Positioning tool based on rear axle plate spring positioning and production line

Abstract

The utility model relates to the technical field of automobile assembly, and provides a positioning tool and a production line based on rear axle plate spring positioning, which comprise a main positioning mechanism used for centering and positioning a rear axle and a plate spring positioning piece used for positioning a plate spring, and the plate spring positioning piece and the main positioning mechanism are assembled in a centering manner. The number of the plate spring positioning pieces corresponding to the main positioning mechanism is at least two, and the parallel state of the plate spring and the first central axis of the main positioning mechanism can be guaranteed through multi-point positioning. According to the positioning tool based on rear axle plate spring positioning and the production line, the rear axle and the plate spring are centered and positioned through the main positioning mechanism and the plate spring positioning piece respectively, and alignment posture limiting of the rear axle and the plate spring can be guaranteed by combining centering and positioning of the main positioning mechanism and the plate spring positioning piece; interference of shaking of the jacking machine in operation on positioning postures of the rear axle and the plate spring is avoided, the assembly precision is guaranteed, the repair rate is reduced, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile assembly, in particular to a positioning tool and a production line based on rear bridge leaf spring positioning. Background Art

[0002] In the automobile rear axle leaf spring installation production line, before the leaf spring is fixed, it is necessary to pre-position the leaf spring at the installation position, and then transfer it to the subsequent fixed assembly station after pre-positioning.

[0003] Among them, during the transportation of the rear axle, the rear axle needs to be lifted by a jacking machine before moving. The jacking machine is prone to shaking during operation, causing the alignment state between the rear axle and the leaf spring to shift. The line needs to be stopped for repair to correct the offset, and in actual production, the repair rate is very high, which greatly reduces production efficiency and increases production costs. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide a positioning tool and production line based on rear axle leaf spring positioning to solve the problem that the rework rate of automobile rear axle leaf spring installation production line in the prior art is high, which will reduce production efficiency and increase production costs.

[0005] The utility model provides a positioning tool based on the positioning of the leaf spring of the rear bridge, comprising: a main positioning mechanism and a leaf spring positioning member, wherein:

[0006] The main positioning mechanism includes a base plate, and a first limiting rod, a second limiting rod and a positioning guide plate fixedly arranged on the base plate, wherein two first limiting rods are arranged along the first central axis of the base plate and are respectively extended outwardly, the positioning guide plate is arranged on the first central axis and is used for positioning the flange of the rear axle main reducer, and two second limiting rods are symmetrically arranged on both sides of the first central axis and are used for limiting the left and right half-axle housings of the rear axle;

[0007] The leaf spring positioning member includes an assembly rod, and a first clamping plate and a second clamping plate arranged on the assembly rod, wherein the second clamping plate is arranged at both ends of the assembly rod, and the first clamping plate is arranged at the center position between the two second clamping plates, and the second clamping plate is used for positioning the leaf spring, so that the leaf spring aligned with the second clamping plate is aligned with the main positioning mechanism through the engagement and positioning of the first clamping plate and the first limiting rod, wherein the leaf spring positioning members corresponding to the main positioning mechanism include at least two.

[0008] Optionally, a first mounting seat is fixedly provided on the base plate, and the positioning guide plate can be flipped and movably provided on the first mounting seat. The positioning guide plate includes a bottom panel and a U-shaped side panel, and the closed side of the U-shaped side panel is rotatably and movably connected to the first mounting seat.

[0009] Optionally, the two side panels of the U-shaped side panel are convex-shaped panels.

[0010] Optionally, a second mounting seat is fixedly arranged on the bottom plate, and the second limiting rod is rotatably arranged on the second mounting seat, and the rotation direction is consistent with the extending direction of the first central axis.

[0011] Optionally, the second mounting seat includes a vertical mounting groove, and two first side plates opposite to the vertical mounting groove are arranged to extend upward, so that a rotating shaft is arranged on the extended portion of the first side plate, and the cross-sectional size of the vertical mounting groove is consistent with the size of the second limiting rod, so that the second limiting rod can be embedded and fixed in the vertical mounting groove;

[0012] A strip hole is provided on the root side wall of the second limiting rod so as to be movably connected with the rotating shaft through the strip hole, and the extending direction of the strip hole is consistent with the extending direction of the second limiting rod;

[0013] A pouring opening is provided at the front top of the vertical installation groove, and the width of the pouring opening is greater than or equal to the width of the second limiting rod.

[0014] Optionally, the groove bottom plate of the vertical installation groove extends horizontally outward, and reinforcing ribs are provided between the outer wall of the first side plate and the groove bottom plate.

[0015] Optionally, one of the first limiting rods is fixedly disposed on the first mounting seat.

[0016] Optionally, it also includes a frame limiting mechanism, which includes a mounting block fixedly mounted on the outer side wall of the frame support frame, and a lever arranged on the mounting block, the lever is movably connected to the mounting block via a hinge, and the movable surface of the lever is the side surface of the frame support frame.

[0017] Optionally, it also includes a leaf spring guide, which is fixedly arranged on the frame support frame, and a guide path is opened on the top of the leaf spring guide, the extension direction of the guide path is consistent with the longitudinal direction of the frame support frame, and the width of the guide path gradually decreases from top to bottom.

[0018] The utility model also provides a production line, comprising the above-mentioned positioning tooling based on rear axle leaf spring positioning.

[0019] The positioning tooling based on the rear axle leaf spring positioning provided by the utility model comprises: a main positioning mechanism and a leaf spring positioning piece, wherein the main positioning mechanism comprises a base plate, and a first limiting rod, a second limiting rod and a positioning guide plate fixedly arranged on the base plate, two first limiting rods are arranged along the first central axis of the base plate, and are respectively extended outwardly, the positioning guide plate is arranged on the first central axis, and is used for positioning the flange of the rear axle main reducer, two second limiting rods are symmetrically arranged on both sides of the first central axis, and are used for limiting the left and right half-axle housings of the rear axle, and the positioning of the rear axle by the main positioning mechanism can be achieved Effectively ensure the vertical centered positioning state of the rear axle axis and the first central axis; the leaf spring positioning member includes an assembly rod, and a first clamping plate and a second clamping plate arranged on the assembly rod, the second clamping plate is arranged at the two end positions of the assembly rod, the first clamping plate is arranged at the center position between the two second clamping plates, and the second clamping plate is used for positioning the leaf spring, so as to position the leaf spring aligned with the second clamping plate through the engagement positioning of the first clamping plate and the first limiting rod, and align the leaf spring with the second clamping plate with the main positioning mechanism, wherein the leaf spring positioning members corresponding to the main positioning mechanism include at least two, and the parallel state of the leaf spring and the first central axis can be ensured through multi-point positioning. The positioning tool based on the rear axle leaf spring positioning provided by the utility model performs centering positioning of the rear axle and the leaf spring respectively through the main positioning mechanism and the leaf spring positioning piece, and the centering positioning of the main positioning mechanism and the leaf spring positioning piece can ensure the limit of the alignment posture of the rear axle and the leaf spring, avoid the interference of the shaking of the jacking machine during operation on the alignment posture of the rear axle and the leaf spring, ensure assembly accuracy, reduce the rework rate, improve production efficiency, and reduce production costs. The main positioning mechanism can realize the center alignment of various rear axles through the second limit rod and the positioning guide plate, so as to be compatible with the assembly of rear axles of various lengths and improve the mixed line production capacity of the production line.

[0020] The production line provided by the utility model includes the above-mentioned positioning tooling based on the rear axle leaf spring positioning, which can effectively ensure the limit of the alignment posture of the rear axle and the leaf spring, avoid the interference of the shaking of the jacking machine during operation on the alignment posture of the rear axle and the leaf spring, ensure assembly accuracy, reduce the rework rate, improve production efficiency, and reduce production costs. The main positioning mechanism can realize the center alignment of various rear axles through the second limit rod and the positioning guide plate, so that it can be compatible with the assembly of rear axles of different lengths, thereby improving the mixed line production capacity of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the main structure of the positioning tool based on the rear axle leaf spring positioning in the embodiment of the utility model;

[0022] Figure 2 It is a schematic diagram of the configuration structure of the leaf spring guide member of the positioning tool based on the rear axle leaf spring positioning in the embodiment of the utility model;

[0023] Figure 3It is a structural schematic diagram of a vehicle frame limiting mechanism of a positioning tool based on rear axle leaf spring positioning in an embodiment of the utility model;

[0024] Figure 4 It is a schematic assembly diagram of the positioning tool based on the rear axle leaf spring positioning in the embodiment of the utility model in the use state.

[0025] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0029] In order to solve the problem that the rework rate of the automobile rear axle leaf spring installation production line in the prior art is high, which will reduce production efficiency and increase production costs. The utility model provides a positioning tool based on the positioning of the rear axle leaf spring, which is provided with a main positioning mechanism and a leaf spring positioning member. The main positioning mechanism is used for the vertical centering positioning of the rear axle axis and its first central axis, and the leaf spring positioning member is used for the positioning of the leaf spring. The leaf spring positioning member and the main positioning mechanism are also centrally assembled, and the leaf spring positioning member corresponding to the main positioning mechanism includes at least two leaf spring positioning members, which can ensure the parallel state of the leaf spring and the first central axis through multi-point positioning. The rear axle and the leaf spring are respectively centrally positioned by the main positioning mechanism and the leaf spring positioning member. Combined with the central positioning of the main positioning mechanism and the leaf spring positioning member, the alignment posture limit of the rear axle and the leaf spring can be guaranteed, and the shaking during the jacking machine operation can be avoided. Interference with the positioning posture of the rear axle and the leaf spring, ensuring assembly accuracy, reducing the rework rate, improving production efficiency, and reducing production costs.

[0030] Specifically, see Figure 1 , shown is a schematic diagram of the main structure of the positioning tooling based on the rear axle leaf spring positioning in the embodiment of the utility model, which mainly includes a main positioning mechanism 100 and a leaf spring positioning member 200. The main positioning mechanism 100 is used for the centering positioning of the rear axle, and the leaf spring positioning member 200 is used for positioning the leaf spring, and the leaf spring positioning member 200 can be centrally positioned on the main positioning mechanism 100, so that the centering positioning of the leaf spring and the rear axle can be achieved through the centering matching of the leaf spring positioning member 200 and the main positioning mechanism 100.

[0031] The main positioning mechanism 100 includes a base plate 101, and a first limiting rod 110, a second limiting rod 121 and a positioning guide plate 130 fixedly arranged on the base plate 101. Two first limiting rods 110 are arranged along the first central axis of the base plate 101, and are respectively extended outwards to be used for the installation and positioning of the leaf spring positioning member 200. The positioning guide plate 130 is arranged on the first central axis to position the flange of the rear axle main reducer. Two second limiting rods 121 are symmetrically arranged on both sides of the first central axis to limit the left and right half-axle housings of the rear axle. Through the limiting of the second limiting rod 121 and the positioning guide plate 130, the rear axle can be centrally positioned in the main positioning mechanism 100.

[0032] The leaf spring positioning member 200 includes an assembly rod 210, and a first clamping plate 221 and a second clamping plate 222 arranged on the assembly rod 210. The second clamping plate 222 is arranged at both ends of the assembly rod 210, and the first clamping plate 221 is arranged at the center position between the two second clamping plates 222. The second clamping plate 222 is used for positioning the leaf spring. When the first clamping plate 221 is engaged and positioned with the first limiting rod 110, the two second clamping plates 222 can be symmetrically distributed relative to the first central axis, so that the second clamping plate 222 can be aligned with the main positioning mechanism.

[0033] The distance between the second clamping plate 222 and the first clamping plate 221 can be determined according to the distance between the leaf spring and the center line of the rear axle. After the rear axle is centered and positioned on the main positioning mechanism 100, the two leaf spring positioning members 200 are positioned on the two first limit rods 110 of the main positioning mechanism 100, and then the leaf spring is installed with the second clamping plate 222 as the limit reference. This can ensure the alignment of the leaf springs on both sides with the rear axle and guarantee the installation accuracy.

[0034] To facilitate the installation of the positioning guide plate 130, in the present embodiment, a first mounting seat 131 is fixedly provided on the base plate 101, and the positioning guide plate 130 can be flipped and movably provided on the first mounting seat 131. The positioning guide plate 130 includes a bottom panel and a U-shaped side panel (consisting of three side panels), and the closed side of the U-shaped side panel is rotatably connected to the first mounting seat 131.

[0035] The main positioning mechanism 100 is fixed at the corresponding position of the rear axle installation station. When the rear axle is placed on the frame support frame, the rear axle main reducer flange can drive the positioning guide plate 130 to flip and stand up, so that the two side plates of the U-shaped side panel can contact the two sides of the rear axle main reducer flange. Through the limiting effect, the rear axle main reducer flange can be guided to align with the positioning guide plate 130. At the same time, the two second limiting rods 121 are synchronously erected to synchronously limit the left and right half-axle housings of the rear axle, which can effectively ensure the centering of the rear axle and the main positioning mechanism 100 as a whole.

[0036] In order to avoid interference of the leaf spring installation with the wiring that has not been assembled and fixed during the rear axle assembly process, in the present embodiment, the two side panels of the U-shaped side panel are convex-shaped panels, so that when the closed side panel of the U-shaped side panel is pressed down by the rear axle main reducer flange and flipped, the protruding portion of the convex-shaped panel can form a limiting area below after the positioning guide plate 130 is erected, so that the wiring can be clamped and limited between the positioning guide plate 130 and the rear axle main reducer flange.

[0037] To facilitate the movement of the second limiting rod 121, in the present embodiment, a second mounting seat 122 is also fixedly provided on the base plate 101, and the second limiting rod 121 is rotatably provided on the second mounting seat 122, and the rotation direction is consistent with the extension direction of the first central axis, so that the second limiting rod 121 can rotate relative to the second mounting seat 122. When limiting is required, the second limiting rod 121 is erected, and after the leaf spring is installed, the second limiting rod 121 is lowered so that the rear axle can be moved away.

[0038] The second mounting seat 122 includes a vertical mounting groove, and the two first side plates opposite to the vertical mounting groove are extended upward to set a rotating shaft on the extended part of the first side plate, and the cross-sectional size of the vertical mounting groove is consistent with the size of the second limiting rod 121, so that the second limiting rod 121 can be embedded and fixed in the vertical mounting groove; the root side wall of the second limiting rod 121 is provided with a strip hole to be movably connected with the rotating shaft through the strip hole, and the extension direction of the strip hole is consistent with the extension direction of the second limiting rod, so that the second limiting rod 121 can be pulled out or inserted relative to the vertical mounting groove of the second mounting seat 122 through the cooperation between the strip hole and the rotating shaft.

[0039] A dumping opening is provided at the front top of the vertical mounting groove, and the width of the dumping opening is greater than or equal to the width of the second limiting rod 121, so that the second limiting rod 121 can be dumped forward after being pulled out of the vertical mounting groove of the second mounting seat 122. When the second limiting rod 121 is fully inserted into the vertical mounting groove of the second mounting seat 122, it is in a vertical standing state, and the two second mounting seats 122 have the same structure, which can ensure that the two second limiting rods 121 are in a centered state when standing up, and ensure the limiting of the rear axle, so that the axial direction of the rear axle is perpendicular to the first central axis, that is, the rear axle is kept horizontally parallel to the frame.

[0040] To ensure the structural strength of the second mounting seat 122, in this embodiment, the bottom plate of the vertical mounting slot extends horizontally outward, and reinforcing ribs are provided between the outer wall of the first side plate and the bottom plate of the slot, which can improve the mechanical structural strength of the second mounting seat 122, thereby ensuring the posture maintenance ability of the second limiting rod 121 in the upright state, and ensuring the reliability of the limitation of the rear axle.

[0041] To facilitate processing, in the present embodiment, one of the first limit rods 110 is fixedly disposed on the first mounting seat 131, that is, the first mounting seat 131 and a first limit rod 110 are integrally formed, which is convenient for processing. When the first mounting seat 131 is installed and fixed to the base plate 101, the centering assembly requirements of the first limit rod 110 and the positioning guide plate 130 can be realized at the same time, thereby improving the centering accuracy.

[0042] Specifically, the positioning fixture of this embodiment and the positioning state of the rear axle are as follows: Figure 4 As shown, in a top view, two second limit rods 121 stand upright, and are used to limit the two half-axles of the rear axle 50, so that the rear axle 50 is horizontally parallel to the positioning fixture, and at the same time, the main reducer flange at the middle position of the rear axle 50 is aligned with the positioning guide plate 130, which can ensure that the rear axle 50 is aligned with the positioning fixture. After the centering is completed, the leaf spring 60 can be positioned at the leaf spring installation position of the rear axle 50 with the two leaf spring positioning members 200 as limits, avoiding the displacement of the leaf spring 60, that is, the positioning fixture of the utility model can effectively realize the alignment and positioning of the leaf spring and the rear axle during the installation process, thereby improving the installation efficiency of the leaf spring.

[0043] Since the installation of the leaf spring also needs to take into account the installation of the rear axle and the frame, the installation of the leaf spring is generally carried out simultaneously with the process of installing the rear axle to the frame. Correspondingly, in this embodiment, Figure 2 and Figure 3 ( Figure 3 for Figure 2 As shown in the partial enlarged schematic diagram of the area A in the middle, the positioning tool also includes a frame limiting mechanism, which includes a mounting block 311 fixedly set on the outer side wall of the frame support frame 300, and a lever 312 set on the mounting block 311, the lever 312 is movably connected to the mounting block 311 through a hinge, and the movable surface of the lever 312 is the side surface of the frame support frame 300, so that the lever 312 can be erected or lowered in the longitudinal direction of the frame support frame 300. When the lever 312 is erected, the frame can be restricted between the two levers 312, reducing the risk of the frame overturning due to lateral deviation. After the rear axle and the leaf spring are installed, the lever 312 is lowered to facilitate the removal of the frame.

[0044] In order to facilitate the positioning of the leaf spring during the process of conveying it to the installation position, in this embodiment, it also includes a leaf spring guide member 320. The leaf spring guide member 320 is fixedly arranged on the frame support frame 300. A guide path is opened on the top of the leaf spring guide member 320. The extension direction of the guide path is consistent with the longitudinal direction of the frame support frame 300. The width of the guide path gradually decreases from top to bottom. When the leaf spring is conveyed to the leaf spring positioning member 200, after passing through the guide path, the posture of the leaf spring can be preliminarily guaranteed to be aligned with the second clamping plate 222 of the leaf spring positioning member 200, so as to avoid adjusting the posture of the leaf spring, save labor time and improve production efficiency.

[0045] Among them, Figure 4 As shown, the transverse dimension of the bottom plate 101 of the main positioning mechanism 100 is smaller than the spacing between the two supporting longitudinal beams 301 of the frame support frame 300, and the main positioning mechanism 100 can be placed and fixed in the space between the two supporting longitudinal beams 301 of the frame support frame 300. In production, the frame is first firmly placed on the frame support frame 300. At this time, there is no other shielding structure. The frame can be placed over the leaf spring guide 320, and the frame longitudinal beam is placed parallel to the supporting longitudinal beam 301 to ensure stability; then, the rear axle 50 is transferred to the frame with the main positioning mechanism 100 as a limit reference, and then the two leaf spring positioning members 200 are installed on the main positioning mechanism 100. When the leaf spring 60 is put on the line, the leaf spring guide 320 on the supporting longitudinal beam 301 is used as a guide to be parallel to the supporting longitudinal beam 301, and then it is transported to the leaf spring installation position of the rear axle, so as to facilitate alignment with the second clamping plate 222 of the leaf spring positioning member 200.

[0046] After the leaf spring is installed, the leaf spring positioning piece 200 is removed, and the frame support frame 300 and the crossbeam limiter in the positioning tooling can be eliminated, so that the longitudinal direction can be unobstructed and can be used for the installation and use of conveying devices such as ground rails, facilitating the transportation of the frame and the rear axle.

[0047] The utility model also provides a production line, including the above-mentioned positioning tooling based on rear axle leaf spring positioning, which can effectively realize the centering installation of the leaf spring and the rear axle to the frame, improve the centering accuracy, reduce the rework cost caused by the centering error, and can reduce calibration operations and improve production efficiency.

[0048] The positioning tooling based on the rear axle leaf spring positioning provided by the utility model includes a main positioning mechanism and a leaf spring positioning member. The main positioning mechanism is used for the vertical centering positioning of the rear axle axis and its first central axis. The leaf spring positioning member is used for positioning the leaf spring, and the leaf spring positioning member and the main positioning mechanism are also centrally assembled. The leaf spring positioning member corresponding to the main positioning mechanism includes at least two, and the parallel state of the leaf spring and the first central axis can be ensured through multi-point positioning. The rear axle and the leaf spring are respectively centrally positioned by the main positioning mechanism and the leaf spring positioning member. Combined with the central positioning of the main positioning mechanism and the leaf spring positioning member, the alignment posture limit of the rear axle and the leaf spring can be ensured, and the shaking during the jacking machine operation can be avoided. Interference with the positioning posture of the rear axle and the leaf spring, ensuring assembly accuracy, reducing the rework rate, improving production efficiency, and reducing production costs.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0050] The above-mentioned embodiments only express several specific implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A positioning tool based on rear axle leaf spring positioning, characterized in that: include: Main positioning mechanism and leaf spring positioning member, wherein, The main positioning mechanism includes a base plate, and a first limiting rod, a second limiting rod and a positioning guide plate fixedly arranged on the base plate, wherein two first limiting rods are arranged along the first central axis of the base plate and are respectively extended outwardly, the positioning guide plate is arranged on the first central axis and is used for positioning the flange of the rear axle main reducer, and two second limiting rods are symmetrically arranged on both sides of the first central axis and are used for limiting the left and right half-axle housings of the rear axle; The leaf spring positioning member includes an assembly rod, and a first clamping plate and a second clamping plate arranged on the assembly rod, wherein the second clamping plate is arranged at both ends of the assembly rod, and the first clamping plate is arranged at the center position between the two second clamping plates, and the second clamping plate is used for positioning the leaf spring, so that the leaf spring aligned with the second clamping plate is aligned with the main positioning mechanism through the engagement and positioning of the first clamping plate and the first limiting rod, wherein the leaf spring positioning members corresponding to the main positioning mechanism include at least two.

2. The positioning tool based on rear axle leaf spring positioning according to claim 1, characterized in that: A first mounting seat is also fixedly arranged on the bottom plate, and the positioning guide plate can be flipped and movably arranged on the first mounting seat. The positioning guide plate includes a bottom panel and a U-shaped side panel, and the closed side of the U-shaped side panel is rotatably and movably connected to the first mounting seat.

3. The positioning tool based on rear axle leaf spring positioning according to claim 2, characterized in that: The two side panels of the U-shaped side panel are convex-shaped panels.

4. The positioning tool based on rear axle leaf spring positioning according to claim 1, characterized in that: The bottom plate is also fixedly provided with a second mounting seat, and the second limiting rod is rotatably provided on the second mounting seat, and the rotation direction is consistent with the extending direction of the first central axis, so that the second limiting rod can be erected and put down.

5. The positioning tool based on rear axle leaf spring positioning according to claim 4 is characterized in that: The second mounting seat comprises a vertical mounting groove, and two first side plates opposite to the vertical mounting groove are arranged to extend upward, so that a rotating shaft is arranged on the extended portion of the first side plate, and the cross-sectional size of the vertical mounting groove is consistent with the size of the second limiting rod, so that the second limiting rod can be embedded and fixed in the vertical mounting groove; A strip hole is provided on the root side wall of the second limiting rod so as to be movably connected with the rotating shaft through the strip hole, and the extending direction of the strip hole is consistent with the extending direction of the second limiting rod; A pouring opening is provided at the front top of the vertical installation groove, and the width of the pouring opening is greater than or equal to the width of the second limiting rod.

6. The positioning tool based on rear axle leaf spring positioning according to claim 5, characterized in that: The groove bottom plate of the vertical installation groove extends horizontally outward, and reinforcing ribs are arranged between the outer wall of the first side plate and the groove bottom plate.

7. The positioning tool based on rear axle leaf spring positioning according to claim 2, characterized in that: One of the first limiting rods is fixedly disposed on the first mounting seat.

8. The positioning tool based on rear axle leaf spring positioning according to claim 1, characterized in that: It also includes a frame limiting mechanism, which includes a mounting block fixedly mounted on the outer side wall of the frame support frame, and a shifting rod arranged on the mounting block, the shifting rod is movably connected to the mounting block through a hinge, and the movable surface of the shifting rod is the side surface of the frame support frame.

9. The positioning tool based on rear axle leaf spring positioning according to claim 1, characterized in that: It also includes a leaf spring guide, which is fixed on the frame support frame. A guide path is opened on the top of the leaf spring guide. The extension direction of the guide path is consistent with the longitudinal direction of the frame support frame. The width of the guide path gradually decreases from top to bottom.

10. A production line, characterized in that: It comprises the positioning tool based on rear axle leaf spring positioning as described in any one of claims 1 to 9.

Images