CN213839193U

CN213839193U - Expansion positioning pin

Info

Publication number: CN213839193U
Application number: CN202022859079.7U
Authority: CN
Inventors: 王�锋
Original assignee: Shenzhen Shenyi Electronic Technology Co ltd
Current assignee: Shenzhen Shenyi Electronic Technology Co ltd
Priority date: 2020-12-02
Filing date: 2020-12-02
Publication date: 2021-07-30
Anticipated expiration: 2030-12-02

Abstract

The utility model provides an expansion positioning pin, including hexagon socket head cap screw, the cavity round pin body, fan-shaped slider and elastic rubber ring, hexagon socket head cap screw lower extreme is equipped with the drive division of a body structure, the internal screw hole that is equipped with of cavity round pin, hexagon socket head cap screw and screw hole threaded connection, set up the arc recess that is the symmetry setting on the periphery wall of the cavity round pin body and be the fan-shaped hole that the symmetry set up, fan-shaped hole and screw hole intercommunication, but fan-shaped slider sliding connection is in fan-shaped hole, fan-shaped slider's medial surface is opened and is established domaticly down, arc recess two has been seted up on fan-shaped slider's the extrados, arc recess one and arc recess two intercommunication form annular groove, elastic rubber ring cover is established outside annular groove. The utility model discloses the inaccurate location pinhole of diameter processing on the applicable base plate need not to carry out the reworking to the base plate, has saved human cost and processing cost.

Description

Expansion positioning pin

Technical Field

The utility model relates to a locating pin field specifically is an expansion locating pin.

Background

The locating pin is the part that plays the positioning action, in the assembly process of equipment, generally squeeze into the locating pin hole on the base plate with the locating pin, lean on other work pieces to tight locating pin again and install, current locating pin is the cylinder that the diameter is fixed usually, when locating pin and the locating pin hole on the base plate cooperate, require the diameter of locating pin hole to accomplish fairly accurate size, otherwise when this diameter is little, the locating pin is not beaten forward, when this diameter is slightly big, the locating pin is squeezed into the back and is not fastened, to the inaccurate locating pin hole of diameter, need do over again the base plate, need move the base plate back to the processing machine tool promptly, the rethread machine tool processes the locating pin hole again, human cost and processing cost have been wasted to whole process.

Disclosure of Invention

An object of the utility model is to provide an inflation locating pin to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides an expansion positioning pin, includes hexagon socket head cap screw, the cavity round pin body, fan-shaped slider and elasticity rubber ring, hexagon socket head cap screw lower extreme is equipped with the drive division of a body structure, the internal screw hole that is equipped with of cavity round pin, hexagon socket head cap screw and screw hole threaded connection, set up the arc recess that is the symmetry and sets up and be the fan-shaped hole that the symmetry set up on the periphery wall of the cavity round pin body, fan-shaped hole and screw hole intercommunication, but fan-shaped slider sliding connection is in fan-shaped downthehole, it is domatic down to open the medial surface of fan-shaped slider, arc recess two has been seted up on the extrados of fan-shaped slider, arc recess one and arc recess two intercommunications form annular groove, the elasticity.

Furthermore, the upper surface of the sector sliding block is provided with a convex strip of an integrated structure, the upper surface of the sector hole is provided with a sliding groove corresponding to the convex strip, and the convex strip is slidably connected with the sliding groove.

Furthermore, the upper surface and the lower surface of the sector hole are respectively provided with at least two upper grooves and at least two lower grooves.

Further, the driving part is of an inverted frustum structure.

Further, the driving part is of a sphere structure.

The utility model has the advantages that:

use the utility model discloses the time, earlier the utility model discloses a lower extreme cartridge is downthehole in the locating pin of base plate, drives the rotatory radius frustum structure downstream that makes its lower extreme of hexagon socket head cap screw all up to hexagon socket head cap screw in again, and this in-process, the drive division of hexagon socket head cap screw lower extreme gets into between two fan-shaped slider's the downhill path and drives both elasticity of overcoming the elastic rubber circle and do the motion dorsad, reaches the utility model discloses expanded effect, when two fan-shaped slider's extrados all paste tightly with the inside wall of locating pin hole, the utility model discloses fasten in the locating pin downthehole.

Compared with the prior art, the utility model discloses the inaccurate location pinhole of diameter processing on the adaptable substrate need not to carry out the reworking to the base plate, has saved human cost and processing cost to fan-shaped slider's extrados is more with the inside wall area of contact of location pinhole, makes the utility model discloses the stability of hugging closely with the location pinhole is higher.

Drawings

FIG. 1: a front view schematic diagram of an expansion locating pin.

FIG. 2: a left side view schematic of an expansion dowel.

FIG. 3: a schematic left view of a hollow pin body of an expansion locating pin.

FIG. 4: a schematic perspective view of a sector-shaped slide block of an expansion positioning pin.

FIG. 5: A-A section of an expansion dowel is schematically shown.

Detailed Description

The invention is further explained below with reference to the drawings:

referring to fig. 1 to 5, an expansion positioning pin includes a hexagon socket head cap screw 1, a hollow pin body 2, a sector-shaped slider 3 and an elastic rubber ring 4, a driving portion 11 of an integrated structure is disposed at a lower end of the hexagon socket head cap screw 1, a threaded hole axially penetrating is disposed in the hollow pin body 2, the hexagon socket head cap screw 1 is in threaded connection with the threaded hole, first arc-shaped grooves 21 symmetrically disposed are disposed on an outer peripheral wall of the hollow pin body 2, sector-shaped holes 22 symmetrically disposed are disposed on a side wall of the hollow pin body 2, the sector-shaped holes 22 are communicated with the threaded hole, the sector-shaped slider 3 is slidably connected in the sector-shaped holes 22, a lower slope 31 is disposed on an inner side surface of the sector-shaped slider 3, second arc-shaped grooves 32 are disposed on an outer arc surface 34 of the sector-shaped slider 3, the first arc-shaped grooves 21 and the second arc-shaped grooves 32 are communicated to form an annular groove, and the elastic rubber ring 4 is sleeved outside the annular groove.

The driving part 11 is of an inverted circular truncated cone structure or a sphere structure, and the sector holes 22 are also used for limiting the limit of inward movement of the sector sliding blocks 3, so that the upper parts of the downhill surfaces of the two sector sliding blocks 3 are kept at a proper interval, and the driving part 11 can smoothly enter between the downhill surfaces of the two sector sliding blocks 3 when moving downwards.

Referring to fig. 3 and 4, the convex strip 33 of the integrated structure is disposed on the upper surface of the sector slider 3, the sliding slot 221 is disposed on the upper surface of the sector hole 22 corresponding to the convex strip 33, the convex strip 33 is slidably connected with the sliding slot 221, so as to guide the sector slider 3 and prevent the sector slider 3 from rotating during the outward movement process, which results in poor fit between the outer arc surface 34 of the sector slider 3 and the inner side wall of the positioning pin hole.

Referring to fig. 3, the upper surface and the lower surface of the sector hole 22 are respectively provided with at least two upper grooves 222 and at least two lower grooves 223. The upper groove 222 and the lower groove 223 are used for reducing the contact area between the sector hole 22 and the sector slider 3, so that the friction force between the sector hole 22 and the sector slider 3 is reduced, and the sliding smoothness of the sector slider 3 is improved.

Use the utility model discloses the time, with the lower extreme cartridge of the cavity body of selling 2 in the locating pin hole of base plate, the locating pin hole is the blind hole, the upper end protrusion base plate of the cavity body of selling 2, so that the lateral wall of work piece can paste with the periphery wall of the cavity body of selling 2 and lean on, drive the interior hexagonal bolt 1 through interior hexagonal spanner and rotate the drive division 11 downstream that makes its lower extreme and screw up to interior hexagonal bolt 1, this in-process, the drive division 11 of interior hexagonal bolt 1 lower extreme gets into between the downhill path face 31 of two fan-shaped sliding blocks 3 and drives two fan-shaped sliding blocks 3 and overcome elasticity of elastic rubber circle 4 and do the motion dorsad, reach the utility model discloses expanded effect, when two fan-shaped sliding blocks 3's extrados 34 all paste tightly with the inside wall in locating pin hole, the utility model discloses fasten in the locating pin hole.

When needs are pulled out from the locating pin hole the utility model discloses the time, drive the rotatory drive division 11 upward movements that make its lower extreme of hexagon socket head cap screw 1 through interior hexagonal spanner, this in-process, under the effect of the elastic restoring force of elastic rubber ring 4, two fan-shaped sliders 3 of elastic rubber ring 4 drive are the motion in opposite directions, when fan-shaped slider 3's extrados 34 is traped in fan-shaped hole 22, upwards stimulate hexagon socket head cap screw 1's nut portion, can with the utility model discloses extract in the locating pin hole, make things convenient for later stage used repeatedly.

The bolt further comprises a nut (shown in the figure), wherein the nut is sleeved on the screw rod of the inner hexagon bolt 1 and is positioned between the nut of the inner hexagon bolt 1 and the hollow pin body 2. After the hexagon socket head cap screw 1 is screwed, the current position of the hexagon socket head cap screw 1 can be completely fixed by screwing the nut, and the hexagon socket head cap screw 1 is prevented from rotating under the action of external force.

The above is not intended to limit the technical scope of the present invention, and any modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are all within the scope of the technical solution of the present invention.

Claims

1. An expansion positioning pin is characterized in that: including hexagon socket head cap screw, cavity round pin body, fan-shaped slider and elastic rubber ring, hexagon socket head cap screw lower extreme is equipped with the drive division of a body structure, the internal screw hole that is equipped with of cavity round pin, hexagon socket head cap screw and screw hole threaded connection, set up the arc recess that is the symmetry setting on the periphery wall of cavity round pin body and be the sector hole that the symmetry set up, sector hole and screw hole intercommunication, but fan-shaped slider sliding connection is in sector hole, it is domatic down to open the medial surface of fan-shaped slider, arc recess two has been seted up on the extrados of fan-shaped slider, arc recess one and arc recess two intercommunications form annular groove, elastic rubber ring cover is established outside the annular groove.

2. An expansion dowel as claimed in claim 1, wherein: the upper surface of the fan-shaped sliding block is provided with a convex strip of an integrated structure, the upper surface of the fan-shaped hole is provided with a sliding groove corresponding to the convex strip, and the convex strip is slidably connected with the sliding groove.

3. An expansion dowel as claimed in claim 1, wherein: the upper surface and the lower surface of the fan-shaped hole are respectively provided with at least two upper grooves and at least two lower grooves.

4. An expansion dowel as claimed in claim 1, wherein: the driving part is of an inverted frustum structure.

5. An expansion dowel as claimed in claim 1, wherein: the driving part is of a sphere structure.