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CN-121989607-A - Suspension system for vehicle and vehicle

CN121989607ACN 121989607 ACN121989607 ACN 121989607ACN-121989607-A

Abstract

A suspension system for a vehicle and a vehicle including a wheel frame fitted to a wheel, a toe-in link hinged to the wheel frame at a first hinge point and hinged to a frame, a subframe or a steering gear at a second hinge point, an integral link hinged to the wheel frame at one end, a lower swing arm hinged to the wheel frame at a third hinge point, hinged to the frame or subframe at a fourth hinge point and a fifth hinge point and hinged to the other end of the integral link, and a spring and a damper supported by the toe-in link on a first virtual straight line passing through the first hinge point and the second hinge point and connected to a vehicle body, wherein the toe-in link is located close to and rearward of the lower swing arm, the fourth hinge point is located closer to the toe-in link than the fifth hinge point, and a distance between the first hinge point and the second hinge point is greater than a distance between the third hinge point and the fourth hinge point. The application is particularly applicable to electric or hybrid vehicles having an ERAD and a rear-wheel steering machine.

Inventors

  • LIU YANLONG

Assignees

  • 沃尔沃汽车公司

Dates

Publication Date
20260508
Application Date
20241106

Claims (11)

  1. 1. A suspension system (10) for a vehicle, comprising: a wheel frame (12) configured to be fitted to a wheel; A toe link (14) hinged to the wheel frame (12) at a first hinge point (a) and configured to be hinged to the frame, subframe or steering engine at a second hinge point (B); an integral link (18) hinged at one end to the wheel frame (12); a lower swing arm (16) hinged to the wheel frame (12) at a third hinge point (C), configured to be hinged to the frame or sub-frame at a fourth hinge point (D) and a fifth hinge point (E), and to the other end of the integral link (18), and A spring (28) and a damper (30) supported by the toe-in link (14) on a first virtual straight line (L1) passing through the first hinge point (A) and the second hinge point (B) and configured to be connected to the vehicle body, Wherein the toe-in link (14) is located closer to the lower swing arm (16) and rearward of the lower swing arm (16), the fourth hinge point (D) is closer to the toe-in link (14) than the fifth hinge point (E), and the spacing between the first hinge point (a) and the second hinge point (B) is greater than the spacing between the third hinge point (C) and the fourth hinge point (D).
  2. 2. Suspension system (10) for vehicles according to claim 1, characterized in that the spring (28) and the damper (30) are arranged side by side along a first virtual straight line (L1) to the toe-in link (14) such that the axis (S2) of the spring (28) intersects or is considered to intersect the first virtual straight line (L1) at a first intersection point (X1) and the axis (S1) of the damper (30) intersects or is considered to intersect the first virtual straight line (L1) at a second intersection point (X2), wherein the ratio of the spacing between the first intersection point (X1) and the second hinge point (B) to the spacing between the first hinge point (a) and the second hinge point (B) is not less than 0.6, and wherein the ratio of the spacing between the second intersection point (X2) and the second hinge point (B) to the spacing between the first hinge point (a) and the second hinge point (B) is not less than 0.5.
  3. 3. The suspension system (10) for a vehicle according to claim 2, wherein the toe-link (14) is stamped and formed to form a base (32) and two flanks (34, 36) projecting upwardly relative to the base (32), the two flanks (34, 36) being mutually opposed, the base (32) and the two flanks (34, 36) together defining an upwardly open continuous channel (38), wherein the continuous channel (38) contains a first recess (38 a) and a second recess (38B) located between and in communication with a first hinge point (a) and a second hinge point (B), the first recess (38 a) being closer to the first hinge point (a) than the second recess (38B), wherein a bottom of the damper (30) is received and held in the first recess (38 a) and a bottom of the spring (28) is received and held in the second recess (38B).
  4. 4. A suspension system (10) for a vehicle according to claim 3, characterized in that the toe-in link (14) has at least one of the following features: the toe link (14) has one or more bridges connected to the two flanks (34, 36) to increase the structural strength of the toe link (14) while forming a part of the upper edge of the first recess (38 a) and a part of the upper edge of the second recess (38 b); The width of the toe link (14) defined by the upper edges of the two flanks (34, 36) in a direction perpendicular to the first virtual line increases gradually and then decreases gradually from the first hinge point (a) to the second hinge point (B); The toe-in link (14) has a symmetrical shape with respect to a first virtual straight line (L1), and The top and/or bottom of the spring (28) is connected to the vehicle body by means of a pad (42), the pad (42) having a pad body (42 a) and a tapered tip (42 b), wherein one side of the pad body (42 a) is fixed to the top and/or bottom of the spring (28), the tapered tip (42 b) protrudes along the axis of the pad (42) on the other side of the pad body (42 a), and the outer peripheral surface of the tapered tip (42 b) forms a plurality of fins (44) uniformly distributed around the axis of the pad (42).
  5. 5. Suspension system (10) for vehicles according to claim 1, characterized in that the spring (28) is fitted on the end of the damper (30) near the top, the bottom of the damper (30) being arranged on the toe-in link (14) on a first virtual straight line (L1) such that the axis (S1) of the damper (30) intersects or is considered to intersect the first virtual straight line (L1) at a first intersection point (X1), wherein the ratio of the spacing between the first intersection point (X1) and the second hinge point (B) to the spacing between the first hinge point (a) and the second hinge point (B) is not less than 0.6.
  6. 6. The suspension system (10) for a vehicle of claim 5, wherein the toe-link (14) is stamped and formed to form a base (32) and two wings (34, 36) projecting upwardly relative to the base (32), the two wings (34, 36) being opposed to one another, the base (32) and the two wings (34, 36) together defining an upwardly open continuous channel (38), wherein a bottom portion of the damper (30) is received and retained in the continuous channel (38).
  7. 7. The suspension system (10) for a vehicle of claim 6, wherein the toe-in link (14) has at least one of the following characteristics: The toe link (14) has one or more bridges connected to the two flanks (34, 36) to increase the structural strength of the toe link (14); The width of the toe link (14) defined by the upper edges of the two flanks (34, 36) in a direction perpendicular to the first virtual line remains substantially constant from the first hinge point (A) to the second hinge point (B), and The toe-in link (14) has a symmetrical shape with respect to a first virtual straight line (L1).
  8. 8. Suspension system (10) for vehicles according to any one of claims 1 to 7, characterized in that the lower swing arm (16) has an arm body (41) and a tab (45) connected to the arm body (41), the main surface of the arm body (41) being defined by a third hinge point (C), a fourth hinge point (D) and a fifth hinge point (E), and the tab (45) being hinged to the other end of the integral link (18) at a sixth hinge point (F), the integral link (18) being substantially perpendicular to the main surface of the arm body (41) when the wheel is turned.
  9. 9. Suspension system (10) for a vehicle according to any of claims 1 to 7, characterized in that the suspension system (10) further has at least one of the following features: The distance between the third hinge point (C) and the fourth hinge point (D) is greater than half the distance between the first hinge point (A) and the second hinge point (B); The distance between the first hinge point (A) and the second hinge point (B) is larger than the distance between the third hinge point (C) and the fifth hinge point (E); When the front harness connecting rod (14) is hinged to the frame, the auxiliary frame or the steering machine by a second hinge point (B), the second hinge point (B) is offset backwards and/or upwards relative to the first hinge point (A); When the lower swing arm (16) is hinged to the frame or the subframe at a fourth hinge point (D) and a fifth hinge point (E), the fourth hinge point (D) is offset rearward and/or upward relative to the third hinge point (C); an intersection point between the first virtual straight line (L1) and a second virtual straight line (L2) passing through the third hinge point (C) and the fourth hinge point (D) is located outside the wheel center (O), and When the lower swing arm (16) is hinged to the frame or sub-frame at a fourth hinge point (D) and a fifth hinge point (E), the fifth hinge point (E) is offset upwardly relative to the fourth hinge point (D).
  10. 10. Suspension system (10) for a vehicle according to any one of claims 1 to 7, characterized in that it further comprises an camber link (20), the camber link (20) being hinged to the wheel carrier (12) at a seventh hinge point (G) and being configured to be hinged to the frame or sub-frame at an eighth hinge point (H), wherein, when the lower swing arm (16) is hinged to the frame or sub-frame at a fourth hinge point (D) and a fifth hinge point (E) and when the wheel is pivoted, a third virtual straight line (L3) passing through the fourth hinge point (D) and the fifth hinge point (E) also passes through the first geometric point (T1), wherein a fourth virtual straight line (L4) passing through the seventh hinge point (G) and the eighth hinge point (H) intersects with a second virtual straight line (L2) passing through the third hinge point (C) and the fourth hinge point (D) at a second geometric point (T2), a fifth virtual straight line (L5) passing through the first hinge point (a) and the third hinge point (C) intersects with a fourth straight line (L3) passing through the fourth hinge point (T) and the fourth straight line (L) at a fourth point (T3), and a seventh virtual straight line (L7) passing through the second geometric point (T2) and the third geometric point (T3) intersects the vehicle longitudinal section passing through the wheel center (O) at the first geometric point (T1).
  11. 11. Vehicle, characterized by comprising a suspension system (10) for a vehicle according to any of claims 1-10.

Description

Suspension system for vehicle and vehicle Technical Field The present application relates to the field of vehicles, and more particularly, to a suspension system for a vehicle and a vehicle. Background The main function of the suspension system for vehicles is to isolate noise and vibration while ensuring the handling and safety of the vehicle. Currently, suspension systems for vehicles, particularly rear suspension systems associated with rear wheels, are of a wide variety, for example, the rear suspension systems may include a multi-link independent suspension system that allows the rear wheels of the vehicle to bounce up and down and/or steer in response to bumps and bumps on the road surface. In the prior art, there is a type of multi-link independent suspension system that can generally hinge a frame or sub-frame to a wheel frame by a lower swing arm, an camber link, an integral link, and a toe link located forward of the lower swing arm to enable relative movement between the frame or sub-frame and the wheel frame, wherein a damper and spring would be supported by the lower swing arm and connected to the vehicle body for mitigating the effects of rear wheel shock. Therefore, the lower swing arm is relatively large in size, and the influence of the weight of the part on unsprung (under the spring) quality is considered, so that the lower swing arm is usually formed by hollow casting, and the lower swing arm is difficult to manufacture and high in cost. Moreover, for electric or hybrid vehicles having an electric rear Axle Drive system (ELECTRIC REAR Axle Drive), and a rear wheel steering machine, a considerable amount of space behind the chassis will be occupied by the ERAD's, in particular electric motors, so that such vehicles are limited in the space available for arranging the front and rear wheel steering machines hinged to the front beam links when applying a multi-link independent suspension system of the type described above. Disclosure of Invention It is an object of the present application to provide a suspension system for a vehicle and a vehicle, which are particularly suitable for electric or hybrid vehicles with ERAD and rear-wheel steering. According to a first aspect of the present application there is provided a suspension system for a vehicle comprising a wheel frame configured to be fitted to a wheel, a toe-in link hinged to the wheel frame at a first hinge point and configured to be hinged to the frame, sub-frame or steering engine at a second hinge point, an integral link hinged to the wheel frame at one end, a lower swing arm hinged to the wheel frame at a third hinge point and configured to be hinged to the frame or sub-frame at a fourth hinge point and a fifth hinge point and to the other end of the integral link, and a spring and damper supported by the toe-in link on a first virtual straight line passing through the first hinge point and the second hinge point and configured to be connected to the vehicle body, wherein the toe-in link is closer to the lower swing arm and is located rearward of the lower swing arm, the fourth hinge point is closer to the toe-in link than the fifth hinge point, and the spacing between the first hinge point and the second hinge point is greater than the spacing between the third hinge point and the fourth hinge point. Optionally, the spring and the damper are disposed in parallel to the toe-in link along a first virtual straight line such that an axis of the spring intersects or is considered to intersect at a first intersection point with the first virtual straight line and an axis of the damper intersects or is considered to intersect at a second intersection point with the first virtual straight line, wherein a ratio of a spacing between the first intersection point and the second hinge point to a spacing between the first hinge point and the second hinge point is not less than 0.6, and wherein a ratio of a spacing between the second intersection point and the second hinge point to a spacing between the first hinge point and the second hinge point is not less than 0.5. Optionally, the toe link is press molded to form a base and two flanks projecting upwardly relative to the base, the two flanks being mutually opposed, the base and the two flanks together defining an upwardly open continuous channel, wherein the continuous channel contains a first recess and a second recess located between and in communication with a first hinge point and a second hinge point, the first recess being closer to the first hinge point than the second recess, wherein a bottom of the damper is received and retained in the first recess and a bottom of the spring is received and retained in the second recess. Optionally, the toe link has at least one feature that the toe link has one or more bridges connected to the two side wings to enhance structural strength of the toe link while forming a part of an upper edge of the first recess and a part of an upper edge of the