An assembly positioning fixture for a forklift truck tailgate assembly

Abstract

This utility model relates to the field of forklift technology and discloses an assembly and positioning fixture for a forklift tail carriage assembly. It includes a base, on which a slit positioning assembly is fixed. The slit positioning assembly includes a positioning bracket and horizontally arranged, mutually perpendicular transverse slit positioning blocks and longitudinal slit positioning blocks. The end of the transverse slit positioning block furthest from the positioning bracket is an abutment end, used to abut against the side plate of the tail carriage assembly. The end of the longitudinal slit positioning block furthest from the positioning bracket is also an abutment end, abutting against the front or rear plate of the tail carriage assembly. A steering axle positioning assembly is fixed to one side of the base. The steering axle positioning assembly includes a steering axle positioning bracket and a positioning pin. The axis of the positioning pin is collinear with the axis of the steering axle mounting hole on the tail carriage assembly. This utility model, through the coordinated operation of the slit positioning assembly and the steering axle positioning assembly, quickly and accurately positions and fixes the various plates of the tail carriage assembly, ensuring the coaxiality of the slit dimensions and the steering axle mounting holes.

Description

Technical Field

[0001] This utility model relates to the field of forklift technology, specifically to an assembly and positioning fixture for a forklift tailstock assembly. Background Technology

[0002] As an industrial vehicle with good operational flexibility in narrow passages, the tail frame assembly of the passenger-mounted three-way forklift is an important structural component that supports key components such as the steering axle and tilting cylinder. Its manufacturing precision directly affects the overall vehicle's operating performance and safety.

[0003] Currently, the tailstock assembly of existing rider-mounted three-way forklift models generally uses the traditional marking and positioning method during production and assembly. This method relies on the technical experience of operators, manually marking lines to determine the approximate installation position of each component. It lacks effective fixing and limiting methods, making it difficult to accurately control the relative positions of parts during assembly. In particular, it is difficult to ensure the dimensional accuracy of the gaps between the left and right side plates and the front and rear plates of the tailstock assembly, as well as the coaxiality of the steering axle mounting holes. This results in poor product quality control, affects assembly efficiency, and hinders efficient production to meet customer needs.

[0004] Therefore, there is an urgent need for an assembly and positioning fixture for forklift tail carriage assemblies that can quickly and accurately position and fix the various plates of the tail carriage assembly, ensuring the spacing between the various plates of the tail carriage assembly and the coaxiality of the steering axle mounting holes on the tail carriage assembly, thereby improving production efficiency and product quality stability. Utility Model Content

[0005] The purpose of this utility model is to provide an assembly and positioning fixture for a forklift tailstock assembly, so as to solve the problems mentioned in the background art and improve the assembly efficiency of the tailstock assembly while ensuring the quality of the tailstock assembly.

[0006] To achieve the above objectives, this utility model provides the following technical solution: An assembly and positioning fixture for a forklift tailstock assembly, comprising: Base; A gap-opening positioning assembly, fixedly mounted on the upper surface of the base, includes: Positioning bracket; A transverse opening positioning block is horizontally set on the positioning bracket. The end of the transverse opening positioning block away from the positioning bracket is the abutment end, which is used to abut against the side plate of the tail frame assembly. A longitudinal opening positioning block is horizontally set on the positioning bracket and perpendicular to the transverse opening positioning block. The end of the longitudinal opening positioning block away from the positioning bracket is the abutment end, which is used to abut the front or rear plate of the tail frame assembly. A steering axle seat positioning assembly, fixedly mounted on one side of the upper surface of the base, includes: Steering axle mounting bracket; The positioning pin is fixed on the steering axle positioning bracket, and its axis is collinear with the axis of the steering axle mounting hole on the tailstock assembly.

[0007] As a further solution of this utility model: in order to ensure that the opening size between the left and right side plates and the front and rear plates of the tailstock assembly meets the requirements and avoids dimensional deviations, the lateral opening positioning blocks are configured in multiple ways, and the horizontal distance between the abutting ends of two corresponding lateral opening positioning blocks matches the opening size between the left and right side plates of the tailstock assembly. The longitudinal opening positioning blocks are configured in multiple ways, and the horizontal distance between the abutting ends of two corresponding longitudinal opening positioning blocks matches the opening size between the front and rear plates of the tailstock assembly.

[0008] As a further embodiment of this utility model: to facilitate compatible assembly by replacing different sizes of transverse and longitudinal opening positioning blocks according to different forklift models, the end of the transverse and longitudinal opening positioning blocks near the positioning bracket is fixed to the positioning bracket by a fixing pin, and the bottom edge is limited by a limiting pin fixed to the positioning bracket.

[0009] As a further embodiment of this utility model: in order to provide vertical support for the top plate of the tailstock assembly and ensure the flatness and height of the top plate, the opening positioning assembly further includes a height pin fixed on the top plate of the positioning bracket for supporting the top plate of the tailstock assembly.

[0010] As a further embodiment of this utility model: to provide bottom support for the steering axle seat and ensure the accuracy of the steering axle seat installation height, the steering axle seat positioning assembly further includes a steering axle seat height limiting pin. The steering axle seat height limiting pin is fixed on the base and located between the steering axle seat positioning assembly and the opening positioning assembly, and is used to support the bottom of the steering axle seat.

[0011] As a further embodiment of this utility model: to prevent the tailstock assembly plates from shifting during subsequent assembly, a clamping device is also included. The clamping device is fixed on the base and configured to clamp multiple left and right side plates and front and rear plates of the tailstock assembly respectively.

[0012] As a further embodiment of this utility model: to ensure the stability of the tailstock assembly on the tooling and the consistency of its overall height, a front pad and a rear pad are also fixed on the base to support the bottom edge of the tailstock assembly.

[0013] As a further embodiment of this utility model: to ensure the installation level of the tailstock assembly side plates and the overall symmetry of the tailstock assembly, a side plate height limiting pin is also included, which is fixed on the base. A plurality of the side plate height limiting pins are symmetrically arranged on the left and right sides of the opening positioning assembly to support the bottom ends of the left and right side plates of the tailstock assembly.

[0014] As a further solution of this utility model: in order to reduce the scratches on the surface of the plate when the abutting end of the transverse and longitudinal opening positioning block comes into contact with the tail frame assembly plate, the end faces of the abutting ends of the transverse and longitudinal opening positioning blocks are both arc surfaces.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This utility model features a novel structure. Through the transverse and longitudinal opening positioning blocks of the opening positioning assembly, it ensures rapid and precise positioning of each panel of the tailstock assembly, while simultaneously ensuring that the opening dimensions between the panels meet requirements, eliminating errors from scribing assembly and manual positioning. The clamping device ensures that the panels of the tailstock assembly do not shift during assembly. The steering axle mounting assembly and the opening positioning assembly work together to position the steering axle mounted on the tailstock assembly, ensuring coaxiality with the steering axle mounting holes on the tailstock assembly. This prevents misalignment of the holes when the steering axle is installed on the tailstock assembly, thus avoiding installation jamming and improving the product quality consistency and assembly efficiency of the forklift tailstock assembly.

[0016] The tailstock assembly, steering axle seat, and bracing device are all existing components. This application only uses them in this application and does not involve any improvement to their structure or working principle. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the opening and positioning assembly of this utility model; Figure 3 This is a schematic diagram of the steering axle positioning assembly of this utility model; Figure 4 This is a schematic diagram of the clamping device of this utility model; Figure 5 This is an assembly drawing of the tailstock assembly and tooling of this utility model; Figure 6 for Figure 5 Side sectional view; Figure 7 for Figure 5 Front sectional view; Figure 8 This is a top view of the present invention; Figure 9This is a structural schematic diagram of the tailstock assembly of this utility model; In the diagram: 1-base, 11-front pad, 12-rear pad, 13-side plate height limit pin, 2-opening positioning assembly, 21-positioning bracket, 22-lateral opening positioning block, 23-longitudinal opening positioning block, 24-fixed pin, 25-limiting pin, 26-height pin, 3-steering axle seat positioning assembly, 31-steering axle seat positioning bracket, 32-positioning pin, 33-steering axle seat height limit pin, 4-clamping device, 5-tail frame assembly, 51-steering axle seat mounting hole. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations.

[0020] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0021] Please see Figure 1-9 In this embodiment of the present invention, an assembly and positioning fixture for a forklift tailstock assembly includes a base 1. In this embodiment, the base 1 specifically consists of a base plate and four channel steels welded to the bottom surface of the base plate. Figure 1 and Figure 2As shown, a slotting positioning assembly 2 is fixedly connected to the upper surface of the base plate 1. The slotting positioning assembly 2 includes a positioning bracket 21, which is welded to the center of the upper surface of the base 1. Figure 2 As shown, the positioning bracket 21 is a frame structure consisting of a top plate, a bottom plate, left and right side plates, and stiffening plates that vertically connect the top plate, bottom plate, and left and right side plates. A transverse opening positioning block 22 and a longitudinal opening positioning block 23 are horizontally arranged on the positioning bracket 21. The longitudinal opening positioning block 23 is fixedly mounted on the side plate of the positioning bracket 21, and the transverse opening positioning block 22 is fixedly mounted on the stiffening plate of the positioning bracket 21, making the transverse opening positioning blocks 22 perpendicular to each other. This allows them to abut against the front and rear plates and left and right side plates of the tailstock assembly 5, respectively, while ensuring the verticality of the front and rear plates and left and right side plates of the tailstock assembly 5. The ends of the transverse opening positioning block 22 and the longitudinal opening positioning block 23 that are away from the positioning bracket 21 are abutting ends, which are used to abut the side plate, front plate and rear plate of the tail frame assembly 5 respectively. The end faces of the abutting ends of the transverse opening positioning block 22 and the longitudinal opening positioning block 23 are both arc surfaces to prevent the abutting ends from scratching the plate surfaces when they come into contact with the various plate surfaces of the tail frame assembly 5, thus ensuring product quality.

[0022] The transverse opening positioning block 22 and the longitudinal opening positioning block 23 are fixedly connected to the positioning bracket 21 at their ends near the positioning bracket 21 by a fixing pin 24. The fixing pin 24 is inserted into a pin hole on the plate of the positioning bracket 21, allowing for quick replacement of different sizes of transverse opening positioning blocks 22 and longitudinal opening positioning blocks 23 by inserting and removing the fixing pin 24 according to different forklift types. A limit pin 25 is inserted into the positioning bracket 21 below the bottom edge of the transverse opening positioning block 22 and the longitudinal opening positioning block 23 to limit the displacement of the contact ends. Multiple transverse opening positioning blocks 22 and longitudinal opening positioning blocks 23 can be configured, wherein the contact ends of two corresponding transverse opening positioning blocks 22 or two corresponding longitudinal opening positioning blocks 23 face opposite directions, and... Figure 6 and Figure 7 As shown, the horizontal distance between the abutting ends of the two corresponding transverse opening positioning blocks 22 matches the opening size between the left and right side plates of the tailstock assembly 5, and the horizontal distance between the abutting ends of the two corresponding longitudinal opening positioning blocks 23 matches the opening size between the front and rear plates of the tailstock assembly 5, thereby ensuring that the opening size of the tailstock assembly 5 meets the requirements. A height pin 26 is fixedly connected to the top plate of the positioning bracket 21. In this embodiment, four height pins 26 are specifically set and welded to the four corners of the upper surface of the top plate of the positioning bracket 21. The four height pins 26 have the same height, supporting the top plate of the tailstock assembly 5 while ensuring the height and flatness of the top plate of the tailstock assembly 5.

[0023] like Figure 1 and Figure 8As shown, a side plate height limiting pin 13 is welded to the upper surface of the base 1. Specifically, four side plate height limiting pins 13 are arranged symmetrically on the left and right sides of the opening and positioning assembly 2, in pairs. The bottom of the left and right side plates of the tailstock assembly 5 are provided with height positioning and support to ensure the installation level and overall symmetry of the tailstock assembly 5. The upper surface of the base 1 is also threaded with a front pad 11 and a rear pad 12. Specifically, two front pads 11 are provided and located on the side of the gear shift positioning assembly 2 closest to the steering axle seat positioning assembly 3. Specifically, two rear pads 12 are provided and located on the side of the gear shift positioning assembly 2 furthest from the steering axle seat positioning assembly 3. Provides support for the bottom edge of the tail carriage assembly 5, ensuring that the overall height of the tail carriage assembly 5 is consistent and that it can be stably placed on the gear shift positioning assembly 2.

[0024] like Figure 3 and Figure 5 As shown, a steering axle seat positioning assembly 3 is also fixedly installed on the base 1. The steering axle seat positioning assembly 3 includes a steering axle seat positioning bracket 31, which is welded to one side of the upper surface of the base 1 and located at the centerline of the base 1. A positioning pin 32 is passed through and fixed on the steering axle seat positioning bracket 31. The axial direction of the positioning pin 32 is perpendicular to the length direction of the transverse opening positioning block 22, and the axis of the positioning pin 32 is collinear with the axis of the steering axle seat mounting hole 51 on the tailstock assembly 5. This is to ensure that the positioning pin 32 and the steering axle seat mounting hole 51 are coaxial. In this embodiment, there are two positioning pins 32, which correspond to the two steering axle seat mounting holes 51 on the tailstock assembly 5, respectively, to ensure that the steering axle is not stuck when installed on the tailstock assembly 5 due to misalignment of the steering axle seat mounting holes 51. A steering axle seat height limiting pin 33 is also welded between the steering axle seat positioning assembly 3 and the opening positioning assembly 2 on the base 1, providing bottom support for the steering axle seat. In this embodiment, three steering axle seat height limiting pins 33 are specifically configured to work in conjunction with the positioning pins 32 to ensure that the final installation position of the steering axle seat meets the requirements.

[0025] like Figure 4 and Figure 5 As shown, a clamping device 4 is inserted into and welded to the upper surface of the base 1, which is used to clamp the left and right side plates and the front and rear plates of the tail frame assembly 5 against the opening positioning assembly 2. In this embodiment, the clamping device 4 is specifically configured as eight, and they are located in pairs at the left, right, front and rear positions of the opening positioning assembly 2.

[0026] This utility model features a novel structure and stable operation. In use, the base 1 of the assembly positioning fixture is first fixed to a stable workbench. Then, the main components of the tailstock assembly 5, including the bottom plate, left side plate, right side plate, front plate, and rear plate, are hoisted and placed one by one into the assembly positioning fixture, so that the bottom of the tailstock assembly 5 initially rests on the front pad 11, rear pad 12, or side plate height limiting pin 13. Next, initial positioning is performed by pushing each plate of the tailstock assembly 5 until it contacts the abutting ends of the transverse and longitudinal opening positioning blocks 22 and 23, thus limiting the transverse and longitudinal opening dimensions of the tailstock assembly 5 to the required range. Finally, the tailstock assembly is pressed down. Assemble 5, ensuring that the bottom of the front and rear plates are fully supported by the front pads 11 and rear pads 12, and the bottom of the left and right side plates are supported by the side plate height limiting pins 13, thus completing the height positioning and support. Place the top plate of the tailstock assembly 5 on the height pin 26 on the top of the opening positioning assembly 2 to ensure the installation height and flatness of the top plate. Place the steering axle seat in its installation position, so that the bottom of the steering axle seat rests on the steering axle seat height limiting pin 33, initially determining the installation height of the steering axle seat. Align the steering axle seat mounting holes on the tailstock assembly 5 and fit them into the positioning pins 32 of the steering axle seat positioning assembly 3 to ensure the coaxiality requirements during final assembly with the steering axle seat. After all components are accurately positioned, tighten the screws of each clamping device 4 so that their ends firmly abut against the corresponding plates (left and right side plates, front and rear plates) of the tailstock assembly 5, applying sufficient clamping force to eliminate all gaps and prevent plate displacement during welding. After all clamping devices 4 are confirmed to be in place, welding or other assembly operations can be performed on the positioned tailstock assembly 5. Since all critical dimensions are guaranteed by this assembly positioning fixture, after welding, the critical dimensions of the tailstock assembly 5 (such as opening size, concentricity, height, etc.) all meet the design requirements. After welding is completed and the tailstock assembly 5 has cooled, all clamping devices 4 are released in sequence, and the formed tailstock assembly 5 is lifted off the assembly positioning fixture.

[0027] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0028] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. An assembly positioning fixture for a fork truck rear carriage assembly, comprising: include: Base (1); The opening and positioning assembly (2) is fixed to the upper surface of the base (1) and includes: Positioning bracket (21); A transverse opening positioning block (22) is horizontally set on the positioning bracket (21). The end of the transverse opening positioning block (22) away from the positioning bracket (21) is the abutting end, which is used to abut the side plate of the tail frame assembly. The longitudinal opening positioning block (23) is horizontally set on the positioning bracket (21) and perpendicular to the transverse opening positioning block (22). The end of the longitudinal opening positioning block (23) away from the positioning bracket (21) is the abutting end, which is used to abut the front or rear plate of the tail frame assembly. The steering axle positioning assembly (3) is fixed to one side of the upper surface of the base (1), and includes: Steering axle positioning bracket (31); The positioning pin (32) is fixed on the steering axle positioning bracket (31), and its axis is collinear with the axis of the steering axle mounting hole on the tailstock assembly.

2. The assembly positioning fixture of claim 1, wherein: The lateral opening positioning blocks (22) are configured in multiple ways, and the horizontal distance between the abutting ends of two corresponding lateral opening positioning blocks (22) matches the opening size between the left and right side plates of the tail frame assembly. The longitudinal opening positioning blocks (23) are configured in multiple ways, and the horizontal distance between the abutting ends of two corresponding longitudinal opening positioning blocks (23) matches the opening size between the front and rear plates of the tail frame assembly.

3. The assembly positioning fixture according to claim 1, characterized in that: The ends of the transverse opening positioning block (22) and the longitudinal opening positioning block (23) near the positioning bracket (21) are fixed to the positioning bracket (21) by a fixing pin (24), and the bottom edges are limited by a limiting pin (25) fixed to the positioning bracket (21).

4. The assembly positioning fixture according to claim 1, characterized in that: The opening positioning assembly (2) also includes a height pin (26) fixed on the top plate of the positioning bracket (21) for supporting the top plate of the tailstock assembly.

5. The assembly positioning fixture according to claim 1, characterized in that: The steering axle positioning assembly (3) also includes a steering axle height limiting pin (33), which is fixed on the base (1) and located between the steering axle positioning assembly (3) and the opening positioning assembly (2) to support the bottom of the steering axle.

6. The assembly positioning fixture according to claim 1, characterized in that: It also includes a clamping device (4), which is fixed on the base (1) and configured to clamp multiple left and right side plates and front and rear plates of the tailstock assembly respectively.

7. The assembly positioning fixture according to claim 1, characterized in that: It also includes a front pad (11) and a rear pad (12) fixed on the base for supporting the bottom edge of the tailstock assembly.

8. The assembly positioning fixture according to claim 1, characterized in that: It also includes side plate height limiting pins (13) fixed on the base (1). Multiple side plate height limiting pins (13) are symmetrically arranged on the left and right sides of the opening positioning assembly (2) to support the bottom of the left and right side plates of the tail frame assembly.

9. The assembly positioning fixture according to claim 1, characterized in that: The end faces of the contact ends of the transverse opening positioning block (22) and the longitudinal opening positioning block (23) are both arc surfaces.

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