Precise hydraulic brake module for medium-sized rotary table

Abstract

The utility model relates to a precise hydraulic brake module of a medium-sized rotary table, which comprises a rotor shaft and a brake shell, the rotor shaft is rotatably arranged in the brake shell, a connecting ring plate is arranged on the inner side wall of the brake shell, and an annular brake elastic piece capable of being matched with the rotor shaft is arranged on the connecting ring plate. An upper oil cavity and a lower oil cavity are formed by the annular brake elastic piece and the inner side wall of the brake shell. A plurality of grooves are circumferentially distributed in the inner side wall of the annular brake elastic piece, and an arc-shaped groove is formed in the middle of the annular brake elastic piece. Braking is achieved through cooperation between the shaft-sticking type annular brake elastic piece and the rotor shaft, pressure is applied to the annular brake elastic piece through hydraulic oil, the braking process is rapid and stable, axial movement of the rotor shaft and the brake shell is avoided, and precise positioning braking at any position can be achieved; the locking device is simple in structure, easy to machine, large in locking force, stable and reliable.

Description

Technical Field

[0001] The utility model belongs to the technical field of processing machine tools, and particularly relates to a precision hydraulic brake module for a medium-sized rotary table. Background Art

[0002] The rotary table is equipped with a rotatable tabletop for supporting workpieces and achieving rotation and indexing positioning. It is one of the core components of a machine tool, and its motion accuracy is related to the machining and forming results of workpieces. Its braking process has a great impact on its motion accuracy. Most of the existing medium-sized rotary tables mainly use butterfly brakes, which have insufficient clamping force. After the disc deforms, axial locking occurs, resulting in axial force on the rotary table and affecting machining accuracy. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies existing in the prior art and provide a precision hydraulic brake module for a medium-sized rotary table.

[0004] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0005] A precision hydraulic brake module for a medium-sized rotary table, which is a precision hydraulic brake module for a medium-sized rotary table of a machining center. Specifically, it includes a rotor shaft and a brake housing. The rotor shaft is rotatably arranged in the brake housing. A connecting ring plate is arranged on the inner side wall of the brake housing. An annular brake spring piece capable of cooperating with the rotor shaft is arranged on the connecting ring plate. The annular brake spring piece and the inner side wall of the brake housing form an upper oil cavity and a lower oil cavity. A number of grooves are circumferentially distributed on the inner side wall of the annular brake spring piece, and an arc-shaped groove is opened in the middle of the annular brake spring piece. A sealing plate for closing the upper oil cavity is arranged at the upper end of the brake housing, and an oil inlet is opened on the sealing plate. A sealing cover for closing the lower oil cavity is arranged at the lower end of the brake housing. An oil injection channel communicating with the upper oil cavity and the lower oil cavity is opened on the brake housing, and the upper end of the oil injection channel is communicated with the oil inlet.

[0006] Further, a first sealing ring is arranged at the upper end of the upper oil cavity.

[0007] Further, a second sealing ring is arranged at the lower end of the lower oil cavity.

[0008] Further, a first channel hole is opened on the brake housing. The oil injection channel and the upper oil cavity are communicated by the first channel hole, and a first plug is arranged at one end of the first channel hole. A second channel hole is opened on the brake housing. The oil injection channel and the lower oil cavity are communicated by the second channel hole, and a second plug is arranged at one end of the second channel hole.

[0009] Further, the sealing plate and the brake housing are fixedly connected by bolts, and the sealing cover and the brake housing are fixedly connected by bolts.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] The utility model realizes braking through the cooperation between the annular brake spring piece of the shaft-holding type and the rotor shaft. By applying pressure to the annular brake spring piece with hydraulic oil, the braking process is fast and stable. The rotor shaft and the brake housing will not produce axial displacement, and precise positioning braking can be realized at any position; the structure of the utility model is simple, easy to process, has a large locking force, and is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the utility model;

[0013] Figure 2 is a schematic structural diagram of the brake housing of the utility model

[0014] Figure 3 is a schematic diagram of the external contour of the utility model.

[0015] In the figure: 1. Rotor shaft; 2. Brake housing; 3. Connecting ring plate; 4. Annular brake spring piece; 5. Upper oil cavity; 6. Lower oil cavity; 7. Groove; 8. Arc-shaped groove; 9. Sealing plate; 10. Oil inlet; 11. Sealing cover; 12. Oil injection channel; 13. First sealing ring; 14. Second sealing ring; 15. First channel hole; 16. Second channel hole; 17. First plug; 18. Second plug. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model.

[0017] As Figures 1 - 3 shown, a precision hydraulic brake module for a medium-sized rotary table includes a rotor shaft 1 and a brake housing 2. The rotor shaft 1 is rotatably arranged in the brake housing 2, and the rotor shaft 1 can rotate inside the brake housing 2;

[0018] A connecting ring plate 3 is arranged on the inner side wall of the brake housing 2, and an annular brake spring piece 4 that can cooperate with the rotor shaft 1 is arranged on the connecting ring plate 3. The annular brake spring piece 4 and the inner side wall of the brake housing 2 form an upper oil cavity 5 and a lower oil cavity 6. After injecting hydraulic oil into the upper oil cavity 5 and the lower oil cavity 6, the annular brake spring piece 4 is slightly deformed by the thrust of the hydraulic oil. Then, the outer side wall of the rotor shaft 1 is in close contact with the inner side wall of the annular brake spring piece 4, the friction force increases, and the rotor shaft 1 cannot rotate, realizing braking;

[0019] A plurality of grooves 7 are circumferentially distributed on the inner side wall of the annular brake spring piece 4, and an arc-shaped groove 8 is formed in the middle of the annular brake spring piece 4. The arc-shaped groove 8 and the grooves 7 make the annular brake spring piece 4 more likely to deform and rebound;

[0020] A sealing plate 9 for closing the upper oil cavity 5 is provided at the upper end of the brake housing 2, and an oil inlet 10 is formed in the sealing plate 9;

[0021] A sealing cover 11 for closing the lower oil cavity 6 is provided at the lower end of the brake housing 2; an oil injection channel 12 communicating with the upper oil cavity 5 and the lower oil cavity 6 is formed in the brake housing 2. The upper end of the oil injection channel 12 is communicated with the oil inlet 10. The oil inlet 10 facilitates injecting hydraulic oil into the oil injection channel 12. The hydraulic oil enters the upper oil cavity 5 and the lower oil cavity 6 through the oil injection channel 12. The sealing cover 11 and the sealing plate 9 prevent the hydraulic oil from leaking.

[0022] Further, a first sealing ring 13 is provided at the upper end of the upper oil cavity 5, and the first sealing ring 13 prevents the hydraulic oil in the upper oil cavity 5 from leaking.

[0023] Further, a second sealing ring 14 is provided at the lower end of the lower oil cavity 6, and the second sealing ring 14 prevents the hydraulic oil in the lower oil cavity from leaking.

[0024] Further, a first channel hole 15 is formed in the brake housing 2. The oil injection channel 12 and the upper oil cavity 5 are communicated by means of the first channel hole 15. A first plug 17 is provided at one end of the first channel hole 15. The hydraulic oil in the oil injection channel 12 enters the upper oil cavity 5 through the first channel hole 15. The first plug 17 seals the outer end of the first channel hole 15 to prevent leakage;

[0025] A second channel hole 16 is formed in the brake housing 2. The oil injection channel 12 and the lower oil cavity 6 are communicated by means of the second channel hole 16. A second plug 18 is provided at one end of the second channel hole 16. The hydraulic oil in the oil injection channel 12 enters the lower oil cavity 6 through the second channel hole 16. The second plug 18 seals the outer end of the second channel hole 16 to prevent leakage. The horizontally penetrating first channel hole 15 and the second channel hole 16 are convenient for processing.

[0026] Further, the sealing plate 9 and the brake housing 2 are fixedly connected by bolts, and the sealing cover 11 and the brake housing 2 are fixedly connected by bolts.

[0027] Working principle: When the precision hydraulic brake module of the medium-sized rotary worktable of the present utility model is in use, high-pressure hydraulic oil enters the oil injection channel 12 through the oil inlet 10 and then enters the upper oil cavity 5 and the lower oil cavity 6. The high-pressure hydraulic oil pushes the inner side wall of the annular brake spring piece 4 to deform. Subsequently, the outer side wall of the rotor shaft 1 is in close contact with the inner side wall of the annular brake spring piece 4, the frictional force increases, and the rotor shaft 1 cannot rotate, achieving braking. The braking force is a uniform radial force along the circumferential direction, and there will be no axial displacement of the rotor shaft 1 and the brake housing 2. The rotor shaft 1 can be precisely positioned and braked at any position;

[0028] The arc-shaped groove 8 and the groove 7 on the inner side wall of the annular brake spring piece 4 make it easier for the annular brake spring piece 4 to deform and rebound;

[0029] When the high-pressure hydraulic oil is unloaded, the oil pressure disappears, the annular brake spring piece 4 rebounds, deforms and returns to its original position, the gap between the rotor shaft 1 and the inner side wall of the annular brake spring piece 4 is restored, and the rotor shaft 1 can rotate freely.

[0030] It can be understood that the above embodiments are only exemplary embodiments adopted to illustrate the principle of the present utility model, and the present utility model is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present utility model, and these modifications and improvements are also regarded as the protection scope of the present utility model.

Claims

1. A medium-sized rotary table precision hydraulic brake module, comprising a rotor shaft (1) and a brake housing (2), wherein the rotor shaft (1) is rotatably arranged in the brake housing (2), characterized in that: The inner wall of the brake housing (2) is provided with a connecting ring plate (3), and the connecting ring plate (3) is provided with an annular brake spring piece (4) capable of cooperating with the rotor shaft (1), and the annular brake spring piece (4) and the inner wall of the brake housing (2) form an upper oil chamber (5) and a lower oil chamber (6); a plurality of grooves (7) are distributed on the circumference of the inner wall of the annular brake spring piece (4), and an arc groove (8) is provided in the middle of the annular brake spring piece (4); a sealing plate (9) for closing the upper oil chamber (5) is provided at the upper end of the brake housing (2), and an oil inlet (10) is provided on the sealing plate (9); a sealing cover (11) for closing the lower oil chamber (6) is provided at the lower end of the brake housing (2); and an oil injection channel (12) connected to the upper oil chamber (5) and the lower oil chamber (6) is provided on the brake housing (2), and the upper end of the oil injection channel (12) is connected to the oil inlet (10).

2. The medium-sized rotary table precision hydraulic brake module according to claim 1 is characterized in that: A first sealing ring (13) is provided at the upper end of the upper oil chamber (5).

3. The medium-sized rotary table precision hydraulic brake module according to claim 1 is characterized in that: A second sealing ring (14) is provided at the lower end of the lower oil chamber (6).

4. The medium-sized rotary table precision hydraulic brake module according to claim 1 is characterized in that: The brake housing (2) is provided with a first channel hole (15), the oil injection channel (12) and the upper oil chamber (5) are connected via the first channel hole (15), and a first plug (17) is provided at one end of the first channel hole (15); the brake housing (2) is provided with a second channel hole (16), the oil injection channel (12) and the lower oil chamber (6) are connected via the second channel hole (16), and a second plug (18) is provided at one end of the second channel hole (16).

5. The medium-sized rotary table precision hydraulic brake module according to claim 1 is characterized in that: The sealing plate (9) and the brake housing (2) are connected and fixed by bolts, and the sealing cover (11) and the brake housing (2) are connected and fixed by bolts.

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