CN111692177A

CN111692177A - Convenient locating pin of dismantling

Info

Publication number: CN111692177A
Application number: CN202010474668.5A
Authority: CN
Inventors: 赵国梁
Original assignee: Dongguan Jiahong Electromechanical Technology Co ltd
Current assignee: HAIYAN HUILIAN GENERAL FITTING Co.,Ltd.
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2020-09-22
Anticipated expiration: 2040-05-29
Also published as: CN111692177B

Abstract

The invention discloses a positioning pin convenient to disassemble, which comprises a cylindrical body, wherein the body is formed with a rectangular hole with an opening at the lower side, a central hole penetrating through the body from top to bottom and a bearing hole penetrating through the rectangular hole in the radial direction, and the bearing hole is arranged on the inner wall of the upper end of the rectangular hole; a rectangular block matched with the rectangular hole is sleeved in the rectangular hole, pin holes are formed in two symmetrical surfaces of the rectangular block, a pin shaft is sleeved in each pin hole, and the outer end of each pin shaft is inserted in the bearing hole; the middle part shaping of rectangle piece has the screw hole, and the screw hole spiro union is at hexagon socket head cap screw's screw rod middle part including, and hexagon socket head cap screw's head plug bush is in the central hole, and the bottom mounting of screw rod has the round platform, and the shaping has downside open-ended hexagonal hole on the round platform. According to the invention, the positioning pin is ejected out of the positioning pin hole by rotating the screw through relative movement of the screw, so that damage to the engine body in the disassembly process is effectively avoided.

Description

Convenient locating pin of dismantling

Technical Field

The invention relates to the technical field of engines, in particular to a positioning pin convenient to disassemble.

Background

The locating pin that uses on the engine at present generally is the standard component, and its convenient to use, nevertheless inconvenient or extremely difficult disassembling when spare part is disassembled. And when disassembling, when the locating pin is installed in the locating pin hole on the plane with higher sealing requirement, like the position such as the upper top surface of the cylinder body, the sealing surface can be damaged in the disassembling process, thereby causing that the parts which can be used secondarily originally can only be scrapped, and causing resource waste.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a positioning pin convenient to disassemble, which ejects out of a positioning pin hole by rotating a screw through relative movement of the screw, thereby effectively avoiding damage to an engine body in the disassembling process.

The scheme for solving the technical problems is as follows:

a positioning pin convenient to disassemble comprises a cylindrical body, wherein a rectangular hole with an opening at the lower side, a central hole penetrating through the body from top to bottom and a bearing hole penetrating through the rectangular hole in the radial direction are formed in the body, and the bearing hole is formed in the inner wall of the upper end of the rectangular hole; a rectangular block matched with the rectangular hole is sleeved in the rectangular hole, pin holes are formed in two symmetrical surfaces of the rectangular block, a pin shaft is sleeved in each pin hole, and the outer end of each pin shaft is inserted in the bearing hole; the middle part shaping of rectangle piece has the screw hole, and the screw hole spiro union is at hexagon socket head cap screw's screw rod middle part including, and hexagon socket head cap screw's head plug bush is in the central hole, and the bottom mounting of screw rod has the round platform, and the shaping has downside open-ended hexagonal hole on the round platform.

The pin shaft is formed with a round hole with an opening at the inner side, a spring is sleeved in the round hole, the outer end of the spring is fixed on the bottom surface of the round hole, and the inner end of the spring is fixed on the bottom surface of the pin hole.

And the outer end of the pin shaft is formed with a round angle or a chamfer angle.

The outer diameter of the pin shaft is in clearance fit with the inner diameter of the pin hole and the inner diameter of the bearing hole.

And the outer end of the bearing hole is formed with a chamfer or a fillet.

A polygonal boss is formed at the lower end of the screw rod; the circular truncated cone is provided with a plurality of deformation holes matched with the polygonal bosses, and the polygonal bosses are inserted in the plurality of deformation holes.

The upper end of the head is lower than the upper end face of the body, and the lower bottom face of the circular truncated cone is higher than the lower end face of the body.

The invention has the following outstanding effects: compared with the prior art, the positioning pin is ejected out of the positioning pin hole by rotating the screw and utilizing the relative movement of the screw, so that the damage to an engine body in the disassembly process is effectively avoided.

Drawings

FIG. 1 is a half sectional view of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1 taken about A-A;

FIG. 3 is a cross-sectional view of FIG. 1 taken about B-B;

fig. 4 is a three-dimensional schematic of the present invention.

Detailed Description

In an embodiment, as shown in fig. 1 to 4, a positioning pin convenient to disassemble includes a cylindrical body 1, the body 1 is formed with a rectangular hole 11 with an open lower side, a central hole 12 penetrating up and down, and a bearing hole 13 penetrating the rectangular hole 11 in a radial direction, the bearing hole 13 is arranged on the inner wall of the upper end of the rectangular hole 11; the rectangular hole 11 is internally sleeved with a rectangular block 2 matched with the rectangular hole, pin holes 21 are formed in two symmetrical surfaces of the rectangular block 2, a pin shaft 3 is sleeved in each pin hole 21, and the outer end of each pin shaft 3 is inserted and sleeved in the bearing hole 13; the middle part of the rectangular block 2 is formed with a threaded hole 22, the threaded hole 22 is screwed in the middle of a screw rod 41 of the socket cap screw 4, a head 42 of the socket cap screw 4 is inserted in the central hole 12, a circular truncated cone 5 is fixed at the bottom end of the screw rod 41, and a hexagonal hole 51 with an opening at the lower side is formed in the circular truncated cone 5.

More specifically, the pin 3 is formed with a circular hole 31 with an inner side opened, the spring 6 is sleeved in the circular hole 31, an outer end of the spring 6 is fixed on a bottom surface of the circular hole 31, and an inner end of the spring 6 is fixed on a bottom surface of the pin hole 21.

Furthermore, the outer end of the pin 3 is formed with a round angle or a chamfer.

Furthermore, the outer diameter of the pin shaft 3 is in clearance fit with the inner diameter of the pin hole 21 and the inner diameter of the bearing hole 13.

Furthermore, the outer end of the bearing hole 13 is formed with a chamfer or a fillet.

More specifically, a polygonal boss 43 is formed at the lower end of the screw rod 41; the circular truncated cone 5 is provided with a multi-deformation hole matched with the polygonal boss 43, and the polygonal boss 43 is inserted and sleeved in the multi-deformation hole.

More specifically, the upper end of the head 42 is lower than the upper end surface of the body 1, and the lower bottom surface of the circular truncated cone 5 is higher than the lower end surface of the body 1.

The working principle is as follows: as shown in fig. 1, the positioning pin is inserted into a positioning hole of a component of the engine, such as a crankcase 9; when the positioning pin needs to be removed, the inner hexagon screw 4 is rotated through the inner hexagon wrench, the inner hexagon screw 4 moves downwards under the action of the rectangular block 2, the inner hexagon screw 4 drives the circular truncated cone 5 to move downwards and presses against the bottom surface of the positioning pin hole, the inner hexagon screw 4 cannot move continuously, the body 1 of the positioning pin is pushed upwards through the reaction of the rectangular block 2, the positioning pin is loosened a little relatively after being pushed upwards for a certain distance, and at the moment, the positioning pin can be directly pulled out through a simple tool or a hand; when the upper end of the positioning pin is left on other parts of the generator and the lower end of the positioning pin is separated, the hexagon socket head cap screw can be driven to rotate by the hexagon socket head cap wrench and the hexagonal hole 51 on the circular truncated cone 5, and the hexagon socket head cap screw moves upwards to prop the body to the lower side; thus, bidirectional unplugging can be realized simultaneously.

Finally, the above embodiments are only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so that all equivalent technical solutions also belong to the scope of the present invention, and the scope of the present invention should be defined by the claims.

Claims

1. The utility model provides a convenient locating pin of dismantling, is including being cylindric body (1), its characterized in that: the body (1) is formed with a rectangular hole (11) with an opening at the lower side, a central hole (12) penetrating through the rectangular hole up and down and a bearing hole (13) penetrating through the rectangular hole (11) in the radial direction, and the bearing hole (13) is arranged on the inner wall of the upper end of the rectangular hole (11); the rectangular holes (11) are internally sleeved with rectangular blocks (2) matched with the rectangular holes, pin holes (21) are formed in two symmetrical surfaces of each rectangular block (2), a pin shaft (3) is sleeved in each pin hole (21), and the outer ends of the pin shafts (3) are inserted and sleeved in the bearing holes (13); the middle part shaping of rectangle piece (2) has screw hole (22), screw hole (22) spiro union at screw rod (41) middle part of hexagon socket screw (4) including, head (42) plug bush of hexagon socket screw (4) is in centre bore (12), and the bottom mounting of screw rod (41) has round platform (5), and the shaping has downside open-ended hexagonal hole (51) on round platform (5).

2. The locating pin of claim 1, wherein: the pin shaft (3) is formed with a round hole (31) with an opening at the inner side, a spring (6) is sleeved in the round hole (31), the outer end of the spring (6) is fixed on the bottom surface of the round hole (31), and the inner end of the spring (6) is fixed on the bottom surface of the pin hole (21).

3. A conveniently detachable locating pin according to claim 2, characterized in that: and the outer end of the pin shaft (3) is formed with a fillet or a chamfer.

4. The locating pin of claim 1, wherein: the outer diameter of the pin shaft (3) is in clearance fit with the inner diameter of the pin hole (21) and the inner diameter of the bearing hole (13).

5. The locating pin of claim 1, wherein: and the outer end of the bearing hole (13) is formed with a chamfer or a fillet.

6. The locating pin of claim 1, wherein: a polygonal boss (43) is formed at the lower end of the screw rod (41); the round platform (5) is formed with a multi-deformation hole matched with the polygonal boss (43), and the polygonal boss (43) is inserted and sleeved in the multi-deformation hole.

7. The locating pin of claim 1, wherein: the upper end of the head (42) is lower than the upper end surface of the body (1), and the lower bottom surface of the circular truncated cone (5) is higher than the lower end surface of the body (1).