Flexible shaft locking and anti-springback dredging machine based on flexible shaft size change

Abstract

The utility model discloses a flexible shaft locking and anti-springback dredging machine based on the size change of a flexible shaft, the front end of a hub is provided with a handle shell, the outer surface of the front end of the handle shell is provided with a rotating ring, and a positioning mechanism, a limiting mechanism and an anti-springback mechanism are arranged between the rotating ring and an annular groove. The anti-springback mechanism comprises a shaft locking piece and a locking piece spring, a bearing seat arranged in the lower handle shell supports the flexible shaft from the lower portion through a bearing, another bearing is arranged on a movable support arranged in the upper handle shell, a support spring is arranged between the lower end of the movable support and the bearing seat, and the flexible shaft is arranged on the support spring. The upper end of the movable support penetrates through a through hole formed in the handle upper shell and makes contact with a cam ring face arranged on the inner ring face of the cam ring shell. The cam ring shell is rotated, the movable support is pushed to move up and down through the size change of the cam ring face, and therefore the bearing on the movable support presses or loosens the flexible shaft from the upper portion.

Description

Technical Field

[0001] The utility model relates to a pipeline dredging machine, in particular to a flexible shaft locking and anti-rebound dredging machine based on the change of flexible shaft size. Background Art

[0002] Sewer pipes are indispensable in our daily life. For example, sewer pipes in toilets are very troublesome to clean when foreign objects fall into them, especially sewer pipes with water traps, which are difficult to clean. Sewer pipes are not cleaned for a long time, and dirt and urine alkali are collected in the water trap, which can easily cause blockage of the sewer pipe.

[0003] A dredging machine is a tool used to clear and unclog blocked pipes. Its structure mainly includes a flexible shaft driven by a power mechanism. When in use, the power mechanism can drive the flexible shaft to rotate and extend at the same time, so that the flexible shaft can penetrate into the pipe to be dredged to clear the blockage. In the decades since the birth of the dredging machine, directly inserting the flexible shaft of the dredging machine into the pipe to be dredged has become a common thinking in the industry and has been used to this day.

[0004] However, the existing drain cleaners on the market currently require additional trigger force to be applied when holding the front end, or the threaded lock shaft structure is large in size and inconvenient to operate, which hinders the better promotion and application of drain cleaners. In addition, the soft shaft will pop out after being unlocked, which may cause personal injury in serious cases. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a flexible shaft locking and anti-rebound dredging machine based on flexible shaft size changes which has reasonable design, convenient operation and anti-rebound.

[0006] The technical solution of the utility model is:

[0007] A flexible shaft locking and anti-rebound dredging machine based on flexible shaft size change, comprising a wheel hub 21 and a wheel hub cover 27, a rotating handle 28 is arranged on the wheel hub cover 27, a handle housing is arranged at the front end of the wheel hub 21, an annular groove is arranged on the front end outer surface of the handle housing, a rotating ring is arranged in the annular groove, a positioning mechanism and a limiting mechanism are arranged between the rotating ring and the annular groove, the handle housing is a two-half structure, which is formed by the handle upper shell 11 and the handle lower shell 22 being buckled and connected, and the rotating ring is a two-half structure, which is formed by the cam ring shell 12 and the cam ring cover 31 being buckled and connected;

[0008] A bearing seat 2 is provided in the handle upper shell and the handle lower shell, and two bearings are provided on the bearing seat 2, and the two bearings support the flexible shaft 25 from below. A movable bracket 6 is provided in the handle upper shell 11, and another bearing 4 is provided on the movable bracket 6. A bracket spring 5 is provided between the lower end of the movable bracket 6 and the rib plate of the handle upper shell and the handle lower shell, and the upper end of the movable bracket 6 passes through the through hole provided on the handle upper shell 11 and contacts with the cam ring surface 121 provided on the inner ring surface of the cam ring shell 12;

[0009] The handle upper shell 11 and the handle lower shell 22 are respectively provided with mounting grooves, and a shaft lock piece 8 is provided in the mounting grooves, and the two are clearance-matched, and a lock piece spring 3 is provided between the lower end of the shaft lock piece 8 and the bearing seat 2, and the movable bracket 6 is provided with a bracket extension portion 29, and the bracket extension portion 29 corresponds to the upper end of the shaft lock piece 8;

[0010] The cam ring housing 12 is rotated, and the size change of the cam ring surface 121 is used to push the movable bracket 6 to move up and down, so that the bearing 4 on the movable bracket 6 presses and loosens the flexible shaft 25 from above;

[0011] The movable bracket 6 moves up and down, and presses or releases the upper end of the locking shaft piece 8 through the bracket extension portion 29, so that the flexible shaft 25 can be clamped or released, thereby preventing the flexible shaft 25 from popping out after the locking is released.

[0012] Furthermore, a strip groove is provided at the upper end of the movable bracket 6, a rolling pin 7 is provided in the strip groove, and the rolling pin 7 is rollingly matched with the cam ring surface 121 to reduce friction resistance.

[0013] Furthermore: a blind hole is provided on the side wall of the annular groove of the handle upper shell 11, a lock pin spring 10 and a lock pin 9 are provided in the blind hole, and ring shell positioning holes are provided at intervals on the side of the cam ring shell 12, and the ring shell positioning holes, the lock pin spring 10 and the lock pin 9 constitute the positioning mechanism, and the lock pin 9 is plugged into and matched with different ring shell positioning holes to form locking and unlocking gears.

[0014] Furthermore: a through groove is provided on the bottom wall of the annular groove of the handle upper shell 11, and the handle upper shell 11 is provided with a through hole, in which a button 20 is provided, and a button spring 19 is provided at the lower end of the button 20, and the other end of the button spring 19 is in contact with the cover plate 18, and the cover plate 18 is arranged in the inner cavity of the handle upper shell 11 through a self-tapping thread 17, and a limiting block 30 is provided on the button 20, and a limiting groove 122 is provided on the cam ring shell 12, and the limiting block 30 can be inserted into the limiting groove 122, and the limiting block 30 and the limiting groove 122 cooperate to constitute the limiting mechanism to limit the rotation of the rotating ring.

[0015] Furthermore: a hollow shaft is provided at the front end of the wheel hub 21, and a supporting baffle is provided in the handle housing. The supporting baffle is fastened by connecting bolts 13, positioning sheets 14, bushings 16 and flat washers 15, so that a certain gap is left between the rear end of the handle housing and the wheel hub 21 without contact. Thus, the wheel hub 21 can rotate in the handle.

[0016] Furthermore, a fixing ring groove is arranged on the inner ring surface of the front end of the handle upper shell 11 and the handle lower shell 22 , a guide ring 1 is arranged in the fixing ring groove, and the front end of the flexible shaft 25 passes through the guide ring 1 .

[0017] Furthermore, the handle upper shell 11 and the cam ring shell 12 are respectively provided with lock-shaped marks 26 to indicate unlocking and locking positions.

[0018] Furthermore: a screw column extends out from the lower end of the bearing seat 2, and the screw column is matched with the shaft hole gap on the bearing seat plate 23. A bearing seat spring 24 is arranged between the bearing seat 2 and the bearing seat plate 23. The connecting bolt and the flat washer are connected to the screw column to fix the bearing seat plate 23 to the bearing seat 2. At this time, the bearing seat spring 24 has been pre-stressed to meet the locking force requirement of the soft shaft 24 of the minimum limit size. The rear end face of the bearing seat plate 23 is close to the corresponding rib surface in the groove of the handle shell that accommodates the bearing seat 2 assembly. When the soft shaft exceeds the set lower limit size, the bearing on the movable bracket presses the soft shaft and pushes the bearing seat back. The bearing seat plate is close to the bearing seat groove support surface on the upper and lower shells of the handle. The bearing seat retreats and presses the bearing seat spring. The gap between the bearing seat plate and the bearing seat is reduced, completing the elastic locking of the soft shaft. After the locking force of the soft shaft 25 is released, the bearing seat spring 24 bounces the bearing seat 2 back to the set position.

[0019] The beneficial effects of the utility model are:

[0020] 1. The utility model utilizes the change in the size of the cam ring surface to promote the movement of the movable bearing assembly, thereby achieving the tightening of the bearing and the loosening of the flexible shaft, which can better dredge the pipeline.

[0021] 2. The utility model is provided with a push-button switch structure. When the button is turned on, the rotating ring can rotate, thereby achieving locking. Conversely, when the button is turned off, the rotating ring is limited and cannot rotate, thereby preventing misoperation.

[0022] 3. The utility model utilizes the extended part of the bracket to press and release the shaft locking piece, so that the shaft locking piece can clamp and loosen the flexible shaft, preventing the flexible shaft from popping out and avoiding accidents.

[0023] 4. The utility model has reasonable design, convenient operation and anti-rebound, only requires gripping force when in use, is easy to operate, easy to promote and implement, and has good economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a flexible shaft locking and anti-rebound dredging machine based on the change of flexible shaft size;

[0025] Figure 2 It is a partial structural explosion diagram of a flexible shaft locking and anti-rebound dredging machine based on the change of flexible shaft size;

[0026] Figure 3 It is a partial cross-sectional view of a flexible shaft locking and anti-rebound dredging machine based on the change of flexible shaft size;

[0027] Figure 4 for Figure 2 A partial enlarged view of the structure;

[0028] Figure 5 The structure diagram of a cam ring housing of a flexible shaft locking and anti-rebound dredging machine based on the change of flexible shaft size;

[0029] Figure 6 It is a cam ring housing and button locking structure diagram of a flexible shaft locking and anti-rebound dredging machine based on the change of flexible shaft size;

[0030] Figure 7 for Figure 6 Schematic diagram of the structure of the middle cam ring housing and button unlocking. DETAILED DESCRIPTION

[0031] Example 1: See Figure 1 -- Figure 7 , In the figure, 1-guide ring, 2-bearing seat, 3-locking plate spring, 4-bearing, 5-bracket spring, 6-movable bracket, 7-rolling pin, 8-locking shaft plate, 9-locking pin, 10-locking pin spring, 11-handle upper shell, 12-cam ring shell, 13-connecting screw, 14-positioning plate, 15-flat washer, 16-sleeve, 17-self-tapping screw, 18-cover plate, 19-button spring, 20-button, 21-wheel hub, 22-handle lower shell, 23-bearing seat plate, 24-bearing seat spring, 25-flexible shaft, 26-lock mark, 27-wheel hub cover, 28-rotating handle, 29-bracket extension, 30-limit block, 121-cam ring surface, 122-limiting groove.

[0032] A flexible shaft locking and anti-rebound dredging machine based on the change of flexible shaft size, comprising a wheel hub 21 and a wheel hub cover 27, the two are rotatably connected, the inner cavity of the wheel hub 21 is provided with a transmission mechanism, the wheel hub cover 27 is provided with a rotating handle 28, an axial hole is provided through the center of the wheel hub 21 and the wheel hub cover 27, the flexible shaft 25 passes through the axial hole, and the rotating handle 28 rotates and advances the flexible shaft 25 through the transmission mechanism (this is the prior art, and the specific results are not described in detail), wherein: a handle housing is provided at the front end of the wheel hub 21, an annular groove is provided on the front end outer surface of the handle housing, a rotating ring is provided in the annular groove (the two are clearance-matched and can rotate), a positioning mechanism and a limiting mechanism are provided between the rotating ring and the annular groove, the handle housing is a two-half structure, which is formed by the handle upper shell 11 and the handle lower shell 22 being buckled and connected, and the rotating ring is a two-half structure, which is formed by the cam ring housing 12 and the cam ring cover 31 being buckled and connected;

[0033] A bearing seat 2 is provided in the handle upper shell 11 and the handle lower shell 31, and two bearings are provided on the bearing seat 2, and the two bearings support the flexible shaft 25 from below (the two bearings present a certain angle, which is convenient for stably supporting the flexible shaft 25), a movable bracket 6 is provided in the handle upper shell 11, and another bearing 4 is provided on the movable bracket 6, and a bracket spring 5 is provided between the lower end of the movable bracket 6 and the rib plate on the handle upper shell 11 (a mounting hole is provided on the movable bracket 6, and the upper end of the bracket spring 5 is located in the mounting hole to prevent falling off), and the upper end of the movable bracket 6 passes through the through hole provided on the handle upper shell 11 (the two are clearance-matched and can slide against each other) and contacts with the cam ring surface 121 provided on the inner ring surface of the cam ring shell 12;

[0034] The handle upper shell 11 and the handle lower shell 22 are respectively provided with mounting grooves, and the mounting grooves are provided with a shaft lock piece 8, and the two are clearance-matched, and a lock piece spring 3 is provided between the lower end of the shaft lock piece 8 and the bearing seat 2, and the movable bracket 6 is provided with a bracket extension 29, and the bracket extension 29 corresponds to the upper end of the shaft lock piece 8;

[0035] The cam ring housing 12 is rotated, and the size change of the cam ring surface 121 is used to push the movable bracket 6 to move up and down, so that the bearing 4 on the movable bracket 6 presses and loosens the flexible shaft 25 from above;

[0036] The movable bracket 6 moves up and down, and the bracket extension portion 29 presses or releases the upper end of the locking shaft piece 8, so that the flexible shaft 25 can be clamped or released, preventing the flexible shaft 25 from popping out after the locking is released.

[0037] Optimal solution: a strip groove is provided at the upper end of the movable bracket 6, a rolling pin 7 is provided in the strip groove, and the rolling pin 7 is rollingly matched with the cam ring surface 131 to reduce friction resistance.

[0038] Preferred solution: a through groove is provided on the bottom wall of the annular groove of the handle upper shell 11, and a through hole is provided on the handle upper shell 11. A button 20 is provided in the through hole, and a button spring 19 is provided at the lower end of the button 20. The other end of the button spring 19 contacts with the cover plate 18. The cover plate 18 is arranged in the inner cavity of the handle upper shell 11 through a self-tapping screw 17. A limiting block 30 is provided on the button 20, and a limiting groove 122 is provided on the cam ring shell 12. The limiting block 30 can be inserted into the limiting groove 122. The limiting block 30 and the limiting groove 122 cooperate to form a limiting mechanism to limit the rotation of the rotating ring.

[0039] Preferred solution: A blind hole is provided on the side wall of the annular groove of the handle upper shell 11, and a lock pin spring 10 and a lock pin 9 (not shown in the figure) are provided in the blind hole. Ring shell positioning holes are provided at intervals on the side of the cam ring shell 12. The ring shell positioning holes, the lock pin spring 10 and the lock pin 9 constitute a positioning mechanism. The lock pin 9 is plugged into and matched with different ring shell positioning holes to form different gear positions.

[0040] Preferred solution: A hollow shaft is provided at the front end of the wheel hub 21, a support partition is provided in the handle housing, and the support partition is fastened by connecting bolts 13 and fixing pads 16, so that the rear end of the handle housing is in close contact with the wheel hub 18. A sleeve 17 can be mounted on the hollow shaft as needed.

[0041] Optimal solution: A fixed ring groove is provided on the inner ring surface of the front end of the handle upper shell 11 and the handle lower shell 22, a guide ring 1 is provided in the fixed ring groove, and the front end of the flexible shaft 25 passes through the guide ring 1.

[0042] Preferred solution: Lock-shaped marks 26 are respectively provided on the handle upper shell 11 and the cam ring shell 12 to indicate the unlocking and locking positions.

[0043] Unlocked state: At this time, under the action of the bracket spring 5, the movable bracket 6 moves upward, and its upper end contacts the maximum diameter of the cam ring surface 131, and the bearing 4 on the movable bracket 6 is separated from the flexible shaft 25.

[0044] Locking state: the cam ring housing 12 is rotated, the diameter of the cam ring surface 121 becomes smaller, pressing the movable bracket 6 to move downward, so that the bearing 4 on the movable bracket 6 presses the flexible shaft 32 for clamping.

[0045] Before rotating the cam ring housing 12, the button 20 must be pressed first to disengage the limiting block 30 on the button 20 from the limiting groove 122, and then the cam ring housing 12 can be rotated, thereby preventing the cam ring housing 12 from being accidentally touched and causing an erroneous rotation.

[0046] While the movable bracket 6 moves toward the axis, the bracket extension 29 pushes the shaft lock piece 8 downward, and the pressing surface of the shaft lock piece 8 that radially presses the flexible shaft 25 leaves the flexible shaft 25. At this time, the bracket spring 5 is pressed, and the movable bracket spring 6 is pressed;

[0047] The cam ring housing 12 rotates in the unlocking direction and reaches the set position, and the unlocking is completed. During the unlocking rotation process, the pressure on the movable bracket 6 is gradually released, the bracket spring 5 is released to bounce the movable bracket 6, the lock plate spring 3 is released and pushes the lock shaft plate 8 to radially press the soft shaft 25 to prevent the soft shaft 25 from popping out after unlocking, thereby avoiding accidents.

[0048] Embodiment 2: This embodiment is basically the same as Embodiment 1, and the similarities are not repeated. The difference is that: the handle upper shell 1 and the handle lower shell 22 are connected by connecting screws, and the cam ring shell 12 and the cam ring cover 31 are connected by connecting screws.

[0049] Embodiment 3: This embodiment is basically the same as Embodiment 1, and the similarities are not repeated here. The difference is that a screw column extends from the lower end of the bearing seat 2, and the screw column is clearance-matched with the axial hole on the bearing seat plate 23, and a bearing seat spring 24 is provided between the bearing seat 2 and the bearing seat plate 23 (as needed, a bearing blind hole can be provided at the lower end of the bearing seat 2, and the upper end of the bearing seat spring 24 is located in the bearing for easy positioning), and the connecting bolts and flat washers are connected to the screw column to prevent the bearing seat plate 23 from falling off.

[0050] When the flexible shaft 25 exceeds the set size (lower limit of the size), the bearing 4 on the movable bracket 6 presses the flexible shaft 25 and pushes the bearing seat 2 to move downward. At this time, the bearing seat plate 23 is close to the lower supporting surface of the bearing seat groove on the upper and lower shells 22 of the handle, and the bearing seat 2 retreats and presses the bearing seat spring 24. The gap between the bearing seat plate 23 and the bearing seat 2 is reduced, completing the elastic locking of the flexible shaft 25.

[0051] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any simple modification made according to the technical essence of the utility model still falls within the scope of the technical solution of the utility model.

Claims

1. A flexible shaft locking and anti-rebound dredging machine based on flexible shaft size change, comprising a hub (21) and a hub cover (27), wherein the hub cover (27) is provided with a rotating handle (28), wherein: A handle housing is provided at the front end of the wheel hub (21); an annular groove is provided on the front end outer surface of the handle housing; a rotating ring is provided in the annular groove; a positioning mechanism and a limiting mechanism are provided between the rotating ring and the annular groove; the handle housing is a two-half structure, formed by a handle upper shell (11) and a handle lower shell (22) being buckled together; and the rotating ring is a two-half structure, formed by a cam ring shell (12) and a cam ring cover (31) being buckled together; A bearing seat (2) is provided in the handle upper shell and the handle lower shell, two bearings are provided on the bearing seat (2), and the two bearings support the flexible shaft (25) from below; a movable bracket (6) is provided in the handle upper shell (11), another bearing (4) is provided on the movable bracket (6), a bracket spring (5) is provided between the lower end of the movable bracket (6) and the rib plate of the handle upper shell and the handle lower shell, and the upper end of the movable bracket (6) passes through a through hole provided on the handle upper shell (11) and contacts a cam ring surface (121) provided on the inner ring surface of the cam ring shell (12); The handle upper shell (11) and the handle lower shell (22) are respectively provided with mounting grooves, a shaft locking piece (8) is provided in the mounting grooves, the two are clearance-matched, a locking piece spring (3) is provided between the lower end of the shaft locking piece (8) and the bearing seat (2), and the movable bracket (6) is provided with a bracket extension portion (29), and the bracket extension portion (29) corresponds to the upper end of the shaft locking piece (8); The cam ring housing (12) is rotated, and the size change of the cam ring surface (121) is used to push the movable bracket (6) to move up and down, so that the bearing (4) on the movable bracket (6) presses and loosens the flexible shaft (25) from above; The movable bracket (6) moves up and down, and presses or releases the upper end of the locking shaft piece (8) through the bracket extension portion (29), so that the locking shaft (25) can be fixed or released, thereby preventing the flexible shaft (25) from popping out after the locking is released.

2. According to claim 1, a flexible shaft locking and anti-rebound dredging machine based on flexible shaft size change is characterized by: The upper end of the movable bracket (6) is provided with a strip-shaped groove, a rolling pin (7) is provided in the strip-shaped groove, and the rolling pin (7) and the cam ring surface (121) are in rolling engagement to reduce frictional resistance.

3. The flexible shaft locking and anti-rebound dredging machine based on flexible shaft size change according to claim 1 is characterized in that: A blind hole is provided on the side wall of the annular groove of the handle upper shell (11), a lock pin spring (10) and a lock pin (9) are provided in the blind hole, and ring shell positioning holes are provided at intervals on the side of the cam ring shell (12), the ring shell positioning holes, the lock pin spring (10) and the lock pin (9) constitute the positioning mechanism, and the lock pin (9) is plugged into and matched with different ring shell positioning holes to form locking and unlocking gears.

4. The flexible shaft locking and anti-rebound dredging machine based on flexible shaft size change according to claim 1 is characterized in that: A through groove is provided on the bottom wall of the annular groove of the handle upper shell (11), the handle upper shell (11) is provided with a through hole, a button (20) is provided in the through hole, a button spring (19) is provided at the lower end of the button (20), the other end of the button spring (19) is in contact with a cover plate (18), the cover plate (18) is arranged in the inner cavity of the handle upper shell (11) through a self-tapping thread (17), a limit block (30) is provided on the button (20), a limit groove (122) is provided on the cam ring shell (12), the limit block (30) can be inserted into the limit groove (122), and the limit block (30) and the limit groove (122) cooperate to form the limit mechanism to limit the rotation of the rotating ring.

5. The flexible shaft locking and anti-rebound dredging machine based on flexible shaft size change according to claim 1 is characterized in that: A hollow shaft is arranged at the front end of the wheel hub (21), and a supporting partition is arranged in the handle housing. The supporting partition is fastened by means of a connecting bolt (13), a positioning sheet (14), a shaft sleeve (16) and a flat washer (15), so that a certain gap is left between the rear end of the handle housing and the wheel hub (21) without contact. Thus, the wheel hub (21) can rotate in the handle.

6. The flexible shaft locking and anti-rebound dredging machine based on flexible shaft size change according to claim 1 is characterized in that: A fixed annular groove is provided on the inner annular surfaces at the front ends of the handle upper shell (11) and the handle lower shell (22), a guide ring (1) is provided in the fixed annular groove, and the front end of the flexible shaft (25) passes through the guide ring (1).

7. The flexible shaft locking and anti-rebound dredging machine based on flexible shaft size change according to claim 1 is characterized in that: The handle upper shell (11) and the cam ring shell (12) are respectively provided with lock-shaped markings (26) to indicate unlocking and locking positions.

8. The flexible shaft locking and anti-rebound dredging machine based on flexible shaft size change according to claim 1 is characterized in that: A screw column extends from the lower end of the bearing seat (2), and the screw column is gap-matched with the shaft hole on the bearing seat plate (23). A bearing seat spring (24) is arranged between the bearing seat (2) and the bearing seat plate (23). A connecting bolt and a flat washer are connected to the screw column to fix the bearing seat plate (23) to the bearing seat (2). At this time, the bearing seat spring (24) has been pre-stressed to meet the locking force requirement of the soft shaft (25) of the minimum limit size. The rear end face of the bearing seat plate (23) is close to the corresponding rib surface in the groove of the handle housing that accommodates the bearing seat (2) component. When the soft shaft exceeds the set lower limit size, the bearing on the movable bracket presses the soft shaft and pushes the bearing seat back. The bearing seat plate is close to the bearing seat groove support surface on the upper and lower shells of the handle. The bearing seat moves back and presses the bearing seat spring. The gap between the bearing seat plate and the bearing seat is reduced, and the elastic locking of the soft shaft is completed. After the locking force of the soft shaft (25) is released, the bearing seat spring (24) rebounds the bearing seat (2) back to the set position.

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