Five-axis rotary table with stacked brake pad structure

Abstract

According to the five-axis rotary table with the stacked brake pad structure, the effect of increasing the brake friction area is achieved through crossed stacking of the rotary brake pads and the static brake pads, and therefore the brake force of the five-axis rotary table is increased; meanwhile, high-pressure gas or liquid is input into the first containing cavity and the second containing cavity, so that the piston assembly moves upwards or downwards, the piston thrust is greatly improved, and the piston is doubly pushed to extrude the rotating brake pad and the static brake pad through the elastic force of an elastic body behind the piston and the thrust generated by pushing the piston through external air pressure or oil pressure; the extrusion friction force borne by the multiple rotary brake pads and the static brake pads is further increased, so that the five-axis rotary table has the quick-response brake performance and provides larger braking force, the whole five-axis machine tool can be self-locked and braked during transportation and power-off maintenance, the safety of equipment and personnel is guaranteed, and the service life of the five-axis machine tool is prolonged. And heavier parts and larger main shaft cutting torque can be borne during production and processing.

Description

Technical Field

[0001] The present invention relates to the technical field of five-axis turntables, and more specifically, to a five-axis turntable with a stacked brake pad structure. Background Art

[0002] The five-axis cradle turntable is a type of CNC machine tool turntable and is a common component for machine tool processing. The workpiece is fixed on the rotating worktable of the five-axis turntable, and the processing requirements are met through the combination of rotation and swing of the five-axis table. There are five driving modes for the five-axis cradle turntable, one is servo motor driven worm gear transmission, the second is servo motor driven harmonic reducer transmission, the third is servo motor driven roller cam reducer transmission, the fourth is servo motor driven gear reducer transmission, and the fifth is driven by motor direct drive; compared with the first four mechanical transmission methods, the motor direct drive method has no mechanical wear in the transmission mechanism and can maintain high precision and high response for a long time, but the direct drive method does not have mechanical friction self-locking force, so an additional brake device needs to be designed. During machine tool manufacturing, transportation, power failure, and locking of the turntable for fixed angle processing, the rotating axis needs to be braked by the brake device to prevent it from rotating.

[0003] The technology closest to the existing one is, publication number: CN117685316A, a two-way piston brake structure, which discloses a cylinder body shell 20 sleeved on the outside of the rotating shaft 10 and a brake pad 30 fixedly connected to the rotating shaft 10, wherein the cylinder body shell 20 is stationary relative to the rotating shaft 10, and a groove 21 is provided at the cylinder body shell 20, and a piston 50 is provided in the groove 21, and the piston 50 divides the groove 21 into a first chamber 23 and a second chamber 22, and the piston 50 is located on one side of the brake pad 30, when pressure is injected into the first chamber 23, the piston 50 moves to the second chamber 22, and at this time the piston 50 disengages from the brake pad 30, and when pressure is injected into the second chamber 22, the piston 50 moves to the first chamber 23, and at this time the piston 50 contacts and presses the brake pad 30.

[0004] The brake structure of the brake device used in the existing five-axis direct-drive turntable is a single-disc brake, which provides relatively small braking force and still cannot provide greater braking force for the rotating shaft under heavy load and high torque conditions.

[0005] In view of this, the present invention proposes a five-axis turntable with a stacked brake pad structure, which has large braking force and simple structure. Summary of the invention

[0006] The purpose of the present invention is to provide a five-axis turntable with a stacked brake pad structure, which has large braking force and simple structure.

[0007] A five-axis turntable with a stacked brake pad structure comprises a brake device 1 and a five-axis turntable 2. The five-axis turntable 2 is provided with a brake device 1, and the brake device 1 is used to provide a braking force for a rotating shaft 11 of the five-axis turntable. The brake device 1 is characterized in that: the brake device 1 comprises a rotating brake pad 3, a stationary brake pad 4, and a piston 8. A bearing is provided between the rotating shaft 11 of the five-axis turntable and a five-axis turntable housing 12. A rotating brake pad 3 is fixedly installed on the rotating shaft 11 of the five-axis turntable. A front cover plate 13 and a cylinder cover plate 14 are provided in sequence at one end of the five-axis turntable housing 12. The stationary brake pad 4 is fixedly installed on the cylinder cover plate 14. The rotating brake pad 3 and the stationary brake pad 4 are arranged in a cavity between the bottom of the front cover plate 13 and the cylinder cover plate 14. There are multiple rotating brake pads 3 and stationary brake pads 4. The rotating brake pad 3 and the stationary brake pad 4 are cross-stacked. One side of the cross-stacked rotating brake pad 3 and the stationary brake pad 4 is provided There is a piston 8, which is used to squeeze the rotating brake pad 3 and the stationary brake pad 4. When the piston 8 moves forward and the gap between the cavity of the stationary front cover plate 13 becomes smaller, the cross-stacked rotating brake pad 3 and the stationary brake pad 4 are squeezed, and the mechanical friction generated by the squeezing forces the rotating brake pad 3 to be unable to rotate, thereby stopping the rotation of the five-axis turntable shaft 11 to achieve the purpose of braking. A first accommodating chamber 6 is formed at one end between the piston 8 and the cylinder cover plate 14, and a second accommodating chamber 7 is formed at the other end between the piston 8 and the five-axis turntable housing 12. The first accommodating chamber 6 is close to one side of the rotating brake pad 3 and the stationary brake pad 4, and the second accommodating chamber 7 is far away from the rotating brake pad 3 and the stationary brake pad 4. High-pressure gas or liquid is input into the first accommodating chamber 6 and the second accommodating chamber 7 to make the piston 8 move upward or downward to squeeze or release the rotating brake pad 3 and the stationary brake pad 4.

[0008] Furthermore, a gasket is provided between the adjacent rotating brake pad 3 and the stationary brake pad 4. The gasket forms a gap between the adjacent surfaces of the rotating brake pad 3 and the stationary brake pad 4. The gasket plays a role in supporting the gap. When the piston 8 does not move upward and does not apply an extrusion force to the rotating brake pad 3 and the stationary brake pad 4, there is a gap between the rotating brake pad 3 and the stationary brake pad 4, and the five-axis turntable shaft 11 can rotate freely.

[0009] Furthermore, the gasket supports a gap between two adjacent end faces of the cross-stacked rotating brake pad 3 and the stationary brake pad 4, and the gap provided is 0.01mm-0.5mm.

[0010] In some embodiments, the rotating brake pad 3 and the stationary brake pad 4 are elastic bodies with axial deformation, displacement and reset capabilities, and the elastic body with axial deformation, displacement and reset capabilities is made of a metal ring shape or a non-metallic synthetic material ring shape.

[0011] Furthermore, the thickness of the rotating brake pad 3 and the stationary brake pad 4 is 0.2 mm-5.0 mm.

[0012] In some embodiments, the contact surface between the rotating brake pad 3 and the stationary brake pad 4 is a smooth surface or a rough surface, and the rough surface is more preferably used to increase the friction between the rotating brake pad 3 and the stationary brake pad 4. The rough surface is processed by one of embossing, sandblasting, thermal spraying of metal particles, and machined notches.

[0013] In some embodiments, a first accommodating chamber 6 is formed between one end of the piston 8 and the cylinder cover plate 14, and a second accommodating chamber 7 is formed between the piston 8 and the five-axis turntable housing 12 at the other end. High-pressure gas or liquid is input into the first accommodating chamber 6 and the second accommodating chamber 7 to make the piston 8 move upward or downward to squeeze or non-extrude the rotating brake pad 3 and the stationary brake pad 4. The piston 8 plays a role in squeezing and releasing the rotating brake pad 3 and the stationary brake pad 4.

[0014] Furthermore, a step is provided at the piston 8 near the end of the rotating brake pad 3 and the stationary brake pad 4, and the step is used to make the rotating brake pad 3 and the stationary brake pad 4 contact and disengage with the five-axis turntable housing 12 faster.

[0015] Furthermore, the piston 8 is an integrally formed structure or a detachable split structure.

[0016] Furthermore, the detachable split structure of the piston 8 includes a piston body and a piston push rod. The piston body is connected to the rotating brake pad 3 and the stationary brake pad 4 through the piston push rod. The movement of the piston body will drive the piston connecting rod to move accordingly.

[0017] Furthermore, sealing rings 15 are respectively provided on the side of the piston body, the cylinder cover plate 14 and the five-axis turntable housing 12, so that the first accommodating cavity 6 and the second accommodating cavity 7 are sealed independent chambers.

[0018] In some embodiments, an elastic member 10 is provided on the side of the piston 8 away from the rotating brake pad 3 and the stationary brake pad 4. The elastic member 10 is an elastomer. When there is no external force, the elastic member 10 releases elastic force to continuously push the piston 8 toward the rotating brake pad 3 and the stationary brake pad 4, so that a normally closed extrusion friction is formed between the rotating brake pad 3 and the stationary brake pad 4 and the front cover plate 13. When the five-axis turntable 2 is not powered on or no high-pressure gas or liquid is input into the first accommodating cavity 6 and the second accommodating cavity 7, the five-axis turntable shaft 11 is in a braked state, and the elastic member 10 and the piston 8 are a detachable split structure or an integrally formed structure.

[0019] Furthermore, the elastic member 10 is one of metal elastomer, polyurethane elastomer, rubber elastomer or a combination thereof. When the elastic member 10 is a metal elastomer, it is a coil spring or a metal spring. When the elastic member 10 is a polyurethane elastomer, it is polyurethane. When the elastic member 10 is a rubber elastomer, it is rubber.

[0020] The beneficial effects of the present invention are as follows: the present invention proposes a five-axis turntable with a stacked brake pad structure, comprising a brake device and a five-axis turntable. The five-axis turntable is provided with a brake device, and the brake device is used to provide a braking force for the rotating shaft of the five-axis turntable. The rotating brake pad and the stationary brake pad are cross-stacked to increase the braking friction area, thereby increasing the braking force of the five-axis turntable. At the same time, high-pressure gas or liquid is input into the first accommodating cavity and the second accommodating cavity to make the piston assembly move upward or downward, which greatly increases the piston thrust. The elastic force of the elastic body behind the piston and the thrust generated by the external air pressure or oil pressure pushing the piston are double-pushed to squeeze the rotating brake pad and the stationary brake pad. The squeezing friction force of the multiple rotating brake pads and the stationary brake pads is further increased, so that the five-axis turntable has a fast-response braking performance and provides a greater braking force, so that the entire five-axis machine tool can be self-locked and braked during transportation and power-off maintenance to ensure the safety of equipment and personnel. It can also carry heavier parts and withstand greater spindle cutting torque during production and processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a five-axis turntable with a stacked brake pad structure according to the present application.

[0022] Figure 2 A side view of a five-axis turntable with a stacked brake pad structure according to the present application.

[0023] Figure 3 A cross-sectional view of a five-axis turntable with a stacked brake pad structure according to the present application.

[0024] Figure 4 It is a partially enlarged cross-sectional view of a brake device of a five-axis turntable with a stacked brake pad structure according to Example 1.

[0025] Figure 5 It is a partially enlarged cross-sectional view of a brake device of a five-axis turntable with a stacked brake pad structure according to Example 2.

[0026] Main component symbols

[0027] Braking device 1, five-axis turntable 2, rotating brake pad 3, stationary brake pad 4, first accommodating cavity 6, second accommodating cavity 7, piston 8, elastic member 10, five-axis turntable shaft 11, five-axis turntable housing 12, front cover plate 13, cylinder cover plate 14, sealing ring 15.

[0028] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0029] The following examples are described to assist the understanding of the present application, and the examples are not and should not be interpreted in any way as limiting the scope of protection of the present application.

[0030] In the following description, those skilled in the art will recognize that throughout this discussion, components may be described as separate functional units (which may include sub-units), but those skilled in the art will recognize that various components or portions thereof may be divided into separate components or may be integrated together (including within a single system or component).

[0031] At the same time, the connections between components or systems are not intended to be limited to direct connections, rather, the data between these components may be modified, reformatted, or otherwise changed by intermediate components. In addition, additional or fewer connections may be used. It should also be noted that the terms "coupled," "connected," or "input" should be understood to include direct connections, indirect connections through one or more intermediate devices, and wireless connections. Embodiment 1:

[0032] like Figure 1 As shown, it is a structural schematic diagram of a five-axis turntable with a stacked brake pad structure of the present application; Figure 2 , which is a side view of a five-axis turntable with a stacked brake pad structure of the present application; Figure 3 As shown, it is a cross-sectional view of a five-axis turntable with a stacked brake pad structure of the present application; Figure 4 1 is a partially enlarged cross-sectional view of a brake device of a five-axis turntable with a stacked brake pad structure according to Example 1.

[0033] A five-axis turntable with a stacked brake pad structure comprises a brake device 1 and a five-axis turntable 2. The five-axis turntable 2 is provided with a brake device 1, and the brake device 1 is used to provide a braking force for a rotating shaft 11 of the five-axis turntable. The brake device 1 is characterized in that: the brake device 1 comprises a rotating brake pad 3, a stationary brake pad 4, and a piston 8. A bearing is provided between the rotating shaft 11 of the five-axis turntable and a five-axis turntable housing 12. A rotating brake pad 3 is fixedly installed on the rotating shaft 11 of the five-axis turntable. A front cover plate 13 and a cylinder cover plate 14 are provided in sequence at one end of the five-axis turntable housing 12. The stationary brake pad 4 is fixedly installed on the cylinder cover plate 14. The rotating brake pad 3 and the stationary brake pad 4 are arranged in a cavity between the bottom of the front cover plate 13 and the cylinder cover plate 14. There are multiple rotating brake pads 3 and stationary brake pads 4. The rotating brake pad 3 and the stationary brake pad 4 are cross-stacked. One side of the cross-stacked rotating brake pad 3 and the stationary brake pad 4 is provided There is a piston 8, which is used to squeeze the rotating brake pad 3 and the stationary brake pad 4. When the piston 8 moves forward and the gap between the cavity of the stationary front cover plate 13 becomes smaller, the cross-stacked rotating brake pad 3 and the stationary brake pad 4 are squeezed, and the mechanical friction generated by the squeezing forces the rotating brake pad 3 to be unable to rotate, thereby stopping the rotation of the five-axis turntable shaft 11 to achieve the purpose of braking. A first accommodating chamber 6 is formed at one end between the piston 8 and the cylinder cover plate 14, and a second accommodating chamber 7 is formed at the other end between the piston 8 and the five-axis turntable housing 12. The first accommodating chamber 6 is close to one side of the rotating brake pad 3 and the stationary brake pad 4, and the second accommodating chamber 7 is far away from the rotating brake pad 3 and the stationary brake pad 4. High-pressure gas or liquid is input into the first accommodating chamber 6 and the second accommodating chamber 7 to make the piston 8 move upward or downward to squeeze or release the rotating brake pad 3 and the stationary brake pad 4.

[0034] Furthermore, a gasket is provided between the adjacent rotating brake pad 3 and the stationary brake pad 4. The gasket forms a gap between the adjacent surfaces of the rotating brake pad 3 and the stationary brake pad 4. The gasket plays a role in supporting the gap. When the piston 8 does not move upward and does not apply an extrusion force to the rotating brake pad 3 and the stationary brake pad 4, there is a gap between the rotating brake pad 3 and the stationary brake pad 4, and the five-axis turntable shaft 11 can rotate freely.

[0035] Furthermore, the gasket supports a gap between two adjacent end faces of the cross-stacked rotating brake pad 3 and the stationary brake pad 4, and the gap provided is 0.01mm-0.5mm.

[0036] In some embodiments, the rotating brake pad 3 and the stationary brake pad 4 are elastic bodies with axial deformation, displacement and reset capabilities, and the elastic body with axial deformation, displacement and reset capabilities is made of a metal ring shape or a non-metallic synthetic material ring shape.

[0037] Furthermore, the thickness of the rotating brake pad 3 and the stationary brake pad 4 is 0.2 mm-5.0 mm.

[0038] In some embodiments, the contact surface between the rotating brake pad 3 and the stationary brake pad 4 is a smooth surface or a rough surface, and the rough surface is more preferably used to increase the friction between the rotating brake pad 3 and the stationary brake pad 4. The rough surface is processed by one of embossing, sandblasting, thermal spraying of metal particles, and machined notches.

[0039] In some embodiments, a first accommodating chamber 6 is formed between one end of the piston 8 and the cylinder cover plate 14, and a second accommodating chamber 7 is formed between the piston 8 and the five-axis turntable housing 12 at the other end. High-pressure gas or liquid is input into the first accommodating chamber 6 and the second accommodating chamber 7 to make the piston 8 move upward or downward to squeeze or non-extrude the rotating brake pad 3 and the stationary brake pad 4. The piston 8 plays a role in squeezing and releasing the rotating brake pad 3 and the stationary brake pad 4.

[0040] Furthermore, a step is provided at the piston 8 near the end of the rotating brake pad 3 and the stationary brake pad 4, and the step is used to make the rotating brake pad 3 and the stationary brake pad 4 contact and disengage with the five-axis turntable housing 12 faster.

[0041] Furthermore, the piston 8 is an integrally formed structure. Embodiment 2:

[0042] like Figure 1 As shown, it is a structural schematic diagram of a five-axis turntable with a stacked brake pad structure of the present application; Figure 2 , which is a side view of a five-axis turntable with a stacked brake pad structure of the present application; Figure 3 As shown, it is a cross-sectional view of a five-axis turntable with a stacked brake pad structure of the present application; Figure 5 The figure is a partially enlarged cross-sectional view of a brake device of a five-axis turntable with a stacked brake pad structure according to Example 2.

[0043] A five-axis turntable with a stacked brake pad structure comprises a brake device 1 and a five-axis turntable 2. The five-axis turntable 2 is provided with a brake device 1, and the brake device 1 is used to provide a braking force for a rotating shaft 11 of the five-axis turntable. The brake device 1 is characterized in that: the brake device 1 comprises a rotating brake pad 3, a stationary brake pad 4, and a piston 8. A bearing is provided between the rotating shaft 11 of the five-axis turntable and a five-axis turntable housing 12. A rotating brake pad 3 is fixedly installed on the rotating shaft 11 of the five-axis turntable. A front cover plate 13 and a cylinder cover plate 14 are provided in sequence at one end of the five-axis turntable housing 12. The stationary brake pad 4 is fixedly installed on the cylinder cover plate 14. The rotating brake pad 3 and the stationary brake pad 4 are arranged in a cavity between the bottom of the front cover plate 13 and the cylinder cover plate 14. There are multiple rotating brake pads 3 and stationary brake pads 4. The rotating brake pad 3 and the stationary brake pad 4 are cross-stacked. One side of the cross-stacked rotating brake pad 3 and the stationary brake pad 4 is provided There is a piston 8, which is used to squeeze the rotating brake pad 3 and the stationary brake pad 4. When the piston 8 moves forward and the gap between the cavity of the stationary front cover plate 13 becomes smaller, the cross-stacked rotating brake pad 3 and the stationary brake pad 4 are squeezed, and the mechanical friction generated by the squeezing forces the rotating brake pad 3 to be unable to rotate, thereby stopping the rotation of the five-axis turntable shaft 11 to achieve the purpose of braking. A first accommodating chamber 6 is formed at one end between the piston 8 and the cylinder cover plate 14, and a second accommodating chamber 7 is formed at the other end between the piston 8 and the five-axis turntable housing 12. The first accommodating chamber 6 is close to one side of the rotating brake pad 3 and the stationary brake pad 4, and the second accommodating chamber 7 is far away from the rotating brake pad 3 and the stationary brake pad 4. High-pressure gas or liquid is input into the first accommodating chamber 6 and the second accommodating chamber 7 to make the piston 8 move upward or downward to squeeze or release the rotating brake pad 3 and the stationary brake pad 4.

[0044] A gasket is also provided between the adjacent rotating brake pad 3 and the stationary brake pad 4. The gasket forms a gap between the adjacent surfaces of the rotating brake pad 3 and the stationary brake pad 4. The gasket plays a role in supporting the gap. When the piston 8 does not move upward and does not apply an extrusion force to the rotating brake pad 3 and the stationary brake pad 4, there is a gap between the rotating brake pad 3 and the stationary brake pad 4, and the five-axis turntable shaft 11 can rotate freely.

[0045] The gasket supports the cross-stacked rotating brake pad 3 and the stationary brake pad 4 to provide a gap between two adjacent end faces, and the gap provided is 0.01mm-0.5mm.

[0046] The rotating brake pad 3 and the stationary brake pad 4 are elastic bodies with axial deformation, displacement and restoration capabilities, and the elastic body with axial deformation, displacement and restoration capabilities is made of a metal ring shape or a non-metallic synthetic material ring shape.

[0047] The thickness of the rotating brake pad 3 and the stationary brake pad 4 is 0.2 mm-5.0 mm.

[0048] The contact surface between the rotating brake pad 3 and the stationary brake pad 4 is a smooth surface or a rough surface, and the rough surface is more preferably used to increase the friction between the rotating brake pad 3 and the stationary brake pad 4. The rough surface is processed by embossing, sandblasting, thermal spraying of metal particles, and machined notches.

[0049] A first accommodating chamber 6 is formed between one end of the piston 8 and the cylinder cover plate 14, and a second accommodating chamber 7 is formed between the piston 8 and the five-axis turntable housing 12 at the other end. High-pressure gas or liquid is input into the first accommodating chamber 6 and the second accommodating chamber 7 to make the piston 8 move upward or downward to squeeze or non-extrude the rotating brake pad 3 and the stationary brake pad 4. The piston 8 plays the role of squeezing and releasing the rotating brake pad 3 and the stationary brake pad 4.

[0050] Furthermore, a step is provided at the piston 8 near the end of the rotating brake pad 3 and the stationary brake pad 4, and the step is used to make the rotating brake pad 3 and the stationary brake pad 4 contact and disengage with the five-axis turntable housing 12 faster.

[0051] Furthermore, the piston 8 is a detachable split structure.

[0052] Furthermore, the detachable split structure of the piston 8 includes a piston body and a piston push rod. The piston body is connected to the rotating brake pad 3 and the stationary brake pad 4 through the piston push rod. The movement of the piston body will drive the piston connecting rod to move accordingly.

[0053] Furthermore, sealing rings 15 are respectively provided on the side of the piston body, the cylinder cover plate 14 and the five-axis turntable housing 12, so that the first accommodating cavity 6 and the second accommodating cavity 7 are sealed independent chambers.

[0054] In some embodiments, an elastic member 10 is provided on the side of the piston 8 away from the rotating brake pad 3 and the stationary brake pad 4. The elastic member 10 is an elastomer. When there is no external force, the elastic member 10 releases elastic force to continuously push the piston 8 toward the rotating brake pad 3 and the stationary brake pad 4, so that a normally closed extrusion friction is formed between the rotating brake pad 3 and the stationary brake pad 4 and the front cover plate 13. When the five-axis turntable 2 is not powered on or no high-pressure gas or liquid is input into the first accommodating cavity 6 and the second accommodating cavity 7, the five-axis turntable shaft 11 is in a braked state, and the elastic member 10 and the piston 8 are a detachable split structure or an integrally formed structure.

[0055] Furthermore, the elastic member 10 is one of metal elastomer, polyurethane elastomer, rubber elastomer or a combination thereof. When the elastic member 10 is a metal elastomer, it is a coil spring or a metal spring. When the elastic member 10 is a polyurethane elastomer, it is polyurethane. When the elastic member 10 is a rubber elastomer, it is rubber.

[0056] Although the present application has disclosed multiple aspects and embodiments, other aspects and embodiments will be obvious to those skilled in the art, and several modifications and improvements may be made without departing from the concept of the present application, all of which belong to the protection scope of the present application. The multiple aspects and embodiments disclosed in the present application are only for illustration and are not intended to limit the present application. The actual protection scope of the present application shall be subject to the claims.

Claims

1. A five-axis turntable with a stacked brake pad structure, comprising a brake device (1) and a five-axis turntable 2, wherein the five-axis turntable 2 is provided with a brake device (1), and the brake device (1) is used to provide a braking force for a rotating shaft (11) of the five-axis turntable, and is characterized in that: The brake device (1) comprises a rotating brake pad (3), a stationary brake pad (4), and a piston (8). A bearing is provided between a rotating shaft (11) of a five-axis turntable and a housing (12) of the five-axis turntable. The rotating brake pad (3) is fixedly mounted on the rotating shaft (11) of the five-axis turntable. A front cover plate (13) and a cylinder cover plate (14) are provided at one end of the housing (12) of the five-axis turntable in sequence. The stationary brake pad (4) is fixedly mounted on the cylinder cover plate (14). The rotating brake pad (3) and the stationary brake pad (4) are arranged in a cavity between the bottom of the front cover plate (13) and the cylinder cover plate (14). There are multiple rotating brake pads (3) and multiple stationary brake pads (4). A piston (8) is provided on one side of the rotating brake pad (3) and the stationary brake pad (4) which are cross-stacked. The piston (8) is used to squeeze the rotating brake pad (3) and the stationary brake pad (4). When the piston (8) ) moves forward and the cavity gap between the stationary front cover plate (13) becomes smaller, the cross-stacked rotating brake pad (3) and the stationary brake pad (4) are squeezed, and the mechanical friction force generated by the squeezing forces the rotating brake pad (3) to be unable to rotate, thereby stopping the rotation of the five-axis turntable shaft (11), thereby achieving the purpose of braking. A first accommodating cavity (6) is formed between one end of the piston (8) and the cylinder cover plate (14), and a second accommodating cavity (7) is formed between the other end of the piston (8) and the five-axis turntable housing (12). The first accommodating cavity (6) is close to the rotating brake pad (3) and the stationary brake pad (4), and the second accommodating cavity (7) is far away from the rotating brake pad (3) and the stationary brake pad (4). High-pressure gas or liquid is input into the first accommodating cavity (6) and the second accommodating cavity (7) so that the piston (8) moves upward or downward to squeeze or release the rotating brake pad (3) and the stationary brake pad (4).

2. The five-axis turntable with a stacked brake pad structure according to claim 1, characterized in that: A gasket is further provided between adjacent rotating brake pads (3) and stationary brake pads (4). The gasket forms a gap between adjacent surfaces of the rotating brake pads (3) and the stationary brake pads (4). The gasket plays a role in supporting the gap. When the piston (8) does not move upward and does not apply a squeezing force to the rotating brake pads (3) and the stationary brake pads (4), a gap exists between the rotating brake pads (3) and the stationary brake pads (4), and the rotating shaft (11) of the five-axis turntable can rotate freely.

3. The five-axis turntable with a stacked brake pad structure as claimed in claim 2, characterized in that: The gasket supports the cross-stacked rotating brake pad (3) and the stationary brake pad (4) to provide a gap between two adjacent end surfaces, wherein the gap provided is 0.01 mm to 0.5 mm.

4. The five-axis turntable with a stacked brake pad structure according to claim 1, characterized in that: The rotating brake pad (3) and the stationary brake pad (4) are elastic bodies with axial deformation, displacement and reset capabilities, and the material of the elastic body with axial deformation, displacement and reset capabilities is one of a metal ring shape or a non-metallic synthetic material ring shape.

5. The five-axis turntable with a stacked brake pad structure according to claim 1, characterized in that: The thickness of the rotating brake pad (3) and the stationary brake pad (4) is 0.2 mm-5.0 mm.

6. The five-axis turntable with a stacked brake pad structure according to claim 1, characterized in that: The contact surface between the rotating brake pad (3) and the stationary brake pad (4) is either a smooth surface or a rough surface.

7. The five-axis turntable with a stacked brake pad structure according to claim 1, characterized in that: A first accommodating chamber (6) is formed between one end of the piston (8) and the cylinder cover plate (14), and a second accommodating chamber (7) is formed between the other end of the piston (8) and the five-axis turntable housing (12). High-pressure gas or liquid is input into the first accommodating chamber (6) and the second accommodating chamber (7) so that the piston (8) moves upward or downward to squeeze or not squeeze the rotating brake pad (3) and the stationary brake pad (4). The piston (8) plays a role in squeezing and releasing the rotating brake pad (3) and the stationary brake pad (4).

8. The five-axis turntable with a stacked brake pad structure as claimed in claim 7, characterized in that: The piston (8) is of a disassembly-type structure or an integrally formed structure.

9. The five-axis turntable with a stacked brake pad structure according to claim 1, characterized in that: An elastic member (10) is also provided on the side of the piston (8) away from the rotating brake pad (3) and the stationary brake pad (4). The elastic member (10) is an elastic body. When no external force is applied, the elastic member (10) releases elastic force to continuously push the piston (8) to move toward the rotating brake pad (3) and the stationary brake pad (4), so that a normally closed extrusion friction is formed between the rotating brake pad (3) and the stationary brake pad (4) and the front cover plate (13). When the five-axis turntable 2 is not powered or high-pressure gas or liquid is not input into the first accommodating cavity (6) and the second accommodating cavity (7), the five-axis turntable shaft (11) is in a braked state. The elastic member (10) and the piston (8) are a detachable split structure or an integrally formed structure.

10. The five-axis turntable with a stacked brake pad structure according to claim 9, characterized in that: The elastic member (10) is one of a metal elastomer, a polyurethane elastomer, and a rubber elastomer, or a combination thereof.

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