A portable and mobile pipe cleaning machine and its usage method

Abstract

This invention relates to a portable, mobile pipe cleaning machine and its usage method, belonging to the field of pipe cleaning equipment. The invention includes a frame and a housing, with the housing mounted on the frame. Its structural features include a clamping system, a protective tube structure, a tensioning structure, and a drive mechanism. The clamping system is located inside the housing, the protective tube structure is located at the rear of the housing, the tensioning structure is located at the bottom of the housing, and the drive mechanism is mounted on the tensioning structure and connected to the clamping system. The clamping system includes a clamping assembly and a clutch assembly, both of which are fitted onto a flexible shaft sleeve, and the clamping assembly cooperates with the clutch assembly. The clutch assembly includes a fixed seat, a clutch retainer, and a clutch top ring. The fixed seat is mounted on the housing, the clutch retainer is mounted on the fixed seat, and the clutch top ring is mounted on the clutch retainer, cooperating with the clamping assembly.

Description

Technical Field

[0001] This invention relates to a portable and mobile pipe cleaning machine and its usage method, belonging to the field of pipe cleaning equipment. Background Technology

[0002] A pipe cleaning machine is a tool used to unclog household main drainage pipes and outdoor sewer pipes. During operation, the flexible shaft transmits torque to the cutter head. When the flexible shaft swings forward in the pipe, if it cannot be fully gripped, the swing amplitude increases. This increased swing amplitude reduces the flexible shaft's ability to unclog pipes. When the pipe wall is thin, it can easily crack, leading to leaks. Currently, changing the flexible shaft model also requires replacing the clamping system components. The types of pipes that can be unclogged and the unclogging distance are limited. This type of equipment has low versatility and weak unclogging ability, making it difficult to unclog pipes.

[0003] In view of this, patent application No. 201822080058.8 discloses a shaft clamping device for a pipe cleaning machine. The pipe cleaning machine in the above-mentioned prior art can clamp the same specification of flexible shaft, which has poor versatility and is inconvenient to control the clamping assembly. In view of this, patent application No. 201921479553.4 discloses a protective tube suitable for a pipe cleaning machine. The above-mentioned prior art uses a pin 2 to fix the protective tube, which has poor stability and the protective tube is easy to fall off when the flexible shaft rotates inside the protective tube. In view of this, patent application No. 202121726403.6 discloses a transmission mechanism for a pipe cleaning machine. The above-mentioned prior art uses a tensioning wheel assembly B4 to adjust the belt B3, which requires the tensioning wheel assembly B4 to be set on the side of the belt B3, which occupies a large space. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings in the prior art and to provide a portable and mobile pipe cleaning machine with a reasonable structural design and a method of use.

[0005] The technical solution adopted by this invention to solve the above problems is as follows: This portable and mobile pipe cleaning machine includes a frame and a cover, with the cover mounted on the frame. Its structural features include a shaft-holding system, a protective tube structure, a tensioning structure, and a drive mechanism. The shaft-holding system is located inside the cover, the protective tube structure is located at the rear of the cover, the tensioning structure is located at the bottom of the cover, and the drive mechanism is mounted on the tensioning structure and connected to the shaft-holding system. The shaft-holding system in this portable and mobile pipe cleaning machine is suitable for various specifications of flexible shafts, offering high versatility. The protective tube structure prevents wastewater splashing and avoids unnecessary injury caused by flexible shaft entanglement. The two frame types are interchangeable.

[0006] Furthermore, the clamping system includes a clamping assembly and a clutch assembly, both of which are fitted onto a flexible shaft sleeve. A tensioning end cap is provided at the rear end of the flexible shaft sleeve. The clamping assembly cooperates with the clutch assembly. The clutch assembly includes a fixed seat, a clutch retainer, and a clutch top ring. The fixed seat is mounted on the housing, the clutch retainer is mounted on the fixed seat, and the clutch top ring is mounted on the clutch retainer, cooperating with the clamping assembly. The fixed seat is provided with an adjusting roller and a boss stop block. The clutch retainer is provided with a helical boss, one side of which contacts the adjusting roller, or the boss stop block contacts the other side of the helical boss. The clutch assembly controls the clamping assembly, which can easily clamp various sizes of flexible shafts. When the handle is turned, one side of the spiral boss contacts the adjusting roller, and the clutch seat moves spirally. The movement of the clutch seat allows the clutch top ring to contact the clamping assembly. When the handle is released, the clutch seat can contact the other side of the spiral boss through the set boss stop during the reset process, which plays a limiting role for the spiral boss.

[0007] Furthermore, a handle is provided on the clutch cassette. The clutch cassette can be easily controlled via the handle.

[0008] Furthermore, the clutch top ring is configured in a frustum shape. This facilitates contact between the clutch top ring and the clamping roller when the handle is actuated.

[0009] Furthermore, the spiral boss is arranged in a triangular structure. This allows the clutch seat to move spirally when the handle is turned.

[0010] Furthermore, the clamping assembly includes a pulley, a clamping block, a clamping shaft, a clamping lever, a clamping roller, and a clamping limiting seat. The clamping block is mounted on the pulley via the clamping limiting seat, and the clamping lever is mounted on the pulley via the clamping shaft. One end of the clamping lever engages with the clamping block, and the other end of the clamping lever is equipped with a clamping roller, which engages with the clutch top ring. Moving the handle causes the helical boss to contact the adjusting roller, simultaneously causing the clutch seat to move helically. This, in turn, causes the clutch top ring to engage with the clamping roller, resulting in the clamping lever swinging, which in turn clamps the flexible shaft via the clamping block.

[0011] Furthermore, there are multiple clamping levers, each equipped with a clamping pull rod, and adjacent clamping pull rods are connected by clamping springs. The clamping levers can be reset by the clamping springs after the handle is released.

[0012] Furthermore, the clamping block is provided with a clamping groove, and one end of the clamping lever is located within the clamping groove. This facilitates control of the clamping block's retraction or expansion.

[0013] Furthermore, the protective tube structure includes a protective tube body and a protective tube connector. The protective tube body is mounted on the protective tube connector. The protective tube connector includes a connector base and a connector cap. The connector base is connected to the connector cap. A locking sleeve is provided on the connector cap, and a locking bolt is provided on the locking sleeve. Limiting steps and anti-detachment protrusions are provided on the inner walls of both the connector base and the connector cap. The locking sleeve is fitted onto the protective tube pin, and the locking bolt abuts against the protective tube pin. The protective tube pin is located at the rear of the housing. By inserting two symmetrically arranged locking sleeves into the protective tube pin and then locking the locking sleeves and the protective tube pin with the locking bolt, the stability during locking can be improved, preventing the protective tube body from falling off when the flexible shaft rotates inside the protective tube body. The protective tube pin is located on the housing. During assembly, the locking sleeve is fitted onto the protective tube pin, and then the locking bolt is tightened so that the locking bolt abuts against the protective tube pin, thereby fixing the locking sleeve and the protective tube pin.

[0014] Furthermore, both sides of the connector base and the connector cover are provided with connecting plates, and the connecting plates on the connector base and the connector cover are connected by connecting bolts. The connecting plates facilitate the assembly of the connector base and the connector cover.

[0015] Furthermore, the connecting plate set on the connector cover is connected to the locking sleeve.

[0016] Furthermore, the limiting step contacts the end of the protective tube body. The limiting step serves to limit the movement of the protective tube body, preventing it from protruding from the protective tube joint.

[0017] Furthermore, the anti-detachment protrusion has a semi-circular cross-section. The anti-detachment protrusion contacts the outer wall of the protective tube body to prevent the protective tube body from detaching.

[0018] Furthermore, the main body of the protective tube is a corrugated pipe. The length of the protective tube can be determined according to actual needs. The main body of the protective tube can be bent freely with the flexible shaft. It can be disassembled as a whole without unblocking operations, simplifying the machine structure and facilitating storage.

[0019] Furthermore, the tensioning structure includes a mounting plate, a mounting base, a mounting shaft, an adjusting mechanism, and a base plate. The base plate is disposed at the bottom of the housing, the driving mechanism is disposed on the mounting plate, the mounting shaft is fixedly disposed on one side of the mounting plate, the mounting base is fixedly disposed on one side of the base plate, the mounting shaft is rotatably disposed on the mounting base, and the other side of the mounting plate is connected to the other side of the base plate via the adjusting mechanism. By adjusting the adjusting mechanism, the mounting plate swings along the mounting shaft on the base plate to adjust the position of the motor, thereby achieving synchronous belt tension adjustment.

[0020] Furthermore, an adjustment groove is provided on the other side of the mounting plate. The adjustment groove has an open structure. The adjustment mechanism includes an adjustment nut and an adjustment screw. The adjustment screw passes through the adjustment groove and is threadedly connected to the base plate. The adjustment nut is mounted on the adjustment screw and is located between the mounting plate and the base plate. The adjustment groove has an oblong structure, which avoids interference between the adjustment screw and the adjustment groove when the mounting plate swings along the mounting axis. After loosening the adjustment nut, the adjustment screw can be turned to adjust the position of the mounting plate. After adjustment, the adjustment nut is turned to lock the adjustment screw.

[0021] Furthermore, the mounting plate is located below the base plate.

[0022] Furthermore, a washer is provided on each of the upper and lower sides of the adjustment groove.

[0023] Furthermore, the frame is a horizontal frame, comprising a horizontal frame axle, horizontal support arms, a horizontal handlebar, a horizontal wheel, and a horizontal handlebar glove. The cover is mounted on the horizontal support arms, the horizontal wheel is mounted on the horizontal frame axle, the horizontal frame axle is connected to two horizontal support arms, and each of the two horizontal support arms is connected to a horizontal handlebar. A horizontal handlebar glove is mounted on the horizontal handlebar. The horizontal frame is low and suitable for outdoor work. The horizontal handlebar is detachable, allowing it to be removed during loading and transportation to reduce space occupation and allowing for easy reassembly during use. The horizontal handlebar glove enhances user comfort.

[0024] Furthermore, the frame is an upright frame, comprising an upright frame axle, upright support arms, an upright handlebar, an upright wheel, upright support lugs, an upright support crossbar, and an upright support reinforcing rib. The cover is mounted on the upright support arm, the upright wheel is mounted on the upright frame axle, and the upright frame axle is mounted on the upright support arm via the upright support lugs. Both upright support arms are connected to the upright handlebar, and the two upright support arms are connected via the upright support crossbar. The horizontal and vertical sections of the upright support arms are connected via the upright support reinforcing rib. Compared to a horizontal frame, the upright frame has increased overall height and decreased length, making its structure more suitable for climbing stairs. The upright handlebar is detachable, and the space below the motor can store a flexible shaft storage basket, making it easier to transport flexible shafts indoors. The two frame types are interchangeable.

[0025] Furthermore, the side of the frame is provided with a storage structure, which includes a bracket fixing plate, a J-pin, and a key ring. The bracket fixing plate is mounted on the frame via the J-pin, and the key ring is mounted on the J-pin. The key ring, made of flexible steel wire bent into shape, is installed on the J-pin on the side of the frame. Various blades can be threaded onto it, and the required blade can be removed as needed. The flexible key ring prevents the blade from falling off. The J-pin on the side of the frame can be used to wrap the power cord.

[0026] Furthermore, the housing includes a front housing and a rear housing, with a partition between the front housing and the rear housing. The clamping assembly is located in the cavity formed by the front housing and the partition, the clutch assembly is located in the cavity formed by the rear housing and the partition, the protective tube structure is located at the rear of the rear housing, and the tensioning structure is located at the bottom of the rear housing.

[0027] Furthermore, the drive mechanism includes a motor, and a drive wheel is provided on the motor shaft of the motor. The drive wheel and the pulley are driven by a synchronous belt.

[0028] Furthermore, another technical objective of the present invention is to provide a method for using a portable and mobile pipe cleaning machine.

[0029] The above-mentioned technical objective of the present invention is achieved through the following technical solution.

[0030] A method for using a portable and mobile pipe cleaning machine, characterized by the following: The flexible shaft passes through a clamping system and a protective pipe structure. A drive mechanism drives the clamping system to rotate, thus rotating the flexible shaft. Pressing down the handle causes the spiral boss to contact the adjusting roller. Under the rolling force of the adjusting roller, the clutch seat spirals forward, simultaneously pushing the clutch top ring forward as well. When the clutch top ring contacts the clamping roller, pressing down the handle further causes the clutch top ring to continue spiraling forward, causing the clamping roller to roll upwards along the conical surface of the clutch top ring. Simultaneously, the clamping spring is stretched, and the clamping lever expands in a "trumpet" shape under the thrust of the clutch top ring. At the same time, the clamping blocks converge towards the center under the force of the clamping lever, achieving the effect of clamping the flexible shaft. When the handle is released, the clamping spring's reaction force causes the clamping lever to automatically reset, slackening the flexible shaft.

[0031] Compared with the prior art, the present invention has the following advantages: Since the fixed seat of this shaft clamping system is stationary, when the handle is turned, the contact between the spiral boss and the adjusting roller allows the clutch seat to push the clutch top ring forward in a spiral manner. When the clutch top ring contacts the clamping roller, the clamping lever can swing along the clamping shaft, and at the same time, the clamping block clamps the flexible shaft. This shaft clamping system can be used to clamp flexible shafts of various specifications, has good versatility, large clamping force, is easy to use, and has stable rotation.

[0032] In this protective tube structure, the locking sleeve is fitted onto the protective tube pin, and the locking sleeve and the protective tube pin are fixed together by the locking bolt. This allows for quick assembly and disassembly of the locking sleeve and the protective tube pin. The two symmetrically arranged locking sleeves, connected to the protective tube pin by the locking bolt, improve stability and prevent the protective tube structure from falling off when the flexible shaft rotates. This quick-release protective tube structure also prevents wastewater from splashing during the rotation of the flexible shaft and prevents the flexible shaft from getting tangled and causing unnecessary damage.

[0033] This tensioning structure saves space by mounting the motor at the bottom of the mounting plate, ensuring stable and reliable installation. During tension adjustment, the mounting plate is adjusted to the appropriate position by turning the adjusting screw, and then the adjusting nut is turned to lock the adjusting screw. Since the motor is mounted on the mounting plate, the position of the motor can be adjusted, thereby enabling the tension adjustment of the synchronous belt.

[0034] The frame can be either a horizontal or vertical frame, and the two types are interchangeable. The horizontal frame is lower and more suitable for outdoor work, while the vertical frame has a higher overall height and a shorter length, making it more suitable for climbing stairs.

[0035] The storage structure uses a key ring formed by bending elastic steel wire, which is installed on a J-pin on the side of the frame. Various blades can be threaded on it, and the required blade can be taken out as needed. The elastic key ring prevents the blade from falling off, and the J-pin on the side of the frame can be used to wrap the power cord. Attached Figure Description

[0036] Figure 1 This is a cross-sectional structural diagram of a portable and mobile pipe cleaning machine (without the frame) according to an embodiment of the present invention.

[0037] Figure 2 This is a top view of the bearing system according to an embodiment of the present invention.

[0038] Figure 3 yes Figure 2 Schematic diagram of section II in the diagram.

[0039] Figure 4 This is a three-dimensional structural diagram of the bearing system according to an embodiment of the present invention.

[0040] Figure 5 yes Figure 4 A schematic diagram of the enlarged structure of Part II.

[0041] Figure 6 This is a front view schematic diagram of the protective tube structure according to an embodiment of the present invention.

[0042] Figure 7 yes Figure 6A schematic diagram of the III-III cross-sectional structure.

[0043] Figure 8 This is an exploded structural diagram of the protective tube structure according to an embodiment of the present invention.

[0044] Figure 9 This is a schematic diagram of the installation structure of the protective tube structure according to an embodiment of the present invention.

[0045] Figure 10 This is a three-dimensional structural diagram of the tensioning structure according to an embodiment of the present invention.

[0046] Figure 11 This is an exploded structural diagram of the tensioning structure according to an embodiment of the present invention.

[0047] Figure 12 This is a schematic diagram of the installation structure of the tensioning structure according to an embodiment of the present invention.

[0048] Figure 13 This is a three-dimensional structural diagram of the horizontal frame of Embodiment 1 of the present invention.

[0049] Figure 14 This is a three-dimensional structural diagram of the portable and mobile pipe cleaning machine according to Embodiment 1 of the present invention.

[0050] Figure 15 This is a three-dimensional structural diagram of the vertical frame of Embodiment 2 of the present invention.

[0051] Figure 16 This is a three-dimensional structural diagram of the portable and mobile pipe cleaning machine according to Embodiment 2 of the present invention.

[0052] In the diagram: A. Axle clamping system; B. Protective tube structure; C. Tensioning structure; D. Frame; E. Storage structure; F. Cover; G. Drive mechanism.

[0053] Clamping assembly A1, clutch assembly A2, flexible shaft sleeve A3, tensioning end cap A4

[0054] Pulley A11, Clamping Block A12, Clamping Shaft A13, Clamping Lever A14, Clamping Roller A15, Clamping Spring A16, Clamping Limit Seat A17, Clamping Groove A18, Clamping Rod A19

[0055] Fixed base A21, clutch seat A22, clutch top ring A23, handle A24, adjusting roller A25, spiral boss A26, boss stop block A27.

[0056] Protective tube body B1, protective tube connector B2, protective tube pin B3

[0057] Connector base B21, connector gland B22, connecting bolt B23, locking sleeve B24, locking bolt B25, limiting step B26, anti-detachment boss B27, connecting plate B28, wing plate B29.

[0058] Mounting plate C1, mounting base C2, mounting shaft C3, adjusting mechanism C4, base plate C5

[0059] Adjustment groove C11

[0060] Adjusting nut C41, adjusting screw C42, washer C43

[0061] Horizontal frame D1, Vertical frame D2,

[0062] Horizontal frame axle D11, horizontal bracket arm D12, horizontal handlebar D13, horizontal wheel D14, horizontal handlebar sleeve D15.

[0063] Vertical frame axle D21, vertical support arm D22, vertical handlebar D23, vertical wheel D24, vertical support axle lug D25, vertical support crossbar D26, vertical support reinforcing rib D27.

[0064] Bracket fixing plate E1, J-pin E2, key ring E3

[0065] Front cover F1, Rear cover F2,

[0066] Motor G1, drive wheel G2, synchronous belt G3. Detailed Implementation

[0067] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0068] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the use of terms such as "upper," "lower," "left," "right," "middle," and "one" in this specification is merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0069] Example 1 (e.g.) Figure 1-14 (As shown).

[0070] The portable and mobile pipe cleaning machine in this embodiment includes a shaft-holding system A, a protective pipe structure B, a tensioning structure C, a frame D, a cover F, and a drive mechanism G. The cover F is mounted on the frame D, the shaft-holding system A is mounted inside the cover F, the protective pipe structure B is mounted at the rear of the cover F, the tensioning structure C is mounted at the bottom of the cover F, and the drive mechanism G is mounted on the tensioning structure C and connected to the shaft-holding system A.

[0071] The bearing system A in this embodiment includes a clamping assembly A1 and a clutch assembly A2. The clamping assembly A1 and the clutch assembly A2 cooperate with each other. Both the clamping assembly A1 and the clutch assembly A2 are mounted on the flexible shaft sleeve A3. The rear end of the flexible shaft sleeve A3 is provided with a tensioning end cap A4.

[0072] In this embodiment, the clutch assembly A2 includes a fixed seat A21, a clutch retainer A22, and a clutch top ring A23. The clutch retainer A22 is disposed on the fixed seat A21, and the clutch top ring A23 is disposed on the clutch retainer A22. The clutch top ring A23 cooperates with the clamping assembly A1, and the clutch top ring A23 is configured in a frustum shape.

[0073] In this embodiment, the fixed seat A21 is set on the cover F. The fixed seat A21 is provided with an adjusting roller A25 and a boss block A27. The clutch seat A22 is provided with a handle A24 and a spiral boss A26. One side of the spiral boss A26 contacts the adjusting roller A25, and the boss block A27 contacts the other side of the spiral boss A26. The spiral boss A26 is arranged in a triangular structure. Bearings are provided between the fixed seat A21 and the flexible shaft sleeve A3, between the flexible shaft sleeve A3 and the cover F, and between the clutch top ring A23 and the clutch top ring A23.

[0074] The clamping assembly A1 in this embodiment includes a pulley A11, a clamping block A12, a clamping shaft A13, a clamping lever A14, a clamping roller A15, and a clamping limiting seat A17. The clamping block A12 is mounted on the pulley A11 via the clamping limiting seat A17. The clamping lever A14 is mounted on the pulley A11 via the clamping shaft A13. One end of the clamping lever A14 engages with the clamping block A12, and the other end of the clamping lever A14 is provided with the clamping roller A15. The clamping roller A15 engages with the clutch top ring A23.

[0075] In this embodiment, there are multiple clamping levers A14, each clamping lever A14 is provided with a clamping rod A19, and two adjacent clamping rods A19 are connected by a clamping spring A16. The clamping block A12 is provided with a clamping groove A18, and one end of the clamping lever A14 is located in the clamping groove A18.

[0076] During operation, pulley A11 is driven to rotate by drive mechanism G. By pressing down handle A24, the two spiral bosses A26 on clutch seat A22 come into contact with the corresponding two adjusting rollers A25 on fixed seat A21. Under the rolling force of the two adjusting rollers A25, the pulley advances spirally, simultaneously pushing clutch top ring A23 forward. When clutch top ring A23 abuts against the three clamping rollers A15 on clamping assembly A1, pressing handle A24 further down causes the clutch top ring to... As ring A23 continues to advance, the three clamping rollers A15 on the clamping assembly A1 roll further upward along the conical surface of the clutch top ring A23. At the same time, the three clamping springs A16 with hooks in the clamping assembly A1 are stretched, and the clamping lever A14 expands in a "trumpet shape" under the thrust of the clutch top ring A23. Meanwhile, the three clamping blocks A12 in the pulley A11 converge towards the center under the force of the clamping lever A14, thereby achieving the effect of clamping the flexible shaft.

[0077] The clutch seat A22 contains a one-way thrust ball bearing that, under the reaction force of the clamping lever A14, will be pressed against the clutch top ring A23. During the rotation of the clamping assembly A1, it will rotate together with the clutch. When the handle A24 is released, under the reaction force of the clamping spring A16 in the clamping assembly A1, the subsequent parts will automatically reset, and the flexible shaft will be in a relaxed state.

[0078] The protective tube structure B in this embodiment includes a protective tube body B1 and a protective tube connector B2. The protective tube body B1 is mounted on the protective tube connector B2, and the protective tube connector B2 is mounted on the protective tube pin B3. The protective tube pin B3 is located at the rear of the cover F.

[0079] In this embodiment, the protective tube connector B2 includes a connector base B21 and a connector cap B22. The connector base B21 is connected to the connector cap B22. The connector cap B22 is provided with a locking sleeve B24 and a locking bolt B25. The inner walls of both the connector base B21 and the connector cap B22 are provided with a limiting step B26 and an anti-detachment boss B27. The locking sleeve B24 is fitted onto the protective tube pin B3, and the locking bolt B25 abuts against the protective tube pin B3.

[0080] In this embodiment, both sides of the connector base B21 and the connector cover B22 are provided with connecting plates B28. The connecting plate B28 on the connector base B21 and the connecting plate B28 on the connector cover B22 are connected by connecting bolts B23. The connecting plate B28 on the connector cover B22 is connected to the locking sleeve B24.

[0081] In this embodiment, the limiting step B26 contacts the end of the protective tube body B1, the anti-detachment boss B27 has a semi-circular cross-section, and the protective tube body B1 is a corrugated pipe.

[0082] In use, the protective tube structure B can be first installed on the protective tube connector B2, and then the connector base B21 and connector cap B22 can be connected by connecting bolts B23, so that the end of the protective tube body B1 contacts the limiting step B26. The limiting step B26 provided on the connector base B21 and connector cap B22 can prevent the protective tube body B1 from passing through the connector base B21 and connector cap B22, thus playing a limiting role. At the same time, it allows the outer wall of the protective tube body B1 to contact the anti-detachment protrusion B27. The anti-detachment protrusions B27 on the connector base B21 and connector cap B22 prevent the protective tube body B1 from falling off. Finally, the two symmetrically arranged locking sleeves B24 are fitted onto the two protective tube pins B3 on the cover B4. Tighten the locking bolts B25 so that the locking bolts B25 abut against the protective tube pins B3 to fix the locking sleeves B24 and the protective tube pins B3. This also allows for quick assembly and disassembly of the locking sleeves B24 and the protective tube pins B3. The locking bolts B25 are wing bolts.

[0083] The tensioning structure C in this embodiment includes a mounting plate C1, a mounting base C2, a mounting shaft C3, an adjusting mechanism C4, and a base plate C5. The mounting shaft C3 is fixedly mounted on one side of the mounting plate C1, and the mounting base C2 is fixedly mounted on one side of the base plate C5. The mounting shaft C3 is rotatably mounted on the mounting base C2. The other side of the mounting plate C1 is connected to the other side of the base plate C5 through the adjusting mechanism C4. The mounting plate C1 is located below the base plate C5, and the base plate C5 is located at the bottom of the cover F. The driving mechanism G is mounted on the mounting plate C1. The driving mechanism G includes a motor G1, and a driving wheel G2 is mounted on the motor shaft of the motor G1. The driving wheel G2 is driven by the pulley A11 through the synchronous belt G3. The motor G1 is mounted on the mounting plate C1.

[0084] In this embodiment, an adjustment groove C11 is provided on the other side of the mounting plate C1. The adjustment groove C11 has an open structure. A washer C43 is provided on the upper and lower sides of the adjustment groove C11. The adjustment mechanism C4 includes an adjustment nut C41 and an adjustment screw C42. The adjustment screw C42 passes through the adjustment groove C11 and is threadedly connected to the base plate C5. The adjustment nut C41 is installed on the adjustment screw C42 and is located between the mounting plate C1 and the base plate C5.

[0085] The tensioning structure is easy to adjust. The tension of the synchronous belt can be adjusted by adjusting the opening angle between the mounting plate C1 and the base plate C5 by adjusting the screw C42. In other words, the motor G1 is fixed to the mounting plate C1 by washers and screws to form a whole. The mounting shaft C3 on the mounting plate C1 passes through the mounting seat C2, and the mounting seat C2 is fixed to the base plate C5 by screws to form a hinge structure.

[0086] During installation, the timing belt G3 is pre-fitted onto the pulley A11 on the bearing system A and the drive wheel G2 at the front end of the motor G1. Then, the mounting plate C1 is adjusted to a suitable position by turning the adjusting screw C42 to adjust the position of the motor G1. Finally, the adjusting screw C42 is tightened by adjusting the adjusting nut C41 and the washer C43 to adjust the tension of the timing belt G3.

[0087] In this embodiment, the frame D is a horizontal frame D1. The horizontal frame D1 includes a horizontal frame axle D11, a horizontal support arm D12, a horizontal handlebar D13, a horizontal wheel D14, and a horizontal handlebar sleeve D15. A cover F is mounted on the horizontal support arm D12, and the horizontal wheel D14 is mounted on the horizontal frame axle D11. The horizontal frame axle D11 is connected to two horizontal support arms D12, and each of the two horizontal support arms D12 is connected to a horizontal handlebar D13. A horizontal handlebar sleeve D15 is mounted on the horizontal handlebar D13. The horizontal frame D1 is low and suitable for outdoor work. The horizontal handlebar D13 is detachable, allowing it to be removed during loading and transportation to reduce space occupation and allowing for easy reassembly during use. The horizontal handlebar sleeve D15 on the horizontal handlebar D13 increases user comfort.

[0088] In this embodiment, the side of the frame D is provided with a storage structure E. The storage structure E includes a bracket fixing plate E1, a J-pin E2, and a key ring E3. The bracket fixing plate E1 is mounted on the frame D via the J-pin E2, and the key ring E3 is mounted on the J-pin E2. The key ring E3, which is formed by bending elastic steel wire, is mounted on the J-pin E2 on the side of the frame D. Various cutting heads can be threaded onto it, and the required cutting head can be removed as needed. The elastic key ring E3 prevents the cutting head from falling off. The power cord can be wrapped around the J-pin E2 on the side of the frame D.

[0089] In this embodiment, the housing F includes a front housing F1 and a rear housing F2. A partition is provided between the front housing F1 and the rear housing F2. The clamping assembly A1 is located in the cavity formed by the front housing F1 and the partition, the clutch assembly A2 is located in the cavity formed by the rear housing F2 and the partition, the protective tube structure B is located at the rear of the rear housing F2, and the tensioning structure C is located at the bottom of the rear housing F2.

[0090] The method of using the portable and mobile pipe cleaning machine in this embodiment is as follows: The flexible shaft passes through the clamping system A and the protective pipe structure B. The clamping system A is driven to rotate by the drive mechanism G, thereby rotating the flexible shaft. By pressing down the handle A24, the spiral boss A26 contacts the adjusting roller A25. Under the rolling force of the adjusting roller A25, the clutch seat A22 spirals forward, simultaneously pushing the clutch top ring A23 to spiral forward as well. When the clutch top ring A23 contacts the clamping roller A15, the handle A24 is pressed down further. The clutch top ring A23 continues to spiral forward, causing the clamping roller A15 to roll further upward along the conical surface of the clutch top ring A23. At the same time, the clamping spring A16 is stretched, and the clamping lever A14 expands in a "trumpet shape" under the thrust of the clutch top ring A23. Meanwhile, the clamping block A12 converges towards the center under the force of the clamping lever A14, thereby achieving the effect of clamping the flexible shaft. When the handle A24 is released, the clamping lever A14 automatically resets under the reaction of the clamping spring A16, leaving the flexible shaft in a relaxed state.

[0091] Example 2 (e.g.) Figure 1-12 (As shown in Figures 15-16).

[0092] The portable and mobile pipe cleaning machine in this embodiment includes a shaft-holding system A, a protective pipe structure B, a tensioning structure C, a frame D, a cover F, and a drive mechanism G. The cover F is mounted on the frame D, the shaft-holding system A is mounted inside the cover F, the protective pipe structure B is mounted at the rear of the cover F, the tensioning structure C is mounted at the bottom of the cover F, and the drive mechanism G is mounted on the tensioning structure C and connected to the shaft-holding system A.

[0093] The bearing system A in this embodiment includes a clamping assembly A1 and a clutch assembly A2. The clamping assembly A1 and the clutch assembly A2 cooperate with each other. Both the clamping assembly A1 and the clutch assembly A2 are mounted on the flexible shaft sleeve A3. The rear end of the flexible shaft sleeve A3 is provided with a tensioning end cap A4.

[0094] In this embodiment, the clutch assembly A2 includes a fixed seat A21, a clutch retainer A22, and a clutch top ring A23. The clutch retainer A22 is disposed on the fixed seat A21, and the clutch top ring A23 is disposed on the clutch retainer A22. The clutch top ring A23 cooperates with the clamping assembly A1, and the clutch top ring A23 is configured in a frustum shape.

[0095] In this embodiment, the fixed seat A21 is set on the cover F. The fixed seat A21 is provided with an adjusting roller A25 and a boss block A27. The clutch seat A22 is provided with a handle A24 and a spiral boss A26. One side of the spiral boss A26 contacts the adjusting roller A25, and the boss block A27 contacts the other side of the spiral boss A26. The spiral boss A26 is arranged in a triangular structure. Bearings are provided between the fixed seat A21 and the flexible shaft sleeve A3, between the flexible shaft sleeve A3 and the cover F, and between the clutch top ring A23 and the clutch top ring A23.

[0096] The clamping assembly A1 in this embodiment includes a pulley A11, a clamping block A12, a clamping shaft A13, a clamping lever A14, a clamping roller A15, and a clamping limiting seat A17. The clamping block A12 is mounted on the pulley A11 via the clamping limiting seat A17. The clamping lever A14 is mounted on the pulley A11 via the clamping shaft A13. One end of the clamping lever A14 engages with the clamping block A12, and the other end of the clamping lever A14 is provided with the clamping roller A15. The clamping roller A15 engages with the clutch top ring A23.

[0097] In this embodiment, there are multiple clamping levers A14, each clamping lever A14 is provided with a clamping rod A19, and two adjacent clamping rods A19 are connected by a clamping spring A16. The clamping block A12 is provided with a clamping groove A18, and one end of the clamping lever A14 is located in the clamping groove A18.

[0098] During operation, pulley A11 is driven to rotate by drive mechanism G. By pressing down handle A24, the two spiral bosses A26 on clutch seat A22 come into contact with the corresponding two adjusting rollers A25 on fixed seat A21. Under the rolling force of the two adjusting rollers A25, the pulley advances spirally, simultaneously pushing clutch top ring A23 forward. When clutch top ring A23 abuts against the three clamping rollers A15 on clamping assembly A1, pressing handle A24 further down causes the clutch top ring to... As ring A23 continues to advance, the three clamping rollers A15 on the clamping assembly A1 roll further upward along the conical surface of the clutch top ring A23. At the same time, the three clamping springs A16 with hooks in the clamping assembly A1 are stretched, and the clamping lever A14 expands in a "trumpet shape" under the thrust of the clutch top ring A23. Meanwhile, the three clamping blocks A12 in the pulley A11 converge towards the center under the force of the clamping lever A14, thereby achieving the effect of clamping the flexible shaft.

[0099] The clutch seat A22 contains a one-way thrust ball bearing that, under the reaction force of the clamping lever A14, will be pressed against the clutch top ring A23. During the rotation of the clamping assembly A1, it will rotate together with the clutch. When the handle A24 is released, under the reaction force of the clamping spring A16 in the clamping assembly A1, the subsequent parts will automatically reset, and the flexible shaft will be in a relaxed state.

[0100] The protective tube structure B in this embodiment includes a protective tube body B1 and a protective tube connector B2. The protective tube body B1 is mounted on the protective tube connector B2, and the protective tube connector B2 is mounted on the protective tube pin B3. The protective tube pin B3 is located at the rear of the cover F.

[0101] In this embodiment, the protective tube connector B2 includes a connector base B21 and a connector cap B22. The connector base B21 is connected to the connector cap B22. The connector cap B22 is provided with a locking sleeve B24 and a locking bolt B25. The inner walls of both the connector base B21 and the connector cap B22 are provided with a limiting step B26 and an anti-detachment boss B27. The locking sleeve B24 is fitted onto the protective tube pin B3, and the locking bolt B25 abuts against the protective tube pin B3.

[0102] In this embodiment, both sides of the connector base B21 and the connector cover B22 are provided with connecting plates B28. The connecting plate B28 on the connector base B21 and the connecting plate B28 on the connector cover B22 are connected by connecting bolts B23. The connecting plate B28 on the connector cover B22 is connected to the locking sleeve B24.

[0103] In this embodiment, the limiting step B26 contacts the end of the protective tube body B1, the anti-detachment boss B27 has a semi-circular cross-section, and the protective tube body B1 is a corrugated pipe.

[0104] In use, the protective tube structure B can be first installed on the protective tube connector B2, and then the connector base B21 and connector cap B22 can be connected by connecting bolts B23, so that the end of the protective tube body B1 contacts the limiting step B26. The limiting step B26 provided on the connector base B21 and connector cap B22 can prevent the protective tube body B1 from passing through the connector base B21 and connector cap B22, thus playing a limiting role. At the same time, it allows the outer wall of the protective tube body B1 to contact the anti-detachment protrusion B27. The anti-detachment protrusions B27 on the connector base B21 and connector cap B22 prevent the protective tube body B1 from falling off. Finally, the two symmetrically arranged locking sleeves B24 are fitted onto the two protective tube pins B3 on the cover B4. Tighten the locking bolts B25 so that the locking bolts B25 abut against the protective tube pins B3 to fix the locking sleeves B24 and the protective tube pins B3. This also allows for quick assembly and disassembly of the locking sleeves B24 and the protective tube pins B3. The locking bolts B25 are wing bolts.

[0105] The tensioning structure C in this embodiment includes a mounting plate C1, a mounting base C2, a mounting shaft C3, an adjusting mechanism C4, and a base plate C5. The mounting shaft C3 is fixedly mounted on one side of the mounting plate C1, and the mounting base C2 is fixedly mounted on one side of the base plate C5. The mounting shaft C3 is rotatably mounted on the mounting base C2. The other side of the mounting plate C1 is connected to the other side of the base plate C5 through the adjusting mechanism C4. The mounting plate C1 is located below the base plate C5, and the base plate C5 is located at the bottom of the cover F. The driving mechanism G is mounted on the mounting plate C1. The driving mechanism G includes a motor G1, and a driving wheel G2 is mounted on the motor shaft of the motor G1. The driving wheel G2 is driven by the pulley A11 through the synchronous belt G3. The motor G1 is mounted on the mounting plate C1.

[0106] In this embodiment, an adjustment groove C11 is provided on the other side of the mounting plate C1. The adjustment groove C11 has an open structure. A washer C43 is provided on the upper and lower sides of the adjustment groove C11. The adjustment mechanism C4 includes an adjustment nut C41 and an adjustment screw C42. The adjustment screw C42 passes through the adjustment groove C11 and is threadedly connected to the base plate C5. The adjustment nut C41 is installed on the adjustment screw C42 and is located between the mounting plate C1 and the base plate C5.

[0107] The tensioning structure is easy to adjust. The tension of the synchronous belt can be adjusted by adjusting the opening angle between the mounting plate C1 and the base plate C5 by adjusting the screw C42. In other words, the motor G1 is fixed to the mounting plate C1 by washers and screws to form a whole. The mounting shaft C3 on the mounting plate C1 passes through the mounting seat C2, and the mounting seat C2 is fixed to the base plate C5 by screws to form a hinge structure.

[0108] During installation, the timing belt G3 is pre-fitted onto the pulley A11 on the bearing system A and the drive wheel G2 at the front end of the motor G1. Then, the mounting plate C1 is adjusted to a suitable position by turning the adjusting screw C42 to adjust the position of the motor G1. Finally, the adjusting screw C42 is tightened by adjusting the adjusting nut C41 and the washer C43 to adjust the tension of the timing belt G3.

[0109] In this embodiment, the frame D is a vertical frame D2. The vertical frame D2 includes a vertical frame axle D21, a vertical support arm D22, a vertical handlebar D23, a vertical wheel D24, a vertical support lug D25, a vertical support crossbar D26, and a vertical support reinforcing rib D27. The cover F is mounted on the vertical support arm D22, and the vertical wheel D24 is mounted on the vertical frame axle D21. The vertical frame axle D21 is mounted on the vertical support arm D22 via the vertical support lug D25. Both vertical support arms D22 are connected to the vertical handlebar D23. The two vertical support arms D22 are connected via the vertical support crossbar D26. The horizontal and vertical sections of the vertical support arm D22 are connected via the vertical support reinforcing rib D27. The upright frame D2 has an increased overall height and decreased length compared to the horizontal frame D1, making it more suitable for climbing stairs. The upright handlebars D23 are detachable, and the space under the motor G1 can store a flexible shaft storage basket, making it easier to transport flexible shafts indoors. The two frames are interchangeable.

[0110] In this embodiment, the side of the frame D is provided with a storage structure E. The storage structure E includes a bracket fixing plate E1, a J-pin E2, and a key ring E3. The bracket fixing plate E1 is mounted on the frame D via the J-pin E2, and the key ring E3 is mounted on the J-pin E2. The key ring E3, which is formed by bending elastic steel wire, is mounted on the J-pin E2 on the side of the frame D. Various cutting heads can be threaded onto it, and the required cutting head can be removed as needed. The elastic key ring E3 prevents the cutting head from falling off. The power cord can be wrapped around the J-pin E2 on the side of the frame D.

[0111] In this embodiment, the housing F includes a front housing F1 and a rear housing F2. A partition is provided between the front housing F1 and the rear housing F2. The clamping assembly A1 is located in the cavity formed by the front housing F1 and the partition, the clutch assembly A2 is located in the cavity formed by the rear housing F2 and the partition, the protective tube structure B is located at the rear of the rear housing F2, and the tensioning structure C is located at the bottom of the rear housing F2.

[0112] The method of using the portable and mobile pipe cleaning machine in this embodiment is as follows: The flexible shaft passes through the clamping system A and the protective pipe structure B. The clamping system A is driven to rotate by the drive mechanism G, thereby rotating the flexible shaft. By pressing down the handle A24, the spiral boss A26 contacts the adjusting roller A25. Under the rolling force of the adjusting roller A25, the clutch seat A22 spirals forward, simultaneously pushing the clutch top ring A23 to spiral forward as well. When the clutch top ring A23 contacts the clamping roller A15, the handle A24 is pressed down further. The clutch top ring A23 continues to spiral forward, causing the clamping roller A15 to roll further upward along the conical surface of the clutch top ring A23. At the same time, the clamping spring A16 is stretched, and the clamping lever A14 expands in a "trumpet shape" under the thrust of the clutch top ring A23. Meanwhile, the clamping block A12 converges towards the center under the force of the clamping lever A14, thereby achieving the effect of clamping the flexible shaft. When the handle A24 is released, the clamping lever A14 automatically resets under the reaction of the clamping spring A16, leaving the flexible shaft in a relaxed state.

[0113] Furthermore, it should be noted that the specific embodiments described in this specification may differ in the shape and name of their components, etc. The above description is merely illustrative of the structure of the present invention. All equivalent or simple variations made based on the structure, features, and principles described in this patent concept are included within the protection scope of this patent. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to substitute them, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, all of which should fall within the protection scope of this invention.

Claims

1. A portable and mobile pipe cleaning machine, comprising a frame (D) and a cover (F), wherein the cover (F) is disposed on the frame (D), characterized in that: It also includes a bearing system (A), a protective tube structure (B), a tensioning structure (C), and a drive mechanism (G). The bearing system (A) is located inside the housing (F), the protective tube structure (B) is located at the rear of the housing (F), the tensioning structure (C) is located at the bottom of the housing (F), and the drive mechanism (G) is located on the tensioning structure (C) and connected to the bearing system (A). The frame (D) is a horizontal frame (D1) or a vertical frame (D2). The bearing system (A) includes a clamping assembly (A1) and a clutch assembly (A2), both of which are fitted onto a flexible shaft sleeve (A3), and the clamping assembly (A1) and the clutch assembly (A2) cooperate with each other. The clutch assembly (A2) includes a fixed seat (A21), a clutch retainer (A22), and a clutch top ring (A23). The fixed seat (A21) is mounted on the housing (F), the clutch retainer (A22) is mounted on the fixed seat (A21), and the clutch top ring (A23) is mounted on the clutch retainer (A22). The clutch top ring (A23) also engages with the clamping assembly (A1). The clamping assembly (A1) includes a pulley (A11), a clamping block (A12), a clamping shaft (A13), a clamping lever (A14), a clamping roller (A15), and a clamping limiting seat (A17). The clamping block (A12) is mounted on the pulley (A11) via the clamping limiting seat (A17). The clamping lever (A14) is mounted on the pulley (A11) via the clamping shaft (A13). One end of the clamping lever (A14) engages with the clamping block (A12), and the other end of the clamping lever (A14) is provided with the clamping roller (A15). The clamping roller (A15) engages with the clutch top ring (A23). The fixed base (A21) is provided with an adjusting roller (A25) and a boss stop (A27). The clutch seat (A22) is provided with a handle (A24) and a spiral boss (A26). When the handle (A24) is turned, one side of the spiral boss (A26) contacts the adjusting roller (A25). When the handle (A24) is released, the boss stop (A27) contacts the other side of the spiral boss (A26).

2. The portable and mobile pipe cleaning machine according to claim 1, characterized in that: The protective tube structure (B) includes a protective tube body (B1) and a protective tube connector (B2). The protective tube body (B1) is mounted on the protective tube connector (B2). The protective tube connector (B2) includes a connector base (B21) and a connector cap (B22). The connector base (B21) is connected to the connector cap (B22). The connector cap (B22) is provided with a locking sleeve (B24). The locking sleeve (B24) is provided with a locking bolt (B25). The inner walls of the connector base (B21) and the connector cap (B22) are provided with a limit step (B26) and an anti-detachment protrusion (B27). The locking sleeve (B24) is fitted onto the protective tube pin (B3). The locking bolt (B25) abuts against the protective tube pin (B3). The protective tube pin (B3) is located at the rear of the cover (F).

3. The portable and mobile pipe cleaning machine according to claim 1, characterized in that: The tensioning structure (C) includes a mounting plate (C1), a mounting base (C2), a mounting shaft (C3), an adjusting mechanism (C4), and a base plate (C5). The base plate (C5) is located at the bottom of the cover (F). The driving mechanism (G) is located on the mounting plate (C1). The mounting shaft (C3) is fixedly located on one side of the mounting plate (C1). The mounting base (C2) is fixedly located on one side of the base plate (C5). The mounting shaft (C3) is rotatably located on the mounting base (C2). The other side of the mounting plate (C1) is connected to the other side of the base plate (C5) through the adjusting mechanism (C4).

4. The portable and mobile pipe cleaning machine according to claim 3, characterized in that: An adjustment groove (C11) is provided on the other side of the mounting plate (C1). The adjustment groove (C11) is an open structure. The adjustment mechanism (C4) includes an adjustment nut (C41) and an adjustment screw (C42). The adjustment screw (C42) passes through the adjustment groove (C11) and is threadedly connected to the base plate (C5). The adjustment nut (C41) is installed on the adjustment screw (C42) and is located between the mounting plate (C1) and the base plate (C5).

5. The portable and mobile pipe cleaning machine according to claim 1, characterized in that: The horizontal frame (D1) includes a horizontal frame axle (D11), a horizontal support arm (D12), a horizontal handlebar (D13), a horizontal wheel (D14), and a horizontal handlebar sleeve (D15). The cover (F) is mounted on the horizontal support arm (D12), and the horizontal wheel (D14) is mounted on the horizontal frame axle (D11). The horizontal frame axle (D11) is connected to two horizontal support arms (D12), and each of the two horizontal support arms (D12) is connected to a horizontal handlebar (D13). The horizontal handlebar (D13) is equipped with a horizontal handlebar sleeve (D15).

6. The portable and mobile pipe cleaning machine according to claim 1, characterized in that: The vertical frame (D2) includes a vertical frame axle (D21), a vertical support arm (D22), a vertical handlebar (D23), a vertical wheel (D24), a vertical support lug (D25), a vertical support crossbar (D26), and a vertical support reinforcing rib (D27). The cover (F) is mounted on the vertical support arm (D22), and the vertical wheel (D24) is mounted on the vertical frame axle (D21). The vertical frame axle (D21) is mounted on the vertical support arm (D22) via the vertical support lug (D25). Both vertical support arms (D22) are connected to the vertical handlebar (D23). The two vertical support arms (D22) are connected via the vertical support crossbar (D26). The horizontal and vertical sections of the vertical support arm (D22) are connected via the vertical support reinforcing rib (D27).

7. The portable and mobile pipe cleaning machine according to claim 1, characterized in that: The side of the frame (D) is provided with a storage structure (E), which includes a bracket fixing plate (E1), a J-pin (E2) and a key ring (E3). The bracket fixing plate (E1) is mounted on the frame (D) via the J-pin (E2), and the key ring (E3) is mounted on the J-pin (E2).

8. The portable and mobile pipe cleaning machine according to claim 1, characterized in that: The housing (F) includes a front housing (F1) and a rear housing (F2). A partition is provided between the front housing (F1) and the rear housing (F2). The clamping assembly (A1) is located in the cavity formed by the front housing (F1) and the partition. The clutch assembly (A2) is located in the cavity formed by the rear housing (F2) and the partition. The protective tube structure (B) is located at the rear of the rear housing (F2). The tensioning structure (C) is located at the bottom of the rear housing (F2).

9. A method of using the portable and mobile pipe cleaning machine according to any one of claims 1-8, characterized in that: The method of use is as follows: The flexible shaft passes through the bearing system (A) and the protective tube structure (B). The bearing system (A) is driven to rotate by the drive mechanism (G) to achieve the rotation of the flexible shaft. By pressing down the handle (A24), the spiral boss (A26) contacts the adjusting roller (A25), and under the rolling force of the adjusting roller (A25), the clutch seat (A22) spirals forward, simultaneously pushing the clutch top ring (A23) spiral forward as well. When the clutch top ring (A23) abuts against the clamping roller (A15), the handle (A24) is pressed down further, causing the clutch top ring (A26) to... 23) Continue spiraling forward, causing the clamping roller (A15) to roll further upward along the conical surface of the clutch top ring (A23). At the same time, the clamping spring (A16) is stretched, and the clamping lever (A14) expands in a "trumpet shape" under the thrust of the clutch top ring (A23). Meanwhile, the clamping block (A12) converges towards the center under the force of the clamping lever (A14), thereby achieving the effect of clamping the flexible shaft. When the handle (A24) is released, the clamping lever (A14) automatically resets under the reaction of the clamping spring (A16), leaving the flexible shaft in a relaxed state.

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