CN215409638U

CN215409638U - Assembling stagnation-proof easily-pulled cylindrical pin

Info

Publication number: CN215409638U
Application number: CN202120916230.8U
Authority: CN
Inventors: 刘建征; 陈家访; 吴祖理; 杨云江; 周文
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2022-01-04
Anticipated expiration: 2031-04-29

Abstract

The utility model discloses a cylindrical pin capable of preventing stagnation and being pulled out easily during assembly, which comprises a first component, a second component and the cylindrical pin, wherein the first component and the second component are provided with pin holes corresponding to each other; the cylindrical pin is divided into a positioning end and a guiding end, and a pin hole of the first component is a blind hole and is in interference fit with the positioning end; the guide end is connected with the pin hole of the second component; the cylindrical pin is provided with an exhaust structure, one end of the exhaust structure is arranged from the end face of the positioning end to the guide end along the axial direction of the cylindrical pin, and the length of the exhaust structure is 1/2-3/4 of the length of the cylindrical pin; and guide chamfers are arranged at two ends of the cylindrical pin. The utility model has the advantages of simple structure, convenient installation and disassembly and the like.

Description

Assembling stagnation-proof easily-pulled cylindrical pin

Technical Field

The utility model relates to the technical field of engine accessory assembly, in particular to a cylindrical pin which is anti-stagnation and easy to pull out during assembly.

Background

In the field of mechanical assembly, a part positioning pin with flatness requirements is usually positioned by adopting a cylindrical pin and is fixed in a part pin hole by interference fit. Because interference fit in the assembling process of the cylindrical pin, and pin holes of parts are basically of blind hole structures, when the cylindrical pin is assembled, air in the pin holes cannot be discharged, air resistance is generated, the cylindrical pin cannot be assembled in place, and the assembling quality of the cylindrical pin is influenced. And part of the cylindrical pins needing to be reworked and disassembled are difficult to pull out due to the fact that the cavities in the pin holes are close to a vacuum state.

The above background disclosure is only for the purpose of assisting understanding of the concept and technical solution of the present invention and does not necessarily belong to the prior art of the present patent application, and should not be used for evaluating the novelty and inventive step of the present application in the case that there is no clear evidence that the above content is disclosed at the filing date of the present patent application.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a cylindrical pin which is simple in structure and convenient to mount and dismount.

Therefore, the utility model provides a cylindrical pin which is anti-stagnation and easy to pull out.

Preferably, the utility model can also have the following technical features:

the cylindrical pin comprises a first component, a second component and the cylindrical pin, wherein the first component and the second component are provided with pin holes corresponding to each other; the cylindrical pin is divided into a positioning end and a guiding end, and a pin hole of the first component is a blind hole and is in interference fit with the positioning end; the guide end is connected with the pin hole of the second component; the cylindrical pin is provided with an exhaust structure, one end of the exhaust structure is arranged from the end face of the positioning end to the guide end along the axial direction of the cylindrical pin, and the length of the exhaust structure is 1/2-3/4 of the length of the cylindrical pin; and guide chamfers are arranged at two ends of the cylindrical pin.

Furthermore, the exhaust mechanism is an exhaust groove uniformly distributed on the surface of the cylindrical pin, and the number of the exhaust grooves is 4, and the exhaust grooves are arranged along the axial direction of the cylindrical pin.

Furthermore, the width of the exhaust groove is 0.8-1.1 mm, and the depth is 0.08-0.11 mm.

Further, the width of exhaust groove is 1mm, and the depth is 0.1 mm.

Further, the exhaust mechanism is a T-shaped cavity; the T-shaped cavity comprises a central hole formed in the cylindrical pin and through holes arranged along the radial direction of the cylindrical pin, and the top of the central hole is connected with the through holes and communicated with the through holes.

Further, the diameter of the central bore is larger than the diameter of the perforations.

Further, the length of the exhaust structure is 2/3-3/4 of the length of the cylindrical pin.

Compared with the prior art, the utility model has the advantages that: the purpose of designing four symmetrically distributed exhaust grooves is as follows: the air in the spare part pin hole can be followed four air discharge ducts and automatically discharged when guaranteeing the cylindric lock assembly, prevents to cause the cylindric lock assembly not in place because of the air in the no air discharge pin hole is by the compression resistance. In the embodiment, the length of the exhaust groove is 12mm and is more than half of the length of the cylindrical pin, namely 22mm, so that after the cylindrical pin is assembled, part of the exhaust groove is arranged outside the pin hole, and air can smoothly enter the pin hole through the exhaust groove during disassembly. When part of the cylindrical pins needing to be reworked and removed are used, the four grooves of the cylindrical pins can guide air into the pin holes, so that the pin holes are prevented from being in a vacuum state, and the pins are not influenced by the vacuum of the pin holes and are easy to pull out; when the exhaust structure of the T-shaped cavity is arranged, one end of the T-shaped cavity is positioned at the bottom of the pin hole of the first component, the other end of the T-shaped cavity is positioned about 1/2 of the depth of the pin hole of the second component, and when the exhaust structure is connected and used, the pin hole of the second component plays a certain air resistance role.

Drawings

Fig. 1 is a schematic structural view of the present invention.

FIG. 2 is a view of another embodiment of a cylindrical pin according to the present invention.

Fig. 3 is a left side view of fig. 2.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the utility model or its application.

Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein like reference numerals refer to like parts, unless otherwise specified.

The cylindrical pin capable of preventing stagnation and being easily pulled out in assembling as shown in FIG. 1 comprises a first component 1, a second component 2 and a cylindrical pin 3, wherein the first component 1 and the second component 2 are provided with pin holes corresponding to each other; the cylindrical pin 3 is divided into a positioning end and a guiding end, and a pin hole of the first component 1 is a blind hole and is in interference fit with the positioning end; the guide end is connected with the pin hole of the second component 2. The cylindrical pin 3 is provided with an exhaust structure, one end of the exhaust structure is arranged from the end face of the positioning end to the guide end along the axial direction of the cylindrical pin 3, and the length of the exhaust structure is 1/2-3/4 of the length of the cylindrical pin 3; and guide chamfers are arranged at two ends of the cylindrical pin.

Specifically, the exhaust mechanism is a T-shaped cavity. Specifically, the T-shaped cavity comprises a central hole 5 arranged on the cylindrical pin 3, and a through hole 4 arranged along the radial direction of the cylindrical pin 3. The top of the central hole 5 and the middle of the through hole 4 are connected and communicated with each other, so that a T-shaped cavity is formed.

Referring to fig. 2 to 3, in one embodiment of the exhaust mechanism in the above technical solution, the exhaust mechanism is 4 exhaust grooves 6 uniformly distributed on the surface of the cylindrical pin. The width of the exhaust duct 6 is 0.8 to 1.1mm, and the depth thereof is 0.08 to 0.11 mm. Preferably, the width of the air discharge groove 6 is 1mm and the depth is 0.1 mm.

Generally, when two parts of the cylindrical pin are positioned, the two parts respectively account for half of the length of the cylindrical pin, the exhaust mechanism is 1/2-3/4 of the cylindrical pin, the number of the parts of the exhaust mechanism positioned on the two parts is large, and the stress strength difference of the cylindrical pin on the two parts is small. When the exhaust structure of the T-shaped cavity is arranged, one end of the T-shaped cavity is located at the bottom of the pin hole of the first component, the other end of the T-shaped cavity is located about 1/2 of the depth of the pin hole of the second component, and when the exhaust structure is used in a connecting mode, the pin hole of the second component plays a certain air blocking role.

Those skilled in the art will recognize that numerous variations are possible in light of the above description, and therefore the examples and drawings are merely intended to describe one or more specific embodiments.

While there has been described and illustrated what are considered to be example embodiments of the present invention, it will be understood by those skilled in the art that various changes and substitutions may be made therein without departing from the spirit of the utility model. In addition, many modifications may be made to adapt a particular situation to the teachings of the present invention without departing from the central concept described herein. Therefore, it is intended that the utility model not be limited to the particular embodiments disclosed, but that the utility model will include all embodiments and equivalents falling within the scope of the utility model.

Claims

1. The utility model provides an assembly prevents that stagnation is easily pulled out cylindric lock which characterized in that: the device comprises a first component, a second component and a cylindrical pin, wherein the first component and the second component are provided with pin holes corresponding to each other; the cylindrical pin is divided into a positioning end and a guiding end, and a pin hole of the first component is a blind hole and is in interference fit with the positioning end; the guide end is connected with the pin hole of the second component; the cylindrical pin is provided with an exhaust structure, one end of the exhaust structure is arranged from the end face of the positioning end to the guide end along the axial direction of the cylindrical pin, and the length of the exhaust structure is 1/2-3/4 of the length of the cylindrical pin; and guide chamfers are arranged at two ends of the cylindrical pin.

2. The assembled stagnation resistant easy extraction cylinder pin of claim 1, wherein: the exhaust mechanism is 4 exhaust grooves uniformly distributed on the surface of the cylindrical pin and arranged along the axial direction of the cylindrical pin.

3. The assembled stagnation resistant easy extraction cylinder pin of claim 2, wherein: the width of the exhaust groove is 0.8-1.1 mm, and the depth is 0.08-0.11 mm.

4. A cylindrical pin for assembling a drag resistant pullout prevention as claimed in claim 3 wherein: the width of exhaust groove is 1mm, and the degree of depth is 0.1 mm.

5. The assembled stagnation resistant easy extraction cylinder pin of claim 1, wherein: the exhaust mechanism is a T-shaped cavity; the T-shaped cavity comprises a central hole formed in the cylindrical pin and through holes arranged along the radial direction of the cylindrical pin, and the top of the central hole is connected with the through holes and communicated with the through holes.

6. The assembled stagnation resistant easy extraction cylinder pin of claim 5, wherein: the diameter of the central hole is larger than the diameter of the perforation.

7. The assembled stagnation resistant easy extraction cylinder pin of claim 1, wherein: the length of the exhaust structure is 2/3-3/4 of the length of the cylindrical pin.