Rotary hydraulic connector

Abstract

The utility model discloses a rotary hydraulic connector which comprises a flange connecting plate, a central shaft block and an outer cylinder shaft sleeve. The flange connecting plate is fixed at one end of the central shaft block; the outer cylinder shaft sleeve is rotatably arranged on the outer side of the central shaft block in a sleeving manner; an annular groove channel is formed in the outer side of the central shaft block and / or the inner side of the outer cylinder shaft sleeve; the central shaft block is provided with an axial hole channel extending in the axial direction. A first hydraulic connecting port and a second hydraulic connecting port are respectively formed in the side directions of the central shaft block and the outer cylinder shaft sleeve; and a rotating bearing is arranged between the central shaft block and the outer cylinder shaft sleeve. The hydraulic power transmission and high-load-bearing supporting device effectively solves the core problems of hydraulic power transmission and high-load-bearing supporting of rotating components in equipment such as forklift clamps and the like, realizes reliable, continuous and multi-channel supply of a hydraulic oil way in a 360-degree rotating state, and meanwhile has excellent load bearing capacity and structural stability; and the working efficiency, the safety and the service life of the equipment are obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic valve block technology, and in particular to a rotary hydraulic connector. Background Technology

[0002] As the core control unit of a hydraulic system, the hydraulic valve block undertakes the critical tasks of connecting hydraulic pipelines, distributing oil circuits, and controlling the movement of actuators (such as hydraulic cylinders). In traditional hydraulic systems, the valve block is usually designed to be fixedly installed and connected to the actuators through rigid pipelines or hoses to achieve basic control over the opening and closing of unidirectional or multidirectional oil circuits, as well as flow and pressure.

[0003] However, in forklift clamping devices requiring complex actions, such as forklift grippers, the functional requirements are often more complex. In addition to the conventional extension and retraction of the gripper (driven by a telescopic hydraulic cylinder) or the translation of the gripper arm, many applications (such as rotary forklifting, angle adjustment, and material flipping) require the gripper base or the entire gripper module to perform continuous or intermittent rotational movements around its axis. This rotational operation poses a significant challenge to the connection of the hydraulic system, thus necessitating the development of a rotary hydraulic connector applicable to forklift grippers and similar equipment. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a rotary hydraulic connector.

[0005] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: a rotary hydraulic connector, including: a flange connecting plate, a central shaft block and an outer cylinder bushing;

[0006] The flange connecting plate is fixed to one end of the central shaft block; the outer cylinder bushing is rotatably sleeved on the outside of the central shaft block; the outer side of the central shaft block and / or the inner side of the outer cylinder bushing are provided with an annular groove; the central shaft block is provided with an axially extending axial channel; the central shaft block and the outer cylinder bushing are respectively provided with a first hydraulic connection port and a second hydraulic connection port on their sides.

[0007] The lower part of the axial channel is connected to the first hydraulic connection port, and the upper part is connected to the annular channel; the second hydraulic connection port is connected to the annular channel; a rotary bearing is provided between the central shaft block and the outer cylinder bushing.

[0008] Optionally, the rotary bearing is provided in two sets, respectively located at both ends of the outer sleeve.

[0009] Optionally, the outer wall of the central shaft block is provided with two outer ring platforms; the inner wall of the outer cylinder bushing is provided with two inner ring platforms; the two outer ring platforms correspond to the two inner ring platforms, and the two sets of rotary bearings are respectively embedded between the two sets of outer ring platforms and inner ring platforms.

[0010] Optionally, sealing rings are embedded on the upper and lower sides of the annular groove along the axial direction of the central shaft block.

[0011] Optionally, several annular channels are spaced apart along the axial direction of the central shaft block; the first hydraulic connection port, the second hydraulic connection port, and the axial channel are arranged in several groups corresponding to the several annular channels.

[0012] Optionally, several of the axial channels are arranged at uniform intervals along the circumference of the central shaft block.

[0013] Optionally, the axial channel extends below to the end face of the central shaft block; a port plug is provided below the axial channel.

[0014] Optionally, the port plug is threaded to the end of the axial channel.

[0015] Optionally, the port plug and the end of the axial channel are provided with sealing gaskets.

[0016] Optionally, a central shaft hole is provided in the middle of the central shaft block.

[0017] The beneficial effects of this utility model are as follows: Through the relative rotation design of the central shaft block and the outer cylinder sleeve, and the annular groove structure set between them, the hydraulic oil circuit can always be kept connected when the central shaft block and the outer cylinder sleeve rotate relative to each other at any angle, continuously or intermittently. The annular groove, as a dynamic oil chamber, ensures that oil is continuously and stably delivered from the axial channel of the central shaft block and the first hydraulic connection port to the second hydraulic connection port of the outer cylinder sleeve via the annular groove, completely solving the problems of easy entanglement, kinking, and wear of traditional pipelines in rotating applications. The flange connection plate provides a rigid connection foundation with the equipment body. The rotating bearing not only achieves low-friction, high-precision relative rotation between the central shaft block and the outer cylinder sleeve, but also bears the main radial and axial loads. This rotating hydraulic connector effectively solves the core problem of hydraulic power transmission and high load-bearing support for rotating components in equipment such as forklift clamps, realizing reliable, continuous, and multi-channel supply of hydraulic oil in a 360° rotation state, while possessing excellent load-bearing capacity and structural stability, significantly improving the working efficiency, safety, and service life of the equipment.

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of the structure of the rotary hydraulic connector of this utility model;

[0021] Figure 2 for Figure 1 Exploded view of a rotary hydraulic connector;

[0022] Figure 3 for Figure 1 A cross-sectional view of a rotary hydraulic connector.

[0023] Explanation of key component symbols:

[0024] 10. Flange connecting plate; 20. Central shaft block; 21. Axial channel; 22. First hydraulic connection port; 23. Outer ring platform; 24. Central shaft hole; 30. Outer cylinder bushing; 31. Second hydraulic connection port; 32. Inner ring platform; 40. Annular groove; 50. Rotary bearing; 60. Sealing ring; 70. Port plug. Detailed Implementation

[0025] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0026] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0029] Example

[0030] Reference Figures 1 to 3 The present invention proposes a rotary hydraulic connector, comprising: a flange connecting plate 10, a central shaft block 20, and an outer cylinder bushing 30;

[0031] The flange connecting plate 10 is fixed to one end of the central shaft block 20; the outer cylinder bushing 30 is rotatably sleeved on the outside of the central shaft block 20; the outer side of the central shaft block 20 and / or the inner side of the outer cylinder bushing 30 are provided with an annular groove 40; the central shaft block 20 is provided with an axially extending axial channel 21; the central shaft block 20 and the outer cylinder bushing 30 are respectively provided with a first hydraulic connection port 22 and a second hydraulic connection port 31 on their sides;

[0032] The lower part of the axial channel 21 is connected to the first hydraulic connection port 22, and the upper part is connected to the annular channel 40; the second hydraulic connection port 31 is connected to the annular channel 40; a rotary bearing 50 is provided between the central shaft block 20 and the outer cylinder bushing 30.

[0033] In this invention, the relative rotation design of the central shaft block 20 and the outer cylinder bushing 30, along with the annular groove 40 structure between them, ensures that the hydraulic circuit remains connected regardless of the relative rotation of the central shaft block 20 and the outer cylinder bushing 30 at any angle, continuously or intermittently. The annular groove 40, acting as a dynamic oil chamber, ensures that oil is continuously and stably delivered from the axial passage 21 of the central shaft block 20 and the first hydraulic connection port 22 to the second hydraulic connection port 31 of the outer cylinder bushing 30 via the annular groove 40, completely solving the problems of easy entanglement, kinking, and wear in traditional pipelines during rotational applications. The flange connecting plate 10 provides a rigid connection base to the main body of the equipment. The rotating bearing 50 not only enables low-friction, high-precision relative rotation between the central shaft block 20 and the outer cylinder bushing 30, but also bears the main radial and axial loads. This rotary hydraulic connector effectively solves the core problem of hydraulic power transmission and high load-bearing support for rotating components in equipment such as forklift clamps, realizing reliable, continuous, and multi-channel supply of hydraulic oil circuits in a 360° rotation state. At the same time, it has excellent load-bearing capacity and structural stability, significantly improving the working efficiency, safety, and service life of the equipment.

[0034] In this invention, two sets of rotary bearings 50 are provided, respectively located at both axial ends of the outer sleeve 30. The two sets of bearings are positioned at both axial ends of the outer sleeve 30: the dual support points evenly distribute the radial and axial forces, avoiding single bearing overload failure; and disperse frictional losses, making it suitable for high-frequency rotation conditions of forklifts.

[0035] Furthermore, the outer wall of the central shaft block 20 is provided with two outer ring platforms 23; the inner wall of the outer cylinder bushing 30 is provided with two inner ring platforms 32; the two outer ring platforms 23 correspond to the two inner ring platforms 32, and the two sets of rotary bearings 50 are respectively embedded between the two sets of outer ring platforms 23 and inner ring platforms 32. The nested design of the outer ring platforms 23 and inner ring platforms 32 avoids abnormal wear caused by assembly misalignment; mechanical force is transmitted through the ring platform-bearing-ring platform path, protecting the sealing structure from lateral compression.

[0036] In this embodiment, sealing rings 60 are embedded on the upper and lower sides of the annular channel 40 along the axial direction of the central shaft block 20. The double sealing rings 60 form a redundant barrier to withstand hydraulic pulsation impacts; adaptive wear compensation: the preload of the sealing rings 60 can adapt to the gap changes after long-term rotation; and provide a sealing basis for multi-channel parallel operation.

[0037] Specifically, several annular channels 40 are spaced apart along the axial direction of the central shaft block 20; several sets of first hydraulic connection ports 22, second hydraulic connection ports 31, and axial channels 21 are provided corresponding to several annular channels 40. Multiple sets of annular channels 40 and corresponding channels / interfaces: integrating traditional multi-joint functions within a single volume, adapting to the compact layout of multi-channel fixtures.

[0038] Preferably, a plurality of axial channels 21 are evenly spaced along the circumference of the central shaft block 20. Symmetrical oil channels counteract pressure fluctuations caused by rotational centrifugal force; uniform flow channels reduce local turbulent heating and extend seal life.

[0039] In this embodiment, the axial channel 21 extends below to the end face of the central shaft block 20; a port plug 70 is provided below the axial channel 21. The extended end face allows a long drill bit to form a deep hole in one go, avoiding bending of the channel; after the plug is removed, the inner wall can be inspected or cleared, and the sealing of the axial channel can be ensured.

[0040] Specifically, the port plug 70 is threadedly locked to the end of the axial channel 21. The self-locking thread prevents loosening and leakage caused by high-frequency vibration during the operation of the fixture.

[0041] In this embodiment, a sealing gasket is provided at the end of the port plug 70 and the axial channel 21. The sealing gasket at the end of the plug performs the main sealing function and prevents oil from corroding the threads.

[0042] In some embodiments, a central shaft hole 24 is provided in the center of the central shaft block 20. The hollow structure optimizes load distribution and improves fatigue strength; it can accommodate sensor cables or pneumatic pipelines, achieving electromechanical-hydraulic integration.

[0043] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A rotary hydraulic connector, characterized in that, include: Flange connecting plate (10), central shaft block (20) and outer cylinder bushing (30); The flange connecting plate (10) is fixed to one end of the central shaft block (20); the outer cylinder bushing (30) is rotatably sleeved on the outside of the central shaft block (20); the outer side of the central shaft block (20) and / or the inner side of the outer cylinder bushing (30) are provided with an annular groove (40); the central shaft block (20) is provided with an axially extending axial channel (21); the central shaft block (20) and the outer cylinder bushing (30) are respectively provided with a first hydraulic connection port (22) and a second hydraulic connection port (31) on their sides; The lower part of the axial channel (21) is connected to the first hydraulic connection port (22), and the upper part is connected to the annular channel (40); the second hydraulic connection port (31) is connected to the annular channel (40); a rotary bearing (50) is provided between the central shaft block (20) and the outer cylinder bushing (30).

2. The rotary hydraulic connector according to claim 1, characterized in that: Two sets of the rotary bearings (50) are provided, respectively located at both ends of the outer sleeve (30) in the axial direction.

3. The rotary hydraulic connector according to claim 2, characterized in that: The outer wall of the central shaft block (20) is provided with two outer ring platforms (23); the inner wall of the outer cylinder bushing (30) is provided with two inner ring platforms (32); the two outer ring platforms (23) correspond to the two inner ring platforms (32), and the two sets of rotary bearings (50) are respectively embedded between the two sets of outer ring platforms (23) and inner ring platforms (32).

4. The rotary hydraulic connector according to claim 1, characterized in that: The annular channel (40) is fitted with sealing rings (60) on the upper and lower sides along the axial direction of the central shaft block (20).

5. The rotary hydraulic connector according to claim 4, characterized in that: The annular channels (40) are provided at intervals along the axial direction of the central shaft block (20); the first hydraulic connection port (22), the second hydraulic connection port (31) and the axial channel (21) are provided in several groups corresponding to the annular channels (40).

6. The rotary hydraulic connector according to claim 5, characterized in that: Several of the axial channels (21) are evenly spaced along the circumference of the central shaft block (20).

7. The rotary hydraulic connector according to claim 1, characterized in that: The axial channel (21) extends below the end face of the central shaft block (20); a port plug (70) is provided below the axial channel (21).

8. The rotary hydraulic connector according to claim 7, characterized in that: The port plug (70) is threadedly locked to the end of the axial channel (21).

9. The rotary hydraulic connector according to claim 8, characterized in that: The port plug (70) and the end of the axial channel (21) are provided with sealing gaskets.

10. The rotary hydraulic connector according to claim 1, characterized in that: The central shaft block (20) has a central shaft hole (24) in the middle.

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