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EP-4238786-B1 - VEHICLE COMPRISING A SUSPENSION STRUCTURE

EP4238786B1EP 4238786 B1EP4238786 B1EP 4238786B1EP-4238786-B1

Inventors

  • LIU, Shuai

Dates

Publication Date
20260513
Application Date
20220706

Claims (14)

  1. A vehicle, wherein the vehicle comprises a suspension structure (1), comprising: a leaf spring assembly, comprising two leaf spring constructions (11) arranged in a front-to-rear direction, wherein both leaf spring constructions (11) are arranged transversely relative to a body structure, and the middle part of each leaf spring construction (11) is fixedly connected to the body structure; and each of the leaf spring constructions (11) is provided with two free ends (110) in a length direction, and each of the free ends (110) is provided with a first mounting portion (111); an upper arm (12), wherein one end of the upper arm (12) is rotatably connected to the body structure; a steering knuckle (13), wherein an upper end of the steering knuckle (13) is connected to the other end of the upper arm (12) via a first connecting mechanism (15); and a lower end of the steering knuckle (13) is connected to the first mounting portions (111) of the two leaf spring constructions (11) via a second connecting mechanism (16); and characterized in that each of the free ends (110) is provide with a second mounting portion (112), and that the suspension structure further comprises a shock absorber (14), wherein an upper end of the shock absorber (14) is connected to the body structure; and a lower end of the shock absorber (14) is connected to the second mounting portions (112) of the two leaf spring constructions (11) via a third connecting mechanism (17).
  2. The vehicle according to claim 1, wherein the first mounting portion (111) comprises a first lifting eye (111a); and the second connecting mechanism (16) comprises a first shaft (162) and a first ball joint mechanism (161), wherein two ends of the first shaft (162) are hinged to the first lifting eyes (111a) of the two leaf spring constructions (11); and the first ball joint mechanism (161) is connected to the middle part of the first shaft (162) and the lower end of the steering knuckle (13).
  3. The vehicle according to claim 1 or 2, wherein the second mounting portion (112) comprises a second lifting eye (112a); and the third connecting mechanism (17) comprises a second shaft (171); two ends of the second shaft (171) are hinged to the second lifting eyes (112a) of the two leaf spring constructions (11); and the lower end of the shock absorber (14) is connected to the middle part of the second shaft (171).
  4. The vehicle according to claim 2, wherein the first ball joint mechanism (161) comprises a ball joint base (161a) and a ball joint rod (161b), wherein the ball joint base (161a) is disposed at the middle part of the first shaft (162), the ball joint rod (161b) rotatably fits with the ball joint base (161a), and the ball joint rod (161b) is connected to the lower end of the steering knuckle (13).
  5. The vehicle according to claim 4, wherein a ball center of the ball joint rod (161b) is on an axis of the first shaft (162).
  6. The vehicle according to any one of claims 1 to 5, wherein the two leaf spring constructions (11) are provided symmetrically with respect to an intermediate plane, and an axis of the shock absorber (14) is located on the intermediate plane.
  7. The vehicle according to claim 2, wherein the leaf spring assembly further comprises a "U-shaped" bolt (18) configured to connect the middle part of the leaf spring construction (11) to the body structure.
  8. The vehicle according to claim 7, wherein the leaf spring assembly further comprises a reinforcement plate (19), wherein the reinforcement plate (19) is disposed under the two leaf spring constructions (11) and is configured to support the two leaf spring constructions (11); and the reinforcement plate (19) is connected to the body structure via the "U-shaped" bolt (18).
  9. The vehicle according to any one of claims 1 to 8, wherein the leaf spring construction (11) comprises: at least two leaf springs, wherein the at least two leaf springs are stacked along a vertical direction; the at least two leaf springs decrease in length gradually from the bottom upwards; the at least two leaf springs comprise a first leaf spring (113) and a second leaf spring (114); and length of the first leaf spring (113) is greater than length of the second leaf spring (114); a leaf spring connecting component (115), configured to fixedly connect body portions of the at least two leaf springs in the length direction; two first mounting portions (111), respectively disposed on two first free ends (110) of the first leaf spring (113) in the length direction; and two second mounting portions (112), respectively disposed on two second free ends (110) of the second leaf spring (114) in the length direction.
  10. The vehicle according to claim 9, wherein the first leaf spring (113) is disposed at the lowest part of the leaf spring construction (11).
  11. The vehicle according to claim 9, wherein the second leaf spring (114) is located above the first leaf spring (113).
  12. The vehicle according to claim 11, wherein the second leaf spring (114) and the first leaf spring (113) are adjacent or spaced apart.
  13. The vehicle according to any one of claims 9 to 12, wherein in the length direction, the two second mounting portions (112) are located between the two first mounting portions (111).
  14. The vehicle according to any one of claims 1 to 13, wherein the body structure is a vehicle body and/or a sub-chassis.

Description

This application claims priority to Chinese patent application No. 202122384667.4, filed on September 29, 2021 and entitled "SUSPENSION STRUCTURE AND VEHICLE". TECHNICAL FIELD This application relates to the field of vehicle technologies, in particular, to a vehicle comprising a suspension structure. BACKGROUND Suspension structure is a general term for all force-transferring connection means between a chassis and wheels of a vehicle, used to transfer forces and torques between the chassis and wheels, buffer the impact load transferred from irregularities in a road surface to the chassis, and attenuate the body vibration caused by the road impact, so as to ensure smooth driving of the vehicle. Traditional suspension structures include elastic elements, guide mechanisms, shock absorbers, and the like, and some also include buffer blocks, stabilizer bars, and the like. The elastic elements are typically springs, leaf springs, and the like. An elastic element of the leaf spring type generally includes a group of leaf springs. A suspension structure including one leaf spring construction as in the prior art has weak connection strength and is easy to break under an external impact. In addition, a suspension structure including only one group of leaf springs has poor stability, so a vehicle's body is easy to shake when the vehicle jolts. Therefore, how the connection strength and stability of a suspension structure are improved has become an urgent problem to be solved. CN 204 526 704 U relates to a transverse multi-plate leaf spring with balance bar rear axle assembly for vehicle. SUMMARY This application provides a vehicle comprising a suspension structure and is intended to improve the connection strength and stability of the suspension structure. A first aspect of this application provides a vehicle comprising a suspension structure, including a leaf spring assembly, an upper arm, a steering knuckle, and a shock absorber. The leaf spring assembly includes two leaf spring constructions arranged in a front-to-rear direction. Both leaf spring constructions are arranged transversely relative to a body structure, and the middle part of each leaf spring construction is fixedly connected to the body structure. Each of the leaf spring constructions is provided with two free ends in a length direction, and each of the free ends is provided with a first mounting portion and a second mounting portion. One end of the upper arm is rotatably connected to the body structure. An upper end of the steering knuckle is connected to the other end of the upper arm via a first connecting mechanism; and a lower end of the steering knuckle is connected to the first mounting portions of the two leaf spring constructions via a second connecting mechanism. An upper end of the shock absorber is connected to the body structure; and a lower end of the shock absorber is connected to the second mounting portions of the two leaf spring constructions via a third connecting mechanism. The leaf spring assembly includes two leaf spring constructions arranged in a front-to-rear direction, so connection strength of the entire suspension structure can be improved. In addition, the shock absorber is connected between the two leaf spring constructions and arranged on a bouncing central line of wheels, allowing the shock absorber to handle even force and effectively absorb shocks, thereby improving the stability of the suspension. In some embodiments, the first mounting portion includes a first lifting eye; and the second connecting mechanism includes a first shaft and a first ball joint mechanism. Two ends of the first shaft are hinged to the first lifting eyes of the two leaf spring constructions. The first ball joint mechanism is connected to the middle part of the first shaft and the lower end of the steering knuckle. The first mounting portion designed with the first lifting eye facilitates hinging to the first shaft and implements rotatable connection to the steering knuckle. The first ball joint mechanism can further expand the rotational range of the steering knuckle. In some embodiments, the second mounting portion includes a second lifting eye; and the third connecting structure includes a second shaft. Two ends of the second shaft are hinged to the second lifting eyes of the two leaf spring constructions; and the lower end of the shock absorber is connected to the middle part of the second shaft. The second mounting portion designed with the second lifting eye facilitates hinging to the second shaft and implements rotatable connection to the shock absorber. The shock absorber is connected to the middle part of the second shaft so that the shock absorber is located on the bouncing central line of wheels. In some embodiments, the first ball joint mechanism includes a ball joint base and a ball joint rod. The ball joint base is disposed at the middle part of the first shaft, the ball joint rod rotatably fits with the ball joint base, and the b