CN212217126U - A chuck structure for fast clamping of shaft workpieces - Google Patents

Abstract

The utility model provides a chuck structure for quickly clamping shaft workpieces, belonging to the technical field of machinery. The chuck structure is a cylindrical body, one end of the body is open, a hollow sleeve is arranged in the body, the peripheral surface of the sleeve is connected with the thread in the middle of the inner wall of the body, and the end surface of the sleeve close to the open end of the body has a spiral groove. A number of guide blocks are evenly arranged on the circumferential direction of the end face close to the opening end, and a caliper is slidably connected to the guide block along the radial direction of the body. A stepped hole, a pressing block is threadedly connected in the stepped hole, a plurality of guide rods located at the eccentric positions of the pressing block are fixedly arranged on the pressing block, and the bottom of the main body is provided with a guide hole corresponding to the guide rod. The utility model has the advantages of high efficiency.

Description

A chuck structure for fast clamping of shaft workpieces

technical field

The utility model belongs to the technical field of machinery, and relates to a chuck structure for quickly clamping shaft workpieces.

Background technique

In the process of machining shaft workpieces, it is necessary to clamp the workpiece first. The clamping accuracy has a great influence on the machining accuracy, and the clamping efficiency has a great influence on the machining efficiency. The existing clamping tools for shaft workpieces are generally It is achieved by adjusting the clamping gap through multiple sliding calipers, and then fixing the adjusted calipers. However, the workpiece is easily loosened under the action of vibration and non-axial external force during processing, which seriously affects the processing efficiency and Precision.

Utility model content

The purpose of the present invention is to provide a chuck structure for fast clamping of shaft workpieces in view of the above problems existing in the prior art.

The purpose of the utility model can be achieved through the following technical solutions: a chuck structure for quickly clamping shaft workpieces, characterized in that the chuck structure has a cylindrical body, one end of the body is open, and the body is inside A hollow sleeve is provided, the peripheral surface of the sleeve is connected with the thread in the middle of the inner wall of the main body, the end surface of the sleeve close to the open end of the main body has a spiral groove, and the end surface of the main body close to the open end is uniformly arranged on the circumference There are several guide blocks, and a caliper is slidably connected to the guide block along the radial direction of the body. The caliper has a number of threaded ribs corresponding to the spiral grooves. The end of the sleeve close to the bottom of the body has a stepped hole. A pressure block is threadedly connected to the stepped hole, and a plurality of guide rods located at the eccentric positions of the pressure block are fixedly arranged on the pressure block, and guide holes corresponding to the guide rods are provided at the bottom of the main body.

Directly insert the shaft workpiece from the opening end of the body, the pressure plate is pressed to translate to the bottom of the body, and the sleeve is driven to rotate. The caliper moves along the guide block to the axis of the body, and multiple calipers move synchronously to clamp the shaft workpiece, and the end of the shaft workpiece is also well straightened. In the whole process, the shaft workpiece does not need other Tool or manual operation, only need to directly insert the shaft workpiece, the efficiency is very high, and the clamping is reliable. During the processing of the shaft workpiece, the effect of the axial external force will only further increase the caliper's effect on the shaft workpiece. The clamping strength will not be loose, and the characteristic is that when the shaft workpiece is drilled in the axial direction, the firmness and coaxiality are extremely high.

In the above-mentioned chuck structure for quickly clamping shaft workpieces, a return spring is connected between the pressing block and the bottom of the body.

After the shaft workpiece is taken out, the return spring can reset the pressure plate, move the caliper outward, and restore the state before clamping again.

In the above-mentioned chuck structure for quickly clamping shaft workpieces, the bottom of the body is provided with a plurality of mutual avoidance grooves, and the end surface of the sleeve close to the bottom of the body is uniformly provided with a plurality of avoidance grooves in the circumferential direction corresponding positioning holes.

In order to quickly dismantle the workpiece, set the avoidance groove and positioning hole, insert the wrench into the avoidance groove, and insert it into the positioning hole, since the positioning hole is at the eccentric position of the body, the sleeve can be loosened by reverse rotation The clamping of the workpiece by the caliper.

In the above-mentioned chuck structure for quickly clamping shaft workpieces, the thread rise angle of the threads on the peripheral surface of the pressing block is greater than the thread rise angle of the threads on the peripheral surface of the sleeve.

By means of the large thread driving the small thread, the workpiece can be sensitively driven to move the pressing plate during insertion, so that the sleeve rotates.

Description of drawings

Figure 1 is a schematic plan view of the chuck structure.

Fig. 2 is a cross-sectional view of the chuck structure of the present invention.

In the figure, 1. Body; 2. Sleeve; 3. Spiral groove; 4. Guide block; 5. Caliper; 6. Pressure block; 7. Guide rod; 8. Return spring; 9. Avoidance groove; 10. Positioning hole .

Detailed ways

The following are specific embodiments of the present utility model combined with the accompanying drawings to further describe the technical solutions of the present utility model, but the present utility model is not limited to these embodiments.

As shown in FIG. 1 and FIG. 2 , in the cylindrical body 1 of the chuck structure, one end of the body 1 is open, a hollow sleeve 2 is arranged in the body 1, and the peripheral surface of the sleeve 2 is connected with the thread in the middle of the inner wall of the body 1. The end surface of the sleeve 2 close to the open end of the body 1 has a spiral groove 3, and the end surface of the body 1 close to the open end is provided with a number of guide blocks 4 in the circumferential direction, and the guide block 4 is slidably connected along the radial direction of the body 1. , the caliper 5 has a number of threaded ribs corresponding to the spiral groove 3, the end of the sleeve 2 close to the bottom of the body 1 has a stepped hole, the stepped hole is threadedly connected with a pressure block 6, and the pressure block 6 is fixed with a number of The guide rod 7 located at the eccentric position of the pressing block 6 has a guide hole corresponding to the guide rod 7 at the bottom of the body 1 .

Insert the shaft workpiece directly from the opening end of the main body 1, the pressure plate is pressed to translate to the bottom of the main body 1, and the sleeve 2 is driven to rotate. Under the interaction of the ribs, the caliper 5 moves along the guide block 4 to the axis of the body 1, and multiple calipers 5 move synchronously to clamp the shaft workpiece, and the end of the shaft workpiece is also well straightened. , In the whole process, the shaft workpiece does not need other tools or manual operation, only need to insert the shaft workpiece directly, the efficiency is very high, and the clamping is reliable. It will further increase the clamping strength of the caliper 5 to the shaft workpiece, and there will be no loosening.

A return spring 8 is connected between the pressing block 6 and the bottom of the body 1 . After the shaft workpiece is taken out, the return spring 8 can reset the pressing plate, move the caliper 5 outward, and restore the state before clamping again.

The bottom of the body 1 is provided with a plurality of mutual avoidance grooves 9 , and the end surface of the sleeve 2 near the bottom of the body 1 is provided with a plurality of positioning holes 10 corresponding to the avoidance grooves 9 uniformly in the circumferential direction. In order to dismantle the workpiece quickly, an escape groove 9 and a positioning hole 10 are provided, and a wrench is inserted into the escape groove 9 and into the positioning hole 10. Since the positioning hole 10 is at the eccentric position of the body 1, the sleeve 2 is pulled. Reverse rotation can release the clamping of the workpiece by the caliper 5.

The thread lead angle of the thread on the peripheral surface of the pressing block 6 is greater than the thread lead angle of the thread on the peripheral surface of the sleeve 2 . By means of the large thread driving the small thread, the workpiece can be sensitively driven to move the pressing plate during insertion, so that the sleeve 2 can be rotated.

The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or replace them in similar ways, but will not deviate from the spirit of the present invention or go beyond the appended claims the defined range.

Claims (4)

1. The chuck structure for rapidly clamping shaft workpieces is characterized in that a cylindrical body (1) of the chuck structure is provided with an opening at one end of the body (1), a hollow sleeve (2) is arranged in the body (1), the periphery of the sleeve (2) is in threaded connection with the middle of the inner wall of the body (1), a spiral groove (3) is formed in the end face, close to the opening end of the body (1), of the sleeve (2), a plurality of guide blocks (4) are uniformly arranged on the end face, close to the opening end, of the body (1) in the circumferential direction, calipers (5) are connected on the guide blocks (4) in a sliding mode along the radial direction of the body (1), a plurality of thread convex ribs corresponding to the spiral groove (3) are arranged on the calipers (5), a step hole is formed in one end, close to the bottom of the body (1), of the sleeve (2), and a pressing block (6) is connected to, the pressing block (6) is fixedly provided with a plurality of guide rods (7) located at the eccentric positions of the pressing block (6), and the bottom of the body (1) is provided with guide holes corresponding to the guide rods (7).

2. The chuck structure for rapidly clamping shaft workpieces according to claim 1, wherein a return spring (8) is connected between the pressing block (6) and the bottom of the body (1).

3. The chuck structure for rapidly clamping shaft workpieces according to claim 1 or 2, wherein a plurality of avoiding grooves (9) are formed in the bottom of the body (1), and a plurality of positioning holes (10) corresponding to the avoiding grooves (9) are uniformly formed in the circumferential direction on the end surface, close to the bottom of the body (1), of the sleeve (2).

4. The chuck structure for rapidly clamping shaft workpieces according to claim 1, wherein the lead angle of the threads on the circumferential surface of the pressing block (6) is larger than that of the threads on the circumferential surface of the sleeve (2).

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