An automotive rear suspension structure and an automobile

Abstract

The present invention discloses an automotive rear suspension structure and an automobile. The automotive rear suspension structure includes a front upper arm, a front lower arm, a rear upper arm, a rear lower arm, a toe control arm, a subframe and a steering knuckle; the front upper arm includes a first connecting shaft and a second connecting shaft, the first connecting shaft is connected to the steering knuckle, and the second connecting shaft is connected to the subframe; a third connecting shaft in the front lower arm is connected to the steering knuckle, and a fourth connecting shaft is connected to the subframe; a fifth connecting shaft in the rear upper arm is connected to the steering knuckle, and a sixth connecting shaft is connected to the subframe; a seventh connecting shaft in the rear lower arm is connected to the steering knuckle, and an eighth connecting shaft is connected to the subframe; a ninth connecting shaft in the toe control arm is connected to the steering knuckle, and a tenth connecting shaft is connected to the subframe. By setting the coordinate ranges of the key control points on the front upper arm, rear upper arm, rear lower arm and toe control arm in the automotive rear suspension, the overall layout scheme of the automotive rear suspension structure is improved, so that the distance between the rear cross beam on the subframe and the rear wheel center can meet the rearward movement of the drive motor, thereby increasing the space for the second-row seats.

Description

Technical Field

[0001] The present invention belongs to the technical field of automotive suspensions, and relates to an automotive rear suspension structure and an automobile. Background Art

[0002] An automotive suspension is an important system for transmitting vertical, longitudinal, and lateral forces to the vehicle body. During vehicle operation, the suspension system plays an important role in the handling stability and comfort of the entire vehicle. More and more vehicle models have a multi-link rear suspension structure. Intermediate vehicles generally use a four-link structure, and large and medium-sized vehicles generally use a five-link structure. In the existing five-link rear suspension solutions, it is difficult to balance the avoidance of wheel jounce and the anti-pitching of the vehicle body, and the layout of the five links will limit the X-direction position of the vehicle's drive motor, sacrificing the X-direction space of the second row. Summary of the Invention

[0003] The purpose of the present invention is to solve the problem that the layout scheme of the five-link rear suspension in the prior art will limit the X-direction position of the vehicle's drive motor, thereby sacrificing the space of the second-row seats, and to provide an automotive rear suspension structure and an automobile.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] An automotive rear suspension structure includes a front upper arm, a front lower arm, a rear upper arm, a rear lower arm, a toe control arm, a subframe, and a steering knuckle;

[0006] The front upper arm includes a first connecting shaft and a second connecting shaft. The first connecting shaft connects the steering knuckle, and the second connecting shaft connects the subframe. The central coordinates of the second connecting shaft are 2898 - 2888 mm, -411 - -421 mm, 77 - 87 mm;

[0007] The front lower arm includes a third connecting shaft and a fourth connecting shaft. The third connecting shaft connects the steering knuckle, and the fourth connecting shaft connects the subframe. The central coordinates of the fourth connecting shaft are 2718 - 2728 mm, -493 - -503 mm, -86 - -96 mm;

[0008] The rear upper arm includes a fifth connecting shaft and a sixth connecting shaft. The fifth connecting shaft connects the steering knuckle, and the sixth connecting shaft connects the subframe. The central coordinates of the sixth connecting shaft are 3287 - 3297 mm, -390 - -400 mm, 72 - 82 mm;

[0009] The rear lower arm includes a seventh connecting shaft and an eighth connecting shaft. The seventh connecting shaft connects the steering knuckle, and the eighth connecting shaft connects the subframe. The central coordinates of the eighth connecting shaft are 3159 - 3169 mm, -263 - -273 mm, -144 - -154 mm;

[0010] The front tie rod includes a ninth connecting shaft and a tenth connecting shaft. The ninth connecting shaft is connected to the steering knuckle, and the tenth connecting shaft is connected to the subframe.

[0011] A further improvement of the present invention lies in:

[0012] The subframe is connected to the vehicle body through an eleventh connecting shaft and a twelfth connecting shaft.

[0013] The coordinates of the connection point of the twelfth connecting shaft and the vehicle body are 3330 - 3340 mm, -505 - -515 mm, 61 - 71 mm.

[0014] One end of the rear lower arm is connected to the spring, and the other end of the spring is connected to the vehicle body.

[0015] One end of the rear lower arm is connected to the shock absorber, and the other end of the shock absorber is connected to the vehicle body.

[0016] The first connecting shaft, the third connecting shaft, the fifth connecting shaft, the seventh connecting shaft and the ninth connecting shaft are respectively hinged to the steering knuckle.

[0017] The second connecting shaft, the fourth connecting shaft, the sixth connecting shaft, the eighth connecting shaft and the tenth connecting shaft are respectively hinged to the subframe.

[0018] A vehicle, comprising the vehicle rear suspension structure described in any one of the preceding items.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] By setting the coordinate ranges of the key control points on the front upper arm, rear upper arm, rear lower arm and front tie rod in the vehicle rear suspension, the overall layout scheme of the vehicle rear suspension structure is improved, so that the distance between the rear cross beam on the subframe and the rear wheel center can meet the rearward movement of the drive motor, thereby increasing the seat space in the second row.

[0021] Furthermore, the vehicle rear suspension structure in the present invention can change the coordinates in the X direction, thereby realizing the change of the wheelbase of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0023] Figures 1 to 4 It is a three-dimensional structure schematic diagram of the vehicle rear suspension system of the present invention;

[0024] Figure 5Schematic coordinate diagram of wheel avoidance for the rear suspension structure of the vehicle of the present invention;

[0025] Figure 6 Schematic diagram of the X-direction avoidance position of the rear suspension structure of the vehicle of the present invention.

[0026] Wherein: 1-front upper arm, 2-front lower arm, 3-rear upper arm, 4-rear lower arm, 5-toe link, 6-subframe, 7-steering knuckle, 8-spring, 9-shock absorber, 101-first connecting shaft, 102-second connecting shaft; 201-third connecting shaft; 202-fourth connecting shaft; 301-fifth connecting shaft; 302-sixth connecting shaft; 401-seventh connecting shaft; 402-eighth connecting shaft; 501-ninth connecting shaft; 502-tenth connecting shaft; 601-eleventh connecting shaft; 602-twelfth connecting shaft; 603-rear cross member. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] It should be noted that: like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0030] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0031] In addition, when the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and it does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0032] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, when the terms "arranged", "installed", "connected", and "coupled" appear, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The present invention will be further described in detail below with reference to the accompanying drawings:

[0034] See Figures 1-4 , which is a three-dimensional schematic diagram of an automotive rear suspension structure of the present invention, including a front upper arm 1, a front lower arm 2, a rear upper arm 3, a rear lower arm 4, a toe control arm 5, a subframe 6, a steering knuckle 7, a spring 8, and a shock absorber 9; define the vehicle body length direction as the first direction X, the vehicle body width direction as the second direction Y, and the vehicle body height direction as the third direction Z, and the three directions are perpendicular to each other. A rectangular coordinate system is established with the first, second, and third directions. The first direction X is positive in the rearward direction of the vehicle body, the second direction Y is positive in the co-pilot position direction, and the third direction Z is positive in the upward direction of the vehicle body. The origin of the rectangular coordinate system is located at the midpoint of the line connecting the centers of the two front wheels.

[0035] The front upper arm 1 includes a first connecting shaft 101 and a second connecting shaft 102. The first connecting shaft 101 is connected to the steering knuckle 7, and the second connecting shaft 102 is connected to the subframe 6. The second connecting shaft 102 is a key control point, and the central coordinates of the second connecting shaft 102 are 2898 - 2888 mm, -411 - -421 mm, 77 - 87 mm. The front lower arm 2 includes a third connecting shaft 201 and a fourth connecting shaft 202. The third connecting shaft 201 is connected to the steering knuckle 7, and the fourth connecting shaft 202 is connected to the subframe 6. The fourth connecting shaft 202 is a key control point, and the central coordinates of the fourth connecting shaft 202 are 2718 - 2728 mm, -493 - -503 mm, -86 - -96 mm. The rear upper arm 3 includes a fifth connecting shaft 301 and a sixth connecting shaft 302. The fifth connecting shaft 301 is connected to the steering knuckle 7, and the sixth connecting shaft 302 is connected to the subframe 6. The sixth connecting shaft 302 is a key control point, and the central coordinates of the sixth connecting shaft 302 are 3287 - 3297 mm, -390 - -400 mm, 72 - 82 mm. The rear lower arm 4 includes a seventh connecting shaft 401 and an eighth connecting shaft 402. The seventh connecting shaft 401 is connected to the steering knuckle 7, and the eighth connecting shaft 401 is connected to the subframe 6. The eighth connecting shaft 402 is a key control point, and the central coordinates of the eighth connecting shaft are 3159 - 3169 mm, -263 - -273 mm, -144 - -154 mm. The toe link 5 includes a ninth connecting shaft 501 and a tenth connecting shaft 502. The ninth connecting shaft 501 is connected to the steering knuckle 7, and the tenth connecting shaft is connected to the subframe 6. Among them, the first connecting shaft 101, the third connecting shaft 201, the fifth connecting shaft 301, the seventh connecting shaft 401, and the ninth connecting shaft 501 are respectively hinged to the steering knuckle 7; the second connecting shaft 102, the fourth connecting shaft 202, the sixth connecting shaft 302, the eighth connecting shaft 402, and the tenth connecting shaft 502 are respectively hinged to the subframe 6. By setting the second connecting shaft 102 in the front upper arm 1, the fourth connecting shaft 202 in the front lower arm 2, the sixth connecting shaft 302 in the rear upper arm 3, and the eighth connecting shaft 402 in the rear lower arm 4 as key control points, and by defining the coordinate ranges of the key control points, the overall layout scheme of the automotive rear suspension structure is improved, so that the distance between the rear crossbeam on the subframe and the wheel center can meet the rearward movement of the drive motor, thereby increasing the space for the second-row seats.

[0036] The subframe 6 is connected to the vehicle body through an eleventh connecting shaft 601 and a twelfth connecting shaft 602. The coordinates of the connection point of the twelfth connecting shaft 602 and the vehicle body are 3330 - 3340 mm, -505 - -515 mm, 61 - 71 mm. It can better balance the wheel avoidance and the anti-body pitching performance. Refer to Figure 5 , which is the wheel avoidance curve graph.

[0037] The rear suspension structure of the vehicle in the present invention further includes a spring 8 and a shock absorber 9. The spring 8 and the shock absorber 9 are arranged oppositely. One end of the spring 8 and one end of the shock absorber 9 are respectively connected to the rear lower arm 4, and the other end of the spring 8 and the other end of the shock absorber 9 are respectively connected to the vehicle body.

[0038] See Figure 6 , which is a schematic diagram of the X-direction avoidance position of the vehicle rear suspension structure in the present invention. The subframe 6 in the vehicle rear suspension structure is designed as a frame structure. The rear crossbeam 603 is close to the twelfth connecting shaft 602 in the X direction of the whole vehicle. The distance ② between the front side of the rear crossbeam 603 and the rear wheel center in the X direction of the whole vehicle can reach 310 mm, which is convenient for the rearward movement of the drive motor, thereby increasing the seat space in the second row. The vehicle rear suspension structure in the present invention allows coordinate changes in the X direction to achieve changes in the wheelbase of the whole vehicle.

[0039] The embodiment of the present invention also provides a vehicle, which includes the vehicle rear suspension structure described in the above embodiment.

[0040] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automotive rear suspension structure, characterized in that, It includes a front upper arm (1), a front lower arm (2), a rear upper arm (3), a rear lower arm (4), a front tie rod (5), a subframe (6) and a steering knuckle (7); The front upper arm (1) includes a first connecting shaft (101) and a second connecting shaft (102). The first connecting shaft (101) is connected to the steering knuckle (7), and the second connecting shaft (102) is connected to the subframe (6). The central coordinates of the second connecting shaft (102) are 2898 - 2888 mm, -411 - -421 mm, 77 - 87 mm; The front lower arm (2) includes a third connecting shaft (201) and a fourth connecting shaft (202). The third connecting shaft (201) is connected to the steering knuckle (7), and the fourth connecting shaft (202) is connected to the subframe (6). The central coordinates of the fourth connecting shaft (202) are 2718 - 2728 mm, -493 - -503 mm, -86 - -96 mm; The rear upper arm (3) includes a fifth connecting shaft (301) and a sixth connecting shaft (302). The fifth connecting shaft (301) is connected to the steering knuckle (7), and the sixth connecting shaft (302) is connected to the subframe (6). The central coordinates of the sixth connecting shaft (302) are 3287 - 3297 mm, -390 - -400 mm, 72 - 82 mm; The rear lower arm (4) includes a seventh connecting shaft (401) and an eighth connecting shaft (402). The seventh connecting shaft (401) is connected to the steering knuckle (7), and the eighth connecting shaft (402) is connected to the subframe (6). The central coordinates of the eighth connecting shaft (402) are 3159 - 3169 mm, -263 - -273 mm, -144 - -154 mm; The front tie rod (5) includes a ninth connecting shaft (501) and a tenth connecting shaft (502). The ninth connecting shaft (501) is connected to the steering knuckle (7), and the tenth connecting shaft (502) is connected to the subframe (6); The subframe (6) is connected to the vehicle body through an eleventh connecting shaft (601) and a twelfth connecting shaft (602); The coordinates of the connection point of the twelfth connecting shaft (602) and the vehicle body are 3330 - 3340 mm, -505 - -515 mm, 61 - 71 mm.

2. The automotive rear suspension structure according to claim 1, characterized in that, One end of a spring (8) is connected to the rear lower arm (4), and the other end of the spring (8) is connected to the vehicle body.

3. A rear suspension structure of an automobile according to claim 1, characterized in that, One end of a shock absorber (9) is connected to the rear lower arm (4), and the other end of the shock absorber (9) is connected to the vehicle body.

4. A rear suspension structure of an automobile according to claim 1, characterized in that, The first connecting shaft (101), the third connecting shaft (201), the fifth connecting shaft (301), the seventh connecting shaft (401) and the ninth connecting shaft (501) are respectively hinged to the steering knuckle (7).

5. The structure of a rear suspension of an automobile according to claim 1, characterized in that The second connecting shaft (102), the fourth connecting shaft (202), the sixth connecting shaft (302), the eighth connecting shaft (402) and the tenth connecting shaft (502) are respectively hinged to the subframe (6).

6. An automobile, characterized in that, It includes the automotive rear suspension structure according to any one of claims 1 - 5.

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