Stiffness-adjustable suspension torsion bar structure

Abstract

The utility model discloses a kind of stiffness adjustable suspension torsion bar structure, belong to automobile technical field.To solve the problem that current suspension torsion bar cannot adjust length of action.It mainly includes torsion bar, the front and rear ends of the torsion bar are connected with front mounting seat and rear mounting seat respectively, the rear mounting seat includes fixed plate, support block and locking structure;The support block can slide along the length direction of fixed plate, and is selectively fixed in different positions on the fixed plate by locking structure;The rear end of the support block and torsion bar is connected in axial sliding, and circumferential limiting structure is arranged between support block and torsion bar, and the circumferential limiting structure is used to limit relative rotation of support block and torsion bar.

Description

Technical Field

[0001] This utility model belongs to the field of automotive technology, and more specifically, it relates to a suspension torsion bar structure with adjustable stiffness. Background Technology

[0002] In automotive suspension systems, torsion bar springs, as core elastic components, play a crucial role in supporting the vehicle's weight, transmitting road loads, and mitigating impact vibrations. Their stiffness characteristics directly determine the suspension's handling and ride comfort. Currently, most mainstream suspensions use torsion bar springs with fixed stiffness designs. Their effective length (the effective length of a torsion bar refers to the distance between the engagement points of the splines at its front and rear ends) is fixed at the factory, requiring pre-matching of stiffness parameters based on specific vehicle models and usage scenarios. However, during suspension tuning, engineers need to adjust suspension stiffness for different vehicle weights (such as compact cars and mid-size cars) and different performance goals (comfort-oriented, sport-oriented). Existing torsion bars with fixed effective lengths cannot flexibly adapt, necessitating frequent replacements of torsion bars of different specifications, leading to low tuning efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a suspension torsion bar structure with adjustable stiffness to overcome the problem that the current suspension torsion bar cannot adjust its working length.

[0004] This utility model is achieved using the following technical solution: a suspension torsion bar structure with adjustable stiffness, comprising a torsion bar, the front and rear ends of which are respectively connected to a front mounting seat and a rear mounting seat. The rear mounting seat includes a fixed plate, a support block, and a locking structure. The support block can slide along the length direction of the fixed plate and is selectively fixed to different positions on the fixed plate by the locking structure. The support block and the rear end of the torsion bar are axially slidably connected, and a circumferential limiting structure is provided between the support block and the torsion bar to restrict relative rotation between the support block and the torsion bar.

[0005] Furthermore, a long, narrow sliding groove is provided in the middle of the fixed plate, and a sliding plate is fixedly connected to the top of the support block, with the sliding plate passing upward through the sliding groove.

[0006] Furthermore, a limiting plate is fixedly installed on the top of the skateboard, and the limiting plate is set perpendicular to the skateboard.

[0007] Furthermore, the locking structure includes a plurality of upper fixing holes spaced apart on the fixing plate along the length of the fixing plate, a lower fixing hole on the support block, and a locking bolt. The locking bolt connects one of the upper fixing holes and the lower fixing hole to achieve relative fixation between the support block and the fixing plate.

[0008] Furthermore, the upper fixing holes are arranged in the form of hole groups, and each hole group includes two upper fixing holes arranged along the width direction of the fixing plate.

[0009] Furthermore, extension plates extend outward from both sides of the top of the support block, and each extension plate has two lower fixing holes along its length.

[0010] Furthermore, the circumferential limiting structure includes a rear spline disposed at the rear end of the torsion bar and a rear spline hole formed on the support block and adapted to the rear spline; the rear spline passes through the rear spline hole and allows the torsion bar to move axially relative to the support block.

[0011] Furthermore, upwardly extending side plates are installed on both sides of the fixing plate, and outwardly extending connecting plates are connected to the top of the two side plates respectively.

[0012] Furthermore, the front end of the torsion bar is provided with a front spline, and the front mounting base is provided with a front spline groove adapted to the front spline, and the front spline is inserted into the front spline groove; an anti-disengagement structure is also provided between the front mounting base and the torsion bar, and the anti-disengagement structure is used to restrict the torsion bar from axially disengaging from the front spline groove; the front mounting base is provided with a fixing seat mounting hole.

[0013] Furthermore, the anti-detachment structure includes a limiting bolt, a bolt hole opened in the rear end wall of the front spline groove, and an internal threaded hole opened in the front end face of the torsion bar. The limiting bolt passes through the bolt hole and is threadedly connected to the internal threaded hole.

[0014] Compared with the prior art, the beneficial effects of this utility model are: The torsion bar described in this invention achieves adjustable working length through the rear mounting base, and the adjustment process is very convenient. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present invention: Figure 2 yes Figure 1 A magnified view of a section at point I; Figure 3 and Figure 4 These are partial schematic diagrams of this utility model; Figure 5 This is a schematic diagram of the support block described in this utility model; Figure 6 This is an exploded view of the structure of this utility model; Figure 7 This is a diagram showing the usage state of this utility model.

[0016] In the diagram: 1. Torsion bar; 2. Front mounting base; 3. Rear mounting base; 4. Fixing plate; 5. Support block; 6. Sliding groove; 7. Slide plate; 8. Limiting plate; 9. Upper fixing hole; 10. Lower fixing hole; 11. Locking bolt; 12. Extension plate; 13. Rear spline; 14. Rear spline hole; 15. Side plate; 16. Connecting plate; 17. Front spline; 18. Front spline groove; 19. Fixing base mounting hole; 20. Limiting bolt; 21. Bolt hole; 22. Internal threaded hole. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort should fall within the scope of protection of this utility model.

[0018] A stiffness-adjustable suspension torsion bar structure includes a torsion bar 1, the front and rear ends of which are respectively connected to a front mounting seat 2 and a rear mounting seat 3, and the torsion bar 1 is installed between the front mounting seat 2 and the rear mounting seat 3.

[0019] The torsion bar 1 achieves adjustable working length through the rear mounting base 3, and the adjustment is very convenient.

[0020] The rear mounting base 3 includes a fixing plate 4, a support block 5, and a locking structure.

[0021] The fixing plate 4 is used to connect to the car body, and the fixing plate 4 can be connected to the car body by welding. Upwardly extending side plates 15 are respectively installed on both sides of the fixing plate 4, and outwardly extending connecting plates 16 are respectively connected to the top of the side plates 15. When fixing, the fixing plate 4 can be welded to the car body through the connecting plates 16 on both sides.

[0022] The support block 5 can slide along the length of the fixed plate 4. The fixed plate 4 has a long sliding groove 6 in the middle. A sliding plate 7 is fixedly connected to the top of the support block 5, and the sliding plate 7 passes upward through the sliding groove 6. In this invention, the support block 5 slides relative to the fixed plate 4 through the sliding plate 7 and the sliding groove 6.

[0023] A limiting plate 8 is fixedly installed on the top of the slide plate 7, and the limiting plate 8 is perpendicular to the slide plate 7. In this invention, the slide plate 7 and the limiting plate 8 form an L-shaped structure, and the limiting plate 8 can prevent the support block 5 from separating from the fixing plate 4.

[0024] The support block 5 is selectively fixed to different positions on the fixed plate 4 by means of a locking structure. When the present invention needs to adjust the working length of the torsion bar 1, the support block 5 can be slid along the length direction of the fixed plate 4 to change the fixed position of the torsion bar 1 and the fixed plate 4, thereby changing the working length of the torsion bar 1. Finally, the relative fixation of the support block 5 and the fixed plate 4 is achieved by means of a locking structure. After the support block 5 and the fixed plate 4 are relatively fixed, the support block 5 can no longer move relative to the fixed plate 4.

[0025] The locking structure includes a plurality of upper fixing holes 9 spaced apart on the fixing plate 4 along its length, a lower fixing hole 10 on the support block 5, and a locking bolt 11. The locking bolt 11 connects one of the upper fixing holes 9 and the lower fixing hole 10 to achieve relative fixation between the support block 5 and the fixing plate 4. The support block 5 of this invention has at least two lower fixing holes 10. The upper fixing holes 9 are threaded holes. To better fix the support block 5 and the fixing plate 4 with the locking bolt 11, a nut can be welded to the upper side of each upper fixing hole 9, thereby better achieving the threaded connection between the locking bolt and the upper fixing hole 9.

[0026] The upper fixing holes 9 are arranged in the form of hole groups, and each hole group includes two upper fixing holes 9 arranged along the width direction of the fixing plate 4. The two upper fixing holes 9 on each hole group are respectively located on both sides of the sliding groove 6 and are arranged opposite to each other.

[0027] The support block 5 has extension plates 12 extending outward from both sides of its top, and each extension plate 12 has two lower fixing holes 10 along its length. This invention, by providing four lower fixing holes 10 on the support block 5, allows for the use of four locking bolts to fix the support block 5 and the fixing plate 4. When fixing the support block 5 and the fixing plate 4, the locking structure first slides the support block 5 back and forth to align the four lower fixing holes 10 on the support block 5 with the four upper fixing holes 9 on the fixing plate 4. Then, the locking bolts pass through the lower fixing holes 10 and the upper fixing holes 9 in sequence and are threaded into the upper fixing holes 9.

[0028] The support block 5 is slidably connected to the rear end of the torsion bar 1 along the axial direction, and a circumferential limiting structure is provided between the two to restrict their relative rotation.

[0029] The circumferential limiting structure includes a rear spline 13 disposed at the rear end of the torsion bar 1 and a rear spline hole 14 formed on the support block 5 and adapted to the rear spline 13; the rear spline 13 passes through the rear spline hole 14 and engages with the rear spline hole 14, and allows the torsion bar 1 to move axially relative to the support block 5.

[0030] The rear spline 13 at the rear end of the torsion bar 1 of this utility model passes through the rear spline 13 groove, realizing the axial sliding connection between the support block 5 and the torsion bar 1. At the same time, the spline and spline groove restrict the relative rotation between the torsion bar 1 and the support block 5, so that the torsion bar 1 cannot rotate relative to the support block 5.

[0031] The torsion bar 1 has a front spline 17 at its front end, and the front mounting base 2 has a front spline groove 18 that is adapted to the front spline 17. The front spline 17 is inserted into the front spline groove 18 and engages with the front spline groove 18 to transmit torque to the torsion bar 1.

[0032] An anti-detachment structure is also provided between the front mounting base 2 and the torsion bar 1. The anti-detachment structure is used to prevent the torsion bar 1 from axially disengaging from the front spline groove 18. The anti-detachment structure includes a limiting bolt 20, a bolt hole 21 opened in the rear end wall of the front spline groove 18, and an internal threaded hole 22 opened in the front end face of the torsion bar 1. The limiting bolt 20 passes through the bolt hole 21 and is threadedly connected to the internal threaded hole 22. The outer diameter of the front spline 17 is larger than the inner diameter of the bolt hole 21, and the bolt head size of the limiting bolt 20 is larger than the inner diameter of the bolt hole 21.

[0033] When the torsion bar 1 of this utility model is connected to the front mounting base 2, the front spline 17 at the front end of the torsion bar 1 is first inserted into the front spline groove 18. At this time, the bolt hole 21 will be aligned with the internal thread hole 22. Then, the limiting bolt 20 is passed through the bolt hole 21 and threadedly connected to the internal thread hole 22. At this time, the limiting bolt 20 can effectively restrict the axial movement of the torsion bar 1.

[0034] The front mounting base 2 has a mounting hole 19 for a fixed base. This utility model connects to the suspension arm through the mounting hole 19 for a fixed base and bolts. When connecting to the suspension arm, the mounting hole 19 for a fixed base is first aligned with the fixed hole on the suspension arm, and then the connection between the front fixed base and the suspension arm is achieved by bolts.

[0035] The working principle of this utility model is as follows: The front mounting base 2 is fixedly connected to the suspension arm by bolts, and the fixing plate 4 is fixedly connected to the car body by welding. When it is necessary to adjust the working length of the torsion bar 1, we only need to remove the four locking bolts 11 between the support block 5 and the fixing plate 4, and then move the support block 5 along the axial direction of the torsion bar 1, thereby changing the meshing position of the rear spline 13 of the torsion bar 1 and the groove of the rear spline 13 of the support block 5. When the support block 5 moves to the appropriate position, the four lower fixing holes 10 on the two side extension plates 12 and the four upper fixing holes 9 on the fixing plate 4 are aligned. Finally, the four locking bolts 11 are installed into the lower fixing holes 10 and the upper fixing holes 9. This utility model achieves the purpose of changing the meshing position of the rear spline 13 of the torsion bar 1 and the groove of the rear spline 13 of the support block 5 by moving the support block 5 along the axial direction of the torsion bar 1, thereby changing the distance between the meshing position of the front spline 17 and the meshing position of the rear spline 13 of the torsion bar 1, and thus changing the working length of the torsion bar 1. The adjustment of the working length of the torsion bar 1 is very convenient.

Claims

1. A stiffness-adjustable suspension torsion bar structure, comprising a torsion bar (1), wherein the front and rear ends of the torsion bar (1) are respectively connected to a front mounting seat (2) and a rear mounting seat (3), characterized in that, The rear mounting base (3) includes a fixing plate (4), a support block (5) and a locking structure; the support block (5) can slide along the length direction of the fixing plate (4) and is selectively fixed to different positions on the fixing plate (4) by the locking structure; the support block (5) is axially slidably connected to the rear end of the torsion bar (1), and a circumferential limiting structure is provided between the support block (5) and the torsion bar (1), the circumferential limiting structure is used to restrict the relative rotation of the support block (5) and the torsion bar (1).

2. The stiffness-adjustable suspension torsion bar structure according to claim 1, characterized in that, The fixed plate (4) has a long strip-shaped sliding groove (6) in the middle, and the top of the support block (5) is fixedly connected to a sliding plate (7), which passes upward through the sliding groove (6).

3. The stiffness-adjustable suspension torsion bar structure according to claim 2, characterized in that, A limiting plate (8) is fixedly installed on the top of the slide plate (7), and the limiting plate (8) is set perpendicular to the slide plate (7).

4. The stiffness-adjustable suspension torsion bar structure according to claim 1, characterized in that, The locking structure includes a plurality of upper fixing holes (9) spaced apart on the fixing plate (4) along the length of the fixing plate (4), a lower fixing hole (10) on the support block (5) and a locking bolt (11). The locking bolt (11) connects one of the upper fixing holes (9) and the lower fixing hole (10) to achieve relative fixation between the support block (5) and the fixing plate (4).

5. The stiffness-adjustable suspension torsion bar structure according to claim 4, characterized in that, The upper fixing holes (9) are arranged in the form of hole groups, each hole group including two upper fixing holes (9) arranged along the width direction of the fixing plate (4).

6. The stiffness-adjustable suspension torsion bar structure according to claim 5, characterized in that, The support block (5) has two extension plates (12) extending outward from the top of each side, and each extension plate (12) has two lower fixing holes (10) along its length.

7. The stiffness-adjustable suspension torsion bar structure according to claim 1, characterized in that, The circumferential limiting structure includes a rear spline (13) disposed at the rear end of the torsion bar (1) and a rear spline hole (14) opened on the support block (5) and adapted to the rear spline (13); the rear spline (13) passes through the rear spline hole (14) and allows the torsion bar (1) to move axially relative to the support block (5).

8. The stiffness-adjustable suspension torsion bar structure according to claim 1, characterized in that, The fixing plate (4) has upwardly extending side plates (15) installed on both sides, and the top of the two side plates (15) is connected to outwardly extending connecting plates (16).

9. The stiffness-adjustable suspension torsion bar structure according to claim 1, characterized in that, The front end of the torsion bar (1) is provided with a front spline (17), and the front mounting base (2) is provided with a front spline groove (18) adapted to the front spline (17), and the front spline (17) is inserted into the front spline groove (18); an anti-detachment structure is also provided between the front mounting base (2) and the torsion bar (1), and the anti-detachment structure is used to restrict the torsion bar (1) from axially dislodging from the front spline groove (18); a fixing seat mounting hole (19) is provided on the front mounting base (2).

10. The stiffness-adjustable suspension torsion bar structure according to claim 9, characterized in that, The anti-detachment structure includes a limiting bolt (20), a bolt hole (21) opened on the rear end wall of the front spline groove (18), and an internal thread hole (22) opened on the front end face of the torsion bar (1). The limiting bolt (20) passes through the bolt hole (21) and is threadedly connected to the internal thread hole (22).

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