A floating sleeve combined bumper device suitable for large-bore hydraulic cylinders

Abstract

The utility model discloses a kind of floating sleeve combined type buffer devices suitable for large-bore hydraulic oil cylinder, including fixed outer sleeve, floating sleeve, the fixed outer sleeve is set in cylinder bottom;The fixed outer sleeve is connected between cylinder bottom by thread;The inside of the fixed outer sleeve is provided with stepped through-hole;The floating sleeve is set in the stepped through-hole of the fixed outer sleeve;The floating sleeve is located between the stepped through-hole of fixed outer sleeve and cylinder bottom;The floating sleeve and fixed outer sleeve are gap fit;Several buffer holes are set on the flange of one end of the floating sleeve;The buffer hole of the floating sleeve is communicated with oil outlet hole.Thread connection is used between fixed outer sleeve and cylinder bottom, which is convenient for maintenance and replacement;Mounting process hole is set on the outer end face of fixed outer sleeve body, which is convenient for mounting of fixed outer sleeve;Buffer hole on floating sleeve is convenient to process;By controlling the diameter and quantity of buffer hole, the through flow of oil can be controlled, and suitable buffering effect is realized.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical equipment technology, and further to the field of buffer equipment technology. Specifically, it relates to a floating sleeve combination buffer device suitable for large-diameter hydraulic cylinders, which has a simple structure, is easy to install, and has reliable performance. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy, performing linear reciprocating motion (or oscillating motion). The output force of a hydraulic cylinder is directly proportional to the effective area of ​​the piston and the pressure difference between its two sides. Hydraulic cylinders are simple in structure and reliable in operation. When using hydraulic cylinders to achieve reciprocating motion, a reduction gear is unnecessary, and there is no transmission backlash, resulting in smooth movement. Therefore, hydraulic cylinders are widely used in machine tool industries, metallurgical industries, construction machinery, agricultural machinery, automotive industries, and light textile industries.

[0003] When a hydraulic cylinder is working, the piston drives the load (such as a robotic arm, machine tool slide, or lifting platform) to move at high speed, generating significant inertia. At the end of its stroke, when the piston directly impacts the bottom of the hydraulic cylinder (cylinder head or end cap), a rigid impact occurs. This impact force is even greater for large-diameter hydraulic cylinders. Rigid impacts can easily damage internal components of the hydraulic cylinder, and in severe cases, may render the cylinder unusable, thus paralyzing the entire transmission system. In critical working environments, this can inevitably lead to serious safety accidents.

[0004] Therefore, the key to solving this problem is to research and develop a floating sleeve combination buffer device that is simple in structure, easy to install, and reliable in performance, suitable for large-diameter hydraulic cylinders. Utility Model Content

[0005] The purpose of this utility model is to provide a floating sleeve combined buffer device that is simple in structure, easy to install, and reliable in performance, suitable for large-diameter hydraulic cylinders.

[0006] The purpose of this utility model is achieved as follows: it includes a fixed outer sleeve and a floating sleeve. The fixed outer sleeve is disposed inside the cylinder bottom; the fixed outer sleeve and the cylinder bottom are connected by threads; a stepped through hole is provided inside the fixed outer sleeve; a floating sleeve is disposed inside the stepped through hole of the fixed outer sleeve; the floating sleeve is located between the stepped through hole of the fixed outer sleeve and the cylinder bottom; the floating sleeve and the fixed outer sleeve are clearance-fitted; several buffer holes are provided on the flange at one end of the floating sleeve; the buffer holes of the floating sleeve are connected to the oil outlet hole.

[0007] This utility model consists of a fixed outer sleeve and a floating sleeve; the fixed outer sleeve is connected to the cylinder bottom by a thread, which is convenient for maintenance and replacement; an installation process hole is provided on the outer end face of the fixed outer sleeve body to facilitate the installation of the fixed outer sleeve; the buffer hole on the floating sleeve is easy to process; by controlling the diameter and number of buffer holes, the flow rate of oil can be controlled to achieve a suitable buffering effect.

[0008] When the piston rod retracts, the piston moves towards the bottom of the cylinder. When one end of the piston rod enters the inner hole of the floating sleeve, the oil flows through the gap between the fixed outer sleeve and the floating sleeve, as well as the buffer holes on the floating sleeve, to the oil outlet at the bottom of the cylinder (see the oil flow arrow for details). By controlling the diameter and number of buffer holes, the flow rate of the oil can be controlled to achieve a suitable buffering effect.

[0009] This utility model has a simple structure, is easy to install, and has reliable performance, making it suitable for buffering the impact force of large-diameter hydraulic cylinders. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 Left-view diagram; Figure 3 This is a three-dimensional schematic diagram of the overall structure of this utility model; Figure 4 This is a schematic diagram of the fixed outer casing of this utility model; Figure 5 for Figure 4 Left-view diagram; Figure 6 This is a three-dimensional schematic diagram of the fixed outer casing of this utility model; Figure 7 This is a schematic diagram of the floating sleeve of this utility model; Figure 8 for Figure 7 Left-view diagram; Figure 9 This is a three-dimensional schematic diagram of the floating sleeve of this utility model; Figure 10 This is a schematic diagram of the working state of this utility model; Figure 11 for Figure 10 A schematic diagram of partial view A; Figure 12 This is a three-dimensional schematic diagram of the working state of this utility model.

[0011] 1-Fixed outer sleeve, 101-Fixed outer sleeve body, 102-Installation process hole, 103-External thread, 2-Floating sleeve, 201-Floating sleeve body, 202-Flange, 203-Buffer hole, 3-Cylinder bottom, 4-Connecting flange, 5-Piston, 6-Cylinder barrel, 7-Cylinder head, 8-Gland, 9-Piston rod, 10-Oil outlet hole. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings, but this does not limit the present invention in any way. Any modifications made based on the teachings of the present invention shall fall within the protection scope of the present invention.

[0013] like Figures 1-12 As shown, this utility model includes a fixed outer sleeve 1 and a floating sleeve 2. The fixed outer sleeve 1 is disposed inside the cylinder bottom 3. The fixed outer sleeve 1 and the cylinder bottom 3 are connected by threads. A stepped through hole is provided inside the fixed outer sleeve 1. The floating sleeve 2 is disposed inside the stepped through hole of the fixed outer sleeve 1. The floating sleeve 2 is located between the stepped through hole of the fixed outer sleeve 1 and the cylinder bottom 3. The floating sleeve 2 and the fixed outer sleeve 1 are clearance-fitted. Several buffer holes are provided on the flange at one end of the floating sleeve 2. The buffer holes of the floating sleeve 2 are connected to the oil outlet hole 10.

[0014] The fixing sleeve 1 includes a fixing sleeve body 101, a mounting process hole 102, and an external thread 103; the mounting process hole 102 is provided on the outer end face of the fixing sleeve body 101; the external thread 103 is provided on the outer circle of the fixing sleeve body 101.

[0015] The floating sleeve 2 includes a floating sleeve body 201, a flange 202, and buffer holes 203; one end of the floating sleeve body 201 is provided with a flange 202; and several buffer holes 203 are provided on the flange 202.

[0016] The diameter and number of the buffer holes 203 are adapted to the impact force of the hydraulic cylinder.

[0017] The working principle and process of this utility model: This utility model consists of a fixed outer sleeve 1 and a floating sleeve 2; the fixed outer sleeve 1 and the cylinder bottom 3 are connected by a thread, which is convenient for maintenance and replacement; an installation process hole 102 is provided on the outer end face of the fixed outer sleeve body 101 to facilitate the installation of the fixed outer sleeve 1; the buffer hole 203 on the floating sleeve 2 is easy to process; by controlling the diameter and number of buffer holes 203, the flow rate of oil can be controlled to achieve a suitable buffering effect.

[0018] When the piston rod 9 retracts, the piston 5 moves towards the cylinder bottom 3. When one end of the piston rod 9 enters the inner hole of the floating sleeve 2, the oil flows through the gap between the fixed outer sleeve 1 and the floating sleeve 2, as well as the buffer hole 203 on the floating sleeve 2, to the oil outlet 10 of the cylinder bottom 3 (see the oil flow arrow for details). By controlling the diameter and number of buffer holes 203, the flow rate of the oil can be controlled to achieve a suitable buffering effect.

Claims

1. A floating sleeve combined buffer device suitable for large-diameter hydraulic cylinders, comprising a fixed outer sleeve (1) and a floating sleeve (2), characterized in that: The fixed sleeve (1) is set inside the cylinder bottom (3); the fixed sleeve (1) and the cylinder bottom (3) are connected by threads; the fixed sleeve (1) is provided with a stepped through hole inside; the fixed sleeve (1) is provided with a floating sleeve (2) inside the stepped through hole of the fixed sleeve (1); the floating sleeve (2) is located between the stepped through hole of the fixed sleeve (1) and the cylinder bottom (3); the floating sleeve (2) and the fixed sleeve (1) are clearance fit; a number of buffer holes are provided on the flange at one end of the floating sleeve (2); the buffer holes of the floating sleeve (2) are connected to the oil outlet (10).

2. The floating sleeve combined buffer device suitable for large-diameter hydraulic cylinders according to claim 1, characterized in that: The fixing sleeve (1) includes a fixing sleeve body (101), an installation process hole (102), and an external thread (103); the installation process hole (102) is provided on the outer end face of the fixing sleeve body (101); the external thread (103) is provided on the outer circle of the fixing sleeve body (101).

3. The floating sleeve combined buffer device suitable for large-diameter hydraulic cylinders according to claim 1, characterized in that: The floating sleeve (2) includes a floating sleeve body (201), a flange (202), and a buffer hole (203); a flange (202) is provided at one end of the floating sleeve body (201); and a number of buffer holes (203) are provided on the flange (202).

4. The floating sleeve combined buffer device suitable for large-diameter hydraulic cylinders according to claim 3, characterized in that: The diameter and number of the buffer holes (203) are adapted to the impact force of the hydraulic cylinder.

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