Motor shaft accurate grinding device for robot motor production

Abstract

The invention relates to the technical field of accurate grinding devices, in particular to a motor shaft accurate grinding device for robot motor production. Comprising an operation table, a second electric sliding rail is fixedly connected to the operation table, second electric sliding blocks which are symmetrically distributed are arranged on the second electric sliding rail, supporting bases are fixedly connected to the second electric sliding blocks on the second electric sliding rail, the supporting bases which are symmetrically distributed are fixedly connected with fixing discs and motors, the fixing discs are rotationally connected with rotating discs, and the rotating discs are fixedly connected with the motors. An output shaft of the motor is in transmission with the rotating disc through a gear, the rotating disc is fixedly connected with a supporting rod, and the supporting rod is hinged to top plates which are evenly distributed in the circumferential direction. By adjusting the angles of different top plates on the rotating discs, when the top plates are abraded or positioning holes have non-negligible errors, the center points of the top plates which are uniformly distributed in the circumferential direction are shifted by adjusting the angles of the top plates, and the central axis of a motor shaft is swung to the position where the central axis coincides with the axes of the rotating discs on the two sides.

Description

Technical Field

[0001] The present invention relates to the technical field of fine grinding devices, and in particular to a motor shaft fine grinding device for robot motor production. Background Art

[0002] In the field of modern industrial robot manufacturing, the motor shaft, as a core component of the precision electronic control system, has extremely strict machining accuracy requirements. Current industry standards stipulate that the final machining accuracy of the motor shaft must be controlled within the range of 2-5 wires (i.e., 0.02-0.05 mm). To achieve this goal, traditional processes generally use a pin fixture to clamp the motor shaft positioning hole for fine grinding. Before processing, a micrometer is used to measure the pre-grinding pressure runout value at both ends of the shaft to evaluate the uniformity of the material allowance distribution. However, when the motor shaft positioning hole has an acceptable machining error (although the error exists, it can be corrected through the machining process, so the error component can still be processed), or when the pin fixture is slightly worn, the pressure runout detection value will cause an abnormal increase. At this time, the material allowance on one side of the shaft is significantly greater than that on the opposite side. Although this uneven distribution does not directly hinder the fine grinding process, it will significantly increase the process difficulty due to the excessive number of grinding parameters and grinding times required, resulting in a decrease in fine grinding efficiency. What is more serious is that if a runout deviation beyond the allowable range is detected and confirmed to be caused by the positioning hole error, the fine grinding process must be suspended and the positioning hole must be corrected first. However, since the shaft has not yet been fine-ground, the original diameter error is large, which makes the accurate correction of the positioning hole extremely difficult. This repetitive process not only seriously affects the production rhythm, but also generates unusable waste due to the accumulation of errors, resulting in a serious waste of production resources. Summary of the Invention

[0003] In order to overcome the shortcomings of existing fine grinding devices that are unable to adjust the position of the motor shaft when the machining error of the motor shaft positioning hole is large or the ejector fixture is worn, resulting in excessive single-sided cutting, which increases the process difficulty and reduces the machining efficiency, the present invention provides a motor shaft fine grinding device for robot motor production.

[0004] The technical solution is: a motor shaft fine grinding device for robot motor production, including an operating table, the operating table is fixedly connected to a first electric slide rail and a second electric slide rail, a grinding wheel is installed on the first electric slide rail through a first electric slider, the second electric slide rail is provided with a symmetrically distributed second electric slider, the second electric slide rail is fixedly connected to a support seat, the symmetrically distributed support seats are all fixedly connected to a fixed plate and an electric motor, the fixed plate is rotatably connected to the rotating plate, the output shaft of the electric motor and the rotating plate are transmitted through a gear, the rotating plate is fixedly connected to a support rod, the support rod is hinged with a top plate evenly distributed in the circumference, the top plate is slidably connected with a slider, the rotating plate is fixed with a first hydraulic push rod evenly distributed in the circumference and corresponding to the top plate, the telescopic end of the first hydraulic push rod is hinged with the corresponding slider, and a liquid supply mechanism is provided on the support seat for supplying liquid to the first hydraulic push rod on the adjacent rotating plate.

[0005] Furthermore, the liquid supply mechanism includes an injection piece, which is fixed to the lower side of the fixed disk, and the rotating disk is provided with a connecting cavity and a conducting flow channel that are evenly distributed circumferentially. The connecting cavity and the conducting flow channel both correspond to the top plate one by one, and the connecting cavity is connected to the adjacent conducting flow channel, and the conducting flow channel is connected to the adjacent first hydraulic push rod. A one-way valve is provided in the conducting flow channel, and the injection piece is provided with conducting holes distributed at intervals. A conducting pipe is fixed and connected to the conducting hole on the injection piece, and the conducting hole is connected to the adjacent connecting cavity. The support seat is provided with a liquid extraction component that simultaneously extracts the hydraulic oil in all the first hydraulic push rods on the adjacent rotating disk.

[0006] Furthermore, the connecting cavity is an arc-shaped cavity, the injection piece is an arc-shaped plate, all the conducting holes on the injection piece are distributed along an arc line, the curvature of the connecting cavity is not greater than the curvature of the injection piece, and the injection piece will not be connected to three connecting cavities at the same time.

[0007] Furthermore, the diameter of the conducting hole is smaller than the minimum distance between two adjacent communicating cavities.

[0008] Furthermore, the liquid pumping component includes a connecting pipe, which is slidably connected to the support seat, and the connecting pipe is rotatably connected to a sealing plate, and the sealing plate is sealingly and slidably connected to the rotating disk. The rotating disk is provided with pressure relief channels evenly distributed in the circumference, and the pressure relief channels correspond one-to-one with the top plate. The connecting pipe and the conducting channel are both connected to the adjacent pressure relief channels, and the sealing plate is used to block all the pressure relief channels on the adjacent rotating disks. A control component for controlling the movement of the connecting pipe is provided in the support seat.

[0009] Furthermore, the control component includes a first electromagnet, the first electromagnet is fixed in the support seat, the connecting pipe is fixed with a first magnetic component, and the first electromagnet and the first magnetic component are magnetically attracted to each other.

[0010] Furthermore, the top plate is detachably connected to symmetrically distributed support bars.

[0011] Furthermore, it also includes an auxiliary fixing component, which is arranged on the rotating disk, and the auxiliary fixing component includes auxiliary fixing rods distributed at circumferential intervals, and the auxiliary fixing rods are slidably connected to the adjacent rotating disks. The auxiliary fixing rods are fixed with a rubber head and a second magnetic part, and the rubber head is used to squeeze the motor shaft. The support seat is fixed with a second hydraulic push rod, and the telescopic end of the second hydraulic push rod is fixed with a second electromagnet, and the second magnetic part and the second electromagnet are magnetically attracted to each other.

[0012] Furthermore, all the auxiliary fixing rods and all the top plates on the same rotating disk are distributed in a staggered manner.

[0013] Furthermore, the second electric slide rail is slidingly connected to a symmetrically distributed third electric slider, and the third electric slider on the second electric slide rail is fixedly connected to a support frame, and the support frame is provided with vertical support members and horizontal support members. The support frames distributed at intervals are jointly used to support the motor shaft and apply a supporting force to the motor shaft in the opposite direction of the grinding wheel.

[0014] The beneficial effects of the present invention are as follows: the present invention adjusts the angles of different top plates on the rotating disk. When the top plates are worn or the positioning holes have non-negligible errors, the center points of the circumferentially evenly distributed top plates are offset by adjusting the angles of the top plates, and the positions of the adjacent positioning holes clamped and positioned by the top plates are adjusted. The center axis of the motor shaft is swung to a position that coincides with the axes of the rotating disks on both sides, thereby reducing the process difficulty during fine grinding of the motor shaft and improving processing efficiency. When the offset is caused by the error of the positioning hole, the motor shaft is first straightened and fine ground, and then the precise diameter after fine grinding is used as the basis for correcting the error of the motor shaft positioning hole. This makes the work of correcting the motor shaft positioning hole more accurate and reduces the probability of the motor shaft being scrapped due to error.

[0015] The present invention sets the communication relationship between the injection piece and the adjacent communicating cavity, and there is no need to use a complex control program to determine which first hydraulic push rod needs to work. It only needs to move the point where the motor shaft pressure jump is maximum to the position where the injection piece is located, and directly inject hydraulic oil into the injection piece to adjust the deflection direction of the axis of the motor shaft. The operation process is simple and effective, and is easy for staff to understand and operate.

[0016] The present invention enhances the effect of fixing the motor shaft by the top plate through the rubber head on the auxiliary fixing rod, reduces the probability of the motor shaft slipping relative to the top plate, and thus increases the accuracy and reliability during the fine grinding process. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 Schematic diagram of the three-dimensional structure of the grinding wheel and the grinding fluid nozzle of the present invention;

[0019] Figure 3 Schematic diagram of the three-dimensional structure of the second electric slide rail and the support base of the present invention;

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

[0021] Figure 5 is a cross-sectional view of the top plate of the present invention;

[0022] Figure 6 An exploded view of the top plate and the slider of the present invention;

[0023] Figure 7 is a cross-sectional view of the fixed disk and the rotating disk of the present invention;

[0024] Figure 8 An exploded view of the injection member and the rotating disk of the present invention;

[0025] Figure 9 Schematic diagram of the three-dimensional structure of the connecting pipe and the blocking plate of the present invention;

[0026] Figure 10 It is a cross-sectional view of the connecting pipe and the blocking plate of the present invention;

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

[0028] Figure numbers: 1. operating table, 11. first electric slide rail, 12. second electric slide rail, 13. grinding wheel, 14. grinding fluid nozzle, 15. support frame, 2. support seat, 21. fixed disk, 22. rotating disk, 23. support rod, 3. top plate, 31. slider, 32. first hydraulic push rod, 33. support bar, 4. connecting chamber, 41. conducting channel, 42. one-way valve, 43. blocking part, 44. pressure relief channel, 5. injection part, 51. conducting hole, 52. conducting pipe, 6. electric motor, 7. connecting pipe, 71. sealing plate, 72. first electromagnet, 73. first magnetic member, 8. auxiliary fixing rod, 81. rubber head, 82. second magnetic member, 83. second electromagnet, 84. second hydraulic push rod. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] Example 1:

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

[0032] Reference Figure 1-Figure 3 The fine grinding device includes an operating table 1, on which a first electric slide rail 11 and a second electric slide rail 12 are fixedly connected perpendicular to each other (refer to Figure 2 and Figure 3 ), a grinding wheel 13 is installed on the first electric slide 11 through a first electric slider (the grinding wheel 13 is provided with an adjustment module for detecting the pressure between it and the motor shaft, and the adjustment module adopts an existing device and is not shown in the figure), a grinding fluid nozzle 14 is installed on the grinding wheel 13, and the second electric slide 12 is provided with two second electric sliders that are symmetrical on the left and right. The two second electric sliders on the second electric slide 12 are fixedly connected to a support seat 2. During the fine grinding process, the two support seats 2 synchronously drive the motor shaft to move left and right, and the first electric slider on the first electric slide 11 drives the grinding wheel 13 and the grinding fluid nozzle 14 to move along the radial direction of the motor shaft to fine grind the motor shaft.

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

[0034] Support 2:

[0035] Reference Figure 4-Figure 7 and Figure 9 , the two support bases 2 are fixed with a fixed disk 21 and a motor 6 (the motor 6 is an existing device, and the model and structure of the existing device are not described in detail), the two fixed disks 21 are located between the two support bases 2, and the opposite sides of the two fixed disks 21 are rotatably connected with a rotating disk 22, and the output shaft of the motor 6 and the rotating disk 22 are driven by a gear (refer to Figure 9 ), the opposite sides of the two rotating disks 22 are fixed with support rods 23, the two support rods 23 and the two rotating disks 22 are on the same axis, and the end of the support rod 23 away from the adjacent rotating disk 22 is hinged with three top plates 3 evenly distributed in the circumference. The top plates 3 on the same rotating disk 22 are a group, and the top plates 3 are slidably connected with a slider 31 (refer to Figure 5 and Figure 6), the slider 31 is located on the side of the adjacent top plate 3 close to the adjacent rotating disk 22, and the top plate 3 is detachably connected to two symmetrically distributed support bars 33 (refer to Figure 6 ), the rotating disk 22 is fixed with three first hydraulic push rods 32 evenly distributed in the circumference and corresponding 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 ), a liquid supply mechanism is provided on the support seat 2 for supplying liquid to the first hydraulic push rod 32 on the adjacent rotating disk 22.

[0036] The above-mentioned setting can achieve: all top plates 3 in the same group are used to locate the position of the positioning hole of the grinding motor shaft; the second electric slide 12 drives the two support seats 2 to move in opposite directions through the two second electric sliders 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. The second electric slide 12 can also drive the two support seats 2 to move in the same direction through the two second electric sliders thereon, thereby driving the clamped motor shaft to move together; the grinding fluid nozzle 14 is used to spray grinding fluid onto the grinding 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 toward the side of the adjacent rotating disk 22, so that the slider 31 drives the adjacent top plate 3 to swing in the direction close to the adjacent support rod 23, thereby adjusting the position of the axis center of the group of top plates 3 relative to the motor shaft positioning hole, and aligning the axial position of the motor shaft; the support bar 33 is used to support the motor shaft positioning hole. Because the support bar 33 adopts a detachable design, it can be quickly replaced after the support bar 33 is worn.

[0037] Liquid supply mechanism:

[0038] Reference Figure 7-10 The liquid supply mechanism includes a one-way valve 42, an injection piece 5 and a liquid extraction component.

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

[0040] Reference Figure 7-10 The injection piece 5 is fixed to the lower side of the fixed disk 21, and the rotating disk 22 is provided with three connecting cavities 4 and three conducting channels 41 (reference Figure 7 and Figure 8 ), the communicating chamber 4 is communicated with the adjacent conducting channel 41, the conducting channel 41 is communicated with the side of the adjacent first hydraulic push rod 32 away from the adjacent rotating disk 22, a one-way valve 42 is provided in the conducting channel 41 (the one-way valve 42 is an existing device), and the injection member 5 is provided with conducting holes 51 distributed at intervals (refer to Figure 8 and Figure 10), a conducting pipe 52 is fixedly connected to and communicated with the conducting hole 51 on the injection member 5, the conducting pipe 52 is fixedly connected to the adjacent support seat 2 and the adjacent fixed disk 21, and the conducting pipe 52 is communicated with an external hydraulic system (the hydraulic system adopts an existing device), and the conducting hole 51 is communicated with the connecting cavity 4 located on the lower side of the rotating disk 22.

[0041] Reference Figures 8-10 , the connecting cavity 4 is an arc-shaped cavity (refer to Figure 8 ), there is a blocking portion 43 between two adjacent communicating cavities 4, the injection member 5 is an arc-shaped plate, all the conducting holes 51 on the injection member 5 are distributed along the arc, the injection member 5 will not be connected to the three communicating cavities 4 at the same time (that is, all the conducting holes 51 thereon will not be connected to the three communicating cavities 4 at the same time), and the diameter of the conducting hole 51 is smaller than the minimum distance between two adjacent communicating cavities 4 (refer to Figure 8 , i.e. the width at the blocking portion 43).

[0042] The above-mentioned arrangement can achieve: the injection piece 5 injects liquid into the connecting chamber 4 located at the lower side of the rotating disk 22, so that the first hydraulic push rod 32 located at the lower side of the rotating disk 22 contracts, thereby increasing the convenience of adjusting the top plate 3 of the same group, that is, controlling the top plate 3 located at the lower side to swing upward, driving the axis of the motor shaft to swing upward, and reducing the complexity of adjusting the top plate 3 of the same group; the hydraulic oil in the conducting flow channel 41 can only pass through the one-way valve 42 from the direction close to the adjacent connecting chamber 4 and flow to the side away from the connecting chamber 4, and cannot flow in the reverse direction through the one-way valve 42; by limiting the relationship between the curvature of the injection piece 5 and the curvature of the connecting chamber 4, it is ensured that the injection piece 5 will not be connected with the three connecting chambers 4 at the same time; a conducting hole 51 will not be connected with two connecting chambers 4 at the same time. When the injection piece 5 is connected with two connecting chambers 4 at the same time, different amounts of hydraulic oil are injected into the two connecting chambers 4 according to the ratio of the connecting area between the two connecting chambers 4 and the injection piece 5.

[0043] Reference Figure 7-10 The liquid pumping assembly includes a connecting pipe 7, a sealing plate 71 and a control assembly.

[0044] Connecting pipe 7 and blocking plate 71:

[0045] Reference Figure 7-10 The connecting pipe 7 is slidably connected to the support seat 2, the connecting pipe 7 is rotatably connected to the blocking plate 71, the blocking plate 71 is sealed and slidably connected to the rotating disk 22, and the rotating disk 22 is provided with a circumferentially uniformly distributed pressure relief channel 44 corresponding to the conducting channel 41 (refer to Figure 8 and Figure 9 ), the pressure relief channel 44 is connected to the adjacent conducting channel 41, and the connection between the pressure relief channel 44 and the conducting channel 41 is located on the side of the one-way valve 42 away from the adjacent communicating cavity 4 (refer to Figure 9 ), when the blocking plate 71 does not block the adjacent pressure relief channels 44, the connecting pipe 7 is connected to all the pressure relief channels 44.

[0046] Control components:

[0047] Reference Figure 9 and Figure 10 The control component includes a first electromagnet 72 and a first magnetic member 73. The first magnetic member 73 is a permanent magnet. The first electromagnet 72 is fixed to the support base 2, and the first magnetic member 73 is fixed to the outside of the connecting pipe 7. The first magnetic member 73 follows the connecting pipe 7 to slide left and right relative to the adjacent support base 2. The first electromagnet 72 and the first magnetic member 73 are magnetically attracted to each other.

[0048] The above-mentioned setting can achieve: the blocking plate 71 is used to block all the pressure relief channels 44 on the adjacent rotating disk 22, the pressure relief channels 44 are used to discharge the hydraulic oil in the first hydraulic push rod 32, and the blocking plate 71 is used to control the timing of the pressure relief channel 44 to discharge the hydraulic oil in the first hydraulic push rod 32. At the same time, the hydraulic system can inject hydraulic oil into the connecting pipe 7 to make the telescopic ends of the first hydraulic push rods 32 in the same group shrink at the same time, adjust the overall taper of the top plate 3 in the same group, and make the top plate 3 in the same group adapt to positioning holes of more types and diameters.

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

[0050] Fine grinding preparation stage:

[0051] First, start the two first electromagnets 72, and the first electromagnets 72 release repulsive force to the adjacent first magnetic parts 73, so that the first magnetic parts 73 drive the connecting pipe 7 and the blocking plate 71 to move, and 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 at the same time, the two second electric sliders on the second electric slide rails 12 are controlled to drive the two support seats 2 and the upper top plates 3 to move toward each other, until the two groups of top plates 3 are respectively inserted into the positioning holes on both sides of the motor shaft, and the positioning holes are squeezed by the support bars 33 to clamp the motor shaft. Then, the two second electric slide rails 12 are closed, and the two motors 6 are started. The two motors 6 respectively drive the adjacent rotating disks 22 to rotate in the same direction, and the two rotating disks 22 respectively drive the motor shafts to rotate together through the adjacent groups of top plates 3.

[0052] During the rotation of the motor shaft, use a micrometer to detect the pressure fluctuation value at both ends of the motor shaft to determine the uniformity of the distribution of the motor shaft material allowance. If the pressure fluctuation value on one side of the motor shaft is large at this time, for example, the pressure fluctuation value on the left motor shaft is large and the pressure fluctuation value on the right motor shaft is small, there may be slight wear on the left top plate 3, deviation of the positioning hole on the left side of the motor shaft, etc., causing the center axis of the motor shaft to be slightly deflected. At this time, control the motor shaft to rotate to the bottom where the pressure fluctuation is the largest, and turn off the two motors 6.

[0053] After the motor shaft pressure jump is the largest to the lowest point, the two motors 6 are turned off to stop the motor shaft from rotating. At this time, the right top plate 3 remains in place. Taking the left top plate 3 and adjacent components as an example: the hydraulic system is controlled to inject hydraulic oil into all the conducting pipes 52. At this time, if all the conducting pipes 52 are connected to a connecting cavity 4, all the hydraulic oil is injected into the connecting cavity 4. The hydraulic oil is guided by the connecting cavity 4 and the conducting flow channel 41 to flow into the first hydraulic push rod 32. The telescopic end of the first hydraulic push rod 32 retracts inward, driving the slider 31 to move to the 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 by a certain angle (the value by which the top plate 3 needs to swing is positively correlated with the value of the jump detection, that is, the greater the jump amplitude in the jump detection, the greater the angle by which the top plate 3 needs to swing), the hydraulic system stops injecting hydraulic oil into all the conducting pipes 52. At this time, the motor shaft is supported by the top plate 3 on the upper side that is not swinging and does not move.

[0054] If all the conducting tubes 52 are connected to the two communicating chambers 4, then all the conducting tubes 52 inject hydraulic oil into the surfaces of the two communicating chambers 4 respectively. The communicating chamber 4 connected to more conducting tubes 52 among the two communicating chambers 4 has more hydraulic oil injected into it, and the corresponding top plate 3 swings with a larger amplitude, while the other communicating chamber 4 has less hydraulic oil injected into it, and 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 and down directions, while reducing the amplitude of the axis of the motor shaft swinging back and forth.

[0055] When the hydraulic system stops injecting hydraulic oil into all the conducting tubes 52, the two second electric slide blocks on the second electric slide rail 12 are controlled to drive the two support seats 2 and the upper top plates 3 to move toward each other again, and the two groups of top plates 3 clamp the positioning holes again. At this time, the top plates 3 of the right group and the motor shaft positioning holes remain in place, while the left motor shaft positioning holes are offset upward under the squeezing of the left group top plates 3, so that the axis of the motor shaft is offset to a more horizontal state.

[0056] After re-clamping the motor shaft, it is necessary to restart the two motors 6 and perform pressure jump detection on both ends of the motor shaft. When the pressure jump detection at both 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 introduced into the grinding fluid nozzle 14 so that the grinding fluid nozzle 14 sprays the grinding fluid onto the grinding portion of the motor shaft. Then, the two second electric sliders and the two support seats 2 on the second electric slide rail 12 drive the motor shaft to move intermittently from left to right. The first electric slider on the first electric slide rail 11 drives the grinding wheel 13 to move forward and backward, and controls the pressure between the grinding wheel 13 and the motor shaft to perform fine grinding on the motor shaft from left to right.

[0059] Ending stage:

[0060] After fine grinding is completed, stop feeding grinding fluid into the grinding fluid nozzle 14, and control the first electric slider on the first electric slide rail 11 to drive the grinding wheel 13 away from the motor shaft. Then, perform pressure jump detection at various locations on the motor shaft again to ensure that the product accuracy is within the specified range.

[0061] Finally, the two second electric sliders on the second electric slide rail 12 drive the two support seats 2 to move and reset, and control the two first electromagnets 72 to change the magnetism. The first electromagnet 72 attracts the adjacent first magnetic parts 73, so that the first magnetic parts 73 drive the connecting pipe 7 and the sealing plate 71 to move together, and the sealing plate 71 releases the blockage of the adjacent pressure relief channel 44. At this time, the hydraulic system extracts the hydraulic oil in all the first hydraulic push rods 32 through the connecting pipe 7, the pressure relief channel 44 and the conducting channel 41, thereby resetting the telescopic end of the first hydraulic push rod 32, the slider 31 and the top plate 3, and completing the whole process of fine grinding of the motor shaft.

[0062] When it is determined that there is a large error in the motor shaft locating hole, which causes a large pressure fluctuation value on one side of the motor shaft, the present device can also ensure the required accuracy during the fine grinding of the motor shaft according to the above-mentioned work flow. After the fine grinding is completed, in order not to affect the subsequent processing process, the locating hole still needs to be calibrated and corrected. Because the diameter of the motor shaft has been fine-ground to a precise size, it is easier to narrow the error range of the locating hole when the position of the locating hole is corrected based on the diameter of the motor shaft.

[0063] Example 2:

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

[0065] According to a motor shaft fine grinding device for robot motor production according to this embodiment, the rotating disk 22 of Example 1 is also provided with an auxiliary fixing structure. The specific component structure and movement principle in Example 1 are not repeated in this embodiment, and the auxiliary fixing component is emphasized.

[0066] Reference Figure 4 、 Figure 5 、 Figure 7 and Figure 9 The auxiliary fixing assembly includes auxiliary fixing rods 8 distributed at intervals in the circumferential direction. The auxiliary fixing rods 8 are slidably connected to the adjacent rotating disks 22. The two ends of the auxiliary fixing rods 8 are respectively fixed with rubber heads 81 and second magnetic members 82 (refer to Figure 7), the second magnetic member 82 is located on the side of the auxiliary fixing rod 8 close to the adjacent fixed disk 21, and all the auxiliary fixing rods 8 and all the top plates 3 on the same rotating disk 22 are staggered (refer to Figure 4 and Figure 5 ), the rubber head 81 is made of elastic material (such as rubber), the support base 2 is fixed with a second hydraulic push rod 84, the second hydraulic push rod 84 is connected to the existing hydraulic system, the telescopic end of the second hydraulic push rod 84 is fixed with a second electromagnet 83, the second electromagnet 83 is a ring magnet (refer to 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 member 82 and the second electromagnet 83 are magnetically attracted to each other.

[0067] The above setting can achieve: the second electromagnet 83 pushes the second magnetic attraction part 82 to move through the magnetic repulsion force, so that the auxiliary fixing rods 8 and the rubber head 81 on the left and right sides squeeze and clamp the motor shaft. While pushing the auxiliary fixing rod 8 that rotates with the rotating disk 22 to move, there is no friction between the second electromagnet 83 and the second magnetic attraction part 82, so there is no wear. The auxiliary fixing rod 8 and the rubber head 81 squeeze the motor shaft to assist the adjacent groups of top plates 3 to clamp the motor shaft together, and increase the force of the rotating disk 22 to drive the motor shaft to rotate through the rubber head 81, 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, and the two third electric sliders are located between the two second electric sliders. The third electric slider on the second electric slide rail 12 is fixedly connected to a support frame 15, and the support frame 15 is provided with vertical support members and horizontal support members. The vertical support members and the horizontal support members are both existing devices, among which the vertical support member is a combination of an electric push rod and a support plate, and the horizontal support member is a combination of an electric push rod and a rolling ball.

[0069] The above arrangement can achieve: the vertical support members on the two support frames 15 are used to jointly support the motor shaft; during the above-mentioned adjustment of the position 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; during the period when the motor shaft is re-clamped after the top plate 3 is adjusted, the electric push rod on the vertical support member is controlled to move and reset; when the motor shaft is fine-ground, the electric push rod on the horizontal support member drives the ball to contact the motor shaft, applying a supporting force in the opposite direction to that applied by the grinding wheel 13 to the motor shaft, reducing the probability of the motor shaft being deflected by the force; at the end of the fine-ground grinding, the electric push rod on the horizontal support member is controlled to move and reset.

[0070] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A motor shaft fine grinding device for robot motor production, characterized in that: The invention comprises an operating table (1), wherein a first electric slide rail (11) and a second electric slide rail (12) are fixedly connected to the operating table (1), a grinding wheel (13) is installed on the first electric slide rail (11) via a first electric slider, the second electric slide rail (12) is provided with a symmetrically distributed second electric slider, and the second electric slider on the second electric slide rail (12) is fixedly connected to a support seat (2), wherein the symmetrically distributed support seats (2) are all fixedly connected to a fixed disk (21) and a motor (6), the fixed disk (21) is rotatably connected to a rotating disk (22), and the output shaft of the motor (6) The rotating disk (22) is connected to the supporting rod (23) through gear transmission. The supporting rod (23) is hinged to a top plate (3) evenly distributed in the circumference. The top plate (3) is slidably connected to a slider (31). The rotating disk (22) is fixed to a first hydraulic push rod (32) evenly distributed in the circumference and corresponding to the top plate (3). The telescopic end of the first hydraulic push rod (32) is hinged to the corresponding slider (31). The support seat (2) is provided with a liquid supply mechanism for supplying liquid to the first hydraulic push rod (32) on the adjacent rotating disk (22).

2. The motor shaft fine grinding device for robot motor production according to claim 1, characterized in that: The liquid supply mechanism includes an injection member (5), the injection member (5) is fixed to the lower side of the fixed disk (21), the rotating disk (22) is provided with a circumferentially uniformly distributed connecting cavity (4) and a circumferentially uniformly distributed conducting flow channel (41), the connecting cavity (4) and the conducting flow channel (41) are in one-to-one correspondence with the top plate (3), the connecting cavity (4) is communicated with the adjacent conducting flow channel (41), and the conducting flow channel (41) is connected to the adjacent first hydraulic push rod (32) is connected, a one-way valve (42) is provided in the conducting flow channel (41), the injection member (5) is provided with conducting holes (51) distributed at intervals, a conducting pipe (52) is fixedly connected and connected in the conducting hole (51) on the injection member (5), the conducting hole (51) is connected with the adjacent communicating cavity (4), and the support seat (2) is provided with a pumping assembly for simultaneously extracting the hydraulic oil in all the first hydraulic push rods (32) on the adjacent rotating disk (22).

3. The motor shaft fine grinding device for robot motor production according to claim 2, characterized in that: The connecting cavity (4) is an arc-shaped cavity, the injection piece (5) is an arc-shaped plate, all the conducting holes (51) on the injection piece (5) are distributed along an arc line, the curvature of the connecting cavity (4) is not greater than the curvature of the injection piece (5), and the injection piece (5) will not be connected to the three connecting cavities (4) at the same time.

4. The motor shaft fine grinding device for robot motor production according to claim 3, characterized in that: The diameter of the conducting hole (51) is smaller than the minimum distance between two adjacent communicating cavities (4).

5. The motor shaft fine grinding device for robot motor production according to claim 2, characterized in that: The liquid extraction component includes a connecting pipe (7), the connecting pipe (7) is slidably connected to the support seat (2), the connecting pipe (7) is rotatably connected to a blocking plate (71), the blocking plate (71) is sealingly and slidably connected to the rotating disk (22), the rotating disk (22) is provided with circumferentially uniformly distributed pressure relief channels (44), the pressure relief channels (44) correspond one-to-one with the top plate (3), the connecting pipe (7) and the conducting channel (41) are both connected to adjacent pressure relief channels (44), the blocking plate (71) is used to block all the pressure relief channels (44) on the adjacent rotating disk (22), and a control component for controlling the movement of the connecting pipe (7) is provided in the support seat (2).

6. The motor shaft fine grinding device for robot motor production according to claim 5, characterized in that: The control component includes a first electromagnet (72), the first electromagnet (72) is fixedly connected to the support seat (2), the connecting pipe (7) is fixedly connected to a first magnetic attraction component (73), and the first electromagnet (72) and the first magnetic attraction component (73) are magnetically attracted to each other.

7. The motor shaft fine grinding device for robot motor production according to claim 1, characterized in that: The top plate (3) is detachably connected to symmetrically distributed support bars (33).

8. The motor shaft fine grinding device for robot motor production according to claim 5, characterized in that: The invention also includes an auxiliary fixing assembly, which is arranged on the rotating disk (22). The auxiliary fixing assembly includes auxiliary fixing rods (8) distributed at circumferential intervals. The auxiliary fixing rods (8) are slidably connected to the adjacent rotating disks (22). The auxiliary fixing rods (8) are fixed with a rubber head (81) and a second magnetic member (82). The rubber head (81) is used to squeeze the motor shaft. The support seat (2) is fixed with a second hydraulic push rod (84). The telescopic end of the second hydraulic push rod (84) is fixed with a second electromagnet (83). The second magnetic member (82) and the second electromagnet (83) are magnetically attracted to each other.

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

10. The motor shaft fine grinding device for robot motor production according to claim 1, characterized in that: The second electric slide rail (12) is slidably connected to a third electric slider symmetrically distributed. The third electric slider on the second electric slide rail (12) is fixedly connected to a support frame (15). The support frame (15) is provided with vertical support members and horizontal support members. The support frames (15) distributed at intervals are used to support the motor shaft and apply a supporting force to the motor shaft in the opposite direction to the grinding wheel (13).

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