Crystal grinding machine

Abstract

The present invention relates to a crystal grinding machine, including a frame, a workbench arranged on the frame, a slide plate arranged on the workbench, a first driving mechanism for driving the slide plate to slide on the workbench, a fixture for clamping a workpiece to be processed, a plurality of grinding discs arranged corresponding to the fixture, and a second driving mechanism for driving the grinding disc to rotate. The fixture is detachably mounted on the slide plate, the grinding disc is rotatably mounted on the workbench, the fixture has a plurality of stations, each station is provided with a mounting mechanism for clamping the workpiece to be processed, and each mounting mechanism is arranged corresponding to a grinding disc. After adopting the technical solution of the present invention, the workpiece on the fixture is driven to move by the slide plate, and the workpiece is polished by the rotation of the grinding disc. In the present invention, the fixture is detachably mounted on the slide plate, the fixture has a plurality of mounting stations, and a plurality of workpieces can be clamped at one time, thereby improving the processing efficiency of the workpiece. In addition, the present invention has the advantage of convenient disassembly and assembly of the workpiece by designing a fixture with a specific structure, which can improve the processing efficiency of the workpiece and improve the polishing effect.

Description

Technical Field

[0001] The invention relates to a crystal grinding machine. Background Art

[0002] Some precision and tiny optical crystals use columnar crystal blanks, and the end faces of the columnar crystals are processed into spherical shapes through grinding. Traditional grinding devices are not reasonably designed, inconvenient to operate, and the work efficiency and stability are not satisfactory.

[0003] In view of this, the inventor of this case conducted in-depth research on the above-mentioned issues, which led to the emergence of this case. Summary of the invention

[0004] An object of the present invention is to provide a crystal grinding machine capable of improving processing efficiency.

[0005] In order to achieve the above object, the present invention adopts such technical solution:

[0006] A crystal grinding machine includes a frame, a workbench arranged on the frame, a slide plate arranged on the workbench, a first driving mechanism for driving the slide plate to slide on the workbench, a fixture for clamping a workpiece to be processed, a plurality of grinding discs arranged corresponding to the fixture, and a second driving mechanism for driving the grinding discs to rotate. The fixture is detachably mounted on the slide plate, the grinding discs are rotatably mounted on the workbench, the fixture has a plurality of workstations, each workstation is provided with a mounting mechanism for clamping the workpiece to be processed, and each mounting mechanism is arranged corresponding to a grinding disc.

[0007] As a preferred embodiment of the present invention, a slide rail is provided on the workbench, and the slide plate is slidably arranged on the slide rail. The first driving mechanism includes a first motor, a rotating block is provided on the output shaft of the first motor, and also includes a driving connecting rod, one end of the driving connecting rod is hinged on the rotating block and is eccentrically arranged relative to the rotating block, and the other end is hinged on the slide plate.

[0008] As a preferred embodiment of the present invention, a support beam is provided on the frame, a rotating sleeve is provided in the support beam along the vertical direction, the second driving mechanism is transmission-connected with the rotating sleeve, a supporting rod is provided on the rotating sleeve, the supporting rod is installed in the rotating sleeve in a manner that it cannot rotate relative to the rotating sleeve but can move axially relative to the rotating sleeve, and the grinding disc is arranged at the upper end of the supporting rod.

[0009] As a preferred embodiment of the present invention, it also includes a pre-tightening screw arranged on the frame, the pre-tightening screw is provided with a threaded portion and a smooth rod portion, a limit platform is formed between the threaded portion and the smooth rod portion, a pre-tightening spring is sleeved on the smooth rod portion, the smooth rod portion extends into the rotating sleeve, one end of the pre-tightening spring abuts against the limit platform, and the other end is provided with a ball, and the ball abuts against the lower end of the support rod.

[0010] As a preferred embodiment of the present invention, the second driving mechanism includes a second motor and a driving shaft rotatably arranged on the frame, the output shaft of the second motor is connected to the driving shaft through a first transmission belt, and the driving shaft is connected to the rotating sleeve through a second transmission belt.

[0011] As a preferred embodiment of the present invention, a cooling water distribution plate is provided on the workbench, the cooling water distribution plate is connected to a water source, and a plurality of cooling water nozzles are provided on the cooling water distribution plate.

[0012] As a preferred embodiment of the present invention, the fixture includes a base, a rotating body rotatably arranged on the base within a set range, and an installation mechanism for installing a workpiece to be processed. The axial direction of the rotating body is arranged in the horizontal direction. The installation mechanism includes a core body arranged in the vertical direction and a sleeve arranged outside the core body. A plurality of core petals that can slide relative to the sleeve and can open and close are arranged at one end of the core body. The plurality of core petals form a clamping space for clamping the workpiece. A limit member is arranged at the other end of the core body. An elastic member that can press the sleeve and make the plurality of core petals close to clamp the workpiece is arranged between the limit member and the sleeve. The lower end of the core body is arranged corresponding to the grinding wheel.

[0013] As a preferred embodiment of the present invention, the limiting member is a limiting nut, and a thread cooperating with the limiting nut is provided on the core body, and the elastic member is a pressure spring, one end of the pressure spring presses against the sleeve, and the other end presses against the limiting nut, an outer conical surface is provided on one end of the core body corresponding to the core petal, and an inner conical surface is provided on the sleeve correspondingly, a mounting hole is provided on the rotating body, and the sleeve is inserted into the mounting hole, a first limiting portion for limiting the sleeve to slide upward is provided at the lower end of the sleeve, and a second limiting portion for limiting the sleeve to slide downward is provided at the upper end of the sleeve.

[0014] As a preferred embodiment of the present invention, the base includes a first vertical plate, a second vertical plate and a connecting plate connecting the first vertical plate and the second vertical plate, the first vertical plate and the second vertical plate are both arranged in the vertical direction, and the connecting plate is arranged in the horizontal direction, the two ends of the rotating body are respectively mounted on the first vertical plate and the second vertical plate through bearings, the connecting plate is provided with a through hole for the mounting mechanism to pass through, and also includes a guide rod arranged on the first vertical plate and the second vertical plate, the guide rod is arranged in the horizontal direction, and also includes a limit plate slidably mounted on the guide rod, the limit plate is arranged between the first vertical plate and the second vertical plate, and a through hole for the jacket to pass through is provided on the limit plate A limit hole extending upward has a first limit wall for limiting the deflection of the sleeve and a second limit wall for allowing the sleeve to deflect within a predetermined range. A pressure spring is sleeved on the guide rod to press the first limit wall against the sleeve. A driving block is also provided on the base to make the sleeve slide in the guide rod and disengage from the first limit wall. The driving block is rotatably mounted between the first vertical plate and the second vertical plate through a rotating shaft. A first guide bevel is provided on the limit plate, and a second guide bevel for driving the limit plate to move axially is provided on the driving block corresponding to the first guide bevel.

[0015] As a preferred embodiment of the present invention, the slide plate is provided with a pressing mechanism for driving the driving block to rotate around the rotating shaft and driving the limiting plate to move.

[0016] After adopting the technical solution of the present invention, the workpiece on the fixture is driven to move by the slide, and the workpiece is polished by the rotation of the grinding disc. In the present invention, the fixture is detachably arranged on the slide, and the fixture has multiple installation positions, and multiple workpieces can be clamped at one time, thereby improving the processing efficiency of the workpiece. In addition, the present invention has the advantage of convenient disassembly and assembly of the workpiece by designing a fixture with a specific structure, which can improve the processing efficiency of the workpiece. By setting the limit plate of the fixture, the yaw motion of the workpiece is realized, thereby improving the polishing effect. The present invention can adjust the preload force of the contact between the grinding disc and the workpiece through the preload screw and the preload spring, thereby improving the polishing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention.

[0019] Figure 3 It is a structural schematic diagram of the present invention from another angle.

[0020] Figure 4 It is a schematic diagram of the structure of the clamp in the present invention.

[0021] Figure 5 It is a schematic diagram of the decomposed structure of the clamp in the present invention.

[0022] In the figure:

[0023] Frame 10 Support beam 11

[0024] Workbench 20 Slide 21

[0025] Slide rail 22 First motor 23

[0026] Rotating block 24 Driving connecting rod 25

[0027] Groove seat 26 Presser 27

[0028] Fixture 30 First vertical plate 301

[0029] Second vertical plate 302 Connecting plate 303

[0030] Through hole 304 Limiting plate 305

[0031] Limiting hole 306 First limiting wall 3061

[0032] The second limiting wall 3062 presses against the spring 307

[0033] First guide slope 308 Driving block 309

[0034] The second guide slope 310 and the pressing portion 311

[0035] Rotating shaft 312 Guide rod 313

[0036] Rotating body 314 Mounting hole 315

[0037] Core 316 Jacket 317

[0038] Core petal 318 Elastic member 319

[0039] Limiting nut 320 First limiting portion 321

[0040] The outer conical surface 323 of the second limiting portion 322

[0041] Inner cone 324

[0042] Grinding disc 40 Grinding groove 41

[0043] Pre-tightening screw 42 threaded portion 421

[0044] Bare rod 422 Limiting platform 423

[0045] Preload spring 43 Ball 44

[0046] Support rod 45 Rotating sleeve 46

[0047] Second motor 50 First transmission belt 51

[0048] Drive shaft 52 Second drive belt 53

[0049] Cooling water distribution plate 60 Nozzle 61 DETAILED DESCRIPTION

[0050] In order to further explain the technical solution of the present invention, the following is a detailed description in conjunction with the embodiments. In the drawings of the present invention, for multiple components with the same structure, some drawings only show one component.

[0051] Reference Figures 1 to 5 The crystal grinding machine includes a frame 10, a workbench 20 arranged on the frame 10, a slide plate 21 arranged on the workbench 20, a first driving mechanism for driving the slide plate 21 to slide on the workbench 20, a fixture 30 for clamping a workpiece to be processed, a plurality of grinding discs 40 arranged corresponding to the fixture 30, and a second driving mechanism for driving the grinding discs 40 to rotate. The workbench 20 and the slide plate 21 are both arranged in a horizontal direction. The grinding machine of the present invention can be used to process columnar optical crystals and process a hemispherical surface at one end of the columnar optical crystal.

[0052] In the present invention, the fixture 30 is detachably mounted on the slide plate 21, and the grinding disc 40 is rotatably mounted on the workbench 20. The grinding disc 40 is provided with a hemispherical grinding groove 41. During processing, the workpiece contacts the grinding groove 41 for grinding. The fixture 30 of the present invention has a plurality of workstations, each of which is provided with a mounting mechanism for clamping the workpiece to be processed, each mounting mechanism can mount one workpiece, and each mounting mechanism is provided corresponding to one grinding disc 40.

[0053] As a preferred embodiment of the present invention, the workbench 20 is provided with a slide rail 22. In the embodiment, there are two slide rails 22, which are arranged in parallel. The slide plate 21 is slidably arranged on the slide rails 22. The first driving mechanism includes a first motor 23, the output shaft of the first motor 23 is arranged in the vertical direction, and a rotating block 24 is arranged on the output shaft of the first motor 23. It also includes a driving connecting rod 25, one end of the driving connecting rod 25 is hinged on the rotating block 24 and is eccentrically arranged relative to the rotating block 24, and the other end is hinged on the slide plate 21, and the driving connecting rod 25 is arranged in the horizontal direction. In the present invention, the first driving mechanism is not limited to the structure of the rotating block 24 and the driving connecting rod 25, and other driving mechanisms that can drive the slide plate 21 to move back and forth within a predetermined range can also be used.

[0054] As a preferred embodiment of the present invention, the frame 10 is provided with a support beam 11, the support beam 11 is arranged in the horizontal direction, and a rotating sleeve 46 is arranged in the support beam 11 in the vertical direction, and the rotating sleeve 46 can be rotatably arranged in the support beam 11 through a bearing. The second driving mechanism is connected to the rotating sleeve 46 in a transmission manner, and a supporting rod 45 is arranged on the rotating sleeve 46. The supporting rod 45 is installed in the rotating sleeve 46 in a manner that it cannot rotate relative to the rotating sleeve 46 but can move axially relative to the rotating sleeve 46. The supporting rod 45 and the rotating sleeve 46 can usually be connected in a key and keyway manner. The grinding disc 40 is arranged at the upper end of the supporting rod 45. When the rotating sleeve 46 rotates, the grinding disc 40, the supporting rod 45 and the rotating sleeve 46 rotate synchronously. In the embodiment of the present invention, a corresponding groove seat 26 is arranged on the slide plate 21, and two sets of clamps 30 can be placed (only one set of clamps 30 is shown in the figure), and the two ends of the clamps 30 are respectively placed in the groove seat 26, and a grinding disc 40 is arranged on the workbench 20 corresponding to each set of clamps 30. As a preferred embodiment of the present invention, a cooling water distribution plate 60 is provided on the workbench 20, the cooling water distribution plate 60 is connected to a water source, a plurality of cooling water nozzles 61 are provided on the cooling water distribution plate 60, and two sets of fixtures 30 are respectively arranged on both sides of the cooling water distribution plate 60. The cooling water can cool the workpiece and the grinding disc 40 on the one hand, and can wash the powder in the grinding disc 40 on the other hand.

[0055] As a preferred embodiment of the present invention, it also includes a pre-tightening screw 42 arranged on the frame 10, the pre-tightening screw 42 is arranged in the vertical direction, and a threaded portion 421 and a smooth rod portion 422 are provided on the pre-tightening screw 42, the threaded portion 421 is screwed on the frame 10, and a limit platform 423 is formed between the threaded portion 421 and the smooth rod portion 422, a pre-tightening spring 43 is sleeved on the smooth rod portion 422, and the smooth rod portion 422 extends into the rotating sleeve 46, one end of the pre-tightening spring 43 abuts against the limit platform 423, and the other end is provided with a ball 44, the ball 44 can roll on the upper end of the pre-tightening spring 43, and the ball 44 abuts against the lower end of the support rod 45. By rotating the pre-tightening screw 42, the height of the limit platform 423 of the pre-tightening screw 42 can be adjusted, thereby adjusting the elastic force of the pre-tightening spring 43. The pre-tightening spring 43 applies an upward force to the support rod 45 through the ball 44 to ensure that during the grinding process, the grinding wheel 40 is pressed against the workpiece with appropriate pressure, and the pre-tightening spring 43 will not interfere with the normal rotation of the support rod 45.

[0056] As a preferred embodiment of the present invention, the second driving mechanism includes a second motor 50 and a driving shaft 52 rotatably arranged on the frame 10, the driving shaft 52 is arranged in a horizontal direction, the output shaft of the second motor 50 is connected to the driving shaft 52 through a first transmission belt 51, and the driving shaft 52 is connected to the rotating sleeve 46 through a second transmission belt 53.

[0057] The clamp 30 of the present invention includes a base, a rotating body 314 rotatably arranged on the base within a set range, and a mounting mechanism for mounting a workpiece to be processed. The axial direction of the rotating body 314 is arranged in the horizontal direction. The mounting mechanism includes a core body 316 arranged in the vertical direction (with the normal use of the clamp 30 as a reference orientation) and a jacket 317 sleeved outside the core body 316. The core body 316 is rod-shaped, and the jacket 317 is cylindrical. A plurality of core petals 318 that can slide relative to the jacket 317 and can be opened and closed are arranged at one end of the core body 316. The plurality of core petals 318 surround a clamping space for clamping the workpiece. , there are 3 to 4 core petals 318, a limiter is provided at the other end of the core body 316, and an elastic member 319 is provided between the limiter and the jacket 317, which can press the jacket 317 and make the multiple core petals 318 close to clamp the workpiece. When in use, by applying a force, the jacket 317 and the limiter are close to each other, so that the core petals 318 are opened, and after the workpiece to be processed is placed, the above force is removed, the elastic member 319 presses the jacket 317, and the jacket 317 makes the core petals 318 close and clamp the workpiece. The lower end of the core body 316 is set corresponding to the grinding disc 40, and the workpiece is inserted into the grinding disc 40 for grinding. The clamp 30 of the present invention has the advantages of simple structure and convenient disassembly and assembly of workpieces. In addition to being used in the grinder introduced above, it can also be used in grinders of other structures.

[0058] As a preferred embodiment of the present invention, the limiting member is a limiting nut 320, a thread matching the limiting nut 320 is provided on the core body 316, the elastic member 319 is a pressure spring, one end of the pressure spring abuts against the jacket 317, and the other end abuts against the limiting nut 320, and the preload force of the pressure spring can be adjusted by the limiting nut 320. An outer conical surface 323 is provided on one end of the core body 316 corresponding to the core petal 318, and an inner conical surface 324 is provided on the jacket 317. Through the matching of the conical surfaces, the axial movement of the core body 316 is converted into a force on the circumferential surface of the core body 316, so that the core petal 318 can be retracted and opened. The rotating body 314 is provided with a mounting hole 315, and the mounting hole 315 is arranged perpendicular to the axis of the rotating body 314. The sleeve 317 is inserted into the mounting hole 315. The lower end of the sleeve 317 is provided with a first limiting portion 321 for limiting the sleeve 317 from sliding upward, and the upper end of the sleeve 317 is provided with a second limiting portion 322 for limiting the sleeve 317 from sliding downward. The first limiting portion 321 and the second limiting portion 322 can adopt structures such as retaining rings or limiting steps, and the axial movement of the sleeve 317 is limited by the first limiting portion 321 and the second limiting portion 322.

[0059] As a preferred embodiment of the present invention, the base includes a first vertical plate 301, a second vertical plate 302, and a connecting plate 303 connecting the first vertical plate 301 and the second vertical plate 302. The first vertical plate 301 and the second vertical plate 302 are both arranged in the vertical direction, and the connecting plate 303 is arranged in the horizontal direction. The two ends of the connecting plate 303 are respectively arranged at the lower end of the first vertical plate 301 and the lower end of the second vertical plate 302. The two ends of the rotating body 314 are respectively installed on the first vertical plate 301 and the second vertical plate 302 through bearings, and the rotating body 314 can rotate without axial movement. The connecting plate 303 is provided with a through hole 304 for the installation mechanism to pass through, and the core 316 is passed through the through hole 304. The present invention also includes guide rods 313 arranged on the first vertical plate 301 and the second vertical plate 302. The guide rods 313 are at least two and are arranged in the horizontal direction. The present invention also includes a limit plate 305 slidably mounted on the guide rod 313, the limit plate 305 is arranged between the first vertical plate 301 and the second vertical plate 302, and a limit hole 306 is provided on the limit plate 305 for the sleeve 317 to extend upward, the limit hole 306 has a first limit wall 3061 for limiting the deflection of the sleeve 317 and a second limit wall 3062 for allowing the sleeve 317 to deflect within a predetermined range. In an embodiment, there are two second limit walls 3062, and the two second limit walls 3062 are arranged on both sides of the first limit wall 3061, and the first limit wall 3061 extends toward the first vertical plate 301. When the first limit wall 3061 is clamped in the clamping sleeve, the rotating body 314 will be difficult to rotate. At this time, the sleeve 317 will not deflect, and the position is relatively stable, which is convenient for disassembly and assembly of workpieces. A pressing spring 307 is sleeved on the guide rod 313, which can make the first limiting wall 3061 press against the jacket 317. The two ends of the pressing spring 307 are respectively pressed against the limiting plate 305 and the first vertical plate 301. In the initial state, the pressing spring 307 can push the first limiting wall 3061 to move to the jacket 317. A driving block 309 is also provided on the base, which is used to make the jacket 317 slide in the guide rod 313 and disengage from the first limiting wall 3061. The driving block 309 is rotatably installed between the first vertical plate 301 and the second vertical plate 302 through a rotating shaft 312. A first guiding inclined surface 308 is provided on the limiting plate 305, and a second guiding inclined surface 310 is provided on the driving block 309 corresponding to the first guiding inclined surface 308 for driving the limiting plate 305 to move along the axial direction. A pressing portion 311 is also provided on the driving block 309. The pressing portion 311 and the second guide slope 310 are respectively arranged on both sides of the rotating shaft 312. When in use, the second guide slope 310 can be lifted upward by pressing the pressing portion 311 downward. The second guide slope 310 acts on the first guide slope 308, thereby pushing the limiting plate 305 to move toward the first vertical plate 301, thereby allowing the first limiting wall 3601 to detach from the sleeve 317.

[0060] As a preferred embodiment of the present invention, the slide plate 21 is provided with a pressing mechanism for driving the driving block 309 to rotate around the rotating shaft 312 and driving the limit plate 305 to move. The pressing mechanism can be a driving mechanism such as a cylinder to act on the pressing part 311. It can also be manually operated. https: / / item.taobao.com / item.htm?id= 548929621139&ali_refid=a3_430676_1006:1121101674:N:FqySp8BSYlP3nx82ZFv5IQ% 3D%3D:6964a5948783d15042e38d8859815c64&ali_trackid=1_6964a5948783d15042e38 d8859815c64&spm=a2e1u.19484427.29996460.7 The vertical quick clamp workpiece fixing clamp disclosed in the embodiment of the present invention adopts such a clamp 27, and each clamp 30 is equipped with two clamps 27 (only one is shown in the figure). After the two ends of the clamp 30 are placed in the groove seat 26, the clamp 27 presses the driving block 309 downward, so that the jacket 317 can deflect in the second limiting wall 3062, and the workpiece to be processed deflects during the grinding process.

[0061] The product form of the present invention is not limited to the embodiments of this case. Any appropriate changes or modifications made by anyone with similar ideas should be deemed to be within the patent scope of the present invention.

Claims

1. Crystal grinding machine, characterized in that: The machine comprises a frame, a workbench arranged on the frame, a slide plate arranged on the workbench, a first driving mechanism for driving the slide plate to slide on the workbench, a fixture for clamping a workpiece to be processed, a plurality of grinding discs arranged corresponding to the fixture, and a second driving mechanism for driving the grinding discs to rotate, wherein the fixture is detachably mounted on the slide plate, the grinding discs are rotatably mounted on the workbench, the fixture has a plurality of workstations, each workstation is provided with a mounting mechanism for clamping the workpiece to be processed, and each mounting mechanism is arranged corresponding to a grinding disc; The frame is provided with a support beam, a rotating sleeve is provided in the support beam along the vertical direction, the second driving mechanism is in transmission connection with the rotating sleeve, a supporting rod is provided on the rotating sleeve, the supporting rod is installed in the rotating sleeve in a manner that it cannot rotate relative to the rotating sleeve but can move axially relative to the rotating sleeve, and the grinding disc is arranged at the upper end of the supporting rod; It also includes a pre-tightening screw arranged on the frame, the pre-tightening screw is provided with a threaded portion and a polished rod portion, a limit platform is formed between the threaded portion and the polished rod portion, a pre-tightening spring is sleeved on the polished rod portion, the polished rod portion extends into the rotating sleeve, one end of the pre-tightening spring abuts against the limit platform, and the other end is provided with a ball, and the ball abuts against the lower end of the support rod; The workbench is provided with a cooling water distribution plate, the cooling water distribution plate is connected to a water source, and a plurality of cooling water nozzles are provided on the cooling water distribution plate; The clamp includes a base, a rotating body rotatably arranged on the base within a set range, and an installation mechanism for installing a workpiece to be processed. The axial direction of the rotating body is arranged in the horizontal direction. The installation mechanism includes a core body arranged in the vertical direction and a sleeve arranged outside the core body. A plurality of core petals that can slide relative to the sleeve and can open and close are arranged at one end of the core body. The plurality of core petals form a clamping space for clamping the workpiece. A limit piece is arranged at the other end of the core body. An elastic piece that can press the sleeve and make the plurality of core petals close to clamp the workpiece is arranged between the limit piece and the sleeve. The lower end of the core body is arranged corresponding to the grinding disc.

2. The crystal grinding machine according to claim 1, characterized in that: The workbench is provided with a slide rail, and the slide plate is slidably arranged on the slide rail. The first driving mechanism includes a first motor, a rotating block is arranged on the output shaft of the first motor, and also includes a driving connecting rod, one end of the driving connecting rod is hinged on the rotating block and is eccentrically arranged relative to the rotating block, and the other end is hinged on the slide plate.

3. The crystal grinding machine according to claim 1, characterized in that: The second driving mechanism includes a second motor and a driving shaft rotatably arranged on the frame, the output shaft of the second motor is connected to the driving shaft through a first transmission belt, and the driving shaft is connected to the rotating sleeve through a second transmission belt.

4. The crystal grinding machine according to claim 1, characterized in that: The limiting member is a limiting nut, and a thread matching the limiting nut is provided on the core body. The elastic member is a pressure spring, one end of the pressure spring presses against the sleeve, and the other end presses against the limiting nut. An outer conical surface is provided at one end of the core body corresponding to the core petal, and an inner conical surface is provided on the sleeve accordingly. A mounting hole is provided on the rotating body, and the sleeve is inserted into the mounting hole. A first limiting portion for limiting the sleeve to slide upward is provided at the lower end of the sleeve, and a second limiting portion for limiting the sleeve to slide downward is provided at the upper end of the sleeve.

5. The crystal grinding machine according to claim 1, wherein: The base includes a first vertical plate, a second vertical plate and a connecting plate connecting the first vertical plate and the second vertical plate, the first vertical plate and the second vertical plate are both arranged in the vertical direction, and the connecting plate is arranged in the horizontal direction, the two ends of the rotating body are respectively mounted on the first vertical plate and the second vertical plate through bearings, the connecting plate is provided with a through hole for the mounting mechanism to pass through, and also includes a guide rod arranged on the first vertical plate and the second vertical plate, the guide rod is arranged in the horizontal direction, and also includes a limit plate slidably sleeved on the guide rod, the limit plate is arranged between the first vertical plate and the second vertical plate, and a limit plate for the jacket to extend upward is provided on the limit plate The limiting hole has a first limiting wall for limiting the deflection of the sleeve and a second limiting wall for allowing the sleeve to deflect within a predetermined range. A pressure spring is sleeved on the guide rod to press the first limiting wall against the sleeve. A driving block is also provided on the base to make the sleeve slide in the guide rod and disengage from the first limiting wall. The driving block is rotatably mounted between the first vertical plate and the second vertical plate through a rotating shaft. A first guiding inclined surface is provided on the limiting plate, and a second guiding inclined surface corresponding to the first guiding inclined surface is provided on the driving block to drive the limiting plate to move axially.

6. The crystal grinding machine according to claim 5, characterized in that: The slide plate is provided with a pressing mechanism for driving the driving block to rotate around the rotating shaft and driving the limiting plate to move.

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