Integrated hydro-pneumatic spring suspension

Abstract

The utility model relates to the technical field of Mecanum wheels, and discloses an integrated hydro-pneumatic spring suspension which comprises a movable frame and a fixed frame, a motor and a speed reducer are arranged on the movable frame, an output shaft of the speed reducer is fixedly connected with a Mecanum wheel, and the fixed frame comprises a mounting top plate. A vertical supporting frame is arranged at the bottom of the mounting top plate, two stress pull rods are arranged between the two sides of the vertical supporting frame and the side wall of the movable frame in parallel, the stress pull rods are connected with the supporting frame and the movable frame through fixing pin shafts, and a hydro-pneumatic spring is further arranged between the bottom of the mounting top plate and the top of the movable frame. And the hydro-pneumatic spring is obliquely arranged. The problem of poor use caused by self-assembly and mismatching is effectively solved, the structure is stable and reliable, and the stress effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of practical Mecanum wheels, and in particular to an integrated oil-gas spring suspension. Background Art

[0002] A Mecanum wheel is a transmission wheel with many small rollers distributed on the rim, which can achieve omnidirectional movement. The special design of the small rollers allows the wheel to slide laterally, thereby achieving flexible omnidirectional movement while keeping the wheel's own direction unchanged.

[0003] Conventional Mecanum wheels are provided to customers as a single wheel, and customers assemble the wheel themselves, including the reducer, gas spring, and motor. This often results in poor compatibility between the assembled Mecanum wheel and the transmission and suspension mechanisms. Furthermore, when used to carry heavy objects, the Mecanum wheel can tilt against the ground, resulting in poor force absorption. Some even lack shock-absorbing devices, resulting in significant vibration and impact during travel. Summary of the Invention

[0004] In order to make up for the above shortcomings, the utility model provides an integrated oil-gas spring suspension, which effectively improves the poor use problems caused by self-assembly and mismatching, has a stable and reliable structure, and has a good force-bearing effect.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] An integrated oil-gas spring suspension includes a movable frame and a fixed frame, wherein a motor and a reducer are provided on the movable frame, an output shaft of the reducer is fixedly connected to a Mecanum wheel, the fixed frame includes a mounting top plate, a vertical support frame is provided at the bottom of the mounting top plate, two force-bearing pull rods are provided parallel to each other between the two sides of the vertical support frame and the side wall of the movable frame, the force-bearing pull rods are connected to the vertical support frame and the movable frame through a fixed pin shaft, and an oil-gas spring is further provided between the bottom of the mounting top plate and the top of the movable frame, and the oil-gas spring is arranged at an angle.

[0007] Furthermore, an axis connection seat is provided at the bottom of the mounting top plate, and the axis connection seat is connected to the oil and gas spring shaft. An oblong locking hole is provided on the mounting top plate corresponding to the axis connection seat and is locked by screws. A limiting bolt is provided on the vertical support frame, and the limiting bolt abuts against one side surface of the axis connection seat. The setting direction of the oblong locking hole is consistent with the axial direction of the limiting bolt.

[0008] Furthermore, a fastening nut is provided on the limiting bolt.

[0009] Furthermore, the movable frame includes a mounting vertical plate, and the mounting vertical plate is provided with mounting side plates on both sides of the reducer. The mounting side plates are connected to the force-bearing pull rod shaft, and weight-reducing holes are opened on the surface of the mounting side plates.

[0010] Furthermore, the vertical support frame includes two vertical connecting arms, and the vertical connecting arms are connected to the mounting side plates through two force-bearing pull rods.

[0011] Furthermore, positioning installation grooves are provided on the installation vertical plate and the installation top plate.

[0012] Furthermore, the gas spring includes a shock absorber, one end of the shock absorber is connected to the top shaft of the movable frame, and the other end of the shock absorber is connected to the bottom shaft of the mounting top plate. A limiting plate is provided at the end of the telescopic rod of the shock absorber, a limiting nut is provided on the body of the shock absorber, and a spring is provided on the shock absorber between the limiting plate and the limiting nut.

[0013] The utility model has the following beneficial effects:

[0014] 1. In the present invention, the movable frame and the fixed frame are connected together by four tension rods, which are combined in pairs. When the movable frame rises or falls, the tension rods can ensure that the movable frame always remains in a vertical state, that is, the Mecanum wheels always maintain a good inclination relationship with the ground, and through the cooperation of the oil and gas springs, a good shock absorption and buffering effect is achieved.

[0015] 2. In the present invention, the installation position of the gas spring can be adjusted through the adjustable shaft connection, so that the distance between the Mecanum wheel and the mounting top plate can be effectively adjusted, so that the ground clearance of the trolley after installation can be adjusted. In addition, the spring length is adjustable, so that the Mecanum wheel has the effect of adjusting the lifting speed, achieving the ability to adjust the buffering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a side structural diagram of the present utility model;

[0018] Figure 3 This is a rear view structural diagram of the utility model;

[0019] Figure 4 This is a partial structural diagram of the oil-gas spring of the utility model. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings of the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0021] Reference Figures 1-4 The utility model provides an embodiment: an integrated oil-gas spring suspension, including a movable frame 2 and a fixed frame 1, the movable frame is provided with a motor 3 and a reducer, the output shaft of the reducer is fixedly connected to the Mecanum wheel 4, the fixed frame includes a mounting top plate 5, a vertical support frame 6 is provided at the bottom of the mounting top plate, two force-bearing pull rods 7 are arranged parallel between both sides of the vertical support frame and the side wall of the movable frame, that is, two force-bearing pull rods on one side, a total of four force-bearing pull rods, the force-bearing pull rods are connected to the vertical support frame and the movable frame through a fixed pin shaft 8, the end of the fixed pin shaft can be a polygonal structure, which is convenient for wrench locking operation, and an oil-gas spring 9 is further provided between the bottom of the mounting top plate and the top of the movable frame, and the oil-gas spring is arranged at an angle to facilitate shock absorption.

[0022] When in use, customers only need to lock the mounting top plate on the fixed frame to the vehicle body. There is no problem of mismatch between the suspension and the Mecanum wheel. In addition, during use, the two force-bearing pull rods form a parallelogram structure with the movable frame and the fixed frame. The two force-bearing pull rods on both sides form a frame structure with the fixed frame and the movable frame. When the trolley carries heavy objects or the Mecanum wheel passes through obstacles such as bosses, the movable frame will be forced to move. Its upward displacement will be blocked by the oil-gas spring, which plays a shock-absorbing role through compression. At the same time as the upward displacement, the two force-bearing pull rods also move accordingly. Due to the size of the force-bearing pull rods Fixed, so according to the parallelogram deformation principle, the movable frame will also move toward the fixed frame. During this movement, due to the setting of the force-bearing rods, the movable frame and the fixed frame can always maintain a relatively parallel position relationship, that is, the movable frame always remains vertical. Conversely, when the load is reduced or after crossing an obstacle, the Mecanum wheel moves downward, that is, the movable frame resets downward, and the two force-bearing rods move into place while ensuring that the movable frame remains vertical. On this basis, it can ensure that the Mecanum wheel is always arranged perpendicular to the ground, and will not tilt due to changes in the load. The force is stable and the service life is increased.

[0023] Since the oil and gas spring plays a supporting role between the movable frame and the fixed frame, the installation position of the oil and gas spring can determine the ground clearance of the suspension, that is, the initial position of the movable frame. Therefore, an axle connection seat 10 is provided at the bottom of the installation top plate, and the axle connection seat is connected to the oil and gas spring axis. An oblong locking hole 11 is provided on the installation top plate corresponding to the axle connection seat and is locked by a screw. A limiting bolt 12 is provided on the vertical support frame, and the limiting bolt abuts against the surface of one side of the axle connection seat. The setting direction of the oblong locking hole is consistent with the axial direction of the limiting bolt. The limiting bolt is axially toward the movable frame and approaches and locks toward the movable frame through the axle connection seat. The size of the oil and gas spring is fixed, so the movable frame will be set downward, so that the Mecanum wheel is in the lower position, that is, the ground clearance is large, and when the axle connection seat approaches and is locked toward the vertical support plate, the oil and gas spring will drive the movable frame to move upward, that is, the ground clearance is small. After the shaft connection seat is fixed, it is tightened by the limiting bolt to prevent the movable frame from displacement during use. Specifically, a fastening nut 131 is provided on the limiting bolt to ensure that the limiting bolt will not loosen during use.

[0024] Since an inclined oil-gas spring needs to be set up, there is a certain gap between the movable frame and the fixed frame, and the force-bearing pull rod should not be too long. In order to ensure the stability of the force-bearing pull rod, the movable frame is designed to include a mounting vertical plate 13. The mounting vertical plate is located on both sides of the reducer and is provided with mounting side plates 14. The mounting side plates are connected to the force-bearing pull rod shaft, and weight-reducing holes 15 are opened on the surface of the mounting side plates. While reducing the weight, the distance between the movable frame and the fixed frame is shortened, so that the force-bearing pull rod does not need to be set too long, and its limited pulling effect is good.

[0025] After the motor is installed on the movable frame, the vertical support frame will interfere with the motor, so the vertical support frame is designed to include two vertical connecting arms 16. Figure 3 As shown, the vertical connecting arm is connected to the mounting side plate through two tension rods, which effectively avoids the installation of the motor while ensuring strength.

[0026] Specifically, positioning and mounting grooves are provided on the motor, vertical connecting arm, mounting vertical plates corresponding to the mounting side plates, and mounting top plates to facilitate assembly and improve assembly accuracy and quality.

[0027] Reference Figure 4As shown, the gas spring includes a shock absorber 17, one end of which is connected to the top shaft of the movable frame, and the other end is connected to the bottom shaft of the mounting top plate. A limit plate 18 is provided at the end of the shock absorber's telescopic rod, and a limit nut 19 is provided on the shock absorber body. A spring 20 is provided on the shock absorber between the limit plate and the limit nut. By rotating the limit nut, it can compress the spring, thereby increasing the retraction pressure of the gas spring, that is, requiring a greater force to retract it. The limit nut can be rotated away from the limit plate, that is, the compressed spring is released, thereby reducing the retraction pressure of the gas spring, that is, it does not require a large force to retract it. This makes the shock absorption and buffering capacity of the gas spring adjustable to suit different application occasions.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An integrated oil-gas spring suspension, characterized by: It includes a movable frame and a fixed frame, the movable frame is provided with a motor and a reducer, the output shaft of the reducer is fixedly connected to the Mecanum wheel, the fixed frame includes a mounting top plate, a vertical support frame is provided at the bottom of the mounting top plate, two force-bearing pull rods are provided parallel to both sides of the vertical support frame and the side wall of the movable frame, the force-bearing pull rods are connected to the vertical support frame and the movable frame through a fixed pin shaft, and an oil-gas spring is further provided between the bottom of the mounting top plate and the top of the movable frame, and the oil-gas spring is arranged at an angle.

2. The integrated oil-gas spring suspension according to claim 1, characterized in that: An axis connection seat is provided at the bottom of the mounting top plate, and the axis connection seat is connected to the oil and gas spring shaft. An oblong locking hole is provided on the mounting top plate corresponding to the axis connection seat and is locked by screws. A limiting bolt is provided on the vertical support frame, and the limiting bolt abuts against one side surface of the axis connection seat. The setting direction of the oblong locking hole is consistent with the axial direction of the limiting bolt.

3. The integrated oil-gas spring suspension according to claim 2, characterized in that: A fastening nut is provided on the limiting bolt.

4. The integrated oil-gas spring suspension according to claim 1, characterized in that: The movable frame includes a mounting vertical plate, and the mounting vertical plate is provided with mounting side plates on both sides of the reducer. The mounting side plates are connected to the stressed pull rod shaft, and weight-reducing holes are opened on the surface of the mounting side plates.

5. The integrated oil-gas spring suspension according to claim 4, characterized in that: The vertical support frame includes two vertical connecting arms, and the vertical connecting arms are connected to the mounting side plates through two stress-bearing pull rods.

6. The integrated oil-gas spring suspension according to claim 5, characterized in that: Positioning installation grooves are provided on the installation vertical plate and the installation top plate.

7. The integrated oil-gas spring suspension according to claim 1, characterized in that: The oil-gas spring includes a shock absorber, one end of which is connected to the top shaft of the movable frame, and the other end of which is connected to the bottom shaft of the mounting top plate. A limiting plate is provided at the end of the telescopic rod of the shock absorber, a limiting nut is provided on the body of the shock absorber, and a spring is provided on the shock absorber between the limiting plate and the limiting nut.

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