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, and the indexing chuck is characterized in that a push rod is arranged in the cylinder body, the push rod can be arranged in the cylinder body in a front-back movable mode, the front end head of the push rod is connected with the clamping seat in a matched mode, and the bottom end face of the front end head of the push rod is an inclined driving end face. The clamping base is provided with an inclined matching end face matched with the inclined driving end face, and the inclined driving end face is attached to the inclined matching end face. The indexing chuck has the advantages that the structure is simple, the push rod is arranged in the cylinder body, the inclined wedge matching structure is formed through the inclined driving end face arranged at the front end of the push rod and the inclined matching end face arranged on the clamping base, the push rod is pushed forwards, downward pressing component force can be provided for the clamping base, and the clamping base can be clamped under the condition that the size specification of the indexing chuck is limited. And enough and stable 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 comprises a cylinder body, on which a dividing shaft and a clamping seat are provided, the clamping seat and the dividing shaft are directly opposite each other in upper and lower positions, a push rod is provided in the cylinder body, and the push rod can be movably arranged in the cylinder body forward and backward, the front end head of the push rod is matched with the clamping seat, the bottom end face of the front end head of the push rod is an inclined driving end face, and the clamping seat is provided with an inclined matching end face that matches the inclined driving end face, and the inclined driving end face is fitted with the inclined matching end face; when the push rod moves forward, a downward pressure is provided to the clamping seat through the matching of the inclined driving end face and the inclined matching end face.

[0006] The oblique driving end face and the oblique matching end face are both oblique end faces that are inclined downward from front to back.

[0007] The cylinder body is provided with a driving chamber for the push rod to move forward and backward. The rear end of the push rod is connected to a piston. The piston divides the driving chamber into an independent front chamber and a rear chamber. The front chamber and the rear chamber are respectively provided with oil ports for oil inlet and oil outlet.

[0008] The cylinder body is provided with an installation chamber for installing the clamping seat and a guide chamber for guiding the forward and backward movement of the push rod. The installation chamber is connected to the driving chamber through the guide chamber, and the front end of the push rod passes through the guide chamber and is connected to the clamping seat.

[0009] The rear end of the driving cavity is open, and a sealing end cover is detachably provided in the rear end opening of the driving cavity.

[0010] A guide installation cavity matched with the front end of the push rod is provided in the clamping seat, and the inner end surface of the bottom of the guide installation cavity is the oblique matching end surface.

[0011] A push rod is provided in the cylinder body, and the indexing shaft is pushed by the push rod to realize indexing rotation.

[0012] Compared with the prior art, the advantages of the present invention are: simple structure, a push rod is arranged in the cylinder body, and an oblique wedge matching structure is formed by the oblique driving end face arranged at the front end of the push rod and the oblique matching end face arranged on the clamping seat. The push rod is pushed forward to provide a downward pressure component to the clamping seat, which reasonably utilizes the space of the cylinder body. When the size specifications of the indexing chuck are limited, it can provide sufficient and stable clamping force and achieve safe use. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0014] Figure 2 This is a schematic cross-sectional view of the connection between the clamping seat and the push rod in the utility model;

[0015] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure with the clamping seat, push rod and sealing end cover removed. DETAILED DESCRIPTION

[0016] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0017] 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, and the clamping seat 3 and the dividing shaft 2 are directly opposite to each other in the upper and lower positions. A push rod 4 is provided in the cylinder body 1, and the push rod 4 can be movably arranged in the cylinder body 1 forward and backward. The front end head of the push rod 4 is matched with the clamping seat 3, and the bottom end face of the front end head of the push rod 4 is an inclined driving end face 41. The clamping seat 3 is provided with an inclined matching end face 31 that matches the inclined driving end face 41, and the inclined driving end face 41 is fitted with the inclined matching end face 31; when the push rod 4 moves forward, a downward pressure is provided to the clamping seat 3 through the matching of the inclined driving end face 41 and the inclined matching end face 31.

[0018] In this specific embodiment, the oblique driving end surface 41 and the oblique matching end surface 31 are both oblique end surfaces that are inclined downward from front to back.

[0019] In this embodiment, a drive chamber 11 is provided within the cylinder body 1, allowing the forward and backward movement of the push rod 4. A piston 40 is connected to the rear end of the push rod 4. The piston 40 divides the drive chamber 11 into independent front and rear chambers 111 and 112. Each chamber is equipped with corresponding oil inlet and outlet ports (not shown). The structure is simple. Oil is injected into the corresponding oil ports in the rear chamber 112, driving the piston 40 and the push rod 4 forward. During this forward movement of the push rod 4, the angled driving end face 41 at the front end of the push rod 4 engages the angled mating end face 31 on the clamping seat 3, applying a vertical downward force to the clamping seat 3. This forces the clamping seat 3 to engage with the fixture on the indexing shaft 2 to clamp the workpiece. To change sides, the clamping seat 3 moves upward, retracting the push rod 4 to release the workpiece. The indexing shaft 2 rotates to change sides, and the above steps are repeated. The reciprocating motion of the push rod 4 achieves clamping and release of the indexing chuck.

[0020] In this embodiment, the cylinder body 1 is provided with a mounting chamber 14 for mounting the clamping seat 3 and a guide chamber 15 for guiding the forward and backward movement of the push rod 4. The mounting chamber 14 is connected to the drive chamber 11 via the guide chamber 15. The front end of the push rod 4 passes through the guide chamber 15 and engages with the clamping seat 3. The guide chamber 15 not only guides the forward and backward movement of the push rod 4, but also ensures that the front end of the push rod 4 can engage with the clamping seat 3.

[0021] In this specific embodiment, in order to facilitate the installation of the push rod 4, a rear end opening of the drive chamber 11 is designed during processing. After the push rod 4 is installed, a sealing end cover 12 is detachably installed in the rear end opening of the drive chamber 11 to close the drive chamber 11.

[0022] In this embodiment, the clamping seat 3 is provided with a guide mounting cavity 30 that mates with the front end of the push rod 4. The bottom inner end surface of the guide mounting cavity 30 is an oblique mating end surface 31. This ensures a stable connection and mounting of the push rod 4 to the clamping seat 3, while also providing guidance for the movement of the push rod 4 through the guide mounting cavity 30.

[0023] In this specific embodiment, a push rod 13 is provided in the cylinder body 1 , and the indexing shaft 2 is pushed by the push rod 13 to realize indexing rotation.

[0024] In this specific embodiment, a workpiece positioning seat (not shown in the figure) is detachably provided on the dividing shaft 2, and one end of the workpiece is positioned and installed on the workpiece positioning seat, and the workpiece is clamped and fixed by the clamping seat 33 that is pushed downward and pressed against the other end of the workpiece.

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 push rod is provided in the cylinder body, and the push rod can be movably arranged in the cylinder body forward and backward. The front end head of the push rod is matched with the clamping seat. The bottom end face of the front end head of the push rod is an inclined driving end face. The clamping seat is provided with an inclined matching end face that matches the inclined driving end face. The inclined driving end face is fitted with the inclined matching end face. When the push rod moves forward, a downward pressure is provided to the clamping seat through the matching of the inclined driving end face and the inclined matching end face.

2. An indexing chuck according to claim 1, characterized in that The oblique driving end face and the oblique matching end face are both oblique end faces that are inclined downward from front to back.

3. An indexing chuck according to claim 1, characterized in that The cylinder body is provided with a driving chamber for the push rod to move forward and backward. The rear end of the push rod is connected to a piston. The piston divides the driving chamber into an independent front chamber and a rear chamber. The front chamber and the rear chamber are respectively provided with oil ports for oil inlet and oil outlet.

4. An indexing chuck according to claim 3, characterized in that The cylinder body is provided with an installation chamber for installing the clamping seat and a guide chamber for guiding the forward and backward movement of the push rod. The installation chamber is connected to the driving chamber through the guide chamber, and the front end of the push rod passes through the guide chamber and is connected to the clamping seat.

5. An indexing chuck according to claim 3, characterized in that The rear end of the driving cavity is open, and a sealing end cover is detachably provided in the rear end opening of the driving cavity.

6. An indexing chuck according to claim 1, characterized in that The clamping seat is provided with a guide installation cavity matched with the front end of the push rod, and the bottom inner end surface of the guide installation cavity is the oblique matching end surface.

7. An indexing chuck according to claim 1, characterized in that A push rod is provided in the cylinder body, and the indexing shaft is pushed by the push rod to realize indexing rotation.

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