A motor shaft fine grinding device for robot motor production

Abstract

The application relates to the technical field of precision grinding devices, in particular to a motor shaft precision grinding device for robot motor production. The device comprises an operation table, a second electric sliding rail is fixedly connected to the operation table, the second electric sliding rail is provided with symmetrically-distributed second electric sliding blocks, a supporting seat is fixedly connected to the second electric sliding blocks on the second electric sliding rail, symmetrically-distributed supporting seats are fixedly connected with fixing discs and motors, the fixing discs are rotationally connected with rotating discs, the output shafts of the motors are in gear transmission with the rotating discs, the rotating discs are fixedly connected with supporting rods, and the supporting rods are hingedly connected with circumferentially-uniformly-distributed top plates. The application adjusts the angles of different top plates on the rotating disc, when the top plates are abraded or the positioning holes have an error that cannot be ignored, the angles of the top plates are adjusted, the center points of the circumferentially-uniformly-distributed top plates are offset, and the central axis of the motor shaft is arranged at a position where the central axis coincides with the axes of the rotating discs on the two sides.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of precision grinding device, and particularly relates to a motor shaft precision grinding device for robot motor production. BACKGROUND

[0002] In the field of modern industrial robot manufacturing, the motor shaft is a core component of a precision electric control system, and the machining precision requirement is extremely strict. According to the current industry standard, the final machining precision of the motor shaft needs to be controlled within the range of 2-5 wires (i.e. 0.02-0.05 millimeters). To achieve this goal, the traditional process generally adopts the method of clamping the positioning hole of the motor shaft by a center pin clamp for precision grinding, and detects the pre-grinding pressure jump value of the shaft body at both ends by using a micrometer before machining, so as to evaluate the uniformity of the material allowance distribution. However, when the positioning hole of the motor shaft has an acceptable machining error (although there is an error, the error part can still be processed by the machining process, so the error part can still be processed), or the center pin clamp is slightly worn, the pressure jump detection value will abnormally increase, and the material allowance on one side of the shaft body is significantly more than that on the opposite side. This uneven distribution does not directly hinder precision grinding, but it significantly increases the process difficulty and reduces the precision grinding efficiency due to the excessive number of grinding parameters to be calculated and the number of times to be ground. More seriously, if the jump deviation exceeding the allowable range is detected and it is confirmed that the deviation is caused by the positioning hole error, the precision grinding process must be suspended and the positioning hole must be corrected first. However, since the shaft body has not been completed precision grinding at this time, the original diameter error is large, which makes the accurate correction of the positioning hole extremely difficult. This process repetition not only seriously affects the production rhythm, but also causes the generation of unusable waste products due to error accumulation, resulting in serious waste of production resources. SUMMARY

[0003] In order to overcome the shortcomings of the existing precision grinding device that cannot adjust the position of the motor shaft when the positioning hole of the motor shaft has a large machining error or the center pin clamp is worn, which increases the process difficulty due to the excessive single-side cutting amount and reduces the machining efficiency, the present application provides a motor shaft precision grinding device for robot motor production.

[0004] The technical scheme is: a motor shaft precision grinding device for robot motor production, comprising an operation table, the operation table is fixedly connected with a first electric sliding rail and a second electric sliding rail, the first electric sliding rail is provided with a grinding wheel through a first electric sliding block, the second electric sliding rail is provided with symmetrically distributed second electric sliding blocks, the second electric sliding blocks are fixedly connected with support seats, the support seats are fixedly connected with fixed discs and motors, the fixed discs are rotatably connected with rotating discs, the output shafts of the motors are in transmission with the rotating discs through gears, the rotating discs are fixedly connected with support rods, the support rods are hingedly connected with top plates which are uniformly distributed in the circumferential direction, the top plates are slidably connected with sliding blocks, the rotating discs are fixedly connected with first hydraulic push rods which are uniformly distributed in the circumferential direction and correspond to the top plates one by one, the extension ends of the first hydraulic push rods are hingedly connected with the corresponding sliding blocks, and the support seats are provided with a liquid supply mechanism for supplying liquid to the first hydraulic push rods on the adjacent rotating discs.

[0005] Further, the liquid supply mechanism comprises an injection part fixedly connected to the lower side of the fixed disc, the rotating discs are provided with communication cavities and communication channels which are uniformly distributed in the circumferential direction and correspond to the top plates one by one, the communication cavities are in communication with the adjacent communication channels, the communication channels are in communication with the adjacent first hydraulic push rods, the communication channels are provided with one-way valves, the injection part is provided with communication holes which are spaced apart, the communication holes in the injection part are fixedly connected with communication pipes, the communication holes are in communication with the adjacent communication cavities, and the support seats are provided with a liquid extraction assembly for simultaneously extracting hydraulic oil in all the first hydraulic push rods on the adjacent rotating discs.

[0006] Further, the communication cavities are arc cavities, the injection part is an arc plate, all the communication holes in the injection part are distributed along an arc line, the curvature of the communication cavities is not greater than the curvature of the injection part, and the injection part cannot be in communication with three communication cavities at the same time.

[0007] Further, the diameter of the communication hole is smaller than the minimum distance between two adjacent communication cavities.

[0008] Further, the liquid extraction assembly comprises a communication pipe slidably connected in the support seat, the communication pipe is rotatably connected with a sealing plate, the sealing plate is in sealing sliding connection with the rotating disc, the rotating disc is provided with pressure relief channels which are uniformly distributed in the circumferential direction and correspond to the top plates one by one, the communication pipe and the communication channel are in communication with the adjacent pressure relief channels, the sealing plate is used for sealing all the pressure relief channels on the adjacent rotating discs, and the support seat is provided with a control assembly for controlling the movement of the communication pipe.

[0009] Further, the control assembly comprises a first electromagnet fixedly connected to the support base, and the communication pipe is fixedly connected with a first magnetic attraction element, and the first electromagnet and the first magnetic attraction element are magnetically attracted to each other.

[0010] Further, the top plate is detachably connected with symmetrically distributed support strips.

[0011] Further, the auxiliary fixing assembly is arranged on the rotating disc, and the auxiliary fixing assembly comprises circumferentially spaced auxiliary fixing rods, the auxiliary fixing rods are slidably connected to adjacent rotating discs, the auxiliary fixing rods are fixedly connected with rubber heads and second magnetic attraction elements, the rubber heads are used for pressing the motor shaft, the support base is fixedly connected with a second hydraulic push rod, the second hydraulic push rod is fixedly connected with a second electromagnet at the telescopic end, and the second magnetic attraction element and the second electromagnet are magnetically attracted to each other.

[0012] Further, all the auxiliary fixing rods on the same rotating disc and all the top plates are staggered.

[0013] Further, the second electric sliding rail is slidably connected with symmetrically distributed third electric sliding blocks, the second electric sliding rail is fixedly connected with support frames at the third electric sliding blocks, the support frames are provided with vertical support elements and horizontal support elements, and the spaced support frames are used for supporting the motor shaft and applying a support force opposite to the grinding wheel to the motor shaft.

[0014] The present application has the following advantages: by adjusting the angles of different top plates on the rotating disc, when the top plates are worn or the positioning holes have an error that cannot be ignored, the center points of the circumferentially uniformly distributed top plates are offset by adjusting the angles of the top plates, the positions of the adjacent positioning holes clamped and positioned by the top plates are adjusted, the central axis of the motor shaft is placed to coincide with the axes of the two rotating discs, thereby reducing the process difficulty when the motor shaft is precisely ground, and improving the processing efficiency; when the offset is caused by the positioning hole error, the motor shaft is first placed to be ground, and then the accurate diameter after grinding is used as a reference to correct the positioning hole error of the motor shaft, so that the work of correcting the positioning hole of the motor shaft is more accurate, and the probability of scrapping the motor shaft due to the error is reduced.

[0015] By arranging the communication relationship between the injection element and the adjacent communication cavity, it is not necessary to determine which first hydraulic push rod needs to work through a complex control program, and only the position where the motor shaft pressure fluctuation is the largest is moved to the position of the injection element, and the hydraulic oil is directly injected into the injection element, so that the deflection direction of the axis of the motor shaft can be adjusted, and the operation process is simple and effective, and easy for workers to understand and operate.

[0016] The application increases the fixing effect of the top plate on the motor shaft by assisting the fixing of the rubber head on the rod, reduces the probability of the motor shaft slipping relative to the top plate, and thus increases the accuracy and reliability in the fine grinding process. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the application;

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the application;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the second electric sliding rail and support seat of the application;

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the fixed disc and rotating disc of the application;

[0021] Figure 5 It is a sectional view of the top plate of the application;

[0022] Figure 6 It is an exploded view of the top plate and sliding block of the application;

[0023] Figure 7 It is a sectional view of the fixed disc and rotating disc of the application;

[0024] Figure 8 It is an exploded view of the injection part and rotating disc of the application;

[0025] Figure 9 It is a schematic diagram of the three-dimensional structure of the communication pipe and blocking plate of the application;

[0026] Figure 10 It is a sectional view of the communication pipe and blocking plate of the application;

[0027] Figure 11 It is a schematic diagram of the three-dimensional structure of the support frame of the application.

[0028] Corresponding reference numerals in the drawings indicate corresponding parts throughout the several aspects: 1, operation table, 11, first electric sliding rail, 12, second electric sliding rail, 13, abrasive wheel, 14, grinding fluid spray head, 15, support frame, 2, support seat, 21, fixed disc, 22, rotating disc, 23, support rod, 3, top plate, 31, sliding block, 32, first hydraulic push rod, 33, support strip, 4, communication cavity, 41, through flow channel, 42, one-way valve, 43, blocking part, 44, pressure relief flow channel, 5, injection part, 51, through hole, 52, through pipe, 6, electric motor, 7, communication pipe, 71, blocking plate, 72, first electromagnet, 73, first magnetic attraction part, 8, auxiliary fixing rod, 81, rubber head, 82, second magnetic attraction part, 83, second electromagnet, 84, second hydraulic push rod. DETAILED DESCRIPTION

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1:

[0031] This embodiment discloses a motor shaft precision grinding device for robot motor production, used to precision grind various types of motor shafts required for robot motor production.

[0032] Reference Figures 1-3 The precision grinding device includes an operating table 1, on which a first electric slide rail 11 and a second electric slide rail 12 (see reference) are fixedly connected to each other perpendicularly. Figure 2 and Figure 3 The first electric slide rail 11 is equipped with a grinding wheel 13 via a first electric slider (the grinding wheel 13 is equipped with an adjustment module for detecting the pressure between it and the motor shaft; the adjustment module is an existing device and is not shown in the figure). A grinding fluid nozzle 14 is installed on the grinding wheel 13. The second electric slide rail 12 is equipped with two symmetrical second electric sliders. Both second electric sliders on the second electric slide rail 12 are fixedly connected to support seats 2. During the fine grinding process, the two support seats 2 synchronously drive the motor shaft to move in the left and right directions. The first electric slider on the first electric slide rail 11 drives the grinding wheel 13 and the grinding fluid nozzle 14 to move in the radial direction of the motor shaft to perform fine grinding on the motor shaft.

[0033] The specific structure and connection relationship of the above components are as follows:

[0034] Support 2:

[0035] Reference Figures 4-7 and Figure 9 Both support bases 2 are fixedly connected to a fixed disk 21 and a motor 6 (the motor 6 is an existing device, and its model and structure will not be described in detail). The two fixed disks 21 are located between the two support bases 2, and a rotating disk 22 is rotatably connected to the opposite sides of each fixed disk 21. The output shaft of the motor 6 is connected to the rotating disk 22 via gear transmission (see reference). Figure 9 Each of the two rotating disks 22 has a support rod 23 fixedly connected to its opposite side. The two support rods 23 and the two rotating disks 22 are on the same axis. The end of the support rod 23 away from the adjacent rotating disk 22 is hinged to three circumferentially evenly distributed top plates 3. The top plates 3 on the same rotating disk 22 form a group. The top plates 3 are slidably connected to sliders 31 (see reference). Figure 5 and Figure 6), the slider 31 is located on one side of the adjacent top plate 3 close to the adjacent rotating disc 22, and the top plate 3 is detachably connected with two symmetrical support strips 33 (refer to Figure 6 ), the rotating disc 22 is fixedly connected with three first hydraulic push rods 32 which are uniformly distributed in the circumference and correspond to the top plate 3 one by one, and the telescopic end of the first hydraulic push rod 32 is hinged to the corresponding slider 31 (refer to Figure 5 and Figure 6 ), and the support base 2 is provided with a liquid supply mechanism for supplying liquid to the first hydraulic push rod 32 on the adjacent rotating disc 22.

[0036] The above arrangement can realize that all the top plates 3 in the same group are used to position the position of the motor shaft positioning hole; the second electric sliding rail 12 drives the two support bases 2 to move oppositely through the two second electric sliding blocks thereon, so that the two groups of top plates 3 clamp the motor shaft and position the motor shaft through the positioning hole of the motor shaft, and the second electric sliding rail 12 can also drive the two support bases 2 to move in the same direction through the two second electric sliding blocks thereon, thereby driving the clamped motor shaft to move together; the grinding liquid nozzle 14 is used to spray grinding liquid to the polished part of the motor shaft; when the first hydraulic push rod 32 is filled with hydraulic oil, the telescopic end of the first hydraulic push rod 32 drives the slider 31 to move to one side of the adjacent rotating disc 22, so that the slider 31 drives the adjacent top plate 3 to swing to the direction close to the adjacent support rod 23, thereby adjusting the position between the shaft center of the group of top plates 3 and the motor shaft positioning hole, and correcting the position of the axis of the motor shaft; the support strip 33 is used to support the motor shaft positioning hole, and because the support strip 33 is designed to be detachable, it can be quickly replaced after wear.

[0037] Liquid supply mechanism:

[0038] Refer to Figures 7-10 , the liquid supply mechanism comprises a one-way valve 42, an injection part 5 and a liquid pumping assembly.

[0039] One-way valve 42 and injection part 5:

[0040] Refer to Figures 7-10 , the injection part 5 is fixedly connected to the lower side of the fixed disc 21, the rotating disc 22 is provided with three communication cavities 4 and three communication flow channels 41 which are uniformly distributed in the circumference and correspond to the top plate 3 one by one (refer to Figure 7 and Figure 8 ), the communication cavity 4 communicates with the adjacent communication flow channel 41, the communication flow channel 41 communicates with the side of the adjacent first hydraulic push rod 32 away from the adjacent rotating disc 22, and the communication flow channel 41 is provided with a one-way valve 42 (the one-way valve 42 is an existing device), and the injection part 5 is provided with interval distributed communication holes 51 (refer to Figure 8 and Figure 10), the injection part 5 is fixedly connected with and communicates with a through hole 51, and the through hole 51 communicates with the communication cavity 4 located at the lower side of the rotating disc 22.

[0041] With reference to Figures 8-10 , the communication cavity 4 is an arc-shaped cavity (with reference to Figure 8 ), the blocking part 43 is located between two adjacent communication cavities 4, the injection part 5 is an arc-shaped plate, all the through holes 51 on the injection part 5 are distributed along an arc line, and the injection part 5 cannot simultaneously communicate with three communication cavities 4 (i.e., all the through holes 51 on the injection part 5 cannot simultaneously communicate with three communication cavities 4), and the diameter of the through hole 51 is smaller than the minimum distance between two adjacent communication cavities 4 (with reference to Figure 8 , i.e., the width of the blocking part 43).

[0042] The above arrangement can realize that the injection part 5 injects liquid into the communication cavity 4 located at the lower side of the rotating disc 22, so that the first hydraulic push rod 32 located at the lower side of the rotating disc 22 is retracted, the convenience of adjusting the same group of top plates 3 is increased, i.e., the top plate 3 located at the lower side is controlled to swing upward, the axis of the motor shaft is driven to swing upward, the complexity of adjusting the same group of top plates 3 is reduced, the hydraulic oil in the through flow channel 41 can only pass through the one-way valve 42 in the direction close to the adjacent communication cavity 4 and flow to the side away from the communication cavity 4, and cannot flow in the reverse direction through the one-way valve 42, the relationship between the radian of the injection part 5 and the radian of the communication cavity 4 is limited, so that the injection part 5 cannot simultaneously communicate with three communication cavities 4, one through hole 51 cannot simultaneously communicate with two communication cavities 4, and when the injection part 5 simultaneously communicates with two communication cavities 4, different amounts of hydraulic oil are injected into the two communication cavities 4 according to the area proportion of the two communication cavities 4 and the injection part 5.

[0043] With reference to Figures 7-10 , the liquid extraction assembly includes a communication pipe 7, a blocking plate 71 and a control assembly.

[0044] The communication pipe 7 and the blocking plate 71:

[0045] With reference to Figures 7-10 , the communication pipe 7 is slidingly connected in the support seat 2, the communication pipe 7 is rotationally connected with the blocking plate 71, the blocking plate 71 is sealingly and slidingly connected with the rotating disc 22, and the rotating disc 22 is provided with circumferentially uniformly distributed pressure relief flow channels 44 (with reference to Figure 8 and Figure 9 ) corresponding to the through flow channels 41, the pressure relief flow channels 44 communicate with the adjacent through flow channels 41, and the communication position of the pressure relief flow channels 44 and the through flow channels 41 is located on the side away from the adjacent communication cavity 4 of the one-way valve 42 (with reference to Figure 9 ), and when the blocking plate 71 does not block the adjacent pressure relief flow channels 44, the communication pipe 7 communicates with all the pressure relief flow channels 44.

[0046] The control assembly comprises a first electromagnet 72 and a first magnetic attraction member 73, the first magnetic attraction member 73 is a permanent magnet, the first electromagnet 72 is fixedly connected in the support base 2, the first magnetic attraction member 73 is fixedly connected outside the communication pipe 7, the first magnetic attraction member 73 slides with the communication pipe 7 relative to the adjacent support base 2 in the left-right direction, and the first electromagnet 72 and the first magnetic attraction member 73 are magnetically attracted to each other.

[0047] Referring to Figure 9 and Figure 10 , the control assembly comprises a first electromagnet 72 and a first magnetic attraction member 73, the first magnetic attraction member 73 is a permanent magnet, the first electromagnet 72 is fixedly connected in the support base 2, the first magnetic attraction member 73 is fixedly connected outside the communication pipe 7, the first magnetic attraction member 73 slides with the communication pipe 7 relative to the adjacent support base 2 in the left-right direction, and the first electromagnet 72 and the first magnetic attraction member 73 are magnetically attracted to each other.

[0048] The above arrangement can achieve that the blocking plate 71 is used for blocking all pressure relief flow channels 44 on the adjacent rotating disc 22, the pressure relief flow channel 44 is used for discharging hydraulic oil in the first hydraulic push rod 32, and the blocking plate 71 is used for controlling the timing of discharging the hydraulic oil in the first hydraulic push rod 32 by the pressure relief flow channel 44. At the same time, the hydraulic system can make the extension end of the same group of first hydraulic push rods 32 contract at the same time by injecting hydraulic oil into the communication pipe 7, adjust the taper of the same group of top plates 3 as a whole, and make the same group of top plates 3 can adapt to more kinds and diameters of positioning holes.

[0049] The working principle of the motor shaft fine grinding device in the embodiment is as follows:

[0050] Fine grinding preparation stage:

[0051] First, start the two first electromagnets 72, the first electromagnet 72 releases the repulsive force to the adjacent first magnetic attraction member 73, so that the first magnetic attraction member 73 drives the communication pipe 7 and the blocking plate 71 to move, the blocking plate 71 blocks the adjacent pressure relief flow channel 44, then the motor shaft is placed between the two groups of top plates 3, and the two second electric sliding blocks on the second electric sliding rail 12 are controlled to drive the two support bases 2 and the top plates 3 thereon to move oppositely, until the two groups of top plates 3 are inserted into the positioning holes on both sides of the motor shaft, and the motor shaft is clamped by the support strips 33 pressing the positioning holes, then the two second electric sliding rails 12 are closed, the two electric motors 6 are started, and the two adjacent rotating discs 22 are driven to rotate in the same direction, and the motor shaft is driven to rotate by the two groups of top plates 3.

[0052] During the rotation of the motor shaft, the pressure jump value of the motor shaft at both ends is detected by using a dial gauge, the uniformity of the material allowance distribution of the motor shaft is judged, if the pressure jump value of one side of the motor shaft is large at this time, for example, the pressure jump value of the left motor shaft is large, and the pressure jump value of the right motor shaft is small, it is possible that the left top plate 3 is slightly worn, the positioning hole on the left side of the motor shaft is deflected, and the center axis of the motor shaft is slightly deflected, at this time, the motor shaft is controlled to rotate to the lowermost side at the position where the pressure jump is the largest, and the two electric motors 6 are closed.

[0053] After rotating the motor shaft to the maximum pressure jump to the lower side, turn off the two motors 6, stop the motor shaft, at this time the right side of the top plate 3 remains in place, only the left side of the top plate 3 and the adjacent parts are taken as an example: control the hydraulic system to inject hydraulic oil into all the through pipes 52, at this time if all the through pipes 52 are communicated with a communication cavity 4, all the hydraulic oil is injected into the communication cavity 4, the hydraulic oil is guided to flow into the first hydraulic push rod 32 from the communication cavity 4 and the through flow channel 41, the telescopic end of the first hydraulic push rod 32 retracts inward, driving the slider 31 to move left, the slider 31 drives the left end of the top plate 3 on the lower side to swing upward, when the left end of the top plate 3 swings upward to a certain angle (the value of the swing of the top plate 3 is positively related to the value of the jump detection, that is, the greater the jump amplitude in the jump detection, the greater the angle of the swing of the top plate 3), the hydraulic system stops injecting hydraulic oil into all the through pipes 52, at this time the motor shaft is supported by the top plate 3 on the upper side which does not swing and does not move.

[0054] If all the through pipes 52 are communicated with two communication cavities 4, all the through pipes 52 inject hydraulic oil into the two communication cavities 4 respectively, the communication cavity 4 which is communicated with more through pipes 52 injects more hydraulic oil, the corresponding top plate 3 swings with a larger amplitude, and the other communication cavity 4 injects less hydraulic oil, the corresponding top plate 3 swings with a smaller amplitude, thereby ensuring that the swing angle of the axis of the motor shaft is mainly adjusted in the up-down direction, and reducing the swing amplitude of the axis of the motor shaft in the front-back direction.

[0055] When the hydraulic system stops injecting hydraulic oil into all the through pipes 52, control the two second electric sliding blocks on the second electric sliding rail 12 to drive the two support seats 2 and the top plates 3 thereon to move oppositely again, the two groups of top plates 3 clamp and position the positioning holes again, at this time the top plates 3 on the right side remain in place with the motor shaft positioning hole, and the left motor shaft positioning hole is offset upward under the extrusion of the top plates 3 on the left side, so that the axis of the motor shaft is offset to a more horizontal state.

[0056] When the motor shaft is clamped again, the two motors 6 need to be restarted, and the pressure jump detection of the two ends of the motor shaft needs to be performed, when the pressure jump detection of the two ends is uniform, it means that the axis of the motor shaft has been successfully calibrated, and the preparation process is completed.

[0057] Fine grinding stage:

[0058] First, the grinding fluid is injected into the grinding fluid nozzle 14, so that the grinding fluid nozzle 14 sprays the grinding fluid to the polished part of the motor shaft, then the motor shaft is intermittently moved from left to right by the two second electric sliding blocks and the two support seats 2 on the second electric sliding rail 12, the first electric sliding block on the first electric sliding rail 11 drives the abrasive wheel 13 to move in the front-back direction, controls the pressure between the abrasive wheel 13 and the motor shaft, and fine grinds the motor shaft from left to right.

[0059] End stage:

[0060] After the fine grinding is completed, the grinding fluid is stopped from being supplied to the grinding fluid spray head 14, and the first motorized sliding block on the first motorized sliding rail 11 is controlled to drive the grinding wheel 13 away from the motor shaft. Then, pressure jump detection is performed again at each position of the motor shaft to ensure that the product precision is within the specified range.

[0061] Finally, the two second motorized sliding blocks on the second motorized sliding rail 12 are controlled to drive the two support seats 2 to move back to the original position, and the two first electromagnets 72 are controlled to change the magnetic properties. The first electromagnet 72 attracts the adjacent first magnetic member 73, which in turn drives the communication pipe 7 and the blocking plate 71 to move together. The blocking plate 71 unblocks the adjacent pressure relief flow channel 44. At this time, the hydraulic system draws out the hydraulic oil in all the first hydraulic push rods 32 through the communication pipe 7, the pressure relief flow channel 44, and the through-flow channel 41, and then resets the telescopic end of the first hydraulic push rod 32, the sliding block 31, and the top plate 3, completing the entire fine grinding process of the motor shaft.

[0062] In the case where the motor shaft positioning hole has a large error and causes a large pressure jump value on one side of the motor shaft, the device can still ensure the required precision during fine grinding according to the above working process. After fine grinding is completed, the positioning hole still needs to be calibrated and corrected without affecting the subsequent processing process. Because the diameter of the motor shaft has been fine ground to the precise size, it is easier to reduce the error range of the positioning hole when correcting the position of the positioning hole based on the diameter of the motor shaft.

[0063] Embodiment 2

[0064] This embodiment discloses a specific structure of a motor shaft fine grinding device for robot motor production based on embodiment 1. Compared with embodiment 1, this embodiment also has the function of assisting in supporting the motor shaft.

[0065] According to the motor shaft fine grinding device for robot motor production of this embodiment, the rotating disc 22 of embodiment 1 is also provided with an auxiliary fixing structure. The specific component structure and movement principle of embodiment 1 are not described again in this embodiment, and the focus is on describing the auxiliary fixing assembly.

[0066] Referring to Figure 4 , Figure 5 , Figure 7 and Figure 9 , the auxiliary fixing assembly includes circumferentially spaced auxiliary fixing rods 8 that are slidingly connected to adjacent rotating discs 22. The two ends of each auxiliary fixing rod 8 are fixedly connected with a rubber head 81 and a second magnetic member 82 (refer to Figure 7The second magnetic chuck 82 is located on the side of the auxiliary fixing rod 8 closest to the adjacent fixing plate 21. All the auxiliary fixing rods 8 and all the top plates 3 on the same rotating plate 22 are staggered (see reference). Figure 4 and Figure 5 The rubber head 81 is made of an elastic material (e.g., rubber). A second hydraulic push rod 84 is fixedly connected to the support base 2. The second hydraulic push rod 84 is connected to the existing hydraulic system. A second electromagnet 83 is fixedly connected to the telescopic end of the second hydraulic push rod 84. The second electromagnet 83 is a ring magnet (see reference). Figure 4 The inner diameter of the second electromagnet 83 is larger than the outer diameter of the rotating disk 22, and the second magnetic attractor 82 and the second electromagnet 83 are magnetically attracted to each other.

[0067] The above setup enables the following: the second electromagnet 83 pushes the second magnetic suction component 82 to move through magnetic repulsion, causing the auxiliary fixing rods 8 and rubber heads 81 on both sides to clamp the motor shaft by compression. While pushing the auxiliary fixing rods 8, which rotate together with the rotating disk 22, to move, there is no friction between the second electromagnet 83 and the second magnetic suction component 82, so there is no wear. The auxiliary fixing rods 8 and rubber heads 81 assist the adjacent top plates 3 in clamping the motor shaft by compression, and the rubber heads 81 increase the force of the rotating disk 22 to drive the motor shaft to rotate, thereby reducing the probability of relative movement between the top plate 3 and the motor shaft during fine grinding.

[0068] Reference Figure 2 , Figure 3 and Figure 11 Two third electric sliders are slidably connected to the second electric slide rail 12. The two third electric sliders are located between the two second electric sliders. A support frame 15 is fixed to the third electric sliders on the second electric slide rail 12. The support frame 15 is provided with a vertical support and a horizontal support. Both the vertical support and the horizontal support are existing devices. The vertical support is a combination of an electric push rod and a support plate, and the horizontal support is a combination of an electric push rod and a ball.

[0069] The above setup enables the following: the vertical support members on the two support frames 15 are used together to support the motor shaft. During the adjustment of the top plate 3, the electric push rod on the vertical support member is controlled to extend upward, so that the support plate bears part of the weight of the motor shaft, thereby reducing the gravity that the upper top plate 3 needs to bear. After the top plate 3 is adjusted and the motor shaft is re-clamped, the electric push rod on the vertical support member is controlled to move and reset. When the motor shaft is finely ground, the electric push rod on the horizontal support member drives the ball to contact the motor shaft, applying a support force opposite to that applied by the grinding wheel 13 to the motor shaft, reducing the probability of the motor shaft being misaligned. At the end of the fine grinding stage, the electric push rod on the horizontal support member is controlled to move and reset.

[0070] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A motor shaft fine grinding device for robot motor production, characterized by, The utility model provides an operating platform (1) is provided with first electric slide rail (11) and second electric slide rail (12), first electric slide rail (11) is provided with sanding wheel (13) through first electric slide block, second electric slide rail (12) is provided with symmetrical distribution's second electric slide block, and second electric slide rail (12) is provided with support seat (2) through second electric slide block, wherein symmetrical distribution's support seat (2) is provided with fixed disc (21) and motor (6) fixedly, fixed disc (21) is rotatably connected with rotary disc (22), and the output shaft of motor (6) is connected with rotary disc (22) through gear transmission, rotary disc (22) is provided with support rod (23), support rod (23) is hingedly connected with circumferentially even distribution's roof (3), roof (3) is slidably connected with slide block (31), rotary disc (22) is provided with circumferentially even distribution's and with roof (3) one to one's first hydraulic push rod (32), and the telescopic end of first hydraulic push rod (32) is hingedly connected with corresponding slide block (31), and support seat (2) is provided with liquid supply mechanism for supplying liquid to first hydraulic push rod (32) on adjacent rotary disc (22); The liquid supply mechanism comprises an injection member (5) fixed to the underside of the fixed disc (21), the rotary disc (22) is provided with circumferentially even distribution's communication cavity (4) and circumferentially even distribution's through-flow channel (41), the communication cavity (4) and the through-flow channel (41) are one to one corresponding to the roof (3), the communication cavity (4) is in communication with the adjacent through-flow channel (41), the through-flow channel (41) is in communication with the adjacent first hydraulic push rod (32), the through-flow channel (41) is provided with a one-way valve (42), the injection member (5) is provided with interval distribution's through-flow hole (51), the through-flow hole (51) in the injection member (5) is fixedly connected and communicated with a through-flow pipe (52), the through-flow hole (51) is in communication with the adjacent communication cavity (4), and the support seat (2) is provided with a liquid pumping assembly for simultaneously pumping hydraulic oil in all the first hydraulic push rods (32) on the adjacent rotary disc (22); The communication cavity (4) is an arc-shaped cavity, the injection member (5) is an arc-shaped plate, all the through-flow holes (51) on the injection member (5) are distributed along an arc line, the curvature of the communication cavity (4) is not greater than the curvature of the injection member (5), and the injection member (5) cannot be in communication with three communication cavities (4) at the same time.

2. The motor shaft fine grinding device for robot motor production according to claim 1, characterized in that, The diameter of the through-flow hole (51) is smaller than the minimum distance between two adjacent communication cavities (4).

3. The motor shaft fine grinding device for robot motor production of claim 1, wherein, The liquid pumping assembly comprises a communication pipe (7) which is slidingly connected in the support base (2), the communication pipe (7) is rotationally connected with a blocking plate (71), the blocking plate (71) is sealingly and slidingly connected with the rotating disc (22), the rotating disc (22) is provided with circumferentially uniformly distributed pressure relief flow channels (44), the pressure relief flow channels (44) correspond to the top plate (3) one by one, the communication pipe (7) and the communication flow channel (41) are both in communication with the adjacent pressure relief flow channels (44), the blocking plate (71) is used for blocking all the pressure relief flow channels (44) on the adjacent rotating disc (22), and the support base (2) is provided with a control assembly for controlling the movement of the communication pipe (7).

4. The motor shaft fine grinding device for robot motor production according to claim 3, characterized in that, The control assembly comprises a first electromagnet (72) which is fixedly connected in the support base (2), the communication pipe (7) is fixedly connected with a first magnetic attraction member (73), and the first electromagnet (72) and the first magnetic attraction member (73) are magnetically attracted to each other.

5. The motor shaft fine grinding device for robot motor production of claim 1, wherein, The top plate (3) is detachably connected with symmetrically distributed support strips (33).

6. The motor shaft fine grinding device for robot motor production of claim 3, wherein, The auxiliary fixing assembly is further provided on the rotating disc (22), the auxiliary fixing assembly comprises circumferentially spaced auxiliary fixing rods (8), the auxiliary fixing rods (8) are slidingly connected on the adjacent rotating disc (22), the auxiliary fixing rods (8) are fixedly connected with rubber heads (81) and second magnetic attraction members (82), the rubber heads (81) are used for extruding the motor shaft, the support base (2) is fixedly connected with a second hydraulic push rod (84), the second hydraulic push rod (84) is fixedly connected with a second electromagnet (83) at the telescopic end, and the second magnetic attraction member (82) and the second electromagnet (83) are magnetically attracted to each other.

7. The motor shaft fine grinding device for robot motor production according to claim 6, characterized in that, All the auxiliary fixing rods (8) on the same rotating disc (22) and all the top plates (3) are staggered.

8. The motor shaft fine grinding device for robot motor production of claim 1, wherein, The second electric sliding rail (12) is slidingly connected with symmetrically distributed third electric sliding blocks, the third electric sliding blocks on the second electric sliding rail (12) are fixedly connected with support frames (15), the support frames (15) are provided with vertical support members and horizontal support members, and the support frames (15) are spaced apart and are used for supporting the motor shaft and applying a support force opposite to the grinding wheel (13) to the motor shaft.

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