CN214923684U - Clamping tool placed in middle - Google Patents

Abstract

The utility model provides a press from both sides tight frock placed in middle, include: a base; the pair of pressing blocks are used for rotating in opposite directions to clamp the workpiece, the pressing blocks are symmetrically hinged to the base through the rotating shaft, and each pressing block comprises a clamping edge and an edge pressing which form an included angle and are fixedly connected; a cavity for rotating the pressing edge is arranged in the base; the eccentric shaft is arranged on the base and used for enabling the pressing blocks to rotate in opposite directions, the installation direction of the eccentric shaft is perpendicular to the rotating shaft, the eccentric shaft comprises a first shaft wall close to the center of a circle and a second shaft wall far away from the center of a circle, and when the eccentric shaft is rotated, the second shaft wall simultaneously downwards extrudes the blank pressing of the pair of pressing blocks so as to enable the pair of pressing blocks to rotate in opposite directions until the workpiece is clamped. The utility model discloses can press from both sides tight work piece fast, accurately placed in the middle, and labour saving operation.

Description

Clamping tool placed in middle

Technical Field

The utility model belongs to the technical field of the frock, concretely relates to press from both sides tight frock placed in middle.

Background

In the processes of machining, assembling and part detection, in order to improve the operation precision, a symmetrical center line of a target object is often found first, and then subsequent machining, assembling or detection work is performed.

For example, patent document No. CN202020528230.6 discloses a centering tool and a centering structure for a side pushing device, which includes a tool shaft, the tool shaft includes a shaft body, an upper flange and a lower flange, the upper flange and the lower flange are respectively and fixedly connected with the upper end and the lower end of the shaft body, the upper flange and the lower flange are provided with a plurality of mounting holes, and the upper flange is provided with a dial indicator. This side pusher centering frock, a centering for the side pusher, replace the jackshaft centering through the frock axle, traditional centering in-process, the activity of lower extreme spindle nose is difficult to fix on the jackshaft, lead to centering data inaccurate easily, adopt the centering of frock axle, go up flange and lower flange and axis body fixed connection, be convenient for frock axle holistic fixed and location, and install the percentage table on the last flange, measure the position of adjusting motor according to the percentage table, thereby improve centering precision, make the mounted position of motor satisfy the demands, dismantle the frock axle at last, install the jackshaft between screw device and motor.

However, the centering tool needs to read the reading of the dial indicator and then manually adjust the position of the motor according to the reading, cannot realize automatic centering, needs to be continuously adjusted for many times, has low operation efficiency, inevitably has errors according to the manual reading, and is difficult to effectively ensure the operation precision.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a press from both sides tight frock placed in middle to realize that high efficiency, high accuracy ground press from both sides tightly the work piece placed in the middle.

The utility model provides a following technical scheme:

the utility model provides a clamp frock placed in middle, includes:

a base;

the pair of pressing blocks are used for rotating oppositely to clamp the workpiece, the pressing blocks are symmetrically hinged to the base through a rotating shaft, and each pressing block comprises a clamping edge and an edge pressing which form an included angle and are fixedly connected; a cavity for the blank pressing to rotate is formed in the base;

the eccentric shaft is arranged on the base and used for enabling the pressing blocks to rotate oppositely, the installation direction of the eccentric shaft is perpendicular to the rotating shaft, the eccentric shaft comprises a first shaft wall close to the center of a circle and a second shaft wall far away from the center of a circle, and when the eccentric shaft is rotated, the second shaft wall simultaneously downwards extrudes the pressing edges of the pair of pressing blocks so as to enable the pair of pressing blocks to rotate oppositely until a workpiece is clamped.

Preferably, the pressing block and the eccentric shaft are arranged in a staggered manner from front to back.

Preferably, a return spring is installed in the cavity and presses the blank holder upwards to maintain the follow-up relationship between the blank holder and the eccentric shaft.

Preferably, the bottom of blank holder is equipped with first cell body, be equipped with on the base in the cavity with the second cell body that first cell body is relative, reset spring's upper and lower both ends are fixed in respectively first cell body with in the second cell body.

Preferably, the eccentric shaft comprises a shaft handle and a shaft body which are eccentrically connected, a bearing seat used for supporting the shaft handle is arranged on the base, and the shaft handle is rotatably arranged on the bearing seat; the shaft body is located in the cavity of the base, and the first shaft wall and the second shaft wall are located on the shaft body.

Preferably, a transmission shaft is installed on the pressing edge, extends into the lower portion of the shaft body and is tightly attached to the outer circumferential wall of the shaft body.

Preferably, the transmission shaft extends horizontally in a direction perpendicular to the shaft body.

Furthermore, the top of the bearing seat is provided with a sunken limiting step, a convex stop pin is arranged above the limiting step on the shaft handle, and the stop pin can abut against the limiting step to limit the rotation angle of the shaft handle.

Preferably, the rotating shaft is mounted on the pressing edge, the base is provided with an insertion hole for inserting the pressing edge, and the pressing edge can rotate in the insertion hole.

Preferably, the clamping edge and the pressing edge are mutually and vertically connected.

The utility model has the advantages that: the utility model discloses articulate a pair of briquetting on the base symmetrically, install the eccentric shaft simultaneously on the base, when the primary shaft wall of eccentric shaft is down, the contained side interval of two briquettings is great, can place the work piece between two contained sides, when the secondary shaft wall of eccentric shaft is down, extrudees two blank pressing downwards simultaneously, makes a pair of briquetting take place simultaneously and rotates in opposite directions, and turned angle the same, consequently can press from both sides tight work piece between two parties.

The utility model discloses only can realize pressing from both sides tightly between two parties through rotating the eccentric shaft, simple structure, the tight action of clamp is fast between two parties, and the operation is light laborsaving.

The pressing block and the eccentric shaft of the utility model are arranged in a staggered way from front to back, and the actions of the pressing block and the eccentric shaft are not interfered with each other; and install a transmission shaft on the blank holder of briquetting, the transmission shaft extends to the below of eccentric shaft forward and hugs closely the eccentric shaft, consequently can follow the axis body bottom altitude variation of eccentric shaft and reciprocate to on transmitting the briquetting with the moment that reciprocates, the drive briquetting revolves the rotation of axes, this frock structure is ingenious, presss from both sides tight effect reliable and stable.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic cross-sectional view of the inside of the present invention;

fig. 3 is a schematic longitudinal sectional view of the inside of the present invention.

Labeled as: 1. a base; 2. briquetting; 3. an eccentric shaft; 4. a return spring; 5. a drive shaft; 6. a cavity; 7. a jack; 8. a rotating shaft; 9. clamping edges; 10. pressing edges; 11. a mandrel; 12. a shaft body; 13. a bearing seat; 14. a first shaft wall; 15. a second shaft wall; 16. a first tank body; 17. a second tank body; 18. a limiting step; 19. a stop pin; 20. and (5) a workpiece.

Detailed Description

Example 1

As shown in fig. 1 to 3, the centering clamping tool comprises a base 1, a pressing block 2, an eccentric shaft 3, a return spring 4 and a transmission shaft 5.

A cavity 6 is formed in the base 1, the front side of the cavity 6 is open, processing is convenient, and jacks 7 are formed in the left side wall and the right side wall of the cavity 6. A pair of briquetting 2 hinges on base 1 through pivot 8 symmetry, and briquetting 2 includes each other contained angle and fixed connection's clamp 9 and blank pressing 10, and preferred clamp 9 is 90 with the contained angle of blank pressing 10, also can be other angles. The blank pressing 10 extends into the cavity 6 through the insertion hole 7, and a movable gap is reserved between the blank pressing 10 and the insertion hole 7, so that the blank pressing 10 can rotate in the insertion hole 7.

The eccentric shafts 3 for rotating the pressing blocks 2 toward each other are installed on the base 1, preferably, the eccentric shafts are installed horizontally, and the installation direction of the eccentric shafts 3 is perpendicular to the rotating shaft 8. The eccentric shaft 3 comprises a shaft handle 11 and a shaft body 12 which are connected eccentrically, a bearing seat 13 used for supporting the shaft handle 11 is arranged on the base 1, the shaft handle 11 is rotatably arranged on the bearing seat 13, and the shaft body 12 can be driven to rotate synchronously by rotating the shaft handle 11. The shaft body 12 is positioned in the cavity 6 of the base, the shaft body 12 comprises a first shaft wall 14 close to the center of a circle and a second shaft wall 15 far from the center of a circle, when the eccentric shaft 3 is rotated, the second shaft wall 15 simultaneously presses the pressing edges 10 of the pair of pressing blocks downwards so as to enable the pair of pressing blocks 2 to rotate towards each other until the workpiece 20 is simultaneously clamped, and the workpiece 20 can be clamped in the middle due to the fact that the rotating angles of the pair of pressing blocks 2 are the same.

The pressing block 2 and the eccentric shaft 3 are arranged in a staggered mode from front to back to prevent the actions of the pressing block and the eccentric shaft from interfering.

The cavity 6 is internally provided with a return spring 4, the return spring 4 upwards extrudes the blank holder 10, so that the blank holder 10 and the eccentric shaft maintain a follow-up relationship, namely, in the rotating process of the eccentric shaft 3, the blank holder 10 can always apply upward pressure to the shaft body 12 of the eccentric shaft. When the first axial wall 14 faces downwards, the pair of pressing blocks 2 are in an opening state, and when the second axial wall 15 faces downwards, the pair of pressing blocks 2 are in a clamping state,

specifically, the bottom of blank holder 10 is equipped with first cell body 16, is equipped with the second cell body 17 relative with first cell body 16 on base 1 in cavity 6, and reset spring 4's upper and lower both ends are fixed in first cell body 16 and second cell body 17 respectively in, prevent that reset spring 4 from taking place the displacement.

Because the pressing block 2 and the eccentric shaft 3 are arranged in a staggered manner, a transmission shaft 5 is arranged on the pressing edge 10, and the transmission shaft 5 extends into the lower part of the shaft body 12 and is tightly attached to the outer circumferential wall of the shaft body 12. The propeller shaft 5 may extend leftward, rightward, or straight forward, and preferably the propeller shaft 5 extends horizontally in a direction perpendicular to the shaft body 8 to transmit torque more efficiently. Under the effect of reset spring 4, transmission shaft 5 can follow the 12 bottom altitude variations of axis body of eccentric shaft and reciprocate to on transmitting briquetting 2 with the moment of reciprocating, drive briquetting 2 is rotatory around 8 axles.

The working principle of the tool is as follows:

placing a workpiece 20 between the two pressing blocks 2 and supported by the top of the base 1;

the shaft handle 11 of the eccentric shaft is rotated to drive the shaft body 12 to eccentrically rotate, the transmission shaft 5 moves up and down along with the change of the bottom height of the shaft body under the extrusion of the reset spring 4 to drive the pressing edge 10 to move up and down, and the two pressing blocks 2 are symmetrically arranged, so that the two pressing blocks 2 rotate around the rotating shaft 8 by the same angle at the same time to clamp a workpiece in the middle.

Example 2

The top of the bearing seat 13 is provided with a sunken limit step 18, a convex stop pin 19 is fixedly arranged on the shaft handle 11 above the limit step 18, and when the shaft handle 11 rotates, the stop pin 19 can abut against the limit step 18 to limit the rotation angle of the shaft handle 11 so as to provide proper clamping force for the pressing block 2.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a press from both sides tight frock placed in middle which characterized in that includes:

a base;

the pair of pressing blocks are used for rotating oppositely to clamp the workpiece, the pressing blocks are symmetrically hinged to the base through a rotating shaft, and each pressing block comprises a clamping edge and an edge pressing which form an included angle and are fixedly connected; a cavity for the blank pressing to rotate is formed in the base;

the eccentric shaft is arranged on the base and used for enabling the pressing blocks to rotate oppositely, the installation direction of the eccentric shaft is perpendicular to the rotating shaft, the eccentric shaft comprises a first shaft wall close to the center of a circle and a second shaft wall far away from the center of a circle, and when the eccentric shaft is rotated, the second shaft wall simultaneously downwards extrudes the pressing edges of the pair of pressing blocks so as to enable the pair of pressing blocks to rotate oppositely until a workpiece is clamped.

2. The centering clamping tool according to claim 1, wherein the pressing block and the eccentric shaft are arranged in a staggered manner from front to back.

3. The center clamping tool according to claim 2, wherein a return spring is mounted in the cavity and presses the blank holder upwards to maintain a follow-up relationship between the blank holder and the eccentric shaft.

4. The centering clamping tool according to claim 3, wherein a first groove body is arranged at the bottom of the blank holder, a second groove body opposite to the first groove body is arranged in the cavity on the base, and the upper end and the lower end of the return spring are respectively fixed in the first groove body and the second groove body.

5. The center clamping tool according to claim 3, wherein the eccentric shaft comprises a shaft shank and a shaft body which are eccentrically connected, a bearing seat for supporting the shaft shank is arranged on the base, and the shaft shank is rotatably mounted on the bearing seat; the shaft body is located in the cavity of the base, and the first shaft wall and the second shaft wall are located on the shaft body.

6. The center clamping tool according to claim 5, wherein a transmission shaft is mounted on the pressing edge, extends into the lower portion of the shaft body and is tightly attached to the outer circumferential wall of the shaft body.

7. The center clamping tool according to claim 6, wherein the transmission shaft extends horizontally in a direction perpendicular to the shaft body.

8. The center clamping tool according to claim 5, wherein a sunken limiting step is arranged at the top of the bearing seat, a convex stop pin is arranged above the limiting step on the mandrel, and the stop pin can abut against the limiting step to limit the rotation angle of the mandrel.

9. The centering clamping tool according to any one of claims 1 to 8, wherein the rotating shaft is mounted on the pressing edge, the base is provided with an insertion hole for inserting the pressing edge, and the pressing edge can rotate in the insertion hole.

10. The centered clamping fixture according to any one of claims 1 to 8, wherein the clamping edge and the pressing edge are connected perpendicularly to each other.

Images