Index chuck

Abstract

The indexing chuck comprises a cylinder body, an indexing shaft and a clamping seat are arranged on the cylinder body, the clamping seat and the indexing shaft are vertically opposite in position, and the indexing chuck is characterized in that a connecting lever is arranged in the cylinder body, the connecting lever is provided with a rotating fulcrum, the two ends of the rotating fulcrum are a force application end and a driving end respectively, and the driving end is connected with a driver; the driver is movably arranged in the cylinder body, the moving direction of the driver is consistent with the moving direction of the clamping base, and the force application end is connected with the clamping base. The clamping device has the advantages that the structure is simple, the connecting lever is arranged in the cylinder body, the clamping base and the drive are connected through the connecting lever, force is applied to the drive to drive the driving end of the connecting lever to move, and under the action of the rotating fulcrum, the force applying end of the connecting lever applies force towards the clamping direction to the clamping base; according to the indexing chuck, clamping force is provided, centrifugal force in the clamping process is compensated, under the condition that the size specification of the indexing chuck is limited, enough clamping force can be provided, and safe use is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool fixtures, in particular to a dividing chuck. Background Art

[0002] The indexing chuck is a special chuck used on CNC lathes. The program controls the fixture to drive the workpiece to rotate, so that multiple surfaces of the workpiece can be processed in one clamping. For the same model of machine tools, the smaller the chuck used, the higher the available speed and the higher the processing efficiency. Therefore, for small machine tools used to process small parts, ultra-small indexing chucks can effectively improve the processing efficiency. The conventional ultra-small indexing chuck usually includes a cylinder body, on which an indexing shaft and a clamping seat are arranged. The indexing shaft and the clamping seat are directly opposite to each other in the upper and lower positions. The indexing shaft is provided with a workpiece positioning cavity. One end of the workpiece is positioned and installed on the indexing shaft, and the workpiece is clamped by the clamping seat ejecting and abutting against the other end of the workpiece. Due to the small size of the ultra-small indexing chuck, the diameter of the clamping seat is also small, which makes the clamping force smaller. Insufficient clamping force can easily lead to the indexing chuck not clamping the workpiece tightly, causing the tool to vibrate during processing, and even dangerous situations such as the workpiece flying out, which poses a safety hazard. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a dividing chuck with a simple structure and sufficient clamping force to achieve safe use while maintaining ultra-small specifications.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: A dividing chuck, the dividing chuck comprises a cylinder body, a dividing shaft and a clamping seat are arranged on the cylinder body, the clamping seat and the dividing shaft are vertically opposite to each other, a connecting lever is arranged in the cylinder body, the connecting lever has a rotating fulcrum, the two ends of the rotating fulcrum are respectively a force-applying end and a driving end, the driving end is connected to a drive, the drive is movably arranged in the cylinder body, and the moving direction of the drive is consistent with the moving direction of the clamping seat, and the force-applying end is connected to the clamping seat.

[0005] The driving end has a first ball head connection joint, and a first connection chamber is arranged inside the driving end. The first ball head connection joint is rotatably installed in the first connection chamber.

[0006] The force-applying end has a second ball head connection joint, a second connection chamber is arranged in the clamping seat, and the second ball head connection joint is rotatably installed in the second connection chamber.

[0007] The rotating fulcrum has a spherical connection part, and a through installation chamber is arranged at the installation position corresponding to the spherical connection part in the cylinder body. The spherical connection part is rotatably arranged in the installation chamber, and the force-applying end and the driving end are extended and arranged outside the installation chamber.

[0008] The drive is a piston, and a drive chamber is arranged in the cylinder body. The piston is movably arranged in the drive chamber and divides the drive chamber into an independent release chamber and a force chamber. The release chamber and the force chamber are respectively provided with an oil inlet and an oil outlet, and the drive end is connected to the piston.

[0009] A lubrication passage extending from the force-applying end to the driving end is arranged in the connecting lever.

[0010] The piston is a detachable split structure.

[0011] Compared with the prior art, the advantages of the present invention are: simple structure, a connecting lever is arranged in the cylinder body, the clamping seat and the drive are connected by the connecting lever, and the driving end of the connecting lever is driven to move by applying force on the drive. Under the action of the rotating fulcrum, the force-applying end of the connecting lever applies a force in the clamping direction to the clamping seat, thereby providing clamping force and compensating for centrifugal force during the clamping process. When the size specifications of the dividing chuck are limited, sufficient clamping force can be provided and safe use can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic cross-sectional structural diagram of the present invention in a released state; Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure with the connecting lever and piston removed. DETAILED DESCRIPTION

[0013] The present invention is further described in detail below with reference to the accompanying drawings.

[0014] As shown in the figure, a dividing chuck includes a cylinder body 1, on which a dividing shaft 2 and a clamping seat 3 are arranged, the clamping seat 3 and the dividing shaft 2 are directly opposite to each other in upper and lower positions, and a workpiece positioning seat (not shown in the figure) is detachably arranged on the dividing shaft 2, one end of the workpiece is positioned and mounted on the workpiece positioning seat, and the workpiece is clamped by the clamping seat 3 being pushed downward and abutted against the other end of the workpiece, a connecting lever 4 is arranged in the cylinder body 1, the connecting lever 4 has a rotating fulcrum 401, and the two ends of the rotating fulcrum 401 are respectively a force-applying end 402 and a driving end 403, the driving end 403 is connected to a driving 5, the driving 5 is movably arranged in the cylinder body 1, and the moving direction of the driving 5 is consistent with the moving direction of the clamping seat 3, and the force-applying end 402 is connected to the clamping seat 3.

[0015] In this specific embodiment, in order to ensure that the overall movement of the connecting lever 4 is smooth and stable, a first ball head connecting joint 43 is arranged at the driving end 403, and a first connecting chamber 51 is arranged in the driving 5, so that the first ball head connecting joint 43 can be rotatably installed in the first connecting chamber 51; a second ball head connecting joint 42 is arranged at the force applying end 402, and a second connecting chamber 31 is arranged in the clamping seat 3, so that the second ball head connecting joint 42 can be rotatably installed in the second connecting chamber 31; a spherical connecting part 41 is arranged at the rotating fulcrum 401, and a through installation chamber 11 is arranged at the installation position corresponding to the spherical connecting part 41 in the cylinder body 1, so that the spherical connecting part 41 can be rotatably arranged in the installation chamber 11, and the force applying end 402 and the driving end 403 extend out of the installation chamber 11 to connect with the clamping seat 3 and the driving 5 respectively.

[0016] In this specific embodiment, a large-diameter piston is selected for the drive 5, and a drive chamber 10 is set in the cylinder body 1. The piston is movably set in the drive chamber 10 and divides the drive chamber 10 into an independent release chamber 101 and a force chamber 102. The release chamber 101 and the force chamber 102 are respectively provided with an oil inlet and an oil outlet (not shown in the figure), and the drive end 403 is connected to the piston. The structure is simple. By injecting oil into the oil inlet of the force-applying chamber 102, the piston can be driven to move in the opposite direction of the clamping direction, and the driving end 403 of the connecting lever 4 can be moved in the opposite direction of the clamping direction, and then the force-applying end 402 of the connecting lever 4 can be moved in the clamping direction, which is used to compensate for the clamping force of the clamping seat 3, ensuring that the clamping seat 3 can provide sufficient clamping force and centrifugal force to the workpiece. When face-changing processing is required, by injecting oil into the oil inlet of the release chamber 101, the piston can be driven to move in the clamping direction, and the driving end 403 of the connecting lever 4 can be moved in the clamping direction, and then the force-applying end 402 of the connecting lever 4 can be moved in the opposite direction of the clamping direction, so as to achieve loosening and release.

[0017] In this specific embodiment, a lubrication channel 40 is provided in the connecting lever 4, which runs from the force-applying end 402 to the driving end 403. Oil can be injected into the lubrication channel 40 to lubricate the entire movable mechanism, thereby achieving stable and smooth overall movement.

[0018] In this specific embodiment, in order to facilitate the connection and installation between the connecting lever 4 and the piston, the piston is designed as a detachable split structure.

[0019] Compared with other indexing chucks that directly supply oil and press down on the clamping seat, the indexing chuck of this structure can provide clamping force and centrifugal force compensation for the clamping seat by adding a large-diameter piston in the cylinder body and connecting the clamping seat with a lever mechanism. When the piston moves upward due to the pressure of the oil cylinder, the driving end 403 of the connecting lever 4 is pushed upward, and the spherical surface of the first ball head connecting joint 43 slides with the inner wall of the piston, driving the connecting lever 4 itself to rotate around the spherical connecting part 41. At this time, the force-applying end 402 of the connecting lever 4 rotates downward, and the clamping seat 3 moves downward under pressure, cooperating with the workpiece positioning seat on the indexing axis to provide a stable clamping force. When the surface needs to be changed, the connecting lever 4 rotates in the opposite direction to release the workpiece. Due to the influence of centrifugal force, when the indexing chuck rotates, the piston will move radially. Usually, a piston with a larger mass is selected so that the piston at the rear end is heavier than the weight of the clamping seat. Then the centrifugal force will cause the piston to move outward (in the opposite direction of the clamping direction). Under the action of the connecting lever 4, the clamping seat 3 will move inward (in the clamping direction) to compensate. In other words, the higher the speed, the higher the centrifugal force and the greater the clamping force.

Claims

1. A graduated chuck, comprising a cylinder body, on which a graduated shaft and a clamping seat are arranged, wherein the clamping seat and the graduated shaft are vertically aligned, characterized in that A connecting lever is arranged in the cylinder body, and the connecting lever has a rotating fulcrum. The two ends of the rotating fulcrum are respectively a force-applying end and a driving end. The driving end is connected to a drive, and the drive is movably arranged in the cylinder body, and the moving direction of the drive is consistent with the moving direction of the clamping seat, and the force-applying end is connected to the clamping seat.

2. A graduated chuck as claimed in claim 1, characterized in that The driving end has a first ball head connection joint, and a first connection chamber is arranged inside the driving end. The first ball head connection joint is rotatably installed in the first connection chamber.

3. A graduated chuck as claimed in claim 1, characterized in that The force-applying end has a second ball head connection joint, a second connection chamber is arranged in the clamping seat, and the second ball head connection joint is rotatably installed in the second connection chamber.

4. A graduated chuck as claimed in claim 1, characterized in that The rotating fulcrum has a spherical connection part, and a through installation chamber is arranged at the installation position corresponding to the spherical connection part in the cylinder body. The spherical connection part is rotatably arranged in the installation chamber, and the force-applying end and the driving end are extended and arranged outside the installation chamber.

5. An indexing chuck as claimed in claim 1, characterized in that The drive is a piston, and a drive chamber is arranged in the cylinder body. The piston is movably arranged in the drive chamber and divides the drive chamber into an independent release chamber and a force chamber. The release chamber and the force chamber are respectively provided with an oil inlet and an oil outlet, and the drive end is connected to the piston.

6. An indexing chuck as claimed in claim 1, characterized in that A lubrication passage extending from the force-applying end to the driving end is arranged in the connecting lever.

7. An indexing chuck as claimed in claim 5, characterized in that The piston is a detachable split structure.

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