CN113579791B

CN113579791B - Positioning tool

Info

Publication number: CN113579791B
Application number: CN202110864000.6A
Authority: CN
Inventors: 赵礼飞; 李贺柱; 杜天保
Original assignee: Anhui Jianghuai Automobile Group Corp
Current assignee: Anhui Jianghuai Automobile Group Corp
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2023-01-13
Anticipated expiration: 2041-07-29
Also published as: CN113579791A

Abstract

The invention discloses a positioning tool which comprises a fixing assembly, a rotating assembly and a positioning assembly, wherein the fixing assembly is arranged on a processing machine tool, the rotating assembly is rotatably connected with the fixing assembly, the positioning assembly comprises a positioning driving piece, a resetting piece and two positioning pieces which are oppositely arranged, the positioning driving piece is arranged on the rotating assembly, the positioning driving piece is used for driving the two positioning pieces to move along the directions which are far away from each other so that the two positioning pieces respectively abut against the positioning inner walls of workpieces, and the resetting piece is used for resetting to drive the two positioning pieces to move along the directions which are close to each other so that the two positioning pieces clamp the positioning outer walls of the workpieces. The positioning tool can be used for positioning the positioning inner wall and the positioning outer wall of the piston respectively, so that the machining precision of the piston is improved.

Description

Positioning tool

Technical Field

The invention relates to the technical field of machining, in particular to a positioning tool.

Background

The piston is one of key parts of an automobile, not only has a complex structure, but also needs to have heat resistance, wear resistance, stable guiding property and good sealing property because the piston needs to bear repeated alternating load under high temperature and high pressure, so that the machining precision requirement of the piston is high. However, in the process of machining the piston, due to the complex structure, different tools need to be replaced for positioning the piston, so that the machining precision of the piston is low.

In view of the above-mentioned drawbacks, it is necessary to provide a new positioning tool.

Disclosure of Invention

The invention mainly aims to provide a positioning tool, and aims to solve the problem that the machining precision of a piston is low due to the fact that different tools are required to position when the piston is machined in the prior art.

In order to achieve the above purpose, the positioning tool provided by the invention comprises a fixing assembly, a rotating assembly and a positioning assembly, wherein the fixing assembly is used for being installed on a processing machine tool, the rotating assembly is rotatably connected with the fixing assembly, the positioning assembly comprises a positioning driving piece, a resetting piece and two positioning pieces which are arranged oppositely, the positioning driving piece is arranged on the rotating assembly, the positioning driving piece is used for driving the two positioning pieces to move along the directions which are far away from each other so that the two positioning pieces respectively abut against the positioning inner walls of a workpiece, and the resetting piece is used for resetting so as to drive the two positioning pieces to move along the directions which are close to each other so that the two positioning pieces clamp the positioning outer walls of the workpiece.

Preferably, the positioning element comprises a first side wall and a second side wall which are arranged oppositely, and a top wall which is connected with the first side wall and the second side wall, the top wall is located on one side of the positioning element away from the rotating assembly, the first side walls of the positioning element are used for being respectively abutted to the positioning inner wall of the workpiece, and the second side walls of the positioning element are used for being respectively abutted to the positioning outer wall of the workpiece.

Preferably, the positioning member is recessed inwards along the surface of the first side wall to form a positioning groove, and the positioning groove is used for inserting the positioning table of the workpiece.

Preferably, the abutting surface of the first side wall is matched with the abutting surface of the positioning inner wall in shape, and the abutting surface of the second side wall is matched with the abutting surface of the positioning outer wall in shape.

Preferably, the distance between the first side wall and the second side wall gradually increases from the top wall to the top wall.

Preferably, the rotating assembly comprises a rotating base and a rotating shaft arranged on the rotating base, and the rotating shaft is rotatably connected with the fixing assembly.

Preferably, two first guide portions are symmetrically arranged on the rotating seat, the two first guide portions are arranged along the radial direction of the rotating shaft, and the positioning element comprises a second guide portion which is in sliding connection with the first guide portions along the length direction of the first guide portions.

Preferably, the first guide part is a guide groove, the second guide part is a guide block, and the second guide part is inserted into the first guide part and slides along the length direction of the first guide part.

Preferably, the fixing assembly comprises a fixing seat and a rotary driving member arranged on the fixing seat, the fixing seat is used for being mounted on the processing machine tool, and the rotary driving member is used for driving the rotary assembly to rotate relative to the fixing seat.

Preferably, fixed subassembly still includes the locating pin, be equipped with the fixed slot on the fixing base, the locating pin is used for inserting in proper order the fixed slot with machine tool.

According to the technical scheme, the positioning tool comprises a fixing assembly, a rotating assembly and a positioning assembly, wherein the rotating assembly is rotatably connected with the fixing assembly, the positioning assembly comprises a positioning driving piece, a resetting piece and two positioning pieces which are arranged oppositely, the positioning driving piece is arranged on the rotating assembly, and the fixing assembly is arranged on a processing machine tool when a workpiece is processed. When the workpiece needs to be positioned through the positioning inner wall of the workpiece, the positioning driving piece drives the two positioning pieces to move along the directions away from each other, so that the two positioning pieces respectively abut against the positioning inner wall of the workpiece; when the workpiece needs to be positioned through the positioning outer wall of the workpiece, the resetting piece resets to drive the two positioning pieces to move along the directions close to each other, so that the two positioning pieces clamp the positioning outer wall of the workpiece. The positioning tool can be used for positioning the positioning inner wall and the positioning outer wall of the piston respectively, so that the machining precision of the piston is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

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

fig. 2 is another schematic structural view of the positioning tool according to an embodiment of the present disclosure;

fig. 3 is a schematic view of another angle structure of the positioning tool according to an embodiment of the present disclosure;

FIG. 4 is a schematic view of a connection structure of the positioning driving member and the reset member according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a piston according to an embodiment of the present invention.

The reference numbers illustrate:

reference numerals	Name(s)	Reference numerals	Name (R)
				1	Fixing assembly	32	Reset piece
11	Fixing seat	33	Locating piece
				111	Fixing groove	331	First side wall
12	Rotary driving member	332	Second side wall
				2	Rotating assembly	333	Roof wall
21	Rotary seat	334	Locating slot
				211	First guide part	100	Workpiece
22	Rotating shaft	101	Positioning inner wall
				3	Positioning assembly	102	Positioning outer wall
31	Positioning driving piece	103	Positioning table

The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a positioning tool, and aims to solve the problem that the machining precision of a piston is low due to the fact that the existing piston is machined by positioning of different tools.

Referring to fig. 1, 4 and 5, the positioning fixture includes a fixing component 1, a rotating component 2 and a positioning component 3, the fixing component 1 is configured to be mounted on a processing machine, the rotating component 2 is rotatably connected to the fixing component 1, the positioning component 3 includes a positioning driving component 31, a resetting component 32 and two positioning components 33 disposed opposite to each other, the positioning driving component 31 is disposed on the rotating component 2, the positioning driving component 31 is configured to drive the two positioning components 33 to move along a direction away from each other, so that the two positioning components 33 respectively abut against the inner positioning wall 101 of the workpiece 100, and the resetting component 32 is configured to reset to drive the two positioning components 33 to move along a direction close to each other, so that the two positioning components 33 clamp the outer positioning wall 102 of the workpiece 100.

The positioning tool comprises a fixed assembly 1, a rotating assembly 2 and a positioning assembly 3, wherein the rotating assembly 2 is rotatably connected with the fixed assembly 1, the positioning assembly 3 comprises a positioning driving piece 31, a resetting piece 32 and two positioning pieces 33 which are oppositely arranged, the positioning driving piece 31 is arranged on the rotating assembly 2, the fixed assembly 1 is arranged on a processing machine tool when a workpiece 100 is processed, and the workpiece 100 comprises a positioning inner wall 101 and a positioning outer wall 102, such as a piston of an automobile. When the workpiece 100 needs to be positioned by positioning the inner wall 101 of the workpiece 100, the positioning driving member 31 drives the two positioning members 33 to move in the directions away from each other, so that the two positioning members 33 respectively abut against the inner wall 101 of the workpiece 100; when the workpiece 100 needs to be positioned by the positioning outer wall 102 of the workpiece 100, the resetting member 32 is reset to drive the two positioning members 33 to move in the direction of approaching each other, so that the two positioning members 33 clamp the positioning outer wall 102 of the workpiece 100. After the positioning of the workpiece 100, the rotating module 2 rotates relative to the fixed module 1, and the machining tool machines the rotating workpiece 100. The positioning tool can be used for positioning the positioning inner wall 101 and the positioning outer wall 102 of the piston respectively, namely, one tool is used for positioning different positioning parts of the piston in the process of machining the piston, so that the machining precision of the piston is improved, and the heat resistance, the wear resistance, the stable guidance and the sealing performance of the piston are improved. And moreover, the machining of the piston can be completed by adopting a positioning tool, so that the machining efficiency of the piston is greatly improved. In one embodiment, as shown in fig. 4, the positioning driving member 31 of the present invention may be a hydraulic tensioner, in which the reset member 32 is a spring in the hydraulic tensioner, when oil is supplied to the interior of the hydraulic tensioner, the hydraulic tensioner is in a tensioned state under the action of oil pressure, and a shaft of the hydraulic tensioner pushes the positioning member 33 to move toward the positioning inner wall 101 until the positioning member 33 abuts against the positioning inner wall 101; when the pressure in the hydraulic tensioner is released, the spring in the hydraulic tensioner acts to pull the positioning member 33 by the shaft of the hydraulic tensioner, so that the positioning member 33 moves towards the positioning outer wall 102 until the positioning member 33 abuts against the positioning outer wall 102. It should be noted that the positioning tool of the present invention is suitable for the workpiece 100 having the positioning outer wall 102 and/or the positioning inner wall 101.

As an embodiment, referring to fig. 1, fig. 2 and fig. 5, the positioning element 33 includes a first side wall 331 and a second side wall 332 that are disposed opposite to each other, and a top wall 333 connecting the first side wall 331 and the second side wall 332, where the top wall 333 is located at a side of the positioning element 33 away from the rotating component 2, the first side walls 331 of the two positioning elements 33 are respectively configured to abut against the positioning inner walls 101 of the workpieces 100, and the second side walls 332 of the two positioning elements 33 are respectively configured to abut against the positioning outer walls 102 of the workpieces 100. In this embodiment, the positioning member 33 includes a first side wall 331 and a second side wall 332 which are oppositely disposed, and a top wall 333 connecting the first side wall 331 and the second side wall 332, where the top wall 333 is located at a side of the positioning member 33 away from the rotating component 2, when the positioning inner wall 101 of the workpiece 100 needs to be positioned, the positioning driving member 31 drives the two positioning members 33 to move along directions away from each other, the first side walls 331 of the two positioning members 33 respectively abut against the positioning inner wall 101 of the workpiece 100, in this case, when the positioning inner wall 101 of the workpiece 100 is provided with an upper end surface, the top wall 333 abuts against the upper end surface, so as to position the workpiece 100 along the rotating shaft 22 direction of the rotating component 2; when the workpiece 100 needs to be positioned by positioning the outer wall 102 of the workpiece 100, the reset member 32 resets to drive the two positioning members 33 to move in the direction of approaching each other, and the second side walls 332 of the two positioning members 33 respectively abut against the outer wall 102 of the workpiece 100.

Further, as shown in fig. 1 and fig. 5, the positioning element 33 is recessed inward along the surface of the first sidewall 331 to form a positioning slot 334, and the positioning slot 334 is used for inserting the positioning table 103 of the workpiece 100. In order to enable the positioning tool to accurately position the workpiece 100, the positioning element 33 is recessed inwards along the surface of the first sidewall 331 to form a positioning slot 334, in an embodiment, the positioning inner wall 101 of the workpiece 100 protrudes outwards to form two positioning tables 103, the two positioning tables 103 are arranged oppositely, when the positioning driving element 31 drives the two positioning elements 33 to move along the directions away from each other, the first sidewalls 331 of the two positioning elements 33 are respectively abutted against the positioning inner walls 101 of the workpiece 100, and the positioning tables 103 are respectively inserted into the corresponding positioning slots 334, so that the workpiece 100 can be prevented from rotating relative to the positioning tool, and the workpiece 100 can be positioned more accurately. In addition, in an embodiment, the positioning groove 334 penetrates through the first side wall 331 and the second side wall 332, two positioning stages 103 oppositely arranged protrude from the positioning outer wall 102 of the workpiece 100, when the reset member 32 is reset to drive the two positioning members 33 to move along the direction of approaching each other, the second side walls 332 of the two positioning members 33 respectively abut against the positioning outer wall 102 of the workpiece 100, and the two positioning stages 103 on the positioning outer wall 102 are respectively inserted into the corresponding positioning grooves 334, so that the workpiece 100 is more accurately positioned.

In addition, as shown in fig. 1 and fig. 5, in an embodiment, an abutting surface of the first sidewall 331 matches with an abutting surface shape of the positioning inner wall 101, and an abutting surface of the second sidewall 332 matches with an abutting surface shape of the positioning outer wall 102. In order to enable the positioning tool to firmly position the workpiece 100, when the positioning inner wall 101 of the workpiece 100 is an arc wall, the first side wall 331 is configured as an arc wall matched with the positioning inner wall 101 of the positioning part 33 in shape, so that the first side wall 331 can be better abutted against the positioning inner wall 101; when the positioning outer wall 102 of the workpiece 100 is a circular arc wall, the second side wall 332 is also provided as a circular arc wall matching the shape of the positioning outer wall 102 of the positioning member 33, so that the second side wall 332 can better abut against the positioning outer wall 102.

As shown in fig. 2 and fig. 5, the distance between the first sidewall 331 and the second sidewall 332 gradually increases from the top wall 333 to a direction away from the top wall 333. In this embodiment, for a workpiece 100 such as a piston, in which the positioning inner wall 101 and the positioning outer wall 102 have a draft angle, in order to make the first side wall 331 and the positioning inner wall 101 better abut against each other, the distance between the first side walls 331 on the two positioning members 33 that are oppositely disposed gradually increases from the side close to the top wall 333 to the direction away from the top wall 333, and in order to make the second side wall 332 and the positioning outer wall 102 better abut against each other, the distance between the second side walls 332 on the two positioning members 33 that are oppositely disposed gradually decreases from the side close to the top wall 333 to the direction away from the top wall 333, that is, the distance between the first side wall 331 and the second side wall 332 on the same positioning member 33 gradually increases from the side close to the top wall 333 to the direction away from the top wall 333, so that the positioning tool can more accurately and reliably position the workpiece 100.

Further, referring to fig. 1 and 2, in order to realize multiple functions, the rotating assembly 2 includes a rotating base 21 and a rotating shaft 22 disposed on the rotating base 21, and the rotating shaft 22 is rotatably connected to the fixing assembly 1. In this embodiment, the rotating assembly 2 includes a rotating base 21 and a rotating shaft 22 disposed on the rotating base 21, the rotating shaft 22 is fixedly connected to the rotating base 21, and the rotating shaft 22 is rotatably connected to the fixing assembly 1. In one embodiment, the fixed component 1 is provided with a rotation hole at the center, a bearing is provided in the rotation hole, and the rotation shaft 22 is inserted into the inner race of the bearing, so that when the rotation shaft 22 is driven to rotate, the rotation shaft 22 can rotate relative to the fixed component 1 through the bearing.

In addition, in the above embodiment, as shown in fig. 1, two first guiding portions 211 are symmetrically disposed on the rotating base 21, the two first guiding portions 211 are arranged along the radial direction of the rotating shaft 22, and the positioning member 33 includes a second guiding portion, and the second guiding portion is slidably connected to the first guiding portion 211 along the length direction of the first guiding portion 211. In order to enable the positioning element 33 to maintain the consistency of the directions when moving, two first guide portions 211 are symmetrically arranged on the rotating base 21, the two first guide portions 211 are arranged along the radial direction of the rotating shaft 22, the positioning element 33 includes a second guide portion, the second guide portion is connected with the first guide portion 211 in a sliding manner along the length direction of the first guide portion 211, when the positioning driving element 31 drives the positioning element 33 to move, the positioning element 33 is connected with the first guide portion 211 in a sliding manner through the second guide portion, and can move along the length direction of the first guide portion 211, that is, the positioning element 33 moves along the radial direction of the rotating shaft 22, so that the positioning element 33 can accurately reach a corresponding positioning position each time and accurately abut against the positioning inner wall 101 or the positioning outer wall 102 of the workpiece 100.

And, in one embodiment, the first guide part 211 is a guide groove, and the second guide part is a guide block, and the second guide part is inserted into the first guide part 211 and slides along a length direction of the first guide part 211. In this embodiment, the first guide portion 211 is a guide groove arranged along a radial direction of the rotation shaft 22, and the second guide portion is a guide block inserted into the guide groove and sliding along a length direction of the guide groove. It should be noted that the first guide portion 211 may also be in the form of a slide rail, the second guide portion may be a sliding slot matching with the slide rail, and the specific structure of the sliding connection between the first guide portion 211 and the second guide portion may be set according to actual requirements.

Further, please refer to fig. 3, the fixing assembly 1 includes a fixing base 11 and a rotary driving member 12 disposed on the fixing base 11, wherein the fixing base 11 is configured to be mounted on the processing machine, and the rotary driving member 12 is configured to drive the rotary assembly 2 to rotate relative to the fixing base 11. In this embodiment, the fixing assembly 1 includes a fixing seat 11 and a rotary driving element 12 disposed on the fixing seat 11, and when a workpiece 100 positioned by the positioning tool needs to be processed, the positioning tool is mounted on the processing machine through the fixing seat 11, and the rotary driving element 12 drives the rotary assembly 2 to rotate relative to the fixing seat 11, and then the workpiece 100 rotated on the positioning tool is processed by the processing machine.

In addition, as shown in fig. 2 and fig. 3, the fixing assembly 1 further includes a positioning pin, a fixing seat 11 is provided with a fixing groove 111, and the positioning pin is used for being sequentially inserted into the fixing groove 111 and the processing machine. In this embodiment, in order to make the location frock can pinpoint on the processing machine tool, fixed subassembly 1 still includes the locating pin, is equipped with fixed slot 111 on the fixing base 11, when fixing base 11 to the processing machine tool, corresponds fixed slot 111 with the locating hole on the processing machine tool, inserts the locating pin in fixed slot 111 and the locating hole that corresponds in proper order again. The number of the fixing grooves 111 may be 2, 3, or 4, and is selected according to the size of the fixing base 11 and the machining accuracy.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a location frock, its characterized in that, location frock includes:

a securing assembly for mounting on a processing machine;

the rotating assembly is rotationally connected with the fixing assembly;

the positioning assembly comprises a positioning driving piece, a resetting piece and two positioning pieces which are arranged oppositely, the positioning driving piece is arranged on the rotating assembly, the positioning driving piece is used for driving the two positioning pieces to move along the directions away from each other so as to enable the two positioning pieces to abut against the positioning inner walls of the workpiece respectively, and the resetting piece is used for resetting so as to drive the two positioning pieces to move along the directions close to each other so as to enable the two positioning pieces to clamp the positioning outer walls of the workpiece;

the positioning pieces comprise a first side wall and a second side wall which are arranged oppositely, and a top wall connecting the first side wall and the second side wall, the top wall is positioned on one side of the positioning pieces far away from the rotating assembly, the first side walls of the two positioning pieces are used for being respectively abutted against the positioning inner walls of the workpieces, and the second side walls of the two positioning pieces are used for being respectively abutted against the positioning outer walls of the workpieces;

the positioning piece is inwards sunken along the surface of the first side wall to form a positioning groove, and the positioning groove is used for inserting a positioning table of the workpiece;

the positioning groove penetrates through the first side wall and the second side wall;

the positioning inner wall of the workpiece is provided with an upper end face, and the top wall is used for being abutted to the upper end face.

2. The positioning tool according to claim 1, wherein the abutting surface of the first side wall is matched with the abutting surface of the positioning inner wall in shape, and the abutting surface of the second side wall is matched with the abutting surface of the positioning outer wall in shape.

3. The positioning tool according to claim 1, wherein the distance between the first side wall and the second side wall gradually increases from the position close to the top wall to the position far away from the top wall.

4. The positioning tool according to any one of claims 1 to 3, wherein the rotating assembly comprises a rotating base and a rotating shaft arranged on the rotating base, and the rotating shaft is rotatably connected with the fixing assembly.

5. The positioning tool according to claim 4, wherein the rotating base is provided with two first guide portions which are symmetrically arranged, the two first guide portions are arranged along the radial direction of the rotating shaft, and the positioning member comprises a second guide portion which is slidably connected with the first guide portion along the length direction of the first guide portion.

6. The positioning tool according to claim 5, wherein the first guide part is a guide groove, the second guide part is a guide block, and the second guide part is inserted into the first guide part and slides along the length direction of the first guide part.

7. The positioning tool according to any one of claims 1 to 3, wherein the fixing assembly comprises a fixing seat and a rotary driving member arranged on the fixing seat, the fixing seat is used for being mounted on the processing machine, and the rotary driving member is used for driving the rotary assembly to rotate relative to the fixing seat.

8. The positioning tool according to claim 7, wherein the fixing assembly further comprises a positioning pin, a fixing groove is formed in the fixing seat, and the positioning pin is used for being sequentially inserted into the fixing groove and the processing machine tool.