An externally friction driven telescopic arm mechanism

Abstract

The utility model relates to mechanical equipment technical field, concretely discloses a kind of external friction drive type telescopic arm mechanism, comprising: fixed mechanism and moving mechanism;The fixed mechanism includes shell, setting on the shell motor, the drive friction wheel driven by motor, and the locking mechanism for the shell is fixed to external device;The moving mechanism is arm structure, its surface is provided with the friction surface corresponding with the drive friction wheel;The drive friction wheel is pressed on the friction surface of the moving mechanism, and the motor passes through the friction between drive friction wheel and friction surface, the device is directly pressed in the friction surface of moving mechanism by adopting external friction drive principle, drive arm body linear motion using friction, replaces traditional hydraulic or electric cylinder built-in drive mode, significantly simplifies overall structure and realizes miniaturization and light weight.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment technology, specifically to an external friction-driven telescopic arm mechanism. Background Technology

[0002] Currently, in fields such as automated inspection, high-altitude operations, and cable inspection, boom drive mechanisms commonly employ built-in drive solutions such as hydraulic drives or electric push rods. These solutions typically embed hydraulic cylinders, piston assemblies, or motors and lead screw structures entirely within the boom body, directly driving the boom segments through hydraulic pressure or motor torque to achieve telescopic movement. This structural form is commonly found in construction machinery, power line inspection robots, and overhead contact line maintenance devices.

[0003] However, the aforementioned built-in drive methods have obvious limitations. For example, the hydraulic system requires a pump station, oil tank, and complex pipelines, resulting in a bulky and heavy overall structure that is difficult to meet the needs of portable operation. Although the electric cylinder drive simplifies power transmission, its linear actuator still occupies a large internal space, which restricts the compact design of the boom structure. The overall drive system is completely built into the boom, which not only increases the cross-sectional size of the boom but also makes maintenance and repair difficult, resulting in insufficient adaptability in space-constrained application scenarios. Utility Model Content

[0004] The purpose of this invention is to provide an external friction-driven telescopic arm mechanism to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an external friction-driven telescopic arm mechanism, comprising: a fixing mechanism and a moving mechanism; the fixing mechanism includes a housing, a prime mover disposed on the housing, a driving friction wheel driven by the prime mover, and a locking mechanism for fixing the housing to an external device; the moving mechanism is an arm-shaped structure, the surface of which is provided with a friction surface corresponding to the driving friction wheel; the driving friction wheel is pressed against the friction surface of the moving mechanism, and the prime mover drives the moving mechanism to move linearly relative to the fixing mechanism through the friction force between the driving friction wheel and the friction surface.

[0006] In one possible implementation, the fixing mechanism further includes a plurality of limiting wheels for providing lateral support; Multiple limiting wheels are rotatably mounted on the housing, with their wheel surfaces in contact with the side of the moving mechanism.

[0007] In one feasible implementation, the fixing mechanism further includes a floating locking structure; The floating locking structure includes an elastic element. The driving friction wheel is connected to the housing via a mounting base. The elastic element acts on the mounting base to provide a preload force to the driving friction wheel toward the moving mechanism, so as to maintain a stable pressing state between the driving friction wheel and the friction surface.

[0008] In one feasible implementation, the fixing mechanism further includes a linkage mechanism; The linkage mechanism is a gear transmission pair or a belt transmission mechanism. The linkage mechanism is connected between the output shaft of the prime mover and the rotating shaft of the driving friction wheel, and is used to change the direction of power transmission.

[0009] In one feasible implementation, the moving mechanism is composed of at least two single-section arms connected in sequence; two adjacent single-section arms are hinged together by a pivot, so that the single-section arms can deflect relative to each other; and functional modules are provided at the ends of the two single-section arms.

[0010] In one feasible implementation, the locking mechanism is a flange connection plate, clamp, or fixture.

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: This device adopts the principle of external friction drive, directly pressing the drive friction wheel in the fixed mechanism against the friction surface of the moving mechanism, and using friction to drive the linear movement of the arm body, replacing the traditional hydraulic or electric cylinder built-in drive method, significantly simplifying the overall structure and achieving miniaturization and weight reduction; the floating locking structure automatically maintains a constant clamping force between the drive wheel and the friction surface through elastic elements, which not only ensures transmission efficiency but also compensates for wear gaps; the limit wheel group provides lateral constraint on the moving mechanism to ensure the accuracy of the motion trajectory; the multi-section articulated single-section arm design achieves multi-angle deflection through the rotating shaft, combined with functional modules that can be adapted to various working tools, enabling the mechanism to have flexible working posture adjustment capabilities in confined spaces, ultimately achieving a comprehensive improvement in portability, structural compactness, motion accuracy, and environmental adaptability. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the fixing mechanism of this utility model; Figure 3 This is a schematic diagram of the moving mechanism of this utility model.

[0013] In the diagram: 1. Housing, 2. Prime mover, 3. Drive friction wheel, 4. Locking mechanism, 5. Friction surface, 6. Limit wheel, 7. Floating locking structure, 8. Linkage mechanism, 9. Rotating shaft, 10. Functional module, 11. Single arm. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1 to 3 This utility model provides a technical solution: an external friction-driven telescopic arm mechanism, comprising: a fixed mechanism and a moving mechanism; the fixed mechanism includes a housing 1, a prime mover 2 disposed on the housing 1, a driving friction wheel 3 driven by the prime mover 2, and a locking mechanism 4 for fixing the housing 1 to an external device; the moving mechanism is an arm-shaped structure, and its surface is provided with a friction surface 5 corresponding to the driving friction wheel 3; the driving friction wheel 3 presses against the friction surface 5 of the moving mechanism, and the prime mover 2 drives the moving mechanism to move linearly relative to the fixed mechanism through the friction force between the driving friction wheel 3 and the friction surface 5.

[0016] It should be noted that after the locking mechanism 4 securely fixes the housing 1 to the external device, the prime mover 2 starts and outputs rotational power; the power generated by the prime mover 2 is directly transmitted to the drive friction wheel 3, causing it to rotate; the rotating drive friction wheel 3, through its tight pressing contact with the friction surface 5 of the moving mechanism, converts the rotational motion into frictional force acting on the friction surface 5; this frictional force continuously drives the moving mechanism, causing it to move linearly relative to the fixed mechanism that has been fixed.

[0017] In some examples, the fixing mechanism further includes multiple limiting wheels 6 for providing lateral support; the multiple limiting wheels 6 are rotatably mounted on the housing 1, and their wheel surfaces contact the sides of the moving mechanism.

[0018] It should be noted that when the moving mechanism is driven to perform linear motion, its side continuously contacts the wheel surfaces of multiple rotatable limit wheels 6 mounted on the housing 1 and generates relative rolling. During this process, the limit wheels 6 provide continuous lateral support by bearing the contact force from the side of the moving mechanism, thereby effectively constraining the lateral offset and deflection trend of the moving mechanism on the motion trajectory and ensuring the accuracy and stability of its linear motion.

[0019] In some examples, the fixing mechanism further includes a floating locking structure 7; the floating locking structure 7 includes an elastic element, the driving friction wheel 3 is connected to the housing 1 via a mounting base, the elastic element acts on the mounting base to provide a preload force to the driving friction wheel 3 toward the moving mechanism, so as to maintain a stable pressing state between the driving friction wheel 3 and the friction surface 5.

[0020] It should be noted that during operation, when the driving friction wheel 3 presses against the friction surface 5 of the moving mechanism, the elastic element continuously applies an elastic preload force towards the moving mechanism to the mounting base. The elastic element can be a compression spring, tension spring, disc spring, or elastic washer, etc. This preload force is transmitted to the driving friction wheel 3 through the mounting base, allowing it to adaptively conform to the friction surface 5. When the friction surface 5 develops a small gap due to movement or wear, the elastic element drives the mounting base to cause the driving friction wheel 3 to make a slight floating displacement, thereby automatically compensating for the gap change and dynamically maintaining a stable and continuous pressing state between the driving friction wheel 3 and the friction surface 5. The preload force provided by the floating locking structure ensures that the friction force between the driving friction wheel 3 and the friction surface 5 is always greater than the maximum resistance experienced by the moving mechanism during operation, thus preventing transmission slippage.

[0021] In some examples, the fixing mechanism further includes a linkage mechanism 8; the linkage mechanism 8 is a gear transmission pair or a belt transmission mechanism, and the linkage mechanism 8 is connected between the output shaft of the prime mover 2 and the rotating shaft 9 of the driving friction wheel 3, and is used to change the direction of power transmission.

[0022] It should be noted that during operation, the output shaft of the prime mover 2 inputs rotational power to the linkage mechanism 8; when a gear transmission pair is used, power is transmitted and the rotation direction is changed through the contact of the meshing gear teeth; when a belt transmission mechanism is used, power transmission and direction conversion are achieved through the friction transmission between the belt and the pulley; finally, the power converted by the linkage mechanism 8 is transmitted to the rotating shaft 9 of the driving friction wheel 3, driving it to rotate in the desired direction.

[0023] In some examples, the moving mechanism is further composed of at least two single-section arms 11 connected in sequence; two adjacent single-section arms 11 are hinged together by a pivot 9, so that the single-section arms 11 can deflect relative to each other; and functional modules 10 are provided at the ends of the two single-section arms 11.

[0024] It should be noted that during operation, when the working posture needs to be adjusted, the adjacent single-section arms 11 can rotate relative to each other around the pivot 9 between them; the hinge effect of the pivot 9 allows the single-section arms 11 to deflect at different angles in different planes; the deflection movement of the single-section arms 11 enables the entire moving mechanism to achieve a wider working space, and ultimately drives the functional module 10 set on the end single-section arm 11 to reach the required spatial position and working posture. Among them, functional module 10 can be a detection module: used to carry optical or sensing equipment, including surveillance cameras, infrared thermal imagers, laser scanners, ultrasonic flaw detectors or insulator detection sensors.

[0025] It can also be a task module: used to perform physical operations, including mechanical grippers, spray nozzles, cleaning brushes, grinding heads, or welding actuators.

[0026] Alternatively, it could be a connection module: used to achieve mechanical or electrical connections, including standard mechanical interface boards, quick-change connectors, or electrical connectors. Functional module 10, through the specific equipment it carries, enables the telescopic boom mechanism to adapt to various application scenarios such as high-altitude inspection, equipment maintenance, and on-site operations.

[0027] In some examples, the locking mechanism 4 is further described as a flange connection plate, clamp, or fixture.

[0028] It should be noted that during installation, when using a flange connection plate, its mating surface is placed against the surface of the external equipment and fasteners are used to pass through the connection holes on the plate body for fixation; when using a clamp, the clamp is wrapped around the perimeter of the external equipment and the locking mechanism is tightened to cause the clamp to contract radially; when using a fixture, the opening and closing degree of its clamping arms is adjusted to clamp it onto the surface of the external equipment, and the locking device is activated to generate clamping force, thereby achieving a reliable connection between the equipment and the external load-bearing structure.

[0029] In the description of this utility model, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," and "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. At the same time, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "fixed installation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction relationship between two elements. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An external friction-driven telescopic boom mechanism, characterized in that, include: Fixed mechanisms and moving mechanisms; The fixing mechanism includes a housing, a prime mover mounted on the housing, a drive friction wheel driven by the prime mover, and a locking mechanism for fixing the housing to an external device. The moving mechanism is an arm-shaped structure, and its surface is provided with a friction surface corresponding to the driving friction wheel; The driving friction wheel is pressed against the friction surface of the moving mechanism, and the prime mover drives the moving mechanism to move linearly relative to the fixed mechanism through the friction between the driving friction wheel and the friction surface. The fixing mechanism also includes a floating locking structure; The floating locking structure includes an elastic element. The driving friction wheel is connected to the housing via a mounting base. The elastic element acts on the mounting base to provide a preload force to the driving friction wheel toward the moving mechanism, so as to maintain a stable pressing state between the driving friction wheel and the friction surface.

2. The external friction-driven telescopic arm mechanism according to claim 1, characterized in that: The fixing mechanism also includes multiple limiting wheels for providing lateral support; Multiple limiting wheels are rotatably mounted on the housing, with their wheel surfaces in contact with the side of the moving mechanism.

3. The external friction-driven telescopic arm mechanism according to claim 1, characterized in that: The fixing mechanism also includes a linkage mechanism; The linkage mechanism is a gear transmission pair or a belt transmission mechanism. The linkage mechanism is connected between the output shaft of the prime mover and the rotating shaft of the driving friction wheel, and is used to change the direction of power transmission.

4. The external friction-driven telescopic arm mechanism according to claim 1, characterized in that: The moving mechanism is composed of at least two single-section arms connected in sequence; The two adjacent single-section arms are hinged together by a pivot, allowing the single-section arms to deflect relative to each other; Functional modules are provided at the ends of the two single-section arms.

5. The external friction-driven telescopic arm mechanism according to claim 1, characterized in that: The locking mechanism is a flange connection plate, clamp, or fixture.

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