A medium truck cab suspension

Abstract

The present invention provides a medium-sized truck cab suspension, including a front suspension assembly and a rear suspension assembly, wherein the rear suspension assembly includes a left rear suspension assembly and a right rear suspension assembly, and left and right rear suspension upper brackets; the front suspension assembly includes left and right front suspension upper bracket assemblies, left and right flip arms, stabilizer bars, shock absorbers, shock absorber lower brackets, and limit blocks. The front and rear suspensions of the present invention both use components such as shock absorbers that can greatly absorb impacts and attenuate vibrations, thereby improving the cab suspension of medium-sized commercial vehicles from the original semi-floating suspension to four-point full floating, which has a good vibration isolation effect, improves the vibration isolation rate of the cab of medium-sized commercial vehicles, and improves driving comfort.

Description

Technical Field

[0001] The invention patent relates to the technical field of automobile parts, and specifically to a medium-sized truck cab suspension. Background Art

[0002] With the booming development of e-commerce, logistics, and transportation, medium-duty trucks are playing an increasingly important role in the transportation of light-weight cargo, especially in short-distance transportation within 1,000 kilometers. As a result, users have higher requirements for the comfort and convenience of medium-duty truck cabs.

[0003] Existing medium-sized truck suspensions all adopt semi-floating suspensions, in which the two supporting points in front of the driver are hinged and fixed with rubber vibration isolation pads, and the rear suspension adopts spring damping elements to form a floating connection. However, the rubber suspension at the supporting point in front of the cab has low damping and high dynamic stiffness due to the nonlinearity of the rubber itself, which makes the overall vibration isolation effect of the suspension weak, the comfort of the driver and passengers is not ideal, and cannot meet people's pursuit of driving comfort. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a cab suspension with four-point floating, good buffering and shock absorbing effect, simple structure and low manufacturing cost.

[0005] The technical solution is: a driving suspension of a medium-sized vehicle includes two parts: a front suspension assembly and a rear suspension assembly. The rear suspension assembly includes a left rear suspension assembly and a right rear suspension assembly, and left and right rear suspension upper brackets. The front suspension assembly includes left and right front suspension upper bracket assemblies, left and right tilt arms, stabilizer bars, shock absorbers, shock absorber lower brackets, and limit blocks.

[0006] The front ends of the left and right flip arms are connected by a stabilizer bar. The upper ends of the front parts of the left and right flip arms are provided with shoulders, which are hinged to the left and right front suspension upper brackets at the shoulders. The front suspension shock absorbers arranged vertically are connected to the rear of the shoulders and the outer sides of the flip arms at the front of the left and right flip arms, and the other ends of the front suspension shock absorbers are hinged to the shock absorber lower brackets. The front suspension upper brackets include a front plate, a grooved bottom plate, a flip shaft, a limit shaft, and a composite flip bushing. The grooved bottom plates and front plates of the left and right front suspension upper brackets are connected to the cab assembly. The grooved bottom plate is fixedly connected to the longitudinal beam of the bottom plate of the cab assembly with six bolts, and the front plate is connected to the front driving plate with three bolts. The limit block is below the stabilizer bar.

[0007] The rear suspension assembly includes left and right rear suspension upper bracket assemblies and left and right rear suspension lower bracket assemblies. The left and right rear suspension lower bracket assemblies are composed of a lock body assembly, a rear suspension spring shock absorber, a comfort bushing, and a rear suspension lower bracket. The comfort bushing is installed in the upper end hole of the rear suspension lower bracket, one end of the lock body assembly is hinged to the upper end of the rear suspension lower bracket, and the hinge shaft passes through the comfort bushing, the lower end of the other side of the lock body is hinged to the rear suspension spring shock absorber, and the other end of the spring shock absorber is hinged to the rear suspension lower bracket.

[0008] In the above-mentioned cab full-floating suspension technical solution, in a more specific solution, the flipping of the left and right front suspension upper brackets is supported by composite bushings, and the composite bushings have a self-lubricating function. After the flip shaft passes through the bushing and is pressed with the limit plate, it can play a maintenance-free flipping function.

[0009] In a specific solution, the front suspension shock absorber is arranged below the stabilizer bar.

[0010] In the specific installation, the rear suspension assembly adopts a split layout, and the left and right rear suspension lower bracket assemblies are not horizontally connected on both sides. The lock body is hinged to the rear suspension spring shock absorber and the rear suspension lower bracket at the same time.

[0011] Furthermore, the rear suspension spring shock absorber and the rear suspension lower bracket form an acute angle less than 45°, and the rear suspension lower bracket and the lock body are hinged with a comfortable bushing transition.

[0012] Furthermore, the damping coefficient of the front suspension spring shock absorber is between 0.45-1.05, and the damping force is between 200N-3500N; the damping coefficient of the rear suspension spring shock absorber is between 0.3-0.7, and the damping force is between 100N-800N.

[0013] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0014] 1. The front and rear suspensions of the patented invention both adopt components such as shock absorbers that can greatly absorb impacts and attenuate vibrations, thereby improving the cab suspension of medium-sized commercial vehicles from the original semi-floating suspension to a four-point full-floating suspension, which has a good vibration isolation effect, improves the vibration isolation rate of the cab of the medium-sized commercial vehicle, and improves driving comfort.

[0015] 2. The shock absorber is located below the stabilizer bar and perpendicular to the front suspension upper bracket, which allows the stabilizer bar to float with the cab, effectively improving the driving rigidity and roll stability; at the same time, it plays an auxiliary supporting role for the front suspension upper bracket. This structural design has good coupling, improves comfort, improves the smoothness of the cab, and helps save space.

[0016] 3. The left and right rear suspension assemblies exist independently, and the rear suspension lower bracket is optimized through topology to make it have higher strength and reduce its own weight.

[0017] 4. Through the optimization of the lock body structure, the rear suspension bracket, spring shock absorber and lock body form a stable triangle structure. At the same time, the use of comfortable bushings ensures that the cab has both stability and comfort.

[0018] 5. The use of composite bushings and interference fit in the flipping of the left and right front suspension upper brackets can make the flipping system maintenance-free. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the mechanism of the cab suspension device.

[0020] Figure 2 It is a schematic diagram of the front suspension assembly structure.

[0021] Figure 3 It is a schematic diagram of the rear suspension upper bracket assembly structure.

[0022] Figure 4 It is a schematic diagram of the structure of the rear suspension lower bracket assembly.

[0023] Including: 1-front suspension assembly, 2-right rear suspension upper bracket 2, 3-right rear lower bracket, 4-left rear suspension upper bracket, 5-left rear suspension lower bracket, 6-right front suspension upper bracket assembly, 7-right flip arm, 8-front suspension spring shock absorber, 9-front suspension lower bracket, 10-lateral stabilizer bar, 11-limiting block, 12-left flip arm, 13-left front suspension upper bracket assembly, 14-front suspension groove bottom plate, 15-front panel, 16-limiting shaft, 17-bushing, 18-flip shaft, 19-lock body, 20-rear suspension spring shock absorber, 21-rear suspension lower bracket, 22-comfort bushing. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figure 1 The cab full floating device shown mainly includes a set of front suspension assembly parts 1, a set of left and right rear suspension upper bracket assembly parts 2 and 4, and a set of left and right rear suspension lower bracket assembly parts 3 and 5. In the front suspension assembly parts 1, the front suspension groove-type bottom plate part 14 is connected to the longitudinal beam of the vehicle body, and the front panel part 15 is connected to the front plate of the vehicle body. The right rear suspension assembly part 3 and the left rear suspension assembly part 5 are respectively located on both sides of the frame, and the right rear suspension upper bracket part 2 and the left rear suspension upper bracket part 4 are located on the left and right sides of the vehicle body and connected to the vehicle body. After the cab falls, the rear suspension upper bracket assembly and the rear suspension lower bracket assembly are combined. In this way, a 4-point full floating is formed.

[0028] like Figure 2 The front suspension assembly shown includes: right front suspension upper bracket assembly 6, flip arm 7, front suspension spring shock absorber 8, front suspension lower bracket 9, lateral stabilizer bar 10, limit block 11, left flip arm 12, left front suspension upper bracket assembly 13. The left front suspension upper bracket assembly 13 and the right front suspension upper bracket assembly 6 are symmetrical parts with the same structure; the left front suspension flip arm 12 and the right front suspension flip arm 7 are symmetrical parts.

[0029] The left and right front suspension flip arms 12 and 7 are fixed to the left and right sides of the lateral stabilizer bar 10, respectively, and the other ends of the left and right front suspension flip arms 12 and 7 are connected to the vehicle frame through the first hinge point. The upper part of the left and right front suspension flip arms 12 and 7 is provided with a shoulder, which is hinged to the left and right front suspension upper brackets 13 and 6 respectively. The front outer side of the left and right front suspension flip arms 12 and 7 is connected to the front suspension shock absorber 8 through the second hinge, and the front suspension shock absorber 8 is connected to the front suspension lower bracket 9 through the third hinge point. More preferably, the second hinge axis and the third hinge axis are perpendicular to each other, so that better buffering can be achieved through the spring shock absorber 8.

[0030] refer to Figure 3 In the left and right front suspension upper bracket parts 13 and 6, the pressing fit of the limit shaft 16 and the flip shaft 18 needs to pass through the composite bushing 17, and there is no gap between the limit shaft 16 and the flip shaft 18 to achieve a maintenance-free function.

[0031] refer to Figure 4 The left and right rear suspension bracket assemblies 5 and 3 are symmetrical parts. A single rear suspension bracket assembly includes a lock body 19, a rear suspension shock absorber 20, a rear suspension bracket 21, and a comfort bushing 22. The comfort bushing 22 is installed in the upper hole of the rear suspension bracket 5. One end of the lock body 19 is hinged to the upper end of the rear suspension bracket 21 at the fourth hinge axis. The hinge axis preferably passes through the comfort bushing 22. The lower end of the other side of the lock body is hinged to the rear suspension spring shock absorber 19 at the hinge axis 5. The other end of the spring shock absorber 8 is hinged to the hinge axis 6 of the rear suspension bracket 21. The angle between the rear suspension spring shock absorber 20 and the rear suspension bracket 21 is preferably less than 45°.

[0032] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A medium truck cab suspension, comprising a front suspension assembly and a rear suspension assembly, characterized in that: The rear suspension assembly includes left and right rear suspension upper bracket assemblies, and left and right rear suspension lower bracket assemblies; the front suspension assembly includes left and right front suspension upper bracket assemblies, left and right tilt arms, stabilizer bars, shock absorbers, shock absorber lower brackets, and limit blocks; The front ends of the left and right flip arms are connected by a stabilizer bar, the upper ends of the front parts of the left and right flip arms are provided with shoulders, which are hinged to the left and right front suspension upper bracket assemblies at the shoulders, and the other ends of the left and right flip arms are respectively connected to the frame through a first hinge point; at the front part of the left and right flip arms, behind the shoulders, the outer sides of the left and right flip arms are connected to vertically arranged shock absorbers, and the other ends of the shock absorbers are hinged to the shock absorber lower bracket, the outer sides of the front parts of the left and right flip arms are connected to the shock absorbers through a second hinge point, and the shock absorbers are connected to the front suspension lower bracket through a third hinge point, and the hinge axis of the second hinge point and the hinge axis of the third hinge point are perpendicular to each other; The left and right front suspension upper bracket assemblies include a front plate, a grooved bottom plate, a tilt shaft, a limit shaft, and a composite bushing. The grooved bottom plate and the front plate of the left and right front suspension upper bracket assemblies are connected to the cab assembly, the grooved bottom plate is fixedly connected to the longitudinal beam of the vehicle body, the front plate is fixedly connected to the front plate of the vehicle body, the limit block is arranged below the stabilizer bar, and the shock absorber is arranged below the stabilizer bar; The left and right rear suspension lower bracket assemblies are composed of a lock body assembly, a rear suspension spring shock absorber, a comfort bushing, and a rear suspension lower bracket; the comfort bushing is installed in the upper end hole of the rear suspension lower bracket, one end of the lock body assembly is hinged to the upper end of the rear suspension lower bracket, and the hinge shaft passes through the comfort bushing, the lower end of the other side of the lock body assembly is hinged to the rear suspension spring shock absorber, and the other end of the rear suspension spring shock absorber is hinged to the rear suspension lower bracket; The flipping of the left and right front suspension upper bracket assemblies is supported by composite bushings, and the composite bushings have a self-lubricating function. The flipping shaft passes through the composite bushings and is pressed into the limit plate.

2. A medium truck cab suspension according to claim 1, characterized in that: The rear suspension assembly adopts a split layout, and the left and right rear suspension lower bracket assemblies have no transverse connection on both sides respectively, and the lock body assembly is hinged with the rear suspension spring shock absorber and the rear suspension lower bracket at the same time.

3. The medium truck cab suspension according to claim 1, characterized in that: The rear suspension spring shock absorber and the rear suspension lower bracket form an acute angle less than 45°, and the rear suspension lower bracket and the lock body assembly are hinged and require a comfortable bushing transition.

4. The medium truck cab suspension according to claim 1 is characterized in that: The damping coefficient of the shock absorber of the front suspension assembly is between 0.45-1.05, and the damping force is between 200N-3500N. The damping coefficient of the rear suspension spring shock absorber is between 0.3-0.7, and the damping force is between 100N-800N.

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