Brake device and machine tool

Abstract

The braking device comprises a brake ring, a fixing piece and a sealing ring, the brake ring is used for being arranged on the periphery of a rotating shaft in a sleeving mode, and the brake ring is provided with at least one cutting groove extending in the axial direction of the rotating shaft; the fixing piece is arranged on the periphery of the brake ring and fixedly connected with the brake ring, and a containing cavity is formed between the fixing piece and the brake ring; the sealing ring has elasticity and is arranged in the containing cavity, and a sealing cavity is formed between the sealing ring and the fixing piece. The fixing piece is provided with a conveying channel, after media are conveyed into the sealing cavity through the conveying channel, the sealing ring extrudes the brake ring under the action of the media, and then the brake ring tightly holds the rotating shaft. The braking device has the advantages that the number of parts is small, machining and assembling are easy, the manufacturing cost is low, meanwhile, damage is not likely to happen, the failure rate is low, and in addition, the good braking effect is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of numerical control equipment, and in particular to a braking device and a machine tool. Background Art

[0002] At present, in machine tools, the A, B, C and other rotating axes of the turntable and the swing head need to stop at a specified angle after rotation for processing. At this time, a clamping force is applied to the rotating axis to keep its position angle unchanged (i.e. braking). However, the current braking device has the disadvantages of complex structure and large space required.

[0003] There is an urgent need to improve the brake device to ensure the braking effect of the brake device. Summary of the invention

[0004] The present application mainly provides a braking device and a machine tool, which have a simple structure and can have a good braking effect when used.

[0005] In order to solve the above technical problems, the technical solution adopted in the present application is: to provide a braking device, which includes a brake ring, a fixing part and a sealing ring, wherein the brake ring is used to be sleeved on the periphery of the rotating shaft, and the brake ring is provided with at least one cutting groove extending axially along the rotating shaft; the fixing part is arranged on the periphery of the brake ring and is fixedly connected to the brake ring, wherein an accommodating cavity is formed between the fixing part and the brake ring; the sealing ring is elastic, arranged in the accommodating cavity, and a sealed cavity is formed between the fixing part; wherein the fixing part is provided with a transmission channel, when the medium is transmitted to the sealed cavity through the transmission channel, under the action of the medium, the sealing ring squeezes the brake ring, thereby making the brake ring hug the rotating shaft.

[0006] There are multiple grooves, and the multiple grooves are arranged at equal intervals along the circumference of the brake ring.

[0007] Wherein, an annular first groove is provided on the outer peripheral surface of the sealing ring, and the fixing member seals the first groove to form the sealing cavity.

[0008] Among them, the outer peripheral surface of the sealing ring is further provided with a plurality of annular second grooves, and the plurality of second grooves are distributed on both sides of the first groove in the axial direction of the rotating shaft, and the width of the second groove is smaller than the width of the first groove. An annular sealing ring is arranged in the second groove, and the width direction of the first groove and the second groove is parallel to the axial direction of the rotating shaft.

[0009] Wherein, the brake ring comprises a first end and a second end which are spaced apart in the axial direction of the rotating shaft, and inner circumferential surfaces of the first end and the second end are both provided with an annular third groove.

[0010] The inner circumferential surfaces of the first end and the second end are both provided with two annular third grooves spaced apart from each other, wherein the closer the end is to the brake ring, the smaller the width of the third groove is.

[0011] Wherein, a through hole communicating with the transmission channel is provided on the outer peripheral surface of the fixing member, and the braking device further includes a high-pressure plug for sealing the through hole.

[0012] Wherein, the brake ring has a flange, and the fixing piece is fixedly connected to the brake ring via the flange.

[0013] Wherein, the material of the brake ring includes copper, and the material of the sealing ring includes rubber.

[0014] In order to solve the above technical problems, the technical solution adopted in the present application is: to provide a machine tool, which includes the braking device described in the above embodiment.

[0015] The beneficial effect of the present application is that in the brake device of the present application, after the medium is transmitted to the sealing cavity through the transmission channel, the sealing ring squeezes the brake ring under the action of the medium, and then the brake ring hugs the rotating shaft to achieve braking of the rotating shaft. The brake device of the present application has the advantages of few parts, simple processing and assembly, and low manufacturing cost. At the same time, it is not easy to be damaged, has a low failure rate, and has a good braking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them: Figure 1 This is a structural schematic diagram of an implementation method of a brake tightening device in this application; Figure 2 for Figure 1 A schematic side view of the structure of an embodiment of a brake ring in a middle brake tightening device; Figure 3 for Figure 1 A schematic structural diagram of an implementation scheme of a brake ring in a middle brake tightening device; Figure 4 for Figure 1 A schematic cross-sectional view of an embodiment of the center brake device A region.

[0017] Explanation of the reference numerals: 1 braking device; 2 rotating shaft; 10 brake ring; 11 cutting groove; 12 first end; 13 second end; 14 third groove; 15 flange; 20 fixing member; 21 transmission channel; 22 accommodating chamber; 23 through hole; 24 high-pressure plug; 30 sealing ring; 31 sealing chamber; 32 first groove; 33 second groove; 34 sealing ring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0020] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0021] 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.

[0022] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0023] See also Figure 1 , Figure 2 and Figure 3 The present application provides a braking device 1, which includes a brake ring 10, a fixing member 20 and a sealing ring 30, wherein the brake ring 10 is used to be sleeved on the periphery of a rotating shaft 2, and the brake ring 10 is provided with at least one cutting groove 11 extending axially along the rotating shaft 2; the fixing member 20 is arranged on the periphery of the brake ring 10 and is fixedly connected to the brake ring 10, wherein an accommodating cavity 22 is formed between the fixing member 20 and the brake ring 10; the sealing ring 30 is elastic, is arranged in the accommodating cavity 22, and forms a sealing cavity 31 between the fixing member 20; wherein the fixing member 20 is provided with a transmission channel 21, when a medium is transmitted to the sealing cavity 31 through the transmission channel 21, under the action of the medium, the sealing ring 30 squeezes the brake ring 10, thereby making the brake ring 10 hold the rotating shaft 2 tightly.

[0024] Specifically, the groove 11 in the brake ring 10 extends along the axial direction of the rotating shaft 2. When the brake ring 10 clamps the rotating shaft 2, the groove 11 provides space for the brake ring 10 to deform, thereby improving the braking effect. The fixing member 20 is used to fix the position of the brake ring 10. The fixing member 20 is arranged on the periphery of the brake ring 10, which helps to reduce the space occupied by the brake device 1. The sealing ring 30 is located in the accommodating chamber 22 between the fixing member 20 and the brake ring 10. The sealing ring 30 is attached to the side of the brake ring 10. Since the groove 11 in the brake ring 10 can increase the deformation of the brake ring 10, the brake ring 10 does not have a sealing performance at this time. Through the design of the sealing ring 30, the defect of the brake ring 10 not being sealed can be compensated and a sealing effect can be played. At this time, a sealing chamber 31 is formed between the sealing ring 30 and the fixing member 20. After the medium is transmitted to the sealing chamber 31 through the transmission channel 21, the pressure of the sealing chamber 31 is increased. At this time, under the action of the medium, the sealing ring 30 has elasticity and can be deformed, and further squeezes the brake ring 10, and the brake ring 10 further holds the rotating shaft 2 to achieve braking.

[0025] In one embodiment, the medium includes hydraulic oil, which enters the sealing chamber 31 through the transmission channel 21 on the fixing member 20, so that the pressure of the sealing chamber 31 increases, thereby squeezing the sealing ring 30, and the sealing ring 30 further applies pressure to the brake ring 10, so that the clamping force between the brake ring 10 and the rotating shaft 2 increases after the brake ring 10 is deformed, thereby achieving braking. At this time, the braking function is achieved within the elastic deformation range of the brake ring 10, extending the service life of the braking device 1. When the transmission medium is not introduced into the sealing chamber 31, at this time, there is a gap between the brake ring 10 and the rotating shaft 2, so as to prevent the brake ring 10 from affecting the normal operation of the rotating shaft 2.

[0026] The braking device 1 in the present application has a simple structure and requires a small space for use, and can achieve the clamping and releasing functions in a relatively small space; it is easy to use and has a good braking effect; at the same time, it has fewer parts and a low manufacturing cost; in addition, it uses a hydraulic drive method to achieve a larger clamping force.

[0027] See also Figure 2 and Figure 3 The number of the grooves 11 is multiple, and the multiple grooves 11 are evenly spaced along the circumference of the brake ring 10. The grooves 11 extend along the axial direction of the rotating shaft 2 and are evenly spaced along the circumference of the brake ring 10, so that the deformation of the copper sleeve is increased when the brake device 1 brakes to ensure that sufficient clamping force can be provided.

[0028] Please continue reading Figure 1 A first annular groove 32 is provided on the outer peripheral surface of the sealing ring 30, and the fixing member 20 seals the first groove 32 to form a sealing cavity 31. Specifically, through the setting of the first groove 32, a sealing cavity 31 is formed between the fixing member 20 and the sealing ring 30, so that after the medium is subsequently transmitted to the sealing cavity 31 through the transmission channel 21, the sealing ring 30 is directly squeezed under the action of the medium to deform the sealing ring 30, and then the sealing ring 30 squeezes the brake ring 10, thereby causing the brake ring 10 to hold the rotating shaft 2 tightly.

[0029] Please continue reading Figure 1 and Figure 4 The outer circumferential surface of the sealing ring 30 is further provided with a plurality of annular second grooves 33, which are distributed on both sides of the first groove 32 in the axial direction of the rotating shaft 2, and the width of the second groove 33 is smaller than the width of the first groove 32. An annular sealing ring 34 is arranged in the second groove 33, wherein the width directions of the first groove 32 and the second groove 33 are parallel to the axial direction of the rotating shaft 2. Specifically, the first groove 32 is mainly provided for braking operation, and the combination of the second groove 33 and the annular sealing ring 34 plays a sealing role on the basis of using hydraulic oil as a medium, so as to prevent the hydraulic oil from leaking and affecting the service life of the brake device 1.

[0030] The sealing ring 34 is made of an elastic material. Specifically, the sealing ring 34 can maintain a sealing effect even when the sealing ring 30 is deformed. In one embodiment, the sealing ring 34 is made of at least one of polytetrafluoroethylene (PTFE) and rubber to ensure a sealing effect.

[0031] Please continue reading Figure 1 The brake ring 10 includes a first end 12 and a second end 13 spaced apart in the axial direction of the rotating shaft 2, and the inner circumferences of the first end 12 and the second end 13 are both provided with an annular third groove 14. Specifically, the inner circumferences of the first end 12 and the second end 13, i.e., the side of the brake ring 10 adjacent to or in contact with the rotating shaft 2, the provision of the third groove 14 can reduce the wall thickness of the brake ring 10, which is conducive to deformation.

[0032] Please continue reading Figure 1 The inner circumferences of the first end 12 and the second end 13 are both provided with two annular third grooves 14 spaced apart, wherein the closer to the end of the brake ring 10, the smaller the width of the third groove 14. Specifically, in order to ensure the braking effect of the brake ring 10, the width of the third groove 14 close to the end of the brake ring 10 is smaller than the width of the third groove 14 far from the end of the brake ring 10.

[0033] Please continue reading Figure 1 The outer peripheral surface of the fixing member 20 is provided with a through hole 23 communicating with the transmission channel 21, and the brake device 1 further includes a high-pressure plug 24 for plugging the through hole 23. Specifically, the through hole 23 connects the transmission channel 21 and the sealing cavity 31. For the convenience of processing, the through hole 23 extends from the outside of the fixing member 20 to the sealing cavity 31. At this time, the high-pressure plug 24 needs to be provided to plug the through hole 23 to prevent the medium from flowing out from the side of the through hole 23 away from the sealing cavity 31.

[0034] Please continue reading Figure 1 , Figure 2 and Figure 3 The brake ring 10 has a flange 15, and the fixing member 20 is fixedly connected to the brake ring 10 through the flange 15. Specifically, the orthographic projection of the flange 15 of the brake ring 10 on the fixing member 20 covers at least part of the fixing member 20. At this time, the fixing member 20 and the brake ring 10 are fixedly connected by the fastener, and the fixing effect is good.

[0035] In one embodiment, the material of the brake ring 10 includes copper, and the material of the sealing ring 30 includes rubber. Specifically, copper has a certain elasticity and can be deformed under high pressure, which meets the elastic deformation requirements of the brake ring 10 and has a long service life. At the same time, copper will not wear the rotating shaft 2 when in contact with the brake ring 10. At the same time, a special rubber sealing ring 30 is used to play a role of sealing and deformation, thereby ensuring the braking effect.

[0036] The present application also provides a machine tool, which includes the braking device 1 described in the above embodiment. The machine tool using the braking device 1 can brake the rotating shaft 2 simply and effectively.

[0037] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A braking device, characterized in that: include: A brake ring, used for being sleeved on the periphery of the rotating shaft, wherein the brake ring is provided with at least one cutting groove extending axially along the rotating shaft; A fixing member, arranged at the periphery of the brake ring and fixedly connected to the brake ring, wherein an accommodating cavity is formed between the fixing member and the brake ring; A sealing ring, which is elastic and disposed in the accommodating cavity, and forms a sealing cavity with the fixing member; The fixing member is provided with a transmission channel. When the medium is transmitted to the sealing cavity through the transmission channel, the sealing ring squeezes the brake ring under the action of the medium, thereby causing the brake ring to tightly embrace the rotating shaft.

2. The brake device according to claim 1, characterized in that: The number of the cutting grooves is multiple, and the multiple cutting grooves are arranged at equal intervals along the circumference of the brake ring.

3. The brake device according to claim 1, characterized in that: An annular first groove is arranged on the outer peripheral surface of the sealing ring, and the fixing member seals the first groove to form the sealing cavity.

4. The brake device according to claim 3, characterized in that: The outer peripheral surface of the sealing ring is further provided with a plurality of annular second grooves, which are distributed on both sides of the first groove in the axial direction of the rotating shaft, the width of the second groove is smaller than the width of the first groove, and an annular sealing ring is arranged in the second groove, wherein the width directions of the first groove and the second groove are parallel to the axial direction of the rotating shaft.

5. The brake device according to claim 1, characterized in that: The brake ring comprises a first end and a second end which are spaced apart in the axial direction of the rotating shaft, and inner circumferential surfaces of the first end and the second end are both provided with an annular third groove.

6. The brake device according to claim 5, characterized in that: The inner circumferential surfaces of the first end and the second end are both provided with two annular third grooves spaced apart from each other, wherein the closer the end is to the brake ring, the smaller the width of the third groove is.

7. The brake device according to claim 1, characterized in that: A through hole communicating with the transmission channel is provided on the outer peripheral surface of the fixing member, and the braking device further comprises: A high-pressure plug is used to seal the through hole.

8. The brake device according to claim 1, characterized in that: Also includes: The brake ring has a flange, and the fixing piece is fixedly connected to the brake ring via the flange.

9. The brake device according to claim 1, characterized in that: The material of the brake ring includes copper, and the material of the sealing ring includes rubber.

10. A machine tool, characterized in that: Comprising a braking device as described in any one of claims 1-9.

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