具体实施方式

下面结合附图来进一步说明本实用新型的具体实施方式。其中相同的零部件用相同的附图标记表示。需要说明的是，下面描述中使用的词语“前”、“后”、“左”、“右”、“上”和“下”指的是附图中的方向，词语“内”和“外”分别指的是朝向或远离特定部件几何中心的方向。

如图1-4和图6-8所示，本实用新型一实施例提供的后车架结构，包括后车架1、用于拉紧备胎6的拉索机构3和用于抵接备胎6的胎壁62的承载盘4。

后车架1的底部安装有两根平行布置的横梁2。

承载盘4包括环形顶板41和连接在环形顶板41的边缘的一圈环形罩板42。

环形顶板41与两根横梁2连接，环形顶板41的中心孔411处于两根横梁2之间。

拉索机构3包括安装架31、安装在安装架31的后端的绞盘32、与绞盘32连接的拉索33和与拉索33可拆卸连接的限位件34。

安装架31的后端连接后车架1的后部，安装架31的前端处于两根横梁2之间，安装架31与两根横梁2中后方的一根横梁2连接。

拉索33向下穿过中心孔411，限位件34处于环形顶板41的下方。

本实用新型提供的后车架结构为车辆底盘的后半部分结构，其包括后车架1、两根横梁2、拉索机构3和承载盘4。

后车架1包括地板，两根横梁2焊接在地板的底部，两根横梁2平行布置，横梁2沿着后车架1的宽度方向延伸，也即是沿着后车架1的左右方向延伸。

拉索机构3用于将备胎6向上拉紧。拉索机构3包括安装架31、绞盘32、拉索33、限位件34、护管35和转接管头36。

安装架31的顶面具有安装槽311，安装架31的后端具有倾斜延伸的支撑板312，安装架31的前端具有安装孔313。

护管35与绞盘32连接，转接管头36可拆卸地连接在护管35的前端。绞盘32安装在安装架31的后端的支撑板312上，绞盘32的六角转轴321向后向上倾斜延伸。护管35处于安装槽311中，转接管头36安装在安装孔313中，转接管头36朝下转向。拉索33的一端与绞盘32连接，拉索33穿过护管35和转接管头36。限位件34可为限位板，其通过螺母、卡箍等锁紧在拉索33的末端。

安装架31的后端通过紧固件(螺栓、螺钉等)安装在后车架1的后部。安装架31的前端伸入前后两根横梁2之间，安装架31与后侧的一根横梁2通过紧固件(螺栓、螺钉等)连接。限位件34从两根横梁2之间向下垂下。

承载盘4用于抵接平放的备胎6的上侧胎壁62。承载盘4包括环形顶板41和环形罩板42。环形罩板42连接在环形顶板41的边缘，环形罩板42朝下，用于包住备胎6的胎面的一部分。环形顶板41与两根横梁2连接。环形顶板41与横梁2可焊接，也可通过紧固件(螺栓、螺钉等)连接。环形顶板41的中心孔411处于两根横梁2之间。拉索33向下穿过中心孔411，限位件34处于环形顶板41的下方。

在安装备胎6时，将备胎6平放。将限位件34从拉索33上拆下，将拉索33的末端穿过备胎6的轮毂61的轮毂中心孔。再将限位件34与拉索33的末端连接，限位件34横置不能穿过轮毂中心孔。再通过内六角扳手转动六角转轴321，拉紧拉索33，通过限位件34将备胎6挂起，直至备胎6的胎壁62与环形顶板41抵接。

环形顶板41与胎壁62的一圈都接触，增大了与胎壁62的接触面积，备胎6的受力均匀，可避免失稳造成异响。环形顶板41一块环形板，表面平整，可实现环形顶板41与胎壁62的接触面在同一平面上，可避免局部挤压胎壁62，避免胎壁62局部受压而导致损伤。

在其中一个实施例中，如图1-2所示，环形顶板41与每根横梁2都通过至少两根螺栓5连接。

本实施例中，环形顶板41和横梁2上都配置至少两个安装通孔，在横梁2的安装通孔处配置有螺母。环形顶板41的前半部分通过至少两根螺栓5与前侧的横梁2连接，环形顶板41的后半部分通过至少两根螺栓5与后侧的横梁2连接。螺栓5从下往上依次穿过环形顶板41的安装通孔、横梁2的安装通孔，然后与横梁2上的螺母连接。

本实施例中，承载盘4可根据需要通过螺栓5安装在横梁2的下方，以适应需要配置备胎的车型。也可根据需要，将承载盘4拆下，以适应不用配置备胎的车型。

在其中一个实施例中，如图1-2所示，环形顶板41与一根横梁2通过两根螺栓5连接，环形顶板41与另一根横梁2通过三根螺栓5连接。

本实施例中，环形顶板41通过五根螺栓5与两根横梁2连接，一根横梁2上的两根螺栓5与另一根横梁2上任一根螺栓5都呈三角形布置，提高了承载盘4与横梁2的连接稳定性。

在其中一个实施例中，如图3-5和图9所示，环形顶板41对应每个螺栓5的位置都向上凹陷形成有收纳槽412，收纳槽412的槽顶具有螺栓过孔413。

螺栓5的螺栓头51收纳在收纳槽412中，螺栓5的螺柱52穿过螺栓过孔413并与横梁2连接。

本实施例中，在每个需要安装螺栓5的位置处，环形顶板41上都具有向上凹陷形成的收纳槽412。收纳槽412可通过冲压工具直接在环形顶板41冲压成型。收纳槽412的槽顶(顶板)上冲制有螺栓过孔413。

连接时，螺栓头51处于收纳槽412中，螺柱52穿过螺栓过孔413，然后与横梁2上的螺母连接。收纳槽412的深度大于螺栓头51的高度，螺栓头51收纳在收纳槽412中，避免损伤胎壁62。

在其中一个实施例中，如图9-10所示，横梁2为方管梁21。

方管梁21对应每个螺栓5的位置都开设有方管梁通孔211，方管梁21中对应每个方管梁通孔211都焊接有一个焊接螺母22。

螺柱52穿过方管梁通孔211并与焊接螺母22连接。

本实施例中，横梁2为方管梁21，利于减轻重量。每根方管梁21的底板上在安装螺栓5的位置都开设有方管梁通孔211，方管梁21中对应每个方管梁通孔211的位置都预先焊接有焊接螺母22。方管梁通孔211可为过孔，焊接螺母22可从方管梁通孔211放置到方管梁21中，然后通过激光焊焊接固定。

连接时，螺栓头51处于收纳槽412中，螺柱52穿过螺栓过孔413、和方管梁通孔211，然后与焊接螺母22连接。

将焊接螺母22设置在方管梁21中，螺柱52无需完全穿过横梁2，可减少螺柱52的长度，也可避免螺柱52外漏，影响横梁2与地板的焊接。

在其中一个实施例中，如图1-2所示，后车架1的后端具有向下凸起的翻边梁11。安装架31的后端与翻边梁11连接。

翻边梁11焊接在后车架1的后端，有利于提高后车架1的尾部的结构强度，也便于安装架31后端的倾斜的支撑板312与翻边梁11连接。

在其中一个实施例中，环形罩板42与环形顶板41一体成型，有利于提高承载盘4的结构强度，利于延长使用寿命。

在其中一个实施例中，承载盘4由钢板一体冲压成型，便于加工成型。

在其中一个实施例中，钢板的厚度在0.65mm—3.0mm之间选择，既满足承载的需要，又避免钢板过厚。

本实用新型一实施例提供一种车辆，包括前述任一实施例所述的后车架结构。后车架结构为车辆底盘的后半部分结构。

根据需要，可以将上述各技术方案进行结合，以达到最佳技术效果。

以上的仅是本实用新型的原理和较佳的实施例。应当指出，对于本领域的普通技术人员来说，在本实用新型原理的基础上，还可以做出若干其它变型，也应视为本实用新型的保护范围。

Specific embodiment

The following is combined with the accompanying drawings to further illustrate the specific embodiment of the present invention. Where identical components are represented by the same drawing markings. It should be noted that the terms "front", "back", "left", "right", "up" and "bottom" used in the following description refer to the orientation in the drawing, and the words "inside" and "outside" refer to the direction towards or away from the geometric center of a particular component, respectively.

As shown in FIGS. 1-4 and FIG. 6-8, an embodiment of the present invention provides a rear frame structure, including a rear frame 1, a cable mechanism 3 for tightening the spare tire 6 and a load disc 4 for resisting the tire wall 62 of the spare tire 6.

The bottom of the rear frame 1 is fitted with two parallel beam 2.

The load plate 4 includes a ring roof plate 41 and a ring of ring cover plate 42 connected to the edge of the ring top plate 41.

The annular roof plate 41 is connected to two beams 2, and the center hole 411 of the annular roof plate 41 is between the two beams 2.

The cable mechanism 3 includes a mounting frame 31, a winch 32 mounted at the rear end of the mounting frame 31, a cable 33 connected to the winch 32 and a limit member 34 connected with the cable 33 removable connection.

The rear end of the mounting frame 31 is connected to the rear of the rear frame 1, the front end of the mounting frame 31 is between the two cross members 2, and the mounting frame 31 is connected to one of the two cross members 2 in the rear of the two cross members 2.

The cable 33 goes down through the center hole 411, and the limit member 34 is below the annular top plate 41.

The rear frame structure provided by the utility model is the rear half of the vehicle chassis, which includes a rear frame 1, two cross members 2, a cable mechanism 3 and a bearing disc 4.

The rear frame 1 includes the floor, two cross members 2 are welded to the bottom of the floor, the two cross members 2 are arranged in parallel, and the cross member 2 extends along the width of the rear frame 1, that is, along the left and right direction of the rear frame 1.

Cable mechanism 3 is used to pull the spare wheel 6 up tight. The cable mechanism 3 includes a mounting frame 31, a winch 32, a cable 33, a limit member 34, a protective pipe 35 and a rotary head 36.

The top surface of the mounting frame 31 has a mounting slot 311, the rear end of the mounting frame 31 has an oblique extension of the support plate 312, and the front end of the mounting frame 31 has a mounting hole 313.

The guard pipe 35 is connected to the winch 32, and the rotary head 36 is removably connected to the front end of the guard pipe 35. The winch 32 is mounted on the support plate 312 of the rear end of the mounting frame 31, and the hexagonal shaft 321 of the winch 321 extends backward and upward. The guard pipe 35 is in the mounting slot 311, the rotary pipe head 36 is installed in the mounting hole 313, and the rotary pipe head 36 is turned downward. One end of the cable 33 is connected to the winch 32, the cable 33 passes through the guard pipe 35 and the rotary pipe head 36. The limit member 34 may be a limit plate, which is locked at the end of the cable 33 by a nut, clamp, etc.

The rear end of the mounting frame 31 is mounted at the rear of the rear frame 1 by fasteners (bolts, screws, etc.). The front end of the mounting frame 31 extends between the front and rear two beams 2, and the mounting frame 31 and one of the rear side beams 2 are connected by fasteners (bolts, screws, etc.). The limit member 34 hangs down from between the two beams 2.

Carrier disc 4 is used to meet the upper side wall 62 of the flat spare wheel 6. The load plate 4 includes an annular top plate 41 and an annular grille plate 42. The ring bezel 42 is attached to the edge of the annular top plate 41, and the ring bezel 42 is facing down, for enveloping part of the tread of the spare wheel 6. The annular roof plate 41 is connected with two beams 2. The ring top plate 41 and the beam 2 can be welded or connected by fasteners (bolts, screws, etc.). The center hole 411 of the annular roof plate 41 is between two beams 2. The cable 33 goes down through the center hole 411, and the limit member 34 is below the annular top plate 41.

When installing the spare wheel 6, lay the spare wheel 6 flat. Remove the limit piece 34 from the cable 33 and pass the end of the cable 33 through the hub center hole of hub 61 of the spare wheel 6. The limit member 34 is then connected to the end of the cable 33, and the limit member 34 cannot pass through the center hole of the hub. Then turn the hex shaft 321 by means of an Allen wrench, tighten the cable 33, and suspend the spare wheel 6 through the limit member 34 until the tire wall 62 of the spare wheel 6 meets the annular roof plate 41.

The ring roof plate 41 is in contact with the tire wall 62, which increases the contact area with the tire wall 62, and the force of the spare tire 6 is uniform, which can avoid abnormal noise caused by instability. Annular top plate 41 A ring plate, the surface is flat, can realize the contact surface of the annular roof plate 41 and the tire wall 62 on the same plane, can avoid local extrusion of the tire wall 62, avoid the local compression of the tire wall 62 caused by damage.

In one of these embodiments, as shown in FIGS. 1-2, the annular top plate 41 and each beam 2 are connected by at least two bolts 5.

In the present embodiment, the annular top plate 41 and the beam 2 are provided with at least two mounting holes, and nuts are provided at the mounting through holes of the beam 2. The front half of the annular roof plate 41 is connected to the cross member 2 on the front side by at least two bolts 5, and the rear half of the ring roof plate 41 is connected to the cross member 2 on the rear side by at least two bolts 5. Bolt 5 passes sequentially from bottom to top through the mounting through hole of the annular top plate 41, the mounting through hole of beam 2, and then connects with the nut on beam 2.

In the present embodiment, the load plate 4 may be mounted under the beam 2 by bolt 5 as needed to accommodate the model that needs to be equipped with a spare tire. Carrier plate 4 can also be removed as needed to accommodate models that do not require spare tires.

In one embodiment, as shown in FIGS. 1-2, the annular roof plate 41 is connected to a cross member 2 by two bolts 5, and the ring roof plate 41 is connected to another cross member 2 by three bolts 5.

In the present embodiment, the annular roof plate 41 is connected to two beams 2 through five bolts 5, and the two bolts 5 on one beam 2 and any bolt 5 on the other beam 2 are arranged in a triangular arrangement, improving the connection stability of the bearing plate 4 and the beam 2.

In one embodiment, as shown in FIGS. 3-5 and FIG. 9, the annular roof plate 41 corresponds to each bolt 5 position is concave upwards to form a storage slot 412, the top of the storage slot 412 has a bolt through hole 413.

The bolt head 51 of bolt 5 is stored in the storage groove 412, and the stud 52 of bolt 5 passes through the bolt through the hole 413 and is connected to the beam 2.

In the present embodiment, at each position where bolt 5 needs to be installed, the annular top plate 41 has an upward depression formation of a storage groove 412. The storage groove 412 may be stamped directly on the annular roof plate 41 by a stamping tool. The top (top plate) of the storage slot 412 is punched with bolt vias 413.

When connected, the bolt head 51 is in the storage slot 412, the stud 52 passes through the bolt through the hole 413, and then connects with the nut on the beam 2. The depth of the storage groove 412 is greater than the height of the bolt head 51, and the bolt head 51 is stored in the storage groove 412 to avoid damage to the tire wall 62.

In one of these embodiments, as shown in FIG. 9-10, the beam 2 is a square pipe beam 21.

The square pipe beam 21 corresponds to each bolt 5 position is provided with a square pipe beam through hole 211, the square pipe beam 21 corresponds to each square pipe beam through hole 211 welded with a welding nut 22.

Stud 52 passes through the square pipe beam through hole 211 and is connected with a welded nut 22.

In the present embodiment, the beam 2 is a square pipe beam 21, which is conducive to reducing weight. The bottom plate of each square pipe beam 21 is provided with a square pipe beam through hole 211 at the position of installing bolt 5, and the position corresponding to each square pipe beam through hole 211 in the square pipe beam 21 is pre-welded with a welding nut 22. Square pipe beam through hole 211 may be a via, welding nut 22 can be placed from the square pipe beam through hole 211 into the square pipe beam 21, and then fixed by laser welding welding.

When connected, the bolt head 51 is in the storage groove 412, the stud 52 passes through the bolt through hole 413, and the square pipe beam through hole 211, and then connected with the weld nut 22.

The welding nut 22 is provided in the square pipe beam 21, the stud 52 does not need to completely pass through the beam 2, which can reduce the length of the stud 52, and also avoid the leakage of the stud 52, affecting the welding of the beam 2 and the floor.

In one of these embodiments, as shown in FIGS. 1-2, the rear end of the rear frame 1 has a downward convex flange beam 11. The rear end of the mounting frame 31 is connected to the flange beam 11.

The flange beam 11 is welded to the rear end of the rear frame 1, which is conducive to improving the structural strength of the tail of the rear frame 1, and also facilitates the installation of the inclined support plate 312 at the rear end of the mounting frame 31 and the flange beam 11 connection.

In one embodiment, the annular cover plate 42 and the annular top plate 41 are integrally formed, which is conducive to improving the structural strength of the bearing plate 4, and is conducive to prolonging the service life.

In one of the embodiments, the bearing plate 4 is stamped and formed by a steel plate integrally to facilitate processing and forming.

In one of the embodiments, the thickness of the steel plate is selected between 0.65mm and 3.0mm, which not only meets the bearing needs, but also avoids the steel plate being too thick.

An embodiment of the present invention provides a vehicle, comprising a rear frame structure described in any of the foregoing embodiments. The rear frame structure is the rear half of the vehicle chassis.

According to the needs, the above technical solutions can be combined to achieve the best technical effect.

The above is only the principle of the present invention and the best embodiment. It should be noted that for those of ordinary skill in the art, on the basis of the principle of the present invention, a number of other variants may be made, which should also be regarded as the scope of protection of the present invention.

Specific embodiment

The following is combined with the accompanying drawings to further illustrate the specific embodiment of the present invention. Where identical components are represented by the same drawing markings. It should be noted that the terms "front", "back", "left", "right", "up" and "bottom" used in the following description refer to the orientation in the drawing, and the words "inside" and "outside" refer to the direction towards or away from the geometric center of a particular component, respectively.

As shown in FIGS. 1-4 and FIG. 6-8, an embodiment of the present invention provides a rear frame structure, including a rear frame 1, a cable mechanism 3 for tightening the spare tire 6 and a load disc 4 for resisting the tire wall 62 of the spare tire 6.

The bottom of the rear frame 1 is fitted with two parallel beam 2.

The load plate 4 includes a ring roof plate 41 and a ring of ring cover plate 42 connected to the edge of the ring top plate 41.

The annular roof plate 41 is connected to two beams 2, and the center hole 411 of the annular roof plate 41 is between the two beams 2.

The cable mechanism 3 includes a mounting frame 31, a winch 32 mounted at the rear end of the mounting frame 31, a cable 33 connected to the winch 32 and a limit member 34 connected with the cable 33 removable connection.

The rear end of the mounting frame 31 is connected to the rear of the rear frame 1, the front end of the mounting frame 31 is between the two cross members 2, and the mounting frame 31 is connected to one of the two cross members 2 in the rear of the two cross members 2.

The cable 33 goes down through the center hole 411, and the limit member 34 is below the annular top plate 41.

The rear frame structure provided by the utility model is the rear half of the vehicle chassis, which includes a rear frame 1, two cross members 2, a cable mechanism 3 and a bearing disc 4.

The rear frame 1 includes the floor, two cross members 2 are welded to the bottom of the floor, the two cross members 2 are arranged in parallel, and the cross member 2 extends along the width of the rear frame 1, that is, along the left and right direction of the rear frame 1.

Cable mechanism 3 is used to pull the spare wheel 6 up tight. The cable mechanism 3 includes a mounting frame 31, a winch 32, a cable 33, a limit member 34, a protective pipe 35 and a rotary head 36.

The top surface of the mounting frame 31 has a mounting slot 311, the rear end of the mounting frame 31 has an oblique extension of the support plate 312, and the front end of the mounting frame 31 has a mounting hole 313.

The guard pipe 35 is connected to the winch 32, and the rotary head 36 is removably connected to the front end of the guard pipe 35. The winch 32 is mounted on the support plate 312 of the rear end of the mounting frame 31, and the hexagonal shaft 321 of the winch 321 extends backward and upward. The guard pipe 35 is in the mounting slot 311, the rotary pipe head 36 is installed in the mounting hole 313, and the rotary pipe head 36 is turned downward. One end of the cable 33 is connected to the winch 32, the cable 33 passes through the guard pipe 35 and the rotary pipe head 36. The limit member 34 may be a limit plate, which is locked at the end of the cable 33 by a nut, clamp, etc.

The rear end of the mounting frame 31 is mounted at the rear of the rear frame 1 by fasteners (bolts, screws, etc.). The front end of the mounting frame 31 extends between the front and rear two beams 2, and the mounting frame 31 and one of the rear side beams 2 are connected by fasteners (bolts, screws, etc.). The limit member 34 hangs down from between the two beams 2.

Carrier disc 4 is used to meet the upper side wall 62 of the flat spare wheel 6. The load plate 4 includes an annular top plate 41 and an annular grille plate 42. The ring bezel 42 is attached to the edge of the annular top plate 41, and the ring bezel 42 is facing down, for enveloping part of the tread of the spare wheel 6. The annular roof plate 41 is connected with two beams 2. The ring top plate 41 and the beam 2 can be welded or connected by fasteners (bolts, screws, etc.). The center hole 411 of the annular roof plate 41 is between two beams 2. The cable 33 goes down through the center hole 411, and the limit member 34 is below the annular top plate 41.

When installing the spare wheel 6, lay the spare wheel 6 flat. Remove the limit piece 34 from the cable 33 and pass the end of the cable 33 through the hub center hole of hub 61 of the spare wheel 6. The limit member 34 is then connected to the end of the cable 33, and the limit member 34 cannot pass through the center hole of the hub. Then turn the hex shaft 321 by means of an Allen wrench, tighten the cable 33, and suspend the spare wheel 6 through the limit member 34 until the tire wall 62 of the spare wheel 6 meets the annular roof plate 41.

The ring roof plate 41 is in contact with the tire wall 62, which increases the contact area with the tire wall 62, and the force of the spare tire 6 is uniform, which can avoid abnormal noise caused by instability. Annular top plate 41 A ring plate, the surface is flat, can realize the contact surface of the annular roof plate 41 and the tire wall 62 on the same plane, can avoid local extrusion of the tire wall 62, avoid the local compression of the tire wall 62 caused by damage.

In one of these embodiments, as shown in FIGS. 1-2, the annular top plate 41 and each beam 2 are connected by at least two bolts 5.

In the present embodiment, the annular top plate 41 and the beam 2 are provided with at least two mounting holes, and nuts are provided at the mounting through holes of the beam 2. The front half of the annular roof plate 41 is connected to the cross member 2 on the front side by at least two bolts 5, and the rear half of the ring roof plate 41 is connected to the cross member 2 on the rear side by at least two bolts 5. Bolt 5 passes sequentially from bottom to top through the mounting through hole of the annular top plate 41, the mounting through hole of beam 2, and then connects with the nut on beam 2.

In the present embodiment, the load plate 4 may be mounted under the beam 2 by bolt 5 as needed to accommodate the model that needs to be equipped with a spare tire. Carrier plate 4 can also be removed as needed to accommodate models that do not require spare tires.

In one embodiment, as shown in FIGS. 1-2, the annular roof plate 41 is connected to a cross member 2 by two bolts 5, and the ring roof plate 41 is connected to another cross member 2 by three bolts 5.

In the present embodiment, the annular roof plate 41 is connected to two beams 2 through five bolts 5, and the two bolts 5 on one beam 2 and any bolt 5 on the other beam 2 are arranged in a triangular arrangement, improving the connection stability of the bearing plate 4 and the beam 2.

In one embodiment, as shown in FIGS. 3-5 and FIG. 9, the annular roof plate 41 corresponds to each bolt 5 position is concave upwards to form a storage slot 412, the top of the storage slot 412 has a bolt through hole 413.

The bolt head 51 of bolt 5 is stored in the storage groove 412, and the stud 52 of bolt 5 passes through the bolt through the hole 413 and is connected to the beam 2.

In the present embodiment, at each position where bolt 5 needs to be installed, the annular top plate 41 has an upward depression formation of a storage groove 412. The storage groove 412 may be stamped directly on the annular roof plate 41 by a stamping tool. The top (top plate) of the storage slot 412 is punched with bolt vias 413.

When connected, the bolt head 51 is in the storage slot 412, the stud 52 passes through the bolt through the hole 413, and then connects with the nut on the beam 2. The depth of the storage groove 412 is greater than the height of the bolt head 51, and the bolt head 51 is stored in the storage groove 412 to avoid damage to the tire wall 62.

In one of these embodiments, as shown in FIG. 9-10, the beam 2 is a square pipe beam 21.

The square pipe beam 21 corresponds to each bolt 5 position is provided with a square pipe beam through hole 211, the square pipe beam 21 corresponds to each square pipe beam through hole 211 welded with a welding nut 22.

Stud 52 passes through the square pipe beam through hole 211 and is connected with a welded nut 22.

In the present embodiment, the beam 2 is a square pipe beam 21, which is conducive to reducing weight. The bottom plate of each square pipe beam 21 is provided with a square pipe beam through hole 211 at the position of installing bolt 5, and the position corresponding to each square pipe beam through hole 211 in the square pipe beam 21 is pre-welded with a welding nut 22. Square pipe beam through hole 211 may be a via, welding nut 22 can be placed from the square pipe beam through hole 211 into the square pipe beam 21, and then fixed by laser welding welding.

When connected, the bolt head 51 is in the storage groove 412, the stud 52 passes through the bolt through hole 413, and the square pipe beam through hole 211, and then connected with the weld nut 22.

The welding nut 22 is provided in the square pipe beam 21, the stud 52 does not need to completely pass through the beam 2, which can reduce the length of the stud 52, and also avoid the leakage of the stud 52, affecting the welding of the beam 2 and the floor.

In one of these embodiments, as shown in FIGS. 1-2, the rear end of the rear frame 1 has a downward convex flange beam 11. The rear end of the mounting frame 31 is connected to the flange beam 11.

The flange beam 11 is welded to the rear end of the rear frame 1, which is conducive to improving the structural strength of the tail of the rear frame 1, and also facilitates the installation of the inclined support plate 312 at the rear end of the mounting frame 31 and the flange beam 11 connection.

In one embodiment, the annular cover plate 42 and the annular top plate 41 are integrally formed, which is conducive to improving the structural strength of the bearing plate 4, and is conducive to prolonging the service life.

In one of the embodiments, the bearing plate 4 is stamped and formed by a steel plate integrally to facilitate processing and forming.

In one of the embodiments, the thickness of the steel plate is selected between 0.65mm and 3.0mm, which not only meets the bearing needs, but also avoids the steel plate being too thick.

An embodiment of the present invention provides a vehicle, comprising a rear frame structure described in any of the foregoing embodiments. The rear frame structure is the rear half of the vehicle chassis.

According to the needs, the above technical solutions can be combined to achieve the best technical effect.

The above is only the principle of the present invention and the best embodiment. It should be noted that for those of ordinary skill in the art, on the basis of the principle of the present invention, a number of other variants may be made, which should also be regarded as the scope of protection of the present invention.