Coupling gear machining device for encoder production

Abstract

This invention relates to the field of gear processing technology, specifically disclosing a coupling gear processing device for encoder production. The device includes a rotary support unit, an axial pressing unit, a radial feed unit, and a gear tooth processing unit. A bidirectional rigid clamping mechanism is formed by a support rod and a pressing rod with ball bearings, effectively suppressing axial runout of the workpiece. A rotary servo motor drives the workpiece for precise indexing, and a cam-driven radial smooth feed combined with a oscillating cylinder-driven gear tooth processing unit performs rotary-oscillating composite cutting, forming a dynamic multi-directional envelope processing trajectory. This effectively eliminates periodic vibration, cutting heat concentration, and stress deformation in traditional processing, improving tooth profile accuracy, tooth surface quality, and processing consistency. It is particularly suitable for the mass production of high-precision coupling gears.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of gear machining, in particular to a coupling gear machining device for encoder production. BACKGROUND

[0002] As a core element of precise measurement and control, the machining quality of the internal coupling gear of an encoder directly determines the precision and stability of the whole machine, and the coupling gear is usually characterized by small modulus, large number of teeth and high tooth surface finish requirement.

[0003] At present, in the machining process of the coupling gear, the positioning and clamping effect of the traditional machining device on the gear blank is limited, and under the periodic impact of high-speed cutting force, the workpiece is prone to produce a small amount of axial jump and radial deflection, thereby causing the tooth profile error of a single tooth to be out of tolerance, and more likely to cause uneven indexing of the tooth, which seriously reduces the transmission precision of the gear; secondly, the existing machining device adopts a relatively fixed motion trajectory between the cutter and the workpiece, and such a continuous single cutting path is easy to cause periodic forced vibration of the process system, and form vibration marks on the tooth surface which are difficult to eliminate, the vibration marks not only worsen the tooth surface roughness and become the source of transmission noise, but also form stress concentration points and reduce the fatigue life of the coupling gear. SUMMARY

[0004] In order to overcome the above technical problems, the application provides a coupling gear machining device for encoder production.

[0005] The purpose of the application can be achieved by the following technical solutions.

[0006] A coupling gear machining device for encoder production comprises:

[0007] a base;

[0008] a rotating support unit comprising a rotating servo motor vertically fixed on the base, and a support rod for placing a gear blank mounted on the output end of the rotating servo motor;

[0009] an axial pressing unit comprising a first mounting frame fixed on the base, a pressing cylinder mounted on the top of the first mounting frame, a pressing rod connected with the support rod and connected with the output end of the pressing cylinder, and the pressing rod being used for axially limiting the gear blank;

[0010] a radial feeding unit comprising a feeding slide rail and a reciprocating driving member arranged on the base, and a feeding slide table connected with the reciprocating driving member and slidably mounted on the feeding slide rail;

[0011] The gear tooth machining unit comprises a second mounting frame fixed on the feeding slide table, a vertical guide rail vertically mounted on the second mounting frame, a swing slide table slidingly mounted on the vertical guide rail, a swing cylinder mounted on the top of the second mounting frame and used for driving the swing slide table, and a gear tooth machining part arranged on the swing slide table.

[0012] As a further scheme of the present application, a cavity for accommodating the gear blank is formed at the top end of the supporting rod, and a positioning rod coaxially distributed with the supporting rod is vertically fixed in the cavity.

[0013] As a further scheme of the present application, a positioning key adapted to the positioning groove in the gear blank is arranged on one side of the positioning rod, and a plurality of rolling balls adapted to the top surface of the gear blank are movably embedded in the bottom of the pressing rod.

[0014] As a further scheme of the present application, a liquid storage cavity is further arranged at the top of the pressing rod, a liquid inlet pipe is connected to one side of the liquid storage cavity, a main flow channel in communication with the liquid storage cavity is axially formed in the pressing rod, an arc-shaped injection port is formed at the side of the bottom of the pressing rod facing the gear tooth machining part, and a bypass flow channel in communication with the main flow channel and the arc-shaped injection port is formed in the pressing rod.

[0015] As a further scheme of the present application, the positioning rod is slidingly adapted to the main flow channel, a secondary flow channel in communication with the main flow channel is axially formed in the positioning rod, the bottom of the secondary flow channel is in communication with the inside of the cavity, a plurality of injection holes are circumferentially formed in the side wall of the cavity, and the outlet of each injection hole is upwardly inclined and faces the outer peripheral gear tooth area of the gear blank.

[0016] As a further scheme of the present application, the gear tooth machining part comprises a housing fixed on the swing slide table, a rotating drum rotatably mounted in the housing, a tool bit arranged at one end of the rotating drum facing the gear blank, and a machining driving part connected to the end of the rotating drum away from the tool bit.

[0017] As a further scheme of the present application, the machining driving part comprises a first driving motor fixed on the feeding slide table, a driving wheel mounted on the output end of the first driving motor, a driven wheel mounted on one end of the rotating drum, and a transmission belt connected between the driving wheel and the driven wheel.

[0018] As a further scheme of the present application, a tensioning part adapted to the transmission belt is further mounted on one side of the second mounting frame, the tensioning part comprises a sliding groove vertically formed on the second mounting frame, a tensioning sliding block slidingly embedded in the sliding groove, a tensioning wheel rotatably mounted on the tensioning sliding block and rollingly abutting against the transmission belt, and a tension spring mounted on the bottom of the sliding groove and connected to the tensioning sliding block.

[0019] As a further scheme of the present application: the reciprocating driving member comprises bearing seats fixed at both ends of the base, a rotating shaft is rotatably installed between the two sets of bearing seats, a second driving motor connected with the rotating shaft is installed on one side bearing seat, a cam is fixedly sleeved on the rotating shaft, and a push-pull block matched with the cam is installed on the feeding slide.

[0020] As a further scheme of the present application: a closed guide groove is formed in the cam, a connecting head is installed on the push-pull block, and a sliding pin movably embedded in the closed guide groove is arranged on the connecting head.

[0021] The present application has the following beneficial effects:

[0022] Through the cooperation of the supporting rod and the pressing rod, the fast coaxial positioning and bidirectional axial pressing of the gear blank are realized, the axial jumping and radial deflection in the machining process are effectively inhibited, and the axial movement and micro displacement of the gear blank in high-speed cutting are avoided.

[0023] The tooth machining piece rotates at high speed to complete the main cutting movement, and simultaneously reciprocates in a vertical plane driven by the swing cylinder, so that the contact point, contact angle and cutting force direction of the cutting edge and the workpiece continuously change, periodic vibration caused by traditional fixed path cutting is completely broken, tooth surface vibration is effectively eliminated, cutting stress is dispersed, and spot formation caused by stress concentration is avoided.

[0024] The rotating servo motor drives the workpiece to accurately index, and the radial smooth feeding controlled by the reciprocating driving member realizes uniform machining of each tooth groove and impact-free tool withdrawal, further reduces the risk of chatter and stress concentration caused by positioning error or unstable feeding, and ensures the consistency of the whole tooth surface quality. BRIEF DESCRIPTION OF DRAWINGS

[0025] The present application will be further described below with reference to the drawings.

[0026] Figure 1 It is a perspective view of the present application;

[0027] Figure 2 It is another perspective view of the present application;

[0028] Figure 3 It is a structural view of the rotating supporting unit and the axial pressing unit in the present application;

[0029] Figure 4 It is a sectional view of the supporting rod and the pressing rod in the present application;

[0030] Figure 5 It is Figure 4 It is an enlarged view of A in the present application;

[0031] Figure 6Structure diagram of the rack tooth processing unit in the application;

[0032] Figure 7 Structure diagram of the rack tooth processing unit in the application from another perspective;

[0033] Figure 8 Structure diagram of the tensioning member in the application;

[0034] Figure 9 Structure diagram of the radial feeding unit in the application;

[0035] Figure 10 Structure diagram of the radial feeding unit in the application; Figure 9 Enlarged view of B in the application;

[0036] In the figure:

[0037] 100, base station;

[0038] 200, rotating bearing unit; 210, rotating servo motor; 220, bearing rod; 221, cavity; 222, injection hole; 230, positioning rod; 231, auxiliary flow channel; 240, positioning key;

[0039] 300, axial pressing unit; 310, first mounting frame; 320, pressing cylinder; 330, pressing rod; 331, main flow channel; 332, bypass flow channel; 333, arc-shaped injection port; 334, ball; 340, liquid storage cavity; 341, liquid inlet pipe;

[0040] 400, radial feeding unit; 410, feeding slide rail; 420, feeding slide table; 430, reciprocating driving member; 431, bearing seat; 432, rotating shaft; 433, second driving motor; 434, cam; 435, closed guide groove; 436, push-pull block; 437, connecting head; 438, sliding pin;

[0041] 500, rack tooth processing unit; 510, second mounting frame; 520, swinging cylinder; 530, vertical guide rail; 540, swinging slide table; 550, rack tooth processing member; 551, shell; 552, rotating drum; 553, tool bit; 554, driven wheel; 560, first driving motor; 570, driving wheel; 580, transmission belt; 590, tensioning member; 591, sliding groove; 592, tensioning slide block; 593, tensioning wheel; 594, tension spring;

[0042] 600, gear blank; 610, positioning groove. DETAILED DESCRIPTION

[0043] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that discussions of these implementations are merely provided to enable those skilled in the art to better understand so as to best use the subject matter described herein, and variations of elements can be made dependant on the needs and preferences of a particular implementation without departing from the scope of the present description. Various processes or components can be omitted, substituted, or added as desired. Additionally, features described with respect to some examples can be combined in other examples.

[0044] Referring now to the drawings Figure 1 , Figure 2 and Figure 3 , the application discloses a coupling gear machining device for encoder production, which comprises a base 100, a rotating supporting unit 200, an axial pressing unit 300, a radial feeding unit 400 and a gear tooth machining unit 500, the rotating supporting unit 200 comprises a rotating servo motor 210 vertically fixed on the base 100, and a supporting rod 220 for placing a gear blank 600 is installed at the output end of the rotating servo motor 210; the axial pressing unit 300 comprises a first mounting frame 310 fixed on the base 100, a pressing cylinder 320 is installed at the top of the first mounting frame 310, a pressing rod 330 matched with the supporting rod 220 is connected to the output end of the pressing cylinder 320, and the pressing rod 330 is used for axially limiting the gear blank 600; the radial feeding unit 400 comprises a feeding slide rail 410 and a reciprocating driving piece 430 arranged on the base 100, a feeding slide table 420 connected with the reciprocating driving piece 430 is slidably installed on the feeding slide rail 410; the gear tooth machining unit 500 comprises a second mounting frame 510 fixed on the feeding slide table 420 and a vertical guide rail 530 vertically installed on the second mounting frame 510, an oscillating slide table 540 is slidably installed on the vertical guide rail 530, an oscillating cylinder 520 for driving the oscillating slide table 540 is installed at the top of the second mounting frame 510, and a gear tooth machining piece 550 is arranged on the oscillating slide table 540.

[0045] Specifically, the gear blank 600 is placed at the top end of the supporting rod 220, the gear blank 600 is coaxially distributed with the supporting rod 220 and is circumferentially positioned, the pressing rod 330 is driven to move downward by the pressing cylinder 320 to axially press the gear blank 600, the clamping and axial positioning of the gear blank 600 are completed, and axial jumping and radial deflection of the gear blank 600 in the gear tooth machining process are effectively prevented.

[0046] The tooth machining piece 550 is started, and the swing slide 540 is driven to reciprocate up and down along the vertical guide rail 530 by the swing cylinder 520, so as to drive the whole tooth machining piece 550 to reciprocate up and down in a certain range, which is specifically an axial tooth thickness of the gear blank 600; the tooth machining piece 550 on the feeding slide 420 is driven to feed radially towards the gear blank 600 by the reciprocating driving piece 430, so as to realize the machining of the corresponding position tooth of the gear blank 600.

[0047] When the tooth machining is completed, the feeding slide 420 is driven to retreat laterally by the reciprocating driving piece 430, and the tooth machining piece 550 is driven to reset from the tooth groove at the same time, then the supporting rod 220 is driven to rotate by the rotating servo motor 210, and the rotating angle is consistent with the included angle of the adjacent teeth on the gear blank 600, so as to drive the adjacent machining area on the gear blank 600 to rotate to the tooth machining position, and thus the machining of the teeth on the gear blank 600 can be realized.

[0048] It should be noted that the gear blank 600 is quickly coaxially positioned and bidirectionally axially pressed by the cooperation of the supporting rod 220 and the pressing rod 330, the axial jumping and radial deflection in the machining process are effectively inhibited, and the axial movement and micro displacement of the gear blank 600 in high-speed cutting are avoided.

[0049] The tooth machining piece 550 is driven to reciprocate in the vertical plane by the swing cylinder 520 while rotating at high speed to complete the main cutting movement, and the contact point, contact angle and cutting force direction of the cutting edge and the workpiece continuously change, which completely breaks the periodic vibration caused by the traditional fixed path cutting, so as to effectively eliminate the tooth surface vibration, disperse the cutting stress, and avoid the stress concentration to form spots.

[0050] The workpiece is accurately indexed by the rotating servo motor 210, and the radial stable feeding is controlled by the reciprocating driving piece 430, so as to realize the uniform machining of each tooth groove and the non-impact tool withdrawal, further reduce the risk of vibration and stress concentration caused by positioning error or unstable feeding, and ensure the consistency of the whole tooth surface quality.

[0051] In an embodiment, please refer to Figure 4 and Figure 5 The cavity 221 for accommodating the gear blank 600 is formed at the top end of the supporting rod 220, and the positioning rod 230 coaxially distributed with the supporting rod 220 is vertically fixed in the cavity 221.

[0052] Specifically, the gear blank 600 is vertically inserted into the positioning rod 230 and placed in the cavity 221, and the positioning rod 230 is matched with the inner hole of the gear blank, so that the automatic centering and circumferential limiting of the gear blank 600 and the supporting rod 220 are realized, and radial runout and uneven mass distribution caused by eccentric installation are avoided.

[0053] It should be noted that the gear blank 600 is inserted through the positioning rod 230 and placed in the cavity 221, and the positioning rod 230 is matched with the inner hole of the blank, so that the automatic centering and circumferential limiting of the gear blank 600 and the supporting rod 220 are realized, and radial runout and uneven mass distribution caused by eccentric installation are avoided.

[0054] The positioning rod 230 effectively prevents any relative deflection or slip between the gear blank 600 and the supporting rod 220, so that each precise indexing of the rotating servo motor 210 can be transmitted to the gear blank 600 without damage, and through the cooperation of the supporting rod 220 and the upper pressing rod 330, a bidirectional rigid clamping through the gear blank 600 is formed, effectively suppressing the micro vibration and deformation that may be generated under the action of the gear tooth machining piece 550 cutting force.

[0055] Further, please refer to Figure 5 , the positioning rod 230 is provided with a positioning key 240 matched with the positioning groove 610 in the gear blank 600, and the bottom of the pressing rod 330 is circumferentially movably embedded with a plurality of ball bearings 334 matched with the top surface of the gear blank 600.

[0056] Specifically, the positioning key 240 is arranged on one side of the positioning rod 230, and when the gear blank 600 is vertically inserted into the positioning rod 230, the positioning key 240 is just clamped into the positioning groove 610 on the inside of the gear blank 600, so that the locking of the gear blank 600 and the positioning rod 230 is realized, to ensure that the gear blank 600 can rotate synchronously and accurately with the supporting rod 220. The plurality of ball bearings 334 arranged at the bottom of the pressing rod 330 are in rolling contact with the top surface of the gear blank 600, so that the gear blank 600 can rotate freely relative to the pressing rod 330. The ball bearings 334 can reduce the frictional resistance between the gear blank 600 and the pressing rod 330, and can also uniformly transmit the downward pressure of the pressing rod 330 to the gear blank 600, so as to effectively avoid the axial runout of the gear blank 600.

[0057] It is worth noting that the precise fit of the positioning key 240 and the positioning groove 610 in the gear blank 600 forms a rigid transmission pair without clearance, eliminating any possible circumferential backlash between the gear blank 600 and the support rod 220, ensuring that each indexing command of the rotary servo motor 210 is transmitted to the workpiece immediately and completely, fundamentally ensuring the indexing accuracy and positional consistency of all teeth;

[0058] The design of the ball 334 at the bottom of the pressing rod 330 converts the sliding friction in the traditional clamp into low-resistance rolling friction, allowing the gear blank 600 to rotate smoothly and freely relative to the pressing rod 330 while being subjected to sufficient axial clamping force;

[0059] The circumferentially distributed balls 334 form a dynamic pressure equalizing mechanism that can evenly distribute the concentrated pressure applied by the pressing cylinder 320 to the entire top surface of the gear blank 600. The uniform load distribution avoids local stress concentration and effectively prevents micro-deformation and axial movement of the workpiece due to uneven clamping force.

[0060] The rigid transmission provided by the positioning key 240 and the smooth rotation provided by the balls 334 together create a high-rigidity, low-friction machining environment that can effectively absorb and attenuate micro-vibrations generated during machining, directly contributing to the elimination of tooth surface vibration marks and stress spots, thereby achieving higher surface quality and geometric accuracy of the teeth.

[0061] Further, please refer to Figure 3 , Figure 4 and Figure 5 , the top of the pressing rod 330 is also provided with a liquid storage cavity 340, one side of the liquid storage cavity 340 is connected with a liquid inlet pipe 341, the pressing rod 330 is axially penetrated to form a main flow channel 331 communicating with the liquid storage cavity 340, the bottom of the pressing rod 330 is provided with an arc-shaped injection port 333 facing the gear tooth machining part 550, and the pressing rod 330 is provided with a bypass flow channel 332 communicating the main flow channel 331 and the arc-shaped injection port 333;

[0062] Specifically, during gear tooth machining, external cooling lubricant is pumped into the liquid storage cavity 340 through the liquid inlet pipe 341, then the cooling lubricant flows into the bypass flow channel 332 through the main flow channel 331, and finally is sprayed out at high speed from the arc-shaped injection port 333, the sprayed cooling lubricant can just cover the area of the gear tooth machining part 550 currently machining the gear blank 600, thereby reducing the temperature of the machining area and avoiding affecting the gear tooth machining effect due to local high temperature; since the spray angle of the arc-shaped injection port 333 is always opposite to the gear tooth machining part 550, the cooling and lubrication effect of the current gear tooth machining will not be affected by the angle adjustment of the gear blank 600.

[0063] Need to explain, through the internal flow channel design and unique arc-shaped injection port 333 through the pressing rod 330, cooling lubricant can be continuously and accurately cover the instantaneous cutting point of gear tooth processing piece 550 and gear blank 600, ensure that no matter how the gear blank 600 rotates, the cooling liquid is always opposite to the processing area needing cooling and lubrication, realize the dead angle follow-up cooling;

[0064] The cooling liquid outlet is directly integrated in the clamping system, forming an internal cooling structure, and the high-pressure cooling liquid directly reaches the cutting edge, which can instantly remove a large amount of cutting heat, effectively suppress the local temperature of the machining area, thereby avoiding the stress spots caused by the microstructure changes of the gear material due to thermal shock, and reducing the tooth profile accuracy error caused by thermal expansion and contraction;

[0065] The high-speed sprayed cooling lubricant not only plays a role in cooling, but also can timely flush and remove the cutting chips generated in the machining area, prevent the cutting chips from scratching the machined tooth surface, help to reduce the tooth surface roughness, and effectively avoid the vibration marks and rough defects caused by cutting chip winding or bonding;

[0066] The scheme integrates the cooling system and the axial pressing unit 300, and the cooling liquid is completely transported through the pressing rod 330 performing the clamping function, without additional independent cooling nozzle and its adjusting mechanism, which not only simplifies the overall structure, avoids the interference of external pipeline with the motion unit, but also ensures the high synchronization and stability of the cooling effect and the machining process;

[0067] Continuous and sufficient cooling and lubrication greatly reduce the abrasive wear and thermal wear of the gear tooth processing piece 550 during cutting, maintain the sharpness and hardness of the cutting edge, thereby significantly prolonging the service life of the cutting tool, reducing the production cost and ensuring the quality consistency of batch processing.

[0068] In addition, please refer to Figure 5 , the positioning rod 230 is slidably fitted with the main flow channel 331, the auxiliary flow channel 231 is axially formed in the positioning rod 230 and communicates with the main flow channel 331, the bottom of the auxiliary flow channel 231 communicates with the inside of the cavity 221, a plurality of injection holes 222 are circumferentially formed in the side wall of the cavity 221, and the outlet of the injection hole 222 is upwardly inclined and faces the outer peripheral tooth area of the gear blank 600;

[0069] Specifically, the cooling lubricant in the main flow channel 331 can also enter the cavity 221 through the auxiliary flow channel 231, so that the central area of the gear blank 600 is always immersed in the cooling lubricant filled in the cavity 221, improving the overall cooling effect of the gear blank 600, and the cooling lubricant in the cavity 221 can also be radially sprayed outward from each injection hole 222 arranged circumferentially, thereby continuously and fully wrapping the cooling and lubrication of the outer peripheral tooth machining area of the gear blank 600.

[0070] Notably, through the sub-flow channel 231 in the positioning rod 230 and the cavity 221, the cooling liquid can directly reach the inner hole and core area of the gear blank 600, forming an inside-out immersion cooling, the internal cooling source and the external targeted cooling from top to bottom of the pressing rod 330 are combined to form a three-dimensional surrounding cooling environment, realizing full-range temperature control of the workpiece from the core to the surface and from the root to the tooth top, greatly improving the uniformity and efficiency of thermal management;

[0071] The spray holes 222 arranged on the side wall of the cavity 221 and inclined upward at the outlet can accurately guide the cooling liquid to the root and side wall of the gear tooth, which is a key stress area, and the spray from bottom to top forms a full-wrapped lubrication of the gear tooth machining area, ensuring that the cutting edge can be fully cooled and lubricated during the whole cutting-in and cutting-out process, and fundamentally improving the friction state under extreme stress conditions;

[0072] Submerging the core area of the gear blank 600 in the cooling liquid all the time can continuously and stably remove the cutting heat accumulated inside the workpiece, effectively controlling the overall temperature rise of the workpiece, reducing the micro thermal deformation and thermal stress caused by the temperature difference between the inside and outside or local overheating, and providing a core guarantee for maintaining high gear shape precision and preventing stress spots;

[0073] The circumferentially sprayed cooling liquid wraps the gear tooth while forming an effective chip flushing barrier, which can flush the cutting chips generated during machining from the tooth groove in time, avoiding secondary damage to the machined tooth surface and wear of the tool.

[0074] In another embodiment, please refer to Figure 6 , the gear tooth machining part 550 includes a housing 551 fixed on the swing slide 540, a rotating drum 552 is rotatably installed in the housing 551, a tool bit 553 is arranged at one end of the rotating drum 552 facing the gear blank 600, and a machining driving part is connected to the end of the rotating drum 552 away from the tool bit 553;

[0075] Specifically, by driving the rotating drum 552 in the housing 551 to continuously rotate, the tool bit 553 at the end of the rotating drum 552 can be synchronously rotated, thereby realizing the machining of the gear tooth of the gear blank 600; during the machining process, the swing cylinder 520 drives the tool bit 553 to reciprocate in a certain interval in the vertical direction, and cooperates with the progressive feeding of the radial feeding unit 400, thereby realizing dynamic cutting of the gear tooth.

[0076] It is worth noting that the tool head 553 rotates at high speed under the driving of the machining driving member to complete the main cutting movement, and is driven by the swing cylinder 520 to swing back and forth in the vertical plane. This rotary-swing composite cutting mode makes the contact point, contact angle and cutting force direction of the cutting edge and the workpiece change continuously, completely breaks the periodic vibration caused by the traditional fixed path cutting, effectively eliminates the tooth surface vibration, and disperses the cutting stress to avoid stress concentration to form spots.

[0077] The superposition of the swing movement and the radial feed forms a complex and continuous multi-directional envelope cutting trajectory of the tool head 553 relative to the gear tooth groove, which not only can more accurately approach the theoretical tooth shape to obtain higher tooth shape accuracy and tooth direction accuracy, but also has a dynamic cutting process similar to fine grinding and polishing, which is helpful to directly obtain lower tooth surface roughness and better surface finish.

[0078] The swing cutting avoids the continuous full-load work of a single tool tooth or cutting edge on the tool head 553, uniformly distributes the cutting load to more cutting edges and a wider contact area, and the intermittent cutting caused by the swing provides transient air cooling time for the tool head 553, greatly improves the heat dissipation condition, thereby slowing down the tool wear and prolonging the service life of the tool head 553.

[0079] In addition, the change of the cutting force direction caused by the composite motion is helpful to break and discharge the chips, and the swing action can periodically sweep the chips from the cutting area, avoiding the risk of long chips winding around the tool head 553 or scratching the machined surface, ensuring the continuity and stability of the machining process and the integrity of the machined surface.

[0080] Further, please refer to Figure 6 and Figure 7 The machining driving member includes a first driving motor 560 fixed on the feed slide 420, a driving wheel 570 mounted on the output end of the first driving motor 560, a driven wheel 554 mounted on one end of the rotating drum 552, and a transmission belt 580 connected between the driving wheel 570 and the driven wheel 554.

[0081] Specifically, the first driving motor 560 drives the driving wheel 570 to rotate, which in turn drives the driven wheel 554 and the rotating drum 552 to rotate synchronously under the transmission of the transmission belt 580, thereby realizing the gear tooth machining of the gear blank 600 by the tool head 553.

[0082] Further, considering that the linear distance between the driven wheel 554 and the driving wheel 570 changes slightly when the swing cylinder 520 drives the gear machining member 550 to swing up and down, in order to ensure the stability of the power transmission of the transmission belt 580, please refer to Figure 7 and Figure 8The second mounting rack 510 is further provided with a tensioning piece 590 matched with the transmission belt 580, the tensioning piece 590 comprises a sliding groove 591 vertically arranged on the second mounting rack 510, a tensioning sliding block 592 is slidingly arranged in the sliding groove 591, a tensioning wheel 593 is rotatably arranged on the tensioning sliding block 592 and is in rolling contact with the transmission belt 580, and a tension spring 594 is arranged at the bottom of the sliding groove 591 and is connected with the tensioning sliding block 592.

[0083] Specifically, the tensioning wheel 593 is always capable of pulling the transmission belt 580 downwardly to be taut by the tension spring 594 continuously exerting downward tension on the tensioning sliding block 592, and when the swing cylinder 520 drives the tooth machining piece 550 to swing up and down, the tension spring 594 is capable of self-adapting deformation, so that the distance between the driven wheel 554 and the driving wheel 570 changes, the transmission belt 580 is always kept in a taut state, and the continuity and stability of power transmission between the machining driving piece and the tooth machining piece 550 are ensured.

[0084] It should be noted that the tensioning piece 590 continuously and self-adaptingly exerts tension on the tensioning wheel 593 through the tension spring 594, so that the transmission belt 580 is always kept in an optimal tensioning force when the distance between the driven wheel 554 and the driving wheel 570 changes due to swinging, the problem of relaxation, shaking or slipping of the transmission belt 580 caused by center distance fluctuation in swinging machining is solved, and the stability of the rotating speed of the tool head 553 is ensured.

[0085] The mechanism composed of the tension spring 594 and the sliding groove 591 can compensate the size chain fluctuation of the transmission system in real time, not only ensures the continuity of power transmission, but also avoids additional damage caused by the transmission belt 580 being too loose (slipping, wear) or too tight (stress fatigue, bearing damage).

[0086] By eliminating the change of cutting force caused by transmission fluctuation, the tool head 553 can keep consistent cutting linear speed and feeding force in each swinging cycle, effectively preventing the micro vibration lines, biting marks or local stress concentration on the tooth surface caused by cutting force fluctuation, thereby improving the tooth profile accuracy and surface integrity.

[0087] In further embodiments, please refer to Figure 9 and Figure 10 The reciprocating driving piece 430 comprises bearing seats 431 fixed at both ends of the base 100, a rotating shaft 432 is rotatably arranged between the two groups of bearing seats 431, a second driving motor 433 is arranged on one bearing seat 431 and is connected with the rotating shaft 432, a cam 434 is fixedly arranged on the rotating shaft 432, and a push-pull block 436 matched with the cam 434 is arranged on the feeding sliding table 420.

[0088] Specifically, the rotation of the rotating shaft 432 is driven by the second driving motor 433, so as to synchronously drive the circumferential rotation of the cam 434, and the convex part of the cam 434 is used to push the push-pull block 436, so as to realize the radial progressive feeding of the feeding slide 420 and the gear tooth machining piece 550 relative to the gear blank 600, and the progressive machining of the gear tooth is realized.

[0089] Further, please refer to Figure 10 , in order to realize the periodic automatic feeding and back-off of the gear tooth machining piece 550, the closed guide groove 435 is arranged in the cam 434, the connecting head 437 is arranged on the push-pull block 436, and the sliding pin 438 movably arranged in the closed guide groove 435 is arranged on the connecting head 437;

[0090] Specifically, when the cam 434 continuously rotates, the sliding pin 438 can adaptively move relative to the contour of the closed guide groove 435, when the sliding pin 438 gradually moves from the non-convex part to the convex part of the closed guide groove 435, the push-pull block 436 and the feeding slide 420 can be pushed away from the rotating shaft 432, so as to realize the radial feeding of the gear tooth machining piece 550; when the sliding pin 438 gradually moves from the convex part to the non-convex part of the closed guide groove 435, the push-pull block 436 and the feeding slide 420 can be pulled close to the rotating shaft 432, so as to realize the radial back-off of the gear tooth machining piece 550.

[0091] It should be noted that the continuous rotation of the second driving motor 433 is converted into the predetermined reciprocating linear motion of the feeding slide 420 by the contour of the closed guide groove 435 on the cam 434, the cam 434 and the push-pull block 436 constitute a high-rigid force-closed transmission pair through the cooperation of the closed guide groove 435 and the sliding pin 438, which eliminates the backlash, elastic deformation or gas pressure fluctuation that may exist in the traditional cylinder drive, so that the radial feeding process is stable and has strong anti-interference ability, and the tooth profile error or vibration caused by the micro-motion or drift of the feeding system is effectively prevented; the curve of the cam 434 can realize smooth acceleration change, which avoids the rigid impact during the feeding start and reversal, reduces the forced vibration during the machining process, and effectively prevents the micro-cracks or stress concentration on the tooth surface caused by the feeding impact.

[0092] The specific embodiments of the application are described above, but the application is not limited to the above specific embodiments, the above specific embodiments are only illustrative but not limiting, and those skilled in the art can make many forms under the inspiration of the application, which all belong to the protection of the application.

Claims

1. A coupling gear processing device for an encoder production, characterized by, The utility model relates to a gear tooth machining device, including: a base (100); a rotating bearing unit (200) comprising a rotating servo motor (210) vertically fixed on the base (100), the rotating servo motor (210) output end is equipped with the bearing bar (220) for placing gear blank (600); an axial pressing unit (300) comprising a first mounting frame (310) fixed on the base (100), the first mounting frame (310) top is equipped with the pressing cylinder (320), the pressing cylinder (320) output end is connected with the pressing bar (330) of bearing bar (220) adaptation, the pressing bar (330) is used for the axial location of gear blank (600); a radial feeding unit (400) comprising a feeding slide rail (410) and a reciprocating drive (430) arranged on the base (100), the feeding slide rail (410) is slidably installed with the feeding slide table (420) connected with the reciprocating drive (430); a gear tooth machining unit (500) comprising a second mounting frame (510) fixed on the feeding slide table (420) and a vertical guide rail (530) vertically installed on the second mounting frame (510), the vertical guide rail (530) is slidably installed with a swing slide table (540), the second mounting frame (510) top is equipped with the swing cylinder (520) for driving swing slide table (540), the swing slide table (540) is provided with gear tooth machining part (550); the bearing bar (220) top end is provided with the cavity (221) for accommodating gear blank (600), the cavity (221) is vertically fixed with the positioning rod (230) coaxially distributed in the bearing bar (220); the positioning rod (230) one side is provided with the positioning key (240) with the positioning groove (610) in gear blank (600) adaptation, the pressing bar (330) bottom is circumferentially movably embedded with a plurality of ball bearings (334) with the top surface of gear blank (600) adaptation; the pressing bar (330) top is further provided with the liquid storage cavity (340), one side of the liquid storage cavity (340) is connected with the liquid inlet pipe (341), the main flow passage (331) in communication with the liquid storage cavity (340) is axially penetrated in the pressing bar (330), the arc-shaped injection port (333) is set up on the side of the pressing bar (330) bottom towards gear tooth machining part (550), the bypass flow passage (332) in communication with the main flow passage (331) and the arc-shaped injection port (333) is set up in the pressing bar (330); the positioning rod (230) is slidably adapted with the main flow passage (331), the vice flow passage (231) in communication with the main flow passage (331) is axially set up in the positioning rod (230), the vice flow passage (231) bottom is in communication with the inside of the cavity (221), a plurality of injection holes (222) are circumferentially set up on the side wall of the cavity (221), the injection hole (222) outlet is inclined upward and towards the outer peripheral gear tooth area of gear blank (600).

2. The coupling gear machining device for encoder production according to claim 1, characterized in that, The gear tooth machining piece (550) comprises a shell (551) fixed on the swing sliding table (540), a rotating drum (552) is rotatably installed in the shell (551), a cutter head (553) is arranged at one end of the rotating drum (552) and faces the gear blank (600), and a machining driving piece is connected to the other end of the rotating drum (552) away from the cutter head (553).

3. The coupling gear machining device for encoder production according to claim 2, characterized in that, The machining driving piece comprises a first driving motor (560) fixed on the feeding sliding table (420), a driving wheel (570) is installed at the output end of the first driving motor (560), a driven wheel (554) is installed at one end of the rotating drum (552), and a transmission belt (580) is connected between the driving wheel (570) and the driven wheel (554).

4. The coupling gear machining device for encoder production according to claim 3, characterized in that, A tensioning piece (590) adapted to the transmission belt (580) is further installed on one side of the second mounting bracket (510), the tensioning piece (590) comprises a sliding groove (591) vertically formed on the second mounting bracket (510), a tensioning sliding block (592) is slidably embedded in the sliding groove (591), a tensioning wheel (593) rotatably installed on the tensioning sliding block (592) is in rolling contact with the transmission belt (580), and a tension spring (594) connected with the tensioning sliding block (592) is installed at the bottom of the sliding groove (591).

5. The coupling gear machining device for encoder production according to claim 1, characterized in that, The reciprocating driving piece (430) comprises a bearing seat (431) fixed on both ends of the base table (100), a rotating shaft (432) is rotatably installed between the two groups of bearing seats (431), a second driving motor (433) connected with the rotating shaft (432) is installed on one side bearing seat (431), a cam (434) is fixedly sleeved on the rotating shaft (432), and a push-pull block (436) adapted to the cam (434) is installed on the feeding sliding table (420).

6. The coupling gear machining device for encoder production according to claim 5, characterized in that, The cam (434) is internally provided with a closed guide groove (435), a connecting head (437) is installed on the push-pull block (436), and a sliding pin (438) movably embedded in the closed guide groove (435) is arranged on the connecting head (437).

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