Pneumatic brake structure for rotary table

Abstract

The pneumatic brake structure for the rotary table comprises a brake shaft and a brake sleeve, and the brake shaft is fixedly installed between a flexible gear of a harmonic reducer and a main base disc of the rotary table. The brake sleeves are fixedly mounted on one side of a supporting seat of the rotary table, and the brake sleeves sleeve the brake shaft at intervals; the brake sleeve comprises a fixing ring and a friction ring, the friction ring is fixedly installed on the inner side of the fixing ring, a closed air bag can be formed between the fixing ring and the friction ring, the inner friction face of the friction ring is made of abrasion-resistant rubber, and an air connector communicated with the interior of the air bag is installed on the fixing ring. Compressed air is introduced into the air bag, so that the friction ring deforms to extrude the brake shaft to form braking. When faults and work faults occur, compressed air is used for pressurizing the friction ring, the friction ring deforms and tightly holds the brake shaft, the brake can be stopped immediately, loss is reduced, and safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of five-axis turntables, in particular to a pneumatic brake structure for turntables. Background Art

[0002] The five-axis rotary table is suitable for various machine tools such as CNC machine tools, grinders, engraving machines, etc. The existing five-axis rotary table is generally not equipped with a brake structure, and cannot be braked and stopped immediately during the processing process. When a fault or work error occurs, it may cause more losses and may also pose a safety hazard.

[0003] Therefore, we propose a pneumatic brake structure for a turntable to facilitate timely handling of production problems and ensure work safety. Utility Model Content

[0004] In view of this, the utility model provides a pneumatic brake structure for a turntable, which is used to solve the problem in the prior art that the existing five-axis turntable cannot be stopped immediately when an abnormal condition occurs during operation.

[0005] A pneumatic brake structure for a turntable, comprising a brake shaft and a brake sleeve, wherein the brake shaft is fixedly mounted between a flexible wheel of a harmonic reducer and a main seat disc of the turntable; the brake sleeve is fixedly mounted on one side of a support seat of the turntable, and the brake sleeve is spaced apart and sleeved on the brake shaft;

[0006] Among them, the brake sleeve includes a fixed ring and a friction ring. The friction ring is fixedly installed on the inner side of the fixed ring, and a closed air bag can be formed between the fixed ring and the friction ring. The inner friction surface of the friction ring is made of wear-resistant rubber. The fixed ring is equipped with an air joint connected to the inside of the air bag. By introducing compressed air into the air bag, the friction ring is deformed and the brake shaft is squeezed to form braking.

[0007] Preferably, the fixing ring is provided with an exhaust hole.

[0008] Preferably, the diameter of the exhaust hole is smaller than the inner diameter of the gas connector.

[0009] Preferably, the exhaust hole is connected to an exhaust pipe, one end of the exhaust pipe is connected to the inside of the support seat or the inside of the housing of the servo motor, and one side of the housing is connected to a bent pipe.

[0010] Preferably, one end of the gas connector is connected to a reversing solenoid valve, and one inlet of the reversing solenoid valve is connected to a compressed air supply pipeline, while the other inlet is left vacant for exhaust.

[0011] Preferably, a mounting groove is provided on one side of the support seat, and the fixing ring is fixedly installed in the mounting groove.

[0012] Preferably, the harmonic reducer is installed inside the support base, the servo motor is fixedly installed on one side of the support base, and the input end of the harmonic reducer is connected to the rotating shaft of the servo motor through a coupling.

[0013] Preferably, the surface of the brake shaft is configured as a friction surface.

[0014] Preferably, a sealing ring is further provided between the fixing ring and the friction ring.

[0015] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0016] The pneumatic brake structure for the turntable is adopted;

[0017] When a fault or working error occurs, the friction ring is pressurized by compressed air, and the friction ring deforms and holds the brake shaft tightly, which can stop immediately, reduce losses and improve safety;

[0018] An exhaust hole is provided and connected with the inside of the support base or the inside of the housing of the servo motor. When braking, the exhaust gas can be passed into the inside of the support base or the inside of the housing of the servo motor, thereby accelerating the heat dissipation; and the noise of some exhaust gas can be isolated and reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] in:

[0021] Figure 1 Schematic diagram of the structure of a pneumatic brake structure for a turntable in one embodiment.

[0022] Figure 2 is a schematic structural diagram of another perspective of a pneumatic brake structure for a turntable in one embodiment;

[0023] Figure 3 A schematic diagram of the exploded structure of a brake sleeve in one embodiment;

[0024] Figure 4 is a schematic diagram of an exploded structure of a pneumatic brake structure for a turntable in one embodiment;

[0025] Figure 5 Schematic diagram of the structure of a support base in one embodiment.

[0026] Figure numerals: 100, turntable; 101, main seat disc; 200, brake sleeve; 201, exhaust hole; 202, air connector; 203, brake shaft; 204, fixing ring; 205, friction ring; 206, sealing ring; 300, support seat; 301, mounting groove; 400, housing; 401, bent pipe; 402, servo motor; 500, harmonic reducer; 501, flexible wheel. DETAILED DESCRIPTION

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0028] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0029] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0030] Example 1

[0031] See also Figure 1-5 A pneumatic brake structure for a turntable includes a brake shaft 203 and a brake sleeve 200. The brake shaft 203 is fixedly installed between the flexible wheel 501 of the harmonic reducer 500 and the main seat disc 101 of the turntable 100; the brake sleeve 200 is fixedly installed on one side of the support seat 300 of the turntable, and the brake sleeve 200 is spaced apart on the brake shaft 203.

[0032] Among them, when implementing, Figure 3As shown in , the brake sleeve 200 includes a fixed ring 204 and a friction ring 205. The friction ring 205 is fixedly installed on the inner side of the fixed ring 204, and a closed air bag can be formed between the fixed ring 204 and the friction ring 205. The inner friction surface of the friction ring 205 is made of wear-resistant rubber. The fixed ring 204 is equipped with an air joint 202 connected to the inside of the air bag. By introducing compressed air into the air bag, the friction ring 205 is deformed to squeeze the brake shaft 203 to form a brake. In a specific implementation, the surface of the brake shaft 203 is set as a friction surface, such as a wear-resistant aluminum oxide rough surface. A sealing ring 206 is also arranged between the fixed ring 204 and the friction ring 205, and the sealing performance is enhanced by the sealing ring 206.

[0033] Specifically, during implementation, one end of the gas connector 202 is connected to a reversing solenoid valve, and one inlet of the reversing solenoid valve is connected to a compressed air supply pipeline, and the other inlet is left vacant for exhaust. The above arrangement, when in use, is controlled by a controller (the control center of the turntable) and directly by a button to switch the reversing solenoid valve. When one path is connected, compressed air can be injected into the air bag to brake, and when the other path is connected, exhaust can be performed to release the brake.

[0034] In addition, a mounting groove 301 is provided on one side of the support base 300, and the fixing ring 204 is fixedly installed in the mounting groove 301. The harmonic reducer 500 is installed inside the support base 300, and the servo motor 402 is fixedly installed on one side of the support base 300, and the input end of the harmonic reducer 500 is connected to the rotating shaft of the servo motor 402 through a coupling.

[0035] Example 2

[0036] Different from the first embodiment, in the implementation, the fixed ring 204 is provided with an exhaust hole 201. The diameter of the exhaust hole 201 is smaller than the inner diameter of the air connector 202. Through the pressure of the compressed air, even in the exhaust state of a small flow rate, the friction ring 205 can still be deformed and braked.

[0037] In this embodiment, a reversing solenoid valve is not required, and a common solenoid valve can be used. The solenoid valve is opened to control the air intake for braking; when the solenoid valve is closed, the gas is continuously discharged from the exhaust hole 201, thereby slowly releasing the brake. The advantages include cost saving, and another advantage is that the exhaust hole 201 will continuously eject airflow and generate noise when in the braking state, which can remind the user that the braking state is in progress; and the heat generated by the brake is quickly dissipated by ejecting the flowing compressed air, which is very convenient.

[0038] Example 3

[0039] Different from the second embodiment, an exhaust pipe is connected to the exhaust hole 201, one end of the exhaust pipe is connected to the inside of the support seat 300 or the inside of the housing 400 of the servo motor 402, and a curved pipe 401 is connected to one side of the housing 400. When braking, the servo motor 402 may generate more heat due to high load or overload.

[0040] On the basis of Example 2, the exhaust gas is reasonably utilized, and the exhaust gas passes through the interior of the support base 300 or the interior of the housing 400 of the servo motor 402 and is then discharged, thereby playing the role of cooling the bearings inside the support base 300 or the servo motor 402.

[0041] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A pneumatic brake structure for a turntable, characterized in that: include: A brake shaft (203), wherein the brake shaft (203) is fixedly mounted between a flexible wheel (501) of a harmonic reducer (500) and a main seat disc (101) of a turntable (100); A brake sleeve (200), wherein the brake sleeve (200) is fixedly mounted on one side of a support seat (300) of the turntable, and the brake sleeve (200) is sleeved on the brake shaft (203) in a spaced manner; The brake sleeve (200) comprises a fixed ring (204) and a friction ring (205), wherein the friction ring (205) is fixedly mounted on the inner side of the fixed ring (204), and a closed air bag can be formed between the fixed ring (204) and the friction ring (205), and the inner friction surface of the friction ring (205) is made of wear-resistant rubber, and an air connector (202) connected to the inside of the air bag is installed on the fixed ring (204), and compressed air is introduced into the air bag to deform the friction ring (205) and squeeze the brake shaft (203) to form braking.

2. The pneumatic brake structure for a turntable according to claim 1, characterized in that: The fixing ring (204) is provided with an exhaust hole (201).

3. The pneumatic brake structure for a turntable according to claim 2, characterized in that: The diameter of the exhaust hole (201) is smaller than the inner diameter of the gas connector (202).

4. The pneumatic brake structure for a turntable according to claim 3, characterized in that: An exhaust pipe is connected to the exhaust hole (201), one end of the exhaust pipe is communicated with the inside of the support seat (300) or the inside of the housing (400) of the servo motor (402), and a curved pipe (401) is connected to one side of the housing (400).

5. The pneumatic brake structure for a turntable according to claim 1, characterized in that: One end of the gas connector (202) is connected to a reversing solenoid valve, and one inlet of the reversing solenoid valve is connected to a compressed air supply pipeline, while the other inlet is left vacant for exhaust.

6. The pneumatic brake structure for a turntable according to claim 1, characterized in that: A mounting groove (301) is provided on one side of the support seat (300), and the fixing ring (204) is fixedly installed in the mounting groove (301).

7. The pneumatic brake structure for a turntable according to claim 4, characterized in that: The harmonic reducer (500) is installed inside the support base (300), the servo motor (402) is fixedly installed on one side of the support base (300), and the input end of the harmonic reducer (500) is connected to the rotating shaft of the servo motor (402) through a coupling.

8. The pneumatic brake structure for a turntable according to claim 1, characterized in that: The surface of the brake shaft (203) is configured as a friction surface.

9. The pneumatic brake structure for a turntable according to claim 1, characterized in that: A sealing ring (206) is also provided between the fixing ring (204) and the friction ring (205).

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