Rotary table clamping mechanism with compact structure

Abstract

The utility model discloses a compact-structure rotary table clamping mechanism, which comprises a cylinder body, a piston, a flange, a rotary disc and a fixed disc, a rotary table comprises a rotating shaft and a shell, the rotating shaft is concentrically arranged in the shell, the front end of the rotating shaft is concentrically provided with a shaft section extending to the outer side of the shell, and the piston is arranged in the shell. The rotating discs are concentrically arranged on the rear side of the shaft section at intervals in the axial direction, the fixed discs are concentrically arranged in the shell at intervals in the axial direction, the fixed discs and the rotating discs are distributed in a staggered mode, the cylinder body is arranged in the shell and located behind the fixed discs, the piston is arranged in the cylinder body and points to the fixed discs, and the piston is arranged in the cylinder body. And the flange is arranged at the tail part of the cylinder body to limit the backward movement of the piston. By means of the mode, the rotary table clamping mechanism compact in structure is compact in structure, friction force during clamping braking is increased, and the clamping braking effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of machine tool rotary table technology, and in particular to a compact rotary table clamping mechanism. Background Technology

[0002] To facilitate workpiece rotation during machining, some machine tools are equipped with rotary tables. The workpiece is subjected to significant forces during machining, placing higher demands on the stability of the rotary table and necessitating its braking system.

[0003] The turntable can be braked using either axle-mounted brakes or disc brakes. Disc brakes have a relatively compact structure. For example, utility model patent application number 2023212160307 discloses a disc locking device for a turntable. It locks the main shaft by the friction between the brake disc and the third piston, which can provide braking. However, the contact area between the brake disc and the third piston is limited, the friction is also limited, the braking force is low, and the installation space is limited, making it impossible to replace it with a larger disc brake mechanism. Improvements are needed. Utility Model Content

[0004] The main technical problem solved by this utility model is to provide a compact turntable clamping mechanism that improves the clamping and braking effect while ensuring the compactness of the structure.

[0005] To solve the above-mentioned technical problems, the present invention provides a compact turntable clamping mechanism, comprising: a cylinder, a piston, a flange, rotating discs, and fixed discs. The turntable includes a rotating shaft and a housing. The rotating shaft is concentrically arranged in the housing, and a shaft segment extending to the outside of the housing is concentrically arranged at the front end of the rotating shaft. The rotating discs are axially spaced and concentrically arranged behind the shaft segment. The fixed discs are axially spaced and concentrically arranged in the housing, and the fixed discs and rotating discs are staggered. The cylinder is arranged in the housing and located behind the fixed discs. The piston is arranged in the cylinder and points towards the fixed discs. The flange is arranged at the tail of the cylinder to limit the rearward movement of the piston. The outer wall of the piston has a stepped shaft structure. The cylinder is provided with a stepped hole corresponding to the piston, and a first oil chamber is formed at the step of the stepped hole and the outer wall of the piston. A second oil chamber is recessed at the tail of the piston.

[0006] In a preferred embodiment of the present invention, the outer diameter of the shaft segment is larger than the outer diameter of the rotating shaft to form a step at the joint, and a guide sleeve extending into the inner hole of the piston is provided in the flange.

[0007] In a preferred embodiment of this utility model, a first spacer ring is provided between two adjacent fixed discs, and a second spacer ring is provided between two adjacent rotating discs.

[0008] In a preferred embodiment of the present invention, the front end of the housing is provided with a first screw that passes through and fixes the disc and the first spacer ring and is connected to the cylinder body.

[0009] In a preferred embodiment of this utility model, a second screw is provided on the rotating disc to connect with the shaft segment through the second spacer ring, and a third screw is provided on the flange to connect with the cylinder body.

[0010] In a preferred embodiment of this utility model, a third spacer ring is provided at the tail end of the shaft segment.

[0011] In a preferred embodiment of this utility model, the inner diameter of the fixed disc is smaller than the outer diameter of the rotating disc.

[0012] In a preferred embodiment of this invention, the number of fixed discs is one more than the number of rotating discs, such that the rotating discs are located between two adjacent fixed discs.

[0013] In a preferred embodiment of the present invention, the cylinder body is provided with a first hydraulic flow channel communicating with the first oil chamber, the housing is provided with a second hydraulic flow channel communicating with the first hydraulic flow channel, the outer circle of the piston is provided with a third hydraulic flow channel communicating with the second oil chamber, the cylinder body is provided with a fourth hydraulic flow channel communicating with the third hydraulic flow channel, and the housing is provided with a fifth hydraulic flow channel communicating with the fourth hydraulic flow channel.

[0014] In a preferred embodiment of this utility model, a spring is provided between the piston tail and the flange.

[0015] The beneficial effects of this utility model are as follows: The compact turntable clamping mechanism disclosed in this utility model is specially designed with multiple staggered rotating discs and fixed discs, which increases the friction during clamping and braking, improves the clamping and braking effect, and uses the built-in piston as the clamping power source. It has a compact structure, high clamping accuracy, and is suitable for turntables with compact space and high torque braking force requirements. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0017] Figure 1 This is a schematic diagram of a preferred embodiment of a compact turntable clamping mechanism according to the present invention.

[0018] Figure 2 yes Figure 1 Sectional view along axis AA;

[0019] Figure 3 yes Figure 1 BB-direction sectional view. Detailed Implementation

[0020] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Please see Figures 1-3 The embodiments of this utility model include:

[0022] like Figures 1-3 The compact turntable clamping mechanism shown is used for clamping and braking the turntable. It includes a cylinder 3, a piston 5, a flange 4, a rotating disc 10, and a fixed disc 7. The turntable includes a rotating shaft 1 and a housing 2. The rotating shaft 1 is concentrically disposed within the housing 2. A shaft segment 14 extending concentrically to the outside of the housing 2 is disposed at the front end of the rotating shaft 1. In this embodiment, the outer diameter of the shaft segment 14 is larger than the outer diameter of the rotating shaft 1 to form a step at the joint. The shaft segment 14 and the rotating shaft 1 can be an integrated steel structure for synchronous rotation.

[0023] Rotating discs 10 are axially spaced and concentrically arranged on the rear side of shaft segment 14. A second spacer ring 12 is provided between two adjacent rotating discs 10 to prevent contact between adjacent rotating discs 10. A second screw 15 is provided on the rotating disc 10, passing through the second spacer ring 12 and connecting to the shaft segment 14, to fix the rotating disc 10 to the second spacer ring 12, so that the rotating disc 10 rotates with the shaft segment 14 and the rotating shaft 1.

[0024] The fixed discs 7 are axially spaced and concentrically arranged in the housing 2. In this embodiment, a first spacer ring 6 is provided between two adjacent fixed discs 7 to prevent contact between adjacent fixed discs 7. The cylinder body 3 is disposed in the housing 2 and located behind the fixed discs 7. A first screw 9 is provided at the front end of the housing 2, passing through the fixed discs 7 and the first spacer ring 6 and connecting to the cylinder body 3, to fix the fixed discs 7 and the cylinder body 3, resulting in a stable structure.

[0025] like Figure 1 As shown, the fixed disc 7 and the rotating disc 10 are staggered. During the rotation of the shaft 1, the fixed disc 7 and the rotating disc 10 do not contact each other and do not affect the rotation of the shaft segment 14. A third spacer 8 is provided at the tail end of the shaft segment 14. The axial position of the rotating disc 10 is adjusted by using third spacers 8 of different thicknesses to ensure assembly accuracy.

[0026] In this embodiment, the inner diameter of the fixed disc 7 is smaller than the outer diameter of the rotating disc 10, resulting in an axially overlapping portion between the fixed disc 7 and the rotating disc 10. In this overlapping portion, the fixed disc 7, after being deformed by axial force, can contact the rotating disc 10 for mutual clamping and friction braking. The number of fixed discs 7 is one more than the number of rotating discs 10, ensuring that the rotating disc 10 is positioned between two adjacent fixed discs 7, thus guaranteeing the clamping effect of the fixed discs 7 on the rotating discs 10. The number of rotating discs 10 is at least two, increasing the contact area between the rotating discs 10 and the fixed discs 7 while maintaining a compact structure, thus meeting the requirements for high-torque braking force.

[0027] In addition, a diamond coating can be added to the surfaces of the rotating disc 10 and the fixed disc 7 to increase the coefficient of friction and surface hardness, resulting in a longer service life.

[0028] The piston 5 is positioned in the cylinder 3 and points towards the fixed disc 7, as follows: Figure 2 As shown, after the piston 5 moves forward (to the left in the figure), it applies an axial force to the fixed disc 7. The point of force application is located at the part where the fixed disc 7 and the rotating disc 10 overlap axially.

[0029] Flange 4 is positioned at the rear of cylinder 3 to limit the rearward movement of piston 5. In this embodiment, flange 4 is equipped with a third screw 13 connected to cylinder 3, resulting in a robust structure. A guide sleeve 16 extending into the inner hole of piston 5 is provided in flange 4 to guide the axial movement of piston 5, and a sealing ring is installed to prevent hydraulic oil leakage.

[0030] like Figure 3 As shown, the outer wall of piston 5 has a stepped shaft structure. The cylinder body 3 is provided with a stepped hole corresponding to piston 5, and the stepped hole and the outer wall of piston 5 form a first oil chamber 21. The cylinder body 3 is provided with a first hydraulic flow channel 17 that communicates with the first oil chamber 21. The housing 2 is provided with a second hydraulic flow channel 18 that communicates with the first hydraulic flow channel 17. The second hydraulic flow channel 18 can be connected to an external hydraulic pipeline to inject hydraulic oil into the first oil chamber 21, drive piston 5 to move backward, and does not affect the rotation of the rotating shaft 1.

[0031] A second oil chamber 22 is recessed at the tail of piston 5. A third hydraulic flow channel 23 communicating with the second oil chamber 22 is provided on the outer circle of piston 5. A fourth hydraulic flow channel 20 communicating with the third hydraulic flow channel 23 is provided in cylinder 3. A fifth hydraulic flow channel 19 communicating with the fourth hydraulic flow channel 20 is provided in housing 2. The fifth hydraulic flow channel 19 can be connected to an external hydraulic pipeline. When braking is required, hydraulic oil is injected into the second oil chamber 22 to drive piston 5 to move forward. The fixed disc 7 is deformed by force and clamps with the rotating disc 10 for braking.

[0032] A spring 11 is installed between the tail of piston 5 and flange 4, such as Figure 2 As shown, spring 11 is located in the second oil chamber 22, facilitating assembly. In emergency situations or when the turntable loses its power source, spring 11 provides an elastic driving force to move piston 5 forward, providing a torque for the turntable to be safely held in place. During normal operation of the turntable, piston 5 can move backward to compress spring 11, preventing contact between rotating disc 10 and fixed disc 7, thus reducing maintenance costs.

[0033] In summary, the present invention discloses a compact turntable clamping mechanism that occupies little installation space and has a fast piston action, which can quickly provide braking force to the fixed disc, so that the rotating disc contacts and clamps the fixed disc to perform friction braking and ensure the braking effect.

[0034] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A compact turntable clamping mechanism for clamping and braking a turntable, characterized in that, include: The rotary table comprises a cylinder, piston, flange, rotating discs, and fixed discs. The rotary table includes a shaft and a housing. The shaft is concentrically disposed within the housing, with a shaft segment extending concentrically to the outside of the housing at its front end. The rotating discs are axially spaced and concentrically disposed behind the shaft segment. The fixed discs are axially spaced and concentrically disposed within the housing, with the fixed discs and rotating discs staggered. The cylinder is disposed within the housing and located behind the fixed discs. The piston is disposed within the cylinder and points towards the fixed discs. The flange is disposed at the rear of the cylinder to limit the piston's rearward movement. The piston's outer wall has a stepped shaft structure. The cylinder has a stepped hole corresponding to the piston, and a first oil chamber is formed at the step of the stepped hole and the piston's outer wall. A second oil chamber is recessed at the rear of the piston.

2. The compact turntable clamping mechanism according to claim 1, characterized in that, The outer diameter of the shaft segment is larger than the outer diameter of the rotating shaft to form a step at the joint, and a guide sleeve extending into the piston bore is provided in the flange.

3. The compact turntable clamping mechanism according to claim 1, characterized in that, A first spacer ring is provided between two adjacent fixed discs, and a second spacer ring is provided between two adjacent rotating discs.

4. The compact turntable clamping mechanism according to claim 3, characterized in that, The front end of the housing is provided with a first screw that passes through and fixes the disc and the first spacer ring and is connected to the cylinder body.

5. The compact turntable clamping mechanism according to claim 1, characterized in that, The rotating disc is provided with a second screw that passes through the second spacer ring and connects to the shaft segment, and the flange is provided with a third screw that connects to the cylinder body.

6. The compact turntable clamping mechanism according to claim 1, characterized in that, A third spacer ring is provided at the tail end of the shaft segment.

7. The compact turntable clamping mechanism according to claim 1, characterized in that, The inner diameter of the fixed disc is smaller than the outer diameter of the rotating disc.

8. The compact turntable clamping mechanism according to claim 1, characterized in that, The number of fixed discs is one more than the number of rotating discs, such that the rotating discs are located between two adjacent fixed discs.

9. The compact turntable clamping mechanism according to claim 1, characterized in that, The cylinder body is provided with a first hydraulic flow channel communicating with the first oil chamber, the housing is provided with a second hydraulic flow channel communicating with the first hydraulic flow channel, the outer circle of the piston is provided with a third hydraulic flow channel communicating with the second oil chamber, the cylinder body is provided with a fourth hydraulic flow channel communicating with the third hydraulic flow channel, and the housing is provided with a fifth hydraulic flow channel communicating with the fourth hydraulic flow channel.

10. The compact turntable clamping mechanism according to claim 1, characterized in that, A spring is provided between the piston tail and the flange.

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