Auxiliary spring device for hydraulic bushing

Abstract

The utility model discloses an auxiliary spring device for a hydraulic bushing, which comprises a metal protective layer, two ends of the outer side of the metal protective layer are provided with wear-resistant layers, the outer ends of the wear-resistant layers are provided with rubber layers, the outer ends of the rubber layers are fixedly connected with anti-dropping bulges, the inner sides of the wear-resistant layers are fixedly connected with clamping pieces, and the clamping pieces are fixedly connected with the rubber layers. The supporting piece, the movable piece, the limiting plate and the damping spring are arranged in the rubber layer in the hydraulic bushing, so that the buffering effect can be achieved, meanwhile, the annular hydraulic belt and the capillary hydraulic belt are arranged, and the liquid injection buffering effect of the hydraulic bushing can be achieved; multiple buffering of the device is achieved, and the protection capacity of the device to the transmission bearing is improved.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic bushings, in particular to an auxiliary spring device for hydraulic bushings. Background Art

[0002] Hydraulic bushing is an important component in hydraulic system, usually installed between the piston and cylinder of hydraulic cylinder, aiming to reduce friction, prevent leakage and improve sealing to ensure the smooth operation of hydraulic system. Hydraulic bushing is mainly made of wear-resistant, corrosion-resistant and high-strength materials, such as brass, steel or nylon, polytetrafluoroethylene and other plastic materials, which can withstand high pressure and large flow in hydraulic system to ensure the stability and safety of the system.

[0003] Chinese patent document CN108150536A discloses a hydraulic bushing. The hydraulic bushing includes a core shaft, a first flow channel body sleeved on the outside of the core shaft, and an outer sleeve pressed and sleeved on the outside of the first flow channel body. The gap between the core shaft and the first flow channel body is filled with a first rubber body, and a groove is constructed on the outer surface of the first flow channel body. Two liquid cavities for accommodating liquid are constructed radially opposite to each other on the first rubber body, wherein the groove and the outer sleeve form a flow channel, and the two liquid cavities are connected through the flow channel. The stiffness of the hydraulic bushing can be adjusted by the fluidity between the hydraulic fluids in the two liquid cavities, thereby improving the stability of the vehicle when driving, especially when the vehicle is turning;

[0004] However, in the above hydraulic bushing, the range of its stiffness and damping adjustment is still limited. Therefore, it is desirable in the art to provide a hydraulic bushing with a stiffness and damping that can be varied over a wider range, so as to provide a vehicle with higher driving stability and safety. Utility Model Content

[0005] The utility model aims to provide an auxiliary spring device for a hydraulic bushing, which solves the problem in the prior art that the range of adjustment of the stiffness and damping of the hydraulic bushing is still limited.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an auxiliary spring device for a hydraulic bushing, comprising a metal protective layer, wear-resistant layers are arranged at both ends of the outer side of the metal protective layer, a rubber layer is arranged at the outer end of the wear-resistant layer, an anti-slip protrusion is fixedly connected to the outer end of the rubber layer, and a clamping piece is fixedly connected to the inner side of the wear-resistant layer;

[0007] The anti-dropping protrusion corresponds to the engaging piece, and the inner end of the rubber layer is fixedly connected with a supporting piece.

[0008] As a further description of the above technical solution: the other end of the support member is movably connected to a movable member, and a limiting groove is provided inside the support member.

[0009] As a further description of the above technical solution: a damping spring is fixedly connected to the interior of the limiting groove, and the other end of the damping spring is fixedly connected to the limiting plate.

[0010] As a further description of the above technical solution: one end of the movable part passes through the limiting groove and is fixedly connected inwardly to the limiting plate.

[0011] As a further description of the above technical solution: annular hydraulic belts are provided at both ends of the inner part of the rubber layer, and a capillary hydraulic belt is provided in the middle part of the annular hydraulic belt.

[0012] As a further description of the above technical solution: a sealing block is provided corresponding to the liquid inlet of the annular hydraulic belt.

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

[0014] 1. Compared with the prior art, the auxiliary spring device for the hydraulic bushing can achieve a buffering effect by arranging a support member, a movable member, a limit plate and a damping spring in the rubber layer inside the hydraulic bushing, and at the same time, an annular hydraulic belt and a capillary hydraulic belt are arranged to achieve its injection buffering effect, thereby realizing multiple buffering of the device and improving the protection ability of the device for the transmission bearing;

[0015] 2. Compared with the prior art, the auxiliary spring device for the hydraulic bushing can seal the injection port of the annular hydraulic belt by setting a sealing block, thereby improving the sealing performance of the hydraulic component during use and preventing leakage of the internal damping buffer oil.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 It is a cross-sectional view of the utility model.

[0020] Figure 3 It is a schematic diagram of the internal structure of the movable part of the utility model.

[0021] Legend:

[0022] 1. Anti-slip protrusion; 2. Rubber layer; 3. Clamping piece; 4. Wear-resistant layer; 5. Metal protective layer; 6. Ring-shaped hydraulic belt; 7. Capillary hydraulic belt; 8. Support part; 9. Movable part; 10. Sealing block; 11. Limiting plate; 12. Limiting groove; 13. Damping spring. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0024] Reference Figure 1-3 The utility model provides an embodiment of an auxiliary spring device for a hydraulic bushing, comprising a metal protective layer 5, wear-resistant layers 4 are arranged at both ends of the outer side of the metal protective layer 5, and the wear-resistant performance of the contact surface between the entire bushing and the transmission bearing can be improved by arranging the wear-resistant layer 4, a rubber layer 2 is arranged at the outer end of the wear-resistant layer 4, an anti-slip protrusion 1 is fixedly connected to the outer end of the rubber layer 2, and a clamping member 3 is fixedly connected to the inner side of the wear-resistant layer 4;

[0025] The anti-drop protrusion 1 corresponds to the engaging member 3, and the inner end of the rubber layer 2 is fixedly connected with a supporting member 8. By arranging the anti-drop protrusion 1 and the engaging member 3, the entire hydraulic bushing can be assembled, thereby improving the stability of the entire hydraulic bushing during use. The supporting member 8 and the movable member 9 in the device are both made of rubber, which itself has a certain elastic buffering capacity;

[0026] The other end of the support member 8 is movably connected with a movable member 9, a limiting groove 12 is provided inside the support member 8, a damping spring 13 is fixedly connected inside the limiting groove 12, the other end of the damping spring 13 is fixedly connected to the limiting plate 11, one end of the movable member 9 passes through the limiting groove 12 and is fixedly connected to the limiting plate 11 inwardly, when the entire rubber layer 2 is subjected to external force, the movable member 9 drives the limiting plate 11 to squeeze the damping spring 13 in the limiting groove 12, and under the action of the damping spring 13, its shock absorbing and buffering effect can be achieved, thereby ensuring that the entire bushing has multiple shock absorbing capabilities and improving the protection capability of the transmission bearing;

[0027] Annular hydraulic belts 6 are provided at both ends of the inner part of the rubber layer 2, and a capillary hydraulic belt 7 is provided in the middle of the annular hydraulic belt 6. When the outer part of the bushing is squeezed by pressure, the damping buffer oil in the annular hydraulic belt 6 is pressed into the capillary hydraulic belt 7 to buffer the pressure, and the annular hydraulic belt 6 itself will also generate deformation buffer pressure. When the pressure disappears, the annular hydraulic belt 6 recovers its deformation, and the damping buffer oil in the capillary hydraulic belt 7 flows back into the annular hydraulic belt 6 to realize its buffering ability.

[0028] A sealing block 10 is provided corresponding to the liquid inlet of the annular hydraulic belt 6. The sealing block 10 can seal the liquid injection port of the annular hydraulic belt 6 to prevent leakage of the internal damping buffer oil during use, thereby improving the use effect of the device.

[0029] Working principle: When the device is in use, the transmission bearing that needs to be protected is first passed through the bushing body. When the outside of the bushing is squeezed by pressure, the damping buffer oil in the annular hydraulic belt 6 is pressed into the capillary hydraulic belt 7 to buffer the pressure. The annular hydraulic belt 6 itself will also generate deformation buffer pressure. When the pressure disappears, the annular hydraulic belt 6 restores its deformation, and the damping buffer oil in the capillary hydraulic belt 7 flows back into the annular hydraulic belt 6. When the entire rubber layer 2 is subjected to external force, the movable part 9 drives the limit plate 11 to squeeze the damping spring 13 in the limit groove 12. Under the action of the damping spring 13, its shock-absorbing and buffering effect can be achieved, thereby ensuring that the entire bushing has multiple shock-absorbing capabilities and improving the protection capability of the transmission bearing.

[0030] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. An auxiliary spring device for a hydraulic bushing, comprising a metal protective layer (5), characterized in that: The outer ends of the metal protective layer (5) are provided with a wear-resistant layer (4), the outer ends of the wear-resistant layer (4) are provided with a rubber layer (2), the outer ends of the rubber layer (2) are fixedly connected with an anti-slip protrusion (1), and the inner side of the wear-resistant layer (4) is fixedly connected with a clamping piece (3); The anti-slip protrusion (1) corresponds to the engaging piece (3), and the inner end of the rubber layer (2) is fixedly connected to a supporting piece (8).

2. An auxiliary spring device for a hydraulic bushing according to claim 1, characterized in that: The other end of the support member (8) is movably connected to a movable member (9), and a limiting groove (12) is provided inside the support member (8).

3. An auxiliary spring device for a hydraulic bushing according to claim 2, characterized in that: A damping spring (13) is fixedly connected inside the limiting groove (12), and the other end of the damping spring (13) is fixedly connected to the limiting plate (11).

4. An auxiliary spring device for a hydraulic bushing according to claim 2, characterized in that: One end of the movable member (9) passes through the limiting groove (12) and is fixedly connected inwardly to the limiting plate (11).

5. An auxiliary spring device for a hydraulic bushing according to claim 1, characterized in that: Annular hydraulic belts (6) are provided at both ends of the inner part of the rubber layer (2), and a capillary hydraulic belt (7) is provided in the middle part of the annular hydraulic belt (6).

6. An auxiliary spring device for a hydraulic bushing according to claim 5, characterized in that: A sealing block (10) is provided corresponding to the liquid inlet of the annular hydraulic belt (6).

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