Compound index plate

Abstract

This application relates to the field of indexing plates, and more particularly to a composite indexing plate, comprising a base, a spindle, and a braking device. The base surface has a rotating cavity, and the braking device includes a power component and a brake ring. The power component and brake ring in this application are configured such that when the spindle is continuously rotating, it drives the workpiece to rotate around its own axis to achieve turning. When the spindle rotates to a specific angle, it drives the workpiece to be fixed in a specific orientation to achieve precise machining of the workpiece surface. This allows the operator to adjust according to the workpiece machining requirements. The brake ring has an indexing and locking function, enabling locking at any angle of 360°. The brake ring is installed on the outer circumference of the spindle. Under the same frictional force, the braking torque generated by the brake ring is significantly increased, reducing the required locking force and enabling faster deceleration or stopping of the spindle rotation, shortening the braking distance and time, thereby improving the accuracy of workpiece machining or assembly.

Description

Technical Field

[0001] This application relates to the field of indexing plates, and more particularly to a composite indexing plate. Background Technology

[0002] An indexing plate is a machine tool accessory that clamps a workpiece between a chuck or two centers, drives the workpiece to rotate using a transmission mechanism (such as a worm gear pair, end gear plate, or servo motor), and achieves precise angular indexing and positioning through an indexing and positioning mechanism (such as a positioning hole or optical scale). It is widely used in milling machines, drilling machines, surface grinders, and automated equipment. Its core function is to achieve high-precision indexing of workpieces through mechanical or CNC transmission.

[0003] The indexing plate in the existing technology can only drive the workpiece to be processed to rotate to a specific angle for processing, and cannot realize the rotary turning of the workpiece, thus reducing the versatility of the indexing plate. Summary of the Invention

[0004] To improve the versatility of indexing plates, this application provides a composite indexing plate.

[0005] This application provides a composite indexing plate, which adopts the following technical solution: A composite indexing plate includes a base, a main shaft, and a braking device. The base has a rotating cavity on its surface for the main shaft to rotate. The braking device includes a power component and a brake ring. The brake ring is coaxially connected to the outer circumferential surface of the main shaft. The inner wall of the rotating cavity has a brake cavity coaxially formed for the outer ring of the brake ring to be embedded. The power component is connected to the inner wall of the brake cavity. The power component can compress the brake ring, and the driving end of the power component and the inner wall of the brake cavity abut against the two ends of the brake ring in the axial direction to form braking.

[0006] By adopting the above technical solution, the spindle rotates within the rotating cavity. The operator can choose to rotate the spindle at a specific angle or keep it rotating continuously. When the spindle keeps rotating, it drives the workpiece to rotate around its own axis to achieve the turning function. When the spindle rotates at a specific angle, it drives the workpiece to be fixed in a specific orientation to achieve precise machining of the workpiece surface. This allows the operator to adjust according to the workpiece machining requirements, combining the function of the three-jaw chuck with the indexing plate, thereby improving the versatility of the indexing plate. The brake ring has an indexing and locking function, enabling locking at any angle of 360°. At the same time, the brake ring is coaxially connected to the outer circumference of the spindle, increasing the contact area between the brake ring and the spindle, transmitting greater braking force. This is beneficial for applications requiring high braking force or long-term braking, significantly increasing the braking torque generated by the brake ring under the same frictional force, reducing the required locking force, and enabling faster deceleration or stopping of the spindle rotation, shortening the braking distance and time, thereby improving the accuracy of workpiece machining or assembly.

[0007] Optionally, the power assembly includes a power piston and at least two seals. The inner wall of the brake chamber has a power cavity for the power piston to slide in. The sliding direction of the power piston is parallel to the main shaft axis. A pressure regulating gap is left between the outer peripheral surface of the power piston and the inner wall of the power cavity. A pressure regulating hole is opened on the surface of the base, and the pressure regulating hole is connected to the pressure regulating gap. At least two seals are spaced apart on the outer peripheral surface of the power piston. The pressure regulating gap is located between the two seals, and the outer peripheral surface of the power piston and the inner wall of the power cavity clamp the two sides of the seals to form a seal. When air or oil enters the pressure regulating gap through the pressure regulating hole and pushes the power piston closer to the brake ring, the surface of the power piston and the inner wall of the brake cavity clamp the two ends of the brake ring in the axial direction to form braking.

[0008] By adopting the above technical solution, the pressure regulating gap is located between two seals, and the outer circumferential surface of the power piston and the inner wall of the air chamber clamp the two sides of the seals to form a seal, thereby ensuring the stability of the pressure regulating gap seal. When the main shaft needs to be braked, air or oil enters the pressure regulating gap through the pressure regulating hole. The air pressure or oil pressure in the pressure regulating gap pushes the power piston to slide towards the brake ring. The surface of the power piston and the inner wall of the brake chamber clamp the two ends of the brake ring in the axial direction to form a brake, thereby achieving precise braking of the main shaft.

[0009] Optionally, the power assembly further includes a reset elastic element, one end of which is connected to the inner wall of the brake chamber in the direction of elastic force, and the other end of which is connected to the surface of the power piston in the direction of elastic force. The reset elastic element has the tendency to drive the power piston to slide away from the brake ring, and the pressing effect of the power piston on the surface of the brake ring disappears.

[0010] By adopting the above technical solution, when the pressure regulating hole is depressurized, the pressure of the air or oil pressure in the pressure regulating gap on the power piston is reduced. The elastic force of the reset elastic element drives the power piston to slide away from the brake ring. The pressing effect of the power piston on the surface of the brake ring disappears, realizing the automatic reset of the power piston, reducing the wear between the power piston and the brake ring, thereby extending the service life of the indexing plate.

[0011] Optionally, the braking device further includes an adjustment assembly, which includes an adjustment shim, a clamping plate, and an adjustment screw. The adjustment shim, brake ring, and clamping plate are coaxially sleeved on the outer circumferential surface of the brake ring in sequence. The end of the adjustment screw passes through the clamping plate, brake ring, and adjustment shim in sequence and is threaded and fixed to the surface of the brake ring to form a fixed structure. The clamping plate and adjustment shim are respectively pressed against the two ends of the brake ring in the axial direction to form a fixed structure.

[0012] By adopting the above technical solution, when the brake ring needs to be replaced, the adjusting screw is loosened, which eliminates the limiting effect of the clamping plate, brake ring, and clamping plate on the brake ring. The adjusting shim, new brake ring, and clamping plate are then coaxially fitted onto the outer circumference of the brake ring in sequence. The end of the adjusting screw is then threaded through the clamping plate, new brake ring, and adjusting shim in sequence and tightened to fix it to the surface of the brake ring, thus facilitating the replacement of the brake ring. When the brake ring is only thinned, only the thickness of the adjusting shim needs to be replaced to continue using the brake ring, reducing wear on the brake ring and thus reducing the operating cost of the indexing plate.

[0013] Optionally, the base is connected to a clamping assembly, which includes a driven piston, a driving piston, and a clamping plate. The end of the driving piston is connected to the end face of the driving piston facing the brake chamber. The inner wall of the brake chamber has a driving chamber for the driving piston to slide. The inner wall of the brake chamber facing the brake ring has a clamping chamber for the clamping plate to slide. The sliding direction of the clamping plate is parallel to the axis of the main shaft. The end of the driven piston is connected to the end face of the clamping plate facing the clamping chamber. The inner wall of the clamping chamber has a driven chamber for the driven piston to slide. The driven chamber communicates with the driving chamber.

[0014] By adopting the above technical solution, when the thickness of the brake ring in the brake chamber becomes thinner, the contact effect between the inner wall of the brake chamber and the brake ring disappears. The air pressure in the pressure regulating gap continues to push the active piston to slide closer to the brake ring, and at the same time, it drives the active piston to slide on the inner wall of the active chamber. The air in the active chamber enters the driven chamber and pushes the driven piston to slide closer to the pressing chamber, which drives the pressing plate to slide along the inner wall of the pressing chamber towards the brake chamber. The plate surface of the pressing plate protruding from the inner wall of the brake chamber and the surface of the power piston press against the two ends of the brake ring in the axial direction to form braking, thereby ensuring the stability of the main shaft braking.

[0015] Optionally, the clamping assembly further includes a plurality of protrusions one and a plurality of protrusions two, wherein the plurality of protrusions one are spaced apart and connected to the surface of the power piston facing the brake ring, and the plurality of protrusions two are spaced apart and connected to the surface of the clamping plate facing the brake ring, and the protrusions one and protrusions two are arranged alternately.

[0016] By adopting the above technical solution, when the surface of the clamping plate and the surface of the power piston are respectively clamped against the two ends of the brake ring axis to form braking, the first and second protrusions alternately squeeze the surface of the brake ring, so that the contact between the power piston and the brake ring changes from area contact to multi-point contact, forming multiple independent friction units, so that the friction force is evenly applied to the brake ring, avoiding local stress concentration of the brake ring, reducing brake ring wear or deformation, extending service life, and improving braking stability.

[0017] Optionally, the end face of the first protrusion that abuts against the brake ring is provided with a guide surface, which is in the shape of a circular arc protrusion; the end face of the second protrusion that abuts against the brake ring is provided with a guide surface, which is in the shape of a circular arc protrusion.

[0018] By adopting the above technical solution, the magnitude of friction is proportional to the contact area. The arc-shaped contact can increase the contact area, thereby providing a more stable braking force, reducing the fluctuation of braking force caused by poor local contact, and thus further shortening the braking distance.

[0019] Optionally, the inner wall of the rotating cavity is provided with an exhaust channel, which is connected to the pressing cavity.

[0020] By adopting the above technical solution, the exhaust channel connects the rotating cavity and the clamping cavity. When the clamping plate slides towards the brake ring, it drives the air in the rotating cavity to enter the clamping cavity through the exhaust channel. When the clamping plate slides away from the brake ring, it drives the air in the clamping cavity to enter the rotating cavity through the exhaust channel, thus promoting the air flow in the rotating cavity and enabling the air in the rotating cavity to fully contact the spindle and exchange heat, thereby improving the heat dissipation efficiency of the spindle.

[0021] Optionally, the base is connected to a chip removal assembly, which includes a one-way valve and a two-way valve. A chip removal channel is formed on the outer circumferential surface of the base, which is connected to an exhaust channel. The one-way valve is connected to the inner wall of the exhaust channel, allowing air from the rotating chamber to enter the exhaust channel. The one-way valve is connected to the inner wall of the chip removal channel, allowing air from the chip removal channel to impact the surface of the base.

[0022] By adopting the above technical solution, when the clamping plate slides towards the brake ring, the air pressure in the clamping chamber decreases, and the air in the rotating chamber enters the clamping chamber through the one-way valve and the exhaust channel. When the clamping plate slides away from the brake ring, the air pressure in the clamping chamber increases, and the air in the rotating chamber passes through the chip discharge channel and the one-way valve and impacts the base surface, making it difficult for fine chips generated during workpiece processing to accumulate on the base surface, thus achieving directional cleaning of fine chips on the base surface.

[0023] Optionally, the base includes a mounting part, a sealing part, and a rotating part. The rotating part is rotatably connected to the surface of the sealing part, and the end face of the sealing part facing away from the rotating part is connected to the surface of the mounting part. The rotating cavity is located between the rotating part, the sealing part, and the mounting part. The braking cavity is located between the sealing part and the mounting part. The chip discharge channel is located between the sealing part and the mounting part, and the opening of the chip discharge channel away from the exhaust channel is located on the surface of the sealing part facing the rotating part. The chip discharge assembly also includes a sealing tube, which is connected to the surface of the sealing part facing the mounting part. The end of the sealing tube can be embedded in the chip discharge channel on the mounting part, and the outer peripheral surface of the sealing tube abuts against the inner wall of the chip discharge channel to form a seal.

[0024] By adopting the above technical solution, the mounting part, sealing part, and rotating part are assembled in sequence to form a base, realizing the detachable installation of the base, which facilitates the cleaning and maintenance of the indexing plate; at the same time, the end of the sealing tube is embedded in the chip discharge channel on the mounting part, and the outer circumference of the sealing tube abuts against the inner wall of the chip discharge channel to form a seal, thereby improving the stability of airflow in the chip discharge channel; and the cavity of the chip discharge channel away from the exhaust channel is located on the surface of the sealing part facing the rotating part, so that fine chips on the surface of the rotating part are not easy to accumulate at the abutment of the sealing part and the rotating part, thereby further extending the service life of the indexing plate.

[0025] In summary, this application includes at least one of the following beneficial technical effects: The power assembly and brake ring are designed so that when the spindle is constantly rotating, it drives the workpiece to rotate around its own axis to achieve the turning function. When the spindle rotates to a specific angle, it drives the workpiece to be fixed in a specific orientation to achieve precise machining of the workpiece surface. This allows the operator to adjust according to the workpiece machining requirements. The brake ring has an indexing and locking function, which can achieve locking at any angle of 360°. The brake ring is installed on the outer circumference of the spindle. Under the same frictional force, the braking torque generated by the brake ring is significantly increased, and the required locking force is reduced. This allows for faster deceleration or stopping of the spindle rotation, shortening the braking distance and time, thereby improving the accuracy of workpiece machining or assembly. The arrangement of the power piston and seals, with the surface of the power piston and the inner wall of the brake chamber clamping the two ends of the brake ring along the axial direction to form a brake, achieves precise braking of the main shaft; The reset elastic element enables automatic reset of the power piston, reducing wear between the power piston and the brake ring, thereby extending the service life of the indexing plate. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application.

[0027] Figure 2 This is a cross-sectional view of the base in an embodiment of this application.

[0028] Figure 3 yes Figure 2 The enlarged view at point A mainly shows the braking device.

[0029] Explanation of reference numerals in the attached drawings: 1. Base; 11. Mounting part; 111. Rotating cavity; 112. Braking cavity; 113. Active cavity; 114. Clamping cavity; 115. Driven cavity; 116. Exhaust passage; 117. Chip removal section two; 118. Chip removal passage; 12. Sealing part; 121. Power cavity; 122. Pressure regulating gap; 123. Chip removal section one; 13. Rotating part; 2. Main shaft; 3. Braking device; 31. Power assembly; 311. Power piston; 3 12. Sealing element; 313. Reset elastic element; 32. Brake ring; 34. Adjusting assembly; 341. Adjusting shim; 342. Pressure plate; 343. Adjusting screw; 4. Indexing table; 5. Clamping assembly; 51. Driving piston; 52. Driven piston; 53. Clamping plate; 54. Protrusion 1; 541. Guide surface 1; 55. Protrusion 2; 551. Guide surface 2; 6. Chip removal assembly; 61. Check valve 1; 62. Check valve 2; 63. Sealing tube. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0031] This application discloses a composite indexing dial. (Refer to...) Figure 1 and Figure 2 The composite indexing plate includes a base 1, a spindle 2, a braking device 3, and an indexing table 4. The base 1 includes a mounting part 11, a sealing part 12, and a rotating part 13. The bottom of the mounting part 11 is for machine tool mounting. The end face of the sealing part 12 is coaxially fixed to the top surface of the mounting part 11 by bolts. The rotating part 13 is coaxially rotatably connected to the end face of the sealing part 12 facing away from the mounting part 11. The surface of the mounting part 11 facing the sealing part 12 has a coaxially formed rotating cavity 111 for the spindle 2 to rotate. The rotating cavity 111 passes through the sealing part 12 and the rotating part 13 along its own axis. The rotating part 13 is fixed to the end face of the spindle 2 by bolts. The indexing table 4 is coaxially fixed to the rotating part 13 facing away from the sealing part 11 by a quick-release and quick-install structure. The surface of the sealing part 12 and the indexing table 4 integrate multiple processing stations. The indexing table 4 achieves rapid switching between processes by rotating the workpiece, thereby reducing the number of times the workpiece needs to be clamped. At the same time, the operator can choose to rotate the spindle 2 at a specific angle inside the rotating cavity 111 or keep it rotating continuously. When the spindle 2 keeps rotating, the spindle 2 drives the workpiece to rotate around its own axis to achieve the turning function. When the spindle 2 rotates at a specific angle, the spindle 2 drives the workpiece to be fixed in a specific orientation to achieve precise machining of the workpiece surface. This allows the operator to adjust according to the workpiece processing requirements, combining the function of the three-jaw chuck with the indexing table, thereby improving the versatility of the indexing table.

[0032] Reference Figure 2 and Figure 3 The braking device 3 includes a power assembly 31, a brake ring 32, and an adjustment assembly 34. The brake ring 32 is detachably fixed to the outer circumference of the main shaft 2 via the adjustment assembly 34. The brake ring 32 has an indexing locking function, enabling locking at any angle of 360°. A brake cavity 112 is coaxially formed on the inner wall of the rotating cavity 111 for the outer ring of the brake ring 32 to be embedded. The brake cavity 112 is located between the sealing part 12 and the mounting part 11. The adjustment assembly 34 includes an adjusting shim 341, a clamping plate 342, and adjusting screws 343. In this embodiment, the adjusting shim 341 and the clamping plate 342 are both rings. The number of adjusting screws 343 can be one, two, or more. In this embodiment, the number of adjusting screws 343 is... Multiple adjusting shims 341, brake ring 32, and clamping shims 342 are coaxially sleeved on the outer circumference of brake ring 32. The end of adjusting screw 343 passes through clamping shims 342, brake ring 32, and adjusting shims 341 in sequence and is threaded and fixed to the surface of brake ring 32 to form a fixed structure. Multiple adjusting screws 343 are evenly distributed around the axis of main shaft 2, and the surface of brake ring 32 abuts against the inner wall of mounting part 11 facing brake cavity 112. The operator can select the thickness of adjusting shims 341 according to the thickness of brake ring 32 to ensure the stability of the bottom surface of brake ring 32 abutting against the inner wall of mounting part 11 facing brake cavity 112, thereby reducing the number of times brake ring 32 needs to be replaced and reducing the cost of using the indexing plate.

[0033] Reference Figure 2 and Figure 3 The power assembly 31 is installed on the inner wall of the sealing part 12 facing the brake chamber 112. The power assembly 31 can compress the brake ring 32 to deform, and the driving end of the power assembly 31 and the inner wall of the mounting part 11 facing the brake chamber 112 are respectively pressed against the two ends of the brake ring 32 in the axial direction to form braking. The power assembly 31 includes a power piston 311, a reset elastic element 313 and two seals 312. The seals 312 can be sealing rings and Glyd rings. In this embodiment, the seals 312 are Glyd rings. The material of the power piston 311 can be rubber or silicone. In this embodiment, the power piston 311 is rubber, which has a certain deformation capacity, and the power piston 311 is a ring.

[0034] Reference Figure 2 and Figure 3The sealing part 12 has a power chamber 121 on the inner wall facing the brake chamber 112 for the power piston 311 to slide. The sliding direction of the power piston 311 is parallel to the axis of the main shaft 2. A pressure regulating gap 122 is left between the outer peripheral surface of the power piston 311 and the inner wall of the power chamber 121. A pressure regulating hole is provided on the outer peripheral surface of the sealing part 12. A gas gun or oil pump can inject high-pressure gas or oil into the pressure regulating gap 122 through the pressure regulating hole. Two sealing elements 312 are coaxially sleeved on the outer peripheral surface of the power piston 311 at intervals. The pressure regulating gap 122 is located between the two sealing elements 312. The outer peripheral surface of the power piston 311 and the inner wall of the power chamber 121 clamp the inner and outer rings of the sealing elements 312 one by one to form a seal, thereby realizing stable pressure increase and decrease in the pressure regulating gap 122.

[0035] Reference Figure 2 and Figure 3 The reset elastic element 313 can be a compression spring or a tension spring. In this embodiment, the reset elastic element 313 is a compression spring with a certain deformation capability. One end of the reset elastic element 313 in the elastic direction is connected to the inner wall of the mounting part 11 facing the brake chamber 112, and the other end of the reset elastic element 313 in the elastic direction is connected to the surface of the power piston 311. The reset elastic element 313 has the elastic force to drive the power piston 311 to slide away from the brake ring 32, and the pressing effect of the power piston 311 on the surface of the brake ring 32 tends to disappear.

[0036] Reference Figure 2 and Figure 3 The number of reset elastic elements 313 can be one, two, or more. In this embodiment, the number of reset elastic elements 313 is multiple, and the multiple reset elastic elements 313 are evenly distributed around the axis of the main shaft 2. When the air gun fills the pressure regulating gap 122 through the pressure regulating hole, the air pressure in the pressure regulating gap 122 increases and pushes the power piston 311 to slide towards the brake ring 32. The surface of the power piston 311 and the mounting part 11 clamp the two sides of the brake ring 32 in the axial direction of the brake chamber 112 one by one to form braking. The brake ring 32 is coaxially connected to the outer circumferential surface of the main shaft 2, which increases the contact area between the brake ring 32 and the main shaft 2, and transmits greater braking force, which is beneficial for applications requiring high braking force or long braking time. The application scenario of intermittent braking; and the brake ring 32 is installed on the outer circumferential surface of the main shaft 2. Under the same frictional force, the braking torque generated by the brake ring 32 is significantly increased, the required locking force is reduced, and the main shaft 2 can be decelerated or stopped more quickly, shortening the braking distance and time, thereby improving the accuracy of workpiece processing or assembly; when the air gun is depressurized, the air pressure in the pressure regulating gap 122 decreases, and the elastic force of the reset elastic element 313 drives the power piston 311 to slide away from the brake ring 32. The pressing effect of the power piston 311 on the surface of the brake ring 32 disappears, realizing the automatic reset of the power piston 311, reducing the wear between the power piston 311 and the brake ring 32, thereby extending the service life of the indexing plate.

[0037] Reference Figure 2 and Figure 3 The mounting part 11 is equipped with a clamping assembly 5, which can compress the surface of the brake ring 32 to form a brake. The clamping assembly 5 includes an active piston 51, a driven piston 52, a clamping plate 53, multiple protrusions 54 and multiple protrusions 55. The active piston 51 and the driven piston 52 can be made of rubber or silicone. In this embodiment, the active piston 51 and the driven piston 52 are both made of rubber, which has a certain deformation capacity. The end of the active piston 51 is fixed to the inner wall of the power piston 311 facing the mounting part 11 and the brake chamber 112. The mounting part 11 has an active cavity 113 on the inner wall facing the brake cavity 112 for the active piston 51 to slide. The mounting part 11 has a pressing cavity 114 on the inner wall facing the brake cavity 112 for the pressing plate 53 to slide. In this embodiment, the pressing plate 53 is equivalent to a piston. The sliding direction of the pressing plate 53 is parallel to the axis of the main shaft 2. The end of the driven piston 52 is fixed to the end face of the pressing plate 53 facing the pressing cavity 114. The inner wall of the pressing cavity 114 has a driven cavity 115 for the driven piston 52 to slide. The driven cavity 115 is connected to the active cavity 113.

[0038] Reference Figure 2 and Figure 3 Multiple protrusions 54 are fixed at intervals on the surface of the power piston 311 facing the brake ring 32. The end face of the protrusion 54 that abuts against the brake ring 32 is provided with a guide surface 541, which is arc-shaped and raised. Multiple protrusions 55 are fixed at intervals on the surface of the clamping plate 53 facing the brake ring 32. The protrusions 55 and protrusions 54 are staggered. The end face of the protrusion 55 that abuts against the brake ring 32 is provided with a guide surface 551, which is arc-shaped and raised.

[0039] Reference Figure 2 and Figure 3When the power piston 311 slides along the inner wall of the power chamber 121 toward the brake ring 32, and the end face of the power piston 311 abuts against the surface of the brake ring 32, the surface of the clamping plate 53 is flush with the inner wall of the mounting part 11 toward the brake chamber 112; when the thickness of the brake ring 32 in the brake chamber 112 is reduced by the pressure of the surface of the mounting part 11 and the surface of the power piston 311, the air pressure in the pressure regulating gap 122 continues to push the active piston 51 toward the brake ring 32, and at the same time drives the active piston 51 to slide along the inner wall of the active chamber 113. The air in the active chamber 113 enters the driven chamber 115 and pushes the driven piston 52 toward the clamping chamber 114, causing... The movable clamping plate 53 slides along the inner wall of the clamping cavity 114 toward the brake cavity 112. The plate surface of the clamping plate 53 protruding from the inner wall of the brake cavity 112 and the surface of the power piston 311 press against both ends of the brake ring 32 in the axial direction to form a brake, thereby ensuring the stability of braking the main shaft 2. At the same time, the first protrusion 54 and the second protrusion 55 alternately press the surface of the brake ring 32, so that the contact between the power piston 311 and the brake ring 32 changes from area contact to multi-arc surface contact, forming multiple independent friction units, increasing the contact area with the brake ring 32, so that the friction force is evenly applied to the brake ring 32, avoiding local stress concentration in the brake ring 32, reducing uneven wear or deformation of the brake ring 32, and extending its service life.

[0040] Reference Figure 2 and Figure 3 The rotating cavity 111 has an exhaust channel 116 on the inner wall of the mounting part 11, which connects to the pressing cavity 114. A chip removal assembly 6 is installed between the sealing part 12 and the mounting part 11. The chip removal assembly 6 can push the air in the rotating cavity 111 out from the pressing part between the sealing part 12 and the rotating part 13. The chip removal assembly 6 includes a one-way valve 61, a two-way valve 62 and a sealing pipe 63. A chip removal section 123 is opened on the surface of the sealing part 12 facing the rotating part 13. The chip removal section 123 penetrates the surface of the sealing part 12 in a direction close to the mounting part 11. The end face of the mounting part 11 facing the chip removal section 123 A second chip removal section 117 is provided, which connects to the first chip removal section 123 and the exhaust channel 116. The first chip removal section 123 and the second chip removal section 117 are spliced ​​together to form a chip removal channel 118. The sealing tube 63 can be made of rubber or silicone. In this embodiment, the sealing tube 63 is made of rubber, which has a certain deformation capability. The sealing tube 63 is fixed on the end face of the rotating part 13 facing the mounting part 11. The end of the sealing tube 63 can be embedded in the second chip removal section 117. The outer circumferential surface of the sealing tube 63 abuts against the inner wall of the second chip removal section 117 to form a seal, and the inner cavity of the sealing tube 63 connects the second chip removal section 117 and the first chip removal section 123.

[0041] Reference Figure 2 and Figure 3One-way valve 61 is installed on the inner wall of the exhaust channel 116, allowing air from the rotating chamber 111 to enter the exhaust channel 116. One-way valve 62 is installed on the inner wall of the chip removal section 123, allowing air from the chip removal section 123 to impact the surface of the sealing part 12. When the clamping plate 53 slides towards the brake ring 32, the air pressure in the clamping chamber 114 decreases, and the air in the rotating chamber 111 enters the clamping chamber 114 through the one-way valve 61 and the exhaust channel 116, pushing the air flow in the clamping chamber 114. The air fully contacts the spindle 2 and exchanges heat. This improves the cooling efficiency of the spindle 2. When the clamping plate 53 slides away from the brake ring 32, the air pressure in the clamping cavity 114 increases. The air in the rotating cavity 111 passes through the chip removal section 2 117, the inner cavity of the sealing tube 63, the chip removal section 123, and the one-way valve 2 62 and impacts the surface of the sealing part 12 facing the rotating part 13. This makes it difficult for the fine chips generated by the workpiece to accumulate on the end face where the sealing part 12 and the rotating part 13 are rotatably connected, reducing the wear of the fine chips on the rotating part 13 and the sealing part 12, and realizing the directional cleaning of the fine chips on the surface of the sealing part 12, thereby extending the service life of the indexing plate.

[0042] The implementation principle of a composite indexing plate in this application embodiment is as follows: When the air gun injects air into the pressure regulating gap 122 through the pressure regulating hole, the air pressure in the pressure regulating gap 122 increases and pushes the power piston 311 to slide towards the brake ring 32. The surface of the power piston 311 and the mounting part 11 clamp the two sides of the brake ring 32 in the axial direction of the brake chamber 112 respectively to form braking. The contact area between the brake ring 32 and the main shaft 2 increases, and a greater braking force is transmitted, which is beneficial to application scenarios that require high braking force or long-term braking. Moreover, the brake ring 32 is installed on the outer peripheral surface of the main shaft 2. Under the same friction force, the braking torque generated by the brake ring 32 is significantly increased, which can decelerate or stop the rotation of the main shaft 2 more quickly, shorten the braking distance and time, thereby improving the accuracy of workpiece processing or assembly.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A compound index plate, characterized by: The utility model provides a brake device, including base (1), main shaft (2) and brake device (3), the surface of base (1) is equipped with the rotation cavity (111) of main shaft (2) rotation, brake device (3) includes power assembly (31) and brake ring (32), brake ring (32) coaxially connected in the outer circumferential surface of main shaft (2), the inner wall of rotation cavity (111) is coaxially equipped with brake cavity (112) for the embedding of brake ring (32) outer ring, power assembly (31) is connected in the inner wall of brake cavity (112), power assembly (31) can extrude brake ring (32) deformation, and power assembly (31) drive end and brake cavity (112) inner wall are tightly close to the both ends of brake ring (32) axis direction and form brake.

2. The compound index plate of claim 1, wherein: The power assembly (31) includes a power piston (311) and at least two sealing members (312), the inner wall of the brake cavity (112) is provided with a power cavity (121) for sliding of the power piston (311), the sliding direction of the power piston (311) and the axis of the main shaft (2) are parallel to each other, the outer circumferential surface of the power piston (311) and the inner wall of the power cavity (121) leave a pressure regulating gap (122), the surface of the base (1) is provided with a pressure regulating hole, the pressure regulating hole communicates with the pressure regulating gap (122), the at least two sealing members (312) are spaced apart and arranged on the outer circumferential surface of the power piston (311), the pressure regulating gap (122) is located between the two sealing members (312), and the outer circumferential surface of the power piston (311) and the inner wall of the power cavity (121) clamp the sealing members (312) on both sides to form a seal, when air or oil enters the pressure regulating gap (122) through the pressure regulating hole and pushes the power piston (311) close to the brake ring (32), the surface of the power piston (311) and the inner wall of the brake cavity (112) clamp the both ends of the brake ring (32) in the axial direction to form brake.

3. The compound index plate of claim 2, wherein: The power assembly (31) further includes a reset elastic member (313), one end of the reset elastic member (313) in the elastic force direction is connected to the inner wall of the brake cavity (112), the other end of the reset elastic member (313) in the elastic force direction is connected to the surface of the power piston (311), the reset elastic member (313) has an elastic force to drive the power piston (311) to slide away from the brake ring (32), and the power piston (311) disappears the tendency of the tight effect on the surface of the brake ring (32).

4. The compound index plate of claim 3 wherein: The brake device (3) further includes an adjusting assembly (34), the adjusting assembly (34) includes an adjusting washer (341), a pressing piece (342) and an adjusting screw (343), the adjusting washer (341), the brake ring (32) and the pressing piece (342) are coaxially arranged on the outer circumferential surface of the brake ring (32) in sequence, the end of the adjusting screw (343) is sequentially arranged through the pressing piece (342), the brake ring (32) and the adjusting washer (341) and is threadedly fastened and fixed on the surface of the brake ring (32) to form a fixed, and the pressing piece (342) and the adjusting washer (341) correspondingly tightly close to the both ends of the brake ring (32) in the axial direction to form a fixed.

5. The compound index plate of claim 3 wherein: The base (1) is connected to a clamping assembly (5), which includes a driven piston (52), a driving piston (51), and a clamping plate (53). The end of the driving piston (51) is connected to the end face of the power piston (311) facing the brake chamber (112). The inner wall of the brake chamber (112) is provided with a driving chamber (113) for the driving piston (51) to slide. The inner wall of the brake chamber (112) facing the brake ring (32) is provided with a clamping chamber (114) for the clamping plate (53) to slide. The sliding direction of the clamping plate (53) is parallel to the axis of the main shaft (2). The end of the driven piston (52) is connected to the end face of the clamping plate (53) facing the clamping chamber (114). The inner wall of the clamping chamber (114) is provided with a driven chamber (115) for the driven piston (52) to slide. The driven chamber (115) is connected to the driving chamber (113).

6. The compound index plate of claim 5 wherein: The clamping assembly (5) further includes a plurality of first protrusions (54) and a plurality of second protrusions (55). The plurality of first protrusions (54) are spaced apart and connected to the surface of the power piston (311) facing the brake ring (32). The plurality of second protrusions (55) are spaced apart and connected to the surface of the clamping plate (53) facing the brake ring (32). The first protrusions (54) and second protrusions (55) are arranged alternately.

7. The compound index plate of claim 6 wherein: The end face of the first protrusion (54) that abuts against the brake ring (32) is provided with a guide surface (541), which is in the shape of a circular arc protrusion. The end face of the second protrusion (55) that abuts against the brake ring (32) is provided with a guide surface (551), which is in the shape of a circular arc protrusion.

8. The compound index plate of claim 5 wherein: The inner wall of the rotating cavity (111) is provided with an exhaust channel (116), which is connected to the pressing cavity (114).

9. The compound index plate of claim 8 wherein: The base (1) is connected to a chip removal assembly (6), which includes a one-way valve (61) and a one-way valve (62). A chip removal channel (118) is provided on the outer circumferential surface of the base (1), which is connected to an exhaust channel (116). The one-way valve (61) is connected to the inner wall of the exhaust channel (116). The one-way valve (61) allows air in the rotating chamber (111) to enter the exhaust channel (116). The one-way valve (62) is connected to the inner wall of the chip removal channel (118), which allows air in the chip removal channel (118) to impact the surface of the base (1).

10. The compound index plate of claim 9, wherein: The base (1) includes a mounting part (11), a sealing part (12), and a rotating part (13). The rotating part (13) is rotatably connected to the surface of the sealing part (12). The end face of the sealing part (12) facing away from the rotating part (13) is connected to the surface of the mounting part (11). The rotating cavity (111) is located between the rotating part (13), the sealing part (12), and the mounting part (11). The brake cavity (112) is located between the sealing part (12) and the mounting part (11). The chip discharge channel (118) is located in the sealing part (12). The chip removal assembly (6) is located between the sealing part (12) and the mounting part (13), and the opening of the chip removal channel (118) away from the exhaust channel (116) is located on the surface of the sealing part (12) facing the rotating part (13). The chip removal assembly (6) also includes a sealing tube (63), which is connected to the surface of the sealing part (12) facing the mounting part (11). The end of the sealing tube (63) can be embedded in the chip removal channel (118) on the mounting part (11), and the outer peripheral surface of the sealing tube (63) abuts against the inner wall of the chip removal channel (118) to form a seal.

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