CN206215936U - The elastic top fixture of control is moved forward and backward using tailstock centre - Google Patents

Abstract

The utility model is related to a kind of utilization tailstock centre to move forward and backward the elastic top fixture of control, including the chuck body being installed on lathe spindle, chuck body front end is hinged with least two claws, be provided with the mesopore of chuck body front end and be slidably matched and be used to head on the top of workpiece one end with it, the claw rear end bend inwards and close to top rear end to realize that the inside top pressure of workpiece is top when claw rear end outside draw its front end in hold workpiece tightly.The utility model moves forward and backward the elastic top fixture of control and lathe parking is not needed when clamping workpiece is carried out, it is necessary to pass through to move the i.e. achievable clamping of tailstock centre and unclamp using tailstock centre, reduces the clamping workpiece time, greatly improves production efficiency.

Description

Use the tailstock to move back and forth to control the tightness of the top clamp

technical field

The utility model relates to a lathe clamp, in particular to a top clamp which utilizes the front and rear movement of the top of a tailstock to control the tightness.

Background technique

In the prior art, when lathes are used to process slender rods or pipes, the top chuck is generally used to cooperate with the top of the tailstock on the lathe to clamp the workpiece. At present, the commonly used top chuck is used when disassembling the workpiece Need to stop the lathe, resulting in a significant drop in work efficiency, especially in mass production.

Utility model content

In view of this, the purpose of this utility model is to provide a novel top clamp which utilizes the front and rear movement of the top of the tailstock to control the tension, so as to reduce the clamping time of the workpiece and effectively improve the production efficiency.

The utility model adopts the following schemes to realize: a top clamp that utilizes the front and back movement of the top of the tailstock to control the tension, including a chuck body installed on the main shaft of the lathe, at least two claws are hinged at the front end of the chuck body, and the front end of the chuck body The hole is provided with a tip that slides with it and is used to bear against one end of the workpiece. The rear end of the jaw is bent inward and sticks to the rear end of the tip to realize that when the workpiece presses the tip inward, the rear end of the jaw is stretched outward to make it The front end is gathered to hold the workpiece tightly.

Further, the middle hole of the chuck body is also provided with a slider located at the rear side of the tip and pushes the tip outward, and a spring for pushing the slider outward is also arranged in the middle hole of the chuck body; the front end of the jaw The inner side has an arc-shaped groove matched with the workpiece.

Further, the rear end of the tip has a hemispherical connection part, and the side part of the chuck body is provided with a relief groove communicating with the middle hole, and the rear end of the claw extends into the corresponding relief groove and sticks to the connection part. On the spherical surface; the slider is connected with the connecting part through a pin shaft.

Further, the front end of the chuck body is provided with at least two pairs of hinge ears, the middle part of the jaw is hinged on the hinge ears and the center of gravity of the jaw is located at the front side of the hinge part of the jaw.

Further, the claw is hinged to the hinge ear by a bolt, and the bolt is locked by a nut after passing through the claw and the hinge ear.

Compared with the prior art, the utility model has the following beneficial effects: the utility model utilizes the tip of the tailstock to move back and forth to control the tightness of the tip clamp. When the workpiece is clamped, the lathe does not need to be stopped, and the clamping can be realized by moving the tip of the tailstock. Tightening and loosening, reducing the workpiece clamping time, increasing production efficiency by 2 to 3 times, and avoiding the lathe from affecting its performance and service life due to frequent start and stop.

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail through specific embodiments and related drawings below.

Description of drawings

Fig. 1 is a structural sectional view of the utility model embodiment;

Fig. 2 is the right view of Fig. 1;

Explanation of symbols in the figure: 1-Chuck body, 2-Claw, 3-Tip, 4-Workpiece, 5-Slider, 6-Spring, 7-Arc groove, 8-Connection part, 9-Give way groove, 10-pin shaft, 11-hinge ear, 12-bolt.

detailed description

As shown in Figures 1 and 2, a top clamp that utilizes the front and rear movement of the top of the tailstock to control the tightness includes a chuck body 1 installed on the spindle of the lathe, at least two jaws 2 are hinged at the front end of the chuck body 1, and the chuck The center hole at the front end of the main body 1 is provided with a tip 3 that slides with it and is used to bear against one end of the workpiece 4. The tip of the tailstock on the lathe is placed against the other end of the workpiece, and the rear end of the claw 2 is bent inward and is attached to the tip The rear end is to realize that the workpiece 4 presses the top 3 inwardly, and the rear end of the claw is stretched outward to make the front end close and hold the workpiece tightly. During the processing of the workpiece, one end of the workpiece is supported by the top 3, and the other end is supported by the top of the tailstock. , the workpiece can be disassembled only by moving the top of the tailstock on the lathe. When installing the workpiece, one end of the workpiece is inserted into the top chuck, and the other end is against the top of the tailstock. Push the top of the tailstock forward to make the workpiece push inward. Press the top 3, the front end of the claw can clamp the workpiece; when disassembling, push the top of the tailstock backward, the workpiece will no longer press the top 3, the front part of the claw will be released, and the workpiece can be pulled out. The disassembly process of the workpiece It only needs to be controlled by the top movement of the tailstock, and the lathe does not need to stop, which greatly improves the processing efficiency.

In this embodiment, the middle hole of the chuck body 1 is also provided with a slider 5 which is located at the rear side of the tip 3 and pushes the tip outward, and the middle hole of the chuck body 1 is also provided with a slider 5 which pushes the slider outward. Spring 6; the inner side of the front end of the claw has an arc-shaped groove 7 matching the workpiece, increasing the contact area and ensuring stable clamping of the workpiece.

In this embodiment, the rear end of the tip 3 has a hemispherical connecting portion 8, and the side of the chuck body is provided with a relief groove 9 communicating with the middle hole, and the rear end of the jaw 2 is formed by the corresponding relief groove 9. Extending into and sticking to the spherical surface of the connecting part, the spherical surface can ensure the synchronous movement of the claws and the consistent gripping force of the claws; the slider is connected with the connecting part through the pin shaft 10 .

In this embodiment, the front end of the chuck body 1 is provided with at least two pairs of hinged ears 11, the middle part of the jaw is hinged on the hinged ears and the center of gravity of the jaw is located at the front side of the hinged part of the jaw. During the rotation of the main shaft , when the rear end of the jaws does not receive the top pressure, the front end of the jaws can automatically open by relying on centrifugal force to facilitate the installation of the workpiece and avoid contact with the jaws when the workpiece is installed. In the specific implementation process, the jaws also Release can be achieved by spring action.

In this embodiment, the claw is hinged on the hinge ear through a bolt 12, and the bolt is locked by a nut after passing through the claw and the hinge ear.

The above preferred embodiments have further described the purpose, technical solutions and advantages of the utility model in detail. It should be understood that the above descriptions are only preferred embodiments of the utility model and are not intended to limit the utility model. For new models, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims (5)

1. A top clamp that uses the front and rear movement of the top of the tailstock to control the tension, it is characterized in that: it includes a chuck body installed on the main shaft of the lathe, at least two claws are hinged at the front end of the chuck body, and the center hole in the front end of the chuck body It is provided with a tip that slides with it and is used to bear against one end of the workpiece. The rear end of the jaw is bent inward and attached to the rear end of the tip to realize that when the workpiece presses the tip inward, the rear end of the jaw is stretched outward so that the front end is retracted. Hold on to the workpiece. 2. The tip clamp according to claim 1, which uses the tailstock tip to move back and forth to control the tightness, characterized in that: the middle hole of the chuck body is also provided with a slider that is located at the rear side of the tip and pushes the tip outward, A spring for pushing the slide block outward is also arranged in the middle hole of the chuck body; the inside of the front end of the claw has an arc-shaped groove matched with the workpiece. 3. The top clamp that utilizes the tailstock top to move back and forth to control the tension according to claim 2 is characterized in that: the rear end of the top has a hemispherical connection part, and the side of the chuck body is provided with a relief that communicates with the middle hole. slot, the rear end of the claw protrudes from the corresponding relief slot and sticks to the spherical surface of the connecting part; the slider is connected with the connecting part through a pin shaft. 4. The top clamp that uses the tailstock top to move back and forth to control the tension according to claim 1 is characterized in that: the front end of the chuck body is provided with at least two pairs of hinged ears, the middle part of the jaw is hinged on the hinged ears and The center of gravity of the jaw is on the front side of the jaw hinge. 5. The top clamp that utilizes the front and rear movement of the top of the tailstock to control the tension according to claim 4 is characterized in that: the claw is hinged on the hinge ear through a bolt, and the bolt is locked by a nut after passing through the claw and the hinge ear .