Hydraulic rotary joint

Abstract

The utility model relates to the technical field of adapters, and provides a hydraulic rotary joint. The hydraulic rotary joint comprises a mounting pipe, a connector and an elastic piece. A plurality of limiting grooves are formed in one end of the mounting pipe, and the multiple limiting grooves are formed in the circumferential direction of the mounting pipe at intervals; the connector is rotationally and slidably connected to the end, close to the limiting grooves, of the mounting pipe, a limiting block is arranged on the peripheral side of the connector, and the limiting block is clamped and limited in one of the limiting grooves; the elastic piece is arranged between the installation pipe and the connector so as to drive the connector to be away from the installation pipe. On the basis, the twisted state of the high-pressure oil pipe can be conveniently changed, so that the high-pressure oil pipe is prevented from being blocked as much as possible.

Description

Technical Field

[0001] The present application relates to the field of adapters, and in particular to a hydraulic rotary joint. Background Art

[0002] Hydraulic joints are components that connect high-pressure oil pipes to hydraulic equipment in hydraulic systems. In related technologies, there is sometimes a relative rotation angle between the high-pressure oil pipe and the hydraulic equipment. Because the hydraulic joints are fixed, the high-pressure oil pipe is prone to twisting, which can easily lead to blockage.

[0003] However, in actual application, it is necessary to disassemble the high-pressure oil pipe and the hydraulic joint in time, and reinstall the high-pressure oil pipe after the high-pressure oil pipe is reset to change the twisted state of the high-pressure oil pipe, so as to avoid blockage of the high-pressure oil pipe as much as possible. The operation is more troublesome and therefore needs to be improved. Utility Model Content

[0004] In order to facilitate changing the twisted state of the high-pressure oil pipe and thus avoid blockage of the high-pressure oil pipe as much as possible, the present application provides a hydraulic rotary joint.

[0005] The hydraulic rotary joint provided in this application adopts the following technical solution:

[0006] A hydraulic rotary joint comprises a mounting tube, a connecting head and an elastic member; a plurality of limit grooves are provided in one end of the mounting tube, and the plurality of limit grooves are arranged at intervals along the circumference of the mounting tube; the connecting head is rotatably and slidably connected to one end of the mounting tube close to the limit groove, and a limit block is provided on the circumference of the connecting head, and the limit block is clamped and limited in one of the limit grooves; the elastic member is provided between the mounting tube and the connecting head to drive the connecting head away from the mounting tube.

[0007] By adopting the above technical solution, in actual application, the mounting tube is fixedly connected to the hydraulic equipment, and the high-pressure oil pipe is fixedly connected to the end of the connector away from the mounting tube. After the high-pressure oil pipe is twisted, the staff presses the connector to move the connector toward the end close to the mounting tube. At this time, the connector squeezes the elastic part, and the limit block disengages from the limit groove. Then the connector is rotated to drive the high-pressure oil pipe to rotate, releasing the pressure on the connector. The elastic part drives the connector away from the mounting tube, so that the limit block is locked and limited in another limit groove, thereby realizing the installation of the high-pressure oil pipe, and the twisted state of the high-pressure oil pipe can be changed. The operation is simple and convenient, and effectively avoids blockage of the high-pressure oil pipe.

[0008] Preferably, an embedding groove is formed at one end of the connector close to the mounting tube, and one end of the elastic member is embedded in the embedding groove.

[0009] By adopting the above technical solution and providing an embedding groove, one end of the elastic member is limited in the embedding groove to support the elastic member, thereby minimizing bending, deformation and damage of the elastic member and improving the service life of the elastic member.

[0010] Preferably, the elastic member is a spring.

[0011] By adopting the above technical solution and setting the elastic member as a spring, the structure is simple and the production cost is low.

[0012] Preferably, the elastic member is an elastic column.

[0013] By adopting the above technical solution and arranging the elastic member as an elastic column, the structure is simple and the production cost is low.

[0014] Preferably, the hydraulic rotary joint further comprises an oil-free bushing, the oil-free bushing is arranged in the mounting tube, and the connecting head is movably arranged in the oil-free bushing.

[0015] By adopting the above technical solution and providing an oil-free bushing, the sliding and rotation of the connector are made easier, thereby further facilitating the change of the twisted state of the high-pressure oil pipe.

[0016] Preferably, the hydraulic rotary joint further includes a plurality of balls, which are disposed in the oil-free bushing and abut against the peripheral side of the connector.

[0017] By adopting the above technical solution, a plurality of balls are provided, and the balls abut against the peripheral side of the connector, so as to improve the stability and smoothness of the sliding and rotating of the connector, and to improve the stability of changing the twisted state of the high-pressure oil pipe.

[0018] Preferably, the hydraulic rotary joint further comprises a sealing ring, which is arranged at one end of the mounting tube close to the limiting groove, and the sealing ring is sleeved on the connector.

[0019] By adopting the above technical solution and providing a sealing ring, the sealing between the installation pipe and the connector is ensured, and the oil is prevented from flowing out from between the installation pipe and the connector as much as possible.

[0020] Preferably, the sealing ring includes an inserting portion and an abutting portion, the inserting portion is inserted into the mounting tube, and the abutting portion is provided at an end of the inserting portion away from the elastic member and abuts against the mounting tube.

[0021] By adopting the above technical solution, by providing the plug-in part and the abutment part, the plug-in part realizes the detachable connection between the sealing ring and the mounting tube, and the abutment part abuts against the mounting tube to ensure the sealing performance of the sealing ring.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. The staff presses the connector to move it toward the end close to the installation pipe. At this time, the connector squeezes the elastic member, and the limit block disengages from the limit groove. Then the connector is rotated to drive the high-pressure oil pipe to rotate, releasing the pressure on the connector. The elastic member drives the connector away from the installation pipe, causing the limit block to engage and be limited in the other limit groove, thus completing the installation of the high-pressure oil pipe. This can change the twisted state of the high-pressure oil pipe. The operation is simple and convenient, effectively avoiding blockage of the high-pressure oil pipe.

[0024] 2. By providing an embedded groove, one end of the elastic member is limited in the embedded groove to support the elastic member, thereby minimizing the bending, deformation and damage of the elastic member and prolonging the service life of the elastic member;

[0025] 3. By setting up oil-free bushings and balls, the sliding and rotation of the connector are made easier, thereby further facilitating the change of the twisted state of the high-pressure oil pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the overall structure of the hydraulic rotary joint in the embodiment of the present application;

[0027] Figure 2 Schematic diagram of the cross-sectional structure of the hydraulic rotary joint in the embodiment of the present application;

[0028] Figure 3 Schematic diagram of the overall structure of the oil-free bushing and ball in the embodiment of the present application;

[0029] Figure 4 It is a schematic diagram of the overall structure of the sealing ring in the embodiment of the present application.

[0030] Figure numerals: 1. Mounting tube; 11. Limiting groove; 12. Mounting groove; 2. Connecting head; 21. Limiting block; 22. Embedded groove; 3. Elastic member; 4. Oil-free bushing; 5. Ball; 6. Sealing ring; 61. Inserting portion; 62. Abutting portion. DETAILED DESCRIPTION

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0032] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] The following is combined with Figure 1-4 This application is described in further detail.

[0034] The embodiment of the present application discloses a hydraulic rotary joint.

[0035] Reference Figure 1 and Figure 2 The hydraulic rotary joint includes a mounting tube 1, a connecting head 2 and an elastic member 3. The mounting tube 1 is hollow and has openings at both ends. A plurality of rectangular limiting grooves 11 are opened in one end of the mounting tube 1. The plurality of limiting grooves 11 are evenly spaced along the circumference of the mounting tube 1.

[0036] The connecting head 2 is coaxially arranged with the mounting tube 1, and the connecting head 2 is movably arranged at one end of the mounting tube 1 close to the limiting groove 11, that is, the connecting head 2 rotates and slides to be connected to the end of the mounting tube 1 close to the limiting groove 11, and the peripheral side of the connecting head 2 protrudes to form a limiting block 21, the shape of the limiting block 21 matches the shape of the limiting groove 11, and the limiting block 21 is snap-engaged and limited in one of the limiting grooves 11.

[0037] The elastic member 3 is disposed between the mounting tube 1 and the connector 2. Specifically, one end of the elastic member 3 elastically abuts against the end of the mounting tube 1 away from the retaining groove 11, and the other end elastically abuts against the connector 2, thereby forcing the connector 2 away from the mounting tube 1, i.e., forcing the connector 2 to move outward. In this embodiment, the elastic member 3 is a spring, which has a simple structure, facilitates installation, and has low production costs. Of course, in other embodiments, the elastic member 3 can also be an elastic column, and this application is not limited thereto.

[0038] In actual use, the end of the mounting tube 1 away from the connector 2 is fixedly connected to the hydraulic equipment, and the high-pressure oil pipe is fixedly connected to the end of the connector 2 away from the mounting tube 1. The high-pressure oil pipe has a certain degree of elasticity. If the outlet of the high-pressure oil pipe becomes twisted, the staff presses the connector 2 to move the connector 2 toward the end closer to the mounting tube 1. At this time, the connector 2 squeezes the elastic member 3, and the limit block 21 disengages the limit groove 11, thereby releasing the rotation limit of the connector 2.

[0039] The staff then rotates the connector 2 to drive the high-pressure oil pipe to rotate, and then releases the pressure on the connector 2, and the elastic member 3 is reset to drive the connector 2 away from the mounting tube 1, so that the limit block 21 is engaged and limited in the other limit groove 11, thereby realizing the reinstallation of the high-pressure oil pipe. In this way, the twisted state of the high-pressure oil pipe can be changed, and the blockage of the high-pressure oil pipe can be effectively avoided. There is no need to install and disassemble the high-pressure oil pipe, and the operation is simple and convenient.

[0040] Reference Figure 2 In some embodiments, an embedding groove 22 is provided at one end of the connector 2 close to the mounting tube 1. The embedding groove 22 is arranged along the circumference of the connector 2, and one end of the elastic member 3 is embedded in the embedding groove 22, so that one end of the elastic member 3 is sleeved in the connector 2, which can support the elastic member 3 and minimize damage caused by excessive bending and deformation of the elastic member 3, thereby improving the service life of the elastic member 3.

[0041] Reference Figure 2 and Figure 3 In some embodiments, the hydraulic rotary joint further comprises an oil-free bushing 4, an inner side wall of the mounting tube 1 is provided with a mounting groove 12 along its circumference, the oil-free bushing 4 is coaxially fixedly connected to the mounting groove 12, and the connector 2 is movably arranged in the oil-free bushing 4, that is, the connector 2 rotates and slides in connection with the oil-free bushing 4, so as to reduce the friction of the rotation and sliding of the connector 2, making the sliding and rotation of the connector 2 easier, thereby further facilitating the change of the twisted state of the high-pressure oil pipe.

[0042] In some embodiments, the hydraulic rotary joint also includes a plurality of balls 5, and the plurality of balls 5 are evenly arranged in the oil-free bushing 4. Specifically, the plurality of balls 5 are rollingly installed on the inner wall of the oil-free bushing 4, and each ball 5 abuts against the peripheral side of the connector 2. Under the action of the plurality of balls 5, the friction force of the rotation and sliding of the connector 2 can be further reduced, so as to improve the stability and smoothness of the sliding and rotation of the connector 2, so as to improve the stability of changing the twisted state of the high-pressure oil pipe.

[0043] Reference Figure 2 and Figure 4 In some embodiments, the hydraulic rotary joint further includes a sealing ring 6, which is installed at one end of the mounting tube 1 close to the limiting groove 11, and the sealing ring 6 is sleeved on the connector 2 to ensure the sealing between the mounting tube 1 and the connector 2, and to prevent the oil from flowing out from between the mounting tube 1 and the connector 2 as much as possible.

[0044] In some embodiments, the sealing ring 6 includes a plug-in portion 61 and an abutment portion 62. The sealing ring 6 is made of rubber material. The plug-in portion 61 is elastically inserted into the end of the mounting tube 1 near the limiting groove 11 to achieve a detachable connection between the sealing ring 6 and the mounting tube 1, facilitating subsequent replacement of the sealing ring 6. The abutment portion 62 is integrally connected to the end of the plug-in portion 61 away from the elastic member 3. The diameter of the abutment portion 62 is larger than the diameter of the plug-in portion 61, and the abutment portion 62 tightly abuts the end of the mounting tube 1 to ensure the sealing performance of the sealing ring 6, thereby ensuring that oil is difficult to flow out from between the mounting tube 1 and the connector 2.

[0045] The working principle of this embodiment is as follows: In actual use, the end of the mounting tube 1 away from the connector 2 is fixedly connected to the hydraulic equipment, and the high-pressure oil pipe is fixedly connected to the end of the connector 2 away from the mounting tube 1. The high-pressure oil pipe has a certain degree of elasticity. If the outlet of the high-pressure oil pipe becomes twisted, the staff presses the connector 2, causing it to move toward the end closer to the mounting tube 1. At this time, the connector 2 squeezes the elastic member 3, and the limit block 21 disengages the limit groove 11, thereby releasing the rotation limit of the connector 2.

[0046] The staff then rotates the connector 2 to drive the high-pressure oil pipe to rotate, and then releases the pressure on the connector 2, and the elastic member 3 is reset to drive the connector 2 away from the installation tube 1, so that the limit block 21 is engaged and limited in the other limit groove 11, thereby realizing the installation of the high-pressure oil pipe. In this way, the twisted state of the high-pressure oil pipe can be changed, and the blockage of the high-pressure oil pipe can be effectively avoided. There is no need to install and disassemble the high-pressure oil pipe, and the operation is simple and convenient.

[0047] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A hydraulic rotary joint, characterized in that: The invention comprises a mounting tube (1), a connecting head (2) and an elastic member (3); a plurality of limiting grooves (11) are provided in one end of the mounting tube (1), and the plurality of limiting grooves (11) are arranged at intervals along the circumference of the mounting tube (1); the connecting head (2) is rotatably and slidably connected to one end of the mounting tube (1) close to the limiting groove (11), and a limiting block (21) is provided on the circumferential side of the connecting head (2), and the limiting block (21) is engaged and limited in one of the limiting grooves (11); the elastic member (3) is provided between the mounting tube (1) and the connecting head (2) to drive the connecting head (2) away from the mounting tube (1).

2. A hydraulic rotary joint according to claim 1, characterized in that: An embedding groove (22) is provided at one end of the connector (2) close to the mounting tube (1), and one end of the elastic member (3) is embedded in the embedding groove (22).

3. A hydraulic rotary joint according to claim 1 or 2, characterized in that: The elastic member (3) is a spring.

4. A hydraulic rotary joint according to claim 1 or 2, characterized in that: The elastic member (3) is an elastic column.

5. The hydraulic rotary joint according to claim 1, characterized in that: The hydraulic rotary joint further comprises an oil-free bushing (4), the oil-free bushing (4) being arranged in the mounting pipe (1), and the connecting head (2) being movably arranged in the oil-free bushing (4).

6. The hydraulic rotary joint according to claim 5, characterized in that: The hydraulic rotary joint further comprises a plurality of balls (5), wherein the plurality of balls (5) are arranged in the oil-free bushing (4) and abut against the peripheral side of the connecting head (2).

7. The hydraulic rotary joint according to claim 1, characterized in that: The hydraulic rotary joint further comprises a sealing ring (6), wherein the sealing ring (6) is arranged at one end of the mounting pipe (1) close to the limiting groove (11), and the sealing ring (6) is sleeved on the connector (2).

8. The hydraulic rotary joint according to claim 7, characterized in that: The sealing ring (6) comprises an inserting portion (61) and an abutting portion (62), wherein the inserting portion (61) is inserted into the mounting tube (1), and the abutting portion (62) is provided at an end of the inserting portion (61) away from the elastic member (3) and abuts against the mounting tube (1).

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