Automatic power conversion device of pedal and electric dual-purpose fan for civil air defense engineering

Abstract

A civil air defense engineering pedal and electric dual-purpose fan power automatic conversion device is traditionally converted through a gear box reversing device and comprises a machine frame, the machine frame is connected with a bicycle, a motor and a machine frame shaft, the motor is connected with a fan output shaft through a belt and a belt wheel, the fan output shaft is connected with a driven shaft, and the driven shaft is in threaded connection with a nut. The driven shaft is connected with an input shaft pin and a middle sleeve, the outer side of the driven shaft is sleeved with a spring, the two sides of the spring abut against a nut and a baffle ring of the middle sleeve, the input shaft pin is connected with a rear straight groove of the middle sleeve, the middle sleeve is connected with a driving shaft, the driving shaft is connected with an output shaft pin, and the output shaft pin is connected with an inclined groove and a front straight groove of the middle sleeve. The driving shaft is connected with a rack shaft, and the rack shaft is connected with a bicycle through a belt wheel and a belt. The product is used for automatic switching of the pedal and electric dual-purpose fan for civil defense workers.

Description

Technical Field

[0001] This utility model relates to the field of automatic power conversion device for foot-operated and electric dual-purpose fans in civil defense projects, and in particular to an automatic power conversion device for foot-operated and electric dual-purpose fans in civil defense projects. Background Technology

[0002] The foot-operated and electric dual-purpose fan is a type of civil defense equipment. It is essential for the use of filtered ventilation in civil defense fortifications and air-raid shelters when power is destroyed during wartime, or when the enemy uses atomic, chemical, or biological weapons. The foot-operated electric fan ensures that filtered ventilation for a 400-person unit can be provided manually during wartime. Simultaneously, considering peacetime and wartime compatibility, it can utilize electricity for ventilation in civil defense fortifications, underground hotels, restaurants, and shopping malls. Because the foot-operated electric fan's input shaft receives both pedal and electric power inputs, these two power sources cannot be input simultaneously. Traditional methods use a gearbox reversing device for switching, but this requires manual operation, leading to potential errors, delays in ventilation, and safety risks. A device is needed to address these issues. Utility Model Content

[0003] This utility model addresses the aforementioned shortcomings of the existing technology by providing an automatic power conversion device for a dual-purpose foot-operated and electric fan used in civil defense projects, which automatically switches between foot pedal and electric operation without requiring manual reversing.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] An automatic power conversion device for a dual-purpose (pedal-operated and electric) fan used in civil defense engineering includes a frame. The frame connects a pedal vehicle, a motor, and a frame shaft. The motor is connected to a fan output shaft via a belt and pulleys. The fan output shaft is connected to a driven shaft. The driven shaft is threadedly connected to a nut and an input shaft pin. The driven shaft is connected to an intermediate sleeve. A spring is fitted onto the outside of the driven shaft. The spring's two sides abut against the nut and the intermediate sleeve's retaining rings. The input shaft pin connects to the rear straight groove of the intermediate sleeve. The intermediate sleeve connects to a drive shaft. The drive shaft connects to an output shaft pin, which connects to the oblique groove and front straight groove of the intermediate sleeve. The drive shaft connects to the frame shaft. The frame shaft is connected to the pedal vehicle via pulleys and a belt.

[0006] The passive shaft is threaded to a nut in the middle, and the input shaft pin is fixedly connected to the pin hole of the passive shaft. The passive shaft is inserted into the intermediate sleeve, and a spring is fitted on the outside of the passive shaft. The spring abuts against the nut and the retaining ring of the intermediate sleeve on both sides.

[0007] The intermediate sleeve has a rear straight groove on one side, and the input shaft pin is connected to the rear straight groove. The intermediate sleeve has an inclined groove on the other side, and a front straight groove is provided on the outside of the inclined groove. The drive shaft is fixedly connected to the output shaft pin. The drive shaft is inserted into the intermediate sleeve. The output shaft pin connects the inclined groove and the front straight groove. The frame shaft is fixedly connected to the outside of the drive shaft. Beneficial effects

[0008] When the fan is driven by an electric motor, the motor's rotation causes the fan's output shaft to rotate. At this time, the intermediate sleeve is positioned on one side of the frame shaft under the action of the spring, and the input shaft pin and the rear straight groove are disengaged. The driven shaft rotates freely with the fan's output shaft. When the fan is driven by a bicycle, the user pedals the bicycle, which transmits rotation to the frame shaft. The frame shaft rotates, causing the drive shaft to rotate. When the drive shaft rotates, the output shaft pin generates axial thrust on the inclined surface of the inclined groove. The intermediate sleeve overcomes the spring force and is pushed towards the fan side. When the output shaft pin slides into the front straight groove, only radial force is generated, and the intermediate sleeve stops moving. When the intermediate sleeve moves, the input shaft pin gets stuck in the rear straight groove. At this time, the frame shaft drives the drive shaft to rotate, the drive shaft drives the intermediate sleeve to rotate, and the intermediate sleeve drives the driven shaft to rotate. When the user stops pedaling the bicycle, the spring resets the intermediate sleeve, and the input shaft pin moves out of the rear straight groove, thus realizing automatic power conversion.

[0009] This device requires no manual reversing; the power automatically switches between foot pedal and electric operation, overcoming the safety risks that may arise from misoperation during manual reversal and preventing delays in ventilation. The nut and spring work together to adjust the thrust of the intermediate sleeve, ensuring normal reset of the intermediate sleeve and smooth switching movement when pedaled. The inclined groove and the front straight groove work together to generate both axial force for the movement of the intermediate sleeve and to transmit torque. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the automatic power conversion device for a foot-operated and electric dual-purpose fan in civil defense engineering, as described in this utility model.

[0011] Figure 2 This is a schematic diagram of the connection structure of the passive shaft, intermediate sleeve, and active shaft described in this utility model.

[0012] Figure 3 This is a schematic diagram of the passive shaft structure described in this utility model.

[0013] Figure 4 This is a schematic diagram of the intermediate sleeve structure described in this utility model. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0015] An automatic power conversion device for a foot-operated and electric dual-purpose fan in civil defense engineering includes a frame 210, which connects a foot-operated bicycle 250, a motor 240, and a frame shaft 220. The motor 240 is connected to the output shaft of a fan 230 via a belt and pulley. The output shaft of the fan 230 is connected to a driven shaft 110, and the driven shaft 110 is threadedly connected to a nut 170. The passive shaft 110 is connected to the input shaft pin 150. The passive shaft 110 is connected to the intermediate sleeve 120. A spring 160 is fitted onto the outside of the passive shaft 110. The spring 160 abuts against the nut 170 and the retaining ring 124 of the intermediate sleeve 120 on both sides. The input shaft pin 150 is connected to the rear straight groove 123 of the intermediate sleeve 120. The intermediate sleeve 120 is connected to the drive shaft 130. The drive shaft 130 is connected to the output shaft pin 140. The output shaft pin 140 is connected to the inclined groove 121 and the front straight groove 122 of the intermediate sleeve 120. The drive shaft 130 is connected to the frame shaft 220. The frame shaft 220 is connected to the bicycle 250 through pulleys and belts.

[0016] The passive shaft 110 is threaded to the nut 170 via the thread 111 in the middle. The input shaft pin 150 is fixedly connected to the pin hole 112 of the passive shaft 110. The passive shaft 110 is inserted into the intermediate sleeve 120. A spring 160 is fitted onto the outside of the passive shaft 110. The two sides of the spring 160 abut against the retaining rings 124 of the nut 170 and the intermediate sleeve 120, respectively.

[0017] The intermediate sleeve 120 has a rear straight groove 123 on one side, and the input shaft pin 150 is connected to the rear straight groove 123. The intermediate sleeve 120 has an inclined groove 121 on the other side, and a front straight groove 122 is provided on the outside of the inclined groove 121. The drive shaft 130 is fixedly connected to the output shaft pin 140. The drive shaft 130 is inserted into the intermediate sleeve 120. The output shaft pin 140 connects the inclined groove 121 and the front straight groove 122. The frame shaft 220 is fixedly connected to the outside of the drive shaft 130.

[0018] When the motor 240 drives the fan 230, the rotation of the motor 240 causes the output shaft of the fan 230 to rotate. At this time, the intermediate sleeve 120 is located on one side of the frame shaft 220 under the action of the spring 160. The input shaft pin 150 and the rear straight groove 123 are in a disengaged state, and the driven shaft 110 rotates freely with the output shaft of the fan 230. When the bicycle 250 drives the fan 230, the bicycle 250 is manually pedaled, and the bicycle 250 transmits rotation to the frame shaft 220. The rotation of the frame shaft 220 causes the drive shaft 130 to rotate. When the intermediate sleeve 120 rotates, the output shaft pin 140 generates axial thrust on the inclined surface of the inclined groove 121. 120 is pushed towards the fan 230 by overcoming the spring force of spring 160. When the output shaft pin 140 slides into the front straight groove 122, only radial force is generated, and the intermediate sleeve 120 no longer moves. When the intermediate sleeve 120 moves, the input shaft pin 150 will be stuck in the rear straight groove 123. At this time, the frame shaft 220 drives the drive shaft 130 to rotate, the drive shaft 130 drives the intermediate sleeve 120 to rotate, and the intermediate sleeve 120 drives the driven shaft 110 to rotate. When the user stops pedaling the bicycle 250, the spring 160 resets the intermediate sleeve 120, and the input shaft pin 150 moves out of the rear straight groove 123, realizing the automatic conversion of power.

[0019] This device requires no manual reversing; the power automatically switches between foot pedal and electric operation, overcoming the safety risks that may arise from misoperation during manual reversal and preventing delays in ventilation. The nut 170 and spring 160 work together to adjust the thrust of the intermediate sleeve 120, ensuring that the intermediate sleeve 120 can return to its normal position and move smoothly when pedaled. The inclined groove 121 and the front straight groove 122 work together to generate both the axial force for the movement of the intermediate sleeve 120 and to transmit torque.

Claims

1. An automatic power conversion device for a foot-operated and electric dual-purpose fan in civil defense engineering, comprising a frame, characterized in that... The frame connects the bicycle, the motor, and the frame shaft. The motor is connected to the fan output shaft via a belt and pulley. The fan output shaft is connected to the driven shaft. The driven shaft is threadedly connected to a nut. The driven shaft is connected to an input shaft pin. The driven shaft is connected to an intermediate sleeve. A spring is fitted onto the outside of the driven shaft. The spring abuts against the retaining rings of the nut and the intermediate sleeve on both sides. The input shaft pin is connected to the rear straight groove of the intermediate sleeve. The intermediate sleeve is connected to the drive shaft. The drive shaft is connected to an output shaft pin. The output shaft pin is connected to the inclined groove and the front straight groove of the intermediate sleeve. The drive shaft is connected to the frame shaft. The frame shaft is connected to the bicycle via pulleys and a belt.

2. The automatic power conversion device for a foot-operated and electric dual-purpose fan in civil defense engineering according to claim 1, characterized in that: The passive shaft is connected to a nut via a threaded connection in the middle. The passive shaft is fixedly connected to an input shaft pin via a pin hole. The passive shaft is inserted into an intermediate sleeve. A spring is fitted onto the outside of the passive shaft. The spring abuts against the nut and the retaining ring of the intermediate sleeve on both sides.

3. The automatic power conversion device for a foot-operated and electric dual-purpose fan in civil defense engineering according to claim 1 or 2, characterized in that: The intermediate sleeve has a rear straight groove on one side, and the input shaft pin is connected to the rear straight groove. The intermediate sleeve has an inclined groove on the other side, and a front straight groove is provided on the outside of the inclined groove. The drive shaft is fixedly connected to the output shaft pin. The drive shaft is inserted into the intermediate sleeve. The output shaft pin connects the inclined groove and the front straight groove. The frame shaft is fixedly connected to the outside of the drive shaft.

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