CN215659698U

CN215659698U - Pneumatic type crank anchor clamps

Info

Publication number: CN215659698U
Application number: CN202121724661.0U
Authority: CN
Inventors: 巫仕平; 罗辉炎
Original assignee: Xiamen Litianxing Machinery Co ltd
Current assignee: Xiamen Litianxing Machinery Co ltd
Priority date: 2021-07-28
Filing date: 2021-07-28
Publication date: 2022-01-28
Anticipated expiration: 2031-07-28

Abstract

The application relates to a pneumatic crank clamp which comprises a rack, an air cylinder, a rack, a centering clamping mechanism and a gear, wherein the rack is formed by modifying a machine tool; the cylinder drives the rack to drive the gear to rotate, so that the elastic chuck in the centering and clamping mechanism contracts inwards to clamp the workpiece. This application has the effect that quick high efficiency presss from both sides tight crank.

Description

Pneumatic type crank anchor clamps

Technical Field

The application relates to the field of machine tool fixtures, in particular to a pneumatic type crank fixture.

Background

The crank, the part of the bicycle connected with the chain wheel, is provided with mounting holes at both ends of the crank, and is mainly used for connecting the pedal and the chain wheel.

In the prior art, in order to machine and polish the surface of the crank, the crank is usually horizontally fixed on a machine tool, is generally clamped by a clamping mode, and is generally manually screwed.

In view of the above-mentioned related art, the inventor believes that the clamping method is easy to loosen, and the manual tightening consumes a lot of physical strength of workers, resulting in low production efficiency, and the manual tightening may not meet the required requirements.

SUMMERY OF THE UTILITY MODEL

In order to improve the work efficiency of installing the crank on anchor clamps, this application provides a pneumatic type crank anchor clamps.

The application provides a pneumatic type crank anchor clamps adopts following technical scheme.

A pneumatic crank clamp, comprising:

a frame formed by machine tool retrofitting;

the air cylinder is arranged on the frame;

one end of the rack is arranged on the air cylinder;

the centering and clamping mechanism is arranged on the rack, and an elastic chuck is arranged in the centering and clamping mechanism;

the gear is arranged on the centering and clamping mechanism;

the cylinder drives the rack to drive the gear to rotate, so that the elastic chuck in the centering and clamping mechanism contracts inwards to clamp the workpiece.

Through adopting above-mentioned technical scheme, utilize the cylinder to drive the rack and then drive the gear rotatory to make collet chuck press from both sides tight work piece, need not manual collet chuck of screwing, can save workman's physical power by a wide margin and improve production efficiency.

Optionally, the method further includes:

the vertical block is arranged on the rack;

and the sliding groove is arranged on the vertical block, the sliding groove is connected with the rack in a sliding manner, and the rack sawtooth part is far away from the sliding groove.

Through adopting above-mentioned technical scheme, can play support and spacing effect to the rack through setting up the spout and prevent that the rack from deviating from original action route and then influencing gear revolve.

Optionally, the method further includes:

the support column is arranged on the rack, the axis of the support column is aligned with the axis of the centering and clamping mechanism, and the distance between the two axes is equal to the distance between the two mounting holes on the crank.

Through adopting above-mentioned technical scheme, can play the effect of location to the crank through setting up the support column, prevent that the crank from taking place the skew and then influencing the machining precision in the course of working.

Optionally, the support column includes:

the bottom of the support column part is provided with a threaded hole, a bolt is arranged on the stand platform, and the support column part is connected to the stand through threads;

the sleeve shaft is arranged at one end of the support part, the sleeve shaft is far away from the rack, and the shaft diameter of the sleeve shaft is smaller than that of the support part;

through adopting above-mentioned technical scheme, the pillar part plays the effect that supports to the crank, and threaded connection can make the support column change at any time between pillar part and the frame to adapt to the crank of different models, the sleeve shaft plays spacing effect to the crank.

Optionally, the support column further includes:

the rotating groove is provided with at least two and is arranged on the peripheral side of the strut part.

Through adopting above-mentioned technical scheme, through set up the dismantlement support column that the groove can be more convenient that rotates on the pillar portion.

Optionally, the method further includes:

the safety plate, two card holes have been seted up on the safety plate, the axle center in card hole aligns with the axle center of cover axle and centering clamping mechanism, overlaps at the cover epaxial the axle diameter that the axle diameter of card hole is greater than the cover axle is less than the axle diameter of pillar portion, the safety plate is installed on centering clamping mechanism's support column.

Through adopting above-mentioned technical scheme, can prevent through setting up the safety plate that the smear metal from getting into rack and pinion and then influencing rack and pinion's work, the safety plate can ensure workman's safety moreover, prevents that the workman from being cut by the hand carelessness when installing the work piece.

Optionally, the method further includes:

the locating block comprises a threaded portion and an inserting portion, the shaft diameter of the threaded portion is equal to that of the crank mounting hole, the threaded portion is in threaded connection with the crank, and the inserting portion is inserted into the centering clamping mechanism.

Through adopting above-mentioned technical scheme, can fix the crank on centering clamping mechanism through setting up the locating piece.

Optionally, the method further includes:

and the manual control valve is arranged on the air cylinder and is used for controlling the opening and closing of the air cylinder.

By adopting the technical scheme, the manual control valve can be used for conveniently controlling the starting and the closing of the air cylinder by a worker.

In summary, the present application includes at least one of the following beneficial technical effects:

by arranging the air cylinder and the gear rack and locking the elastic chuck by matching the gear rack, the labor intensity of workers can be reduced, and the production efficiency is effectively improved;

the crank can be arranged on the centering and clamping mechanism by arranging the positioning block;

through setting up the safety plate, can prevent that the smear metal from getting into rack and pinion, and can ensure workman's safety.

Drawings

FIG. 1 is a schematic diagram of a pneumatic crank clamp according to an embodiment of the present application;

FIG. 2 is a schematic view of the internal structure of a pneumatic crank clamp according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a support column according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a positioning block according to an embodiment of the present application;

fig. 5 is a schematic view of an actual working condition of a pneumatic crank clamp according to an embodiment of the present application.

Reference numerals: 1. a frame; 2. a cylinder; 3. a rack; 4. a centering and clamping mechanism; 41. an elastic collet; 5. a gear; 6. erecting a block; 61. a chute; 7. a support pillar; 71. a pillar section; 711. a threaded hole; 712. a rotating groove; 72. a sleeve shaft; 8. a security pane; 9. positioning blocks; 91. a threaded portion; 92. a plug-in part; 10. the valves are manually controlled.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a pneumatic crank clamp, referring to fig. 1 and 2, comprising a rack 1, a cylinder 2, a rack 3, a centering clamping mechanism 4 and a gear 5, wherein the rack 1 is formed by modifying a machine tool, the cylinder 2 is arranged on the rack 1, one end of the rack 3 is arranged on an extension rod of the cylinder 2, the cylinder 2 drives the rack 3 to do linear motion, the centering clamping mechanism 4 is arranged on the rack 1, a chuck of the centering clamping mechanism 4 adopts an elastic chuck 41, the elastic chuck 41 is used for centering the clamping mechanism 4, the workpiece is positioned and clamped by elastic deformation generated by stress of the elastic chuck 41 arranged on a chuck body or a mandrel, the elastic chuck 41 is used for centering the clamping mechanism 4 and comprises an outer clamping type and an inner clamping type, in the embodiment, the outer clamping type elastic chuck 41 is used for centering the clamping mechanism 4, the operating principle is that an operating lever rotates clockwise, the fastening nut, in cooperation with the external thread of the clamp body, pulls the collet 41 downward to cause the outer conical surface thereof to be squeezed by the inner conical surface of the clamp body, so that the collet 41 contracts inward to clamp the workpiece. When the operating lever is rotated anticlockwise, the fastening nut is unscrewed, the elastic chuck 41 expands outwards to loosen the workpiece, and the workpiece can be taken down; gear 5 installs on centering clamping mechanism 4, and gear 5 rack 3 mutually supports, and during operation, cylinder 2 drives rack 3 and is linear motion, and rack 3 drives gear 5 and rotates and then makes collet 41 expansion or shrink to make the work piece pressed from both sides tightly or by the shrink, utilize cylinder 2 and the cooperation of gear 5 rack 3, just need not the manual rotation action bars of workman, thereby save physical power, improve work efficiency.

Referring to fig. 1 and 2, a vertical block 6 is further arranged on the rack 1, the vertical block 6 is vertically arranged and is close to the centering and clamping mechanism 4, the vertical block 6 is far away from one end of the rack 1 and is fixedly connected with a sliding groove 61, the sliding groove 61 is in sliding connection with the rack 3, and the sliding groove 61 is arranged to limit the action track of the rack 3, so that the rack 3 is prevented from shifting and further affecting the meshing with the gear 5, and the elastic chuck 41 cannot be locked.

Referring to fig. 2 and 3, the rack 1 is further provided with a support column 7, the support column 7 includes a support column portion 71 and a sleeve shaft 72, the support column portion 71 is cylindrical, the shaft diameter of the support column portion 71 is larger than that of the sleeve shaft 72, the shaft diameter of the sleeve shaft 72 is equal to that of a positioning hole at the tail of the crank, the bottom of the support column portion 71 is provided with a threaded hole 711 and is in threaded connection with a bolt fixed on the rack 1, the sleeve shaft 72 is used for further fixing the crank, and the support column 7 can be detached, so that the support column 7 can be replaced according to the type of the crank, and when the support column 7 is damaged, the support column 7 can be directly replaced, and the maintenance cost is reduced;

the post part 71 is further provided with two rotating grooves 712, the two rotating grooves 712 are symmetrically arranged relative to the axis of the post part 71 and are arranged on the circumferential side surface of the post part 71, the surface of the post part 71 is smooth, so that the installation is not easy when the installation supporting column 7 is arranged on the rack 1, and the rotation supporting column 7 which can be more convenient through the arrangement of the rotating grooves 712 can be conveniently disassembled and assembled on the rack 1.

Referring to fig. 1, a safety plate 8 is mounted on a support column 7 and a centering and clamping mechanism 4, the safety plate 8 is provided with a plurality of clamping holes, the diameter of one clamping hole is equal to the diameter of a sleeve shaft 72, the diameter of the other clamping hole is equal to the maximum diameter of an elastic chuck 41 of the centering and clamping mechanism 4, the smaller clamping hole of the safety plate 8 is sleeved on the sleeve shaft 72, the other clamping hole is aligned with the axis of the centering and clamping mechanism 4 and covers the surface of the centering and clamping mechanism 4, chips can be effectively prevented from entering a gear 5 and a rack 3 to influence the movement of the gear 5 and the rack 3 by arranging the safety plate 8, and the safety plate 8 can reduce the probability that a worker is carelessly scraped by the gear 5 and the rack 3 during operation, so as to ensure the operation safety of the worker;

referring to fig. 4 and 5, the crank centering and clamping device further comprises a positioning block 9, the positioning block 9 is integrally arranged in a stepped shaft shape, the positioning block 9 comprises a threaded portion 91 and an insertion portion 92, the shaft diameter of the threaded portion 91 is equal to that of a positioning hole in the head portion of the crank, the tail portion of the insertion portion 92 is arranged in a flat shape, when the crank is installed in the centering and clamping mechanism 4, the threaded portion 91 of the positioning block 9 is screwed into the positioning hole of the crank, the insertion portion 92 is inserted into the centering and clamping mechanism 4, and the insertion portion 92 is arranged in a flat shape and can be clamped in the centering and clamping mechanism 4 more tightly.

Referring to fig. 2, a manual control valve 10 is installed on the cylinder 2, the opening and closing of the cylinder 2 can be controlled by the manual control valve 10, the manual control valve 10 is arranged away from the rack 3 and the gear 5, and the safety of a user can be ensured by arranging the manual control valve 10 away from the gear 5 and the rack 3.

The implementation principle of the pneumatic type crank anchor clamps of this application embodiment does: firstly, a positioning block 9 is connected to a crank, then a positioning hole of the crank is sleeved on a shaft sleeve, the positioning block 9 is inserted into a centering clamping mechanism 4, then a manual control valve 10 is used for controlling the starting of an air cylinder 2, the air cylinder 2 drives a rack 3 to do linear motion, the rack 3 drives a gear 5 to rotate, the gear 5 drives an elastic chuck 41 to contract so as to clamp the positioning block 9, so that the crank is fixed, when the crank is taken out, the air cylinder 2 drives the rack 3 to contract through the manual control valve 10, then the rack 3 drives the gear 5 to reversely rotate, so that the elastic chuck 41 is loosened, at the moment, the crank is manually taken out, and then the positioning block 9 is taken down from the crank.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A pneumatic crank clamp, comprising:

a machine frame (1), the machine frame (1) being formed by machine tool modification;

the air cylinder (2), the said air cylinder (2) is installed on framework (1);

one end of the rack (3) is arranged on the cylinder (2);

the centering and clamping mechanism (4), the centering and clamping mechanism (4) is installed on the rack (1), and an elastic chuck (41) is arranged in the centering and clamping mechanism (4);

and a gear (5), wherein the gear (5) is mounted on the centering and clamping mechanism (4);

the cylinder (2) drives the rack (3) to drive the gear (5) to rotate, so that the elastic chuck (41) in the centering and clamping mechanism (4) contracts inwards to clamp the workpiece.

2. A pneumatic crank clamp as claimed in claim 1, further comprising:

the vertical block (6), the said vertical block (6) is installed on framework (1);

and the sliding groove (61) is installed on the vertical block (6), the sliding groove (61) is connected with the rack (3) in a sliding mode, and the sawtooth part of the rack (3) is far away from the sliding groove (61).

3. A pneumatic crank clamp as claimed in claim 1, further comprising:

the support column (7), support column (7) set up in frame (1), the axis of support column (7) aligns with the axis of centering clamping mechanism (4), and the distance between the two axes equals the distance between two mounting holes on the crank.

4. A pneumatic crank clamp according to claim 3, characterized in that the support column (7) comprises:

the bottom of the support part (71) is provided with a threaded hole (711), a platform of the rack (1) is provided with a bolt, and the support part (71) is in threaded connection with the rack (1);

the sleeve shaft (72) is arranged at one end of the support part (71), the sleeve shaft (72) is far away from the machine frame (1), and the shaft diameter of the sleeve shaft (72) is smaller than that of the support part (71);

and a rotation groove (712), the rotation groove (712) being provided at least two, the rotation groove (712) being provided on the peripheral side of the pillar portion (71).

5. A pneumatic crank clamp as claimed in claim 4, further comprising:

the safety plate (8), two card holes have been seted up on safety plate (8), the axle center in card hole aligns with the axle center of cover axle (72) and centering clamping mechanism (4), overlaps on cover axle (72) the axle diameter in card hole is greater than the axle diameter that the axle diameter of cover axle (72) is less than the axle diameter of pillar portion (71), install on the support column (7) of centering clamping mechanism (4) safety plate (8).

6. A pneumatic crank clamp as claimed in claim 1, further comprising:

the positioning block (9) comprises a threaded portion (91) and an inserting portion (92), the shaft diameter of the threaded portion (91) is equal to that of an installation hole in the crank, the threaded portion (91) is in threaded connection with the crank, and the inserting portion (92) is inserted into the centering clamping mechanism (4).

7. A pneumatic crank clamp as claimed in claim 1, further comprising:

the manual control valve (10), manual control valve (10) is installed on cylinder (2), manual control valve (10) is used for controlling the switching of cylinder (2).