Large-elongation telescopic rod based on flexible round belt driving

Abstract

The invention discloses a large-elongation telescopic rod based on flexible round belt driving, which comprises a plurality of pipe joints, a flexible round belt, a driving mechanism, a gear mechanism and a base, each pipe joint is a round pipe with taper, each pipe joint is sequentially sleeved and connected, the top end of each pipe joint is in interference fit with a limiting interface, the sleeved pipe joints are horizontally arranged on the base, and the flexible round belt is arranged on the base. The pipe joints are jointly filled with a flexible round belt, and the foremost end of the flexible round belt is fixedly connected with the top of the pipe joint located at the topmost end. The gear mechanism comprises a first gear, a second gear and a third gear, the driving mechanism is used for controlling the third gear to rotate, the first gear is meshed with the third gear and the second gear at the same time, the first gear and the second gear are symmetrically arranged on the two sides of the pipe joint, and friction wheels are arranged on the lower side of the first gear and the lower side of the second gear correspondingly. And the flexible round belt is clamped between the two friction wheels. The invention aims to provide the telescopic rod with high elongation, low energy consumption and low mass, and the telescopic rod is widely applied to various small equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of telescopic rods, in particular to a large-elongation telescopic rod based on flexible round belt driving. BACKGROUND

[0002] As a key component for realizing linear telescopic function, telescopic rods are widely used in many fields such as automatic equipment, intelligent machinery, medical devices, etc., and their performance directly affects the overall operation efficiency and application range of the equipment. At present, there are three ways for telescopic rods, namely, pneumatic, hydraulic and electric. The pneumatic and hydraulic types rely on gas and liquid sources and complex pipelines, and have large device volume and complex structure, which is difficult to adapt to the small space layout inside small devices. The industrial commonly used electric telescopic rod realizes telescoping by multiple screw rods, which is limited by the lead of the screw rod and the mechanical structure. This way has slow telescoping speed, large weight and high energy consumption, and cannot meet the needs of small devices for fast response, lightweight and low power consumption. When the number of telescopic rod designs increases, the length increases, and the mechanical structure for telescoping also increases, which is difficult to miniaturize. Since there is no telescopic rod that can simultaneously meet the requirements of high elongation, high telescoping speed, low energy consumption and low mass, it cannot match the development needs of small, high-performance devices such as micro detection instruments and portable medical auxiliary devices. Therefore, there is an urgent need for a telescopic rod that has high elongation, high telescoping speed, low energy consumption and low mass, and can be widely used in various small devices. SUMMARY

[0003] The present application aims to overcome the shortcomings of the prior art and provide a telescopic rod that has high elongation, high telescoping speed, low energy consumption and low mass, and can be widely used in various small devices.

[0004] To achieve the above-mentioned purpose, the present application is realized by the following technical solutions:

[0005] A large-elongation telescopic rod based on flexible round belt driving, comprising a plurality of pipe sections, a flexible round belt, a driving mechanism, a gear mechanism and a base, each pipe section is a tapered circular pipe, each pipe section is connected in turn and is in interference fit with a limiting interface at the top end, the connected pipe sections are horizontally arranged on the base, the flexible round belt is filled in each pipe section, and the front end of the flexible round belt is fixedly connected to the top of the topmost pipe section; the gear mechanism comprises a first gear, a second gear and a third gear, the driving mechanism is used for controlling the rotation of the third gear, the first gear is engaged with the third gear and the second gear, and the first gear and the second gear are symmetrically arranged on both sides of the pipe section, the lower side of each of the first gear and the second gear is provided with a friction wheel, and the flexible round belt is clamped between the two friction wheels.

[0006] Further, the taper ratio of each pipe section and the limiting interface is 1:50 to 1:10.

[0007] Further, the outermost pipe section is externally fixed with a pipe clamp, and the pipe clamp is fixedly connected with the base.

[0008] Further, the driving mechanism is a steering wheel connected with the third gear.

[0009] Further, the top side of the base is provided with a top plate, and the left side plate and the right side plate are fixedly arranged on the two sides of the friction wheel between the base and the top plate.

[0010] Compared with the prior art, the present application has the following beneficial effects:

[0011] The present application utilizes the injection and extraction of the flexible round belt to drive the telescopic expansion of the multi-section round pipe, and still can control the multi-section pipe section under the condition of reducing the mechanical structure, so as to realize the large telescopic rate of the telescopic rod. The high tensile strength of the flexible round belt can ensure the stability of the tension during contraction, the rod-like buckling characteristics can ensure the effective transmission of the axial pressure during elongation, and the reliability of the telescopic driving of the flexible round belt is ensured. The rotation speed of the friction wheel is controlled through the gear transmission, so as to realize the accurate control of the conveying speed of the flexible round belt, and then the telescopic precision of the telescopic rod is controlled. The pipe section and the limiting interface both utilize the high-precision centering characteristics of the small taper, so as to solve the problems of poor rigidity and inaccurate positioning caused by the gap between the cylindrical surfaces of the traditional multi-stage telescopic pipe. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic view of the present application;

[0013] Figure 2 It is a side view of the present application;

[0014] Figure 3 It is a schematic view of the internal structure of the present application;

[0015] Figure 4 It is a schematic view of the friction wheel and the flexible round belt in the present application;

[0016] Figure 5 It is a schematic view of the telescopic rod in the present application in the contracted state;

[0017] Figure 6 It is a schematic view of the telescopic rod in the present application in the elongated state;

[0018] Figure 7 It is a state diagram of the flexible round belt in the telescopic rod in the present application.

[0019] REFERENCE SIGNS:

[0020] 1- first end pipe section, 2- middle pipe section, 3- end pipe section, 4- limiting interface, 5- flexible round belt, 6- first gear, 7- second gear, 8- third gear, 9- pipe clamp, 10- base, 11- driving mechanism, 12- friction wheel, 13- left side plate, 14- top plate, 15- right side plate. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] like Figures 1 to 6 As shown, a high elongation telescopic rod based on flexible circular belt drive includes multiple tube sections, a flexible circular belt 5, a drive mechanism, a gear mechanism, and a base 10. Each tube section is a tapered circular tube, and each tube section is sequentially connected and has an interference fit limit interface 4 at the top. The assembled tube sections are horizontally placed on the base 10. Each tube section is filled with a flexible circular belt 5, and the front end of the flexible circular belt 5 is fixedly connected to the top of the tube section at the top. The gear mechanism includes a first gear 6, a second gear 7, and a third gear 8. The drive mechanism is used to control the rotation of the third gear 8. The first gear 6 meshes with both the third gear 8 and the second gear 7, and the first gear 6 and the second gear 7 are symmetrically arranged on both sides of the tube section. Friction wheels 12 are provided on the lower side of both the first gear 6 and the second gear 7, and the flexible circular belt 5 is sandwiched between the two friction wheels 12.

[0023] The taper ratio of each pipe section and the limiting interface 4 is 1:50 to 1:10. Both the pipe section and the limiting interface 4 utilize the high-precision centering characteristics of small taper to solve the problems of poor rigidity and inaccurate positioning caused by the gap between cylindrical surfaces in traditional multi-stage telescopic pipes.

[0024] The outermost pipe section is fixedly fitted with a pipe clamp 9, which is fixedly connected to the base 10. That is, at least two pipe clamps 9 are provided on the outside of the first pipe section 1 to keep the first pipe section 1 horizontally fixed on the base 10.

[0025] The telescopic rod retracts as follows: the drive mechanism 11 drives the third gear 8 to rotate clockwise, which in turn drives the first gear 6 to rotate counterclockwise and the second gear 7 to rotate clockwise, causing the two friction wheels 12 on the lower side to rotate simultaneously. The friction wheel assembly 12 uses the radial extrusion force generated by the groove meshing to pull the flexible circular belt 5 out of the telescopic tube assembly. When the flexible circular belt 5 is pulled out, its length inside the telescopic tube shortens and straightens, generating tension. Under the action of tension, the end tube section 3 retracts into the middle tube section 2, and the middle tube section 2 retracts into the first end tube section 1 until the limiting interface 4 of the adjacent circular tube contacts, completing the retraction.

[0026] The telescopic rod extends as follows: the drive mechanism 11 drives the third gear 8 to rotate counterclockwise, which in turn drives the first gear 6 to rotate clockwise and the second gear 7 to rotate counterclockwise, causing the two friction wheels 12 on the lower side to rotate simultaneously. The friction wheel assembly 12 utilizes the radial extrusion force generated by the meshing of the grooves to inject the flexible circular belt 5 into the telescopic tube assembly. At this time, as... Figure 7As shown, the flexible round belt 5 only has small bending deformation under the extrusion of the friction wheel 12 and the constraint of the inner wall of each pipe section, and macroscopically maintains a rod-like shape, and the length gradually increases with the injection, which can withstand the axial pressure acting on the end pipe section 3, and push the end pipe section 3 to extend along the middle pipe section 2, and the middle pipe section 2 to extend along the head pipe section 1, and finally realize the overall elongation of the telescopic rod.

[0027] The small taper structure of each pipe section can realize high-precision centering and positioning between adjacent round pipes by using the taper surface self-centering principle. During the telescoping process, the taper surface contact can automatically compensate for the slight radial deviation to ensure the coaxiality when nesting. When the flexible round belt 5 is injected, the end pipe section 3 is pushed outwards by the axial thrust of the rod-like round belt, and the middle pipe section 2 is synchronously extended with the end pipe section 3. In this process, the taper surfaces of adjacent pipe sections gradually fit along the axial direction, and only a small axial displacement is required to complete the radial self-adjustment, quickly realize gapless fitting, ensure the overall rigidity of the telescopic pipe after elongation, and avoid shaking caused by the gap. When the flexible round belt 5 is extruded, the end pipe section 3 is retracted into the middle pipe section 2 under tension, and the middle pipe section 2 is retracted into the head pipe section 1, and the gap between the taper surfaces reappears with the retraction action, reducing the retraction resistance, and at the same time, the limiting interface 4 of the adjacent pipe sections is in contact, and the precise reset after retraction is realized through taper positioning.

[0028] The elongation and telescoping rate of the telescopic rod are related to the number of telescopic rod stages and the length of each round pipe. The telescoping rate increases with the increase of the number of telescopic pipe stages, and the elongation increases with the increase of the number of telescopic pipe stages or the increase of the length of each pipe section. The number of telescopic pipe stages and the length of each pipe section can be adaptively adjusted according to the requirements of the target elongation, installation space limitation and other practical application scenarios to meet the use requirements under different working conditions.

[0029] The top side of the base 10 is provided with a top plate 14, and the left side plate 13 and the right side plate 15 are fixedly arranged on both sides of the friction wheel 12 between the base 10 and the top plate 14. The base 10, the top plate 14, the left side plate 13 and the right side plate 15 jointly form a stable rectangular frame for supporting the internal adjusting assembly.

[0030] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A large elongation telescopic rod based on a flexible round belt drive, characterized in that: The utility model relates to a flexible pipe joint device, including a plurality of pipe sections, flexible round belt (5), drive mechanism (11), gear mechanism and base (10), each pipe section is the pipe with taper, each pipe section is connected in turn and is all in the top end interference fit limit interface (4), the pipe section after being connected in turn is arranged horizontally on the base (10), each pipe section is filled with flexible round belt (5) in common, the foremost end of flexible round belt (5) is fixedly connected with the top of the pipe section in the most top end, the gear mechanism includes first gear (6), second gear (7) and third gear (8), the drive mechanism (11) is used for controlling third gear (8) rotation, first gear (6) is engaged with third gear (8), second gear (7) simultaneously and first gear (6) and second gear (7) are symmetrically arranged on both sides of the pipe section, the downside of first gear (6) and second gear (7) is provided with friction wheel (12), and flexible round belt (5) is clamped between two friction wheels (12).

2. A large elongation telescopic rod based on flexible round belt drive according to claim 1, characterized in that: The taper ratio of each pipe section and the limit interface (4) is 1:50 to 1:

10.

3. A large elongation telescopic rod driven by a flexible round belt according to claim 2, characterized in that: The outer portion of the outermost pipe section is fixedly sleeved with a pipe clamp (9), and the pipe clamp (9) is fixedly connected with the base (10).

4. The large elongation telescopic rod driven by flexible round belt according to claim 1, characterized in that: The drive mechanism (11) is a rudder connected with the third gear (8).

5. The large elongation telescopic rod driven by flexible round belt according to claim 1, characterized in that: The top side of the base (10) is provided with a top plate (14), and the base (10) and the top plate (14) are fixedly provided with a left side plate (13) and a right side plate (15) on both sides of the friction wheel (12), respectively.

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