Five-way rotary joint

Abstract

The utility model relates to an engineering machinery matching device, in particular to a five-way rotary joint which comprises a rotary sleeve and a rotary core inserted in the rotary sleeve, five first oil ways are arranged in the rotary sleeve, and five second oil ways corresponding to the first oil ways are arranged on the rotary core. The rotating core comprises a core body and a head main body, bearings are clamped to the front end and the rear end of the core body, and the core body is inserted into the rotating sleeve through the bearings; five pressure relief holes in one-to-one correspondence with the first oil ways are formed in the side wall of the rotary sleeve, and plugs are arranged in the pressure relief holes. According to the utility model, multiple oil ways can be provided, the rotary operation is stable, meanwhile, a certain self-protection function is realized, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to a matching device for engineering machinery, in particular to a five-way rotary joint. Background Art

[0002] The swivel joint is an indispensable supporting device in the hydraulic system of construction machinery. With the development of construction machinery, construction machinery needs to achieve more fine movements and greater torque. In order to achieve the above functions, it requires more oil circuits and stable rotation of the swivel joint. In order to achieve more oil circuits, the existing solution is to add more swivel joints. However, this solution will increase the overall size of the equipment. At the same time, users often overload the equipment during daily operation, which makes the existing swivel joints prone to damage.

[0003] Therefore, there is an urgent need for a new type of rotary joint, which can provide multiple oil circuits, rotate smoothly, and has a certain self-protection function to extend the service life of the equipment. Utility Model Content

[0004] The utility model provides a five-way rotary joint, which can provide multiple oil circuits, rotates smoothly, and has a certain self-protection function, thereby extending the service life of the equipment.

[0005] The utility model adopts the following technical solutions:

[0006] A five-way rotary joint comprises a rotary sleeve and a rotary core inserted inside, wherein the rotary sleeve is provided with five first oil circuits inside, and the rotary core is provided with five second oil circuits corresponding to the first oil circuits; the rotary core comprises a core body and a head body, the front and rear ends of the core body are both clamped with bearings, and the core body is inserted inside the rotary sleeve through the bearings; five pressure relief holes corresponding to the first oil circuits are opened on the side wall of the rotary sleeve, and plugs are provided in the pressure relief holes.

[0007] In order to improve the firmness of the bearing installation at the bottom of the core body, a pressure plate is connected to the bottom of the rotating core by bolts, and the diameter of the pressure plate is larger than the inner diameter of the bearing at the bottom of the core body.

[0008] The first oil circuit includes a first oil port opened on the bottom surface of the rotating sleeve and a first oil passage opened in an L-shape inside the rotating sleeve; the pressure relief hole is opened on the side wall of the rotating sleeve and is connected to the first oil passage. The second oil circuit includes a second oil passage opened in the rotating core in the longitudinal direction, a second oil port opened in the side wall of the rotating core in the transverse direction and connected to the second oil passage, and a third oil port opened in the head body and connected to the second oil passage; the third oil port includes two located at the top of the head body, two located on one side wall of the head body, and one located on the other side wall of the head body opposite to the head body.

[0009] A flange is sleeved at the connection between the core body and the head body, and the flange is fixedly arranged on the top of the rotating sleeve.

[0010] From the above description of the structure of the utility model, it can be seen that compared with the prior art, the utility model has the following advantages: 1. The utility model is provided with five oil circuits, which can meet the hydraulic needs of various actions of engineering machinery, while reducing the volume of the hydraulic device to meet the needs of equipment design; 2. The utility model is provided with a bearing connection between the rotating core and the rotating sleeve to ensure the stable and smooth rotation of the rotating core, which meets the stable operation of engineering machinery to achieve various actions; 3. The utility model is provided with a pressure relief hole, when the pressure is too large and exceeds the design range, the pressure is relieved, so that the equipment has a certain self-protection function and the service life of the equipment is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A three-dimensional diagram of the utility model Figure 1 ;

[0012] Figure 2 A three-dimensional diagram of the utility model Figure 2 ;

[0013] Figure 3 A three-dimensional diagram of the utility model Figure 3 ;

[0014] Figure 4 This is a three-dimensional schematic diagram of the utility model Figure 1 ;

[0015] Figure 5 This is a three-dimensional schematic diagram of the utility model Figure 2 ;

[0016] Figure 6 This is a three-dimensional schematic diagram of the utility model Figure 3 ;

[0017] Figure 7 This is a three-dimensional schematic diagram of the utility model Figure 4 ;

[0018] Figure 8 This is a three-dimensional schematic diagram of the utility model Figure 5 ;

[0019] Fig. 9 This is a three-dimensional schematic diagram of the utility model Figure 6 ;

[0020] Fig.10 This is a three-dimensional schematic diagram of the utility model Figure 7 ;

[0021] Fig.11 This is a three-dimensional schematic diagram of the utility model Figure 8 ;

[0022] Fig.12 This is a three-dimensional schematic diagram of the utility model Fig. 9 ;

[0023] Fig.13 This is a schematic diagram of the explosion frame line of the utility model;

[0024] Fig.14 This is an explosion diagram of the utility model;

[0025] Explanation of the accompanying drawings: rotating sleeve 1, first oil circuit 11, first oil port 111, first oil channel 112, rotating core 2, second oil circuit 21, second oil channel 211, second oil port 212, third oil port 213, core body 3, head body 4, bearing 5, pressure relief hole 6, plug 61, pressure plate 7, flange 8. DETAILED DESCRIPTION

[0026] The specific implementation of the present utility model is described below with reference to the accompanying drawings.

[0027] See also Figures 1 to 14 A five-way rotary joint includes a rotary sleeve 1 and a rotary core 2 inserted inside, wherein the rotary sleeve 1 is provided with five first oil passages 11, and the rotary core 2 is provided with five second oil passages 21 corresponding to the first oil passages 11; the rotary core 2 includes a core body 3 and a head body 4, and the front and rear ends of the core body 3 are both clamped with bearings 5, and the core body 3 is inserted inside the rotary sleeve 1 through the bearings 5; the side wall of the rotary sleeve 1 is provided with five pressure relief holes 6 corresponding to the first oil passages 11, and a plug 61 is provided inside the pressure relief hole 6. In order to improve the firmness of the installation of the bearing 5 at the bottom of the core body 3, a pressure plate 7 is connected to the bottom of the rotary core 2 by bolts, and the diameter of the pressure plate 7 is larger than the inner diameter of the bearing 5 at the bottom of the core body 3.

[0028] See also Figures 1 to 14 The first oil circuit 11 includes a first oil port 111 opened on the bottom surface of the rotating sleeve 1 and a first oil passage 112 opened in an L-shape inside the rotating sleeve 1; the pressure relief hole 6 is opened on the side wall of the rotating sleeve 1 and is connected with the first oil passage 112. The second oil circuit 21 includes a second oil passage 211 opened in the rotating core 2 in the longitudinal direction, a second oil port 212 opened in the side wall of the rotating core 2 in the transverse direction and connected with the second oil passage 211, and a third oil port 213 opened in the head body 4 and connected with the second oil passage 211; the third oil port 213 includes two located at the top of the head body 4, two located on one side wall of the head body 4, and one located on the other side wall of the head body 4; a flange 8 is sleeved at the connection between the core body 3 and the head body 4, and the flange 8 is fixedly arranged on the top of the rotating sleeve 1

[0029] Working principle: The utility model realizes the power demand of large flow of hydraulic system and meets the movement and torque requirements of engineering machinery by designing five oil circuits. At the same time, by designing a bearing 5 between the rotating core 2 and the rotating sleeve 1 for connection, the stable and smooth operation of the rotating core 2 is ensured, and the stability of the operation of the engineering machinery is improved. In addition, by opening a pressure relief hole 6 corresponding to the first oil circuit 11 on the rotating sleeve 1, when the user operates beyond the rated requirements, the pressure is relieved through the pressure relief hole 6 to avoid damage to the equipment due to excessive oil pressure, thereby realizing a certain self-protection function and reducing the maintenance cost of the equipment.

[0030] The above is only a specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. A five-way rotary joint, comprising a rotary sleeve and a rotary core inserted inside, characterized in that: Five first oil circuits are arranged inside the rotating sleeve, and five second oil circuits corresponding to the first oil circuits are arranged on the rotating core; the rotating core comprises a core body and a head body, and the front and rear ends of the core body are both clamped with bearings, and the core body is inserted into the rotating sleeve through the bearings; five pressure relief holes corresponding to the first oil circuits are opened on the side wall of the rotating sleeve, and plugs are arranged in the pressure relief holes.

2. A five-way rotary joint according to claim 1, characterized in that: The bottom of the rotating core is connected with a pressing plate by bolts, and the diameter of the pressing plate is larger than the inner diameter of the bearing located at the bottom of the core body.

3. A five-way rotary joint according to claim 1 or 2, characterized in that: The first oil circuit includes a first oil port opened on the bottom surface of the rotating sleeve and a first oil passage opened in an L-shape inside the rotating sleeve; the pressure relief hole is opened on the side wall of the rotating sleeve and is connected with the first oil passage.

4. A five-way rotary joint according to claim 1 or 2, characterized in that: The second oil circuit includes a second oil passage opened in the longitudinal direction inside the rotating core, a second oil port opened in the transverse direction on the side wall of the rotating core and connected to the second oil passage, and a third oil port opened in the head body and connected to the second oil passage.

5. A five-way rotary joint according to claim 3, characterized in that: The second oil circuit includes a second oil passage opened in the longitudinal direction inside the rotating core, a second oil port opened in the transverse direction on the side wall of the rotating core and connected to the second oil passage, and a third oil port opened in the head body and connected to the second oil passage.

6. A five-way rotary joint according to claim 1 or 5, characterized in that: A flange is sleeved at the connection between the core and the head body, and the flange is fixedly arranged on the top of the rotating sleeve.

7. A five-way rotary joint according to claim 5, characterized in that: The third oil ports include two located at the top of the head body, two located at one side wall of the head body, and one located at the other side wall of the head body.

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