阅读说明：本技术 车辆悬架 (Vehicle suspension ) 是由 张军伟 张斌 李辰 李洪彪 吴学雷 万芳 左霞 于斌 于 2021-10-20 设计创作，主要内容包括：本发明提供了一种车辆悬架,涉及机械设备技术领域,具体包括减振装置、阻尼装置,所述减振装置设置于所述阻尼装置轴心处,还包括导向机构及限位装置,所述导向机构包括上横臂、下横臂,所述上横臂连接于所述阻尼装置上,所述下横臂连接于所述减振装置上,所述上横臂与所述阻尼装置相固定,所述下横臂两端适于相对所述减振装置偏摆,所述上横臂、所述下横臂的里侧均设置有销轴,所述销轴用于连接车架,所述上横臂、所述下横臂的外侧均设置有球铰,所述球铰用于连接轮组,所述限位装置包括上限位块、下限位块.本发明能够实现车轮的上下跳动,增大轮跳行程,使车辆更好的适应越野环境。(The invention provides a vehicle suspension, which relates to the technical field of mechanical equipment, and particularly comprises a vibration damper and a damping device, wherein the vibration damper is arranged at the axle center of the damping device, and further comprises a guide mechanism and a limiting device, the guide mechanism comprises an upper cross arm and a lower cross arm, the upper cross arm is connected to the damping device, the lower cross arm is connected to the vibration damper, the upper cross arm is fixed with the damping device, two ends of the lower cross arm are suitable for deflecting relative to the vibration damper, pin shafts are arranged on the inner sides of the upper cross arm and the lower cross arm and used for connecting a vehicle frame, ball hinges are arranged on the outer sides of the upper cross arm and the lower cross arm and used for connecting a wheel set, and the limiting device comprises an upper limiting block and a lower limiting block, the vehicle is better adapted to the off-road environment.)

1. A vehicle suspension comprising a vibration damping device (01), a damping device (02), said vibration damping device (01) being arranged at the axis of said damping device (02), characterized in that,

the wheel suspension mechanism further comprises a guide mechanism (03) and a limiting device, the guide mechanism (03) comprises an upper cross arm (31) and a lower cross arm (32), the upper cross arm (31) is connected to the damping device (02), the lower cross arm (32) is connected to the damping 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), two ends of the lower cross arm (32) are suitable for deflecting relative to the damping device (01), pin shafts (311, 321) are respectively arranged on the inner sides of the upper cross arm (31) and the lower cross arm (32), the two pin shafts (311, 321) are used for connecting a vehicle frame, ball hinges (312, 322) are respectively arranged on the outer sides of the upper cross arm (31) and the lower cross arm (32), and the two ball hinges (312, 322) are used for connecting a wheel set,

the limiting device comprises an upper limiting block (51) and a lower limiting block (52), the upper limiting block (51) is connected to the damping device (02), the lower limiting block (52) is connected to the vibration damping device (01), the upper limiting block (51) is located above the upper cross arm (31), and the lower limiting block (52) is located below the upper cross arm (31).

2. The vehicle suspension of claim 1,

the upper end of the vibration damper (01) is fixedly connected with a frame, the lower end of the vibration damper (01) is provided with a joint bearing, and the middle part of the lower cross arm (32) is connected to the joint bearing through a pin shaft.

3. The vehicle suspension of claim 2,

the length of the upper cross arm (31) is greater than or equal to 430mm, and the length of the lower cross arm (32) is greater than or equal to 600 mm.

4. The vehicle suspension of claim 3,

the height of the inner side point of the lower cross arm (32) is higher than that of the outer side point, and the height of the inner side point of the upper cross arm (31) is lower than that of the outer side point.

5. The vehicle suspension of claim 4,

the ratio of the distance from the connection point of the lower cross arm (32) and the vibration damper (01) to the pin shaft (321) of the lower cross arm to the length of the lower cross arm (32) is 0.6-0.7.

6. The vehicle suspension of claim 5,

the upper limiting block (51) and the lower limiting block (52) are identical in structure, wherein the upper limiting block (51) comprises a limiting block framework (511), a buffering block (512) and an installation block (513), the limiting block framework (511) is an annular body with one closed end, the installation block (513) is connected to the closed end of the limiting block framework (511), the buffering block (512) is clamped between the limiting block framework (511) and the installation block (513), an accommodating groove is formed in one end of the buffering block (512), the installation block (513) is accommodated in the accommodating groove, the other end of the buffering block (512) protrudes out of the annular body of the limiting block framework (511), the buffering block (512) is made of an elastic material, and the limiting block framework (511) and the installation block (513) are made of a rigid material.

7. The vehicle suspension of claim 6,

the mounting block (513) is provided with a threaded hole (514).

8. The vehicle suspension of claim 7,

the upper end and the lower end of the vibration damping device (01) and the upper end and the lower end of the damping device (02) are respectively connected through a support (41) and a support (42).

9. The vehicle suspension of claim 8,

the support (41) positioned at the upper ends of the vibration damper (01) and the damping device (02) is connected with the frame through bolts.

10. The vehicle suspension of claim 9,

the inner side end part of the upper cross arm (31) is provided with a first shaft hole, a first double bearing is arranged in the first shaft hole, the pin shaft (311) of the upper cross arm (31) is arranged in the first double bearing, the inner side end part of the lower cross arm (32) is provided with a second shaft hole, a second double bearing is arranged in the second shaft hole, and the pin shaft (321) of the lower cross arm (32) is arranged in the second double bearing.

Technical Field

The invention relates to a mechanical device, in particular to a vehicle suspension.

Background

The existing chassis of the ultra-heavy vehicle has the defects of weak off-road capability and poor passing capability due to limited structure, and can not meet the requirements of various complex and severe working conditions. One of the key parts affecting the off-road capability of the vehicle chassis is a suspension system, and whether the structure of the suspension system reasonably and directly affects the performance of the chassis is good or bad. Therefore, it is highly desirable to design a large load capacity, large runout vehicle suspension to meet the off-road needs of the vehicle.

Disclosure of Invention

The invention solves the problem of providing a vehicle suspension which has larger wheel jump stroke and can ensure that the vehicle has stronger cross-country capability.

In order to solve the above problems, the present invention provides a vehicle suspension, which comprises a vibration damping device, a guiding mechanism and a limiting device, wherein the vibration damping device is arranged at the axis of the damping device, the guiding mechanism comprises an upper cross arm and a lower cross arm, the upper cross arm is connected to the damping device, the lower cross arm is connected to the vibration damping device, the upper cross arm is positioned above the lower cross arm, the upper cross arm is fixed with the damping device, two ends of the lower cross arm are suitable for deflecting relative to the vibration damping device, pin shafts are arranged at the inner sides of the upper cross arm and the lower cross arm, the pin shafts are used for connecting a vehicle frame, ball hinges are arranged at the outer sides of the upper cross arm and the lower cross arm and are used for connecting a wheel set, the limiting device comprises an upper limiting block and a lower limiting block, the upper limiting block is connected to the damping device, the lower limiting block is connected to the vibration damper, the upper limiting block is located above the upper cross arm, and the lower limiting block is located below the upper cross arm.

Furthermore, the upper end of the vibration damper is fixedly connected with the frame, the lower end of the vibration damper 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.

Further, the length of the upper cross arm is larger than or equal to 430mm, and the length of the lower cross arm is larger than or equal to 600 mm.

Further, the height of the inner side point of the lower cross arm is higher than that of the outer side point, and the height of the inner side point of the upper cross arm is lower than that of the outer side point.

Further, the ratio of the distance from the connecting point of the lower cross arm and the vibration damper to the pin shaft of the lower cross arm to the length of the lower cross arm is 0.6-0.7.

Furthermore, the upper limiting block and the lower limiting block have the same structure, wherein the upper limiting block comprises a limiting block framework, a buffer block and an installation block, the limiting block framework is an annular body with one closed end, the installation block is connected to the closed end of the limiting block framework, the buffer block is clamped between the limiting block framework and the installation block, an accommodating groove is formed in one end of the buffer block, the installation block is accommodated in the accommodating groove, the other end of the buffer block protrudes out of the annular body of the limiting block framework, the buffer block is made of elastic materials, and the limiting block framework and the installation block are made of rigid materials.

Furthermore, a threaded hole is formed in the mounting block.

Furthermore, the vibration damping device is connected with the upper end and the lower end of the damping device through a support respectively.

Further, the support at the upper ends of the vibration damping device and the damping device is connected with the frame through bolts.

Furthermore, a first shaft hole is formed in the inner side end portion of the upper cross arm, a first double bearing is arranged in the first shaft hole, the pin shaft of the upper cross arm is arranged in the first double bearing, a second shaft hole is formed in the inner side end portion of the lower cross arm, a second double bearing is arranged in the second shaft hole, and the pin shaft of the lower cross arm is arranged in the second double bearing.

The upper cross arm of the vehicle suspension is connected to the damping device, the lower cross arm is connected to the vibration damping device, the inner sides of the upper cross arm and the lower cross arm are respectively connected with the vehicle frame through the pin shaft of the upper cross arm and the pin shaft of the lower cross arm, so that the vehicle frame can swing up and down around the pin shaft in the X-axis direction, the outer sides of the upper cross arm and the lower cross arm are connected with the wheel set through the spherical hinge, the wheels can jump up and down around the X-axis and move in a rotating manner around the Z-axis, the up-and-down large-stroke jumping of the wheels is realized, the ultra-heavy vehicle can better adapt to cross-country environments, and the requirements of complex and severe road conditions are met.

Drawings

FIG. 1 is a front view of a vehicle suspension according to an embodiment of the present invention;

FIG. 2 is a rear view of a vehicle suspension according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of an upper limiting block in a vehicle suspension according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a ball joint in a vehicle suspension according to an embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

The terms "upper", "lower", "front", "rear", "left" and "right" and the like appearing in the embodiments of the present invention indicate directions or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device referred to must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium; the specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

If there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

The invention relates to a vehicle suspension, as shown in fig. 1 and fig. 2, which comprises a vibration damper 01, a damper 02, a guide mechanism 03 and a limiting device, wherein the vibration damper 01 is arranged at the axle center of the damper 02, the upper end of the vibration damper 01 is used for being fixedly connected with a vehicle frame through a bolt, the guide mechanism 03 comprises an upper cross arm 31 and a lower cross arm 32, the upper cross arm 31 is connected with the damper 02, the lower cross arm 32 is connected with the vibration damper 01, the upper cross arm 31 is positioned above the lower cross arm 32, the upper cross arm 31 is fixed with the damper 02, two ends of the lower cross arm 32 are suitable for deviating a certain angle relative to the vibration damper 01, pin shafts 311 and 321 are respectively arranged on the inner sides of the upper cross arm 31 and the lower cross arm 32, the pin shafts 311 and 321 are used for connecting the vehicle frame, spherical hinges 312 and 322 are respectively arranged on the outer sides of the upper cross arm 31 and the lower cross arm 32, the spherical hinges 312 and 322 are used for connecting the wheel groups, and the limiting device comprises an upper limiting block 51, The lower limiting block 52, the upper limiting block 51 are connected to the damping device 02, the lower limiting block 52 is connected to the vibration damping device 01, the upper limiting block 51 is positioned above the upper cross arm 31, and the lower limiting block 52 is positioned below the upper cross arm 31. The forward direction of the vehicle coordinate system is the positive direction of an X axis, the upward direction is the positive direction of a Z axis, and the leftward direction is determined to be the positive direction of a Y axis according to a right-hand rule. Because the upper cross arm 31 is connected to the damping device 02, the lower cross arm 32 is connected to the vibration damping device 01, the inner sides of the upper cross arm 31 and the lower cross arm 32 are respectively connected with the frame through the pin shaft 311 of the upper cross arm and the pin shaft 321 of the lower cross arm, the frame can swing up and down around the pin shaft, namely in the X-axis direction, the outer sides of the upper cross arm 31 and the lower cross arm 32 are connected with the wheel sets through the spherical hinges 312 and 322, the wheels can jump up and down around the X-axis and move in a steering manner around the Z-axis, the up-down large-stroke jumping of the wheels is realized, the ultra-heavy vehicle can better adapt to off-road environments, and the requirements of complex and severe road conditions are met.

Specifically, the upper limiting block 51 and the lower limiting block 52 have the same structure, as shown in fig. 3, the upper limiting block 51 includes a limiting block frame 511, a buffer block 512, and an installation block 513, the limiting block frame 511 is an annular body with one end closed, the installation block 513 is connected to the closed end of the limiting block frame 511, the buffer block 512 is clamped between the limiting block frame 511 and the installation block 513, one end of the buffer block 512 is provided with an accommodating groove, the installation block 513 is accommodated in the accommodating groove, the other end of the buffer block 512 protrudes out of the annular body of the limiting block frame 511, a portion of the buffer block 512 protruding out of the annular body of the limiting block frame 511 is used for contacting with a wheel jumping up to a limit position, the buffer block 512 is made of an elastic material, the limiting block frame 511 and the installation block 513 are both made of a rigid material, and the installation block 513 is used for installing the upper limiting block 51 on the damping device 02; specifically, a threaded hole 514 is formed in the mounting block 513, the upper limiting block 51 is mounted on the damping device 02 by a bolt arranged in the threaded hole 514, the limiting block framework 511 and the mounting block 513 are made of metal materials or other rigid materials, and the buffer block 512 is made of rubber or other elastic materials. The lower stop block 52 is mounted to the upper crossbar 31 in the same manner. The upper limiting block 51 is used for limiting the limit position of wheel jumping, the lower limiting block 52 is used for limiting the limit position of wheel jumping, and the buffer block 512 on the upper limiting block 51 is arranged to reduce the impact force with the upper limiting block 51 in the process of wheel jumping.

Optionally, the damping device 02 is a helical spring. The elastic damping device is formed by the spiral spring and the shock absorber, so that the vehicle suspension has the advantages of high reliability, no maintenance, high integration level, small occupied space, contribution to overall arrangement of the chassis and the like.

Optionally, the upper end of the vibration damping device 01 is fixedly connected with the frame through a bolt, 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 through a pin shaft. Because the upper end of the vibration damper 01 is fixed, the lower end is provided with a joint bearing, and the lower cross arm 32 is connected to the joint bearing through a pin shaft, the lower cross arm 32 is suitable for deflection at a certain angle, and the non-axial force of the spiral spring is counteracted.

Optionally, the length of the upper cross arm 31 is greater than or equal to 430mm, the length of the lower cross arm 32 is greater than or equal to 600mm, the above arrangement ensures that the sum of the spherical hinge bilateral angles of the spherical hinge 312 and the spherical hinge 322 when the wheel is at the upper and lower jumping limit positions during the vehicle motion is less than 40 °, as shown in fig. 4, the spherical hinge bilateral angle refers to the relative swing angle a of the ball stud and the ball socket in the spherical hinge 312 and the spherical hinge 322.

Alternatively, the inner point of the lower cross arm 32 refers to the center of the pin 321 of the lower cross arm 32, the outer point of the lower cross arm 32 refers to the ball head center of the ball joint 322 of the lower cross arm 32, and the inner point of the lower cross arm 32 is higher than the outer point.

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

In the running process of the vehicle, when the wheels jump within the range of +/-100 mm from top to bottom, the change of the unilateral track is less than 20mm, the change of the inner inclination angle of the kingpin is less than 2 degrees, the change of the camber angle of the wheels is less than 2 degrees, and the operation stability of the heavy vehicle is improved.

Optionally, the ratio of the distance from the connecting point of the lower cross arm 32 and the vibration damping device 01 to the pin 321 of the lower cross arm 32 to the length of the lower cross arm 32 is 0.6-0.7. The travel and the load of the spiral spring in the full travel range of the vertical jump of the wheel are ensured to be in a reasonable range, and the dynamic load coefficient is not less than 6.

Alternatively, the upper end of the vibration damping device 01 is connected with the upper end of the damping device 02 through a support 41, and the lower end of the vibration damping device 01 is connected with the lower end of the damping device 02 through a support 42.

Alternatively, the support 41 at the upper end of the vibration damping device 01 and the damping device 02 is used for connecting with the frame through bolts.

Optionally, a first shaft hole is formed at an inner end of the upper cross arm 31, a first double bearing is disposed in the first shaft hole, the pin shaft 311 of the upper cross arm 31 is disposed in the first double bearing, a second shaft hole is formed at an inner end of the lower cross arm 32, a second double bearing is disposed in the second shaft hole, and the pin shaft 321 of the lower cross arm 32 is disposed in the second double bearing. Lubricating oil channels are designed on the pin shaft 311 of the upper cross arm 31 and the pin shaft 321 of the lower cross arm 32, so that the pin shaft is guaranteed to have enough lubrication when rotating relative to double bearings, and abrasion is prevented.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.