Pipe cutter construction

Abstract

A pipe cutter construction comprising a base unit (10), two roller units (20), a sliding unit (30), a spindle unit (40), and a control unit (50), characterized in that: - the base unit (10) has two base bodies (11); - the two base bodies (11) are connected to each other, wherein a first recess (111) is provided at one end of each base body (11), which has a first surface (1111), a second surface (1112), and a third surface (1113), wherein the first surface (1111) and the second surface (1112) are spaced apart from each other and are parallel to each other, and the third surface (1113) is arranged between the first surface (1111) and the second surface (1112), wherein the third surface (1113) is perpendicular to the first surface (1111) and to the second surface (1112), wherein the base body (11) has a first guide rail (112) which leads into the first recess (111),and the longitudinal direction of the first guide rail (112) coincides with the longitudinal direction of the first recess (111), wherein the first guide rail (112) is designed as an elongated groove element; - that a rotary guide element (113) is arranged at one end of the base body (11), which is located on one side of the first recess (111), wherein the two sides of the rotary guide element (113) are provided with two stop edges (1131) which extend coaxially to the rotary guide element (113) and are connected to the first recess (111); - that a second recess (114) is located at the other end of the base body (11), which is located opposite the first recess (111) and is spaced apart from it; - that each roller unit (20) is rotatably mounted in the second recess (114); - that the sliding unit (30) is mounted in the first recess (111). is and can move within itwherein the sliding unit (30) is linearly displaceable between the first surface (1111) and the second surface (1112) and the sliding unit (30) is arranged close to the first surface (1111) or the second surface (1112), wherein the sliding unit (30) has a sliding seat (31), a cutting wheel (32) and a cutting wheel axis (33);- that the sliding seat (31) is housed in the first recess (111) and moves linearly therein, wherein one end of the sliding seat (31) is provided with a fourth recess (311) which points in the direction of the second recess (114), wherein the fourth recess (311) is provided with a first pivot hole (3111) which opens into the fourth recess (311), and the sliding seat (31) has a fifth recess (312) which extends longitudinally through the sliding seat (31), wherein the fifth recess (312) is provided with a second axis (3121) which is perpendicular to and intersects the first axis (3112),and wherein the fifth recess (312) has a first arcuate surface (3122) and several second arcuate surfaces (3123), the second arcuate surfaces (3123) being arranged one after the other along the longitudinal direction of the fifth recess (312), the first arcuate surface (3122) being arranged between the two second arcuate surfaces (3123); that the other end of the sliding seat (31) is provided with a sixth recess (313), the fifth recess (312) being located between the sixth recess (313) and the fourth recess (311), the sixth recess (313) being neither circular nor rectangular, the sliding seat (31) having a projection (314) extending along the depth of the sixth recess (313) and running linearly along the third surface (3113), the sliding seat (31) being provided with an elongated hole (315). is, which leads into the sixth recess (313),and wherein two second guide rails (316) are arranged on the upper and lower sides of the sliding seat (31), which engage with the first guide rails (112) of the base body (11), wherein the second guide rails (316) and the sliding seat (31) extend in the same direction so that the sliding unit (30) can slide linearly on the base unit (10), and wherein the two second guide rails (316) are designed as elongated strips;- that the cutting wheel (32) is rotatably mounted in the fourth recess (311) and is designed as a round cutting tool, wherein the outer circumference of the cutting wheel (32) is provided with a cutting edge (321) for cutting a tube, and wherein the cutting wheel (32) is provided with a second pivot hole (322) which is aligned with the first pivot hole (3111);- that the cutting wheel axis (33) passes through the first pivot hole (3111) and the second pivot hole (322) runs,such that the cutting wheel (32) is rotatably mounted in the fourth recess (311); that the spindle unit (40) is rotatably mounted in the base unit (10) and the sliding unit (30) and comprises a rotating part (41) and a spindle (42); that the rotating part (41) is rotatably mounted on the outside of the base unit (10) and serves for rotation, wherein the rotating part (41) is provided with a first coupling section (411); that the spindle (42) is provided with a rotating section (421) which is rotatably mounted in the rotary guide element (113), wherein the two sides of the rotating section (421) bear against the stop edges (1131) so that the spindle (42) is held firmly in the base unit (10), and wherein one end of the spindle (42) is provided with a first threaded section (422) which is rotatably mounted in the fifth recess (312), and wherein the axis of the first thread section (422) is aligned with the second axis (3121),wherein the first threaded section (422) is either not in contact with the first arcuate surface (3122) and the second arcuate surfaces (3123) or is arranged in a loose fit with them, and wherein the other end of the spindle (42) is provided with a second coupling section (423) which is coupled to the first coupling section (411) of the rotating part (41), wherein the second coupling section (423) and the first coupling section (411) are identical in form and function and the rotating part (41) causes the spindle (42) to rotate;- that the rotating section (421) is limited by the stop edges (1131), whereby the spindle (42) is rotatably mounted in the base unit (10) and the sliding unit (30), wherein the rotating part (41) is in turn limited by the spindle (42) and is rotatably mounted on the outside of the base unit (10),and wherein the spindle unit (40) is thus rotatably mounted in the base unit (10) and the sliding unit (30);- that the control unit (50) is mounted together with the sliding unit (30) and the spindle unit (40), wherein the control unit (50) is housed in and can move within the sixth recess (313), with a part of the control unit (50) protruding from the sixth recess (313) to be actuated by the user, and wherein the control unit (50) can move the sliding unit (30) linearly in the first recess (111), and wherein the control unit (50) comprises a pressure element (51), a control part (52), an elastic element (53), and a third connecting part (54);- that the sliding unit (30) moves within the base unit (10), while the control unit (50) moves on the sliding unit (30),wherein the direction of movement of the control unit (50) is oriented perpendicular to the direction of movement of the sliding unit (30); that the pressure element (51) is housed in the sixth recess (313), wherein a part of the pressure element (51) projects out of the sixth recess (313), and wherein the pressure element (51) is provided with a seventh recess (511) which serves to receive the spindle (42), and wherein at one end of the pressure element (51) there is an eighth recess (512) which is open, and wherein the pressure element (51) has a third guide rail (513) which is arranged between the seventh recess (511) and the eighth recess (512) and is designed as opposing upper and lower grooves, and wherein the pressure element (51) is also provided with a fourth connecting part (514) which is designed as a through hole and extends vertically through the eighth recess (512) runs,and wherein the pressure element (51) has the form of a non-round block; that the control part (52) is mounted together with the pressure element (51) and is housed inside the eighth recess (512), wherein at one end of the control part (52) there is a second threaded section (521) which engages with the first threaded section (422), and wherein fourth guide rails (522) are attached to the upper and lower sides of the control part (52) which engage with the third guide rails (513) of the pressure element (51), and wherein the fourth guide rails (522) are designed as protruding ribs, wherein the control part (52) also has a fifth connecting part (523) which is aligned with the fourth connecting part (514) and is designed as a through hole, and wherein at the other end of the control part (52) there is a spring receptacle (524) which is separate from the second threaded section (521),and wherein the control part (52) has a non-round shape;- that the elastic element (53) is housed in the spring receptacle (524), wherein one end of the elastic element (53) rests against the spring receptacle (524), while the other end rests against the bottom of the sixth recess (313), and wherein the second threaded section (521) can be pressed against the first threaded section (422) by the spring force of the elastic element (53) and engages with it, and wherein the elastic element (53) is designed as a spring;- that the third connecting part (54) passes through the fourth connecting part (514) and the fifth connecting part (523), wherein one end of the third connecting part (54) projects into the elongated hole (315), and wherein the third connecting part (54) moves within the elongated hole (315),wherein the control unit (50) can be mounted on the sliding unit (30) and can be moved by a certain distance; - that the spindle unit (40) limits the control part (52), while the control part (52) limits the pressure element (51), whereby the control unit (50) is securely mounted on the sliding unit (30) and cannot fall out, and wherein the third connecting part (54) connects the pressure element (51) and the control part (52) together and is additionally limited in the area of ​​the elongated hole (315), whereby the control unit (50) is securely mounted on the sliding unit (30) and cannot fall out, and wherein the control unit (50) as a whole is secured by both the spindle unit (40) and the sliding unit (30) and remains firmly in its position; and- that the pressure element (51) and the control part (52) move within the sixth recess (313) by pressing the control unit (50), whereby the elastic element (53) is compressed,that the second threaded section (521) disengages from the first threaded section (422), which allows the control unit (50) to move, which in turn moves the sliding unit (30) to adjust the distance between the cutting wheel (32) and the roller unit (20), and wherein the elastic element (53) restores its spring force upon release, causing the second threaded section (521) to re-engage with the first threaded section (422) and thus be positioned there.

Description

The present invention relates to a pipe cutter design, in particular a design in which the sliding unit is displaced in a first recess. The base unit and the sliding unit serve to rotatably support a spindle unit, while the sliding unit additionally accommodates a control unit. The combination of base unit, sliding unit, spindle unit, and control unit results in a particularly stable structure. According to the prior art, conventional pipe cutter designs, as described in US patents US 6539634 B2 and US 11571755 B2, are known. Both patent applications are based on the principle of a rocker mechanism structure. As shown in Fig. 1 of patent US 6539634 B2, element 8 is a rocker. By pressing the rocker (element 8), the threaded part and the threaded spindle can be separated, allowing element 2 to be moved quickly. Similarly, Fig. 1 of patent US 11571755 B2 shows element 21. By pressing the rocker (element 21), the threaded part and the threaded spindle can be separated, allowing element 5 to be moved. US patent US 11571755 B2, which corresponds to Taiwanese patent number 108136696 and certificate number TW I835881B, is entitled "Pipe Cutting Machine". It describes a pipe cutting machine 1 comprising an adjusting element 5 mounted on a C-shaped working element 3 and a pressure element 4. German patent DE 2019799 A describes an improved, manually operated pipe cutter. The pipe cutter consists of a base body with a guide section and a support section against which the pipe to be cut is supported. A sliding cutting wheel holder carries a cutting wheel that cuts the pipe by pivoting around the pipe axis. The invention includes a recess for storing a spare cutting wheel, which is secured by a locking plate. A threaded spindle enables the precise movement of the cutting wheel holder. Document US 2021 / 0060670 A1 describes a patented pipe cutting device that offers improved functionality. The device consists of a handle, a movable support, a circular blade, a rotary knob, a threaded rod, and a spring. The support is connected to the handle and carries the circular blade, while the threaded rod is stabilized by a spring to ensure smooth movement. The rotary knob allows adjustment of the distance between the circular blade and the rollers to cut pipes of varying diameters. By repeatedly turning and moving the handle, the circular blade cuts the pipe incrementally. The design minimizes vibration and improves precision compared to conventional pipe cutters. Document US 2018 / 0021863 A1 describes a patented pipe cutting device that offers improved functionality. The device consists of a handle, a movable support, a circular blade, a rotary knob, a threaded rod, and a spring. The support is connected to the handle and carries the circular blade, while the threaded rod is stabilized by a spring to ensure smooth movement. The rotary knob allows adjustment of the distance between the circular blade and the rollers to cut pipes of varying diameters. By repeatedly turning and moving the handle, the circular blade cuts the pipe incrementally. The design minimizes vibration and improves precision compared to conventional pipe cutters. Disadvantages of the conventional pipe cutter design include the following: 1. As shown in the sectional view in Fig. 6 of US Patent 1,157,175, B2, the cutting element 10 is not located on the same axis as the main element 15. When the cutting element 10 is loaded, the force is transferred to the engagement element 21. The engagement element 21 and the main element 15 form a toothed assembly, with the teeth of the engagement element 21 being subjected to significant torques. This offset arrangement requires more installation space and is less stable under load. 2. To disengage the toothing between the tooth section 26 of the engagement element 21 and the receiving element 19, the cutting element 10 and the engagement element 21 can slide within the groove guide device 9. The engagement element 21 is disengaged by means of a lever mechanism, i.e.,A rocker mechanism is used to control the meshing between the tooth section 26 and the receiving element 19. The position of the axis u of the engagement element 21 is therefore crucial. Any deviations in the position of the axis u can impair the fit and correct meshing between the engagement element 21 and the receiving element 19, leading to an unstable connection. In view of the aforementioned shortcomings of conventional pipe cutter designs, the inventor, based on years of experience in manufacturing, production and design, has developed a new pipe cutter design that overcomes the known disadvantages. Problem to be solved: In conventional pipe cutter designs, the cutting element is not located on the same axis as the main shaft, resulting in an unnecessarily large amount of installation space due to the offset arrangement. The present invention provides a sliding unit that can be moved within the first recess. The base unit and the sliding unit serve to rotatably support the spindle unit, while the sliding unit also accommodates the control unit. This combination of base unit, sliding unit, spindle unit, and control unit results in a particularly stable and reliable structure. Technical solution for problem solving: A pipe cutter assembly comprising a base unit, two roller units, a sliding unit, a spindle unit, and a control unit. The base unit includes two base bodies, each equipped with a first recess, a rotary guide element, two stop edges, and a second recess. The sliding unit consists of a sliding seat and a cutting wheel. The sliding seat is provided with a fourth recess, a rotary guide element, a first axis, a fifth recess, a second axis, a sixth recess, and a projection. The cutting wheel is equipped with a cutting edge. The spindle unit comprises a rotating part and a spindle, the rotating part being equipped with a first coupling section, and the spindle being provided with a rotating section and a first threaded section.The control unit comprises a pressure element, a control part and an elastic element, wherein the control part is connected to the pressure element and is provided with a second threaded section which engages with the first threaded section. In summary, the following advantages, for example, can be achieved with the pipe cutter design according to the invention: Compared to the prior art, the pipe cutter design according to the invention has a sliding unit that moves in the first recess. The base unit and the sliding unit serve to rotatably support the spindle unit, while the sliding unit also houses the control unit. The combination of base unit, sliding unit, spindle unit, and control unit results in a particularly stable structure. The control unit controls the engagement and disengagement of the second threaded section with the first threaded section by means of linear movement. With the control unit positioned in the sixth recess, the spindle unit only needs to be rotated slightly for the second threaded section to engage with the first threaded section, resulting in more precise control of the linear engagement. The invention and its embodiments are explained in more detail below with reference to the drawings. The drawings show: Fig. 1 a perspective exploded view of a pipe cutter construction according to the invention; Fig. 2 a perspective exploded view of the base unit and the roller units of the pipe cutter construction according to the invention; Fig. 3 a perspective exploded view of the roller units of the pipe cutter construction according to the invention; Fig. 4 a perspective exploded view of the sliding unit of the pipe cutter construction according to the invention; Fig. 5 a perspective exploded view of the sliding seat of the pipe cutter construction according to the invention; Fig. 6 a perspective exploded view of the sliding seat from another angle of the pipe cutter construction according to the invention; Fig. 7 a perspective exploded view of the spindle unit of the pipe cutter construction according to the invention; Fig.Fig. 8 is a perspective assembly drawing of the control unit of the pipe cutter construction according to the invention; Fig. 9 is a perspective view of the control element from another angle of the pipe cutter construction according to the invention; Fig. 10 is a perspective assembly drawing of the partial structure of the pipe cutter construction according to the invention; Fig. 11 is a perspective assembly drawing of the pipe cutter construction according to the invention; Fig. 12 is a side view of the pipe cutter construction according to the invention; Fig. 13 is a section along line AA in Fig. 12; Fig. 14 is a section view along line AA in Fig. 12 in a first operating position of the pipe cutter construction according to the invention; Fig. 15 is a section view along line AA in Fig. 12 in a second operating position of the pipe cutter construction according to the invention; and Fig. 16 is a section view along line AA in Fig.12 in a third operating position of the pipe cutter construction according to the invention. The present invention relates to a pipe cutter construction comprising a base unit 10, two roller units 20, a sliding unit 30, a spindle unit 40 and a control unit 50. The base unit 10 has two base bodies 11, a trimming knife 12 and a first connecting element 13. The two base bodies 11 are arranged opposite each other and are symmetrically designed. Each of the two base bodies 11 is provided at one end with a first recess 111. The first recess 111 comprises a first surface 1111, a second surface 1112, and a third surface 1113. The first surface 1111 and the second surface 1112 are arranged parallel to each other and separated by a gap. The third surface 1113 is located between the first surface 1111 and the second surface 1112 and is perpendicular to them. The base body 11 is provided with a first guide rail 112, which extends into the first recess 111. The first guide rail 112 runs longitudinally along the first recess 111 and is designed as a long groove profile. One end of the base body 11 is equipped with a rotary guide element 113, which is located on one side of the first recess 111. The two rotary guide elements 113 are arranged opposite each other and together form a round opening. The rotary guide element 113 has the shape of a semicircular indentation. Two stop edges 1131 are attached to the two sides of the rotary guide element 113 and are aligned coaxially with the rotary guide element 113. The rotary guide element 113 and the two stop edges 1131 are designed to form a round opening together. The stop edges 1131 are also semicircular and together form a round opening whose diameter is smaller than that of the rotary guide element 113. The rotary guide element 113, the two stop edges 1131, and the first recess 111 are structurally matched. The other end of the base body 11 is provided with a second recess 114, which is opposite the first recess 111 and spaced apart from it. The base body 11 is equipped with a first connecting element 115. On one base body 11, the first connecting element 115 is designed as a through hole, while on the other base body 11 it is designed as an internally threaded hole. Each base body 11 is equipped with several second connecting elements 116. On one base body 11, the second connecting elements 116 are designed as circular recesses, and on the other base body 11 as circular projections. These second connecting elements 116 of the two base bodies 11 are designed so that they can be fitted together precisely. The base body 11 is also provided with a third recess 117, which is designed as a long slotted profile. The trimming knife 12 is mounted within the third recess 117 and can move along it. The first connecting element 13 is designed as an external thread. The first connecting element 13 is guided through the two first connecting parts 115 and thus connects the two base bodies 11 to each other. The first connecting element 13 is a screw. The two roller units 20 are pivotably arranged in the second recess 114. Each roller unit 20 has a roller axle 21, three rollers 22 and two spacers 23. The roller axle 21 is rotatably mounted in the second recess 114 and has the shape of a round bar. The three rollers 22 and the two spacers 23 are arranged alternately. The three rollers 22 and the two spacers 23 are rotatably attached to the roller axle 21, with the rollers 22 positioned at the outer ends. The sliding unit 30 is mounted in the first recess 111 and can move within it. The sliding unit 30 moves between the first surface 1111 and the second surface 1112, approaching either the first surface 1111 or the second surface 1112. The sliding unit 30 comprises a sliding block 31, a cutting wheel 32, and a cutting wheel axle 33. The sliding block 31 is housed in the first recess 111 and can move linearly within it. At one end of the sliding block 31 is a fourth recess 311, which faces the second recess 114. A first pivot hole 3111, designed as a round through-hole, is integrated into the fifth recess 312. The first axis 3112 runs through the first pivot hole 3111. The sliding block 31 also has a fifth recess 312, which extends longitudinally through the sliding block 31. A second axis 3121 runs through the fifth recess 312, perpendicular to the first axis 3112 and intersecting it at a point. The fifth recess 312 has a first arcuate surface 3122 and several second arcuate surfaces 3123, which are arranged in a straight line. The first arc surface 3122 is located between the two second arc surfaces 3123.The fifth recess 312 has a first arcuate surface 3122 and several second arcuate surfaces 3123, which are positioned in a row along the longitudinal direction of the fifth recess 312. The first arcuate surface 3122 is located between the two second arcuate surfaces 3123. The other end of the sliding block 31 is provided with a sixth recess 313. The fifth recess 312 is located between the sixth recess 313 and the fourth recess 311. The sixth recess 313 is neither circular nor rectangular. The sliding block 31 has a projection 314 that extends to the depth of the bottom of the sixth recess 313. This projection 314 moves linearly along the third surface 1113. The sliding block 31 is also equipped with an elongated hole 315 that opens into the sixth recess 313. Two secondary guide rails 316 are located on the upper and lower side edges of the sliding block 31 and are slidably connected to the two primary guide rails 112. The second guide rails 316 run in the same direction as the sliding block 31 and enable the sliding unit 30 to move linearly along the base unit 10. The second guide rails 316 are designed as long projections.The sliding block 31 is also provided with several through-holes 317, which are arranged at regular intervals from one another. These through-holes 317 are aligned with the second arc surfaces 3123 and there are three of them. The cutting wheel 32 is rotatably mounted in the fourth recess 311. The cutting wheel 32 is designed in the form of a round blade, with its outer edge provided by a cutting edge 321 for cutting a pipe body. The cutting wheel 32 is also provided with a second pivot hole 322, which is aligned precisely opposite the first pivot hole 3111. The cutting wheel axle 33 is guided through the first pivot hole 3111 and the second pivot hole 322, whereby the cutting wheel 32 is rotatably mounted in the fourth recess 311. The cutting wheel axle 33 is designed as an elongated rod or as a threaded rod. The spindle unit 40 is rotatably mounted in the base unit 10 and the sliding unit 30. The spindle unit 40 comprises a turned part 41, a spindle 42, a coupling piece 43, a washer 44, a second connecting element 45, and a cover 46. The rotating part 41 is rotatably arranged outside the base unit 10. The rotating part 41 is designed so that it can be rotated by the user. It is provided with a first coupling section 411, which is designed as a non-circular recess. The spindle 42 is equipped with a rotary section 421, which is rotatably connected to the rotary guide element 113. The two sides of the rotary section 421 rest against the stop edges 1131, thus holding the spindle 42 firmly in the base unit 11 and preventing it from coming loose. One end of the spindle 42 is provided with a first threaded section 422, which is rotatably mounted in the fifth recess 312. The axis of the first threaded section 422 is aligned with the second axis 3121. The first threaded section 422 either does not contact the first arcuate surface 3122 and the second arcuate surfaces 3123, or it is arranged in a loose fit with them. The other end of the spindle 42 is provided with a second coupling section 423, which engages with the first coupling section 411 of the turned part 41 and corresponds to its shape. By rotating the turning part 41, the spindle 42 is set into rotation.Inside the second coupling section 423 there is a third connecting part 424, which is designed as an internal thread. The coupling piece 43 is arranged between the rotating part 41 and the base unit 10 to reduce friction between the rotating part 41 and the base unit 10. The coupling piece 43 is made of a flexible material that exhibits low frictional losses. The washer 44 is arranged inside the rotating part 41. The second connecting element 45 is designed as an externally threaded rod and is guided through the washer 44 in order to then be screwed to the third connecting part 424. The cover 46 is firmly attached to the open end of the rotating part 41 in order to close its opening. The turning section 421 is limited by the stop edges 1131, whereby the spindle 42 is rotatably mounted in the base unit 10 and the sliding unit 30. The turned part 41 is limited by the spindle 42 and is rotatably mounted on the outside of the base unit 10. Thus, the spindle unit 40 is rotatably mounted in the base unit 10 and the sliding unit 30. The control unit 50 is assembled together with the sliding unit 30 and the spindle unit 40. The control unit 50 is housed in the sixth recess 313 and can move within it. A portion of the control unit 50 protrudes from the sixth recess 313, allowing the user to actuate it. The control unit 50 can move the sliding unit 30 linearly within the first recess 111. The control unit 50 comprises a pressure element 51, a control element 52, an elastic element 53, and a third connecting element 54. The sliding unit 30 moves within the base unit 10, while the control unit 50 moves on the sliding unit 30. The direction of movement of the control unit 50 is perpendicular to the direction of movement of the sliding unit 30. The pressure element 51 is housed in the sixth recess 313, with a portion of the pressure element 51 protruding from the sixth recess 313. The pressure element 51 is provided with a seventh recess 511, which serves to receive the spindle 42. One end of the pressure element 51 is provided with an eighth recess 512, which is designed as an open groove. A third guide rail 513, formed by opposing upper and lower grooves, is arranged between the seventh recess 511 and the eighth recess 512. The pressure element 51 also has a fourth connecting part 514, which is designed as a through hole and extends vertically through the eighth recess 512. The pressure element 51 has a non-circular block shape. The control part 52 is mounted together with the pressure element 51 and is located in the eighth recess 512. A second threaded section 521 is attached to one end of the control part 52, which engages with the first threaded section 422. Fourth guide rails 522 are located on the upper and lower sides of the control part 52, engaging in the opposite grooves of the third guide rail 513 of the pressure element 51. The fourth guide rails 522 are designed as protruding ribs. The control part 52 has a fifth connecting part 523, which is aligned with the fourth connecting part 514 and is designed as a through hole. A spring receptacle 524 is located at the other end of the control part 52, which is not connected to the second threaded section 521. The control part 52 has a non-circular shape. The elastic element 53 is housed in the spring receptacle 524. One end of the elastic element 53 rests against the spring receptacle 524, while the other end rests against the bottom of the sixth recess 313. The second threaded section 521 is pressed against the first threaded section 422 by the spring force of the elastic element 53, so that both sections engage with each other. The elastic element 53 is designed as a spring. The third connecting element 54 is guided through the fourth connecting element 514 and the fifth connecting element 523. One end of the third connecting element 54 projects into the elongated hole 315. The third connecting element 54 can move within the elongated hole 315, allowing the control unit 50 to be mounted on the sliding unit 30 and to move over a certain distance. The spindle unit 40 limits the control element 52, which in turn limits the pressure element 51, ensuring that the control unit 50 is securely mounted on the sliding unit 30 and cannot detach. The third connecting element 54 connects the pressure element 51 to the control unit 52 and is guided through the elongated hole 315, which further secures it in position. This ensures that the control unit 50 is securely mounted on the sliding unit 30 and cannot detach. The control unit 50 is thus fixed by the spindle unit 40 and the sliding unit 30 and has two locking mechanisms that prevent it from coming loose. When the control unit 50 is pressed, the pressure element 51 and the control part 52 move within the sixth recess 313, compressing the elastic element 53. This separates the second threaded section 521 and the first threaded section 422. In this state, the control unit 50, together with the sliding unit 30, can be moved to adjust the distance between the cutting wheel 32 and the roller unit 20. When the control unit 50 is released, the elastic element 53, through its restoring force, re-establishes the connection between the second threaded section 521 and the first threaded section 422, thus fixing the position. Referring to Figures 11, 12 to 13, the roller unit 20 is mounted in the second recess 114. The sliding unit 30 is housed in the first recess 111 and can move linearly within it. The spindle 42 is rotatably mounted in the first rotary section 113 and in the fifth recess 312. The rotary section 421 is rotatably mounted with the rotary guide element 113. The spindle unit 40 is therefore rotatably mounted in the base unit 10 and the sliding unit 30. The control unit 50 is housed in the sixth recess 313 and can move within it. Reference is made below to Fig. 14. When the rotating part 41 is turned, the turning section 421 is limited by the two stop edges 1131, so that the spindle 42 can only rotate about its own axis. The second threaded section 521 is pressed against the first threaded section 422 by the spring force of the elastic element 53, so that they engage with each other. As the first threaded section 422 rotates, the control unit 50 moves linearly, thereby linearly displacing the sliding unit 30 within the first recess 111. This allows the user to adjust the distance between the cutting wheel 32 and the roller unit 20 as required. Reference is made here to Fig. 14. When the control unit 50 is pressed, the elastic element 53 is compressed, thereby separating the second threaded section 521 and the first threaded section 422. The user can continue to press and move the control unit 50 to move the sliding unit 30 and adjust the distance between the cutting wheel 32 and the roller unit 20. When the control unit 50 is released, the elastic element 53, through its restoring force, re-establishes the connection between the second threaded section 521 and the first threaded section 422, thus fixing the position. In a further embodiment of the present invention, a cushion can be attached to the first surface 1111 or to the side of the sliding seat 31 opposite the first surface 1111. This cushion absorbs the impact forces that may occur during the movement of the sliding seat 31. In summary, the following advantages, for example, can be achieved with the pipe cutter design according to the invention: 1. The sliding unit 30 is movably arranged in the first recess 111. The base unit 10 and the sliding unit 30 serve to rotatably support the spindle unit 40. The sliding unit 30, in turn, serves to accommodate the control unit 50. The assembly structure consisting of the base unit 10, sliding unit 30, spindle unit 40, and control unit 50 is therefore particularly stable. 2. The control unit 50 controls the engagement and disengagement of the second threaded section 521 and the first threaded section 422 by means of linear movement. The position of the sixth recess 313 can have larger tolerances. After the control unit 50 has been inserted into the sixth recess 313, a slight rotation of the spindle unit 40 is sufficient to engage the second threaded section 521 with the first threaded section 422.This linear control of the connection is very reliable. 3. Since the control unit 50 controls the engagement and disengagement of the second threaded section 521 and the first threaded section 422 by linear movement, the width of the sixth recess 313 can be increased in larger versions of the pipe cutter design, which also allows the control part 52 to be made wider. This allows more teeth of the second threaded section 521 to engage with the first threaded section 422. The number of engaged teeth can be varied by adjusting the width of the sixth recess 313 and the control part 52, enabling a stable and adaptable design. 4. The first axis 3112 and the second axis 3121 intersect perpendicularly at a single point.The axis of the spindle unit 40 is aligned with the second axis 3121, meaning that the axis of the spindle unit 40 is perpendicular to the axis of the cutting wheel 32 and the first axis 3112. The combination of spindle unit 40 and sliding unit 30 thus ensures a particularly stable structure. 5. The forces acting on the cutting wheel 32 are absorbed directly by the sliding unit 30. Since the sliding unit 30 has a large surface area and is connected to the base unit 10 and the spindle unit 40, it can absorb the torque more effectively. 6. There is a structured connection between the base unit 10 and the sliding unit 30, as well as between the sliding unit 30 and the spindle unit 40, and between the spindle unit 40 and the base unit 10. The base unit 10, the sliding unit 30, and the spindle unit 40 are interconnected, which ensures high structural stability and easy assembly. 7.The spindle unit 40 limits the control unit 50, and the control unit 50 is further limited in the area of ​​the elongated hole 315. This means that the control unit 50 is secured by the spindle unit 40 and the sliding unit 30 and cannot fall out. The control unit 50, the sliding unit 30, and the spindle unit 40 are interconnected, providing a particularly stable structure. 8. By rotating the spindle unit 40, the control unit 50 is moved, which in turn moves the sliding unit 30 to adjust the distance between the cutting wheel 32 and the roller unit 20. Alternatively, the control unit 50 can be pressed to disengage the second threaded section 521 from the first threaded section 422, and then pressed and moved further to move the sliding unit 30 and adjust the distance between the cutting wheel 32 and the roller unit 20.The pipe cutter design thus offers two different control mechanisms for adjusting the distance between the cutting wheel 32 and the roller unit 20. 9. The fifth recess 312 has the first arcuate surface 3122 and several second arcuate surfaces 3123. These arcuate surfaces serve to rotatably support the first threaded section 422 and limit its lateral displacement. The spindle 42 has a specific length. The rotating section 421 is supported on the rotary guide element 113, while the first threaded section 422 is additionally supported by the first arcuate surface 3122 and the second arcuate surfaces 3123, which enables stable support of the spindle 42. 10. The sliding unit 30 can first be assembled with the spindle unit 40 and the control unit 50, which facilitates assembly. After combining these three units, the entire assembly is inserted into the base unit 10. 11.The sliding unit 30 is secured by the spindle unit 40 and cannot fall out of the first recess 111. The first guide rail 112 and the second guide rail 316 further prevent the sliding unit 30 from slipping out of the first recess 111. Therefore, the pipe cutter design according to the invention exhibits industrial applicability, novelty, and inventive step, and thus meets the requirements for a patent application. For this reason, a patent application is hereby filed in accordance with the statutory provisions. Reference symbol list 10 Base unit 11 Base body 111 First recess 1111 First surface 1112 Second surface 1113 Third surface 112 First guide rail 113 Rotary guide element 1131 Stop edge 114 Second recess 115 First connecting part 116 Second connecting part 117 Third receiving groove 12 Trimming knife 13 First connecting element 20 Roller unit 21 Roller axle 22 Roller 23 Spacer 30 Sliding unit 31 Sliding block 311 Fourth recess 3111 First pivot hole 3112 First axle 312 Fifth recess 3121 Second axle 3122 First curved surface 3123 Second curved surface 313 Sixth recess 314 Projection 315 Slotted hole 316 Second guide rail 317 Through opening 32 Cutting wheel 321 Cutting edge 322 Second Rotary hole 33 Cutting wheel axle 40 Spindle unit 41 Turned part 411 First coupling section 42 Spindle 421 Turning section 422 First threaded section 423 Second coupling section 424 Third connecting part 43 Coupling piece 44 Washer 45 Second connecting element 46 Cover 50 Control unit51 Pressure element 511 Seventh recess 512 Eighth recess 513 Third guide rail 514 Fourth connecting part 52 Control part 521 Second threaded section 522 Fourth guide rail 523 Fifth connecting part 524 Spring holder 53 Elastic element 54 Third connecting element

Claims

A pipe cutter construction comprising a base unit (10), two roller units (20), a sliding unit (30), a spindle unit (40), and a control unit (50), characterized in that: - the base unit (10) has two base bodies (11); - the two base bodies (11) are connected to each other, with a first recess (111) at one end of each base body (11) having a first surface (1111), a second surface (1112), and a third surface (1113), wherein the first surface (1111) and the second surface (1112) are spaced apart from each other and are parallel to each other, and the third surface (1113) is arranged between the first surface (1111) and the second surface (1112), wherein the third surface (1113) is perpendicular to the first surface (1111) and the second surface (1112), and wherein the base body (11) has a first guide rail (112) which leads into the first recess (111),and the longitudinal direction of the first guide rail (112) coincides with the longitudinal direction of the first recess (111), wherein the first guide rail (112) is designed as an elongated groove element; - that a rotary guide element (113) is arranged at one end of the base body (11), which is located on one side of the first recess (111), wherein the two sides of the rotary guide element (113) are provided with two stop edges (1131) which extend coaxially to the rotary guide element (113) and are connected to the first recess (111); - that a second recess (114) is located at the other end of the base body (11), which is located opposite the first recess (111) and is spaced apart from it; - that each roller unit (20) is rotatably mounted in the second recess (114); - that the sliding unit (30) is mounted in the first recess (111). is and can move within itwherein the sliding unit (30) is linearly displaceable between the first surface (1111) and the second surface (1112) and the sliding unit (30) is arranged close to the first surface (1111) or the second surface (1112), wherein the sliding unit (30) has a sliding seat (31), a cutting wheel (32) and a cutting wheel axis (33);- that the sliding seat (31) is housed in the first recess (111) and moves linearly therein, wherein one end of the sliding seat (31) is provided with a fourth recess (311) which points in the direction of the second recess (114), wherein the fourth recess (311) is provided with a first pivot hole (3111) which opens into the fourth recess (311), and the sliding seat (31) has a fifth recess (312) which extends longitudinally through the sliding seat (31), wherein the fifth recess (312) is provided with a second axis (3121) which is perpendicular to and intersects the first axis (3112),and wherein the fifth recess (312) has a first arcuate surface (3122) and several second arcuate surfaces (3123), the second arcuate surfaces (3123) being arranged one after the other along the longitudinal direction of the fifth recess (312), the first arcuate surface (3122) being arranged between the two second arcuate surfaces (3123); that the other end of the sliding seat (31) is provided with a sixth recess (313), the fifth recess (312) being located between the sixth recess (313) and the fourth recess (311), the sixth recess (313) being neither circular nor rectangular, the sliding seat (31) having a projection (314) extending along the depth of the sixth recess (313) and running linearly along the third surface (3113), the sliding seat (31) being provided with an elongated hole (315). is, which leads into the sixth recess (313),and wherein two second guide rails (316) are arranged on the upper and lower sides of the sliding seat (31), which engage with the first guide rails (112) of the base body (11), wherein the second guide rails (316) and the sliding seat (31) extend in the same direction so that the sliding unit (30) can slide linearly on the base unit (10), and wherein the two second guide rails (316) are designed as elongated strips;- that the cutting wheel (32) is rotatably mounted in the fourth recess (311) and is designed as a round cutting tool, wherein the outer circumference of the cutting wheel (32) is provided with a cutting edge (321) for cutting a tube, and wherein the cutting wheel (32) is provided with a second pivot hole (322) which is aligned with the first pivot hole (3111);- that the cutting wheel axis (33) passes through the first pivot hole (3111) and the second pivot hole (322) runs,such that the cutting wheel (32) is rotatably mounted in the fourth recess (311); that the spindle unit (40) is rotatably mounted in the base unit (10) and the sliding unit (30) and comprises a rotating part (41) and a spindle (42); that the rotating part (41) is rotatably mounted on the outside of the base unit (10) and serves for rotation, wherein the rotating part (41) is provided with a first coupling section (411); that the spindle (42) is provided with a rotating section (421) which is rotatably mounted in the rotary guide element (113), wherein the two sides of the rotating section (421) bear against the stop edges (1131) so that the spindle (42) is held firmly in the base unit (10), and wherein one end of the spindle (42) is provided with a first threaded section (422) which is rotatably mounted in the fifth recess (312), and wherein the axis of the first thread section (422) is aligned with the second axis (3121),wherein the first threaded section (422) is either not in contact with the first arcuate surface (3122) and the second arcuate surfaces (3123) or is arranged in a loose fit with them, and wherein the other end of the spindle (42) is provided with a second coupling section (423) which is coupled to the first coupling section (411) of the rotating part (41), wherein the second coupling section (423) and the first coupling section (411) are identical in form and function and the rotating part (41) causes the spindle (42) to rotate;- that the rotating section (421) is limited by the stop edges (1131), whereby the spindle (42) is rotatably mounted in the base unit (10) and the sliding unit (30), wherein the rotating part (41) is in turn limited by the spindle (42) and is rotatably mounted on the outside of the base unit (10),and wherein the spindle unit (40) is thus rotatably mounted in the base unit (10) and the sliding unit (30);- that the control unit (50) is mounted together with the sliding unit (30) and the spindle unit (40), wherein the control unit (50) is housed in and can move within the sixth recess (313), with a part of the control unit (50) protruding from the sixth recess (313) to be actuated by the user, and wherein the control unit (50) can move the sliding unit (30) linearly in the first recess (111), and wherein the control unit (50) comprises a pressure element (51), a control part (52), an elastic element (53), and a third connecting part (54);- that the sliding unit (30) moves within the base unit (10), while the control unit (50) moves on the sliding unit (30),wherein the direction of movement of the control unit (50) is oriented perpendicular to the direction of movement of the sliding unit (30); that the pressure element (51) is housed in the sixth recess (313), wherein a part of the pressure element (51) projects out of the sixth recess (313), and wherein the pressure element (51) is provided with a seventh recess (511) which serves to receive the spindle (42), and wherein at one end of the pressure element (51) there is an eighth recess (512) which is open, and wherein the pressure element (51) has a third guide rail (513) which is arranged between the seventh recess (511) and the eighth recess (512) and is designed as opposing upper and lower grooves, and wherein the pressure element (51) is also provided with a fourth connecting part (514) which is designed as a through hole and extends vertically through the eighth recess (512) runs,and wherein the pressure element (51) has the form of a non-round block; that the control part (52) is mounted together with the pressure element (51) and is housed inside the eighth recess (512), wherein at one end of the control part (52) there is a second threaded section (521) which engages with the first threaded section (422), and wherein fourth guide rails (522) are attached to the upper and lower sides of the control part (52) which engage with the third guide rails (513) of the pressure element (51), and wherein the fourth guide rails (522) are designed as protruding ribs, wherein the control part (52) also has a fifth connecting part (523) which is aligned with the fourth connecting part (514) and is designed as a through hole, and wherein at the other end of the control part (52) there is a spring receptacle (524) which is separate from the second threaded section (521),and wherein the control part (52) has a non-round shape;- that the elastic element (53) is housed in the spring receptacle (524), wherein one end of the elastic element (53) rests against the spring receptacle (524), while the other end rests against the bottom of the sixth recess (313), and wherein the second threaded section (521) can be pressed against the first threaded section (422) by the spring force of the elastic element (53) and engages with it, and wherein the elastic element (53) is designed as a spring;- that the third connecting part (54) passes through the fourth connecting part (514) and the fifth connecting part (523), wherein one end of the third connecting part (54) projects into the elongated hole (315), and wherein the third connecting part (54) moves within the elongated hole (315),wherein the control unit (50) can be mounted on the sliding unit (30) and can be moved by a certain distance; - that the spindle unit (40) limits the control part (52), while the control part (52) limits the pressure element (51), whereby the control unit (50) is securely mounted on the sliding unit (30) and cannot fall out, and wherein the third connecting part (54) connects the pressure element (51) and the control part (52) together and is additionally limited in the area of ​​the elongated hole (315), whereby the control unit (50) is securely mounted on the sliding unit (30) and cannot fall out, and wherein the control unit (50) as a whole is secured by both the spindle unit (40) and the sliding unit (30) and remains firmly in its position; and- that the pressure element (51) and the control part (52) move within the sixth recess (313) by pressing the control unit (50), whereby the elastic element (53) is compressed,that the second threaded section (521) disengages from the first threaded section (422), which allows the control unit (50) to move, which in turn moves the sliding unit (30) to adjust the distance between the cutting wheel (32) and the roller unit (20), and wherein the elastic element (53) restores its spring force upon release, causing the second threaded section (521) to re-engage with the first threaded section (422) and thus be positioned there. Pipe cutter construction according to claim 1, characterized in that the two base bodies (11) are arranged opposite each other and are designed symmetrically. Pipe cutter construction according to claim 1, characterized in that the two rotary guide elements (113) are aligned to each other and together form a round opening, wherein each rotary guide element (113) is designed as a semicircular indentation, and the two stop edges (1131) are also semicircular and together form a round opening, the diameter of which is smaller than that of the rotary guide elements (113). Pipe cutter construction according to claim 1, characterized in that the base body (11) is provided with a first connecting part (115) which is designed as a through hole on one base body (11) and as an internal threaded hole on the other base body (11), wherein each base body (11) is additionally provided with several second connecting parts (116), wherein the second connecting parts (116) are designed as round recesses on one base body (11) and as round projections on the other base body (11), such that the second connecting parts (116) of the two base bodies (11) form a positive fit, and wherein the base unit (10) is also provided with a first connecting element (13) which is designed as an external threaded element and passes through the two first connecting parts (115) to connect the two base bodies (11) to each other, wherein the first connecting element (13) is designed as a screw element. Pipe cutter construction according to claim 1, characterized in that the base body (11) is provided with a third recess (117) which is designed as an elongated opening, wherein the base unit (10) is also provided with a trimming knife (12) which is mounted in the third recess (117) and can move within the third recess (117). Pipe cutter construction according to claim 1, characterized in that: - each roller unit (20) has a roller axle (21), three rollers (22) and two spacers (23); - the roller axle (21) is rotatably mounted in the second recess (114) and has a round rod shape; and - the three rollers (22) and the two spacers (23) are arranged alternately, the rollers (22) and the spacers (23) being rotatably mounted on the roller axle (21), and the rollers (22) being located at the outer ends. Pipe cutter construction according to claim 2, characterized in that the first rotary hole (3111) is designed as a through hole; and that the sliding seat (31) is provided with several through openings (317) which are arranged at a suitable distance from each other, wherein the through openings (317) are aligned with the second arc surfaces (3123), wherein the number of through openings (317) is three. Pipe cutter construction according to claim 1, characterized in that the cutting wheel axis (33) is selected from a group comprising an elongated rod and a threaded rod. Pipe cutter construction according to claim 7, characterized in that the first coupling section (411) is designed as a non-round recess, while inside the second coupling section (423) there is a third connecting part (424) which is designed as an internal thread. Pipe cutter construction according to claim 9, characterized in that: - the spindle unit (40) comprises a coupling piece (43), a washer (44), a second connecting part (45) and a cover (46); - the coupling piece (43) is arranged between the rotating part (41) and the base unit (10) to reduce the friction between the rotating part (41) and the base unit (10), wherein the coupling piece (43) is made of a soft material and has frictional losses; - the washer (44) is located inside the rotating part (41); - the second connecting part (45) is designed as an externally threaded rod and is guided through the washer (44) and screwed into the third connecting part (424); and - the cover (46) is attached to the open end of the rotating part (41) to close its opening. Pipe cutter construction according to claim 2, characterized in that a cushion is attached to the first surface (1111) or to the side of the sliding seat (31) opposite the first surface (1111), which absorbs the impact when the sliding seat (31) is moved.

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