A polishing device for the production of motor shafts

Abstract

The present invention provides a polishing device for the production of motor shafts, belonging to the technical field of motor shaft processing, and is used to solve the technical problems that the existing polishing devices have low polishing efficiency and difficult to guarantee the polishing quality when polishing motor shafts. It includes a workbench, a rotating cylinder is rotatably arranged above the workbench, the upper end of the rotating cylinder is threadedly connected with a sealing cover, a power mechanism and an air extraction mechanism are arranged below the workbench, a plurality of fixed pipes are connected to the side wall of the rotating cylinder, an extension rod, a contraction pipe and a reverse transmission mechanism are arranged in the fixed pipe, a polishing head is connected to the outer end of the extension rod, a soft shell is arranged inside the rotating cylinder, and a vertical clamping mechanism is arranged on the workbench; The present invention can adjust the positions of each polishing head so that each polishing head exactly fits the surface of the motor shaft, adapts to the diameter change of the motor shaft, enables the polishing of the motor shaft to be completed at one time, while improving the polishing efficiency, avoiding uneven polishing caused by segmented polishing, and improving the polishing quality.

Description

Technical Field

[0001] The present invention belongs to the technical field of motor shaft processing and relates to a polishing device for motor shaft production. Background Art

[0002] Polishing refers to a processing method that uses mechanical, chemical, or electrochemical action to reduce the surface roughness of a workpiece to obtain a bright and flat surface. It is a finishing process that uses a polishing tool and abrasive particles or other polishing media to modify the surface of the workpiece. Polishing cannot improve the dimensional accuracy or geometric shape accuracy of the workpiece, but aims to obtain a smooth surface or mirror gloss. Sometimes it is also used to eliminate gloss (matting). Usually, a polishing wheel is used as the polishing tool.

[0003] After retrieval, as disclosed in a Chinese patent document, a surface polishing device for a motor shaft [Application No.: CN202122650316.3; Publication No.: CN216577247U]. This surface polishing device for a motor shaft includes a polishing plate and a polishing mechanism; the polishing mechanism is arranged above the polishing plate; the polishing mechanism includes an adjusting cylinder, a fixed cylinder, a connecting pipe, a first polishing block, and a second polishing block; the adjusting cylinder is movably connected to the top of the polishing plate; during use, the operator needs to rotate the adjusting cylinder, insert one end of the motor shaft into the connecting pipe, then reset the adjusting cylinder, adjust the length of the inserted end of the motor shaft in the connecting pipe so that the other end enters into the first polishing block and the second polishing block, and finally start the polishing motor to drive the connecting pipe and the motor shaft to rotate to polish one end of the motor shaft. Then, the operator can move the first polishing block up and down to change the pressure of the first polishing block on the motor shaft, thereby facilitating the operator to adjust the polishing degree of the motor shaft surface.

[0004] However, this polishing device can only polish a part of the motor shaft. When the outer surface of the motor shaft needs to be polished as a whole, not only the position of the motor shaft needs to be adjusted repeatedly, but also the polishing blocks of the polishing device need to be adjusted according to the thickness of different positions of the motor shaft. The process is cumbersome, and it is difficult to ensure the same polishing degree for multiple segments during segmented polishing of the motor shaft surface, resulting in low polishing efficiency and quality of the motor shaft.

[0005] Based on this, we have designed a polishing device for motor shaft production with high polishing efficiency and good polishing quality. Summary of the Invention

[0006] The object of the present invention is to address the above problems existing in the prior art and propose a polishing device for motor shaft production. The technical problem to be solved by this device is: how to improve the surface polishing efficiency and quality of the motor shaft.

[0007] The object of the present invention can be achieved by the following technical solutions:

[0008] A polishing device for the production of motor shafts, comprising a workbench. An installation groove is formed above the workbench. A rotating cylinder is rotatably arranged in the installation groove through a thrust bearing. The lower end of the rotating cylinder is sealed, and a sealing cover is threadedly connected to the upper end of the rotating cylinder. A connecting cylinder is fixed to the lower end of the rotating cylinder, and a power mechanism for driving the connecting cylinder to rotate is provided below the workbench. An air extraction mechanism for extracting the gas inside the rotating cylinder is arranged inside the connecting cylinder. A plurality of fixed pipes distributed in a spiral manner are connected to the side wall of the rotating cylinder. The inside of the fixed pipe is communicated with the inside of the rotating cylinder. An extension rod and a contraction pipe are slidably arranged in the fixed pipe. A reverse transmission mechanism is arranged between the extension rod and the contraction pipe. One end of the outer side of the extension rod is connected with a polishing head. A soft shell is arranged inside the rotating cylinder. The soft shell is cylindrical, and the upper and lower ends of the soft shell are respectively fixed to the upper and lower ends of the rotating cylinder. One end of the contraction pipe is fixed to the outer wall of the soft shell. A conical support column is fixed inside the bottom of the rotating cylinder. A chute is formed on the workbench, and a vertical clamping mechanism for clamping the motor shaft is arranged in the chute.

[0009] The working principle of the present invention is as follows: Before polishing, the operator places a motor shaft of the same batch to be processed inside the soft shell, and presses the process hole at one end of the motor shaft against the top of the conical support column. Then, the sealing cover is covered, and the air inside the soft shell is pumped away through the air extraction mechanism, so that the soft shell is recessed inward and fits on the inner motor shaft. At this time, the soft shell will drive the contraction pipe to contract into the fixed pipe. And according to the different diameters at different positions of the motor shaft, the moving distance of the contraction pipe is different. When the contraction pipe contracts into the rotating cylinder, it will drive the corresponding extension rod and polishing head to extend outward through the corresponding reverse transmission mechanism. Moreover, the moving distance of the contraction pipe is the same as the moving distance of its corresponding extension rod. During polishing, the operator needs to fix the motor shaft to be processed on the vertical clamping mechanism, and then move the motor shaft close to the rotating cylinder through the chute. The rotating cylinder rotates under the drive of the power mechanism, and the motor shaft to be processed rotates under the drive of the vertical clamping mechanism. At this time, the polishing surfaces formed by the rotation of several polishing heads can just fit the surface of the motor shaft to be processed, and cooperate with the rotation of the motor shaft to polish the surface of the motor shaft, so that the outer surface of the motor shaft is polished once, improving the polishing efficiency while avoiding the problem of uneven polishing caused by segmented polishing and improving the polishing quality.

[0010] The power mechanism includes a driving gear and a driven gear fixed to the outer wall of the connecting cylinder. An installation frame is fixed to the lower surface of the workbench, and a power motor is fixed on the installation frame. The driving gear is fixed to the output shaft of the power motor, and the driving gear meshes with the driven gear.

[0011] With the above structure, the power motor drives the connecting cylinder and the rotating cylinder to rotate through the meshing between the driving gear and the driven gear.

[0012] The reverse transmission mechanism includes a transmission piston. The contraction tube is slidably arranged in the fixed tube, and the extension rod is slidably arranged in the contraction tube. A first sealing ring is embedded on the outer side of the end of the contraction tube away from the soft shell, and the first sealing ring abuts against the inner wall of the fixed tube. The transmission piston is slidably arranged inside the contraction tube, and one end of the extension rod is fixedly connected to the transmission piston. A round hole is opened at the end of the fixed tube away from the rotating cylinder. The other end of the extension rod passes through the round hole and is connected to the polishing head, and a second sealing ring is embedded on the inner wall of the round hole, and the second sealing ring abuts against the extension rod. A plurality of air holes are opened on the side wall of the contraction tube close to the soft shell, and an air inlet hole is opened on the rotating cylinder.

[0013] With the above structure, when the soft shell folds and contracts inward, the outside air fills the space between the soft shell and the rotating cylinder through the air inlet hole, so that the air pressure in the space between the soft shell and the rotating cylinder is the same as the outside air pressure. At this time, the soft shell drives the contraction tube to contract. The internal space of the contraction tube is divided into two parts by the transmission piston. At this time, the internal space of the contraction tube close to the air holes is communicated with the space between the soft shell and the rotating cylinder through the air holes and keeps the air pressure the same, while the air pressure in the internal space of the contraction tube close to the extension rod gradually decreases as the contraction tube moves. At this time, the air pressures at both ends of the transmission piston are inconsistent, and the pressure difference will drive the transmission piston and the extension rod to extend outward, and the polishing head follows the extension rod to extend outward synchronously. As the soft shell contracts and fits the outer surface of the internal motor shaft, the extension rod extends outward by different distances, so as to match the outer surface of the motor shaft and realize synchronous grinding of the outer surface of the motor shaft.

[0014] The air extraction mechanism includes an air extraction piston slidably arranged inside the connection cylinder. The lower end of the air extraction piston is fixed with an air extraction rod. A return spring is arranged inside the connection cylinder, and both ends of the return spring abut against the bottom of the rotating cylinder and the upper end of the air extraction piston respectively. A plurality of first one-way valves are installed on the bottom side wall of the rotating cylinder, and a plurality of second one-way valves are installed on the air extraction piston.

[0015] With the above structure, the operator can pull the air extraction piston downward through the air extraction rod. At this time, the gas inside the soft shell enters the connection cylinder through the first one-way valve, and then the return spring drives the air extraction piston to reset upward. At this time, the gas inside the connection cylinder is discharged to the outside through the second one-way valve. After repeating, the gas inside the soft shell can be discharged.

[0016] The bottom of the connection cylinder is fixed with a fixed disk. A plurality of through holes are evenly distributed in a circle on the fixed disk, and a perforation is opened in the middle of the fixed disk. The air extraction rod passes through the perforation. A threaded sleeve is opened at the bottom of the air extraction piston. One end of the air extraction rod is fixed with a stepping ring, and the other end of the air extraction rod is threadedly connected to the threaded sleeve. A groove is opened on one side of the workbench close to the rotating cylinder, and a detachable protective rod is arranged at the opening of the groove, and a threaded groove is opened on the inner wall of the groove.

[0017] With the above structure, the operator can remove the detachable protective rod, then approach the rotating cylinder and step on the stepping ring downward with the foot, which is more labor-saving. After the air extraction is completed, the air extraction rod can be disassembled and its end can be threadedly connected to the threaded groove, which is convenient for storage. Moreover, it can prevent the stepping ring from rotating with the rotating cylinder and winding wires, etc. During polishing, the detachable protective rod can be reinstalled to prevent the staff from getting scratched when approaching the rotating cylinder.

[0018] The vertical clamping mechanism includes a sliding seat slidably arranged in the sliding groove and a locking component for fixing the position of the sliding seat. A rotating hole is formed in the sliding seat, a conical base is rotatably arranged in the rotating hole, and a clamping motor for driving the conical base to rotate is fixed at the lower end of the sliding seat. An installation hole is formed in the sliding seat, a fixed sleeve is fixed in the installation hole, a vertical rod is slidably inserted in the fixed sleeve, and a plurality of fastening bolts for fixing the vertical rod are arranged on the side wall of the fixed sleeve. The upper end of the vertical rod is fixed with a lifting sleeve, the upper end of the lifting sleeve is fixed with a cover plate, and a lifting block is slidably arranged inside the lifting sleeve. A downward pressure spring is arranged inside the lifting sleeve, and both ends of the downward pressure spring abut against the cover plate and the lifting block respectively. The lower end of the lifting block is rotatably arranged with a conical ejector rod through a bearing.

[0019] With the above structure, during use, the operator can slide the sliding seat to the edge position, then make the upper process hole of the motor shaft to be processed abut against the conical ejector rod, push the conical ejector rod upward and compress the downward pressure spring, and then align the lower process hole of the motor shaft to be processed with the conical base. Under the action of the downward pressure spring, the motor shaft can be clamped. After fixing the motor shaft, the operator can first push the sliding seat in the direction close to the rotating cylinder and position it by the locking component, and then drive the conical base to rotate by the clamping motor, thereby driving the motor shaft to rotate for surface polishing. In addition, the operator can adjust the position of the vertical rod according to the length of the motor shaft to achieve the effect of fixing motor shafts of different lengths.

[0020] The locking component includes a sliding rod, an iron block and an electromagnet. A sliding hole is formed in the inner wall of the sliding groove close to the rotating cylinder, and the sliding rod is slidably arranged in the sliding hole. A threaded hole is formed on the upper surface of the workbench, the bottom of the threaded hole communicates with the sliding hole, and a threaded column is threadedly connected in the threaded hole. The bottom of the threaded column abuts against the sliding rod, and a rotating handle is fixed at the upper end of the threaded column. The iron block is fixed at the end of the sliding rod, and the electromagnet is fixed on one side of the sliding seat close to the rotating cylinder.

[0021] With the above structure, the operator can adjust the position of the sliding rod according to the diameter of the motor shaft and fix it with the threaded column. When the sliding seat moves closer to the rotating cylinder, the electromagnet fits with the iron block. At this time, the electromagnet is turned on to fix the position of the sliding seat. After the motor shaft is polished, the electromagnet is turned off, and the sliding seat can be slid to the edge position of the workbench to facilitate loading and unloading.

[0022] The sealing cover is provided with small holes, and sealing gaskets are arranged in the small holes. Sealing plugs are inserted into the small holes, and the upper ends of the conical support columns are made of magnets.

[0023] With the above structure, when the motor shaft is placed into the soft shell, for some motor shafts that can be adsorbed by magnets, it is easier to align the process hole at the bottom of the motor shaft with the conical support column. When the motor shaft inside the soft shell needs to be replaced, the sealing cover needs to be opened. At this time, the sealing plug can be removed first to allow external air to enter the soft shell. At this time, the air pressure inside and outside the sealing cover is the same, making it easier to open.

[0024] The polishing head includes a bolt base, a brush holder, and several polishing bristles. The polishing bristles are fixed on the brush holder, the bolt base is fixed at the end of the extension rod, and the brush holder is threadedly connected to the bolt base.

[0025] With the above structure, for the polishing of the same batch of motor shafts, the polishing heads at the positions where the diameters of the corresponding motor shafts change are more likely to be worn. The operator can replace the severely worn polishing bristles separately, reducing the replacement cost.

[0026] Several fixing strips are arranged inside the soft shell, and the fixing strips are fixed on the inner wall of the rotating cylinder through bolts, and the fixing strips are diverged from the fixing pipe.

[0027] With the above structure, when the soft shell wrinkles and contracts, under the action of the fixing strips, the concave position of the soft shell matches the position of the fixing pipe, preventing the rest of the soft shell from being concave and folding between the fixing pipe and the motor shaft, resulting in the position where the soft shell is aligned with the fixing pipe not contracting in place, and further ensuring that the distances between each polishing head and the outer wall of the motor shaft being polished are consistent, further improving the polishing effect.

[0028] Compared with the prior art, the polishing device for motor shaft production has the following advantages:

[0029] 1. Through the rotating cylinder, the soft shell, the extension rod, the contraction tube, and the reverse transmission mechanism, the positions of each polishing head can be adjusted so that each polishing head exactly fits the surface of the motor shaft, adapting to the diameter change of the motor shaft, enabling the polishing of the motor shaft to be completed at one time. While improving the polishing efficiency, it avoids the problem of uneven polishing caused by segmented polishing and improves the polishing quality.

[0030] 2. Through the reverse transmission mechanism, the reverse movement between the extension rod and the contraction tube can be realized, with a simple structure and low assembly and production costs.

[0031] 3. Through the air extraction mechanism, the gas inside the soft shell can be pumped out, and the operation is convenient and labor-saving. The opening difficulty of the sealing cover is reduced through the sealing plug, facilitating the operation of the operator.

[0032] 4. Through the fixing strip, prevent the rest of the soft shell from being concave and folding between the fixed tube and the motor shaft, which may cause the position where the soft shell aligns with the fixed tube to shrink insufficiently. Ensure that the distances between each polishing head and the outer wall of the motor shaft being polished are consistent, further improving the polishing effect. Brief Description of the Drawings

[0033] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0034] Figure 2 is a structural schematic diagram of the power mechanism in the present invention;

[0035] Figure 3 is an upper-end structural schematic diagram of the rotating cylinder in the present invention;

[0036] Figure 4 is a structural schematic diagram of the sealing cover in the present invention;

[0037] Figure 5 is a structural schematic diagram of the reverse transmission mechanism in the present invention;

[0038] Figure 6 is a structural schematic diagram of the air extraction mechanism in the present invention;

[0039] Figure 7 is a partial structural schematic diagram of the air extraction mechanism in the present invention;

[0040] Figure 8 is a structural schematic diagram of the vertical clamping mechanism in the present invention;

[0041] Figure 9 is a structural schematic diagram of the locking component in the present invention;

[0042] Figure 10 is a sectional structural schematic diagram of the lifting sleeve in the present invention;

[0043] In the figure: 1, workbench; 101, groove; 102, threaded groove; 103, detachable protective rod; 2, mounting groove; 3, rotating cylinder; 4, connecting cylinder; 5, power mechanism; 501, driving gear; 502, mounting bracket; 503, power motor; 504, driving gear; 6, fixed pipe; 7, extension rod; 8, shrinkage pipe; 9, reverse transmission mechanism; 901, first sealing ring; 902, transmission piston; 903, air vent hole; 904, air inlet hole; 10, soft shell; 11, sealing cover; 1101, small hole; 1102, sealing gasket; 1103, sealing plug; 12, polishing head; 1201, bolt base; 1202, brush holder; 1203, polishing brush; 13, conical support column; 14, air extraction mechanism; 1401, air extraction piston; 1402, return spring; 1403, air extraction rod; 1404, first one-way valve; 1405, second one-way valve; 1406, threaded sleeve; 1407, stepping ring; 1408, fixed disk; 15, sliding groove; 16, vertical clamping mechanism; 1601, sliding seat; 1602, rotating hole; 1603, conical base; 1604, clamping motor; 1605, fixed sleeve; 1606, vertical rod; 1607, fastening bolt; 1608, lifting sleeve; 1609, cover plate; 1610, lifting block; 1611, downward pressure spring; 1612, conical ejector rod; 1613, sliding hole; 1614, threaded hole; 1615, sliding rod; 1616, iron block; 1617, threaded column; 1618, rotating handle; 1619, electromagnet; 17, fixing strip. Detailed implementation mode

[0044] The technical solution of this patent will be further described in detail below in combination with the specific implementation mode.

[0045] The embodiments of this patent are described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain this patent and should not be construed as a limitation of this patent.

[0046] In the description of this patent, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this patent.

[0047] In the description of this patent, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "linkage", and "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0048] Please refer to Figures 1-10 , this embodiment provides a polishing device for the production of motor shafts, including a workbench 1. An installation groove 2 is opened above the workbench 1. A rotating cylinder 3 is rotatably arranged in the installation groove 2 through a thrust bearing. The lower end of the rotating cylinder 3 is sealed, and a sealing cover 11 is threadedly connected to the upper end of the rotating cylinder 3. A connecting cylinder 4 is fixed to the lower end of the rotating cylinder 3. A power mechanism 5 for driving the connecting cylinder 4 to rotate is arranged below the workbench 1. An air extraction mechanism 14 for extracting the gas inside the rotating cylinder 3 is arranged inside the connecting cylinder 4. A plurality of fixed pipes 6 distributed in a spiral manner are connected to the side wall of the rotating cylinder 3. The inside of the fixed pipe 6 is communicated with the inside of the rotating cylinder 3. An extension rod 7 and a contraction pipe 8 are slidably arranged in the fixed pipe 6. A reverse transmission mechanism 9 is arranged between the extension rod 7 and the contraction pipe 8. One end of the outer side of the extension rod 7 is connected with a polishing head 12. A soft shell 10 is arranged inside the rotating cylinder 3. The soft shell 10 is cylindrical, and the upper and lower ends of the soft shell 10 are respectively fixedly connected to the upper and lower ends of the rotating cylinder 3. One end of the contraction pipe 8 is fixed to the outer wall of the soft shell 10. A conical support column 13 is fixed inside the bottom of the rotating cylinder 3. A sliding groove 15 is opened on the workbench 1. A vertical clamping mechanism 16 for clamping the motor shaft is arranged in the sliding groove 15; before polishing, the operator places a motor shaft of the same batch to be processed inside the soft shell 10, and presses the process hole at one end of the motor shaft against the top of the conical support column 13, then covers the sealing cover 11, and then extracts the air inside the soft shell 10 through the air extraction mechanism 14, so that the soft shell 10 is recessed inward and fits on the inner motor shaft. At this time, the soft shell 10 will drive the contraction pipe 8 to contract into the fixed pipe 6. According to the different diameters at different positions of the motor shaft, the moving distance of the contraction pipe 8 is different. When the contraction pipe 8 contracts into the rotating cylinder 3, it will drive the corresponding extension rod 7 and polishing head 12 to extend outward through the corresponding reverse transmission mechanism 9, and the moving distance of the contraction pipe 8 is the same as the moving distance of its corresponding extension rod 7. During polishing, the operator needs to fix the motor shaft to be processed on the vertical clamping mechanism 16, and then move the motor shaft close to the rotating cylinder 3 through the sliding groove 15. The rotating cylinder 3 rotates under the drive of the power mechanism 5, and the motor shaft to be processed rotates under the drive of the vertical clamping mechanism 16. At this time, the polishing surfaces formed by the rotation of several polishing heads 12 can just fit the surface of the motor shaft to be processed, and cooperate with the rotation of the motor shaft to polish the surface of the motor shaft, so that the outer surface of the motor shaft is polished at one time, while improving the polishing efficiency, avoiding the problem of uneven polishing caused by segmented polishing, and improving the polishing quality.

[0049] The power mechanism 5 includes a driving gear 504 and a driven gear 501 fixed to the outer wall of the connecting cylinder 4. An installation bracket 502 is fixed to the lower surface of the workbench 1, and a power motor 503 is fixed to the installation bracket 502. The driving gear 504 is fixed to the output shaft of the power motor 503, and the driving gear 504 meshes with the driven gear 501; the power motor 503 drives the connecting cylinder 4 and the rotating cylinder 3 to rotate through the meshing between the driving gear 504 and the driven gear 501.

[0050] The reverse transmission mechanism 9 includes a transmission piston 902. The contraction tube 8 is slidably arranged in the fixed tube 6, and the extension rod 7 is slidably arranged in the contraction tube 8. A first sealing ring 901 is embedded on the outer side of the end of the contraction tube 8 away from the soft shell 10, and the first sealing ring 901 abuts against the inner wall of the fixed tube 6. The transmission piston 902 is slidably arranged inside the contraction tube 8, and one end of the extension rod 7 is fixedly connected to the transmission piston 902. A round hole is opened at the end of the fixed tube 6 away from the rotating cylinder 3, and the other end of the extension rod 7 passes through the round hole and is connected to the polishing head 12. A second sealing ring is embedded on the inner wall of the round hole, and the second sealing ring abuts against the extension rod 7. A plurality of air holes 903 are opened on the side wall of the contraction tube 8 close to the soft shell 10, and an air inlet hole 904 is opened on the rotating cylinder 3; when the soft shell 10 folds and contracts inwardly, external gas fills between the soft shell 10 and the rotating cylinder 3 through the air inlet hole 904, so that the air pressure in the space between the soft shell 10 and the rotating cylinder 3 is the same as the external air pressure. At this time, the soft shell 10 drives the contraction tube 8 to contract. The internal space of the contraction tube 8 is divided into two parts by the transmission piston 902. At this time, the internal space of the contraction tube 8 close to the air holes 903 is communicated with the space between the soft shell 10 and the rotating cylinder 3 through the air holes 903 and keeps the air pressure the same, while the air pressure in the internal space of the contraction tube 8 close to the extension rod 7 gradually decreases as the contraction tube 8 moves. At this time, the air pressures at both ends of the transmission piston 902 are inconsistent, and the pressure difference will drive the transmission piston 902 and the extension rod 7 to extend outward. The polishing head 12 extends outward synchronously with the extension rod 7. As the soft shell 10 contracts and fits the outer surface of the internal motor shaft, the extension rod 7 extends outward by different distances, so as to match the outer surface of the motor shaft and realize synchronous grinding of the outer surface of the motor shaft.

[0051] The air extraction mechanism 14 includes an air extraction piston 1401 slidably arranged inside the connecting cylinder 4. A lower end of the air extraction piston 1401 is fixed with an air extraction rod 1403. A return spring 1402 is arranged inside the connecting cylinder 4, and two ends of the return spring 1402 respectively abut against the bottom of the rotating cylinder 3 and the upper end of the air extraction piston 1401. A plurality of first one-way valves 1404 are installed on a bottom side wall of the rotating cylinder 3, and a plurality of second one-way valves 1405 are installed on the air extraction piston 1401. An operator can pull the air extraction piston 1401 downward through the air extraction rod 1403. At this time, the gas inside the soft shell 10 enters the connecting cylinder 4 through the first one-way valves 1404. Then, the return spring 1402 drives the air extraction piston 1401 to reset upward. At this time, the gas inside the connecting cylinder 4 is discharged to the outside through the second one-way valves 1405. After repeating this process, the gas inside the soft shell 10 can be discharged.

[0052] A fixed disk 1408 is fixed at the bottom of the connecting cylinder 4. A plurality of through holes evenly distributed in a circumferential direction are formed in the fixed disk 1408, and a through hole is formed in the middle of the fixed disk 1408. The air extraction rod 1403 passes through the through hole. A threaded sleeve 1406 is formed at the bottom of the air extraction piston 1401. One end of the air extraction rod 1403 is fixed with a stepping ring 1407, and the other end of the air extraction rod 1403 is in threaded connection with the threaded sleeve 1406. A groove 101 is formed on one side of the workbench 1 close to the rotating cylinder 3, and a detachable protective rod 103 is arranged at an opening of the groove 101, and a threaded groove 102 is formed on an inner wall of the groove 101. An operator can remove the detachable protective rod 103, then approach the rotating cylinder 3 and step on the stepping ring 1407 downward with a foot, which is more labor-saving. Moreover, after the air extraction is completed, the air extraction rod 1403 can be disassembled and its end is in threaded connection with the threaded groove 102, which is convenient for storage and can prevent the stepping ring 1407 from rotating with the rotating cylinder 3 and winding wires, etc. During polishing, the detachable protective rod 103 can be reinstalled to prevent a worker from approaching the rotating cylinder 3 and being scratched.

[0053] The vertical clamping mechanism 16 includes a sliding seat 1601 slidably arranged in the chute 15 and a locking component for fixing the position of the sliding seat 1601. A rotating hole 1602 is formed in the sliding seat 1601, and a conical base 1603 is rotatably arranged in the rotating hole 1602. A clamping motor 1604 for driving the conical base 1603 to rotate is fixed at the lower end of the sliding seat 1601. An installation hole is formed in the sliding seat 1601, and a fixed sleeve 1605 is fixed in the installation hole. A vertical rod 1606 is slidably inserted into the fixed sleeve 1605, and a plurality of fastening bolts 1607 for fixing the vertical rod 1606 are arranged on the side wall of the fixed sleeve 1605. An elevating sleeve 1608 is fixed at the upper end of the vertical rod 1606, and a cover plate 1609 is fixed at the upper end of the elevating sleeve 1608. An elevating block 1610 is slidably arranged inside the elevating sleeve 1608. A downward pressing spring 1611 is arranged inside the elevating sleeve 1608, and both ends of the downward pressing spring 1611 are abutted against the cover plate 1609 and the elevating block 1610 respectively. A conical ejector rod 1612 is rotatably arranged at the lower end of the elevating block 1610 through a bearing. During use, the operator can slide the sliding seat 1601 to the edge position, then abut the upper process hole of the motor shaft to be processed against the conical ejector rod 1612, push up the conical ejector rod 1612 to compress the downward pressing spring 1611, and then align the lower process hole of the motor shaft to be processed with the conical base 1603. Under the action of the downward pressing spring 1611, the motor shaft can be clamped. After fixing the motor shaft, the operator can first push the sliding seat 1601 in the direction close to the rotating cylinder 3 and position it by the locking component, and then drive the conical base 1603 to rotate by the clamping motor 1604, thereby driving the motor shaft to rotate for surface polishing. In addition, the operator can adjust the position of the vertical rod 1606 according to the length of the motor shaft to achieve the effect of fixing motor shafts of different lengths.

[0054] The locking assembly includes a slide bar 1615, an iron block 1616, and an electromagnet 1619. A slide hole 1613 is formed in the inner wall of the chute 15 close to the rotating cylinder 3, and the slide bar 1615 is slidably arranged in the slide hole 1613. A threaded hole 1614 is formed in the upper surface of the workbench 1, and the bottom of the threaded hole 1614 communicates with the slide hole 1613. A threaded column 1617 is threadedly connected in the threaded hole 1614. The bottom of the threaded column 1617 abuts against the slide bar 1615, and a rotating handle 1618 is fixed to the upper end of the threaded column 1617. The iron block 1616 is fixed to the end of the slide bar 1615, and the electromagnet 1619 is fixed to one side of the sliding seat 1601 close to the rotating cylinder 3. The operator can adjust the position of the slide bar 1615 according to the diameter of the motor shaft and fix it through the threaded column 1617. When the sliding seat 1601 moves closer to the rotating cylinder 3, the electromagnet 1619 fits with the iron block 1616. At this time, the electromagnet 1619 is turned on to fix the position of the sliding seat 1601. After the polishing of the motor shaft is completed, the electromagnet 1619 is turned off, and the sliding seat 1601 can be slid to the edge position of the workbench 1 to facilitate loading and unloading.

[0055] A small hole 1101 is formed in the sealing cover 11, and a sealing gasket 1102 is arranged in the small hole 1101. A sealing plug 1103 is inserted into the small hole 1101. The upper end of the conical support column 13 is made of a magnet. When putting the motor shaft into the soft shell 10, for some motor shafts that can be adsorbed by a magnet, it is easier to align the process hole at the bottom of the motor shaft with the conical support column 13. When it is necessary to replace the motor shaft inside the soft shell 10, the sealing cover 11 needs to be opened. At this time, the sealing plug 1103 can be removed first to allow external air to enter the soft shell 10. At this time, the air pressure inside and outside the sealing cover 11 is the same, making it easier to open.

[0056] The polishing head 12 includes a bolt base 1201, a brush holder 1202, and a number of polishing bristles 1203. The polishing bristles 1203 are fixed to the brush holder 1202. The bolt base 1201 is fixed to the end of the extension rod 7, and the brush holder 1202 is threadedly connected to the bolt base 1201. For the polishing of the same batch of motor shafts, the polishing head 12 at the position where the diameter changes on the corresponding motor shaft is more likely to be worn. The operator can replace the severely worn polishing bristles 1203 separately to reduce the replacement cost.

[0057] Inside the soft shell 10, several fixing bars 17 are provided. The fixing bars 17 are fixed to the inner wall of the rotating cylinder 3 by bolts, and the fixing bars 17 diverge from the fixing tube 6. When the soft shell 10 folds and contracts, under the action of the fixing bars 17, the concave position of the soft shell 10 matches the position of the fixing tube 6, preventing the rest of the soft shell 10 from being concave and folding between the fixing tube 6 and the motor shaft, resulting in the position where the soft shell 10 aligns with the fixing tube 6 not contracting in place. Further, it ensures that the distances between each polishing head 12 and the outer wall of the motor shaft being polished are consistent, further improving the polishing effect.

[0058] The above fixing methods are the most commonly used fixed connection methods in the art, such as welding, bolt connection, interference fit, etc. The above electrical components, such as the power motor 503, the clamping motor 1604, and the electromagnet 1619, are all products of the prior art and can be directly purchased and used in the market. The specific principles will not be elaborated here.

[0059] The working principle of the present invention:

[0060] Before polishing, the operator places a motor shaft of the same batch to be processed inside the soft shell 10, and presses the process hole at one end of the motor shaft against the top of the conical support column 13. Then, the sealing cover 11 is covered, the detachable protective rod 103 is removed, and then approaching the rotating cylinder 3, the operator steps on the pedal ring 1407 downward with the foot, and the air extraction piston 1401 is pulled downward. At this time, the gas inside the soft shell 10 enters the connecting cylinder 4 through the first one-way valve 1404. Then, the return spring 1402 drives the air extraction piston 1401 to reset upward. At this time, the gas inside the connecting cylinder 4 is discharged to the outside through the second one-way valve 1405. After repeating this process, the gas inside the soft shell 10 can be discharged, causing the soft shell 10 to sink inward and fit onto the internal motor shaft. At this time, the soft shell 10 will drive the shrinkage tube 8 to shrink into the fixed tube 6. When the soft shell 10 wrinkles and shrinks, under the action of the fixed strip 17, the sunken position of the soft shell 10 is matched with the position of the fixed tube 6, preventing the rest of the soft shell 10 from sinking inward and folding between the fixed tube 6 and the motor shaft, resulting in the shrinkage of the aligned position of the soft shell 10 and the fixed tube 6 not being in place. And according to the different diameters at different positions of the motor shaft, the moving distance of the shrinkage tube 8 is different. The shrinkage tube 8 shrinks into the rotating cylinder 3. The internal space of the shrinkage tube 8 is divided into two parts by the transmission piston 902. At this time, the internal space of the shrinkage tube 8 near the ventilation hole 903 is communicated with the space between the soft shell 10 and the rotating cylinder 3 through the ventilation hole 903 and maintains the same air pressure. The air pressure in the internal space of the shrinkage tube 8 near the extension rod 7 gradually decreases as the shrinkage tube 8 moves. At this time, the air pressures at both ends of the transmission piston 902 are inconsistent, and the pressure difference will drive the transmission piston 902 and the extension rod 7 to extend outward. The polishing head 12 follows the extension rod 7 and extends outward synchronously. Moreover, the moving distance of the shrinkage tube 8 matches the moving distance of the corresponding extension rod 7. During polishing, the operator can slide the sliding seat 1601 to the edge position, then press the process hole at the upper end of the motor shaft to be processed against the conical ejector rod 1612, push the conical ejector rod 1612 upward and compress the downward pressure spring 1611, and then align the process hole at the lower end of the motor shaft to be processed with the conical base 1603. Under the action of the downward pressure spring 1611, the motor shaft can be clamped. After fixing the motor shaft, the operator can first push the sliding seat 1601 in the direction close to the rotating cylinder 3. The electromagnet 1619 is attached to the iron block 1616. At this time, the electromagnet 1619 is turned on to fix the position of the sliding seat 1601. Then, the clamping motor 1604 drives the conical base 1603 to rotate, thereby driving the motor shaft to rotate for surface polishing. In addition, at this time, the grinding surface formed by the rotation of several polishing heads 12 can just fit the surface of the motor shaft to be processed, and cooperate with the rotation of the motor shaft to polish the surface of the motor shaft, so that the outer surface of the motor shaft is polished once, improving the polishing efficiency while avoiding the problem of uneven polishing caused by segmented polishing and improving the polishing quality. In addition, when placing the motor shaft into the soft shell 10, for some motor shafts that can be adsorbed by magnets,It is easier to align the bottom process hole of the motor shaft with the conical support column 13. When the motor shaft inside the soft shell 10 needs to be replaced, the sealing cover 11 needs to be opened. At this time, the sealing plug 1103 can be removed first to allow external air to enter the soft shell 10. At this time, the air pressure inside and outside the sealing cover 11 is the same, making it easier to open. Moreover, for the polishing of the same batch of motor shafts, the polishing head 12 at the position where the diameter changes on the corresponding motor shaft is more likely to be worn. The operator can replace the severely worn polishing bristles 1203 separately to reduce the replacement cost.

[0061] The above describes the preferred embodiments of the present patent in detail. However, the present patent is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present patent.

Claims

1. A polishing device for the production of motor shafts, comprising a workbench (1), characterized in that, an installation groove (2) is opened above the workbench (1), a rotating cylinder (3) is rotatably arranged in the installation groove (2) through a thrust bearing, the lower end of the rotating cylinder (3) is sealed, and a sealing cover (11) is threadedly connected to the upper end of the rotating cylinder (3). A connecting cylinder (4) is fixed to the lower end of the rotating cylinder (3), and a power mechanism (5) for driving the connecting cylinder (4) to rotate is provided below the workbench (1). An air extraction mechanism (14) for extracting the gas inside the rotating cylinder (3) is provided inside the connecting cylinder (4). A plurality of fixed pipes (6) distributed in a spiral manner are connected to the side wall of the rotating cylinder (3). The inside of the fixed pipe (6) is communicated with the inside of the rotating cylinder (3). An extension rod (7) and a contraction pipe (8) are slidably arranged in the fixed pipe (6). A reverse transmission mechanism (9) is provided between the extension rod (7) and the contraction pipe (8). One end of the outer side of the extension rod (7) is connected with a polishing head (12). A soft shell (10) is arranged inside the rotating cylinder (3). The soft shell (10) is cylindrical, and the upper and lower ends of the soft shell (10) are respectively fixedly connected to the upper and lower ends of the rotating cylinder (3). One end of the contraction pipe (8) is fixed to the outer wall of the soft shell (10). A conical support column (13) is fixed inside the bottom of the rotating cylinder (3). A sliding groove (15) is opened on the workbench (1), and a vertical clamping mechanism (16) for clamping the motor shaft is arranged in the sliding groove (15).

2. The polishing device for the production of motor shafts according to claim 1, characterized in that, the power mechanism (5) includes a driving gear (501) fixed to the outer wall of the connecting cylinder (4) and a driving gear (504). An installation frame (502) is fixed to the lower surface of the workbench (1). A power motor (503) is fixed to the installation frame (502). The driving gear (504) is fixed to the output shaft of the power motor (503), and the driving gear (504) meshes with the driving gear (501).

3. The polishing device for the production of motor shafts according to claim 1 or 2, characterized in that, the reverse transmission mechanism (9) includes a transmission piston (902). The contraction pipe (8) is slidably arranged in the fixed pipe (6), and the extension rod (7) is slidably arranged in the contraction pipe (8). A first sealing ring (901) is embedded on the outer side of one end of the contraction pipe (8) away from the soft shell (10), and the first sealing ring (901) abuts against the inner wall of the fixed pipe (6). The transmission piston (902) is slidably arranged inside the contraction pipe (8), and one end of the extension rod (7) is fixedly connected to the transmission piston (902). A round hole is opened at one end of the fixed pipe (6) away from the rotating cylinder (3). The other end of the extension rod (7) passes through the round hole and is connected to the polishing head (12). A second sealing ring is embedded on the inner wall of the round hole, and the second sealing ring abuts against the extension rod (7). A plurality of air holes (903) are opened on the side wall of the contraction pipe (8) close to the soft shell (10), and an air inlet hole (904) is opened on the rotating cylinder (3).

4. The polishing device for the production of motor shafts according to claim 1 or 2, It is characterized in that the air extraction mechanism (14) includes an air extraction piston (1401) slidably arranged inside the connecting cylinder (4). A suction rod (1403) is fixed to the lower end of the air extraction piston (1401). A return spring (1402) is arranged inside the connecting cylinder (4), and both ends of the return spring (1402) abut against the bottom of the rotating cylinder (3) and the upper end of the air extraction piston (1401) respectively. A plurality of first one-way valves (1404) are installed on the bottom side wall of the rotating cylinder (3), and a plurality of second one-way valves (1405) are installed on the air extraction piston (1401).

5. A polishing device for motor shaft production according to claim 4, It is characterized in that a fixed disk (1408) is fixed to the bottom of the connecting cylinder (4). A plurality of through holes evenly distributed in a circumferential manner are formed in the fixed disk (1408), and a perforation is formed in the middle of the fixed disk (1408). The suction rod (1403) passes through the perforation. A threaded sleeve (1406) is formed at the bottom of the air extraction piston (1401). A step ring (1407) is fixed to one end of the suction rod (1403), and the other end of the suction rod (1403) is threadedly connected to the threaded sleeve (1406). A groove (101) is formed on one side of the workbench (1) close to the rotating cylinder (3), and a detachable protective rod (103) is arranged at the opening of the groove (101), and a threaded groove (102) is formed on the inner wall of the groove (101).

6. A polishing device for motor shaft production according to claim 1 or 2, It is characterized in that the vertical clamping mechanism (16) includes a sliding seat (1601) slidably arranged in the sliding groove (15) and a locking component for fixing the position of the sliding seat (1601). A rotating hole (1602) is formed in the sliding seat (1601), and a conical base (1603) is rotatably arranged in the rotating hole (1602). A clamping motor (1604) for driving the conical base (1603) to rotate is fixed to the lower end of the sliding seat (1601). An installation hole is formed in the sliding seat (1601), and a fixed sleeve (1605) is fixed in the installation hole. A vertical rod (1606) is slidably inserted in the fixed sleeve (1605), and a plurality of fastening bolts (1607) for fixing the vertical rod (1606) are arranged on the side wall of the fixed sleeve (1605). The upper end of the vertical rod (1606) is fixed with a lifting sleeve (1608), the upper end of the lifting sleeve (1608) is fixed with a cover plate (1609), and a lifting block (1610) is slidably arranged inside the lifting sleeve (1608). A downward pressure spring (1611) is arranged inside the lifting sleeve (1608), and both ends of the downward pressure spring (1611) abut against the cover plate (1609) and the lifting block (1610) respectively. The lower end of the lifting block (1610) is rotatably arranged with a conical ejector rod (1612) through a bearing.

7. A polishing device for motor shaft production according to claim 6, It is characterized in that The locking assembly includes a sliding rod (1615), an iron block (1616) and an electromagnet (1619). A sliding hole (1613) is formed in the inner wall of the chute (15) close to the rotating cylinder (3), and the sliding rod (1615) is slidably arranged in the sliding hole (1613). A threaded hole (1614) is formed in the upper surface of the workbench (1), the bottom of the threaded hole (1614) communicates with the sliding hole (1613), and a threaded column (1617) is threadedly connected in the threaded hole (1614). The bottom of the threaded column (1617) abuts against the sliding rod (1615), and a rotating handle (1618) is fixed to the upper end of the threaded column (1617). The iron block (1616) is fixed to the end of the sliding rod (1615), and the electromagnet (1619) is fixed to one side of the sliding seat (1601) close to the rotating cylinder (3).

8. A polishing device for motor shaft production according to claim 1, characterized in that, a small hole (1101) is formed in the sealing cover (11), a sealing gasket (1102) is arranged in the small hole (1101), a sealing plug (1103) is inserted into the small hole (1101), and the upper end of the conical support column (13) is made of a magnet.

9. A polishing device for motor shaft production according to claim 1, characterized in that, the polishing head (12) includes a bolt base (1201), a brush hair seat (1202) and a plurality of polishing brush hairs (1203). The polishing brush hairs (1203) are fixed to the brush hair seat (1202), the bolt base (1201) is fixed to the end of the extension rod (7), and the brush hair seat (1202) is threadedly connected to the bolt base (1201).

10. A polishing device for motor shaft production according to claim 1, characterized in that, a plurality of fixing strips (17) are arranged inside the soft shell (10), the fixing strips (17) are fixed to the inner wall of the rotating cylinder (3) by bolts, and the fixing strips (17) diverge from the fixing tube (6).

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