CN214274178U

CN214274178U - Self-adaptive positioning pin structure

Info

Publication number: CN214274178U
Application number: CN202023229497.4U
Authority: CN
Inventors: 彭作明; 李宏光; 王俊; 李庆军
Original assignee: Dalian Aotuo Automation Equipment Co ltd
Current assignee: Dalian Aotuo Automation Equipment Co ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-09-24
Anticipated expiration: 2030-12-29

Abstract

The rear end part of the positioning pin is positioned in the box body, and the front end part of the positioning pin extends to the outer side of the box body from a pin hole in a front plate of the box body; a front thrust bearing and a rear thrust bearing are respectively arranged between the front step and the rear step of the positioning pin positioned in the box body and between the front plate and the rear plate of the box body, and the positioning pin is axially positioned through the front thrust bearing and the rear thrust bearing; four groups of elastic ejector rod assemblies are uniformly distributed on the periphery of the box body, each elastic ejector rod assembly comprises an ejector rod perpendicular to the corresponding positioning pin, a spherical surface is arranged at one end of each ejector rod, the spherical surface abuts against the outer circumferential surface of the rear end portion of the corresponding positioning pin, the other end of each ejector rod extends out of the box body, two nuts screwed mutually are connected to the extending end of each ejector rod in a threaded mode, a pressing ring is sleeved on each ejector rod inside the box body, a spring is sleeved on each ejector rod, one end of each spring abuts against a step at the end of each ejector rod, the other end of each spring abuts against the corresponding pressing ring, and the ejector rods enable the spherical surfaces to always press against the outer side face of the rear end portion of the corresponding positioning pin under the elastic force of the springs.

Description

Self-adaptive positioning pin structure

Technical Field

The utility model relates to a locating pin structure, especially a self-adaptation locating pin structure.

Background

In the process of loading the workpiece, a positioning pin is usually required to be inserted for positioning, so that the workpiece is ensured to be accurate in position in the process of machining or assembling, and the phenomenon of deviation is avoided. The position of the locating pins is generally fixed, and the distance between each locating pin is constant. However, there are some special cases, for example, the relative position between the positioning holes on the workpiece changes or the relative position between the positioning holes of the workpiece and the positioning pins deviates when loading, and the positioning pins are difficult to be inserted into the pin holes of the workpiece smoothly, and therefore, manual adjustment is required, which is time-consuming and labor-consuming.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple structure, locating pin can float adjustment by oneself when inserting the pinhole, the locating pin inserts smoothly, also need not artificial adjustment, labour saving and time saving's self-adaptation locating pin structure when micro deviation appears in locating pin and pinhole, overcome the not enough of prior art.

The utility model discloses a self-adaptive positioning pin structure, which comprises a positioning pin, wherein the rear end part of the positioning pin is positioned in the box body, and the front end part of the positioning pin extends to the outer side of the box body from a pin hole on the front plate of the box body; a front thrust bearing and a rear thrust bearing are respectively arranged between the front step and the rear step of the positioning pin positioned in the box body and between the front plate and the rear plate of the box body, and the positioning pin is axially positioned through the front thrust bearing and the rear thrust bearing; four groups of elastic ejector rod assemblies are uniformly distributed on the periphery of the box body, each elastic ejector rod assembly comprises an ejector rod which is perpendicular to the positioning pin, a spherical surface is arranged at one end of each ejector rod, the spherical surface abuts against the outer side surface of the rear end part of the positioning pin, the other end of each ejector rod extends out of the box body, the extending end of each ejector rod is in threaded connection with two nuts which are screwed mutually, a compression ring is sleeved on the ejector rod inside the box body, a spring is sleeved on each ejector rod, one end of each spring abuts against the step at the end of each ejector rod, the other end of each spring abuts against the compression ring, and the ejector rods enable the spherical surfaces to press against the outer circumferential surface of the rear end part of the positioning pin all the time under the elastic action of the springs.

The utility model discloses an adaptation locating pin structure, because the radial elasticity ejector pin subassembly through four group evenly distributed of periphery of locating pin carries out radial support spacing, if the deviation appears when the locating pin inserts the work piece pinhole, the locating pin can automatic alignment in the footpath, inserts in the pinhole smoothly under the effect of radial force, need not the manual work and adjusts, labour saving and time saving, improvement work efficiency.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic sectional view taken along line a-a in fig. 1.

Detailed Description

As shown in fig. 1 and 2: the locating pin 1 is a locating pin, the rear end of the locating pin 1 is located in the box body 4, and the front end of the locating pin 1 extends to the outer side of the box body 4 from a pin hole 10 in the front plate of the box body 4. The box body 4 is formed by fixedly connecting metal plates. A front thrust bearing 2 and a rear thrust bearing 3 are respectively arranged between the front step and the rear step of the positioning pin 1 in the box body 4 and between the front plate and the rear plate of the box body 4, and the positioning pin 1 is axially positioned through the front thrust bearing 2 and the rear thrust bearing 3.

Four groups of elastic ejector rod assemblies are uniformly distributed on the periphery of the box body 4, each elastic ejector rod assembly comprises an ejector rod 5 which is perpendicular to the corresponding positioning pin 1, a spherical surface 7 is arranged at one end of each ejector rod 5, and the spherical surfaces 7 abut against the outer circumferential surface of the rear end portion of the corresponding positioning pin 1. The other end of the mandril 5 extends out of the box body 4. The extending end of the mandril 5 is connected with two nuts 9 which are screwed tightly. The push rod 5 in the box body 4 is sleeved with a press ring 8, the push rod 5 is sleeved with a spring 6, one end of the spring 6 abuts against a step at the end of the push rod 5, and the other end of the spring 6 abuts against the press ring 8. The ejector rod 5 enables the spherical surface 7 to always press against the outer side surface of the rear end part of the positioning pin 1 under the elastic force action of the spring 6, the outer side surface of the rear end of the positioning pin 1 is provided with four planes, namely the rear end part of the positioning pin 1 is in a quadrangular shape.

Because the radial elasticity ejector pin subassembly through four group evenly distributed on the periphery of locating pin radially supports spacingly, if the deviation appears when the locating pin inserts the work piece pinhole, the locating pin can be automatic alignment in footpath under the effect of radial force, inserts in the pinhole smoothly, need not the manual work and adjusts, labour saving and time saving improves work efficiency.

Claims

1. The utility model provides a self-adaptation locating pin structure, includes locating pin (1), its characterized in that: the rear end part of the positioning pin (1) is positioned in the box body (4), and the front end part of the positioning pin (1) extends to the outer side of the box body (4) from a pin hole (10) on the front plate of the box body (4); a front thrust bearing (2) and a rear thrust bearing (3) are respectively arranged between the front step and the rear step of the positioning pin (1) positioned in the box body (4) and between the front plate and the rear plate of the box body (4), and the positioning pin (1) is axially positioned through the front thrust bearing (2) and the rear thrust bearing (3); four groups of elastic mandril assemblies are uniformly distributed on the periphery of the box body (4), each elastic mandril assembly comprises a mandril (5) which is perpendicular to the positioning pin (1), a spherical surface (7) is arranged at one end of each mandril (5), the spherical surface (7) is propped against the outer side surface of the rear end part of the positioning pin (1), the other end of each mandril (5) extends out of the box body (4), the extending end of each mandril (5) is in threaded connection with two nuts (9) which are screwed mutually, a pressing ring (8) is sleeved on a top rod (5) in the box body (4), a spring (6) is sleeved on the top rod (5), one end of the spring (6) abuts against a step at the end of the top rod (5), the other end of the spring (6) abuts against the pressing ring (8), and the top rod (5) enables the spherical surface (7) to always press against the outer circumferential surface of the rear end part of the positioning pin (1) under the elastic force action of the spring (6).