Search

CN-121989176-A - Expansion sleeve device for preventing locating pin from falling off and use method

CN121989176ACN 121989176 ACN121989176 ACN 121989176ACN-121989176-A

Abstract

The invention discloses an expansion sleeve device for preventing a locating pin from falling off and a use method thereof, relating to the technical field of component assembly and comprising an expansion sleeve body, a rod body component arranged in the expansion sleeve body, the extrusion subassembly sets up in the surface of body of rod subassembly, and the extrusion subassembly is used for extruding the inside of expanding the cover body, promotes subassembly threaded connection in the tip of body of rod subassembly, and promotes the subassembly and be used for promoting the extrusion subassembly. According to the invention, the pushing assembly is assembled on the rod body assembly in advance, the extrusion assembly and the expansion sleeve body are assembled on the rod body assembly, then the expansion sleeve body is plugged into the pin hole, so that the rod body assembly cannot rotate, then the pushing assembly is rotated, the pushing assembly drives the extrusion assembly to move, the expansion sleeve body is extruded by the extrusion assembly, the outer surface of the expansion sleeve body is tightly attached to the pin hole, then the positioning pin body is inserted into the pin hole, and the positioning pin body is limited by the fixed expansion sleeve body, so that the positioning pin body is prevented from falling.

Inventors

  • ZHANG YANNING
  • CHEN YUN
  • BI CHAO
  • WANG XIANGYANG
  • ZENG YU
  • ZHANG SHAOJUN

Assignees

  • 宜昌船舶柴油机有限公司

Dates

Publication Date
20260508
Application Date
20260310

Claims (10)

  1. 1. An expansion sleeve device for preventing a locating pin from falling off, comprising: An expansion sleeve body (5); the rod body assembly (1), the said rod body assembly (1) is set up in the inside of the body (5) of the expansion shell; The extrusion assembly (2) is arranged on the outer surface of the rod body assembly (1), and the extrusion assembly (2) is used for extruding the inside of the expansion sleeve body (5); The pushing component (6) is in threaded connection with the end part of the rod body component (1), and the pushing component (6) is used for pushing the extrusion component (2).
  2. 2. An expansion sleeve device for preventing a positioning pin from falling off according to claim 1, wherein said rod assembly (1) comprises: the threaded rod (101) is inserted and arranged in the middle of the expansion sleeve body (5); The fixed round block (102), fixed round block (102) fixed connection is in the terminal surface of threaded rod (101), inside groove (103) have been seted up to one side of fixed round block (102).
  3. 3. An expansion sleeve device for preventing the detachment of a positioning pin according to claim 2, characterized in that said pressing assembly (2) comprises: An upper extrusion block (201), wherein the upper extrusion block (201) is in threaded connection with one end of the threaded rod (101); The lower extrusion block (202), the lower extrusion block (202) is inserted and arranged at the other end of the threaded rod (101), and the lower extrusion block (202) is positioned below the upper extrusion block (201).
  4. 4. An expansion sleeve device for preventing a positioning pin from falling off according to claim 3, wherein the outer contour of the upper extrusion block (201) and the outer contour of the lower extrusion block (202) are both conical, a threaded hole (3) matched with the threaded rod (101) is formed in the middle of the upper extrusion block (201), and a through hole (4) is formed in the middle of the lower extrusion block (202).
  5. 5. An expansion sleeve device for preventing a positioning pin from falling off according to claim 4, wherein the expansion sleeve body (5) comprises: The sleeve body (501) is sleeved on the outer side of the extrusion assembly (2); The upper compression cavity (502), the upper compression cavity (502) is arranged at the top of the sleeve body (501), and the inner contour of the upper compression cavity (502) is matched with the outer contour of the upper extrusion block (201); the lower compression cavity (503), the bottom of cover body (501) is offered in compression cavity (503), the inside profile in compression cavity (503) down and the outside profile looks adaptation of extrusion piece (202) down.
  6. 6. An expansion sleeve device for preventing the detachment of a positioning pin according to claim 5, characterized in that the pushing assembly (6) comprises: a push ring (601), the push ring (601) being screwed to the outer surface of the threaded rod (101); The fixed block (602), fixed block (602) fixed connection is in one side of promote ring (601), be provided with movable rod (603) on fixed block (602), be provided with spacing subassembly (7) between fixed block (602) and movable rod (603).
  7. 7. An expansion sleeve device for preventing the falling off of a positioning pin according to claim 6, characterized in that said limiting assembly (7) comprises: The through cavity (701), the through cavity (701) is arranged in the middle of the fixed block (602), and through grooves (702) are arranged on two sides of the through cavity (701); The screw thread groove (703), the screw thread groove (703) is formed in one end of the movable rod (603), a screw thread column (704) is connected in the screw thread groove (703) in a screw thread mode, and a limiting block (705) is fixedly connected to one end of the screw thread column (704); The limiting round block (706), the limiting round block (706) is fixedly connected to the other end of the movable rod (603).
  8. 8. The expansion sleeve device for preventing the positioning pin from falling off according to claim 7, wherein the movable rod (603) is inserted into the through cavity (701), and the external cross section outline dimension of the movable rod (603) is matched with the internal cross section wheel dimension of the through cavity (701).
  9. 9. The expansion sleeve device for preventing the positioning pin from falling off according to claim 8, wherein a positioning pin body (9) is arranged above the expansion sleeve body (5), and a flat gasket (8) is arranged between the lower extrusion block (202) and the fixed round block (102).
  10. 10. A method for using an expansion sleeve device for preventing a locating pin from falling off, which implements the expansion sleeve device for preventing a locating pin from falling off according to any one of claims 1 to 9, characterized in that the method comprises the following specific steps: firstly, rotating a push ring (601) into the outer surface of a threaded rod (101) until the push ring (601) is close to a fixed round block (102), and then sleeving a flat gasket (8) into the threaded rod (101) until the flat gasket (8) is close to the outer surface of the push ring (601); step two, sheathing the lower extrusion block (202) along the threaded rod (101) until the lower extrusion block (202) is attached to the flat gasket (8); Step three, sleeving the sleeve body (501) along the threaded rod (101), enabling the lower compression cavity (503) to be attached to the outer surface of the lower extrusion block (202), and then enabling the upper extrusion block (201) to be rotatably sleeved on the threaded rod (101) and enabling the outer surface of the upper extrusion block (201) to be close to the upper compression cavity (502); Step four, insert in the pinhole with expanding sleeve body (5), block inside groove (103), make threaded rod (101) can not rotate, through rotatory pushing component (6), make go up push ring (601) move, thereby drive down extrusion piece (202) and move up, make down extrusion piece (202) and go up extrusion piece (201) and be close to, so make extrusion piece (201) extrusion upper pressurized chamber (502), extrusion piece (202) extrusion lower pressurized chamber (503) down, thereby make sleeve body (501) deformation, thereby extrude inside the pinhole, thereby fix expanding sleeve body (5), then put into locating pin body (9) along the pinhole, utilize expanding sleeve body (5) to carry out spacing to locating pin body (9).

Description

Expansion sleeve device for preventing locating pin from falling off and use method Technical Field The invention relates to the technical field of component assembly, in particular to an expansion sleeve device for preventing a locating pin from falling off and a use method thereof. Background In the assembly process of parts in the mechanical manufacturing industry, a cylindrical pin is commonly used as a positioning element for accurately determining the relative position between two parts, and is used for reference positioning in mechanical assembly, so that the consistent assembly precision of each part can be maintained after repeated installation or disassembly. For example, when the low-pressure cylinder of the steam turbine is vertically installed (connected) before the finish machining of the combined hole system, positioning process pins are required to be used for positioning and assembling, as the pin holes at the lower parts of the parts are through holes, the sizes of the unclosed pin holes and the lower ends of the unclosed pin holes are larger than those of cylindrical pins, the positioning pins can fall off from the pin holes due to the fact that the lower parts of the positioning pins are not blocked, and the positioning and installing conditions are not met. In order to solve the problem that the locating pin falls off, a stop block is welded on the back of the pin hole to prevent the locating pin from falling off, however, the process scheme influences the quality of a spot facing surface of a finished product on the back of the pin hole, and the workload of removing the stop block and polishing by a later bench worker is large, so that the production period is influenced. Disclosure of Invention The invention aims to provide an expansion sleeve device for preventing a locating pin from falling off and a use method thereof, so as to solve the problems in the prior art. In order to achieve the above purpose, the present invention provides the following technical solutions: In a first aspect, the present invention provides an expansion sleeve device for preventing a locating pin from falling off, comprising: An expansion sleeve body; The rod body assembly is arranged in the expansion sleeve body; the extrusion assembly is arranged on the outer surface of the rod body assembly and is used for extruding the inside of the expansion sleeve body; The pushing component is in threaded connection with the end part of the rod body component and is used for pushing the extrusion component. Preferably, the rod assembly includes: The threaded rod is inserted and arranged in the middle of the expansion sleeve body; The fixed round block is fixedly connected to the end face of the threaded rod, and one side of the fixed round block is provided with an inner groove. Preferably, the pressing assembly includes: The upper extrusion block is in threaded connection with one end of the threaded rod; The lower extrusion block is inserted and arranged at the other end of the threaded rod, and the lower extrusion block is positioned below the upper extrusion block. Preferably, the outer contour of the upper extrusion block and the outer contour of the lower extrusion block are conical, a threaded hole matched with the threaded rod is formed in the middle of the upper extrusion block, and a through hole is formed in the middle of the lower extrusion block. Preferably, the expansion sleeve body comprises: The sleeve body is sleeved on the outer side of the extrusion assembly; the upper compression cavity is arranged at the top of the sleeve body, and the inner contour of the upper compression cavity is matched with the outer contour of the upper extrusion block; The lower compression cavity is arranged at the bottom of the sleeve body, and the inner contour of the lower compression cavity is matched with the outer contour of the lower extrusion block. Preferably, the pushing assembly comprises: the pushing ring is in threaded connection with the outer surface of the threaded rod; the fixed block, fixed block fixed connection is in one side of promote the ring, be provided with the movable rod on the fixed block, be provided with spacing subassembly between fixed block and the movable rod. Preferably, the limiting assembly includes: The through cavity is formed in the middle of the fixed block, and through grooves are formed in two sides of the through cavity; The thread groove is formed in one end of the movable rod, a thread column is connected in the thread groove in a threaded mode, and a limiting block is fixedly connected to one end of the thread column; the limiting round block is fixedly connected to the other end of the movable rod. Preferably, the movable rod is inserted into the through cavity, and the external section outline dimension of the movable rod is matched with the internal section wheel dimension of the through cavity. Preferably, a locating pin body is arranged above the expansion sleeve body