Hydraulic cylinder buffering structure

Abstract

The utility model relates to the technical field of hydraulic cylinders, and discloses a hydraulic cylinder buffer structure which comprises a hydraulic cylinder piston rod, a guide sleeve and a shaft sleeve are sleeved on the outer circumference of the hydraulic cylinder piston rod in a clearance fit mode, the rod end portion of the piston rod is provided with a buffer block in a connecting mode, and the other end of the buffer block is provided with a piston in a connecting mode. The outer diameter of the buffer block is in clearance fit with the inner diameter of the guide sleeve by 0.05-0.1 mm, and when the piston rod returns, the buffer block enters the guide sleeve to form a hydraulic oil throttling channel. According to the hydraulic cylinder buffering structure, the progressive throttling effect is formed when the buffering block enters the guide sleeve, so that the movement of the hydraulic cylinder is greatly reduced, the hydraulic cylinder is protected against impact, the buffering effect is achieved, and the technical problem that the hydraulic cylinder is damaged due to the fact that a piston of the hydraulic cylinder rapidly moves to impact the guide sleeve is solved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a hydraulic cylinder buffer structure for mitigating the impact force generated when the hydraulic cylinder piston strikes the guide sleeve. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion. It has a simple structure and reliable operation. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device, eliminates transmission backlash, and provides smooth movement. Therefore, it is widely used in the hydraulic systems of various machines.

[0003] In existing technologies, during the operation of a hydraulic cylinder, the rapid movement of the piston often generates a significant impact force on the guide sleeve. This not only damages the hydraulic cylinder but also shortens its service life. Therefore, designing a buffer structure that can effectively reduce the impact of the hydraulic cylinder piston on the guide sleeve is particularly important. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a hydraulic cylinder buffer structure. Through the gradual throttling effect formed when the buffer block enters the guide sleeve, the movement of the hydraulic cylinder is significantly reduced, thereby protecting the hydraulic cylinder from impact and achieving a buffering effect. This solves the technical problem of hydraulic cylinder damage caused by the rapid movement of the hydraulic cylinder piston impacting the guide sleeve.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic cylinder buffer structure, including a hydraulic cylinder piston rod, on the outer circumference of which a guide sleeve and a bushing are fitted with a clearance fit. A buffer block is connected to the end of the piston rod, and a piston is connected to the other end of the buffer block. The outer diameter of the buffer block and the inner diameter of the guide sleeve form a clearance fit of 0.05-0.1mm. When the piston rod returns, the buffer block enters the guide sleeve to form a hydraulic oil throttling channel.

[0008] Furthermore, sleeves are fitted onto the outer diameter circumference of the guide sleeve, bushing, and piston using a clearance fit.

[0009] Furthermore, the buffer block is connected to the end of the piston rod with an interference fit of 0.02-0.03 mm.

[0010] Furthermore, the inner wall of the guide sleeve is provided with an annular oil storage groove, the depth of which is 1 / 8 to 1 / 5 of the diameter of the buffer block.

[0011] Furthermore, the outer circumferential surface of the buffer block is divided into a planar segment and a conical transition segment. The inclination angle of the conical transition segment is 30°-45°, and the length of the conical transition segment accounts for 1 / 3-1 / 2 of the total length of the buffer block.

[0012] Furthermore, a sealing ring is provided between the outer diameter of the guide sleeve and the bushing and the inner diameter of the sleeve.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, the present invention provides a hydraulic cylinder buffer structure, which has the following beneficial effects:

[0015] 1. The hydraulic cylinder buffer structure mainly consists of two parts: a guide sleeve and a buffer block. It has a simple structure, is easy to process and install, and does not require complicated tools and equipment during installation.

[0016] 2. The hydraulic cylinder buffer structure uses a buffer block fixed to the end of the hydraulic cylinder piston rod to first enter the inner cavity of the guide sleeve through a conical transition section. The conical structure design with an inclination angle of 30°-45° gradually reduces the cross-sectional area of ​​the oil flow, forming a progressive throttling effect. Due to the throttling effect, the movement of the hydraulic cylinder is greatly reduced, thereby protecting the hydraulic cylinder from impact, achieving a buffering effect, improving the service life of the hydraulic cylinder, and reducing maintenance costs. Attached Figure Description

[0017] Figure 1 This utility model provides a schematic diagram of a hydraulic cylinder buffer structure for extending the hydraulic cylinder piston rod.

[0018] Figure 2 This utility model provides a hydraulic cylinder buffer structure, specifically a schematic diagram of the hydraulic cylinder piston rod return stroke.

[0019] In the diagram: 1. Hydraulic cylinder piston rod; 2. Guide sleeve; 3. Bushing; 4. Buffer block; 401. Planar section; 402. Conical transition section; 5. Piston; 6. Sleeve; 7. Annular oil reservoir; 8. Sealing ring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-2A hydraulic cylinder buffer structure includes a hydraulic cylinder piston rod 1. A guide sleeve 2 and a bushing 3 are fitted onto the outer circumference of the piston rod 1 with a clearance fit. A buffer block 4 is connected to the end of the piston rod 1 with an interference fit of 0.02-0.03 mm. A piston 5 is connected to the other end of the buffer block 4. The outer diameter of the buffer block 4 and the inner diameter of the guide sleeve 2 form a clearance fit of 0.05-0.1 mm. When the piston rod 1 returns, the buffer block 4 enters the guide sleeve 2 to form hydraulic oil. Throttling channel; the inner wall of the guide sleeve 2 is provided with an annular oil reservoir 7, the depth of which is 1 / 8-1 / 5 of the diameter of the buffer block 4; the outer circumference of the buffer block 4 is divided into a flat section 401 and a conical transition section 402, the inclination angle of the conical transition section 402 is 30°-45°, and the length of the conical transition section 402 accounts for 1 / 3-1 / 2 of the total length of the buffer block 4; a sleeve 6 is fitted on the outer circumference of the guide sleeve 2, the bushing 3 and the piston 5 in a clearance fit; a sealing ring 8 is provided between the outer diameter of the guide sleeve 2 and the bushing 3 and the inner diameter of the sleeve 6.

[0022] The working principle of the above embodiments is as follows:

[0023] In operation, when the hydraulic cylinder piston rod 1 begins its return stroke, the buffer block 4 fixed to the end of the piston rod 1 first enters the inner cavity of the guide sleeve 2 through a tapered transition section 402. The tapered structure design with an inclination angle of 30°-45° gradually reduces the cross-sectional area for oil flow, creating a progressive throttling effect. Then, the flat section 401 continues to enter the inner cavity of the guide sleeve 2. This throttling effect significantly reduces the movement of the hydraulic cylinder, thus protecting it from impact and achieving a buffering effect.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic cylinder buffer structure, comprising a hydraulic cylinder piston rod (1), characterized in that: The outer circumference of the piston rod (1) of the hydraulic cylinder is fitted with a guide sleeve (2) and a bushing (3) in a clearance fit. A buffer block (4) is connected to the end of the piston rod (1), and a piston (5) is connected to the other end of the buffer block (4). The outer diameter of the buffer block (4) and the inner diameter of the guide sleeve (2) form a clearance fit of 0.05-0.1mm. When the piston rod (1) returns, the buffer block (4) enters the guide sleeve (2) to form a hydraulic oil throttling channel.

2. The hydraulic cylinder buffer structure according to claim 1, characterized in that: The guide sleeve (2), bushing (3) and piston (5) are fitted with sleeves (6) on their outer diameter circumference in a clearance fit.

3. The hydraulic cylinder buffer structure according to claim 1, characterized in that: The buffer block (4) is connected to the end of the piston rod (1) with an interference fit of 0.02-0.03 mm.

4. The hydraulic cylinder buffer structure according to claim 1, characterized in that: The inner wall of the guide sleeve (2) is provided with an annular oil storage groove (7), the depth of which is 1 / 8 to 1 / 5 of the diameter of the buffer block (4).

5. A hydraulic cylinder buffer structure according to claim 1, characterized in that: The outer circumferential surface of the buffer block (4) is divided into a planar segment (401) and a conical transition segment (402). The inclination angle of the conical transition segment (402) is 30°-45°, and the length of the conical transition segment (402) accounts for 1 / 3-1 / 2 of the total length of the buffer block (4).

6. A hydraulic cylinder buffer structure according to claim 2, characterized in that: A sealing ring (8) is provided between the outer diameter of the guide sleeve (2) and the bushing (3) and the inner diameter of the sleeve (6).

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