A tapping device for exhaust fan motor support

Abstract

This invention discloses a tapping device for an exhaust fan motor bracket, relating to the technical field of exhaust fan parts processing equipment. The tapping device for the exhaust fan motor bracket includes a fixed bracket, a fixed platform fixedly mounted on the rear side of the fixed bracket, a hollow platform on the top of the fixed platform, a housing rotatably mounted on the top of the fixed bracket, a telescopic rod slidably mounted on the bottom of the housing, and a connecting plate fixedly mounted on the bottom of the telescopic rod. This tapping device uses a servo motor to achieve automatic lifting and synchronous rotation of the tap, replacing manual operation, reducing labor intensity, and improving processing efficiency; it can automatically switch workstations, cooperate with integrated processes, and is suitable for batch production. Through taper positioning and bidirectional guide fine adjustment, it ensures that the tap and the pre-drilled hole are coaxial, avoiding misalignment and significantly improving tapping accuracy and product qualification rate. Symmetrical clamping ensures uniform force on the workpiece and secure fixation; mechanical drive reduces safety hazards and ensures processing consistency and quality stability.

Description

Technical Field

[0001] This invention relates to the field of exhaust fan parts processing equipment technology, and in particular to a tapping device for an exhaust fan motor bracket. Background Technology

[0002] Exhaust fans, as core equipment for indoor ventilation, are widely used in homes, industries, and public spaces. They mainly consist of a casing, motor bracket, motor, and fan blades. The motor bracket, as a key component supporting the motor, requires threaded holes for a secure assembly with the motor. Therefore, the quality of the tapping process on the bracket directly affects the overall assembly accuracy and operational stability of the exhaust fan.

[0003] For example, Chinese document CN104368883A describes a tapping device, which includes a rotating body with a tap and a support rod connected to it. The tap and support rod extend in opposite directions from the main body of the rotating body and are arranged concentrically. The rotating body and the tap are detachably fixed together, while the rotating body and the support rod are rotatably coupled. In use, the tap is vertically aligned with the hole on the workpiece to be tapped. The operator holds the support rod with one hand to stabilize the tapping device, and uses the other hand to push or rotate the rotating body around the support rod. This causes the tap to rotate, thus achieving tapping. The support rod provides strong self-fixation for the tapping device during tapping, preventing tap deviation and ensuring tapping reliability. It also facilitates manual operation and effectively improves tapping efficiency.

[0004] The aforementioned tapping device is operated manually by hand, relying on human power to drive the tap to rotate and tap. Manual tapping is not only labor-intensive, but also laborious and inefficient when dealing with metal supports. Furthermore, problems such as device tilting and tap deviation are prone to occur during the hand operation, resulting in deviation of the thread hole position and damage to the thread profile, which seriously reduces the tapping accuracy and product qualification rate. Summary of the Invention

[0005] The purpose of this invention is to provide a tapping device for an exhaust fan motor bracket, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a tapping device for an exhaust fan motor bracket, comprising a fixed bracket, a fixed platform fixedly mounted on the rear side of the fixed bracket, a hollow platform provided on the top of the fixed platform, a housing rotatably mounted on the top of the fixed bracket, a telescopic rod slidably mounted on the bottom of the housing, a connecting plate fixedly mounted on the bottom of the telescopic rod, a rotating shaft rotatably mounted on the connecting plate, a chuck fixedly mounted on the bottom end of the rotating shaft, the chuck clamping a tap, a control panel fixedly mounted on the front outer wall of the fixed platform, and further comprising a clamping assembly mounted on the hollow platform for clamping and fixing the workpiece; a lifting assembly mounted on the housing and the telescopic rod for driving the telescopic rod, the connecting plate, the rotating shaft, the chuck, and the tap to rise and fall; a linkage assembly mounted on the housing, the rotating shaft, and the lifting assembly for driving the rotating shaft, the chuck, and the tap to rotate through the cooperation of the housing, the rotating shaft, the lifting assembly, and the linkage assembly; a positioning assembly mounted on the connecting plate; and a movable assembly mounted between the fixed bracket and the hollow platform for positioning the workpiece through the cooperation of the positioning assembly and the movable assembly.

[0007] Preferably, the clamping assembly includes a fixed sleeve, a threaded rod, a telescopic cylinder, a clamping plate, a rotating rod, a knob, a first synchronous gear, a second synchronous gear, and a synchronous toothed belt. The fixed sleeve is fixedly installed on one outer wall of the hollow platform, the threaded rod is rotatably installed on one side of the hollow platform, the telescopic cylinder is slidably installed on the inner side of the fixed sleeve, the clamping plate is fixedly installed on one side of the telescopic cylinder, and the other side of the telescopic cylinder is threadedly installed on the outer wall of the threaded rod. The rotating rod is rotatably installed on both sides of the hollow platform, the knob is fixedly installed on one end of the rotating rod, the first synchronous gear is fixedly installed on the outer wall of the rotating rod, the second synchronous gear is fixedly installed on the outer wall of the threaded rod, and the synchronous toothed belt is sleeved on the first synchronous gear and the second synchronous gear. The synchronous toothed belt meshes with both the first synchronous gear and the second synchronous gear, clamping the workpiece synchronously, with uniform force and less prone to loosening.

[0008] Preferably, the fixed sleeve, threaded rod, telescopic cylinder, clamping plate, knob, first synchronous gear, second synchronous gear, and synchronous toothed belt are all in two sets and arranged symmetrically from left to right.

[0009] Preferably, the lifting assembly includes a first servo motor and a lead screw. The first servo motor is fixedly installed on the top outer wall of the chassis, the lead screw is rotatably installed on the top of the chassis, the bottom of the telescopic rod is threaded onto the outer wall of the lead screw, and the output shaft of the first servo motor is fixedly installed on the top end of the lead screw. The first servo motor drives the lead screw to realize the automatic lifting of the tap.

[0010] Preferably, the linkage assembly includes a hollow rod, a first gear, and a second gear. The hollow rod is rotatably mounted on the bottom of the housing, the first gear is fixedly mounted on the outer wall of the hollow rod, and the second gear is fixedly mounted on the outer wall of the lead screw. The second gear meshes with the first gear, and the top end of the rotating shaft is slidably mounted on the inner side of the hollow rod, so that the tap rotates synchronously, completely replacing manual force application.

[0011] Preferably, the positioning assembly includes a movable rod, a cone, a push rod, and a return spring. The movable rod is slidably mounted on the connecting plate, the cone is fixedly mounted on the bottom end of the movable rod, the push rod is fixedly mounted on the front side of the movable rod, and the return spring is sleeved on the movable rod. The cone and the tap are symmetrically arranged on the left and right sides below the machine housing to ensure that the tap and the pre-drilled hole are strictly coaxial. During the tapping process, the tap is fed vertically, and there will be no tilting or offset caused by hand operation.

[0012] Preferably, the movable component includes a first guide rod, a second guide rod, and a slider. The inner walls on both sides of the fixed platform are provided with first sliding grooves, and the inner walls on the front and rear sides of the fixed platform are provided with second sliding grooves. The first guide rod is slidably installed in the first sliding groove, and the second guide rod is slidably installed in the second sliding groove. The first guide rod and the second guide rod are arranged perpendicularly and alternately. The slider is slidably installed on the first guide rod and the second guide rod, and the top of the slider is fixedly installed on the bottom of the hollow platform.

[0013] Preferably, a second servo motor is fixedly installed on the top outer wall of the fixed bracket, a first bevel gear is fixedly installed on the output shaft of the second servo motor, and a second bevel gear is fixedly installed on the outer wall of the machine housing. The second bevel gear meshes with the first bevel gear, which can drive the machine housing and the tap to rotate and switch positions. Combined with the integrated process of clamping, positioning and tapping, the auxiliary time is greatly shortened and the continuous processing efficiency is significantly improved, making it suitable for mass production.

[0014] Preferably, the transmission ratio between the first synchronous gear and the second synchronous gear is 1:1, the transmission ratio between the first gear and the second gear is 1:1, and the transmission ratio between the first bevel gear and the second bevel gear is 10:1.

[0015] Preferably, the top and bottom of the hollow platform are threaded with fixing bolts, and one end of the fixing bolt is in contact with the top of the platform.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This tapping device for exhaust fan motor brackets uses a first servo motor to drive the lead screw to achieve automatic tap lifting and lowering, and a gear linkage structure to make the tap rotate synchronously, completely replacing manual force application and solving the problem of laborious processing of metal workpieces by traditional devices. At the same time, the second servo motor can drive the machine box and tap to rotate and switch positions. With the integrated process of clamping, positioning and tapping, the auxiliary time is greatly shortened and the continuous processing efficiency is significantly improved, making it suitable for mass production. The device quickly aligns the cone of the positioning component with the pre-drilled hole of the workpiece. With the help of the bidirectional guide rod and slider of the movable component, the hollow table and the workpiece can be freely fine-tuned in the plane, ensuring that the tap and the pre-drilled hole are strictly coaxial. During the tapping process, the tap is fed vertically, and there will be no tilting or offset caused by hand operation. This effectively improves the thread processing accuracy and ensures that the size and position accuracy of the exhaust fan motor bracket mounting hole meet the standards. Employing symmetrical clamping components, the device uses synchronized gears, toothed belts, and threaded rods to simultaneously clamp the workpiece between the two side plates. This ensures even force distribution and prevents loosening. The hollow platform can be quickly locked in place with fixing bolts, preventing displacement during processing and further enhancing overall rigidity. The entire process is mechanically driven and positioned, eliminating the need for manual intervention, reducing operational safety hazards, ensuring consistent processing results for each workpiece, and improving the yield rate and product quality stability. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a front view of the present invention; Figure 3 This is a schematic diagram of the structure of the active component of the present invention; Figure 4 This is a cross-sectional view of the chassis of the present invention; Figure 5 This is a cross-sectional view of the telescopic rod of the present invention; Figure 6 This is a cross-sectional view of the hollow platform of the present invention; Figure 7 This is a schematic diagram of the clamping component of the present invention.

[0018] Reference numerals: 1. Fixed bracket; 2. Fixed platform; 3. Hollow platform; 4. Fixed sleeve; 5. Threaded rod; 6. Telescopic cylinder; 7. Clamping plate; 8. Rotating rod; 9. Knob; 10. First synchronous gear; 11. Second synchronous gear; 12. Synchronous toothed belt; 13. Chassis; 14. Telescopic rod; 15. Connecting plate; 16. Rotating shaft; 17. Chuck; 18. Tap; 19. First servo motor; 20. Lead screw; 21. Hollow rod; 22. First gear; 23. Second gear; 24. Movable rod; 25. Cone head; 26. Push rod; 27. Return spring; 28. First guide rod; 29. ​​Second guide rod; 30. Slider; 31. Fixing bolt; 32. Control panel; 33. Second servo motor; 34. First bevel gear; 35. Second bevel gear. Detailed Implementation

[0019] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0020] Please see Figure 1-7 This invention provides a technical solution: a tapping device for an exhaust fan motor bracket, comprising a fixed bracket 1, a fixed platform 2 fixedly mounted on the rear side of the fixed bracket 1, a hollow platform 3 provided on the top of the fixed platform 2, a housing 13 rotatably mounted on the top of the fixed bracket 1, a telescopic rod 14 slidably mounted on the bottom of the housing 13, a connecting plate 15 fixedly mounted on the bottom of the telescopic rod 14, a rotating shaft 16 rotatably mounted on the connecting plate 15, a chuck 17 fixedly mounted on the bottom end of the rotating shaft 16, a tap 18 clamped in the chuck 17, a control panel 32 fixedly mounted on the front outer wall of the fixed platform 2, and further comprising a device mounted on the hollow platform 3. The clamping assembly is used to clamp and fix the workpiece; the lifting assembly installed on the housing 13 and the telescopic rod 14 is used to drive the telescopic rod 14, the connecting plate 15, the rotating shaft 16, the chuck 17, and the tap 18 to rise and fall; the linkage assembly installed on the housing 13, the rotating shaft 16, and the lifting assembly is used to drive the rotating shaft 16, the chuck 17, and the tap 18 to rotate through the cooperation of the housing 13, the rotating shaft 16, the lifting assembly, and the linkage assembly; the positioning assembly installed on the connecting plate 15 and the movable assembly installed between the fixed bracket 1 and the hollow table 3 are used to position the workpiece through the cooperation of the positioning assembly and the movable assembly.

[0021] Furthermore, the clamping assembly includes a fixed sleeve 4, a threaded rod 5, a telescopic cylinder 6, a clamping plate 7, a rotating rod 8, a knob 9, a first synchronous gear 10, a second synchronous gear 11, and a synchronous toothed belt 12. The fixed sleeve 4 is fixedly installed on one side of the outer wall of the hollow platform 3. The threaded rod 5 is rotatably installed on one side of the hollow platform 3. The telescopic cylinder 6 is slidably installed on the inner side of the fixed sleeve 4. The clamping plate 7 is fixedly installed on one side of the telescopic cylinder 6. The other side of the telescopic cylinder 6 is threadedly installed on the outer wall of the threaded rod 5. The rotating rod 8 is rotatably installed on both sides of the hollow platform 3. The knob 9 is fixedly installed on one end of the rotating rod 8. The first synchronous gear 10 is fixedly installed on the outer wall of the rotating rod 8. The second synchronous gear 11 is fixedly installed on the outer wall of the threaded rod 5. The synchronous toothed belt 12 is sleeved on the first synchronous gear 10 and the second synchronous gear 11. The synchronous toothed belt 12 meshes with both the first synchronous gear 10 and the second synchronous gear 11.

[0022] Furthermore, the fixed sleeve 4, threaded rod 5, telescopic cylinder 6, clamping plate 7, knob 9, first synchronous gear 10, second synchronous gear 11, and synchronous toothed belt 12 are all in two sets and are arranged symmetrically on the left and right. The symmetrical structure makes the force on both sides of the workpiece balanced, effectively avoiding workpiece tilting and loosening during processing and improving clamping stability.

[0023] Furthermore, the lifting assembly includes a first servo motor 19 and a lead screw 20. The first servo motor 19 is fixedly installed on the top outer wall of the housing 13, and the lead screw 20 is rotatably installed on the top of the housing 13. The bottom thread of the telescopic rod 14 is threaded onto the outer wall of the lead screw 20. The output shaft of the first servo motor 19 is fixedly installed on the top end of the lead screw 20. The lead screw has high transmission accuracy and smooth operation, and can accurately control the feed depth and speed of the tap to meet the processing requirements of threaded holes of different specifications.

[0024] Furthermore, the linkage assembly includes a hollow rod 21, a first gear 22, and a second gear 23. The hollow rod 21 is rotatably mounted on the bottom of the housing 13. The first gear 22 is fixedly mounted on the outer wall of the hollow rod 21, and the second gear 23 is fixedly mounted on the outer wall of the lead screw 20. The second gear 23 meshes with the first gear 22. The top end of the rotating shaft 16 is slidably mounted on the inner side of the hollow rod 21. The hollow rod and the rotating shaft adopt a sliding fit, which ensures synchronous rotational power transmission and does not interfere with the vertical lifting and lowering movement of the tap, thereby realizing the coordinated action of tapping feed and rotation.

[0025] Furthermore, the positioning assembly includes a movable rod 24, a cone head 25, a push rod 26, and a return spring 27. The movable rod 24 is slidably mounted on the connecting plate 15, the cone head 25 is fixedly mounted on the bottom end of the movable rod 24, the push rod 26 is fixedly mounted on the front side of the movable rod 24, and the return spring 27 is sleeved on the movable rod 24. The cone head 25 and the tap 18 are symmetrically arranged on the left and right sides below the machine housing 13. The cone head adopts a conical structure, which can be quickly inserted into the pre-drilled hole of the workpiece to achieve automatic centering, with small positioning error and convenient and efficient operation.

[0026] Furthermore, the movable components include a first guide rod 28, a second guide rod 29, and a slider 30. The inner walls on both sides of the fixed platform 2 are provided with first sliding grooves, and the inner walls on the front and rear sides of the fixed platform 2 are provided with second sliding grooves. The first guide rod 28 is slidably installed in the first sliding groove, and the second guide rod 29 is slidably installed in the second sliding groove. The first guide rod 28 and the second guide rod 29 are arranged perpendicularly and alternately. The slider 30 is slidably installed on the first guide rod 28 and the second guide rod 29. The top of the slider 30 is fixedly installed on the bottom of the hollow platform 3. The bidirectional vertical guide structure enables the hollow platform to be freely fine-tuned in the X and Y directions in the horizontal plane, meeting the processing requirements of holes at different positions on the workpiece.

[0027] Furthermore, a second servo motor 33 is fixedly installed on the top outer wall of the fixed bracket 1, and a first bevel gear 34 is fixedly installed on the output shaft of the second servo motor 33. A second bevel gear 35 is fixedly installed on the outer wall of the housing 13. The second bevel gear 35 meshes with the first bevel gear 34. The bevel gear transmission reverses smoothly and the torque transmission is stable, which can accurately drive the housing to rotate and switch positions, realizing the rapid conversion between positioning and tapping processes.

[0028] Furthermore, the transmission ratio between the first synchronous gear 10 and the second synchronous gear 11 is 1:1, the transmission ratio between the first gear 22 and the second gear 23 is 1:1, and the transmission ratio between the first bevel gear 34 and the second bevel gear 35 is 10:1. The reasonable transmission ratio design ensures that the movement speed of each component is matched, the action is coordinated and smooth, and the reliability of the device operation is improved.

[0029] Furthermore, the top and bottom of the hollow table 3 are threaded with fixing bolts 31, and one end of the fixing bolts 31 contacts the top of the fixing table 2. The fixing bolts can quickly lock the hollow table, and there is no displacement after positioning, which ensures that the workpiece position is fixed during the tapping process and ensures the thread processing accuracy.

[0030] Working principle: Place the workpiece to be processed on top of the hollow table 3. Rotate the knob 9 to drive the rotating rod 8 and the first synchronous gear 10 to rotate. The synchronous gear belt 12 drives the second synchronous gear 11 and the threaded rod 5 to rotate synchronously, causing the telescopic cylinder 6 to push the clamping plate 7 to move. The two sets of symmetrical clamping structures clamp the workpiece synchronously, ensuring stable clamping and uniform force. Push the hollow table 3 so that it can make bidirectional fine adjustments in the plane along the first guide rod 28 and the second guide rod 29 via the slider 30, moving the pre-drilled hole of the workpiece directly below the cone head 25. Push the push rod 26 downward to drive the movable rod 24 and the cone head 25 to descend, so that the cone head 25 is inserted into the pre-drilled hole to achieve coaxial alignment. Tighten the fixing bolt 31 to lock the hollow table. 3. After releasing the push rod 26, the return spring 27 drives the tap 25 to automatically return to its original position. The second servo motor 33 is started through the control panel 32. Its output shaft drives the first bevel gear 34 to rotate, which in turn drives the second bevel gear 35 to rotate 180° with the machine housing 13, precisely switching the tap 18 to the top of the pre-drilled hole on the workpiece. The first servo motor 19 is started, driving the lead screw 20 to rotate. On one hand, it drives the telescopic rod 14, the connecting plate 15, and the tap 18 to descend vertically. On the other hand, through the second gear 23 meshing with the first gear 22, it drives the hollow rod 21, the rotating shaft 16, and the tap 18 to rotate synchronously. The descent and rotation are linked to complete the automatic tapping operation of the pre-drilled hole on the workpiece.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A tapping device for an exhaust fan motor bracket, comprising a fixed bracket (1), a fixed platform (2) fixedly mounted on the rear side of the fixed bracket (1), a hollow platform (3) provided on the top of the fixed platform (2), a housing (13) rotatably mounted on the top of the fixed bracket (1), a telescopic rod (14) slidably mounted on the bottom of the housing (13), a connecting plate (15) fixedly mounted on the bottom of the telescopic rod (14), a rotating shaft (16) rotatably mounted on the connecting plate (15), a chuck (17) fixedly mounted on the bottom end of the rotating shaft (16), a tap (18) clamped in the chuck (17), and a control panel (32) fixedly mounted on the front outer wall of the fixed platform (2), characterized in that, Also includes: The clamping assembly is installed on the hollow table (3) and is used to clamp and fix the workpiece. The lifting assembly installed on the chassis (13) and the telescopic rod (14) is used to drive the telescopic rod (14), the connecting plate (15), the rotating shaft (16), the chuck (17), and the tap (18) to rise and fall; The linkage assembly installed on the chassis (13), the rotating shaft (16), and the lifting assembly, through the cooperation of the chassis (13), the rotating shaft (16), the lifting assembly, and the linkage assembly, is used to drive the rotating shaft (16), the chuck (17), and the tap (18) to rotate; The positioning component installed on the connecting plate (15) and the movable component installed between the fixed bracket (1) and the hollow table (3) are used to position the workpiece through the cooperation of the positioning component and the movable component.

2. The tapping device for an exhaust fan motor bracket according to claim 1, characterized in that: The clamping assembly includes a fixed sleeve (4), a threaded rod (5), a telescopic cylinder (6), a clamping plate (7), a rotating rod (8), a knob (9), a first synchronous gear (10), a second synchronous gear (11), and a synchronous toothed belt (12). The fixed sleeve (4) is fixedly installed on one side of the outer wall of the hollow platform (3), the threaded rod (5) is rotatably installed on one side of the hollow platform (3), the telescopic cylinder (6) is slidably installed on the inner side of the fixed sleeve (4), and the clamping plate (7) is fixedly installed on one side of the telescopic cylinder (6). The other side of the telescopic cylinder (6) is... The side thread is installed on the outer wall of the threaded rod (5), the rotating rod (8) is rotatably installed on both sides of the hollow platform (3), the knob (9) is fixedly installed on one end of the rotating rod (8), the first synchronous gear (10) is fixedly installed on the outer wall of the rotating rod (8), the second synchronous gear (11) is fixedly installed on the outer wall of the threaded rod (5), and the synchronous toothed belt (12) is sleeved on the first synchronous gear (10) and the second synchronous gear (11). The synchronous toothed belt (12) meshes with the first synchronous gear (10) and the second synchronous gear (11).

3. The tapping device for an exhaust fan motor bracket according to claim 2, characterized in that: The fixed sleeve (4), threaded rod (5), telescopic cylinder (6), clamp (7), knob (9), first synchronous gear (10), second synchronous gear (11), and synchronous toothed belt (12) are all in two sets and are arranged symmetrically on the left and right.

4. A tapping device for an exhaust fan motor bracket according to claim 3, characterized in that: The lifting assembly includes a first servo motor (19) and a lead screw (20). The first servo motor (19) is fixedly installed on the top outer wall of the housing (13), the lead screw (20) is rotatably installed on the top of the housing (13), the bottom of the telescopic rod (14) is threaded onto the outer wall of the lead screw (20), and the output shaft of the first servo motor (19) is fixedly installed on the top of the lead screw (20).

5. A tapping device for an exhaust fan motor bracket according to claim 4, characterized in that: The linkage assembly includes a hollow rod (21), a first gear (22), and a second gear (23). The hollow rod (21) is rotatably mounted on the bottom of the housing (13). The first gear (22) is fixedly mounted on the outer wall of the hollow rod (21). The second gear (23) is fixedly mounted on the outer wall of the lead screw (20). The second gear (23) meshes with the first gear (22). The top end of the rotating shaft (16) is slidably mounted on the inner side of the hollow rod (21).

6. A tapping device for an exhaust fan motor bracket according to claim 5, characterized in that: The positioning assembly includes a movable rod (24), a cone (25), a push rod (26), and a return spring (27). The movable rod (24) is slidably mounted on the connecting plate (15), the cone (25) is fixedly mounted on the bottom end of the movable rod (24), the push rod (26) is fixedly mounted on the front side of the movable rod (24), and the return spring (27) is sleeved on the movable rod (24). The cone (25) and the tap (18) are symmetrically arranged on the left and right sides below the housing (13).

7. A tapping device for an exhaust fan motor bracket according to claim 6, characterized in that: The active components include a first guide rod (28), a second guide rod (29), and a slider (30). The inner walls on both sides of the fixed platform (2) are provided with a first sliding groove, and the inner walls on the front and rear sides of the fixed platform (2) are provided with a second sliding groove. The first guide rod (28) is slidably installed in the first sliding groove, and the second guide rod (29) is slidably installed in the second sliding groove. The first guide rod (28) and the second guide rod (29) are arranged perpendicularly and alternately. The slider (30) is slidably installed on the first guide rod (28) and the second guide rod (29). The top of the slider (30) is fixedly installed on the bottom of the hollow platform (3).

8. A tapping device for an exhaust fan motor bracket according to claim 7, characterized in that: The top outer wall of the fixed bracket (1) is fixedly installed with a second servo motor (33), the output shaft of the second servo motor (33) is fixedly installed with a first bevel gear (34), the outer wall of the chassis (13) is fixedly installed with a second bevel gear (35), and the second bevel gear (35) meshes with the first bevel gear (34).

9. A tapping device for an exhaust fan motor bracket according to claim 8, characterized in that: The transmission ratio between the first synchronous gear (10) and the second synchronous gear (11) is 1:1, the transmission ratio between the first gear (22) and the second gear (23) is 1:1, and the transmission ratio between the first bevel gear (34) and the second bevel gear (35) is 10:

1.

10. A tapping device for an exhaust fan motor bracket according to claim 9, characterized in that: The top and bottom of the hollow platform (3) are threaded with fixing bolts (31), and one end of the fixing bolts (31) is in contact with the top of the fixed platform (2).

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