A subframe toe bar mounting bracket structure

Abstract

The application discloses a front wheel alignment rod mounting bracket structure, and belongs to the technical field of automobile chassis part manufacturing. The front wheel alignment rod mounting bracket structure comprises a main bracket, an eccentric gear ring assembly, a worm linkage shaft and a front wheel alignment rod mounting bolt. The eccentric gear ring assembly comprises two eccentric gear rings, eccentric distance mounting holes are arranged in the centers of the eccentric gear rings, the worm linkage shaft is transversely arranged on the main bracket and is engaged with the eccentric gear rings, the worm linkage shaft can drive the two eccentric gear rings to rotate in the same direction, the rotational motion is converted into the horizontal displacement of the front wheel alignment rod, the front wheel alignment angle is precisely adjusted, the eccentric gear rings adopt a double-layer split elastic positioning structure of an outer gear ring and an inner gear ring, the precisely adjusted front wheel alignment rod is locked and the vibration is buffered, the main bracket adopts a positioning structure of combined assembly of a transverse bracket and a longitudinal bracket, the flexibility of the front wheel alignment rod assembly is improved, the precision and the structural stability of the front wheel alignment rod assembly are further improved, and the service life of the structure is prolonged.

Description

Technical Field

[0001] This invention relates to the technical field of automobile chassis component manufacturing, and in particular to a subframe front toe bar mounting bracket structure. Background Technology

[0002] The subframe and toe bar of the vehicle chassis are core components of the suspension system. The installation and positioning accuracy of the toe bar directly determines the accuracy of the front wheel toe angle parameter. As a key wheel alignment parameter, the front wheel toe angle directly affects the straight-line stability, steering precision, and tire wear rate during vehicle operation. Therefore, the adjustment accuracy, fixing stability, and structural reliability of the toe bar mounting bracket structure play a crucial role in the overall vehicle driving performance.

[0003] For example, Chinese Patent CN215284973U discloses a front toe-up linkage mounting bracket, a subframe, and an automobile, belonging to the field of automotive technology. The front toe-up linkage mounting bracket has a U-shaped structure with an arc-shaped bottom. Both ends of the bracket are connected to the front crossbeam and longitudinal beam of the subframe, respectively. The opening direction of the bracket is consistent with the length direction of the crossbeam. Using the front toe-up linkage mounting bracket, subframe, and automobile provided in this application can improve the overall strength of the front toe-up linkage mounting and subframe, achieving vehicle lightweighting while improving sound quality.

[0004] However, the aforementioned toe-in mounting bracket has some shortcomings in actual use: 1. In the existing technology, the traditional toe-in bracket uses a U-shaped sheet metal part and an eccentric bolt to adjust the toe angle. The eccentric bolt is limited by the squeezing friction between the bolt and nut and the mounting bracket. However, under bumpy or aggressive driving conditions, the friction of the eccentric bolt is very easy to fail, causing the eccentric bolt to slip and deviate, thus affecting the stability of the toe-in.

[0005] 2. In addition, most existing bracket structures are integrated fixed structures, making it difficult to guarantee the flatness of the bracket mounting surface, the verticality of the side walls, and the dimensional accuracy. Furthermore, the mounting hole positions are fixed without adjustment margins, making it impossible to adapt to the installation of front toe bars and subframes of different specifications, and also impossible to offset processing errors through assembly adjustments. Overall, the controllability of assembly accuracy is poor.

[0006] Therefore, based on the above-stated viewpoints, there is still room for improvement in existing toe-in mounting brackets. Summary of the Invention

[0007] To address the aforementioned problems, this invention provides a subframe front toe bar mounting bracket structure, employing the following technical solution: A subframe front toe bar mounting bracket structure includes a main bracket, which is U-shaped and fixedly connected to the subframe; the main bracket includes a transverse bracket and two longitudinal brackets, and the two side walls of the longitudinal brackets are provided with countersunk circular grooves. An eccentric gear ring assembly includes two eccentric gear rings that are rotatably embedded in countersunk grooves on both side walls. The center of the eccentric gear ring is provided with several eccentric mounting holes and the outer circumference is provided with worm gear teeth. The worm gear linkage shaft is horizontally mounted on the longitudinal support of the main bracket, and the helical teeth at both ends of the shaft mesh with the worm gear teeth of the eccentric gear rings inside the side walls. The toe-up mounting bolt passes through the eccentric mounting hole of the eccentric gear ring and is used to secure the toe-up.

[0008] Preferably, the distance between the center of several eccentric mounting holes on the eccentric gear ring and the axis of the eccentric gear ring is different.

[0009] Preferably, the helical teeth of the worm gear linkage shaft mesh perpendicularly with the worm wheel teeth of the eccentric gear ring.

[0010] Preferably, the longitudinal support of the main support is provided with a bearing seat, and the worm gear linkage shaft is installed on the main support by lateral rotation through the bearing seat.

[0011] Preferably, the eccentric gear ring includes an outer gear ring and an inner gear ring. The outer gear ring is equipped with a plurality of positioning pins at equal intervals along the axial direction. The inner gear ring slides through the positioning pins, and a positioning spring sleeved on the positioning pins is installed between the inner gear ring and the outer gear ring.

[0012] Preferably, the end of the positioning column has a serrated structure, and the longitudinal support of the main bracket has a matching groove corresponding to the serrated structure of the positioning column.

[0013] Preferably, the transverse support has a strip-shaped hole, and the longitudinal support has two mounting holes. The mounting holes of the longitudinal support correspond to the strip-shaped holes of the transverse support, and bolts and nuts are passed through the mounting holes for locking, so that the two longitudinal supports are symmetrically distributed.

[0014] Preferably, the top of the longitudinal support is provided with a limiting tooth, and the side of the transverse support near the limiting tooth is provided with a corresponding limiting groove.

[0015] Preferably, the bolts that lock the transverse and longitudinal supports are provided with locking washers.

[0016] Preferably, the eccentric gear ring rotates synchronously around its axis under the drive of the worm gear linkage shaft, and drives the front lead rod mounting bolt to generate front-to-back horizontal displacement through the eccentric mounting hole.

[0017] In summary, this application includes at least one of the following beneficial technical effects: I. The eccentric gear ring assembly of the present invention, through the worm gear linkage shaft and the worm gear ring forming a worm gear transmission mechanism, can precisely control the adjustment accuracy of the toe rod and prevent the toe rod from shifting. In addition, the eccentric gear ring adopts a double-layer split elastic positioning structure. In the locked state, the sawtooth at the end of the positioning post and the main bracket cooperate with the slot to form a mechanical meshing positioning, so that the circumferential anti-rotation load is borne by the mechanical structure, replacing the traditional single end face friction locking, solving the technical problems of insufficient extrusion friction and the decay of locking performance after wear, and ensuring the stability of the toe rod after adjustment.

[0018] Second, the main bracket of this invention adopts a combined assembly and positioning structure. By adjusting the spacing between the transverse and longitudinal brackets, it can adapt to the installation of front toe rods of different specifications. At the same time, it can also stably ensure the verticality and flatness of the bracket assembly, reduce manual assembly errors, and improve product consistency. In addition, the transverse bracket has strip holes to provide transverse fine adjustment allowance, which can offset the machining tolerance of parts, adapt to different subframe mounting interfaces, and extend the reliable life of the overall bracket. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the main support structure of the present invention.

[0022] Figure 3 This is a schematic diagram of the structure between the main support and the eccentric gear ring assembly of the present invention.

[0023] Figure 4 This is a first-view exploded view of the main support and eccentric gear ring assembly of the present invention.

[0024] Figure 5 This is a second-view exploded view of the main support and eccentric gear ring assembly of the present invention.

[0025] Figure 6 This is a planar schematic diagram of the main support and eccentric gear ring assembly of the present invention.

[0026] Figure 7 This is the present invention. Figure 6 Enlarged view of the local structure at point A in the image.

[0027] Figure 8 This is a schematic diagram of the eccentric gear ring assembly of the present invention.

[0028] Figure 9 This is a first-view structural schematic diagram of the eccentric gear ring of the present invention.

[0029] Figure 10This is a second-view structural schematic diagram of the eccentric gear ring of the present invention.

[0030] Figure 11 This is a third-view structural schematic diagram of the eccentric gear ring of the present invention.

[0031] Figure 12 This is a schematic diagram of the structure of the longitudinal support, mounting holes, and mating slots of the present invention.

[0032] Explanation of reference numerals in the attached figures: 100. Subframe; 1. Main bracket; 2. Countersunk groove; 3. Eccentric gear ring assembly; 30. Eccentric gear ring; 31. Eccentricity mounting hole; 32. Worm gear; 33. Worm linkage shaft; 4. Toe rod mounting bolt; 40. Bearing housing; 300. External gear ring; 301. Internal gear ring; 302. Positioning pin; 303. Positioning spring; 304. Mating groove; 305. Serrated structure; 11. Transverse bracket; 10. Longitudinal bracket; 13. Strip hole; 14. Mounting hole; 16. Limiting groove; 17. Limiting tooth. Detailed Implementation

[0033] The following combination Figures 1-12 This application will be described in further detail.

[0034] This invention provides a subframe toe bar mounting bracket structure, which achieves micro-precision adjustment of the toe angle through a modular linkage adjustment structure. It has multiple protection functions such as reverse self-locking, axial limiting, anti-loosening locking, and precise positioning. At the same time, the overall bracket adopts a combined positioning and locking structure, which comprehensively improves the assembly accuracy and structural stability of the bracket.

[0035] Reference Figure 1 , Figure 2 and Figure 3 As shown, a subframe toe bar mounting bracket structure includes a main bracket 1, an eccentric gear ring assembly 3, a worm gear linkage shaft 33, and a toe bar mounting bolt 4. The left and right side walls of the main bracket 1 are symmetrically provided with countersunk grooves 2 of the same specifications. The opening position, depth, and diameter of the countersunk grooves 2 on both sides are completely corresponding. The countersunk structure of the countersunk grooves 2 can limit the outer end face of the eccentric gear ring 30 to prevent the eccentric gear ring 30 from shifting when rotating.

[0036] First, when installing the toe-in, the toe-in mounting bracket structure is assembled.

[0037] The mounting bracket structure for the toe bar mainly consists of the main bracket 1.

[0038] Reference Figure 3 , Figure 4 and Figure 5As shown, the main support 1 is assembled from a transverse support 11 and two symmetrically arranged longitudinal supports 10. The two longitudinal supports 10 are respectively perpendicularly connected to the two ends of the transverse support 11, forming a U-shaped load-bearing structure, which can provide a symmetrical and stable installation carrier for various subsequent components. The bolts that lock the transverse support 11 and the longitudinal supports 10 are equipped with locking washers.

[0039] The main support 1 has a transverse support 11 with a strip hole 13 on its surface and a longitudinal support 10 with a mounting hole 14. The two mounting holes 14 of the longitudinal support 10 can be precisely aligned with the strip hole 13 of the transverse support. During assembly, the bolt and nut combination structure passes through the corresponding strip hole 13 and mounting hole 14 to lock and fix the two longitudinal supports 10 at both ends of the transverse support 11, thereby ensuring the symmetrical distribution accuracy of the two longitudinal supports 10 and preventing subsequent adjustment deviations caused by assembly offset of the longitudinal supports 10.

[0040] During operation, the operator adjusts the spacing and symmetry of the two longitudinal supports 10 to ensure precise alignment between the two mounting holes 14 on the longitudinal support 10 and the strip holes 13 on the surface of the transverse support 11. A suitable bolt is selected, and after fitting a locking washer to the outside of the bolt shank, the bolt is passed through the mounting holes 14 of the longitudinal support 10 and the strip holes 13 of the transverse support 11. Nuts are then screwed onto the bolt ends, and the nuts are gradually tightened to lock and fix the transverse support 11 and the longitudinal support 10, ensuring that the two longitudinal supports 10 are completely symmetrically distributed. This ultimately forms a stable and precisely sized U-shaped main support 1. The assembled main support 1 is then securely installed on the pre-set assembly position of the vehicle subframe 100 by welding or bolting.

[0041] Looking back Figure 1 As shown, the transverse bracket 11 is welded to both ends of the subframe 100, and the longitudinal bracket 10 is assembled on the transverse bracket 11. After the longitudinal bracket 10 is assembled for the first time, if the entire subframe 100 does not malfunction, it will not be adjusted.

[0042] Furthermore, in order to further improve the stability of the longitudinal support 10 after adjustment, this application also proposes a limiting tooth 17 and a limiting groove 16 to achieve precise alignment and preliminary mechanical limiting of the longitudinal support 10 and the transverse support 11, and to prevent the problems of angular deviation and position misalignment in the early stage of assembly.

[0043] Reference Figure 6 and Figure 7 As shown, the top of the longitudinal support 10 is provided with a limiting tooth 17, and the side of the transverse support 11 near the limiting tooth 17 is provided with a corresponding limiting groove 16.

[0044] When assembling the longitudinal support 10, after determining the position of the longitudinal support 10, the two mounting holes 14 on the longitudinal support 10 are precisely aligned with the strip hole 13 on the surface of the transverse support 11. At the same time, the longitudinal support 10 is pressed against the transverse support 11. At this time, the limiting teeth 17 on the longitudinal support 10 will abut against the limiting groove 16 of the transverse support 11. Then, it is locked with bolts and nuts. Subsequently, when the car is driving on bumpy road conditions, the longitudinal support 10 will not be displaced, thus ensuring the overall strength and stability of the main support 1.

[0045] After the main bracket 1 is installed, the front toe rod is aligned with the countersunk groove 2 on the longitudinal bracket 10 for assembly.

[0046] Reference Figure 8 and Figure 9 As shown, the eccentric gear ring assembly 3 includes two independent eccentric gear rings 30. The two eccentric gear rings 30 are rotatably embedded in the countersunk circular grooves 2 opened on the left and right side walls of the main bracket 1. The center of the eccentric gear ring 30 is provided with an eccentric mounting hole 31 and the outer circumference is provided with worm gear teeth 32.

[0047] The worm gear linkage shaft 33 is fixedly installed on the corresponding installation position of the main bracket 1 by a transversely arranged installation method. The worm gear linkage shaft 33 is supported by the bearing seat 40 to achieve transverse stability and ensure the smoothness of the rotation process of the worm gear linkage shaft 33. Both ends of the worm gear linkage shaft 33 are machined with helical teeth structure. The helical teeth at both ends can respectively form a corresponding meshing relationship with the worm gear teeth 32 of the eccentric gear ring 30 embedded in the countersunk circular grooves 2 on the left and right side walls of the main bracket 1.

[0048] The helical teeth of the worm gear linkage shaft 33 and the worm wheel teeth 32 of the eccentric gear ring 30 are installed in a vertically interlocking meshing manner to form a worm gear transmission mechanism, which converts the horizontal rotational power of the worm gear linkage shaft 33 into the circumferential rotational power of the eccentric gear ring 30. The longitudinal support 10 is provided with a scale near the worm gear linkage shaft 33 to facilitate the control of the adjustment accuracy of the worm gear linkage shaft 33, thereby further improving the accuracy of the toe bar adjustment.

[0049] Reference Figure 4 and Figure 5 As shown, the toe rod mounting bolt 4 serves as the connecting and fixing component between the toe rod and the eccentric gear ring 30. The rod body of the toe rod mounting bolt 4 passes through the eccentric mounting holes 31 at the center of the eccentric gear ring 30 on both sides of the main bracket 1. The toe rod is fixedly installed on the eccentric gear ring assembly 3 through the bolt locking structure. Relying on the eccentric structure characteristics of the eccentric mounting holes 31, the rotational motion of the eccentric gear ring 30 is converted into the position displacement adjustment motion of the toe rod.

[0050] Precise adjustment of the toe angle is achieved through the linkage of the worm gear transmission mechanism. During the rotation of the worm linkage shaft 33 driven by manual or equipment drive, the worm linkage shaft 33 will synchronously drive the eccentric gear rings 30 on both sides to rotate around their own central axis through the meshing helical teeth at both ends. The rotation angle, rotation speed and rotation direction of the eccentric gear rings 30 on both sides are completely consistent. During the rotation of the eccentric gear rings 30, they will rely on the eccentric structure characteristics of their own eccentricity mounting holes 31 to synchronously drive the toe rod mounting bolts 4 that are fixed through them to produce a horizontal front-to-back displacement change. Through the displacement change of the toe rod mounting bolts 4, the toe rod is driven to complete the position fine adjustment, thereby achieving precise calibration and adjustment of the toe angle parameters of the vehicle chassis.

[0051] It should be noted that the worm gear transmission mechanism has a mechanical reverse self-locking characteristic, which limits the direction of power transmission. It only allows manual or equipment control of the worm linkage shaft 33 to actively rotate and drive the eccentric gear ring 30 to complete the rotation adjustment action. It can completely block the reverse power transmission of the eccentric gear ring 30 after being impacted by external force, and effectively prevent the road impact force and vibration load during vehicle operation from being transmitted in reverse through the toe rod to the eccentric gear ring 30 and then driving the worm linkage shaft 33 to rotate.

[0052] However, the worm gear linkage shaft 33 is a helical tooth. If the helical tooth is directly subjected to external force, it will cause deformation. Therefore, this application proposes a positioning pin 302 and a split-type eccentric gear ring 30.

[0053] Reference Figure 9 , Figure 10 and Figure 11 As shown, the eccentric gear ring 30 adopts a double-layer split elastic positioning structure design. The eccentric gear ring 30 includes two split structures: an outer gear ring 300 and an inner gear ring 301. The outer gear ring 300 has several positioning posts 302 fixedly installed at equal intervals along the axial direction. All positioning posts 302 are arranged perpendicular to the outer gear ring 300 and their ends extend beyond the outer gear ring 300 into the longitudinal support 10. The inner gear ring 301 has corresponding through-hole structures that match the number, position, and diameter of the positioning posts 302. 301 is slidably installed on the corresponding positioning post 302 through the through hole to achieve sliding fit with the outer gear ring 300. The gap space between the inner gear ring 301 and the outer gear ring 300 is equipped with a positioning spring 303 sleeved on the outside of the positioning post 302. The two ends of the positioning spring 303 abut against the inner side of the outer gear ring 300 and the outer side of the inner gear ring 301, respectively. The helical tooth structure of the worm gear linkage shaft 33 and the tooth surface of the inner gear ring 301 of the eccentric gear ring 30 form a meshing fit relationship.

[0054] Reference Figure 10 , Figure 11 and Figure 12As shown, the ends of each positioning post 302 away from the outer gear ring 300 are machined into serrated structures 305. The serrated structures 305 are evenly distributed on the circumferential side of the end of the positioning post 302 and the tooth shape is regular and uniform. The side wall plate of the main bracket 1 is provided with several matching slots 304 that correspond to the specifications of the serrated structures 305 at the end of the positioning post 302. The serrated structures 305 of the positioning post 302 can be engaged and positioned with the matching slots 304. Through this engagement structure, the eccentric gear ring 30 is accurately locked and positioned after rotation adjustment, preventing the eccentric gear ring 30 from rotating and shifting due to vibration. At the same time, the positioning post 302 bears the external force during vehicle operation and the external force that forces the eccentric gear ring 30 to rotate in the opposite direction, avoiding direct force on the worm gear linkage shaft 33, and further improving the stability of the front toe bar installation.

[0055] When the vehicle's toe-in parameters are deviated and need adjustment during operation, the operator first loosens the locking nut of the toe-in rod mounting bolt 4 to release the rigid lock between the toe-in rod and the eccentric gear ring 30. At this time, the compressed positioning spring 303 is released, forcing the outer gear ring 300 to move outward, causing the serrated structure 305 of the positioning post 302 to separate from the mating groove 304 of the longitudinal bracket 10, thus releasing the angle lock of the eccentric gear ring 30.

[0056] Next, the operator manually rotates the worm gear linkage shaft 33. The worm gear linkage shaft 33 rotates smoothly under the support of the bearing seat 40. The helical teeth at both ends rotate synchronously and continuously drive the meshing eccentric gear ring 30 to rotate synchronously around its own axis inside the countersunk groove. During the rotation of the eccentric gear ring 30, it will drive the toe rod mounting bolt 4 to produce a corresponding front and rear horizontal displacement, thereby accurately adjusting the assembly position of the toe rod and gradually correcting the vehicle's toe parameters to the standard value range.

[0057] Finally, tighten the toe-up rod mounting bolt 4 again. During the tightening process, the inner gear ring 301 and the outer gear ring 300 will be squeezed together, and the positioning spring 303 will be compressed. At the same time, the serrated structure 305 of the positioning post 302 will re-engage with the matching groove 304 of the longitudinal bracket 10, thereby locking the entire eccentric gear ring 30.

[0058] Furthermore, refer to Figure 10 and Figure 11 As shown, the central area of ​​the eccentric gear ring 30 is provided with a number of eccentric mounting holes 31 arranged in a ring. The distance from the center of each eccentric mounting hole 31 to the rotation axis of the eccentric gear ring 30 is different. Therefore, it can provide multiple positions and high-precision position adjustment points for the assembly of the toe rod. For example, for large-sized cars, the eccentric mounting holes 31 that are far away from the central axis of the eccentric gear ring 30 are selected for the assembly of the toe rod; for small-sized cars, the eccentric mounting holes 31 that are close to the central axis of the eccentric gear ring 30 are selected for the assembly of the toe rod.

[0059] This significantly expands the adjustment range of the toe-in parameter, adapting to the adjustment needs of different vehicle models, different assembly deviations, and different maintenance conditions, thus improving the applicability of the device.

[0060] During work: The first step is to assemble and fix the main support 1 using a modular splicing structure. The transverse support 11 is installed on the subframe 100 by welding. After the two longitudinal supports 10 are adjusted to their positions, the strip hole 13 of the transverse support 11 is aligned with the mounting hole 14 of the longitudinal support 10. Then, the bolts are inserted through the mounting hole 14, the strip hole 13, the nuts, and the locking washers to ensure the stability of the assembly of the transverse support 11 and the longitudinal support 10, thus completing the basic positioning assembly of the entire device.

[0061] Step 2: Align the hole at the end of the toe bar with the main bracket 1, and pass the toe bar mounting bolt 4 through the eccentric mounting hole 31 at the center of the left and right eccentric gear rings 30 in sequence. Fix the toe bar to be assembled between the two eccentric gear rings 30, and complete the fixed assembly of the toe bar and the bracket structure by tightening the toe bar mounting bolt 4.

[0062] Step 3: When toe angle adjustment is required, loosen the toe rod mounting bolt 4 to reduce its clamping force, making it easier to adjust the eccentric gear ring 30 later. Then, by rotating the worm gear linkage shaft 33, the eccentric gear rings 30 on both sides are synchronously driven to rotate through the worm gear transmission structure. The eccentric displacement characteristics of the eccentric mounting hole 31 are used to drive the toe rod position to be finely adjusted, and the vehicle toe angle parameters are accurately calibrated.

[0063] Step 4: While loosening the toe-up rod mounting bolt 4, the serrated structure 305 of the positioning post 302 separates from the mating groove 304 on the main bracket 1. At this time, the eccentric gear ring 30 can be selected. After the vehicle's toe angle parameters are accurately calibrated, the toe-up rod mounting bolt 4 is immediately retightened. At the same time, the toe-up rod mounting bolt 4 will squeeze the eccentric gear ring 30, causing the positioning post 302 on the outer gear ring 300 of the eccentric gear ring 30 to re-engage with the mating groove 304. This prevents the adjusted vehicle toe angle parameters from changing during subsequent violent bumpy driving, thus completing the final fixed assembly of the toe-up rod.

[0064] Step 5: In addition, when the alternating load generated during vehicle operation is transmitted to the eccentric gear ring 30, the positioning spring 303 inside the eccentric gear ring 30 can buffer and offset part of the vibration load through its own elastic extension and contraction characteristics, thereby reducing the rigid impact and wear between components.

[0065] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A subframe front toe bar mounting bracket structure, characterized in that: include: The main support (1) has a U-shaped structure and is fixedly connected to the subframe (100). The main support (1) includes a transverse support (11) and two longitudinal supports (10). The two side walls of the longitudinal supports (10) are provided with countersunk circular grooves (2). The eccentric gear ring assembly (3) includes two eccentric gear rings (30) that are rotatably embedded in the countersunk circular grooves (2) on both sides of the eccentric gear ring (30). The center of the eccentric gear ring (30) is provided with several eccentric mounting holes (31) and the outer circumference is provided with worm gear teeth (32). The worm gear linkage shaft (33) is horizontally mounted on the longitudinal support (10) of the main support (1), and the helical teeth of the worm gear linkage shaft (33) mesh with the worm wheel teeth (32) of the eccentric gear ring (30); The toe-up mounting bolt (4) passes through the eccentric mounting hole (31) of the eccentric gear ring (30) to fix the toe-up; The eccentric gear ring (30) includes an outer gear ring (300) and an inner gear ring (301). The outer gear ring (300) is equipped with a number of positioning pins (302) at equal intervals along the axial direction. The inner gear ring (301) slides through the positioning pins (302), and a positioning spring (303) is installed between the inner gear ring (301) and the outer gear ring (300) and sleeved on the positioning pins (302). The end of the positioning column (302) is a sawtooth structure (305), and the longitudinal support (10) of the main support (1) is provided with a matching groove (304) corresponding to the sawtooth structure (305) of the positioning column (302).

2. The subframe front toe bar mounting bracket structure according to claim 1, characterized in that: The distance between the center of several eccentric mounting holes (31) on the eccentric gear ring (30) and the axis of the eccentric gear ring (30) is different.

3. The subframe front toe bar mounting bracket structure according to claim 1, characterized in that: The helical teeth of the worm gear linkage shaft (33) and the worm wheel teeth (32) of the eccentric gear ring (30) are perpendicularly cross-meshing.

4. The subframe front toe bar mounting bracket structure according to claim 1, characterized in that: The longitudinal support (10) of the main support (1) is provided with a bearing seat (40), and the worm gear linkage shaft (33) is installed on the main support (1) by lateral rotation through the bearing seat (40).

5. The subframe front toe bar mounting bracket structure according to claim 1, characterized in that: The transverse support (11) has a strip hole (13), and the longitudinal support (10) has two mounting holes (14). The mounting holes (14) of the longitudinal support (10) correspond to the strip hole (13) of the transverse support (11), and the bolts and nuts are inserted through the mounting holes (14) for locking, so that the two longitudinal supports (10) are symmetrically distributed.

6. The subframe front toe bar mounting bracket structure according to claim 1, characterized in that: The longitudinal support (10) is provided with a limiting groove (16), and the transverse support (11) is provided with a corresponding limiting tooth (17) on the side near the limiting groove (16).

7. The subframe front toe bar mounting bracket structure according to claim 1, characterized in that: The bolts that lock the transverse support (11) and the longitudinal support (10) are provided with locking washers.

8. The subframe front toe bar mounting bracket structure according to claim 1, characterized in that: Driven by the worm gear linkage shaft (33), the eccentric gear ring (30) rotates synchronously around its axis and drives the front lead rod mounting bolt (4) to generate front and rear horizontal displacement through the eccentric mounting hole (31).

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