Hydraulic rotary brake mechanism, rotary table and machine tool

Abstract

The hydraulic rotary brake mechanism comprises a cylinder body and a rotary ring, the cylinder body is provided with a U-shaped cavity with a shrunk opening, the edge of the rotary ring extends into the U-shaped cavity from the opening of the U-shaped cavity, the cylinder body clamps the edge of the rotary ring from the two sides, and the rotary ring is arranged on the rotary table. The cylinder body is provided with a sealing piece in the U-shaped cavity, the sealing piece defines a closed oil cavity on the side, away from the rotating ring, of the U-shaped cavity, and the cylinder body is provided with an oil hole communicated with the oil cavity. According to the technical scheme, the brake device is simple in structure, easy to maintain, wide in use scene and stable in brake effect, the brake device is in a clamping state in a normal state, and the problems that a gear mechanical brake mechanism is mainly controlled by a motor and cannot be automatically locked under normal power failure, and a workpiece is prone to slipping in a machining state due to unstable clamping are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lathe field, in particular to a kind of hydraulic rotary brake mechanism, rotary table and lathe. BACKGROUND

[0002] Brake mechanism is the important mechanism of lathe equipment, for example, brake mechanism is the key core component of lathe rotary table, its role is when workpiece is processed, clamping rotary table chuck face, prevent workpiece from displacement when being processed.The brake mechanism of existing generally is hydraulic piston brake mechanism, pneumatic brake mechanism, gear mechanical brake mechanism etc..Above brake mechanism has its limitation in actual work, among them, hydraulic piston brake mechanism is higher to part processing requirement, mechanism is complex, and not easy to maintain;Pneumatic brake mechanism uses scene single, small application range, and prone to failure, and gas has compressibility, unstable phenomenon is easily generated in use process;Gear mechanical brake mechanism mainly relies on motor control, under normal power failure, cannot be automatically locked, and unstable clamping is prone to cause workpiece to produce slip under processing state. SUMMARY

[0003] The utility model discloses a kind of hydraulic rotary brake mechanism, rotary table and lathe, to at least solve one of the technical problems existing in prior art.

[0004] The utility model discloses the technical scheme for solving its technical problem is as follows:

[0005] First, a kind of hydraulic rotary brake mechanism, including cylinder and rotating ring, the cylinder is equipped with the U-shaped cavity of opening reduction, the edge of the rotating ring is by the opening of the U-shaped cavity into the U-shaped cavity, the cylinder is from both sides and clamps the edge of the rotating ring, the cylinder is equipped with sealing element in the U-shaped cavity, the sealing element defines the airtight oil cavity on the side of the U-shaped cavity away from the rotating ring, the cylinder is equipped with the oil hole being communicated with the oil cavity.

[0006] In combination with first aspect, in certain implementation of the first aspect, the cylinder is annular along the circumferential direction of the rotating ring, and the sealing element includes sealing ring, and the sealing ring defines the airtight annular oil cavity on the side of the U-shaped cavity away from the rotating ring.

[0007] In combination with first aspect and above implementation, in certain implementation of the first aspect, the U-shaped cavity extends along the radial direction of the cylinder, and forms opening on the inner circumferential surface of the cylinder, and the outer edge of the rotating ring is by the opening of the U-shaped cavity into the U-shaped cavity along radial direction.

[0008] In conjunction with the first aspect and the above-described implementations, in some implementations of the first aspect, the cylinder body includes a first cylinder body component and a second cylinder body component. Both the first cylinder body component and the second cylinder body component are annular. One end face of the first cylinder body component is provided with a semi-U-shaped groove, and one end face of the second cylinder body component is provided with a semi-U-shaped groove. The first cylinder body component and the second cylinder body component are connected at the bottom of the semi-U-shaped groove. The cylinder body forms the U-shaped cavity through the semi-U-shaped grooves of the first cylinder body component and the second cylinder body component.

[0009] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the first cylinder component and the second cylinder component are fastened together by a plurality of fasteners distributed circumferentially, and the first cylinder component and the second cylinder component are provided with a first annular groove on their mating end faces, and a sealing ring is provided in the first annular groove.

[0010] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the cylinder body is provided with a fixing ring on the side of the sealing ring away from the oil chamber, the fixing ring abuts against the sealing ring, and the first cylinder body component and the second cylinder body component are provided with opposing second annular grooves on the inner walls of both sides of the U-shaped cavity, the fixing ring being disposed in the second annular groove.

[0011] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, both the first cylinder component and the second cylinder component include a connecting portion located at the bottom of the semi-U-shaped groove and a clamping portion extending from the connecting portion toward the opening direction of the U-shaped cavity. The connecting portion is provided with a plurality of connecting holes, and the clamping portion is inclined toward the inner side of the U-shaped cavity along the extending direction.

[0012] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the oil hole includes an oil inlet hole and an oil outlet hole disposed on the connecting portion.

[0013] In a second aspect, a turntable includes the hydraulic rotary brake mechanism described in any implementation of the first aspect.

[0014] Thirdly, a machine tool including a rotary table as described in any implementation of the second aspect.

[0015] One of the above technical solutions has at least one of the following advantages or beneficial effects: In the technical solution of the utility model, the rotating ring is installed on the rotating shaft system as a rotating mechanism, and can rotate together with the rotating shaft system when loosened, and drives the rotating shaft system to stop moving when clamped. In the normal state of the technical solution of the utility model, the cylinder body is clamped from both sides to the edge of the rotating ring extending into the U-shaped cavity, generating a large friction force, at this time the hydraulic rotary brake is in the clamping brake state, the rotating ring drives the rotating shaft system to stop rotating and cannot displace in the rotating direction, achieving the effect of clamping the rotary table brake; when the brake needs to be loosened, the oil hole is connected to the hydraulic oil to make the oil cavity and the U-shaped cavity expand, the opening gap of the U-shaped cavity of the cylinder body increases, at this time the rotating ring can rotate normally, the rotating direction of the rotating ring is in a free state, and the rotating shaft system can rotate freely, achieving the effect of loosening the brake.

[0016] Compared with the existing hydraulic piston brake, the technical solution of the utility model has the advantages of simple structure, easy maintenance, and solves the pain points of high machining requirement of the existing hydraulic piston brake mechanism, complex mechanism, and difficult maintenance.

[0017] Compared with the existing pneumatic brake mechanism, the technical solution of the utility model has the advantages of wide use scene, stable brake effect, solves the pain points of single use scene of the pneumatic brake mechanism, small application range, easy to malfunction, and the compressibility of gas, and the phenomenon of unstable clamping in the use process;

[0018] The technical solution of the utility model is in a clamping state in a normal state, solves the pain points that the gear mechanical brake mechanism mainly relies on motor control, cannot be automatically locked in a normal power-off state, and is easy to cause the workpiece to slip in an unstable clamping state.

[0019] The additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or will be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and / or additional aspects and advantages of the utility model will become apparent and easy to understand from the description of the embodiments combined with the following drawings, in which:

[0021] Figure 1 is an embodiment structure top view of the hydraulic rotary brake mechanism of the utility model;

[0022] Figure 2 is Figure 1 is the section view at A-A in the embodiment structure;

[0023] Figure 3 is an embodiment structure explosion view of the hydraulic rotary brake mechanism of the utility model;

[0024] Figure 4is an embodiment structure schematic view of the hydraulic rotary brake mechanism of the utility model;

[0025] Figure 5 is an embodiment structure schematic view of the rotary table of the utility model. DETAILED DESCRIPTION

[0026] This part will describe the specific embodiments of the utility model in detail, the preferred embodiments of the utility model are shown in the drawings, the role of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the utility model, but it cannot be understood as the limitation of the protection scope of the utility model.

[0027] In the utility model, if the direction (up, down, left, right, front and back) is described, it is only for the convenience of describing the technical scheme of the utility model, and it is not indicated or implied that the indicated technical feature must have a specific orientation, structure and operation, so it cannot be understood as the limitation of the utility model.

[0028] In the utility model, the meaning of "several" is one or more, the meaning of "multiple" is more than two, "more than" "less than" "exceed" and the like are understood as not including the number; "above" "below" "within" and the like are understood as including the number. In the description of the utility model, if "first" "second" is described, it is only used for distinguishing technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0029] In the utility model, unless otherwise explicitly limited, the words "set", "install", "connect" and the like should be broadly understood, for example, it can be directly connected, or indirectly connected through an intermediate medium; it can be fixedly connected, or detachably connected, or integrally formed; it can be mechanically connected, or electrically connected or capable of communicating with each other; it can be the communication or interaction relationship between two elements inside or two elements. The skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0030] Referring to Figures 1-4This utility model provides a hydraulic rotary brake mechanism, including a cylinder 100 and a rotating ring 200. The cylinder 100 has a U-shaped cavity 101 with a narrowed opening. In other words, the cylinder 100 has a cavity inside, with an opening at one end. The cavity is roughly U-shaped, and the gap between the openings of the U-shaped cavity 101 narrows towards the opening. The edge of the rotating ring 200 extends into the U-shaped cavity 101 through the opening. The cylinder 100 clamps the edge of the rotating ring 200 from both sides, forming a clamping brake structure. The cylinder 100 has a sealing element 300 in the U-shaped cavity 101. The sealing element 300 contacts or connects to the cavity wall of the U-shaped cavity 101, and the sealing element 300 defines a sealed oil chamber on the side of the U-shaped cavity 101 away from the rotating ring 200. The cylinder 100 has an oil hole communicating with the oil chamber.

[0031] Combination Figures 1-5 In the technical solution of this utility model, the rotating ring 200 is installed on the rotating shaft system as a rotating mechanism, for example, in Figure 5 In the illustrated embodiment, the rotating ring 200 is mounted on the rotary shaft system of the turntable. When the rotating ring 200 is released, it can rotate together with the rotary shaft system. When the rotating ring 200 is clamped, it causes the rotary shaft system to stop moving. Under normal conditions, the cylinder 100 clamps the edges of the rotating ring 200, which extends into the U-shaped cavity 101, from both sides, generating a large frictional force. At this time, the hydraulic rotary brake is in a brake clamping state, and the rotating ring 200 causes the rotary shaft system to stop and cannot rotate, achieving the turntable brake clamping effect. When brake release is required, hydraulic oil is introduced into the oil hole, causing the oil chamber and the U-shaped cavity 101 to expand. The opening gap of the U-shaped cavity 101 of the cylinder 100 increases, allowing the rotating ring 200 to rotate normally. The rotation direction of the rotating ring 200 is in a free state, and the rotary shaft system can rotate freely, achieving the brake release effect.

[0032] The cylinder body 100 can be configured to be non-annular, for example, one or more non-annular cylinder bodies 100 are arranged along the circumferential direction of the rotating ring 200. The non-annular cylinder body 100 can clamp the rotating ring 200 locally in the circumferential direction to achieve the braking clamping function.

[0033] In some embodiments, see Figure 1 , Figure 3 , Figure 4 The cylinder body 100 is annular, extending along the circumference of the rotating ring 200. The seal 300 includes a sealing ring, which defines a sealed annular oil chamber for the U-shaped cavity 101 on the side away from the rotating ring 200. In this embodiment, the cylinder body 100 is annular in shape, which can cooperate with the complete annular edge of the rotating ring 200 during operation, thereby achieving a better braking effect and avoiding damage to the rotating ring 200 due to uneven force caused by local clamping.

[0034] In some embodiments, referring to Figure 2 , Figure 4 , the U-shaped cavity 101 extends along the radial direction of the cylinder body 100 and forms an opening on the inner circumferential surface of the cylinder body 100, and the outer edge of the rotating ring 200 extends into the U-shaped cavity 101 along the radial direction from the opening of the U-shaped cavity 101. In this embodiment, the cylinder body 100 and the rotating ring 200 are both in the form of a sheet-shaped ring structure with a certain thickness along the axial direction, which can be more compactly installed in a rotary table or other equipment, saving axial space.

[0035] It can be understood that the U-shaped cavity 101 can also be arranged to extend along the axial direction of the cylinder body 100, and correspondingly, the edge of the rotating ring 200 is arranged to extend into the opening of the U-shaped cavity 101 along the axial direction.

[0036] The cylinder body 100 can be in an integrated structure or an assembled structure. For example, in some embodiments, referring to Figure 2 , Figure 3 , Figure 4 , the cylinder body 100 includes a first cylinder body part 102 and a second cylinder body part 103, both of which are in the form of a ring and have a certain thickness along the axial direction. The one side end surface of the first cylinder body part 102 is provided with a half-U-shaped groove 104, and the one side end surface of the second cylinder body part 103 is also provided with a half-U-shaped groove 104. The first cylinder body part 102 and the second cylinder body part 103 are connected by face-to-face installation using the half-U-shaped grooves 104. The first cylinder body part 102 and the second cylinder body part 103 are connected at the groove bottom position of the half-U-shaped grooves 104, and the cylinder body 100 forms the U-shaped cavity 101 through the half-U-shaped grooves 104 of the first cylinder body part 102 and the second cylinder body part 103. In this embodiment, the cylinder body 100 adopts the assembled structure of the first cylinder body part 102 and the second cylinder body part 103, which can effectively reduce the manufacturing difficulty of the cylinder body 100, and also facilitates the disassembly and replacement of the sealing ring and other components inside the cylinder body 100.

[0037] Further, in some embodiments, referring to Figures 1-4, the first cylinder component 102 and the second cylinder component 103 are fastened and connected by a plurality of fasteners distributed in the circumferential direction, the first cylinder component 102 and the second cylinder component 103 are provided with a first ring groove at the matching end face, and the sealing ring 105 is arranged in the first ring groove. The first cylinder component 102, the second cylinder component 103, the sealing ring and the sealing ring 105 combine to form a closed oil cavity as the main working component of the brake mechanism, which functions to make the gap of the U-shaped cavity 101 between the first cylinder component 102 and the second cylinder component 103 smaller, clamp the rotating ring 200 and achieve clamping effect; when the oil hole is connected with hydraulic oil, the U-shaped cavity 101 is expanded, the gap between the first cylinder component 102 and the second cylinder component 103 is increased, and at this time the rotating ring 200 can rotate normally to achieve loosening effect.

[0038] In some embodiments, referring to Figures 2-4 , the cylinder 100 is provided with a fixing ring 400 on the side away from the oil cavity, the fixing ring 400 abuts against the sealing ring, the first cylinder component 102 and the second cylinder component 103 are provided with opposite second ring grooves on the inner wall surfaces of the two sides of the U-shaped cavity 101, the fixing ring 400 is arranged in the second ring groove 106, and the two side edges of the fixing ring 400 are respectively clamped into the second ring groove 106 of the first cylinder component 102 and the second cylinder component 103. The function of the fixing ring 400 is to limit the radial displacement of the sealing ring, so as to ensure that the first cylinder component 102, the second cylinder component 103, the sealing ring and the sealing ring 105 combine to form a closed oil cavity.

[0039] It can be understood that the sealing ring can also be connected with the first cylinder component 102 and the second cylinder component 103 by means of bonding and the like, so as to ensure that the first cylinder component 102, the second cylinder component 103, the sealing ring and the sealing ring 105 combine to form a closed oil cavity.

[0040] It can be understood that a limiting boss or the like can also be arranged on the first cylinder component 102 and the second cylinder component 103 to abut against the sealing ring from the back side, so as to ensure that the first cylinder component 102, the second cylinder component 103, the sealing ring and the sealing ring 105 combine to form a closed oil cavity.

[0041] In some embodiments, referring to Figure 3 , Figure 4, the first cylinder component 102 and the second cylinder component 103 each include a connecting portion 107 located at the bottom of the half U-shaped groove 104 and a clamping portion 108 extending from the connecting portion 107 to the opening direction of the U-shaped cavity 101, the connecting portion 107 is provided with a plurality of connecting holes 109, and the clamping portion 108 is inclined to the inside of the U-shaped cavity 101 along the extension direction. The first cylinder component 102 and the second cylinder component 103 can be connected as a whole through the fastener 110 arranged at the connecting hole 109 of the connecting portion 107. In addition, the whole hydraulic rotary brake mechanism can also be installed on the machine body such as a rotary table through the fastener arranged at the connecting hole 109 of the connecting portion 107.

[0042] In some embodiments, referring to Figure 4 、 Figure 5 The oil hole includes an oil inlet hole 111 and an oil outlet hole 112 arranged at the connecting portion 107. It can be understood that the oil inlet hole 111 and the oil outlet hole 112 can share an oil hole.

[0043] The embodiments of the utility model have the following effects:

[0044] 1. Simple structure, easy to maintain. The existing hydraulic piston brake needs to ensure that the piston matching surface has extremely high smoothness, has high machining requirements, and is difficult to machine. Moreover, the piston sealing ring 105 adopts a dynamic sealing structure, which is prone to sealing ring 105 wear, causing sealing failure. And due to the complex structure, maintenance is extremely difficult. The embodiments of the utility model have fewer components, and compared with the hydraulic piston brake, the piston mechanism has lower machining requirements for parts, and the sealing adopts a static sealing structure, which has lower sealing ring 105 wear and longer service life. The mechanism is simple, has no technical difficulty in disassembly, and is easy to maintain.

[0045] 2. Wide use scene, stable brake effect. The existing pneumatic brake mechanism has a single use scene and can only be used for small rotary tables, has a small application range, and is prone to failure and air leakage, which causes brake failure. Moreover, the gas is compressible, and the clamping is unstable during use. The embodiments of the utility model have a wide use scene, and different sizes of brake torque can be obtained by changing the size of the parts, that is, they can be used for large rotary tables and can also be used for small rotary tables. The brake torque is larger than that of the pneumatic brake, is stable, is not prone to air leakage, and does not produce unstable clamping in the working state.

[0046] 3. Normal state is clamping state. The existing gear mechanical brake mechanism mainly relies on motor control, cannot be automatically locked under normal power-off, and is prone to workpiece slip under unstable clamping machining state. The embodiments of the utility model are in clamping state under normal state, can be normally clamped even if power-off suddenly, and have high safety. Moreover, the workpiece is not prone to slip under stable clamping machining state

[0047] The embodiment of the utility model further provides a rotary table, including hydraulic rotation brake mechanism in any one of above embodiment.

[0048] In combination Figure 5 , the hydraulic rotation brake is fixed on the machine body 501 of the rotary table by screw through the connecting hole 109 on the cylinder body 100, and the rotary ring 200 is installed on the rotary shaft 502 by screw. When the U-shaped cavity 101 formed by the cylinder body 100 is in the contracted state under the action of no external force, the rotary ring 200 is tightly attached to the end face of the cylinder body 100 to generate great friction force, at this time, the hydraulic rotation brake is in the clamping brake state, the rotary ring 200 drives the rotary shaft system of the rotary table to stop and cannot rotate, so that the clamping brake effect of the rotary table is achieved. When brake release is needed, the oil inlet hole of the cylinder body 100 is opened, the oil outlet hole is closed, and hydraulic oil is input from the oil inlet hole. Since the sealing element 300 defines a closed oil cavity on the side away from the rotary ring 200 of the U-shaped cavity 101, the cavity is full of hydraulic oil and expands, and the sealing ring cannot be radially displaced under the limiting action of the fixed ring 400. At this time, the cylinder body 100 slightly deforms in the axial direction, the opening of the U-shaped cavity 101 changes from the contracted state to the released state, the end face of the cylinder body 100 is separated from the rotary ring 200, the rotary ring 200 is in the free state in the rotating direction, and the rotary shaft system of the rotary table can rotate freely, so that the brake release effect of the rotary table is achieved. When clamping is needed again, the oil inlet hole is closed and the oil outlet hole is opened. The hydraulic oil is discharged from the oil outlet hole, the U-shaped cavity 101 returns to the contracted state, the rotary ring 200 is tightly attached to the end face of the fixed cylinder body 100 to generate great friction force, and the hydraulic rotation brake is in the clamping brake state.

[0049] The embodiment of the utility model further provides a machine tool, including the rotary table in any one of above embodiment.

[0050] In the description of the present application, the description of the terms "example", "embodiment" or "some embodiments" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the utility model. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] Of course, the present application is not limited to the above-mentioned embodiments, and those skilled in the art can make equivalent modifications or replacements without departing from the spirit of the utility model, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A hydraulic rotary brake mechanism characterized by comprising: The cylinder body is annular along the circumferential direction of the rotating ring, and the sealing ring defines a closed annular oil cavity on the side away from the rotating ring.

2. The hydraulic rotary brake mechanism according to claim 1, wherein The U-shaped cavity extends along the radial direction of the cylinder body and forms an opening on the inner circumferential surface of the cylinder body, and the outer edge of the rotating ring extends into the U-shaped cavity along the radial direction.

3. The hydraulic rotary brake mechanism according to claim 2, wherein The cylinder body includes a first cylinder part and a second cylinder part, both of which are annular, one side end surface of the first cylinder part is provided with a half U-shaped groove, one side end surface of the second cylinder part is provided with a half U-shaped groove, and the first cylinder part and the second cylinder part are connected at the groove bottom of the half U-shaped grooves, and the cylinder body forms the U-shaped cavity through the half U-shaped grooves of the first cylinder part and the second cylinder part.

4. The hydraulic rotary brake mechanism according to claim 2, wherein The first cylinder part and the second cylinder part are fastened and connected through a plurality of fasteners distributed along the circumferential direction, and the first cylinder part and the second cylinder part are provided with a first ring groove on the matched end surfaces, and the first ring groove is provided with a sealing ring.

5. The hydraulic rotary brake mechanism according to claim 4, wherein The cylinder body is provided with a fixing ring on the side of the sealing ring away from the oil cavity, the fixing ring abuts against the sealing ring, the first cylinder part and the second cylinder part are provided with opposite second ring grooves on the inner wall surfaces on both sides of the U-shaped cavity, and the fixing ring is arranged in the second ring groove.

6. The hydraulic rotary brake mechanism of claim 4, wherein, The first cylinder part and the second cylinder part each include a connecting part at the groove bottom of the half U-shaped groove and a clamping part extending from the connecting part to the opening direction of the U-shaped cavity, the connecting part is provided with a plurality of connecting holes, and the clamping part is inclined to the inside of the U-shaped cavity along the extension direction.

7. The hydraulic rotary brake mechanism of claim 4, wherein The oil hole includes an oil inlet hole and an oil outlet hole arranged in the connecting part.

8. The hydraulic rotary brake mechanism of claim 7, wherein, The hydraulic rotary brake mechanism includes the hydraulic rotary brake mechanism according to any one of claims 1-8.

9. A turntable, characterized by The rotary table includes the rotary table according to claim 9.

10. A machine tool, characterized by ​

Images