A positioning clamp for a subframe of an automobile chassis
Patent Information
- Application Number
- CN202522308504.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2035-10-31
AI Technical Summary
[0012] The beneficial effects of this utility model are: It has a simple structure, is easy to operate, provides accurate positioning, and has a short fixture manufacturing cycle, enabling rapid response to prototype production needs and meeting vehicle assembly schedules. The fixture manufacturing cost is low, the change cycle is short, and it can readily adapt to product design changes.
Smart Images
Figure CN224765251U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of automotive parts processing technology, specifically relating to an automotive chassis subframe positioning fixture. Background Technology
[0002] The development of a new vehicle model by an OEM mainly includes five core stages: market research and planning, concept design, engineering design, testing and verification, and production preparation. The complete cycle typically takes 30-40 months. The testing and verification stage needs to be completed and conclusions reached in a very short time. The verification cycle for chassis components is relatively long; therefore, shortening the manufacturing cycle of chassis components can shorten the normal verification cycle. The subframe, as a crucial component connecting the body and wheels and supporting the engine and transmission, is very important for vehicles with a unibody design. It isolates road vibrations and noise, resulting in better comfort, and also improves body rigidity. After completing the design of a vehicle model, the OEM will conduct mule testing (test vehicles in the vehicle development stage) to verify the performance parameters of various components; typically, several sets are used.
[0003] Due to the uncertainty of the mule cart verification results, the subframe structural design was modified accordingly. Therefore, it was not possible to directly put it into the formal mass production fixture. Instead, a low-cost, fast-response, simple-designed, and highly applicable method was used to develop prototype fixtures for small-batch, differentiated prototype production. Utility Model Content
[0004] The purpose of this utility model is to provide a positioning fixture for an automotive chassis subframe to solve the problems in the prior art.
[0005] The technical solution adopted by this utility model is: a positioning fixture for a car chassis subframe, including a base plate, a base, a stabilizer bar bracket positioning and clamping mechanism, an upper control arm bracket positioning and clamping mechanism, a body mounting sleeve positioning and clamping mechanism, a main positioning mechanism, a support column, and a steering gear bracket positioning and clamping mechanism. The base plate and the base are connected by bolts, and an adjustable height support column for support is screwed to the middle position of the base plate.
[0006] The stabilizer bar bracket positioning and clamping mechanism is symmetrically arranged and screwed to both sides of the base plate via L-shaped adjusting seats. A stabilizer bar bracket base is welded to its upper end. A clamp fixing bracket for installing a manual clamp and a sliding mechanism guide seat for sliding limit are screwed to the upper end of the stabilizer bar bracket base. The tail end of the stabilizer bar positioning bracket is screwed to the manual clamp, and the front end is fitted with two sets of stabilizer bar positioning pins with clearance. The stabilizer bar positioning bracket reciprocates within the sliding mechanism guide seat, and a guide seat cover is screwed to its upper end.
[0007] The upper swing arm bracket positioning and clamping mechanisms are symmetrically arranged on the base plate beam. The upper swing arm bracket base is fixed to the L-shaped adjusting seat bolts screwed to the base plate. The bottom of the upper swing arm bracket connecting block is screwed to the upper swing arm bracket base through the upper swing arm bracket adjusting shim (not shown in the figure). The upper end is connected to the upper swing arm bracket flipping arm by means of shaft pin and limit pin. The front end of the flipping arm is fitted with the upper swing arm bracket first positioning pin and upper swing arm bracket second positioning pin for positioning the workpiece.
[0008] The vehicle body mounting sleeve positioning and clamping mechanisms are symmetrically arranged below the upper swing arm bracket positioning and clamping mechanism. The base of the vehicle body sleeve positioning mechanism is fixed to the L-shaped adjusting seat bolt screwed to the base plate. The cover of the vehicle body sleeve positioning mechanism is connected to the base of the vehicle body sleeve positioning mechanism through the locking bolt of the vehicle body sleeve positioning mechanism.
[0009] The main positioning mechanism includes an L-shaped adjustment seat, a main positioning mechanism base, a main positioning mechanism adjustment shim (not shown in the figure), and a main positioning pin. The main positioning pin is screwed to the main positioning mechanism base through the main positioning mechanism adjustment shim, and the main positioning mechanism base is connected to the L-shaped adjustment seat by bolts.
[0010] The steering gear bracket positioning and clamping mechanism includes a steering gear bracket base screwed to the base plate, a steering gear bracket positioning seat screwed to the steering gear bracket base via a washer, and a steering gear bracket locking bolt for clamping the workpiece.
[0011] Furthermore, it also includes an L-shaped adjusting seat, which is fixed to the base plate by bolts. The L-shaped adjusting seat is provided with a strip hole and an adjusting bolt. The adjusting bolt is threadedly connected to the part being adjusted, and an adjusting shim is provided between the L-shaped adjusting seat and the part being adjusted.
[0012] The beneficial effects of this utility model are: It has a simple structure, is easy to operate, provides accurate positioning, and has a short fixture manufacturing cycle, enabling rapid response to prototype production needs and meeting vehicle assembly schedules. The fixture manufacturing cost is low, the change cycle is short, and it can readily adapt to product design changes. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the positioning and clamping mechanism of the stabilizer bar bracket of this utility model; Figure 3 This is a schematic diagram of the positioning and clamping mechanism of the upper swing arm bracket of this utility model; Figure 4 This is a schematic diagram of the positioning and clamping mechanism for the vehicle body mounting sleeve of this utility model; Figure 5This is a schematic diagram of the main positioning mechanism of this utility model; Figure 6 This is a schematic diagram of the positioning and clamping mechanism for the steering gear bracket of this utility model.
[0014] Explanation of the numbers in the diagram: 1. Base plate; 2. Stabilizer bar bracket positioning and clamping mechanism; 3. Upper swing arm bracket positioning and clamping mechanism; 4. Body mounting sleeve positioning and clamping mechanism; 5. Main positioning mechanism; 6. Support column; 7. Base; 8. Steering gear bracket positioning and clamping mechanism; 9. Guide seat cover; 10. Clamp fixing bracket; 11. Manual clamp; 12. Stabilizer bar bracket base; 13. L-shaped adjustment seat; 14. Stabilizer bar positioning bracket; 15. Sliding mechanism guide seat; 16. Stabilizer bar positioning pin; 17. Upper swing arm bracket connecting block; 18. Upper swing arm bracket... 19 Upper swing arm bracket adjusting shim, 20 upper swing arm bracket base, 21 shaft pin, 22 limit pin, 23 upper swing arm bracket second positioning pin, 24 upper swing arm bracket first positioning pin, 25 upper swing arm bracket tilting arm, 26 body sleeve positioning mechanism locking bolt, 27 body sleeve positioning mechanism cover, 28 body sleeve positioning mechanism base, 29 main positioning pin, 30 main positioning mechanism base, 30 steering gear bracket locking bolt, 31 steering gear bracket positioning seat, 32 steering gear bracket adjusting shim, 33 steering gear bracket base. Detailed Implementation
[0015] like Figures 1-6 The diagram shows a positioning fixture for an automotive chassis subframe according to the present invention, comprising a base plate 1, a base 7, a stabilizer bar bracket positioning and clamping mechanism 2, an upper control arm bracket positioning and clamping mechanism 3, a body mounting sleeve positioning and clamping mechanism 4, a main positioning mechanism 5, a support column 6, and a steering gear bracket positioning and clamping mechanism 8. The base plate 1 and the base 7 are connected by bolts, and an adjustable-height support column 6 is screwed to the middle of the base plate 1 for support. The height of the support column 6 can be adjusted to accommodate different products. The stabilizer bar bracket positioning and clamping mechanism 2 is symmetrically arranged and screwed to both sides of the base plate 1 via L-shaped adjusting seats 13. A stabilizer bar bracket base 12 is welded to its upper end. A clamp fixing bracket 10 for installing a manual clamp 11 and a sliding mechanism guide seat 15 for sliding limit are screwed to the upper end of the stabilizer bar bracket base 12. The tail end of the stabilizer bar positioning bracket 14 is screwed to the manual clamp 11, and the front end is fitted with two sets of stabilizer bar positioning pins 16 with clearance. The stabilizer bar positioning bracket 14 reciprocates within the sliding mechanism guide seat 15. A guide seat cover 9 is screwed to the upper end. The stabilizer bar positioning bracket 14 moves back and forth along the sliding mechanism guide seat 15 by the release and clamping of the manual clamp 11 to ensure the workpiece position accuracy. The front thread structure of the stabilizer bar positioning pin 16 is connected and locked to the workpiece being positioned, and the middle position is fitted with the stabilizer bar positioning bracket 14 with clearance for sliding positioning. The upper swing arm bracket positioning and clamping mechanisms 3 are symmetrically arranged at both ends of the base plate 1. The upper swing arm bracket base 19 is bolted to the L-shaped adjusting seat 13 screwed to the base plate 1. The bottom of the upper swing arm bracket connecting block 17 is screwed to the upper swing arm bracket base 19 through the upper swing arm bracket adjusting shim 18. The upper end is connected to the upper swing arm bracket flipping arm 24 through the shaft pin 20 and the limiting pin 21. The upper swing arm bracket flipping arm 24 is flipped by the shaft pin 20. When clamped, the limiting pin 21 is inserted to restrict the flipping position to be precisely consistent. The upper swing arm bracket first positioning pin 23 and upper swing arm bracket second positioning pin 22 for positioning the workpiece are inserted into the front end of the upper swing arm bracket flipping arm 24 with clearance fit. The upper swing arm bracket first positioning pin 23 and upper swing arm bracket second positioning pin 22 guide and position the workpiece through the through hole of the upper swing arm bracket flipping arm 24. The vehicle body mounting sleeve positioning and clamping mechanisms 4 are symmetrically arranged below the upper swing arm bracket positioning and clamping mechanism 3. The base 27 of the vehicle body sleeve positioning mechanism is bolted to the L-shaped adjusting seat 13 screwed to the base plate 1. The cover 26 of the vehicle body sleeve positioning mechanism is connected to the base 27 of the vehicle body sleeve positioning mechanism through the locking bolt 25 of the vehicle body sleeve positioning mechanism. The vehicle body sleeve is placed into the upper stop of the base 27 of the vehicle body sleeve positioning mechanism for positioning, and the upper end of the sleeve is clamped by the cover 26 of the vehicle body sleeve positioning mechanism. The main positioning mechanism 5 includes the L-shaped adjusting seat 13, the main positioning mechanism base 29, the main positioning mechanism adjusting shim (not shown in the figure), and the main positioning pin 28. The main positioning pin 28 is screwed to the main positioning mechanism base 29 through the main positioning mechanism adjusting shim, and the main positioning mechanism base 29 and the L-shaped adjusting seat 13 are bolted together. The steering gear bracket positioning and clamping mechanism 8 includes a steering gear bracket base 33 screwed to the base plate 1, a steering gear bracket positioning seat 31 screwed to the steering gear bracket base 33 via a steering gear bracket adjusting shim 32, and a steering gear bracket locking bolt 30 for clamping the workpiece.
[0016] Preferably, the L-shaped adjusting seat is fixed to the base plate by bolts. The L-shaped adjusting seat has a slotted hole and an adjusting bolt. The main body of the adjusting bolt passes through the threaded portion of the slotted hole and is threadedly connected to the threaded hole on the component being adjusted (such as the stabilizer bar bracket base, upper swing arm bracket base, body sleeve positioning mechanism base, main positioning mechanism base, etc.). An adjusting shim is also provided between the L-shaped adjusting seat and the component being adjusted. While the component being adjusted is bolted to the base plate, minor adjustments can be made using the adjusting bolt and adjusting shim on the adjusting seat to ensure accurate positioning.
[0017] In this utility model, a base plate 1 is used as the basic structure, with symmetrically arranged on the left and right sides a stabilizer bar bracket positioning and clamping mechanism 2, an upper swing arm bracket positioning and clamping mechanism 3, a vehicle body mounting sleeve positioning and clamping mechanism 4, a main positioning mechanism 5, a support column 6, and a steering gear bracket positioning and clamping mechanism 8. All positioning and clamping mechanisms are connected to the base plate 1 by screw connections. Different models of product prototypes can be produced through quick mechanism replacement, shortening the prototype manufacturing cycle while keeping costs under control. Its structure is simple, rationally designed, easy to operate, and provides accurate positioning. The fixture processing and manufacturing cycle is short, and it offers good flexibility, quickly responding to prototype production needs and meeting vehicle assembly schedules. It also avoids the high fixture design costs associated with one-time formal fixture changes due to product design changes. The fixture processing and manufacturing cost is low, the change cycle is short, and it can respond to product design changes at any time.
Claims
1. A positioning fixture for an automotive chassis subframe, characterized in that: Includes a base plate (1) with a base (7), and on the base plate (1) are a stabilizer bar bracket positioning and clamping mechanism (2), an upper swing arm bracket positioning and clamping mechanism (3), a body mounting sleeve positioning and clamping mechanism (4), a main positioning mechanism (5), a support column (6) and a steering gear bracket positioning and clamping mechanism (8). The base plate (1) and the base (7) are welded or bolted together, and the height-adjustable support column (6) for support is screwed into the middle position of the base plate (1); The stabilizer bar bracket positioning and clamping mechanism (2) is symmetrically arranged on both sides of the upper part of the base plate (1). The upper end of the stabilizer bar bracket base (12) is welded with a stabilizer bar bracket base (12). The upper end of the stabilizer bar bracket base (12) is screwed with a clamp fixing bracket (10) for installing a manual clamp (11) and a sliding mechanism guide seat (15) for sliding limit. The tail end of the stabilizer bar positioning bracket (14) is screwed with the manual clamp (11), and the front end is fitted with two sets of stabilizer bar positioning pins (16). The stabilizer bar positioning bracket (14) moves back and forth in the sliding mechanism guide seat (15). The upper end of the sliding mechanism guide seat (15) is screwed with a guide seat cover (9). The upper swing arm bracket positioning and clamping mechanism (3) is symmetrically arranged on the base plate (1). The upper swing arm bracket connecting block (17) is bolted to the upper swing arm bracket base (19). The upper end is connected to the upper swing arm bracket flipping arm (24) by means of shaft pin (20) and limit pin (21). The front end of the flipping arm is fitted with the upper swing arm bracket first positioning pin (23) and upper swing arm bracket second positioning pin (22) for positioning the workpiece. The vehicle body mounting sleeve positioning and clamping mechanism (4) is symmetrically arranged below the upper swing arm bracket positioning and clamping mechanism (3). The base (27) of the vehicle body sleeve positioning mechanism is set on the base plate (1) by bolts. The cover (26) of the vehicle body sleeve positioning mechanism is connected to the base (27) of the vehicle body sleeve positioning mechanism by the locking bolt (25). The main positioning mechanism (5) includes a main positioning mechanism base (29), and a main positioning pin (28) is screwed to the main positioning mechanism base (29); The steering gear bracket positioning and clamping mechanism (8) includes a steering gear bracket base (33) screwed to the base plate (1), a steering gear bracket positioning seat (31) screwed to the steering gear bracket base (33), and a steering gear bracket locking bolt (30) for clamping the workpiece.
2. The automotive chassis subframe positioning fixture according to claim 1, characterized in that: It also includes an L-shaped adjustment seat (13), which is fixed to the base plate (1) by bolts. The L-shaped adjustment seat (13) is provided with a strip hole and an adjustment bolt. The adjustment bolt is threadedly connected to the part being adjusted, and an adjustment shim is provided between the L-shaped adjustment seat (13) and the part being adjusted.