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CN-121986009-A - Cover, sealing structure and industrial machine

CN121986009ACN 121986009 ACN121986009 ACN 121986009ACN-121986009-A

Abstract

A cover for closing a space around a grease discharging port for discharging lubricant from a sealed portion to be lubricated of an industrial machine body in an openable manner includes a through hole exposing the grease discharging port in a state where the cover is attached to the industrial machine body, a first mating surface provided around the through hole in a full-circle manner and opposed to a first supporting surface provided around the grease discharging port in the full-circle manner, and a second mating surface provided in a position opposed to the second supporting surface in the full-circle manner and surrounding an outer side of the first supporting surface in the full-circle manner, wherein the first mating surface is capable of sealing a periphery of the through hole by a first sealing member compressed between the first mating surface and the first supporting surface in the full-circle manner.

Inventors

  • Shan Kouliang

Assignees

  • 发那科株式会社

Dates

Publication Date
20260505
Application Date
20231017

Claims (13)

  1. 1. A cover, characterized in that, The cover can be opened to close the space around the grease discharging port for discharging lubricant from the sealed lubricated part of the industrial machine main body, The cover includes a through hole exposing the grease discharging port in a state where the cover is attached to the industrial machine body, a first engagement surface provided around the through hole so as to face a first support surface provided around the grease discharging port in a full-circle, and a second engagement surface provided so as to face a second support surface in a full-circle, the second support surface being provided at a position surrounding an outer side of the first support surface in a full-circle, The first mating surface is capable of sealing the periphery of the through-hole over the entire circumference with a first sealing member compressed between the first mating surface and the first supporting surface.
  2. 2. The cover of claim 1, wherein the cover is configured to be secured to the container, The first mating surface is provided with a first seal groove that surrounds the periphery of the through-hole over the entire circumference and is capable of accommodating the first seal member.
  3. 3. The cover of claim 2, wherein the cover is configured to be secured to the container, A second seal groove is provided in the second mating surface, extends over the entire circumference, and accommodates a second seal member compressed between the second mating surface and the second support surface.
  4. 4. A cap according to any one of claims 1 to 3, A plurality of threaded holes are arranged on the second supporting surface at intervals along the circumferential direction, The second mating surface is provided with a plurality of bolt holes, and the bolt holes are arranged at positions corresponding to the threaded holes and enable bolts to penetrate through.
  5. 5. The cover according to any one of claims 1 to 4, wherein, The first sealing member is an O-ring.
  6. 6. The cap of any one of claims 1 to 5, The first matching surface and the second matching surface are configured on the same plane.
  7. 7. A sealing structure is characterized in that, The sealing structure is used for closing the space around a grease discharging port in an openable way by a cover, the grease discharging port is used for discharging lubricant from a sealed lubricated part of an industrial machine main body, The seal structure is provided with: A first support surface and a second support surface provided on the industrial machine body, the first support surface being provided around the lipid discharge port in a full-circle range, the second support surface being provided at a position surrounding the outside of the first support surface in a full-circle range; A through hole provided in the cover, the through hole exposing the grease discharging port in a state where the cover is attached to the industrial machine main body, a first mating surface disposed so as to face the first support surface over the entire circumference, and a second mating surface disposed so as to face the second support surface over the entire circumference, and And a first sealing member that is compressed between the first mating surface and the first supporting surface, thereby sealing the periphery of the through hole over the entire circumference.
  8. 8. The seal structure of claim 7, wherein, The first seal groove is provided on the first mating surface or the first support surface, surrounds the periphery of the lipid discharge port in a full circumference, and can accommodate the first seal member.
  9. 9. The seal of claim 8, wherein the seal comprises a seal ring, A second seal groove is provided in the second mating surface or the second support surface, the second seal groove extending over the entire circumference and accommodating a second seal member compressed between the second mating surface and the second support surface.
  10. 10. The sealing structure according to any one of claims 7 to 9, wherein, A plurality of threaded holes are arranged on the second supporting surface at intervals along the circumferential direction, The second mating surface is provided with a plurality of bolt holes, and the bolt holes are arranged at positions corresponding to the threaded holes and enable bolts to penetrate through.
  11. 11. The sealing structure according to any one of claims 7 to 10, wherein, The first sealing member is an O-ring.
  12. 12. The sealing structure according to any one of claims 7 to 11, wherein, The first supporting surface and the second supporting surface are configured on the same plane.
  13. 13. An industrial machine, which is characterized in that, The industrial machine includes an industrial machine body, a cover attached to the industrial machine body, and a first seal member interposed between the cover and the industrial machine body, The industrial machine body includes a first support surface provided around a grease discharging port for discharging a lubricant from a sealed lubricated part over the entire circumference, and a second support surface provided at a position surrounding the outside of the first support surface over the entire circumference, The cover includes a through hole exposing the lipid discharge port in a state where the cover is attached to the industrial machine body, a first engagement surface disposed so as to face the first support surface over the entire circumference, and a second engagement surface disposed so as to face the second support surface over the entire circumference, The first sealing member is compressed between the first mating surface and the first supporting surface, so that the periphery of the through hole can be sealed over the entire circumference.

Description

Cover, sealing structure and industrial machine Technical Field The present invention relates to a cover, a seal structure, and an industrial machine. Background Conventionally, a lubricant discharge structure is known in which a lubricant such as grease is injected into a sealed portion to be lubricated of a reduction gear or the like, and used old lubricant is discharged from a grease discharge port (for example, refer to patent document 1). The lubricant discharging structure includes a tube connected to the grease discharging port, a plug for closing the tip of the tube so as to be openable, and a cap for directly accommodating the tube in a state where the tube is connected to the grease discharging port when the lubricant is not replaced. By providing a hole in the cap and exposing the plug at the front end of the tube from the cap, the plug can be removed and lubricant can be discharged from the open front end of the tube without removing the cap. Prior art literature Patent literature Patent document 1 Japanese patent laid-open publication No. 2005-177914 Disclosure of Invention Problems to be solved by the invention However, in this structure, a tube, a connection member for connecting the tube to the drain port, a joint for detachably attaching a plug to the tip of the tube, and an operation for attaching the tube are required. Accordingly, it is desirable to reduce the number of parts, the number of processing steps, and the number of assembling steps, and to facilitate the replacement operation at low cost without contaminating the inside with the lubricant discharged during the replacement. Solution for solving the problem The present invention provides a cap for sealing a space around a grease discharging port for discharging a lubricant from a sealed portion to be lubricated of an industrial machine body, the cap comprising a through hole for exposing the grease discharging port in a state where the cap is attached to the industrial machine body, a first mating surface provided around the through hole in a full-circle manner and opposed to a first supporting surface provided around the grease discharging port in a full-circle manner, and a second mating surface provided to oppose a second supporting surface in a full-circle manner, the second supporting surface being provided at a position surrounding an outer side of the first supporting surface in a full-circle manner, the first mating surface being capable of sealing the periphery of the through hole in a full-circle manner by a first sealing member compressed between the first mating surface and the first supporting surface. The present invention is also a sealing structure for sealing a space around a grease discharging port for discharging lubricant from a sealed portion of an industrial machine body by means of a cover, the sealing structure comprising a first support surface provided around the grease discharging port and a second support surface provided around the grease discharging port, the second support surface being provided at a position surrounding the outside of the first support surface in a full range, a through hole provided in the cover, a first mating surface and a second mating surface, the through hole exposing the grease discharging port in a state where the cover is attached to the industrial machine body, the first mating surface being disposed so as to face the first support surface in a full range, the second mating surface being disposed so as to face the second support surface in a full range, and a first sealing member capable of being compressed between the first and second support surfaces in a full range by being mated with the first sealing surface. The industrial machine according to another aspect of the present invention is an industrial machine comprising an industrial machine body, a cover attached to the industrial machine body, a first seal member disposed so as to face the first support surface in a circumferential direction, a first support surface disposed so as to face the second support surface in a circumferential direction, and a second support surface disposed so as to surround an outer side of the first support surface in a circumferential direction, wherein the cover has a through hole exposing the grease discharge port in a state in which the cover is attached to the industrial machine body, a first mating surface disposed so as to face the first support surface in a circumferential direction, and a second mating surface disposed so as to face the second support surface in a circumferential direction, wherein the first seal member is capable of being compressed in a circumferential direction between the first mating surface and the first support surface, thereby sealing the through hole in the circumferential direction. Drawings Fig. 1 is a partial longitudinal sectional view illustrating a cover, a seal structure, and an industrial machine according to an embodiment of the present invent