Hydraulic cylinder buffer structure
By installing wedge-shaped sliders and connecting rod structures on both sides of the hydraulic cylinder body, buffer protection for the piston rod is achieved, solving the problem of mediocre buffering effect caused by the lack of a buffering structure in the cylinder body itself, and improving the overall buffering effect and maintenance convenience of the hydraulic cylinder.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI HENGDA HYDRAULIC EQUIP CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-05-29
AI Technical Summary
Existing hydraulic cylinders control the speed of the piston end through a throttling effect, but the cylinder body itself does not have a buffer protection structure, resulting in a mediocre buffering effect.
A slide rail structure is installed on both sides of the cylinder body, and a slider is fixedly connected to the piston rod. The slider has a wedge-shaped cross-section. Through the cooperation of the connecting rod and the rectangular plate, the piston rod is buffered and protected. The buffer structure is detachable.
It improves the buffering effect of the hydraulic cylinder, has a compact structure, is easy to install and maintain, and solves the problem of the cylinder body itself not having buffer protection.
Smart Images

Figure CN224301151U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of hydraulic cylinder buffer auxiliary structure, and in particular to a hydraulic cylinder buffer structure. Background Technology
[0002] As the core actuator of a hydraulic system, the technological evolution and application expansion of the hydraulic cylinder's buffer structure directly affect the performance limits and reliability of industrial equipment. The core principle of a hydraulic cylinder buffer device is to control the piston's end speed through a throttling effect.
[0003] Existing hydraulic cylinders control the piston end speed through throttling effect, but lack a buffer protection structure in the cylinder body itself, resulting in a mediocre buffering effect. Therefore, designing a hydraulic cylinder buffer structure to solve the above-mentioned technical problems is particularly important. Utility Model Content
[0004] The purpose of this invention is to solve the problem that existing hydraulic cylinders control the piston end speed through throttling effect, but the cylinder body itself does not have a buffer protection structure, resulting in a mediocre buffering effect. Therefore, this invention proposes a hydraulic cylinder buffering structure.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a hydraulic cylinder buffer structure, comprising a cylinder body, an oil inlet provided on the cylinder body, the oil inlet being connected to the interior of the cylinder body via a pipe, a slidable piston rod installed in the cylinder body, a connecting seat fixedly connected to the piston rod, slide rails symmetrically distributed on the cylinder body, a slidable slider installed in the slide rails, and a groove provided in the slide rails that matches the slider.
[0006] Preferably, a connecting rod is mounted above the slider via a rectangular plate and fasteners, and the end of the connecting rod is detachably connected to the connecting seat via bolts.
[0007] Preferably, the connecting rod and related components are symmetrically distributed on both sides of the cylinder.
[0008] Preferably, a limiting plate is fixedly connected to the left end of the piston rod, and a sealing ring is provided at the position where the cylinder body abuts the piston rod.
[0009] Preferably, the cross-section of the slider is wedge-shaped.
[0010] Compared with the prior art, the advantages and positive effects of this utility model are as follows:
[0011] 1. In this utility model, during use, a slide rail structure is installed on both sides of the cylinder body, and a bolt is used to install the connecting rod on the connecting seat at the right end. Then, the connection between the connecting rod and the slider is completed by the cooperation of the rectangular plate and the fastener. Since the cross-section of the slider is wedge-shaped, it is ensured that the slider is not easy to slip out when sliding in the slide groove. Compared with the conventional case where no buffer structure is set on the cylinder body, the technical solution adopted by this utility model can realize the buffer assistance of the entire piston rod structure. The buffer structure is detachably connected on the cylinder body, which improves the overall buffering effect of the hydraulic cylinder. The overall structure is compact, the spatial layout is reasonable, and it is easy to install and maintain. It solves the problem that the existing hydraulic cylinder controls the movement speed of the piston end through the throttling effect, and the buffering effect is generally poor because no buffer protection structure is set in the cylinder body itself.
[0012] 2. In this utility model, during use, the connecting rod and related components are symmetrically distributed on both sides of the cylinder to form a buffer from both sides. The left end of the piston rod is fixedly connected to a limiting plate. Through the structural design of the limiting plate, it is beneficial to limit the stroke of the piston rod in the cylinder. Attached Figure Description
[0013] Figure 1 This is an overall view of the hydraulic cylinder buffer structure of this utility model;
[0014] Figure 2 This is a partial structural diagram of the slider and slide rail in the hydraulic cylinder buffer structure of this utility model;
[0015] Legend: 1. Cylinder body; 101. Oil inlet; 102. Pipe; 2. Piston rod; 201. Limiting plate; 202. Sealing ring; 3. Connecting seat; 4. Slide rail; 401. Slider; 402. Slide groove; 5. Rectangular plate; 501. Connecting rod; 502. Fastener; 503. Bolt. Detailed Implementation
[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0017] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.
[0018] This utility model provides a hydraulic cylinder buffer structure, including a cylinder body 1. The cylinder body 1 has an oil inlet 101 connected to the interior of the cylinder body 1 via a pipe 102. A slidable piston rod 2 is installed inside the cylinder body 1, and a connecting seat 3 is fixedly connected to the piston rod 2. Slide rails 4 are symmetrically distributed on the cylinder body 1, and a slidable slider 401 is installed in each slide rail 4. The slide rail 4 has a groove 402 that matches the slider 401. The slider 401 has a wedge-shaped cross-section. A connecting rod 501 is installed above the slider 401 via a rectangular plate 5 and fasteners 502. The end of the connecting rod is detachably connected to the connecting seat 3 via bolts 503, facilitating the installation and removal of the connecting rod at the connecting seat 3.
[0019] In actual use, the hydraulic cylinder buffer structure has symmetrically distributed slide rails 4 on both sides of the cylinder body 1, and a connecting seat 3 is installed on the piston rod 2. Connecting rods are installed on both sides of the connecting seat 3 by bolts 503. The ends of the connecting rods are then connected to the slider 401 by rectangular plates 5 and fasteners 502, allowing the connecting rod 501 and slider 401 to slide in the slide rails 4, providing a buffering effect for the piston rod 2 during sliding. Since the cross-section of the slider 401 is wedge-shaped, it can effectively reduce the sliding speed of the piston rod 2 when sliding in the groove 402, thus providing buffering protection for its own structure. The connecting seat 3 and the connecting rod 501, as well as the slider 401 and the connecting rod 501, are all detachable for easy disassembly and maintenance. A seal is provided at the contact point between the cylinder body 1 and the piston rod 2. Circle 202 completes the sealing treatment at the contact position between piston rod 2 and cylinder body 1, ensuring the relative sealing of the contact position between piston rod 2 and cylinder body 1. By installing slide rail 4 on both sides of cylinder body 1, and simultaneously mounting the connecting rod on the connecting seat 3 with bolt 503 at the right end of the connecting rod, and then completing the connection between the connecting rod and slider 401 by the cooperation of rectangular plate 5 and fastener 502. Since the cross-section of slider 401 is wedge-shaped, it is ensured that slider 401 is not easy to slide out when sliding in slide groove 402. Compared with the conventional case where no buffer structure is set on cylinder body 1, the technical solution adopted by this utility model can realize the buffer assistance of the entire structure of piston rod 2. The buffer structure is detachably connected on cylinder body 1, improving the overall buffering effect of hydraulic cylinder. The overall structure is compact, the spatial layout is reasonable, and it is easy to install and maintain.
[0020] Example 1
[0021] like Figure 1-2 As shown, the connecting rod 501 and related components are symmetrically distributed on both sides of the cylinder body 1. A limit plate 201 is fixedly connected to the left end of the piston rod 2. A sealing ring 202 is provided at the position where the cylinder body 1 abuts against the piston rod 2.
[0022] The effect achieved by the entire embodiment 1 is that, in use, the connecting rod 501 and related components are symmetrically distributed on both sides of the cylinder 1 to form a buffer from both sides. The left end of the piston rod 2 is fixedly connected to the limiting plate 201. Through the structural design of the limiting plate 201, it is beneficial to limit the stroke of the piston rod 2 in the cylinder 1.
[0023] Working principle: Slide rail structures are symmetrically distributed on both sides of the cylinder body, and a connecting seat structure is installed on the piston rod. Connecting rods are bolted to both sides of the connecting seat, and the ends of the connecting rods are connected to the slider through rectangular plates and fasteners. This allows the connecting rod and slider to slide in the slide rails, providing a buffering effect for the piston rod during sliding. Because the slider has a wedge-shaped cross-section, it can effectively reduce the sliding speed of the piston rod when sliding in the groove, thus buffering and protecting its own structure. The connecting seat and connecting rod, as well as the slider and connecting rod, are all detachable, facilitating later disassembly and maintenance. A sealing ring is installed at the contact point between the cylinder body and the piston rod, ensuring a relatively tight seal at the contact point.
Claims
1. A hydraulic cylinder buffer structure, comprising a cylinder body (1), wherein an oil inlet (101) is provided on the cylinder body (1), and the oil inlet (101) is connected to the interior of the cylinder body (1) via a pipe (102), characterized in that, A slidable piston rod (2) is installed in the cylinder (1), and a connecting seat (3) is fixedly connected to the piston rod (2). Slide rails (4) are symmetrically distributed on the cylinder (1), and a slidable slider (401) is installed in the slide rail (4). A slide groove (402) that matches the slider (401) is provided in the slide rail (4).
2. The hydraulic cylinder buffer structure according to claim 1, characterized in that, A connecting rod (501) is mounted above the slider (401) via a rectangular plate (5) and fasteners (502). The end of the connecting rod (501) is detachably connected to the connecting seat (3) via bolts (503).
3. The hydraulic cylinder buffer structure according to claim 2, characterized in that, The connecting rod (501) and related components are symmetrically distributed on both sides of the cylinder (1).
4. The hydraulic cylinder buffer structure according to claim 1, characterized in that, A limiting plate (201) is fixedly connected to the left end of the piston rod (2), and a sealing ring (202) is provided at the position where the cylinder (1) abuts the piston rod (2).
5. The hydraulic cylinder buffer structure according to claim 1, characterized in that, The cross-section of the slider (401) is wedge-shaped.