CN210677905U

CN210677905U - Rotation stopping type pneumatic telescopic pin mechanism

Info

Publication number: CN210677905U
Application number: CN201921443210.2U
Authority: CN
Inventors: 帅智杰
Original assignee: Guangzhou Minshi Auto Parts Co ltd
Current assignee: Guangzhou Minshi Auto Parts Co ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-06-05
Anticipated expiration: 2029-08-30

Abstract

The utility model discloses a spline type pneumatic telescopic pin mechanism, including cylinder, closed mount pad, linear bearing, guide arm and the locating pin of setting in closed mount pad, closed mount pad is installed on the cylinder, and the drive shaft of cylinder is located closed mount pad, the guide arm has spline end and is located the link of closed mount pad, and the outside surface of spline end is equipped with spline face, and the drive shaft of link and cylinder is connected, and the blind end of closed mount pad is equipped with spline hole, and spline end passes linear bearing and spline hole back, is connected with the locating pin. The rotation stopping surfaces of the rotation stopping holes and the guide rod prevent the positioning pins from rotating in the driving process, the linear bearings are used for replacing carbon-based copper alloy bushings, and the service life of the mechanism is prolonged. The utility model discloses compact structure easily installs and debugs, and the drive shaft of guide arm and cylinder is installed in sealing the mount pad, and isolated welding slag reduces the foreign matter influence, improves direction precision and life.

Description

Rotation stopping type pneumatic telescopic pin mechanism

Technical Field

The utility model relates to a positioning mechanism, especially a spline type pneumatic telescopic pin mechanism in the automobile parts production research field.

Background

In the production process of the automobile welding procedure, most sheet metal parts on the white automobile body use the positioning mode of the reference hole and the reference surface. Wherein the positioning of the reference holes requires the use of positioning pins. The locating pin that initial fixture used is fixed mode, and some process locating pin holes are in large quantity, lead to process car sheet metal component welding back as an organic whole, have a plurality of benchmark holes all to be fixed a position by the locating pin, lead to the location, get a difficulty.

Meanwhile, along with the continuous development of the automation degree in the automobile production process, a mode of driving the positioning pin by the cylinder gradually appears. The locating pin is automatically extended and retracted by using an air cylinder according to a set electric program. However, due to pollution such as splashing and dust at a welding station, welding slag and dust are easily adhered to a pneumatic telescopic pin guide rod of a common mechanism, and a guide common carbon-based copper alloy bushing used by the guide rod is easily abraded, short in service life and poor in precision; some mechanisms use standard rod cylinders directly. It is bulky, be unfavorable for anchor clamps lightweight design, locating pin and cylinder effort are eccentric, and the precision is relevant with cylinder degree of wear to need to make the welding slag guard plate in addition, cause the structure complicacy.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a spline pneumatic telescopic pin mechanism of type prevents through the spline face of splines hole and guide arm that the locating pin from rotating, uses linear bearing to replace charcoal base copper alloy bush, hoist mechanism life-span.

The utility model provides a solution of its technical problem is: the utility model provides a spline type pneumatic telescopic pin mechanism, includes cylinder, seals the mount pad, sets up linear bearing, guide arm and the locating pin in sealing the mount pad, seal the mount pad and install on the cylinder, the drive shaft of cylinder is located seals the mount pad, the guide arm has spline end and is located the link that seals the mount pad, and the outside surface that splines the end is equipped with splines the face, and the link is connected with the actuating shaft of cylinder, and the blind end that seals the mount pad is equipped with splines the hole, splines the end and passes linear bearing and splines after the hole, is connected with the locating pin.

The pneumatic telescopic pin mechanism at least has the following beneficial effects: the rotation stopping surfaces of the rotation stopping holes and the guide rod prevent the positioning pins from rotating in the driving process, the linear bearings are used for replacing carbon-based copper alloy bushings, and the service life of the mechanism is prolonged. The utility model discloses compact structure easily installs and debugs, and the drive shaft of guide arm and cylinder is installed in sealing the mount pad, and isolated welding slag reduces the foreign matter influence, improves direction precision and life.

As a further improvement of the above technical solution, the closed mounting seat includes a seat body with two open ends and a closed cover installed at one end of the seat body, and the rotation stopping hole is disposed on the closed cover. One end of the seat body is fixed on the cylinder and covers the driving shaft of the cylinder.

As a further improvement of the above technical solution, a first hole and a second hole having an inner diameter larger than that of the first hole are provided in the seat body, a first step is provided between the first hole and the second hole, and the linear bearing is installed between the first step and the closing cover. The first step and the closing cap fix the linear bearing, and the closing cap is installed on the base body through bolts, so that replacement and maintenance are avoided.

As a further improvement of the technical scheme, a floating joint is arranged between the connecting end and the driving shaft of the air cylinder. The floating joint can prevent the guide rod from being locked by extension.

As a further improvement of the technical scheme, the rotation stopping surface penetrates through the outer side surface of the rotation stopping end along the axial direction of the rotation stopping end, and a second step is formed at the intersection of the rotation stopping end and the connecting end. The second step is a limiting device of the guide rod along the axial direction, so that the driving shaft of the air cylinder keeps the pressure stroke and maintains the precision.

As a further improvement of the technical scheme, the cylinder is a compact cylinder. The compact cylinder generally refers to a cylinder having a simplified structure and a reduced size.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

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

fig. 2 is a cross-sectional view of an embodiment of the invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does 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.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1-2, a rotation stopping type pneumatic telescopic pin mechanism comprises a cylinder 15, a closed mounting seat 14, a linear bearing 17 arranged in the closed mounting seat 14, a guide rod and a positioning pin 10, wherein the closed mounting seat 14 is mounted on the cylinder 15, a driving shaft of the cylinder 15 is located in the closed mounting seat 14, the guide rod is provided with a rotation stopping end 11 and a connecting end 16 located in the closed mounting seat 14, a rotation stopping surface 12 is arranged on the outer side surface of the rotation stopping end 11, the connecting end 16 is connected with the driving shaft of the cylinder 15, a rotation stopping hole is formed in the closed end of the closed mounting seat 14, and the rotation stopping end 11 penetrates through the linear bearing 17 and the rotation stopping hole and then is connected with the positioning pin 10. The end face of the rotation stopping end 11 is provided with a threaded hole, one end of the positioning pin 10 is provided with a threaded end, and after the threaded end is screwed into the threaded hole, the positioning pin 10 is fixed on the end face of the rotation stopping end 11. The linear bearing 17 is in contact with the outer side surface of the guide bar through balls to guide the linear motion of the guide bar.

The rotation stopping surface 12 of the rotation stopping hole and the guide rod prevents the positioning pin 10 from rotating in the driving process, and the linear bearing 17 is used for replacing a carbon-based copper alloy bushing, so that the service life of the mechanism is prolonged. The utility model discloses compact structure easily installs and debugs, and guide arm and cylinder 15's drive shaft are installed in sealing mount pad 14, and isolated welding slag reduces the foreign matter influence, improves direction precision and life.

The closed installation seat 14 comprises a seat body with two open ends and a closed cover 13 installed at one end of the seat body, and the rotation stopping hole is formed in the closed cover 13. One end of the seat body is fixed on the cylinder 15 to cover the driving shaft of the cylinder 15.

A first hole and a second hole with the inner diameter larger than that of the first hole are arranged in the base body, a first step is arranged between the first hole and the second hole, and the linear bearing 17 is arranged between the first step and the closed cover 13. During installation, the linear bearing 17 is placed in the second hole, the sealing cover 13 is fixed on the base, the linear bearing 17 is fixed by the first step and the sealing cover 13, and the sealing cover 13 is installed on the base through bolts, so that replacement and maintenance are avoided. The driving shaft of the cylinder 15 is connected with the connecting end 16, and the rotation stopping end 11 passes through the linear bearing 17 and the rotation stopping hole to fix the seat body and the cylinder 15.

A floating joint 18 is provided between the connecting end 16 and the drive shaft of the cylinder 15. The floating joint 18 prevents the guide bar from being jammed.

The rotation stopping surface 12 penetrates through the outer side surface of the rotation stopping end 11 along the axial direction of the rotation stopping end 11, and a second step is formed at the intersection of the rotation stopping end 11 and the connecting end 16. The second step is a limiting device of the guide rod along the axial direction, so that the driving shaft of the air cylinder 15 keeps the pressure stroke and maintains the precision.

The cylinder 15 is a compact cylinder. The compact cylinder generally refers to a cylinder having a simplified structure and a reduced size.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.

Claims

1. The utility model provides a spline type pneumatic telescopic pin mechanism which characterized in that: including cylinder, closed mount pad, linear bearing, guide arm and the locating pin of setting in closed mount pad, closed mount pad is installed on the cylinder, and the drive shaft of cylinder is located closed mount pad, the guide arm has the end of splining and is located the link of closed mount pad, and the outside surface of splining the end is equipped with the face of splining, and the link is connected with the actuating shaft of cylinder, and the blind end of closed mount pad is equipped with the hole of splining, and the end of splining passes linear bearing and the hole of splining after, is connected with the locating pin.

2. The rotation-stop pneumatic retracting pin mechanism according to claim 1, wherein: the closed mounting seat comprises a seat body with two open ends and a closed cover arranged at one end of the seat body, and the rotation stopping hole is formed in the closed cover.

3. The rotation-stop pneumatic retracting pin mechanism according to claim 2, wherein: the base body is internally provided with a first hole and a second hole with the inner diameter larger than that of the first hole, a first step is arranged between the first hole and the second hole, and the linear bearing is arranged between the first step and the closed cover.

4. The rotation-stop pneumatic retracting pin mechanism according to claim 1, wherein: and a floating joint is arranged between the connecting end and the driving shaft of the air cylinder.

5. The rotation-stop pneumatic retracting pin mechanism according to claim 1, wherein: the rotation stopping surface penetrates through the outer side surface of the rotation stopping end along the axial direction of the rotation stopping end, and a second step is formed at the intersection of the rotation stopping end and the connecting end.

6. The rotation-stop pneumatic retracting pin mechanism according to claim 1, wherein: the cylinder is a compact cylinder.