High-braking-torque direct-drive rotary table brake structure

Abstract

The utility model discloses a high braking torque direct drive rotary table brake structure, which relates to the technical field of grinding machines and lathes, and comprises a machine tool body, a working table is arranged at the top of the machine tool body, a main shaft is arranged in the machine tool body, a connecting disc is arranged between the main shaft and the working table, and a rotor is sleeved outside the main shaft. A stator coil is arranged between the rotor and the machine tool body, a brake pad and a brake piston which are sequentially arranged from top to bottom in the axis direction of the main shaft are arranged between the main shaft and the stator, a piston cover is arranged below the piston, and a grating is arranged below the main shaft. According to the high-braking-torque direct-drive rotary table braking structure, the arch-shaped brake pad is arranged, the braking time is shortened, the braking loosening speed is increased, and then the braking and stopping accuracy is improved. The arch-shaped brake pad further has large braking force and can adapt to a higher rotating speed.

Description

A high braking torque direct drive turntable brake structure Technical Field

[0001] This utility model relates to the field of grinding machine and lathe technology, and in particular to a high braking torque direct drive rotary table brake structure. Background Technology

[0002] In vertical grinders and lathes, direct-drive rotary tables are used to precisely control the position and angle of the workpiece. To ensure machining accuracy, a braking mechanism is required to quickly and accurately stop the rotary table and hold it in a specific position, avoiding machining errors caused by the inertial rotation of the rotary table or external interference.

[0003] Existing direct-drive turntable braking structures have long braking times and relatively low braking force.

[0004] Therefore, a high braking torque direct-drive turntable braking structure is proposed to solve the above problems. Summary of the Invention

[0005] In view of the problems of long braking time and low braking force of the existing direct drive turntable braking structure, this utility model is proposed.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a high braking torque direct drive rotary table brake structure, which includes a machine tool body, a worktable provided on the top of the machine tool body, a spindle provided inside the machine tool body, a connecting plate provided between the spindle and the worktable, a rotor provided on the outer sleeve of the spindle, a stator coil provided between the rotor and the machine tool body, a brake pad and a brake piston arranged sequentially from top to bottom along the axis of the spindle between the spindle and the stator coil, a piston cover provided below the brake piston, and a grating provided below the spindle.

[0007] Preferably, the brake pads are arranged in contact with the main shaft and the brake piston.

[0008] Preferably, the brake pad is an arc-shaped brake pad with the opening facing the main shaft.

[0009] Preferably, the brake pad is an elastic metal sheet.

[0010] Preferably, a bearing and a sealing ring are provided between the machine tool body and the worktable.

[0011] Preferably, the bearing is a YRT turntable bearing.

[0012] The beneficial effects of this utility model are:

[0013] 1. By using bow-shaped brake pads, braking time is shortened, and the release speed of the brakes is increased, thereby improving braking accuracy. Bow-shaped brake pads also have greater braking force and can adapt to higher speeds.

[0014] 2. By installing bearings, the load-bearing capacity of the worktable is increased, reducing spindle deflection and vibration. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of 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. Among them:

[0016] Figure 1 is a schematic cross-sectional view of the structure of this utility model.

[0017] Explanation of reference numerals in the attached figures:

[0018] 1. Worktable; 2. Spindle; 3. Connecting plate; 4. Machine tool body; 5. Bearing; 6. Sealing ring; 7. Piston cover; 8. Grating; 9. Brake piston; 10. Brake pad; 11. Rotor; 12. Stator coil. Detailed Implementation

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0020] Referring to Figure 1, an embodiment of this utility model provides a high-torque direct-drive rotary table braking structure. This high-torque direct-drive rotary table braking structure includes a machine tool body 4, a worktable 1 at the top of the machine tool body 4, a spindle 2 inside the machine tool body 4, a connecting plate 3 between the spindle 2 and the worktable 1, a rotor 11 surrounding the spindle 2, a stator coil 12 between the rotor 11 and the machine tool body 4, a brake pad 10 and a brake piston 9 arranged sequentially from top to bottom along the axis of the spindle 2 between the spindle 2 and the stator coil 12, a piston cover 7 below the brake piston 9, and a grating 8 below the spindle 2. The working surface is in the upward direction, and the piston cover 7 is in the downward direction.

[0021] Specifically, a worktable 1 is provided on the upper part of the machine tool body 4. A cavity is provided in the lower part of the worktable 1. A spindle 2 is provided in the cavity. A rotor 11 is sleeved on the outside of the spindle 2. A stator coil 12 is sleeved on the outside of the rotor 11. The stator and rotor 11 together form a power source to drive the spindle 2 to rotate. The worktable 1 connected to the spindle 2 rotates together with the spindle 2.

[0022] Specifically, a brake chamber is provided between the main shaft 2 and the stator. A brake pad 10 and a brake piston 9 are housed within the brake chamber. A piston cover 7 is located below the brake chamber and is fixed to the lower end of the main shaft 2 to seal the brake piston 9 and brake pad 10 within the brake chamber. The brake pad 10 is positioned above the brake piston 9, and both the brake pad 10 and the piston are in contact with the main shaft 2 but not connected.

[0023] Specifically, brake pad 10 is an arc-shaped brake pad with the arc opening facing the main shaft 2. Brake pad 10 is an elastic metal sheet. When selecting materials, it is ensured that brake pad 10 can produce slight deformation and has high strength. Furthermore, wear-resistant materials can also be selected.

[0024] Specifically, the machine tool body 4 is equipped with hydraulic oil pipes. Hydraulic oil in these pipes can enter the brake chamber. Hydraulic oil flows into the bottom of the brake piston 9 within the brake chamber, pushing it upwards and compressing the brake pads 10. This causes a slight deformation of the brake pads 10, gripping the spindle 2 and completing the braking process. It should be noted that the flow of hydraulic oil into and out of the brake chamber is existing technology; reference can be made to existing technologies such as directional valves.

[0025] Specifically, a bearing 5 and a sealing ring 6 are installed at the connection between the worktable 1 and the machine tool body 4. The bearing 5 is a YRT slewing bearing. YRT series bearings all consist of three rows of rollers: two rows of axial rollers ensure stable axial load capacity, and one row of radial rollers ensures that the bearing 5 can withstand radial force and overturning moment, making it suitable for axially loaded rotary mechanisms. The bearing 5 increases the load capacity of the spindle 2, allowing for the processing of heavier workpieces. The bearing 5 also reduces the deflection and vibration of the worktable 1. The sealing ring effectively prevents material residue and waste from the worktable 1 from falling onto the spindle 2.

[0026] During use, braking: Hydraulic oil in the hydraulic oil pipe is introduced into the brake chamber. The hydraulic oil pushes the brake piston 9 upward and squeezes the brake pad 10, causing the brake pad 10 to undergo slight deformation, which grips the main shaft 2 and completes the braking. Because the brake pad 10 has the characteristic of slight deformation, the braking response speed is fast and the braking time is short.

[0027] Release the brake: Stop the flow of hydraulic oil and allow the hydraulic oil to flow out of the brake chamber. The brake piston 9 moves downward and releases the brake pad 10. The brake pad 10 returns to its original shape, thus completing the release of the brake.

[0028] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A high braking torque direct-drive rotary table braking structure, comprising a machine tool body (4), a worktable (1) provided on the top of the machine tool body (4), a spindle (2) provided inside the machine tool body (4), and a connecting plate (3) provided between the spindle (2) and the worktable (1), characterized in that: The spindle (2) is fitted with a rotor (11), and a stator coil (12) is provided between the rotor (11) and the machine tool body (4). A brake pad (10) and a brake piston (9) are arranged sequentially from top to bottom along the axis of the spindle (2) between the spindle (2) and the stator coil (12). A piston cover (7) is provided below the brake piston (9), and a grating (8) is provided below the spindle (2).

2. The high braking torque direct-drive turntable brake structure according to claim 1, characterized in that: The brake pad (10) is disposed in contact with the main shaft (2) and the brake piston (9).

3. The high braking torque direct-drive turntable brake structure according to claim 2, characterized in that: The brake pad (10) is an arc-shaped brake pad with its opening facing the main shaft (2).

4. The high braking torque direct-drive turntable brake structure according to claim 1, characterized in that: The brake pad (10) is an elastic metal sheet.

5. The high braking torque direct-drive turntable brake structure according to claim 1, characterized in that: A bearing (5) and a sealing ring (6) are provided between the machine tool body (4) and the worktable (1).

6. The high braking torque direct-drive turntable brake structure according to claim 5, characterized in that: The bearing (5) is a YRT turntable bearing.

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