Electric actuator protection device

Abstract

The invention belongs to the technical field of electrical devices, and relates to an electric actuator protection device which is fixed on a base, a fixing plate 1 and a fixing plate 2 are arranged at the two ends of the base respectively, two round holes are formed in the surfaces of the two fixing plates at the same height, and a bearing 1 and a bearing 2 are installed in the two round holes of the fixing plate 1 respectively. A bearing 3 is mounted in a round hole, opposite to the bearing 2, in the surface of the fixed plate 2; the end, located on the inner side of the fixing plate 1, of the transmission shaft 2 is connected with a gear motor, and the other end of the gear motor is connected with a telescopic rod. The telescopic rod penetrates through the bearing 3 and can move in the horizontal direction. The device is simple in structure, when the transmission shaft is stuck and the gears are continuously rubbed, the motor works, the transmission shaft is stuck, the motor rotates reversely, the motor rotates to drive the telescopic shaft to move backwards, and after the telescopic shaft moves to the induction range of the proximity switch, shutdown operation is conducted, and the motor and the gears are effectively protected.

Description

Technical Field

[0001] The invention belongs to the technical field of electrical devices and relates to a protection device, in particular to an electric actuator protection device. Background Art

[0002] In the hot pressing process of wooden floor, since hot pressing requires heating, the temperature of the hot press is increased by adding hot water into the pipeline. When the temperature does not reach the preset value, the electric actuator rotates forward to open the throttle valve and hot water is injected. When the temperature reaches the preset value, the electric actuator reverses to close the throttle valve and stop injecting hot water. In order to keep the temperature stable, the electric actuator needs to be operated frequently. When the electric actuator is working, frequent operation will cause the transmission shaft to get stuck, resulting in constant friction between gears and damage to the gears. The protective device disclosed in the present invention senses the proximity switch through a telescopic rod to shut down the machine when the transmission shaft is stuck. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention discloses an electric actuator protection device to ensure that the motor can be shut down by sensing a proximity switch through a telescopic rod when the transmission shaft is stuck.

[0004] To achieve the above object, the technical solution adopted by the present invention is: A protective device for an electric actuator is fixed on a base, with a fixing plate 1 and a fixing plate 2 respectively provided at both ends of the base, two circular holes of the same height being opened on the surfaces of the two fixing plates, a bearing 1 and a bearing 2 being respectively installed in the two circular holes of the fixing plate 1, and a bearing 3 being installed in the circular hole on the surface of the fixing plate 2 opposite to the circular hole in which the bearing 2 is installed; a transmission shaft 2 is sleeved in the bearing 2, one end of the transmission shaft 2 located on the inner side of the fixing plate 1 is connected to a reduction motor, and the other end of the reduction motor is connected to a telescopic rod; the telescopic rod passes through the bearing 3 and can move in the horizontal direction.

[0005] Furthermore, a gear 2 is installed at one end of the transmission shaft 2 located outside the fixing plate 1 .

[0006] Furthermore, there is a transmission shaft 1 sleeved in the bearing 1, and a gear 1 is installed at a position opposite to the transmission shaft 2 and meshes with the gear 2.

[0007] Furthermore, there is a proximity switch fixed on the outer side of the fixed plate 1, which starts to operate when it senses that the end of the telescopic rod is approaching, so as to stop the reduction motor.

[0008] Furthermore, the transmission shaft 2 is connected to the reduction motor via a coupling.

[0009] Furthermore, a support spring is sleeved on the telescopic rod, one end of the support spring is connected to the fixed plate 2, and the other end is connected to the reduction motor.

[0010] When the reduction motor is working, the two gears often rub against each other due to the jamming of the transmission shaft. Long-term friction will damage the gears. This device fixes the reduction motor through the elastic force of the support spring. Under normal circumstances, the rotation of the motor drives the gears to rotate, and the rotation force is less than the elastic force of the support spring, so it can work normally; when the transmission shaft is stuck and the gears rub against each other, because the reduction motor is still working, but the transmission shaft is stuck, the motor is rotated in the reverse direction. The rotation of the motor causes the telescopic rod to move in the opposite direction. After moving to the sensing range of the proximity switch, the shutdown operation is performed. This device can achieve forward and reverse rotation of the motor, effectively protecting the motor and gears.

[0011] Circuit components and local function description: 1. The base of the electric actuator is used to fix various components; 2. The reduction motor controls the rotation of the gears by forward and reverse rotation, and the gears drive the transmission shaft to move telescopically; 3. The support spring provides support force to the reduction motor. Under normal circumstances, the rotation of the motor drives the gear to rotate, and the rotation force is smaller than the force of the spring. When the gear is stuck, the rotation force is greater than the elastic force of the spring. 4. When the gear is stuck, the telescopic shaft moves backward due to the rotation of the reduction motor. After it moves to the sensing range of the proximity switch, the shutdown operation is started. Beneficial Effects

[0012] The structure of this device is relatively simple. The reduction motor is fixed by a spring. Under normal circumstances, the rotation of the motor drives the gear to rotate. The rotation force is smaller than the force of the spring, so it can work normally. When the transmission shaft is stuck and the gears are constantly rubbing against each other, because the motor is still working but the transmission shaft is stuck, the motor is rotated in the reverse direction. The rotation of the motor drives the telescopic shaft to move backward. After moving to the sensing range of the proximity switch, the shutdown operation is performed. Whether the motor is rotating forward or reverse, the shutdown protection can be achieved, effectively protecting the motor and gears. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 . Three-dimensional diagram of the electric actuator protection device; Figure 2 . Front view of the electric actuator protection device; Among them, the names of the components are: 1. reduction motor; 2-1. bearing 1; 2-2. bearing 2; 2-3. bearing 3; 3-1. transmission shaft 1; 3-2. transmission shaft 2; 4-1. gear 1; 4-2. gear 2; 5. telescopic rod; 6. proximity switch; 7-1. fixed plate 1; 7-2. fixed plate 2; 8. support spring; 9. base. Implementation

[0014] The present invention is described in detail below in conjunction with the embodiments so that those skilled in the art can better understand the present invention, but the present invention is not limited to the following embodiments. Example

[0015] A protective device for an electric actuator is fixed on a base 9. A fixing plate 1 and a fixing plate 2 are respectively provided at both ends of the base 9. Two circular holes are opened on the surfaces of the two fixing plates at the same height. A bearing 1 and a bearing 2 are respectively installed in the two circular holes of the fixing plate 1. A bearing 3 is installed in the circular hole on the surface of the fixing plate 2 opposite to the circular hole where the bearing 2 is installed. A transmission shaft 2 is sleeved in the bearing 2. One end of the transmission shaft 2 located on the inner side of the fixing plate 1 is connected to a reduction motor 1. One end of the transmission shaft 2 located on the outer side of the fixing plate 1 is equipped with a gear 2. The other end of the reduction motor 1 is connected to a telescopic rod 5. The telescopic rod 5 passes through the bearing 3 and can move in the horizontal direction. Example

[0016] A protective device for an electric actuator is fixed on a base 9. A fixing plate 1 and a fixing plate 2 are respectively provided at both ends of the base 9. Two circular holes are opened on the surfaces of the two fixing plates at the same height. A bearing 1 and a bearing 2 are respectively installed in the two circular holes of the fixing plate 1. A bearing 3 is installed in the circular hole on the surface of the fixing plate 2 opposite to the circular hole where the bearing 2 is installed. A transmission shaft 2 is sleeved in the bearing 2. The end of the transmission shaft 2 located on the inner side of the fixing plate 1 is connected to a reduction motor 1. The end of the transmission shaft 2 located on the outer side of the fixing plate 1 is equipped with a gear 2. The transmission shaft 1 is sleeved in the bearing 1. A gear 1 is installed at a position opposite to the transmission shaft 2 and meshes with the gear 2. The other end of the reduction motor 1 is connected to a telescopic rod 5. The telescopic rod 5 passes through the bearing 3 and can move horizontally. Example

[0017] An electric actuator protection device is fixed on a base 9. A fixed plate 1 and a fixed plate 2 are respectively provided at both ends of the base 9. Two circular holes are opened on the surfaces of the two fixed plates at the same height. A bearing 1 and a bearing 2 are respectively installed in the two circular holes of the fixed plate 1. A bearing 3 is installed in the circular hole on the surface of the fixed plate 2 opposite to the one where the bearing 2 is installed. A transmission shaft 2 is sleeved in the bearing 2. The end of the transmission shaft 2 located on the inner side of the fixed plate 1 is connected to the reduction motor 1. The end of the transmission shaft 2 located on the outer side of the fixed plate 1 is equipped with a gear 2. The transmission shaft 1 is sleeved in the bearing 1. A gear 1 is installed at a position relative to the transmission shaft 2 and meshes with the gear 2. The other end of the reduction motor 1 is connected to a telescopic rod 5. The telescopic rod 5 passes through the bearing 3 and can move in the horizontal direction. There is also a proximity switch 6 fixed on the outer side of the fixed plate 1. When the end of the telescopic rod 5 is sensed to be close, it starts to operate to stop the reduction motor 1. Example

[0018] An electric actuator protection device is fixed on a base 9. A fixed plate 1 and a fixed plate 2 are respectively provided at both ends of the base 9. Two circular holes are opened on the surfaces of the two fixed plates at the same height. A bearing 1 and a bearing 2 are respectively installed in the two circular holes of the fixed plate 1. A bearing 3 is installed in the circular hole on the surface of the fixed plate 2 opposite to the circular hole where the bearing 2 is installed. A transmission shaft 2 is sleeved in the bearing 2. The end of the transmission shaft 2 located on the inner side of the fixed plate 1 is connected to the reduction motor 1. Specifically, the transmission shaft 2 and the reduction motor 1 are connected through a coupling. A gear 2 is installed at the end of the transmission shaft 2 located on the outer side of the fixed plate 1. The transmission shaft 1 is sleeved in the bearing 1. A gear 1 is installed at a position relative to the transmission shaft 2 and meshes with the gear 2. The other end of the reduction motor 1 is connected to a telescopic rod 5. The telescopic rod 5 passes through the bearing 3 and can move in the horizontal direction. There is also a proximity switch 6 fixed on the outer side of the fixed plate 1. When the end of the telescopic rod 5 is sensed to be close, it starts to operate to stop the reduction motor 1. Example

[0019] An electric actuator protection device is fixed on a base 9. A fixed plate 1 and a fixed plate 2 are respectively provided at both ends of the base 9. Two circular holes are opened on the surfaces of the two fixed plates at the same height. A bearing 1 and a bearing 2 are respectively installed in the two circular holes of the fixed plate 1. A bearing 3 is installed in the circular hole on the surface of the fixed plate 2 opposite to the circular hole where the bearing 2 is installed. A transmission shaft 2 is sleeved in the bearing 2. The end of the transmission shaft 2 located on the inner side of the fixed plate 1 is connected to the reduction motor 1. Specifically, the transmission shaft 2 and the reduction motor 1 are connected through a coupling. A gear 2 is installed at the end of the transmission shaft 2 located on the outer side of the fixed plate 1. The transmission shaft 1 is sleeved in the bearing 1. A gear 1 is installed at a position relative to the transmission shaft 2 and meshes with the gear 2. The other end of the reduction motor 1 is connected to a telescopic rod 5. The telescopic rod 5 passes through the bearing 3 and can move in the horizontal direction. There is also a proximity switch 6 fixed on the outer side of the fixed plate 1. When the end of the telescopic rod 5 is sensed to be close, it starts to operate to stop the reduction motor 1. A support spring 8 is sleeved on the telescopic rod 5 , one end of the support spring 8 is connected to the fixing plate 2 , and the other end is connected to the reduction motor 1 .

[0020] When the motor is working, the transmission shaft often gets stuck, causing the gears to rub against each other constantly. Long-term friction will damage the gears. The device fixes the reduction motor through the force of the spring. Under normal circumstances, the motor rotates to drive the gears to rotate, and the rotation force is less than the spring force, so it can work normally. When the transmission shaft gets stuck, causing the gears to rub against each other constantly, because the motor is still working, but the transmission shaft is stuck, the motor is rotated in the reverse direction. The rotation of the motor causes the telescopic shaft to move backward. After moving to the sensing range of the proximity switch, the shutdown operation is performed. This can be achieved regardless of whether the motor is rotating forward or reverse, effectively protecting the motor and gears.

[0021] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the specification of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An electric actuator protection device, fixed on a base (9), characterized in that: A fixing plate 1 (7-1) and a fixing plate 2 (7-2) are respectively provided at both ends of the base (9). Two circular holes are opened on the surfaces of the two fixing plates at the same height. A bearing 1 (2-1) and a bearing 2 (2-2) are respectively installed in the two circular holes of the fixing plate 1 (7-1). A bearing 3 (2-3) is installed in the circular hole on the surface of the fixing plate 2 (7-2) opposite to the circular hole in which the bearing 2 (2-2) is installed. A transmission shaft 2 (3-2) is sleeved in the bearing 2 (2-2). One end of the transmission shaft 2 (3-2) located on the inner side of the fixing plate 1 (7-1) is connected to the reduction motor (1), and the other end of the reduction motor (1) is connected to the telescopic rod (5). The telescopic rod (5) passes through the bearing 3 (2-3) and can move in the horizontal direction. The proximity switch (6) is fixed on the outer side of the fixing plate 1 (7-1).

2. The electric actuator protection device according to claim 1, characterized in that: The transmission shaft 2 (3-2) is provided with a gear 2 (4-2) at one end located outside the fixed plate 1 (7-1).

3. The electric actuator protection device according to claim 1, characterized in that: The transmission shaft 1 (3-1) is sleeved in the bearing 1 (2-1), and a gear 1 (4-1) is installed at a position opposite to the transmission shaft 2 (3-2) and meshes with the gear 2 (4-2).

4. The electric actuator protection device according to claim 1, characterized in that: When the proximity switch (6) senses that the end of the telescopic rod (5) is approaching, it starts to operate, thereby stopping the reduction motor (1).

5. The electric actuator protection device according to claim 1, characterized in that: The transmission shaft 2 (3-2) is connected to the reduction motor (1) via a coupling.

6. The electric actuator protection device according to claim 1, characterized in that: A support spring (8) is sleeved on the telescopic rod (5), one end of the support spring (8) is connected to the fixed plate 2 (7-2), and the other end is connected to the reduction motor (1).

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