Oil pressure universal joint for robot
By introducing a hydraulic oil filtration structure and laser cladding inner coating technology into the robotic hydraulic universal joint, the problem of impurities easily entering the rotary joint is solved, resulting in a longer service life and higher sealing performance.
Patent Information
- Application Number
- CN202520606118.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-04-01
AI Technical Summary
Existing robot rotary joints are susceptible to the entry of tiny impurities into the gaps, leading to reduced lifespan and leakage problems.
A hydraulic universal joint with a hydraulic oil filter structure is designed. By setting a filter element and ball groove on the joint's moving ring, impurities are filtered out. Combined with laser cladding inner coating technology, the durability and sealing performance of the joint are improved.
It effectively filters impurities, extends the service life of the joint, prevents leakage, and improves the flexibility and compactness of the rotary joint.
Smart Images
Figure CN223754909U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of robot technology relates to a universal joint, especially in a kind of oil pressure universal joint for robot. BACKGROUND
[0002] For industrial robots, especially robots designed to work in limited and complex workspaces, flexibility and compactness are one of the main design requirements.
[0003] Robots usually include one or more rotary joints to achieve flexible positioning of the robot arm. In the pipe connection inside the robot, rotary joints are needed in many places, but because the medium in the pipe often contains tiny impurities, after the rotary joint is used for a period of time, these impurities can easily enter the gap between the joint components, not only reducing the service life of the rotary joint, but also possibly causing leakage and other problems. SUMMARY
[0004] The utility model aims at the above -mentioned problem existing in prior art, provides a kind of oil pressure universal joint for robot with hydraulic oil filtering structure.
[0005] The utility model discloses a kind of oil pressure universal joint for robot, including joint body, the joint body is composed of joint fixed ring and joint movable ring, the joint movable ring is set with the filter for hydraulic oil filtering on the position relative to oil inlet hole, the joint movable ring is provided with sliding portion, the joint movable ring is set with the movable slot for the installation of sliding portion, and the sliding portion is slid up and down in movable slot, connecting spring is arranged between the sliding portion and movable slot bottom, the joint movable ring is provided with several ball bearings, the sliding portion is set with the clamping groove one for the clamping of ball bearing, the filter is set with the clamping groove two for the clamping of ball bearing.
[0006] In the above-mentioned one kind of oil pressure universal joint for robot, the filter is composed of fixed ring and filter screen, the filter screen is set in the opening of fixed ring and filters the hydraulic oil entering the joint movable ring, the convex ring is fixedly arranged on the joint movable ring and at the oil inlet hole, the lower end surface of the fixed ring is attached to one side of the convex ring and is fixed by ball bearing and sliding portion.
[0007] In the above-mentioned one kind of oil pressure universal joint for robot, the joint fixed ring has vertical oil inlet passage, the joint movable ring is set with the oil passing groove for oil, and the oil inlet passage is communicated with the oil passing groove.
[0008] In the oil pressure universal joint for robot, the oil inlet hole is externally connected with an oil inlet pipeline, and the oil outlet hole is externally connected with an oil outlet pipeline.
[0009] In the oil pressure universal joint for robot, the upper and lower ends of the oil passage are respectively provided with upper and lower sealing rings.
[0010] In the oil pressure universal joint for robot, the upper and lower sealing rings are identical in structure and are both rotary glands.
[0011] In the oil pressure universal joint for robot, the fixed ring and the movable ring are both formed by laser cladding inner coating technology.
[0012] Compared with the prior art, the oil pressure universal joint for robot has the following advantages:
[0013] 1. The filter installed on the oil inlet hole of the movable ring filters the hydraulic oil entering the oil passage, thereby prolonging the service life of the product.
[0014] 2. The rotary joint restricts the brake oil in the predetermined oil passage by the two rotary sealing rings, so that the oil inlet hole of the movable ring and the oil outlet hole of the fixed ring are always connected. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 is a structural schematic view of the utility model.
[0016] Figure 2 is a sectional view of the utility model.
[0017] Figure 3 is a partially enlarged schematic view of the utility model.
[0018] In the drawing, 1 is a joint body, 2 is a fixed ring, 3 is a movable ring, 4 is an oil inlet hole, 5 is an oil outlet hole, 6 is a filter, 7 is a sliding part, 8 is a movable groove, 9 is a connecting spring, 10 is a ball, 11 is a first clamping groove, 12 is a second clamping groove, 13 is a fixed ring, 14 is a filter screen, 15 is a convex ring, 16 is an oil inlet channel, 17 is an oil passage, 18 is an upper sealing ring, and 19 is a lower sealing ring. DETAILED DESCRIPTION
[0019] The following is a specific embodiment of the utility model and further describes the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.
[0020] As Figure 1 , Figure 2 ,Figure 3 As shown, the oil pressure universal joint for robot comprises a joint body 1, the joint body 1 is composed of a joint fixed ring 2 and a joint movable ring 3, the joint movable ring 3 is provided with an oil inlet hole 4 for oil inlet, the joint fixed ring 2 is provided with an oil outlet hole 5 for oil outlet, the joint movable ring 3 is provided with a filter 6 for hydraulic oil filtration at a position relative to the oil inlet hole 4, the joint movable ring 3 is provided with a sliding part 7, the joint movable ring 3 is provided with a movable slot 8 for installing the sliding part 7, the sliding part 7 slides up and down in the movable slot 8, a connecting spring 9 is arranged between the sliding part 7 and the bottom of the movable slot 8, the joint movable ring 3 is provided with a plurality of balls 10, the sliding part 7 is provided with a clamping groove 11 for clamping the balls 10, the filter 6 is provided with a clamping groove 12 for clamping the balls 10.
[0021] Further, when the filter 6 needs to be installed, the sliding part 7 is moved to the inside of the movable slot 8 by applying pressure to the sliding part 7, the connecting spring 9 is compressed, one end of the ball 10 is inserted into the clamping groove 11, the sliding part 7 is installed in the oil inlet hole 4, after installation, the connecting spring 9 rebounds, the sliding part 7 is extended out of the movable slot 8, one end of the ball 10 is inserted into the clamping groove 12, thereby fixing the filter 6 at the oil inlet hole 4, filtering the hydraulic oil entering the joint movable ring 3, avoiding damage to internal parts due to impurities.
[0022] Further, the filter 6 is composed of a fixed ring 13 and a filter screen 14, the filter screen 14 is arranged at the opening of the fixed ring 13 and filters the hydraulic oil entering the joint movable ring 3, the joint movable ring 3 is fixedly provided with a convex ring 15 at the oil inlet hole 4, the lower end surface of the fixed ring 13 is attached to one side of the convex ring 15 and is fixed by the ball 10 and the sliding part 7.
[0023] Further, the joint fixed ring 2 has a vertical oil inlet channel 16, the joint movable ring 3 is provided with an oil passing groove 17 for oil passing, and the oil inlet channel 16 is in communication with the oil passing groove 17.
[0024] Further, the oil inlet hole 4 is connected with an oil inlet pipeline for oil inlet, and the oil outlet hole 5 is connected with an oil outlet pipeline for oil outlet.
[0025] Further, the joint fixed ring 2 and the joint movable ring 3 are respectively provided with an upper sealing ring 18 and a lower sealing ring 19 at the upper and lower ends of the oil passing groove 17.
[0026] Further, the upper sealing ring 18 and the lower sealing ring 19 have the same structure and are both rotating gaskets.
[0027] Further, the joint fixed ring 2 and the joint movable ring 3 are both formed by laser cladding inner coating technology. The laser cladding inner coating technology is mainly processed by a five-axis CNC machine tool, a magnesium alloy is used to process the movable ring, a blank is made, the surface is preliminarily processed, then a special alloy powder is matched with nanotubes, a laser coating technology is used to make a surface layer, and finally a hole tapping is performed on the rough surface, which greatly increases the hardness and smoothness of the product surface, and increases the structural strength and stability of the product during use.
[0028] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or use similar ways to replace, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.
[0029] Although the terms such as joint body 1, joint fixed ring 2, joint movable ring 3, oil inlet hole 4, oil outlet hole 5, filter 6, sliding part 7, movable groove 8, connecting spring 9, ball 10, clamping groove 11, clamping groove 12, fixed ring 13, filter screen 14, convex ring 15, oil inlet channel 16, oil passage 17, upper sealing ring 18, lower sealing ring 19, etc. are used more in the text, but the possibility of using other terms is not excluded. The use of these terms is only to facilitate the description and explanation of the essence of the present application; any additional limitation is contrary to the spirit of the present application.
Claims
1. An oil universal joint for a robot, comprising a joint body (1) composed of a joint fixed ring (2) and a joint movable ring (3), the joint movable ring (3) being provided with an oil inlet hole (4) for oil inlet, the joint fixed ring (2) being provided with an oil outlet hole (5) for oil outlet, characterized in that, The joint dynamic ring (3) is provided with a filter (6) for filtering hydraulic oil at a position relative to the oil inlet hole (4), the joint dynamic ring (3) is provided with a sliding part (7), the joint dynamic ring (3) is provided with a movable groove (8) for installing the sliding part (7), and the sliding part (7) slides up and down in the movable groove (8), a connecting spring (9) is arranged between the sliding part (7) and the bottom of the movable groove (8), the joint dynamic ring (3) is provided with a plurality of rolling balls (10), the sliding part (7) is provided with a clamping groove (11) for clamping the rolling ball (10), and the filter (6) is provided with a clamping groove (12) for clamping the rolling ball (10).
2. The oil universal joint for a robot according to claim 1, characterized in that, The filter (6) is composed of a fixed ring (13) and a filter screen (14), the filter screen (14) is arranged at the opening of the fixed ring (13) and filters the hydraulic oil entering the joint dynamic ring (3), the joint dynamic ring (3) is fixedly provided with a convex ring (15) at the oil inlet hole (4), the lower end surface of the fixed ring (13) is attached to one side of the convex ring (15) and is fixed by the rolling ball (10) and the sliding part (7).
3. The oil universal joint for a robot according to claim 1, characterized in that, The joint dynamic ring (3) is provided with an oil inlet channel (16) in the vertical direction, the joint dynamic ring (3) is provided with an oil passing groove (17) for passing oil, and the oil inlet channel (16) is communicated with the oil passing groove (17).
4. The oil universal joint for a robot according to claim 1, characterized in that, The oil inlet hole (4) is provided with an oil inlet pipeline for oil inlet, and the oil outlet hole (5) is provided with an oil outlet pipeline for oil outlet.
5. The oil universal joint for a robot according to claim 3, wherein The joint dynamic ring (3) and the joint dynamic ring (3) are provided with an upper sealing ring (18) and a lower sealing ring (19) at the upper and lower ends of the oil passing groove (17) respectively.
6. The oil universal joint for a robot according to claim 5, wherein The upper sealing ring (18) and the lower sealing ring (19) are the same structure, and are both rotating gaskets.
7. The oil universal joint for a robot according to claim 1, wherein The joint dynamic ring (2) and the joint dynamic ring (3) are both processed by laser cladding inner coating technology.