Pipe cutter

Abstract

The utility model relates to a pipe cutter which comprises a first component, a second component, a screw and a locking piece, one of the second component and the first component is a shell, the other one of the second component and the first component is a movable frame, the shell comprises a connecting frame and a first support, and one of the movable frame and the first support is provided with a roller. A cutting space is formed between the roller and the blade; the screw rod is arranged on the first component in a penetrating manner and is connected with the second component; the locking piece is provided with a locking part and has a locking position and an unlocking position, when the locking piece is located at the locking position, the locking part is in threaded fit with the screw rod, and when the locking piece is located at the unlocking position, the locking part is separated from the threaded fit with the screw rod. The distance between the blade and the rolling wheel can be adjusted slowly or rapidly, so that the device is suitable for pipes with different pipe diameters, and the whole adjusting process is convenient.

Description

Technical Field

[0001] This application relates to the field of cutting technology, and in particular to a pipe cutter. Background Technology

[0002] Pipe cutters are used to cut copper pipes. Traditional pipe cutters include two fixed rollers and a movable auxiliary blade, which are used to position the pipe at three points.

[0003] Currently, cutting pipes of different diameters is achieved by moving an auxiliary blade, but the adjustment process is inconvenient. Furthermore, it may not be possible to reliably select the fast or slow adjustment of the distance between the roller and the blade to adapt to the cutting of pipes of different diameters. Utility Model Content

[0004] Therefore, it is necessary to provide a pipe cutter that can reliably achieve both slow and fast adjustment.

[0005] This application provides a pipe cutter, comprising a first component; a second component, one of which is a housing, and the other of which is a movable frame, the housing comprising a connecting frame and a first support connected at an angle to each other, the movable frame being arranged opposite to the first support and slidingly engaged with the connecting frame, one of the movable frame and the first support being equipped with a roller, and the other being equipped with a blade, forming a cutting space between the roller and the blade; a screw, the screw passing through the first component and connected to the second component; and a locking member disposed on the first component, having a locking portion, the locking member having a locked position and an unlocked position, wherein when the locking member is in the locked position, the locking portion is threadedly engaged with the screw, and when the locking member is in the unlocked position, the locking portion is disengaged from the threaded engagement with the screw.

[0006] In one embodiment, the locking member is located on the periphery of the screw, the locking part is located on the inner side of the locking member facing the screw, and the first member is provided with an actuating mechanism. The power output end of the actuating mechanism is connected to the locking member in a transmission manner to drive at least part of the locking member to move along a first direction toward the screw to the locking position, or to move away from the screw to the unlocking position. The first direction is at an angle to the axial direction of the screw.

[0007] In one embodiment, the locking member is arranged along the axial direction of the screw, and the first end of the locking member is rotatably connected to the first component via a connecting shaft. The axial direction of the connecting shaft forms an angle with both the first direction and the axial direction of the screw. The locking part is disposed on the inner surface of the second end of the locking member, and the power output end of the actuating mechanism is drively connected to the position of the locking member away from the first end. This design reduces the likelihood of jamming during quick adjustment and prevents insecure locking when the locking position is stopped.

[0008] In one embodiment, the actuating mechanism includes a pusher that abuts against the locking member and is arranged to move toward the locking member along the first direction, thereby pushing the locking member to the unlocked position; and an elastic member that acts on the side of the second end of the locking member away from the screw, and the elastic force of the elastic member causes the second end of the locking member to always have a tendency to move toward the locked position.

[0009] In one embodiment, the first component is a housing, the second component is a movable frame, the housing includes a second support arranged opposite to the first support, the movable frame is located between the first support and the second support, the second support has a through hole for the screw to pass through, the connecting shaft is mounted on the second support, the elastic element is located between the connecting shaft and the movable frame, and the movable frame moves toward the first support under the action of a thrust on the screw toward the first support.

[0010] In one embodiment, along the axial direction of the screw, the position where the pusher abuts against the locking member is located between the elastic member and the connecting shaft.

[0011] In one embodiment, the pusher includes two extensions arranged axially at intervals along the connecting shaft and a connecting portion connecting the two extensions. The screw is located within the space enclosed by the connecting portion and the two extensions. The locking member is arranged opposite to the connecting portion and between the two extensions. The locking member is provided with an abutting portion that abuts against at least one of the extensions.

[0012] In one embodiment, the abutment is disposed on the outer side wall of the locking member facing the extension and extends axially along the connecting shaft, and the extension has a slot for insertion of the abutment.

[0013] In one embodiment, the movable frame and the connecting frame are provided with sliding grooves and rails that are matched and slidably engaged. The grooves and rails extend along the axial direction of the screw, and one of the grooves and rails is provided on the movable frame, while the other groove and rail is provided on the connecting frame.

[0014] In one embodiment, one of the screw and the second component is provided with a stepped hole, and the other is provided with a connecting rod. The connecting rod extends along the axial direction of the screw, and one end of the connecting rod is provided with an enlarged end. The stepped hole includes a first hole portion for accommodating the end and a second hole portion for restricting the end from disengaging. The cross-sectional area of ​​the second hole portion is smaller than the cross-sectional area of ​​the first hole portion. The first hole portion and the second hole portion are connected, and at least a portion of the connecting rod is located in the second hole portion.

[0015] In one embodiment, the locking portion includes engaging teeth that mate with the external threads of the screw.

[0016] In one embodiment, the external thread is a helical thread or a trapezoidal thread with a trapezoidal cross-section.

[0017] In one embodiment, the first component is a housing, and the second component is a movable frame.

[0018] In one embodiment, the housing includes a second bracket arranged opposite to the first bracket, the movable frame being located between the first and second brackets, and the second bracket having a through hole for the screw to pass through.

[0019] In one embodiment, the second bracket has a cavity communicating with the perforation, and the locking member is located within the cavity.

[0020] In one embodiment, the first end of the screw is connected to the movable frame, and the second end of the screw is provided with a handle, which is located on the side of the second bracket away from the movable frame.

[0021] In one embodiment, the roller is disposed on the movable frame, and the blade is disposed on the first support.

[0022] Compared with the prior art, the pipe cutter provided in this application has the following advantages: when the locking member is in the locked position, the locking part is threadedly engaged with the screw, and the movable frame is slidably engaged with the connecting frame. When the screw is rotated, the first component can be reliably and slowly adjusted relative to the second component along the first direction. When the locking member is in the unlocked position, since the locking part and the screw are threadedly separated, the first component can be quickly adjusted relative to the second component along the first direction, that is, the distance between the blade and the roller can be quickly adjusted to adapt to pipes of different diameters. The entire adjustment process is convenient. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a perspective view of a pipe cutter according to an embodiment of this application;

[0025] Figure 2 for Figure 1 Another structural diagram;

[0026] Figure 3 for Figure 2 A sectional view;

[0027] Figure 4 for Figure 2 A cross-sectional view from another angle;

[0028] Figure 5 for Figure 2 Partial structural diagram;

[0029] Figure 6 for Figure 5 Partial structural diagram;

[0030] Figure 7 This is a schematic diagram of the mating structure of the screw, locking member, and elastic member according to an embodiment of this application;

[0031] Figure 8 This is a schematic diagram of the mating structure of the screw, locking member, and elastic member according to another embodiment of this application;

[0032] Figure 9 This is a schematic diagram of the structure of a locking component according to one embodiment.

[0033] Reference numerals: 1. Housing; 11. Connecting frame; 111. Slide rail; 12. First bracket; 13. Second bracket; 130. Perforation; 131. Cavity; 132. Clearance hole; 2. Movable frame; 21. Slide groove; 22. Stepped hole; 221. First hole; 222. Second hole; 3. Screw; 31. External thread; 32. Connecting rod; 321. End; 4. Locking element; 41. Locking part; 42. Abutting part; 5. Roller; 6. Blade; 7. Connecting shaft; 8. Actuating mechanism; 81. Pushing element; 811. Extension part; 8111. Slot; 812. Connecting part; 82. Elastic element; 9. Handle. Detailed Implementation

[0034] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0035] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," "side," "top," "bottom," and similar expressions used in this application's specification are merely for describing various exemplary structural parts and elements of this application. However, their use herein is for illustrative purposes only and is determined based on the exemplary orientations shown in the accompanying drawings, and does not represent the only possible implementation. Since the embodiments disclosed in this application can be arranged in different orientations, these terms indicating orientation are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] It should be noted that "axial arrangement" means that the overall arrangement direction is along the axial direction, including but not limited to axial extension, and may be at an angle to the axial direction.

[0039] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0040] like Figures 1-9 As shown, this application discloses a pipe cutter. The pipe cutter includes a first component, a second component, a screw 3, and a locking member 4. One of the second component and the first component is a housing 1, and the other of the second component and the first component is a movable frame 2.

[0041] like Figures 1-3 As shown, the aforementioned housing 1 includes a connecting frame 11 and a first support 12 connected to each other and at an angle. The movable frame 2 is arranged opposite to the first support 12 and is slidably engaged with the connecting frame 11. Specifically, the movable frame 2 and the connecting frame 11 are matched with a sliding groove 21 and a slide rail 111 that are slidably engaged. The sliding groove 21 and the slide rail 111 extend along the axial direction of the screw 3, and one of the sliding groove 21 and the slide rail 111 is provided on the movable frame 2, while the other sliding groove 21 and the slide rail 111 is provided on the connecting frame 11.

[0042] Schematic illustration: the slide groove is located on the connecting frame 11, and the slide rail is located on the movable frame 2; or, as Figure 2 As shown, the slide groove 21 is located on the movable frame 2, and the slide rail 111 is located on the connecting frame 11. In this embodiment, the connecting frame 11 has slide rails 111 on both outer side walls arranged opposite to each other along the first direction B, and the movable frame 2 has slide grooves 21 at the corresponding positions of the slide rails 111. The first direction B is at an angle to the axis of the screw 3, and the axis of the screw 3 is defined as the second direction A.

[0043] Furthermore, one of the movable frame 2 and the first support 12 is equipped with a roller 5, and the other with a blade 6, forming a cutting space for cutting the tube between the roller 5 and the blade 6. Illustratively, in other embodiments, the roller is mounted on the first support 12, and the blade is mounted on the movable frame 2. In this embodiment, as... Figures 1-3 As shown, the roller 5 is mounted on the movable frame 2, and the blade 6 is mounted on the first bracket 12.

[0044] The aforementioned screw 3 passes through the first component and is connected to the second component. There are several ways to connect the screw 3 to the second component, such as by snapping the screw 3 into the second component, by connecting it through a connector, or by using a fixed connection.

[0045] Alternatively, one of the screw 3 and the second component may be provided with a stepped hole 22, and the other may be provided with a connecting rod 32. The connecting rod 32 extends axially along the screw 3, and one end of the connecting rod 32 has an enlarged end portion 321. The stepped hole 22 includes a first hole portion 221 for accommodating the end portion 321 and a second hole portion 222 for restricting the end portion 321 from disengaging. The cross-sectional area of ​​the second hole portion 222 is smaller than that of the first hole portion 221. The first hole portion 221 and the second hole portion 222 are connected, and at least a portion of the connecting rod 32 is located within the second hole portion 222. In other embodiments, schematically, the connecting rod is located on the second component, and the stepped hole is located on the screw 3. In this embodiment, as... Figure 3 and Figure 4 As shown, the connecting rod 32 is located on the screw 3, and the stepped hole 22 is located on the second component.

[0046] It is understandable that the screw 3 and the second component are connected through the step hole 22 and the connecting rod 32.

[0047] like Figures 1-5 As shown, the locking member 4 is provided on the first member and has a locking part 41. The locking member 4 has a locked position and an unlocked position. When the locking member 4 is in the locked position, the locking part 41 is threadedly engaged with the screw 3. When the locking member 4 is in the unlocked position, the locking part 41 is disengaged from the threaded engagement with the screw 3. At this time, the first member can move back and forth relative to the screw 3 along the second direction A.

[0048] Understandably, when the locking member 4 is in the locked position, the locking part 41 is threadedly engaged with the screw 3, and the movable frame 2 is slidably engaged with the connecting frame 11. When the screw 3 is rotated, the first component can be reliably and slowly adjusted relative to the second component along the second direction A (i.e., the axial direction of the screw 3). When the locking member 4 is in the unlocked position, since the locking part 41 is threadedly disengaged from the screw 3, the first component can be quickly adjusted relative to the second component along the second direction A, that is, the distance between the blade 6 and the roller 5 can be quickly adjusted to adapt to pipes of different diameters. The entire adjustment process is convenient.

[0049] like Figure 7 and Figure 8 As shown, the locking part 41 includes meshing teeth that mate with the external thread 31 of the screw 3. The external thread 31 is a helical thread. See [reference needed]. Figure 8 As shown. Alternatively, the external thread is a trapezoidal thread with a trapezoidal cross-section, see [reference]. Figure 7 As shown.

[0050] In one embodiment, the locking member 4 is a jaw located on the periphery of the screw 3. The jaw includes two clamping plates, and the locking part 41 is located on the surface of the two clamping plates facing each other. The actuating mechanism 8 brings the two clamping plates of the jaw closer to each other, thereby locking the jaw in a locked position, or moves the two clamping plates of the jaw further apart, thereby unlocking the locking member 4.

[0051] In this embodiment, such as Figures 1-6 As shown, the locking element 4 is located on the periphery of the screw 3, and the locking part 41 is located on the inner side of the locking element 4 facing the screw 3. An actuating mechanism 8 is provided on the first component. The power output end of the actuating mechanism 8 is connected to the locking element 4 for transmission, so as to drive at least a portion of the locking element 4 to move along the first direction B towards the screw 3 to the locked position, or towards the direction away from the screw 3 to the unlocked position. Thus, the switching between the locked and unlocked positions of the locking element 4 is achieved through the actuating mechanism 8, making the entire process convenient to operate.

[0052] Furthermore, the aforementioned locking member 4 can move entirely along the second direction B, or it can move partially along the second direction B. In this embodiment, as... Figures 4-9 As shown, the locking member 4 is arranged along the axial direction of the screw 3, and the first end of the locking member 4 is rotatably connected to the first component via the connecting shaft 7. The locking part 41 is provided on the inner surface of the second end of the locking member 4, and the power output end of the actuating mechanism 8 is connected to the locking member 4 at a position away from the first end. The axial direction of the connecting shaft 7 forms an angle with the first direction B and the second direction A, respectively, and the axial direction of the connecting shaft 7 is defined as the third direction C.

[0053] It is understandable that the locking member 4 is rotated around the connecting shaft 7 by the action mechanism 8, thereby switching between the locked and unlocked positions of the locking member 4.

[0054] The connecting shaft 7 can be fixedly connected to the first component, and the first end of the locking member 4 is rotatably mounted on the connecting shaft 7. The connecting shaft 7 can also be fixedly connected to the first end of the locking member 4, and the connecting shaft 7 is rotatably connected to the first component.

[0055] In the above embodiments, the first component can be a movable frame, and the second component can be a housing. In the specific embodiments provided in this application, such as... Figures 1-5 As shown, the first component is the shell 1, and the second component is the movable frame 2. The following detailed explanation will use the example of the first component being the shell 1 and the second component being the movable frame 2.

[0056] Specifically, such as Figures 4-9As shown, the actuating mechanism 8 includes a pushing member 81 and an elastic member 82. The pushing member 81 abuts against the locking member 4 and is arranged to move along the first direction B toward the locking member 4, thereby pushing the locking member 4 to the unlocked position. The elastic member 82 acts on the side of the second end of the locking member 4 away from the screw 3, and the elastic force of the elastic member 82 makes the second end of the locking member 4 always tend to move toward the locked position. It can be understood that the connecting shaft 7 adopts an off-axis design and, in conjunction with the locking part 41 and the external thread 31, is less prone to jamming during quick adjustment, and is less prone to insecure locking when the locking position is stopped, resulting in better cutting neatness. The off-axis design also prevents the blade 6 and the screw 3 from shifting positions during cutting, ensuring cutting neatness. Furthermore, when a force is applied to the first component along the length of the screw 3 to bring the blade 6 and the roller 5 closer together, the locking part 41 can easily disengage from the external thread 31; conversely, the locking part 41 will become more tightly engaged with the external thread 31 and will not disengage from the external thread 31.

[0057] The housing 1 includes a second support 13 arranged opposite to the first support 12. The movable frame 2 is located between the first support 12 and the second support 13. The second support 13 has a through hole 130 for the screw 3 to pass through. The connecting shaft 7 is mounted on the second support 13. The elastic element 82 is located between the connecting shaft 7 and the movable frame 2. The movable frame 2 moves toward the first support 12 under the action of the screw 3 being pushed toward the first support 12.

[0058] It is understandable that the rotational position of the locking member 4, i.e., the position of the connecting shaft 7, is located on the side of the elastic member 82 away from the movable frame 2. When the screw 3 is pushed axially towards the first support 12 along the screw 3 axis, the second end of the locking member 4 will move away from the screw 3 due to the presence of the elastic member 82. Therefore, the screw 3 can drive the movable frame 2 to move towards the first support 12. That is, in the locked position, the movable frame 2 can slide freely towards the side closer to the first support 12, reducing the distance between it and the first support 12, i.e., reducing the gap between the blade 6 and the roller 5.

[0059] In this embodiment, along the axial direction of the screw 3, the position where the pushing member 81 abuts against the locking member 4 is located between the elastic member 82 and the connecting shaft 7.

[0060] The process by which the aforementioned mechanism 8 switches the locking and unlocking positions of the locking member 4 is as follows: When the pushing member 81 is subjected to a pressing force along the axial direction of the connecting shaft 7 towards the locking member 4, the pushing member 81 pushes the locking member 4 away from the screw 3, thereby disengaging the locking part 41 from the external thread 31. The first component can then slide freely along the axial direction of the screw 3, achieving rapid adjustment. When the pressing force disappears, the second end of the locking member 4 moves towards the screw 3 under the action of the elastic member 82, thereby engaging the locking part 41 with the external thread 31 of the screw 3.

[0061] The aforementioned elastic element 82 can be a leaf spring or a spring sheet.

[0062] Furthermore, such as Figure 5 and Figure 6 As shown, the pushing member 81 includes two extensions 811 arranged at relative intervals along the axial direction of the connecting shaft 7 and a connecting portion 812 connecting the two extensions 811. The screw 3 is located within the space enclosed by the connecting portion 812 and the two extensions 811. The connecting portion 812 is arranged opposite to the locking member 4 and is located between the two extensions 811. The locking member 4 is provided with an abutting portion 42 that abuts against at least one extension 811. Therefore, the position where the pushing member 81 abuts against the locking member 4 is the position of the abutting portion 42.

[0063] Each extension 811 corresponds to a contact part 42, and the two contact parts 42 can be a single piece or separate pieces. In this way, the pusher 81 can reliably push the locking member 4.

[0064] Furthermore, the abutment portion 42 is provided on the outer side wall of the locking member 4 facing the extension portion 811 and extends along the axial direction of the connecting shaft 7. The extension portion 811 has a slot 8111 for the abutment portion 42 to be inserted. In this way, the abutment portion 42 of the locking member 4 is prevented from disengaging from the pushing member 81.

[0065] Furthermore, such as Figures 3-7 As shown, the interior of the second bracket 13 has a cavity 131 that communicates with the perforation 130. The locking member 4 is located in the cavity 131. In this embodiment, the locking member 4, the elastic member 82 and at least part of the pushing member 81 are all located in the cavity 131.

[0066] To facilitate the operation of the pusher 81, the peripheral wall of the second bracket 13 is provided with a clearance hole 132 at the position corresponding to the pusher 81, and the clearance hole 132 is connected to the cavity 131.

[0067] In this embodiment, such as Figure 3 As shown, the first end of the screw 3 is connected to the movable frame 2, and the second end of the screw 3 is provided with a handle 9, which is located on the side of the second bracket 13 away from the movable frame 2. The presence of the handle 9 facilitates the operation of the screw 3.

[0068] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A pipe cutter, characterized in that, include: First component; The second component, one of the second component and the first component is a shell, and the other of the second component and the first component is a movable frame. The shell includes a connecting frame and a first support that are connected to each other and at an angle. The movable frame is arranged opposite to the first support and slides with the connecting frame. One of the movable frame and the first support is equipped with a roller, and the other is equipped with a blade. A cutting space is formed between the roller and the blade. A screw rod, which passes through the first component and is connected to the second component; A locking member is provided on the first component and has a locking part. The locking member has a locked position and an unlocked position. When the locking member is in the locked position, the locking part is threadedly engaged with the screw. When the locking member is in the unlocked position, the locking part is disengaged from the threaded engagement with the screw.

2. The pipe cutter according to claim 1, characterized in that, The locking member is located on the periphery of the screw, and the locking part is located on the inner side of the locking member facing the screw. The first component is provided with an action mechanism, and the power output end of the action mechanism is connected to the locking member for transmission, so as to drive at least part of the locking member to move along a first direction toward the screw to the locking position, or to move away from the screw to the unlocking position. The first direction is at an angle to the axial direction of the screw.

3. The pipe cutter according to claim 2, characterized in that, The locking member is arranged along the axial direction of the screw, and the first end of the locking member is rotatably connected to the first component through a connecting shaft. The axial direction of the connecting shaft is at an angle to the first direction and the axial direction of the screw, respectively. The locking part is disposed on the inner side of the second end of the locking member, and the power output end of the actuating mechanism is connected to the locking member at a position away from the first end.

4. The pipe cutter according to claim 3, characterized in that, The actuating mechanism includes: A pusher abuts against the locking member and is arranged to move along the first direction toward the locking member, thereby pushing the locking member to the unlocked position; An elastic element acts on the side of the second end of the locking member away from the screw, and the elastic force of the elastic element causes the second end of the locking member to always have a tendency to move towards the locking position.

5. The pipe cutter according to claim 4, characterized in that, The first component is a housing, and the second component is a movable frame. The housing includes a second support arranged opposite to the first support. The movable frame is located between the first support and the second support. The second support has a through hole for the screw to pass through. The connecting shaft is mounted on the second support. The elastic element is located between the connecting shaft and the movable frame. The movable frame moves toward the first support under the action of a thrust on the screw toward the first support.

6. The pipe cutter according to claim 5, characterized in that, Along the axial direction of the screw, the position where the pusher abuts against the locking member is located between the elastic member and the connecting shaft.

7. The pipe cutter according to any one of claims 4 to 6, characterized in that, The pusher includes two extensions arranged axially at intervals along the connecting shaft and a connecting portion connecting the two extensions. The screw is located within the space enclosed by the connecting portion and the two extensions. The locking member is arranged opposite to the connecting portion and between the two extensions. The locking member is provided with an abutting portion that abuts against at least one of the extensions.

8. The pipe cutter according to claim 7, characterized in that, The abutment portion is disposed on the outer side wall of the locking member facing the extension portion and extends axially along the connecting shaft, and the extension portion has a slot for the abutment portion to be inserted.

9. The pipe cutter according to claim 2, characterized in that, The movable frame and the connecting frame are provided with sliding grooves and rails that are matched and slidably engaged. The grooves and rails extend along the axial direction of the screw, and one of the grooves and rails is provided on the movable frame, while the other groove and rail is provided on the connecting frame.

10. The pipe cutter according to claim 1, characterized in that, One of the screw and the second component is provided with a stepped hole, and the other is provided with a connecting rod. The connecting rod extends along the axial direction of the screw, and one end of the connecting rod is provided with an end with an enlarged cross-sectional area. The stepped hole includes a first hole portion for accommodating the end and a second hole portion for restricting the end from disengaging. The cross-sectional area of ​​the second hole portion is smaller than the cross-sectional area of ​​the first hole portion. The first hole portion and the second hole portion are connected, and at least part of the connecting rod is located in the second hole portion.

11. The pipe cutter according to claim 1, characterized in that, The locking part includes meshing teeth that engage with the external thread of the screw.

12. The pipe cutter according to claim 11, characterized in that, The external thread is a helical thread or a trapezoidal thread with a trapezoidal cross-section.

13. The pipe cutter according to any one of claims 1-4 and 9-12, characterized in that, The first component is a shell, and the second component is a movable frame.

14. The pipe cutter according to claim 13, characterized in that, The housing includes a second bracket arranged opposite to the first bracket, the movable frame being located between the first and second brackets, and the second bracket having a through hole for the screw to pass through.

15. The pipe cutter according to claim 13, characterized in that, The rollers are mounted on the movable frame, and the blades are mounted on the first support.

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