A telescopic mechanism and a cutting device for a slope drainage hole

Abstract

The utility model relates to drainage hole cleaning technical field especially discloses a telescopic mechanism and cutting device of side slope drainage hole, including, main rod and sleeve group, sleeve group is set in the outside of main rod, sleeve group includes first sleeve and second sleeve, first sleeve is connected with second sleeve, this device passes through the thread pair drive design of first sleeve and second sleeve, effectively prevents sleeve group from accidental loosening because of external force, guarantees the axial precision of telescopic movement simultaneously. Through multistage hinged design of first L rod and second L rod, the axial displacement of sleeve group is converted into the radial adjustment of cutting blade. When sleeve group contracts, the exposed length change of hinged rod drives the increase of L type rod included angle, drives cutting blade to be close to drainage hole inner wall. The four-bar linkage mechanism not only realizes the accurate matching of cutting blade and pipe wall spacing, and the double-hinged structure of L type rod enhances the flexibility of blade cutting action, and can effectively cope with the cleaning demand of different forms of attachments such as weeds, tree roots and the like.

Description

Technical Field

[0001] This utility model relates to the field of drainage hole cleaning technology, and in particular to a telescopic mechanism and a cutting device for slope drainage holes. Background Technology

[0002] In the maintenance of slope drainage systems, traditional drainage hole cleaning tools generally suffer from the following technical defects: 1) The fixed length structure is difficult to adapt to the needs of drainage holes of different depths, resulting in poor operational adaptability; 2) The lack of a flexible transmission mechanism between the cutting components and the drive mechanism makes it easy for the cutting blade to get stuck or deflect when it comes into contact with the attachments on the pipe wall; Although there are cutting devices with a sleeve-type telescopic structure in the existing technology, they mostly use a single thread drive, lack a multi-stage hinge linkage adjustment mechanism, and have not been structurally optimized for the complex shape of the attachments (such as weeds and tree roots) on the inner wall of the drainage hole, resulting in low cutting efficiency and easy damage to the equipment. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to solve the problem of weeds, tree roots and other debris in the drainage holes that are difficult to clean.

[0004] The above-mentioned technical problems are solved by the following technical solution: This utility model proposes a telescopic mechanism, which includes a main rod and a sleeve assembly. The sleeve assembly is sleeved on the outside of the main rod. The sleeve assembly includes a first sleeve and a second sleeve, and the first sleeve and the second sleeve are screwed together.

[0005] In a preferred embodiment of the telescopic mechanism of this utility model: the main rod includes a handle, a connecting rod is fixedly connected to one side of the handle, and a hinge rod is fixedly connected to one end of the connecting rod.

[0006] In a preferred embodiment of the telescopic mechanism of this utility model: the diameter of the connecting rod is smaller than the diameter of the hinge rod, and a slot is provided on the connecting rod.

[0007] In a preferred embodiment of the telescopic mechanism described in this utility model: a limiting groove is formed on the outer wall of the hinge rod.

[0008] In a preferred embodiment of the telescopic mechanism of this utility model: one end of the first sleeve is provided with an internal thread, and one end of the second sleeve is provided with an external thread, wherein the internal thread of the first sleeve is screwed into the external thread of the second sleeve.

[0009] In a preferred embodiment of the telescopic mechanism of this utility model: the diameter of the first sleeve is larger than the diameter of the second sleeve, a limit strip is fixedly connected to the inner wall of the first sleeve, and a protrusion is fixedly connected to one end of the second sleeve.

[0010] In a preferred embodiment of the telescopic mechanism of this utility model: a first rubber sleeve is fixedly connected to the outer wall of one end of the internal thread of the first sleeve, and a second rubber sleeve is fixedly connected to the outer wall of one end of the smooth rod of the second sleeve.

[0011] The above-mentioned technical problems are also solved by the following technical solution: a cutting device for slope drainage holes, including a cutting blade, on which an L-shaped rod is hinged.

[0012] In a preferred embodiment of the slope drainage hole cutting device of the present invention: the L-shaped rod includes a first L-rod and a second L-rod, the bend of the first L-rod is hinged to the cutting blade, one end of the first L-rod is hinged to the hinge rod, and the other end of the first L-rod is hinged to the second sleeve.

[0013] In a preferred embodiment of the slope drainage hole cutting device of the present invention: the bend of the second L rod is hinged to the cutting blade, one end of the second L rod is hinged to the first L rod, and the other end of the second L rod is hinged to the second sleeve.

[0014] The beneficial effects of this utility model are as follows: This utility model achieves dynamic adjustment of the device length through the threaded transmission design of the first and second sleeves. The self-locking characteristic of the threaded transmission effectively prevents the sleeve assembly from accidentally loosening due to external forces during operation. Simultaneously, the nested guide structure formed by the stepped diameter design (the outer diameter of the first sleeve is larger than that of the second sleeve) ensures the axial accuracy of the telescopic movement. The total length of the main rod is designed to be greater than the length of the sleeve assembly, allowing the exposed extension section during retraction to accommodate drainage holes of different depths, thus overcoming the limitations of traditional fixed-length tools.

[0015] In terms of structural stability, an innovative dual-limiting mechanism is adopted: on the one hand, the groove-protrusion cooperation between the connecting rod and the second sleeve constrains axial displacement, retaining only rotational freedom to ensure the reliability of the telescopic action; on the other hand, the limiting strip on the inner wall of the first sleeve and the limiting groove on the outer wall of the hinge rod form mechanical interference to prevent cutting trajectory deviation caused by circumferential deflection. Simultaneously, the first and second rubber sleeves cover the threaded connection end and the handle area respectively, using high-friction coefficient rubber material to compensate for the hydrophilicity defects of the metal surface, significantly improving grip safety and reducing the risk of operational errors in humid environments.

[0016] Through the multi-stage hinged design of the first and second L-bars, the axial displacement of the sleeve assembly is converted into radial adjustment of the cutting blade. Specifically, when the sleeve assembly retracts, the change in the exposed length of the hinged rods drives the included angle of the L-shaped rods to increase, thereby moving the cutting blade closer to the inner wall of the drainage hole. This four-bar linkage not only achieves precise matching between the distance between the cutting blade and the pipe wall, but also reduces the probability of blade jamming through flexible transmission, making it particularly suitable for complex working conditions such as clearing pipes with irregular diameters or dense deposits. In addition, the double-hinged structure of the L-shaped rods enhances the flexibility of the blade's cutting action, effectively addressing the cleaning needs of different types of deposits such as weeds and tree roots. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments of this utility model will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this utility model and are not intended to limit the scope of this utility model. Wherein:

[0018] Figure 1 A schematic diagram of the overall structure of the telescopic mechanism and the cutting device for the slope drainage holes is shown.

[0019] Figure 2 A schematic diagram of the overall structure of the main rod of the telescopic mechanism and the cutting device for the slope drainage hole is shown.

[0020] Figure 3 A cross-sectional schematic diagram of the first sleeve of the telescopic mechanism and the cutting device for the slope drainage hole is shown.

[0021] Figure 4 A schematic diagram of the cross-sectional structure of the second sleeve of the telescopic mechanism and the cutting device for the slope drainage hole is shown. Detailed Implementation

[0022] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0023] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0024] Reference Figures 1-4This embodiment provides a telescopic mechanism and a cutting device for slope drainage holes, including a main rod 1 and a sleeve assembly 2. The sleeve assembly 2 is sleeved on the outside of the main rod 1. The sleeve assembly 2 includes a first sleeve 21 and a second sleeve 22, and the first sleeve 21 and the second sleeve 22 are screwed together.

[0025] Furthermore, one end of the first sleeve 21 is provided with an internal thread, and one end of the second sleeve 22 is provided with an external thread. The internal thread of the first sleeve 21 is screwed into the external thread of the second sleeve 22.

[0026] The telescopic mechanism utilizes the coordinated action of the main rod 1 and the sleeve assembly 2. The sleeve assembly 2, fitted around the main rod 1, consists of a first sleeve 21 and a second sleeve 22, which are threaded together for transmission. When either the first sleeve 21 or the second sleeve 22 rotates, the internal thread of the first sleeve 21 engages with the external thread of the second sleeve 22, causing relative rotation between them. The first sleeve 21 and the second sleeve 22 as a whole extend and retract along the axial direction of the main rod 1. Since the total length of the first sleeve 21 and the second sleeve 22 is designed to be less than the length of the main rod 1, the unencased extension of the main rod 1 is exposed when the sleeve assembly 2 retracts along the axial direction of the main rod 1, thus enabling dynamic adjustment of the length between the main rod 1 and the first sleeve 21. This ensures the adaptability of the cutting device under different working conditions and, through the self-locking characteristic of the threaded transmission, ensures the stability of the telescopic state.

[0027] Furthermore, the main rod 1 includes a handle 11, a connecting rod 12 is fixedly connected to one side of the handle 11, and a hinge rod 13 is fixedly connected to one end of the connecting rod 12. The diameter of the connecting rod 12 is smaller than the diameter of the hinge rod 13, and a slot 14 is provided on the connecting rod 12. A protrusion 26 is fixedly connected to one end of the second sleeve 22.

[0028] The structural stability is achieved through a composite connection between the handle 11 and the hinge rod 13, with the handle 11 connected to the hinge rod 13 in series via a connecting rod 12. The connecting rod 12 is fitted inside the second sleeve 22, its diameter being smaller than that of the hinge rod 13 to create a stepped transition, and an annular groove 14 is provided on the outer wall of the connecting rod 12; while a protrusion 26 matching the groove 14 is fixed at the end of the second sleeve 22. The hinge rod 13 is positioned and embedded inside the first sleeve 21, forming a spatial nested layout. This connection structure, through the operational design of the handle 11 extending from the end of the second sleeve 22, ensures both convenient gripping and operation, and through the limiting cooperation of the groove 14 and the protrusion 26, constrains the axial displacement (i.e., vertical relative movement) between the connecting rod 12 and the second sleeve 22, retaining only the rotational freedom (horizontal rotational movement) around the axis. This limiting design ensures the stability of the telescopic mechanism while providing the necessary degree of freedom for the rotational drive of the cutting device.

[0029] Furthermore, the diameter of the first sleeve 21 is larger than the diameter of the second sleeve 22, the inner wall of the first sleeve 21 is fixedly connected with a limit strip 25, and the outer wall of the hinge rod 13 is provided with a limit groove 15.

[0030] The nested telescopic function of the first sleeve 21 and the second sleeve 22 is achieved through a stepped diameter design: the outer diameter of the first sleeve 21 is larger than that of the second sleeve 22, and the two achieve relative displacement through a threaded pair. The axial guiding structure formed by the difference in diameter between the first sleeve 21 and the second sleeve 22 allows the first sleeve 21 and the second sleeve 22 to telescopically extend and retract along the axis of the main rod 1 during the screw-connected transmission process. The inner wall of the first sleeve 21 is provided with a limiting strip 25 along the axial direction, while the outer wall of the hinge rod 13 embedded inside the first sleeve 21 is correspondingly provided with a longitudinal limiting groove 15. The cooperation relationship between the limiting strip 25 and the limiting groove 15 is achieved through spatial nesting: when the sleeve assembly 2 moves, the limiting strip 25 slides axially along the limiting groove 15, which not only constrains the circumferential rotational freedom between the first sleeve 21 and the hinge rod 13, but also ensures that the two can only move linearly along the axial direction. This limiting structure effectively prevents deflection or jamming during the movement through mechanical interference, while ensuring the movement accuracy and operational stability of the cutting device under complex working conditions.

[0031] Specifically, a first rubber sleeve 23 is fixedly connected to the outer wall of one end of the internal thread of the first sleeve 21, and a second rubber sleeve 24 is fixedly connected to the outer wall of one end of the smooth rod of the second sleeve 22.

[0032] The first sleeve 21 has a first rubber sleeve 23 installed on the outer wall of its threaded connection end. This rubber sleeve forms a composite grip surface through the rigid combination of an elastic material and the metal sleeve. The second sleeve 22 has a corresponding second rubber sleeve 24 installed on the outer wall of its non-threaded smooth end. Both are made of rubber material with a high coefficient of friction. When the operator grips the sleeve, the threaded area covered by the first rubber sleeve 23 effectively eliminates the water film effect on the metal surface caused by rain or a humid working environment, while the second rubber sleeve 24 provides anti-slip protection for the gripping action of the handle 11 connection area. This double rubber sleeve design compensates for the hydrophilicity of the metal surface through material properties, significantly improving ergonomic safety during operation while ensuring the accuracy of threaded transmission. Especially in open-air operation scenarios such as cutting drainage holes on slopes, it can effectively prevent the risk of operational errors caused by slippery conditions.

[0033] Furthermore, the cutting blade 3 has an L-shaped rod 4 hinged to it.

[0034] The cutting assembly utilizes an L-shaped rod 4 for dynamic adjustment. The cutting blade 3 is telescopically connected to the main rod 1 and the sleeve assembly 2 via the L-shaped rod 4. One end of the L-shaped rod 4 is hinged to the cutting blade 3, while the other end is hinged to the main rod 1 or the first sleeve 21, forming a transmission mechanism. This allows the cutting blade 3 to adjust its distance from the drainage hole wall as the L-shaped rod 4 swings, enabling adaptive cutting of pipe wall deposits during drainage hole operations. When the device is inserted into the drainage hole, the cutting blade 3, supported by the L-shaped rod 4, effectively removes difficult-to-clean weeds, tree roots, and other biological deposits from the pipe. Its hinged design ensures flexibility in cutting action and enhances operational stability through mechanical transmission. This improves cutting efficiency and reduces the risk of blade jamming by allowing the cutting blade 3 to extend and retract via the L-shaped rod 4 structure, making it particularly suitable for slope drainage system maintenance under complex pipe diameter conditions.

[0035] Specifically, the L-shaped rod 4 includes a first L-rod 41 and a second L-rod 42. The first L-rod 41 is hinged to the cutting blade 3 at its bend, one end of the first L-rod 41 is hinged to the hinge rod 13, and the other end of the first L-rod 41 is hinged to the second sleeve 22. The second L-rod 42 is hinged to the cutting blade 3 at its bend, one end of the second L-rod 42 is hinged to the first L-rod 41, and the other end of the second L-rod 42 is hinged to the second sleeve 22.

[0036] Among them, one end of the first L-rod 41 is hinged to the hinge rod 13, the angle of the first L-rod 41 is hinged to the cutting blade 3, the other end of the first L-rod 41 is hinged to the first sleeve 21, one end of the second L-rod 42 is hinged to the first L-rod 41, the angle of the second L-rod 42 is hinged to the cutting blade 3, and the other end of the second L-rod 42 is hinged to the first sleeve 21.

[0037] The mechanism creates a spatial motion transition during the extension and retraction of the first sleeve 21 and the second sleeve 22: when the first sleeve 21 and the second sleeve 22 axially retract via threaded transmission, the exposed length of the hinge rod 13 increases, causing the first L-rod 41 and the second L-rod 42 to change angles under the constraints of the second sleeve 22 and the hinge rod 13, respectively. Specifically, the included angle between the first L-rod 41 and the second L-rod 42 gradually increases as the sleeves retract, while the vertical distance between the bend and the end decreases synchronously, thereby driving the cutting blade 3 to move radially towards the first sleeve 21. By adjusting the extension and retraction length of the sleeve assembly 2 (i.e., changing the distance between the first sleeve 21 and the end of the hinge rod 13), the relative position of the cutting blade 3 and the inner wall of the drainage channel can be precisely controlled, achieving adaptive cutting of attachments under different pipe diameter conditions. This adjustment mechanism based on multi-stage hinged transmission ensures both the flexibility and adaptability of the cutting action and achieves precise control of operating parameters through mechanical linkage.

[0038] When the device is in the fully retracted state, the first sleeve 21 and the second sleeve 22 are axially fixed by a threaded pair. The total length of the sleeve group 2 is less than the length of the main rod 1. At this time, the cutting blade 3 is located at the innermost position, maintaining the maximum distance from the inner wall of the drainage channel.

[0039] The limiting strip 25 and the limiting groove 15 form a circumferential constraint, and the slot 14 and the protrusion 26 eliminate axial displacement, ensuring the structural stability of the device during transportation and when it is not in use.

[0040] Rotating the first sleeve 21 or the second sleeve 22 drives the sleeve assembly 2 to extend and retract axially along the main rod 1 using the principle of threaded transmission (internal and external threads meshing). When the sleeve assembly 2 retracts, the unenclosed extension of the main rod 1 is gradually exposed, increasing the overall length of the device.

[0041] The rubber sleeves provide a non-slip operating surface: the first rubber sleeve 23 is used to rotate the first sleeve 21, and the second rubber sleeve 24 is used to hold the second sleeve 22 to prevent operating errors in wet environments.

[0042] As the sleeve assembly 2 retracts, the hinge rod 13 is simultaneously exposed due to the axial restraint of the connecting rod 12 and the second sleeve 22. The first L-bar 41 and the second L-bar 42 form a four-bar linkage under the constraint of the hinge rod 13 and the first sleeve 21.

[0043] As the sleeve assembly 2 continues to retract, the angle between the first L rod 41 and the second L rod 42 increases, and the vertical distance between the bend and the end decreases, driving the cutting blade 3 to move towards the first sleeve 21.

[0044] The double-stage hinge structure of the L-shaped rod 4 converts the axial displacement of the sleeve assembly 2 into the radial displacement of the cutting blade 3: the first L-rod 41 transmits power through the hinge rod 13, and the second L-rod 42 provides guidance through the first sleeve 21, together driving the cutting blade 3 to move closer to the inner wall of the drain hole.

[0045] Multi-stage articulated transmission enables flexible adjustment, allowing the cutting blade 3 to adapt to different pipe diameters and ensuring effective contact between the blade and the pipe wall attachments (such as weeds and tree roots).

[0046] After the device is inserted into the drain hole, the cutting blade 3 is adjusted to the target position by continuously rotating the sleeve assembly 2. The sliding fit between the limiting strip 25 and the limiting groove 15 ensures the straightness of the movement trajectory of the cutting blade 3 and avoids jamming caused by deflection.

[0047] The operator applies rotational torque by holding the handle 11, while using the exposed main rod 1 to provide additional support, thereby enabling continuous cutting of the deposits inside the drain hole.

[0048] After the operation is completed, the sleeve assembly 2 is rotated in the opposite direction to return it to its retracted state, and the cutting blade 3 retracts to its initial position along with the L-shaped rod 4. The limiting function of the slot 14 and the protrusion 26 prevents accidental loosening, and the elastic cushioning of the rubber sleeve reduces component wear.

[0049] The tight fit between the limiting strip 25 and the limiting groove 15 ensures the structural stability of the device after reset, preparing it for the next use.

[0050] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways, as long as they do not depart from the scope of this utility model.

Claims

1. A telescopic mechanism, characterized in that: include, The main rod (1) and the sleeve assembly (2) are sleeved on the outside of the main rod (1). The sleeve assembly (2) includes a first sleeve (21) and a second sleeve (22), and the first sleeve (21) and the second sleeve (22) are screwed together.

2. The telescopic mechanism according to claim 1, characterized in that: The main rod (1) includes a handle (11), a connecting rod (12) is fixedly connected to one side of the handle (11), and a hinge rod (13) is fixedly connected to one end of the connecting rod (12).

3. The telescopic mechanism according to claim 2, characterized in that: The diameter of the connecting rod (12) is smaller than the diameter of the hinge rod (13), and a slot (14) is provided on the connecting rod (12).

4. The telescopic mechanism according to claim 3, characterized in that: The hinge rod (13) has a limiting groove (15) on its outer wall.

5. The telescopic mechanism according to claim 4, characterized in that: The first sleeve (21) has an internal thread at one end, and the second sleeve (22) has an external thread at one end. The internal thread of the first sleeve (21) is screwed into the external thread of the second sleeve (22).

6. The telescopic mechanism according to claim 5, characterized in that: The diameter of the first sleeve (21) is larger than the diameter of the second sleeve (22). The inner wall of the first sleeve (21) is fixedly connected with a limit strip (25), and one end of the second sleeve (22) is fixedly connected with a protrusion (26).

7. The telescopic mechanism according to claim 6, characterized in that: The outer wall of the inner thread end of the first sleeve (21) is fixedly connected to a first rubber sleeve (23), and the outer wall of the smooth rod end of the second sleeve (22) is fixedly connected to a second rubber sleeve (24).

8. A cutting device for slope drainage holes, comprising the telescopic mechanism as described in any one of claims 2 to 7, characterized in that: include, A cutting blade (3) is hinged to an L-shaped rod (4).

9. The cutting device for slope drainage holes according to claim 8, characterized in that: The L-shaped rod (4) includes a first L-rod (41) and a second L-rod (42). The corner of the first L-rod (41) is hinged to the cutting blade (3). One end of the first L-rod (41) is hinged to the hinge rod (13), and the other end of the first L-rod (41) is hinged to the second sleeve (22).

10. The cutting device for slope drainage holes according to claim 9, characterized in that: The second L-rod (42) is hinged at the bend of the cutting blade (3), one end of the second L-rod (42) is hinged to the first L-rod (41), and the other end of the second L-rod (42) is hinged to the second sleeve (22).

Images