A guyed actuator

Abstract

The application discloses a pull wire actuator and relates to the technical field of actuators, which comprises a shell, a transmission worm, a driving device, a coil spring and a top rod. The transmission worm is provided with a plurality of helical teeth at one end and a first clamping groove at the other end. The driving device is used for driving the transmission worm to rotate. The coil spring comprises a coil spring shell and a coil spring body arranged in the coil spring shell. The outer clamping head of the coil spring body is fixedly connected with the coil spring shell, and the inner clamping head of the coil spring body abuts against the first clamping groove. The top rod is provided with a helical groove in the inside. The helical teeth and the helical groove are in sliding fit. A fixing piece is fixedly sleeved with one end of the top rod in the shell. The fixing piece comprises two sliders which are respectively located on the two sides of the top rod. One sliding groove corresponding to each slider is arranged in the shell. The slider and the corresponding sliding groove are in sliding fit. The pull wire actuator has the advantages of simple structure, good reliability, automatic reset function and low cost.

Description

Technical Field

[0001] This invention relates to the field of actuator technology, and in particular to a cable actuator. Background Technology

[0002] A cable actuator is a mechanical device typically used for remote operation of machines or equipment. It usually consists of components such as a spring, a cable, and a linkage. By compressing and releasing the spring, the cable is pulled or released, thereby controlling the movement and resetting of the machine or equipment.

[0003] The existing draw-wire actuator has an unreasonable structural design, resulting in a large size, which makes it inconvenient to use when the space is small. In addition, the existing draw-wire actuator is noisy during use and cannot meet the requirements. Summary of the Invention

[0004] The purpose of this invention is to provide a wire actuator to solve the problems existing in the prior art, simplify the structure of the wire actuator to reduce its size, and reduce the noise generated by the wire actuator during operation to meet the usage requirements.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides a wire actuator, comprising:

[0007] case;

[0008] A transmission worm gear, one end of which is provided with a plurality of helical teeth, the transmission worm gear is disposed inside the housing and can rotate relative to the housing about the axis of the transmission worm gear, and the other end of the transmission worm gear is provided with a first slot;

[0009] A drive device is disposed within the housing, the drive device being used to drive the transmission worm gear to rotate;

[0010] A coil spring is disposed within the housing. The coil spring includes a coil spring shell and a coil spring body disposed within the coil spring shell. The outer locking head of the coil spring body is fixedly connected to the coil spring shell. The coil spring shell is fixedly connected to or locked to the housing. The inner locking head of the coil spring body abuts against the first locking groove.

[0011] A push rod has a hollow portion coaxial with itself, with an opening at one end. A helical groove is provided on the circumferential inner wall of the hollow portion. A transmission worm gear extends into the hollow portion, and all the helical teeth slide in engagement with the helical groove. The push rod portion is located within a housing. A fixing member is fixedly fitted at one end of the push rod within the housing. The fixing member includes two sliders located on either side of the push rod. A sliding groove is provided within the housing for each slider, and the slider slides in engagement with the corresponding sliding groove. A push rod connector is fixedly provided at one end of the push rod extending out of the housing, and the push rod connector is used to connect to one end of a pull wire.

[0012] Preferably, the drive device is an electric motor equipped with an overload protector, a transmission gear is fixedly sleeved on the transmission worm, and a drive gear that meshes with the transmission gear is fixedly mounted on the output shaft of the drive device.

[0013] Preferably, the spring housing is further provided with a limiting plate for preventing the spring body from moving relative to the spring housing along the axial direction of the spring body.

[0014] Preferably, it also includes a noise reduction component, which includes two snap-fit ​​components, two upper soft pads and one lower soft pad. One end of each of the two snap-fit ​​components is fixedly connected to the lower soft pad. One upper soft pad is fixedly disposed at the other end of the snap-fit ​​component, and the other upper soft pad is fixedly disposed at the other end of the other snap-fit ​​component. Each slider is provided with a second slot. One snap-fit ​​component snaps into one second slot, and the other snap-fit ​​component snaps into the other second slot.

[0015] A first limiting block is fixed inside the housing, and a second limiting block is fixed in each of the sliding grooves. The first limiting block is closer to the coil spring than the second limiting block. The silencing component is located between the first limiting block and the second limiting block. The upper soft pad can abut against the second limiting block, and the lower soft pad can abut against the first limiting block.

[0016] Preferably, the first limiting block is provided with a through hole, through which the transmission worm passes.

[0017] Preferably, the housing is divided into a first half-housing and a second half-housing, and the first half-housing and the second half-housing are joined together to form the housing; the housing is also provided with a connector, and the driving device is electrically connected to the connector.

[0018] The present invention achieves the following technical effects compared to the prior art:

[0019] The pull-wire actuator of this invention has a simple structure, high reliability, automatic reset function, and low cost. The housing integrates connectors, which are compact, easy to install, securely fixed, and not easily detached. Built-in noise reduction components result in low operating noise and good comfort. An overload protector provides overload protection for the motor, extending its service life. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the cable actuator of the present invention;

[0022] Figure 2 This is an exploded view of the cable actuator of the present invention;

[0023] Figure 3 This is a schematic diagram of the transmission worm gear in the cable actuator of the present invention;

[0024] Figure 4 This is a schematic diagram of the coil spring structure in the cable actuator of the present invention;

[0025] Figure 5 This is a partial structural schematic diagram of the cable actuator of the present invention;

[0026] Figure 6 This is a partial structural schematic diagram of the cable actuator of the present invention;

[0027] Figure 7 This is a schematic diagram of the top rod structure in the cable actuator of the present invention;

[0028] Figure 8 This is a schematic diagram of the silencer component in the cable actuator of the present invention;

[0029] The components are as follows: 1. Housing; 2. Top rod; 3. Top rod connector; 4. Connector; 5. Spring shell; 6. Spring body; 7. Transmission gear; 8. First slot; 9. First half-housing; 10. Drive device; 11. Fixing screw; 12. Drive gear; 13. Fixing component; 14. Silencing component; 1401. Upper soft pad; 1402. Snap-fit ​​component; 1403. Lower soft pad; 15. Second half-housing; 16. Transmission worm gear; 17. Helical gear; 18. Outer snap-fit ​​head; 19. Inner snap-fit ​​head; 20. Limiting plate; 21. First limiting block; 22. Slide groove; 23. Second limiting block; 24. Second slot. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] The purpose of this invention is to provide a wire actuator to solve the problems existing in the prior art, simplify the structure of the wire actuator to reduce its size, and reduce the noise generated by the wire actuator during operation to meet the usage requirements.

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figures 1-8 As shown, this embodiment provides a cable actuator, including a housing 1, a transmission worm gear 16, a drive device 10, a coil spring, a push rod 2, and a silencer 14.

[0034] The housing 1 is divided into a first half-housing 9 and a second half-housing 15. The first half-housing 9 and the second half-housing 15 are joined together to form the housing 1. The first half-housing 9 and the second half-housing 15 are connected by fixing screws 11. The housing 1 is also provided with connectors 4.

[0035] The transmission worm 16 has several helical teeth 17 at one end. The transmission worm 16 is disposed inside the housing 1 and can rotate relative to the housing 1 around the axis of the transmission worm 16. The other end of the transmission worm 16 is provided with a first slot 8.

[0036] The drive unit 10 is housed inside the housing 1 and is used to drive the transmission worm gear 16 to rotate. The drive unit 10 uses a motor and is equipped with an overload protector, which can extend the service life of the motor. A transmission gear 7 is fixedly sleeved on the transmission worm gear 16, and a drive gear 12 that meshes with the transmission gear 7 is fixedly mounted on the output shaft of the drive unit 10. The power supply pin of the drive unit 10 (i.e., the motor) is electrically connected to the connector 4.

[0037] The coil spring is disposed inside the housing 1. The coil spring includes a coil spring shell 5 and a coil spring body 6 disposed inside the coil spring shell 5. The outer locking head 18 of the coil spring body 6 is fixedly connected to the coil spring shell 5. The coil spring shell 5 is fixedly connected to or locked to the housing 1. The inner locking head 19 of the coil spring body 6 abuts against the first locking groove 8. A limiting plate 20 is also provided inside the coil spring shell 5 to prevent the coil spring body 6 from moving relative to the coil spring shell 5 along the axial direction of the coil spring body 6. The setting of the limiting plate 20 can ensure the stability of the coil spring position.

[0038] The push rod 2 has a hollow part coaxial with it, and the hollow part is open at one end of the push rod 2. The circumferential inner wall of the hollow part is provided with a spiral groove. The transmission worm 16 extends into the hollow part, and all the spiral teeth 17 slide with the spiral groove. The push rod 2 is located in the housing 1. The end of the push rod 2 located in the housing 1 is fixedly fitted with a fixing member 13. The fixing member 13 includes two sliders located on both sides of the push rod 2. The housing 1 is provided with a sliding groove 22 for each slider. The slider slides with the corresponding sliding groove 22. The end of the push rod 2 that extends out of the housing 1 is fixedly provided with a push rod connector 3. The push rod connector 3 is used to fix one end of the pull wire.

[0039] The noise-dampening component 14 includes two snap-fit ​​components 1402, two upper soft pads 1401, and one lower soft pad 1403. Each snap-fit ​​component 1402 is fixedly connected at one end to the lower soft pad 1403. One upper soft pad 1401 is fixed to the other end of a snap-fit ​​component 1402, and the other upper soft pad 1401 is fixed to the other end of another snap-fit ​​component 1402. Each slider has a second slot 24. One snap-fit ​​component 1402 engages with one second slot 24, and the other snap-fit ​​component 1402 engages with the other second slot 24. The fixing component 13 is made of plastic, while the snap-fit ​​components 1402, upper soft pads 1401, and lower soft pads 1403 are made of rubber. Multiple raised rubber stripes are provided on both the upper soft pads 1401 and lower soft pads 1403.

[0040] A first limiting block 21 is fixed inside the housing 1, and a second limiting block 23 is fixed in each sliding groove 22. The first limiting block 21 is closer to the coil spring than the second limiting block 23. The muffler 14 is located between the first limiting block 21 and the second limiting block 23. The upper soft pad 1401 can abut against the second limiting block 23, and the lower soft pad 1403 can abut against the first limiting block 21. A through hole is provided in the first limiting block 21, through which the transmission worm gear 16 passes. The push rod 2 is located between the two second limiting blocks 23. It should be noted that since the housing 1 is divided into a first half-housing 9 and a second half-housing 15, the first limiting block 21 is also divided into two halves, one half fixed to the first half-housing 9 and the other half fixed to the second half-housing 15.

[0041] The working principle of the cable actuator in this embodiment is as follows:

[0042] Looking from the coil spring toward the push rod 2, after the drive device 10, i.e., the motor, is powered on, it drives the drive gear 12 to rotate counterclockwise. The drive gear 12 drives the transmission gear 7 and the transmission worm 16 to rotate clockwise. When the transmission worm 16 rotates clockwise, the helical teeth 17 on the transmission worm 16 slide along the helical groove in the hollow part of the push rod 2. However, because the slider on the fixing part 13 outside the push rod 2 slides with the slide groove 22, and the length direction of the slide groove 22 is parallel to the axial direction of the push rod 2, the push rod 2 will not rotate, but will slide along the slide groove 22 toward the transmission gear 7 through the slider. At the same time, when the transmission worm 16 rotates, it will cause the coil spring to coil and compress through the contact between the first slot 8 and the inner slot 19. When the motor stops working, the compressed coil spring drives the gear and worm to rotate counterclockwise (looking from the coil spring toward the push rod 2), and the push rod 2 moves away from the transmission gear 7, and the push rod 2 returns to its original position.

[0043] Since the fastener 13 is fitted with a noise-reducing component 14, when the top rod 2 slides to the point where the lower soft pad 1403 contacts the first limiting block 21, or the upper soft pad 1401 contacts the second limiting block 23, the noise generation can be effectively reduced or even avoided, thus playing a role in noise reduction.

[0044] In the description of this invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A pull wire actuator, characterized by, The utility model provides a kind of drive device, including: Shell; Transmission worm, a plurality of helical teeth are provided at one end of the transmission worm, the transmission worm is arranged in the shell and can rotate around the axis of the transmission worm relative to the shell, a first clamping groove is provided at the other end of the transmission worm; Driving device arranged in the shell, the driving device is used to drive the transmission worm to rotate; Coil spring arranged in the shell, the coil spring includes coil spring shell and coil spring body arranged in the coil spring shell, the outer clamping head of the coil spring body is fixedly connected with the coil spring shell, the coil spring shell is fixedly connected or clamped with the shell, the inner clamping head of the coil spring body abuts against the first clamping groove; Ejector rod, a hollow part coaxial with the ejector rod is arranged in the ejector rod, and the hollow part is open at one end of the ejector rod, a spiral groove is arranged on the circumferential inner wall of the hollow part, the transmission worm partially extends into the hollow part, and all the helical teeth are in sliding fit with the spiral groove;The ejector rod is partially located in the shell, a fixing member is fixedly sleeved at one end of the ejector rod in the shell, the fixing member includes two sliders respectively located on both sides of the ejector rod, a sliding groove corresponding to each slider is arranged in the shell, the slider is in sliding fit with the corresponding sliding groove, and a ejector rod connector is fixedly arranged at one end of the ejector rod extending out of the shell, the ejector rod connector is used to be fixedly connected with one end of a pull wire.

2. The pull wire actuator of claim 1, wherein: The driving device adopts a motor, and the motor is provided with an overload protector, a transmission gear is fixedly sleeved on the transmission worm, and a driving gear meshing with the transmission gear is fixedly arranged on the output shaft of the driving device.

3. The pull wire actuator of claim 1, wherein: A limiting plate for preventing the coil spring body from moving relative to the coil spring shell along the axial direction of the coil spring body is further arranged in the coil spring shell.

4. The pull wire actuator of claim 1, wherein: It further includes a sound-absorbing member, the sound-absorbing member includes two clamping members, two upper soft pads and a lower soft pad, one end of each clamping member is fixedly connected with the lower soft pad, one upper soft pad is fixedly arranged at the other end of the clamping member, and the other upper soft pad is fixedly arranged at the other end of the other clamping member, a second clamping groove is arranged on each slider, one clamping member is clamped with one second clamping groove, and the other clamping member is clamped with the other second clamping groove; A first limiting block is fixedly arranged in the shell, a second limiting block is fixedly arranged in each sliding groove, and the first limiting block is closer to the coil spring than the second limiting block, the sound-absorbing member is located between the first limiting block and the second limiting block, the upper soft pad can abut against the second limiting block, and the lower soft pad can abut against the first limiting block.

5. The pull wire actuator of claim 4, wherein: A through hole is arranged in the first limiting block, and the transmission worm passes through the through hole.

6. The pull wire actuator of claim 1, wherein: The shell is divided into a first half shell and a second half shell, the first half shell and the second half shell are butted to form the shell, and a connector is further arranged on the shell, and the driving device is electrically connected with the connector.

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