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CN-224201295-U - Sealing device for vacuum tube of bolt tightening equipment

CN224201295UCN 224201295 UCN224201295 UCN 224201295UCN-224201295-U

Abstract

The utility model relates to the technical field of automatic assembly equipment, in particular to a sealing device of a vacuum tube of bolt tightening equipment, which comprises a sealing base and a sealing mechanism, wherein the sealing base is used for being detachably connected with an air extraction base, the sealing mechanism is used for sealing a tightening rod and the vacuum tube, the sealing base is provided with a mounting hole for penetrating the tightening rod, the sealing mechanism comprises a first sealing piece and a second sealing piece, the first sealing piece is mounted in the mounting hole and sleeved on the tightening rod, and the second sealing piece is mounted on the surface of the sealing base and is used for being abutted with the end face of the vacuum tube. The utility model can effectively improve the stability of the sealing structure of the vacuum tube without improving the structure of the vacuum tube, and avoid the sealing failure caused by friction of the tightening rod.

Inventors

  • MO PENGFEI
  • ZHANG JIE
  • FAN DEHUI
  • Wen Senjie
  • LI BAIXING

Assignees

  • 广汽传祺汽车有限公司

Dates

Publication Date
20260505
Application Date
20250521

Claims (10)

  1. 1. The utility model provides a sealing device of bolt tightening equipment vacuum tube, its characterized in that includes sealing base (100) that are used for dismantling with bleed base (500) and is used for sealing tightening pole (600) and sealing mechanism (200) of vacuum tube (700), sealing base (100) are provided with mounting hole (111) that are used for penetrating tightening pole (600), sealing mechanism (200) include first sealing member (210) and second sealing member (220), first sealing member (210) install in mounting hole (111) and suit in tightening pole (600) are last, second sealing member (220) install in sealing base (100) surface and be used for with the terminal surface butt of vacuum tube (700).
  2. 2. The sealing device of a vacuum tube of a bolt tightening apparatus according to claim 1, wherein the first sealing member (210) is an oil seal, the second sealing member (220) is a sealing ring, a ring groove (112) is provided on the sealing base (100) outside the mounting hole (111), the second sealing member (220) is mounted in the ring groove (112), and the first sealing member (210) is in interference fit with the mounting hole (111).
  3. 3. The sealing device for a vacuum tube of a bolt tightening apparatus according to claim 1, further comprising a locking mechanism (300), wherein the sealing base (100) comprises an a-side bar (110) and B-side bars (120) located on both sides of the a-side bar (110), the a-side bar (110) and the B-side bars (120) form a mounting cavity for accommodating a suction base (500), the mounting hole (111) is located on the a-side bar (110), and the locking mechanism (300) is disposed on both the B-side bars (120).
  4. 4. A sealing arrangement for a vacuum tube of a screw tightening device according to claim 3, characterized in that the locking mechanism (300) comprises a clamping part (310) and a driving part (320), the clamping part (310) being in abutment with a surface of the suction base (500), the driving part (320) being connected to the clamping part (310).
  5. 5. The sealing device for a vacuum tube of a bolt tightening apparatus according to claim 4, wherein the clamping portion (310) comprises a clamping block (311) and a cushion pad (312), the clamping block (311) is fixedly connected with the cushion pad (312), and the cushion pad (312) abuts against the suction base (500).
  6. 6. The sealing device for a vacuum tube of a bolt tightening apparatus according to claim 4, wherein said driving portion (320) comprises a screw (321) and a handle (322), said screw (321) having one end connected to said handle (322) and the other end connected to said clamping portion (310), said screw (321) being screwed to said B-side bar (120).
  7. 7. A sealing arrangement for a vacuum tube of a bolt tightening apparatus according to claim 6, characterized in that the locking mechanism (300) further comprises a locking portion (330), the locking portion (330) being connected to the driving portion (320).
  8. 8. A sealing arrangement for a vacuum tube of a screw tightening device according to claim 7, characterized in that the locking part (330) comprises a nut member (331), which nut member (331) is in threaded connection with the screw (321).
  9. 9. The sealing device for a vacuum tube of a bolt tightening apparatus according to any one of claims 3 to 8, further comprising a telescopic adjustment mechanism (400), said a-side bar (110) being slidably connected to said B-side bar (120) by said telescopic adjustment mechanism (400), said telescopic adjustment mechanism (400) comprising a slide bar (410) and a slide hole (420) slidably connected to each other, said slide hole (420) being located at one end of said B-side bar (120), said slide bar (410) being located at one end of said a-side bar (110), said slide hole (420) being slidably connected to said slide bar (410).
  10. 10. The sealing device for the vacuum tube of the bolt tightening device according to claim 9, wherein a plurality of grooves (421) are formed in the sliding hole (420), a plurality of elastic protrusions (411) are formed on the sliding rod (410), the elastic protrusions (411) are connected with the grooves (421) in a clamping mode, and the grooves (421) and the elastic protrusions (411) are all arc-shaped.

Description

Sealing device for vacuum tube of bolt tightening equipment Technical Field The utility model relates to the technical field of automatic assembly equipment, in particular to a sealing device for a vacuum tube of bolt tightening equipment. Background In fields such as automobile manufacturing, mechanical assembly, etc., send nail tightening equipment to be the key equipment that realizes bolt automated assembly. In the prior art, a nail feeding and tightening device generally adopts a design that a nail sucking vacuum tube and a tightening rod are coaxially integrated, after a bolt is grabbed and positioned to a target hole site through vacuum absorption, the vacuum tube releases the negative pressure to put down the bolt, the tightening rod slides downwards in the vacuum tube to be in contact with the bolt, and the tightening operation is completed. The sealing structure at the tail of the nail-suction vacuum tube is mainly a nylon sealing ring, and the sealing interface is formed by the contact of the elasticity of the nylon sealing ring and the outer wall of the tightening rod so as to maintain vacuum negative pressure. However, due to the fact that the tightening rod needs to perform axial movement and high-speed rotation at the same time in operation, the existing sealing structure has the remarkable defects that the abrasion resistance of a nylon material is poor, a gap is formed between the sealing interface and the tightening rod due to abrasion after long-term use, vacuum leakage is caused, meanwhile, the nylon material is easy to soften and deform due to heat generated by continuous friction, the sealing reliability is further reduced, dust or foreign matters in an external environment easily invade the sealing interface, and sealing failure is accelerated. These problems force equipment to be frequently shut down and maintained, and seriously affect assembly efficiency and cost. Although the prior art attempts to alleviate the above problems by replacing the sealing material or adding a sealing layer level, there are limitations that only the sealing material is replaced, there still exists a problem that the sealing material is easy to fail, and the replacement of the sealing structure needs to correspondingly modify the structure of the vacuum tube, so that the modification cost is too high. Therefore, how to design a sealing structure which has dynamic motion adaptability, long-acting sealing stability and simple structure in a limited space becomes a technical problem to be solved. Disclosure of utility model The utility model aims to solve the problem that a sealing structure between a tightening rod and a vacuum tube in the prior art is easy to fail, and provides a sealing device for the vacuum tube of bolt tightening equipment. In order to solve the technical problems, the utility model adopts the following technical scheme: The utility model provides a sealing device of bolt tightening equipment vacuum tube, including be used for with the base of bleeding can dismantle the sealing base who is connected with be used for sealing tightening pole and the sealing mechanism of vacuum tube, sealing base is provided with the mounting hole that is used for penetrating the tightening pole, sealing mechanism includes first sealing member and second sealing member, first sealing member install in the mounting hole and suit in tightening pole, the second sealing member install in sealing base surface and be used for with the terminal surface butt of vacuum tube. In the working process of the scheme, when the external air extraction equipment is started during air extraction, the air extraction base is used for extracting air from the vacuum tube, so that negative pressure is formed in the vacuum tube, at the moment, the first sealing piece and the second sealing piece of the sealing mechanism are respectively arranged at two sides of the mounting hole (namely, the two ends of the outer part of the connecting part of the vacuum tube and the tightening rod), and a bidirectional isolation barrier is formed outside. When the vacuum tube is positioned and placed, the negative pressure of the vacuum tube is relieved, the tightening rod axially slides in the vacuum tube to be in butt joint with the bolt and is tightened, when the whole sealing mechanism seals the tightening rod and the vacuum tube outside, an oil film is formed between the first sealing member and the tightening rod to reduce abrasion and realize sealing, the second sealing member is in butt joint with the end face of the vacuum tube and does not rotate along with the rotation of the tightening rod, the abrasion of the tightening rod during the axial sliding and circumferential rotation of the vacuum tube is greatly reduced, the whole sealing mechanism has both dynamic motion adaptability and long-acting sealing stability, and simultaneously the sealing base is arranged on the air extraction base without complex modification of the structure