Impact-resistant buffer sleeve for hydraulic cylinders

Abstract

The utility model relates to hydraulic cylinder technical field especially relates to a kind of impact-resistant type buffer sleeve for hydraulic cylinder, including hydraulic cylinder shell, sleeve outer layer, sleeve inner layer, hydraulic rod, buffer assembly and impact component, the inside of hydraulic cylinder shell is provided with sleeve outer layer, and the one end of sleeve outer layer is provided with buffer groove, the outside of buffer groove is provided with buffer assembly, buffer assembly is symmetrically provided with two groups, and the one end of buffer assembly is provided with sleeve inner layer, the inside of sleeve inner layer is provided with impact component, impact component and sleeve inner layer slidingly connect, and the outside of sleeve inner layer is provided with sleeve outer layer;The utility model compared with prior art buffer sleeve, can realize progressive buffering, better relieve impact, reduce abrasion condition, especially under high impact working condition, effectively improve the impact resistance, extend the service life of buffer sleeve, to solve the problem that spring buffering structure fatigue fracture is easily caused by long-term use, frequently replaced, enhance the practical value of buffer sleeve.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to an impact-resistant buffer sleeve for hydraulic cylinders. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy to perform linear reciprocating motion. When performing reciprocating motion, the movement is smooth and there is no transmission backlash, which is why it is widely used. When a hydraulic cylinder is used to drive a mechanism, the kinetic energy is relatively large when the movement reaches the end of the stroke, which causes the hydraulic cylinder piston to collide with the cylinder head, generating impact and noise. In order to mitigate and prevent this damage, a buffer sleeve needs to be installed in the cylinder body.

[0003] Under high impact, the hydraulic cylinder piston repeatedly strikes the bottom of the buffer sleeve, causing a huge impact on the buffer structure. The existing spring buffer structure has a significant initial buffering effect, but it cannot achieve progressive buffering. Long-term use can easily cause spring fatigue and breakage, requiring frequent replacement and reducing work efficiency.

[0004] Therefore, in view of the poor reliability of existing spring buffer structures under high impact, an impact-resistant buffer sleeve for hydraulic cylinders can be designed. By setting a three-stage sleeve, progressive buffering can be achieved, which can alleviate the impact and wear under high impact, extend the service life of the sleeve, and improve the working efficiency of the hydraulic cylinder. Utility Model Content

[0005] To overcome the problem that most buffer sleeves are prone to fatigue fracture and poor reliability under high impact conditions due to long-term use of the internal spring buffer structure.

[0006] The technical solution of this utility model is as follows: an impact-resistant buffer sleeve for a hydraulic cylinder, comprising a hydraulic cylinder shell, an outer sleeve layer, an inner sleeve layer, a hydraulic rod, a buffer assembly, and an impact assembly. The outer sleeve layer is disposed inside the hydraulic cylinder shell, and a buffer groove is provided at one end of the outer sleeve layer. A buffer assembly is disposed outside the buffer groove. Two sets of buffer assemblies are symmetrically arranged. The inner sleeve layer is disposed at one end of the buffer assembly. An impact assembly is disposed inside the inner sleeve layer. The impact assembly is slidably connected to the inner sleeve layer. The outer sleeve layer is disposed outside the inner sleeve layer.

[0007] Preferably, when the hydraulic cylinder is working, in order to mitigate the impact of the impact component and the oil on the hydraulic cylinder housing, a buffer sleeve is provided. The impact component drives the hydraulic rod to slide in the inner layer of the sleeve, which in turn drives the oil into the buffer component. The impact energy is dispersed and weakened by the buffer component. The impact component slowly enters the bottom groove of the outer layer of the sleeve, thereby achieving progressive buffering of the sleeve, mitigating the impact and wear on the hydraulic cylinder under high impact, extending the service life, and enhancing the practical value of the buffer sleeve.

[0008] Preferably, the buffer assembly includes a primary sleeve, a secondary sleeve, and a tertiary sleeve. The primary sleeve is provided at both ends of the inner layer of the sleeve, the secondary sleeve is provided at one end of the primary sleeve, the inner diameter of the secondary sleeve is the same as the outer diameter of the primary sleeve, the tertiary sleeve is provided at one end of the secondary sleeve, the outer diameter of the secondary sleeve is the same as the inner diameter of the tertiary sleeve, and the outer layer of the sleeve is provided at the other end of the tertiary sleeve.

[0009] Preferably, the buffer assembly also includes diversion holes, with diversion holes respectively provided on the side walls of the secondary and tertiary sleeves, and multiple sets of diversion holes are provided.

[0010] Preferably, the inner wall of the primary sleeve is provided with spiral grooves, and the material of the primary sleeve includes, but is not limited to, aluminum alloy, polyurethane-graphene composite material, carbon fiber or fiberglass.

[0011] Preferably, the diversion holes of the secondary sleeve and the diversion holes of the tertiary sleeve are staggered, and the materials of the secondary and tertiary sleeves include, but are not limited to, nickel-titanium shape memory alloy, stainless steel or graphene composite material.

[0012] Preferably, the impact assembly includes a first buffer block, a piston, and a second buffer block. The second buffer block is disposed inside the buffer groove and is slidably connected to the buffer groove. A piston is disposed at one end of the second buffer block, and the first buffer block is disposed at one end of the piston. A hydraulic rod is disposed at one end of the first buffer block.

[0013] Preferably, the impact assembly also includes a sealing ring and an annular groove. The piston is wrapped with a sealing ring, and multiple sets of sealing rings are provided. The outer wall of the piston is provided with an annular groove, and multiple sets of annular grooves are provided.

[0014] The beneficial effects of this utility model are:

[0015] Compared to existing buffer sleeves, this one can achieve progressive buffering, better mitigate impact, and reduce wear. Especially under high impact conditions, it effectively improves impact resistance and extends the service life of the buffer sleeve. This solves the problem that most buffer sleeves are prone to fatigue fracture of the spring buffer structure under high impact after long-term use, requiring frequent replacement, thus enhancing the practical value of the buffer sleeve. Attached Figure Description

[0016] Figure 1 The diagram shows a three-dimensional structural schematic of an impact-resistant buffer sleeve for a hydraulic cylinder according to this utility model.

[0017] Figure 2 The diagram shows a three-dimensional structural schematic of a buffer assembly for an impact-resistant buffer sleeve for a hydraulic cylinder according to this utility model.

[0018] Figure 3The diagram shows a three-dimensional structural schematic of an impact assembly for an impact-resistant buffer sleeve for a hydraulic cylinder according to this utility model.

[0019] Figure 4 The diagram shows a three-dimensional structure of the piston of an impact-resistant buffer sleeve for a hydraulic cylinder according to this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Hydraulic cylinder housing; 2. Outer layer of sleeve; 201. Buffer groove; 3. Inner layer of sleeve; 301. Primary sleeve; 302. Secondary sleeve; 303. Tertiary sleeve; 304. Diverter hole; 305. Spiral groove; 4. Hydraulic rod; 401. First buffer block; 402. Piston; 403. Second buffer block; 404. Sealing ring; 405. Annular groove. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please see Figure 1 This utility model provides an embodiment: an impact-resistant buffer sleeve for a hydraulic cylinder, comprising a hydraulic cylinder shell 1, an outer sleeve layer 2, an inner sleeve layer 3, a hydraulic rod 4, a buffer assembly, and an impact assembly. The outer sleeve layer 2 is disposed inside the hydraulic cylinder shell 1. A buffer groove 201 is provided at one end of the outer sleeve layer 2. A buffer assembly is disposed outside the buffer groove 201. Two sets of buffer assemblies are symmetrically arranged. The inner sleeve layer 3 is disposed at one end of the buffer assembly. An impact assembly is disposed inside the inner sleeve layer 3. The impact assembly is slidably connected to the inner sleeve layer 3. The outer sleeve layer 2 is disposed outside the inner sleeve layer 3.

[0023] Please see Figure 2 and Figure 4In this embodiment, the buffer assembly includes a primary sleeve 301, a secondary sleeve 302, a tertiary sleeve 303, and a diversion hole 304. Primary sleeves 301 are provided at both ends of the inner layer 3 of the sleeve. Spiral grooves 305 are formed on the inner wall of the primary sleeve 301. The material of the primary sleeve 301 includes, but is not limited to, aluminum alloy, polyurethane-graphene composite material, carbon fiber, or fiberglass. A secondary sleeve 302 is provided at one end of the primary sleeve 301, with the inner diameter of the secondary sleeve 302 being the same as the outer diameter of the primary sleeve 301. A tertiary sleeve 303 is provided at one end of the secondary sleeve 302, with the outer diameter of the secondary sleeve 302 being the same as the inner diameter of the tertiary sleeve 303. The materials of the secondary sleeve 302 and the tertiary sleeve 303 include, but are not limited to, nickel-titanium alloy. The secondary sleeve 302 and the tertiary sleeve 303 are respectively provided with flow diversion holes 304 on their side walls. Multiple sets of flow diversion holes 304 are provided and are staggered. In this embodiment, the primary sleeve 301 is made of aluminum alloy, which has strong impact resistance and can withstand instantaneous impact. The spiral groove 305 forms a swirling deceleration zone, which reduces the oil flow rate and disperses the impact energy. The secondary sleeve 302 and the tertiary sleeve 303 are made of graphene composite material, which has high impact resistance and strong friction resistance. The flow diversion holes 304 are staggered to achieve pressure dispersion. In conjunction with the graphene composite material to absorb residual energy, the buffer sleeve is stepped and gradually absorbs energy, which alleviates the wear caused by the instantaneous huge impact force on the sleeve.

[0024] Please see Figure 2 and Figure 3 In this embodiment, the impact assembly includes a first buffer block 401, a piston 402, a second buffer block 403, a sealing ring 404, and an annular groove 405. The second buffer block 403 is disposed inside the buffer groove 201 and is slidably connected to it. A piston 402 is disposed at one end of the second buffer block 403. The piston 402 is surrounded by a sealing ring 404, and multiple sets of sealing rings 404 are provided. An annular groove 405 is formed on the outer wall of the piston 402. Multiple sets of buffer blocks are provided at 405. A first buffer block 401 is provided at one end of the piston 402, and a hydraulic rod 4 is provided at one end of the first buffer block 401. The hydraulic rod 4 is pushed by the oil, which drives the first buffer block 401, and then pushes the piston 402 and the second buffer block 403, so that the second buffer block 403 enters the buffer groove 201. In this embodiment, the sealing ring 404 increases the friction of the piston 402 sliding in the inner layer 3 of the sleeve, reducing the impact on the bottom of the sleeve. The oil flows through the annular groove 405, reducing the flow rate.

[0025] When the hydraulic cylinder is working, the hydraulic fluid pushes the hydraulic rod 4, which in turn drives the first buffer block 401, and then pushes the piston 402 and the second buffer block 403. At the same time, the sealing ring 404 increases the friction of the piston 402 sliding in the inner layer 3 of the sleeve. The oil enters the annular groove 405, where the flow rate decreases. The oil pushes the piston 402 and the second buffer block 403 into the first-stage sleeve 301. Through the swirling deceleration zone formed by the spiral groove 305, in conjunction with the annular groove 405, the oil flow rate is further reduced, dispersing the impact energy, thereby reducing the moving speed of the piston 402. This pushes the piston 402 into the second-stage sleeve 302. The oil flows out from the diversion hole 304 and enters the third-stage sleeve 303, achieving pressure reduction and absorbing residual kinetic energy. The second buffer block 403 enters the buffer groove 201 through the third-stage sleeve 303. At the same time, the oil pushes the piston 402, which drives the first buffer block 401 and the hydraulic rod 4 to move in the opposite direction, re-entering the buffer assembly. This process repeats continuously.

[0026] Through the above steps, in order to mitigate the impact of the impact component and oil on the hydraulic cylinder housing 1, a buffer sleeve is set up. The impact component drives the hydraulic rod 4 to slide in the inner layer 3 of the sleeve, which in turn drives the oil into the buffer component. The impact energy is dispersed and weakened by the buffer component. The impact component slowly enters the bottom groove of the outer layer 2 of the sleeve, thereby realizing the progressive buffering of the sleeve, mitigating the impact and wear on the hydraulic cylinder under high impact, extending the service life, and enhancing the practical value of the buffer sleeve.

[0027] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An impact-resistant buffer sleeve for a hydraulic cylinder, comprising a hydraulic cylinder housing (1) and a hydraulic rod (4), characterized in that: It also includes an outer sleeve layer (2), an inner sleeve layer (3), a buffer assembly, and an impact assembly. The inner side of the hydraulic cylinder housing (1) is provided with an outer sleeve layer (2). One end of the outer sleeve layer (2) is provided with a buffer groove (201). The outside of the buffer groove (201) is provided with a buffer assembly. Two sets of buffer assemblies are symmetrically arranged. One end of the buffer assembly is provided with an inner sleeve layer (3). The inside of the inner sleeve layer (3) is provided with an impact assembly. The impact assembly is slidably connected to the inner sleeve layer (3). The outside of the inner sleeve layer (3) is provided with an outer sleeve layer (2).

2. The impact-resistant buffer sleeve for hydraulic cylinders according to claim 1, characterized in that: The buffer assembly includes a primary sleeve (301), a secondary sleeve (302), and a tertiary sleeve (303). The inner layer (3) of the sleeve is provided with a primary sleeve (301) at both ends, a secondary sleeve (302) is provided at one end of the primary sleeve (301), the inner diameter of the secondary sleeve (302) is the same as the outer diameter of the primary sleeve (301), a tertiary sleeve (303) is provided at one end of the secondary sleeve (302), the outer diameter of the secondary sleeve (302) is the same as the inner diameter of the tertiary sleeve (303), and an outer layer (2) of the sleeve is provided at the other end of the tertiary sleeve (303).

3. The impact-resistant buffer sleeve for hydraulic cylinders according to claim 2, characterized in that: The buffer assembly also includes a diversion hole (304). The secondary sleeve (302) and the tertiary sleeve (303) are respectively provided with diversion holes (304), and multiple sets of diversion holes (304) are provided.

4. The impact-resistant buffer sleeve for hydraulic cylinders according to claim 2, characterized in that: The inner wall of the primary sleeve (301) is provided with a spiral groove (305). The material of the primary sleeve (301) includes, but is not limited to, aluminum alloy, polyurethane-graphene composite material, carbon fiber or fiberglass.

5. The impact-resistant buffer sleeve for hydraulic cylinders according to claim 3, characterized in that: The diversion holes (304) of the secondary sleeve (302) and the diversion holes (304) of the tertiary sleeve (303) are staggered. The materials of the secondary sleeve (302) and the tertiary sleeve (303) include, but are not limited to, nickel-titanium shape memory alloy, stainless steel or graphene composite material.

6. The impact-resistant buffer sleeve for hydraulic cylinders according to claim 1, characterized in that: The impact assembly includes a first buffer block (401), a piston (402), and a second buffer block (403). The second buffer block (403) is disposed inside the buffer groove (201). The second buffer block (403) is slidably connected to the buffer groove (201). A piston (402) is disposed at one end of the second buffer block (403), and the first buffer block (401) is disposed at one end of the piston (402). A hydraulic rod (4) is disposed at one end of the first buffer block (401).

7. The impact-resistant buffer sleeve for a hydraulic cylinder according to claim 6, characterized in that: The impact assembly also includes a sealing ring (404) and an annular groove (405). The piston (402) is wrapped with a sealing ring (404), and multiple sets of sealing rings (404) are provided. The outer wall of the piston (402) is provided with an annular groove (405), and multiple sets of annular grooves (405) are provided.

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