A double cam release mechanism, a motor comprising the release mechanism and applications thereof

Abstract

The present application belongs to the technical field of release. The present application discloses a double-cam release mechanism, which comprises a release rod, a transmission cam, a transmission part, a brake device and an elastic reset part. A transmission pin is arranged on one side of the release rod, and a release head is arranged on one end of the release rod close to the transmission pin. The side of the release rod provided with the transmission pin is connected to the transmission cam through a hole. The transmission cam comprises a transmission driving slope, and the top end of the transmission driving slope is provided with a transmission limiting part. The transmission part is connected to the transmission cam. The brake device is used to brake the transmission cam. The elastic reset part is used to reset the release rod. The present application discloses a motor. The present application discloses an application of the double-cam release mechanism. The release mechanism of the present application can automatically engage with the motor shaft of the motor to be released when the chain is pulled, so as to drive the motor shaft to rotate. When the chain is loosened, the elastic reset part can automatically disengage the release mechanism from the motor shaft.

Description

Technical Field

[0001] This invention belongs to the field of release technology, and in particular refers to a double cam release mechanism, a motor containing the release mechanism, and their applications. Background Technology

[0002] Currently, the chain release mechanisms for industrial gantry cranes both domestically and internationally include bevel gear release mechanisms, rope release mechanisms, and spring plate release mechanisms. In existing technologies, bevel gear release mechanisms utilize a pair of meshing bevel gears. These mechanisms require supports, and the high precision required for the supports, coupled with their large space requirements, makes lubrication difficult due to their enclosed design. This exacerbates bevel gear wear. Therefore, bevel gear release mechanisms are overly complex, resulting in high material and processing costs, difficult maintenance, severe wear, and short lifespan. The drawbacks of existing rope release mechanisms include the two light and long ropes being too close to the chain. During chain pulling, the ropes can easily become entangled in the chain box, causing the release mechanism to jam. Furthermore, the circular contact between the clutch handle and the release lever in existing technologies changes during clutch handle rotation. In some areas, the contact area is too small, leading to wear on the clutch handle and even clutch malfunction with repeated engagements. The disadvantage of the spring plate release mechanism in the existing technology is that it requires a spring plate to make the sprocket rotate. The spring plate is difficult to manufacture. If the elastic force is too small, it will easily slip. If the elastic force is too large, it will easily jam. It is difficult to produce qualified parts, and the failure rate is high. In addition, the elastic force of the spring plate will decrease after long-term use, and the spring plate needs to be replaced regularly. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this application provides a double-cam release mechanism that does not require a support base, occupies little space, does not require a pull rope, and has a large brake contact surface.

[0004] This invention discloses a double-cam release mechanism, which includes a release rod, a transmission cam, a transmission component, a braking device, and an elastic reset component. A transmission pin is provided on one side of the release rod, and a release head is provided at the end of the release rod near the transmission pin. The side of the release rod with the transmission pin is connected through to the transmission cam. The transmission cam includes an arc-shaped transmission drive slope, which includes a transmission bottom end and a transmission top end. The transmission bottom end is away from the release head, and the transmission top end is close to the release head. A transmission limiting part is provided at the top end of the transmission drive slope. The transmission pin abuts against the transmission bottom end and the transmission component is connected to the transmission cam. The transmission component is used to brake the transmission cam, the braking device is used to brake the transmission cam, and the elastic reset component is used to reset the release rod.

[0005] Furthermore, the braking device includes a driven pin, a driven cam, a brake pad, and a friction pad. The driven pin is located on the side of the release lever away from the drive pin. The driven cam includes an arc-shaped driven drive ramp, which includes a driven bottom end and a driven top end. The driven bottom end is away from the release head, and the driven top end is close to the release head. A driven limiting part is provided at the top end of the driven drive ramp. The driven pin abuts against the driven bottom end. The brake pad is located on the side of the driven cam away from the driven pin. The friction pad is fixedly located on one side of the release mechanism housing. The driven cam abuts against the friction pad through the brake pad.

[0006] Furthermore, one end of the elastic reset member is connected to the drive pin, and the other end of the elastic reset member is connected to the driven cam.

[0007] Furthermore, the dual-cam release mechanism includes a micro switch, which is located inside the housing and abuts against the release head.

[0008] Furthermore, the double cam release mechanism includes a roller connected to the outside of the housing.

[0009] Furthermore, the transmission cam includes four arc-shaped transmission drive inclined surfaces arranged opposite each other, wherein the transmission bottom ends of two transmission drive inclined surfaces are connected to each other, and the transmission top ends of two transmission drive inclined surfaces are connected to the transmission limiting part. The driven cam includes four arc-shaped driven drive inclined surfaces arranged opposite each other, wherein the driven bottom ends of two driven drive inclined surfaces are connected to each other, and the driven top ends of two driven drive inclined surfaces are connected to the driven limiting part.

[0010] The present invention discloses an electric motor, which includes a motor body, a motor shaft, a motor pin, and a double cam release mechanism as described above. The motor shaft passes through the electrode body and is connected to the inside of the motor body. The motor pin is connected to the end of the motor shaft away from the motor body. The end of the release mechanism with a release head is connected to the end of the motor body where the motor shaft is located.

[0011] This invention discloses an application of a double cam release mechanism, including its application in an electric motor.

[0012] Further, in S1: Connect any of the aforementioned double-cam release mechanisms to the motor shaft of the motor to be released through an opening at one end of the housing. Pull the chain of the release mechanism; the chain drives the transmission cam to rotate. The rotation of the transmission cam drives the transmission drive ramp to rotate. The rotating transmission drive ramp causes the transmission pin at the bottom of the transmission drive ramp to move along the bottom end of the transmission ramp to the top end of the transmission ramp, thereby causing the release rod and the driven pin connected to the transmission pin to rotate and move radially until the transmission pin reaches the transmission limit part at the top end of the transmission drive ramp. At this time, the release head engages with the motor pin on the motor. S2: Continue pulling the chain. The chain drives the release lever and the driven cam to rotate, and drives the motor pin that meshes with the release head to rotate. The rotation of the motor pin drives the motor shaft connected to the motor pin to rotate. S3: After the release head drives the motor shaft to the designated position, the chain is released. The elastic reset component drives the transmission pin to rotate and move radially along the transmission drive slope at the same time until the transmission pin reaches the bottom of the transmission drive slope. At this time, the release head and the motor pin of the motor are disengaged.

[0013] This invention employs a double-cam release mechanism. When the chain is pulled, the release mechanism automatically engages with the motor shaft of the motor to be released, thereby driving the motor shaft to rotate. A microswitch within the release mechanism automatically cuts off the motor's power supply, preventing the motor from operating electrically while the release mechanism is in use, ensuring user safety. When the chain is released, an elastic reset component automatically disengages the release mechanism from the motor shaft, and the microswitch automatically resets, restoring the motor to its electric state. This invention eliminates the support base and bevel gear while maintaining the release function. This reduces weight, making the release mechanism lighter, and the use of a double cam further lowers the failure rate. The use of an elastic reset component to reset the motor's power supply avoids the risk of the pull rope being caught in the chain during chain reset. By placing a brake pad on one side of the driven cam, the large and stable contact area between the brake pad and the friction plate provides a wide range of frictional force application, preventing jamming and slippage during use. Attached Figure Description

[0014] Figure 1 This is a cross-sectional structural diagram of a release mechanism in an embodiment of this application.

[0015] Figure 2 This is a schematic cross-sectional view of another release mechanism in the embodiments of this application.

[0016] Figure 3 This is a schematic diagram of a transmission cam in one embodiment of this application.

[0017] Figure 4 This is a schematic diagram of a driven cam in one embodiment of this application.

[0018] Figure 5 This is a cross-sectional structural diagram of the release mechanism and motor in an embodiment of this application.

[0019] In the figure: double cam release mechanism 100, release rod 11, transmission pin 111, release head 112, transmission cam 12, transmission drive ramp 121, transmission limit part 122, transmission component 13, brake device 14, driven pin 141, driven cam 142, driven drive ramp 1421, driven limit part 1422, brake pad 143, friction plate 144, elastic reset component 15, release mechanism housing 16, micro switch 17, roller 18, motor 200, motor body 21, motor shaft 22, motor pin 23. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions in the specific embodiments of the present invention will be clearly and completely described below.

[0021] This invention discloses a double-cam release mechanism 100, such as... Figure 1 As shown, the double-cam release mechanism 100 includes a release rod 11, a transmission cam 12, a transmission component 13, a braking device 14, and an elastic reset component 15. A transmission pin 111 is provided on one side of the release rod 11. A release head 112 is provided at the end of the release rod 11 near the transmission pin 111. The side of the release rod 11 with the transmission pin 111 is connected through to the transmission cam 12. The transmission cam 12 includes an arc-shaped transmission drive slope 121, which includes a transmission bottom end and a transmission top end. The transmission bottom end is away from the release head 112, and the transmission top end is close to the release head 112. A transmission limiting part 122 is provided at the top end of the transmission drive slope 121. The transmission pin 111 abuts against the transmission bottom end. The transmission component 13 is connected to the transmission cam 12. The transmission component 13 is used to brake the transmission cam 12, and the elastic reset component 15 is used to reset the release rod 11. The elastic reset component 15 can be a spring. This application uses the transmission component 13 to drive the transmission cam 12 to rotate. When the transmission cam 12 rotates, the transmission drive inclined surface 121 rotates. At this time, the transmission pin 111 at the bottom of the transmission moves along the bottom of the transmission drive inclined surface 121 to the top of the transmission, thereby driving the release rod 11 connected to the transmission pin 111 to rotate and move radially. The release head 112 also rotates and moves radially until the transmission pin 111 reaches the transmission limit part 122. At this time, the release head 112 is connected to the motor shaft to be released. At this time, if the pull rod is pulled further, the transmission cam 12 can only rotate. The release head 112 drives the motor shaft to be released to rotate.

[0022] As one implementation method, such as Figure 1As shown, the braking device 14 includes a driven pin 141, a driven cam 142, a brake pad 143, and a friction plate 144. The driven pin 141 is disposed on the side of the release lever 11 away from the drive pin 111. The driven cam 142 includes an arc-shaped driven drive ramp 1421, which includes a driven bottom end and a driven top end. The driven bottom end is away from the release head 112, and the driven top end is close to the release head 112. A driven limiting part 1422 is provided at the top end of the driven drive ramp 1421. The driven pin 141 abuts against the driven bottom end. The brake pad 143 is disposed on the side of the driven cam 142 away from the driven pin 141. The friction plate 144 is fixedly disposed on one side of the release mechanism housing 16. The driven cam 142 abuts against the friction plate 144 through the brake pad 143. One end of the elastic reset member 15 is connected to the drive pin 111, and the other end of the elastic reset member 15 is connected to the driven cam 142.

[0023] In use, the double cam release mechanism 100 of this application is first connected to the motor shaft to be released through the opening at one end of the release mechanism housing 16. After the connection is completed, the chain of the double cam release mechanism 100 is pulled, which drives the transmission cam 12 to rotate. The rotation of the transmission cam 12 drives the transmission drive inclined surface 121 to rotate. The rotation of the transmission drive inclined surface 121 drives the transmission pin 111, which abuts against the bottom end of the transmission, to move from the bottom end to the top end of the transmission. When the transmission pin 111 moves on the transmission drive inclined surface 121, it will generate rotational movement and radial movement. When the transmission pin 111 moves, the driven pin 141, which is connected to the transmission pin 111 via the transmission shaft, simultaneously rotates and moves radially on the driven drive ramp 1421. At this time, the driven cam 142 does not rotate. The driven pin 141 is initially set on the driven bottom end of the driven drive ramp 1421 on the driven cam 142. When the transmission pin 111 reaches the transmission limit part 122 at the transmission top end inside the transmission cam 12, the driven pin 141 also reaches the driven limit part 1422 at the driven top end inside the driven cam 142. At this time, the release head 112 connected to the release rod 11 near the end of the transmission pin 111 abuts against the motor shaft to be released. Continue pulling the chain. At this time, the transmission pin 111 reaches the transmission limit part 122 in the transmission cam 12, and the driven pin 141 reaches the driven limit part 1422 in the driven cam 142. Pulling the chain connected to the transmission cam 12 will drive the driven cam 142 to rotate. However, a brake pad 143 is provided on the side of the driven cam 142 away from the drive inclined surface, which abuts against the friction plate 144 on the release mechanism housing 16. There is friction between the brake pad 143 and the friction plate 144. At this time, pulling the chain will generate a certain resistance. When the pulling force exceeds the friction between the friction plate 144 and the brake pad 143, the driven cam 142 starts to rotate, and the motor shaft to be released, which abuts against the release head 112 on the other end of the release lever 11, is also driven to start rotating. Continue pulling the chain until the motor shaft to be released reaches the designated position, then release the chain. At this time, the elastic reset member 15 begins to spring back, and the transmission pin 111 connected to the elastic reset member 15 begins to reset. The transmission pin 111 moves from the transmission top end to the transmission bottom end of the transmission drive inclined surface 121 within the driven cam 142. The movement of the transmission pin 111 drives the release rod 11 and the release head 112 at one end of the release rod 11 to move, thereby separating the release head 112 from the motor shaft to be released. Through the above process, the double cam release mechanism 100 of this application completes a complete release process for the motor to be released. In this application, the number of transmission drive inclined surfaces 121 inside the transmission cam 12 can be one, two, or four. Preferably, the transmission cam 12 includes four transmission drive inclined surfaces 121. In this application, the number of driven drive inclined surfaces 1421 inside the driven cam 142 can be one, two, or four. Preferably, the driven cam 142 includes four driven drive inclined surfaces 1421.In this application, the double cam release mechanism 100 uses the friction between the brake pad 143 on the driven cam 142 and the friction plate 144 on the housing for braking. The friction can be adjusted by regulating the roughness of the contact surfaces between the brake pad 143 and the friction plate 144. This invention utilizes the double cam release mechanism 100 for use in door operators. It can be reset during power outages and rotates the motor shaft to be released when the chain is pulled, thereby causing the reduction mechanism within the door operator to move the door up and down. The double cam release mechanism 100 can also be used in cranes, machine tools, large fans, and other devices with motors, allowing them to be reset during power outages. After reset, the chain is released, and the elastic reset member 15 automatically disengages the double cam release mechanism 100 from the motor shaft to be released. This invention eliminates the support base and bevel gear while maintaining the release function, reducing weight and making the double cam release mechanism 100 lighter. Furthermore, the elimination of the bevel gear and the use of a double cam reduces the failure rate. The present invention provides a brake pad 143 on one side of the driven cam 142. The brake pad 143 has a large contact area with the friction pad 144 and the contact surface is stable, which makes it applicable to a wide range of friction forces. The double cam release mechanism 100 will not jam or slip during use.

[0024] In one implementation, the double-cam release mechanism 100 includes a micro switch 17, which is disposed inside the housing and abuts against the release head 112. When releasing the motor shaft to be released, the double-cam release mechanism 100 requires de-energizing the motor shaft. This is to prevent leakage current from the motor shaft during energization, which could threaten personal safety, and to prevent accidental start-up of the motor shaft, which could injure maintenance personnel. The double-cam release mechanism 100 includes a micro switch 17 for controlling the energization and de-energization of the motor shaft to be released. Figure 1 As shown, when the double cam release mechanism 100 is not in use, the release head 112 abuts against the micro switch 17. At this time, the micro switch 17 is closed, and the motor is energized. Figure 2 As shown, when the double cam release mechanism 100 is in use, the release head 112 moves towards the motor shaft to be released. Simultaneously, the micro switch 17 also moves as the release head 112 moves, until the release head 112 reaches the motor shaft to be released. At this point, the micro switch 17 disengages, and the motor is de-energized. After the motor is de-energized, the chain on the double cam release mechanism 100 continues to pull, driving the motor shaft to be released to rotate, ensuring user safety.

[0025] In one embodiment, the double cam release mechanism 100 includes a roller 18 connected to the outside of the housing. The double cam release mechanism 100 is operated by the user pulling the chain. However, the installation position of the double cam release mechanism 100 on the motor is uncertain; sometimes the chain direction is not perpendicular to the double cam release mechanism 100, but may be parallel to it. Sometimes the chain direction is inconvenient for the user to pull. This application provides a roller 18 on the outside of the release mechanism housing 16 of the double cam release mechanism 100. The chain can change direction via the roller 18, making it convenient for the user to change the chain direction and facilitating the operation of the double cam release mechanism 100.

[0026] In one embodiment, the transmission cam 12 of this application includes one or two arc-shaped transmission drive ramps 121, on which the transmission pin 111 moves. The driven cam 142 includes one or two arc-shaped driven drive ramps 1421, on which the driven pin 141 moves. However, the presence of only one or two transmission drive ramps 121 and only one or two driven drive ramps 1421 results in the sprocket only being able to pull in one direction. Figure 3 and Figure 4 As shown, preferably, the transmission cam 12 includes four opposing arc-shaped transmission drive ramps 121, wherein the transmission bottom ends of two transmission drive ramps are connected to each other, and the transmission top ends of two transmission drive ramps 121 are connected to the transmission limiting part 122. Preferably, the driven cam 142 includes four opposing arc-shaped driven drive ramps 1421, wherein the driven bottom ends of two driven drive ramps are connected to each other, and the driven top ends of two driven drive ramps 1421 are connected to the driven limiting part 1422. The above-described transmission drive ramps 121 and driven drive ramps 1421 allow the chain of the double cam release mechanism 100 to be pulled in two directions, increasing the practicality of the double cam release mechanism 100.

[0027] This invention discloses a motor 200, such as Figure 5 As shown, the motor 200 includes a motor body 21, a motor shaft 22, a motor pin 23, and any of the aforementioned double cam release mechanisms 100. The motor shaft 22 is connected to the motor body 21, and the motor pin 23 is connected to the end of the motor shaft 22 away from the motor body 21. One end of the double cam release mechanism 100 with a release head 112 is connected to the end of the motor body 21 where the motor shaft 22 is located. The motor 200 of the present invention can be used in various devices that require the use of a motor 200, such as gantry cranes, large fans, machine tools, cranes, conveyors, and compressors, and can reset the aforementioned machines when power is lost.

[0028] This invention discloses the application of a double cam release mechanism 100 in a motor 200.

[0029] As one implementation, the application of the double cam release mechanism 100 in the motor 200 includes S1: connecting any of the double cam release mechanisms 100 as described above to the motor shaft 22 of the motor 200 to be released through an opening at one end of the housing; pulling the chain of the double cam release mechanism 100; the chain drives the transmission cam 12 to rotate; the rotation of the transmission cam 12 drives the transmission drive inclined surface 121 to rotate; the rotating transmission drive inclined surface 121 drives the transmission pin 111 at the bottom of the transmission drive inclined surface 121 to move along the bottom of the transmission to the top of the transmission, thereby driving the release rod 11 and the driven pin 141 connected to the transmission pin 111 to perform rotational and radial movements until the transmission pin 111 reaches the transmission limiting part 122 at the top of the transmission drive inclined surface 121; at this time, the release head 112 engages with the motor pin 23 on the motor 200 and the driven pin 141 also reaches the driven limiting part 1422 at the driven top of the driven cam 142 on the driven drive inclined surface 1421. S2: Continue pulling the chain. The chain drives the release lever 11 and the driven cam 142 to rotate, which in turn drives the motor pin 23, which meshes with the release head 112, to rotate. The rotation of the motor pin 23 drives the motor shaft 22, which is connected to the motor pin 23, to rotate. S3: After the release head 112 drives the motor shaft 22 to the designated position, the chain is released. The elastic reset member 15 drives the transmission pin 111 to rotate and move radially along the transmission drive slope 121 simultaneously until the transmission pin 111 reaches the bottom of the transmission drive slope 121. At this time, the release head 112 and the motor pin 23 of the motor 200 are disengaged.

[0030] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A double-cam release mechanism, characterized in that, include: Release lever (11), a transmission pin (111) is provided on one side of the release lever (11), and a release head (112) is provided on the end of the release lever (11) near the transmission pin (111). The transmission cam (12) and the release lever (11) are connected through the transmission pin (111) on one side. The transmission cam (12) includes a transmission drive slope with an arc shape. The transmission drive slope includes a transmission bottom end and a transmission top end. The transmission bottom end is away from the release head (112), and the transmission top end is close to the release head (112). The top end of the transmission drive slope is provided with a transmission limit part (122), and the transmission pin (111) abuts against the transmission bottom end. Transmission component (13) is connected to transmission cam (12); Braking device (14) for braking the transmission cam (12); The elastic reset element (15) is used to reset the release lever (11); The braking device (14) includes a driven pin (141), a driven cam (1412), a brake pad (143), and a friction pad (144). The driven pin (141) is located on the release lever (11) on the side away from the drive pin (111). The driven cam (1412) includes an arc-shaped driven drive ramp (1421), which includes a driven bottom end and a driven top end. The driven bottom end is away from the release head (112). The top end is close to the release head (112), and the top end of the driven drive inclined surface (1421) is provided with a driven limit part (1422). The driven pin (141) abuts against the driven bottom end. The brake pad (143) is provided on the side of the driven cam (1412) away from the driven pin (141). The friction plate (144) is fixedly provided on one side of the release mechanism housing (16). The driven cam (1412) abuts against the friction plate (144) through the brake pad (143). One end of the elastic reset member (15) is connected to the drive pin (111), and the other end of the elastic reset member (15) is connected to the driven cam (1412).

2. The double-cam release mechanism according to claim 1, characterized in that: The double cam release mechanism includes a micro switch (17), which is located inside the release mechanism housing (16) and abuts against the release head (112).

3. The double-cam release mechanism according to claim 1, characterized in that: The double cam release mechanism includes a roller (18) which is connected to the outside of the housing.

4. The double-cam release mechanism according to claim 1, characterized in that: The transmission cam (12) includes four arc-shaped transmission drive ramps (121) arranged opposite to each other, wherein the transmission bottom ends of two transmission drive ramps are connected to each other, and the transmission top ends of two transmission drive ramps (121) are connected to the transmission limiting part (122). The driven cam (1412) includes four arc-shaped driven drive ramps (1421) arranged opposite to each other, wherein the driven bottom ends of the two driven drive ramps are connected to each other, and the driven top ends of the two driven drive ramps (1421) are connected to the driven limit portion (1422).

5. An electric motor, characterized in that, include: Motor body (21); The motor shaft (22) extends through the electrode body and connects to the inside of the motor body (21); Motor pin (23) is connected to the end of motor shaft (22) away from motor body (21); The double cam release mechanism as described in any one of claims 1 to 4, wherein one end of the release mechanism with the release head (112) is connected to the end of the motor shaft (22) on the motor body (21).

6. An application of a double-cam release mechanism, characterized in that: Application of the double cam release mechanism as described in any one of claims 1 to 4 in an electric motor.

7. The application of the double cam release mechanism as described in claim 6, characterized in that: S1: Connect the double cam release mechanism to the motor shaft (22) of the motor to be released through the opening at one end of the housing. Pull the chain of the release mechanism. The chain drives the transmission cam (12) to rotate. The rotation of the transmission cam (12) drives the transmission drive ramp (121) to rotate. The rotating transmission drive ramp (121) drives the transmission pin (111) at the bottom of the transmission drive ramp (121) to move along the bottom of the transmission to the top of the transmission. This drives the release rod (11) and the driven pin (141) connected to the transmission pin (111) to rotate and move radially until the transmission pin (111) reaches the transmission limit part (122) at the top of the transmission drive ramp (121). At this time, the release head (112) meshes with the motor pin (23) on the motor and the driven pin (141) also reaches the driven limit part (1422) at the top of the driven drive ramp (1421) on the driven cam (1412). S2: Continue pulling the chain, the chain drives the release lever (11) and the driven cam (1412) to rotate and drive the motor pin (23) meshing with the release head (112) to rotate, the rotation of the motor pin (23) drives the motor shaft (22) connected to the motor pin (23) to rotate; S3: After the release head (112) drives the motor shaft (22) to the designated position, the chain is released, and the elastic reset member (15) drives the transmission pin (111) to rotate and move radially along the transmission drive slope (121) at the same time until the transmission pin (111) reaches the bottom of the transmission of the transmission drive slope (121). At this time, the release head (112) and the motor pin (23) of the motor are disengaged.

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