Electro-hydraulic cylinder piston fixing device convenient to disassemble

Abstract

This utility model relates to the field of electro-hydraulic cylinder technology and discloses an easy-to-disassemble electro-hydraulic cylinder piston fixing device, including a piston rod and a piston body. A fixing mechanism is provided between the piston body and the piston rod. The fixing mechanism includes a positioning rod fixedly connected to one side of the piston body. One end of the piston rod has a positioning hole that cooperates with the positioning rod. The surface of the positioning rod has a first external thread, and the inner wall of the positioning hole has a first internal thread that cooperates with the first external thread. By setting up the fixing mechanism, this utility model allows the first external thread and the first internal thread to mesh together by aligning the positioning rod and the positioning hole and rotating the piston body during use. At the same time, the second external thread on the surface of the reinforcing rod will also mesh with the second internal thread on the inner wall of the reinforcing hole. Through the double threaded connection, the stability of the connection is effectively improved, and loosening of the threads is avoided.

Description

Technical Field

[0001] This utility model relates to the field of electro-hydraulic cylinder technology, specifically to an electro-hydraulic cylinder piston fixing device that is easy to disassemble. Background Technology

[0002] Electro-hydraulic cylinders, also known as hydraulic cylinders, are hydraulic actuators that convert hydraulic energy into mechanical energy to perform linear reciprocating motion (or oscillating motion). They are simple in structure and reliable in operation. When used to achieve reciprocating motion, they eliminate the need for a reduction gear and have no transmission backlash, resulting in smooth movement. Therefore, they are widely used in the hydraulic systems of various machines.

[0003] The piston is a component of an electro-hydraulic cylinder, usually mounted on the piston rod. To facilitate disassembly, the piston rod and piston body are generally fixed by internal and external threads. The structure is simple and compact, suitable for general working conditions. However, under high pressure or vibration, the threads are prone to loosening, affecting the normal use of the electro-hydraulic cylinder. Utility Model Content

[0004] The purpose of this invention is to provide an easily disassembled electro-hydraulic cylinder piston fixing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an easily disassembled electro-hydraulic cylinder piston fixing device, comprising a piston rod and a piston body, wherein a fixing mechanism is provided between the piston body and the piston rod; The fixing mechanism includes a positioning rod fixedly connected to one side of the piston body. One end of the piston rod has a positioning hole that cooperates with the positioning rod. The surface of the positioning rod has a first external thread, and the inner wall of the positioning hole has a first internal thread that cooperates with the first external thread. A reinforcing rod is fixedly connected inside the positioning hole. One end of the positioning rod has a reinforcing hole, and the surface of the reinforcing rod has a second external thread. The inner wall of the reinforcing hole has a second internal thread that cooperates with the second external thread. An anti-loosening mechanism is fixedly mounted on the piston rod.

[0006] Preferably, the anti-loosening mechanism includes a housing fixedly connected to the surface of the piston rod, a movable ring slidably connected to the inner wall of the housing, two traction rods fixedly connected to one side of the movable ring, four pins fixedly connected to the other side of the movable ring, and a pin hole for cooperating with the pins is opened on one side of the piston body.

[0007] Preferably, a spring is fitted on the surface of the traction rod, one end of the spring is fixedly connected to the inner wall of the housing, and the other end of the spring is fixedly connected to one side of the moving ring.

[0008] Preferably, the number of pin holes is several, and they are evenly distributed in a ring on one side of the piston body.

[0009] Preferably, a traction ring is provided on one side of the housing, and one end of the traction rod passes through to one side of the housing and is fixedly connected to one side of the traction ring.

[0010] Preferably, a gasket is provided on one side of the piston rod, and a groove for cooperating with the gasket is provided on one side of the piston body.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By setting a fixing mechanism, this utility model can, during use, align the positioning rod and the positioning hole, and rotate the piston body to make the first external thread and the first internal thread mesh together. At the same time, the second external thread on the surface of the reinforcing rod will also mesh with the second internal thread on the inner wall of the reinforcing hole. Through the double thread connection, the stability of the connection is effectively improved and the loosening of the threads is avoided. 2. By setting an anti-loosening mechanism, this utility model can retract the pin into the housing by pulling the traction ring before the fixing mechanism connects the piston rod and the piston body. The traction ring will drive the traction rod, the moving ring and the pin to move. After the fixing mechanism connects the piston body and the piston rod, the traction ring is released. The elastic force generated by the spring will push the moving ring and the pin to reset, so that the pin enters the corresponding pin hole, preventing the threads from loosening and thus improving the stability of the connection. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is an exploded perspective view of the present invention; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This utility model Figure 3 A magnified view of a section at point A in the middle; Figure 5 This is a perspective view of a partial structure of the anti-loosening mechanism in this utility model.

[0013] In the diagram: 1. Piston rod; 2. Piston body; 3. Positioning rod; 4. Positioning hole; 5. First external thread; 6. First internal thread; 7. Reinforcing rod; 8. Reinforcing hole; 9. Second external thread; 10. Second internal thread; 11. Housing; 12. Moving ring; 13. Traction rod; 14. Pin; 15. Pin hole; 16. Spring; 17. Traction ring; 18. Washer; 19. Groove. Detailed Implementation

[0014] 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.

[0015] Please see Figure 1 - Figure 5 As shown, Example 1: An easy-to-disassemble electro-hydraulic cylinder piston fixing device includes a piston rod 1 and a piston body 2, and a fixing mechanism is provided between the piston body 2 and the piston rod 1. The fixing mechanism includes a positioning rod 3 fixedly connected to one side of the piston body 2. One end of the piston rod 1 is provided with a positioning hole 4 that cooperates with the positioning rod 3. The surface of the positioning rod 3 is provided with a first external thread 5. The inner wall of the positioning hole 4 is provided with a first internal thread 6 that cooperates with the first external thread 5. A reinforcing rod 7 is fixedly connected inside the positioning hole 4. One end of the positioning rod 3 is provided with a reinforcing hole 8. The surface of the reinforcing rod 7 is provided with a second external thread 9. The inner wall of the reinforcing hole 8 is provided with a second internal thread 10 that cooperates with the second external thread 9. Anti-loosening mechanism, which is fixedly installed on piston rod 1.

[0016] In this embodiment, considering that the piston body 2 is a component of the electro-hydraulic cylinder, it is generally mounted on the piston rod 1. For easy disassembly, the piston rod 1 and the piston body 2 are generally fixed by internal and external threads. The structure is simple and compact, suitable for general working conditions. However, under high pressure or vibration, the threads are prone to loosening, affecting the normal use of the electro-hydraulic cylinder. Therefore, by setting a fixing mechanism, during use, by aligning the positions of the positioning rod 3 and the positioning hole 4, and rotating the piston body 2, the first external thread 5 and the first internal thread 6 are engaged. At the same time, the second external thread 9 on the surface of the reinforcing rod 7 will also engage with the second internal thread 10 on the inner wall of the reinforcing hole 8. Figure 3 and Figure 4 As shown, the double-threaded connection effectively improves the stability of the connection and prevents the threads from loosening.

[0017] A gasket 18 is provided on one side of the piston rod 1, and a groove 19 that cooperates with the gasket 18 is provided on one side of the piston body 2.

[0018] In this embodiment, by setting the gasket 18 and the groove 19, the stability of the connection between the piston body 2 and the piston rod 1 can be improved, and the probability of loosening can be reduced.

[0019] Example 2: Based on Embodiment 1, the fixing mechanism in this embodiment effectively improves the stability of the connection by using a double threaded connection, avoiding the probability of loosening between the piston body 2 and the piston rod 1. However, loosening can still occur under high pressure and vibration. The anti-loosening mechanism in this application includes a housing 11 fixedly connected to the surface of the piston rod 1. A movable ring 12 is slidably connected to the inner wall of the housing 11. Two traction rods 13 are fixedly connected to one side of the movable ring 12, and four pins 14 are fixedly connected to the other side of the movable ring 12. A pin hole 15 is opened on one side of the piston body 2 to cooperate with the pins 14.

[0020] In this embodiment, by setting an anti-loosening mechanism, before the fixing mechanism connects the piston rod 1 and the piston body 2, the traction ring 17 can be pulled, which will drive the traction rod 13, the moving ring 12 and the pin 14 to move, causing the pin 14 to retract into the housing 11. After the fixing mechanism connects the piston body 2 and the piston rod 1, the traction ring 17 is released, and the elastic force generated by the spring 16 will push the moving ring 12 and the pin 14 to reset, so that the pin 14 enters the corresponding pin hole 15, preventing the threads from loosening, thereby improving the stability of the connection.

[0021] A spring 16 is fitted onto the surface of the traction rod 13. One end of the spring 16 is fixedly connected to the inner wall of the housing 11, and the other end of the spring 16 is fixedly connected to one side of the moving ring 12.

[0022] In this embodiment, by setting a spring 16, when the traction ring 17 is released, the elastic force generated by the spring 16 will push the moving ring 12 and the pin 14 to reset, thus achieving the function of resetting.

[0023] The number of pin holes 15 is several, and they are evenly distributed in a ring on one side of the piston body 2.

[0024] In this embodiment, by setting [the appropriate parameters], it is possible to [achieve this].

[0025] A traction ring 17 is provided on one side of the housing 11, and one end of the traction rod 13 passes through to one side of the housing 11 and is fixedly connected to one side of the traction ring 17.

[0026] In this embodiment, by setting a traction ring 17, it is easy for the user to pull the traction rod 13 and other structures to move, which facilitates driving.

[0027] Working principle: During use, by aligning the positioning rod 3 and the positioning hole 4, rotating the piston body 2 causes the first external thread 5 to engage with the first internal thread 6. Simultaneously, the second external thread 9 on the surface of the reinforcing rod 7 also engages with the second internal thread 10 on the inner wall of the reinforcing hole 8. Figure 3 and Figure 4 As shown, the double-threaded connection effectively improves the stability of the connection and prevents the threads from loosening. Before the fixing mechanism connects the piston rod 1 and the piston body 2, by pulling the traction ring 17, the traction ring 17 will drive the traction rod 13, the moving ring 12 and the pin 14 to move, so that the pin 14 retracts into the housing 11. After the fixing mechanism connects the piston body 2 and the piston rod 1, the traction ring 17 is released, and the elastic force generated by the spring 16 will push the moving ring 12 and the pin 14 to reset, so that the pin 14 enters the corresponding pin hole 15, preventing the threads from loosening, thereby improving the stability of the connection.

[0028] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying 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 limitation, 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 the element.

[0029] 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. An electro-hydraulic cylinder piston fixing device for easy disassembly, comprising a piston rod (1) and a piston body (2), characterized in that: A fixing mechanism is provided between the piston body (2) and the piston rod (1); The fixing mechanism includes a positioning rod (3) fixedly connected to one side of the piston body (2). One end of the piston rod (1) is provided with a positioning hole (4) that cooperates with the positioning rod (3). The surface of the positioning rod (3) is provided with a first external thread (5). The inner wall of the positioning hole (4) is provided with a first internal thread (6) that cooperates with the first external thread (5). A reinforcing rod (7) is fixedly connected inside the positioning hole (4). One end of the positioning rod (3) is provided with a reinforcing hole (8). The surface of the reinforcing rod (7) is provided with a second external thread (9). The inner wall of the reinforcing hole (8) is provided with a second internal thread (10) that cooperates with the second external thread (9). Anti-loosening mechanism, which is fixedly mounted on piston rod (1).

2. The easily removable electro-hydraulic cylinder piston retaining device of claim 1, wherein: The anti-loosening mechanism includes a housing (11) fixedly connected to the surface of the piston rod (1). A movable ring (12) is slidably connected to the inner wall of the housing (11). Two traction rods (13) are fixedly connected to one side of the movable ring (12). Four pins (14) are fixedly connected to the other side of the movable ring (12). A pin hole (15) is provided on one side of the piston body (2) to cooperate with the pins (14).

3. A readily removable electro-hydraulic cylinder piston retaining device according to claim 2, characterised in that: A spring (16) is fitted on the surface of the traction rod (13). One end of the spring (16) is fixedly connected to the inner wall of the housing (11), and the other end of the spring (16) is fixedly connected to one side of the moving ring (12).

4. The easily removable electro-hydraulic cylinder piston retaining device of claim 2, wherein: The number of pin holes (15) is several, and they are evenly distributed in a ring on one side of the piston body (2).

5. The easily removable electro-hydraulic cylinder piston retaining device of claim 2, wherein: A traction ring (17) is provided on one side of the housing (11), and one end of the traction rod (13) passes through to one side of the housing (11) and is fixedly connected to one side of the traction ring (17).

6. The easily removable electro-hydraulic cylinder piston retaining device of claim 1, wherein: A gasket (18) is provided on one side of the piston rod (1), and a groove (19) is provided on one side of the piston body (2) to cooperate with the gasket (18).

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