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CN-121989297-A - Robot joint dustproof sealing structure

CN121989297ACN 121989297 ACN121989297 ACN 121989297ACN-121989297-A

Abstract

The invention discloses a robot joint dustproof sealing structure which comprises an upper swing arm and a lower swing arm, wherein a first hinging seat is fixedly connected to the upper swing arm, a second hinging seat is fixedly connected to the lower swing arm, a hinging shaft is fixedly connected to the second hinging seat, the hinging shaft is inserted into the first hinging seat, the first hinging seat can rotate around the hinging shaft, and sealing structures are sleeved outside the end parts of the upper swing arm and the lower swing arm. The wrapping type structure adopted by the invention enhances the sealing effect of the robot joint, can ensure the excellent sealing effect even under complex and severe environments, has the advantages of simpler structure, smaller space occupation rate, smaller precision requirement of design production and suitability for mass production, can be effectively used for a long time in implementation, and can be replaced without replacing the whole sealing structure when the corrugated pipe is worn.

Inventors

  • LIU BING
  • Zan Chengzhi

Assignees

  • 太初轩辕(北京)科技有限公司

Dates

Publication Date
20260508
Application Date
20260303

Claims (9)

  1. 1. The utility model provides a robot joint dustproof seal structure, including last swing arm (1) and lower swing arm (2), its characterized in that, on last swing arm (1) rigid coupling has first articulated seat (3), rigid coupling has second articulated seat (4) on lower swing arm (2), rigid coupling has articulated shaft (5) on second articulated seat (4), in articulated shaft (5) inserts first articulated seat (3), and first articulated seat (3) can rotate around articulated shaft (5), go up swing arm (1) and the tip overcoat of lower swing arm (2) has seal structure; The sealing structure is of an up-down symmetrical structure, the sealing structure comprises threaded sleeve joint blocks (6) and rotary sleeve joint blocks (7), the threaded sleeve joint blocks (6) are respectively in threaded fit with the upper swing arm (1) and the lower swing arm (2), and the rotary sleeve joint blocks (7) are arranged between the two threaded sleeve joint blocks (6).
  2. 2. The robot joint dustproof sealing structure according to claim 1, characterized in that the surface of the threaded sleeve joint block (6) is provided with a step surface, the rotating sleeve joint block (7) is sleeved outside the threaded sleeve joint block (6), a fixed block (9) is fixedly connected to the surface of the step surface, an annular groove (10) is formed in the inner wall of the rotating sleeve joint block (7), the fixed block (9) is located in the annular groove (10), and the annular groove (10) can rotate on the fixed block (9).
  3. 3. The robot joint dustproof sealing structure according to claim 2, wherein a sliding groove (13) is further formed in the inner wall of the rotary sleeving block (7), one end of the sliding groove (13) extends to the side wall of the rotary sleeving block (7), the other end of the sliding groove (13) is connected with the annular groove (10), at least two fixing blocks (9) are arranged, and the fixing blocks (9) can slide into the sliding groove (13).
  4. 4. A robot joint dust seal structure according to claim 3, characterized in that a limit groove (12) is formed in the rotary sleeve joint block (7), a limit block (11) is connected in the limit groove (12) in a threaded manner, and the tail end of the limit block (11) can be inserted into the connection position of the chute (13) and the annular groove (10).
  5. 5. The robot joint dust seal structure according to claim 2, wherein the number of the rotary joint blocks (7) is two, and the rotary joint blocks (7) are connected through a corrugated pipe (8).
  6. 6. The robot joint dust-proof sealing structure according to claim 1, wherein the upper swing arm (1) is internally provided with an oil filling hole (14), the first hinge seat (3) is internally provided with a bearing (15), and the end part of the hinge shaft (5) is inserted into the bearing (15).
  7. 7. The dustproof sealing structure for the robot joint according to claim 6, wherein an elastic rubber ring (16) is arranged at a position, close to one end, inside the oil filling hole (14), and a through hole (17) is formed in the center of the elastic rubber ring (16).
  8. 8. The dustproof sealing structure of the robot joint according to claim 7, wherein the oil absorbing cotton (18) is fixedly connected to the other end of the oil filling hole (14), and the surface of the oil absorbing cotton (18) is in contact with the surface of the bearing (15).
  9. 9. The robot joint dustproof sealing structure according to claim 8, wherein a wrapping box (19) is arranged outside the oil absorbing cotton (18), an oil inlet is formed in the upper end of the wrapping box (19), and a notch is formed in the side face of the wrapping box (19).

Description

Robot joint dustproof sealing structure Technical Field The invention relates to the technical field of robots, in particular to a dustproof sealing structure for a robot joint. Background Robots, particularly industrial robots and outdoor work robots, require frequent relative rotational or swinging movements of their joints. Foreign matters such as dust, moisture, oil stains and the like existing in the working environment easily invade the interior of the robot through gaps at joints, so that precise components such as a speed reducer, a bearing, a motor and the like are worn, corroded and even lose efficacy, and the service life and the movement precision of the robot are seriously influenced. The existing robot joint sealing structure mostly adopts a single lip-shaped sealing ring or a framework oil seal. However, the single seal structure has limited protection against complex harsh environments. To improve the protection level, a double seal structure is used in some designs. For example, the sealing property is enhanced by adding a dust cover additionally to the outside of the joint with a sealing member interposed therebetween, or multiple protection is formed by providing multiple repeated sealing portions. However, these structures are often complex, take up a large space, and the outside seals are subject to wear during long-term dynamic use, and once worn, are inconvenient to replace, and costly to maintain. Disclosure of Invention Therefore, the invention provides the dustproof sealing structure for the robot joint, which solves the problems that the structure is generally complex, the occupied space is large, the sealing piece on the outer side is easy to wear in long-term dynamic use, and the robot joint is inconvenient to replace after being worn, and the maintenance cost is high in the prior art. In order to achieve the above object, the present invention provides the following technical solutions: The robot joint dustproof sealing structure comprises an upper swing arm and a lower swing arm, wherein a first hinging seat is fixedly connected on the upper swing arm, a second hinging seat is fixedly connected on the lower swing arm, a hinging shaft is fixedly connected on the second hinging seat, the hinging shaft is inserted into the first hinging seat, the first hinging seat can rotate around the hinging shaft, a sealing structure is sleeved outside the end parts of the upper swing arm and the lower swing arm, The sealing structure is of an up-down symmetrical structure and comprises a threaded sleeve joint block and a rotary sleeve joint block, the threaded sleeve joint block is respectively in threaded fit with the upper swing arm and the lower swing arm, and the rotary sleeve joint block is arranged between the two threaded sleeve joint blocks. Preferably, the surface of the screw sleeve joint block is provided with a step surface, the rotating sleeve joint block is sleeved outside the screw sleeve joint block, a fixed block is fixedly connected to the surface of the step surface, an annular groove is formed in the inner wall of the rotating sleeve joint block, the fixed block is located in the annular groove, and the annular groove can rotate on the fixed block. Preferably, the inner wall of the rotary sleeve joint block is also provided with a sliding groove, one end of the sliding groove extends to the side wall of the rotary sleeve joint block, the other end of the sliding groove is connected with the annular groove, at least two fixing blocks are arranged, and the fixing blocks can slide into the sliding groove. Preferably, a limiting groove is formed in the rotary sleeve joint block, a limiting block is connected in the limiting groove in a threaded mode, and the tail end of the limiting block can be inserted into the connecting position of the sliding groove and the annular groove. Preferably, the number of the rotary sleeve blocks is two, and the rotary sleeve blocks are connected through a corrugated pipe. Preferably, the upper swing arm is internally provided with an oil filling hole, the first hinge seat is internally provided with a bearing, and the end part of the hinge shaft is inserted into the bearing. Preferably, an elastic rubber ring is arranged at a position, close to one end, inside the oil filling hole, and a through hole is formed in the center of the elastic rubber ring. Preferably, the oil absorbing cotton is fixedly connected to the other end of the oil filling hole, and the surface of the oil absorbing cotton is in contact with the surface of the bearing. Preferably, the outside of oil absorption cotton is provided with the parcel box, and the upper end of parcel box has the oil inlet, and the side of parcel box is provided with the breach. The invention has the following advantages: the wrapping type structure adopted by the invention enhances the sealing effect of the robot joint, and can ensure the excellent sealing effect even in a complex and severe envir