A three-speed control box for actuator

Abstract

The invention discloses an actuator three-speed control box, comprising a three-speed box upper cover body, a three-speed box body, a block, a micro switch, a connecting plate, an adjusting screw, an O-ring and a tightening nut. The three-speed box body is fixedly mounted at the bottom end of the three-speed box upper cover body, the three-speed box body is installed with a block, the micro switch is installed at the upper end of the block, and the tightening nut pre-tightens the O-ring during assembly to play a waterproof and anti-loosening role, thereby ensuring the sealing and waterproof properties between the adjusting screw and the box body and the box cover, and ensuring the overall service life. The O-ring pre-tightening design prevents the adjusting screw from loosening due to vibration during operation of the equipment, thereby significantly improving the reliability. When the micro switch acts too early or too late, the adjusting screw can be directly rotated with a screwdriver, and the connecting plate and the micro switch are driven to move up and down by the rotation of the adjusting screw, thereby adjusting the distance between the micro switch and the block, and adjusting the up and down positions of the micro switch to realize the control of the rotation angle of the actuator, so that it acts at the correct position.

Description

Technical Field

[0001] The invention relates to the technical field of air valve actuators, and in particular to a three-speed control box of an actuator. Background Art

[0002] The actuator on the air valve is the power to drive the air valve to work. It has three working states: fully open, half open, and fully closed. The micro switch controls the working states of the air valve fully open, half open, and fully closed respectively, and the three-speed control box is set to control the working state of the actuator. The existing three-speed control box structure is unreasonable. The box body is usually a semi-enclosed structure with poor waterproof sealing performance. When the box body is installed underground or in a harsh environment with high humidity, water will enter the box body, which can easily cause failure of the components in the box body and affect the service life; and when the micro switch in the box body acts too early or too late, the box cover needs to be completely opened. The micro switch is opened for adjustment, and the adjustment is relatively complicated and difficult. CN201920956772.0 discloses a micro switch with stroke and action force adjustment functions. The adjustment washer is installed in the cavity formed by the slide rod and the adjustment screw. The micro-motion stroke can be adjusted by selecting the thickness of a single adjustment washer and increasing or decreasing the number of adjustment washers. However, the accuracy of the micro-motion stroke adjustment is poor, and the number of adjustment washers needs to be continuously increased or decreased to achieve the best fitting position. The operation is extremely cumbersome. Therefore, technical personnel in this field are urgently needed to design a new actuator three-speed control box. Summary of the invention

[0003] The problem to be solved by the present invention is that a tightening nut pre-tightens an O-ring during assembly, which can play a role in waterproofing and preventing loosening, thereby ensuring the sealing and waterproofness between the adjusting screw and the box body and the box cover, and ensuring the overall service life. The O-ring pre-tightening design not only makes the protection level reach above IP55, but also prevents the adjusting screw from loosening due to the vibration when the equipment is working, so that the reliability is significantly improved; when the microswitch acts too early or too late, the adjusting screw can be directly rotated with a screwdriver, and the rotation of the adjusting screw drives the connecting plate and the microswitch to move up and down, thereby adjusting the distance between the microswitch and the block, and adjusting the up and down position of the microswitch can realize the control of the rotation angle of the actuator, so that the actuator three-speed control box can act in the correct position.

[0004] In order to solve the above problems, the present invention provides an actuator three-speed control box, a three-speed box upper cover body, a three-speed box body, a block, a microswitch, a connecting plate, an adjusting screw, an O-ring and a tightening nut, the three-speed box body is fixedly installed at the bottom end of the three-speed box upper cover body, a block is installed in the three-speed box body, a microswitch is installed on the upper end of the block, one end of the block is crimped with the contact of the microswitch so that it controls the action of the actuator motor, one end of the microswitch is provided with a connecting plate and is hinged thereto, the connecting plate is in an arc-shaped structure, the adjusting screw extends downward from the through hole at the upper end of the three-speed box upper cover body to the interface at the other end of the connecting plate, the adjusting screw rotates to drive the connecting plate and the microswitch to move up and down, the adjusting screw and the through hole at the upper end of the three-speed box upper cover body are equipped with O-rings, and a tightening nut is sleeved on the part of the adjusting screw arranged in the three-speed box body.

[0005] Preferably, a three-gear box rotating shaft is installed inside the three-gear box body, and one end of the three-gear box rotating shaft is transmission-connected to the stopper.

[0006] Preferably, the three-gear box rotating shaft passes through the through hole at the bottom of the three-gear box body and extends downward to the outside, and one end of the three-gear box rotating shaft is provided with a block protruding inwardly.

[0007] Preferably, the air valve blade shaft sleeve is arranged at the inner end of the three-speed box rotating shaft, the actuator rotating shaft sleeve is arranged at the outer ends of the air valve blade shaft and the three-speed box rotating shaft, and the actuator fastening nut passes through the three-speed box rotating shaft, the air valve blade shaft, and the actuator rotating shaft to connect the three-speed box rotating shaft, the air valve blade shaft, and the actuator rotating shaft.

[0008] Preferably, there are at least three micro switches.

[0009] Preferably, a cable connector is installed at one end of the three-speed box body, and a cable assembly is installed in the cable connector.

[0010] The above structure has the following beneficial effects:

[0011] The bottom end of the upper cover body of the three-gear box of the present invention is fixedly equipped with a three-gear box body, and the sealing of the box body and the box cover is achieved through the box body plus the box cover integral package structure, the adjusting screw extends downward from the through hole on the upper end of the three-gear box upper cover body to the interface at the other end of the connecting plate, and an O-ring is installed at the through hole on the upper end of the adjusting screw and the upper end of the three-gear box upper cover body, and a tightening nut is sleeved on the part of the adjusting screw arranged in the box body of the three-gear box, and the tightening nut pre-tightens the O-ring during assembly, which can play a role of waterproofing and preventing loosening, thereby ensuring the sealing and waterproofing between the adjusting screw and the box body and the box cover, and ensuring the overall service life, the O-ring pre-tightening design not only makes the protection level reach above IP55, but also prevents the adjusting screw from loosening due to the vibration when the equipment is working, so that the reliability is significantly improved. Improvement: a block is installed in the box body of the three-block box, and a micro switch is installed on the upper end of the block. One end of the block is crimped with the contact of the micro switch to control the movement of the actuator motor. A connecting plate is provided at one end of the micro switch and is hinged therewith. The connecting plate has an arc-shaped structure, and an adjusting screw extends downward from a through hole at the upper end of the upper cover of the three-block box to an interface at the other end of the connecting plate. When the micro switch acts too early or too late, the adjusting screw can be directly rotated with a screwdriver, and the connecting plate and the micro switch can be driven up and down by rotating the adjusting screw, thereby adjusting the distance between the micro switch and the block. The upper and lower positions of the micro switch can be adjusted to realize the control of the rotation angle of the actuator, so that it acts in the correct position. The installation and connection are convenient and reliable, and there is no need to open the box cover for adjustment, which is extremely simple and reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the three-speed control box of the actuator of the present invention.

[0013] Figure 2 It is a side view of the three-speed control box of the actuator of the present invention.

[0014] Figure 3 It is a schematic diagram of the internal structure of the three-speed control box of the actuator of the present invention.

[0015] Figure 4 It is a side view of the micro switch and the stopper.

[0016] In the figure: 1-three-speed box upper cover, 2-three-speed box body, 3-block, 4-micro switch, 5-connecting plate, 6-adjusting screw, 7-O-ring, 8-tightening nut, 9-three-speed box rotating shaft, 10-block, 11-air valve blade shaft, 12-actuator rotating shaft, 13-actuator fastening nut, 14-cable connector, 15-cable assembly. DETAILED DESCRIPTION

[0017] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments.

[0018] 4. An actuator three-speed control box, a three-speed box upper cover body 1, a three-speed box body 2, a block 3, a micro switch 4, a connecting plate 5, an adjusting screw 6, an O-ring 7 and a tightening nut 8. The three-speed box upper cover body 1 is fixedly mounted with the three-speed box body 2 at the bottom end, a block 3 is installed in the three-speed box body 2, a micro switch 4 is installed on the upper end of the block 3, one end of the block 3 is crimped with the contact of the micro switch 4 to control the actuator motor to move, one end of the micro switch 4 is provided with a connecting plate 5 and is hinged therewith, the connecting plate 5 is in an arc-shaped structure, the adjusting screw 6 extends downward from the through hole at the upper end of the three-speed box upper cover body 1 to the interface at the other end of the connecting plate 5, the adjusting screw 6 rotates to drive the connecting plate 5 and the micro switch 4 to move up and down, the adjusting screw 6 and the through hole at the upper end of the three-speed box upper cover body 1 are equipped with O-rings 7, and a tightening nut 8 is sleeved on the part of the adjusting screw 6 arranged in the three-speed box body 2.

[0019] A three-gear box rotating shaft 9 is installed inside the three-gear box body 2 , and one end of the three-gear box rotating shaft 9 is transmission-connected to the stopper 3 .

[0020] The three-gear box rotating shaft 9 passes through the bottom through hole of the three-gear box body 2 and extends downward to the outside. A block 10 protruding inward is provided at one end of the three-gear box rotating shaft 9.

[0021] The damper blade shaft 11 is sleeved on the inner end of the three-gear box rotating shaft 9, the actuator rotating shaft 12 is sleeved on the outer ends of the damper blade shaft 11 and the three-gear box rotating shaft 9, the actuator fastening nut 13 passes through the three-gear box rotating shaft 9, the damper blade shaft 11, and the actuator rotating shaft 12 to connect the three-gear box rotating shaft 9, the damper blade shaft 11, and the actuator rotating shaft 12.

[0022] There are at least three micro switches 4 , and a cable connector 14 is installed at one end of the three-speed box body 2 , and a cable assembly 15 is installed in the cable connector 14 .

[0023] In order to facilitate understanding of the above technical solution of the present invention, the above technical solution of the present invention is described in detail below through specific installation and use methods.

[0024] The specific working process is as follows: first, the operator connects the actuator rotating shaft 12, the air valve blade shaft 11 and the three-gear box rotating shaft 9 through the actuator fastening nut 13 to ensure that the three rotate synchronously when the actuator is working, and installs an O-ring 7 at the through hole of the adjusting screw 6 and the upper end of the upper cover body 1 of the three-gear box, and sets the adjusting screw 6 on the part inside the box body 2 of the three-gear box and tightens the nut 8. The O-ring 7 is pre-tightened during assembly. When the rotating shaft 9 of the three-gear box drives the block 3 to rotate, the block 3 presses the contact of the microswitch 4 to control the action of the actuator motor. When the microswitch 4 acts too early or too late, the adjusting screw 6 is directly rotated with a screwdriver. The connecting plate 5 and the microswitch 4 are driven up and down by the rotation of the adjusting screw 6, so as to adjust the distance between the microswitch 4 and the block 3. By adjusting the up and down position of the microswitch 4, the rotation angle of the actuator can be controlled to make it act in the correct position.

[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0026] It should be noted that, in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0027] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features invented herein.

Claims

1. A three-speed control box for an actuator, characterized in that: A three-speed box upper cover (1), a three-speed box body (2), a stopper (3), a micro switch (4), a connecting plate (5), an adjusting screw (6), an O-ring (7) and a tightening nut (8), wherein the three-speed box upper cover (1) is fixedly mounted with the three-speed box body (2), a stopper (3) is mounted inside the three-speed box body (2), a micro switch (4) is mounted on the upper end of the stopper (3), one end of the stopper (3) is pressed against the contact of the micro switch (4) to control the action of the actuator motor, and one end of the micro switch (4) is provided with a connecting plate (5) and is connected to the stopper (3). The connecting plate (5) is hingedly connected, the connecting plate (5) is in an arc-shaped structure, the adjusting screw (6) extends downward from the through hole at the upper end of the upper cover body (1) of the three-speed box to the interface at the other end of the connecting plate (5), thereby fixing the adjusting screw (6) and the connecting plate (5), and the adjusting screw (6) rotates to drive the connecting plate (5) and the micro switch (4) to move up and down, an O-ring (7) is installed at the through hole at the upper end of the adjusting screw (6) and the upper end of the upper cover body (1) of the three-speed box, and a tightening nut (8) is sleeved on the part of the adjusting screw (6) arranged in the box body (2) of the three-speed box; A three-gear box rotating shaft (9) is arranged inside the three-gear box body (2), and one end of the three-gear box rotating shaft (9) is drivingly connected to the stopper (3); The three-gear box rotating shaft (9) passes through the bottom through hole of the three-gear box body (2) and extends downward to the outside, and an inwardly protruding block (10) is provided at one end of the three-gear box rotating shaft (9), and at least three micro switches (4) are provided; When the three-speed box rotating shaft (9) drives the stopper (3) to rotate, the stopper (3) presses the contact of the micro switch (4) to control the action of the actuator motor. When the micro switch (4) acts too early or too late, the adjusting screw (6) is directly rotated with a screwdriver. The adjusting screw (6) is rotated to drive the connecting plate (5) and the micro switch (4) to move up and down, thereby adjusting the distance between the micro switch (4) and the stopper (3). By adjusting the up and down position of the micro switch (4), the rotation angle of the actuator can be controlled to make it act at the correct position.

2. The actuator three-speed control box according to claim 1, characterized in that: The damper blade shaft (11) is sleeved on the inner end of the three-speed box rotating shaft (9); the actuator rotating shaft (12) is sleeved on the outer ends of the damper blade shaft (11) and the three-speed box rotating shaft (9); and the actuator fastening nut (13) passes through the three-speed box rotating shaft (9), the damper blade shaft (11), and the actuator rotating shaft (12), thereby connecting the three-speed box rotating shaft (9), the damper blade shaft (11), and the actuator rotating shaft (12).

3. The actuator three-speed control box according to claim 1, characterized in that: A cable connector (14) is installed at one end of the three-speed box body (2), and a cable assembly (15) is installed in the cable connector (14).

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