动，主动齿轮320通过啮合带动从动齿轮330转动，从动齿轮330带动从动轴200转动，进而带动扳手头211转动以旋拧螺栓，该扳手能保证在狭小的扳拧空间内，利用主动传递给从动的方式实现扭力传递。本实用新型不以此为限，传动机构300还可以是斜齿轮传动机构、人字齿轮传动机构、棘轮传动机构、蜗轮蜗杆传动机构或皮带传动机构等。

具体地，主动齿轮320套设于主动轴100上且通过第一键800与主动轴100连接，主动齿轮320也可以通过其他的方式与主动轴100连接，在此不做详细叙述。进一步地，从动齿轮330套设于从动轴200上且通过第二键900与从动轴200连接，从动齿轮330也可以通过其他的方式与从动轴200连接，在此不做详细叙述。进一步地，从动轴200与从动齿轮330之间的配合优选间隙配合。

进一步地，主动轴100与壳体310转动连接，主动轴100上设置有第一限位件400以限制主动轴100沿轴向运移动。具体地，第一限位件400包括第一卡簧，第一卡簧设置于壳体310内且贴合壳体310的内侧壁，主动轴100包括依次相连且同轴设置的第一轴110、第二轴120和第三轴130，第一轴110的直径大于第二轴120的直径，第二轴120的直径大于第三轴130的直径，第一轴110的端部设置有连接部111，第三轴130上套接主动齿轮320，第二轴120沿周向设置有第一凹槽，第一卡簧卡接于第一凹槽内，第一轴110与第二轴120之间的台阶面贴合壳体310的外侧壁，该台阶面与第一卡簧配合实现了主动轴100的轴向定位。在本实施例中，第二轴120的直径大于第三轴130的直径，方便第一卡簧的安装。进一步地，也可以通过其他的形式限制主动轴100沿轴向移动，在此不再做详细赘述。

进一步地，第二轴120与第三轴130之间的台阶抵靠主动齿轮320，主动齿轮320背向连接部111的一侧与壳体310之间设置有第一垫圈500。具体地，第一垫圈500套设于主动轴100上，第一垫圈500一侧抵靠主动齿轮320，另一侧抵靠壳体310。在本实施例中，第一垫圈500为减磨垫圈，减小主动齿轮320与壳体310之间的摩擦力，有效提高传动机构300的传动效率。具体地，当扳手头211套接在螺栓上后，工作人员旋拧螺栓的过程中会将该扳手压向螺栓，此时，主动齿轮320压向第一垫圈500，进而使第一垫圈500压紧壳体310，通过第一垫圈500，减小主动齿轮320与壳体310之间的摩擦力，提高传动机构300的传动效率。

具体地，壳体310上设置有第一通孔312和第二通孔313，第一通孔312和第二通孔313相对设置，主动轴100的第二端依次穿设第一通孔312和第二通孔313且分别与第一通孔312和第二通孔313转动连接，使主动齿轮320的传动更加稳定。进一步地，主动轴100可以通过轴承分别与第一通孔312和第二通孔313转动连接，也可以通过其他方式分别与第一通孔312和第二通孔313转动连接，在此不再做详细赘述。

进一步地，从动轴200与壳体310转动连接，从动轴200上设置有第二限位件600以限制从动轴200沿轴向移动。具体地，第二限位件600包括第二卡簧，第二卡簧设置于壳体310内且贴合壳体310的内侧壁，从动轴200包括依次相连且同轴设置的第四轴210、第五轴220和第六轴230，第四轴210的直径大于第五轴220的直径，第五轴220的直径大于第六轴230的直径，第四轴210的端部设置有扳手头211，第五轴220上套接从动齿轮330，第六轴230沿周向设置有第二凹槽，第二卡簧卡接于第二凹槽内，第四轴210与第五轴220之间的台阶面贴合壳体310的外侧壁。该台阶面与第二卡簧配合实现了从动轴200的轴向定位。在本实施例中，第五轴220的直径大于第六轴230直径，方便第二卡簧的安装。进一步地，也可以通过其他的形式限制从动轴200沿轴向移动，在此不再做详细赘述。

进一步地，第五轴220与第六轴230之间的台阶抵靠从动齿轮330，主动齿轮320背向扳手头211的一侧与壳体310之间设置有第二垫圈700。具体地，第二垫圈700套设于从动轴200上，第二垫圈700一侧抵靠从动齿轮330，另一侧抵靠壳体310。在本实施例中，第二垫圈700为减磨垫圈，减小从动齿轮330与壳体310之间的摩擦力，有效提高传动机构300的传动效率。具体地，当扳手头211套接在螺栓上后，工作人员旋拧螺栓的过程中会将该扳手压向螺栓，此时，从动齿轮330压向第二垫圈700，进而使第二垫圈700压紧壳体310，通过第二垫圈700，减小从动齿轮330与壳体310之间的摩擦力，提高传动机构300的传动效率。

具体地，壳体310上设置有第三通孔314和第四通孔315，第三通孔314和第四通孔315相对设置，从动轴200的第二端依次穿设第三通孔314和第四通孔315且分别与第三通孔314和第四通孔315转动连接，使从动齿轮330的传动更加稳定。进一步地，从动轴200可以通过轴承分别与第三通孔314和第四通孔315转动连接，也可以通过其他方式分别与第三通孔314和第四通孔315转动连接，在此不再做详细赘述。

示例性地，该扳手的使用方法包括以下步骤：

S100、将螺栓预装在待装配部件上，预紧螺栓。

S200、将该扳手套接于螺栓头部。

具体地，首先将定位件311的定位槽3111与待装配部件的齿轮啮合，此时扳手头211与螺栓相对应，朝向螺栓移动该扳手，将扳手头211压向螺栓的同时，朝一个方向旋拧主动轴100，通过齿轮传动带动从动轴200转动，进而带动扳手头211转动，使扳手头211套接于螺栓头部上。

S300、连接扳手与气动扳手，并拧紧螺栓。

具体地，通过连接部111连接扳手与气动扳手，启动气动扳手，驱动主动轴100转动，主动轴100通过传动机构300带动从动轴200转动，进而带动扳手头211转动以拧紧螺栓。

S400、将气动扳手从扳手上拆下，通过连接部111连接扳手与检测扳手，检测螺栓扭矩。

具体地，工作人员通过读取检测扳手上的检测数据判断螺栓是否拧紧。

本实施例提供的扳手还可以有其他的使用方法，在此不做具体限定。

显然，本实用新型的上述实施例仅仅是为了清楚说明本实用新型所作的举例，而并非是对本实用新型的实施方式的限定。对于所属领域的普通技术人员来说，能够进行各种明显的变化、重新调整和替代而不会脱离本实用新型的保护范围。这里无需也无法对所有的实施方式予以穷举。凡在本实用新型的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本实用新型权利要求的保护范围之内。

Specific embodiments

The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It will be appreciated that the specific embodiments described herein are only used to explain the present invention and not to qualify the present invention. It should also be noted that, in order to facilitate the description, only some but not all of the structure associated with the present invention is shown in the drawings.

In the description of the present utility model, unless otherwise expressly specified and qualified, the terms "connected", "connected", "fixed" should be understood in a broad sense, e.g., may be a fixed connection, may be a detachable connection, or integrated; may be a mechanical connection, may also be an electrical connection; may be directly connected, may also be indirectly connected by an intermediate medium, may be a connection within two elements or the interaction of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present invention may be understood on a case-by-case basis.

In the present invention, unless otherwise expressly specified and qualified, the first feature may include direct contact with the first and second features "above" or "below" of the second feature, or may include that the first and second features are not in direct contact but through additional feature contact between them. Further, the first feature is above the second feature " above " and " above " includes the first feature directly above and obliquely above the second feature , or simply indicates that the horizontal height of the first feature is higher than the second feature. The first feature is "below", "below", and "below" the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the horizontal height of the first feature is less than the second feature.

In the description of the present embodiment, the term "up", "down", "right", iso-azimuth or position relation is based on the orientation or position relationship shown in the accompanying drawings, only to facilitate the description and simplification of operation, and not to indicate or imply that the means or elements referred to must have a particular orientation, structured and operated in a particular orientation, and therefore cannot be construed as a restriction on the present invention. In addition, the terms "first" and "second" are used only to distinguish between descriptions and have no special meaning.

In view of the prior art, in the assembly process of the automotive drive shaft assembly, the wrenching space at the bolt connection of the input and output ends of some drive shafts is small, and the pneumatic tools for tightening the bolts cannot be used. If the use of a wrench to manually tighten the bolt of a component to be assembled requires a time of about 30S, there is a low efficiency, labor intensity problem, the present embodiment provides a wrench, the use of the wrench provided by the present embodiment with the pneumatic wrench to tighten a transmission shaft bolt takes about 6S, reducing labor intensity, improve the efficiency of operation.

Referring to FIG. 1, the wrench provided in the present embodiment includes an active shaft 100, a driven shaft 200 and a transmission mechanism 300, the first end of the active shaft 100 is provided with a connection part 111 connected to the pneumatic wrench, the driven shaft 200 and the active shaft 100 parallel misalignment setting, the first end of the driven shaft 200 is provided with a wrench head 211; the input end of the transmission mechanism 300 is connected to the second end of the active shaft 100, and the output end of the transmission mechanism 300 is connected to the second end of the driven shaft 200, Transmission mechanism 300 includes a housing 310, the housing 310 is provided with a locator 311, the positioning member 311 for fixing the transmission mechanism 300 on the assembly member.

The wrench provided in the present embodiment can be used with an air-operated wrench, and can avoid interference between the wrench and the part to be assembled, to ensure the normal input of power, to complete the tightening of the bolt. The driven shaft 200 and the active shaft 100 of the wrench head 211 are set in parallel misalignment, so that the wrench head 211 can be staggered and the interference between the components to be assembled to be mounted on the bolt head to be tightened, so that the wrench is suitable for a narrow installation space; the positioning member 311 fixes the transmission mechanism 300 to be assembled, when the wrench head 211 is connected to the bolt to be tightened, the pneumatic wrench is connected to the connection part 111 to drive the active shaft 100 rotation, The active shaft 100 drives the driven shaft 200 through the transmission mechanism 300, and then drives the wrench head 211 to rotate to tighten the bolts, complete the assembly of the components to be assembled, the assembly efficiency is high, and the labor intensity of the staff is reduced. In addition, the wrench head 211 does not need to be repeated multiple times to socket the bolt head, thereby effectively protecting the bolt head from damage.

Further, the wrench head 211 and the connection part 111 may be disposed on both sides of the housing 310, the staff holding the active shaft 100 can easily align the wrench head 211 to be tightened bolt, quickly complete the assembly of the assembled parts to be assembled.

In the present embodiment, continuing with reference to FIG. 1, the wrench head 211 is a sleeve-shaped wrench head. Further, the wrench head 211 and the driven shaft 200 may be integrated, may also be detachable connection, the detachable connection can make the wrench replace different specifications of the wrench head 211, a wider range of applications. Further, the wrench head 211 and the driven shaft 200 detachable connection method for the prior art, may be a snap connection, can also be other ways of connection, herein will not be described in detail.

Further, the sleeve-like wrench head 211 sidewall along the circumferential direction may open an opening, the opening may extend to the end of the wrench head 211, the head to be tightened bolt can be through the opening socket within the wrench head 211, so that the wrench can be applied to a smaller installation space.

In the present embodiment, with reference to FIG. 2, the locator 311 and the wrench head 211 are located on the same side of the housing 310, the positioning member 311 is provided with a bump, the bulge can be connected to the assembly member match. Specifically, the bulge is higher than the wrench head 211 is set, the bulge towards the side of the wrench is provided with at least one positioning groove 3111 meshing with the gear to be assembled. In the present embodiment, the positioning member 311 positioning is fast and reliable, the staff first of the locator 311 higher than the wrench head 211 part of the mesh to be assembled part of the gear, at this time the wrench head 211 corresponds to the bolt to be tightened, towards the bolt to be tightened to move the wrench, you can directly align the wrench head 211 to be tightened bolt, and then quickly complete the assembly.

Further, the locating member 311 may be fixed on the housing 310, may also be removable set on the housing 310, specifically, the positioning member 311 is provided with a variety of specifications and models, each specification of the positioning member 311 is installed on the housing 310, each specification of the positioning member 311 on the tooth and wrench head 211 distance is different, and then the wrench suitable for different specifications of the assembled parts.

Further, the connection part 111 can also be connected to the t-shaped wrench, when the pneumatic wrench is damaged or there is no power, it can be connected with the connection part 111 with a t-wrench, the staff drives the active shaft 100 through the t-wrench to rotate, the active shaft 100 drives the driven shaft 200 through the transmission mechanism 300, and then drives the wrench head 211 to rotate to tighten the bolts and complete the assembly of the assembled parts. Further, the connection portion 111 may also be connected to other tools to complete the assembly of the assembled parts, which will not be described in detail here. Specifically, referring to FIG. 3, the end of the connection portion 111 is provided with a connection groove connected to the pneumatic wrench, the connection portion 111 is provided with a pin hole along the radial direction, and the pin hole runs through the connection groove. The present invention is not limited to this, the connection portion 111 may also be connected to other forms of manual wrench tools and electric wrenches tools, which will not be described in detail here.

In the present embodiment, continuing with reference to FIG. 3, the transmission mechanism 300 further comprises an active gear 320 and a driven gear 320 meshing with the active gear 330, the active gear 320 and the driven gear 330 are disposed within the housing 310, the second end of the active shaft 100 is threaded housing 310 and the active gear 320 is connected, the second end of the driven shaft 200 is connected to the housing 310 and the driven gear 330 is connected. Further, the active gear 320 and the driven gear 330 may also be provided with at least one intermediate gear, increasing the distance between the active shaft 100 and the driven shaft 200, and then increasing the distance between the wrench head 211 and the active shaft 100, to achieve interference avoidance of different working spaces. In the present embodiment, the active shaft 100 drives the active gear 320 to rotate, the active gear 320 drives the driven driven gear 330 by meshing, the driven gear 330 drives the driven shaft 200 to rotate, and then drives the wrench head 211 to rotate the bolt, the wrench can be guaranteed in a narrow wrench space, using the active transmission to the driven to achieve torque transmission. The present invention is not limited to this, the transmission mechanism 300 may also be a helical gear transmission mechanism, a herringbone gear transmission mechanism, a ratchet transmission mechanism, a worm gear transmission mechanism or a belt transmission mechanism and the like.

Specifically, the active gear 320 is disposed on the active shaft 100 and connected to the active shaft 100 by the first key 800, the active gear 320 may also be connected to the active shaft 100 in other ways, which will not be described in detail here. Further, the driven gear 330 is disposed on the driven shaft 200 and connected to the driven shaft 200 by the second key 900, the driven gear 330 may also be connected to the driven shaft 200 by other means, not described in detail here. Further, the coupling between the driven shaft 200 and the driven gear 330 prefers the clearance fit.

Further, the active shaft 100 and the housing 310 rotation connection, the active shaft 100 is provided with a first limit member 400 to limit the active shaft 100 along the axial transport movement. Specifically, the first limit member 400 includes a first circlip, the first circlip is disposed within the housing 310 and fits the inner side wall of the housing 310, the active shaft 100 includes a first axis 110 sequentially connected and coaxially arranged, the second axis 120 and the third axis 130, the diameter of the first axis 110 is greater than the diameter of the second axis 120, the diameter of the second axis 120 is greater than the diameter of the third axis 130, the end of the first axis 110 is provided with a connection part 111, the third axis 130 is socketed on the active gear 320, The second axis 120 is provided with a first groove along the circumferential direction, the first circlip is connected to the first groove, the step surface between the first axis 110 and the second axis 120 is close to the outer side wall of the housing 310, the step surface and the first spring cooperate to achieve the axial positioning of the active axis 100. In the present embodiment, the diameter of the second axis 120 is greater than the diameter of the third axis 130, facilitating the installation of the first circlip. Further, the active axis 100 may also be limited by other forms along the axis, which will not be described in detail here.

Further, the steps between the second shaft 120 and the third axis 130 are against the active gear 320, the active gear 320 is provided between the side of the back-to-the-connecting unit 111 and the housing 310 is provided with a first washer 500. Specifically, the first gasket 500 sets are disposed on the active shaft 100, the first gasket 500 one side against the active gear 320, the other side against the housing 310. In the present embodiment, the first washer 500 is a wear-reducing washer, reducing the friction between the active gear 320 and the housing 310, effectively improving the transmission efficiency of the transmission mechanism 300. Specifically, when the wrench head 211 is connected to the bolt, the staff will be screwed in the process of screwing the bolt will be pressed to the bolt, at this time, the active gear 320 pressed to the first washer 500, and then the first washer 500 pressed the housing 310, through the first washer 500, reduce the friction between the active gear 320 and the housing 310, improve the transmission efficiency of the transmission mechanism 300.

Specifically, the housing 310 is provided with a first through hole 312 and a second through hole 313, the first through hole 312 and a second through hole 313 relatively set, the second end of the active shaft 100 is successively pierced with the first through hole 312 and the second through hole 313 and respectively with the first through hole 312 and the second through hole 313 rotation connection, so that the transmission of the active gear 320 is more stable. Further, the active shaft 100 may be connected by bearings to the first through hole 312 and the second through hole 313 rotation, or may be connected by other means to the first through hole 312 and the second through hole 313 rotation, respectively, will not be described in detail here.

Further, the driven shaft 200 is connected to the housing 310 rotation, the driven shaft 200 is provided with a second limit member 600 to limit the driven shaft 200 along the axial movement. Specifically, the second limit member 600 includes a second circlip, the second circlip is disposed within the housing 310 and adheres to the inner side wall of the housing 310, the driven shaft 200 includes a fourth axis 210 sequentially connected and coaxially arranged, the fifth axis 220 and the sixth axis 230, the diameter of the fourth axis 210 is greater than the diameter of the fifth axis 220, the diameter of the fifth axis 220 is greater than the diameter of the sixth axis 230, the end of the fourth axis 210 is provided with a wrench head 211, the fifth axis 220 is socketed with a driven gear 330, The sixth axis 230 is provided with a second groove along the circumference, the second circlip is connected to the second groove, the step surface between the fourth axis 210 and the fifth axis 220 adheres to the outer wall of the housing 310. The step surface is mated with a second circlip to achieve axial positioning of the driven shaft 200. In the present embodiment, the diameter of the fifth axis 220 is greater than the diameter of the sixth axis 230, facilitating the installation of the second circlip. Further, the driven axis 200 may also be limited by other forms along the axis, which will not be described in detail here.

Further, the steps between the fifth axis 220 and the sixth axis 230 are adjacent to the driven gear 330, the active gear 320 back to the side of the wrench head 211 and the housing 310 is provided with a second washer 700. Specifically, the second gasket 700 is provided on the driven shaft 200, the second gasket 700 is against the driven gear 330 on one side, and the other side is against the housing 310. In the present embodiment, the second washer 700 is a wear-reducing washer, reducing the friction between the driven gear 330 and the housing 310, effectively improving the transmission efficiency of the transmission mechanism 300. Specifically, when the wrench head 211 is attached to the bolt, the staff will press the wrench to the bolt in the process of twisting the bolt, at this time, the driven gear 330 is pressed to the second washer 700, and then the second washer 700 presses the housing 310, through the second washer 700, reduce the friction between the driven gear 330 and the housing 310, improve the transmission efficiency of the transmission mechanism 300.

Specifically, the housing 310 is provided with a third through hole 314 and a fourth through hole 315, the third through hole 314 and the fourth through hole 315 relatively set, the second end of the driven shaft 200 is successively pierced with a third through hole 314 and a fourth through hole 315 and respectively with the third through hole 314 and a fourth through hole 315 rotation connection, so that the transmission of the driven gear 330 is more stable. Further, the driven shaft 200 may be connected by bearing rotation to the third through hole 314 and the fourth through hole 315, or by other means, respectively, with the third through hole 314 and the fourth through hole 315 rotational connection, which will not be described in detail here.

Exemplary, the use of the wrench comprises the following steps:

S100, pre-install the bolts on the parts to be assembled, pre-tighten the bolts.

S200, attach the wrench glove to the bolt head.

Specifically, the positioning groove 3111 of the positioning member 311 is meshed with the gear of the part to be assembled, at this time the wrench head 211 corresponds to the bolt, the wrench is moved towards the bolt, the wrench head 211 is pressed to the bolt at the same time, the active shaft 100 is screwed in one direction, the driven driven shaft 200 is rotated by the gear transmission, and then the wrench head 211 is rotated, so that the wrench head 211 is attached to the bolt head.

S300, connect the wrench to the pneumatic wrench and tighten the bolts.

Specifically, through the connection part 111 to connect the wrench and the pneumatic wrench, start the pneumatic wrench, drive the active shaft 100 to rotate, the active shaft 100 through the transmission mechanism 300 to drive the driven shaft 200 rotation, and then drive the wrench head 211 to rotate to tighten the bolt.

S400, remove the pneumatic wrench from the wrench, connect the wrench to the test wrench through the connection part 111, and detect the bolt torque.

Specifically, the staff determines whether the bolt is tightened by reading the inspection data on the detection wrench.

The wrench provided in this embodiment may also have other ways of use, which are not specifically limited herein.

Obviously, the above-mentioned embodiments of the present invention are merely intended to illustrate the examples made in the present utility model and are not a limitation of the embodiments of the present invention. For those of ordinary skill in the art, various obvious changes, readjustments and substitutions can be carried out without departing from the scope of protection of the present invention. There is no need and can not be exhausted in all embodiments. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this utility model shall be included in the scope of protection of the claims of this utility model.