Vehicle Suspension

Abstract

The present invention provides a vehicle suspension, which relates to the technical field of mechanical equipment, and specifically includes a vibration reduction device and a damping device. The vibration reduction device is arranged at the axis of the damping device, and also includes a guiding mechanism and a limiting device. The guiding mechanism includes an upper cross arm and a lower cross arm. The upper cross arm is connected to the damping device, and the lower cross arm is connected to the vibration reduction device. The upper cross arm is fixed to the damping device, and the two ends of the lower cross arm are suitable for swinging relative to the vibration reduction device. The inner sides of the upper cross arm and the lower cross arm are provided with pins, and the pins are used to connect to a vehicle frame. The outer sides of the upper cross arm and the lower cross arm are provided with ball joints, and the ball joints are used to connect to a wheel set. The limiting device includes an upper limit block and a lower limit block. The present invention can realize the up and down bounce of the wheel, increase the wheel jump stroke, and enable the vehicle to better adapt to the off-road environment.

Description

Technical Field

[0001] The invention relates to a mechanical device, in particular to a vehicle suspension. Background Art

[0002] The existing ultra-heavy vehicle chassis, due to structural limitations, has the disadvantages of weak off-road capability and poor passing ability, and cannot meet the needs of various complex and harsh working conditions. One of the key parts that affects the off-road capability of the vehicle chassis is the suspension system. Whether the suspension system structure is reasonable directly affects the performance of the chassis. Therefore, it is urgent to design a vehicle suspension with large load-bearing capacity and large travel to meet the needs of vehicle off-road. Summary of the invention

[0003] The problem solved by the present invention is to provide a vehicle suspension with a larger wheel jump travel and capable of making the vehicle have a stronger off-road capability.

[0004] To solve the above problems, the present invention provides a vehicle suspension, including a vibration reduction device and a damping device, wherein the vibration reduction device is arranged at the axis of the damping device, and also includes a guiding mechanism and a limiting device, wherein the guiding mechanism includes an upper cross arm and a lower cross arm, wherein the upper cross arm is connected to the damping device, and the lower cross arm is connected to the vibration reduction device, wherein the upper cross arm is located above the lower cross arm, and the upper cross arm is fixed to the damping device, and the two ends of the lower cross arm are suitable for swinging relative to the vibration reduction device, and the inner sides of the upper cross arm and the lower cross arm are both provided with pins, and the pins are used to connect to a vehicle frame, and the outer sides of the upper cross arm and the lower cross arm are both provided with ball joints, and the ball joints are used to connect to a wheel set, and the limiting device includes an upper limit block and a lower limit block, wherein the upper limit block is connected to the damping device, and the lower limit block is connected to the vibration reduction device, wherein the upper limit block is located above the upper cross arm, and the lower limit block is located below the upper cross arm.

[0005] Furthermore, the upper end of the vibration damping device is used for fixed connection with the vehicle frame, the lower end of the vibration damping device is provided with a joint bearing, and the middle part of the lower cross arm is connected to the joint bearing through a pin shaft.

[0006] Furthermore, the length of the upper cross arm is greater than or equal to 430 mm, and the length of the lower cross arm is greater than or equal to 600 mm.

[0007] Furthermore, the height of the inner point of the lower cross arm is higher than the height of the outer point, and the height of the inner point of the upper cross arm is lower than the height of the outer point.

[0008] Furthermore, the ratio of the distance from the connection point between the lower cross arm and the vibration reduction device to the pin of the lower cross arm to the length of the lower cross arm is 0.6-0.7.

[0009] Furthermore, the upper limit block and the lower limit block have the same structure, wherein the upper limit block includes a limit block frame, a buffer block, and a mounting block, the limit block frame is an annular body with one end closed, the mounting block is connected to the closed end of the limit block frame, the buffer block is clamped between the limit block frame and the mounting block, and a receiving groove is provided at one end of the buffer block, the mounting block is accommodated in the receiving groove, and the other end of the buffer block protrudes out of the annular body of the limit block frame, the buffer block is made of elastic material, and the limit block frame and the mounting block are both made of rigid material.

[0010] Furthermore, a threaded hole is provided on the mounting block.

[0011] Furthermore, the vibration reduction device is connected to the damping device at upper and lower ends via a support respectively.

[0012] Furthermore, the support located at the upper end of the vibration reduction device and the damping device is used to be connected to the frame through bolts.

[0013] Furthermore, a first axial hole is opened at the inner end of the upper cross arm, a first double bearing is arranged in the first axial hole, the pin shaft of the upper cross arm is arranged in the first double bearing, a second axial hole is opened at the inner end of the lower cross arm, a second double bearing is arranged in the second axial hole, and the pin shaft of the lower cross arm is arranged in the second double bearing.

[0014] Since the upper cross arm of the vehicle suspension of the present invention is connected to the damping device, and the lower cross arm is connected to the vibration reduction device, the inner sides of the upper cross arm and the lower cross arm are respectively connected to the frame through the pin shaft of the upper cross arm and the pin shaft of the lower cross arm, so that the frame can swing up and down around the pin shaft, that is, in the X-axis direction, and the outer sides of the upper cross arm and the lower cross arm are connected to the wheel set through the ball joint, so that the wheel can jump up and down around the X-axis and turn around the Z-axis, so as to realize the large up and down stroke jumping of the wheel, so that the super-heavy vehicle can better adapt to the off-road environment and meet the needs of complex and severe road conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of a vehicle suspension according to an embodiment of the present invention;

[0016] Figure 2 A rear view of a vehicle suspension according to an embodiment of the present invention;

[0017] Figure 3 A cross-sectional view of an upper limit block in a vehicle suspension according to an embodiment of the present invention;

[0018] Figure 4 The present invention is a schematic diagram of the structure of a ball joint in a vehicle suspension according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0020] The directions or positional relationships indicated by the terms "up", "down", "front", "back", "left" and "right" etc. appearing in the embodiments of the present invention are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "set", "installed", "connected" and "connected" 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; it can be directly connected or indirectly connected through an intermediate medium; for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] If there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0023] A vehicle suspension according to an embodiment of the present invention, such as Figure 1 , Figure 2As shown, it includes a vibration reduction device 01, a damping device 02, a guide mechanism 03 and a limit device. The vibration reduction device 01 is arranged at the axis of the damping device 02. The upper end of the vibration reduction device 01 is used to be fixedly connected to the frame by bolts. The guide mechanism 03 includes an upper cross arm 31 and a lower cross arm 32. The upper cross arm 31 is connected to the damping device 02, and the lower cross arm 32 is connected to the vibration reduction device 01. The upper cross arm 31 is located above the lower cross arm 32. The upper cross arm 31 is fixed to the damping device 02, and the two ends of the lower cross arm 32 are suitable for swinging at a certain angle relative to the vibration reduction device 01. , the inner side of the upper cross arm 31 and the lower cross arm 32 are respectively provided with pins 311 and 321, and the pins 311 and 321 are used to connect the frame, and the outer side of the upper cross arm 31 and the lower cross arm 32 are respectively provided with ball joints 312 and 322, and the ball joints 312 and 322 are used to connect the wheel set, and the limit device includes an upper limit block 51 and a lower limit block 52, the upper limit block 51 is connected to the damping device 02, and the lower limit block 52 is connected to the vibration reduction device 01, the upper limit block 51 is located above the upper cross arm 31, and the lower limit block 52 is located below the upper cross arm 31. The vehicle coordinate system is forward as the positive direction of the X axis, upward as the positive direction of the Z axis, and according to the right-hand rule, the left is determined to be the positive direction of the Y axis. Since the upper cross arm 31 is connected to the damping device 02, and the lower cross arm 32 is connected to the shock absorbing device 01, the inner sides of the upper cross arm 31 and the lower cross arm 32 are connected to the frame through the pin shaft 311 of the upper cross arm and the pin shaft 321 of the lower cross arm respectively, so that the frame can swing up and down around the pin shaft, that is, in the X-axis direction, and the outer sides of the upper cross arm 31 and the lower cross arm 32 are connected to the wheel set through the ball joints 312 and 322, so that the wheel can jump up and down around the X-axis and turn around the Z-axis, realizing a large up and down stroke of the wheel, so that the super-heavy vehicle can better adapt to the off-road environment and meet the needs of complex and harsh road conditions.

[0024] Specifically, the upper limit block 51 and the lower limit block 52 have the same structure. Figure 3As shown, the upper limit block 51 includes a limit block frame 511, a buffer block 512, and a mounting block 513. The limit block frame 511 is an annular body with one end closed, and the mounting block 513 is connected to the closed end of the limit block frame 511. The buffer block 512 is clamped between the limit block frame 511 and the mounting block 513, and a receiving groove is opened at one end of the buffer block 512, and the mounting block 513 is accommodated in the receiving groove. The other end of the buffer block 512 protrudes from the annular body of the limit block frame 511, and the end of the buffer block 512 protrudes from the annular body of the limit block frame 511. The upper part is used to contact the wheel that jumps up to the limit position. The buffer block 512 is made of elastic material. The limit block frame 511 and the mounting block 513 are made of rigid material. The mounting block 513 is used to install the upper limit block 51 on the damping device 02. Specifically, a threaded hole 514 is provided on the mounting block 513. The bolts arranged in the threaded hole 514 install the upper limit block 51 on the damping device 02. The limit block frame 511 and the mounting block 513 are made of metal material or other rigid materials. The buffer block 512 is made of rubber or other elastic materials. The lower limit block 52 is installed on the upper cross arm 31 in the same way. The upper limit block 51 is used to limit the limit position of the wheel jumping up, and the lower limit block 52 is used to limit the limit position of the wheel jumping down. The setting of the buffer block 512 on the upper limit block 51 reduces the impact force with the upper limit block 51 during the wheel jumping process.

[0025] Optionally, the damping device 02 is a coil spring. The coil spring and the shock absorber are used to form an elastic damping device, so that the vehicle suspension of the present invention has the advantages of high reliability, maintenance-free, high integration, small space occupation, and is conducive to the overall layout of the chassis. The vehicle suspension of the present invention, the frame, the drive system, the transmission system, and the wheel system form a modular axle, which is convenient for the wheelbase expansion of the multi-axle chassis.

[0026] Optionally, the upper end of the vibration reduction device 01 is fixedly connected to the vehicle frame by bolts, the lower end of the vibration reduction device 01 is provided with a joint bearing, and the middle part of the lower cross arm 32 is connected to the joint bearing by a pin. Since the upper end of the vibration reduction device 01 is fixed and the lower end is provided with a joint bearing, the lower cross arm 32 is connected to the joint bearing by a pin, so that the lower cross arm 32 can adapt to a certain angle of deflection to offset the non-axial force of the coil spring.

[0027] Optionally, the length of the upper cross arm 31 is greater than or equal to 430 mm, and the length of the lower cross arm 32 is greater than or equal to 600 mm. The above arrangement ensures that the sum of the bilateral angles of the ball joints 312 and 322 is less than 40° when the wheels are at the upper and lower jumping limit positions during vehicle movement. Figure 4 As shown, the bilateral angle of the ball joint refers to the relative swing angle A between the ball pin and the ball seat in the ball joint 312 and the ball joint 322.

[0028] Optionally, the inner point of the lower cross arm 32 refers to the center of the pin shaft 321 of the lower cross arm 32, and the outer point of the lower cross arm 32 refers to the center of the ball head of the ball joint 322 of the lower cross arm 32, and the height of the inner point of the lower cross arm 32 is higher than the height of the outer point.

[0029] Optionally, the inner point of the upper cross arm 31 refers to the center of the pin 311, and the outer point of the upper cross arm 31 refers to the ball head center of the ball joint 312. The inner point height of the upper cross arm 31 is lower than the outer point height. The above setting ensures that the roll center height from the ground is not less than 300mm.

[0030] During vehicle operation, when the wheel jumps within the range of ±100mm up and down, the single-side wheel track changes less than 20mm, the kingpin inclination angle changes less than 2°, and the wheel camber angle changes less than 2°, thereby improving the handling stability of heavy-duty vehicles.

[0031] Optionally, the ratio of the distance from the connection point between the lower cross arm 32 and the damping device 01 to the pin 321 of the lower cross arm 32 to the length of the lower cross arm 32 is 0.6 to 0.7. Ensure that the travel and load of the coil spring within the full range of the wheel jumping up and down are within a reasonable range, and meet the dynamic load coefficient of not less than 6.

[0032] Optionally, the upper end of the vibration reduction device 01 is connected to the upper end of the damping device 02 via a support 41 , and the lower end of the vibration reduction device 01 is connected to the lower end of the damping device 02 via a support 42 .

[0033] Optionally, the support 41 located at the upper end of the vibration reduction device 01 and the damping device 02 is used to be connected to the frame by bolts.

[0034] Optionally, a first shaft hole is formed at the inner end of the upper cross arm 31, a first double bearing is disposed in the first shaft hole, a pin shaft 311 of the upper cross arm 31 is disposed in the first double bearing, a second shaft hole is formed at the inner end of the lower cross arm 32, a second double bearing is disposed in the second shaft hole, and a pin shaft 321 of the lower cross arm 32 is disposed in the second double bearing. The pin shaft 311 of the upper cross arm 31 and the pin shaft 321 of the lower cross arm 32 are both designed with lubricating oil channels to ensure that the pin shaft has sufficient lubrication when rotating relative to the double bearing to prevent wear.

[0035] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A vehicle suspension, comprising a vibration reduction device (01) and a damping device (02), wherein the vibration reduction device (01) is arranged at the axis of the damping device (02), and characterized in that: The vehicle also comprises a guide mechanism (03) and a limit device, wherein the guide mechanism (03) comprises an upper cross arm (31) and a lower cross arm (32), wherein the upper cross arm (31) is connected to the damping device (02), and the lower cross arm (32) is connected to the vibration reduction device (01), wherein the upper cross arm (31) is located above the lower cross arm (32), wherein the upper cross arm (31) is fixed to the damping device (02), and wherein both ends of the lower cross arm (32) are suitable for swinging relative to the vibration reduction device (01), wherein the inner sides of the upper cross arm (31) and the lower cross arm (32) are respectively provided with pins (311, 321), wherein the two pins (311, 321) are used for connecting to a vehicle frame, wherein the outer sides of the upper cross arm (31) and the lower cross arm (32) are respectively provided with ball joints (312, 322), wherein the two ball joints (312, 322) are used for connecting to a wheel set, The limit device comprises an upper limit block (51) and a lower limit block (52); the upper limit block (51) is connected to the damping device (02); the lower limit block (52) is connected to the vibration reduction device (01); the upper limit block (51) is located above the upper cross arm (31); and the lower limit block (52) is located below the upper cross arm (31). The length of the upper cross arm (31) is greater than or equal to 430 mm, the length of the lower cross arm (32) is greater than or equal to 600 mm, and when the moving wheels of the vehicle are at the upper and lower jumping limit positions, the sum of the ball joint bilateral angles of the ball joint (312) of the upper cross arm (31) and the ball joint (322) of the lower cross arm (32) is less than 40°, and the ball joint bilateral angle refers to the relative swing angle A between the ball studs and the ball seat in the two ball joints.

2. The vehicle suspension according to claim 1, characterized in that The upper end of the vibration damping device (01) is used for fixed connection with the vehicle frame, the lower end of the vibration damping device (01) is provided with a joint bearing, and the middle part of the lower cross arm (32) is connected to the joint bearing via a pin shaft.

3. The vehicle suspension according to claim 2, characterized in that: The height of the inner point of the lower cross arm (32) is higher than the height of the outer point, and the height of the inner point of the upper cross arm (31) is lower than the height of the outer point.

4. The vehicle suspension according to claim 3, characterized in that The ratio of the distance between the connection point between the lower cross arm (32) and the vibration reduction device (01) and the pin shaft (321) of the lower cross arm to the length of the lower cross arm (32) is 0.6 to 0.

7.

5. The vehicle suspension according to claim 4, characterized in that The upper limit block (51) and the lower limit block (52) have the same structure, wherein the upper limit block (51) comprises a limit block frame (511), a buffer block (512), and a mounting block (513); the limit block frame (511) is an annular body with one end closed, the mounting block (513) is connected to the closed end of the limit block frame (511), the buffer block (512) is clamped between the limit block frame (511) and the mounting block (513), and a receiving groove is provided at one end of the buffer block (512), the mounting block (513) is accommodated in the receiving groove, and the other end of the buffer block (512) protrudes outside the annular body of the limit block frame (511); the buffer block (512) is made of elastic material, and the limit block frame (511) and the mounting block (513) are both made of rigid material.

6. The vehicle suspension according to claim 5, characterized in that The mounting block (513) is provided with a threaded hole (514).

7. The vehicle suspension according to claim 6, characterized in that The upper and lower ends of the vibration reduction device (01) and the damping device (02) are connected via a support seat (41, 42) respectively.

8. The vehicle suspension according to claim 7, characterized in that The support (41) located at the upper ends of the vibration reduction device (01) and the damping device (02) is used to be connected to the vehicle frame via bolts.

9. The vehicle suspension according to claim 8, characterized in that A first axial hole is formed at the inner end of the upper cross arm (31), a first double bearing is arranged in the first axial hole, the pin shaft (311) of the upper cross arm (31) is arranged in the first double bearing, a second axial hole is formed at the inner end of the lower cross arm (32), a second double bearing is arranged in the second axial hole, and the pin shaft (321) of the lower cross arm (32) is arranged in the second double bearing.

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