Gear tooth surface grinding device

Abstract

The utility model discloses a gear tooth surface grinding device, which relates to the technical field of gear grinding equipment and comprises an outer frame, a table top fixedly mounted at the top of the outer frame, a bottom support fixedly mounted at the bottom of the outer frame, a water outlet pipe and a water inlet pipe fixedly mounted at the bottom of the outer frame. A plurality of sets of supporting columns placed in a regular triangle shape are fixedly installed at the bottom of the inner side of the outer frame, a notch is formed in one side of each supporting column, and a spray head is arranged in each notch. Compared with the prior art, through the arrangement of the expansion assembly, when the tooth numbers of the ground gears are different, the axis positions of the ground gears can be changed, so that the ground gears with different tooth numbers are engaged with the grinding gear ring for grinding; synchronous rotation and separation of the first transmission gear and the driving belt wheel are controlled through the arranged control shaft, the grinding assembly and the lifting assembly are linked, grinding and lifting can be completed only through one motor, the cost is reduced, and the device is easier to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of gear grinding equipment, and particularly relates to a gear tooth surface grinding device. Background Art

[0002] A gear is a common transmission device used to transmit power and rotational speed, and is commonly used in mechanical equipment and vehicles. The tooth surface of a gear directly affects its transmission efficiency and accuracy. Therefore, grinding processing is required to ensure its performance and service life. By grinding the tooth surface, the friction and loss between tooth surfaces can be reduced, the transmission efficiency of the gear can be improved, and thus the energy loss can be reduced. Grinding can remove the irregularities and errors on the tooth surface, making the dimensions such as tooth pitch, tooth profile, and addendum circle of the gear meet the design requirements, improving the accuracy and stability of the gear, and reducing noise and vibration.

[0003] Chinese Patent with publication number CN116493688B discloses a high-efficiency tooth surface grinding machine for noise-reducing gears, including a frame, an internal gear sleeve, a rotating shaft sleeve, a transmission gear disc, and an upper pressing disc. When this device is in use, it can only grind gears of a single size, and cannot grind other gears of the same model but with different numbers of teeth (i.e., the module and pressure angle of the gears are the same, but the number of teeth is different). The scope of application is limited. For this reason, we propose a gear tooth surface grinding device to solve the problem that the prior art cannot grind other gears of the same model with different numbers of teeth. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a gear tooth surface grinding device to solve the problem that the prior art cannot grind other gears of the same model with different numbers of teeth as proposed in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A gear tooth surface grinding device, including: an outer frame, a table is fixedly installed on the top of the outer frame, a bottom support is fixedly installed at the bottom of the outer frame, a water outlet pipe and a water inlet pipe are fixedly installed at the bottom of the outer frame, a plurality of groups of support columns placed in an equilateral triangle are fixedly installed at the inner bottom of the outer frame, there is a notch on one side of the support column and a nozzle is arranged in the notch, a pipeline is arranged inside the support column, the bottoms of the support columns are connected through the pipeline, the bottom of the support column is communicated with the water inlet pipe, and the bottom of the outer frame is communicated with the water outlet pipe;

[0006] A grinding assembly, which is rotatably installed at the inner bottom of the outer frame, and the grinding assembly is used for grinding the tooth surface of the gear to be ground;

[0007] An expansion assembly, which is slidably installed on the support column, and the expansion assembly is used to adapt to different gears to be ground and press the gear to be ground against the grinding assembly;

[0008] The lifting assembly is rotatably installed at the top of the bottom support, and the lifting assembly is used to control the rising and falling of the expansion assembly.

[0009] Preferably, the grinding assembly includes a grinding gear ring rotatably installed on the inner bottom of the outer frame. The inner wall of the grinding gear ring is provided with grinding teeth. A driving gear ring is fixedly installed at the outer bottom of the grinding gear ring. A first transmission gear is rotatably installed on the inner bottom of the outer frame. A spline key groove is provided at the axis of the first transmission gear. A driving motor is fixedly installed at the bottom of the tabletop. The output end of the driving motor is fixedly installed with a driving gear. The driving gear is meshed with the first transmission gear. The first transmission gear is meshed with the driving gear ring.

[0010] Preferably, the expansion assembly includes a sliding bushing slidably installed on the support column. The bottom of the sliding bushing is fixedly installed with an expansion bottom plate. The top of the expansion bottom plate is fixedly installed with a fixing frame. Multiple groups of expansion arms are hingedly installed on the fixing frame. A rotating sleeve is rotatably installed on the expansion arm. The rotating sleeve is sleeved inside the gear to be ground. A slider is fixedly installed on one side of the expansion arm. An adjusting frame is hingedly installed at the center of the top of the expansion bottom plate. The adjusting frame is located below the fixing frame and the center of the top is rotatably connected to the fixing frame. Multiple groups of sliding sleeves are hingedly installed on the adjusting frame. The sliding sleeves are slidably sleeved outside the slider. A first adjusting gear is fixedly installed at the center of the top of the adjusting frame. A ratchet is rotatably installed at the top of the fixing frame. A second adjusting gear is rotatably installed at the bottom of the fixing frame. The second adjusting gear is fixedly connected to the ratchet. The second adjusting gear is meshed with the first adjusting gear. A handle is fixedly installed at the top of the ratchet. A two-way pawl is hingedly installed at the top of the fixing frame. The two-way pawl is matched with the ratchet. A spring piece is fixedly installed at the top of the fixing frame. The spring piece is adapted to the two-way pawl.

[0011] Preferably, the lifting assembly includes a driven pulley rotatably installed at the top of the bottom support. A driving pulley is rotatably installed at the top of the bottom support. The driven pulley and the driving pulley are driven by a belt. A spline key groove is provided at the axis of the driving pulley. A threaded rod is fixedly installed at the top of the driven pulley. The threaded rod passes through the bottom of the outer frame. A thread is provided on the part of the threaded rod inside the outer frame. The threaded rod is in threaded connection with the expansion bottom plate. A control shaft is slidably installed on the tabletop. The control shaft is adapted to the first transmission gear and the driving pulley. A pressing rod is hingedly installed at the top of the tabletop. A chute is provided on the pressing rod. A pressing block is rotatably installed at the top of the control shaft. A rotating shaft is provided on the pressing block and is slidably connected to the chute on the pressing rod.

[0012] Preferably, the expansion arm is U-shaped, the fixing frame is in the shape of a regular triangular prism, rotating columns are arranged on the three corners of the fixing frame, the rotating columns of the fixing frame are hinged to the expansion arm, the adjusting frame is in the shape of a regular triangular prism, rotating columns are arranged on the three corners of the adjusting frame, and the rotating columns of the adjusting frame are hinged to the sliding sleeve.

[0013] Preferably, teeth adapted to the ratchet are arranged on both sides of the bi-directional pawl, a columnar protrusion is arranged on one side of the bi-directional pawl, and the spring piece is U-shaped.

[0014] Preferably, two sections of splines are arranged on the outer side of the control shaft, and the positions of the splines are respectively adapted to the first transmission gear and the driving pulley, and a spring is fixed between the bottom of the pressing block and the table top.

[0015] The technical effects and advantages of the present utility model:

[0016] The structure of the present utility model is reasonable. Through the cooperation of the expansion arm, the slider, the sliding sleeve and the adjusting frame, when the number of teeth of the gear to be ground is different, the axial position of the gear to be ground can be changed to make the gears to be ground with different numbers of teeth mesh with the grinding gear ring for grinding, so that the application range of the device is wider and the practicability of the device is increased;

[0017] In the present utility model, the synchronous rotation and separation of the first transmission gear and the driving pulley are controlled by the control shaft arranged. Compared with the prior art, the on-off of the power is controlled by the lifting of the control shaft, and the grinding assembly and the lifting assembly are linked. Only one motor is needed to complete grinding and lifting, which reduces the cost and makes the operation of the device simpler. Description of the Drawings

[0018] Figure 1 is a front three-dimensional structural schematic diagram of the present utility model;

[0019] Figure 2 is a bottom three-dimensional structural schematic diagram of the present utility model;

[0020] Figure 3 is a three-dimensional structural schematic diagram of the grinding gear ring of the present utility model;

[0021] Figure 4 is a three-dimensional structural schematic diagram of the lifting assembly of the present utility model;

[0022] Figure 5 is a three-dimensional structural schematic diagram of the expansion assembly of the present utility model;

[0023] Figure 6 is a three-dimensional structural schematic diagram of the adjusting frame of the present utility model;

[0024] Figure 7 is a structural schematic diagram of the bi-directional pawl of the present utility model;

[0025] Figure 8 For the present utility model Figure 3 is an enlarged view of part A in the present utility model;

[0026] Figure 9 For the present utility model Figure 4 is an enlarged view of part B in the present utility model;

[0027] Figure 10 is a schematic perspective view of the support column of the present utility model.

[0028] In the figure: 1. Outer frame; 2. Table top; 3. Bottom support; 4. Water outlet pipe; 5. Water inlet pipe; 6. Support column; 7. Grinding gear ring; 8. Driving motor; 9. Driving gear; 10. First transmission gear; 11. Expanding bottom plate; 12. Sliding bushing; 13. Expanding arm; 14. Rotating sleeve; 15. Driving gear ring; 16. Slide block; 17. Slide sleeve; 18. Adjusting frame; 19. First adjusting gear; 20. Second adjusting gear; 21. Fixed frame; 22. Ratchet; 23. Double - acting pawl; 24. Spring plate; 25. Driving pulley; 26. Threaded rod; 27. Control shaft; 28. Pressing block; 29. Pressing rod; 30. Driven pulley; 31. Handle. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] Such as Figures 1 to 10The shown gear tooth surface grinding device includes: an outer frame 1, a table 2 is fixedly installed at the top of the outer frame 1, a bottom support 3 is fixedly installed at the bottom of the outer frame 1, a water outlet pipe 4 and a water inlet pipe 5 are fixedly installed at the bottom of the outer frame 1, a plurality of support columns 6 placed in an equilateral triangle are fixedly installed at the inner bottom of the outer frame 1, a notch is provided on one side of the support column 6 and a spray head is arranged in the notch, a pipeline is arranged inside the support column 6, the bottoms of the support columns 6 are communicated through the pipeline, the bottom of the support column 6 is communicated with the water inlet pipe 5, and the bottom of the outer frame 1 is communicated with the water outlet pipe 4; a grinding assembly, which is rotatably installed at the inner bottom of the outer frame 1 and is used for grinding the tooth surface of the gear to be ground; an expansion assembly, which is slidably installed on the support column 6 and is used for adapting to different gears to be ground and pressing the gear to be ground against the grinding assembly; a lifting assembly, which is rotatably installed at the top of the bottom support 3 and is used for controlling the rise and fall of the expansion assembly; during use, through the linkage of the lifting assembly and the grinding assembly, the expansion assembly is controlled to move upward until it is completely exposed. At this time, the gear to be ground can be installed on the expansion assembly. Subsequently, the expansion assembly is controlled to descend by the lifting assembly. After reaching the bottom, through the adjustment of the expansion assembly, the gear to be ground extends outward and meshes with the grinding assembly. At this time, the grinding assembly is started to grind the gear to be ground, and the grinding liquid is sprayed on the grinding assembly through the support column 6. The grinding liquid is recycled through the water outlet pipe 4. By arranging a spray head at the notch provided on the support column 6, the grinding liquid can be sprayed while the support column 6 realizes the sliding support column, making the space utilization rate higher. Compared with the prior art, through the arranged expansion assembly for adjustment, gears to be ground with the same model but different number of teeth can all be adjusted to cooperate with the grinding assembly, solving the problem that the prior art cannot grind other gears with the same model but different number of teeth. At the same time, through the linkage of the grinding assembly and the lifting assembly, lifting and grinding are achieved by using one motor, making the manufacturing cost lower.

[0031] Such as Figure 1 And Figure 3As shown in the figure, the grinding assembly includes a grinding gear ring 7 rotatably mounted on the inner bottom of the outer frame 1. The inner wall of the grinding gear ring 7 is provided with grinding teeth. The outer bottom of the grinding gear ring 7 is fixedly provided with a driving gear ring 15. A first transmission gear 10 is rotatably mounted on the inner bottom of the outer frame 1. A spline key groove is provided at the axis of the first transmission gear 10. A driving motor 8 is fixedly mounted at the bottom of the table 2. The output end of the driving motor 8 is fixedly mounted with a driving gear 9. The driving gear 9 is meshed with the first transmission gear 10. The first transmission gear 10 is meshed with the driving gear ring 15. The driving motor 8 is provided to provide power to the driving gear ring 15, drive the grinding gear ring 7 to rotate, grind the gear to be ground meshed with the grinding gear ring 7, and through the linkage with the lifting assembly, transmit the power of the driving motor 8 to the lifting assembly. When the number of teeth of the gear to be ground is different, the radius of the gear to be ground is also different. Compared with the prior art, setting the grinding gear ring 7 as the active part can facilitate the adjustment of the gear to be ground.

[0032] As Figure 1 , Figure 5 , Figure 6 and Figure 7As shown, the expansion component includes a sliding bushing 12 slidably mounted on the support column 6. A bottom plate 11 of the sliding bushing 12 is fixedly mounted at the bottom. A fixing frame 21 is fixedly mounted on the top of the bottom plate 11. A plurality of expansion arms 13 are hingedly mounted on the fixing frame 21. The fixing frame 21 is in the shape of a regular triangular prism. Rotating columns are provided on the three corners of the fixing frame 21. The rotating columns of the fixing frame 21 are hingedly connected to the expansion arms 13. The expansion arms 13 are in the shape of a U. A rotating sleeve 14 is rotatably mounted on the expansion arms 13. The rotating sleeve 14 is sleeved inside the gear to be ground. A slider 16 is fixedly mounted on one side of the expansion arm 13. A central adjusting frame 18 is hingedly mounted at the center of the top of the bottom plate 11. The adjusting frame 18 is located below the fixing frame 21 and is rotatably connected to the center of the top of the fixing frame 21. A plurality of sliding sleeves 17 are hingedly mounted on the adjusting frame 18. The adjusting frame 18 is in the shape of a regular triangular prism. Rotating columns are provided on the three corners of the adjusting frame 18. The rotating columns of the adjusting frame 18 are hingedly connected to the sliding sleeves 17. The sliding sleeves 17 are slidably sleeved outside the slider 16. A first adjusting gear 19 is fixedly mounted at the center of the top of the adjusting frame 18. A ratchet 22 is rotatably mounted on the top of the fixing frame 21. A second adjusting gear 20 is rotatably mounted at the bottom of the fixing frame 21. The second adjusting gear 20 is fixedly connected to the ratchet 22. The second adjusting gear 20 is meshed with the first adjusting gear 19. A handle 31 is fixedly mounted on the top of the ratchet 22. A two-way pawl 23 is hingedly mounted on the top of the fixing frame 21. A columnar protrusion is provided on one side of the two-way pawl 23. Teeth adapted to the ratchet 22 are provided on both sides of the two-way pawl 23. A spring piece 24 is fixedly mounted on the top of the fixing frame 21. The spring piece 24 is in the shape of a U and is adapted to the two-way pawl 23;The ground gear is first mounted on the matching rotating sleeve 14, and then the rotating sleeve 14 is sleeved on the expansion arm 13, so that the ground gear can rotate freely on the expansion arm 13. Through the cooperation of the ratchet 22, the two-way pawl 23 and the spring sheet 24, the ratchet 22 can be controlled to achieve positive and reverse self-locking by toggling the two-way pawl 23. Under the action of the spring sheet 24, the two-way pawl 23 will be squeezed to the other side by the spring sheet 24 when it is toggled over the center line of the spring sheet 24. At this time, one side tooth of the two-way pawl 23 fits with the ratchet 22 to achieve positive self-locking. When the two-way pawl 23 is toggled to the other side of the spring sheet 24, the other side tooth of the two-way pawl 23 fits with the ratchet 22 to achieve reverse self-locking, which can prevent the ground gear from rebounding during the grinding process. After the lifting assembly lowers the expansion assembly to the bottom, the handle 31 is manually rotated, and the handle 31 drives the second adjustment gear 20 and the first adjustment gear 19 to rotate, so that the adjustment frame 18 rotates accordingly. Since one end of the sliding sleeve 17 is hinged at The slide sleeve 17 is mounted on the triangle of the adjustment frame 18, and the slide sleeve 17 is mounted on the slider 16, and one end of the slider 16 is fixed on the expansion arm 13, that is, one end of the slider 16 is slidably connected to the slide sleeve 17, and the other end is hinged to the expansion base plate 11 through the expansion arm 13. When the adjustment frame 18 rotates, the slide sleeve 17 will be pulled to slide on the slider 16, and at the same time, the angle between the adjustment frame 18 and the triangle of the expansion arm 13 changes, so that the slide sleeve 17 drives the slider 16 to rotate, and drives the expansion arm 13 to rotate. The expansion arm 13 is installed with a ground gear, that is, the distance between the ground gear and the axis of the expansion base plate 11 changes with the rotation of the handle 31, and the distance between the inner ring of the grinding gear ring 7 and the axis of the expansion base plate 11 is constant. Compared with the prior art, when the number of teeth of the ground gear is different, the axis position of the ground gear can be changed to make the ground gears with different numbers of teeth mesh with the grinding gear ring 7 for grinding, so that the application range of the device is wider and the practicality of the device is increased. ;

[0033] like Figure 3 , Figure 4 , Figure 8 and Figure 9As shown in the figure, the lifting component includes a driven pulley 30 rotatably installed on the top of the bottom support 3. A driving pulley 25 is rotatably installed on the top of the bottom support 3. The driven pulley 30 and the driving pulley 25 are driven by a belt. A spline key groove is provided at the axis of the driving pulley 25. A threaded rod 26 is fixedly installed on the top of the driven pulley 30. The threaded rod 26 passes through the bottom of the outer frame 1. A thread is provided on the part of the threaded rod 26 located inside the outer frame 1. The threaded rod 26 is threadedly connected to the expansion bottom plate 11. A control shaft 27 is slidably installed on the table 2. The control shaft 27 is adapted to the first transmission gear 10 and the driving pulley 25. A pressure rod 29 is hingedly installed on the top of the table 2. A chute is provided on the pressure rod 29. A pressure block 28 is rotatably installed on the top of the control shaft 27. A rotating shaft on the pressure block 28 is slidably connected to the chute on the pressure rod 29; when controlling the lifting, by pulling the pressure rod 29 downwards, the spline on the control shaft 27 is simultaneously engaged with the first transmission gear 10 and the driving pulley 25, so that the first transmission gear 10 and the driving pulley 25 rotate synchronously, transmitting the power of the driving motor 8 to the driving pulley 25, and then transmitting the power to the driven pulley 30 through the belt. The driven pulley 30 drives the threaded rod 26 to rotate. The expansion bottom plate 11 drives the entire expansion component to rise and fall under the drive of the threaded rod 26. The length of the threaded rod 26 is lower than that of the support column 6. When the driving motor 8 rotates forward, when the expansion bottom plate 11 gradually rises until it disengages from the threaded rod 26, the expansion bottom plate 11 reaches the highest end and the expansion bottom plate 11 does not disengage from the support column 6. At this time, the expansion bottom plate 11 will not rise, and the gear to be ground can be installed and disassembled. When the driving motor 8 rotates in reverse, the expansion bottom plate 11 starts to descend until it reaches the bottom of the support column 6 and then stops. At this time, the pressure rod 29 is lifted, and the spline on the control shaft 27 is disengaged from the first transmission gear 10 and the driving pulley 25. The control shaft 27 remains in the disengaged state under the action of the spring. At this time, the grinding component is separated from the lifting component, and the grinding component can grind the gear to be ground. Compared with the prior art, by controlling the lifting of the control shaft 27 to control the on-off of the power, the grinding component and the lifting component are linked, and only one motor is needed to complete grinding and lifting, reducing the cost and making the operation of the device simpler.

[0034] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Gear tooth surface grinding device, characterized in that: include: An outer frame (1), wherein a tabletop (2) is fixedly mounted on the top of the outer frame (1), a bottom bracket (3) is fixedly mounted on the bottom of the outer frame (1), a water outlet pipe (4) and a water inlet pipe (5) are fixedly mounted on the bottom of the inner side of the outer frame (1), a plurality of groups of support columns (6) arranged in an equilateral triangle are fixedly mounted on the inner bottom of the outer frame (1), a notch is provided on one side of the support column (6) and a nozzle is provided in the notch, a pipe is provided inside the support column (6), the bottom of the support column (6) is connected through the pipe, the bottom of the support column (6) is connected to the water inlet pipe (5), and the bottom of the outer frame (1) is connected to the water outlet pipe (4); a grinding assembly, which is rotatably mounted on the inner bottom of the outer frame (1), and the grinding assembly is used to grind the tooth surface of the gear to be ground; An expansion assembly, which is slidably mounted on the support column (6), and is used to adapt to different ground gears and squeeze the ground gears onto the grinding assembly; A lifting assembly is rotatably mounted on the top of the base (3), and the lifting assembly is used to control the rise and fall of the expansion assembly.

2. The gear tooth surface grinding device according to claim 1, characterized in that: The grinding assembly comprises a grinding gear ring (7) rotatably mounted on the inner bottom of the outer frame (1), the inner wall of the grinding gear ring (7) being provided with grinding teeth, a driving gear ring (15) being fixedly mounted on the outer bottom of the grinding gear ring (7), a first transmission gear (10) being rotatably mounted on the inner bottom of the outer frame (1), a spline keyway being provided at the axis of the first transmission gear (10), a driving motor (8) being fixedly mounted on the bottom of the table (2), a driving gear (9) being fixedly mounted on the output end of the driving motor (8), the driving gear (9) being meshed with the first transmission gear (10), and the first transmission gear (10) being meshed with the driving gear ring (15).

3. The gear tooth surface grinding device according to claim 2, characterized in that: The expansion assembly comprises a sliding sleeve (12) slidably mounted on a support column (6); an expansion base plate (11) is fixedly mounted on the bottom of the sliding sleeve (12); a fixed frame (21) is fixedly mounted on the top of the expansion base plate (11); a plurality of groups of expansion arms (13) are hingedly mounted on the fixed frame (21); a rotating sleeve (14) is rotatably mounted on the expansion arm (13); the rotating sleeve (14) is sleeved and mounted inside the ground gear; a sliding block (16) is fixedly mounted on one side of the expansion arm (13); an adjustment frame (18) is hingedly mounted in the middle of the top of the expansion base plate (11); the adjustment frame (18) is located below the fixed frame (21) and is rotatably connected to the fixed frame (21) at the top center; a plurality of groups of sliding sleeves (17) are hingedly mounted on the adjustment frame (18); the sliding sleeves (17) The sliding sleeve is arranged on the outer side of the sliding block (16); a first adjusting gear (19) is fixedly installed in the middle of the top of the adjusting frame (18); a ratchet (22) is rotatably installed on the top of the fixing frame (21); a second adjusting gear (20) is rotatably installed on the bottom of the fixing frame (21); the second adjusting gear (20) is fixedly connected to the ratchet (22); the second adjusting gear (20) is meshed with the first adjusting gear (19); a handle (31) is fixedly installed on the top of the ratchet (22); a bidirectional pawl (23) is hingedly installed on the top of the fixing frame (21); the bidirectional pawl (23) is matched with the ratchet (22); a spring sheet (24) is fixedly installed on the top of the fixing frame (21); the spring sheet (24) is matched with the bidirectional pawl (23).

4. The gear tooth surface grinding device according to claim 3, characterized in that: The lifting assembly comprises a driven pulley (30) rotatably mounted on the top of a base (3); a driving pulley (25) is rotatably mounted on the top of the base (3); the driven pulley (30) and the driving pulley (25) are driven by a belt; a spline keyway is provided at the axis of the driving pulley (25); a threaded rod (26) is fixedly mounted on the top of the driven pulley (30); the threaded rod (26) passes through the bottom of the outer frame (1); and a portion of the threaded rod (26) located inside the outer frame (1) is provided. The table (2) has a thread, the threaded rod (26) is threadedly connected to the expansion base plate (11), a control shaft (27) is slidably mounted on the table (2), the control shaft (27) is matched with the first transmission gear (10) and the driving pulley (25), a pressure rod (29) is hingedly mounted on the top of the table (2), a slide groove is arranged on the pressure rod (29), a pressure block (28) is rotatably mounted on the top of the control shaft (27), and a rotating shaft is arranged on the pressure block (28) and is slidably connected to the slide groove on the pressure rod (29).

5. The gear tooth surface grinding device according to claim 3, characterized in that: The expansion arm (13) is U-shaped, the fixing frame (21) is in the shape of a regular triangular prism, a rotating column is provided on the triangle of the fixing frame (21), the rotating column of the fixing frame (21) is hingedly arranged with the expansion arm (13), and the adjustment frame (18) is in the shape of a regular triangular prism, a rotating column is provided on the triangle of the adjustment frame (18), and the rotating column of the adjustment frame (18) is hingedly arranged with the sliding sleeve (17).

6. The gear tooth surface grinding device according to claim 3, characterized in that: Teeth matching the ratchet wheel (22) are arranged on both sides of the bidirectional pawl (23); a columnar protrusion is arranged on one side of the bidirectional pawl (23); and the spring sheet (24) is U-shaped.

7. The gear tooth surface grinding device according to claim 4, characterized in that: Two sections of splines are arranged on the outer side of the control shaft (27), and the positions of the splines are respectively matched with the first transmission gear (10) and the driving pulley (25), and a spring is fixed between the bottom of the pressure block (28) and the table top (2).

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