Hydraulic coupler dismounting device

Abstract

The utility model discloses a hydraulic coupler dismounting device which comprises a sleeve, a top pipe and a pull rod, a first flange is arranged at one end of the sleeve, an insertion section is arranged at the end, located on the first flange, of the sleeve, a first screwing part is arranged at the other end of the sleeve, internal threads are arranged on the inner wall of the sleeve, and first external threads are arranged on the outer wall of the top pipe. A limiting sleeve is fixedly installed in the jacking pipe, a limiting groove is formed in the end, close to the second screwing part, of the limiting sleeve, the pull rod is located in the jacking pipe and slidably penetrates through the limiting sleeve, a limiting part is fixedly arranged on the side, close to the second screwing part, of the limiting sleeve, and a screwing section is arranged at the end, close to the inserting section, of the pull rod. The hydraulic coupler is dismounted and mounted through screw-thread fit, and in the dismounting and mounting process of a maintainer, the maintainer can sense the magnitude of force conveniently, so that internal threads of the coupler are not prone to being damaged by pulling. The device is more compact in structure, the coupler can be disassembled and assembled by one device, and the device is also convenient to store.

Description

Technical Field

[0001] This utility model relates to the technical field of hydraulic coupler disassembly and assembly tools, and in particular to a hydraulic coupler disassembly and assembly device. Background Technology

[0002] Currently, when our maintenance personnel disassemble the hydraulic coupler, they use a U-shaped hollow tube screwed into the inner hole of the hydraulic coupler, place a solid round steel of appropriate length on the motor shaft, and then use a jack to push it outwards. The hydraulic coupler is slowly moved out. Since the motor shaft is 200mm long, it cannot be pulled out in one go. Only after finding a round steel of appropriate length that is longer than the first one to replace it and then using a jack to push it outwards again can the hydraulic coupler be removed. This process is repeated many times. Furthermore, since the force of the jack cannot be judged by the naked eye, it is very easy to damage the internal threads of the coupler.

[0003] The reinstallation of the hydraulic coupler involves using a wall or other stable object to fix the motor in place. A solid round steel bar is placed at the front end of the coupler, and then a jack is used to apply pressure to the solid round steel bar towards the motor, so that the coupler is slowly installed onto the motor shaft. This installation method causes great damage to the motor bearings, and the concentricity is difficult to control.

[0004] The above assembly method was a last resort. In order to prevent damage to the internal teeth of the coupler and to prevent damage to the motor bearings, our company's technicians have applied for a hydraulic coupler disassembly and assembly device.

[0005] A search revealed Chinese patent document CN217434204U, published on September 16, 2022, which discloses a special tool for disassembling and assembling a hydraulic coupler. The tool includes a first motor body, a first motor shaft connected to one side of the first motor body, a first coupler fixedly sleeved on the outer wall of the first motor shaft, a second motor body at the bottom of the first motor body, and a second motor shaft connected to one side of the second motor body. Its advantages include: rapid and reliable disassembly and installation of hydraulic couplings, solving the problem of time-consuming and labor-intensive disassembly and installation, reducing the number of workers to two. It also features simple structure, low cost, convenient operation, reliable performance, and time and labor savings. Only two people are needed to operate simultaneously, reducing disassembly time to 20 minutes and installation time to 20 minutes, significantly reducing maintenance labor intensity, saving time, and improving work efficiency. Its disadvantages are: firstly, the use of a hydraulic puller during coupling disassembly carries the risk of damaging the coupling's internal threads; secondly, this tool consists of multiple individual parts, with different parts required for disassembly and installation, making it difficult to store. Losing even one part will prevent disassembly or installation operations. Utility Model Content

[0006] The purpose of this invention is to provide a hydraulic coupler disassembly and assembly device. This device utilizes threaded connections to disassemble and install the hydraulic coupler. During disassembly and installation, maintenance personnel can sense the magnitude of the force, thus preventing damage to the coupler's internal threads. Furthermore, this device has a more compact structure; a single unit can achieve both disassembly and installation of the coupler, and it is also easier to store.

[0007] To achieve the above objectives, this utility model provides a hydraulic coupler assembly / disassembly device, including a sleeve, a top tube, and a pull rod. One end of the sleeve is provided with a first flange, and the end of the sleeve located at the first flange is provided with an insertion section. The outer circumference of the insertion section is provided with a second external thread. The other end of the sleeve is provided with a first turning part, and the inner wall of the sleeve is provided with an internal thread. The outer wall of the top tube is provided with a first external thread. The top tube is threadedly screwed into the sleeve. Both ends of the top tube extend out of the sleeve. The end of the top tube located on the side of the first turning part is provided with a second turning part. A limiting sleeve is fixedly installed inside the top tube. The end of the limiting sleeve near the second turning part is provided with a limiting groove. The pull rod is located inside the top tube and slides through the limiting sleeve. A limiting part is fixed on the pull rod on the side of the limiting sleeve near the second turning part. When the limiting part is inserted into the limiting groove, it limits the pull rod to the top tube. The end of the pull rod near the insertion section is provided with a screw-in section.

[0008] It also includes a first thrust bearing and a retaining ring, which are used to be installed onto the insertion section when installing the hydraulic coupler.

[0009] The other end of the jacking pipe is provided with a second flange.

[0010] The jacking pipe is also provided with an extension section at the end of the second flange; it also includes a second thrust bearing and a cover; the second thrust bearing is used to be installed on the extension section when the hydraulic coupler is disassembled, and the cover is used to be installed on the screw-on section when the hydraulic coupler is disassembled, with the cover abutting against the second thrust bearing.

[0011] The cover includes a baffle and an internal threaded sleeve. The internal threaded sleeve is fixed on one side of the baffle and is threadedly engaged with the screw-in section and can be inserted into the top pipe. The baffle abuts against the second thrust bearing.

[0012] The second screwing part is a sleeve with a polygonal structure that is installed and fixed on the top pipe.

[0013] The top pipe is provided with a connection hole, which is connected and fixed to the limiting sleeve through a connection structure.

[0014] The connection structure is either a screw or welding.

[0015] Compared with the prior art, this utility model has the following technical effects:

[0016] 1. The insertion section of this utility model is used for threaded installation into the inner hole of one end of the coupler. The first flange is used to abut against the end of the inner hole of the coupler. The first screwing part is used to rotate or limit the sleeve by means of a tool. The jacking pipe is threadedly installed in the sleeve. The second screwing part is used to rotate the jacking pipe by means of a tool. Rotating the sleeve or jacking pipe causes the sleeve or jacking pipe to move axially. The limiting groove at the end of the limiting sleeve is used to insert the limiting part. When the limiting part is inserted into the limiting groove, it limits the pull rod and the jacking pipe, preventing the pull rod from rotating. The screw-on section is used to screw into the center threaded hole of the motor shaft when installing the coupler. Using threaded engagement to disassemble and install the hydraulic coupler makes it easier for maintenance personnel to perceive the force during disassembly and installation, thus reducing the risk of damaging the internal threads of the coupler. The structure of this device is more compact, and a single device can realize the disassembly and installation of the coupler, which is also convenient for storage.

[0017] 2. This utility model also includes a first thrust bearing and a retaining ring. When installing the coupler, the retaining ring abuts against the coupler, and the first thrust bearing is located between the retaining ring and the first flange. The first thrust bearing reduces the friction of the sleeve during rotation, making the rotating sleeve more flexible.

[0018] 3. The jacking pipe of this utility model is also provided with an extension section at the end of the second flange. When the coupler is disassembled and the jacking pipe is rotated, the cover at the end of the jacking pipe contacts the motor shaft. Since a second thrust bearing is installed between the cover and the second flange, the cover does not rotate, but the jacking pipe rotates, making the rotation of the jacking pipe more flexible. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0020] Figure 1 This is a cross-sectional view of the sleeve, the first thrust bearing, and the retaining ring in this utility model.

[0021] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure at point AA.

[0022] Figure 3 This is a cross-sectional structural diagram of the jacking pipe, tie rod, second thrust bearing, and cover in this utility model.

[0023] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure at point BB.

[0024] Figure 5 for Figure 3 Schematic diagram of the cross-sectional structure at point CC.

[0025] Figure 6 for Figure 3 Schematic diagram of the cross-sectional structure at point DD.

[0026] Figure 7 This is a diagram showing the state of the coupler during disassembly of this utility model.

[0027] Figure 8 This is a diagram showing the state when the coupler of this utility model is installed.

[0028] Figure label:

[0029] Sleeve 10, insertion section 11, first turning part 12, internal thread 13, first flange 14, clearance section 15, sliding section 16;

[0030] Top pipe 20, first external thread 21, second flange 22, extension section 23, sliding part 24, second turning part 25, limiting sleeve 26, limiting groove 261, connecting hole 27;

[0031] Pull rod 30, screw joint section 31, limiting part 32;

[0032] Second thrust bearing 40;

[0033] 50, baffle 51, internal threaded sleeve 52;

[0034] First thrust bearing 60;

[0035] 70mm retaining ring. Detailed Implementation

[0036] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0037] Example 1:

[0038] Please see Figure 1-8A hydraulic coupler assembly / disassembly device includes a sleeve 10, a top tube 20, and a pull rod 30. One end of the sleeve 10 has a first flange 14, and an insertion section 11 is located at the end of the sleeve 10 near the first flange 14. The outer circumference of the insertion section 11 has a second external thread. The other end of the sleeve 10 has a first tightening part 12. The inner wall of the sleeve 10 has an internal thread 13, and the outer wall of the top tube 20 has a first external thread 21. The top tube 20 is threadedly screwed into the sleeve 10, with both ends of the top tube 20 extending out of the sleeve 10. A second turning part 25 is provided at one end of the first turning part 12. A limiting sleeve 26 is fixedly installed inside the jacking pipe 20. A limiting groove 261 is provided at one end of the limiting sleeve 26 near the second turning part 25. The pull rod 30 is located inside the jacking pipe 20 and slides through the limiting sleeve 26. A limiting part 32 is fixed on the pull rod 30 on the side of the limiting sleeve 26 near the second turning part 25. When the limiting part 32 is inserted into the limiting groove 261, it limits the pull rod 30 to the jacking pipe 20. A screw-in section 31 is provided at one end of the pull rod 30 near the insertion section 11.

[0039] The insertion section 11 is threaded into the inner hole of one end of the coupler. The first flange 14 abuts against the end of the inner hole of the coupler. The first turning part 12 is used to rotate or limit the sleeve 10 by means of a tool. The jacking tube 20 is threadedly installed inside the sleeve 10. The second turning part 25 is used to rotate the jacking tube 20 by means of a tool. Rotating the sleeve 10 or the jacking tube 20 causes axial movement of the sleeve 10 or the jacking tube 20. The limiting groove 261 at the end of the limiting sleeve 26 is used to insert the limiting part 32. When the limiting part 32 is inserted into the limiting groove 261, it limits the pull rod 30 and the jacking tube 20, preventing the pull rod 30 from rotating. The screw-in section 31 is used to screw into the center threaded hole of the motor shaft when installing the coupler.

[0040] The aforementioned structure allows for the disassembly and installation of the hydraulic coupler using threaded connections. During disassembly and installation, maintenance personnel can sense the force applied, thus preventing damage to the coupler's internal threads. Furthermore, this device is more compact, enabling coupler disassembly and installation with a single unit, and also facilitates storage.

[0041] Specifically, when disassembling the coupler, see [link to relevant documentation]. Figure 7Referring to the attached diagram in CN217434204U, first screw the insertion section 11 of the sleeve 10 onto the inner hole of one end of the coupler, with the first flange 14 abutting against the end of the inner hole of the coupler. By rotating the second turning part 25 of the jacking tube 20 with a tool, the jacking tube 20 rotates towards the coupler and extends towards the motor shaft. Since the sleeve 10 is screwed and fixed to the coupler, the sleeve 10 does not rotate. When rotating the jacking tube 20, the end of the jacking tube 20 contacts the motor shaft. As the jacking tube 20 continues to rotate, it pushes the motor shaft out of the coupler. During this process, the pull rod 30 is not under force. When the front end of the pull rod 30, i.e., the left end, abuts against the end face of the motor shaft, the limiting part 32 is located outside the limiting groove 261.

[0042] When installing the coupler, see [link / reference]. Figure 8 A washer ring is fitted onto one side of the insertion section 11 on the jacking tube 20. The jacking tube 20 is then passed through the coupler, and the pull rod 30 is pushed to the left. The relative positions of the jacking tube 20 and the pull rod 30 are adjusted so that the limiting part 32 enters the limiting groove 261. At this time, the screw-on section 31 of the pull rod 30 extends. While stabilizing the pull rod 30, the jacking tube 20 is rotated to screw the screw-on section 31 into the center threaded hole of the motor shaft. Then, the sleeve 10 is rotated, and the sleeve 10 moves to the left. The end of the insertion section 11 abuts against the washer ring, and the washer ring abuts against the coupler. As the sleeve 10 rotates, the reaction force installs one end of the coupler onto the motor shaft. During this process, the jacking tube 20 and the pull rod 30 will not move axially or rotate radially.

[0043] See Figure 3 , 4 In this embodiment, the limiting groove 261 is a hexagonal groove. See also Figure 5 The limiting part 32 is a hexagonal structure adapted to the limiting groove 261. The limiting part 32 is a tubular structure and is fitted and welded onto the tie rod 30.

[0044] See Figure 1 To facilitate machining, the inner bore of the sleeve 10 has a clearance section 15, with the internal thread 13 and a sliding section 16 located at opposite ends of the clearance section 15. See also Figure 3 The jacking pipe 20 is provided with a sliding part 24 at the position corresponding to the sliding section 16.

[0045] Example 2:

[0046] Based on Embodiment 1, it also includes a first thrust bearing 60 and a retaining ring 70, see [link to Embodiment 1]. Figure 1 , 8 The first thrust bearing 60 and the retaining ring 70 are used to be installed onto the insertion section 11 when installing the hydraulic coupler.

[0047] When installing the coupler, the retaining ring 70 abuts against the coupler, and the first thrust bearing 60 is located between the retaining ring 70 and the first flange 14. The first thrust bearing 60 reduces the friction of the sleeve 10 during rotation, making the rotating sleeve 10 more flexible.

[0048] Example 3:

[0049] Based on Example 1 or Example 2, see Figure 3 The other end of the jacking pipe 20 is provided with a second flange 22. The second flange 22 is provided to increase the contact area with the motor shaft.

[0050] Furthermore, the jacking pipe 20 is provided with an extension section 23 at the end of the second flange 22; it also includes a second thrust bearing 40 and a cover 50. See also Figure 7 The second thrust bearing 40 is used to be installed on the extension section 23 when the hydraulic coupler is disassembled, and the cover 50 is used to be installed on the rotating section 31 when the hydraulic coupler is disassembled, with the cover 50 abutting against the second thrust bearing 40.

[0051] When the coupler is disassembled and the jacking pipe 20 is rotated, the end cap 50 of the jacking pipe 20 contacts the motor shaft. Since the end cap 50 and the second flange 22 are equipped with a second thrust bearing 40, the end cap 50 does not rotate, but the jacking pipe 20 rotates, making the rotation of the jacking pipe 20 more flexible.

[0052] In this embodiment, the cover 50 includes a baffle 51 and an internally threaded sleeve 52. The internally threaded sleeve 52 is fixed to one side of the baffle 51 and is threadedly engaged with the screw-in section 31, and can be inserted into the top tube 20. The baffle 51 abuts against the second thrust bearing 40. Since the thrust bearing is easily disassembled, installing the cover 50 on the tie rod 30 also serves to stabilize the thrust bearing.

[0053] To improve the structural strength of the second turning part 25 and prevent deformation of the second turning part 25, see [reference needed]. Figure 3 , 6 The second rotating part 25 is a sleeve with a hexagonal structure that is installed and fixed on the top pipe 20.

[0054] For easy connection and fixation between the limiting sleeve 26 and the jacking pipe 20, see [link / reference] Figure 3 , 7 The jacking pipe 20 is provided with a connecting hole 27, which is connected and fixed to the limiting sleeve 26 through a connecting structure.

[0055] Specifically, the connection structure is either screws or welding.

[0056] The working principle or operation process of this utility model is as follows:

[0057] When disassembling the coupler, see [link / reference]. Figure 7First, the second thrust bearing 40 is fitted onto the extension section 23, and the cover 50 is installed onto the screw-on section 31, with the cover 50 abutting against the second thrust bearing 40. The insertion section 11 of the sleeve 10 is screwed onto the inner hole at one end of the coupler, with the first flange 14 abutting against the end of the inner hole of the coupler. By rotating the second turning part 25 of the jacking tube 20 with a tool, the jacking tube 20 rotates towards the coupler side and extends towards the motor shaft side. Since the sleeve 10 is screwed and fixed to the coupler, the sleeve 10 does not rotate. When the jacking tube 20 is rotated, the cover 50 at the end of the jacking tube 20 contacts the motor shaft. As the jacking tube 20 continues to rotate, it pushes the motor shaft out of the coupler. During this process, the pull rod 30 is not under force. When the front end of the pull rod 30, that is, the left end, abuts against the end face of the motor shaft, the limiting part 32 is located outside the limiting groove 261.

[0058] When installing the coupler, see [link / reference]. Figure 8 Disassemble the second thrust bearing 40 and the cover 50, then install the first thrust bearing 60 and the retaining ring 70 onto the insertion section 11. Pass the jacking tube 20 through the coupler, push the pull rod 30 to the left, and adjust the relative position of the jacking tube 20 and the pull rod 30 so that the limiting part 32 enters the limiting groove 261. At this time, the screw-on section 31 of the pull rod 30 extends out. While stabilizing the pull rod 30, rotate the jacking tube 20 to screw the screw-on section 31 into the center threaded hole of the motor shaft. Then rotate the sleeve 10, and the sleeve 10 moves to the left. The retaining ring 70 at the end of the insertion section 11 abuts against the coupler. As the sleeve 10 rotates, one end of the coupler is installed onto the motor shaft. During this process, the limiting part 32 is located in the limiting groove 261, and the jacking tube 20 and the pull rod 30 will not move axially or rotate radially.

Claims

1. A hydraulic coupling disassembly device, characterized by: The device includes a sleeve (10), a top tube (20), and a pull rod (30). One end of the sleeve (10) is provided with a first flange (14). An insertion section (11) is provided at the end of the sleeve (10) located at the first flange (14). A second external thread is provided on the outer circumference of the insertion section (11). A first screwing part (12) is provided at the other end of the sleeve (10). An internal thread (13) is provided on the inner wall of the sleeve (10). A first external thread (21) is provided on the outer wall of the top tube (20). The top tube (20) is threadedly screwed into the sleeve (10). Both ends of the top tube (20) extend out of the sleeve (10). The top tube (20) is located at the first screwing part. (12) A second turning part (25) is provided at one end of the pipe. A limiting sleeve (26) is fixedly installed inside the pipe (20). A limiting groove (261) is provided at one end of the limiting sleeve (26) near the second turning part (25). The pull rod (30) is located inside the pipe (20). The pull rod (30) slides through the limiting sleeve (26). A limiting part (32) is fixed on the pull rod (30) on the side of the limiting sleeve (26) near the second turning part (25). When the limiting part (32) is inserted into the limiting groove (261), the pull rod (30) is limited to the pipe (20). A screw section (31) is provided at one end of the pull rod (30) near the insertion section (11).

2. A hydraulic coupling dismounting device according to claim 1, characterized in that: It also includes a first thrust bearing (60) and a retaining ring (70), which are used to be installed onto the insertion section (11) when installing the hydraulic coupler.

3. The hydraulic coupler disassembly and assembly device according to claim 1, characterized in that: The other end of the jacking pipe (20) is provided with a second flange (22).

4. A hydraulic coupling dismounting device according to claim 3, characterized in that: The jacking pipe (20) is also provided with an extension section (23) at the end of the second flange (22); it also includes a second thrust bearing (40) and a cover (50); the second thrust bearing (40) is used to be installed on the extension section (23) when the hydraulic coupler is disassembled, and the cover (50) is used to be installed on the screw-on section (31) when the hydraulic coupler is disassembled, and the cover (50) abuts against the second thrust bearing (40).

5. A hydraulic coupling dismounting device according to claim 4, characterized in that: The cover (50) includes a baffle (51) and an internal threaded sleeve (52). The internal threaded sleeve (52) is fixed on one side of the baffle (51). The internal threaded sleeve (52) is threadedly engaged with the screw-in section (31) and can be inserted into the top tube (20). The baffle (51) abuts against the second thrust bearing (40).

6. The hydraulic coupling disassembly device of claim 1, wherein: The second twisting part (25) is a sleeve with a polygonal structure that is installed and fixed on the top pipe (20).

7. The hydraulic coupling disassembly device of claim 1, wherein: The top pipe (20) is provided with a connection hole (27), which is connected and fixed to the limiting sleeve (26) through a connection structure.

8. A hydraulic coupling dismounting device according to claim 7, characterized in that: The connection structure is a screw or welding.

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