A suction type nursing machine motor

Abstract

The present invention discloses a suction type nursing machine motor, comprising a silent shell, a motor bracket arranged inside the silent shell, an auxiliary noise reduction mechanism and a transmission dust reduction mechanism respectively arranged on both sides of the motor bracket, a front end cover and a rear end cover are respectively installed at both ends of the silent shell, the position of the front end cover corresponds to the transmission dust reduction mechanism, the transmission dust reduction mechanism is installed inside the front end cover, the transmission dust reduction mechanism is used for dust adsorption during transmission, the auxiliary noise reduction mechanism is arranged on the inner wall of the rear end cover, and the auxiliary noise reduction mechanism is used for airflow guidance and sound insulation; compared with the prior art, the present invention can screen with the help of multiple grid plates on the limit ring during the exhaust and odor removal process, can quickly adsorb debris and fluff in the airflow to prevent it from entering the silent shell, the airflow can enter along one side of the connecting pipe, and the airflow that can enter the silent shell can be screened twice to reduce dust and fluff therein.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a suction type nursing machine motor. Background Art

[0002] A clothing care machine is an emerging household appliance that integrates multiple functions. It mainly provides comprehensive care and maintenance for clothing. It is an appliance that integrates functions such as sterilization, deodorization, drying, wrinkle removal and dehumidification. It can provide fine care for clothing of different materials to ensure that the clothing is kept in the best condition.

[0003] Clothing care machines have high requirements on the performance of motors. The motors need to run stably to avoid excessive vibration and noise during high-speed operation. In addition, during the process of clothing care, drying and deodorization, the internal conveying medium often contains more dust particles. These particles collide and settle on the surface of the impeller, and the adhesion of dust is enhanced under high temperature, which further aggravates the dust accumulation. Excessive dust accumulation will increase the load of the fan and intensify the vibration of the fan. In severe cases, the bearings may be damaged. For this reason, we propose a suction care machine motor to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a suction care machine motor to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a suction nursing machine motor, comprising a silent housing, a motor bracket arranged inside the silent housing, an auxiliary noise reduction mechanism and a transmission dust reduction mechanism respectively arranged on both sides of the motor bracket, a front end cover and a rear end cover respectively installed at both ends of the silent housing, the front end cover is located at a position corresponding to the transmission dust reduction mechanism, the transmission dust reduction mechanism is installed inside the front end cover, and the transmission dust reduction mechanism is used for dust adsorption during transmission;

[0006] The auxiliary noise reduction mechanism is arranged on the inner wall of the rear end cover. The auxiliary noise reduction mechanism is used to play the role of airflow diversion and sound insulation, thereby reducing the noise generated during the use of the clothing care machine. During the use of the care motor, the auxiliary noise reduction mechanism and the transmission dust reduction mechanism can be used to separate dust and debris to prevent them from adhering to the surface of the active wind wheel. This can effectively extend the maintenance cycle of the equipment, reduce the growth of odor or bacteria inside, and prevent damage to the clothes being cared for.

[0007] Preferably, the auxiliary noise reduction mechanism includes a limiting ring and a connecting pipe, the limiting ring is provided with a plurality of arc grooves inside, and a plurality of grid plates are provided inside the arc grooves, a transmission groove is provided on the surface of the rear end cover, and the position of the transmission groove corresponds to the arc groove, a plurality of positioning plates are installed on the limiting ring, the positioning plates are bent, the connecting pipes are clamped on the top of the positioning plates, the connecting pipes are arranged in a uniform array on the outside of the motor bracket, the position of the connecting pipes corresponds to the arc groove, the side of the connecting pipe close to the arc groove is open to increase the air intake, and a soundproof pad is provided on the outside of the connecting pipe to reduce the noise of airflow transmission.

[0008] Preferably, the connecting tube has an arc-shaped cross-section, and a plurality of buffer shafts are installed inside the connecting tube. The buffer shafts are rectangular and uniformly arrayed inside the connecting tube. A plurality of adsorption balls are installed on the surface of the buffer shafts, and the adsorption balls are elastic and have activated carbon inside. The adsorption balls on different buffer shafts are staggered to adsorb dust in the airflow.

[0009] Preferably, the motor bracket is installed inside the silent housing, and a control motor is installed inside the motor bracket;

[0010] A transmission ring is movably provided on the control motor, and a plurality of docking shafts are provided on the outer wall of the transmission ring. The docking shafts are arranged on the transmission ring in a uniform array. A movable wind wheel is installed on the docking shaft, and a buffer pressure plate is installed on the top of the movable wind wheel. The movable wind wheel includes a guide vane and a bracket, and the guide vane is inserted on the bracket, and can be disassembled and cleaned during subsequent maintenance to reduce residual dirt.

[0011] Preferably, a temperature insulation plate is provided at one end of the control motor, an electric heating ring is provided on the outer wall of the temperature insulation plate, and a plurality of metal fins are provided on the electric heating ring, which can improve the drying efficiency.

[0012] Preferably, the transmission and dust reduction mechanism includes a guide plate and a rotating plate, the guide plate is installed on the inner wall of the front end cover, the guide plate is frustum-shaped and hollow, the guide plate and the grid plate on the front end cover are concentrically arranged, a plurality of adsorption shafts are arranged on the side of the guide plate close to the front end cover, a positioning ring is provided on the inner wall of the guide plate, the rotating plate is rotatably arranged on the positioning ring, the guide plate is provided with a circular groove, and an air inlet plate is installed inside the circular groove, and the position of the air inlet plate corresponds to the rotating plate.

[0013] Preferably, an air inlet slot is provided on one side of the rotating disk close to the air inlet plate, a plurality of transmission blades are provided inside the air inlet slot, the transmission blades are arc-shaped and evenly arranged in an array inside the air inlet slot, a plurality of guide slots are provided inside the air inlet slot, and an elastic sheet is provided to guide the air to the top.

[0014] Preferably, a plurality of fixed shafts are installed on the outer wall of the rotating disk, the fixed shaft is in a "V" shape, a transmission rod is movably provided inside the fixed shaft, the transmission rod is in a "U" shape, a clamping ring is installed on the top of the fixed shaft, the transmission rod is installed on the top of the elastic sheet and a positioning ring passes through the top, a compression ball is installed on the top of the transmission rod, a compression ring is installed on the guide disk, and the position of the compression ring corresponds to the compression ball.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the process of exhaust gas deodorization, the present invention can use multiple grid plates on the limiting ring for screening, and can quickly absorb debris and fluff in the airflow to prevent it from entering the silent housing. The airflow can enter along one side of the connecting pipe, and the airflow entering the silent housing can be screened twice to reduce dust and fluff in it;

[0017] 2. When the present invention needs to evacuate the interior of the nursing machine to reduce odor or discharge water vapor, the control motor can be rotated forward, and as the movable wind wheel rotates, the air inside the nursing machine can be quickly evacuated, which can effectively remove odor and discharge water vapor;

[0018] 3. When the airflow is discharged through the guide plate, part of the airflow can enter the air inlet slot along the inlet plate, so that the rotating plate can rotate. Under the action of the airflow, the elastic sheet can be pushed to deform, so that the compression ball and the compression ring can be squeezed and rubbed, and the buffer shaft against the compression ring can be pushed to deform, so that the adsorption balls can be squeezed, and dust and debris can be rubbed and adsorbed, so as to prevent the debris from flying with the airflow after the power is increased;

[0019] 4. The present invention can compress the adsorption shaft by the movement of the compression ball, so that the adsorption shaft can be slightly twisted, which can further enhance the dust collection effect of the adsorption shaft and facilitate subsequent unified cleaning and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the split structure of the silent housing of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the auxiliary noise reduction mechanism of the present invention;

[0023] Figure 4 It is a schematic diagram of a partial cross-sectional structure of the connecting pipe of the present invention;

[0024] Figure 5 This is a schematic diagram of the split structure of the motor bracket of the present invention;

[0025] Figure 6 This is a schematic diagram of the internal structure of the transmission dust reduction mechanism of the present invention;

[0026] Figure 7 For the present invention Figure 6 A partial enlarged schematic diagram in the middle;

[0027] Figure 8 This is a schematic diagram of the rear end structure of the transmission dust reduction mechanism of the present invention;

[0028] In the figure: 1. Silent shell; 2. Auxiliary noise reduction mechanism; 3. Motor bracket; 4. Transmission dust reduction mechanism; 11. Rear cover; 12. Front cover; 21. Limiting ring; 22. Positioning plate; 23. Connecting pipe; 24. Buffer shaft; 241. Adsorption ball; 31. Movable wind wheel; 32. Buffer pressure plate; 33. Control motor; 34. Transmission ring; 341. Docking shaft; 35. Insulation plate; 36. Electric heating ring; 41. Guide plate; 411. Compression ring; 42. Adsorption shaft; 43. Air inlet plate; 44. Positioning ring; 45. Rotating disk; 451. Elastic sheet; 46. Fixed shaft; 47. Snap ring; 48. Compression ball; 481. Transmission rod; 49. Air inlet slot; 491. Transmission fan blade. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 8 The present invention provides a technical solution: a suction nursing machine motor, comprising a silent shell 1, a motor bracket 3 arranged inside the silent shell 1, an auxiliary noise reduction mechanism 2 and a transmission dust reduction mechanism 4 respectively arranged on both sides of the motor bracket 3, a front end cover 12 and a rear end cover 11 are respectively installed at both ends of the silent shell 1, the front end cover 12 is located corresponding to the transmission dust reduction mechanism 4, the transmission dust reduction mechanism 4 is installed inside the front end cover 12, and the transmission dust reduction mechanism 4 is used for dust adsorption during the transmission process;

[0031] The auxiliary noise reduction mechanism 2 is arranged on the inner wall of the rear end cover 11. The auxiliary noise reduction mechanism 2 is used to play the role of air flow guidance and sound insulation, so as to reduce the noise generated during the use of the clothing care machine. During the transmission process, it can be screened with the help of multiple grid plates on the limit ring 21, and can quickly adsorb debris and fluff in the airflow to prevent it from entering the interior of the silent shell 1. The airflow can enter along one side of the connecting pipe 23, and the airflow that can enter the interior of the silent shell 1 can be screened for the second time to reduce the dust and fluff therein, and the compression ball 48 can be moved under the action of the airflow to squeeze it and squeeze the adsorption shaft 42, so that the adsorption shaft 42 can be slightly twisted, which can further enhance the dust absorption effect of the adsorption shaft 42, and facilitate subsequent unified cleaning and maintenance. During the use of the care motor, the dust and debris can be separated with the help of the auxiliary noise reduction mechanism 2 and the transmission dust reduction mechanism 4 to prevent them from adhering to the surface of the active wind wheel 31, which can effectively extend the maintenance cycle of the equipment, and can also reduce the situation of odor or bacterial growth inside, and prevent damage to the care clothes.

[0032] like Figure 3 As shown, during the operation of the motor, the small parts inside will shake due to the action of the airflow, thereby generating noise. The auxiliary noise reduction mechanism 2 includes a limit ring 21 and a connecting pipe 23. The limit ring 21 is provided with a plurality of arc grooves, and the arc grooves are provided with a plurality of grid plates. A transmission groove is provided on the surface of the rear end cover 11, and the position of the transmission groove corresponds to the arc groove. The limit ring 21 is provided with a plurality of positioning plates 22, and the positioning plates 22 are bent. The connecting pipe 23 is clamped on the top of the positioning plate 22. The connecting pipe 23 is arranged in a uniform array on the outside of the motor bracket 3. The position of the connecting pipe 23 corresponds to the arc groove. The side of the connecting pipe 23 close to the arc groove is open to increase the air intake. A mute pad is provided on the outside of the connecting pipe 23 to reduce the noise of airflow transmission. The connecting pipe 23 is used to separate and reduce the airflow entering the silent housing 1. It can not only reduce the speed of the airflow, but also prevent the internal parts from vibrating and generating noise. In addition, the connecting pipe 23 can be further dusted to prevent dust and fluff from accumulating on the active wind wheel 31.

[0033] like Figure 4As shown, in order to remove odors, the connecting tube 23 has an arc-shaped cross-section, and a plurality of buffer shafts 24 are installed inside the connecting tube 23. The buffer shafts 24 are rectangular and are evenly arrayed inside the connecting tube 23. A plurality of adsorption balls 241 are installed on the surface of the buffer shafts 24. The adsorption balls 241 are elastic and have activated carbon inside. The adsorption balls 241 on different buffer shafts 24 are staggered to adsorb dust in the airflow, and can absorb odors with the help of the activated carbon inside. The buffer shafts 24 can squeeze and rub the adsorption balls 241 against each other during their movement, compress dust, etc., prevent internal blockages from causing poor airflow, and extend the maintenance cycle of the equipment.

[0034] like Figure 5 As shown, in order to facilitate subsequent maintenance, the motor bracket 3 is installed inside the silent housing 1, and a control motor 33 is installed inside the motor bracket 3;

[0035] A transmission ring 34 is movably provided on the control motor 33, and a plurality of docking shafts 341 are provided on the outer wall of the transmission ring 34. The docking shafts 341 are arranged on the transmission ring 34 in a uniform array. A movable wind wheel 31 is installed on the docking shaft 341, and a buffer pressure plate 32 is installed on the top of the movable wind wheel 31. The movable wind wheel 31 includes a guide vane and a bracket, and the guide vane is inserted on the bracket, which can be disassembled and cleaned during subsequent maintenance to reduce residual dirt, and the buffer pressure plate 32 can play an auxiliary positioning role to avoid offset during the installation process that affects the efficiency of the movable wind wheel 31, and can be positioned and calibrated with the help of the buffer pressure plate 32.

[0036] In order to enhance the drying efficiency of the equipment, a temperature insulation plate 35 is provided at one end of the control motor 33, and an electric heating ring 36 is provided on the outer wall of the temperature insulation plate 35. The electric heating ring 36 is provided with multiple metal fins, which can improve the drying efficiency, and the metal fins can play a role in rapid heating.

[0037] like Figure 6As shown, in order to reduce the amount of dust brought into the equipment by external air, the transmission and dust reduction mechanism 4 includes a guide plate 41 and a rotating plate 45. The guide plate 41 is installed on the inner wall of the front cover 12. The guide plate 41 is truncated cone-shaped and hollow. The guide plate 41 and the grid plate on the front cover 12 are concentrically arranged. A plurality of adsorption shafts 42 are provided on the side of the guide plate 41 close to the front cover 12. A positioning ring 44 is provided on the inner wall of the guide plate 41. The rotating plate 45 is rotatably arranged on the positioning ring 44. A circular groove is provided on the guide plate 41, and an air inlet plate 43 is installed inside the circular groove. The position of the air inlet plate 43 corresponds to the rotating plate 45. When the clothes need to be dried quickly, the electric heating ring 36 can be started to operate, and the motor 33 can be controlled to reverse at the same time, so that the external air can be transported to the inside of the nursing machine. When the airflow enters the interior of the silent shell 1, the dust and debris can be quickly screened out with the help of the adsorption shaft 42 to prevent them from being adsorbed on the surface of the movable wind wheel 31, which can block the dust.

[0038] like Figure 8 As shown, in order to enhance the dust removal efficiency of the equipment, an air inlet slot 49 is provided on one side of the rotating disk 45 close to the air inlet plate 43, and a plurality of transmission blades 491 are provided inside the air inlet slot 49. The transmission blades 491 are arc-shaped and evenly arranged in an array inside the air inlet slot 49. A plurality of guide slots are provided inside the air inlet slot 49, and an elastic sheet 451 is provided at the top to guide the air. Part of the airflow can enter the air inlet slot 49 along the entry plate 43, which can make the rotating disk 45 rotate and at the same time push the elastic sheet 451 to move, and can also rub against the compression shaft 42, causing the adsorption shaft 42 to twist slightly, which can further enhance the dust collection effect of the adsorption shaft 42 and facilitate subsequent unified cleaning and maintenance.

[0039] like Figure 7 As shown, in order to reduce the impact of dust accumulation inside the equipment on the transmission efficiency, a plurality of fixed shafts 46 are installed on the outer wall of the rotating disk 45, and the fixed shaft 46 is in a "V" shape. A transmission rod 481 is movably arranged inside the fixed shaft 46, and the transmission rod 481 is in a "U" shape. A clamping ring 47 is installed on the top of the fixed shaft 46, and the transmission rod 481 is installed on the top of the elastic sheet 451 and the top passes through the positioning ring 44. A compression ball 48 is installed on the top of the transmission rod 481, and a compression ring 411 is installed on the guide plate 41. The position of the compression ring 411 corresponds to the compression ball 48. Under the action of the airflow, the elastic sheet 451 can be pushed to deform, and the transmission rod 481 can drive the compression ball 48 to deform, so that it and the compression ring 411 are squeezed and rubbed, and the buffer shaft 24 against the compression ring 411 can be deformed, and the adsorption balls 241 can be squeezed, and dust and debris can be rubbed and adsorbed to prevent the debris from flying with the airflow after the power is increased. It can reduce the dust blockage inside and affect the airflow transmission efficiency inside the equipment.

[0040] Working principle: First, during the use of the nursing motor, the auxiliary noise reduction mechanism 2 and the transmission dust reduction mechanism 4 can be used to separate dust and debris to prevent them from adhering to the surface of the active wind wheel 31, which can effectively extend the maintenance period of the equipment, reduce the growth of odor or bacteria inside, and prevent damage to the nursing clothes. When it is necessary to evacuate the inside of the nursing machine to reduce odor or discharge water vapor, the control motor 33 can be rotated forward. As the active wind wheel 31 rotates, the air inside the nursing machine can be quickly extracted, which can effectively remove odor and discharge water vapor. In the transmission process, the plurality of grid plates on the limit ring 21 can be used for screening, and the debris and fluff in the airflow can be quickly adsorbed to prevent them from entering the silent shell 1. The airflow can enter along one side of the connecting pipe 23, and the airflow entering the silent shell 1 can be screened for the second time to reduce the dust and fluff therein.

[0041] Then, when the airflow is discharged through the guide plate 41, part of the airflow can enter the air inlet slot 49 along the inlet plate 43, so that the rotating plate 45 can rotate, and under the action of the airflow, the elastic sheet 451 can be pushed to deform, so that the transmission rod 481 can drive the compression ball 48 to deform, so that it and the compression ring 411 are squeezed and rubbed, so that the buffer shaft 24 against the compression ring 411 can be deformed, so that the adsorption balls 241 can be squeezed, and dust and debris can be rubbed and adsorbed to prevent the debris from flying with the airflow after the power is increased, and as the compression ball 48 moves, it can be squeezed between the adsorption shaft 42, so that the adsorption shaft 42 can be slightly twisted, which can further enhance the dust collection effect of the adsorption shaft 42, and facilitate subsequent unified cleaning and maintenance;

[0042] Finally, when the clothes need to be dried quickly, the electric heating ring 36 can be started to operate, and the motor 33 can be controlled to reverse, so that the outside air can be transported into the care machine. When the airflow enters the silent shell 1, the dust and debris can be quickly screened out with the help of the adsorption shaft 42 to prevent them from being adsorbed on the surface of the movable wind wheel 31.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A suction nursing machine motor, comprising a silent housing (1), a motor bracket (3) arranged inside the silent housing (1), and an auxiliary noise reduction mechanism (2) and a transmission dust reduction mechanism (4) respectively arranged on both sides of the motor bracket (3), characterized in that: The two ends of the silent housing (1) are respectively mounted with a front cover (12) and a rear cover (11); the position of the front cover (12) corresponds to the transmission dust reduction mechanism (4); the transmission dust reduction mechanism (4) is mounted inside the front cover (12); and the transmission dust reduction mechanism (4) is used for dust absorption during the transmission process; The transmission dust reduction mechanism (4) comprises a guide plate (41) and a rotating plate (45); the guide plate (41) is mounted on the inner wall of the front end cover (12); the guide plate (41) is truncated and hollow; the guide plate (41) and the grid plate on the front end cover (12) are arranged concentrically; a plurality of adsorption shafts (42) are arranged on a side of the guide plate (41) close to the front end cover (12); a positioning ring (44) is arranged on the inner wall of the guide plate (41); the rotating plate (45) is rotatably arranged on the positioning ring (44); a circular groove is arranged on the guide plate (41), and an air inlet plate (43) is installed inside the circular groove; the position of the air inlet plate (43) corresponds to that of the rotating plate (45); The auxiliary noise reduction mechanism (2) is arranged on the inner wall of the rear end cover (11), and the auxiliary noise reduction mechanism (2) is used to play the role of airflow diversion and sound insulation, thereby reducing the noise generated during the use of the clothing care machine; The auxiliary noise reduction mechanism (2) comprises a limit ring (21) and a connecting pipe (23), wherein a plurality of arc grooves are provided inside the limit ring (21), and a plurality of grid plates are provided inside the arc grooves, a transmission groove is provided on the surface of the rear end cover (11), and the position of the transmission groove corresponds to the arc groove, a plurality of positioning plates (22) are mounted on the limit ring (21), and the positioning plates (22) are bent, and the connecting pipe (23) is clamped on the top of the positioning plate (22), and the connecting pipe (23) is arranged in a uniform array on the outside of the motor bracket (3), and the position of the connecting pipe (23) corresponds to the arc groove, and the side of the connecting pipe (23) close to the arc groove is open to increase the air intake, and a mute pad is provided on the outside of the connecting pipe (23) to reduce the noise of air flow transmission.

2. The suction nursing machine motor according to claim 1, characterized in that: The connecting tube (23) has an arc-shaped cross section. A plurality of buffer shafts (24) are installed inside the connecting tube (23). The buffer shafts (24) are rectangular and are evenly arranged in an array inside the connecting tube (23). A plurality of adsorption balls (241) are installed on the surface of the buffer shaft (24). The adsorption balls (241) are elastic and have activated carbon inside. The adsorption balls (241) on different buffer shafts (24) are arranged in a staggered manner to adsorb dust in an airflow.

3. The suction nursing machine motor according to claim 1, characterized in that: The motor bracket (3) is installed inside the silent housing (1), and a control motor (33) is installed inside the motor bracket (3); A transmission ring (34) is movably provided on the control motor (33); a plurality of docking shafts (341) are provided on the outer wall of the transmission ring (34); the docking shafts (341) are arranged on the transmission ring (34) in a uniform array; a movable wind wheel (31) is mounted on the docking shaft (341); a buffer pressure plate (32) is mounted on the top of the movable wind wheel (31); the movable wind wheel (31) comprises a guide vane and a bracket; the guide vane is inserted into the bracket and can be disassembled and cleaned during subsequent maintenance to reduce residual dirt.

4. The suction nursing machine motor according to claim 3, characterized in that: A temperature insulation plate (35) is provided at one end of the control motor (33), an electric heating ring (36) is provided on the outer wall of the temperature insulation plate (35), and a plurality of metal fins are provided on the electric heating ring (36), thereby improving drying efficiency.

5. The suction nursing machine motor according to claim 1, characterized in that: An air inlet slot (49) is provided on one side of the rotating disk (45) close to the air inlet plate (43); a plurality of transmission blades (491) are provided inside the air inlet slot (49); the transmission blades (491) are arc-shaped and are evenly arranged in an array inside the air inlet slot (49); a plurality of guide slots are provided inside the air inlet slot (49), and an elastic sheet (451) is provided at the top of the guide slot.

6. The suction nursing machine motor according to claim 5, characterized in that: A plurality of fixed shafts (46) are mounted on the outer wall of the rotating disk (45), the fixed shafts (46) being in a "V" shape, a transmission rod (481) being movably arranged inside the fixed shaft (46), the transmission rod (481) being in a "U" shape, a clamping ring (47) being mounted on the top of the fixed shaft (46), the transmission rod (481) being mounted on the top of the elastic sheet (451) and the top of the transmission rod (481) passing through the positioning ring (44), a compression ball (48) being mounted on the top of the transmission rod (481), and a compression ring (411) being mounted on the guide disk (41), the position of the compression ring (411) corresponding to the compression ball (48).

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