Vehicle rear suspension

Abstract

The utility model discloses a vehicle rear suspension, which belongs to the technical field of vehicle suspensions and comprises a rim mounting seat and a rod connecting seat, a lower pull rod and a middle pull rod which are obliquely arranged in a coplanar manner are arranged on one side of the rod mounting seat, and an upper pull rod and a driving half shaft which are vertically arranged in a coplanar manner are arranged on the other side of the mounting seat. The upper pull rod is rotationally connected with the rim mounting seat and located on the inner side of the radius of the rim, and the lower pull rod is rotationally connected with the rim mounting seat and located on the inner side of the radius of the rim. The connecting points of the lower pull rod and the upper pull rod with the rim mounting seat are positioned in the radius of the rim, so that the distances from the lower pull rod and the upper pull rod to the circle center of the rim are reduced, and the rear tire can be well limited when the inclination angle of the rear tire is caused by bumpiness of the road surface, namely, the tire run-out inclination angle is greatly reduced; therefore, the maneuvering performance of the vehicle can be improved; when the rear suspension plays a damping role, interference and collision between the damping stroke of the rear suspension and the rod piece can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a suspension technology, more specifically, it relates to a vehicle rear suspension. BACKGROUND

[0002] Suspension system refers to the spring and shock absorber between the body and the tire to form the whole support system. The function of the suspension system is to support the body and improve the feeling of riding. Different suspension settings will make the driver have different driving feelings. The seemingly simple suspension system integrates multiple forces, determines the stability, comfort and safety of the car, and is one of the very key components of modern cars.

[0003] For example: Chinese patent publication number CN116323264A, publication date June 23, 2023, invention name is rear suspension assembly for off-road vehicle, including frame; front suspension assembly and wheel; left rear suspension assembly connected to frame; right rear suspension assembly connected to frame; wheel with wheel axis and inner rim radius; rear gear train; and motor. Each rear suspension assembly includes: swing arm; shock absorber assembly; steering knuckle, the steering knuckle includes a first part connected to the wheel hub and a second part extending upward from the first part; first link with outward end connected to the first part and inward end connected to the frame; and second link with outward end connected to the second part and inward end connected to the frame. The outward end of the second link is farther than the inner rim radius from the corresponding wheel axis. This scheme is suitable for the operating conditions of side-by-side off-road vehicles, but this suspension assembly may cause the connecting rod on the suspension assembly to interfere with the suspension large stroke, and also reduces the handling performance of the off-road vehicle. UTILITY MODEL CONTENT

[0004] The utility model overcomes the problem of interference between the large stroke of the vehicle suspension and the rod and poor handling performance, provides a vehicle rear suspension, which effectively avoids the problem of interference between the suspension and the rod, and improves the handling performance of the vehicle.

[0005] To solve the above technical problems, the utility model discloses the following technical scheme: A vehicle rear suspension, including wheel rim mounting seat and link connecting seat, one side of link connecting seat is equipped with the pull-down link and the middle pull rod of inclined coplanar arrangement, the other side of mounting seat is equipped with the upper pull rod and drive half shaft of vertical coplanar arrangement, the upper pull rod is connected with wheel rim mounting seat rotation and is located in the inside of wheel rim radius, the pull-down link is connected with wheel rim mounting seat rotation and is located in the inside of wheel rim radius. The wheel rim mounting seat and link connecting seat provide the mounting position for the upper pull rod, the pull-down link and the middle pull rod, and the wheel rim mounting seat also installs the drive half shaft for driving the tire rotation, wherein the connecting point position of the pull-down link and the upper pull rod and the wheel rim mounting seat is located in the inside of the wheel rim radius, which reduces the distance from the pull-down link and the upper pull rod to the wheel center, so that when the rear tire occurs the inclination because of the road surface bump, can be well positioned, that is, the tire jump inclination will greatly reduce, so that the handling performance of the vehicle can be improved, in addition, the suspension assembly can produce a large shock absorbing stroke when damping, and such design can also avoid the interference collision of the rear suspension damping stroke and the link, and protect the suspension assembly.

[0006] As preferred, the middle pull rod is rotationally connected with the wheel rim mounting seat and the link connecting seat, and the pull-down link is rotationally connected with the wheel rim mounting seat and the link connecting seat. The pull-down link and the middle pull rod are connected with the wheel rim mounting seat and the link connecting seat in a rotating manner, so that the link can adapt to the displacement generated during vibration, and avoid damage of the link caused by excessive connection stiffness of the link.

[0007] As preferred, the utility model also includes a connecting arm and a suspension bracket, the suspension bracket includes a first bracket and a second bracket, the first bracket is connected with the second bracket at an acute angle, one end of the first bracket away from the second bracket is connected with the connecting arm, and one end of the second bracket away from the first bracket is connected with the link connecting seat. The first bracket, the second bracket and the connecting arm can form a stable triangular structure, and the connecting arm provides a support position for the suspension bracket.

[0008] As preferred, one end of the connecting arm away from the first bracket is provided with a mounting groove, and the wheel rim mounting seat is arranged in the mounting groove. The mounting groove is used for mounting the wheel rim mounting seat, and the vibration of the tire can be transmitted to the connecting arm, and the vibration displacement of the connecting arm can be absorbed by the connecting arm.

[0009] As preferred, a first connecting rod is arranged on the first bracket, a hinge seat is arranged on the connecting arm, and a shock absorber is arranged between the hinge seat and the first connecting rod. The shock absorber is a damping and buffering element of the rear suspension, and the vibration displacement of the connecting arm can be absorbed by the shock absorber.

[0010] As preferred, a balance bar assembly is further hinged on the hinge seat, and the balance bar assembly is arranged at intervals from the hinge point of the hinge seat and the hinge point of the connecting arm and the hinge seat. The balance bar assembly can balance the force between the bar connecting seat and the connecting arm, and the balance bar assembly is hinged to reduce the vibration displacement between the bar connecting seat and the connecting arm.

[0011] As preferred, the balance bar assembly comprises a rotating piece and a balance bar, one end of the rotating piece is hinged with the hinge seat, the other end of the rotating piece is hinged with the balance bar, and the balance bar is overlapped on one side of the second support close to the bar connecting seat. The rotating piece can adapt to the vibration of the connecting arm to generate a rotating angle, and then the force is transmitted to the bar connecting seat; the two ends of the rotating piece are provided with torsion rubber pieces, which can reduce the rotating angle of the rotating piece, and can also reset the rotating piece as soon as possible, and improve the stability of the rear suspension.

[0012] As preferred, the balance bar is arranged on the side of the bar connecting seat away from the lower pull rod and the middle pull rod. The balance bar is arranged on the inner side of the bar connecting seat, that is, the balance bar is overlapped on the side of the bar connecting seat away from the lower pull rod and the middle pull rod, which is beneficial to balance the vibration displacement of the bar connecting seat, and the connection between the balance bar and the connecting seat is more reliable, and the force transmission effect is better.

[0013] As preferred, a second connecting rod is arranged between the first support and the bar connecting seat, and a supporting rod is further arranged on the second connecting rod. The second connecting rod connects the first support and the bar connecting seat, and provides a supporting point for the bar connecting seat, the supporting rod and the first support and the second connecting rod form a stable triangular structure, which greatly improves the stability of the suspension support and the structural strength of the rear suspension assembly.

[0014] Compared with the prior art, the utility model has the advantages of (1) effectively avoiding the interference between the suspension and the bar, and improving the handling performance of the vehicle; (2) improving the stability and damping performance of the suspension assembly structure; (3) improving the driving safety and experience of the user. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic view of the rim mounting seat and the bar connecting seat assembly of the utility model.

[0016] Figure 2 It is another view of the rim mounting seat and the bar connecting seat assembly of the utility model.

[0017] Figure 3 It is a side view of the rim mounting seat and the bar connecting seat assembly of the utility model.

[0018] Figure 4This is an isometric view of the present invention.

[0019] Figure 5 This is a side view of the present invention.

[0020] Figure 6 This is a schematic diagram from another perspective of the present invention.

[0021] Figure 7 This is a schematic diagram of the connecting arm of this utility model.

[0022] In the diagram: 1. Rim mounting seat, 2. Rod connecting seat, 3. Lower pull rod, 4. Middle pull rod, 5. Upper pull rod, 6. Drive half shaft, 7. Connecting arm, 8. First bracket, 9. Second bracket, 10. Mounting groove, 11. First connecting rod, 12. Hinge seat, 13. Shock absorber, 14. Rotating component, 15. Balance bar, 16. Second connecting rod, 17. Support rod, 18. Connecting hole, 19. First mounting seat, 20. Second mounting seat, 21. Protrusion, 22. Third mounting seat. Detailed Implementation

[0023] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0024] Example 1: As Figures 1 to 4 The vehicle rear suspension shown includes a rim mounting seat 1 and a link connecting seat 2. Six connecting rods and two drive half-shafts 6 are arranged between the rim mounting seat 1 and the link connecting seat 2. Specifically, it includes two upper tie rods 5, two lower tie rods 3, and two middle tie rods 4. The lower tie rods 3 and middle tie rods 4 are arranged on one side of the link connecting seat 2, and the drive half-shafts 6 and upper tie rods 5 are arranged on the other side of the link connecting seat 2. The rim mounting seat 1 is used to install the rim and rear tire, etc. The link connecting seat 2 is fixed on the suspension bracket. The upper tie rods 5, lower tie rods 3, and middle tie rods 4 are all hinged to the rim mounting seat 1 and the link connecting seat 2, which can produce a certain rotation angle.

[0025] In the present scheme, since the lower pull rod 3, the middle pull rod 4, the upper pull rod 5 and the drive half shaft 6 are all in pairs, only one of the rod is described, and the other rod has the same features. The lower pull rod 3 and the middle pull rod 4 are arranged on the rear side of the rod connecting seat 2 (relative to the front and rear direction of the vehicle), and the upper pull rod 5 is arranged on the front side of the rod connecting seat 2. A through hole is arranged at the center position of the rim mounting seat 1, one end of the drive half shaft 6 penetrates through the through hole of the rim mounting seat 1 and can drive the rim and the tire to rotate, and the other end of the drive half shaft 6 is connected with the differential (not shown in the figure), the differential drives the drive half shaft 6 to rotate, and further drives the tire assembly (not shown in the figure) to rotate. The position of the lower pull rod 3 is lower than the position of the middle pull rod 4, and the position of the middle pull rod 4 is lower than the position of the upper pull rod 5. Specifically, two vertical connecting holes are arranged below the middle of the rear side of the rod connecting seat 2, and two vertical connecting holes 18 are arranged at the position of the rear side of the rim mounting seat 1. The two ends of the lower pull rod 3 and the middle pull rod 4 are arranged in the connecting holes of the rod connecting seat 2 and the rim mounting seat 1 respectively, and are rotationally connected. It should be noted that the lower pull rod 3 and the middle pull rod 4 form a certain angle with the horizontal plane and the vertical plane. When the rim shakes up and down during the driving of the vehicle, the lower pull rod 3 and the middle pull rod 4 can swing relative to the rim mounting seat 1 and the rod connecting seat 2, so that the lower pull rod 3 and the middle pull rod 4 can adapt to the displacement change due to vibration, and prevent the pull rod from being damaged. Similarly, the upper pull rod 5 is arranged directly above the rim mounting seat 1, i.e. directly above the drive half shaft 6, and both are located in the same vertical plane. A first mounting seat 19 is arranged directly above the rim mounting seat 1, and the first mounting seat 19 is U-shaped and hinged with the upper pull rod 5. Similarly, a second mounting seat 20 is arranged on the front side of the rod connecting seat 2, and the position of the second mounting seat 20 is higher than the position of the first mounting seat 19 as a whole, but is located in the same vertical plane. The second mounting seat 20 is also provided with a corresponding U-shaped groove and is hinged with the upper pull rod 5.

[0026] It should be noted that the middle pull rod 4 can adjust the toe value of the rear tire to ensure that the rear tire does not deviate or deflect seriously; therefore, the middle pull rod 4 cannot be arranged at the vertical diameter position of the rim mounting seat 1, and therefore the connection position of the middle pull rod 4 and the rim mounting seat 1 is close to the rear side of the rim mounting seat 1, and in order to improve the adjustment effect of the middle pull rod 4 on the toe, a protrusion 21 structure is further arranged on the rod connecting seat 2, which makes the middle pull rod 4 closer to the rear side of the vehicle, and is more conducive to the regulation of the toe value of the middle pull rod 4. The lower pull rod 3 and the upper pull rod 5 are used to jointly adjust the inner and outer inclination angles of the tire. Specifically, during the driving process of the vehicle, if the top of the tire tilts outward of the vehicle body and the bottom of the tire tilts inward of the vehicle body when the vehicle is vibrating, the upper pull rod 5 generates a pulling force on the tire, and the lower pull rod 3 generates a pushing force on the tire, and vice versa. The action forces of the upper pull rod 5 and the lower pull rod 3 are opposite; in this way, the inner and outer inclination angles of the tire during operation can be ensured to be not too large, thereby ensuring driving safety; further, since the upper pull rod 5 and the lower pull rod 3 are respectively arranged on the upper and lower sides of the rim mounting seat 1, the distance from the upper pull rod 5 to the center of the rim mounting seat 1 and the distance between the lower pull rod 3 and the rim mounting seat 1 are both less than the radius of the rim (not shown in the figure). In this way, the tire assembly can be further prevented from generating large deflection, thereby improving the handling performance of the vehicle.

[0027] Embodiment 2: a vehicle rear suspension as shown in Figures 1 to 7 The embodiment 2 comprises a rim mounting seat 1 and a rod connecting seat 2, six connecting rods and two drive half shafts 6 are arranged between the rim mounting seat 1 and the rod connecting seat 2; specifically, two upper pull rods 5, two lower pull rods 3 and two middle pull rods 4 are arranged on one side of the rod connecting seat 2, and the drive half shaft 6 and the upper pull rod 5 are arranged on the other side of the rod connecting seat 2; the rim mounting seat 1 is used for mounting structures such as rims and rear tires, the rod connecting seat 2 is fixed on the suspension bracket, and the upper pull rod 5, the lower pull rod 3 and the middle pull rod 4 are all hinged between the rim mounting seat 1 and the rod connecting seat 2, and can produce a certain rotation angle.

[0028] In the present scheme, since the lower pull rod 3, the middle pull rod 4, the upper pull rod 5 and the drive half shaft 6 are all in pairs, only one of the rod is described, and the other rod has the same features. The lower pull rod 3 and the middle pull rod 4 are arranged on the rear side of the rod connecting seat 2 (relative to the front and rear direction of the vehicle), and the upper pull rod 5 is arranged on the front side of the rod connecting seat 2. A through hole is arranged at the center position of the rim mounting seat 1, one end of the drive half shaft 6 penetrates through the through hole of the rim mounting seat 1 and can drive the rim and the tire to rotate, and the other end of the drive half shaft 6 is connected with the differential (not shown in the figure), the differential drives the drive half shaft 6 to rotate, and further drives the tire assembly (not shown in the figure) to rotate. The position of the lower pull rod 3 is lower than the position of the middle pull rod 4, and the position of the middle pull rod 4 is lower than the position of the upper pull rod 5. Specifically, two vertical connecting holes are arranged below the middle of the rear side of the rod connecting seat 2, and two vertical connecting holes 18 are arranged at the position of the rear side of the rim mounting seat 1. The two ends of the lower pull rod 3 and the middle pull rod 4 are arranged in the connecting holes of the rod connecting seat 2 and the rim mounting seat 1 respectively, and are rotationally connected. It should be noted that the lower pull rod 3 and the middle pull rod 4 form a certain angle with the horizontal plane and the vertical plane. When the rim shakes up and down during the driving of the vehicle, the lower pull rod 3 and the middle pull rod 4 can swing relative to the rim mounting seat 1 and the rod connecting seat 2, so that the lower pull rod 3 and the middle pull rod 4 can adapt to the displacement change due to vibration, and prevent the pull rod from being damaged. Similarly, the upper pull rod 5 is arranged directly above the rim mounting seat 1, i.e. directly above the drive half shaft 6, and both are located in the same vertical plane. A first mounting seat 19 is arranged directly above the rim mounting seat 1, and the first mounting seat 19 is U-shaped and hinged with the upper pull rod 5. Similarly, a second mounting seat 20 is arranged on the front side of the rod connecting seat 2, and the position of the second mounting seat 20 is higher than the position of the first mounting seat 19 as a whole, but is located in the same vertical plane. The second mounting seat 20 is also provided with a corresponding U-shaped groove and is hinged with the upper pull rod 5.

[0029] It should be noted that the middle pull rod 4 can adjust the toe value of the rear tire to ensure that the rear tire does not deviate or deflect seriously; therefore, the middle pull rod 4 cannot be arranged at the vertical diameter position of the rim mounting seat 1, and therefore the connection position of the middle pull rod 4 and the rim mounting seat 1 is close to the rear side of the rim mounting seat 1, and in order to improve the adjustment effect of the middle pull rod 4 on the toe, a protrusion 21 structure is further arranged on the rod connecting seat 2, which makes the middle pull rod 4 closer to the rear side of the vehicle, and is more conducive to the regulation of the toe value of the middle pull rod 4. The lower pull rod 3 and the upper pull rod 5 are used to jointly adjust the inner and outer inclination angles of the tire. Specifically, during vehicle driving, if the top of the tire tilts outward of the vehicle body and the bottom of the tire tilts inward of the vehicle body when vibration occurs, the upper pull rod 5 generates a pulling force on the tire, and the lower pull rod 3 generates a pushing force on the tire, and vice versa. The action forces of the upper pull rod 5 and the lower pull rod 3 are opposite; in this way, the inner and outer inclination angles of the tire during operation can be ensured to be not too large, thereby ensuring driving safety; further, since the upper pull rod 5 and the lower pull rod 3 are respectively arranged on the upper and lower sides of the rim mounting seat 1, the distance from the upper pull rod 5 to the center of the rim mounting seat 1 and the distance from the lower pull rod 3 to the rim mounting seat 1 are both less than the radius of the rim (not shown in the figure). In this way, the tire assembly can be further prevented from generating large deflection, thereby improving the handling performance of the vehicle.

[0030] The suspension bracket includes a first bracket 8 and a second bracket 9, the first bracket 8 is arranged close to the front side of the vehicle body, and the second bracket 9 is arranged close to the rear side of the vehicle body. The top of the first bracket 8 is inclined toward the rear side of the vehicle body, and the second bracket 9 is inclined toward the front side of the vehicle body. The first bracket 8 and the second bracket 9 can be regarded as a quadrilateral bracket, wherein the second bracket 9 is an isosceles trapezoidal structure, the side of the second bracket 9 away from the first bracket 8 is fixedly connected with the rod connecting seat 2, and the end of the first bracket 8 away from the second bracket 9 is rotatably connected with a connecting arm 7. The end of the connecting arm 7 away from the first bracket 8 is fixedly connected with the rim mounting seat 1. The connecting arm 7 is provided with two connecting arms arranged on the left and right sides of the vehicle body. Thus, the first bracket 8, the second bracket 9 and the connecting arm 7 form a stable triangular structure, so that the vehicle suspension assembly has a certain stability.

[0031] Specifically, a third mounting seat 22 is arranged between the connecting arm 7 and the first bracket 8, the third mounting seat 22 is fixedly connected with the first bracket 8, and the connecting arm 7 is hingedly connected with the third mounting seat 22. The end of the connecting arm 7 away from the first bracket 8 is provided with a mounting groove 10 for fixedly mounting the rim mounting seat 1.

[0032] The hinged seat 12 is arranged on the connecting arm 7, is located on the side of the connecting arm 7 close to the rim mounting seat 1, and is rotationally connected with the connecting arm 7. A balance bar assembly is arranged on the side of the hinged seat 12 away from the connecting arm 7. Similarly, the balance bar assembly is also rotationally connected with the hinged seat 12. Specifically, the balance bar assembly comprises a rotating piece 14 and a balance bar 15. One end of the rotating piece 14 is hinged with the hinged seat 12, and the other end of the rotating piece 14 is hinged with the balance bar 15. The balance bar 15 is a C-shaped bar. The two ends of the balance bar 15 are respectively hinged with the rotating pieces 14 on the two sides. The middle part of the balance bar 15 is overlapped on the front side (relative to the front-rear direction of the vehicle body) of the bar connecting seat 2, and is overlapped on the connecting position of the bar connecting seat 2 and the second support 9. The hinged seat 12, the rotating piece 14 and the balance bar 15 form a three-link assembly. The rotating piece 14 can adapt to the vibration of the connecting arm 7 to generate a rotation angle, and then transmit the force to the bar connecting seat 2. The two ends of the rotating piece 14 are provided with torsion rubber pieces, which can reduce the rotation angle of the rotating piece 14, and also make it reset as soon as possible, thereby improving the stability of the rear suspension.

[0033] The common connecting bar of the first support 8 and the second support 9 is a first connecting bar 11. The first connecting bar 11 is provided with a shock absorber 13 on the hinged seat 12 of the connecting arm 7. The shock absorber 13 is a gas spring, and is a damping and buffering element of the rear suspension. The vibration displacement of the connecting arm 7 can be absorbed by the shock absorber 13. A second connecting bar 16 is further arranged at the bottom of the first bar 11 and the bottom of the bar connecting seat 2. The second connecting bar 16 is fixedly connected with a support bar 17 at the middle part of the first support 8. The second connecting bar 16 connects the first support 8 and the bar connecting seat 2, and provides a support point for the bar connecting seat 2. The support bar 17, the first support 8 and the second connecting bar 16 form a stable triangular structure, thereby greatly improving the stability of the suspension support and the structural strength of the rear suspension assembly.

Claims

1. A vehicle rear suspension, characterized by, The rim mounting seat and the rod connecting seat are provided with an upper pull rod and a driving half shaft arranged vertically and coplanar on the other side of the mounting seat, the upper pull rod is rotationally connected with the rim mounting seat and located inside the rim radius, and the lower pull rod is rotationally connected with the rim mounting seat and located inside the rim radius.

2. A vehicle rear suspension as claimed in claim 1, characterised in that, The middle pull rod is rotationally connected with the rim mounting seat and the rod connecting seat, and the lower pull rod is rotationally connected with the rim mounting seat and the rod connecting seat.

3. A vehicle rear suspension according to claim 1 or 2, characterised in that, The connecting arm and the suspension bracket are further provided, the suspension bracket comprises a first bracket and a second bracket, the first bracket and the second bracket are connected at an acute angle, one end of the first bracket away from the second bracket is connected with the connecting arm, and one end of the second bracket away from the first bracket is connected with the rod connecting seat.

4. A vehicle rear suspension as claimed in claim 3, characterised in that, One end of the connecting arm away from the first bracket is provided with a mounting groove, and the rim mounting seat is arranged in the mounting groove.

5. A vehicle rear suspension as claimed in claim 3, wherein, A first connecting rod is arranged on the first bracket, a hinged seat is arranged on the connecting arm, and a shock absorber is arranged between the hinged seat and the first connecting rod.

6. A vehicle rear suspension as claimed in claim 5 wherein, A balance bar assembly is further hinged on the hinged seat, and the hinged point of the balance bar assembly and the hinged point of the connecting arm and the hinged seat are arranged at intervals.

7. A vehicle rear suspension as claimed in claim 6, characterised in that, The balance bar assembly comprises a rotating piece and a balance bar, one end of the rotating piece is hinged with the hinged seat, the other end of the rotating piece is hinged with the balance bar, and the balance bar is overlapped on one side of the second bracket close to the rod connecting seat.

8. A vehicle rear suspension as claimed in claim 7, characterised in that, The balance bar is arranged on the side of the rod connecting seat away from the lower pull rod and the middle pull rod.

9. A vehicle rear suspension as claimed in claim 3, wherein, A second connecting rod is arranged between the first bracket and the rod connecting seat, and a supporting rod is further arranged on the second connecting rod.

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