CN211951112U - Positioning pin - Google Patents

Abstract

The utility model provides a positioning pin, relates to fastener technical field, including the round pin body, has seted up the air channel by the terminal surface of round pin body first end to the side of the axle, and the first end of round pin body is used for inserting the pinhole of mechanical faying face, and the second end of round pin body exposes outside the pinhole, and the length of air channel is less than the degree of depth of pinhole to make the air channel holding in the pinhole. The positioning pin can be conveniently disassembled and assembled.

Description

Positioning pin

Technical Field

The utility model relates to a fastener technical field particularly, relates to a locating pin.

Background

At present, in the engineering machinery industry, for example, in large equipment systems such as excavators, cranes, rotary drilling rigs and the like, positioning and installation are often performed between parts through positioning pins, so that the purpose of limiting the degree of freedom of the parts is achieved. Therefore, in the process of assembling parts, the positioning pin needs to have certain self-absorption capacity so as to avoid the falling-off phenomenon in the assembling process.

However, when the parts need to be disassembled for maintenance or analysis, the positioning pin is difficult to pull out under the action of atmospheric pressure, and if the parts and the positioning pin are easily damaged by external force or tools, the parts and the positioning pin are very inconvenient.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a locating pin, the dismouting of can being convenient for.

The embodiment of the utility model is realized like this:

an embodiment of the utility model provides a locating pin, including the round pin body, by the air channel has been seted up to the axial side to the terminal surface of round pin body first end, the first end of round pin body is used for inserting in the pinhole of mechanical faying face, the second end of round pin body expose in outside the pinhole, the length of air channel is less than the degree of depth of pinhole, so that the air channel holding in the pinhole. The positioning pin can be conveniently disassembled and assembled.

Optionally, in a preferred embodiment of the present invention, the vent groove includes a plurality of vent grooves arranged at equal intervals along a circumferential direction of the pin body.

Optionally, in a preferred embodiment of the present invention, the vent groove has a depth less than a radius of the pin body.

Optionally, in a preferred embodiment of the present invention, a plurality of through grooves are further formed along the circumferential direction of the pin body, and the through grooves intersect with the plurality of vent grooves respectively, so that the plurality of vent grooves are communicated with each other.

Optionally, in a preferred embodiment of the present invention, the annular through groove includes a plurality of annular through grooves arranged along an axial direction of the pin body.

Optionally, in a preferred embodiment of the present invention, the plurality of annular through grooves are arranged at equal intervals along the axial direction of the pin body.

Optionally, in a preferred embodiment of the present invention, the depth of the annular groove is less than the radius of the pin body.

Optionally, in a preferred embodiment of the present invention, the bottom of the ventilation groove is a cambered surface.

The utility model discloses beneficial effect includes:

this locating pin includes the round pin body, seted up the air channel to the side of the axle by the terminal surface of round pin body first end, because the locating pin need insert in the pinhole of the mechanical faying face between the part, just can play the effect of restriction part degree of freedom, consequently, the locating pin is when the installation, with the round pin body from the first end of round pin body insert in the pinhole of mechanical faying face, conflict until the terminal surface of round pin body first end and the bottom of pinhole, and the second end of round pin body exposes outside the pinhole this moment, in order to regard as the stress point of locating pin when the maintenance is dismantled. When the end face of the first end of the pin body is abutted against the bottom of the pin hole, the starting point of the vent groove is also abutted against the bottom of the pin hole, and the length of the vent groove is smaller than the depth of the pin hole, so that the end point of the vent groove cannot be exposed out of the pin hole, namely, the vent groove can be accommodated in the pin hole. When the locating pin is disassembled, the pin body is only required to be pulled out from the second end of the pin body to the end point of the vent groove to be exposed out of the pin hole, the end face of the first end of the pin body can be communicated with the external atmospheric pressure through the effect of the vent groove, so that the resistance in the disassembling process is reduced, and the locating pin is convenient to disassemble. When the locating pin is in the initial stage of installation or dismantlement, because the terminal point of air channel can not expose outside the pinhole, under the effect of outside atmospheric pressure, can make the locating pin have certain ability of inhaling certainly to avoid the locating pin to take place the obscission, and then make the locating pin be convenient for install.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a positioning pin according to an embodiment of the present invention;

fig. 2 is a second schematic structural view of a positioning pin according to an embodiment of the present invention;

fig. 3 is an installation schematic diagram of the positioning pin provided by the embodiment of the present invention.

Icon: 100-positioning pins; 10-a pin body; 11-a vent channel; 200-mechanical joint face.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

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 the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be internal to both elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

Currently, the positioning pin 100 provided in this embodiment has a cylindrical structure similar to the positioning pin in the prior art, so that the positioning pin 100 (or the pin body 10) has two end portions with circular end faces and a curved surface (or a shaft side surface) connecting the two end faces. It is to be noted that, in the following description, for the sake of convenience of distinction, both end portions of the pin body 10 are referred to as a first end of the pin body 10 and a second end of the pin body 10, respectively, and cannot be understood as indicating or implying relative importance.

Specifically, referring to fig. 1 to 3, the present embodiment provides a positioning pin 100, which includes a pin body 10, wherein a vent groove 11 is formed from an end surface of a first end of the pin body 10 to an axial side surface, the first end of the pin body 10 is used for being inserted into a pin hole of a mechanical joint surface 200, a second end of the pin body 10 is exposed outside the pin hole, and a length of the vent groove 11 is smaller than a depth of the pin hole, so that the vent groove 11 is accommodated in the pin hole. The positioning pin 100 can be easily attached and detached.

First, as shown in fig. 1 and 2, the vent groove 11 is a groove that is formed in the pin body 10 and extends from the end surface of the first end of the pin body 10 to the axial side of the pin body 10, that is, the end surface of the first end of the pin body 10 can be regarded as the starting point of the vent groove 11, and the point on the axial side of the pin body 10 can be regarded as the end point of the vent groove 11, and since the point on the axial side is not easy to describe, the limitation is described here by the distance between the starting point of the vent groove 11 and the end point of the vent groove 11 (i.e., the length of the vent groove 11) being smaller than the depth of the pin hole.

Secondly, since the positioning pin 100 needs to be inserted into the pin hole of the mechanical joint surface 200 between the components to play a role in limiting the degree of freedom of the components, when the positioning pin 100 provided by this embodiment is used and installed, the pin body 10 is inserted into the pin hole of the mechanical joint surface 200 from the first end of the pin body 10 until the end surface of the first end of the pin body 10 collides with the bottom of the pin hole, and at this time, the second end of the pin body 10 is exposed out of the pin hole to serve as a stress point when the positioning pin 100 is repaired and disassembled.

Thirdly, as shown in fig. 3, the above-mentioned assembling and disassembling process is similar to the assembling and disassembling process of the positioning pin in the prior art, and the main difference is that the pin body 10 provided in this embodiment is provided with the vent groove 11, and the length of the vent groove 11 is smaller than the depth of the pin hole, so that when the end surface of the first end of the pin body 10 abuts against the bottom of the pin hole, the starting point of the vent groove 11 also abuts against the bottom of the pin hole, and since the length of the vent groove 11 is smaller than the depth of the pin hole, the end point of the vent groove 11 is not exposed outside the pin hole, that is, the vent groove 11 can be accommodated in.

Fourthly, the benefit of design like this lies in, when locating pin 100 is dismantling, only needs to extract round pin body 10 from the second end of round pin body 10 to the terminal point of air channel 11 and expose outside the pinhole, can make the terminal surface and the external atmospheric pressure intercommunication of round pin body 10 first end through the effect of air channel 11 to resistance when reducing the dismantlement, and then make locating pin 100 convenient to detach. When the positioning pin 100 is installed or detached at an initial stage, the end point of the vent groove 11 is not exposed outside the pin hole, so that the positioning pin 100 has certain self-absorption capacity under the action of external atmospheric pressure, the phenomenon that the positioning pin 100 falls off is avoided, and the positioning pin 100 is convenient to install.

In summary, the positioning pin 100 includes a pin body 10, and a vent groove 11 is formed from an end surface of a first end of the pin body 10 to an axial side surface, and the positioning pin 100 needs to be inserted into a pin hole of a mechanical joint surface 200 between components to play a role of limiting the degree of freedom of the components, so that when the positioning pin 100 is installed, the pin body 10 is inserted into the pin hole of the mechanical joint surface 200 from the first end of the pin body 10 until the end surface of the first end of the pin body 10 abuts against the bottom of the pin hole, and at this time, a second end of the pin body 10 is exposed out of the pin hole to serve as a stress point of the positioning pin 100 during maintenance and disassembly. When the end surface of the first end of the pin body 10 abuts against the bottom of the pin hole, the starting point of the vent groove 11 also abuts against the bottom of the pin hole, and since the length of the vent groove 11 is smaller than the depth of the pin hole, the end point of the vent groove 11 is not exposed outside the pin hole, that is, the vent groove 11 can be accommodated in the pin hole. When the locating pin 100 is disassembled, the pin body 10 is only required to be pulled out from the second end of the pin body 10 to the end point of the vent groove 11 to be exposed out of the pin hole, the end face of the first end of the pin body 10 can be communicated with the external atmospheric pressure through the effect of the vent groove 11, so that the resistance in the disassembling process is reduced, and the locating pin 100 is convenient to disassemble. When the positioning pin 100 is installed or detached at an initial stage, the end point of the vent groove 11 is not exposed outside the pin hole, so that the positioning pin 100 has certain self-absorption capacity under the action of external atmospheric pressure, the phenomenon that the positioning pin 100 falls off is avoided, and the positioning pin 100 is convenient to install.

As shown in fig. 1, in the present embodiment, the vent grooves 11 include a plurality of, for example, four, such that the external atmospheric pressure can communicate with the end surface of the first end of the pin body 10 through the plurality of vent grooves 11, thereby further reducing resistance when the positioning pin 100 is detached, and further making the positioning pin 100 easier to detach. Wherein, a plurality of air channels 11 can be arranged along the circumference direction of round pin body 10 at equal intervals to improve the stability of locating pin 100 in the dismouting in-process, avoid appearing rocking or phenomenon such as slope and the dismouting that leads to inconvenient.

As shown in fig. 1, in order to secure the strength required for the positioning pin 100, in the present embodiment, the depth of the vent groove 11 is smaller than the radius of the pin body 10, wherein the depth of the vent groove 11 refers to the vertical distance between the groove bottom of the vent groove 11 and the axial side surface of the pin body 10. It should be noted that if the depth of the vent groove 11 is too small, the end surface of the first end of the pin body 10 may not be well communicated with the external atmosphere, and the resistance of the positioning pin 100 during the detachment may not be significantly reduced; if the depth of the vent groove 11 is too large, the strength of the positioning pin 100 may be reduced, which may affect the firmness and stability of the positioning and installation between the parts. Those skilled in the art can make reasonable design and selection according to actual needs, and is not limited in particular here.

As shown in fig. 1, in order to ensure reliable positioning of the positioning pin 100, in the present embodiment, the contact area of the pin body 10 is greater than or equal to half the circumferential area of the pin hole. The contact area of the pin body 10 refers to a partial area of a curved surface (or a shaft side surface) connecting the first end of the pin body 10 and the second end of the pin body 10, which is left after the vent groove 11 is formed, and the circumferential area of the pin hole refers to an area of an inner wall surface of the pin hole (the pin hole is also cylindrical and has a curved surface).

As shown in fig. 1, in the present embodiment, the bottom of the ventilation slot 11 is a cambered surface, and in this case, the cross section of the ventilation slot 11 is a circular arc, but in other embodiments, the bottom of the ventilation slot 11 may also be a plane, and in this case, the cross section of the ventilation slot 11 is approximately trapezoidal. The above specific shape of the vent groove 11 can be reasonably designed and selected by those skilled in the art according to practical requirements and processing difficulty, and is only illustrated here by way of example and is not intended to limit the practical structure of the vent groove 11.

In the prior art, when the positioning pin is installed, a lubricant such as grease is generally applied to the surface of the positioning pin, so as to avoid the blockage of the vent grooves and influence the communication effect between the external atmospheric pressure and the end surface of the first end of the pin body 10, preferably, a ring through groove can be further formed in the circumferential direction of the pin body 10, and the ring through groove is respectively intersected with the plurality of vent grooves 11, so that the plurality of vent grooves 11 are communicated. Because the length of the vent groove 11 is smaller than the depth of the pin hole, the edge of the annular through groove near the first end of the pin body 10 is not exposed outside the pin hole, and the edge of the annular through groove near the second end of the pin body 10 is also not exposed outside the pin hole, i.e. the annular through groove can be accommodated in the pin hole.

On the basis that the vent groove 11 has been seted up at round pin body 10, set up the annular through groove on round pin body 10 again, and make the annular through groove be linked together with vent groove 11, the benefit of design lies in, when locating pin 100 is dismantling, round pin body 10 is pulled out to the terminal point of vent groove 11 from the second end of round pin body 10 and is exposed outside the pinhole, can make the terminal surface and the outside atmospheric pressure intercommunication of round pin body 10 first end through the effect of vent groove 11, continue to pull out to the edge that the annular is led to the groove and is exposed outside the pinhole, can pass through the mutually supporting between annular through groove and the vent groove 11, make the terminal surface intercommunication effect of outside atmospheric pressure and round pin body 10 first end show and improve, thereby obviously reduce the resistance when locating pin 100 dismantles, and then make locating pin 100 dismantle more laborsavingly.

Alternatively, the annular groove includes a plurality of annular grooves arranged in the axial direction of the pin body 10. The plurality of annular through grooves may be arranged at equal intervals or may be arranged at unequal intervals along the axial direction of the pin body 10, for example, along the axial direction of the pin body 10, the closer two adjacent annular through grooves are to one end (the first end or the second end) of the pin body 10, the smaller the distance between the two adjacent annular through grooves is, and the largest distance between the two adjacent annular through grooves at the other end (the second end or the first end) of the pin body 10 is; alternatively, the closer two adjacent annular through grooves are to the two end portions (the first end and the second end) of the pin body 10 in the axial direction of the pin body 10, the smaller the distance therebetween, and the largest the distance therebetween is between the adjacent two annular through grooves located at the intermediate positions of the two end portions of the pin body 10.

To ensure the required strength of the locating pin 100, the depth of the annular channel also needs to be less than the radius of the pin body 10. The depth of the annular through groove refers to a vertical distance between the groove bottom of the annular through groove and the axial side surface of the pin body 10. It should be noted that if the depth of the annular through groove is too small, the communication effect between the end surface of the first end of the pin body 10 and the external atmosphere may be poor, and the resistance of the positioning pin 100 during detachment may not be significantly reduced; if the depth of the annular groove is too large, the strength of the locating pin 100 may be reduced, and the firmness and stability of the locating installation between the parts may be affected. Those skilled in the art can make reasonable design and selection according to actual needs, and is not limited in particular here.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A positioning pin is characterized by comprising a pin body, wherein a vent groove is formed in the axial side surface of the end surface of the first end of the pin body, the first end of the pin body is used for being inserted into a pin hole of a mechanical joint surface, the second end of the pin body is exposed out of the pin hole, and the length of the vent groove is smaller than the depth of the pin hole, so that the vent groove is accommodated in the pin hole.

2. The dowel of claim 1, wherein the vent grooves include a plurality of vent grooves arranged at equal intervals in a circumferential direction of the dowel body.

3. The locating pin of claim 2, wherein the vent groove has a depth less than a radius of the pin body.

4. The locating pin according to claim 2, characterized in that an annular through groove is further opened in a circumferential direction of the pin body, and the annular through groove intersects with the plurality of vent grooves, respectively, so that the plurality of vent grooves communicate with each other.

5. The locating pin according to claim 4, characterized in that the annular through groove includes a plurality of which are arranged in an axial direction of the pin body.

6. The locating pin of claim 5, wherein a plurality of the annular through slots are arranged at equal intervals in an axial direction of the pin body.

7. The locating pin of claim 5, wherein the depth of the annular channel is less than the radius of the pin body.

8. The locating pin of claim 1, wherein the bottom of the vent slot is cambered.

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