Dredging machine for controlling tightness of flexible shaft based on size change of cam ring surface

Abstract

The utility model discloses a dredger for controlling the tightness of a flexible shaft based on the size change of a cam ring surface, the front end of a hub is provided with a handle shell, a rotating ring is arranged in an annular groove arranged on the outer surface of the front end of the handle shell, a positioning mechanism and a limiting mechanism are arranged between the rotating ring and the annular groove, and the rotating ring and the annular groove are connected through a connecting rod. Two bearings are arranged on a bearing seat arranged in the lower handle shell and support the flexible shaft from the lower portion, another bearing is arranged on a movable support arranged in the upper handle shell, and a support spring is arranged between the lower end of the movable support and the bearing seat. 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, and the movable bracket is pushed to move up and down by utilizing the size change of the cam ring surface, so that the bearing on the movable bracket compresses and loosens the flexible shaft from the upper part.

Description

Technical Field

[0001] The utility model relates to a pipeline dredging machine, in particular to a dredging machine which controls the tightness of a flexible shaft based on the change of the size of a cam ring surface. 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] The unblocking 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 unblocked to clear the blockage. In the decades since the birth of the unblocking machine, directly inserting the flexible shaft 32 of the unblocking machine into the pipe to be unblocked 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 the drain cleaners. 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 dredging machine which is reasonably designed, convenient to operate and has multiple gears and controls the tightness of a flexible shaft based on the change of the cam ring surface size.

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

[0007] A dredging machine for controlling the tightness of a flexible shaft based on the change of the size of a cam ring surface, comprising a wheel hub 18 and a wheel hub cover 24, which are rotatably connected, a transmission mechanism is provided in the inner cavity of the wheel hub 18, a rotating handle 31 is provided on the wheel hub cover 24, an axial hole is provided through the center of the wheel hub 18 and the wheel hub cover 24, a flexible shaft 32 passes through the axial hole, and the rotating handle 31 causes the flexible shaft 32 to rotate and move forward through the transmission mechanism, wherein: a handle housing is provided at the front end of the wheel hub 18, 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, which is formed by a handle upper shell (12) and a handle lower shell 33 being buckled and connected, and the rotating ring is a two-half structure, which is formed by a cam ring housing 13 and a cam ring cover 34 being buckled and connected;

[0008] A bearing seat 2 is provided in the handle lower shell 33, and two bearings 4 are provided on the bearing seat 2, and the two bearings 4 support the flexible shaft 32 from below. A movable bracket 6 is provided in the handle upper shell 12, 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 bearing seat 2, and the upper end of the movable bracket 6 passes through the through hole provided on the handle upper shell 12 and contacts with the cam ring surface 131 provided on the inner ring surface of the cam ring shell 13;

[0009] The cam ring housing 13 is rotated, and the size change of the cam ring surface 131 is utilized 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 32 from above.

[0010] Furthermore, a strip groove is provided at the upper end of the movable bracket 6, a rolling pin is provided in the strip groove, and the rolling pin and the cam ring surface 131 are rollingly matched to reduce friction resistance.

[0011] Furthermore: a fixing pin 8 is arranged in the handle upper shell 12, a soft shaft torsion spring 9 is mounted on the rolling pin, and the movable bracket 6 is provided with a bracket extension portion 61, and the bracket extension portion 61 can press or release one end of the soft shaft torsion spring 9 so that it can clamp or release the soft shaft 32 to prevent the soft shaft 32 from popping out.

[0012] Furthermore: a blind hole is provided on the side wall of the annular groove of the handle upper shell 12, a lock pin spring 11 and a lock pin 10 are provided in the blind hole, and ring shell positioning holes 132 are provided at intervals on the side of the cam ring shell 13, and the ring shell positioning holes 132, the lock pin spring 11 and the lock pin 10 constitute the positioning mechanism, and the lock pin 10 is plugged into and matched with different ring shell positioning holes 132 to form different locking shaft force gears.

[0013] Furthermore: an upper shell positioning block 121 is provided in the annular groove of the handle upper shell 12, a lower shell positioning block 331 is provided in the annular groove of the handle lower shell 33, and a ring cover positioning block 341 is provided on the inner ring surface of one side of the cam ring cover 34. The upper shell positioning block 121, the lower shell positioning block 331 and the ring cover positioning block 341 cooperate to constitute the limiting mechanism to limit the rotation limit position of the rotating ring.

[0014] Furthermore, a hollow shaft is provided at the front end of the wheel hub 18, a support baffle is provided in the handle housing, and the support baffle is fastened by connecting bolts and fixing pads 16, so that the rear end of the handle housing is in close contact with the wheel hub 18.

[0015] Furthermore: a shaft sleeve 17 is mounted on the hollow shaft.

[0016] Furthermore, a fixing ring groove is arranged on the inner ring surface of the front end of the handle upper shell 12 and the handle lower shell 33 , a guide ring 1 is arranged in the fixing ring groove, and the front end of the flexible shaft 32 passes through the guide ring 1 .

[0017] Furthermore, the handle upper shell 12 and the cam ring shell 13 are respectively provided with locking marks 19 to indicate unlocking and several gears of the locking shaft force.

[0018] The beneficial effects of the utility model are:

[0019] 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.

[0020] 2. The utility model is provided with unlocking and multiple locking shaft positions, and the locking shaft force increases successively from small to large, realizing multi-level adjustment and having a wide range of applications.

[0021] 3. In the utility model, after the bearing on the sliding bracket leaves the flexible shaft, the flexible shaft torsion spring presses the flexible shaft to prevent the flexible shaft from popping out, thereby avoiding accidents.

[0022] 4. The utility model simplifies the grip handle structure, reduces the size of the front handle and removes unnecessary force. When the setting is completed and used, only gripping force is required. It is easy to operate, easy to promote and implement, and has good economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a dredging machine that controls the tightness of a flexible shaft based on the change in the size of a cam ring surface;

[0024] Figure 2 It is a partial cross-sectional view of a dredging machine that controls the tightness of a flexible shaft based on the change in the size of a cam ring surface;

[0025] Figure 3 for Figure 2 Middle partial enlarged picture;

[0026] Figure 4 It is a partial structural diagram of a dredging machine that controls the tightness of a flexible shaft based on the change in the size of a cam ring surface;

[0027] Figure 5 for Figure 1 Schematic diagram of the structure of the rotating ring;

[0028] Figure 6 for Figure 5 Schematic diagram of the structure of the other end of the rotating ring shown. DETAILED DESCRIPTION

[0029] Example 1: See Figure 1 -- Figure 6 In the figure, 1-guide ring, 2-bearing seat, 4-bearing, 5-bracket spring, 6-movable bracket, 8-fixing pin, 9-flexible shaft torsion spring, 10-locking pin, 11-locking pin spring, 12-handle upper shell, 13-cam ring shell, 16-fixing pad, 17-sleeve, 18-hub, 19-locking mark, 24-hub cover, 31-rotating handle, 32-flexible shaft, 33-handle lower shell, 34-cam ring cover, 61-bracket extension, 121-upper shell positioning block, 131-cam ring surface, 132-ring shell positioning hole, 331-lower shell positioning block, 341-ring cover positioning block.

[0030] A dredging machine for controlling the tightness of a flexible shaft based on the change of the cam ring surface size, comprising a wheel hub 18 and a wheel hub cover 24, which are rotatably connected, a transmission mechanism is provided in the inner cavity of the wheel hub 18, a rotating handle 31 is provided on the wheel hub cover 24, an axial hole is provided through the center of the wheel hub 18 and the wheel hub cover 24, a flexible shaft 32 passes through the axial hole, and the rotating handle 31 rotates and advances the flexible shaft 32 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 18, 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 12 and the handle lower shell 33 being buckled and connected, and the rotating ring is a two-half structure, which is formed by the cam ring housing 13 and the cam ring cover 34 being buckled and connected;

[0031] A bearing seat 2 is provided in the lower shell 33 of the handle, and two bearings 4 are provided on the bearing seat 2. The two bearings 4 support the flexible shaft 32 from below (the two bearings 4 present a certain angle, which is convenient for stably supporting the flexible shaft 32). A movable bracket 6 is provided in the upper shell 12 of the handle, 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 bearing seat 2 (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). The upper end of the movable bracket 6 passes through the through hole provided on the upper shell 12 of the handle (the two are clearance-matched and can slide against each other) and contacts with the cam ring surface 131 provided on the inner ring surface of the cam ring shell 13;

[0032] The cam ring housing 13 is rotated, and the size change of the cam ring surface 131 is utilized 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 32 from above.

[0033] Optimal solution: A strip groove is provided at the upper end of the movable bracket 6, a rolling pin is provided in the strip groove, and the rolling pin and the cam ring surface 131 are rollingly matched to reduce friction resistance.

[0034] A preferred solution is as follows: a fixing pin 8 is provided in the handle upper shell (12); a flexible shaft torsion spring 9 is mounted on the rolling pin; limit blocks are provided at both ends of the flexible shaft torsion spring 9; the movable bracket 6 is provided with a bracket extension portion 61; the bracket extension portion 61 can press or release one end of the flexible shaft torsion spring 9, so that the flexible shaft 32 can be fixed or released, thereby preventing the flexible shaft 32 from popping out.

[0035] Preferred solution: a blind hole is provided on the side wall of the annular groove of the handle upper shell 12, a lock pin spring 11 and a lock pin 10 are provided in the blind hole, and ring shell positioning holes 132 are provided at intervals on the side of the cam ring shell 13. The ring shell positioning holes 132, the lock pin spring 11 and the lock pin 10 constitute a positioning mechanism, and the lock pin 10 is plugged into and matched with different ring shell positioning holes 132 to form different locking shaft force gears.

[0036] Preferred solution: an upper shell positioning block 121 is provided in the annular groove of the handle upper shell 12, a lower shell positioning block 331 is provided in the annular groove of the handle lower shell 33, and a ring cover positioning block 341 is provided on the inner ring surface of one side of the cam ring cover 34. The upper shell positioning block 121, the lower shell positioning block 331 and the ring cover positioning block 341 cooperate to form a limiting mechanism to limit the rotation limit position of the rotating ring.

[0037] Preferred solution: a hollow shaft is provided at the front end of the wheel hub 18, a support partition is provided in the handle housing, and the support partition is fastened by connecting bolts 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.

[0038] Optimal solution: A fixed ring groove is provided on the inner ring surface of the front end of the handle upper shell 12 and the handle lower shell 33 , a guide ring 1 is provided in the fixed ring groove, and the front end of the flexible shaft 32 passes through the guide ring 1 .

[0039] Preferred solution: Lock marks 19 are respectively provided on the handle upper shell 12 and the cam ring shell 13 to indicate unlocking and several gears of the locking shaft force.

[0040] 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 32.

[0041] Locking state: the cam ring housing 13 is rotated, the diameter of the cam ring surface 131 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.

[0042] The cam ring housing 13 is continuously rotated to further press the movable bracket 6 downward, and the bearing 4 on the movable bracket 6 will press the flexible shaft 32 with increased force, thereby forming different clamping force gears.

[0043] Specifically, the bracket extension 61 on the movable bracket 6 presses the flexible shaft torsion spring 9, so that the flexible shaft torsion spring 9 rotates around the limit block at the front end, and the front end leaves the flexible shaft 32. The movable bracket 6 moves upward, and its bracket extension 61 leaves the flexible shaft torsion spring 9, and the front end of the flexible shaft torsion spring 9 returns to press the flexible shaft 32. After the bearing 4 on the movable bracket 6 leaves the flexible shaft 32, the front end of the flexible shaft torsion spring 9 presses the flexible shaft 32 to prevent the flexible shaft 32 from popping out and causing an accident.

[0044] 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 (12) and the handle lower shell (33) are connected by connecting screws, and the cam ring shell (13) and the cam ring cover (34) are connected by connecting screws.

[0045] 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 dredging machine for controlling the tightness of a flexible shaft based on the change in the size of a cam ring surface, comprising a wheel hub (18) and a wheel hub cover (24), the two being rotatably connected, the inner cavity of the wheel hub (18) being provided with a transmission mechanism, the wheel hub cover (24) being provided with a rotating handle (31), a shaft hole being provided through the center of the wheel hub (18) and the wheel hub cover (24), the flexible shaft (32) passing through the shaft hole, the rotating handle (31) causing the flexible shaft (32) to rotate and move forward through the transmission mechanism, wherein: A handle housing is provided at the front end of the wheel hub (18); an annular groove is provided on the outer surface of the front end 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 (12) and a handle lower shell (33) being buckled together; and the rotating ring is a two-half structure, formed by a cam ring shell (13) and a cam ring cover (34) being buckled together; A bearing seat (2) is arranged in the handle lower shell (33), two bearings (4) are arranged on the bearing seat (2), and the two bearings (4) support the flexible shaft (32) from below; a movable bracket (6) is arranged in the handle upper shell (12), another bearing (4) is arranged on the movable bracket (6), a bracket spring (5) is arranged between the lower end of the movable bracket (6) and the bearing seat (2), and the upper end of the movable bracket (6) passes through a through hole arranged on the handle upper shell (12) and contacts a cam ring surface (131) arranged on the inner ring surface of the cam ring shell (13); The cam ring housing (13) is rotated, and the size change of the cam ring surface (131) is utilized to push the movable bracket (6) to move up and down, thereby causing the bearing (4) on the movable bracket (6) to press and loosen the flexible shaft (32) from above.

2. According to claim 1, a dredging machine for controlling the tightness of a flexible shaft based on the change in the size of a cam ring surface, characterized in that: The upper end of the movable bracket (6) is provided with a strip-shaped groove, a rolling pin is provided in the strip-shaped groove, and the rolling pin and the cam ring surface (131) are in rolling engagement to reduce friction resistance.

3. According to claim 1, a dredging machine for controlling the tightness of a flexible shaft based on the change in the size of a cam ring surface, characterized in that: A fixing pin (8) is disposed in the handle upper shell (12), a flexible shaft torsion spring (9) is sleeved on the fixing pin (8), and the movable bracket (6) is provided with a bracket extension portion (61), the bracket extension portion (61) being capable of pressing or releasing one end of the flexible shaft torsion spring (9) so as to fix or release the flexible shaft (32) and prevent the flexible shaft (32) from popping out.

4. According to claim 1, a dredging machine for controlling the tightness of a flexible shaft based on the change in the size of a cam ring surface, characterized in that: A blind hole is provided on the side wall of the annular groove of the handle upper shell (12), a locking pin spring (11) and a locking pin (10) are provided in the blind hole, and ring shell positioning holes (132) are provided at intervals on the side of the cam ring shell (13), the ring shell positioning holes (132), the locking pin spring (11) and the locking pin (10) constitute the positioning mechanism, and the locking pin (10) is plugged into and matched with different ring shell positioning holes (132) to form different locking shaft force gears.

5. According to claim 1, a dredging machine for controlling the tightness of a flexible shaft based on the change in the size of a cam ring surface, characterized in that: An upper shell positioning block (121) is arranged in the annular groove of the handle upper shell (12), a lower shell positioning block (331) is arranged in the annular groove of the handle lower shell (33), and a ring cover positioning block (341) is arranged on an inner ring surface of one side of the cam ring cover (34). The upper shell positioning block (121), the lower shell positioning block (331) and the ring cover positioning block (341) cooperate to form the limiting mechanism to limit the rotation limit position of the rotating ring.

6. The dredging machine for controlling the tightness of a flexible shaft based on the change in the size of a cam ring surface according to claim 1 is characterized in that: A hollow shaft is provided at the front end of the wheel hub (18), a support partition is provided in the handle housing, and the support partition is fastened by connecting bolts and fixing pads (16) so that the rear end of the handle housing is in close contact with the wheel hub (18).

7. The dredging machine for controlling the tightness of a flexible shaft based on the change in the size of a cam ring surface according to claim 6 is characterized in that: A shaft sleeve (17) is mounted on the hollow shaft.

8. The dredging machine for controlling the tightness of a flexible shaft based on the change in the size of a cam ring surface according to claim 1 is characterized in that: A fixing ring groove is provided on the inner annular surfaces at the front ends of the handle upper shell (12) and the handle lower shell (33), a guide ring (1) is provided in the fixing ring groove, and the front end of the flexible shaft (32) passes through the guide ring (1).

9. The dredging machine for controlling the tightness of a flexible shaft based on the change in the size of a cam ring surface according to claim 1 is characterized in that: The handle upper shell (12) and the cam ring shell (13) are respectively provided with locking marks (19) indicating unlocking and several shaft locking force gears.

Images