Index chuck

Abstract

The utility model discloses an indexing chuck which 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, 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, two ends of the rotating fulcrum are respectively a force application end and a driving end, 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 utility model relates to the technical field of machine tool fixtures, in particular to a dividing chuck. Background Art

[0002] An indexing chuck is a special chuck used on CNC lathes. It uses a program-controlled fixture to rotate the workpiece, allowing multiple surfaces to be machined in a single clamping position. For the same machine model, the smaller the chuck, the higher the available rotational speed and the higher the machining efficiency. Therefore, for small machine tools used to machine small parts, ultra-small indexing chucks can effectively improve machining efficiency. Conventional ultra-small indexing chucks typically consist of a cylinder body with an indexing shaft and a clamping seat positioned vertically opposite each other. The indexing shaft is equipped with a workpiece positioning cavity. One end of the workpiece is positioned on the indexing shaft, and the clamping seat pushes against the other end to clamp the workpiece. Due to the small size of ultra-small indexing chucks, the diameter of the clamping seat is also small, resulting in insufficient clamping force. This insufficient clamping force can easily lead to the indexing chuck not holding the workpiece tightly, causing tool chattering during machining, or even dangerous situations such as the workpiece flying out, posing a safety hazard. Summary of the Invention

[0003] The technical problem to be solved by the utility model 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:

[0005] A dividing chuck, the dividing chuck comprises a cylinder body, a dividing shaft and a clamping seat are provided on the cylinder body, the clamping seat and the dividing shaft are directly opposite to each other in the upper and lower positions, a connecting lever is provided 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 provided 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.

[0006] The driving end has a first ball head connection joint, and a first connection chamber is provided in the driving end. The first ball head connection joint is rotatably installed in the first connection chamber.

[0007] The force-applying end has a second ball head connecting joint, a second connecting chamber is provided in the clamping seat, and the second ball head connecting joint is rotatably installed in the second connecting chamber.

[0008] The rotating fulcrum has a spherical connecting part, and a through installation chamber is provided in the cylinder body at the installation position corresponding to the spherical connecting part. The spherical connecting 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.

[0009] The drive is a piston, and a drive chamber is provided in the cylinder body. The piston is movably provided in the drive chamber and divides the drive chamber into an independent release chamber and a force-applying chamber. The release chamber and the force-applying chamber are respectively provided with an oil inlet and an oil outlet, and the drive end is connected to the piston.

[0010] A lubrication channel is provided in the connecting lever and passes through from the force-applying end to the driving end.

[0011] The piston is a detachable split structure.

[0012] 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 toward the clamping direction to the clamping seat, thereby providing clamping force and compensating for centrifugal force during the clamping process. When the size of the indexing chuck is limited, sufficient clamping force can be provided and safe use can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic cross-sectional view of the utility model in a released state;

[0014] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure with the connecting lever and piston removed. DETAILED DESCRIPTION

[0015] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0016] 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 provided, the clamping seat 3 and the dividing shaft 2 are aligned with each other in the upper and lower positions, and a workpiece positioning seat (not shown in the figure) is detachably provided 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 pushing the clamping seat 3 downward against the other end of the workpiece. A connecting lever 4 is provided in the cylinder body 1, and 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, and the driving end 403 is connected to a drive 5, which is movably provided in the cylinder body 1, and the moving direction of the drive 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.

[0017] 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 provided at the driving end 403, and a first connecting chamber 51 is provided 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 provided at the force-applying end 402, and a second connecting chamber 31 is provided 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 provided at the rotating fulcrum 401, and a through mounting chamber 11 is provided at the mounting position corresponding to the spherical connecting part 41 in the cylinder body 1, so that the spherical connecting part 41 can be rotatably provided in the mounting chamber 11, and the force-applying end 402 and the driving end 403 extend out of the mounting chamber 11 to connect with the clamping seat 3 and the driving 5 respectively.

[0018] In this specific embodiment, a large-diameter piston is selected as the driving 5, and a driving chamber 10 is set in the cylinder body 1. The piston is movably set in the driving chamber 10 and divides the driving chamber 10 into an independent release chamber 101 and a force-applying chamber 102. The release chamber 101 and the force-applying chamber 102 are respectively provided with an oil inlet and an oil outlet (not shown in the figure), and the driving 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, thereby realizing loosening and release.

[0019] In this 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.

[0020] 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.

[0021] Compared to other indexing chucks that directly apply oil to the clamping seat, this indexing chuck adds a large-diameter piston within the cylinder body, which, in conjunction with a lever mechanism, connects to the clamping seat. This provides clamping force and centrifugal force compensation for the clamping seat. When the piston moves upward under the pressure of the oil cylinder, the driving end 403 of the connecting lever 4 is pushed upward, causing the spherical surface of the first ball joint 43 to slide against the inner wall of the piston, driving the connecting lever 4 to rotate around the spherical connection portion 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 stable clamping force. When the surface needs to be changed, the connecting lever 4 is rotated 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 (opposite to the clamping direction). Under the action of the connecting lever 4, the clamping seat 3 will move inward (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, a graduated shaft and a clamping seat provided on the cylinder body, wherein the clamping seat and the graduated shaft are vertically aligned, characterized in that A connecting lever is provided 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 provided in the cylinder body, and the moving direction of the drive is consistent with the moving direction of the clamping seat. The force-applying end is connected to the clamping seat.

2. An indexing chuck according to claim 1, characterized in that The driving end has a first ball head connection joint, and a first connection chamber is provided in the driving end. The first ball head connection joint is rotatably installed in the first connection chamber.

3. An indexing chuck according to claim 1, characterized in that The force-applying end has a second ball head connecting joint, a second connecting chamber is provided in the clamping seat, and the second ball head connecting joint is rotatably installed in the second connecting chamber.

4. An indexing chuck according to claim 1, characterized in that The rotating fulcrum has a spherical connecting part, and a through installation chamber is provided in the cylinder body at the installation position corresponding to the spherical connecting part. The spherical connecting 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 according to claim 1, characterized in that The drive is a piston, and a drive chamber is provided in the cylinder body. The piston is movably provided in the drive chamber and divides the drive chamber into an independent release chamber and a force-applying chamber. The release chamber and the force-applying 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 according to claim 1, characterized in that A lubrication channel is provided in the connecting lever and passes through from the force-applying end to the driving end.

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

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