Ultra-thin double chuck high-speed spindle spring clamping built-in hydraulic loosening mechanism

Abstract

The application relates to a built-in hydraulic loosening mechanism of a super-thin double-chuck high-speed spindle spring clamping device. The device solves the technical problems of large space occupation and short service life of the existing spindle. The device comprises a cylindrical spindle seat, a spindle body with coaxially connected left and right half shafts is rotatably arranged on the circumferential inner side of the spindle seat through a bearing mounting structure, a chuck mounting assembly for mounting a chuck body is movably arranged on the circumferential inner side of the spindle body, a claw disc body connected with the chuck mounting assembly is movably arranged on the circumferential outer side of the end of the right half shaft close to the left half shaft, the claw disc body is provided with a spring clamping driving mechanism on one side, and a hydraulic loosening driving mechanism capable of driving the claw disc body to move against the action force of the spring clamping driving mechanism and towards the left half shaft is arranged on the outer side of the claw disc body. The device has the advantages that the spring clamping driving mechanism can reduce the space occupation of the equipment, reduce the cost, ensure the clamping effect, and prevent heating during the rotary clamping process, thereby prolonging the service life of the parts.

Description

Technical Field

[0001] This invention belongs to the field of spindle equipment technology, specifically relating to an ultra-thin double-clamp high-speed spindle spring clamping built-in hydraulic release mechanism. Background Technology

[0002] In existing technologies, hydraulic cylinders and transmission components of hydraulic spindles generally adopt an external mounting structure, resulting in a large overall spindle size, excessive radial footprint, and extremely low structural integration. As precision machining equipment rapidly develops towards compactness, miniaturization, and integration, internal installation space is becoming increasingly limited. This external structure cannot adapt to confined installation conditions, severely restricting its applicability and failing to meet the assembly and usage requirements of small precision machining equipment. Furthermore, existing spindle clamping methods mostly employ pneumatic or conventional hydraulic clamping. During the continuous high-speed rotation and frequent clamping and releasing of the spindle, these clamping structures continuously generate frictional heat and hydraulic / pneumatic heat. Localized heat accumulation on the spindle can cause thermal deformation, further deviating from spindle rotation accuracy and exacerbating machining errors. Simultaneously, the high-temperature environment accelerates the aging and wear of seals and transmission components, shortening the overall service life of the clamping mechanism and the spindle. Summary of the Invention

[0003] The purpose of this invention is to address the above-mentioned problems by providing an ultra-thin dual-clamp high-speed spindle spring clamping mechanism with built-in hydraulic release mechanism.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an ultra-thin double-clamp high-speed spindle spring clamping built-in hydraulic release mechanism, comprising a cylindrical spindle seat, a spindle body with a left half-shaft and a right half-shaft coaxially connected and rotatably mounted on the inner circumferential side of the spindle seat via a bearing mounting structure, a chuck mounting assembly for mounting a chuck body is axially movable on the inner circumferential side of the spindle body, and a claw disc body connected to the chuck mounting assembly is circumferentially movably sleeved on the outer circumferential side of the right half-shaft near the left half-shaft, and a spring clamping drive mechanism is provided on one side of the claw disc body to move the claw disc body away from the left half-shaft, and a mechanism for driving the claw disc body to overcome the spring clamping mechanism is provided on the outer side of the claw disc body. The hydraulic release drive mechanism, which applies force to the spring clamping drive mechanism and moves towards the left half-axis, is mounted in the spindle seat via a bearing mounting structure for easy rotation of the spindle body. The chuck mounting assembly facilitates the mounting of the chuck body within the spindle body. The jaw disc and spring clamping drive mechanism drive the chuck mounting assembly and chuck body to clamp the workpiece, ensuring effective clamping. The spring clamping method prevents heat generation during rotation, extending the equipment's lifespan. The hydraulic release drive mechanism displaces the jaw disc and spring clamping drive mechanism, thereby releasing the workpiece from the chuck mounting assembly and chuck body, ensuring efficient clamping and release of the workpiece.

[0005] In the aforementioned ultra-thin dual-clamp high-speed spindle spring clamping built-in hydraulic release mechanism, the right half-shaft has a small cylindrical body and a large cylindrical body coaxially integrated. The end of the small cylindrical body away from the large cylindrical body is connected to the left half-shaft. The claw disc body is slidably sleeved on the outer circumference of the small cylindrical body. The outer circumference of the small cylindrical body has several inwardly recessed and axially extended guide grooves, and the inner circumference of the claw disc body has several claw disc sliding parts axially slidably disposed in the guide grooves. The guide grooves can guide the claw disc sliding parts, ensuring the clamping efficiency and release efficiency of the claw disc body driving the chuck mounting assembly. The small cylindrical body facilitates the sliding of the claw disc body on the right half-shaft, and the outer circumference of the large cylindrical body is a bearing mounting structure that can support the right half-shaft and ensure rotational stability.

[0006] In the aforementioned ultra-thin double-clamp high-speed spindle spring clamping built-in hydraulic release mechanism, one end of the small cylindrical body extends to an annular mounting step on the inner side of one end of the left half-shaft and is fixedly connected to the annular mounting step by a number of spindle connecting bolts that axially penetrate the small cylindrical body. The annular mounting step has an annular limiting step on the outer side of the circumference, located on the inner side of the end face of the left half-shaft and corresponding to one end of the claw plate. The end of the claw plate sliding part away from the left half-shaft has a sliding column that axially moves through the end face of the small cylindrical body and extends into the large cylindrical body. The annular mounting step facilitates the quick mounting of the right half-shaft against the annular mounting step through the small cylindrical body, improving the connection efficiency between the right and left half-shafts. The sliding column facilitates the connection between the claw plate sliding part and the chuck mounting assembly, allowing the claw plate sliding part to drive the chuck mounting assembly to slide.

[0007] In the aforementioned ultra-thin double-clamp high-speed spindle spring clamping built-in hydraulic release mechanism, the spring clamping drive mechanism includes several spring clamping drive components circumferentially distributed between the inner side of the left half-shaft near the right half-shaft and the outer side of the small cylindrical body. One end of each spring clamping drive component acts on the left half-shaft and the other end acts on one side of the jaw disc body. Through the spring clamping drive component, the jaw disc body can be elastically moved towards the right half-shaft, thereby driving the chuck mounting component and the chuck body to clamp the workpiece, ensuring the clamping effect.

[0008] In the aforementioned ultra-thin dual-clamp high-speed spindle spring clamping built-in hydraulic release mechanism, the spring clamping drive assembly includes several spring mounting holes circumferentially arranged within an annular mounting step and extending axially along the large cylindrical body. Each spring mounting hole corresponds to and communicates with a guide groove. The bottom of each spring mounting hole has a first guide post positioning groove, and one side of the claw disc has a second guide post positioning groove corresponding to the first guide post positioning groove. A spring guide post, sequentially passing through the spring mounting hole and the guide groove, is provided between the first and second guide post positioning grooves. A butterfly spring assembly is fitted onto the spring guide post. One end of the butterfly spring assembly acts on the bottom of the spring mounting hole, and the other end acts on one side of the claw disc body. The spring mounting hole facilitates the installation of the butterfly spring assembly, and the first guide post positioning groove and the second guide post positioning groove facilitate the guiding installation of the spring guide post. The butterfly spring assembly can push the claw disc body to move towards the right half-axis direction within the spring mounting hole to clamp the workpiece. Clamping with the butterfly spring assembly reduces the number of parts, reduces equipment costs, and reduces the space occupied by the equipment. Furthermore, it does not generate heat during clamping and rotation, thus improving the service life of the parts.

[0009] In the aforementioned ultra-thin double-clamp high-speed spindle spring clamping built-in hydraulic release mechanism, the hydraulic release drive mechanism includes a cylinder liner body disposed on the inner circumferential side of the spindle seat and sleeved on the outer circumferential side of the right half-shaft. An end cap spacer is fixedly provided at one end of the cylinder liner body near the left half-shaft. The inner circumferential side of the cylinder liner body has a hydraulic chamber, and a piston body sleeved on the outer circumferential side of the right half-shaft is axially slidably disposed within the hydraulic chamber. The inner circumferential side of the piston body has an annular pushing step that abuts against the outer side of the claw disc body. The outer circumferential side of the spindle seat has a hydraulic inlet hole, which is connected to a hydraulic inlet channel that radially penetrates the cylinder liner body and communicates with the hydraulic chamber. One end of the hydraulic inlet channel extends to the side of the piston body away from the left half-shaft. The outer circumferential side of the end cap spacer has a hydraulic outlet hole, which is connected to a hydraulic outlet hole that radially penetrates the end cap spacer and communicates with the hydraulic chamber. The hydraulic chambers are connected by a hydraulic oil outlet channel, with one end of the hydraulic oil outlet channel extending to the side of the piston body near the left half-axis. Piston position sensing components are provided on both sides of the piston body. An annular pushing step facilitates the displacement of the piston body by the jaw disc during clamping. Hydraulic oil flows into the hydraulic chamber through the hydraulic inlet hole and hydraulic oil outlet channel. The hydraulic oil in the hydraulic chamber pushes the piston body towards the left half-axis, and the annular pushing step also pushes the jaw disc towards the left half-axis. The disc spring assembly compresses, and the chuck mounting assembly moves the chuck body to release the workpiece. When workpiece clamping is required, the hydraulic oil in the hydraulic chamber is discharged through the hydraulic oil outlet channel and hydraulic oil outlet hole. The piston position sensing components detect the clamping and releasing states, ensuring effective clamping and releasing.

[0010] In the aforementioned ultra-thin double-clamp high-speed spindle spring clamping built-in hydraulic release mechanism, the piston position sensing component includes a first piston movement gap disposed between the inner circumferential side of the cylinder liner and the outer circumferential side of the large cylindrical body, allowing one end of the piston body to pass through. A first piston position proximity switch is radially inserted through the outer circumferential side of the spindle seat, penetrating the cylinder liner and extending to the first piston movement gap. A second piston movement gap is provided on the inner circumferential side of the end cap spacer, allowing the other end of the piston body to pass through. A second piston position proximity switch is radially inserted through the outer circumferential side of the end cap spacer, penetrating the end cap spacer and extending to the second piston movement gap. The first piston movement gap and the first piston position proximity switch can detect the piston body clamping position, ensuring the clamping effect on the workpiece. The second piston movement gap and the second piston position proximity switch can detect the piston body release position, ensuring the release clamping effect on the workpiece.

[0011] In the aforementioned ultra-thin dual-clamp high-speed spindle spring clamping built-in hydraulic release mechanism, the bearing mounting structure includes a left bearing assembly disposed between the inner circumferential side of one end of the spindle seat and the outer circumferential side of the left half-shaft away from the right half-shaft. A right bearing assembly is disposed between the inner circumferential side of the other end of the spindle seat and the outer circumferential side of the right half-shaft away from the left half-shaft. The chuck body and the hydraulic release drive mechanism are located between the left and right bearing assemblies. The left bearing assembly includes components disposed between the inner circumferential side of one end of the spindle seat and the outer circumferential side of the left half-shaft away from the right half-shaft. The left angular contact bearing is located between the outer sides. One end face of the spindle housing has a left bearing cap, and the inner side of the left bearing cap has a left bearing waterproof disc connected to the left half-shaft. The outer side of the spindle housing has several left bearing lubrication oil vents and a left bearing temperature sensor extending to the outer side of the left angular contact bearing. The right bearing assembly includes a right angular contact bearing located between the inner side of the spindle housing away from the left bearing assembly and the outer side of the large cylindrical body. The end face of the spindle housing away from the left bearing assembly has a right bearing cap, and the right... The bearing cap has a right bearing waterproof disc connected to the right half-shaft on its outer side. The main shaft seat has several right bearing lubrication oil vents and a right bearing temperature sensor extending to the outside of the right angular contact bearing. The left bearing assembly supports the left half-shaft, and the right bearing assembly supports the right half-shaft, ensuring the rotational stability and accuracy of both the left and right half-shafts. The left bearing cap and left bearing waterproof disc provide a sealing protection for the left angular contact bearing, improving its service life. The left bearing lubrication oil vents supply oil and gas to the left angular contact bearing, further extending its service life. The left bearing temperature sensor detects the temperature of the left angular contact bearing. Similarly, the right bearing cap and right bearing waterproof disc provide a sealing protection for the right angular contact bearing, improving its service life. The right bearing lubrication oil vents supply oil and gas to the right angular contact bearing, further extending its service life. The right bearing temperature sensor also detects the temperature of the right angular contact bearing.

[0012] In the aforementioned ultra-thin double-clamp high-speed spindle spring clamping built-in hydraulic release mechanism, the chuck mounting assembly includes a right conical disc disposed on the inner circumferential side of the right half-shaft and connected to a sliding column by several fixing bolts. The inner circumferential side of the right conical disc has a right conical surface, and the inner circumferential side of the left half-shaft has a left conical portion integrally connected to the left half-shaft. A pull tube is provided between the left conical portion and the right conical disc. The inner circumferential side of the left conical portion has a left conical surface symmetrically arranged with the right conical surface. Both ends of the pull tube are respectively provided with chuck fixing grooves for positioning the chucks. Clamps such as rubber chucks are fixed in the chuck fixing grooves. The right conical disc can move with the chuck body through the sliding column. It can abut against the chuck body through the right and left conical surfaces. The displacement of the right conical disc can drive the chuck body to clamp or release the workpiece. The double-head clamping can improve the clamping efficiency, ensure the clamping effect on the workpiece, and ensure clamping accuracy.

[0013] In the aforementioned ultra-thin double-clamp high-speed spindle spring clamping built-in hydraulic release mechanism, the left half-shaft has a spindle synchronous pulley circumferentially outward at the end near the right half-shaft, and the outer side of the spindle seat has a synchronous belt connection notch corresponding to the spindle synchronous pulley. The outer side of the left bearing waterproof disc has a magnetic ring encoder circumferentially outward, and the left bearing cover has an encoder reading head extending to the outer side of the magnetic ring encoder. The outer side of the left bearing cover has an encoder waterproof cover connected to the left bearing waterproof disc. The synchronous belt connection notch facilitates the driving of the spindle synchronous pulley, and the rotational speed of the spindle synchronous pulley can be detected through the magnetic ring encoder and the encoder reading head. The encoder waterproof cover provides protection for the magnetic ring encoder and improves its service life.

[0014] Compared with existing technologies, the advantages of this invention are:

[0015] 1. The workpiece is clamped by a spring clamping drive mechanism, which can reduce the space occupied by the equipment and reduce costs, ensure the clamping effect, and prevent heat generation during the rotation clamping process, thus improving the service life of the parts.

[0016] 2. The hydraulic release drive mechanism can easily drive the spring clamping drive mechanism to release and hold the workpiece, ensuring the workpiece release and holding effect;

[0017] 3. The piston position sensing component can detect the release and clamping positions of the piston body, ensuring effective clamping and release. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0020] Figure 3 This is a structural cross-sectional view of the present invention;

[0021] Figure 4 This is an exploded view of the main shaft structure in this invention;

[0022] Figure 5 This is a cross-sectional view of the structure of the present invention in its released state;

[0023] Figure 6 This is a cross-sectional view of the structure of the present invention in the clamped state.

[0024] In the diagram: 1. Spindle seat; 11. Synchronous belt connection notch; 2. Bearing mounting structure; 21. Left bearing assembly; 21. Left angular contact bearing; 211. Left bearing cap; 212. Left bearing waterproof disc; 213. Left bearing lubricating oil vent; 214. Left bearing temperature sensor; 215. Right bearing assembly; 22. Right angular contact bearing; 221. Right bearing cap; 222. Right bearing waterproof disc; 223. Right bearing lubricating oil vent; 224. Right bearing temperature sensor; 225. Spindle body; 3. Left half-shaft; 31. Annular mounting step; 311. Annular limiting step; 312. Right half-shaft; 32. Small cylindrical body; 321. Large cylindrical body; 322. Guide groove; 323. Chuck mounting assembly; 4. Right conical disc; 41. Right conical surface; 42. Left conical part; 43. Pull tube; 44. Left conical surface; 45. Claw disc body; 5. Claw disc. Sliding part 51, sliding column 52, spring clamping drive mechanism 6, spring clamping drive assembly 61, spring mounting hole 611, first guide column positioning groove 612, second guide column positioning groove 613, spring guide column 614, butterfly spring assembly 615, hydraulic release drive mechanism 7, cylinder liner body 71, end cover spacer 72, hydraulic chamber 73, piston body 74, annular push step 75, hydraulic oil inlet hole 76, hydraulic oil inlet channel 77, hydraulic oil outlet hole 78, hydraulic oil outlet channel 79, piston position sensing assembly 8, first piston movement clearance 81, first piston position proximity switch 82, second piston movement clearance 83, second piston position proximity switch 84, main shaft synchronous pulley 9, magnetic ring encoder 10, encoder reading head 101, encoder waterproof cover 102. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1 , Figure 3 , Figure 4As shown, an ultra-thin double-clamp high-speed spindle spring clamping with built-in hydraulic release mechanism includes a cylindrical spindle seat 1. A spindle body 3, coaxially connected to a left half-shaft 31 and a right half-shaft 32, is rotatably mounted on the inner side of the spindle seat 1 via a bearing mounting structure 2. A chuck mounting assembly 4 for mounting chuck bodies is axially movable on the inner side of the spindle body 3. A chuck disc 5, connected to the chuck mounting assembly 4, is circumferentially movably sleeved on the end of the right half-shaft 32 near the left half-shaft 31. A spring clamping drive mechanism 6 is provided on one side of the chuck disc 5, enabling it to move away from the left half-shaft 31. A mechanism on the outer side of the chuck disc 5 drives it to overcome the force of the spring clamping drive mechanism 6 and move away from the left half-shaft 31. The hydraulic release drive mechanism 7, which moves in the direction of the left half-shaft 31, is mounted in the spindle seat 1 for easy rotation of the main spindle body 3 via the bearing mounting structure 2. The chuck mounting assembly 4 facilitates the installation of the chuck body in the main spindle body 3. The jaw disc body 5 and the spring clamping drive mechanism 6 can drive the chuck mounting assembly 4 and the chuck body to clamp the workpiece, ensuring the clamping effect. The spring clamping method does not generate heat during rotation, improving the service life of the equipment. The hydraulic release drive mechanism 7 can drive the jaw disc body 5 and the spring clamping drive mechanism 6 to move, thereby driving the chuck mounting assembly 4 and the chuck body to release the workpiece, ensuring the efficiency of clamping and releasing the workpiece.

[0027] Specifically, the right half-shaft 32 has a small cylindrical body 321 and a large cylindrical body 322 coaxially integrated. The end of the small cylindrical body 321 away from the large cylindrical body 322 is connected to the left half-shaft 31. The claw disc body 5 is slidably sleeved on the outer side of the small cylindrical body 321. The outer side of the small cylindrical body 321 has several inwardly recessed and axially extended guide grooves 323, and the inner side of the claw disc body 5 has several claw disc sliding parts 51 axially slidably disposed in the guide grooves 323. The guide grooves 323 can guide the claw disc sliding parts 51, ensuring the clamping efficiency and loosening efficiency of the claw disc body 5 driving the chuck mounting assembly 4. The small cylindrical body 321 facilitates the sliding of the claw disc body 5 on the right half-shaft 32, and the outer side of the large cylindrical body 322 is a bearing mounting structure 2 that can support the right half-shaft 32 and ensure rotational stability.

[0028] The small cylindrical body 321 extends one end to the annular mounting step 311 on the inner side of the left half-shaft 31 and is fixedly connected to the annular mounting step 311 by a number of main shaft connecting bolts that axially penetrate the small cylindrical body 321. The annular mounting step 311 has an annular limiting step 312 on the inner side of the end face of the left half-shaft 31 and corresponding to one end of the claw plate body 5. The end of the claw plate sliding part 51 away from the left half-shaft 31 has a sliding column 52 that axially moves through the end face of the small cylindrical body 321 and extends into the large cylindrical body 322. The annular mounting step 311 facilitates the right half-shaft 32 to be quickly abutted against the annular mounting step 311 through the small cylindrical body 321, improving the connection efficiency between the right half-shaft 32 and the left half-shaft 31. The sliding column 52 facilitates the connection between the claw plate sliding part 51 and the chuck mounting assembly 4, allowing the claw plate sliding part 51 to drive the chuck mounting assembly 4 to slide.

[0029] like Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the spring clamping drive mechanism 6 includes several spring clamping drive assemblies 61 circumferentially distributed between the inner side of the left half-shaft 31 near the right half-shaft 32 and the outer side of the small cylindrical body 321. One end of the spring clamping drive assembly 61 acts on the left half-shaft 31 and the other end acts on one side of the jaw disc body 5. The spring clamping drive assembly 61 can elastically drive the jaw disc body 5 to move towards the right half-shaft 32, thereby driving the chuck mounting assembly 4 and the chuck body to clamp the workpiece and ensure the clamping effect.

[0030] Furthermore, the spring clamping drive assembly 61 includes a plurality of spring mounting holes 611 circumferentially disposed within the annular mounting step 311 and extending axially along the large cylindrical body 322. Each spring mounting hole 611 corresponds to and communicates with a guide groove 323. The bottom of each spring mounting hole 611 has a first guide post positioning groove 612, and one side of the claw disc 5 has a second guide post positioning groove 613 corresponding to the first guide post positioning groove 612. A spring guide post 614 is sequentially inserted into the spring mounting hole 611 and the guide groove 323 between the first guide post positioning groove 612 and the second guide post positioning groove 613. A butterfly spring assembly 615 is fitted onto each spring guide post 614. One end of the butterfly spring assembly 615 acts on the bottom of the spring mounting hole 611 and the other end acts on one side of the claw disc body 5. The spring mounting hole 611 facilitates the installation of the butterfly spring assembly 615, and the first guide post positioning groove 612 and the second guide post positioning groove 613 facilitate the guidance and installation of the spring guide post 614. The butterfly spring assembly 615 can push the claw disc body 5 to move towards the right half-axis 32 within the spring mounting hole 611 to clamp the workpiece. Clamping with the butterfly spring assembly 615 reduces the number of parts, reduces equipment costs, and reduces the space occupied by the equipment. Furthermore, it does not generate heat during the clamping rotation process, thus improving the service life of the parts.

[0031] The hydraulic release drive mechanism 7 includes a cylinder liner 71 disposed circumferentially inward of the main shaft seat 1 and sleeved circumferentially outward of the right half-shaft 32. An end cap spacer 72 is fixedly provided at one end of the cylinder liner 71 near the left half-shaft 31. The cylinder liner 71 has a hydraulic chamber 73 circumferentially inward, and a piston 74 sleeved circumferentially outward of the right half-shaft 32 is axially slidably disposed within the hydraulic chamber 73. The piston 74 has an annular pushing step 75 circumferentially inward that abuts against the outer side of the claw disc body 5. The main spindle seat has a hydraulic inlet hole 76 extending outward around its circumference. The hydraulic inlet hole 76 is connected to a hydraulic inlet channel 77 that radially penetrates the cylinder liner body 71 and communicates with the hydraulic chamber 73. One end of the hydraulic inlet channel 77 extends to the side of the piston body 74 away from the left half-shaft 31. The end cover spacer 72 has a hydraulic outlet hole 78 extending outward around its circumference. The hydraulic outlet hole 78 is connected to a hydraulic outlet channel 79 that radially penetrates the end cover spacer 72 and communicates with the hydraulic chamber 73. One end of the hydraulic oil outlet channel 79 extends to the side of the piston body 74 near the left half-shaft 31. The piston body 74 is provided with piston position sensing components 8 on both sides. The annular push step 75 facilitates the displacement of the piston body 74 by the claw plate body 5 during the clamping process. The hydraulic oil inlet hole 76 and the hydraulic oil inlet channel 77 facilitate the flow of hydraulic oil into the hydraulic chamber 73. The hydraulic oil in the hydraulic chamber 73 pushes the piston body 74 to move towards the left half-shaft 31, and the annular push step 75 can push the claw plate body 5 to move towards the left half-shaft 31. The disc spring assembly 615 is compressed and the chuck mounting assembly 4 drives the chuck body to move and release the workpiece. When it is necessary to clamp the workpiece, the hydraulic oil in the hydraulic chamber 73 can be discharged through the hydraulic oil outlet channel 79 and the hydraulic oil outlet hole 78. The piston position sensing component 8 can detect the clamping and releasing states to ensure the clamping and releasing effects.

[0032] Combination Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, the piston position sensing assembly 8 includes a first piston movement gap 81 disposed between the inner side of the cylinder liner body 71 and the outer side of the large cylindrical body 322, through which one end of the piston body 74 passes. A first piston position proximity switch 82 is radially inserted through the outer side of the spindle seat 1, passing through the cylinder liner body 71 and extending to the first piston movement gap 81. A second piston movement gap 83 is provided on the inner side of the end cap spacer 72, through which the other end of the piston body 74 passes. A second piston position proximity switch 84 is radially inserted through the outer side of the end cap spacer 72, passing through the end cap spacer 72 and extending to the second piston movement gap 83. The clamping position of the piston body 74 can be detected through the first piston movement gap 81 and the first piston position proximity switch 82 to ensure the clamping effect on the workpiece. The loosening position of the piston body 74 can be detected through the second piston movement gap 83 and the second piston position proximity switch 84 to ensure the loosening clamping effect on the workpiece.

[0033] The bearing mounting structure 2 includes a left bearing assembly 21 disposed between the inner circumferential side of one end of the spindle seat 1 and the outer circumferential side of the left half-shaft 31 away from the right half-shaft 32. A right bearing assembly 22 is disposed between the inner circumferential side of the other end of the spindle seat 1 and the outer circumferential side of the right half-shaft 32 away from the left half-shaft 31. The claw disc body 5 and the hydraulic release drive mechanism 7 are located between the left bearing assembly 21 and the right bearing assembly 22. The left bearing assembly 21 includes a left angular contact bearing 211 disposed between the inner circumferential side of one end of the spindle seat 1 and the outer circumferential side of the left half-shaft 31 away from the right half-shaft 32. A left bearing cap 212 is provided on one end face of the spindle seat 1. Furthermore, the left bearing cap 212 is provided with a left bearing waterproof disc 213 connected to the left half-shaft 31 on its inner circumferential side, and the spindle seat 1 is provided with a plurality of left bearing lubricating oil vents 214 and a left bearing temperature sensor 215 extending to the outside of the left angular contact bearing 211 on its outer circumferential side; the right bearing assembly 22 includes a right angular contact bearing 221 disposed between the inner circumferential side of the end of the spindle seat 1 away from the left bearing assembly 21 and the outer circumferential side of the large cylindrical body 322, the end face of the spindle seat 1 away from the left bearing assembly 21 is provided with a right bearing cap 222, and the outer side of the right bearing cap 222 is provided with a right bearing waterproof disc 223 connected to the right half-shaft 32, the spindle seat 1 The circumferential outer side is provided with several right bearing lubrication oil vents 224 and a right bearing temperature sensor 225 extending to the outer side of the right angular contact bearing 221. The left half-shaft 31 is supported by the left bearing assembly 21, and the right half-shaft 32 is supported by the right bearing assembly 22, ensuring the rotational stability and accuracy of the left and right half-shafts 31 and 32. The left bearing cap 212 and the left bearing waterproof disc 213 ensure the sealing and protection of the left angular contact bearing 211, improving the service life of the left angular contact bearing 211. The left bearing lubrication oil vents 214 allow the left angular contact bearing 211 to be supplied with lubrication oil. Oil and air are supplied for lubrication, further improving the service life of the left angular contact bearing 211. The temperature of the left angular contact bearing 211 can be detected by the left bearing temperature sensor 215. The right bearing cover 222 and the right bearing waterproof plate 223 can ensure the sealing and protection of the right angular contact bearing 221, improving the service life of the right angular contact bearing 221. Furthermore, oil and air can be supplied to the right angular contact bearing 221 for lubrication through the right bearing lubrication oil and air hole 224, further improving the service life of the right angular contact bearing 221. The temperature of the right angular contact bearing 221 can be detected by the right bearing temperature sensor 225.

[0034] Specifically, the chuck mounting assembly 4 includes a right conical disc 41 located circumferentially inward of the right half-shaft 32 and connected to the sliding column 52 by several fixing bolts. The right conical disc 41 has a right conical surface 42 circumferentially inward. The left half-shaft 31 has a left conical part 43 integrated with the left half-shaft 31 circumferentially inward. A pull tube 44 is provided between the left conical part 43 and the right conical disc 41. The left conical part 43 has a left conical surface 45 symmetrically arranged with the right conical surface 42 circumferentially inward. Both ends of the pull tube 44 have chuck fixing grooves for positioning the chuck. The chuck fixing grooves fix rubber chucks and other chucks. The right conical disc 41 can move with the jaw disc body 5 via the sliding column 52. It can abut against the chuck body via the right conical surface 42 and the left conical surface 45. The movement of the right conical disc 41 can drive the chuck body to clamp or release the workpiece. The double-head clamping can improve the clamping efficiency, ensure the clamping effect on the workpiece, and ensure the clamping accuracy.

[0035] Combination Figure 1 , Figure 2 As shown, the left half-shaft 31 has a main shaft synchronous pulley 9 on its outer circumference near the right half-shaft 32, and the outer side of the main shaft seat 1 has a synchronous belt connection notch 11 corresponding to the main shaft synchronous pulley 9. The left bearing waterproof disc 213 has a magnetic ring encoder 10 on its outer circumference, and the left bearing cover 212 has an encoder reading head 101 extending to the outer side of the magnetic ring encoder 10. The outer side of the left bearing cover 212 has an encoder waterproof cover 102 connected to the left bearing waterproof disc 213. The synchronous belt connection notch 11 facilitates the driving of the main shaft synchronous pulley 9, and the rotational speed of the main shaft synchronous pulley 9 can be detected by the magnetic ring encoder 10 and the encoder reading head 101. The encoder waterproof cover 102 can protect the magnetic ring encoder 10 and improve its service life.

[0036] The principle of this embodiment is as follows: the spindle seat 1 supports the left half-shaft 31 and the right half-shaft 32 respectively through the bearing mounting structure 2, ensuring the rotational accuracy of the left half-shaft 31 and the right half-shaft 32. The jaw disc body 5 and the chuck mounting assembly 4 can drive the chuck body to clamp and release the workpiece. The spring clamping drive mechanism 6 can clamp and drive the jaw disc body 5, ensuring the clamping effect on the workpiece. Moreover, the spring clamping drive mechanism 6 has a simple structure, low cost, and does not generate heat during rotational clamping, thus improving the service life of the parts. The hydraulic release drive mechanism 7 can push the jaw disc 5 to move towards the left half shaft 31, thereby driving the chuck mounting assembly 4 and the chuck body to release and clamp the workpiece. At this time, the disc spring assembly 615 is in a compressed state. When the hydraulic oil in the hydraulic chamber 73 is discharged, the disc spring assembly 615 can immediately clamp the workpiece to ensure clamping efficiency. The piston position sensing assembly 8 can detect the release and clamping position of the piston body 74 to ensure the clamping and release effect.

[0037] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0038] Although this paper extensively uses the following components: spindle seat 1, timing belt connection notch 11, bearing mounting structure 2, left bearing assembly 21, left angular contact bearing 211, left bearing cap 212, left bearing waterproof disc 213, left bearing lubricating oil vent 214, left bearing temperature sensor 215, right bearing assembly 22, right angular contact bearing 221, right bearing cap 222, right bearing waterproof disc 223, right bearing lubricating oil vent 224, right bearing temperature sensor 225, spindle body 3, left half-shaft 31, annular mounting step 311, annular limiting step 312, right half-shaft 32, small cylindrical body 321, large cylindrical body 322, guide groove 323, chuck mounting assembly 4, right conical disc 41, right conical surface 42, left conical part 43, pull tube 44, left conical surface 45, claw disc body 5, claw disc sliding part 51, etc. The terms used include sliding column 52, spring clamping drive mechanism 6, spring clamping drive assembly 61, spring mounting hole 611, first guide column positioning groove 612, second guide column positioning groove 613, spring guide column 614, butterfly spring assembly 615, hydraulic release drive mechanism 7, cylinder liner body 71, end cover spacer 72, hydraulic chamber 73, piston body 74, annular push step 75, hydraulic oil inlet hole 76, hydraulic oil inlet channel 77, hydraulic oil outlet hole 78, hydraulic oil outlet channel 79, piston position sensing assembly 8, first piston movement clearance 81, first piston position proximity switch 82, second piston movement clearance 83, second piston position proximity switch 84, main shaft synchronous pulley 9, magnetic ring encoder 10, encoder reading head 101, encoder waterproof cover 102, etc., but the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A thin-type double-clamp high-speed spindle spring clamping built-in hydraulic release mechanism, comprising a cylindrical spindle seat (1), characterized in that, The spindle seat (1) is rotatably provided with a spindle body (3) having a left half shaft (31) and a right half shaft (32) coaxially connected via a bearing mounting structure (2) on the inner side of the spindle body (1). The spindle body (3) is axially movable on the inner side of the spindle body for mounting a chuck body. The right half shaft (32) is rotatably sleeved on the outer side of the left half shaft (31) with a claw disc body (5) connected to the chuck mounting assembly (4). The claw disc body (5) is provided on one side with a spring clamping drive mechanism (6) that can move the claw disc body (5) away from the left half shaft (31). The claw disc body (5) is provided on the outer side with a hydraulic release drive mechanism (7) that can drive the claw disc body (5) to overcome the force of the spring clamping drive mechanism (6) and move towards the left half shaft (31).

2. The ultra-thin double-clamp high-speed spindle spring clamping built-in hydraulic release mechanism according to claim 1, characterized in that, The right half-shaft (32) has a small cylindrical body (321) and a large cylindrical body (322) that are coaxially integrated. The end of the small cylindrical body (321) away from the large cylindrical body (322) is connected to the left half-shaft (31). The claw disc body (5) is slidably sleeved on the outer side of the small cylindrical body (321). The outer side of the small cylindrical body (321) has several inwardly recessed and axially extended guide grooves (323), and the inner side of the claw disc body (5) has several claw disc sliding parts (51) that are axially slidably disposed in the guide grooves (323).

3. The ultra-thin double-clamp high-speed spindle spring clamping built-in hydraulic release mechanism according to claim 2, characterized in that, One end of the small cylindrical body (321) extends to the annular mounting step (311) on the inner side of one end of the left half shaft (31) and is fixedly connected to the annular mounting step (311) by a number of main shaft connecting bolts that axially penetrate the small cylindrical body (321). The annular mounting step (311) has an annular limiting step (312) on the outer side of the circumference, located on the inner side of the end face of the left half shaft (31) and corresponding to one end of the claw disk body (5). The end of the claw disk sliding part (51) away from the left half shaft (31) has a sliding column (52) that axially moves through the end face of the small cylindrical body (321) and extends into the large cylindrical body (322).

4. The ultra-thin double-clamp high-speed spindle spring clamping built-in hydraulic release mechanism according to claim 3, characterized in that, The spring clamping drive mechanism (6) includes several spring clamping drive assemblies (61) arranged circumferentially between the inner side of the left half shaft (31) near the right half shaft (32) and the outer side of the small cylindrical body (321). One end of the spring clamping drive assembly (61) acts on the left half shaft (31) and the other end acts on one side of the claw disc body (5).

5. The ultra-thin double-clamp high-speed spindle spring clamping built-in hydraulic release mechanism according to claim 4, characterized in that, The spring clamping drive assembly (61) includes several spring mounting holes (611) circumferentially arranged in the annular mounting steps (311) and extending axially along the large cylindrical body (322). The spring mounting holes (611) correspond one-to-one with the guide grooves (323) and are interconnected. The bottom of the spring mounting hole (611) has a first guide post positioning groove (612), and the claw disc body (5) has a second guide post positioning groove (613) corresponding to the first guide post positioning groove (612) on one side. A spring guide post (614) is provided between the first guide post positioning groove (612) and the second guide post positioning groove (613) and passes through the spring mounting hole (611) and the guide groove (323) in sequence. A butterfly spring assembly (615) is sleeved on the spring guide post (614). One end of the butterfly spring assembly (615) acts on the bottom of the spring mounting hole (611) and the other end acts on one side of the claw disc body (5).

6. The ultra-thin double-clamp high-speed spindle spring clamping built-in hydraulic release mechanism according to claim 2, 3, 4, or 5, is characterized in that, The hydraulic release drive mechanism (7) includes a cylinder liner (71) disposed on the inner side of the main shaft seat (1) and sleeved on the outer side of the right half shaft (32). An end cap spacer (72) is fixedly provided at one end of the cylinder liner (71) near the left half shaft (31). The inner side of the cylinder liner (71) has a hydraulic cavity (73), and a piston body (74) sleeved on the outer side of the right half shaft (32) is axially slidably disposed in the hydraulic cavity (73). The inner side of the piston body (74) has an annular pushing step (75) that abuts against the outer side of the claw disc body (5). The outer side of the main shaft seat (1) is provided with a hydraulic oil inlet (76). (76) A hydraulic inlet channel (77) is connected to the cylinder liner body (71) radially and to the hydraulic chamber (73), and one end of the hydraulic inlet channel (77) extends to the side of the piston body (74) away from the left half shaft (31). The end cap spacer (72) is provided with a hydraulic outlet hole (78) on the outer side of the circumference. The hydraulic outlet hole (78) is connected to a hydraulic outlet channel (79) that is connected to the end cap spacer (72) radially and to the hydraulic chamber (73), and one end of the hydraulic outlet channel (79) extends to the side of the piston body (74) near the left half shaft (31). The piston body (74) is provided with piston position sensing components (8) on both sides.

7. The ultra-thin double-clamp high-speed spindle spring clamping built-in hydraulic release mechanism according to claim 6, characterized in that, The piston position sensing assembly (8) includes a first piston movement gap (81) disposed between the inner circumferential side of the cylinder liner (71) and the outer circumferential side of the large cylindrical body (322) and through which one end of the piston body (74) passes. A first piston position proximity switch (82) is radially disposed on the outer circumferential side of the main shaft seat (1). The first piston position proximity switch (82) passes through the cylinder liner (71) and extends to the first piston movement gap (81). The end cap spacer (72) has a second piston movement gap (83) on the inner circumferential side for the other end of the piston body (74) to pass through. A second piston position proximity switch (84) is radially disposed on the outer circumferential side of the end cap spacer (72). The second piston position proximity switch (84) passes through the end cap spacer (72) and extends to the second piston movement gap (83).

8. The ultra-thin double-clamp high-speed spindle spring clamping built-in hydraulic release mechanism according to claim 1, characterized in that, The bearing mounting structure (2) includes a left bearing assembly (21) disposed between the inner circumferential side of one end of the spindle seat (1) and the outer circumferential side of the left half-shaft (31) away from the right half-shaft (32). A right bearing assembly (22) is disposed between the inner circumferential side of the other end of the spindle seat (1) and the outer circumferential side of the right half-shaft (32) away from the left half-shaft (31). The claw disc body (5) and the hydraulic release drive mechanism (7) are located between the left bearing assembly (21) and the right bearing assembly (22). The left bearing assembly (21) includes a left angular contact bearing (211) disposed between the inner circumferential side of one end of the spindle seat (1) and the outer circumferential side of the left half-shaft (31) away from the right half-shaft (32). A left bearing cap (212) is provided on one end face of the spindle seat (1), and the inner circumferential side of the left bearing cap (212) is provided with a bearing that is in contact with the left half-shaft (31). The left bearing waterproof disc (213) is connected. The spindle seat (1) is provided with a plurality of left bearing lubricating oil vents (214) and a left bearing temperature sensor (215) extending to the outside of the left angular contact bearing (211). The right bearing assembly (22) includes a right angular contact bearing (221) disposed between the inner side of the spindle seat (1) away from the left bearing assembly (21) and the outer side of the large cylindrical body (322). The end face of the spindle seat (1) away from the left bearing assembly (21) is provided with a right bearing cap (222), and the outer side of the right bearing cap (222) is provided with a right bearing waterproof disc (223) connected to the right half shaft (32). The spindle seat (1) is provided with a plurality of right bearing lubricating oil vents (224) and a right bearing temperature sensor (225) extending to the outside of the right angular contact bearing (221).

9. The ultra-thin double-clamp high-speed spindle spring clamping built-in hydraulic release mechanism according to claim 8, characterized in that, The clamp mounting assembly (4) includes a right conical disc (41) disposed on the inner side of the right half shaft (32) and connected to the sliding column (52) by several fixing bolts. The right conical disc (41) has a right conical surface (42) on its inner side. The left half shaft (31) has a left conical part (43) that is integrally connected to the left half shaft (31) on its inner side. A pull tube (44) is provided between the left conical part (43) and the right conical disc (41). The left conical part (43) has a left conical surface (45) that is symmetrically arranged with the right conical surface (42) on its inner side.

10. The ultra-thin double-clamp high-speed spindle spring clamping built-in hydraulic release mechanism according to claim 8, characterized in that, The left half-shaft (31) has a main shaft synchronous pulley (9) on the outer side of the end near the right half-shaft (32), and the outer side of the main shaft seat (1) is provided with a synchronous belt connection notch (11) corresponding to the main shaft synchronous pulley (9). The left bearing waterproof disc (213) is provided with a magnetic ring encoder (10) on the outer side, and the left bearing cover (212) is provided with an encoder reading head (101) extending to the outer side of the magnetic ring encoder (10), and the outer side of the left bearing cover (212) is provided with an encoder waterproof cover (102) connected to the left bearing waterproof disc (213).

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