Brake device, swing head and machine tool

Abstract

The utility model relates to the field of machine tools, in particular to a brake device, a swing head and a machine tool, the brake device comprises a base, a rotating body, a brake cylinder assembly, a brake pad assembly and an elastic structure, a brake oil way and a brake groove are arranged on the brake cylinder assembly, and the brake pad assembly comprises a piston body and a brake disc. In a normal state, the elastic structure can push the piston body to be matched with the brake disc for braking, so that the rotating body is in a braking deceleration or braking state. When the rotating body needs to rotate, oil is injected into the brake groove through the brake oil way, oil pressure can push the piston body to extrude the elastic structure to contract, the brake disc is loosened, and therefore the rotating body can rotate normally. According to the brake mode, the problem that the rotating body cannot decelerate or brake when oil cannot be injected into the brake cylinder assembly is effectively reduced or avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of machine tool, specifically, relate to a brake device, swing head and machine tool. BACKGROUND

[0002] In the prior art, the swing head is generally braked by air pressure or hydraulic pressure to slow down or stop the rotation of the spindle seat. For example, when the swing head needs to be braked, oil or gas is injected into the swing head to brake the swing head by oil pressure or gas pressure, thereby slowing down the spindle seat. This braking method brakes when oil or gas is supplied to the swing head, and the spindle seat of the swing head can rotate freely when no oil or gas is supplied. For example, a swing head double composite brake device (patent number CN113074198A) is a patent that controls the swing head to stop rotating when hydraulic oil enters the first piston cylinder and the second piston cylinder from the oil cylinder through the oil circuit when the swing head needs to be braked.

[0003] However, this braking method has the problem that when the oil circuit or gas circuit system fails and the swing head cannot be filled with oil or gas, the brake may fail or malfunction, making it impossible for the swing head to brake normally. Based on the above problem, the existing swing head brake structure needs to be improved. UTILITY MODEL CONTENTS

[0004] To solve the above problems, the purpose of the utility model is to provide a brake device, a swing head and a machine tool to solve the problem that the swing head cannot be filled with oil or gas in the prior art, resulting in the swing head being unable to brake normally.

[0005] The purpose of the utility model is achieved by the following technical solutions:

[0006] The first aspect of the utility model provides a brake device, comprising:

[0007] A base, the two sides of the base correspondingly provided with a first ear plate and a second ear plate, a first shaft hole and a second shaft hole correspondingly provided on the first ear plate and the second ear plate, the first shaft hole and the second shaft hole are through and coaxial;

[0008] A rotating body rotatably arranged in the first shaft hole and the second shaft hole;

[0009] A brake cylinder assembly fixedly arranged in the second shaft hole, the brake cylinder assembly provided with a brake groove along the inner side wall;

[0010] A brake pad assembly comprising a piston body and a brake disc, the piston body arranged in the brake groove, and the brake disc fixed on the rotating body;

[0011] An elastic structure arranged on one side of the piston body along the circumference of the piston body, used for pushing the piston body to cooperate with the brake disc to brake;

[0012] The brake cylinder assembly is provided with a brake oil path, which is communicated with the brake groove and used to drive the piston body and the brake disc to be released from braking.

[0013] Further, the brake oil path comprises an oil inlet and an oil outlet. The oil inlet is located on the end face of the brake cylinder assembly close to the elastic structure. The oil outlet is communicated with the brake groove and located on the side of the brake groove away from the elastic structure.

[0014] Further, the brake pad assembly is arranged in the second shaft hole. The inner side of the brake disc is press-fitted and fixed on the rotating body. The outer side of the brake disc is matched with the inner side of the piston body. The outer side of the piston body is located in the brake groove. The brake groove leaves a space for the movement of the piston body along the axis direction of the second shaft hole.

[0015] Further, the brake cylinder assembly comprises:

[0016] The cylinder body is arranged in the second shaft hole. The oil outlet is arranged on the cylinder body. The cylinder body is provided with a first oil passage in the parallel direction of the axis of the cylinder body. The cylinder body is provided with a second oil passage in the radial direction. One end of the second oil passage is communicated with the first oil passage. The other end of the second oil passage is communicated with the oil outlet.

[0017] The cylinder cover is arranged on the cylinder body. The oil inlet is arranged on the cylinder cover in the parallel direction of the axis of the cylinder cover. The first oil passage is communicated with the oil inlet and the second oil passage.

[0018] The gland is tightly connected with the outer side of the cylinder cover. The cylinder body, the cylinder cover and the gland enclose the brake groove. The elastic structure is located between the piston body and the gland.

[0019] Further, the adjusting pad is detachably fastened on the cylinder cover. The outer side of the gland is fastened with the adjusting pad.

[0020] Further, a plurality of first oil passages are arranged in the circumferential direction of the cylinder body. A plurality of oil outlets matched with the plurality of first oil passages are arranged in the brake groove. A plurality of second oil passages for communicating the first oil passages and the oil outlets are arranged in the radial direction of the cylinder body. A plurality of oil inlets matched with the first oil passages are arranged in the circumferential direction of the cylinder cover.

[0021] Further, the brake disc comprises a gasket and a brake pad. The inner side of the brake pad is fastened on the rotating body through the gasket.

[0022] The first friction plate is fixed on the cylinder body. The second friction plate is fixed on the piston body. The outer side of the brake pad is arranged between the first friction plate and the second friction plate.

[0023] Further, the inner side of the cylinder body is provided with a first step surface and a second step surface. The outer circumferential side of the piston body is sealingly matched with the first step surface. The second step surface is provided with a groove surrounding the axis of the cylinder body.

[0024] The piston body extends a convex ring on one side of the rotating body, the convex ring is in sealing cooperation with the second step surface, and the cylinder body of the brake cylinder assembly, the piston body and the convex ring of the piston body enclose a sealing space.

[0025] The piston body is provided with a plurality of elastic holes, and the plurality of elastic holes are arranged along the circumferential direction of the piston body.

[0026] The second aspect of the utility model provides a swing head, comprising the brake device of any kind above, electric spindle, electric spindle is located between first ear plate and second ear plate, and the side of electric spindle is connected with rotating body.

[0027] The third aspect of the utility model provides a machine tool, comprising the brake device of any kind above or the swing head above.

[0028] The utility model discloses the beneficial effect lies in: when not through the brake oil circuit to inject oil into the brake device, the elastic structure pushes the piston body and the brake disc friction cooperation brake, so that the rotating body is in the brake state. When the rotating body needs to rotate, then injects the brake oil into the brake groove through the brake oil circuit. The oil pressure will push the piston body and extrude the elastic structure contraction, at this time, the friction between the piston body and the brake disc reduces or has no friction, and the rotating body can rotate normally. When stopping oil to the brake oil circuit, the elastic structure will push the piston body and the brake disc friction cooperation brake again by the elastic force of itself, and the rotating body brake deceleration or stops. The brake mode effectively reduces or avoids the problem that the main shaft cannot decelerate or stop when the oil cannot be injected into the rotating body. BRIEF DESCRIPTION OF DRAWINGS

[0029] The drawings described herein are used to provide further understanding of the utility model, and constitute a part of the application, and the illustrative embodiment of the utility model and its explanation are used to explain the utility model, and do not constitute improper limitation to the utility model. In the drawings:

[0030] Figure 1 It is the structure schematic diagram of the utility model stops device;

[0031] Figure 2 It is the sectional structure drawing of the utility model stops device;

[0032] Figure 3 It is the local enlarged view of the utility model stops device;

[0033] Figure 4 It is the structure schematic diagram of the brake cylinder assembly and brake piece assembly of the utility model;

[0034] Figure 5 It is the structure schematic diagram of the swing head of the utility model.

[0035] Wherein the reference signs are:

[0036] 1-base, 11-first ear plate, 111-first shaft hole, 12-second ear plate, 121-second shaft hole;

[0037] 2-rotating body;

[0038] 3-brake cylinder assembly, 31-cylinder body, 311-first oil hole, 312-second oil hole, 313-oil outlet, 314-first step surface, 315-second step surface, 316-groove, 32-cylinder cover, 321-oil inlet, 33-pressing cover, 34-brake groove, 35-brake oil path, 36-first friction plate;

[0039] 4-brake pad assembly, 41-piston body, 411-convex ring, 42-brake disc, 421-gasket, 422-brake pad, 43-second friction plate;

[0040] 5-elastic structure;

[0041] 6-adjustment pad;

[0042] 7-electric spindle. DETAILED DESCRIPTION

[0043] In order to make the person skilled in the art better understand the utility model scheme, the technical scheme in the utility model embodiments will be described clearly and completely below in conjunction with the drawings in the utility model embodiments. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor shall belong to the protection scope of the utility model.

[0044] The utility model embodiment first aspect provides a kind of brake device, reference Figures 1 to 4 , comprising: base 1, rotating body 2, brake cylinder assembly 3, brake pad assembly 4 and elastic structure 5.Base 1 is correspondingly provided with first ear plate 11 and second ear plate 12 on both sides. First ear plate 11 and second ear plate 12 are respectively provided with first shaft hole 111 and second shaft hole 121 through and coaxial, rotating body 2 is installed in second shaft hole 121, and can freely rotate relative to second shaft hole 121.Brake cylinder assembly 3 is annular structure, and is installed in second shaft hole 121 coaxially with second shaft hole 121, and brake cylinder assembly 3 inner wall is provided with brake groove 34, reference Figure 4The brake groove 34 is an annular groove surrounding along the axis of the brake cylinder assembly 3, used for accommodating the brake shoe assembly 4, and the brake groove 34 allows the brake shoe assembly 4 to move along the axis direction of the second shaft hole 121 within a certain range. The brake shoe assembly 4 includes a piston body 41 arranged in the brake groove 34 and a brake disc 42 fixed on the rotating body 2. The elastic structure 5 is arranged on one side of the piston body 41 along the circumferential direction of the piston body 41, used for pushing the piston body 41 to cooperate with the brake disc 42 to brake. The brake cylinder assembly 3 is provided with a brake oil passage 35, which is communicated with the brake groove 34, used for driving the piston body 41 to disengage from the brake disc 42. The elastic structure 5 adopts a spring or an elastic gasket, which can be a disc spring. The elastic structure 5 is arranged between the brake shoe assembly 4 and the inner side wall of the brake groove 34, and is located on the side of the brake shoe assembly 4 away from the first ear plate 11. In the normal state, the elastic structure 5 pushes the piston body 41 to frictionally cooperate with the brake disc 42 to brake, so as to generate a certain braking force. When it is needed to adjust the braking force or disengage, the compression amount of the elastic structure 5 can be adjusted to achieve the purpose.

[0045] In the embodiment, when no oil is injected into the brake device through the brake oil passage 35, the elastic structure 5 pushes the piston body 41 to frictionally cooperate with the brake disc 42 to brake, so that the rotating body 2 is in a deceleration or braking state. When it is needed to rotate the rotating body 2, brake oil is injected into the brake groove 34 through the brake oil passage 35. The oil pressure pushes the piston body 41 to compress the elastic structure 5 to shrink; at this time, the friction force between the piston body 41 and the brake disc 42 is reduced or no friction force exists, and the rotating body 2 can rotate normally. When the oil supply to the brake oil passage 35 is stopped, the elastic force of the elastic structure 5 pushes the piston body 41 to frictionally cooperate with the brake disc 42 to brake, so that the rotating body 2 is braked, decelerated or stopped. In the present application, the rotating body 2 is in a braking state when no oil is injected, and the rotating body 2 is in a rotating state when oil is injected. This kind of braking method effectively reduces or avoids the problem that the rotating body 2 cannot be decelerated or stopped when no oil can be injected into the rotating body 2.

[0046] It should be noted that the injection of brake oil into the brake cylinder assembly 3 to push the brake shoe assembly 4 to compress the elastic structure 5 through oil pressure in the present application is only one method of implementation. In practice, gas can also be injected into the brake oil passage 35 to compress the elastic structure 5 to shrink through gas pressure, and the principle is similar to the oil injection method, which will not be described here.

[0047] In a specific embodiment, reference is made to Figure 1 , Figure 2 and Figure 3The brake oil path 35 includes an oil inlet 321 and an oil outlet 313. The oil inlet 321 is located on the end face of the brake cylinder assembly 3 close to the elastic structure 5, and the oil outlet 313 is connected to the brake groove 34 and located on the side of the brake groove 34 away from the elastic structure 5. The brake pad assembly 4 is a ring-shaped component coaxial with the second shaft hole 121, including an inner side and an outer side. The inner side is pressed against the rotating body 2, and the outer side is located in the brake groove 34. When the brake needs to be released, brake oil is injected into the oil inlet 321 through an external oil path system. The brake oil enters the brake groove 34 from the oil outlet 313 through the brake oil path 35. The oil pressure pushes the piston body 41 to move away from the first ear plate 11, reducing the extrusion force of the piston body 41 on the rotating body 2, thereby reducing the brake or releasing the brake of the rotating body 2. Conversely, when the oil injection into the oil inlet 321 is stopped, the elastic force of the elastic structure 5 pushes the piston body 42 to extrude the rotating body, reducing the speed or stopping the rotating body 2.

[0048] Further, referring to Figure 2 Fig., Figure 3 and Figure 4 , the brake pad assembly 4 is arranged in the second shaft hole 121. The inner side of the brake disc 42 is fixedly pressed against the rotating body 2, and the outer side of the brake disc 42 cooperates with the inner side of the piston body 41. The outer side of the piston body 41 is located in the brake groove 34, and the brake groove 34 provides a space for the brake pad assembly 4 to move along the axis of the second shaft hole 121. Specifically, the piston body 41 is located in the piston groove 34, the inner side of the brake disc 42 is fixedly pressed against the rotating body 2, and the outer side of the brake disc 42 is located between the side wall of the piston groove 34 and the piston body 41. Under normal circumstances, the elastic structure 5 pushes the piston body 41 to extrude the brake disc 42, and the brake disc 42 is frictionally connected to the brake disc 42, thereby braking the rotating body 2 and achieving the brake effect. When oil is injected into the oil inlet 321, the oil pressure pushes the piston body 41 to move away from the brake disc 42, reducing the extrusion of the piston body 41 on the brake disc 42, and further reducing the friction between the piston body 41 and the brake disc 42, thereby reducing the speed of the rotating body 2 or releasing the brake.

[0049] In a specific embodiment, referring to Figure 1 , Figure 3 and Figure 4The brake cylinder assembly 3 comprises a cylinder body 31, a cylinder cover 32 and a gland 33. The cylinder body 31 is an annular structure coaxial with the second shaft hole 121 and is tightly arranged in the second shaft hole 121. An end surface of the cylinder body 31 is provided with a first oil passage hole 311 for oil passage along the axial direction. An outer circumferential surface of the cylinder body 31 is provided with a second oil passage hole 312, one end of which is communicated with the first oil passage hole 311, and the other end of which is communicated with an oil outlet 313. The oil outlet 313 is located at the side of a brake groove 34 of the cylinder body 31, and is used for discharging brake oil into the brake groove 34.

[0050] The cylinder cover 32 is an annular structure coaxial with the cylinder body 31 and is tightly arranged on the cylinder body 31. An oil inlet 321 is arranged on the cylinder cover 32, which is arranged along the axial direction of the cylinder cover 32 and is communicated with the first oil passage hole 311. The oil inlet 321, the first oil passage hole 311, the second oil passage hole 312 and the oil outlet 313 form a complete brake oil circuit 35. The gland 33 is an annular component, and an outer side of the gland 33 is tightly connected with the cylinder cover 32. The cylinder body 31, the cylinder cover 32 and the gland 33 enclose the brake groove 34 for accommodating the brake pad assembly 4.

[0051] When braking is needed, the piston body 41 tightly abuts on the brake disc 42 under the action of the elastic structure 5, and the rotation of the rotating body 2 is hindered by the friction force. When the braking needs to be released, brake oil can be injected into the oil inlet 321. The brake oil first enters the oil inlet 321 on the cylinder cover 32, and then flows into the brake groove 34 through the first oil passage hole 311, the second oil passage hole 312 and the oil outlet 313 in sequence. Due to the oil pressure, the piston body 41 pushes the elastic structure 5 to contract. The contraction of the elastic structure 5 causes the piston body 41 to not press or reduce the pressing on the brake disc 42, the friction force between the brake disc 42 and the piston body 41 is reduced, and then the rotating body 2 can rotate normally or easily.

[0052] By adjusting the injection amount or pressure of the brake oil, the braking force of the piston body 41 on the rotating body 2 can be accurately controlled. When the braking needs to be restored, the injection of oil needs to be stopped, and the piston body 41 will be pressed on the brake disc 42 under the action of the elastic structure 5, thereby achieving the braking effect on the rotating body 2. The braking device has the characteristics of simple structure and reliable braking, and the accurate control of the braking force is realized through the fine design of the brake cylinder assembly 3. At the same time, due to the design of the brake oil circuit 35 and the brake groove 34, the braking process is more stable and smooth, and the mechanical wear and noise are reduced.

[0053] In a specific embodiment, referring to Figure 3 and Figure 4The brake device further comprises an adjusting pad 6 which is detachably fastened on the cylinder cover 32, and the outer side of the gland 33 is fastened with the adjusting pad 6. Specifically, the gland 33 is fastened with the cylinder cover 32 through the adjusting pad 6, and the elastic structure 5 is located between the piston body 41 and the gland 33, and the elastic structure 5 can extend and contract along the axis of the second shaft hole 121 during the movement of the piston body 41 along the direction of the second shaft hole 121. By changing the thickness of the adjusting pad 6, the space between the piston body 41 and the gland 33 can be reduced, thereby reducing the activity space of the elastic structure 5, and further adjusting the compression amount of the elastic structure 5. By adjusting the compression amount of the elastic structure 5, the braking force of the brake pad assembly 4 on the rotating body 2 can be changed.

[0054] Further, with reference to 3 and Figure 4 A plurality of oil inlet holes 321 and oil outlet holes 313 are arranged on the cylinder body 31 and the cylinder cover 32 correspondingly to form a plurality of brake oil paths 35. Specifically, a plurality of first oil holes 311 are arranged on the circumference of the cylinder body 31, a plurality of second oil holes 312 are arranged on the side surface of the cylinder body 31 and matched with the first oil holes 311, a plurality of oil outlet holes 313 are arranged in the brake grooves 34 and matched with the first oil holes 311, the second oil holes 312 are used to connect the first oil holes 311 and the oil outlet holes 313, and a plurality of oil inlet holes 321 are arranged on the circumference of the cylinder cover 32 and matched with the first oil holes 311. Due to the design of the plurality of oil inlet holes 321 and oil outlet holes 313, the brake oil can flow into and out of the brake grooves 34 more quickly, thereby improving the response speed of braking and unbraking.

[0055] It should be noted that, since the second oil hole 312 is arranged on the side surface of the cylinder body 31, when the brake oil path 35 is in oil communication, in order to ensure that the brake oil moves to the side of the oil outlet hole 313, the oil hole on the side surface of the cylinder body 31 needs to be blocked to avoid the brake oil entering the second oil hole 312 from flowing out of the side surface of the cylinder body 31.

[0056] The brake device of the present application not only has the characteristics of simple structure and reliable braking, but also realizes accurate control and rapid response of the braking force through the design of the brake cylinder assembly 3 and the arrangement of the plurality of brake oil paths 35.

[0057] Further, with reference to Figure 3 and Figure 4The brake disc 42 includes a washer 421 and a brake pad 422. The washer 421 is a ring-shaped component coaxial with the rotating body 2 and is fastened to the rotating body 2. The main function of the washer 421 is to provide the connection between the brake pad 422 and the rotating body 2 and to protect the rotating body 2 from wear during braking. The first friction plate 36 is fixedly arranged on the cylinder body 31, and the second friction plate 43 is fixedly arranged on the piston body 41. The friction plates (including the first friction plate 36 and the second friction plate 43) are ring-shaped components. The main function of the first friction plate 36 and the second friction plate 43 is to provide the required friction force during braking, thereby impeding the rotation of the rotating body 2.

[0058] The brake pad 422 is a ring-shaped or approximately ring-shaped component. The inner side of the brake pad 422 is fastened to the washer 421, and the outer side of the brake pad 422 is arranged between the first friction plate 36 and the second friction plate 43. The material of the brake pad 422 is usually selected from high-friction coefficient materials to ensure the braking effect.

[0059] During operation, the elastic structure 5 pushes the piston body 41 to move towards the brake disc 42, so that the brake pad 422 is tightly attached between the first friction plate 36 and the second friction plate 43, and the friction force is generated between the first friction plate 36, the second friction plate 43 and the brake pad 422, thereby impeding the rotation of the rotating body 2. When it is necessary to release the brake, brake oil is injected into the oil inlet 321, and the brake oil in the brake groove 34 pushes the piston body 41 to compress the elastic structure 5, so that the piston body 41 moves away from the brake pad 422, and the friction force between the brake pad 422 and the friction plate is reduced or eliminated, thereby releasing the brake of the rotating body 2.

[0060] In a specific embodiment, referring to Figure 3 and Figure 4 The cylinder body 31 is coaxial with the second shaft hole 121 and is fastened. The inner side of the cylinder body 31 is provided with a stepped structure, thereby forming a first step surface 314 and a second step surface 315 included in the inner side, and the two step surfaces form cylindrical surfaces with different diameters in the cylinder body 31.

[0061] The first step surface 314 is located away from the rotating body 2, and the outer circumferential side of the piston body 41 is in sealing cooperation with the first step surface 314. The second step surface 315 is located close to the rotating body 2, and the diameter of the second step surface 315 is smaller than that of the first step surface 314. A groove 316 is arranged on the second step surface 315 and surrounds the axis of the cylinder body 31. When brake oil is injected into the brake groove 33, the groove 316 can accommodate brake oil, thereby reducing the flow of brake oil from the second step surface 315 to the brake pad 422.

[0062] The piston body 41 extends a convex ring 411 on the side of the rotating body 2, which is in sealing cooperation with the second step surface 315. The cylinder body 31, the piston body 41 and the convex ring 411 of the piston body 41 of the brake cylinder assembly 3 enclose a sealed space. When the piston body 41 moves in the brake groove 34, the convex ring 411 moves along the second step surface 315 to the axis direction of the second shaft hole 121. The concave groove 316 on the second step surface 315 can reduce the friction area between the convex ring 411 and the second step surface 315. The convex ring 411 closely contacts the second step surface 315, which has the effect of preventing oil leakage and reducing the entry of brake oil from between the convex ring 411 and the second step surface 315 to the brake disc 42.

[0063] The design of the brake device provides a stable mounting position for the brake disc 42, ensuring the stability of the brake disc 42 during braking. In addition, the concave groove 316 on the second step surface 315 reduces the contact area between the brake disc 42 and the convex ring 411, reducing the friction between the convex ring 411 and the second step surface.

[0064] In a specific embodiment, referring to Figure 3 and Figure 4 The piston body 41 is provided with a plurality of elastic holes, which are uniformly arranged along the circumferential direction of the piston body 41. Each elastic hole is an independent cavity for accommodating the elastic structure 5. The elastic structure 5 (such as a spring, an elastic washer, etc.) is installed in each elastic hole and is located between the piston body 41 and the gland 33 when the gland 33 is installed on the cylinder cover 32. The elastic holes provide a mounting position for the elastic structure 5, allowing the elastic structure 5 to work stably.

[0065] The design of the brake device uses the elastic holes on the piston body 41 and the elastic structure 5 to achieve stable support and flexible pushing of the elastic structure 5. The elastic holes are uniformly arranged along the circumferential direction of the piston body 41, ensuring the stability and uniformity of the piston body 41 during movement. At the same time, the use of multiple elastic structures 5 makes the restoring force generated during braking more uniform and stable, improving the braking effect. The elastic structure 5 can be a disc spring.

[0066] The principle of the brake device of the present application is described as follows:

[0067] The brake pad 422 is an annular component, the inner side of the brake pad 422 is fastened to the rotating body 2 or the washer 421, and the outer side of the brake disc 42 is located between the piston body 41 and the cylinder body 31. The contact surface between the brake pad 422 and the friction plate is the braking surface, which is used to generate friction during braking to hinder the rotation of the rotating body 2.

[0068] In normal state, the elastic structure 5 always keeps pushing the piston body 41 to move to the brake pad 422 direction, so that the second friction plate 43 presses the brake pad 422, the brake pad 422 is rubbed with the first friction plate 36 and the second friction plate 43, and the brake force is formed. When the brake is needed to be released, brake oil firstly enters from the oil inlet 321 on the cylinder cover 32, then flows into the cylinder body 31 through the first oil hole 311 and the second oil hole 312, and finally enters into the brake groove 34 from the oil outlet 313, the oil pressure of the brake oil pushes the piston body 41 to press the elastic structure 5 to shrink, so that the friction force between the brake pad 422 and the friction plate is reduced, and the rotating body 2 is allowed to rotate freely, and the brake releasing effect is achieved. When the brake is needed, the brake oil is stopped from being injected into the oil inlet 321 or the brake oil is sucked back from the oil inlet 321 on the cylinder body 31, the oil pressure of the brake oil is lost, the brake pad 422 is tightly attached to the friction plate again under the action of the elastic structure 5, the rotation of the rotating body 2 is hindered through the friction force, and the brake effect is achieved. When the brake is needed to be released again, the above process is repeated to inject the brake oil into the oil inlet 321, so that the rotating body 2 is rotated freely again.

[0069] That is, contrary to the traditional brake mode, in the embodiment, the rotating body 2 is always in the state of braking in normal state. When the brake oil is injected into the brake oil way 35, the rotating body 2 is in the state of brake releasing. The brake device design realizes reliable braking of the rotating body 2 by adopting the brake pad assembly 4 combined with the piston body 41 and the brake pad 422. The free movement of the piston body 41 in the brake groove 34 and the pushing action of the elastic structure 5 make the braking process more stable and reliable.

[0070] The utility model embodiment second aspect provides a swing head, reference Figure 1 、 Figure 4 and Figure 5 , including any kind of brake device, electric spindle above, electric spindle is located between first ear plate 11 and second ear plate 12, and the side of electric spindle is connected with bearing seat set up in first shaft hole 11, and the other side of electric spindle is connected with rotating body 2. Bearing seat is used to support electric spindle and guide its rotation, ensure the stability and precision of electric spindle in the rotation process. Rotating body 2 is also used to support electric spindle, and is matched with brake disc 42 to realize brake function. The two sides of electric spindle 7 are connected with bearing seat and rotating body 2 correspondingly, can rotate on the base 1, and make electric spindle 7 stop by stopping rotating body 2. The swing head design realizes high-precision, high-rigidity and high-speed machining capacity by combining electric spindle with brake device.

[0071] The utility model embodiment third aspect provides a machine tool, including any kind of brake device or swing head above.

[0072] The above merely is preferred implementation manner of the present application, it should be pointed out, for ordinary skilled person in the technical field, on the premise of not departing from the principle of the present application, can also make several improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the present application.

Claims

1. A braking device, characterized by The utility model relates to a brake cylinder assembly and brake disc assembly, including: Base (1), both sides of base (1) correspond to be provided with first lug (11) and second lug (12), first lug (11) and second lug (12) correspond to be provided with the first axle hole (111) and second axle hole (121) of through and coaxial, Rotary body (2) is rotatably arranged in first axle hole (111) and second axle hole (121), Brake cylinder assembly (3) is fixedly arranged in second axle hole (121), brake cylinder assembly (3) is provided with brake groove (34) along inner side wall, Brake pad assembly (4) includes piston body (41) and brake disc (42), piston body (41) is arranged in brake groove (34), brake disc (42) is fixed on rotary body (2), Elastic structure (5) is arranged on one side of piston body (41) along the circumference of piston body (41), and is used for pushing piston body (41) and brake disc (42) to cooperate brake, Wherein, brake cylinder assembly (3) is provided with brake oil circuit (35), brake oil circuit (35) is communicated with brake groove (34), and is used for driving piston body (41) and brake disc (42) to release brake.

2. The brake device according to claim 1, characterized by Brake oil circuit (35) includes oil inlet (321) and oil outlet (313), oil inlet (321) is located on the end face of brake cylinder assembly (3) close to elastic structure (5), and oil outlet (313) is communicated with brake groove (34) and is located on the side of brake groove (34) away from elastic structure (5).

3. The brake device according to claim 2, characterized in that Brake pad assembly (4) is arranged in second axle hole (121), the inner side of brake disc (42) is press-fit fixed on rotary body (2), the outer side of brake disc (42) cooperates with the inner side of piston body (41), the outer side of piston body (41) is located in brake groove (34), and brake groove (34) has the activity space for the activity of piston body (41) along the axial direction of second axle hole (121).

4. The brake device according to claim 2, characterized by Brake cylinder assembly (3) includes: Cylinder body (31) is arranged in second axle hole (121), and oil outlet (313) is arranged on cylinder body (31);Cylinder body (31) is provided with first oil hole (311) along the direction parallel to the axis of cylinder body (31), and is provided with second oil hole (312) along the radial direction, one end of second oil hole (312) is communicated with first oil hole (311), and the other end of second oil hole (312) is communicated with oil outlet (313); Cylinder cover (32) is arranged on cylinder body (31), and oil inlet (321) is arranged on cylinder cover (32) along the direction parallel to the axis of cylinder cover (32), first oil hole (311) is communicated with second oil hole (312) and oil inlet (321). A cover (33) is fastened to the outer side of the cylinder cover (32), and the cylinder body (31), the cylinder cover (32) and the cover (33) enclose the brake groove (34); the elastic structure (5) is located between the piston body (41) and the cover (33).

5. The brake device according to claim 4, characterized in that An adjusting pad (6) is detachably fastened to the cylinder cover (32), and the outer side of the cover (33) is fastened to the adjusting pad (6).

6. The brake device according to claim 5, characterized by A plurality of first oil holes (311) are arranged in the circumferential direction of the cylinder body (31), a plurality of oil outlets (313) are arranged in the brake groove (34) and matched with the plurality of first oil holes (311), and a plurality of second oil holes (312) are arranged in the radial direction of the cylinder body (31) and used to communicate the first oil holes (311) and the oil outlets (313); the cylinder cover (32) is arranged in the circumferential direction and has a plurality of oil inlets (321) matched with the first oil holes (311).

7. The brake device according to any one of claims 4 to 6, characterized in that The brake disc (42) comprises a gasket (421) and a brake pad (422), and the inner side of the brake pad (422) is fastened to the rotating body (2) through the gasket (421). The first friction plate (36) is fixedly arranged on the cylinder body (31), the second friction plate (43) is fixedly arranged on the piston body (41), and the outer side of the brake pad (422) is arranged between the first friction plate (36) and the second friction plate (43).

8. The brake device according to claim 7, characterized in that The inner side of the cylinder body (31) is provided with a first step surface (314) and a second step surface (315), the outer periphery of the piston body (41) is in sealing cooperation with the first step surface (314), and the second step surface (315) is provided with a groove (316) surrounding the axis of the cylinder body (31). The piston body (41) extends a convex ring (411) on one side of the rotating body (2), the convex ring (411) is in sealing cooperation with the second step surface (315), and the cylinder body (31) of the brake cylinder assembly (3), the piston body (41) and the convex ring (411) of the piston body (41) enclose a sealed space; and / or, The piston body (41) is provided with a plurality of elastic holes, and the plurality of elastic holes are arranged in the circumferential direction of the piston body (41), and the elastic structure (5) is arranged in each elastic hole.

9. A swing head characterized in that, The brake device of any one of claims 1-8, an electric spindle (7) is arranged between the first ear plate (11) and the second ear plate (12), and the side of the electric spindle is connected with the rotating body (2).

10. A machine tool, characterized by The brake device of any one of claims 1-8 or the swing head of claim 9.

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