An electric telescopic pole

Abstract

This utility model discloses an electric telescopic rod. An external device requiring position adjustment is mounted on a connector. Power is provided by a drive component, and a transmission component transmits this power to a push rod, causing it to move along a guide component. The guide component guides the push rod along its length, allowing it to slide relative to the housing, thus achieving the extension and retraction of the external device. Furthermore, an elastic element acts as a passive force compensation component, automatically adjusting the output force according to the push rod's extension / retraction position. This effectively counteracts the impact of the external device's load on the drive component, extending its lifespan. Additionally, in the event of a sudden drive component failure, the elastic element acts as a buffer, preventing the push rod from causing the external device to descend rapidly, ensuring safe operation.

Description

Technical Field

[0001] This utility model relates to the field of mechanical drives, specifically to an electric telescopic pole. Background Technology

[0002] Traditional electric telescopic poles generally use a screw and nut drive structure. Screw and nut drives suffer from significant sliding friction losses, especially during long-term operation or under high load conditions, where energy loss due to friction is even more pronounced, and the transmission efficiency is typically less than 80%. Furthermore, existing push rod mechanisms have significant shortcomings in load adaptability, particularly lacking effective protection mechanisms under sudden loads or overloads. Traditional designs can usually only withstand unidirectional force and are essentially unable to withstand tensile forces. Retraction relies primarily on the weight of the object being retracted, resulting in a heavy load on the power source, which is detrimental to extending the product's lifespan. Moreover, in the event of a sudden power outage, the object may suddenly fall, posing a danger. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, this utility model provides an electric telescopic pole that can solve the problems of the existing electric telescopic pole having a heavy power source load and falling rapidly when the power is cut off.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: An electric telescopic rod is provided, comprising a housing, a push rod, and a drive assembly. The push rod is slidably connected within the housing, and a connecting member extending out of the housing is provided on the push rod. A guide member is provided within the housing to guide the push rod to move along its own length direction. The drive assembly includes a drive member and a transmission member. The drive member provides power, and the transmission member transmits power to drive the push rod to move along the guide member. An elastic member is provided between the push rod and the housing, and the elastic member generates a reaction force after compression to support the push rod.

[0005] As a further improvement to the above technical solution, the driving component includes a motor and a worm gear, the stator of the motor is mounted on the push rod, and the rotor of the motor is connected to the worm gear; the transmission component includes a gear set and a rack, the gear set is rotatably mounted on the push rod, and the rack is fixedly mounted inside the housing, and the gear set meshes with both the worm gear and the rack.

[0006] As a further improvement to the above technical solution, the gear set includes a first gear, a second gear, and a third gear that are rotatably connected to the push rod. The second gear meshes with both the first gear and the third gear. The first gear meshes with the worm gear. The third gear meshes with the rack. The diameter of the second gear is larger than the diameter of the first gear.

[0007] As a further improvement to the above technical solution, both the first gear and the second gear are double gears. The first gear includes a helical gear and a first spur gear, and the second gear includes a second spur gear and a third spur gear, with the diameter of the second spur gear being larger than the diameter of the third spur gear. The worm meshes with the helical gear, the first spur gear meshes with the second spur gear, and the third spur gear meshes with the third gear.

[0008] As a further improvement to the above technical solution, the elastic element includes a gas spring, one end of which is fixedly connected to the push rod and the other end is fixedly connected to the housing.

[0009] As a further improvement to the above technical solution, a limiting groove is provided inside the housing, the length direction of the limiting groove is the same as the length direction of the push rod, one end of the push rod is provided with a limiting part, a guide block is provided on the limiting part, and the guide block gap is provided in the limiting groove.

[0010] As a further improvement to the above technical solution, the guide includes two slide grooves and rollers disposed on both sides of the push rod. Both slide grooves are disposed on the inner wall of the housing, and the length direction of both slide grooves is parallel to the length direction of the push rod. The rollers on both sides are respectively rotatably connected in the two slide grooves.

[0011] As a further improvement to the above technical solution, the guide component also includes a guide wheel and a guide groove. The surface of the push rod is provided with a mounting part, the guide wheel is rotatably mounted on the mounting part, the guide groove is provided on the inner wall of the housing, the length direction of the guide groove is parallel to the length direction of the push rod, and the guide wheel is rotatably connected in the guide groove.

[0012] As a further improvement to the above technical solution, a slot is provided on one side of the housing, the length direction of the slot is parallel to the length direction of the push rod, and the connector extends out of the slot and is spaced apart from the slot.

[0013] As a further improvement to the above technical solution, the connecting member includes a support arm, which is fixedly mounted on the push rod via a fixed shaft; the stator of the driving member is mounted on the support arm, and the transmission member is rotatably mounted on the support arm.

[0014] The beneficial effects of this utility model are as follows: the external device whose position needs to be adjusted is installed on the connector, the driving component provides power, the transmission component can transmit the power to the push rod and drive the push rod to move along the guide component, the guide component can guide the push rod to move along its own length direction, so that the push rod can slide relative to the housing, thereby realizing the extension and retraction of the external device; and the elastic component can act as a passive force compensation element, which can automatically adjust the output force according to the extension and retraction position of the push rod, effectively offsetting the influence of the load gravity of the external device on the driving component, and improving the life of the driving component. In addition, when the driving component suddenly fails, the elastic component can act as a buffer to prevent the push rod from driving the external device to descend rapidly, ensuring safe use. 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 structure of the electric telescopic rod provided in a preferred embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the electric telescopic rod provided in a preferred embodiment of the present invention;

[0018] Figure 3 This is a cross-sectional view of the electric telescopic rod near the guide block provided in a preferred embodiment of this utility model;

[0019] Figure 4 This is a cross-sectional view of the electric telescopic rod near the roller provided in a preferred embodiment of this utility model;

[0020] Figure 5 This is a cross-sectional view of the electric telescopic rod near the guide wheel provided in a preferred embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of the drive component and gear set provided in a preferred embodiment of the present invention;

[0022] Figure 7 This is a structural schematic diagram of the drive component and gear set provided in a preferred embodiment of the present invention from another angle.

[0023] Reference numerals: 1. Housing; 2. Push rod; 3. Drive assembly;

[0024] 11. Elastic component; 12. Guide component; 13. Limiting groove; 14. Guide groove; 15. Slide groove; 16. Slot hole; 21. Connecting component; 22. Limiting part; 23. Roller; 24. Mounting part; 31. Driving component; 32. Transmission component.

[0025] 111. Gas spring; 121. Rack; 211. Support arm; 212. Fixed shaft; 221. Guide block; 241. Guide wheel; 311. Motor; 312. Worm gear; 321. Gear set; 322. First gear; 323. Second gear; 324. Third gear; 325. Helical gear; 326. First spur gear; 327. Second spur gear; 328. Third spur gear. Detailed Implementation

[0026] 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.

[0027] Please see Figure 1-2 This utility model provides an electric telescopic rod, including a housing 1, a push rod 2, and a drive assembly 3. The push rod 2 is slidably connected inside the housing 1, and a connector 21 extending out of the housing 1 is provided on the push rod 2. The connector 21 is used to connect with an external device whose position needs to be adjusted. An elastic element 11 is provided between the push rod 2 and the housing 1. The elastic element 11 is used to generate a reaction force after compression to support the push rod 2. The drive assembly 3 is used to drive the push rod 2 to slide relative to the housing 1, thereby realizing the extension and retraction of the external device. The elastic element 11 can be used as a passive force compensation element, which can automatically adjust the output force according to the extension and retraction position of the push rod 2, effectively offsetting the influence of the load gravity of the external device on the drive assembly 3, and improving the life of the drive assembly 3. In addition, when the drive assembly 3 suddenly fails, the elastic element 11 can act as a buffer to prevent the push rod 2 from driving the external device to descend rapidly, ensuring safe use.

[0028] For details, please see Figure 2The housing 1 is provided with a guide 12, which is used to guide the push rod 2 to move along its own length direction. The drive assembly 3 includes a drive 31 and a transmission 32. The drive 31 is used to provide power, and the transmission 32 is used to transmit power to drive the push rod 2 to move along the guide 12. The coordinated arrangement of the drive 31, transmission 32 and guide 12 can achieve precise motion control and positioning, and improve the rigidity and stability of the system.

[0029] In this embodiment, the driving component 31 includes a motor 311 and a worm gear 312. The stator of the motor 311 is mounted on the push rod 2, and the rotor of the motor 311 is connected to the worm gear 312. The transmission component 32 includes a gear set 321 and a rack 121. The gear set 321 is rotatably mounted on the push rod 2, and the rack 121 is fixedly mounted inside the housing 1. The gear set 321 meshes with both the worm gear 312 and the rack 121. The motor 311 drives the worm gear 312, which in turn drives the gear set 321 to rotate. The gear set 321 and the rack 121 work together to extend and retract the push rod 2. The transmission load capacity of both components is high, and the energy loss is low.

[0030] More specifically, the gear set 321 includes a first gear 322, a second gear 323, and a third gear 324, all rotatably connected to the push rod 2. The second gear 323 meshes with both the first gear 322 and the third gear 324. The first gear 322 meshes with the worm gear 312, and the third gear 324 meshes with the rack 121. The three gears can form a multi-stage transmission, with the total transmission ratio being the product of each stage, which can achieve a large transmission ratio. Furthermore, the diameter of the second gear 323 is larger than the diameter of the first gear 322, and their transmission ratio is greater than 1, thereby increasing torque and reducing rotational speed.

[0031] Please see Figure 6-7 The first gear 322 and the second gear 323 are both double gears. The first gear 322 includes a helical gear 325 and a first spur gear 326, and the second gear 323 includes a second spur gear 327 and a third spur gear 328. The diameter of the second spur gear 327 is larger than the diameter of the third spur gear 328. The worm 312 meshes with the helical gear 325, the first spur gear 326 meshes with the second spur gear 327, and the third spur gear 328 meshes with the third gear 324. The double gear configuration can save the installation space of the gear shaft, making the entire gear transmission space more compact.

[0032] The elastic element 11 includes a gas spring 111. One end of the gas spring 111 is fixedly connected to the push rod 2, and the other end is fixedly connected to the housing 1. Within the stroke range, the output force of the gas spring 111 is relatively constant, thereby providing a stable support force to the push rod 2. Moreover, the gas spring 111 has a long extension and contraction life and is very durable.

[0033] Please see Figure 2-5The housing 1 has a limiting groove 13. The guide member 12 includes a guide wheel 241, a guide groove 14, two sliding grooves 15, and rollers 23 on both sides of the push rod. The guide groove 14 and the two sliding grooves 15 are located on the inner wall of the housing 1. The length directions of the limiting groove 13, the guide groove 14, and the two sliding grooves 15 are all parallel to the length direction of the push rod 2. One end of the push rod 2 has a limiting part 22, and a guide block 221 is provided on the limiting part 22. The guide block 221 is spaced within the limiting groove 13. The rollers 23 on both sides... The push rod 2 is rotatably connected to two sliding grooves 15 respectively. The surface of the push rod 2 is provided with a mounting part 24. The guide wheel 241 is rotatably mounted on the mounting part 24 and is rotatably connected to the guide groove 14. Through the cooperation of the guide block 221 and the limiting groove 13, the cooperation of the roller 23 and the sliding groove 15, and the cooperation of the guide wheel 241 and the guide groove 14, the movement of the push rod 2 can be guided, the movement trajectory of the push rod 2 can be restricted, and the friction between the push rod 2 and the housing 1 can be reduced, which further facilitates the extension and retraction of the push rod 2.

[0034] Please see Figure 1 To further restrict the movement of the push rod 2, a slot 16 is provided on one side of the housing 1. The length direction of the slot 16 is parallel to the length direction of the push rod 2. The connector 21 extends out of the slot 16 and is spaced apart from the slot 16. When the connector 21 abuts against both ends of the slot 16, the push rod 2 extends to its limit position to restrict the range of movement of the push rod 2.

[0035] Please refer to Figure 2. In this embodiment, the connector 21 includes a support arm 211, which is fixedly mounted on the push rod 2 via a fixed shaft 212. The stator of the drive component 31 is mounted on the support arm 211, and the transmission component 32 is rotatably mounted on the support arm 211. Specifically, the stator of the motor 311 is fixedly mounted on the support arm 211, and the first gear 322, the second gear 323, and the third gear 324 are all rotatably mounted on the support arm 211. The support arm 211 can provide stable support to external devices and facilitates the installation of external devices.

[0036] 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. An electric telescopic pole, characterized in that: The device includes a housing, a push rod, and a drive assembly. The push rod is slidably connected within the housing and has a connecting member extending out of the housing. A guide member is provided within the housing to guide the push rod to move along its length. The drive assembly includes a drive member and a transmission member. The drive member provides power, and the transmission member transmits power to move the push rod along the guide member. An elastic member is provided between the push rod and the housing to generate a reaction force to support the push rod after compression.

2. The electric telescopic pole according to claim 1, characterized in that: The driving component includes a motor and a worm gear. The stator of the motor is mounted on the push rod, and the rotor of the motor is connected to the worm gear. The transmission component includes a gear set and a rack. The gear set is rotatably mounted on the push rod, and the rack is fixedly mounted inside the housing. The gear set meshes with both the worm gear and the rack.

3. The electric telescopic pole according to claim 2, characterized in that: The gear set includes a first gear, a second gear, and a third gear, all rotatably connected to the push rod. The second gear meshes with both the first and third gears. The first gear meshes with the worm gear. The third gear meshes with the rack. The diameter of the second gear is larger than the diameter of the first gear.

4. The electric telescopic pole according to claim 3, characterized in that: Both the first gear and the second gear are double gears. The first gear includes a helical gear and a first spur gear, and the second gear includes a second spur gear and a third spur gear, with the diameter of the second spur gear being larger than the diameter of the third spur gear. The worm meshes with the helical gear, the first spur gear meshes with the second spur gear, and the third spur gear meshes with the third gear.

5. The electric telescopic pole according to claim 1, characterized in that: The elastic element includes a gas spring, one end of which is fixedly connected to the push rod, and the other end is fixedly connected to the housing.

6. The electric telescopic pole according to claim 1, characterized in that: The housing is provided with a limiting groove, the length direction of the limiting groove is the same as the length direction of the push rod, one end of the push rod is provided with a limiting part, and a guide block is provided on the limiting part, the guide block gap is provided in the limiting groove.

7. The electric telescopic pole according to claim 1, characterized in that: The guide includes two grooves and rollers disposed on both sides of the push rod. Both grooves are disposed on the inner wall of the housing, and the length direction of both grooves is parallel to the length direction of the push rod. The rollers on both sides are respectively rotatably connected in the two grooves.

8. The electric telescopic pole according to claim 1, characterized in that: The guide component also includes a guide wheel and a guide groove. The surface of the push rod is provided with a mounting part. The guide wheel is rotatably mounted on the mounting part. The guide groove is provided on the inner wall of the housing. The length direction of the guide groove is parallel to the length direction of the push rod. The guide wheel is rotatably connected in the guide groove.

9. The electric telescopic pole according to any one of claims 1-8, characterized in that: A slot is provided on one side of the housing, the length direction of the slot is parallel to the length direction of the push rod, and the connector extends out of the slot and is spaced apart from the slot.

10. The electric telescopic pole according to claim 9, characterized in that: The connector includes a support arm, which is fixedly mounted on the push rod via a fixed shaft; the stator of the drive component is mounted on the support arm, and the transmission component is rotatably mounted on the support arm.

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