A connecting pin dismounting tool
By designing disassembly fixtures for the retaining and ejecting parts, the problems of difficult disassembly and easy damage of the connecting pins were solved, achieving a stable and efficient disassembly process and reducing maintenance costs and safety hazards.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING SHOUGANG CO LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-06-26
AI Technical Summary
In existing technologies, connecting pins are difficult to disassemble, easily damaged, leading to scratches on the sealing surface, oil leaks, and fire hazards. Furthermore, maintenance efficiency is low and costs are high.
A disassembly fixture including a retaining component and an ejector component was designed. The retaining component is sleeved on the connecting pin and extends into the sealing groove. The ejector component moves axially to push the connecting pin to separate from the mounting base, thereby achieving stable disassembly.
It enables stable disassembly of the connecting pins, avoids structural damage, improves disassembly and assembly efficiency and safety, and reduces maintenance costs.
Smart Images
Figure CN224406884U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of hydraulic equipment disassembly and assembly technology, and in particular to a disassembly tool for a connecting pin. Background Technology
[0002] Hydraulic systems are increasingly widely used in industry, with steel mills employing a large number of them in their hot rolling processes. To improve the response speed of hydraulic systems, high-precision, high-frequency, large hydraulic cylinders are typically integrated with hydraulic valve blocks. To ensure the installation accuracy of the oil ports between the hydraulic valve blocks and reduce installation difficulty, connecting pins are generally installed in the middle of the oil ports of large hydraulic valve blocks. During maintenance such as hydraulic cylinder replacement, it is necessary to frequently disassemble the hydraulic valve blocks and hydraulic cylinders. Due to the high precision of the hydraulic valve blocks, the interference fit between the connecting pins, hydraulic valve blocks, hydraulic cylinders, and seals, and the large amount of hydraulic oil used, disassembling the connecting pins is difficult. Improper operation can easily cause scratches on the sealing surfaces, deformation of the connecting pins, and other damage such as oil leaks. If oil splashes onto the strip steel, it can also cause a fire, posing a significant safety hazard.
[0003] Normally, disassembling the connecting pin involves removing the connecting bolts between the hydraulic valve block and the hydraulic cylinder. After lifting it out, the connecting pin is left on the hydraulic cylinder or hydraulic valve block. Then, the connecting pin exposed on the outside is gently tapped with a hammer to slowly remove it from the connecting pin hole. During the disassembly process, the connecting pin is easily deformed, the sealing surface is damaged, and oil leakage accidents occur. In particular, leakage of the connecting pin seal in the high-pressure AGC system of the finishing mill can cause oil to splash onto the hot-rolled strip, which can easily cause a fire. Moreover, the connecting pin is difficult to disassemble, the workload of maintenance personnel is large, and the replacement efficiency is low. The connecting pin is a high-precision part and is generally a repair part. The fit with the connecting pin hole is also very precise. Once damaged, replacement is difficult and costly. In severe cases, the valve block or hydraulic cylinder may need to be replaced together. Utility Model Content
[0004] In view of the deficiencies in the prior art, this application provides a disassembly tool for connecting pins to solve the problem that connecting pins are difficult to disassemble and reassemble repeatedly and are easily damaged in the prior art.
[0005] The above-mentioned objectives of this application are mainly achieved through the following technical solutions:
[0006] A disassembly tool for a connecting pin, the disassembly tool comprising:
[0007] A retaining member is provided, which is used to be sleeved on the connecting pin, and the retaining member is provided with a retaining ring. When the retaining member is sleeved on the connecting pin, the retaining ring can extend into the sealing groove on the outer peripheral surface of the connecting pin.
[0008] An ejector is movably mounted on the retaining member, and one end of the ejector can reciprocate along the axial direction of the connecting pin. When the ejector moves toward the mounting base of the connecting pin, the ejector can push the connecting pin to separate from the mounting base after contacting the mounting base.
[0009] In an optional embodiment, the retaining member includes a plurality of retaining portions, and the plurality of retaining portions are provided with connecting portions. The connecting portions can be sequentially and fixedly connected to the retaining portions so that the retaining portions form a detachable ring.
[0010] In an optional embodiment, the connecting portion includes positioning portions fixed to the retaining portion and locking bolts threadedly connected to the adjacent positioning portions.
[0011] In an optional embodiment, the retaining ring includes multiple retaining segments, which are respectively fixed on multiple retaining portions.
[0012] In an optional embodiment, the ejector includes a plurality of ejector portions spaced apart on the retainer.
[0013] In an optional implementation, each of the ejector portions has the same length and displacement stroke.
[0014] In an optional embodiment, a protective pad is provided at the end of the ejector portion.
[0015] In an optional embodiment, the plurality of ejector portions are each independently connected to the retaining member.
[0016] In an optional embodiment, the ejector portion is a tightening bolt threadedly connected to the retaining member.
[0017] In an optional embodiment, a plurality of the ejector portions are symmetrically arranged on the retaining member.
[0018] Compared with the prior art, the advantages of this application are:
[0019] The disassembly fixture in this application includes a retaining component and an ejector component. The retaining component is used to fit onto the connecting pin, and the retaining component is provided with a retaining ring. When the retaining component is fitted onto the connecting pin, the retaining ring can extend into the sealing groove on the outer circumferential surface of the connecting pin. The ejector component is movably mounted on the retaining component, and one end of the ejector component can reciprocate along the axial direction of the connecting pin. When the ejector component moves towards the mounting base of the connecting pin, the ejector component can push the connecting pin to separate from the mounting base after contacting the mounting base. In actual operation, after the hydraulic valve block is removed, the connecting pin and the hydraulic cylinder maintain a stable connection in their original state. The sealing ring between the hydraulic cylinders is exposed, and the sealing groove on the outer circumference of the connecting pin is exposed. The retaining ring is fitted onto the connecting pin and extends into the sealing groove of the connecting pin. At this time, the retaining member maintains relative stability with the connecting pin in the axial position through the retaining ring, and the ejector is operated to move. One end of the ejector is pushed against the mounting base of the connecting pin along the axial direction of the connecting groove, that is, against the hydraulic cylinder. As the ejector continues to push out, it pushes the ejector and the connecting pin away from the hydraulic cylinder in the opposite direction to disassemble until the connecting pin is separated from the hydraulic cylinder. The entire disassembly process does not damage the basic structure of the connecting pin. The displacement speed of the connecting pin is easy to control, which facilitates repeated disassembly and assembly of the connecting pin and improves the stability and efficiency of the operation. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 A top view of the disassembly fixture is provided for an embodiment of this application;
[0022] Figure 2 This application provides a schematic diagram of the installation status of the connecting pins in an embodiment.
[0023] Figure 3 This application provides a structural diagram illustrating the disassembly of the connecting pin in an embodiment of the present application.
[0024] In the figure: 100, clamping component; 101, clamping part; 102, connecting part; 103, positioning part; 104, locking bolt; 105, clamping ring; 106, clamping section; 200, ejector; 201, ejection part; 300, connecting pin; 301, sealing groove; 401, hydraulic cylinder; 402, hydraulic valve block. Detailed Implementation
[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is intended to aid in understanding the present invention, but does not constitute a limitation thereof. The specific structural and functional details disclosed herein are only for describing exemplary embodiments of the present invention. However, the present invention may be embodied in many alternative forms and should not be construed as being limited to the embodiments described herein.
[0026] like Figure 1 , Figure 3 As shown, Figure 1 A top view of the disassembly fixture is provided for an embodiment of this application. Figure 3 This application provides a structural schematic diagram of the connecting pin 300 during disassembly; a disassembly fixture for the connecting pin 300, the fixture including a retaining member 100 and an ejector member 200, wherein:
[0027] The retaining member 100 is used to be sleeved on the connecting pin 300, and the retaining member 100 is provided with a retaining ring 105. When the retaining member 100 is sleeved on the connecting pin 300, the retaining ring 105 can extend into the sealing groove 301 on the outer peripheral surface of the connecting pin 300. The specifications of the retaining ring 105 match the sealing groove 301. Correspondingly, the retaining ring 105 is fixedly connected to the retaining member 100 and forms a synchronous displacement relationship with the retaining member 100. Through corresponding operations, the retaining member 100 can be sleeved on the connecting pin 300, and the retaining ring 105 is reliably extended into the sealing groove 301 on the connecting pin 300. The retaining ring 105 keeps the retaining member 100 and the connecting pin 300 moving synchronously, and the sealing groove 301 on the connecting pin 300 is pre-opened and does not require further operation.
[0028] The ejector 200 is movably mounted on the retaining member 100, and one end of the ejector 200 can reciprocate along the axial direction of the connecting pin 300. When the ejector 200 moves toward the mounting base of the connecting pin 300, the ejector 200 can push the connecting pin 300 to separate from the mounting base after contacting the mounting base.
[0029] like Figure 2 As shown, Figure 2 A schematic diagram of the installation state of the connecting pin 300 is provided for the embodiments of this application. It should be noted that the installation base of the connecting pin 300 is the connecting part 102 on one end of the connecting pin 300. After the two ends of the connecting pin 300 are connected to a component, after removing one component, the other component serves as the installation base, and the connecting pin 300 is removed using the installation base, which is convenient and efficient.
[0030] In actual operation, the hydraulic cylinder 401 is configured as the mounting base, and the hydraulic valve block 402 is configured as the connecting part 102 connected to the other end of the connecting pin 300.
[0031] In an optional embodiment, the working principle of the disassembly fixture in this application is as follows: The disassembly fixture includes a retaining member 100 and an ejector member 200. The retaining member 100 is used to be sleeved on the connecting pin 300, and the retaining member 100 is provided with a retaining ring 105. When the retaining member 100 is sleeved on the connecting pin 300, the retaining ring 105 can extend into the sealing groove 301 on the outer peripheral surface of the connecting pin 300. The ejector member 200 is movably disposed on the retaining member 100, and one end of the ejector member 200 can reciprocate along the axial direction of the connecting pin 300. When the ejector member 200 moves toward the mounting base of the connecting pin 300, the ejector member 200 can push the connecting pin 300 to separate from the mounting base after contacting the mounting base. In actual operation, after the hydraulic valve block 402 is removed, the connecting pin 300 and the hydraulic cylinder 401 maintain a stable connection in their original state. Remove the sealing ring between the connecting pin 300 and the hydraulic cylinder 401, exposing the sealing groove 301 on the outer circumference of the connecting pin 300. Place the retaining ring 105 on the connecting pin 300, extending it into the sealing groove 301. At this point, the retaining member 100 maintains relative stability with the connecting pin 300 in the axial position through the retaining ring 105. Operate the ejector 200 to displace it. One end of the ejector 200 is axially mounted on the mounting base of the connecting pin 300, i.e., on the hydraulic cylinder 401. As the ejector 200 continues to eject, it pushes the ejector 200 and the connecting pin 300 away from the hydraulic cylinder 401, disassembling them until the connecting pin 300 separates from the hydraulic cylinder 401. The entire disassembly process does not damage the basic structure of the connecting pin 300. The displacement speed of the connecting pin 300 is easy to control, facilitating repeated disassembly and assembly of the connecting pin 300, thus improving operational stability and efficiency.
[0032] like Figure 1 , Figure 3 As shown, in an optional embodiment, the retaining member 100 includes a plurality of retaining portions 101, and the plurality of retaining portions 101 are provided with connecting portions 102. The connecting portions 102 can be sequentially fixedly connected to the retaining portions 101 so that the retaining portions 101 form a detachable ring.
[0033] When actually putting on and removing the clamping part 100, the operation can be carried out quickly by combining and putting on multiple clamping parts 101 and disassembling and removing them. When multiple clamping parts 101 are combined and put on the connecting pin 300, the clamping parts 101 are fixed together by the connecting part 102 so that the clamping parts 101 remain relatively stable during the operation, and the clamping ring 105 also maintains a stable constraint relationship with the sealing groove 301.
[0034] like Figure 1 , Figure 3 As shown, in an optional embodiment, the connecting part 102 includes a positioning part 103 fixed to the holding part 101, and a locking bolt 104 threadedly connected to the adjacent positioning part 103.
[0035] The threaded connection and locking between the positioning part 103 and the locking bolt 104 enable the clamping parts 101 to be quickly connected or separated, and the connection strength between the positioning parts 103 on different clamping parts 101 can be controlled by adjusting the thread.
[0036] like Figure 1 , Figure 3 As shown, in an optional embodiment, the retaining ring 105 includes multiple retaining segments 106, which are respectively fixed on multiple retaining parts 101. The corresponding retaining ring 105 is configured as multiple retaining segments 106, and the retaining segments 106 are respectively fixed on the retaining parts 101 to facilitate the simultaneous assembly and disassembly of the retaining parts 101. In actual configuration, the retaining parts 101 can be integrally set with the retaining segments 106.
[0037] In an optional embodiment, the ejector 200 includes a plurality of ejector portions 201 spaced apart on the retainer 100. The spaced arrangement of the plurality of ejector portions 201 allows the connecting pin 300 to be removed more evenly and stably, thereby improving stability.
[0038] like Figure 1 , Figure 3 As shown, in an optional embodiment, each of the ejector portions 201 has the same length and displacement stroke, ensuring that each ejector portion 201 can extend within the same displacement stroke during ejection operations, thus avoiding unnecessary detachment and instability.
[0039] like Figure 1 , Figure 3 As shown, in an optional embodiment, the end of the ejector portion 201 is provided with a protective pad to protect the integrity of the mounting base of the connecting pin 300 and to prevent damage to the mounting base caused by the ejector portion 201 ejection operation.
[0040] like Figure 1 , Figure 3As shown, in an optional embodiment, the plurality of ejector portions 201 are independently connected to the retaining member 100, and the ejector portions 201 operate independently, so that the connecting pin 300 can adaptively adjust the removal direction and axial calibration during the dismantling process, thereby improving the accuracy of the operation.
[0041] like Figure 1 , Figure 3 As shown, in an optional embodiment, the ejector 201 is a tightening bolt threadedly connected to the retaining member 100, and the rotation operation is easy to control and the dismantling rhythm is controlled.
[0042] like Figure 1 , Figure 3 As shown, in an optional embodiment, a plurality of the ejector portions 201 are symmetrically arranged on the retaining member 100, which further enables the connecting pin 300 to be removed more evenly and stably, thereby improving stability.
[0043] It should be understood that the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Although the terms "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit, without departing from the scope of the exemplary embodiments of this utility model.
[0044] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.
[0045] It should be understood that in the description of this utility model, the terms "upper," "vertical," "inner," "outer," etc., indicate the orientation or positional relationship when the disclosed product is used, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0046] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0047] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the present invention. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” “containing,” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, and do not exclude the presence or addition of one or more other features, quantities, steps, operations, units, components, and / or combinations thereof.
[0048] Specific details are provided in the following description to provide a complete understanding of the exemplary embodiments. However, those skilled in the art will understand that the exemplary embodiments can be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may be omitted in the depiction of non-essential details to avoid obscuring the exemplary embodiments.
[0049] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.
[0050] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art.
Claims
1. A tooling for disassembling a connecting pin, characterized in that, The disassembly fixture includes: A retaining member is provided, which is used to be sleeved on the connecting pin, and the retaining member is provided with a retaining ring. When the retaining member is sleeved on the connecting pin, the retaining ring can extend into the sealing groove on the outer peripheral surface of the connecting pin. An ejector is movably mounted on the retaining member, and one end of the ejector can reciprocate along the axial direction of the connecting pin. When the ejector moves toward the mounting base of the connecting pin, the ejector can push the connecting pin to separate from the mounting base after contacting the mounting base.
2. The disassembly fixture for the connecting pin as described in claim 1, characterized in that: The retaining member includes multiple retaining parts, and each retaining part is provided with a connecting part. The connecting parts can be sequentially and fixedly connected to the retaining parts so that the retaining parts form a detachable ring.
3. The disassembly fixture for the connecting pin as described in claim 2, characterized in that: The connecting part includes positioning parts fixed to the holding part and locking bolts threadedly connected to the adjacent positioning parts.
4. The disassembly fixture for the connecting pin as described in claim 2, characterized in that: The retaining ring includes multiple retaining segments, which are respectively fixed on multiple retaining parts.
5. The disassembly fixture for the connecting pin as described in claim 1, characterized in that: The ejector includes multiple ejector portions spaced apart on the retaining member.
6. The disassembly fixture for the connecting pin as described in claim 5, characterized in that: Each of the aforementioned ejector sections has the same length and displacement stroke.
7. The disassembly fixture for the connecting pin as described in claim 5, characterized in that: The end of the ejector portion is provided with a protective pad.
8. The disassembly fixture for the connecting pin as described in claim 5, characterized in that: Each of the aforementioned ejector portions is independently connected to the retaining member.
9. The disassembly fixture for the connecting pin as described in claim 5, characterized in that: The ejector portion is a tightening bolt that is threadedly connected to the retaining member.
10. The disassembly fixture for the connecting pin as described in claim 5, characterized in that: Multiple ejector portions are symmetrically arranged on the retaining member.