A pipe de-clogger

Abstract

The application discloses a pipeline dredging machine and belongs to the technical field of electric tools. The pipeline dredging machine comprises a host with a driving assembly arranged therein, a roller with a soft shaft coiled therein, and a guide frame for guiding the soft shaft to advance and retreat. The guide frame comprises an inner seat, an outer cylinder and a locking structure. The locking structure comprises a sliding block, a rotating piece and an elastic piece. The outer cylinder is provided with a contact part. When the outer cylinder rotates forward around a central axis, the contact part moves towards the soft shaft by driving the sliding block to move the rotating piece. When the outer cylinder rotates reversely around the central axis, the contact part releases the sliding block. The elastic piece is arranged to be deformed under stress when the sliding block drives the rotating piece to move towards the soft shaft, and the elastic piece drives the rotating piece to move away from the soft shaft through the sliding block when the contact part releases the sliding block. The specific structure of the guide frame and the locking structure is reasonably arranged, which is beneficial to reasonably simplifying the structure of the guide frame. The sliding block drives the rotating piece to move towards or away from the soft shaft through the forward and reverse rotation of the outer cylinder, and the user is facilitated to operate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric tools, in particular to a pipe dredging machine. BACKGROUND

[0002] In daily life, kitchen, bathroom, flushing toilet and the like are prone to sewer blockage problems, which will bring certain troubles to people's normal life. The dredging machine is a tool for cleaning and dredging sewer pipes through a flexible soft steel wire. According to the driving mode, it can be divided into a manual dredging machine and an electric dredging machine. The existing electric dredging machine generally comprises a soft steel wire, a drum for storing the soft steel wire, and a motor for driving the drum to rotate. When the motor drives the drum to rotate forward, the soft steel wire coiled in the drum moves forward and extends into the sewer pipe. When the motor drives the drum to rotate reversely, the soft steel wire retreats backward and is re-coiled in the drum. In order to avoid the soft steel wire from retreating under force when cleaning the pipe blockage, the dredging machine is generally provided with a locking structure for locking the soft steel wire.

[0003] The patent for invention with publication number CN 106854890 B discloses a soft shaft locking mechanism of a dredging machine and the dredging machine. The soft shaft locking mechanism adopts an elastic locking sheet and a locking ring. The elastic locking sheet comprises a connecting end and a locking end. The locking ring comprises an outer ring and an inner ring. The outer ring drives the inner ring to rotate in the hollow part when rotating. The locking side wall of the inner ring cooperates with the locking end to compress or release the elastic sheet, so as to lock or unlock the soft shaft. In addition, the dredging machine is also provided with a soft shaft telescopic control mechanism. The soft shaft telescopic control mechanism comprises a fixed bearing seat, a movable bearing seat and an operating handle. The operating handle is used to drive the movable bearing seat to rotate. The fixed bearing seat and the movable bearing seat are provided with a first bearing set and a second bearing set which cooperate with each other. The first bearing set drives the soft shaft to advance when cooperating with the soft shaft. The second bearing set drives the soft shaft to retreat when cooperating with the soft shaft, so as to control the advance or retreat of the soft shaft.

[0004] Since the existing dredging machine needs to be provided with a soft shaft locking mechanism and a soft shaft telescopic control mechanism at the same time, the structure of the dredging machine is relatively complex, the production cost of the dredging machine is relatively high, and the overall size of the machine is relatively large, which is not conducive to reasonably simplifying the structure of the dredging machine and improving the portability of the machine body. SUMMARY

[0005] In order to solve the above-mentioned shortcomings and deficiencies in the prior art, the present application provides a pipe dredging machine. The forward and reverse rotation of the outer cylinder realizes the purpose of locking or releasing the soft shaft by the sliding block and the rotating member. The locking structure is reasonably simplified while ensuring the locking strength of the soft shaft.

[0006] In order to achieve the above technical purposes, the pipeline dredging machine provided by the present application comprises a host with a driving assembly arranged therein, a roller driven by the driving assembly and in which a flexible shaft is wound, and a guide frame arranged at the front of the roller and guiding the flexible shaft to advance and retreat, wherein the guide frame comprises an inner seat, an outer cylinder rotatably sleeved on the outer part of the inner seat, and a locking structure capable of locking or releasing the flexible shaft, the flexible shaft passes through the inner seat and extends forward, the locking structure comprises a sliding block arranged on the inner seat, a rotating piece rotatably arranged on the sliding block, and an elastic piece acting on the sliding block, the outer cylinder is provided with a contact part matched with the sliding block, the outer cylinder rotates forward around the central axis to make the contact part move towards the flexible shaft through the sliding block and drive the rotating piece, the outer cylinder rotates reversely around the central axis to release the sliding block from the contact part, and the elastic piece is arranged to be deformed under stress when the sliding block drives the rotating piece to move towards the flexible shaft, and the elastic piece is arranged to move away from the flexible shaft through the sliding block when the contact part releases the sliding block.

[0007] Preferably, the contact part is an arc-shaped contact surface arranged on the inner wall of the outer cylinder and arranged away from the central axis of the outer cylinder, and the distance between the arc-shaped contact surface and the central axis of the outer cylinder increases from one end to the other end.

[0008] Preferably, one end of the arc-shaped contact surface away from the central axis of the outer cylinder is smoothly connected with the inner peripheral wall of the outer cylinder, and / or one end of the arc-shaped contact surface close to the central axis of the outer cylinder is provided with a limiting protruding rib for limiting the sliding block.

[0009] Preferably, the elastic piece comprises a compression spring with one end abutting against the inner seat and the other end abutting against the sliding block.

[0010] Preferably, the inner seat is provided with a sliding groove extending in the radial direction and matched with the sliding block, at least a part of the sliding block is inserted into the sliding groove, and one end of the compression spring abuts against the groove wall of the sliding groove and the other end abuts against the sliding block.

[0011] Preferably, the elastic piece comprises an arc-shaped spring, the sliding block is provided with an arc-shaped groove, and a part of the arc-shaped spring is located in the arc-shaped groove.

[0012] Preferably, the front end of the guide frame is provided with a head assembly, the head assembly comprises a frame head fixed to the front end of the inner seat, a micro switch fixed to the frame head, a movable sleeve movably connected to the frame head and used for triggering the micro switch, and a head spring arranged between the frame head and the movable sleeve, the flexible shaft is provided with a thickened part extending out of the head assembly, and the head spring is arranged to be deformed under pressure when the thickened part abuts against the movable sleeve to drive the movable sleeve to move close to and trigger the micro switch during the retraction of the flexible shaft, and the head spring drives the movable sleeve to move away from the guide frame to release the micro switch when the thickened part is separated from the movable sleeve.

[0013] Preferably, the head assembly is provided with a scraping piece located on the outer periphery of the flexible shaft and used for scraping the flexible shaft, and / or the front end of the outer cylinder is sleeved on the outer periphery of the frame head, and the outer cylinder and the frame head are provided with a limiting structure for limiting the outer cylinder.

[0014] Preferably, the sliding blocks are evenly spaced along the circumference of the inner seat, and each sliding block is provided with a rotating member; and / or the rotating member is a bearing.

[0015] Preferably, the sliding block is provided with a mounting surface that is axially inclined relative to the guide frame and is used to mount the rotating member, and the rotating member is rotatably mounted on the mounting surface and the axial direction of the rotating member is perpendicular to the mounting surface.

[0016] After adopting the above technical solution, the present application has the following advantages:

[0017] 1. The pipe dredging machine provided by the present application is provided with a locking structure that can lock or release the flexible shaft. When the outer cylinder is rotating forward, the abutting portion drives the rotating member to move towards the flexible shaft through the sliding block, and the elastic member is deformed under stress, so that the rotating member can clamp or lock the flexible shaft. The clamping of the rotating member on the flexible shaft enables the flexible shaft to smoothly move forward into the pipe or move backward to retract into the drum, which is conducive to improving the movement stability of the flexible shaft. The locking of the rotating member on the flexible shaft can keep the structure stable when the flexible shaft is cleaning dirt in the pipe, thereby avoiding the backward retraction of the flexible shaft under stress, and enabling the flexible shaft to smoothly dredge the pipe. When the abutting portion releases the sliding block, the elastic member that has recovered from deformation drives the rotating member to move away from the flexible shaft through the sliding block, so that the rotating member releases the flexible shaft, thereby enabling the flexible shaft to move smoothly. Reasonable arrangement of the specific structure of the guide frame and the locking structure is conducive to simplifying the structure of the guide frame. Through forward and reverse rotation of the outer cylinder, the sliding block can drive the rotating member to move towards or away from the flexible shaft, which is convenient for users to operate. In addition, the locking strength of the locking structure on the flexible shaft is high, which can better meet the locking requirements of the flexible shaft, and is conducive to improving the operation experience of users.

[0018] 2. The abutting portion is preferably an arc-shaped abutting surface that is arranged centrifugally relative to the central axis of the outer cylinder. When the arc-shaped abutting surface follows the rotation of the outer cylinder, it can smoothly abut or release the sliding block, so that the sliding block can smoothly drive the rotating member to move towards or away from the flexible shaft. Reasonable arrangement of the specific structure of the abutting portion meets the structural requirements of the sliding block driving the rotating member to lock or release the flexible shaft.

[0019] 3. The end of the arc-shaped abutting surface away from the central axis of the outer cylinder is smoothly connected to the inner circumferential wall of the outer cylinder, so that the sliding block can be switched to cooperate with the inner wall of the outer cylinder or the arc-shaped abutting surface when the outer cylinder is rotating, so that the arc-shaped abutting surface can smoothly drive the rotating member to move towards the flexible shaft through the sliding block, thereby enabling the rotating member to effectively clamp or lock the flexible shaft.

[0020] The arc-shaped abutting surface is provided with a limiting protruding rib at the end close to the central axis of the outer cylinder, which limits the movement amplitude range of the sliding block relative to the arc-shaped abutting surface, avoids the situation that the sliding block moves too much and separates from the arc-shaped abutting surface, and ensures the cooperation stability between the sliding block and the arc-shaped abutting surface.

[0021] 4. The elastic element includes a compression spring. When the slider drives the rotating part to move towards the flexible shaft, the compression spring is compressed. When the contact part releases the slider, the restored compression spring drives the slider to move away from the flexible shaft. The slider then drives the rotating part to move synchronously, causing the rotating part to release the flexible shaft. The specific structure of the elastic element should be reasonably designed to meet the requirement of releasing the flexible shaft by having the slider drive the rotating part to move away from the flexible shaft.

[0022] 5. The slider is partially inserted into the groove of the inner seat. The groove can limit the movement of the slider, so that the slider can only move along the extension direction of the groove. This improves the stability of the slider when it drives the rotating part to move towards or away from the flexible shaft, and can improve the locking stability of the locking structure on the flexible shaft.

[0023] 6. The elastic element includes an arc-shaped spring, with a portion of the ring spring located within the arc-shaped groove of the slider. When the slider, under the action of the contact part, drives the rotating component to move towards the flexible shaft, the arc-shaped spring deforms under force. When the contact part releases the slider, the deformed arc-shaped spring drives the slider to move away from the flexible shaft, and the slider drives the rotating component to move synchronously, causing the rotating component to release the flexible shaft. The specific structure of the elastic element should be rationally designed to meet the requirement of releasing the flexible shaft by driving the rotating component to move away from the flexible shaft via the slider.

[0024] 7. A head assembly is installed at the front end of the guide frame. After the flexible shaft retracts to the point where the thickened part contacts the movable sleeve, the thickened part continues to retract, driving the movable sleeve to move backward and closer to the guide frame. The backward-moving movable sleeve applies force to the head spring, causing it to deform. When the movable sleeve triggers the microswitch, the movable sleeve moves backward into position, indicating that the flexible shaft has retracted to the correct position. The drive assembly stops driving, and the flexible shaft stops retracting, avoiding structural deformation caused by excessive retraction of the flexible shaft. When the flexible shaft moves forward, causing the thickened part to release the movable sleeve, the head spring, recovering its deformation, drives the movable sleeve forward and away from the guide frame, thereby releasing the microswitch. The specific structure of the head assembly is reasonably designed so that it can generate a timely position signal when the flexible shaft retracts to the correct position, allowing the drive assembly to stop driving promptly.

[0025] 8. The flexible shaft is equipped with a scraper on its outer periphery. During the retraction of the flexible shaft, the scraper scrapes the flexible shaft to remove dirt carried on it, improving the cleanliness of the flexible shaft when it retracts into the drum. This prevents dirt from entering the drum along with the flexible shaft, thus avoiding the generation of odors or mold inside the drum, improving the overall cleanliness of the machine, and enhancing the user experience.

[0026] A limiting structure is set between the outer cylinder and the frame head. The limiting structure restricts the outer cylinder in the circumferential direction, preventing the outer cylinder from retracting when the locking structure clamps the flexible shaft, which would cause the arc-shaped contact surface to loosen the slider. This helps to improve the locking stability of the locking structure for the flexible shaft.

[0027] 9、The plurality of sliders are evenly spaced along the circumference of the inner seat, each slider is provided with a rotating member, and the specific structure of the locking structure is reasonably arranged, which is conducive to improving the locking strength and stability of the locking structure on the flexible shaft. The rotating member can be a bearing, and the specific structure of the rotating member is reasonably arranged, which is conducive to reasonably simplifying the locking structure.

[0028] 10、The rotating member is rotatably arranged on the mounting surface of the slider, and the axial direction of the rotating member is perpendicular to the mounting surface. Since the mounting surface on the slider is arranged obliquely relative to the axial direction of the guide frame, the axial direction of the rotating member is also arranged obliquely relative to the axial direction of the guide frame. The mounting structure of the rotating member is reasonably arranged, so that the rotating member can effectively lock or release the flexible shaft. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a whole machine diagram of the pipe dredging machine of the first embodiment;

[0030] Figure 2 It is an exploded view of the pipe dredging machine of the first embodiment;

[0031] Figure 3 It is a partial structure diagram of the main machine in the pipe dredging machine of the first embodiment;

[0032] Figure 4 It is a partial structure diagram of the pipe dredging machine of the first embodiment;

[0033] Figure 5 It is an exploded view of the guide frame in the pipe dredging machine of the first embodiment;

[0034] Figure 6 It is a partial structure diagram of the guide frame in the pipe dredging machine of the first embodiment along the vertical direction perpendicular to the axial direction;

[0035] Figure 7 It is a structure diagram of the slider, the rotating member and the compression spring in the pipe dredging machine of the first embodiment;

[0036] Figure 8 It is a structure diagram of the slider in the pipe dredging machine of the first embodiment;

[0037] Figure 9 It is a structure diagram of the inner seat in the pipe dredging machine of the first embodiment;

[0038] Figure 10 It is a structure diagram of the outer cylinder in the pipe dredging machine of the first embodiment;

[0039] Figure 11 It is an end view of the outer cylinder in the pipe dredging machine of the first embodiment;

[0040] Figure 12 It is an exploded view of the head assembly in the pipe dredging machine of the first embodiment;

[0041] Figure 13Figure 1 is a schematic view of the cooperation structure of the head assembly and the guide frame in the pipe dredging machine of Example 1;

[0042] Figure 14 Figure 2 is a schematic view of the partial structure of the front end of the outer cylinder in the pipe dredging machine of Example 1;

[0043] Figure 15 Figure 3 is a schematic view of the cooperation structure of the head assembly and the guide frame in the pipe dredging machine of Example 2.

[0044] In the figure, 100-main machine, 110-machine shell, 101-handle part, 200-driving assembly, 210-motor, 220-reducer, 230-coupler, 231-supporting sleeve, 232-coupling shaft, 300-roller, 310-front cover, 320-back plate, 330-through opening, 400-flexible shaft, 410-thickened part, 500-guide frame, 510-inner seat, 511-fixing part, 512-sliding slot, 513-gap, 520-outer cylinder, 521-flared part, 522-arc-shaped abutting surface, 522a-near end, 522b-far end, 523-limiting protrusion, 524-limiting slot, 524a-first slot segment, 524b-second slot segment, 530-locking structure, 531-sliding block, 5311-convex part, 5312-mounting surface, 5313-mounting hole, 5314-groove, 5315-positioning column, 5316-arc-shaped slot, 5317-cylindrical part, 532-rotating part, 540-inner sleeve, 541-through hole, 551-compression spring, 552-arc-shaped spring, 600-enclosure, 610-front enclosure body, 611-center hole, 620-back enclosure body, 700-head assembly, 710-frame head, 711-recessed hole, 720-micro switch, 730-movable sleeve, 740-head spring, 750-shoulder screw, 760-metal tongue, 771-column sleeve, 772-limiting ball, 773-limiting spring, 780-scraping part. DETAILED DESCRIPTION

[0045] The application will be further described below in conjunction with the drawings and specific examples. It should be understood that the following "upper", "lower", "left", "right", "longitudinal", "transverse", "inner", "outer", "vertical", "horizontal", "top", "bottom" and other words indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices / components must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the application.

[0046] Example 1

[0047] In combination Figures 1 to 14The pipeline dredging machine provided by the embodiment one of the present application comprises a host 100 internally provided with a driving assembly 200, a roller 300 driven by the driving assembly 200 and provided with a soft shaft 400 wound thereon, and a guide frame 500 provided at the front of the roller 300 and guiding the soft shaft 400 to advance and retreat. The guide frame 500 comprises an inner seat 510, an outer cylinder 520 rotatably sleeved on the outer part of the inner seat 510, and a locking structure 530 capable of locking or releasing the soft shaft 400. The soft shaft 400 passes through the inner seat 510 and extends outward. The locking structure 530 comprises a sliding block 531 provided on the inner seat 510, a rotating piece 532 rotatably provided on the sliding block 531, and an elastic piece acting on the sliding block 531. The outer cylinder 520 is provided with an abutting part matched with the sliding block 531. The outer cylinder 520 rotates forward around the central axis to make the abutting part move the rotating piece 532 toward the soft shaft 400 through the sliding block 531. The outer cylinder 520 rotates reversely around the central axis to release the sliding block 531. The elastic piece is arranged to be deformed under stress when the sliding block 531 moves the rotating piece 532 toward the soft shaft 400, and to move the rotating piece 532 away from the soft shaft 400 through the sliding block 531 when the abutting part releases the sliding block 531.

[0048] When the outer cylinder rotates forward, the abutting part moves the rotating piece toward the soft shaft through the sliding block and deforms the elastic piece under stress, so that the rotating piece can clamp or lock the soft shaft. The rotating piece clamping the soft shaft enables the soft shaft to smoothly move forward into the pipeline or retreat backward to retract into the roller, which is beneficial to improve the movement stability of the soft shaft. The rotating piece locking the soft shaft can keep the structure stable when the soft shaft is cleaning dirt in the pipeline, so as to avoid the soft shaft from retreating and retracting under stress, and enable the soft shaft to smoothly dredge the pipeline. When the abutting part releases the sliding block, the deformed elastic piece moves the rotating piece away from the soft shaft through the sliding block, so that the rotating piece releases the soft shaft, so that the soft shaft can move smoothly. Reasonably arranging the specific structure of the guide frame and the locking structure is beneficial to reasonably simplify the structure of the guide frame. The forward and reverse rotation of the outer cylinder can make the sliding block move the rotating piece toward or away from the soft shaft, which is convenient for users to operate. In addition, the locking strength of the locking structure to the soft shaft is high, which can better meet the locking requirements of the soft shaft, and is beneficial to improve the operation experience of users.

[0049] In combination Figure 3 In the embodiment, the host 100 comprises a machine shell 110, the machine shell 110 is formed with a handle part 101, the driving assembly 200 comprises a motor 210, a speed reducer 220 and a coupling 230 arranged in sequence from back to front, the coupling 230 comprises a support sleeve 231 fixed to the front end of the machine shell 110 and a coupling shaft 232 rotatably arranged in the support sleeve 231, the rear end of the coupling shaft 232 is in transmission connection with the output shaft of the speed reducer 220, and the front end of the coupling shaft 232 extends out of the support sleeve 231 and is in transmission cooperation with the roller 300.

[0050] In combination Figure 2The pipe dredging machine further comprises a cover 600 arranged at the front end of the main machine 100, the cover 600 comprises a front cover body 610 and a rear cover body 620 fixed together, the rear cover body 620 is sleeved on the outside of the front end of the main machine 100, the guide frame 500 is arranged at the front side of the front cover body 610, and the roller 300 is rotatably arranged in the cover 600. The roller 300 comprises a front cover 310 and a rear plate 320 fixed together and forming an inner cavity, the center of the front cover 310 is provided with a through hole 330 for the soft shaft 400 to move in and out, the center of the front cover body 610 is provided with a center hole 611 for the soft shaft 400 to pass through, and the center of the rear plate 320 is provided with a transmission hole for the front end of the connecting shaft 232 to be inserted into, the front end of the connecting shaft 232 and the transmission hole adopt a hexagonal shaft hole matching structure, and the rotating connecting shaft 232 drives the roller 300 to rotate synchronously through the matching with the transmission hole. It can be understood that the front end of the connecting shaft 232 and the transmission hole in the center of the rear plate 320 can also adopt a rectangular shaft hole matching structure, an oblate shaft hole matching structure, a spline shaft hole matching structure or other non-circular shaft hole matching structures to realize transmission matching.

[0051] In combination Figure 4 , Figure 5 The soft shaft 400 is made of spring steel wire, and the inner seat 510 is hollow. The guide frame 500 further comprises a metal inner sleeve 540, the inner sleeve 540 is fixed to the rear end of the inner seat 510 and has a through hole 541 for the soft shaft 400 to pass through, and the metal inner sleeve 540 reduces the abrasion of the inner seat 510 caused by the movement of the soft shaft 400.

[0052] In combination Figure 6 In the embodiment, a plurality of sliding blocks 531 are uniformly and spacedly arranged along the circumference of the inner seat 510, and each sliding block 531 is provided with a rotating piece 532. Figure 9 The rear end of the inner seat 510 is provided with a fixed portion 511 for abutting and matching with the front cover body 610, the front side of the fixed portion 511 is provided with three sliding grooves 512 uniformly and spacedly distributed along the circumference and extending along different radial directions, and the rear end of each sliding block 531 is inserted into the corresponding sliding groove 512. The sliding block 531 is limited when moving through the sliding groove 512, and the sliding block 531 can only move along the sliding groove 512 under force, thereby improving the stability of the sliding block 531 and the rotating piece 532 when moving towards or away from the soft shaft 400.

[0053] In combination Figure 7 , Figure 8The slider 531 is provided with a boss part 5311 for mounting the rotating part 532 and protruding towards the shaft center of the guide frame 500, the front side or the rear side of the boss part 5311 is provided with a mounting surface 5312 which is arranged to be inclined relative to the axial direction of the guide frame 500, the rotating part 532 is rotatably arranged on the mounting surface 5312, and the axial direction of the rotating part 532 is arranged to be perpendicular to the mounting surface 5312. In this embodiment, the rotating part 532 preferably adopts a metal bearing which is rotatably arranged on the mounting surface 5312 by means of a screw, the boss part 5311 is provided with a mounting hole 5313 which cooperates with the screw, the axial direction of the mounting hole 5313 is arranged to be perpendicular to the mounting surface 5312, the rear end of the inner seat 510 is provided with a gap 513 for avoiding the rotating part 532, and the rotating part 532 can extend into the inner seat 510 from the gap 513 so as to clamp the flexible shaft 400. It can be understood that the inclination angle γ of the mounting surface 5312 relative to the axial direction of the guide frame 500 can be set to 40°, 45°, 50°, 55°, 60°, 65°, 70° or other reasonable sizes, and is not limited here.

[0054] In combination with Figure 6 , Figure 7The elastic member includes a compression spring 551 and an arc spring 552. One end of the compression spring 551 abuts against the inner seat 510, and the other end abuts against the sliding block 531. The arc spring 552 is arranged at the front end of the sliding block 531 and cooperates with all the sliding blocks 531. In this embodiment, the compression spring 551 is arranged on the side of the sliding block 531 facing the shaft center of the guide frame 500. The compression spring 551 is arranged in one-to-one correspondence with the sliding block 531. The sliding block 531 is provided with a recess 5314 on the side facing the shaft center of the guide frame 500. The recess 5314 is provided with a positioning column 5315 protruding toward the shaft center of the guide frame 500. One end of the compression spring 551 abuts against the groove wall on the side of the sliding groove 512 facing the shaft center of the guide frame 500 to abut against the inner seat 510. The other end of the compression spring 551 is sleeved on the positioning column 5315 and abuts against the sliding block 531. The front surface of each sliding block 531 is provided with an arc-shaped groove 5316. The arc spring 552 is partially arranged in the arc-shaped groove 5316 of each sliding block 531 in correspondence with the arc-shaped portion of each sliding block 531. When each sliding block 531 drives the rotating member 532 to move toward the soft shaft 400, the compression spring 551 and the arc spring 552 are deformed under force. When the abutting portion releases the sliding block 531, the compression spring 551 and the arc spring 552, which are restored to the original shape, drive the sliding block 531 to move away from the soft shaft 400, so that the rotating member 532 moves away from the soft shaft 400. It can be understood that the arc-shaped groove 5316 on each sliding block 531, which cooperates with the arc spring 552, can be arranged at other positions of the sliding block 531, such as the surface of the sliding block 531 facing the shaft center of the guide frame 500. Here, it is not limited too much, as long as it meets the requirements of cooperation with the arc spring 552 and can drive the sliding block 531 to reset. In addition, under the premise that the compression spring 551 meets the requirement of driving the sliding block 531 to reset, the arc spring 552 can be cancelled, that is, only the compression spring 551 is arranged as the elastic member.

[0055] In combination Figure 10 , Figure 11In the embodiment, the interference part is an arc interference surface 522 arranged on the inner wall of the outer cylinder 520 and arranged away from the central axis of the outer cylinder 520, and the distance between the arc interference surface 522 and the central axis of the outer cylinder 520 increases from one end to the other end. Specifically, the rear end of the outer cylinder 520 is provided with a flared portion 521 matched with the fixed part 511, the arc interference surface 522 is arranged on the inner wall of the flared portion 521, the arc interference surface 522 is distributed one-to-one with the sliding block 531 and uniformly spaced along the circumference of the flared portion 521. The arc interference surface 522 has a distal end 522b away from the central axis of the outer cylinder 520 and a proximal end 522a close to the central axis of the outer cylinder 520, the distal end 522b of the arc interference surface 522 is smoothly connected with the inner circumferential wall of the flared portion 521, so that the sliding block 531 can smoothly cooperate with the arc interference surface 522 when the outer cylinder 520 rotates. In order to avoid the sliding block 531 from disengaging from the arc interference surface 522, the proximal end 522a of the arc interference surface 522 is provided with a limiting protruding rib 523 protruding towards the axis of the outer cylinder 520.

[0056] In order to reduce the friction between the sliding block 531 and the arc interference surface 522, the sliding block 531 is provided with a cylindrical portion 5317 matched with the arc interference surface 522 on the side facing the arc interference surface 522, and the cylindrical portion 5317 is in interference fit with the arc interference surface 522. When the outer cylinder 520 rotates in the forward direction and the sliding block 531 moves relative to the arc interference surface 522 to interfere with the limiting protruding rib 523, the sliding block 531 drives the rotating member 532 to move to the position of the soft shaft 400, and the distance between the rotating member 532 and the soft shaft 400 is the smallest, at this time, each rotating member 532 cooperates to clamp the soft shaft 400, and the soft shaft 400 cannot advance or retreat.

[0057] In combination with Figure 12 , Figure 13The front end of the guide frame 500 is provided with a head assembly 700, which comprises a frame head 710 fixed to the front end of the inner seat 510, a micro switch 720 fixed to the frame head 710, a movable sleeve 730 movably connected to the frame head 710 and used for triggering the micro switch 720, a head spring 740 arranged between the frame head 710 and the movable sleeve, the soft shaft 400 passes through the head assembly 700 and is provided with the thickened portion 410 extending out of the head assembly 700, the movable sleeve 730 and the frame head 710 are arranged at the front end of the inner seat 510 through a shaft shoulder screw 750, the frame head 710 is fixed to the front end of the inner seat 510, the movable sleeve 730 is movably arranged at the front end of the inner seat 510, the head spring 740 is located outside the soft shaft 400, the rear end of the head spring 740 is in abutment with a stepped surface on the inner wall of the frame head 710 to realize positioning, and the front end of the head spring 740 is in abutment with the movable sleeve 730. In the embodiment, the micro switch 720 is connected with a control module of the machine body, after the soft shaft 400 is retracted to the thickened portion 410 and is in abutment with the movable sleeve 730, the thickened portion 410 continues to retract backward and drives the movable sleeve 730 to move backward and approach the guide frame 500, the movable sleeve 730 exerts force on the head spring 740 to make the head spring 740 be deformed under pressure when the movable sleeve 730 triggers the micro switch 720. When the movable sleeve 730 is moved to the position, it is indicated that the soft shaft 400 is retracted to the position, the control module commands the driving assembly 200 to stop working according to the triggering signal of the micro switch 720, and the soft shaft 400 stops retracting to avoid structural deformation caused by excessive retraction of the soft shaft 400. When the soft shaft 400 moves forward and makes the thickened portion 410 release the movable sleeve 730, the head spring 740 which restores deformation drives the movable sleeve 730 to move forward and away from the guide frame 500, so that the movable sleeve 730 releases the micro switch 720. It can be understood that the micro switch 740 can be fixed outside the frame head 710, a button can be arranged on the front side of the micro switch 740, and the movable sleeve 730 is pressed to trigger the micro switch when the movable sleeve 730 is moved to the position. Of course, the triggering mode of the micro switch 740 is not limited to this, and other reasonable triggering modes can also be adopted.

[0058] In order to avoid that the soft shaft 400 made of metal directly contacts the movable sleeve 730 and causes the movable sleeve 730 to be seriously worn, a plurality of metal tongue pieces 760 are fixed on the movable sleeve 730 and are distributed in the circumferential direction, each metal tongue piece 760 is combined to form a hole through which the soft shaft 400 passes, and the inner diameter of the hole is smaller than the outer diameter of the thickened portion 410. When the soft shaft 400 is retracted, the thickened portion 410 is in abutment with the metal tongue piece 760 and drives the movable sleeve 730 to move backward to trigger the micro switch 720.

[0059] The rear part of the frame head 710 is sleeved outside the front end of the inner seat 510, and the front end of the outer cylinder 520 is sleeved outside the rear part of the frame head 710. In order to keep the stable cooperation state of the arc-shaped abutting surface 522 and the sliding block 531 when the rotating part 532 clamps the flexible shaft 400, the outer cylinder 520 needs to be kept stable in the circumferential direction. Therefore, the limiting structure for limiting the circumferential direction of the outer cylinder 520 is arranged between the outer cylinder 520 and the frame head 710. In combination with Figure 12 , Figure 13 In the embodiment, the circumferential outer wall of the frame head 710 is provided with a recess hole 711 extending along a certain radial direction, the recess hole 711 is provided with a column sleeve 771, the column sleeve 771 is provided with a limiting ball 772 and a limiting spring 773, part of the limiting ball 772 is exposed from the column sleeve 771, one end of the limiting spring 773 is in abutment with the inner wall of the column sleeve 771 to realize positioning, and the other end of the limiting spring 773 is in abutment with the limiting ball 772. In combination with Figure 14 , the inner wall of the front end of the outer cylinder 520 is provided with a limiting groove 524 matched with the limiting ball 772, the limiting groove 524 includes first groove segments 524a and second groove segments 524b distributed in the circumferential direction, the first groove segments 524a have a larger curvature, and the second groove segments 524b have a smaller curvature. When the sliding block 531 drives the rotating part 532 to move towards the flexible shaft 400 to clamp the flexible shaft 400, the limiting ball 772 is matched with the second groove segments 524b to limit the circumferential direction of the outer cylinder 520, so that the outer cylinder 520 is prevented from rotating in the circumferential direction to loosen the sliding block 531, and the rotating part 532 is prevented from moving away from the flexible shaft 400 under the elastic force of the elastic part to loosen the flexible shaft 400.

[0060] When the machine body works, the driving assembly 200 drives the roller 300 to rotate around the central axis in the positive direction, the rotation of the roller 300 drives the flexible shaft 400 wound inside to move forward, at this time, the rotating part 532 clamps the flexible shaft 400 but does not clamp tightly, and the rotating part 532 can rotate when the flexible shaft 400 moves forward.

[0061] When the flexible shaft 400 moves forward to a proper length, the user applies force to the outer cylinder 520 to make it rotate in the positive direction around the central axis, the sliding block 531 moves from the distal end 522b to the proximal end 522a relative to the arc-shaped abutting surface 522, so that the sliding block 531 drives the rotating part 532 to move towards the flexible shaft 400, and the outer cylinder 520 rotates to the position where the limiting ball 772 is matched with the second groove segments 524b, at this time, the rotating part 532 clamps the flexible shaft 400, so that the flexible shaft 400 cannot move forward or backward.

[0062] When the soft shaft 400 needs to be retracted after the unclogging is completed, the user applies force to the outer cylinder 520 to make it reverse around the central axis, the slider 531 moves from the proximal end 522a to the distal end 522b relative to the arc-shaped abutting surface 522, the arc-shaped abutting surface 522 releases the slider 531, the compressed spring 551 and the arc-shaped spring 552 that are deformed drive the slider 531 to move away from the soft shaft 400, the slider 531 drives the rotating member 532 to move away from the soft shaft 400, so that the rotating member 532 releases the soft shaft 400, at this time, the limiting ball 772 switches to cooperate with the first groove segment 524a.

[0063] Then, the driving assembly 200 is started, the driving assembly 200 reversely drives the roller 300 to rotate around the central axis, the rotation of the roller 300 makes the soft shaft 400 retreat backward and rewind in the roller 300, in the process of the retreat of the soft shaft 400, the rotating member 532 clamps the soft shaft 400 but does not clamp tightly, the rotating member 532 can rotate when the soft shaft 400 retreats backward. When the thickened part 410 of the soft shaft 400 contacts the metal tongue 760 after the retreat, the thickened part 410 that continues to retreat backward drives the movable sleeve 730 to move backward and close to the guide frame 500, the movable sleeve 730 that moves backward applies force to the head spring 740 to make the head spring 740 be compressed and deformed. When the movable sleeve 730 triggers the micro switch 720, the movable sleeve 730 moves backward to the position, which indicates that the soft shaft 400 retreats to the position, the driving assembly 200 stops driving, and the retreat of the soft shaft 400 stops.

[0064] It can be understood that the micro switch 740 can also be a magnetic induction switch, at this time, a magnet for triggering the magnetic induction switch can be arranged on the movable sleeve 730.

[0065] Embodiment Two

[0066] In combination Figure 15 In order to avoid dirt following the soft shaft 400 into the roller 300, the head assembly 700 is provided with a dirt scraping member 780 located on the outer periphery of the soft shaft 400 and used for scraping the soft shaft 400. In this embodiment, the dirt scraping member 780 is arranged on the front side of the metal tongue 760, the dirt scraping member 780 is annular, and brush hairs that contact the soft shaft 400 are arranged on the inner peripheral wall of the dirt scraping member 780. When the soft shaft 400 retreats, the brush hairs scrape the soft shaft 400 to remove the dirt carried by the soft shaft 400, improve the cleanliness of the soft shaft 400 when the soft shaft 400 retreats into the roller 300, and thus avoid the generation of odor or mold in the roller 300.

[0067] Of course, the specific structure of the scraping member 780 is not limited to the above description and the drawings shown, for example, the scraping member 780 can also adopt a scraping sleeve with elasticity, the scraping sleeve is fixed in the head assembly and located at the outer periphery of the flexible shaft 400, a plurality of scraping ribs are arranged on the inner peripheral wall of the scraping sleeve and distributed in the axial direction and in contact with the flexible shaft 400, when the flexible shaft 400 retreats, the scraping ribs scrape the flexible shaft 400 to remove the dirt carried by the flexible shaft 400.

[0068] The other structures of the second embodiment are the same as those of the first embodiment, which will not be described here.

[0069] In addition to the preferred embodiments described above, the present application has other embodiments, and those skilled in the art can make various changes and modifications according to the present application, as long as they do not deviate from the spirit of the present application, they should belong to the scope defined in the claims of the present application.

Claims

1. A pipe dredging machine comprising a main body in which a driving assembly is installed, a drum to which a flexible shaft is wound and which is driven by the driving assembly, and a guide frame provided at a front portion of the drum and guiding the flexible shaft to be advanced and retracted, characterized in that, The guiding frame comprises an inner seat, an outer cylinder rotatably sleeved outside the inner seat, and a locking structure capable of locking or releasing the flexible shaft, the flexible shaft passes through the inner seat and extends forward, the locking structure comprises a sliding block arranged on the inner seat, a rotating member rotatably arranged on the sliding block, and an elastic member acting on the sliding block, the outer cylinder is provided with an abutting portion matched with the sliding block, the outer cylinder rotates in a forward direction around the central axis to make the abutting portion move towards the flexible shaft through the sliding block and the rotating member, the outer cylinder rotates in a reverse direction around the central axis to make the abutting portion release the sliding block, and the elastic member is arranged to be deformed under stress when the sliding block drives the rotating member to move towards the flexible shaft, and the elastic member is arranged to be deformed under stress when the sliding block drives the rotating member to move away from the flexible shaft through the abutting portion. The abutting portion is an arc-shaped abutting surface arranged on the inner wall of the outer cylinder and arranged away from the central axis of the outer cylinder, and the distance between the arc-shaped abutting surface and the central axis of the outer cylinder increases from one end to the other end. The inner seat is provided with a sliding groove extending in the radial direction and matched with the sliding block, and at least a part of the sliding block is inserted into the sliding groove.

2. A pipe de-clogger according to claim 1, wherein, The arc-shaped abutting surface is smoothly connected to the inner wall of the outer cylinder at the end away from the central axis of the outer cylinder, and / or the arc-shaped abutting surface is provided with a limiting protruding rib for limiting the sliding block at the end close to the central axis of the outer cylinder.

3. A pipe de-clogger according to claim 1, wherein, The elastic member comprises a compression spring abutting at one end to the inner seat and at the other end to the sliding block.

4. A pipe de-clogger according to claim 3, wherein, One end of the compression spring abuts to the groove wall of the sliding groove, and the other end abuts to the sliding block.

5. A pipe de-clogger according to claim 3, wherein, The elastic member comprises an arc-shaped spring, the sliding block is provided with an arc-shaped groove, and a part of the arc-shaped spring is located in the arc-shaped groove.

6. A plumbing machine according to claim 1, wherein, The front end of the guiding frame is provided with a head assembly, the head assembly comprises a frame head fixed to the front end of the inner seat, a micro switch fixed to the frame head, a movable sleeve movably connected to the frame head and used for triggering the micro switch, and a head spring arranged between the frame head and the movable sleeve, the flexible shaft is provided with a thickened portion extending out of the head assembly, the head spring is arranged to be deformed under pressure when the thickened portion abuts to the movable sleeve to drive the movable sleeve to move close to and trigger the micro switch during the retraction of the flexible shaft, and the head spring is arranged to drive the movable sleeve to move away from the guiding frame to release the micro switch when the thickened portion moves away from the movable sleeve.

7. A pipe de-clogger according to claim 6, wherein, The head assembly is provided with a scraping member located on the outer periphery of the flexible shaft and used for scraping the flexible shaft, and / or the front end of the outer cylinder is sleeved on the outer periphery of the frame head, and the outer cylinder and the frame head are provided with limiting structure for limiting the circumferential direction of the outer cylinder.

8. A pipe de-clogger according to claim 1, wherein, The sliding blocks are uniformly and spacedly arranged in the circumferential direction of the inner seat, and the rotating members are arranged on each sliding block; and / or the rotating members are bearings.

9. A plumbing machine according to claim 1, wherein, The sliding blocks are provided with mounting surfaces arranged in an axial direction of the guiding frame and used for mounting the rotating members, and the rotating members are rotatably arranged on the mounting surfaces and the axial direction of the rotating members is perpendicular to the mounting surfaces.

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