Graphite bearing inner hole grinding device

Abstract

The invention provides a graphite bearing inner hole grinding device, and belongs to the technical field of grinding equipment, the graphite bearing inner hole grinding device comprises a mounting plate and an equipment box, the top of the mounting plate is provided with a bearing assembly for placing a bearing grinding blank; the bearing assembly comprises a containing disc capable of moving up and down, and a plurality of sets of fixing claws used for clamping bearing polishing blanks are arranged at the top of the containing disc and distributed in a radial shape. A shell is arranged at the top of the mounting plate, a grinding assembly is arranged in the shell and comprises a rotating disc and multiple sets of grinding blocks used for grinding inner holes of bearing grinding blanks, and the multiple sets of grinding blocks are slidably arranged at the bottom of the rotating disc, so that the grinding blocks can move outwards under the centrifugal force effect of the rotating disc; the grinding device is in contact with an inner hole of a bearing grinding blank, the grinding pressure can be adjusted along with the centrifugal force, the defects of edge breakage, cracks and the like caused by local stress concentration of a traditional rigid tool are overcome, and the machining quality and the yield of graphite bearings are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of grinding equipment, and more specifically, particularly relates to a graphite bearing inner hole grinding device. Background Art

[0002] With the development of intelligent manufacturing technology, the demand for high-precision and high-efficiency processing of graphite bearings is becoming increasingly prominent; currently, the inner hole processing of graphite bearings mainly uses grinding processes, and external cylindrical grinding machines or internal cylindrical grinding machines are used for processing graphite bearings.

[0003] For example, the Chinese invention patent with the patent number 202410971733.3 provides a graphite bearing inner hole ultra-fine grinding device. When this device is in use, the graphite bearing is fixed by a clamping arm, the fourth motor is started to drive the graphite bearing clamped by the clamping arm to rotate, and finally the lower box body moves on the first screw through a sleeve rod to drive the internal grinding head to grind the inner hole of the graphite bearing; however, by analyzing the above patent and combining with the existing technology, it is found that the existing inner hole grinding devices use rigid grinding tools to contact the inner hole of the graphite bearing, and the rigid grinding tools are prone to surface defects such as chipping and cracking due to local stress concentration, resulting in a relatively high rejection rate. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a graphite bearing inner hole grinding device to solve the technical problems in the prior art that traditional grinding devices use rigid grinding tools to contact the inner hole of the graphite bearing, and the rigid grinding tools are prone to surface defects such as chipping and cracking due to local stress concentration, resulting in a relatively high rejection rate.

[0005] The purpose and efficacy of a graphite bearing inner hole grinding device of the present invention are achieved by the following specific technical means:

[0006] A graphite bearing inner hole grinding device includes a mounting plate and an equipment box. The equipment box is arranged at the bottom of the mounting plate, and a bearing grinding blank placing component is arranged at the top of the mounting plate.

[0007] The bearing grinding blank placing component includes a placement disc that can move up and down. The placement disc is arranged above the mounting plate, and a plurality of fixing claws for clamping the bearing grinding blank are arranged at the top of the placement disc. The plurality of fixing claws are radially distributed.

[0008] The top of the mounting plate is provided with a housing, and a grinding assembly is arranged inside the housing. The grinding assembly includes a rotating disc and multiple grinding blocks for grinding the inner hole of the bearing grinding blank. The rotating disc is rotatably arranged inside the housing, and multiple grinding blocks are slidably arranged at the bottom of the rotating disc. The multiple grinding blocks are also radially distributed. A rotatable collar is further arranged at the bottom of the rotating disc. In the state of fixing the bearing grinding blank, the inner sides of the collars are all in contact with multiple fixing claws.

[0009] According to a preferred embodiment, multiple first sliding tracks are arranged at the bottom of the rotating disc corresponding to the multiple grinding blocks. First sliding blocks are arranged at the tops of the multiple grinding blocks, and the multiple first sliding blocks are respectively slidably connected to the multiple first sliding tracks.

[0010] A centripetal block is arranged at the central position of the bottom of the rotating disc. Multiple mounting seats are arranged at the periphery of the centripetal block corresponding to the multiple grinding blocks. The multiple mounting seats are respectively connected to the multiple grinding blocks through multiple elastic pulling components.

[0011] An installation ring is further arranged at the bottom of the rotating disc. A rotating groove is formed inside the installation ring, and the collar is rotatably installed in the rotating groove.

[0012] According to a preferred embodiment, the elastic pulling component includes a first connecting seat. One end of the first connecting seat is connected to one of the mounting seats through a connecting pin, and a T-shaped block is arranged at the other end of the first connecting seat.

[0013] Two movable blocks are arranged on one side of the grinding block, and the two movable blocks are respectively located on both sides of the T-shaped block. Four buckle seats are respectively arranged at one ends of the T-shaped block and the two movable blocks, and two pulling springs are respectively arranged between the four buckle seats.

[0014] A limiting sleeve is sleeved on the periphery of the T-shaped block, and first limiting blocks are arranged on the opposite sides of the two movable blocks corresponding to the limiting sleeve.

[0015] According to a preferred embodiment, the grinding assembly further includes a rotating rod. A connecting head is arranged at the top of the rotating disc, and the rotating rod is arranged at the top of the connecting head. A grinding motor is arranged at the top of the housing, and the main shaft of the grinding motor is connected to the rotating rod through a gear structure.

[0016] Through holes are respectively formed in the rotating rod and the top of the connecting head. A joint is installed in the through hole at the top of the rotating rod. A liquid infusion pipe for conveying grinding fluid is connected to the top of the joint, and one end of the liquid infusion pipe is connected to an external device for supplying grinding fluid.

[0017] According to a preferred embodiment, a plurality of groups of first flow channel plates are arranged on the periphery of the connector head. First conveying channels are correspondingly formed between the rotary disk and the plurality of groups of first flow channel plates. The first conveying channels are radial. A plurality of nozzles are arranged at the bottom of the rotary disk. The plurality of nozzles are respectively located between the plurality of grinding blocks. The plurality of nozzles are all communicated with the first conveying channels.

[0018] According to a preferred embodiment, an infusion groove is further formed at the bottom of the rotary disk. A plurality of groups of second flow channel plates are arranged on the top of the centripetal block. Second conveying channels are formed on the tops of the plurality of groups of second flow channel plates. An outlet is formed at one end of the second flow channel plate. A sealing pad is arranged on the top of the first sliding block. The top of the sealing pad is in contact with the outlet. A flow guiding block is arranged at one end of the first sliding block. Flow guiding grooves are correspondingly formed at the top of the flow guiding block and one end of the sealing pad corresponding to the outlet. A grinding layer is arranged on one side of the grinding block. A cooling flow channel is formed in the grinding block corresponding to the grinding layer. The top end of the cooling flow channel is communicated with the flow guiding groove.

[0019] According to a preferred embodiment, a plurality of mounting through grooves are formed on the top of the placing disk. Sliding seats are arranged on the tops of the plurality of mounting through grooves. Shielding plates are correspondingly arranged at the bottoms of the plurality of fixing claws corresponding to the mounting through grooves. Second sliding blocks are arranged at the bottoms of the shielding plates. The second sliding blocks are slidably connected with the sliding seats;

[0020] Anti-slip layers are arranged on the adjacent sides of the plurality of fixing claws. A plurality of top blocks are further arranged on the top of the placing disk. The tops of the top blocks are flush with the shielding plates;

[0021] Limiting plates are correspondingly arranged on the opposite sides of the plurality of fixing claws corresponding to the collar.

[0022] According to a preferred embodiment, a plurality of mounting brackets are arranged at the bottom of the placing disk. Sliding grooves are formed on the tops of the plurality of mounting brackets. Movable plates are arranged in the plurality of sliding grooves. Second limiting blocks are arranged on the tops of the movable plates. The second limiting blocks can slidably pass through the mounting through grooves and be connected with the fixing claws;

[0023] Mounting holes are formed in the mounting brackets. A sliding pin shaft is inserted into the mounting holes. A convex block is arranged at the bottom of the movable plate. A through hole is formed in the convex block. One end of the sliding pin shaft is inserted into the through hole. A spring is sleeved on the sliding pin shaft. One end of the spring is in contact with the mounting bracket, and the other end is in contact with the convex block.

[0024] According to a preferred embodiment, a liquid return hole is formed at the central position of the bottom of the placing disk. One end of a telescopic pipe is connected to the bottom end of the liquid return hole. The other end of the telescopic pipe is connected to an external grinding fluid supply device through a pipeline;

[0025] A protective cover is provided on the top of the placement disc. In the state where the bearing grinding blank is fixed, the collar is located inside the protective cover.

[0026] According to a preferred embodiment, second sliding tracks are provided on two opposite inner side surfaces of the outer shell. Sliders are provided on both groups of the second sliding tracks. Second connecting seats are provided on both sides of the placement disc. One sides of the two groups of the second connecting seats are respectively connected to the two groups of the sliders;

[0027] Two hydraulic cylinders are provided at the bottom of the mounting plate. The tops of the two hydraulic cylinders are respectively connected to the two groups of the second connecting seats.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. By rotating multiple groups of elastic pulling components at the bottom of the rotating disc, under the action of centrifugal force, two movable blocks on one side of the grinding block move outward along the limiting sleeve. At the same time, under the action of the pulling spring, an inward force is given to the grinding block, realizing flexible contact with the inner hole of the bearing, being able to adjust the grinding pressure according to the magnitude of the centrifugal force, avoiding defects such as chipping and cracking caused by local stress concentration of traditional rigid tools, and improving the processing quality and finished product rate of the graphite bearing.

[0030] 2. Through the setting of the first delivery channel, when grinding the bearing grinding blank, the grinding fluid is sprayed out from the nozzle through the first delivery channel to cool the external area, and at the same time flows into the cooling channel inside the grinding block through the second delivery channel, forming a three-dimensional cooling structure combining inside and outside, effectively reducing the influence of grinding heat on the material properties, and at the same time washing and recycling the debris in time, reducing dust pollution and secondary wear.

[0031] 3. When fixing the bearing grinding blank, start the two hydraulic cylinders to push the placement disc upward, so that the collar contacts the fixed claw, and push the fixed claw to move along the sliding seat to realize clamping of the bearing blank; at the same time, through the setting of the limiting plate, the coaxiality between the inner hole of the bearing and the grinding component is guaranteed.

[0032] 4. Through the setting of the sealing gasket, the diversion block, the sealing gasket and the cooling channel form a dynamic sealing structure that can change with the centrifugal force. External cooling is provided at the initial stage of grinding. As the centrifugal force increases, the internal cooling path is automatically opened. The sealing gasket moves with the grinding block under the centrifugal force to open the liquid outlet. At this time, the grinding fluid in the second delivery channel flows into the cooling channel inside the grinding block through the diversion groove, cooling the grinding block and further cooling and recycling the debris in the grinding area, realizing reasonable distribution and efficient utilization of cooling resources.

[0033] 5. Through the settings of the protective cover and the collar, after the blank is polished by the fixed bearing, a relatively enclosed processing space can be formed by the protective cover, the collar and the mounting ring to prevent the grinding fluid and debris from overflowing. At the same time, through the settings of the telescopic pipe and the liquid return hole, the recycling of the grinding fluid can be realized, the service life can be extended, and the operation cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is the schematic structural diagram of the present invention after assembly;

[0035] Figure 2 is the schematic structural diagram of the present invention after expansion;

[0036] Figure 3 is the schematic structural diagram of the grinding assembly of the present invention after assembly;

[0037] Figure 4 is the schematic structural diagram of the grinding assembly of the present invention after disassembly;

[0038] Figure 5 is the schematic structural diagram of the first sliding track and the first sliding block of the present invention after assembly;

[0039] Figure 6 is Figure 5 the schematic structural diagram after disassembly;

[0040] Figure 7 is the front view of the grinding assembly of the present invention;

[0041] Figure 8 is Figure 7 the sectional view taken along A-A in;

[0042] Figure 9 is the schematic structural diagram of the elastic pulling assembly of the present invention after assembly;

[0043] Figure 10 is Figure 9 the schematic structural diagram after disassembly;

[0044] Figure 11 is the schematic structural diagram of the bearing assembly of the present invention after assembly;

[0045] Figure 12 is Figure 11 the schematic structural diagram after disassembly;

[0046] Figure 13 is Figure 12 the enlarged schematic diagram of area a in;

[0047] Figure 14 is the schematic structural diagram of the movable plate and the fixed claw of the present invention after assembly;

[0048] Figure 15 isFigure 14 Schematic diagram of the structure after splitting.

[0049] In the figure, the correspondence between the component names and the drawing numbers is as follows:

[0050] 101, mounting plate; 102, equipment box; 103, outer shell; 201, placing disc; 202, fixing claw; 203, mounting through slot; 204, sliding seat; 205, shielding plate; 206, second sliding block; 207, anti-slip layer; 208, top block; 209, limiting plate; 210, mounting bracket; 211, chute; 212, movable plate; 213, second limiting block; 214, mounting hole; 215, sliding pin shaft; 216, convex block; 217, spring; 218, liquid return hole; 219, telescopic tube; 220, protective cover; 221, second sliding track; 222, slider; 223, second connecting seat; 224, hydraulic cylinder; 301, rotating disc; 302, grinding block; 303, collar; 304, first sliding track; 305, first sliding block; 306, centripetal block; 307, mounting seat; 308, mounting ring; 309, rotating groove; 310, rotating rod; 311, connecting head; 313, grinding motor; 314, gear structure; 315, infusion hole; 316, joint; 317, infusion tube; 318, first flow channel plate; 319, first conveying flow channel; 320, nozzle; 321, infusion tank; 322, second flow channel plate; 323, second conveying flow channel; 324, liquid outlet; 325, sealing pad; 326, diversion block; 327, diversion groove; 328, grinding layer; 329, cooling flow channel; 401, first connecting seat; 402, T-shaped block; 403, movable block; 404, buckle seat; 405, pulling spring; 406, limiting sleeve; 407, first limiting block. Specific embodiments

[0051] The following further describes in detail the embodiments of the present invention in conjunction with the drawings and examples. The following examples are used to illustrate the technical solutions of the present invention, but cannot be used to limit the protection scope of the present invention.

[0052] Example:

[0053] As shown in the Figures 1 to 15 drawing:

[0054] The present invention provides a graphite bearing inner hole grinding device, including a mounting plate 101 and an equipment box 102. The equipment box 102 is arranged at the bottom of the mounting plate 101 and is connected to an external circuit to provide electricity for the device. A bearing grinding blank placing and supporting assembly is arranged on the top of the mounting plate 101 to provide a basic support for subsequent grinding processes.

[0055] The bearing component includes a placement disc 201 that can move up and down. The placement disc 201 is arranged above the mounting plate 101. Multiple fixing claws 202 for clamping the bearing grinding blank are arranged on the top of the placement disc 201. The multiple fixing claws 202 are radially distributed. After the bearing grinding blank is placed on the placement disc 201, the fixing claws 202 are synchronously tightened to form a stable clamping on the outer side of the bearing grinding blank, ensuring that the workpiece maintains a fixed posture during the grinding process.

[0056] A housing 103 is arranged on the top of the mounting plate 101. A grinding component is arranged inside the housing 103. The grinding component includes a rotating disc 301 and multiple grinding blocks 302 for grinding the inner hole of the bearing grinding blank. The rotating disc 301 is rotatably arranged inside the housing 103. The rotating disc 301 can perform a rotating motion inside the housing 103, and its rotation axis is coaxial with the axis of the inner hole of the bearing grinding blank; multiple grinding blocks 302 are slidably arranged at the bottom of the rotating disc 301. The multiple grinding blocks 302 are also radially distributed. In addition, a rotatable collar 303 is arranged at the bottom of the rotating disc 301. In the state of fixing the bearing grinding blank, the inner side of the collar 303 contacts the multiple fixing claws 202, and a thrust is applied to the fixing claws 202 to synchronously tighten the fixing claws 202 to clamp the bearing grinding blank.

[0057] Please refer to as Figure 4 、 Figure 5 and Figure 6 As shown, multiple first sliding tracks 304 are arranged at the bottom of the rotating disc 301 corresponding to the multiple grinding blocks 302. First sliding blocks 305 are arranged on the tops of the multiple grinding blocks 302. The multiple first sliding blocks 305 are respectively slidably connected to the multiple first sliding tracks 304, enabling the grinding blocks 302 to move along the first sliding tracks 304 through the first sliding blocks 305; a centripetal block 306 is arranged at the center position of the bottom of the rotating disc 301. Mounting seats 307 corresponding to the number of grinding blocks 302 are distributed on the circumference of the centripetal block 306. Each mounting seat 307 is connected to the corresponding grinding block 302 through an elastic pulling component. Through the arrangement of the multiple elastic pulling components, a centripetal pulling force is applied to the grinding blocks 302 under normal conditions, capable of pulling the multiple grinding blocks 302 towards the centripetal block 306 at the center position of the bottom of the rotating disc 301; an installation ring 308 is also arranged at the bottom of the rotating disc 301. A rotating groove 309 is opened on the inner side of the installation ring 308. The collar 303 is rotatably installed in the rotating groove 309 by means of balls or rollers, forming a relatively rotatable connection relationship. When fixing the bearing grinding blank, the acting force generated by the contact between the inner wall of the collar 303 and the fixing claws 202 will not affect the normal rotation motion of the rotating disc 301.

[0058] Please refer to as Figure 9 and Figure 10As shown, the elastic pulling component includes a first connecting seat 401. One end of the first connecting seat 401 is connected to one set of mounting seats 307 through a connecting pin, and a T-shaped block 402 is provided at the other end of the first connecting seat 401. On one side of the grinding block 302, there are two sets of movable blocks 403. The two sets of movable blocks 403 are respectively located on both sides of the T-shaped block 402. Four sets of buckle seats 404 are respectively provided at the corresponding ends of the T-shaped block 402 and the movable blocks 403. Two sets of pulling springs 405 are respectively connected to the corresponding four sets of buckle seats 404 to form an elastic connection, and the grinding block 302 can be pulled towards the core block 306 through the two sets of pulling springs 405. A limiting sleeve 406 is sleeved on the periphery of the T-shaped block 402. A first limiting block 407 is provided on one side of the two sets of movable blocks 403 corresponding to the limiting sleeve 406. The first limiting block 407 cooperates with the inner wall of the limiting sleeve 406 to limit the moving range of the movable block 403, ensuring that when the grinding block 302 moves under the action of centrifugal force, it maintains a stable posture and does not deviate from the predetermined track.

[0059] Please refer to as Figure 3 With Figure 4 As shown, the grinding component further includes a rotating rod 310. A connecting head 311 is provided on the top of the rotating disc 301, and a rotating rod 310 is fixedly connected to the top of the connecting head 311. A grinding motor 313 is provided on the top of the outer shell 103, and the main shaft of the grinding motor 313 is connected to the rotating rod 310 through a gear structure 314.

[0060] During grinding, the grinding motor 313 is started, and the power is transmitted to the rotating rod 310 through the gear structure 314, thereby driving the rotating disc 301 to rotate at a high speed. At this time, under the action of centrifugal force, the multiple grinding blocks 302 at the bottom of the rotating disc 301 move outward along the first sliding track 304. At the same time, the two sets of movable blocks 403 on one side of the grinding block 302 move outward along the limiting sleeve 406, so that under the action of the pulling spring 405, an inward force is given to the grinding block 302, realizing flexible contact with the inner hole of the bearing grinding blank, being able to adjust the grinding pressure according to the magnitude of the centrifugal force, avoiding defects such as chipping and cracking caused by local stress concentration of traditional rigid tools, and improving the processing quality and yield rate of graphite bearings.

[0061] Through holes 315 are correspondingly provided at the top ends of the rotating rod 310 and the connecting head 311. A connector 316 is installed in the through hole 315 at the top end of the rotating rod 310. A liquid delivery pipe 317 for delivering grinding fluid is connected to the top of the connector 316. One end of the liquid delivery pipe 317 is connected to an external device for supplying grinding fluid to form a grinding fluid delivery channel.

[0062] Please refer to as Figure 6 、 Figure 7 With Figure 8As shown, multiple groups of first flow channel plates 318 are arranged on the peripheral side of the connector 311. First conveying channels 319 are correspondingly formed between the rotating disc 301 and the multiple groups of first flow channel plates 318. The first conveying channels 319 are radial. Multiple groups of nozzles 320 are arranged at the bottom of the rotating disc 301. The multiple groups of nozzles 320 are respectively located between the multiple groups of grinding blocks 302. The multiple groups of nozzles 320 are all communicated with the first conveying channels 319. When grinding the bearing grinding blank, the grinding fluid enters the first conveying channels 319 from external equipment through the liquid delivery pipe 317 and the liquid injection holes 315, and finally is sprayed onto the surface of the bearing grinding blank through the nozzles 320, playing the roles of cooling, lubricating and chip removal.

[0063] Please refer to as Figure 8 、 Figure 9 and Figure 10 As shown, a liquid injection groove 321 is further formed at the bottom of the rotating disc 301. Multiple groups of second flow channel plates 322 are arranged at the top of the centripetal block 306. Second conveying channels 323 are formed at the tops of the multiple groups of second flow channel plates 322. An liquid outlet 324 is formed at one end of the second flow channel plate 322. A sealing pad 325 is arranged at the top of the first sliding block 305. The top of the sealing pad 325 is in contact with the liquid outlet 324, forming a dynamic sealing structure that can change with the centrifugal force. When the rotating disc 301 is stationary or rotating at a low speed, the sealing pad 325 is in close contact with the liquid outlet 324, forming a sealing structure. A guiding block 326 is arranged at one end of the first sliding block 305. Guiding grooves 327 are correspondingly formed at the tops of the guiding block 326 and one end of the sealing pad 325 corresponding to the liquid outlet 324. A grinding layer 328 is arranged on one side of the grinding block 302. A cooling flow channel 329 is formed in the grinding block 302 corresponding to the grinding layer 328. The top end of the cooling flow channel 329 is communicated with the guiding groove 327. During the initial stage of grinding, the grinding fluid is provided through the first conveying channels 319, and the internal cooling path is automatically opened as the centrifugal force increases. When the rotating disc 301 rotates at a high speed, the grinding block 302 moves outward under the action of the centrifugal force, driving the sealing pad 325 to move out of the liquid outlet 324. At this time, the liquid outlet 324 is communicated with the guiding groove 327 on the guiding block 326. The grinding fluid in the second conveying channels 323 flows into the cooling flow channel 329 in the grinding block 302 through the guiding groove 327, cooling the grinding block 302 and further cooling and recovering debris in the grinding area, realizing the reasonable distribution and efficient utilization of cooling resources. Through the arrangement of the first conveying channels 319 and the second conveying channels 323, a three-dimensional cooling structure combining internal and external is formed, effectively reducing the influence of grinding heat on the material properties, and at the same time washing and recovering the debris in time, reducing dust pollution and secondary wear.

[0064] Please refer to as Figure 11 、 Figure 12 and Figure 13As shown, multiple sets of installation through slots 203 are provided at the top of the placement disc 201. Sliding seats 204 are provided at the tops of the multiple sets of installation through slots 203. Shield plates 205 are correspondingly provided at the bottoms of the multiple sets of fixing claws 202 for the installation through slots 203. Second sliding blocks 206 are provided at the bottoms of the shield plates 205. The second sliding blocks 206 are slidably connected to the sliding seats 204. The shield plates 205 can cover the installation through slots 203 to prevent grinding fluid from leaking out through the installation through slots 203.

[0065] Anti-slip layers 207 are provided on one side of each adjacent pair of the multiple sets of fixing claws 202 to ensure reliable clamping of the bearing grinding blank; multiple sets of top blocks 208 are also provided at the top of the placement disc 201. The tops of the top blocks 208 are flush with the shield plates 205. When the bearing grinding blank is placed in the placement disc 201, the tops of the top blocks 208 are in contact with the bottom of the bearing grinding blank to support the bottom of the workpiece, so that when the fixing claws 202 are moved to fix the bearing grinding blank, it is possible to avoid direct contact between the shield plate 205 and the workpiece, which may cause interference and damage to the bearing grinding blank or the shield plate 205.

[0066] Limit plates 209 are provided on the corresponding sides of the multiple sets of fixing claws 202 corresponding to the collar 303. During the process of fixing the bearing grinding blank, the bottom end of the collar 303 contacts the limit plate 209 to ensure the coaxiality requirement between the inner hole of the bearing grinding blank and the grinding component through mechanical limitation.

[0067] Please refer to as Figure 14 And Figure 15 As shown, multiple sets of installation brackets 210 are provided at the bottom of the placement disc 201. Multiple sets of sliding grooves 211 are provided at the tops of the multiple sets of installation brackets 210. Movable plates 212 that can slide are provided in the multiple sets of sliding grooves 211. Second limit blocks 213 are provided at the tops of the movable plates 212. The second limit blocks 213 pass through the installation through slots 203 and are connected to the fixing claws 202. The movement stroke of the fixing claws 202 can be limited by the second limit blocks 213 in the installation through slots 203 to prevent the fixing claws 202 from coming out, improving stability.

[0068] Installation holes 214 are provided in the installation brackets 210. Sliding pins 215 are inserted into the installation holes 214. A convex block 216 is provided at the bottom of the movable plate 212. A through hole is provided in the convex block 216. One end of the sliding pin 215 is inserted into the through hole. A spring 217 is sleeved on the sliding pin 215. One end of the spring 217 contacts the installation bracket 210, and the other end contacts the convex block 216; after the grinding operation is completed, the collar 303 disengages from the fixing claws 202, and the spring 217 releases its elastic potential energy to push the convex block 216, driving the movable plate 212 and the fixing claws 202 to move outwards to release the clamping state of the bearing grinding blank.

[0069] Please refer to as Figure 12 And Figure 13As shown in the figure, a liquid return hole 218 is opened at the center of the bottom of the placement disc 201. The liquid return hole 218 is connected to a telescopic pipe 219, and the other end of the telescopic pipe 219 is connected to the recovery system of the external grinding fluid supply equipment, forming a grinding fluid circulation loop, prolonging the service life and reducing the operating cost.

[0070] A protective cover 220 is provided on the top of the placement disc 201. In the state of grinding the bearing blank with a fixed bearing, the collar 303 is located inside the protective cover 220, and a relatively closed processing space can be formed through the protective cover 220, the collar 303 and the mounting ring 308 to prevent the grinding fluid and debris from overflowing.

[0071] Please refer to Figure 12 As shown in the figure, second sliding tracks 221 are provided on both opposite inner side surfaces of the housing 103. Sliders 222 are provided on both groups of second sliding tracks 221. Second connecting seats 223 are provided on both sides of the placement disc 201. One side of the two groups of second connecting seats 223 is respectively connected to the two groups of sliders 222. Through the arrangement of the two groups of second sliding tracks 221, the up and down movement of the placement disc 201 can be guided;

[0072] Two hydraulic cylinders 224 are provided at the bottom of the mounting plate 101. The tops of the two hydraulic cylinders 224 are respectively connected to the two groups of second connecting seats 223. Through the telescopic movement of the hydraulic cylinders 224, the lifting height of the placement disc 201 can be controlled, the contact linkage between the collar 303 and the fixed claws 202 can be realized, and the automatic clamping and loosening operations of the bearing grinding blank can be completed.

[0073] The specific usage method and function of this embodiment: When using this grinding device, first place the bearing grinding blank at the central position on the top of the placement disc 201, and start the two hydraulic cylinders 224 at the bottom of the mounting plate 101. The piston rods of the hydraulic cylinders 224 drive the placement disc 201 to move upward along the second sliding tracks 221 on the inner side surface of the housing 103 through the second connecting seats 223. When the placement disc 201 rises to a predetermined position, the inner side of the collar 303 contacts the fixed claws 202 and applies a thrust, pushing the multiple radially distributed fixed claws 202 to tighten synchronously along the sliding seat 204. The anti-slip layer 207 on the adjacent side of the fixed claws 202 is closely attached to the outer side of the bearing grinding blank to form a stable clamping; at the same time, the bottom end of the collar 303 contacts the limit plate 209 on the fixed claws 202 to ensure that the inner hole of the bearing grinding blank is coaxial with the rotation axis of the rotating disc 301.

[0074] Start the grinding motor 313. The main shaft of the grinding motor 313 drives the rotating rod 310 to rotate through the gear structure 314. The rotating rod 310 drives the rotating disc 301 to rotate at high speed through the connector 311. Under the action of centrifugal force, the grinding block 302 at the bottom of the rotating disc 301 moves outward along the first sliding track 304 through the first slider 305. At the same time, two groups of movable blocks 403 on one side of the grinding block 302 slide outward along the limit sleeve 406 to stretch the pulling spring 405. The centripetal pulling force generated by the pulling spring 405 interacts with the centrifugal force, so that the grinding block 302 fits the inner hole surface of the bearing grinding blank in a flexible contact manner. As the rotation speed of the rotating disc 301 changes, the grinding pressure is automatically adjusted. Through the flexible contact between the grinding block 302 and the inner hole of the bearing grinding blank, the problem of easy edge chipping during the grinding of graphite materials is solved, and the stability of the processing process and the quality of the finished product are ensured.

[0075] During the grinding process, the external grinding fluid supply device transports the grinding fluid to the first delivery channel 319 through the infusion pipe 317, the connector 316, and the infusion holes 315 in the rotating rod 310 and the connector 311. The grinding fluid is sprayed onto the surface of the bearing grinding blank through the nozzle 320 at the bottom of the rotating disc 301 for preliminary cooling, lubrication, and chip removal. When the rotation speed of the rotating disc 301 reaches the set threshold, the grinding block 302 moves further outward under the action of centrifugal force, driving the sealing pad 325 at the top of the first slider 305 out of the liquid outlet 324, so that the second delivery channel 323 is communicated with the diversion groove 327. At this time, the grinding fluid flows into the cooling channel 329 in the grinding block 302 through the second delivery channel 323 and the diversion groove 327 to cool the grinding layer 328 internally, and further wash the grinding area. The debris is recovered to the external device together with the grinding fluid through the liquid return hole 218 and the telescopic pipe 219 at the bottom of the placement disc 201. The protective cover 220, the collar 303, and the mounting ring 308 form a closed processing space to prevent chip splashing.

[0076] After the grinding operation is completed, the hydraulic cylinder 224 drives the placement disc 201 to descend, and the collar 303 disengages from the fixed claw 202. The spring 217 on the mounting bracket 210 releases its elastic potential energy, pushing the convex block 216 at the bottom of the movable plate 212, and driving the fixed claw 202 to move outward along the sliding seat 204 through the second limit block 213 to release the clamping of the bearing grinding blank, and then the processed graphite bearing can be taken out.

[0077] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A graphite bearing inner hole grinding device, comprising a mounting plate (101) and an equipment box (102), characterized in that: The equipment box (102) is provided at the bottom of the mounting plate (101), and a bearing grinding blank placing component is provided at the top of the mounting plate (101); The bearing grinding blank placing component includes a placing disc (201) that can move up and down. The placing disc (201) is provided above the mounting plate (101). A plurality of fixing claws (202) for clamping the bearing grinding blank are provided at the top of the placing disc (201), and the plurality of fixing claws (202) are radially distributed; A housing (103) is provided at the top of the mounting plate (101). A grinding component is provided inside the housing (103). The grinding component includes a rotating disc (301) and a plurality of grinding blocks (302) for grinding the inner hole of the bearing grinding blank. The rotating disc (301) is rotatably provided inside the housing (103). A plurality of the grinding blocks (302) are slidably provided at the bottom of the rotating disc (301), and the plurality of grinding blocks (302) are also radially distributed. A rotatable collar (303) is further provided at the bottom of the rotating disc (301). In the state of fixing the bearing grinding blank, the inner sides of the collar (303) are in contact with the plurality of fixing claws (202).

2. The inner hole grinding device for a graphite bearing according to claim 1, characterized in that: A plurality of first sliding tracks (304) are provided at the bottom of the rotating disc (301) corresponding to the plurality of grinding blocks (302). First sliding blocks (305) are provided at the tops of the plurality of grinding blocks (302), and the plurality of first sliding blocks (305) are respectively slidably connected to the plurality of first sliding tracks (304); A centripetal block (306) is provided at the central position of the bottom of the rotating disc (301). A plurality of mounting seats (307) are provided on the periphery of the centripetal block (306) corresponding to the plurality of grinding blocks (302). The plurality of mounting seats (307) are respectively connected to the plurality of grinding blocks (302) through a plurality of elastic pulling components; An installation ring (308) is further provided at the bottom of the rotating disc (301). A rotating groove (309) is formed inside the installation ring (308), and the collar (303) is rotatably installed in the rotating groove (309).

3. The inner hole grinding device for a graphite bearing according to claim 2, characterized in that: The elastic pulling component includes a first connecting seat (401). One end of the first connecting seat (401) is connected to one of the mounting seats (307) through a connecting pin, and a T-shaped block (402) is provided at the other end of the first connecting seat (401); Two movable blocks (403) are provided on one side of the grinding block (302). The two movable blocks (403) are respectively located on both sides of the T-shaped block (402). Four buckle seats (404) are respectively provided at one ends of the T-shaped block (402) and the two movable blocks (403). Two pulling springs (405) are respectively provided between the four buckle seats (404); A limiting sleeve (406) is sleeved on the periphery of the T-shaped block (402), and first limiting blocks (407) are arranged corresponding to the limiting sleeve (406) on one side of each of the two groups of movable blocks (403).

4. The inner hole grinding device for a graphite bearing according to claim 2, wherein: The grinding assembly further includes a rotating rod (310). A connecting head (311) is arranged on the top of the rotating disc (301), the rotating rod (310) is arranged on the top of the connecting head (311), a grinding motor (313) is arranged on the top of the housing (103), and the main shaft of the grinding motor (313) is connected to the rotating rod (310) through a gear structure (314); Penetrating infusion holes (315) are respectively formed at the top ends of the rotating rod (310) and the connecting head (311). A joint (316) is installed in the infusion hole (315) at the top end of the rotating rod (310). An infusion pipe (317) for conveying grinding fluid is connected to the top of the joint (316), and one end of the infusion pipe (317) is connected to an external device for supplying grinding fluid.

5. The inner hole grinding device for a graphite bearing according to claim 4, wherein: A plurality of groups of first flow channel plates (318) are arranged on the periphery of the connecting head (311). First conveying channels (319) are respectively formed between the rotating disc (301) and the plurality of groups of first flow channel plates (318). The first conveying channels (319) are radially arranged. A plurality of groups of nozzles (320) are arranged at the bottom of the rotating disc (301). The plurality of groups of nozzles (320) are respectively located between the plurality of groups of grinding blocks (302), and the plurality of groups of nozzles (320) are all communicated with the first conveying channels (319).

6. The inner hole grinding device for a graphite bearing according to claim 5, wherein: An infusion groove (321) is further formed at the bottom of the rotating disc (301). A plurality of groups of second flow channel plates (322) are arranged on the top of the centripetal block (306). Second conveying channels (323) are respectively formed on the tops of the plurality of groups of second flow channel plates (322). An liquid outlet (324) is formed at one end of the second flow channel plate (322). A sealing pad (325) is arranged on the top of the first sliding block (305). The top of the sealing pad (325) is in contact with the liquid outlet (324). A diversion block (326) is arranged at one end of the first sliding block (305). Diversion grooves (327) are respectively formed at the top of the diversion block (326) and one end of the sealing pad (325) corresponding to the liquid outlet (324). A grinding layer (328) is arranged on one side of the grinding block (302). A cooling flow channel (329) is formed in the grinding block (302) corresponding to the grinding layer (328), and the top end of the cooling flow channel (329) is communicated with the diversion groove (327).

7. The inner hole grinding device for a graphite bearing according to claim 1, wherein: The top of the placement disc (201) is provided with a plurality of groups of installation slots (203), the tops of the plurality of groups of installation slots (203) are all provided with sliding seats (204), the bottoms of the plurality of groups of fixed claws (202) are all provided with shielding plates (205) corresponding to the installation slots (203), the bottoms of the shielding plates (205) are all provided with second sliding blocks (206), and the second sliding blocks (206) are slidably connected to the sliding seats (204); The adjacent sides of the plurality of groups of fixing claws (202) are all provided with anti-skid layers (207), and the top of the placement disc (201) is also provided with a plurality of groups of top blocks (208), and the top of the top block (208) is flush with the shielding plate (205); A limiting plate (209) is provided on one side corresponding to each of the plurality of groups of the fixing claws (202) and corresponding to the collar (303).

8. A graphite bearing inner hole grinding device according to claim 7, characterized in that: A plurality of mounting brackets (210) are arranged at the bottom of the placement disc (201), a slide groove (211) is provided on the top of each of the plurality of mounting brackets (210), a movable plate (212) is provided in each of the plurality of slide grooves (211), a second limiting block (213) is provided on the top of each of the movable plates (212), and the second limiting block (213) can slide through the mounting slot (203) to be connected to the fixing claw (202); The mounting bracket (210) is provided with a mounting hole (214), a sliding pin shaft (215) is passed through the mounting hole (214), a convex block (216) is provided at the bottom of the movable plate (212), a through hole is provided on the convex block (216), one end of the sliding pin shaft (215) is passed through the through hole, a spring (217) is sleeved on the sliding pin shaft (215), one end of the spring (217) is in contact with the mounting bracket (210), and the other end is in contact with the convex block (216).

9. The graphite bearing inner hole grinding device according to claim 1, characterized in that: A liquid return hole (218) is provided at the center of the bottom of the placement disc (201); the bottom end of the liquid return hole (218) is connected to one end of a telescopic tube (219); the other end of the telescopic tube (219) is connected to an external grinding fluid supply device through a pipeline; A protective cover (220) is arranged on the top of the placement disc (201), and a sleeve ring (303) is located inside the protective cover (220) when the bearing grinding blank is fixed.

10. The graphite bearing inner hole grinding device according to claim 1, characterized in that: Second sliding rails (221) are disposed on two opposite inner side surfaces of the housing (103), and two groups of the second sliding rails (221) are disposed on sliders (222). Second connecting seats (223) are disposed on both sides of the placement disc (201), and one side of the two groups of the second connecting seats (223) is respectively connected to the two groups of the sliders (222); Two hydraulic cylinders (224) are arranged at the bottom of the mounting plate (101), and the tops of the two hydraulic cylinders (224) are respectively connected to the two second connecting seats (223).

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