Pipe cleaning machine

Abstract

This application discloses a pipe cleaning machine, comprising: a handle for gripping; a roller connected to the handle and rotatable relative to the handle; a cable disposed within the roller; a motor for driving the cable to rotate, the motor including a motor shaft extending along a first axis; a cable feeding assembly for feeding the cable; the roller including an exposed portion exposed to air, the ratio of the surface area of ​​the exposed portion to the total surface area of ​​the roller being greater than or equal to 40% and less than or equal to 100%.

Description

[0001] This application claims priority to the Chinese patent application No. 202110023959.7, filed on January 8, 2021, the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to a power tool, in particular to a pipe cleaning machine. BACKGROUND

[0003] The pipe cleaning machine can assist in cleaning and dredging pipes such as waterways. The conventional pipe cleaning machine is designed to be too large in size and too heavy in weight, which is inconvenient for users to carry and increases the fatigue of users when using the pipe cleaning machine. SUMMARY

[0004] To solve the problems in the related art, the present application aims to provide a pipe cleaning machine, which is compact and light in whole machine, and improves the comfort of holding the hand-held power tool.

[0005] To achieve the above main purpose, the present application provides a pipe cleaning machine, comprising: a handle for holding; a drum connected with the handle and capable of rotating relative to the handle; a cable arranged in the drum; a motor driving the cable to rotate, the motor comprising a motor shaft extending along a first axis; a wire feeding assembly for feeding the cable; the drum comprises an exposed part exposed to air, and the ratio of the surface area of the exposed part to the total surface area of the drum is greater than or equal to 40% and less than or equal to 100%.

[0006] Optionally, the drum comprises a front end close to the wire feeding assembly and a rear end close to the handle, and in the radial direction of the first axis, the projection of the motor and the projection of the drum at least partially overlap.

[0007] Optionally, the rear part of the drum generates a mounting cavity, and at least part of the motor is placed in the mounting cavity.

[0008] Optionally, the pipe cleaning machine further comprises a transmission mechanism connected with the motor and the cable.

[0009] The transmission mechanism is arranged in the mounting cavity.

[0010] Optionally, the width of the pipe cleaning machine is greater than or equal to 180mm and less than or equal to 250mm, and the length of the pipe cleaning machine is greater than or equal to 430mm and less than or equal to 550mm.

[0011] The application provides a pipeline cleaning machine, comprising: a handle for holding; a drum connected with the handle and capable of rotating relative to the handle; a cable arranged in the drum; a motor driving the cable to rotate, the motor comprising a motor shaft extending along a first axis; a cable feeding assembly for feeding the cable; the drum comprising a front end close to the cable feeding assembly, a rear end close to the handle, and a middle part between the front end and the rear end, the front end and at least part of the middle part of the drum being exposed to air.

[0012] In a radial direction of the first axis, at least a projection of the motor and a projection of the drum overlap.

[0013] The application provides a pipeline cleaning machine, comprising: a handle for holding; a drum connected with the handle and capable of rotating relative to the handle; a cable arranged in the drum; a motor driving the cable to rotate, the motor comprising a motor shaft extending along a first axis; a motor housing connected with the handle and surrounding the motor; a cable feeding assembly for supporting and feeding the cable; the drum generating a mounting cavity, at least part of the motor housing being located in the mounting cavity.

[0014] Optionally, the pipeline cleaning machine further comprises a support arranged in the mounting cavity and arranged in a circumferential direction of the motor housing.

[0015] Optionally, the support comprises a connecting shaft and a support bearing sleeved on the connecting shaft, the support bearing being capable of rotating around the connecting shaft, and the support bearing being in direct or indirect contact with an inner wall of the drum.

[0016] Optionally, the support comprises a first support arranged at the rear end of the drum and a second support arranged in the handle or the motor housing, the first support and the second support being capable of rotating relative to each other.

[0017] Optionally, the first support and the second support are annular convex ribs or annular grooves in contact.

[0018] Optionally, the pipeline cleaning device further comprises a support arranged below the drum, and a downward projection of a gravity center of the pipeline cleaning machine is located in an overlapping area of the support and a downward projection of the drum.

[0019] Optionally, the downward projection of the gravity center of the pipeline cleaning device is located in a middle rear part of the downward projection of the drum.

[0020] Optionally, the support is integrally formed with the drum. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a perspective schematic view of a pipeline cleaning machine of a first embodiment of the application;

[0022] Figure 2 is Figure 1 is a cross-sectional schematic view of the pipeline cleaning machine in

[0023] Figure 3 is Figure 1 is a perspective view of another angle of the pipe cleaning machine in

[0024] Figure 4 is a structural view of a support of the pipe cleaning machine of the present application;

[0025] Figure 5 is a perspective view of the pipe cleaning machine of the second embodiment of the present application;

[0026] Figure 6 is a sectional view of the pipe cleaning machine in Figure 5

[0027] Figure 7 is a top view of the third embodiment of the present application;

[0028] Figure 8 is a sectional view of the pipe cleaning machine in Figure 7 in the A-A plane. DETAILED DESCRIPTION

[0029] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] With reference to Figure 1 and Figure 2 , the present application provides a pipe cleaning machine 100, which comprises a handle 110, a roller 120, a cable 130 and a motor 140. The handle 110 is for a user to hold. The roller 120 is connected with the handle 110 and can rotate relative to the handle 110. The cable 130 is arranged in the roller 120. The motor 140 can drive the roller 120 and the cable 130 to rotate. The motor 140 comprises a motor shaft 141 which can rotate around a first axis 101. The motor shaft 141 is fixedly connected with the roller 120, so that the motor 140 drives the roller 120 to rotate. The cable 130 is arranged to be wound in the roller 120 and is supported by the roller 120. The cable 130 can rotate with the roller 120. The pipe cleaning machine 100 further comprises a cable feeding assembly 150 for feeding the cable 130. The cable feeding assembly 150 is arranged at a front end 121 of the roller 120. The cable 130 extends from the roller 120 into the cable feeding assembly 150 and can extend forward from the cable feeding assembly 150 and retract into the roller 120 from the cable feeding assembly 150.

[0031] ​The cable 130 is made of elastic material so that the cable 130 can be wound around the drum 120 and can be bent in the pipe to be cleaned. The cable 130 can be made of spring steel wire, and a drill bit is provided at the front of the cable 130 for cleaning the pipe. The rear end of the cable 130 is wound around the drum 120. When the feeding assembly 150 feeds the cable 130, the cable 130 wound around the drum 120 is relatively unwound and fed forward. When the pipe cleaner 100 is used, the user reverses the motor 140 to drive the cable 130 back to the drum 120, and the cable 130 is wound around the pipe again. Optionally, an accessory connecting device is provided at the front of the cable 130 for mounting other accessories such as a blade or a pincer.

[0032] The feeding assembly 150 includes the auxiliary handle 110 and a feeding channel 151 formed in the auxiliary handle 110. The feeding channel 151 axially supports the cable 130, and the cable 130 can be extended and retracted in the feeding channel 151 along the direction of the first axis 101. The cable 130 extends in the feeding channel 151 substantially along the first axis 101. The feeding assembly 150 further includes a fixed roller 152, a movable roller 153, and an operating member 154. The operating member 154 is connected to the movable roller 153 and can move the movable roller 153 away from or toward the first axis 101. The fixed roller 152 is provided with two rollers, and the relative positions of the two rollers in the auxiliary handle 110 are fixed. The operating member 154 can move the movable roller 153 to a first position and a second position. When the movable roller 153 is in the first position, the movable roller 153 is relatively far away from the first axis 101, and the movable roller 153 does not contact the cable 130 at this time. When the movable roller 153 is moved to the second position, the movable roller 153 is relatively close to the first axis 101, and the movable roller 153 contacts the cable 130 at this time. The movable roller 153 and the fixed roller 152 cooperate to clamp the cable 130. The movable roller 153 and the fixed roller 152 are inclined relative to the first axis 101. Since the cable 130 is helical, the rotating cable 130 rotates relative to the movable roller 153 and the fixed roller 152, so that the rollers can feed or retract the cable 130 from the feeding channel 151. Optionally, the operating member 154 can be a trigger provided on the auxiliary handle 110. When the user presses the trigger to move the movable roller 153 to the second position, the trigger is recessed into the auxiliary handle 110, so that the surface of the trigger is substantially aligned with the surface of the auxiliary handle 110 or the distance between the two surfaces is within 5 mm.

[0033] The drum 120 includes an exposed portion exposed to air, and the ratio of the surface area of the exposed portion to the total surface area of the drum 120 is greater than or equal to 40% and less than or equal to 100%. Optionally, the drum includes an exposed portion exposed to air, and the ratio of the surface area of the exposed portion to the total surface area of the drum is greater than or equal to 20% and less than or equal to 100%.

[0034] Referring to Figure 2 and Figure 3 The drum 120 includes a front end 121 near the wire feeding assembly 150, a rear end 123 near the handle 110, and a middle portion 122 between the front end 121 and the rear end 123. The drum 120 internally generates a storage cavity 125 for storing the coiled cable 130. The drum 120 further generates a mounting cavity 124, which is generated at the rear portion of the drum 120. In the radial direction of the first axis 101, the projection of the mounting cavity 124 and the projection of the storage cavity 125 overlap. Alternatively, in the radial direction of the first axis 101, the projection of the mounting cavity 124 is located within the projection of the storage cavity 125, and at least part of the motor 140 is placed in the mounting cavity 124. The mounting cavity 124 is formed at the middle rear portion of the drum 120, and the drum 120 has an inner wall forming the mounting cavity 124. Alternatively, the mounting cavity 124 is a revolution body with the first axis 101 as the axis of revolution. The mounting cavity 124 can be a cylinder or a circular truncated cone. The cable 130 is wound around the inner wall, so that at least part of the motor 140 is located in the space surrounded by the cable 130. Part of the motor 140 is located in front of the rear end 123 of the drum 120 in the direction of the first axis 101, so that the projection of the rear end 123 of the drum 120 in the radial direction of the first axis 101 overlaps the projection of the motor 140 in the direction.

[0035] The pipe cleaning machine 100 further includes a transmission mechanism 160 connected to the motor 140 and the cable 130. The transmission mechanism 160 can be a planetary gear set for speed reduction of the drum 120. The transmission mechanism 160 is connected to the motor shaft 141 and can be driven to rotate by the motor shaft 141. The output end of the transmission mechanism 160 is provided with an output shaft, which is fixedly connected to the drum 120, and the connection can be achieved by screws. When the motor 140 rotates, the drum 120 is driven to rotate at a reduced speed by the transmission mechanism 160, and the cable 130 is driven to rotate synchronously by the drum 120. The transmission mechanism 160 is arranged in the mounting cavity 124, further reducing the overall size of the pipe cleaning machine 100.

[0036] The drum 120 includes an exposed portion exposed to air, so that the ratio of the surface area of the exposed portion of the drum 120 to the total surface area of the drum 120 is greater than or equal to 40% and less than or equal to 100%, for example, the ratio of the surface area of the exposed portion of the drum 120 to the total surface area of the drum 120 is greater than or equal to 65% and less than or equal to 100%. Part of the outer side of the drum 120 is not provided with a cover, so that the overall size of the pipe cleaning machine 100 is smaller, the weight is lighter, and the pipe cleaning machine 100 is more convenient to work. Alternatively, at least part of the front end 121 and at least part of the middle portion 122 of the drum 120 are exposed to air, i.e. no cover is provided on the outer side of the front end 121 and at least part of the middle portion 122 of the drum 120, and only a protective cover is provided near the rear end 123 of the handle 110.

[0037] The pipe cleaning machine 100 further comprises a motor housing 142, which encloses and supports the motor 140 rotatable inside the motor housing 142. The motor housing 142 is fixedly connected with the handle 110, and optionally, the motor housing 142 is fixedly connected with the handle 110 by screws or is integrally molded with the handle 110. At least a part of the motor housing 142 is located in the mounting cavity 124, and the front part of the motor housing 142 is shaped to match the shape of the mounting cavity 124. The pipe cleaning machine 100 further comprises a support 170a arranged in the mounting cavity 124 and arranged circumferentially on the motor housing 142. The support 170a is capable of contacting the inner wall of the drum 120 and supporting the drum 120. The support 170a comprises a connecting shaft 173 and a support bearing 174 sleeved on the connecting shaft 173, the support bearing 174 is rotatable around the connecting shaft 173, and the support bearing 174 directly or indirectly contacts the inner wall of the drum 120. Through the support bearing 174, the drum 120 is rotatable relative to the motor housing 142 and is supported by the motor housing 142. The support 170a and the screw arranged on the output shaft cooperatively support the drum 120, so that the drum 120 is rotatable relative to the handle 110 and the motor housing 142, but is fixedly positioned relative to the handle 110 in the axial direction of the first axis 101. Optionally, four supports 170a are arranged uniformly circumferentially on the motor housing 142, so that the motor housing 142 stably supports the drum 120.

[0038] Referring to Figure 4 Optionally, the support 170a is arranged behind the drum 120. The support 170a comprises a first support 171 arranged at the rear end 123 of the drum 120 and a second support 172 arranged in the handle 110 or the motor housing 142, and the first support 171 and the second support 172 are rotatable relative to each other. The first support 171 and the second support 172 are annular protrusions or annular grooves in contact with each other, so that the first support 171 can be embedded in the second support 172, or the second support 172 is embedded in the first support 171, so that the first support 171 is rotatable relative to the second support 172. Optionally, the first support 171 is an annular groove, and the second support 172 is an annular protrusion, and the second support 172 is arranged to be embedded in the first support 171, so that the connection is simple, and the overall length of the pipe cleaning machine 100 can be shortened.

[0039] The pipe cleaning device further comprises a support arranged below the roller 120, which can support the whole pipe cleaning machine 100 so that the pipe cleaning machine 100 can be placed steadily on a plane. Due to the arrangement of the whole pipe cleaning machine 100, the center of gravity of the pipe cleaning machine 100 is reasonable, and the downward projection of the center of gravity of the pipe cleaning machine 100 is located in the overlapping area of the downward projection of the support and the roller 120, so that the whole pipe cleaning machine 100 can be stably placed on a plane by the support. Alternatively, the downward projection of the center of gravity of the pipe cleaning device is located in the middle rear part of the downward projection of the roller 120, thereby reducing the fatigue of the user when using the pipe cleaning machine 100. The side of the support or below the handle is provided with a power combination part, which can be connected with a power assembly or form a power line. When the power assembly is connected, the power assembly has a plane parallel to the bottom of the support, and the plane and the bottom of the support together form a plane for placing the whole machine.

[0040] Alternatively, referring to Figure 5 and Figure 6 , the operating member 154a is a ring-shaped member sleeved on the auxiliary handle 110, and the operating member 154a can rotate relative to the auxiliary handle 110. The operating member 154a is internally provided with a protruding structure, and when the operating member 154a is rotated to a certain position relative to the auxiliary handle 110, the protruding structure can push the movable roller 153 to move close to the first axis 101, so that the movable roller 153 moves to the second position. Alternatively, the auxiliary handle 110 is further provided with a locking member 190 and a locking pin 191, and the locking member 190 can drive the locking pin 191 to engage with and disengage from the roller 120. When the locking pin 191 engages with the roller 120, the roller 120 and the auxiliary handle 110 can rotate synchronously. When the pipe cleaning machine 100 is used, the movable roller 153 is moved to the first position, and the cable 130 will not be sent out, so that the length of the cable 130 extending out of the auxiliary handle 110 does not change. The roller 120 and the auxiliary handle 110 are made to rotate synchronously by the locking pin 191, which prevents the cable 130 from being excessively bent and twisted, so that the cable 130 cannot work normally. Alternatively, the pipe cleaning machine 100 comprises a sleeve sleeved on the outer side of the auxiliary handle, and the sleeve can rotate relative to the auxiliary handle. The sleeve is used for the user to hold, and at this time the auxiliary handle can rotate relative to the sleeve. Alternatively, the sleeve and the operating member 154a are the same ring-shaped member.

[0041] As shown in Figure 6 , the height of the pipe cleaning machine 100 is denoted as H, which is the vertical distance between the top end of the roller and the bottom end of the support or the power assembly. H is greater than or equal to 200 mm and less than or equal to 350 mm, and can be greater than or equal to 220 mm and less than or equal to 300 mm in particular. As shown in Figure 7As shown, the width of the pipe cleaning machine 100 is denoted as L1. Since the drum 120 occupies a large proportion of the width of the machine, and the drum 120 in this embodiment is directly exposed to the working environment, the width can also be considered as the diameter of the drum 120 in this embodiment. In this embodiment, L1 is greater than or equal to 180mm and less than or equal to 250mm, and can be greater than or equal to 190mm and less than or equal to 230mm in particular. The length of the pipe cleaning machine 100 is denoted as L2, which is the vertical distance from the distal end of the wire feeding assembly 150 to the distal end of the handle 110 or the power supply assembly (not including the cable), and L2 is greater than or equal to 430mm and less than or equal to 550mm, and can be greater than or equal to 440mm and less than or equal to 530mm in particular.

[0042] As shown, the width of the pipe cleaning machine 100 is denoted as L1. Since the drum 120 occupies a large proportion of the width of the machine, and the drum 120 in this embodiment is directly exposed to the working environment, the width can also be considered as the diameter of the drum 120 in this embodiment. In this embodiment, L1 is greater than or equal to 180mm and less than or equal to 250mm, and can be greater than or equal to 190mm and less than or equal to 230mm in particular. The length of the pipe cleaning machine 100 is denoted as L2, which is the vertical distance from the distal end of the wire feeding assembly 150 to the distal end of the handle 110 or the power supply assembly (not including the cable), and L2 is greater than or equal to 430mm and less than or equal to 550mm, and can be greater than or equal to 440mm and less than or equal to 530mm in particular. Figure 8 As shown, the width of the pipe cleaning machine 100 is denoted as L1. Since the drum 120 occupies a large proportion of the width of the machine, and the drum 120 in this embodiment is directly exposed to the working environment, the width can also be considered as the diameter of the drum 120 in this embodiment. In this embodiment, L1 is greater than or equal to 180mm and less than or equal to 250mm, and can be greater than or equal to 190mm and less than or equal to 230mm in particular. The length of the pipe cleaning machine 100 is denoted as L2, which is the vertical distance from the distal end of the wire feeding assembly 150 to the distal end of the handle 110 or the power supply assembly (not including the cable), and L2 is greater than or equal to 430mm and less than or equal to 550mm, and can be greater than or equal to 440mm and less than or equal to 530mm in particular.

Claims

1. A pipe cleaning machine, comprising: Handles for gripping; A roller, connected to the handle, and capable of rotating relative to the handle; The cable is placed inside the drum; An electric motor drives the cable to rotate, the electric motor including a motor shaft extending along a first axis; A cable feeding assembly for feeding the cable; The roller includes an exposed portion that is exposed to air, and the ratio of the surface area of ​​the exposed portion to the total surface area of ​​the roller is greater than or equal to 40% and less than or equal to 100%. It also includes a motor housing that surrounds and supports the motor, the motor rotating within the motor housing, the motor housing being fixedly connected to the handle, and at least a portion of the motor housing being located within the roller generating mounting cavity.

2. The pipe cleaning machine as described in claim 1, wherein, The roller includes a front end near the wire feeding assembly and a rear end near the handle, wherein the projection of the motor and the projection of the roller at least partially overlap in the radial direction of the first axis.

3. The pipe cleaning machine as described in claim 2, wherein, The rear of the roller forms a mounting cavity, into which at least a portion of the motor is placed.

4. The pipe cleaning machine as described in claim 3, further comprising: The transmission mechanism connects the motor and the cable; The transmission mechanism is located inside the mounting cavity.

5. The pipe cleaning machine as described in claim 3, wherein, The width of the pipe cleaning machine is greater than or equal to 180mm and less than or equal to 250mm, and the length of the pipe cleaning machine is greater than or equal to 430mm and less than or equal to 550mm.

6. A pipe cleaning machine, comprising: Handles for gripping; A roller, connected to the handle, and capable of rotating relative to the handle; The cable is placed inside the drum; An electric motor drives the cable to rotate, the electric motor including a motor shaft extending along a first axis; A cable feeding assembly for feeding the cable; The roller includes a front end near the wire feeding assembly, a rear end near the handle, and a middle portion located between the front end and the rear end, with the front end and at least a portion of the middle portion of the roller exposed to air; It also includes a motor housing that surrounds and supports the motor, the motor rotating within the motor housing, the motor housing being fixedly connected to the handle, and at least a portion of the motor housing being located within the roller generating mounting cavity.

7. The pipe cleaning machine as described in claim 6, wherein, In the radial direction of the first axis, at least the projection of the motor and the projection of the roller overlap.

8. A pipe cleaning machine, comprising: Handles for gripping; A roller, connected to the handle, and capable of rotating relative to the handle; The cable is placed inside the drum; An electric motor drives the cable to rotate, the electric motor including a motor shaft extending along a first axis; A motor housing, connected to the handle, and surrounding the motor; A cable feeding assembly for supporting and feeding the cable; The roller forms a mounting cavity, and at least a portion of the motor housing is located within the mounting cavity; The roller includes an exposed portion that is exposed to air.

9. The pipe cleaning machine as described in claim 8, further comprising: A support member is disposed within the mounting cavity and is positioned circumferentially on the motor housing.

10. The pipe cleaning machine as described in claim 9, wherein, The support includes a connecting shaft and a support bearing sleeved on the connecting shaft. The support bearing is rotatable around the connecting shaft, and the support bearing is in direct or indirect contact with the inner wall of the roller.

11. The pipe cleaning machine as described in claim 8, further comprising: The support includes a first support and a second support. The first support is disposed at the rear end of the roller, and the second support is disposed inside the handle or the motor housing. The first support and the second support can rotate relative to each other.

12. The pipe cleaning machine as described in claim 11, wherein, The first support member and the second support member are contacting annular ribs or annular grooves.

13. The pipe cleaning machine as described in claim 8, wherein, The pipe cleaning device also includes a support, located below the roller. The downward projection of the center of gravity of the pipe cleaning machine is located in the overlapping area of ​​the downward projection of the support and the roller.

14. The pipe cleaning machine as described in claim 8, wherein, The downward projection of the center of gravity of the pipe cleaning device is located in the middle and rear part of the downward projection of the roller.

15. The pipe cleaning machine as described in claim 8, wherein, The support component is integrally formed with the roller.

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