CN213828639U

CN213828639U - Positioning fixture for processing bicycle chain wheel

Info

Publication number: CN213828639U
Application number: CN202021906612.4U
Authority: CN
Inventors: 蒋忠学; 杨强
Original assignee: Hongrui Tiancheng Technology Tianjin Co ltd
Current assignee: Hongrui Tiancheng Technology Tianjin Co ltd
Priority date: 2020-09-03
Filing date: 2020-09-03
Publication date: 2021-07-30
Anticipated expiration: 2030-09-03

Abstract

The utility model relates to a positioning fixture for processing a bicycle chain wheel, which comprises a first fixture and a second fixture, wherein the first fixture comprises a first base, a first upright post, a first clamping seat and a pressing component, the first clamping seat is fixed on the first base through the first upright post, a forming groove is arranged on the first clamping seat, the pressing component is arranged at the periphery of the first clamping seat so as to press or release a workpiece, and the workpiece is placed on the first clamping seat; the second clamp comprises a second base, a second stand column, a second clamping seat, an annular pressing block and a rotary pressing assembly, the second clamping seat is fixed on the second base through the second stand column, a through hole which is communicated with the second clamping seat is formed in the second clamping seat, the annular pressing block is arranged on the second clamping seat and is arranged concentrically with the through hole, the rotary pressing assembly is arranged in the through hole and is fixed on the second base, and the rotary pressing assembly can press or release the annular pressing block. The utility model is simple in operation, use manpower sparingly, improve production efficiency.

Description

Positioning fixture for processing bicycle chain wheel

Technical Field

The utility model relates to a bicycle chain wheel processing technology field especially relates to a positioning fixture is used in bicycle chain wheel processing.

Background

The chain wheel is a connecting structure between a middle shaft and a crank of the bicycle. In the processing process of the chain wheel, a workpiece to be processed needs to be fixed by adopting a clamp, so that the subsequent processing of the workpiece is facilitated.

However, the conventional fixture is manually operated to fix the workpiece, an operator firstly places the workpiece on the base, locks and fixes the workpiece on the base through the bolts, and can assemble and disassemble the workpiece only by operating the fixture one by one, so that the fixture is complex in operation, low in production efficiency, and quite high in labor intensity of the operator due to frequent manual operation.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a positioning fixture is used in bicycle chain wheel processing of easy operation, use manpower sparingly, improvement production efficiency.

The utility model provides a positioning clamp for processing a bicycle chain wheel, which comprises a first clamp and a second clamp,

the first clamp comprises a first base, a first upright post, a first clamping seat and a pressing assembly, the first clamping seat is fixed on the first base through the first upright post, a forming groove is formed in the first clamping seat, the pressing assembly is arranged on the periphery of the first clamping seat to press or release a workpiece, and the workpiece is placed on the first clamping seat;

the second anchor clamps include second base, second stand, second holder, annular briquetting and rotatory subassembly that compresses tightly, the second holder passes through the second stand to be fixed on the second base, be equipped with the through-hole that link up on the second holder, annular briquetting locate on the second holder and with the through-hole sets up with one heart, rotatory subassembly that compresses tightly is located in the through-hole and is fixed in on the second base, rotatory subassembly that compresses tightly can be right annular briquetting compresses tightly or releases.

Preferably, the compressing assembly comprises a lifting cylinder and a first pressing rod, the lifting cylinder is installed on the first base, and a piston rod of the lifting cylinder is connected with the end of the first pressing rod.

In any of the above schemes, preferably, the center of the forming groove is provided with a mounting hole, and a fastening piece is arranged in the mounting hole.

In any one of the above schemes, preferably, the rotary compressing assembly includes a corner cylinder and a second compression rod, the corner cylinder is mounted on the second base, and a piston rod of the corner cylinder is connected with the center of the second compression rod.

In any one of the above embodiments, preferably, a connecting surface between the second pressing rod and the piston rod of the corner cylinder is a tapered surface.

In any of the above aspects, preferably, the corner cylinder is a 90 ° corner cylinder.

In any of the above schemes, preferably, the two opposite ends of the inner periphery of the annular pressing block are provided with grooves matched with the two ends of the first pressing rod.

In any of the above schemes, preferably, a plurality of positioning columns are circumferentially arranged on the periphery of the through hole, and a plurality of positioning holes matched with the positioning columns are formed in the annular pressing block.

Compared with the prior art, the utility model has the advantages and beneficial effects do:

1. through being equipped with and compressing tightly the subassembly and the rotatory subassembly that compresses tightly, can realize compressing tightly and the release to the work piece, adopt the bolt tightening fixed mode to compare with current manual work, easy operation uses manpower sparingly, simplifies the operation process greatly, improves production efficiency.

2. The center of the molding groove is provided with a mounting hole, and a fastener is arranged in the mounting hole. When the workpiece is placed on the first clamping seat, the center of the workpiece corresponds to the center of the forming groove, when four corners of the workpiece are pressed through the pressing assembly, the center of the workpiece is fixed with the first clamping seat through the screws, so that the workpiece is prevented from deforming during machining and forming, and the machining quality of the workpiece is guaranteed.

3. A plurality of positioning columns are circumferentially arranged on the periphery of the through hole, and a plurality of positioning holes matched with the positioning columns are formed in the annular pressing block. The setting of reference column is in order to realize the location to work piece and annular briquetting, guarantees the quick placing of work piece and annular briquetting.

The positioning fixture for processing the bicycle chain wheel of the present invention will be further described with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic structural view of a first fixture of the positioning fixture for machining a bicycle chain wheel of the present invention;

FIG. 2 is a top view of a first fixture of the positioning fixture for machining a bicycle chain wheel of the present invention;

FIG. 3 is a side view of a first fixture of the positioning fixture for machining a bicycle chain wheel of the present invention;

FIG. 4 is a schematic structural view of a second fixture of the positioning fixture for machining a bicycle chain wheel of the present invention;

FIG. 5 is a top view of a second fixture of the positioning fixture for machining a bicycle chain wheel of the present invention;

FIG. 6 is a side view of a second fixture of the positioning fixture for machining a bicycle chain wheel of the present invention;

FIG. 7 is a cross-sectional view of the connection between the second compression bar and the piston rod of the corner cylinder in the positioning fixture for processing the bicycle crankset of the present invention;

wherein: 1. a first base; 2. a first upright post; 3. a first holder; 4. a lifting cylinder; 5. a first pressure lever; 6. forming a groove; 7. mounting holes; 8. a second base; 9. a second upright post; 10. a second holder; 11. an annular pressing block; 111. a groove; 112. positioning holes; 12. a corner cylinder; 13. a second compression bar; 14. and (5) a workpiece.

Detailed Description

The utility model provides a positioning fixture is used in processing of bicycle chain wheel, including first anchor clamps, second anchor clamps. The positioning fixture of this embodiment uses with the cooperation of digit control machine tool to be used for the fixed of adding man-hour to the chain wheel, because the structure of the fashioned chain wheel positive and negative of processing is different, consequently add man-hour same chain wheel and need adopt two kinds of positioning fixture, first anchor clamps, second anchor clamps promptly. The first clamp is used for processing the front side of the chain wheel, and the second clamp is used for processing the back side of the chain wheel.

When the chain wheel is processed, the front side of the chain wheel is processed firstly, and then the back side of the chain wheel is processed. Wherein, before the front face of the chain wheel is processed, the workpiece 14 is a square plate.

As shown in fig. 1-3, the first fixture includes a first base 1, a first upright column 2, a first clamping seat 3 and a pressing assembly, the first clamping seat 3 is fixed on the first base 1 through the first upright column 2, a forming groove 6 is provided on the first clamping seat 3, the pressing assembly is provided on the periphery of the first clamping seat 3 to press or release a workpiece 14, and the workpiece 14 is placed on the first clamping seat 3. Wherein, the shape of the forming groove 6 is matched with the shape of the chain wheel to be formed.

As shown in fig. 4-6, the second fixture includes a second base 8, a second column 9, a second holder 10, an annular pressing block 11 and a rotary pressing assembly, the second holder 10 is fixed on the second base 8 through the second column 9, a through hole is formed in the second holder 10, the annular pressing block 11 is arranged on the second holder 10 and concentric with the through hole, the rotary pressing assembly is arranged in the through hole and fixed on the second base 8, and the rotary pressing assembly can press or release the annular pressing block 11.

Specifically, when the front face of the dental disc is processed, the square plate workpiece 14 is placed on the first clamping seat 3, the center of the square plate corresponds to the center of the forming groove 6, the square plate workpiece 14 is pressed and fixed through the pressing assembly and is processed through the numerical control machine tool, and after the processing is completed, the pressing assembly releases the workpiece 14. When processing, four corners of the square workpiece 14 are not processed, so as to ensure the pressing of the pressing component on the workpiece 14.

When processing the chain wheel reverse side, the rotatory subassembly that compresses tightly releases annular briquetting 11, take out annular briquetting 11, place the square work piece 14 that above-mentioned processing was accomplished on second holder 10 simultaneously, the center of square work piece 14 corresponds with the center of through-hole, and put down annular briquetting 11, the rotatory subassembly that compresses tightly the back to annular briquetting 11, the digit control machine tool is processed square work piece 14, after the processing was accomplished, the rotatory subassembly that compresses tightly releases annular briquetting 11, in proper order with annular briquetting 11, work piece 14 take out can, accomplish the whole course of working of chain wheel from this.

The utility model discloses a positioning fixture is used in processing of bicycle chain wheel compresses tightly the subassembly and the rotatory subassembly that compresses tightly through being equipped with, can realize compressing tightly and releasing work piece 14, adopts the bolt tightening fixed mode to compare with current manual work, and easy operation uses manpower sparingly, simplifies the operation process greatly, improves production efficiency.

Further, compress tightly the subassembly and include lift cylinder 4, first depression bar 5, lift cylinder 4 installs on first base 1, and lift cylinder 4's piston rod and first depression bar 5's end connection. The first pressure rod 5 realizes lifting movement under the pushing action of the lifting cylinder 4, so that the workpiece 14 is pressed or released.

Further, the center of the molding groove 6 is provided with a mounting hole 7, and a fastening piece is arranged in the mounting hole 7, wherein the fastening piece is a screw. When the workpiece 14 is placed on the first clamping seat 3, the center of the workpiece corresponds to the center of the forming groove 6, and when four corners of the workpiece 14 are pressed through the pressing components, the center of the workpiece 14 is fixed with the first clamping seat 3 through screws, so that the workpiece 14 is prevented from deforming during machining and forming, and the machining quality of the workpiece 14 is guaranteed.

Furthermore, the rotary compressing assembly comprises a corner cylinder 12 and a second compression rod 13, the corner cylinder 12 is mounted on the second base 8, and a piston rod of the corner cylinder 12 is connected with the center of the second compression rod 13. The opposite ends of the inner periphery of the annular pressing block 11 are provided with grooves 111 matched with the two ends of the first pressing rod 5. The corner cylinder 12 is a 90 ° corner cylinder 12.

When the corner cylinder 12 is in a reset state, two ends of the second pressure lever 13 are matched with the grooves 111 on the annular pressing block 11, at the moment, the annular pressing block 11 is in a release state, and the workpiece 14 is taken and placed by taking and placing the annular pressing block 11.

The corner cylinder 12 rotates 90 degrees and rises, the second pressure lever 13 rotates 90 degrees and rises, two ends of the second pressure lever 13 press the annular pressing block 11, and at the moment, the annular pressing block 11 is in a pressing state, so that the workpiece 14 is pressed.

Further, as shown in fig. 7, the connection surface of the second pressing rod 13 and the piston rod of the corner cylinder 12 is a conical surface, so that the connection between the second pressing rod 13 and the piston rod is more tight.

Furthermore, a plurality of positioning columns are circumferentially arranged on the periphery of the through hole, and a plurality of positioning holes 112 matched with the positioning columns are formed in the annular pressing block 11. The positioning columns are arranged to position the workpiece 14 and the annular pressing block 11, so that the workpiece 14 and the annular pressing block 11 are placed quickly.

The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.

Claims

1. The utility model provides a positioning fixture is used in processing of bicycle chain wheel which characterized in that: comprises a first clamp and a second clamp,

2. The positioning jig for processing a bicycle crankset as set forth in claim 1, wherein: the compressing assembly comprises a lifting cylinder and a first pressing rod, the lifting cylinder is installed on the first base, and a piston rod of the lifting cylinder is connected with the end of the first pressing rod.

3. The positioning jig for processing a bicycle crankset as set forth in claim 1, wherein: the center of the molding groove is provided with a mounting hole, and a fastening piece is arranged in the mounting hole.

4. The positioning jig for processing a bicycle crankset as set forth in claim 1, wherein: the rotary compression assembly comprises a corner cylinder and a second compression rod, the corner cylinder is mounted on the second base, and a piston rod of the corner cylinder is connected with the center of the second compression rod.

5. The positioning jig for processing a bicycle crankset as set forth in claim 4, wherein: and the connecting surface of the second pressure lever and the piston rod of the corner cylinder is a conical surface.

6. The positioning jig for processing a bicycle crankset as set forth in claim 4, wherein: the corner cylinder is a 90-degree corner cylinder.

7. The positioning jig for processing a bicycle crankset as set forth in claim 2, wherein: and grooves matched with the two ends of the first pressure rod are formed in the two opposite ends of the inner periphery of the annular pressure block.

8. The positioning jig for processing a bicycle crankset as set forth in claim 1, wherein: the periphery of through-hole circumference is equipped with a plurality of reference columns, be equipped with a plurality of on the annular briquetting with reference column looks adaptation's locating hole.