Single trailing arm type air spring suspension system and passenger car

Abstract

The utility model relates to the field of vehicle suspension devices, and discloses a single trailing arm type air spring suspension system and a passenger car. A single trailing arm type air spring suspension system comprises trailing arms and a Watt connecting rod mechanism, the trailing arms are arranged in a bilateral symmetry mode, the ends, hinged to a frame, of the trailing arms are frame ends, the other ends of the trailing arms are fixedly connected with an axle to form axle ends, and the Watt connecting rod mechanism is located between the two trailing arms and comprises a rocker arm, a first transverse guide rod and a second transverse guide rod. One end of the first transverse guide rod and one end of the second transverse guide rod are hinged to the longitudinal arms on the two sides respectively, the other ends are hinged to the two ends of the rocker arm, and the middle of the rocker arm is provided with a hinge structure hinged to a frame. According to the scheme, the problems that in the prior art, the rigidity is low and the stability is poor due to the fact that the transverse left-right movement offset of the frame relative to the axle is large are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vehicle suspension device field especially relates to a single longitudinal arm formula air spring suspension system and passenger car. BACKGROUND

[0002] Suspension is an important component of all force transmission connecting devices between the frame and the wheel, its function is to transmit the force and torque between the wheel and the frame, and to buffer the impact force from the uneven road to the frame or the vehicle body, so as to ensure the smooth driving of the vehicle.

[0003] The current passenger car single longitudinal arm formula front air suspension structure as shown in the figure, including guide arm 3 and transverse thrust rod 4. Figure 1 Guide arm 3 is fixedly connected with axle 1, is hinged with frame 2, is used for transmitting longitudinal force, transverse thrust rod 4 is hinged with axle 1 and frame 2 respectively, and has 2-3 ° inclination, is used for transmitting transverse force.When frame 2 moves up and down relative to axle 1, it will do circular arc motion under the guidance of transverse thrust rod 4, that is, frame 2 moves up and down relative to axle 1, and also has a large motion offset in the left and right directions relative to axle 1, the stability is poor, the vehicle is prone to deviation, and the suspension system has low lateral stiffness, the vehicle has large lateral inclination when turning, especially when applied to passenger cars, the problem is more prominent. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a single longitudinal arm formula air spring suspension system to solve the problems of poor stability caused by the left and right movement of the frame relative to the axle and low lateral stiffness of the suspension system in the prior art, and aims at providing a passenger car using the single longitudinal arm formula air spring suspension system to solve the problems of easy deviation and low lateral stiffness of the passenger car using the single longitudinal arm formula front air suspension.

[0005] To achieve the above-mentioned purpose, a single longitudinal arm formula air spring suspension system in the utility model adopts the following technical scheme:

[0006] A single longitudinal arm formula air spring suspension system, including longitudinal arm, watt linkage mechanism, the longitudinal arm is symmetrically arranged left and right, the end of the longitudinal arm hinged with the frame is the frame end, and the other end is fixedly connected with the axle and is the axle end, the watt linkage mechanism is located between the two longitudinal arms, including rocker arm, first transverse guide rod, second transverse guide rod, one end of the first transverse guide rod and the second transverse guide rod is respectively hinged with the two longitudinal arms, the other end is hinged with the two ends of the rocker arm, and the middle part of the rocker arm has a hinged structure hinged with the frame.

[0007] The above-mentioned technical scheme has the beneficial effects that:

[0008] The utility model discloses on the basis of prior art makes replacement, replaces the horizontal thrust rod in prior art for watt linkage mechanism, is connected with the longitudinal arm through watt linkage mechanism and is hinged on the frame of the swing arm of watt linkage mechanism, and first horizontal guide rod and second horizontal guide rod are hinged with the longitudinal arm of both sides respectively, when the frame moves up and down relative to the axle, the up and down movement track of the swing arm of watt linkage mechanism is approximately straight line, make the lateral relative motion of the frame and axle be restricted, improve the stability of suspension system, reduce the risk of vehicle deviation. Meanwhile, when the vehicle turns, the swing arm swings, and the longitudinal arm is pulled or pushed through two horizontal guide rods, which increases the roll stiffness of the suspension system. Moreover, through the use of the watt linkage mechanism, the lateral stabilizer bar can be omitted while ensuring the roll stiffness, simplifying the suspension structure. The present scheme solves the problem of low stiffness and poor stability caused by the large lateral movement of the frame relative to the axle in the prior art.

[0009] Further, one end of the first horizontal guide rod and the second horizontal guide rod is hinged with the longitudinal arm on the axle end.

[0010] Further, the swing arm includes a frame hinge hole and an axle hinge hole, the frame hinge hole is located in the middle of the swing arm, and the axle hinge hole is located at the upper and lower ends of the swing arm and is symmetrically arranged with the frame hinge hole as the center.

[0011] Further, the swing arm includes a front plate and a rear plate, the front plate and the rear plate are identical in shape and have frame hinge holes and axle hinge holes, and the end of the first horizontal guide rod and the second horizontal guide rod is between the front plate and the rear plate.

[0012] Further, a bushing is arranged at each hinge.

[0013] To achieve the above-mentioned purpose, a passenger car in the utility model adopts the following technical scheme:

[0014] A passenger car includes a frame and a suspension system, the suspension system includes a longitudinal arm and a watt linkage mechanism, the longitudinal arm is symmetrically arranged left and right, one end of the longitudinal arm is hinged with the frame as a frame end, and the other end is fixedly connected with an axle as an axle end, the watt linkage mechanism is located between the two longitudinal arms and includes a swing arm, a first horizontal guide rod and a second horizontal guide rod, one end of the first horizontal guide rod and the second horizontal guide rod is hinged with the longitudinal arm of both sides, and the other end is hinged with the swing arm, and the swing arm is hinged on the frame.

[0015] The above-mentioned technical scheme has the following beneficial effects:

[0016] The utility model discloses on the basis of prior art has replaced, the transverse thrust rod of bus suspension system in prior art is replaced for watt connecting rod mechanism, and the vehicle frame is connected with the longitudinal arm through watt connecting rod mechanism, and the rocker arm of watt connecting rod mechanism is hinged on the vehicle frame, and the first transverse guide rod and the second transverse guide rod are hinged with the longitudinal arm of both sides respectively, when the vehicle frame moves up and down relative to the axle, the up-and-down movement track of the rocker arm of watt connecting rod mechanism is approximately straight line, so that the transverse relative movement of the vehicle frame and the axle is limited, improves the stability of suspension system, and reduces the risk of vehicle deviation. Meanwhile, when the vehicle turns, the rocker arm swings, and the longitudinal arm is pulled or pushed through two transverse guide rods, and the roll stiffness of suspension system is increased. Moreover, through the use of watt connecting rod mechanism, the lateral stability bar can be saved while ensuring the roll stiffness, and the suspension structure is simplified. The scheme solves the problems of easy deviation and low roll stiffness of the vehicle in prior art.

[0017] Further, one end of the first transverse guide rod and the second transverse guide rod is respectively hinged with the longitudinal arm at the axle end.

[0018] Further, the rocker arm comprises a vehicle frame hinged hole and an axle hinged hole, the vehicle frame hinged hole is located in the middle of the rocker arm, and the axle hinged hole is located at the upper and lower ends of the rocker arm and is symmetrically arranged with the vehicle frame hinged hole as the center.

[0019] Further, the rocker arm comprises a front plate and a rear plate, the front plate and the rear plate are identical in shape and both have a vehicle frame hinged hole and an axle hinged hole, and the end of the first transverse guide rod and the second transverse guide rod is between the front plate and the rear plate.

[0020] Further, a bushing is arranged at each hinge. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic view of a single longitudinal arm type front air suspension structure in prior art.

[0022] Figure 2 It is a schematic view of a single longitudinal arm type air spring suspension system in the utility model.

[0023] Figure 3 It is a structure schematic view of a watt connecting rod mechanism of a single longitudinal arm type air spring suspension system in the utility model.

[0024] Figure 4 It is a structure schematic view of a rocker arm of a watt connecting rod mechanism of a single longitudinal arm type air spring suspension system in the utility model.

[0025] Figure 5 It is a movement track schematic view of a watt connecting rod mechanism of a single longitudinal arm type air spring suspension system in the utility model.

[0026] Figure 1 In the middle: 1. Axle; 2. Frame; 3. Guide arm; 4. Lateral thrust bar; 5. Lateral stabilizer bar.

[0027] Figures 2-5 In the middle: 1. Axle; 2. Air spring; 21. Airbag; 22. Airbag cover; 23. Airbag base; 3. Trailing arm; 31. Axle end; 32. Frame end; 33. Guide rod hinge hole; 4. Rocker arm; 41. Axle hinge hole; 42. Frame hinge hole; 43. Front plate; 44. Rear plate; 51. First lateral guide rod; 52. Second lateral guide rod; 6. Shock absorber; 7. Bracket. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0031] Specific embodiment 1 of the single trailing arm air spring suspension system of this utility model:

[0032] like Figures 2-4 As shown, the single trailing arm air spring suspension system includes an axle 1, an air spring 2, and trailing arms 3. Two trailing arms 3 are symmetrically arranged on the left and right sides. One end of the trailing arm 3 is a frame end 32 that is hinged to the vehicle frame (not shown in the figure), and the end of the trailing arm 3 near the axle 1 is the axle end 31. The trailing arm 3 is fixedly connected to the axle 1 at the axle end 31 by bolts. The air spring 2 includes an airbag cover 22, an airbag 21, and an airbag base 23 from top to bottom. The airbag base 23 is located at the bottom of the airbag 21 and is fixedly connected to the axle end 31. The airbag cover 22 is located above the airbag 21 and is connected to the vehicle frame (not shown in the figure), so that the entire air spring 2 is located between the vehicle frame and the axle 1.

[0033] like Figure 2As shown, the axle end 31 is also fixedly mounted with a bracket 7, which is symmetrically arranged on the left and right sides corresponding to the trailing arm 3. The bracket 7 is fixedly connected to the axle 7 by bolts, and the top of the bracket 7 is fixedly connected to the air bag base 23, so that the air spring 2 can be fixedly connected to the axle 1 at the axle end 31.

[0034] As shown in the figure, Figure 2 The bracket 7 is hingedly connected with a shock absorber 6 on the outer side of the axle end 31, and the shock absorber 6 is located on the front side of the air spring 2. The top of the shock absorber 6 is hingedly connected to the frame (not shown in the figure). When the frame moves up and down relative to the axle, the shock absorber 6 first plays a damping and buffering role, and protects the entire suspension system including the air spring 2.

[0035] In order to ensure the stability of the axle 1 and the frame, reduce the deviation of the left and right movements of the frame and the axle, and improve the stiffness of the suspension system, the single trailing arm type air spring suspension system further comprises a Watt linkage mechanism. The Watt linkage mechanism is a mature three-link mechanism in the prior art, as shown in the figure, Figures 2-4 The Watt linkage mechanism is located between the axle ends 31 of the two trailing arms 3, and the Watt linkage mechanism comprises a rocker arm 4 and first and second transverse guide rods 51 and 52 located on both sides of the rocker arm 4. The first transverse guide rod 51 is located on the left side of the rocker arm 4, and the second transverse guide rod 52 is located on the right side of the rocker arm 4. The left end of the first transverse guide rod 51 and the right end of the second transverse guide rod 52 are respectively hingedly connected to the two trailing arms 3 on the inner side of the axle end 31 through the guide rod hinge hole 33. The right end of the first transverse guide rod 51 and the left end of the second transverse guide rod 52 are hingedly connected to the rocker arm 4. The middle part of the rocker arm 4 has a hinge structure hingedly connected to the frame (not shown in the figure).

[0036] As shown in the figure, Figures 2-4 The rocker arm 4 comprises a front plate 43 and a rear plate 44, and the front plate 43 and the rear plate 44 are completely identical in shape and both have a frame hinge hole 42 and an axle hinge hole 41. The frame hinge hole 42 is located on the hinge structure in the middle part of the front plate 43 and the rear plate 44, and the hinge structure further comprises a longitudinal axis (not shown in the figure) passing through the frame hinge hole 42 and parallel to the trailing arm 3. The frame is hingedly connected to the longitudinal axis, so that the frame is hingedly connected to the rocker arm 4. The front plate 43 and the rear plate 44 also have the axle hinge hole 41, which is provided with two axle hinge holes 41 symmetrically arranged above and below the frame hinge hole 42. The right end of the first transverse guide rod 51 is hingedly connected to the upper axle hinge hole 41 between the front plate 43 and the rear plate 44, and the left end of the second transverse guide rod 52 is hingedly connected to the lower axle hinge hole 41 between the front plate 43 and the rear plate 44. The two transverse guide rods are located on the same side of the rocker arm 4, i.e. between the front plate 43 and the rear plate 44.

[0037] In the embodiment, rubber bushings are arranged between each hinge shaft and shaft hole to buffer the impact between the hinge shaft and the shaft hole, and the rubber bushings also have the buffering and lubricating effects.

[0038] The suspension system of the utility model adopts the Watt four-bar linkage as the guide mechanism and the transverse stabilizing mechanism, can make the relative movement of the two components connected by the rocker arm 4 as much as possible on a straight line, as shown in the figure, Figure 5 The movement track of the midpoint of the rocker arm 4 relative to the bracket 7 is approximately a straight line in the up-down direction, that is, when the vehicle frame moves up and down relative to the axle 1, the left-right offset is very small, and the relative movement track of the vehicle frame and the axle 1 is basically in the vertical direction, which can improve the stability of the vehicle and reduce the risk of vehicle deviation. When the vehicle body makes counterclockwise roll movement, the rocker arm 4 in the middle of the Watt four-bar linkage rotates counterclockwise, pushes the first transverse guide rod 51 and the second transverse guide rod 52 at both ends to move outward, that is, pushes the trailing arm 3 and the bracket 7 to move outward, deforms the bushing and the trailing arm 3 in the transverse direction, and increases the roll stiffness of the suspension system. Similarly, when the vehicle body makes clockwise roll movement, the rocker arm 4 pulls the trailing arm 3 and the bracket 7 at both ends to move inward, and also converts the roll movement of the vehicle frame relative to the axle 1 into the transverse deformation of the bushing and the trailing arm 3, reduces the roll degree of the vehicle, and reduces the risk of vehicle deviation.

[0039] In other embodiments of the single trailing arm type air spring suspension system in the utility model, the difference between the embodiment and the above-mentioned embodiment 1 is that the rocker arm 4 is no longer provided with the front plate 43 and the rear plate 44, but is a one-piece structure. Both transverse guide rods are hinged to the front side of the axle hinge hole 41 of the rocker arm 4. The vehicle frame is hinged to the rear side of the vehicle frame hinge hole 42 of the rocker arm 4 through a longitudinal shaft.

[0040] In other embodiments of the single trailing arm type air spring suspension system in the utility model, the difference between the embodiment and the above-mentioned embodiment 1 is that the rocker arm 4 is no longer provided with the front plate 43 and the rear plate 44, but is a one-piece structure. Both transverse guide rods are hinged to the front side of the axle hinge hole 41 of the rocker arm 4. The vehicle frame is hinged to the rear side of the vehicle frame hinge hole 42 of the rocker arm 4 through a longitudinal shaft.

[0041] In other embodiments of the single trailing arm type air spring suspension system in the utility model, the difference between the embodiment and the above-mentioned embodiment 1 is that the rocker arm 4 is no longer provided with the front plate 43 and the rear plate 44, but is a one-piece structure. Both transverse guide rods are hinged to the front side of the axle hinge hole 41 of the rocker arm 4. The vehicle frame is hinged to the rear side of the vehicle frame hinge hole 42 of the rocker arm 4 through a longitudinal shaft.

[0042] In other embodiments of the single longitudinal arm type air spring suspension system of the utility model, the difference between the embodiment and the above embodiment 1 is that the two transverse guide rods are arranged outside the front plate 43 and the rear plate 44 of the rocker arm 4, that is, the right end of the first transverse guide rod 51 is hinged at the front side of the front plate 43 of the rocker arm 4, the left end of the second transverse guide rod 52 is hinged at the rear side of the rear plate 44 of the rocker arm 4, and the front plate 43 is fixedly connected with the rear plate 44. The frame is hinged on the longitudinal shaft between the frame hinge holes 42 of the front plate 43 and the rear plate 44.

[0043] In other embodiments of the single longitudinal arm type air spring suspension system of the utility model, the difference between the embodiment and the above embodiment 1 is that the rocker arm 4 is no longer provided with the front plate 43 and the rear plate 44, but is an integral structure. The right end of the first transverse guide rod 51 is hinged at the front side axle hinge hole 41 of the rocker arm 4, and the left end of the second transverse guide rod 52 is hinged at the rear side axle hinge hole 41 of the rocker arm 4.

[0044] In other embodiments of the single longitudinal arm type air spring suspension system of the utility model, the difference between the embodiment and the above embodiment 1 is that the rocker arm 4 is no longer provided with the front plate 43 and the rear plate 44, but is an integral structure. The right end of the first transverse guide rod 51 is hinged at the front side axle hinge hole 41 of the rocker arm 4, and the left end of the second transverse guide rod 52 is hinged at the rear side axle hinge hole 41 of the rocker arm 4.

[0045] In a specific embodiment of the utility model, a passenger car comprises a frame and a suspension system, the structure of the suspension system is the same as that of the single longitudinal arm type air spring suspension system in any one of the above embodiments, and details are not repeated.

[0046] The above is only a preferred embodiment of the utility model, and does not limit the utility model, the patent protection scope of the utility model is subject to the claims, and equivalent structural changes made by applying the contents of the specification and drawings of the utility model should also be included in the protection scope of the utility model.

Claims

1. A single trailing arm air spring suspension system characterized by, The invention relates to a suspension system, comprising a frame and a suspension system, the suspension system comprising a pair of longitudinal arms, a Watt linkage, the longitudinal arms being arranged symmetrically left and right, one end of the longitudinal arms being hingedly connected to the frame as a frame end, the other end being fixedly connected to the axle as an axle end, the Watt linkage being located between the two longitudinal arms, comprising a rocker arm, a first transverse guide rod and a second transverse guide rod, one end of the first transverse guide rod and the second transverse guide rod being hingedly connected to the two longitudinal arms respectively, the other end being hingedly connected to the two ends of the rocker arm, the middle part of the rocker arm having a hinged structure hingedly connected to the frame.

2. A single trailing arm air spring suspension system as set forth in claim 1 wherein, One end of the first transverse guide rod and the second transverse guide rod is hingedly connected to the two longitudinal arms at the axle end respectively.

3. A single trailing arm air spring suspension system as set forth in claim 1 wherein, The rocker arm comprises a frame hinged hole and an axle hinged hole, the frame hinged hole being located in the middle part of the rocker arm, the axle hinged hole being located at the upper and lower ends of the rocker arm and being symmetrically arranged with the frame hinged hole as the center.

4. A single trailing arm air spring suspension system as set forth in claim 3 wherein, The rocker arm comprises a front plate and a rear plate, the front plate and the rear plate being identical in shape and both having a frame hinged hole and an axle hinged hole, the end of the first transverse guide rod and the second transverse guide rod being located between the front plate and the rear plate.

5. A single trailing arm air spring suspension system as set forth in any of claims 1-4, characterized in that, Each hinged part is provided with a bushing.

6. A passenger vehicle characterized by The invention relates to a suspension system, comprising a frame and a suspension system, the suspension system comprising a pair of longitudinal arms, a Watt linkage, the longitudinal arms being arranged symmetrically left and right, one end of the longitudinal arms being hingedly connected to the frame as a frame end, the other end being fixedly connected to the axle as an axle end, the Watt linkage being located between the two longitudinal arms, comprising a rocker arm, a first transverse guide rod and a second transverse guide rod, one end of the first transverse guide rod and the second transverse guide rod being hingedly connected to the two longitudinal arms respectively, the other end being hingedly connected to the two ends of the rocker arm, the middle part of the rocker arm having a hinged structure hingedly connected to the frame.

7. A passenger vehicle as claimed in claim 6, wherein, One end of the first transverse guide rod and the second transverse guide rod is hingedly connected to the two longitudinal arms at the axle end respectively.

8. A passenger vehicle as claimed in claim 6, wherein, The rocker arm comprises a frame hinged hole and an axle hinged hole, the frame hinged hole being located in the middle part of the rocker arm, the axle hinged hole being located at the upper and lower ends of the rocker arm and being symmetrically arranged with the frame hinged hole as the center.

9. A passenger vehicle as claimed in claim 8, wherein, The rocker arm comprises a front plate and a rear plate, the front plate and the rear plate being identical in shape and both having a frame hinged hole and an axle hinged hole, the end of the first transverse guide rod and the second transverse guide rod being located between the front plate and the rear plate.

10. A passenger vehicle according to any one of claims 6 to 9, characterized in that Each hinged part is provided with a bushing.

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