Locking structure for flexible shaft of dredging machine

Abstract

The utility model discloses a locking structure for a flexible shaft of a dredging machine, which is simple, convenient and safe to operate. The locking structure comprises a sleeve and a flexible shaft, wherein the sleeve is rotatably arranged at the front end of a hub; the flexible shaft is coiled in the hub and extends out of the sleeve; the fixed bearing assembly and the movable bearing assembly are arranged in the sleeve, and the rotating sleeve is rotationally arranged outside the sleeve; one end of the movable bearing assembly is hinged in the sleeve, and the other end of the movable bearing assembly and the fixed bearing assembly jointly act to clamp the flexible shaft; the top of the movable bearing assembly extends out of the sleeve and is matched with the inclined surface of the inner wall of the rotating sleeve; the rotating sleeve is in threaded connection with the sleeve, the rotating sleeve moves front and back along the sleeve under the action of threads, and the flexible shaft is clamped or released by pressing down or loosening the movable bearing assembly through the inclined plane; a clamping ring for limiting the moving distance of the rotating sleeve is arranged at the front end of the sleeve.

Description

Technical Field

[0001] The utility model relates to a pipeline dredging device, in particular to a flexible shaft locking structure in a dredging machine. Background Art

[0002] The existing handheld dredging machine basically locks the flexible shaft by locking the screw. When working, first loosen the locking screw, then the operator holds the handle with one hand while pressing the trigger, and holds the electric wrench with the other hand, starts the electric wrench to drive the wheel hub to rotate forward, and then drives the flexible shaft to extend outward. After the dredging work is completed, both hands control the handle trigger and the electric trigger at the same time, and the wheel hub reverses to drive the flexible shaft to retract inward, and finally tighten the locking screw to lock the flexible shaft. The operation steps of such a dredging machine are very complicated, and the flexible shaft is easy to pop out of the wheel hub when it is loosened too quickly, which poses a safety hazard; in addition, after the operator loosens the locking screw, the hand holding the handle needs to keep pressing the trigger during the entire dredging process, and the operator is particularly prone to fatigue and hand soreness, which affects the comfort of operation and is very inconvenient to operate. Summary of the invention

[0003] The utility model aims to provide a flexible shaft locking structure for a dredging machine which is simple, convenient and safe to operate.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A flexible shaft locking structure for a cleaning machine comprises a sleeve rotatably arranged at the front end of a wheel hub, a flexible shaft coiled in the wheel hub and extending out of the sleeve; further comprising a fixed bearing assembly, a movable bearing assembly, and a swivel sleeve rotatably arranged outside the sleeve; one end of the movable bearing assembly is hinged in the sleeve, and the other end cooperates with the fixed bearing assembly to clamp the flexible shaft; a reset spring is provided at the bottom of the movable bearing assembly, and a sleeve extends out of the top of the movable bearing assembly and cooperates with the inclined surface of the inner wall of the swivel sleeve; the swivel sleeve and the sleeve are threadedly connected, and the swivel sleeve moves back and forth along the sleeve under the action of the thread, and the flexible shaft is clamped or released by pressing down or loosening the movable bearing assembly through the inclined surface; a retaining ring is provided at the front end of the sleeve to limit the moving distance of the swivel sleeve.

[0006] Preferably, the movable bearing assembly comprises a movable bearing arm and a movable bearing; one end of the movable bearing arm is hinged to the inner side of the sleeve, and the other end is connected to the movable bearing; the reset spring is arranged at the bottom of the movable bearing arm.

[0007] Preferably, a shaft locking spring is provided in the sleeve at the rear end of the movable bearing arm, and a boss is provided at the rear end of the movable bearing arm; one end of the shaft locking spring is hinged in the sleeve, and the other end is clamped on the soft shaft, and the middle part rests on the boss and moves away from or locks the soft shaft as the movable bearing arm rotates.

[0008] Preferably, the fixed bearing assembly includes a fixed bearing seat and a fixed bearing; a slot hole is provided on the top surface of the fixed bearing seat for the flexible shaft to pass through; two fixed bearings are provided on the fixed bearing seat, and are respectively arranged on both sides of the slot hole, forming a triangular structure with the movable bearing assembly to clamp the flexible shaft.

[0009] Preferably, the outer wall of the rotating sleeve is provided with a rotation mark for locking or loosening the flexible shaft.

[0010] Compared with the prior art, the utility model has the following beneficial effects: first, a fixed bearing assembly and a movable bearing assembly for clamping the flexible shaft are arranged in the sleeve, and the movable bearing assembly is pressed or loosened by rotating the rotating sleeve threadedly connected to the outside of the sleeve, and the flexible shaft is pressed or loosened, and is moved closer to or away from the fixed bearing assembly. Due to the threaded connection between the rotating sleeve and the sleeve, during operation, the flexible shaft can be clamped or loosened by rotating the rotating sleeve. When unblocking the pipeline, the handle can be directly held with one hand, and the electric wrench or manual crank can be turned on with the other hand to realize automatic feeding of the flexible shaft. The structure is simple and the operation is convenient; second, since the rotating sleeve and the sleeve are threadedly connected, the threaded connection structure keeps the rotation angle of the rotating sleeve stable, and the clamping or loosening state of the flexible shaft can be maintained without additional force. The threaded connection also makes it possible to freely adjust the locking force of the flexible shaft, and the operation is very easy and comfortable; third, a clamping ring is provided at the front end of the sleeve to limit the moving distance of the rotating sleeve, which makes the operation more convenient.

[0011] Further beneficial effects: first, a shaft locking spring is arranged at the tail end of the movable bearing assembly, one end of the shaft locking spring is clamped on the flexible shaft, and the other end is against the boss at the tail end of the movable bearing assembly. When the rotating sleeve is rotated to clamp the flexible shaft, the movable bearing assembly is pressed down and rotates around the hinge, the boss gradually tilts up and lifts the shaft locking spring to release it away from the flexible shaft, and when the rotating sleeve is reversed to loosen the flexible shaft, the boss releases the squeezing of the shaft locking spring as the movable bearing assembly rotates, and the shaft locking spring falls and clamps the flexible shaft. The flexible shaft is controlled to pop out by means of such a linkage mechanism, and the operation is very safe and convenient; second, two fixed bearings are arranged in the fixed bearing assembly, and a triangular structure is formed with the movable bearing assembly to clamp the flexible shaft. The triangular clamping structure is more stable and has a stronger clamping force; third, the handle structure perpendicular to the sleeve is cancelled, which is more convenient for storage on the one hand, and it is easier to approach the dredging port by holding the handle coaxial with the sleeve on the other hand; third, a rotation mark is provided on the outer wall of the rotating sleeve, which is convenient for the operator to rotate the rotating sleeve to lock or loosen the flexible shaft, and the operation is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model of the soft shaft locking structure of the dredging machine installed in the dredging machine;

[0013] Figure 2 This is a schematic diagram of the internal structure of the soft shaft locking structure of the utility model dredging machine;

[0014] Figure 3It is a structural schematic diagram of the flexible shaft locking structure of the utility model dredging machine when the flexible shaft is released by the movable bearing assembly;

[0015] Figure 4 It is a schematic diagram of the three-dimensional exploded structure after the sleeve is removed;

[0016] Among them, 1. rotating sleeve; 2. fixed bearing assembly; 3. movable bearing assembly; 4. reset spring; 5. locking shaft spring; 6. retaining ring; 20. fixed bearing seat; 30. movable bearing arm; 31. boss; 10. rotating mark; 100. flexible shaft; 200. wheel hub; 300. sleeve; 400. rotating part; 500. hand-held part; 600. rotating shaft; 700. manual crank. DETAILED DESCRIPTION

[0017] In order to make the technical solution of the utility model clearer, the following Figure 1-4 It should be understood that the specific implementation methods described in this specification are only for explaining the utility model, and are not intended to limit the protection scope of the utility model.

[0018] A flexible shaft locking structure for a dredging machine, see attached Figure 1-4 As shown, it includes a flexible shaft 100, a sleeve 300, a rotating sleeve 1, a fixed bearing assembly 2, a movable bearing assembly 3, a reset spring 4 and a shaft locking spring 5; the sleeve 300 is installed at the front end of the dredging machine hub 200, and the flexible shaft 100 is coiled in the hub 200; the hub 200, the flexible shaft 100, and the sleeve 300 are all prior art; the flexible shaft 100 is an integral or combined type, and the flexible shaft head can have different functional shapes and can be assembled or made into one with the flexible shaft, which is used to clear blockages in pipes; the flexible shaft 100 is coiled in the hub 200, the sleeve 100 is rotatably arranged in front of the hub 200 and one end of the flexible shaft 100 is extended from the hub 200. The sleeve 300 extends out of the hub 200; a rotating portion 400 is provided at the front end of the hub 200, and the rotating portion 400 is rotatably inserted into the sleeve 300, so that the relative rotation of the hub 200 and the sleeve 300 is realized by the rotating portion 400; a hand-held portion 500 is provided on the outer side of the sleeve 300 near the end of the hub 200, and the hand-held portion 500 of the present embodiment is composed of a plurality of convex ribs evenly distributed on the outside of the sleeve 300 in an annular shape, and can also be made into a sleeve-shaped hand-held portion, which is detachably fixed on the outside of the sleeve, and the hub 200 can be rotated forward and reverse by holding the hand-held portion 500, and the forward and reverse rotation of the hub 200 can be controlled by a manual crank 700, or by an electric drive shaft 600.

[0019] The fixed bearing assembly 2, the movable bearing assembly 3, and the return spring 4 are all arranged in the sleeve 300; the fixed bearing assembly 2 is fixed in the sleeve 300 and is arranged below the flexible shaft 100, and the fixed bearing assembly 2 includes a fixed bearing seat 20 and two fixed bearings; the top surface of the fixed bearing seat 20 is provided with a slot for the flexible shaft 100 to pass through; the two fixed bearings are both installed on the fixed bearing seat 20, and the two fixed bearings are respectively arranged on both sides of the slot; one end of the movable bearing assembly 3 is hinged in the sleeve 300 and is arranged above the flexible shaft 100; the movable bearing assembly 3 includes a movable bearing arm 30 and a movable bearing; one end of the movable bearing arm 30 is hinged to the inner side of the sleeve 300, and the other end is fixedly connected to the movable bearing, and the movable bearing and the two fixed bearings form a triangular structure to clamp the flexible shaft 100 together; the return spring 4 is arranged at the bottom of the movable bearing arm 30 to provide elastic restoring force for the movable bearing arm 30.

[0020] The rotating sleeve 1 is arranged at the front end of the sleeve 300, and a retaining ring 6 is provided at the front end of the rotating sleeve 1 to prevent the rotating sleeve from slipping and limit the moving distance of the rotating sleeve; the rear part is threadedly connected to the sleeve 300, and when the rotating sleeve 1 rotates, it moves back and forth along the sleeve 300 under the action of the thread; the inner wall of the rotating sleeve 1 is provided with an inclined surface, the top of the movable bearing arm 30 extends out of the sleeve 300, and the top of the movable bearing arm 30 is provided with an inclined surface that matches the inclined surface of the inner wall of the rotating sleeve 1; when the rotating sleeve 1 rotates, the movable bearing of the movable bearing arm 30 is pressed down or released by the inclined surface to control the movable bearing and the fixed bearing to clamp or loosen the flexible shaft 100 together; the reset spring 4 is arranged at the bottom of the movable bearing arm 30 to provide elastic restoring force for the movable bearing arm 30; the outer wall of the rotating sleeve 1 is provided with a rotation mark 10 for locking or loosening the flexible shaft 100.

[0021] A boss 31 is provided at the rear end of the movable bearing arm 30, and the boss 31 and the movable bearing arm 30 are an integrated structure; a locking shaft spring 5 is also provided at the rear end of the boss 31 located in the movable bearing arm 30 in the sleeve 300; one end of the locking shaft spring 5 is hinged in the sleeve 300 through a spring pin, and the other end is clamped on the soft shaft 100, the boss 31 is against the middle part of the locking shaft spring 5, and the locking shaft spring 5 rotates around the spring pin to lift the locking shaft spring 5 away from the soft shaft 100 or lower it to lock the soft shaft 100.

[0022] See attached Figure 2 As shown, when the rotating sleeve 1 rotates and moves backward, the rotating sleeve 1 presses down the movable bearing arm 30 under the action of the inner wall inclined surface, and the movable bearing and the fixed bearing jointly press the flexible shaft 100, and the reset spring 4 is compressed. The boss 31 set at the other end of the movable bearing arm 30 drives the locking shaft spring 5 to rotate and rise around the spring pin to lift the locking shaft spring 5, and the locking shaft spring 5 leaves the flexible shaft 100, releasing the locking of the flexible shaft 100. At this time, the rotating shaft 600 is manually driven by the manual crank 700 or electrically driven by tools such as an electric drill to drive the wheel hub 200 to rotate, and the flexible shaft 100 can automatically feed or retract the wheel hub 200.

[0023] See attached Figure 3 As shown, when the rotating sleeve 1 rotates and moves forward, the inclined surface of the inner wall of the rotating sleeve 1 gradually leaves the inclined surface of the movable bearing arm 30, and the movable bearing moves upward under the action of the reset spring 4, loosening the flexible shaft 100, and the boss 31 arranged on the movable bearing arm 30 rotates with the movable bearing arm 30, and the locking spring 5 falls to lock the flexible shaft 100. At this time, the rotating shaft 600 is manually driven by a manual crank 700 or electrically driven by a tool such as an electric drill to drive the wheel hub 200 to rotate, and the flexible shaft 100 rotates with the wheel hub 200 to clear the pipeline.

[0024] In the description of the present technical solution, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "inner" are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present technical solution and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present technical solution.

[0025] At the same time, in the description of this technical solution, it should be noted that, unless otherwise clearly specified and limited, the terms "fixed" and "matched" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this technical solution can be understood according to specific circumstances.

[0026] Although embodiments of the present technical solution have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present technical solution, and that the scope of the present technical solution is defined by the appended claims and their equivalents.

Claims

1. A flexible shaft locking structure for a dredging machine, comprising a sleeve (300) rotatably arranged at the front end of a hub (200), and a flexible shaft (100) disposed in the hub (200) and extending out of the sleeve (300), characterized in that: The invention also comprises a fixed bearing assembly (2) arranged in the sleeve (300), a movable bearing assembly (3), and a rotating sleeve (1) rotatably arranged outside the sleeve (300); one end of the movable bearing assembly (3) is hinged in the sleeve (300), and the other end cooperates with the fixed bearing assembly (2) to clamp the flexible shaft (100); a reset spring (4) is provided at the bottom of the movable bearing assembly (3), and the top of the movable bearing assembly (3) extends out of the sleeve (300) and cooperates with the inclined surface of the inner wall of the rotating sleeve (1); the rotating sleeve (1) and the sleeve (300) are screwed together, and the rotating sleeve (1) moves forward and backward along the sleeve (300) under the action of the thread, and the flexible shaft (100) is clamped or released by pressing down or releasing the movable bearing assembly (3) by the inclined surface; a retaining ring (6) is provided at the front end of the sleeve (300) to limit the moving distance of the rotating sleeve (1).

2. The flexible shaft locking structure of the dredging machine according to claim 1 is characterized in that: The movable bearing assembly (3) comprises a movable bearing arm (30) and a movable bearing; one end of the movable bearing arm (30) is hinged to the inner side of the sleeve (300), and the other end is connected to the movable bearing; the return spring (4) is arranged at the bottom of the movable bearing arm (30).

3. The flexible shaft locking structure of the dredging machine according to claim 2 is characterized in that: A shaft locking spring (5) is provided in the sleeve (300) at the rear end of the movable bearing arm (30), and a boss (31) is provided at the rear end of the movable bearing arm (30); one end of the shaft locking spring (5) is hinged in the sleeve (300), and the other end is clamped on the flexible shaft (100), and the middle part abuts against the boss (31) and moves away from or locks the flexible shaft (100) as the movable bearing arm (30) rotates.

4. The flexible shaft locking structure of the dredging machine according to claim 2 or 3, characterized in that: The fixed bearing assembly (2) comprises a fixed bearing seat (20) and a fixed bearing; a slot hole is provided on the top surface of the fixed bearing seat (20) for the flexible shaft (100) to pass through; two fixed bearings are provided on the fixed bearing seat (20), and are respectively arranged on both sides of the slot hole, forming a triangular structure with the movable bearing assembly (3) to clamp the flexible shaft (100).

5. The flexible shaft locking structure of the dredging machine according to claim 4 is characterized in that: The outer wall of the rotating sleeve (1) is provided with a rotation mark (10) for locking or loosening the flexible shaft (100).

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