Straight gear tooth surface grinding device and grinding method

Abstract

The invention relates to a spur gear tooth surface grinding device. The spur gear tooth surface grinding device comprises a working table, a rotating disc and a moving frame are arranged on the working table, the moving frame is connected with a first driving mechanism for driving the moving frame to linearly move, a lifting frame is arranged on the moving frame, the lifting frame is connected with a lifting mechanism, a grinding wheel is arranged on the lifting frame, and the grinding wheel is connected with a grinding motor. The rotating disc is connected with a rotating driving mechanism for driving the rotating disc to rotate, and a first grinding face and a second grinding face are arranged on the two side walls of the grinding wheel correspondingly and can make contact with the tooth faces of the two side walls of the same tooth groove of the ground gear at the same time. A positioning column is arranged on the upper surface of the rotary disc, the positioning column and the rotary disc are coaxial, and a gear tensioning positioning mechanism is arranged on the positioning column. And a gear angle locking mechanism is arranged on the working table. The grinding wheel has the automatic positioning function, it can be guaranteed that a tooth groove accurately rotates till being ground, and therefore the grinding precision is guaranteed.

Description

Technical Field

[0001] The invention belongs to the field of gear processing equipment, in particular to a spur gear tooth surface grinding device and a grinding method. Background Art

[0002] After high-precision tooth shape processing to size, it needs to be finished by grinding. In particular, the tooth surface, as the meshing surface of the gear, has higher requirements for precision and needs fine grinding to reduce surface roughness and slow down tooth surface wear.

[0003] There are many kinds of existing gear grinding equipment. For example, CN202211293658.7 discloses a CNC gear grinding machine for high-precision gear processing. During grinding, multiple tooth shapes are ground in sequence. Specifically, after the gear is fixed on the turntable, the movable seat is driven to move by the first cylinder, so that the movable seat drives the tooth plate to move toward the gear. Then, the support plate can be pushed to move by the second cylinder, so that the support plate drives the tooth plate to move, and the tooth pattern on the tooth plate and the tooth pattern of the gear are meshed with each other. Under the locking of the tooth pattern, the gear on the turntable can be further limited and reinforced, thereby effectively preventing the turntable from driving the gear to rotate and ensuring the stability during processing. At the same time, the tooth plate is driven to move by the support plate 28, so that the tooth plate can pull the gear and the turntable to rotate, and then the angle of the gear can be adjusted to grind each tooth groove.

[0004] The existing technology has the following problems: 1. When a conventional grinding wheel is used for grinding, since the tooth surface is not a plane, it is difficult for the grinding wheel to fully contact the tooth surface and it is difficult to fully grind the entire tooth surface; 2. The linear movement of the tooth plate is used to drive the ground gear to rotate, so that each tooth groove of the ground gear moves to the grinding wheel. Since there is an error in the linear movement distance of the tooth plate each time, and there is also a matching error when the tooth plate and the ground gear are meshed, it is difficult for the tooth groove positions of the ground gear to be completely consistent after they move to the grinding position, and there is a certain error, so it is difficult to ensure the grinding accuracy. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a spur gear tooth surface grinding device and grinding method to ensure that each tooth groove moves accurately to the grinding position and improve the grinding accuracy.

[0006] In order to solve the above problems, the technical solution adopted by the present invention is as follows: a spur gear tooth surface grinding device comprises a work table, a turntable and a moving frame are arranged on the work table, the moving frame is connected to a first driving mechanism driving the moving frame to move linearly, a lifting frame is arranged on the moving frame, the lifting frame is connected to a lifting mechanism, a grinding wheel is arranged on the lifting frame, and the grinding wheel is connected to a grinding motor; the turntable is connected to a rotating driving mechanism driving the turntable to rotate,

[0007] The two side walls of the grinding wheel are respectively provided with a first grinding surface and a second grinding surface, and the first grinding surface and the second grinding surface can simultaneously contact the tooth surfaces of the two side walls of the same tooth groove of the gear being ground;

[0008] A positioning column is arranged on the upper surface of the turntable, the positioning column is coaxial with the turntable, and a gear tensioning positioning mechanism is arranged on the positioning column;

[0009] A gear angle locking mechanism is arranged on the work surface.

[0010] Furthermore, the grinding wheel is installed on the rotating shaft, and both ends of the rotating shaft are installed on the bearing seats through bearings. The lifting frame is provided with a mounting hole, the bearing seat is located in the mounting hole and cooperates with the gap of the mounting hole, and a pressure sensor is provided between the side wall of the bearing seat away from the turntable and the inner wall of the mounting hole; the grinding motor is connected to the rotating shaft.

[0011] Furthermore, the upper part of the positioning column is provided with a central threaded hole, and the lower part is provided with a central light hole, the diameter of the central light hole is larger than the diameter of the central threaded hole, the gear tensioning and positioning mechanism includes a stud, a pressure cylinder and a rotating handle, the stud is threadedly matched with the central threaded hole, the lower end of the stud extends into the central light hole, and the lower end of the stud is fixedly provided with an upper driving sleeve and a lower driving sleeve, the lower driving sleeve is connected with a transmission sleeve, and the inner hole of the transmission sleeve is truncated cone-shaped; the lower end of the positioning column is provided with 3 positioning grooves, the 3 positioning grooves are evenly distributed around the center line of the positioning column, and a tensioning block is provided in each of the positioning grooves, and the inner wall of the tensioning block is provided with an upper protrusion and a lower protrusion, the upper protrusion is provided with a first inclined surface, and the first inclined surface can fit the outer wall of the upper driving sleeve, the lower protrusion includes a radial section and an axial section distributed in an L shape, and the axial A second inclined surface is provided on the side wall of the segment facing the tensioning block, and the transmission sleeve can enter the gap between the axial segment and the tensioning block, and the second inclined surface fits the inner hole wall of the transmission sleeve; a transmission pin is provided on the lower surface of the rotating handle, and a limiting column perpendicular to the transmission pin is provided at the lower end of the transmission pin, a blind hole is provided at the upper end of the stud, and two fan-shaped limiting grooves that are centrally symmetrical with respect to the center of the blind hole are provided at the bottom of the blind hole, and a connecting groove extending from the upper end surface of the stud to the fan-shaped limiting groove is provided on the side wall of the blind hole, and the transmission pin is gap-matched with the blind hole, and the two ends of the limiting column are located in the fan-shaped limiting groove and gap-matched with the fan-shaped limiting groove; the pressure cylinder is sleeved on the outside of the positioning column and slidably matched with the positioning column, and a support plate is provided on the upper port of the pressure cylinder, and the support plate is sleeved outside the stud and gap-matched with the stud, and an elastic pad is provided on the upper surface of the support plate.

[0012] Furthermore, the gear angle locking mechanism includes two wedge-shaped blocks, and the wedge-shaped blocks are connected to a second driving mechanism that drives the wedge-shaped blocks to reciprocate radially along the turntable. The two wedge-shaped blocks and the grinding wheel are evenly distributed around the turntable.

[0013] Furthermore, the rotation driving mechanism is a servo motor.

[0014] Furthermore, a heat sink is provided on the lifting frame, the bottom plate of the heat sink protrudes upward to form a U-shaped heat conduction cavity, the upper part of the grinding wheel is located in the heat conduction cavity, the inner wall of the heat sink is covered with a liquid absorbent core layer, a working medium is provided in the heat sink, the top plate of the heat sink is an upwardly protruding arc plate, and a fan is provided on the top outer side of the heat sink.

[0015] Furthermore, a cam is provided on the rotating shaft, a push rod cooperating with the cam is provided above the cam, the push rod is vertically arranged, and a connecting plate is fixedly connected to the upper end of the push rod, one end of the connecting plate is fixedly connected to the outer wall of the heat dissipation box, and a spring is provided between the upper surface of the connecting plate and the lifting frame.

[0016] The grinding method of the spur gear tooth surface grinding device comprises:

[0017] S1. The gear to be ground is sleeved outside the positioning column, the gear to be ground is supported by a turntable, and the inner hole of the gear to be ground is tightened by a gear tightening and positioning mechanism;

[0018] S2, the first driving mechanism pushes the movable frame to move toward the gear to be ground until the grinding wheel enters the tooth groove of the gear to be ground, and the first grinding surface and the second grinding surface respectively contact the tooth surfaces of the two side walls of the same tooth groove of the gear to be ground;

[0019] S3, using the gear angle locking mechanism to lock the ground gear to prevent the ground gear from rotating;

[0020] S4, using a grinding motor to drive the grinding wheel to rotate, and using a lifting mechanism to drive the lifting frame to move up and down, so that the first grinding surface and the second grinding surface are used to grind the entire tooth surface;

[0021] S5, after a tooth groove is ground, the gear angle locking mechanism releases the lock of the grinding gear, the first driving mechanism pushes the moving frame to move away from the gear to be ground, and the grinding wheel exits the tooth groove;

[0022] S6, using the first driving mechanism to drive the turntable to rotate 360° / number of tooth grooves;

[0023] S7. Repeat steps S2 to S6 until all tooth grooves are ground.

[0024] Furthermore, the grinding wheel is mounted on the rotating shaft, and both ends of the rotating shaft are mounted on the bearing seat through bearings. The lifting frame is provided with a mounting hole, and the bearing seat is located in the mounting hole and is matched with the mounting hole gap. A pressure sensor is provided between the side wall of the bearing seat away from the turntable and the inner wall of the mounting hole; the grinding motor is connected to the rotating shaft;

[0025] In step S2, the pressure sensor is used to detect the pressure between the first grinding surface, the second grinding surface and the tooth surface. When the pressure reaches a set value, the first driving mechanism stops moving.

[0026] The beneficial effect of the present invention is that the shape of the grinding wheel of the present invention is adapted to the shape of the tooth groove of the gear to be ground, and the first grinding surface and the second grinding surface on both sides can simultaneously contact the tooth surfaces of the two side walls of the same tooth groove of the gear to be ground. Since the width of the tooth groove decreases from the tooth top to the tooth bottom, the thickness of the grinding wheel decreases from the center to the edge. In the process of transporting the grinding wheel to the tooth groove, the grinding wheel can play a role of correction and positioning. Specifically, assuming that the tooth groove does not reach the grinding position accurately, that is, the tooth groove deviates from the grinding position by a certain angle, then when the grinding wheel enters the tooth groove, one grinding surface of the grinding wheel (assuming it is the first grinding surface) will first contact the tooth surface, and the other grinding surface (assuming it is the second grinding surface) does not contact the tooth surface. As the grinding wheel continues to enter the tooth groove, the first grinding surface can push the gear to rotate until the second grinding surface also contacts the tooth surface. At this time, the first grinding surface and the second grinding surface both contact the tooth surface, and the tooth groove is in an accurate grinding position. Then, the gear angle locking mechanism is used to prevent the gear from rotating, and grinding can be performed.

[0027] It can be seen that the grinding wheel of the present invention has the function of automatic positioning, which can ensure that the tooth groove is accurately rotated until grinding, thereby ensuring the grinding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a front view schematic diagram of the present invention;

[0029] Figure 2 yes Figure 1 Middle AA section view;

[0030] Figure 3 It is a schematic diagram of the gear tensioning and positioning mechanism;

[0031] Figure 4 It is a schematic diagram of gear tensioning;

[0032] Figure 5 This is a schematic diagram of releasing the gear tension;

[0033] Figure 6 It is a schematic diagram of the top surface of the stud;

[0034] Figure 7 yes Figure 2 BB cutaway diagram;

[0035] Figure 8 It is a top view schematic diagram of the gear angle locking mechanism;

[0036] 1-1. The present invention relates to a plurality of rotating shafts, wherein the plurality of rotating shafts are provided with a plurality of movable brackets, wherein the plurality of movable brackets are provided with a plurality of movable brackets, wherein the plurality of movable brackets are provided with a plurality of movable brackets, and the plurality of movable brackets are provided with a plurality of movable brackets. DETAILED DESCRIPTION

[0037] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0038] The spur gear tooth surface grinding device of the present invention is as follows Figure 1 and Figure 2 As shown, it includes a work surface 1, which is made of a metal plate and has a group of supporting legs at the bottom so that the work surface 1 is at a suitable height.

[0039] A turntable 2 and a moving frame 3 are provided on the work surface 1. The moving frame 3 is connected to a first driving mechanism 4 for driving the moving frame 3 to move linearly. The first driving mechanism 4 may be a hydraulic cylinder, which is not only used to push the moving frame 3 to move linearly back and forth, but also to provide pressure during grinding. In order to ensure that the moving frame 3 moves smoothly, a vertical stand plate may be provided on the work surface 1. A plurality of horizontal guide rods are provided on the side wall of the stand plate. The guide rods penetrate the moving frame 3 and slide with the moving frame 3. The first driving mechanism 4 is also provided on the side wall of the stand plate.

[0040] The mobile frame 3 is provided with a lifting frame 8, which can be slidably matched with the mobile frame 3. The lifting frame 8 is connected with a lifting mechanism 9, which can be a hydraulic cylinder, a cylinder, a screw nut mechanism driven by a motor, etc. The lifting frame 8 is provided with a grinding wheel 6, which is connected with a grinding motor 7, and the grinding motor 7 can drive the grinding wheel 6 to rotate, so that the grinding wheel 6 completes the grinding of the tooth surface. The turntable 2 is connected with a rotation drive mechanism 5 that drives the turntable 2 to rotate, and the rotation drive mechanism 5 can be a servo motor or other equipment. Specifically, the turntable 2 can be installed on the support frame through a plane bearing, and the support frame is fixed on the worktable 1. The lower surface of the turntable 2 is provided with a transmission shaft, and the transmission shaft is connected to the rotation drive mechanism 5. The turntable 2 is used to support the gear to be ground. The outer diameter of the turntable 2 is smaller than the diameter of the gear tooth root circle. After the gear to be ground is placed flat on the turntable 2, the tooth shape of the gear to be ground exceeds the edge of the turntable 2.

[0041] The two side walls of the grinding wheel 6 are respectively provided with a first grinding surface 61 and a second grinding surface 62, which can simultaneously contact the tooth surfaces of the two side walls of the same tooth groove of the ground gear. The shape and size of the first grinding surface 61 and the second grinding surface 62 are consistent with the shape and size of the tooth surface of the ground gear, ensuring that the first grinding surface 61 and the second grinding surface 62 can fit the tooth surface during grinding, ensuring that the entire tooth surface is fully ground.

[0042] A positioning column 10 is provided on the upper surface of the turntable 2. The positioning column 10 is coaxial with the turntable 2, and a gear tensioning and positioning mechanism is provided on the positioning column 10. The outer diameter of the positioning column 10 is slightly smaller than the inner diameter of the ground gear, ensuring that the ground gear can be quickly sleeved outside the positioning column 10 and the ground gear can be placed flat on the turntable 2. The gear tensioning and positioning mechanism is used to tighten and position the inner hole of the ground gear to ensure that the ground gear, the positioning column 10 and the turntable 2 are coaxial.

[0043] A gear angle locking mechanism is provided on the work surface 1, and the gear angle locking mechanism is used to lock the gear being ground to ensure that the gear being ground can remain stable after the tooth groove of the gear being ground reaches the precise grinding position.

[0044] The grinding method of the spur gear tooth surface grinding device of the present invention comprises:

[0045] S1. The gear to be ground is sleeved outside the positioning column 10, the turntable 2 is used to support the gear to be ground, and the inner hole of the gear to be ground is tightened by the gear tightening and positioning mechanism. At this time, the gear to be ground is fixed to the turntable 2 and can rotate synchronously with the turntable 2.

[0046] S2. The first driving mechanism 4 pushes the movable frame 3 to move toward the gear to be ground until the grinding wheel 6 enters the tooth groove of the gear to be ground, and the first grinding surface 61 and the second grinding surface 62 respectively contact the tooth surfaces of the two side walls of the same tooth groove of the gear to be ground.

[0047] S3. Use the gear angle locking mechanism to lock the ground gear to prevent the ground gear from rotating.

[0048] S4. The grinding motor 7 is used to drive the grinding wheel 6 to rotate, and the lifting mechanism 9 is used to drive the lifting frame 8 to move up and down, so that the first grinding surface 61 and the second grinding surface 62 grind the entire tooth surface.

[0049] S5. After a tooth groove is ground, the gear angle locking mechanism releases the lock of the grinding gear, the first driving mechanism 4 pushes the moving frame 3 to move away from the gear to be ground, and the grinding wheel 6 exits the tooth groove.

[0050] S6. Use the first driving mechanism 4 to drive the turntable 2 to rotate 360° / number of tooth grooves.

[0051] S7. Repeat steps S2 to S6 until all tooth grooves are ground.

[0052] In the present invention, the size and shape of the grinding wheel 6 are adapted to the size and shape of the tooth groove, the width of the tooth groove decreases from the tooth top to the tooth root, and the thickness of the grinding wheel 6 decreases from the center to the edge. In step S2, the grinding wheel 6 has the function of automatically correcting and positioning the tooth groove position. Specifically, assuming that the tooth groove does not accurately reach the grinding position, that is, the tooth groove deviates from the grinding position by a certain angle, then when the grinding wheel 6 enters the tooth groove, one grinding surface of the grinding wheel 6 (assuming the first grinding surface 61) will first contact the tooth surface, and the other grinding surface (assuming the second grinding surface 62) does not contact the tooth surface. As the grinding wheel 6 continues to enter the tooth groove, the first grinding surface 61 can drive the gear to rotate until the second grinding surface 62 also contacts the tooth surface. At this time, the first grinding surface 61 and the second grinding surface 62 both contact the tooth surface, and the first grinding surface 61 and the second grinding surface 62 both fit the tooth surface, and the tooth groove is in an accurate grinding position. Then grinding is performed.

[0053] It can be seen that in the present invention, the grinding wheel 6 has an automatic positioning function, which can ensure that the tooth groove is accurately rotated until grinding, thereby ensuring the grinding accuracy.

[0054] During grinding, the first grinding surface 61 and the second grinding surface 62 must apply a certain pressure to the tooth surface to achieve effective grinding. In the prior art, the grinding pressure is usually controlled by controlling the movement distance of the grinding wheel 6. There is a certain error, and it is difficult to ensure that the grinding pressure of the grinding wheel 6 on each tooth surface remains consistent.

[0055] In order to ensure that the grinding pressure of the grinding wheel 6 on each tooth surface is consistent, Figure 2 , Figure 7 As shown, the grinding wheel 6 is mounted on the rotating shaft 11, and the two ends of the rotating shaft 11 are mounted on the bearing seat 13 through bearings 12. The lifting frame 8 is provided with a mounting hole, and the bearing seat 13 is located in the mounting hole and is in clearance with the mounting hole. A pressure sensor 14 is provided between the side wall of the bearing seat 13 away from the turntable 2 and the inner wall of the mounting hole; the grinding motor 7 is connected to the rotating shaft 11. In step S2, the pressure sensor 14 is used to detect the pressure between the first grinding surface 61 and the second grinding surface 62 and the tooth surface. When the pressure reaches the set value, the first driving mechanism 4 stops moving.

[0056] The grinding wheel 6 enters the tooth groove horizontally from the middle position of the tooth groove. When the first grinding surface 61 and the second grinding surface 62 contact the tooth surface, the first driving mechanism 4 continues to apply thrust to the moving frame 3. After the thrust is transmitted to the grinding wheel 6, it is converted into grinding pressure between the grinding wheel 6 and the tooth surface. The grinding pressure is transmitted to the rotating shaft 11, and then transmitted to the bearing seat 13 and the pressure sensor 14 through the bearing 12. According to the pressure value detected by the pressure sensor 14, the grinding pressure can be judged. The first driving mechanism 4 uses a hydraulic cylinder to gradually increase the thrust. When the pressure value detected by the pressure sensor 14 reaches the set value, the first driving mechanism 4 stops increasing the thrust and the thrust stabilizes. When grinding each tooth groove, the pressure value detected by the pressure sensor 14 remains the same, which can ensure that the grinding pressure on each tooth surface is basically the same. In order to realize automatic control of the first driving mechanism 4, the pressure sensor 14 can be connected to the controller, and the controller receives the detection signal of the pressure sensor 14. When the pressure value detected by the pressure sensor 14 reaches the set value, the controller controls the first driving mechanism 4 to stop increasing the thrust, and the thrust remains unchanged.

[0057] In order to stably fix the gear to be ground on the turntable 2, the upper part of the positioning column 10 is provided with a central threaded hole, and the lower part is provided with a central light hole 16, and the diameter of the central light hole 16 is larger than the diameter of the central threaded hole. Figure 3 As shown, the gear tensioning and positioning mechanism includes a stud 15, a pressure cylinder 17 and a rotating handle 21. The stud 15 is threadedly matched with the central threaded hole, and the lower end of the stud 15 extends into the central light hole 16. An upper drive sleeve 18 and a lower drive sleeve 24 are fixedly arranged at the lower end of the stud 15. The upper drive sleeve 18 and the lower drive sleeve 24 are fixed on the stud 15. The lower drive sleeve 24 is connected to a transmission sleeve 26, and the inner hole of the transmission sleeve 26 is truncated. Three positioning grooves are arranged at the lower end of the positioning column 10. The three positioning grooves are evenly distributed around the center line of the positioning column 10. A tensioning block 19 is arranged in each positioning groove. The tensioning block 19 is slidably matched with the positioning groove so that the tensioning block 19 can slide radially in the positioning groove. The inner wall of the tension block 19 is provided with an upper protrusion 20 and a lower protrusion 25. The upper protrusion 20 is provided with a first inclined surface. When the stud 15 moves downward, the first inclined surface can fit the outer wall of the upper drive sleeve 18, and the upper drive sleeve 18 can push the upper protrusion 20 and the tension block 19 to move radially toward the outside of the positioning column 10, so that the tension block 19 tightens the inner hole of the ground gear. The lower protrusion 25 includes a radial section and an axial section distributed in an L shape. The axial section is provided with a second inclined surface toward the side wall of the tension block 19. When the stud 15 moves upward, the transmission sleeve 26 can enter the gap between the axial section and the tension block 19, and the second inclined surface fits the inner hole wall of the transmission sleeve 26. The transmission sleeve 26 pushes the lower protrusion 25 and the tension block 19 to move radially toward the inside of the positioning column 10, thereby releasing the tension on the ground gear.

[0058] The diameter of the rotating handle 21 is larger than the diameter of the stud 15. Figure 3 and Figure 6 As shown, a transmission pin 27 is provided on the lower surface of the rotating handle 21, and a limiting column 37 perpendicular to the transmission pin 27 is provided at the lower end of the transmission pin 27, and the transmission pin 27 and the limiting column 37 are both cylindrical. A blind hole is provided at the upper end of the stud 15, and two fan-shaped limiting grooves are provided at the bottom of the blind hole, which are centrally symmetrical with respect to the center of the blind hole. The side wall of the blind hole is provided with a connecting groove extending from the upper end surface of the stud 15 to the fan-shaped limiting groove, and the transmission pin 27 is in clearance with the blind hole, and the two ends of the limiting column 37 are located in the fan-shaped limiting groove and are in clearance with the fan-shaped limiting groove. With the above structure, the rotating handle 21 can be removed from the stud 15 to facilitate the installation of the pressure cylinder 17 and its support plate 22, and the stud 15 can be driven to rotate forward and reverse by rotating the handle 21, thereby controlling the stud 15 to move up and down. The pressure cylinder 17 is sleeved on the outside of the positioning column 10 and slidably cooperates with the positioning column 10. A support plate 22 is fixedly provided on the upper end of the pressure cylinder 17. The support plate 22 is sleeved on the outside of the stud 15 and has a clearance fit with the stud 15. An elastic pad 23 is provided on the upper surface of the support plate 22. The elastic pad 23 can be made of common elastic materials such as rubber pads.

[0059] During grinding, remove the rotating handle 21, put the ground gear outside the positioning column 10, and move the ground gear so that the lower surface of the ground gear fits the turntable 2, and then put the pressing cylinder 17 outside the positioning column 10, the lower end surface of the pressing cylinder 17 contacts the upper end surface of the ground gear, and there is a gap between the support plate 22 and the upper end surface of the positioning column 10. Then align the transmission pin 27 of the rotating handle 21 with the blind hole at the top of the stud 15, and the limit column 37 with the connecting groove, move the rotating handle 21 downward, the transmission pin 27 extends into the blind hole, and the limit column 37 enters the fan-shaped limit groove at the same time, and the rotating handle 21 is rotated to drive the limit column 37 to the side of the fan-shaped limit groove, and the limit column 37 cannot move up and down. Continue to rotate the rotating handle 21 manually or with a wrench to drive the stud 15 to rotate. When the stud 15 rotates, it moves downward, so that the outer wall of the upper driving sleeve 18 contacts the first inclined surface, and pushes the upper protrusion 20 and the three tensioning blocks 19 to move radially toward the outside of the positioning column 10. The tensioning block 19 tightens the inner hole of the ground gear, so that the ground gear is coaxial with the positioning column 10. After the tensioning block 19 tightens the inner hole of the ground gear, the rotating handle 21 can just press the elastic pad 23, so that the pressing cylinder 17 presses the upper end surface of the ground gear, and the ground gear can remain stable.

[0060] After the grinding is completed, the rotating handle 21 is rotated in the reverse direction, and the limiting column 37 reaches the other side of the fan-shaped limiting groove. The rotating handle 21 is continuously rotated to drive the stud 15 to rotate in the reverse direction, so that the stud 15 moves upward, and the outer wall of the upper driving sleeve 18 leaves the first inclined surface. Then the transmission sleeve 26 can enter the gap between the axial section and the tension block 19, and the second inclined surface fits the inner hole wall of the transmission sleeve 26. The transmission sleeve 26 pushes the lower protrusion 25 and the tension block 19 to move radially toward the inner side of the positioning column 10. Figure 4 As shown, the tension block 19 is returned to the positioning groove, and the ground gear is released. Figure 5 As shown, the handle 21 is rotated at the same time to release the elastic pad 23. Then the handle 21 is rotated in the opposite direction again to drive the limit column 37 to rotate to the position aligned with the connection groove, and the handle 21 can be moved upward to be removed, and then the pressing cylinder 17 is removed, and finally the ground gear is removed.

[0061] In the present invention, the gear angle locking mechanism includes two wedge-shaped blocks 28, such as Figure 7 As shown, after the wedge-shaped block 28 extends into the tooth groove, its two side surfaces can contact the tooth surface. The wedge-shaped block 28 is connected to a second driving mechanism 29 that drives the wedge-shaped block 28 to reciprocate along the radial direction of the rotating disk 2. The two wedge-shaped blocks 28 and the grinding wheel 6 are evenly distributed around the rotating disk 2. The second driving mechanism 29 can be a hydraulic cylinder, a cylinder, etc. After the two wedge-shaped blocks 28 enter the tooth groove, they can effectively prevent the ground gear from rotating.

[0062] During the grinding process, the grinding wheel 6 generates a lot of heat, and the temperature rises, which is easy to burn the tooth surface. In order to promote the rapid heat dissipation of the grinding wheel 6, Figure 1 and Figure 2 As shown, a heat sink 30 is provided on the lifting frame 8. The heat sink 30 is made of a metal material with high thermal conductivity, such as copper, aluminum alloy, etc. The bottom plate of the heat sink 30 bulges upward to form a U-shaped heat conduction cavity. The upper part of the grinding wheel 6 is located in the heat conduction cavity, and the heat of the grinding wheel 6 can be quickly transferred to the bottom plate of the heat sink 30. The inner wall of the heat sink 30 is covered with a liquid absorbent core layer 31. The heat sink 30 is provided with a working medium, which can be pure water, etc. The top plate of the heat sink 30 is an arc-shaped plate bulging upward, and a fan 32 is provided on the top outer side of the heat sink 30. At room temperature, the working medium is liquid, and the liquid absorbent core layer 31 has a strong capillary effect, which absorbs the liquid working medium into the liquid absorbent core layer 31. During grinding, the heat of the grinding wheel 6 is transferred to the bottom plate of the heat sink 30, and the working medium on the inner side of the bottom plate evaporates into gas, absorbs heat, and the gaseous working medium flows upward to the top of the heat sink 30, and re-liquefies after being cooled. The liquefied working medium returns to the bottom of the heat sink 30 under the capillary action of the liquid-absorbing core layer 31, thus realizing circulation. The fan 32 can take away the heat from the upper end of the heat sink 30, so that the upper end temperature of the heat sink 30 is relatively low, and the gaseous medium can be quickly liquefied, thereby improving the heat dissipation efficiency.

[0063] In order to increase the vaporization speed of the liquid working medium and improve the heat dissipation efficiency, a cam 33 is provided on the rotating shaft 11, and a push rod 34 cooperating with the cam 33 is provided above the cam 33. The push rod 34 is vertically arranged, and a sliding sleeve is fixedly provided on the lifting frame 8. The push rod 34 penetrates the sliding sleeve and slides with the sliding sleeve. The lower end of the push rod 34 slides with the cam 33. The upper end of the push rod 34 is fixedly connected with a connecting plate 35, and one end of the connecting plate 35 is fixedly connected to the outer wall of the heat dissipation box 30. The heat dissipation box 30 is supported by the connecting plate 35. The edge of the connecting plate 35 can slide with the lifting frame 8, and a spring 36 is provided between the upper surface of the connecting plate 35 and the lifting frame 8. The amount of working medium filled in the heat dissipation box 30 should not be too much. At room temperature, the working medium liquid level should be flush with the surface of the liquid absorbing core layer 31 to ensure that the vaporized working medium can quickly enter the inner cavity of the heat dissipation box 30 and reduce the resistance of the gaseous working medium to escape. In the present invention, the rotating shaft 11 rotates at a high speed, driving the cam 33 to rotate at a high speed, and the cam 33 pushes the push rod 34 to move upward continuously, the spring 36 is compressed, and the push rod 34 drives the connecting plate 35 and the heat sink 30 to move upward. When the heat sink 30 moves to the highest point, the spring 36 is reset, pushing the heat sink 30, the connecting plate 35, the push rod 34, etc. to move downward. The heat sink 30 moves up and down continuously, and the moving distance is controlled at 2mm to 5mm, that is, the heat sink 30 vibrates, which can cause the surface of the liquid working medium at the bottom of the heat sink 30 to fluctuate, and some liquid working medium droplets are separated from the liquid absorbing core layer 31, and the surface area of ​​the liquid working medium is increased, thereby increasing the evaporation area of ​​the liquid working medium, increasing the heat absorption speed, and then improving the heat dissipation efficiency.

[0064] In the present invention, a temperature monitoring mechanism can be provided to monitor the temperature of the first grinding surface 61 and the second grinding surface 62. When the temperature of the first grinding surface 61 and the second grinding surface 62 is too high, the rotation speed or grinding pressure of the grinding wheel 6 can be appropriately reduced to reduce the heat generation and further prevent the tooth surface from being burned.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A spur gear tooth surface grinding device, comprising a work surface (1), a turntable (2) and a moving frame (3) being arranged on the work surface (1), the moving frame (3) being connected to a first driving mechanism (4) for driving the moving frame (3) to move linearly, a lifting frame (8) being arranged on the moving frame (3), the lifting frame (8) being connected to a lifting mechanism (9), a grinding wheel (6) being arranged on the lifting frame (8), the grinding wheel (6) being connected to a grinding motor (7); the turntable (2) being connected to a rotation driving mechanism (5) for driving the turntable (2) to rotate, characterized in that: The two side walls of the grinding wheel (6) are respectively provided with a first grinding surface (61) and a second grinding surface (62), and the first grinding surface (61) and the second grinding surface (62) can simultaneously contact the tooth surfaces of the two side walls of the same tooth groove of the gear being ground; A positioning column (10) is provided on the upper surface of the turntable (2), the positioning column (10) is coaxial with the turntable (2), and a gear tensioning positioning mechanism is provided on the positioning column (10); The work surface (1) is provided with a gear angle locking mechanism.

2. The spur gear tooth surface grinding device according to claim 1, characterized in that: The grinding wheel (6) is mounted on a rotating shaft (11), and both ends of the rotating shaft (11) are mounted on a bearing seat (13) through bearings (12). A mounting hole is provided on the lifting frame (8), and the bearing seat (13) is located in the mounting hole and is clearance-matched with the mounting hole. A pressure sensor (14) is provided between a side wall of the bearing seat (13) away from the turntable (2) and an inner wall of the mounting hole; the grinding motor (7) is connected to the rotating shaft (11).

3. The spur gear tooth surface grinding device according to claim 1 or 2, characterized in that: The upper part of the positioning column (10) is provided with a central threaded hole, and the lower part is provided with a central light hole (16), the diameter of the central light hole (16) is larger than the diameter of the central threaded hole, the gear tensioning positioning mechanism comprises a stud (15), a pressure cylinder (17) and a rotating handle (21), the stud (15) is threadedly matched with the central threaded hole, the lower end of the stud (15) extends into the central light hole (16), and the lower end of the stud (15) is fixedly provided with an upper drive sleeve (18) and a lower drive sleeve (24), and the lower drive sleeve (24) is connected to a transmission sleeve ( 26), the inner hole of the transmission sleeve (26) is truncated cone-shaped; the lower end of the positioning column (10) is provided with three positioning grooves, the three positioning grooves are evenly distributed around the center line of the positioning column (10), each of the positioning grooves is provided with a tension block (19), the inner wall of the tension block (19) is provided with an upper protrusion (20) and a lower protrusion (25), the upper protrusion (20) is provided with a first inclined surface, the first inclined surface can fit the outer wall of the upper driving sleeve (18), the lower protrusion (25) includes a radial section and an axial section distributed in an L shape, the axial section A second inclined surface is arranged on the side wall facing the tension block (19), and the transmission sleeve (26) can enter the gap between the axial section and the tension block (19), and the second inclined surface fits the inner hole wall of the transmission sleeve (26); a transmission pin (27) is arranged on the lower surface of the rotating handle (21), and a limiting column (37) perpendicular to the transmission pin (27) is arranged on the lower end of the transmission pin (27); a blind hole is arranged on the upper end of the stud (15), and two fan-shaped limiting grooves are arranged at the bottom of the blind hole, which are centrally symmetrical with respect to the center of the blind hole; and a side wall of the blind hole is arranged There is a connecting groove extending from the upper end surface of the stud (15) to the fan-shaped limit groove, the transmission pin (27) is clearance-matched with the blind hole, and the two ends of the limit column (37) are located in the fan-shaped limit groove and clearance-matched with the fan-shaped limit groove; the pressure cylinder (17) is sleeved outside the positioning column (10) and clearance-matched with the positioning column (10), and a support plate (22) is provided at the upper end of the pressure cylinder (17), and the support plate (22) is sleeved outside the stud (15) and clearance-matched with the stud (15), and an elastic pad (23) is provided on the upper surface of the support plate (22).

4. The spur gear tooth surface grinding device according to claim 1 or 2, characterized in that: The gear angle locking mechanism comprises two wedge-shaped blocks (28), the wedge-shaped blocks (28) being connected to a second driving mechanism (29) for driving the wedge-shaped blocks (28) to reciprocate radially along the rotating disk (2), and the two wedge-shaped blocks (28) and the grinding wheel (6) being evenly distributed around the rotating disk (2).

5. The spur gear tooth surface grinding device according to claim 1, characterized in that: The rotation driving mechanism (5) is a servo motor.

6. The spur gear tooth surface grinding device according to claim 2, characterized in that: A heat sink (30) is arranged on the lifting frame (8), the bottom plate of the heat sink (30) protrudes upward to form a U-shaped heat conduction cavity, the upper part of the grinding wheel (6) is located in the heat conduction cavity, the inner wall of the heat sink (30) is covered with a liquid absorbing core layer (31), a working medium is arranged in the heat sink (30), the top plate of the heat sink (30) is an arc-shaped plate protruding upward, and a fan (32) is arranged on the outer side of the top of the heat sink (30).

7. The spur gear tooth surface grinding device according to claim 6, characterized in that: A cam (33) is arranged on the rotating shaft (11), and a push rod (34) cooperating with the cam (33) is arranged above the cam (33). The push rod (34) is arranged vertically, and the upper end of the push rod (34) is fixedly connected to a connecting plate (35), one end of the connecting plate (35) is fixedly connected to the outer wall of the heat dissipation box (30), and a spring (36) is arranged between the upper surface of the connecting plate (35) and the lifting frame (8).

8. The grinding method of the spur gear tooth surface grinding device according to claim 1, characterized in that: include S1, sleeve the gear to be ground outside the positioning column (10), support the gear to be ground using the rotating disk (2), and tighten the inner hole of the gear to be ground using the gear tightening and positioning mechanism; S2, the first driving mechanism (4) pushes the movable frame (3) to move toward the gear to be ground until the grinding wheel (6) enters the tooth groove of the gear to be ground, and the first grinding surface (61) and the second grinding surface (62) respectively contact the tooth surfaces of the two side walls of the same tooth groove of the gear to be ground; S3, using the gear angle locking mechanism to lock the ground gear to prevent the ground gear from rotating; S4, using the grinding motor (7) to drive the grinding wheel (6) to rotate, and using the lifting mechanism (9) to drive the lifting frame (8) to move up and down, so that the first grinding surface (61) and the second grinding surface (62) grind the entire tooth surface; S5, after a tooth groove is ground, the gear angle locking mechanism releases the lock of the grinding gear, the first driving mechanism (4) pushes the moving frame (3) to move away from the gear to be ground, and the grinding wheel (6) exits the tooth groove; S6. Using the first driving mechanism (4) to drive the rotating disk (2) to rotate 360° / number of tooth grooves; S7. Repeat steps S2 to S6 until all tooth grooves are ground.

9. The grinding method according to claim 8, characterized in that: The grinding wheel (6) is mounted on the rotating shaft (11), and both ends of the rotating shaft (11) are mounted on the bearing seat (13) through bearings (12). The lifting frame (8) is provided with a mounting hole, and the bearing seat (13) is located in the mounting hole and is clearance-matched with the mounting hole. A pressure sensor (14) is provided between the side wall of the bearing seat (13) away from the turntable (2) and the inner wall of the mounting hole; the grinding motor (7) is connected to the rotating shaft (11); In step S2, a pressure sensor (14) is used to detect the pressure between the first grinding surface (61) and the second grinding surface (62) and the tooth surface. When the pressure reaches a set value, the first driving mechanism (4) stops moving.

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