Motor shaft automatic polishing and grinding equipment

Abstract

The application relates to the technical field of motor shaft production and processing, in particular to a motor shaft automatic polishing and grinding device, which comprises a lathe, a polishing mechanism, a shaft piece feeding mechanism and an abutting clamping mechanism. The motor shaft is horizontally conveyed to the processing area of the lathe through a shaft piece conveying assembly, and is jacked up to the space between the two abutting clamping mechanisms through a shaft piece jacking assembly. When the two abutting clamping mechanisms are relatively close, the thimble abuts against the end of the motor shaft. The clamping block connected with the thimble through an abutting clamping transmission assembly can position the end of the motor shaft, so that the thimble can coaxially abut against the end of the motor shaft, and the problems that the existing motor shaft polishing cannot improve the polishing precision and production efficiency due to manual fixing and polishing are solved. In addition, the clamping block is slidably arranged on the driving block along the axial direction of the thimble. When the polishing wheel grinds the circumferential surface of the end of the motor shaft, the clamping block can timely avoid the interference with the polishing wheel according to the running track of the polishing wheel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motor shaft production and processing, in particular to a motor shaft automatic polishing and grinding equipment. BACKGROUND

[0002] At present, the polishing and grinding process of the motor shaft mainly relies on manual operation, and the worker needs to manually fix the workpiece and hold the polisher to work. This traditional method not only has low efficiency, but also is greatly affected by the technical level of the operator, which can easily lead to unstable polishing quality, uneven surface roughness, size out-of-tolerance and other problems, and is difficult to meet the precision requirements of batch production. In addition, manual polishing also has safety hazards, and the high-speed rotating polishing tool may cause debris to splash, causing harm to the operator.

[0003] Although the semi-automatic polishing equipment on the market can realize mechanical operation in the polishing link, manual intervention is still needed in the key clamping and positioning link. The operator needs to manually install the motor shaft on the clamp, carefully adjust the position and tighten, which not only consumes time and effort, but also requires a high degree of proficiency of the operator. Since the manual clamping inevitably has positioning errors, it is difficult to ensure the consistency of the reference in the subsequent polishing process, which directly affects the machining precision of the final product. This semi-automatic production method is essentially only the mechanization of part of the manual operation, and there are still obvious breakpoints in the entire process, which cannot form a continuous and efficient automatic production line. SUMMARY

[0004] In view of the problems existing in the prior art, the present application provides a motor shaft automatic polishing and grinding equipment, which can transport the motor shaft horizontally to the machining area of the lathe through the shaft conveying assembly, and lift it to the two abutting clamping mechanisms through the shaft lifting assembly. When the two abutting clamping mechanisms are relatively close, the ejector pin will abut against the end of the motor shaft, and the clamping block connected with the ejector pin through the abutting clamping transmission assembly can position the end of the motor shaft, so that the ejector pin can abut coaxially against the end of the motor shaft. Then the polishing mechanism polishes and grinds the rotating motor shaft, solving the problem that the existing motor shaft polishing cannot improve the polishing precision and production efficiency due to manual fixing and polishing.

[0005] In order to solve the problems in the prior art, the motor shaft automatic polishing and grinding equipment comprises a lathe, characterized in that the lathe is provided with a polishing mechanism, a shaft piece feeding mechanism and an abutting clamping mechanism, the shaft piece feeding mechanism comprises a shaft piece conveying assembly horizontally passing below a machining area of the lathe, and a shaft piece jacking assembly arranged below the shaft piece conveying assembly and used for jacking the shaft piece on the shaft piece conveying assembly to between a main shaft and a tailstock of the lathe, and the abutting clamping mechanism comprises a disc-shaped support mounted on the main shaft and the tailstock of the lathe, a thimble coaxially and slidingly arranged in the disc-shaped support and used for abutting against an end of the shaft piece, clamping blocks distributed on the disc-shaped support along a circumference of the thimble and capable of moving along a radial direction of the disc-shaped support, and an abutting clamping transmission assembly arranged in the disc-shaped support and used for drivingly connecting the thimble and the clamping blocks, so that when the thimble abuts against the end of the shaft piece and continuously moves relative to the disc-shaped support, the clamping blocks abut against a circumferential surface of the shaft piece along the radial direction.

[0006] Preferably, the abutting clamping transmission assembly further comprises a rotating ring coaxially and rotatably arranged in the disc-shaped support and drivingly connected with the thimble, the rotating ring is provided with driving grooves distributed along a circumference thereof, the driving grooves extend along a direction deviated from a radial direction of the rotating ring, and the abutting clamping transmission assembly further comprises driving blocks distributed on the disc-shaped support along the circumference of the thimble and capable of moving along the radial direction of the disc-shaped support, the driving blocks are provided with driving pins slidingly matched with the driving grooves, and the thimble moves relative to the rotating ring to rotate the rotating ring.

[0007] Preferably, the abutting clamping transmission assembly further comprises a rotating pipe rotatably arranged in the disc-shaped support, the rotating pipe is provided with arc-shaped grooves distributed along a circumference thereof, and one end of the rotating pipe is connected with the rotating ring; and the abutting clamping transmission assembly further comprises a sliding pipe coaxially and slidingly arranged in the disc-shaped support, one end of the sliding pipe is connected with the thimble, the sliding pipe is provided with guide pins extending along a radial direction thereof, and the guide pins are slidingly matched with the arc-shaped grooves.

[0008] Preferably, an elastic reset element is arranged between the thimble and the disc-shaped support.

[0009] Preferably, one end of the disc-shaped support towards the thimble is provided with a poking ring capable of moving along a circumference thereof, the clamping blocks and the driving blocks are elastically connected, the poking ring is provided with sliding grooves slidingly matched with the clamping blocks, and when a working position of the polishing mechanism abuts against the poking ring, the clamping blocks move along an axial direction of the shaft piece to expose the end circumferential surface of the shaft piece.

[0010] Preferably, the driving blocks are provided with connecting pins slidingly penetrating the clamping blocks, the connecting pins are provided with elastic buffer elements, and the elastic buffer elements are located between the clamping blocks and the driving blocks.

[0011] Preferably, the clamping blocks are provided with rollers at contact positions with the cylindrical surface of the motor shaft.

[0012] Preferably, the outer periphery of the dial ring is provided with a thrust bearing, and the polishing mechanism comprises a polishing support provided on the top of the lathe, a polishing wheel rotatably provided on the bottom of the polishing support, a polishing motor provided on the top of the polishing support and rotatably connected with the polishing wheel, and a dial support provided on the bottom of the polishing support and located on both sides of the polishing wheel, used for pushing the thrust bearing to move in the axial direction.

[0013] Preferably, the disc-shaped support comprises an inner disc connected with the main shaft of the lathe, one end of the rotating pipe is rotatably connected with the inner disc, an outer disc is coaxially arranged with the inner disc, the driving block is slidably arranged on the outer disc, and a connecting column is distributed between the inner disc and the outer disc in the circumferential direction, and two ends of the connecting column are fixedly connected with the inner disc and the outer disc, respectively.

[0014] Preferably, the shaft conveying assembly comprises two roller chains arranged in parallel below the machining area of the lathe, and V-shaped port supporting plates are arranged at equal intervals on the roller chains; the shaft lifting assembly comprises a sliding table cylinder arranged below the two roller chains, and a V-shaped port supporting seat is arranged on the working end of the sliding table cylinder, and when the sliding table cylinder works, the V-shaped port supporting seat lifts the shaft horizontally placed on the V-shaped port supporting plate upward.

[0015] The beneficial effects of the present application compared with the prior art are:

[0016] In the present application, the motor shaft is conveyed to the machining area in a horizontal manner by means of the shaft conveying assembly, the whole conveying process is stable and reliable, and the posture of the motor shaft is kept consistent during movement. Then, the shaft lifting assembly starts to lift the motor shaft from the conveying track to the working position and accurately sends it between the two abutting clamping mechanisms. At this time, the clamping mechanism starts to move closer to each other, and the plunger in the clamping mechanism abuts against the end of the motor shaft to preliminarily position the motor shaft.

[0017] Then the plunger and the clamping block are synchronously driven by the abutting clamping transmission assembly, and the clamping block completes the stable positioning of the motor shaft while contacting the circumferential surface of the end of the motor shaft. The clamping block cooperates with the plunger to limit the axial and radial displacement of the motor shaft. On this basis, the polishing mechanism starts to work, and the surface of the motor shaft in the rotating state is uniformly and continuously polished and ground. The whole process has high automation degree, avoids the error accumulation and efficiency bottleneck caused by manual intervention, and significantly improves the polishing quality and production rhythm.

[0018] The application also slidably arranges the clamping block on the driving block along the axial direction of the ejector pin, so that the clamping block can timely avoid interference with the polishing wheel according to the running track of the polishing wheel when the polishing wheel polishes the end surface of the motor shaft, thereby avoiding interference with the polishing wheel. This structural arrangement ensures stable positioning of the clamping block on the motor shaft in the initial stage, and also provides dynamic displacement capability in the polishing stage, so that the polishing wheel can cover the entire end surface of the motor shaft without obstacles. In this way, the problem of polishing blind area caused by space limitation of the traditional clamping structure is effectively solved, the integrity and flatness of the polished surface of the motor shaft are ensured, and the overall machining quality and appearance consistency are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a perspective view of a motor shaft automatic polishing and grinding equipment according to the present application.

[0020] Figure 2 is a partial enlarged view of A of Figure 1

[0021] Figure 3 is a front view of a motor shaft automatic polishing and grinding equipment according to the present application.

[0022] Figure 4 is a perspective view of an abutting and clamping mechanism in a motor shaft automatic polishing and grinding equipment according to the present application.

[0023] Figure 5 is a partial enlarged view of B of Figure 4

[0024] Figure 6 is a sectional view of an abutting and clamping mechanism in a motor shaft automatic polishing and grinding equipment according to the present application.

[0025] Figure 7 is a partial enlarged view of C of Figure 6

[0026] Figure 8 is a perspective exploded view of a rotating ring and a driving block in a motor shaft automatic polishing and grinding equipment according to the present application.

[0027] Figure 9 is a perspective view of a clamping block in a motor shaft automatic polishing and grinding equipment according to the present application.

[0028] Figure 10 is a partial enlarged view of D of Figure 9

[0029] ​​​​The figure marks are: 1, lathe; 2, polishing mechanism; 21, polishing support; 22, polishing wheel; 23, polishing motor; 24, dialing frame; 31, shaft piece conveying assembly; 311, roller chain; 312, V-shaped mouth support plate; 32, shaft piece jacking assembly; 321, sliding table air cylinder; 322, V-shaped mouth support seat; 41, disc-shaped support; 411, inner disc; 412, outer disc; 413, connecting column; 42, thimble; 43, clamping block; 431, roller; 441, rotating ring; 4411, driving groove; 442, driving block; 4421, driving pin; 4422, connecting pin; 4423, elastic buffer element; 443, rotating tube; 4431, arc-shaped groove; 444, sliding tube; 4441, guide pin; 445, elastic reset element; 446, dialing ring; 4461, sliding groove; 4462, thrust bearing. DETAILED DESCRIPTION

[0030] In order to further understand the features, technical means and specific purposes and functions achieved by the present application, the present application will be described in further detail below in conjunction with the drawings and specific embodiments.

[0031] As shown in Figure 1 , Figure 2 and Figure 3 , an automatic polishing and grinding equipment for motor shafts comprises a lathe 1 and a polishing mechanism 2 arranged above the lathe 1, and a shaft piece feeding mechanism is arranged below the machining area of the lathe 1, and an abutting clamping mechanism is arranged on the main shaft and tailstock of the lathe 1, the shaft piece feeding mechanism comprises: a shaft piece conveying assembly 31 horizontally passing below the machining area of the lathe 1; a shaft piece jacking assembly 32 arranged below the shaft piece conveying assembly 31 and used for jacking the shaft piece on the shaft piece conveying assembly 31 to the space between the main shaft and the tailstock of the lathe 1; the abutting clamping mechanism comprises: a disc-shaped support 41 mounted on the main shaft and the tailstock of the lathe 1; a thimble 42 coaxially and slidingly arranged in the disc-shaped support 41 and used for abutting against the end of the shaft piece; clamping blocks 43 distributed on the disc-shaped support 41 along the circumference of the thimble 42, and the clamping blocks 43 can move radially along the disc-shaped support 41; and an abutting clamping transmission assembly arranged in the disc-shaped support 41 to drive the thimble 42 and the clamping blocks 43, when the thimble 42 abuts against the end of the shaft piece and continuously moves relative to the disc-shaped support 41, the clamping blocks 43 abut against the circumferential surface of the shaft piece radially.

[0032] Below the lathe 1 processing area, a shaft feeding mechanism is arranged to complete the automatic delivery and accurate positioning of the motor shaft. The feeding mechanism mainly consists of two parts: one is the shaft conveying assembly 31, which horizontally penetrates the lower part of the lathe 1 processing area, and is used to stably convey the motor shaft to the predetermined position along the straight line direction; the other is the shaft jacking assembly 32, which is arranged below the conveying path and can be started after the motor shaft reaches the specified position, lifting it from the conveying line to the main shaft and tailstock, preparing for clamping and positioning.

[0033] The main shaft and the tailstock are provided with coaxially arranged abutting clamping mechanisms for coaxial positioning and stable holding of the motor shaft. The abutting clamping mechanism includes a disc-shaped support 41, a plunger 42, clamping blocks 43 and a transmission assembly. The plunger 42 can slide axially in the disc-shaped support 41 and abut on the end face of the motor shaft during positioning. A plurality of clamping blocks 43 are evenly distributed around the plunger 42 and can move in the radial direction of the disc-shaped support 41, so that when the plunger 42 moves axially and continues to apply a pushing force, the clamping blocks 43 are driven by the abutting clamping transmission assembly to move radially towards each other synchronously, and finally the motor shaft is clamped in all directions in the circumferential direction.

[0034] This structure not only ensures the coaxiality and axial positioning accuracy of the motor shaft before and after clamping, but also provides an undisturbed working space for subsequent polishing due to the radial dynamic response characteristics of the clamping blocks 43. In combination with the polishing function of the polishing mechanism 2, the end face and the circumferential surface of the motor shaft can be uniformly and continuously polished, completely avoiding the inconsistent accuracy and surface residue problems often encountered in manual operation, greatly improving the polishing quality and production efficiency.

[0035] As shown in Figure 4-10 The abutting clamping transmission assembly includes a rotating ring 441 coaxially arranged in the disc-shaped support 41 and in transmission connection with the plunger 42, and a driving groove 4411 is arranged on the rotating ring 441 along the circumferential direction thereof, the driving groove 4411 extends in a direction deviating from the radial direction of the rotating ring 441; a driving block 442 is arranged on the disc-shaped support 41 along the circumferential direction of the plunger 42, the driving block 442 can move radially along the disc-shaped support 41, and a driving pin 4421 is arranged on the driving block 442 in sliding fit with the driving groove 4411, the rotating ring 441 rotates when the plunger 42 moves relative to the rotating ring 441.

[0036] The abutting clamping transmission assembly realizes the mechanical coupling of the axial movement of the plunger 42 and the radial movement of the clamping blocks 43 by introducing the linkage structure between the rotating ring 441 and the driving block 442, thereby realizing synchronous clamping during the positioning of the motor shaft. Specifically, the rotating ring 441 is coaxially installed in the disc-shaped support 41 and can be in transmission fit with the plunger 42 during movement. A plurality of driving grooves 4411 are arranged on the rotating ring 441 along the circumferential direction thereof.

[0037] The driving blocks 442 are distributed around the ejector pin 42 and are installed on the disc-shaped support 41 to realize radial movement. Each driving block 442 is provided with a driving pin 4421 which is slidingly engaged with a driving groove 4411 on the rotating ring 441. When the ejector pin 42 generates axial movement, it will drive the rotating ring 441 to rotate around its own axis due to the transmission connection between the ejector pin 42 and the rotating ring 441. At the same time, the rotating ring 441 rotates, and due to the inclined structure of the driving groove 4411, the driving pin 4421 is slidingly driven in the groove, and then the driving pin 4421 pushes the driving block 442 to move radially towards the motor shaft direction, realizing the clamping action.

[0038] This mechanism design has the advantages of compact structure and coordinated action. Since the transmission between the ejector pin 42 and the rotating ring 441 is rigid linkage, it can ensure that the ejector pin 42 positions the motor shaft end while the clamping block 43 synchronously completes radial folding, thereby realizing coaxial clamping of the motor shaft. No additional control or driving input is required during clamping, which reduces the complexity of the control system and improves the reliability and response speed of the action.

[0039] As shown in Figure 4-10 The abutting clamping transmission assembly further includes a rotating tube 443 which is rotatably arranged in the disc-shaped support 41, the rotating tube 443 is provided with an arc-shaped groove 4431 which is distributed along the circumferential direction thereof, one end of the rotating tube 443 is connected with the rotating ring 441; a sliding tube 444 which is coaxially and slidingly arranged in the disc-shaped support 41, one end of the sliding tube 444 is connected with the ejector pin 42, the sliding tube 444 is provided with a guide pin 4441 which extends along the radial direction thereof, the guide pin 4441 is slidingly matched with the arc-shaped groove 4431.

[0040] The abutting clamping transmission assembly further includes the rotating tube 443 and the sliding tube 444, thereby effectively converting the axial movement of the ejector pin 42 into the rotating movement of the rotating ring 441, providing a power source for the clamping action. The rotating tube 443 is coaxially and rotatably arranged in the disc-shaped support 41, the outer side thereof is provided with the arc-shaped groove 4431 which is distributed along the circumferential direction, for realizing the movement conversion between sliding and rotating. One end of the rotating tube 443 is fixedly connected with the rotating ring 441, and the two work cooperatively as a rotating unit.

[0041] The sliding tube 444 is coaxially and slidingly installed in the disc-shaped support 41, and one end thereof is connected with the ejector pin 42 and can move forward and backward along with the axial advancement of the ejector pin 42. The sliding tube 444 is provided with a plurality of guide pins 4441 protruding in the radial direction, each of which is embedded in the arc-shaped slot 4431 of the corresponding rotating tube 443 and is in sliding cooperation with the arc-shaped slot 4431. When the ejector pin 42 abuts against the end portion of the motor shaft, the disc-shaped support 41 continues to move, the sliding tube 444 moves relative to the rotating tube 443, and the arc-shaped slot 4431 is constrained by the guide pin 4441 to rotate. While the rotating tube 443 rotates, the rotating ring 441 fixedly connected with the rotating tube 443 also synchronously rotates, thereby driving the drive pin 4421 through the drive groove 4411 on the rotating ring 441 to push the drive blocks 442 distributed in the circumferential direction of the disc-shaped support 41 to move radially inward, so that the clamping blocks 43 are synchronously clamped in the circumferential direction of the shaft.

[0042] As shown in Figure 7 , the ejector pin 42 and the disc-shaped support 41 are provided with an elastic reset element 445 therebetween.

[0043] In order to enable the abutting and clamping transmission assembly to automatically reset after completing the positioning and clamping action on the motor shaft, the elastic reset element 445 is arranged between the ejector pin 42 and the disc-shaped support 41.

[0044] During the positioning and clamping of the motor shaft, the ejector pin 42 compresses the elastic reset element 445 relative to the disc-shaped support 41. The ejector pin 42 slides relative to the disc-shaped support 41, the arc-shaped slot 4431 of the rotating tube 443 rotates under the action of the guide pin 4441 on the sliding tube 444, so that the rotating ring 441 rotates, thereby completing the radial tightening action of the clamping blocks 43. When the external force is removed or the polishing work is completed, the elastic reset element 445 releases the stored energy, and the ejector pin 42 retreats in the opposite direction under the action of the elastic force, thereby driving the sliding tube 444 to reset. The guide pin 4441 reversely slides along the arc-shaped slot 4431, so that the rotating tube 443 and the rotating ring 441 reversely rotate, thereby driving the drive pin 4421 to slide along the drive groove 4411, the drive blocks 442 are radially reset outward, and finally the clamping blocks 43 are loosened.

[0045] As shown in Figure 5 and Figure 9 , the disc-shaped support 41 is provided with a knob ring 446 capable of moving in the circumferential direction thereof at the end thereof facing the ejector pin 42, the clamping blocks 43 are elastically connected between the drive blocks 442, the knob ring 446 is provided with a sliding groove 4461 in sliding cooperation with the clamping blocks 43, and when the working part of the polishing mechanism 2 abuts against the knob ring 446, the clamping blocks 43 move in the axial direction of the shaft to expose the end circumferential surface of the shaft.

[0046] The disc-shaped support 41 is provided with a dial ring 446 at one end of the thimble 42, which can move along the circumference thereof. The dial ring 446 is arranged in a ring structure around the shaft, can move relative to the disc-shaped support 41, and is provided with a plurality of sliding grooves 4461 on the outer wall thereof, each sliding groove 4461 being in sliding fit with a corresponding clamping block 43, and used for driving the clamping block 43 to change the axial position relative to the disc-shaped support 41.

[0047] The clamping block 43 is elastically connected with the driving block 442, so that the clamping block 43 can keep the initial position when not driven by the axial force of the disc-shaped support 41, and has a certain displacement ability. When the working part of the polishing mechanism 2, such as a grinding wheel or a polishing disc, approaches and abuts against the dial ring 446 from the outside of the shaft, an axial pushing force is applied to the dial ring 446, which drives the dial ring 446 to axially displace on the disc-shaped support 41. Since the sliding grooves 4461 on the dial ring 446 are in sliding fit with the clamping blocks 43, the dial ring 446 will force all the clamping blocks 43 to axially slide along the disc-shaped support 41. Under the elastic connection of the driving block 442, the clamping blocks 43 are displaced to a certain extent, so that the clamping blocks 43 originally closely attached to the circumference of the end of the shaft are displaced to one side, and the complete circumferential area of the end surface of the shaft is exposed.

[0048] As shown in Figure 7 , the driving block 442 is provided with a connecting pin 4422 which is in sliding fit through the clamping block 43, and the connecting pin 4422 is sleeved with an elastic buffer element 4423 which is located between the clamping block 43 and the driving block 442.

[0049] When the dial ring 446 is subjected to the axial pushing force of the working part of the polishing mechanism 2 (such as a grinding wheel), the dial ring 446 is axially displaced along the disc-shaped support 41, and further drives the clamping blocks 43 in sliding fit therewith to displace under the elastic connection of the driving block 442, that is, the clamping blocks 43 are axially moved relative to the shaft, so that the end circumferential surface of the motor shaft is exposed, and the polishing operation requirement is met.

[0050] In this process, the clamping block 43 is kept in relative connection with the driving block 442 through the sliding connecting pin 4422, and the elastic buffer element 4423 (such as a spiral compression spring) sleeved on the connecting pin 4422 is compressed to store elastic energy. When the polishing mechanism 2 is withdrawn, the axial pushing force of the dial ring 446 disappears, and the elastic buffer element 4423 immediately releases the stored energy to drive the clamping block 43 to slide back to the original position along the reverse path without the active action of the driving block 442, so as to re-attach to the end of the shaft and realize the automatic recovery of the clamping action.

[0051] As shown in Figure 7 , the clamping block 43 is provided with a roller 431 at the contact position with the cylindrical surface of the motor shaft.

[0052] When the dial ring 446 is subjected to the axial thrust force of the polishing mechanism 2, the clamping block 43 is correspondingly dislodged under the driving of the driving block 442. At this time, the roller 431 between the clamping block 43 and the end of the shaft is rolled, so that the disengagement process is no longer in the form of sliding, effectively avoiding surface scratches or clamping errors caused by dry friction. Similarly, when the elastic buffer element 4423 releases the pushing of the clamping block 43 to reposition, the roller 431 structure can also ensure that the clamping block 43 smoothly and gently re-contacts the end of the shaft, reducing the problem of unstable clamping caused by jamming or impact.

[0053] As shown in Figure 3 The outer periphery of the dial ring 446 is provided with a thrust bearing 4462, and the polishing mechanism 2 comprises: a polishing support 21 provided on the top of the lathe 1; a polishing wheel 22 rotatably provided at the bottom of the polishing support 21; a polishing motor 23 provided at the top of the polishing support 21 and in rotational connection with the polishing wheel 22; and a dial holder 24 provided at the bottom of the polishing support 21 and located on both sides of the polishing wheel 22, for pushing the thrust bearing 4462 to move in the axial direction.

[0054] The polishing device further comprises a horizontal and vertical screw sliding table, and the polishing support 21 is arranged on the horizontal and vertical screw sliding table, so as to realize horizontal or vertical movement of the polishing support 21.

[0055] In order to avoid the rotation force generated when the dial ring 446 rotates being transmitted to the dial clamp, thereby interfering with the stability and accuracy of the clamping action, the thrust bearing 4462 is arranged on the outer periphery of the dial ring 446. The thrust bearing 4462 can effectively isolate the rotation force generated by the dial ring 446 due to the axial force of the polishing mechanism 2, and only allow the thrust force to be transmitted in the axial direction.

[0056] The polishing support 21 is arranged on the top of the lathe 1 and serves as the main frame for bearing the polishing functional components. The polishing wheel 22 is rotatably arranged at the bottom of the polishing support 21 through a bearing device and is the core execution member for directly contacting the shaft to be machined and realizing surface polishing. The polishing motor 23 is installed on the top of the polishing support 21, the output shaft is in rotational connection with the polishing wheel 22, and is used to provide continuous and stable rotary power to ensure consistent polishing effect.

[0057] At the bottom of the polishing support 21, a pusher 24 is arranged on both sides of the polishing wheel 22, which is used to push the push ring 446 and its matched thrust bearing 4462 to move axially. When the pusher 24 pushes the push ring 446 to feed axially during polishing, the thrust bearing 4462 transmits the force to the body of the push ring 446, thereby indirectly driving the clamping block 43 to realize the displacement or reset action; at the same time, due to the rolling structure of the thrust bearing 4462, the push ring 446 will not be subject to additional rotation restriction even if it is subject to axial thrust, thereby effectively avoiding transmitting any rotational component to the clamping assembly.

[0058] As shown in Figure 4 The disc-shaped support 41 includes: an inner disc 411 connected with the main shaft of the lathe 1, one end of the rotating pipe 443 is rotationally connected with the inner disc 411; an outer disc 412 coaxially arranged with the inner disc 411, the driving block 442 is slidingly arranged on the outer disc 412; a connecting column 413 is distributed between the inner disc 411 and the outer disc 412 in the circumferential direction, and the two ends of the connecting column 413 are fixedly connected with the inner disc 411 and the outer disc 412, respectively.

[0059] The inner disc 411 as the core base of the disc-shaped support 41 is connected with the main shaft of the lathe 1 through a mechanical connection mode, and rotates synchronously with the main shaft to ensure that the clamping mechanism and the shaft remain consistent in rotation. One end of the rotating pipe 443 is connected with the inner disc 411 in a rotating fit mode, which allows the formation of a flexible linkage between the external driving structure while not affecting the rotation of the main shaft, thereby providing the necessary rotation freedom for the clamping and displacement actions.

[0060] The outer disc 412 is arranged outside the inner disc 411 and coaxially opposite to the inner disc 411, and a sliding groove structure for guiding is arranged on the outer disc 412. The driving block 442 is slidingly installed on the outer disc 412 and can move along the radial or circumferential trajectory set thereon. This layout not only ensures the controllability of the movement path of the driving block 442, but also enables the clamping block 43 to accurately respond to the force of the polishing mechanism 2 to displace and reset.

[0061] The connecting column 413 is evenly arranged along the circumferential direction of the disc-shaped support 41, and connects the corresponding positions of the inner disc 411 and the outer disc 412 to form a stable space support frame. The two ends of each connecting column 413 are rigidly fixedly connected with the inner disc 411 and the outer disc 412, respectively, which structurally ensures that the two discs are synchronous in rotation while maintaining consistent spacing and not being axially displaced or skewed. The arrangement of the connecting column 413 not only enhances the mechanical strength of the entire disc-shaped support 41, but also provides a guiding support path required when the clamping block 43 moves, thereby providing a structural guarantee for the high precision and high repeatability of the clamping action.

[0062] As shown in Figure 2As shown, the shaft conveying assembly 31 includes two roller chains 311 arranged in parallel below the processing area of ​​the lathe 1, and V-shaped support plates 312 are evenly spaced on the roller chains 311;

[0063] The shaft lifting assembly 32 includes a slide cylinder 321 arranged below the two roller chains 311. The working end of the slide cylinder 321 is provided with a V-shaped support seat 322. When the slide cylinder 321 is working, the V-shaped support seat 322 lifts the shaft placed horizontally on the V-shaped support plate 312 upward.

[0064] The motor shaft moves to the specified position along with the roller chain 311; the slide cylinder 321 is actuated, and the V-shaped bracket 322 rises to lift the selected motor shaft from the conveyor track; after the lifting is completed, the abutment clamping mechanism intervenes to achieve precise clamping and processing preparation of the motor shaft; after processing is completed, the slide cylinder 321 descends, and the shaft can be put back on the conveyor chain for the next step.

[0065] The above embodiments merely represent one or more embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, and such modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the appended claims.

Claims

1. An automatic polishing and grinding device for a motor shaft, comprising a lathe, characterized in that: The lathe has a polishing mechanism, a shaft feeding mechanism and an abutment clamping mechanism. The shaft feeding mechanism comprises: A shaft conveying assembly passes horizontally under the machining area of ​​the lathe; A shaft lifting assembly is provided below the shaft conveying assembly and is used to lift the shaft on the shaft conveying assembly to between the main shaft and the tailstock of the lathe; The abutment clamping mechanism comprises: A disc-shaped bracket that mounts to the spindle and tailstock of a lathe; an ejector pin coaxially and slidably disposed in the disc-shaped bracket for abutting against the end of the shaft; The clamping blocks are distributed on the disc-shaped bracket along the circumference of the ejector pin, and the clamping blocks can move along the radial direction of the disc-shaped bracket; An abutment and clamping transmission assembly is provided in the disc-shaped bracket to transmit and connect the ejector pin and the clamping block. When the ejector pin abuts against the end of the shaft and continues to move relative to the disc-shaped bracket, the clamping block abuts against the circumferential surface of the shaft in the radial direction. The abutment clamping transmission assembly also includes: A rotating ring is coaxially rotatably disposed in the disc-shaped bracket and is drivingly connected to the ejector pin. The rotating ring is provided with drive grooves distributed along its circumference, and the drive grooves extend in a direction deviating from the radial direction of the rotating ring. A driving block is distributed on the disc-shaped bracket along the circumference of the ejector pin. The driving block can move radially along the disc-shaped bracket. The driving block is provided with a driving pin that slidably cooperates with the driving groove. When the ejector pin moves relative to the rotating ring, the rotating ring rotates. The abutment clamping transmission assembly also includes: A rotating tube is rotatably disposed in the disc-shaped bracket, the rotating tube is provided with arc-shaped grooves distributed along its circumference, and one end of the rotating tube is connected to the rotating ring; A sliding tube is coaxially slidably disposed in the disc-shaped bracket, one end of the sliding tube is connected to the ejector pin, and a guide pin extending radially thereof is provided on the sliding tube, the guide pin being in sliding engagement with the arc-shaped groove; An elastic reset element is provided between the ejector pin and the disc-shaped bracket.

2. The automatic polishing and grinding equipment for a motor shaft according to claim 1, characterized in that: A toggle ring that can move along its circumference is provided at one end of the disc-shaped bracket facing the ejector pin. The clamping block and the driving block are elastically connected. The toggle ring is provided with a sliding groove that slides with the clamping block. When the working part of the polishing mechanism abuts the toggle ring, the clamping block moves along the axial direction of the shaft to expose the end circumferential surface of the shaft.

3. The automatic polishing and grinding equipment for a motor shaft according to claim 2, characterized in that: A connecting pin is provided on the driving block, and the connecting pin slides through the clamping block. An elastic buffer element is sleeved on the connecting pin, and the elastic buffer element is located between the clamping block and the driving block.

4. The automatic polishing and grinding equipment for a motor shaft according to claim 2, characterized in that: A roller is provided at the contact portion between the clamping block and the cylindrical surface of the motor shaft.

5. The automatic polishing and grinding equipment for a motor shaft according to claim 2, characterized in that: The outer periphery of the toggle ring is provided with a thrust bearing, and the polishing mechanism includes: a polishing stand, set on top of the lathe; a polishing wheel rotatably disposed on the bottom of the polishing bracket; A polishing motor is arranged on the top of the polishing bracket and is rotatably connected to the polishing wheel; The toggle frame is arranged at the bottom of the polishing bracket and located on both sides of the polishing wheel, and is used to push the thrust bearing to move axially.

6. The automatic polishing and grinding equipment for a motor shaft according to claim 1, characterized in that: The disc holder includes: An inner plate is connected to the main shaft of the lathe, and one end of the rotating tube is rotatably connected to the inner plate; an outer disk, coaxially disposed with the inner disk, and a driving block slidably disposed on the outer disk; The connecting column is distributed between the inner disk and the outer disk along the circumferential direction, and the two ends of the connecting column are fixedly connected to the inner disk and the outer disk respectively.

7. The automatic polishing and grinding equipment for a motor shaft according to claim 1, characterized in that: The shaft conveying assembly includes two roller chains arranged in parallel below the processing area of ​​the lathe, and V-shaped support plates are arranged on the roller chains at equal intervals; The shaft lifting assembly includes a slide cylinder arranged below two roller chains. The working end of the slide cylinder is provided with a V-shaped support seat. When the slide cylinder is working, the V-shaped support seat lifts the shaft placed horizontally on the V-shaped support plate upward.

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