Electric motor and electric egg beater

Abstract

The utility model belongs to energy -conserving motor and small household electrical appliances field, and relates to motor and electric eggbeater, solve electric eggbeater stirring flour, will suck the dust into the motor installation shell, lead to internal accumulation too much flour, easy to appear mouldy condition, and motor just starts work and drives the rotation of the cooling fan, will increase the load of motor, not enough energy -conserving, the utility model motor rotating shaft starts after a period of time, only then drive piston push rod moves to the friction block side with the clutch starting mechanism, only then the friction block is connected with the cooling fan to drive the rotation of the cooling fan, realized the delay start of cooling fan, such electric eggbeater in just starting and stirring flour, will not produce the heat dissipation airflow in the eggbeater shell, also will not suck the dust into the eggbeater shell, avoid the appearance of mould or influence the performance of motor.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of energy-saving motors and small household appliances. BACKGROUND

[0002] The electric egg beater is a common baking tool, which can beat the egg white and yolk into smooth egg liquid, providing convenience for making cakes, cookies and other desserts. The electric egg beater is mainly driven by a motor. The motor will heat up and cause the motor to malfunction after a long time of work. Therefore, a heat dissipation channel is generally arranged on the front and rear sides of the motor installation shell, and a heat dissipation fan is arranged to form a heat dissipation airflow to dissipate heat for the motor. The heat dissipation fan is usually connected with the motor shaft and is synchronously driven to rotate by the motor. However, the existing high-power electric egg beater can not only beat the egg liquid, but also can mix the egg liquid or other liquid with flour to form a dough. When the electric egg beater starts to work, the flour has not been completely mixed with the egg liquid or other liquid, and a large amount of dust will be raised during stirring and be sucked into the motor installation shell along with the heat dissipation airflow, causing too much flour to accumulate inside the electric egg beater. Not only is it easy to cause mold and other problems, but the dust can also enter the motor and affect the performance of the motor. In addition, the motor generally heats up and gradually warms up after a period of work. If the heat dissipation fan is rotated at the beginning of work, it will increase the load of the motor, causing energy waste and being not energy-saving. SUMMARY

[0003] Therefore, the present application provides a motor and an electric egg beater, which can delay the start of the heat dissipation fan to avoid the electric egg beater sucking in dust, causing mold and affecting the performance of the motor.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solutions.

[0005] The motor comprises a motor shaft and a heat dissipation fan for heat dissipation of the motor, and further comprises a clutch mechanism and a clutch starting mechanism. The clutch mechanism comprises a connecting shaft, a piston push rod, a friction block and a clutch reset spring. The connecting shaft is coaxially connected to the motor shaft and rotates with the motor shaft. The heat dissipation fan is sleeved on the connecting shaft and can rotate around the connecting shaft. A push rod installation cavity is formed in the connecting shaft. An insertion port is formed in the side wall of the connecting shaft and communicates with the push rod installation cavity. The inner surface of the heat dissipation fan is opposite to the insertion port. The friction block is installed in the insertion port and can move along the radial direction of the connecting shaft. The side of the friction block facing inwards is provided with a wedge surface. The piston push rod is axially arranged in the push rod installation cavity of the connecting shaft and can move along the direction of the shaft of the connecting shaft. The end of the piston push rod contacts the wedge surface of the friction block. The clutch reset spring is sleeved on the piston push rod and is used for resetting the piston push rod. The clutch starting mechanism can drive the piston push rod to move to the side of the friction block in a delayed manner to open the heat dissipation fan in a delayed manner.

[0006] After the motor shaft has been running for a period of time, the clutch starting mechanism drives the piston push rod to move towards the friction block side. Only then does the friction block connect with the cooling fan to drive its rotation, achieving a delayed start for the cooling fan. This prevents the electric mixer from generating cooling airflow inside the mixer casing when it first starts and begins mixing flour, thus preventing dust from being sucked into the casing and avoiding mold growth or affecting motor performance. Simultaneously, the delayed start of the cooling fan reduces the load on the motor, achieving energy savings.

[0007] Based on technical solution 1, a braking mechanism is also included. The braking mechanism is configured on one side of the cooling fan and can brake the cooling fan before the clutch mechanism is activated, so as to prevent the cooling fan from starting prematurely.

[0008] Based on technical solution 2, the braking mechanism includes a brake outer cylinder, a brake pin, and a brake spring. The brake outer cylinder is fitted onto the connecting shaft and fixed. The brake pin is connected to the cooling fan and can move along the radius of the cooling fan. The brake spring is located between the brake pin and the cooling fan. The brake spring presses the brake pin against the surface of the brake outer cylinder to generate braking friction.

[0009] Based on technical solution 3, the contact surface between the brake outer cylinder and the brake pin is provided with friction protrusions to increase braking friction.

[0010] Based on technical solution 1, the clutch starting mechanism includes a gear pump, a transmission gear pair, and an annular air passage. The connecting shaft has an air inlet and an exhaust port that communicate with the push rod mounting cavity. The annular air passage is fitted onto the connecting shaft and communicates with the air inlet. The annular air passage has an air passage inlet. The gear pump is installed on one side of the annular air passage. The gear pump has an air pump inlet and an air pump outlet. The air pump inlet communicates with the air passage inlet of the annular air passage. The connecting shaft is connected to the gear pump via the transmission gear pair and can drive the gear pump to charge air into the push rod mounting cavity.

[0011] Based on technical solution 5, the transmission gear pair includes a driving gear, a driven gear, and a transmission shaft. The driving gear is mounted on the connecting shaft and rotates with it. The driven gear meshes with the driving gear and is mounted on the transmission shaft, allowing it to move along the shaft's axis. The transmission shaft can drive the gear pump to start. The gear pump also includes a one-way valve, installed at the air inlet and opening when the pump starts. The connecting shaft also includes a vent valve and a valve return spring. The vent valve is movably mounted at the shaft's exhaust port. A spring is installed between the exhaust port of the rotating shaft and the vent valve. The vent valve can close the exhaust port of the rotating shaft when the rotating shaft is rotated. The clutch starting mechanism also includes a clutch cylinder and a gear return spring. The clutch cylinder and the gear return spring are located on both sides of the driven wheel. The gear return spring is fitted onto the drive shaft and contacts the driven wheel. The clutch cylinder is provided with a cylinder inlet and a cylinder piston rod. The cylinder inlet is connected to the air outlet of the gear pump. The cylinder piston rod can extend out of the clutch cylinder to squeeze the driven wheel away from the driving wheel when the clutch mechanism is started.

[0012] Based on technical solution 6, the drive shaft and the driven wheel are connected by a key.

[0013] Electric egg beater, including the motor. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the electric egg beater of the present invention.

[0015] Figure 2 This is a schematic diagram of the motor of the present invention applied to an electric egg beater.

[0016] Figure 3 This is a schematic diagram of the structure in which the cooling fan and the motor shaft of the present invention are connected via a clutch mechanism.

[0017] Figure 4 for Figure 3 A cross-sectional view (with the motor shaft hidden).

[0018] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0019] Figure 6 for Figure 3 explosion Figure 1 .

[0020] Figure 7 for Figure 3 explosion Figure 2 .

[0021] The attached figures are labeled as follows:

[0022] Motor shaft 1;

[0023] Cooling fan 2, slide 21;

[0024] The clutch mechanism 3, connecting shaft 31, push rod mounting cavity 311, insertion port 312, shaft air inlet 313, shaft exhaust port 314, air release valve 315, air valve return spring 316, friction block 33, wedge surface 331, clutch return spring 34, friction block return spring 35, ball bearing 36.

[0025] Clutch starting mechanism 4, gear pump 41, air pump inlet 411, air pump outlet 412, one-way valve 413, transmission gear pair 42, driving wheel 421, driven wheel 422, transmission shaft 423, annular air passage 43, clutch cylinder 44, cylinder inlet 441, push rod return spring 442, cylinder piston rod 443, gear return spring 45;

[0026] Braking mechanism 5, brake outer cylinder 51, friction ridge 511, brake pin 52, brake spring 53. Detailed Implementation

[0027] The invention will be described in detail below with reference to specific embodiments.

[0028] like Figure 1 and Figure 2 As shown, the electric egg beater in this embodiment includes a motor, such as... Figure 3 As shown, the motor includes a motor shaft 1, a cooling fan 2, a clutch mechanism 3, and a clutch starting mechanism 4, as follows: Figure 4 As shown, the clutch mechanism 3 includes a connecting shaft 31, a piston rod 32, a friction block 33, a clutch return spring 34, and a friction block return spring 35. The connecting shaft 31 is coaxially connected to the motor shaft 1 and can rotate with the motor shaft 1. The cooling fan 2 is mounted on the end of the connecting shaft 31 away from the motor shaft 1 via a pair of ball bearings 36 and can rotate around the connecting shaft 31. Figure 4 and Figure 6 As shown, a push rod mounting cavity 311 is provided inside the connecting shaft 31. Two insertion ports 312 communicating with the push rod mounting cavity 311 are provided on the side wall of the connecting shaft 31. The two insertion ports 312 are arranged opposite to each other. The inner surface of the cooling fan 2 is opposite to the insertion ports 312. Two friction blocks 33 are provided, and one friction block 33 is installed in each insertion port 312. The friction blocks 33 can move along the radial direction of the connecting shaft 31. Figure 4 and Figure 6As shown, the friction block 33 has a wedge-shaped surface 331 on its inward side, and a trapezoidal slot is formed between the wedge-shaped surfaces 331 of the two friction blocks 33. The friction block return spring 35 connects the two friction blocks 33 to pull the friction block 33 back to its original position when the motor shaft 1 stops rotating. The piston push rod 32 is axially disposed in the push rod mounting cavity 311 and can move along the axis connecting the shaft 31. The end of the piston push rod 32 is inserted into the trapezoidal slot and contacts the wedge-shaped surface 331 of the friction block 33. The clutch return spring 34 is sleeved on the piston push rod 32 and is used to reset the piston push rod 32. The clutch starting mechanism 4 can delay driving the piston push rod 32 to move towards the friction block 33 side to delay turning on the cooling fan 2 after the motor starts. This embodiment utilizes a clutch starting mechanism 4 and a clutch mechanism 3 with a clutch function to achieve delayed start of the cooling fan 2. Specifically, when the motor starts, the connecting shaft 31 rotates with the motor shaft 1. After the motor shaft 1 has rotated for a certain period of time, the clutch starting mechanism 4 drives the piston push rod 32 to overcome the elastic force of the clutch return spring 34 and move towards the trapezoidal slot side. The end of the piston push rod 32 presses the wedge-shaped surface 331 of the two friction blocks 33. The wedge-shaped surface 331 converts part of the axial thrust of the friction block 33 into radial thrust. Therefore, the two friction blocks 33 move outward and contact and press the inner wall of the cooling fan 2. The driving friction between the friction blocks 33 and the cooling fan 2 gradually increases with the increase of the pressing force. The connecting shaft 31 can drive the cooling fan 2 to rotate via the two friction blocks 33. Since the friction block 33 connects to the cooling fan 2 only after the motor shaft 1 has been running for a period of time, the cooling fan 2 is delayed in starting. This prevents airflow from forming inside the mixer casing when the electric mixer first starts and begins mixing flour, thus preventing dust from being drawn into the casing and avoiding mold growth or affecting motor performance. Simultaneously, the delayed start of the cooling fan 2 reduces the load on the motor, achieving energy savings.

[0029] like Figure 4 As shown, the connecting shaft 31 and the cooling fan 2 are connected by a ball bearing 36. The ball bearing 36 itself has a small amount of friction. When the motor shaft 1 first starts to rotate, this friction may cause the cooling fan 2 to rotate prematurely, resulting in the cooling fan 2 starting prematurely and drawing in dust. In this embodiment, a braking mechanism 5 is used to brake the cooling fan 2 to prevent the cooling fan 2 from starting prematurely as the motor shaft 1 rotates. Specifically, as... Figure 6 and Figure 7 As shown, in this embodiment, the braking mechanism 5 is positioned on one side of the axial direction of the cooling fan 2. Four grooves 21 are formed along the circumferential direction on the shaft end face of the cooling fan 2. The braking mechanism 5 includes a brake outer cylinder 51, brake pins 52, and a brake spring 53. The brake outer cylinder 51 is fitted onto the connecting shaft 31 and fixed to the motor housing. Four brake pins 52 are provided, each corresponding to one groove 21. Figure 4The brake pin 52 is connected to the slide groove 21 of the cooling fan 2 and can move along the radius of the cooling fan 2. The brake spring 53 is set in the slide groove 21, with one end connected to the brake pin 52 and the other end connected to the cooling fan 2. The brake spring 53 is compressed and presses the brake pin 52 against the outer surface of the brake outer cylinder 51 so that there is a braking friction between the brake outer cylinder 51 and the brake pin 52. The contact surface between the brake outer cylinder 51 and the brake pin 52 is provided with friction protrusions 511 to increase the braking friction. The friction between the ball bearing 36 and the cooling fan 2 is relatively small. The braking friction between the brake pin 52 and the friction protrusion 511 is greater than the force exerted on the cooling fan 2 by the ball bearing 36. Therefore, the cooling fan 2 is braked and will not rotate with the connecting shaft 31. When the friction block 33 contacts the cooling fan 2 and is about to drive it to rotate via the driving friction force, this driving friction force is greater than the braking friction force. The cooling fan 2 overcomes the braking friction force and rotates. At the same time, the cooling fan 2 drives the brake pin 52 to rotate together. Under centrifugal force, the brake pin 52 overcomes the elastic force of the brake spring 53 and moves outward, thereby disengaging from the friction protrusion 511 and eliminating the braking force exerted on the cooling fan 2 by the braking mechanism 5. Thus, the braking mechanism 5 can prevent the cooling fan 2 from starting prematurely, and the braking mechanism 5 only acts as a brake before the cooling fan 2 starts. When the cooling fan 2 rotates with the connecting shaft 31, the braking effect is eliminated. This reduces the load on the motor to overcome the braking friction force and avoids increased energy consumption.

[0030] like Figure 5 and Figure 7 As shown, the clutch starting mechanism 4 of this embodiment includes a gear pump 41, a transmission gear pair 42, and an annular air passage 43. The connecting shaft 31 has an air inlet 313 and an air outlet 314 communicating with the push rod mounting cavity 311. The annular air passage 43 is fitted around the connecting shaft 31. When the connecting shaft 31 rotates, the annular air passage 43 does not rotate with it. The annular air passage 43 communicates with the air inlet 313 and has an air passage inlet (not shown in the figure). The gear pump 41 is installed on one side of the annular air passage 43. The gear pump 41 has an air pump inlet 411 and an air pump outlet 412. The air pump outlet 412 communicates with the air passage inlet. Figure 7As shown, the connecting shaft 31 is connected to the gear pump 41 via the transmission gear pair 42. The connecting shaft 31 rotates and drives the gear pump 41 to start via the transmission gear pair 42. The gear pump 41 draws air, which enters from the air pump inlet 411 and flows sequentially through the air pump outlet 412, the annular air passage 43 and the shaft inlet 313, and finally enters the push rod mounting cavity 311 of the connecting shaft 31, thus inflating the push rod mounting cavity 311. After the motor shaft 1 rotates for a period of time, the air pressure in the push rod mounting cavity 311 gradually increases. When the air pressure is greater than the elastic force of the clutch return spring 34 and the friction block return spring 35, the piston push rod 32 will be pushed by the air pressure and move towards the friction block 33, thereby realizing the delayed start of the clutch mechanism 3.

[0031] As the air pressure inside the push rod mounting cavity 311 gradually increases, some gas needs to be released when it exceeds the required pressure value. Therefore, this embodiment also provides a shaft exhaust port 314 on the connecting shaft 31 to facilitate exhaust. A valve can be installed on the shaft exhaust port 314 to control the air pressure inside the push rod mounting cavity 311. In addition, the clutch starting mechanism 4 is started by rotating the motor shaft 1, which avoids the need for an additional drive motor to drive the gear pump 41, simplifying the structure.

[0032] like Figure 5 As shown, when the connecting shaft 31 rotates with the motor shaft 1, it continuously drives the gear pump 41 to pump air into the push rod mounting cavity 311, causing excess gas to be discharged from the shaft exhaust port 314, increasing the motor load and consuming energy. This embodiment addresses this by adding a clutch cylinder 44, a one-way valve 413, and a vent valve 315 to the transmission gear pair 42. The clutch cylinder 44 can shut off the gear pump 41 after the clutch mechanism 3 is activated, reducing the motor load. The one-way valve 413 and vent valve 315 maintain the air pressure in the push rod mounting cavity 311, ensuring that the clutch mechanism 3 can continue to operate even after the gear pump 41 is shut off. Specifically, as... Figure 7 As shown, the transmission gear pair 42 in this embodiment includes a driving gear 421, a driven gear 422, and a transmission shaft 423. The driving gear 421 is fitted onto the connecting shaft 31 and rotates with it. The driven gear 422 meshes with the driving gear 421, allowing the driving gear 421 to drive the driven gear 422 to rotate. The transmission shaft 423 has a "T"-shaped structure and is arranged parallel to one side of the connecting shaft 31 and connected to the gear pump 41. The transmission shaft 423 can drive the gear pump 41 to rotate. The transmission shaft 423 is keyed to the driven gear 422 to ensure that the driven gear 422 can only move along the axial direction of the transmission shaft 423 and cannot rotate around it. Figure 5As shown, a one-way valve 413 is provided at the air pump inlet 411. When the gear pump 41 is charging, the one-way valve 413 opens the air pump inlet 411, and when the gear pump 41 is shut down, the one-way valve 413 closes the air pump inlet 411 to prevent gas in the push rod mounting cavity 311 from leaking out of the air pump inlet 411. The connecting shaft 31 is also provided with a vent valve 315 and a valve return spring 316. The vent valve 315 is located at the shaft exhaust port 314, and the valve return spring 316 is installed between the shaft exhaust port 314 and the vent valve 315. When the connecting shaft 31 rotates, the vent valve 315 rotates with the connecting shaft 31 and moves outward under centrifugal force, blocking the shaft exhaust port 314 to prevent air leakage from the push rod mounting cavity 311.

[0033] like Figures 5-7As shown, the clutch starting mechanism 4 in this embodiment also includes a clutch cylinder 44 and a gear return spring 45. The clutch cylinder 44 and the gear return spring 45 are respectively located on both sides of the driven wheel 422. The gear return spring 45 is fitted onto the transmission shaft 423. One end of the gear return spring 45 contacts the end of the transmission shaft 423, and the other end contacts the driven wheel 422. The clutch cylinder 44 is provided with a cylinder inlet 441, a push rod return spring 442, and a cylinder piston rod 443. The push rod return spring 442 is installed in the clutch cylinder 44 and is used to reset the cylinder piston rod 443. The cylinder inlet 441 is connected to the air outlet 412 of the gear pump 41. The cylinder piston rod 443 can extend out of the clutch cylinder 44 to squeeze the driven wheel 422 away from the driving wheel 421 after the clutch mechanism 3 drives the cooling fan 2 to start. It should be noted that the combined rigidity of the push rod return spring 442 and the gear return spring 45 is greater than that of the clutch return spring 34 and the friction block return spring 35. This is so that the clutch cylinder 44 can be driven to start only when the air pressure in the push rod mounting cavity 311 is large enough. During the inflation process of gear pump 41, check valve 413 opens, and the air pressure in push rod mounting cavity 311 gradually increases. After clutch mechanism 3 drives cooling fan 2 to start, gear pump 41 continues to pump air, and the air pressure in push rod mounting cavity 311 continues to increase. This pushes cylinder piston rod 443 to overcome the elastic force of gear return spring 45 and push rod return spring 442 and move towards driven wheel 422. Cylinder piston rod 443 contacts and squeezes driven wheel 422 to move outward. Driven wheel 422 disengages from driving wheel 421, and connecting shaft 31 cannot transmit torque to gear pump 41 through transmission gear pair 42. Gear pump 41 stops inflation, check valve 413 closes, and push rod mounting cavity 311 is a sealed cavity that maintains pressure. Clutch mechanism 3 remains open. When the connecting shaft 31 stops rotating along with the motor shaft 1, the vent valve 315 resets under the restoring force of the valve return spring 316 and opens the shaft vent hole 314. The gas in the push rod mounting cavity 311 is discharged from the shaft vent hole 314. The piston push rod 32 resets under the spring force of the clutch return spring 34, and the friction plate resets under the spring force of the friction block return spring 35. At this time, the cooling fan 2 separates from the friction block 33. It can be seen that the design of the clutch cylinder 44, the one-way valve 413, and the vent valve 315 can reduce the load on the motor and save energy while enabling the clutch mechanism 3 to start continuously.

[0034] Working principle:

[0035] After the egg beater is started, the motor starts, and the connecting shaft 31 rotates together with the motor shaft 1. The connecting shaft 31 drives the gear pump 41 to draw air through the transmission gear pair 42. The one-way valve 413 opens, and the gas enters from the air pump inlet 411 and flows through the air pump outlet 412, the annular air passage 43 and the shaft inlet 313 in sequence, finally entering the push rod mounting cavity 311 of the connecting shaft 31, thus inflating the push rod mounting cavity 311. After the motor shaft 1 rotates for a period of time, the air pressure in the push rod mounting cavity 311 increases. As the pressure gradually increases, when the air pressure exceeds the elastic force of the clutch return spring 34 and the friction block return spring 35, the piston push rod 32 is pushed by the air pressure and moves towards the friction block 33. The end of the piston push rod 32 presses against the wedge-shaped surface 331 of the two friction blocks 33, causing the two friction blocks 33 to move outward. The two friction blocks 33 then contact and press against the inner wall of the cooling fan 2. The driving friction between the friction blocks 33 and the cooling fan 2 gradually increases with the increase of the pressing force. The cooling fan 2 rotates with the connecting shaft 31 and generates cooling airflow. The gear pump 41 continues to pump air, and the air pressure in the push rod mounting cavity 311 continues to increase. This can push the cylinder piston rod 443 to overcome the elastic force of the gear return spring 45 and the push rod return spring 442 and move towards the driven wheel 422. The cylinder piston rod 443 contacts and squeezes the driven wheel 422 to move outward. The driven wheel 422 disengages from the driving wheel 421. The connecting shaft 31 can no longer transmit torque to the gear pump 41 through the transmission gear pair 42. The gear pump 41 stops charging air, and the one-way valve 413 closes. At this time, the push rod mounting cavity 311 is a sealed cavity and maintains pressure. The clutch mechanism 3 remains open. When the connecting shaft 31 stops rotating with the motor shaft 1, the vent valve 315 resets under the rebound force of the valve reset spring 316 and opens the shaft vent hole 314. The gas in the push rod mounting cavity 311 is discharged from the shaft vent hole 314. The piston push rod 32 resets under the elastic force of the clutch reset spring 34, and the friction plate resets under the elastic force of the friction block reset spring 35. At this time, the cooling fan 2 separates from the friction block 33, and the gear reset spring 45 and the push rod reset spring 442 drive the driven wheel 422 and the cylinder piston rod 443 to reset respectively.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions created by the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions created by the present invention without departing from the essence and scope of the technical solutions created by the present invention.

Claims

1. An electric motor, comprising a motor shaft and a cooling fan for heat dissipation, characterized in that, It also includes a clutch mechanism and a clutch starting mechanism. The clutch mechanism includes a connecting shaft, a piston push rod, a friction block, and a clutch return spring. The connecting shaft is coaxially connected to the motor shaft and rotates with the motor shaft. The cooling fan is fitted onto the connecting shaft and can rotate around the connecting shaft. A push rod mounting cavity is opened inside the connecting shaft. An insertion port communicating with the push rod mounting cavity is opened on the side wall of the connecting shaft. The inner surface of the cooling fan is opposite to the insertion port. The friction block is installed in the insertion port and can move along the radial direction of the connecting shaft. A wedge-shaped surface is provided on the inward side of the friction block. The piston push rod is axially set in the push rod mounting cavity of the connecting shaft and can move along the axial direction of the connecting shaft. The end of the piston push rod contacts the wedge-shaped surface of the friction block. The clutch return spring is fitted onto the piston push rod and is used for piston push rod reset. The clutch starting mechanism can delay driving the piston push rod to move towards the friction block side to delay turning on the cooling fan.

2. The motor according to claim 1, characterized in that, It also includes a braking mechanism, which is located on one side of the cooling fan and can brake the cooling fan before the clutch mechanism is activated, so as to prevent the cooling fan from starting prematurely.

3. The motor according to claim 2, characterized in that, The braking mechanism includes an outer brake cylinder, a brake pin, and a brake spring. The outer brake cylinder is fitted onto and fixed to the connecting shaft. The brake pin is connected to the cooling fan and can move in the radial direction of the cooling fan. The brake spring is located between the brake pin and the cooling fan. The brake spring presses the brake pin against the surface of the outer brake cylinder to generate braking friction.

4. The motor according to claim 3, characterized in that, The contact surface between the brake outer cylinder and the brake pin is provided with friction ridges to increase braking friction.

5. The motor according to claim 1, characterized in that, The clutch starting mechanism includes a gear pump, a transmission gear pair, and an annular air passage. The connecting shaft has an air inlet and an air outlet that communicate with the push rod mounting cavity. The annular air passage is fitted onto the connecting shaft and communicates with the air inlet. The annular air passage has an air passage inlet. The gear pump is installed on one side of the annular air passage. The gear pump has an air pump inlet and an air pump outlet. The air pump inlet communicates with the air passage inlet of the annular air passage. The connecting shaft is connected to the gear pump via the transmission gear pair and can drive the gear pump to charge air into the push rod mounting cavity.

6. The motor according to claim 5, characterized in that, The transmission gear pair includes a driving gear, a driven gear, and a transmission shaft. The driving gear is mounted on the connecting shaft and rotates with it. The driven gear meshes with the driving gear and is mounted on the transmission shaft, allowing it to move along the shaft's axis. The transmission shaft drives the gear pump to start. The gear pump also has a one-way valve, installed at the pump's air inlet, which opens when the pump starts. The connecting shaft also has a vent valve and a valve return spring. The vent valve is movably mounted at the shaft's exhaust port, and the valve return spring is mounted on the shaft. Between the exhaust port and the vent valve, the vent valve can close the exhaust port of the shaft when the shaft rotates; the clutch starting mechanism also includes a clutch cylinder and a gear return spring, which are located on both sides of the driven wheel. The gear return spring is fitted onto the drive shaft and contacts the driven wheel. The clutch cylinder has a cylinder inlet and a cylinder piston rod. The cylinder inlet is connected to the air outlet of the gear pump. The cylinder piston rod can extend out of the clutch cylinder to squeeze the driven wheel away from the driving wheel when the clutch mechanism is started.

7. The motor according to claim 6, characterized in that, The drive shaft and the driven wheel are connected by a key.

8. An electric egg beater, characterized in that, Includes the motor as described in any one of claims 1 to 7.

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