CN213744374U

CN213744374U - Positioning pin and connecting structure

Info

Publication number: CN213744374U
Application number: CN202022219707.5U
Authority: CN
Inventors: 崔凯; 王晓楠; 董梁; 杨斌; 郝玉亭
Original assignee: Weichai Power Co Ltd; Linde Hydraulics China Co Ltd
Current assignee: Weichai Power Co Ltd; Linde Hydraulics China Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-07-20
Anticipated expiration: 2030-09-30

Abstract

The utility model relates to a connecting piece technical field specifically discloses a locating pin and connection structure, and this locating pin includes the first body of selling, is equipped with spiral helicine off-load groove on the outer peripheral face of the first body of selling, the first body of selling be used for with the blind hole interference fit of first work piece, and the one end in off-load groove can communicate with the blind hole, the other end and external intercommunication, the off-load groove can be with the gas or the liquid discharge blind hole in the blind hole. Through set up the off-load groove at the outer peripheral face of first round pin body, when inserting the blind hole through first round pin body, can discharge gas or liquid in the blind hole, can not lead to the pressure increase in the blind hole, and then guarantee that first round pin body and first work piece are installed and target in place. Meanwhile, the unloading groove is spiral, and the first pin body is convenient to assemble into the blind hole along the spiral direction.

Description

Positioning pin and connecting structure

Technical Field

The utility model relates to a connecting piece technical field especially relates to a locating pin and connection structure.

Background

The positioning pin is a positioning standard component widely applied in the automobile and machinery industry. Specifically, the positioning pin realizes fixed mounting by utilizing the cooperation of a cylindrical pin body and a positioning mounting hole. Because the locating pin adopts interference fit (also called tight fit) with the cooperation of location mounting hole, this kind of complex fixed mode is to the mounting hole of non-through-hole, easily forms the airtight air chamber of inner space, makes the air or the liquid of its inner space unable discharge to lead to the installation inconvenient, and even if install the back, because the atmospheric pressure increase of inner space, produce the effort of extrapolating to the locating pin, long-time the use leads to locating pin and work piece to throw off easily, influences sealing performance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the utility model provides a locating pin and connection structure to when solving locating pin and the mounting hole tight fit of work piece non-through-hole among the correlation technique, be difficult to the problem of installation.

In one aspect, the utility model provides a locating pin, the locating pin includes the first round pin body, be equipped with the off-load groove on the outer peripheral face of the first round pin body, the off-load groove is the heliciform, the first round pin body be used for with the blind hole interference fit of first work piece, just the one end of off-load groove can with the blind hole intercommunication, the other end and external intercommunication, so that the off-load groove can with gas or liquid discharge in the blind hole.

As a preferred technical scheme of the positioning pin, one axial end of the first pin body is provided with a guide inclined plane, and the guide inclined plane is used for guiding the first pin body to enter the blind hole.

As a preferable embodiment of the positioning pin, an outer diameter of the first pin body is larger than an outer diameter of the second pin body, the outer diameter of the first pin body is larger than an inner diameter of the mounting hole, and a stepped surface is formed between the first pin body and the second pin body.

As a preferable technical scheme of the positioning pin, one end of the unloading groove penetrates through the guide inclined surface, and the other end of the unloading groove penetrates through the step surface.

As a preferable technical scheme of the positioning pin, the second pin body is in clearance fit with the mounting hole.

As a preferable technical solution of the positioning pin, the second pin body and the first pin body are coaxially disposed.

As a preferable technical scheme of the positioning pin, a through hole penetrating through the first pin body and the second pin body is formed in the positioning pin.

As a preferred technical scheme of the positioning pin, the number of the unloading grooves is two, and the two unloading grooves are arranged in a double-helix manner.

On the other hand, the utility model provides a connection structure, including in arbitrary above-mentioned scheme locating pin and first work piece.

As a preferable technical scheme of the connecting structure, the connecting structure further comprises a second workpiece, the positioning pin further comprises a second pin body arranged on the first pin body, and the second pin body is used for being in clearance fit with a mounting hole in the second workpiece;

the outer diameter of the first pin body is larger than the inner diameter of the mounting hole, a step surface is formed between the first pin body and the second pin body, the second workpiece can be abutted against the step surface, and the first workpiece is abutted against the second workpiece.

The utility model has the advantages that:

the utility model provides a locating pin and connection structure, this locating pin include the first body of selling, are equipped with spiral helicine off-load groove on the outer peripheral face of the first body of selling, the first body of selling be used for with the blind hole interference fit of first work piece, and the one end in off-load groove can communicate with the blind hole, the other end and external intercommunication, the off-load groove can be with the gas or the liquid discharge blind hole in the blind hole. Through set up the off-load groove at the outer peripheral face of first round pin body, when inserting the blind hole through first round pin body, can discharge gas or liquid in the blind hole, can not lead to the pressure increase in the blind hole, and then guarantee that first round pin body and first work piece are installed and target in place. Meanwhile, the unloading groove is spiral, and the first pin body is convenient to assemble into the blind hole along the spiral direction.

Drawings

Fig. 1 is a schematic structural view of a positioning pin in an embodiment of the present invention;

FIG. 2 is a front view of the locating pin of the embodiment of the present invention;

fig. 3 is a schematic structural diagram of a connection structure in an embodiment of the present invention.

In the figure:

10. a first pin body; 11. an unloading slot; 13. a guide slope;

20. a second pin body; 21. a step surface;

30. a first workpiece; 31. blind holes;

40. a second workpiece; 41. and (7) installing holes.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

The present embodiment provides a connecting structure that connects two workpieces by positioning pins. Specifically, as shown in fig. 1 to 3, the connection structure includes a positioning pin and a first workpiece 30, the positioning pin includes a first pin body 10, a spiral relief groove 11 is provided on an outer circumferential surface of the first pin body 10, the first pin body 10 is configured to be in interference fit with a blind hole 31 of the first workpiece 30, and one end of the relief groove 11 can communicate with the blind hole 31, and the other end communicates with the outside, so that the relief groove 11 can discharge gas or liquid in the blind hole 31 out of the blind hole 31. By providing the unloading groove 11 on the outer peripheral surface of the first pin body 10, when the first pin body 10 is inserted into the blind hole 31, gas or liquid in the blind hole 31 can be discharged, so that the pressure in the blind hole 31 is not increased, and the first pin body 10 and the first workpiece 30 are ensured to be installed in place. Meanwhile, the unloading groove 11 is spiral, and the first pin body 10 is convenient to assemble into the blind hole 31 along the spiral direction. In other embodiments, the relief groove 11 may be a straight groove.

Optionally, one axial end of the first pin body 10 is provided with a guide slope 13, and the guide slope 13 is used for guiding the first pin body 10 into the blind hole 31. The guide ramp 13 is tapered, and it will be appreciated that the outer diameter of the end of the guide ramp 13 is smaller than the inner diameter of the blind bore 31, which guides the insertion of the first pin body 10 into the first workpiece 30. Preferably, one end of the relief groove 11 penetrates the guide slope 13, and the other end of the relief groove 11 penetrates the step surface 21.

Optionally, the positioning pin further comprises a second pin body 20 disposed on the first pin body 10, and the connecting structure further comprises a second workpiece 40, wherein the second pin body 20 is used for being inserted into a mounting hole 41 of the second workpiece 40. With this arrangement, the first workpiece 30 and the second workpiece 40 can be connected by the positioning pins, and the relative stability of the positions of the first workpiece 30 and the second workpiece 40 can be ensured. The mounting hole 41 may be a blind hole or a through hole, and the embodiment exemplifies that the mounting hole 41 is a through hole.

Alternatively, the outer diameter of the first pin body 10 is larger than the outer diameter of the second pin body 20, and the outer diameter of the first pin body 10 is larger than the inner diameter of the mounting hole 41. With this arrangement, a stepped surface 21 is formed between the first pin body 10 and the second pin body 20. The relative position of the second workpiece 40 and the positioning pin can be limited by the step surface 21, and the positioning pin is in interference fit with the first workpiece 30, so that the relative position of the first workpiece 30 and the positioning pin can be limited by inserting the positioning pin into the blind hole 31 to limit the relative position of the first workpiece 30 and the positioning pin, and further the relative position of the first workpiece 30 and the second workpiece 40 can be limited. Preferably, the second workpiece 40 can abut against the step surface 21, and the first workpiece 30 abuts against the second workpiece 40. The arrangement ensures that the first workpiece 30 and the second workpiece 40 are stably attached.

Optionally, the second pin body 20 is a clearance fit with the mounting hole 41. So that when the second pin body 20 is inserted into the mounting hole 41, gas or liquid in the mounting hole 41 can be discharged from the gap between the second pin body 20 and the mounting hole 41. In other embodiments, the second pin 20 may also be interference fit with the mounting hole 41.

Alternatively, the first pin body 10 and the second pin body 20 are both cylindrical, and the first pin body 10 and the second pin body 20 are coaxially disposed. In other embodiments, either one of the first pin body 10 and the second pin body 20 may be further provided in a triangular prism shape, a quadrangular prism shape, or the like.

Optionally, the positioning pin is provided with a through hole (not shown in the drawings) penetrating through the first pin body 10 and the second pin body 20. When the unloading groove 11 is blocked, in the process that the first pin body 10 is loaded into the blind hole 31, gas or liquid in the blind hole 31 can be discharged through the through hole, so that the through hole and the unloading groove 11 can form redundant protection. As an alternative, the number of the relief grooves 11 is two, and the two relief grooves 11 are arranged in a double helix. Of course, the two relief grooves 11 may be arranged at intervals along the circumferential direction of the first pin 10. The two unloading grooves 11 can also prevent one of the unloading grooves 11 from being blocked, which affects the unloading effect. It should be noted that the number of the relief grooves 11 may be two or more.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The positioning pin is characterized by comprising a first pin body (10), wherein an unloading groove (11) is formed in the peripheral surface of the first pin body (10), the unloading groove (11) is spiral, the first pin body (10) is used for being in interference fit with a blind hole (31) of a first workpiece (30), one end of the unloading groove (11) can be communicated with the blind hole (31), the other end of the unloading groove is communicated with the outside, and therefore gas or liquid in the blind hole (31) can be discharged out of the blind hole (31) through the unloading groove (11).

2. The dowel according to claim 1, wherein the first dowel body (10) is provided at one axial end with a guide bevel (13), the guide bevel (13) being used to guide the first dowel body (10) into the blind hole (31).

3. The dowel according to claim 2, further comprising a second dowel body (20) disposed on the first dowel body (10), the second dowel body (20) being adapted to mate with a mounting hole (41) in a second workpiece (40).

4. The locating pin according to claim 3, characterized in that the outer diameter of the first pin body (10) is greater than the outer diameter of the second pin body (20) and the outer diameter of the first pin body (10) is greater than the inner diameter of the mounting hole (41), a step surface (21) being formed between the first pin body (10) and the second pin body (20).

5. The dowel according to claim 4, wherein one end of the relief groove (11) penetrates the guide slope (13), and the other end of the relief groove (11) penetrates the step surface (21).

6. The dowel according to claim 3, wherein the second dowel body (20) and the first dowel body (10) are coaxially disposed.

7. The dowel according to claim 3, wherein a through hole is provided through the first pin body (10) and the second pin body (20).

8. The locating pin according to claim 1, characterized in that the number of relief grooves (11) is two, and the two relief grooves (11) are arranged in a double helix.

9. A joint structure, characterized by comprising the positioning pin according to any one of claims 1 to 8, and a first workpiece (30).

10. The connection according to claim 9, characterized in that it further comprises a second workpiece (40), said pin further comprising a second pin body (20) provided on said first pin body (10), said second pin body (20) being adapted to be clearance fitted with a mounting hole (41) in the second workpiece (40);

the outer diameter of the first pin body (10) is larger than the inner diameter of the mounting hole (41), a step surface (21) is formed between the first pin body (10) and the second pin body (20), the second workpiece (40) can be abutted against the step surface (21), and the first workpiece (30) is abutted against the second workpiece (40).