Electro-hydraulic control device of hydraulic wrench

Abstract

The utility model discloses an electrohydraulic control device of a hydraulic wrench, which comprises an electrohydraulic control device body, the lower end of the electrohydraulic control device body is fixedly communicated with a connecting pipe, the inner wall of the connecting pipe is provided with a thread groove, and the inner wall of the thread groove is in threaded connection with a rotating nut. The hydraulic wrench body drives the first oil inlet pipe to be inserted into the connecting pipe, the first oil inlet pipe is attached to the oil outlet pipe, the rotating nut is twisted, so that one side of the outer side wall of the rotating nut rotates in the threaded groove, and when the rotating nut moves by a certain distance in the threaded groove, the inner wall of the rotating nut is attached to one side of the metal spring piece; the first oil inlet pipe is arranged on the hydraulic wrench body and is pressed by the rotating nut in the follow-up rotating process, so that the multiple metal spring pieces are close to one another, the first oil inlet pipe is fixed, the electro-hydraulic control device body is installed on the hydraulic wrench body, the structure is simple, operation is convenient, and the installation and disassembly efficiency of the electro-hydraulic control device body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electro-hydraulic control equipment for hydraulic wrenches, and specifically relates to an electro-hydraulic control device for a hydraulic wrench. Background Technique

[0002] A hydraulic wrench is a hydraulic tool for bolts. Through the action of a hydraulic system, it realizes the tightening or loosening of bolts. When in use, an electro-hydraulic control device is required to achieve precise control of the oil pressure and flow rate in the hydraulic system, so as to ensure that the hydraulic wrench can output precise torque when tightening or loosening bolts. The electro-hydraulic control device is usually installed inside the main body of the hydraulic wrench and on the handle or side of the hydraulic wrench.

[0003] At present, for the electro-hydraulic control devices of most hydraulic wrenches, the output port of the electro-hydraulic control device is connected to the liquid inlet of the hydraulic wrench, and a special connection structure is required to prevent oil leakage between the two. After long-term use, the electro-hydraulic control device may be damaged and needs to be disassembled from the hydraulic wrench. During the disassembly process, the connection structure may be lost, and the installation is time-consuming and laborious, thus being inconvenient to use. Content of the Utility Model

[0004] The purpose of the utility model is to provide an electro-hydraulic control device for a hydraulic wrench to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An electro-hydraulic control device for a hydraulic wrench, including the electro-hydraulic control device body. A connecting pipe is fixedly communicated with the lower end of the electro-hydraulic control device body. A thread groove is provided on the inner wall of the connecting pipe, and a rotating nut is threadedly connected to the inner wall of the thread groove. An installation groove one is provided on the other side of the inner wall of the connecting pipe, and an installation ring is fixedly connected to the inner wall of the installation groove one. A plurality of metal spring pieces are fixedly connected to the lower end of the installation ring. One side of the outer side walls of the plurality of metal spring pieces is slidably connected to one side of the rotating nut. A hydraulic wrench body is provided below the electro-hydraulic control device body, and an oil inlet pipe one is fixedly communicated with one side of the hydraulic wrench body. The oil inlet pipe one is located inside the connecting pipe.

[0006] As a further preference of this technical solution, an oil outlet pipe is fixedly connected to the inner wall of the connecting pipe, and a plurality of sealing rings are fixedly connected to one end of the oil outlet pipe. A plurality of sealing grooves are provided at one end of the oil inlet pipe one, and the inner walls of the plurality of sealing grooves are respectively clamped with the outer side walls of the plurality of sealing rings.

[0007] As a further preference of the technical solution, one side of the electro-hydraulic control device body is fixedly communicated with an installation pipe. One side of the outer side wall of the installation pipe is provided with a plurality of second installation grooves. The inner walls of the plurality of second installation grooves are fixedly connected with installation plates. The inner walls of the plurality of installation plates are slidably connected with sliding rods. A second return spring is sleeved on the outer side wall of each of the plurality of sliding rods. The inner wall of the installation pipe is slidably connected with a second oil inlet pipe. One end of the sliding rod is clamped with the outer side wall of the second oil inlet pipe.

[0008] As a further preference of the technical solution, a first return spring is sleeved on the outer side wall of the installation pipe. A disassembly ring is slidably connected to the outer side wall of the installation pipe. The first return spring is located inside the disassembly ring.

[0009] As a further preference of the technical solution, a sliding groove is provided on one side of the installation pipe. The inner wall of the sliding groove is slidably connected with one side of the disassembly ring.

[0010] The utility model provides an electro-hydraulic control device for a hydraulic wrench, which has the following beneficial effects:

[0011] In the utility model, the first oil inlet pipe driven on the hydraulic wrench body is inserted into the connecting pipe. The first oil inlet pipe is attached to the oil outlet pipe. The rotating nut is twisted, so that one side of the outer side wall of the rotating nut rotates in the thread groove. When the rotating nut moves a certain distance in the thread groove, the inner wall of the rotating nut is attached to one side of the metal spring piece, and is pressed by the rotating nut during the subsequent rotation process, so that the plurality of metal spring pieces approach each other, thereby fixing the first oil inlet pipe, and realizing the installation of the electro-hydraulic control device body on the hydraulic wrench body. This structure is simple and convenient to operate, and improves the installation and disassembly efficiency of the electro-hydraulic control device body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a three-dimensional structural schematic diagram of the utility model;

[0013] Figure 2 is a partial exploded structural schematic diagram of the electro-hydraulic control device body in the utility model;

[0014] Figure 3 is a partial sectional exploded structural schematic diagram of the electro-hydraulic control device body in the utility model;

[0015] Figure 4 is Figure 3 a partial enlarged schematic diagram of area A in

[0016] Figure 5 is Figure 3 a partial enlarged schematic diagram of area B in

[0017] In the figure: 1. Electro-hydraulic control device body; 2. Rotating nut; 3. First oil inlet pipe; 4. Connecting pipe; 5. Installation ring; 6. Metal spring piece; 7. Oil outlet pipe; 8. First installation groove; 9. Thread groove; 10. Hydraulic wrench body; 11. Second oil inlet pipe; 12. Installation pipe; 13. Dismantling ring; 14. Sealing groove; 15. First reset spring; 16. Sealing ring; 17. Installation plate; 18. Second installation groove; 19. Sliding rod; 20. Second reset spring; 21. Sliding groove. Specific implementation manner

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] The technical solution provided by the present invention is as follows: As Figure 1 - Figure 5 shown, in this embodiment, an electro-hydraulic control device of a hydraulic wrench includes an electro-hydraulic control device body 1. The lower end of the electro-hydraulic control device body 1 is fixedly communicated with a connecting pipe 4. The inner wall of the connecting pipe 4 is provided with a thread groove 9. The inner wall of the thread groove 9 is threadedly connected with a rotating nut 2. The other side of the inner wall of the connecting pipe 4 is provided with a first installation groove 8. The inner wall of the first installation groove 8 is fixedly connected with an installation ring 5. The lower end of the installation ring 5 is fixedly connected with a plurality of metal spring pieces 6. One side of the outer side walls of the plurality of metal spring pieces 6 is slidably connected with one side of the rotating nut 2. A hydraulic wrench body 10 is arranged below the electro-hydraulic control device body 1. One side of the hydraulic wrench body 10 is fixedly communicated with a first oil inlet pipe 3. The first oil inlet pipe 3 is located inside the connecting pipe 4. By inserting the first oil inlet pipe 3 driven by the hydraulic wrench body 10 into the connecting pipe 4, the first oil inlet pipe 3 is attached to the oil outlet pipe 7. Twist the rotating nut 2 to make one side of the outer side wall of the rotating nut 2 rotate in the thread groove 9. When the rotating nut 2 moves a certain distance in the thread groove 9, the inner wall of the rotating nut 2 is attached to one side of the metal spring pieces 6 and is pressed by the rotating nut 2 during subsequent rotation, causing the plurality of metal spring pieces 6 to approach each other, thereby fixing the first oil inlet pipe 3 and realizing the installation of the electro-hydraulic control device body 1 on the hydraulic wrench body 10. This structure is simple and easy to operate, improving the installation and disassembly efficiency of the electro-hydraulic control device body 1. Among them, two oil inlets and oil outlets are installed on the electro-hydraulic control device body 1, so as to realize the pushing of the oil cylinder in the hydraulic wrench body 10.

[0020] As Figure 2 and Figure 3As shown in the figure, an oil outlet pipe 7 is fixedly connected to the inner wall of the connecting pipe 4. One end of the oil outlet pipe 7 is fixedly connected with a plurality of sealing rings 16. A plurality of sealing grooves 14 are formed at one end of the first oil inlet pipe 3. The inner walls of the plurality of sealing grooves 14 are respectively clamped with the outer side walls of the plurality of sealing rings 16. Through the structural design of the sealing groove 14 and the sealing ring 16, the connection position between the oil outlet pipe 7 and the first oil inlet pipe 3 can be sealed in a labyrinth manner, improving the sealing performance and preventing oil leakage.

[0021] As Figure 1 - Figure 5 As shown in the figure, one side of the electro-hydraulic control device body 1 is fixedly communicated with an installation pipe 12. A plurality of second installation grooves 18 are formed on one side of the outer side wall of the installation pipe 12. The inner walls of the plurality of second installation grooves 18 are fixedly connected with installation plates 17. A sliding rod 19 is slidably connected to the inner walls of the plurality of installation plates 17. A second return spring 20 is sleeved on the outer side walls of the plurality of sliding rods 19. An oil inlet pipe 11 is slidably connected to the inner wall of the installation pipe 12. One end of the outer side wall of the oil inlet pipe 11 is clamped with one end of the sliding rod 19. By pressing down the sliding rod 19, one end of the sliding rod 19 is clamped on the outer side wall of the oil inlet pipe 11, and the oil inlet pipe 11 is fixed in the installation pipe 12.

[0022] As Figure 3 and Figure 5 As shown in the figure, a first return spring 15 is sleeved on the outer side wall of the installation pipe 12. A disassembly ring 13 is slidably connected to the outer side wall of the installation pipe 12. The first return spring 15 is located inside the disassembly ring 13. Through the structural design of the first return spring 15, the disassembly ring 13 can limit the sliding rod 19 to prevent the sliding rod 19 from sliding out of the second installation groove 18.

[0023] As Figure 5 As shown in the figure, a sliding groove 21 is formed on one side of the installation pipe 12. The inner wall of the sliding groove 21 is slidably connected with one side of the disassembly ring 13. The disassembly ring 13 can be fixedly installed on the disassembly ring 13 through the sliding groove 21.

[0024] The present utility model provides an electro-hydraulic control device for a hydraulic wrench, and the specific working principle is as follows:

[0025] When the electro-hydraulic control device of the hydraulic wrench has been used for a long time and is severely damaged and needs to be replaced, first turn the rotating nut 2 so that the outer side wall of the rotating nut 2 rotates in the thread groove 9. When the rotating nut 2 moves a certain distance in the thread groove 9, the rotating nut 2 is separated from the metal spring piece 6, releasing the restriction of the metal spring piece 6. The elastic force of the metal spring piece 6 itself will separate each metal spring piece 6, releasing the restriction of the first oil inlet pipe 3, so that the electro-hydraulic control device body 1 can be removed from the hydraulic wrench body 10, and the first oil inlet pipe 3 can be inserted into the new connecting pipe 4. Then turn the rotating nut 2 in the reverse direction so that the outer side wall of the rotating nut 2 rotates in the thread groove 9. When the rotating nut 2 moves a certain distance in the thread groove 9, the inner wall of the rotating nut 2 fits against one side of the metal spring piece 6 and is subjected to the pressure of the rotating nut 2 during subsequent rotation, causing the multiple metal spring pieces 6 to approach each other, thereby fixing the first oil inlet pipe 3, and thus the installation is completed.

[0026] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electro-hydraulic control device for a hydraulic wrench, comprising an electro-hydraulic control device body (1), characterized in that: The lower end of the electro-hydraulic control device body (1) is fixedly connected to a connecting pipe (4), the inner wall of the connecting pipe (4) is provided with a threaded groove (9), the inner wall of the threaded groove (9) is threadedly connected to a rotating nut (2), the other side of the inner wall of the connecting pipe (4) is provided with a mounting groove (8), the inner wall of the mounting groove (8) is fixedly connected to a mounting ring (5), the lower end of the mounting ring (5) is fixedly connected to a plurality of metal spring sheets (6), one side of the outer side walls of the plurality of metal spring sheets (6) are all slidably connected to one side of the rotating nut (2), a hydraulic wrench body (10) is arranged below the electro-hydraulic control device body (1), one side of the hydraulic wrench body (10) is fixedly connected to an oil inlet pipe (3), and the oil inlet pipe (3) is located inside the connecting pipe (4).

2. The electro-hydraulic control device for a hydraulic wrench according to claim 1, characterized in that: The inner wall of the connecting pipe (4) is fixedly connected to an oil outlet pipe (7), one end of the oil outlet pipe (7) is fixedly connected to a plurality of sealing rings (16), one end of the oil inlet pipe (3) is provided with a plurality of sealing grooves (14), the inner walls of the plurality of sealing grooves (14) are respectively clamped with the outer side walls of the plurality of sealing rings (16).

3. The electro-hydraulic control device for a hydraulic wrench according to claim 1, characterized in that: One side of the electro-hydraulic control device body (1) is fixedly connected to a mounting tube (12), and one side of the outer wall of the mounting tube (12) is provided with a plurality of mounting grooves (18), the inner walls of the plurality of mounting grooves (18) are fixedly connected to mounting plates (17), the inner walls of the plurality of mounting plates (17) are slidably connected to sliding rods (19), the outer walls of the plurality of sliding rods (19) are sleeved with return springs (20), the inner wall of the mounting tube (12) is slidably connected to an oil inlet pipe (11), and the outer wall of the oil inlet pipe (11) is clamped with one end of the sliding rod (19).

4. The electro-hydraulic control device for a hydraulic wrench according to claim 3, characterized in that: The outer wall of the mounting tube (12) is sleeved with a return spring (15), and the outer wall of the mounting tube (12) is slidably connected with a disassembly ring (13), and the return spring (15) is located inside the disassembly ring (13).

5. The electro-hydraulic control device for a hydraulic wrench according to claim 4, characterized in that: A sliding groove (21) is provided on one side of the installation tube (12), and the inner wall of the sliding groove (21) is slidably connected to one side of the disassembly ring (13).

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