CN217703078U

CN217703078U - Telescopic pin positioning fixture

Info

Publication number: CN217703078U
Application number: CN202221330924.4U
Authority: CN
Inventors: 段晗星
Original assignee: Xiangyang Meilixin Science & Technology Co ltd
Current assignee: Xiangyang Meilixin Science & Technology Co ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2022-11-01
Anticipated expiration: 2032-05-30

Abstract

The utility model discloses a telescopic pin positioning clamp, which relates to the technical field of positioning pins and comprises a main body part, a positioning pin and a retaining mechanism, wherein the main body part is provided with a through hole; the positioning pin is arranged in the through hole and can stretch out and draw back in the through hole, the positioning pin comprises a connecting end and a positioning end, and the positioning end is in a frustum shape which shrinks inwards along the extending direction of the positioning pin; the holding mechanism is connected with the connecting end of the positioning pin and is used for enabling the positioning end to extend out of the through hole when external force is not applied. Through setting up the locating pin into the frustum shape that can stretch out in the through-hole of main part, and stretch out the location end of through-hole for following the inside shrink of direction of stretching out to be connected with retaining mechanism, thereby can make the locating pin adaptation have the work piece of the locating hole or the constant head tank in different apertures, when having solved the work piece in the locating hole or the constant head tank in different apertures of location, need change corresponding locating pin or secondary and punch and cause the problem that machining efficiency is low.

Description

Telescopic pin positioning fixture

Technical Field

The utility model relates to a locating pin technical field, concretely relates to telescopic pin positioning fixture.

Background

When the machine body is formed by connecting a plurality of parts, and each part needs to keep a precise position during machining and assembling, a positioning pin needs to be used for positioning.

When the positioning pin is used for positioning, the workpiece hole is used as a positioning reference, so that the pin head of the positioning pin is required to be matched with the aperture of the workpiece hole, and if the workpiece has no positioning hole or the size of the positioning hole is not suitable for the pin, the positioning hole needs to be opened first and then positioning is carried out, so that the working procedures are increased, and the processing efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

To the defect that exists among the prior art, the utility model aims to provide a flexible pin positioning fixture to solve the problem of the unable unified adaptation in pin and the different work piece holes among the prior art.

In order to achieve the above purpose, the utility model adopts the technical proposal that:

there is provided a telescopic pin positioning jig comprising:

a main body part provided with a through hole;

the positioning pin is arranged in the through hole and can stretch out and draw back in the through hole, the positioning pin comprises a connecting end and a positioning end, and the positioning end is in a frustum shape which shrinks inwards along the extending direction of the positioning pin;

and the holding mechanism is connected with the connecting end of the positioning pin and is used for enabling the positioning end to extend out of the through hole when no external force is applied.

In some alternative embodiments, the retaining mechanism comprises:

the pin bush is sleeved outside the positioning pin and can slide in the through hole;

one end of the spring is abutted against the connecting end of the positioning pin;

and a connecting member abutting against the other end of the spring for providing a reaction force for restoring the spring to the extended state.

In some optional embodiments, the positioning pin further comprises a driving member connected to the connecting member for driving the retaining mechanism to move in the through hole and axially move the positioning pin in the through hole.

In some optional embodiments, the connecting member includes a first buckle and a second buckle connected to each other, and the first buckle is connected to the pin sleeve and abuts against the other end of the spring; the second buckle is connected with the driving piece.

In some optional embodiments, the first buckle and the second buckle are connected with each other by means of a buckle.

In some optional embodiments, the driving member is a telescopic cylinder, and the second fastener is in threaded connection with a telescopic rod of the telescopic cylinder.

In some optional embodiments, the pin sleeve is provided with an accommodating cavity and sleeved outside the positioning pin through the accommodating cavity, and the pin sleeve is clamped with the connecting end of the positioning pin.

In some alternative embodiments, the outer side of the connecting end of the positioning pin is provided with an annular protrusion;

the pin sleeve is internally provided with a stepped hole, and the diameter of the annular protrusion is larger than that of the small hole in the stepped hole and smaller than that of the large hole in the stepped hole.

In some alternative embodiments, the connection end of the positioning pin is provided with a protrusion extending toward the connection member, one end of the connection member is located in the accommodation cavity and is provided with a blind hole, one end of the spring is clamped on the protrusion, and the other end of the spring is located in the blind hole.

In some alternative embodiments, the end surface of the main body portion, through which the positioning pin passes, is horizontal to a radial surface of the positioning pin, and the end surface is used for placing a workpiece.

Compared with the prior art, the utility model has the advantages of: through setting up the locating pin to the through-hole that can be at the main part in the shrink, and stretch out the frustum shape of locating end for following the inside shrink of direction of stretching out of through-hole, and be connected with retaining mechanism, make the locating pin stretch out the through-hole under natural state, and when locating end atress, the locating pin can be to the interior shrink removal that contracts of through-hole, thereby can make the locating pin adaptation have the work piece of the locating hole or the constant head tank in different apertures, when the aperture size of locating hole or constant head tank is different, the length that the locating end of locating pin stretches into is different, when the work piece at the locating hole or the constant head tank in the different apertures of location has been solved, need to change corresponding locating pin or secondary and punch and cause the problem that machining efficiency hangs down.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of a positioning fixture for a retractable pin according to the present invention;

fig. 2 is a cross-sectional view of fig. 1.

In the figure: 1. a main body portion; 2. positioning pins; 3. a holding mechanism; 31. a pin bush; 32. a connecting member; 321. a first buckle; 322. a second buckle; 33. a spring; 4. a drive member.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The following describes an embodiment of the positioning clamp for a retractable pin according to the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1, the present application provides a telescopic pin positioning jig comprising: the positioning device comprises a main body part 1, a positioning pin 2 and a holding mechanism 3, wherein the main body part 1 is provided with a through hole; the positioning pin 2 is arranged in the through hole and can stretch out and draw back in the through hole, the positioning pin 2 comprises a connecting end and a positioning end, and the positioning end is in a frustum shape which shrinks inwards along the extending direction of the positioning pin 2; the holding mechanism 3 is connected to the connecting end of the positioning pin 2, and is used to extend the positioning end out of the through hole when no external force is applied.

It can be understood that the positioning pin 2 is disposed in the through hole of the main body 1, and when the positioning pin 2 is not subjected to an external force and is in a natural state, the positioning end of the positioning pin extends out of the through hole, and when the positioning pin 2 is subjected to an external force in a direction toward the through hole, the positioning pin 2 moves into the through hole and returns to the natural state after the external force is removed.

Therefore, when the positioning holes or positioning grooves of different workpieces are placed on the main body part 1 and positioned by the positioning pins 2, the positioning ends of the positioning pins 2 are frustum-shaped, so that the positioning pins can extend into the positioning holes or positioning grooves with different hole diameters, and the hole diameter range matched with the positioning pins 2 is the taper of the frustum-shaped positioning ends. For example, when the aperture of the positioning hole or the positioning groove of the workpiece is small, the length of the positioning pin 2 extending into the positioning hole or the positioning groove is short, and when the aperture of the positioning hole or the positioning groove of the workpiece is large, the length of the positioning pin 2 extending into the positioning hole or the positioning groove is long.

It should be noted that, in order to improve the positioning accuracy, the positioning pin 2 is preferably a cylinder, and the major diameter of the positioning end should not be smaller than the aperture of the workpiece positioning hole or the positioning groove, so as to avoid the occurrence of a gap when the positioning end extends into the positioning hole or the positioning groove of the workpiece, which causes inaccurate positioning of the workpiece.

In some alternative embodiments, the retaining mechanism 3 includes a pin sleeve 31, a connecting member 32 and a spring 33, the pin sleeve 31 is sleeved outside the positioning pin 2 and can slide in the through hole; one end of the spring 33 is abutted against the connecting end of the positioning pin 2; the connecting member 32 abuts against the other end of the spring 33 to provide a reaction force for restoring the spring 33 to be elongated.

In this example, the spring 33 is disposed between the positioning pin 2 and the connecting member 32, the spring 33 is a compression spring, when the workpiece is placed on the main body 1 and the positioning pin 2 is aligned with the positioning hole or the positioning groove of the workpiece, the positioning pin 2 moves into the pin sleeve 31 under the abutment of the side wall of the positioning hole or the positioning groove, and the spring 33 is compressed, at this time, under the action of the connecting member 32, the spring 33 has a reaction force of recovering the extension, so that the positioning end of the positioning pin 2 is engaged with the positioning hole or the positioning groove of the workpiece, thereby positioning the workpiece. Here, the inner diameter of the pin sleeve 31 is adapted to the diameter of the positioning pin 2, the compression and extension directions of the spring 33 are consistent with the moving direction of the positioning pin 2, and the elastic coefficient of the spring 33 can be specifically set according to different needs.

In some alternative embodiments, the telescopic pin positioning fixture further comprises a driving member 4, and the driving member 4 is connected to the connecting member 32 for driving the holding mechanism 3 to move in the through hole and axially move the positioning pin 2 in the through hole.

It will be appreciated that the coupling member 32 is moved by the drive member 4, thereby moving the pin sleeve 31 within the through-hole and moving the spring 33 and the positioning pin 2 together in the through-hole in the axial direction. Therefore, when the positioning pin 2 positions the workpiece accurately, the clamping device and the main body part 1 are used for clamping the workpiece, the driving part 4 pulls the connecting part 32 to move downwards, the positioning pin 2 moves in the through hole until the positioning pin is not clamped with the workpiece, and a punching channel of the workpiece is reserved.

Further, the connecting member 32 includes a first catch 321 and a second catch 322 connected to each other, the first catch 321 is connected to the pin sleeve 31 and abuts against the other end of the spring 33; the second latch 322 is connected to the driving member 4.

Preferably, the first catch 321 and the second catch 322 are connected to each other by a catch.

In this example, the driving member 4 is a telescopic cylinder, and the second buckle 322 is screwed to a telescopic rod of the telescopic cylinder.

The first buckle 321 and the second buckle 322 can facilitate replacement, maintenance and service of the post positioning clamp.

In some alternative embodiments, the pin sleeve 31 is provided with a receiving cavity and sleeved outside the positioning pin 2 through the receiving cavity, and the pin sleeve 31 is clamped with the connecting end of the positioning pin 2.

When the link 32 moves in the vertical direction, the positioning pin 2 can move in the through-hole together with the link 32 under the action of gravity, but if the positioning pin 2 is placed in a non-vertical state or the connection end of the positioning pin 2 is positioned above the positioning end, an external force by which the positioning pin 2 can move in the through-hole is required. Therefore, the pin bush 31 is clamped with the connecting end of the positioning pin 2, and the positioning pin 2 is driven to move by pulling the pin bush 31.

Further, as shown in fig. 2, an annular protrusion is provided on the outer side of the connection end of the positioning pin 2; the pin sleeve 31 is provided with a stepped hole therein, and the diameter of the annular projection is larger than the diameter of the small hole in the stepped hole and smaller than the diameter of the large hole in the stepped hole.

It can be understood that the annular projection on the positioning pin 2 abuts against the small hole of the stepped hole in the pin sleeve 31, so that the positioning end of the positioning pin 2 can sequentially pass through the small hole from the large hole of the stepped hole and extend out of the main body 1 from the through hole. And through setting up the shoulder hole to make spring 33 stretch out and draw back in the macropore of shoulder hole, not only provide better resilience force for locating pin 2, and avoid spring 33 excessively kick-back and cause elastic fatigue.

Therefore, when the positioning pin 2 is subjected to external force, the positioning pin can move in the accommodating cavity of the pin sleeve 31 and has a reaction force of outward recovery extension under the action of the spring 33, so that the positioning pin can be clamped in a positioning hole or a positioning groove of a workpiece to position the workpiece; when the pin bush 31 is axially moved in the through hole by external force, the positioning pin 2 can be driven to move in the through hole together due to the clamping connection of the positioning pin 2 and the pin bush 31.

In some alternative embodiments, the connection end of the positioning pin 2 is provided with a protrusion extending toward the connecting member 32, one end of the connecting member 32 is located in the accommodating cavity and is provided with a protrusion, and two ends of the spring 33 are respectively clamped on the two protrusions.

It can be understood that the two ends of the spring 33 are respectively clamped on the two protrusions, so that the two protrusions play a role in positioning during the process of extending and retracting the spring 33.

In this example, one end of the connector 32 is located in the receiving cavity and is threadedly connected to the inner wall of the receiving cavity.

In some alternative embodiments, the main body 1 has an end surface through which the positioning pin 2 is inserted, which is horizontal to a radial surface of the positioning pin 2, and is used for placing a workpiece.

It is understood that the end face of the main body portion 1 is used for placing a workpiece, and therefore the shape of the end face of the main body portion 1 is closely related to the positioning of the workpiece, and it is preferable that the end face of the main body portion 1 is horizontal to the radial plane of the positioning pin 2, i.e., perpendicular to the positioning pin 2.

The working principle of the embodiment of the application is as follows: when a workpiece needs to be positioned, the positioning pin 2 is in a natural state, the positioning end of the positioning pin 2 extends out of the through hole of the main body part 1, the workpiece to be positioned is placed on the end face of the main body part 1 at the moment, the positioning pin 2 is aligned with the positioning hole or the positioning groove of the workpiece, the positioning pin 2 moves towards the pin sleeve 31 under the abutting of the side wall of the positioning hole or the positioning groove, the spring 33 is compressed, at the moment, under the action of the connecting piece 32, the spring 33 has a reactive force of restoring extension, the positioning end of the positioning pin 2 is clamped with the positioning hole or the positioning groove of the workpiece, and therefore the workpiece is positioned. After the locating pin 2 is accurate with the work piece location, use clamping device and main part 1 combined action to press from both sides the work piece tightly, 4 pulling connecting pieces 32 of driving piece make the round pin bush 31 move down this moment, because the round pin bush 31 holds the shoulder hole in chamber and the link joint of locating pin 2, consequently drive locating pin 2 together move in the through-hole until no longer with the work piece joint to reserve out the passageway that punches of work piece. After the machining is finished, the oil return of the telescopic oil cylinder is released, the telescopic rod jacks up the first buckle 321 and the second buckle 322 to ascend, and the positioning pin 2 ascends to the initial state together.

The utility model discloses a telescopic pin positioning fixture, through setting up the location end of locating pin to frustum shape, and make the locating pin can stretch out and draw back in the through-hole of main part through the spring, thus can make this positioning fixture adapt to the work piece of different aperture sizes, solved a positioning fixture can only position locating hole or constant head tank in a kind of aperture and need carry on the secondary clamping and punch to the work piece, waste time and energy and the problem that the precision of punching can't be guaranteed; the pin sleeve is sleeved outside the positioning pin, and the pin sleeve is clamped with the positioning pin, so that the positioning pin can be driven to move in the through hole by pulling the pin sleeve, a punching channel is reserved for punching of a workpiece after positioning, and punching precision is ensured; the end face of the main body part is arranged to be horizontal to the radial surface of the positioning pin, so that the positioning accuracy of the workpiece is further guaranteed.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be 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 application can be understood by those of ordinary skill in the art as the case may be.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a telescopic pin positioning fixture which characterized in that includes:

a main body (1) having a through hole;

the positioning pin (2) is arranged in the through hole and can stretch out and draw back in the through hole, the positioning pin (2) comprises a connecting end and a positioning end, and the positioning end is in a frustum shape which shrinks inwards along the extending direction of the positioning pin (2);

and the retaining mechanism (3) is connected with the connecting end of the positioning pin (2) and is used for enabling the positioning end to extend out of the through hole when external force is not applied.

2. A telescopic pin positioning clamp according to claim 1, characterized in that the retaining mechanism (3) comprises:

the pin sleeve (31) is sleeved outside the positioning pin (2) and can slide in the through hole;

one end of the spring (33) is abutted against the connecting end of the positioning pin (2);

a connecting piece (32) which is abutted against the other end of the spring (33) and is used for providing a reaction force for restoring the extension of the spring (33).

3. A telescopic pin positioning clamp according to claim 2, further comprising an actuating member (4), the actuating member (4) being connected to the connecting member (32) for driving the retaining mechanism (3) to move within the through bore and axially move the positioning pin (2) within the through bore.

4. A telescopic pin positioning clamp as claimed in claim 3, wherein:

the connecting piece (32) comprises a first buckle (321) and a second buckle (322) which are connected with each other, and the first buckle (321) is connected with the pin sleeve (31) and is abutted against the other end of the spring (33); the second buckle (322) is connected with the driving piece (4).

5. A telescopic pin positioning clamp as claimed in claim 4, wherein:

the first buckle (321) and the second buckle (322) are connected with each other in a buckling mode.

6. A telescopic pin positioning clamp as claimed in claim 4, wherein:

the driving piece (4) is a telescopic oil cylinder, and the second buckle (322) is in threaded connection with a telescopic rod of the telescopic oil cylinder.

7. A telescopic pin positioning clamp as claimed in claim 2, wherein:

pin bush (31) are equipped with and hold the chamber, and pass through it establishes to hold the chamber cover outside locating pin (2), pin bush (31) with the link joint of locating pin (2).

8. A telescopic pin positioning clamp as claimed in claim 7, wherein:

the outer side of the connecting end of the positioning pin (2) is provided with an annular bulge;

the pin sleeve (31) is internally provided with a stepped hole, and the diameter of the annular protrusion is larger than that of the small hole in the stepped hole and smaller than that of the large hole in the stepped hole.

9. A telescopic pin positioning clamp as claimed in claim 7, wherein:

the link of locating pin (2) is equipped with to the arch that connecting piece (32) extend, the one end of connecting piece (32) is located hold the intracavity and be equipped with the blind hole, the one end card of spring (33) is established on the arch, the other end is located in the blind hole.

10. A telescopic pin positioning clamp as claimed in claim 1, wherein:

the end face, through which the positioning pin (2) penetrates, of one side of the main body part (1) is horizontal to the radial face of the positioning pin (2) and used for placing a workpiece.