A push rod motor transmission mechanism

Abstract

This utility model discloses a push rod motor transmission mechanism. The drive element drives a gear transmission component to rotate, which in turn drives a lead screw to rotate. This causes the lead screw nut to move linearly, and consequently, the telescopic rod slides linearly relative to the outer casing, thus driving an external device connected to the telescopic rod to perform linear reciprocating motion. During this movement, a photoelectric switch can detect the telescopic rod's movement distance in real time and send a signal to the PCB board. When the movement distance reaches a set value, the PCB board controls the drive element to stop, thereby precisely controlling the telescopic rod's displacement and achieving accurate positioning.

Description

Technical Field

[0001] This utility model relates to the field of motor transmission, specifically to a push rod motor transmission mechanism. Background Technology

[0002] Currently available telescopic pole motors require a large load in limited spaces, and given the high requirements for displacement accuracy and waterproofing in their application scenarios, a large transmission ratio is needed to convert the motor's speed into torque. Most existing telescopic pole motors are conventional linear reciprocating structures, only capable of inching retraction and extension functions. That is, the operator holds down a button, and the drive device moves continuously in one direction; once the button is released, the movement stops immediately. The extension distance at the output end is manually controlled by the operator, making precise positioning impossible. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model provides a push rod motor transmission mechanism, which can solve the problem that the telescopic rod motor in the prior art cannot be accurately positioned.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: A push rod motor transmission mechanism is provided, including a photoelectric switch, a housing, and a drive component, a gear transmission component, a lead screw, a telescopic rod, and a PCB board, all located within the housing. The stator of the drive component is installed inside the housing, the mover of the drive component is connected to the input end of the gear transmission component, the output end of the gear transmission component is connected to the rod body of the lead screw, and both the gear transmission component and the rod body of the lead screw are rotatably installed inside the housing. The nut of the lead screw is connected to the telescopic rod, the telescopic rod is slidably connected to the housing, and one end of the telescopic rod extends out of the housing. The photoelectric switch is used to detect the moving distance of the telescopic rod, the output end of the photoelectric switch is unidirectionally electrically connected to the input end of the PCB board, and the output end of the PCB board is unidirectionally electrically connected to the input end of the drive component.

[0005] As a further improvement to the above technical solution, the gear transmission component includes a first gear, a second gear, a third gear, and a fourth gear that mesh in sequence. The first gear is connected to the moving part of the driving component, and the fourth gear is connected to the rod body of the lead screw.

[0006] As a further improvement to the above technical solution, the lead screw body is rotatably connected to the housing through a first bearing and a second bearing, with the first bearing and the second bearing located on the upper and lower sides of the fourth gear, respectively.

[0007] As a further improvement to the above technical solution, a groove is provided on the rod body of the lead screw, the groove is located on the upper side of the fourth gear, and a retaining spring is engaged at the groove.

[0008] As a further improvement to the above technical solution, the first gear is a motor gear, and the second gear and the third gear are both double-toothed.

[0009] As a further improvement to the above technical solution, the telescopic rod is sleeved on the outside of the lead screw body, the outer shell is provided with a through hole, and the telescopic rod extends out of the through hole; a bushing is provided at the through hole, and the telescopic rod is slidably connected to the bushing.

[0010] As a further improvement to the above technical solution, an end cap is provided at the outward end of the bushing, and the end cap is sealed to the outer shell through a first sealing ring.

[0011] As a further improvement to the above technical solution, a connector is provided at one end of the telescopic rod extending out of the outer shell. One end of the connector is threadedly connected to the telescopic rod, and the other end is connected to an external device. The connector is sealed to the telescopic rod through a second sealing ring.

[0012] As a further improvement to the above technical solution, the outer shell includes a bracket, a cover, and a housing with an opening at one end. The cover covers the opening of the housing, and the bracket is sealed and installed at the opening of the housing by a third sealing ring. The stator of the driving component is fixedly installed on the bracket, the gear transmission component is rotatably installed on the cover and the bracket, the rod of the lead screw is rotatably connected to both the cover and the housing, and one end of the telescopic rod extends out of the housing.

[0013] As a further improvement to the above technical solution, the driving component includes a DC brushed motor.

[0014] The beneficial effects of this invention are as follows: the drive element drives the gear transmission component to rotate, which in turn drives the lead screw to rotate. This causes the lead screw nut to move linearly, and the telescopic rod to slide linearly relative to the outer casing, thereby driving the external device connected to the telescopic rod to perform linear reciprocating motion. During the movement, the photoelectric switch can detect the moving distance of the telescopic rod in real time and send a signal to the PCB board. When the moving distance reaches the set value, the PCB board controls the drive element to stop, thus precisely controlling the displacement of the telescopic rod and achieving accurate positioning. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the push rod motor transmission mechanism provided in a preferred embodiment of the present invention;

[0017] Figure 2This is an exploded view of the push rod motor transmission mechanism provided in a preferred embodiment of the present invention;

[0018] Figure 3 yes Figure 2 Enlarged view of section A;

[0019] Figure 4 This is a cross-sectional view of the push rod motor transmission mechanism provided in a preferred embodiment of this utility model.

[0020] Reference numerals: 1. Outer shell; 2. Drive component; 3. Gear transmission component; 4. Lead screw; 5. Telescopic rod; 6. PCB board; 11. Through hole; 12. Bushing; 13. End cap; 14. First sealing ring; 15. Bracket; 16. Cover; 17. Shell; 18. Third sealing ring; 31. First gear; 32. Second gear; 33. Third gear; 34. Fourth gear; 41. First bearing; 42. Second bearing; 43. Groove; 44. Snap ring; 51. Connector; 52. Second sealing ring. Detailed Implementation

[0021] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / connections involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. For example, fixed connections / fixed installations can use screw connections, bolt connections, pin connections, key connections, adhesive connections, mortise and tenon connections, welding, riveting, etc., as needed. For detachable connections, screw connections, bolt connections, threaded connections, snap-fit ​​connections, mortise and tenon connections, Velcro connections, etc., can be used as needed. The various technical features in this utility model can be combined interactively without contradicting each other.

[0022] Please see Figure 1-3This utility model provides a push rod motor transmission mechanism, including a photoelectric switch, a housing 1, and a drive component 2, a gear transmission component 3, a lead screw 4, a telescopic rod 5, and a PCB board 6, all located within the housing 1. The stator of the drive component 2 is installed inside the housing 1, the mover of the drive component 2 is connected to the input end of the gear transmission component 3, and the output end of the gear transmission component 3 is connected to the rod body of the lead screw 4. Both the gear transmission component 3 and the rod body of the lead screw 4 are rotatably installed inside the housing 1. The nut of the lead screw 4 is connected to the telescopic rod 5, the telescopic rod 5 is slidably connected to the housing 1, and one end of the telescopic rod 5 extends out of the housing 1. The mover of the drive component 2 drives the gear transmission component 3 to rotate, which in turn drives the rod body of the lead screw 4 to rotate, thereby causing the nut of the lead screw 4 to move linearly and causing the telescopic rod 5 to slide linearly relative to the housing 1, thus driving an external device connected to the telescopic rod 5 to perform linear reciprocating motion.

[0023] A photoelectric switch is used to detect the moving distance of the telescopic rod 5. The output terminal of the photoelectric switch is unidirectionally electrically connected to the input terminal of the PCB board 6, and the output terminal of the PCB board 6 is unidirectionally electrically connected to the input terminal of the drive unit 2. During the movement, the photoelectric switch can detect the moving distance of the telescopic rod 5 in real time and send a signal to the PCB board 6. When the moving distance reaches the set value, the PCB board 6 controls the drive unit 2 to stop, thereby precisely controlling the displacement of the telescopic rod 5 and achieving accurate positioning.

[0024] In this embodiment, please refer to Figure 3 The gear transmission component 3 includes a first gear 31, a second gear 32, a third gear 33, and a fourth gear 34 that mesh in sequence. The first gear 31 is connected to the mover of the drive component 2, and the fourth gear 34 is connected to the rod body of the lead screw 4. The power of the drive component 2 is transmitted sequentially from the first gear 31, the second gear 32, the third gear 33, and the fourth gear 34, and then the fourth gear 34 drives the rod body of the lead screw 4 to rotate. A large transmission ratio is achieved through the cooperation of each gear, and the multi-stage gear transmission can reduce the speed to obtain a larger output torque.

[0025] The lead screw 4 is rotatably connected to the housing 1 via the first bearing 41 and the second bearing 42. The first bearing 41 and the second bearing 42 are located on the upper and lower sides of the fourth gear 34, respectively. The first bearing 41 and the second bearing 42 can work together to provide greater support rigidity and stability, so as to prevent the lead screw 4 from undergoing large bending deformation and vibration due to the meshing force of the gear transmission component 3.

[0026] The lead screw 4 has a groove 43 on its body. The groove 43 is located on the upper side of the fourth gear 34, and a retaining spring 44 is engaged in the groove 43. The retaining spring 44 is installed in the machined groove 43 and hardly occupies any additional axial space to prevent space restriction problems. The retaining spring 44 can effectively restrict the axial degree of freedom of the lead screw 4, ensuring that it can only rotate in the preset position and will not cause accidental axial movement, thus preventing the lead screw 4 from axially moving.

[0027] In this embodiment, the first gear 31 is a motor gear, and the second gear 32 and the third gear 33 are both double gears. Double gears can provide two different transmission ratios on the same shaft to achieve multi-stage speed change and improve space utilization. The first gear 31 is made of stainless steel to withstand the large torque brought by the drive component 2; the second gear 32 and the third gear 33 are both made of plastic, which has sound-absorbing properties and can effectively reduce noise.

[0028] The telescopic rod 5 is sleeved on the outside of the lead screw 4. The outer shell 1 is provided with a through hole 11, and the telescopic rod 5 extends out of the through hole 11. A bushing 12 is provided at the through hole 11, and the telescopic rod 5 is slidably connected to the bushing 12. The bushing 12 can reduce the friction of the telescopic rod 5 during reciprocating motion, improve mechanical efficiency, and provide a precise and stable support surface for the telescopic rod 5, ensuring that the telescopic rod 5 can move in the correct position and guarantee transmission accuracy.

[0029] Please see Figure 2 , 4 The bushing 12 has an end cap 13 on its outward-facing end. The end cap 13 is sealed to the outer shell 1 through a first sealing ring 14. The bushing 12, end cap 13, and first sealing ring 14 are welded together by ultrasonic welding. The first sealing ring 14 is deformed by squeezing it in space, so that the product meets the waterproof requirements during operation.

[0030] The telescopic rod 5 has a connector 51 at one end extending from the outer casing 1. One end of the connector 51 is threaded to the telescopic rod 5, and the other end is connected to an external device. The connector 51 is sealed to the telescopic rod 5 through a second sealing ring 52. The connector 51 facilitates the installation of the external device, and the second sealing ring 52 ensures the waterproofness of the telescopic rod 5, further improving the waterproof performance of the product.

[0031] Please see Figure 2The outer casing 1 includes a bracket 15, a cover 16, and a housing 17 with an opening at one end. The cover 16 covers the opening of the housing 17. The bracket 15 is sealed at the opening of the housing 17 by a third sealing ring 18 to ensure the waterproofness between the bracket 15 and the housing 17 and prevent water from entering the housing 17. The overall structure meets the IP67 waterproof rating. The stator of the drive component 2 is fixedly mounted on the bracket 15. The gear transmission component 3 is rotatably mounted on the cover 16 and the bracket 15. The rod of the lead screw 4 is rotatably connected to both the cover 16 and the housing 17. Specifically, the rod of the lead screw 4 is rotatably connected to the cover 16 and the housing 17 by a first bearing 41 and a second bearing 42, respectively. One end of the telescopic rod 5 extends out of the housing 17. The cover 16 and the housing 17 together enclose a cavity. The bracket 15 is used to provide stable support to fix the components in the cavity.

[0032] In this embodiment, the drive unit 2 includes a DC brushed motor, which has the advantages of excellent speed regulation performance and large starting torque. It does not require complex control circuits and can achieve wide-range and smooth speed regulation by simply adjusting the power supply voltage, which meets the application scenarios of variable speed products. At the same time, it can output high torque instantly when powered on, and has fast starting speed and large load.

[0033] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A push rod motor transmission mechanism, characterized in that: The device includes a photoelectric switch, a housing, and a drive component, a gear transmission component, a lead screw, a telescopic rod, and a PCB board, all located within the housing. The stator of the drive component is installed inside the housing, the mover of the drive component is connected to the input end of the gear transmission component, the output end of the gear transmission component is connected to the rod body of the lead screw, and both the gear transmission component and the rod body of the lead screw are rotatably installed inside the housing. The nut of the lead screw is connected to the telescopic rod, the telescopic rod is slidably connected to the housing, and one end of the telescopic rod extends out of the housing. The photoelectric switch is used to detect the moving distance of the telescopic rod. The output end of the photoelectric switch is unidirectionally electrically connected to the input end of the PCB board, and the output end of the PCB board is unidirectionally electrically connected to the input end of the driving component.

2. The push rod motor transmission mechanism according to claim 1, characterized in that: The gear transmission component includes a first gear, a second gear, a third gear, and a fourth gear that mesh sequentially. The first gear is connected to the moving part of the driving component, and the fourth gear is connected to the rod body of the lead screw.

3. The push rod motor transmission mechanism according to claim 2, characterized in that: The lead screw is rotatably connected to the housing via a first bearing and a second bearing, with the first bearing and the second bearing located on the upper and lower sides of the fourth gear, respectively.

4. The push rod motor transmission mechanism according to claim 2, characterized in that: The lead screw has a groove on its body, which is located on the upper side of the fourth gear, and a retaining spring is engaged in the groove.

5. The push rod motor transmission mechanism according to claim 2, characterized in that: The first gear is a motor gear, and the second and third gears are both double-toothed.

6. The push rod motor transmission mechanism according to claim 1, characterized in that: The telescopic rod is sleeved on the outside of the lead screw body. The outer shell is provided with a through hole, and the telescopic rod extends out of the through hole. A bushing is provided at the through hole, and the telescopic rod is slidably connected to the bushing.

7. The push rod motor transmission mechanism according to claim 6, characterized in that: The bushing is provided with an end cap at the outward end, and the end cap is sealed to the outer shell by a first sealing ring.

8. The push rod motor transmission mechanism according to claim 1, characterized in that: The telescopic rod has a connector at one end extending from the outer casing. One end of the connector is threaded to the telescopic rod, and the other end is connected to an external device. The connector is sealed to the telescopic rod via a second sealing ring.

9. The push rod motor transmission mechanism according to claim 1, characterized in that: The outer casing includes a bracket, a cover, and a housing with an opening at one end. The cover covers the opening of the housing, and the bracket is sealed to the opening of the housing by a third sealing ring. The stator of the drive component is fixedly mounted on the bracket, the gear transmission component is rotatably mounted on the cover and the bracket, the rod of the lead screw is rotatably connected to both the cover and the housing, and one end of the telescopic rod extends out of the housing.

10. The push rod motor transmission mechanism according to any one of claims 1-9, characterized in that: The driving component includes a DC brushed motor.

Images