Rotating wheel pipe groove spacing adjusting structure of pipe bending machine

Abstract

The utility model belongs to the technical field of pipe benders, and particularly relates to a rotating wheel pipe groove spacing adjusting structure of a pipe bender. In order to overcome the defects that the position of a rotating wheel assembly of an existing pipe bending machine is adjusted through sliding, a cross beam is fixed to a machine base through screws, and storage is inconvenient, the technical scheme is adopted as follows: the rotating wheel pipe groove spacing adjusting structure of the pipe bending machine comprises the machine base; the number of the cross beams is two; the number of the rotating wheel assemblies is two; wherein the two cross beams are both connected with the machine base in a swinging mode, and the two cross beams are switched between working positions through swinging; wherein a plurality of working limiting structures and / or working positioning structures are formed on the machine base, so that the cross beam is kept at each working position during pipe bending. The utility model has the beneficial effects that one cross beam in the prior art is divided into two parts, and the left cross beam and the right cross beam are connected with the base in a swinging manner, which is different from a sliding adjustment manner; and only the cross beam needs to be rotated during storage, so that the operation is convenient, and the cross beam is not easy to lose.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipe bending machines, and particularly relates to a runner pipe groove spacing adjustment structure of a pipe bending machine. Background Art

[0002] The basic principle of an existing type of pipe bending machine is to set up two horizontally distributed wheel assemblies and a horizontal reciprocating top wheel perpendicular to the plane where the rotation axes of the two wheel assemblies are located. The wheel assembly includes a wheel with a pipe groove. The pipe to be bent (usually a copper pipe) is placed in the pipe groove of the two wheels. The top wheel is driven manually or electrically to move toward the wheel to bend the pipe to be bent.

[0003] To reduce the number of beams and runners, runners with a variety of pipe grooves of varying diameters and orientations are typically used. By adjusting the left-right lengthwise position of the two runners on the same beam (usually three positions, or spacings, are sufficient), the system can accommodate pipes of varying diameters. For relevant information, please refer to the applicant's prior applications, such as Grant Publication No. CN217018110U - A Pipe Bender's Rotor Adjustment Structure and Grant Publication No. CN220760756U - A Pipe Bender's Rotor Spacing Adjustment Structure.

[0004] However, the above structures all have the following problems: 1. The wheel assembly slides relative to the crossbeam, and the sliding structure is prone to sliding unsmoothly during operation; 2. The crossbeam is fixed to the machine base and cannot be retracted, occupying a large space. Summary of the Invention

[0005] The utility model addresses the shortcomings of the existing pipe bending machine in that the position of the wheel assembly is adjusted by sliding and the crossbeam is fixed to the machine base by screws, which makes it inconvenient to store. The utility model provides a wheel pipe groove spacing adjustment structure for the pipe bending machine. The distance between the two wheel pipe grooves can be adjusted by swinging the crossbeam, thereby improving the user experience. At the same time, the fixed crossbeam is improved to a swingable one, which makes it possible to store the crossbeam without removing it.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a pipe bending machine runner pipe groove spacing adjustment structure, the pipe bending machine runner pipe groove spacing adjustment structure includes:

[0007] base;

[0008] There are two crossbeams, which are symmetrically arranged on the left and right sides of the machine base with the machine base as the center;

[0009] There are two sets of runner assemblies, which are respectively arranged on the two crossbeams and include runners, each having a plurality of pipe grooves of different pipe diameters;

[0010] Wherein, the two crossbeams are both connected to the machine base in a swinging manner, and the two crossbeams are switched between various working positions by swinging;

[0011] Wherein, a plurality of working limit structures and / or working positioning structures are formed on the machine base, so that the crossbeam is kept in various working positions when bending the pipe.

[0012] The wheel pipe groove spacing adjustment structure of the pipe bending machine of the present invention divides a fixed crossbeam in the prior art into two and makes the two crossbeams swingably connected to the machine base. The crossbeam switches between various working positions by swinging, changing the sliding in the prior art to swinging, which is more convenient to operate; multiple working limit structures and / or working positioning structures are formed on the machine base, so that the crossbeams are kept in various working positions when bending the pipe, ensuring that the pipe bending machine can work normally.

[0013] As an improvement, the working limit structure and / or working positioning structure includes a force-bearing component that can be raised and lowered and mounted on the machine base, and the force-bearing component is moved in and out of the swinging path of the beam by being raised and lowered. The working limit structure or working positioning structure preferably has a force-bearing component that can be raised and lowered, and the force-bearing component is mounted on the machine base and does not swing, and is moved in and out of the swinging path of the beam by being raised and lowered. When the force-bearing component is on the swinging path of the beam, the beam is positioned or limited, and when the force-bearing component is removed from the swinging path of the beam by being raised and lowered, the beam can swing. In other schemes, the force-bearing component used for positioning or limiting can also be movable by means of translation or the like; the force-bearing component can also be mounted on the beam and swing with the beam.

[0014] As an improvement, the working positioning structure includes a lifting hole opened on the beam, a positioning pin movably arranged in the lifting hole, a working positioning hole opened on the machine base, an elastic member for moving the positioning pin toward the working positioning hole, and an operating member fixedly connected to the positioning pin. In the working state, the positioning pin is located in the working positioning hole.

[0015] As an improvement, the working limit structure includes a first working limit portion formed on the machine base in the left and right directions. When the crossbeam is located at the first working position, the crossbeam abuts against the first working limit portion when bending the pipe.

[0016] The swing center of the beam is located at its end close to one end of the machine base. The machine base includes a base in the center direction and left and right mounting parts extending from the base to the left and right directions. Both mounting parts have a bottom wall and a lateral side wall. The lateral side wall is located in front of the beam and forms the first working limit part. One end of the beam is located in the mounting groove.

[0017] As an improvement, the working limit structure also includes a lifting hole opened on the machine base, a limit pin arranged in the lifting hole, an elastic member for causing the limit pin to extend out of the lifting hole, and an operating member fixedly connected to the limit pin. The crossbeam forms a convex portion near one end of the machine base. In the working state, the limit pin extends out of the lifting hole and abuts against the convex portion of the crossbeam, and the limit pin forms a second working limit portion.

[0018] As an improvement, the wheel tube groove spacing adjustment structure of the pipe bending machine also includes a stopping structure, which includes a stopping groove opened on the limit pin and a stopping piece arranged on the machine base, the limit pin is rotatably connected to the machine base, the stopping groove includes a vertical section at the bottom and a horizontal section at the top that are connected, the stop piece is located in the stopping groove, when the stop piece is located in the horizontal section of the stopping groove, the elastic piece is compressed, and the upper end of the limiting pin does not extend out of the lifting hole, and when the stop piece is located in the vertical section of the stopping groove, the upper end of the limiting pin extends out of the lifting hole under the action of the elastic piece.

[0019] As an improvement, the working limit structure includes a first working limit portion formed on the machine base in the left and right directions. When the crossbeam is located at the first working position, the crossbeam abuts against the first working limit portion when bending the pipe.

[0020] The rotation center of the beam is located in its middle. The machine base includes a base in the central direction and left and right mounting parts extending from the front end of the base to the left and right directions. Both mounting parts include a bottom wall and a lateral side wall. The lateral side wall is located behind the beam and forms the first working limit part.

[0021] As an improvement, the working limit structure further includes a receiving hole provided in the machine base, a force-bearing block movably arranged in the receiving hole, an elastic member for causing the force-bearing block to extend out of the receiving hole, and an operating member fixedly connected to the force-bearing block;

[0022] The pipe bending machine's runner pipe groove spacing adjustment structure further includes a stop structure, wherein the stop structure includes a stop member movably connected to the operating member, and when the stop member directly or indirectly abuts against the machine base under the action of the elastic member, the force block is fixed;

[0023] There is one stress-bearing block, and when bending the pipe, both crossbeams abut against the same stress-bearing block, or there are two stress-bearing blocks.

[0024] As an improvement, the elastic member is a spring sheet, one end of the spring sheet is fixed to the crossbeam, and the other end is fixed to the positioning pin; or,

[0025] The elastic member is a compression spring, a spring seat is provided on the machine base, the compression spring is sleeved outside the limit pin, the lower end of the compression spring abuts the spring seat, the upper end abuts the limit pin, and the lower end of the operating member is exposed on the spring seat.

[0026] As an improvement, the wheel tube groove spacing adjustment structure of the pipe bending machine further includes a swing assembly, the swing assembly includes a swing shaft, a locking screw and an anti-slip screw, the locking screw locks the swing shaft to the crossbeam, a swing hole adapted to the swing shaft is provided on the machine base, the swing shaft is located in the swing hole, a circumferential annular groove is provided on the swing shaft, an anti-slip threaded hole is provided on the machine base, the anti-slip screw is screwed into the anti-slip threaded hole, and the inner end of the anti-slip screw is located in the annular groove; or,

[0027] The crossbeam includes a U-shaped portion, and the machine base has an insertion portion in the left and right directions. The opening of the U-shaped portion is horizontal and is sleeved on the insertion portion. The crossbeam and the machine base are rotatably connected by a swing screw vertically installed on the U-shaped portion and the insertion portion. The swing screw is threadedly connected to the U-shaped portion, and the swing screw is clearance-matched with the machine base.

[0028] As an improvement, the working limit structure and / or working positioning structure includes a receiving hole opened on the machine base, a lifting component movably arranged in the receiving hole, and an elastic member arranged on the lifting component. The lower end of the machine base is opened with a tapered hole that is larger at the bottom and smaller at the top. When bending the pipe, the lifting component extends out of the receiving hole under human action, and the lifting component is maintained in the force-bearing position through the elastic deformation of the elastic member.

[0029] As an improvement, the maximum swing angle of the beam is 90°;

[0030] The wheel pipe groove spacing adjustment structure of the pipe bending machine also includes a top wheel arranged on the machine base and moving back and forth in the front and rear directions.

[0031] The beneficial effects of the runner pipe groove spacing adjustment structure of the pipe bending machine of the present invention are: a beam in the prior art is divided into two, and the left and right beams are swingably connected to the machine base, and the two beams realize the position adjustment of the runner assembly by swinging (also changing the distance between the pipe grooves of the two wheels required for bending pipes of different diameters), which is different from the sliding adjustment method; when storing, only the beam needs to be rotated, which is easy to operate and the beam is not easy to be lost; the beam can be assembled with the machine base before leaving the factory and does not need to be installed by the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 and Figure 2 It is a structural schematic diagram of different angles of the runner tube groove spacing adjustment structure of the tube bending machine of Example 1 of the present utility model.

[0033] Figure 3 It is a cross-sectional view of the runner tube groove spacing adjustment structure of the tube bending machine according to the first embodiment of the present utility model.

[0034] Figure 4 and Figure 5 It is a structural schematic diagram of different angles of the runner tube groove spacing adjustment structure of the tube bending machine of the second embodiment of the present utility model.

[0035] Figure 6 It is a cross-sectional view of the runner tube groove spacing adjustment structure of the tube bending machine in the second embodiment of the present utility model.

[0036] Figure 7 and Figure 8 It is a schematic diagram of different states of the stop structure of the runner tube groove spacing adjustment structure of the pipe bending machine in embodiment 2 of the present utility model.

[0037] Figure 9 and Figure 10 It is a structural schematic diagram of different angles of the runner tube groove spacing adjustment structure of the tube bending machine of the third embodiment of the present utility model.

[0038] Figure 11 and Figure 12 It is a cross-sectional view of different states of the runner tube groove spacing adjustment structure of the tube bending machine of the third embodiment of the present utility model.

[0039] Figure 13 It is a schematic diagram of the swing structure of the runner tube groove spacing adjustment structure of the tube bending machine in embodiment 3 of the present utility model.

[0040] Figure 14 and Figure 15 It is a structural schematic diagram of different angles of the runner tube groove spacing adjustment structure of the tube bending machine of the fourth embodiment of the present utility model.

[0041] Figure 16 It is a three-dimensional structural schematic diagram of the runner tube groove spacing adjustment structure of the tube bending machine of the fourth embodiment of the present utility model.

[0042] Figure 17 yes Figure 14 Cross-sectional view along the BB direction.

[0043] Figure 18 and Figure 19 It is a cross-sectional view of different states of the runner tube groove spacing adjustment structure of the tube bending machine of the fifth embodiment of the present utility model.

[0044] In the figure, 1, base; 11, base; 12, mounting portion; 13, mounting groove; 131, bottom wall; 132, lateral side wall; 133, center side wall; 134, fillet; 14, swing hole; 15, positioning hole; 16, lifting hole;

[0045] 2. beam; 21. arc surface; 22. convex portion;

[0046] 3. Swing assembly; 31. Swing screw; 32. Swing shaft; 33. Locking screw; 34. Anti-slip screw;

[0047] 4. Rotor assembly;

[0048] 5. Fixed limit assembly; 51. Positioning pin; 581. Stop groove; 52. Elastic member; 53. Operating member; 54. Spring seat; 55. Stop member; 56. Force block; 57. Elastic member; 58. Limit pin. DETAILED DESCRIPTION

[0049] The following is an explanation and description of the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0050] Example 1

[0051] See also Figures 1 to 3 The utility model provides a pipe bending machine runner pipe groove spacing adjustment structure, the pipe bending machine runner pipe groove spacing adjustment structure includes:

[0052] Base 1;

[0053] There are two crossbeams 2 and they are symmetrically arranged on the left and right sides of the base 1 with the base 1 as the center;

[0054] There are two runner assemblies 4, which are respectively arranged on the two crossbeams 2 and include runners, each having a plurality of pipe grooves of different diameters;

[0055] The two crossbeams 2 are both swingably connected to the machine base 1, and the two crossbeams 2 are switched between various working positions by swinging;

[0056] A working limit structure and a working positioning structure are formed on the machine base 1 so that the crossbeam 2 is kept in various working positions when bending the pipe.

[0057] See also Figure 1 and Figure 2 , the local structure of the pipe bender of this embodiment. Figure 1 In the figure, the left crossbeam 2 is in the storage state (usually not working at this time), and the right crossbeam 2 is in the first working position where the pipe grooves of the two wheels are farthest apart (suitable for pipes with larger diameters to be bent). Figure 2In the figure, the left crossbeam 2 is in the second working position where the pipe grooves of the two wheels are relatively close to each other, and the right crossbeam 2 is in the first working position where the pipe grooves of the two wheels are farthest apart. The position of the crossbeam 2 in the storage state can also be used as the third working position. In normal use or storage, the state of the two crossbeams 2 is the same, that is, symmetrical. Figure 1 and Figure 2 The state in FIG is for illustration only. The structure of the base 1 is shown in FIG.

[0058] See also Figure 3 In this embodiment, the crossbeam 2 includes a U-shaped portion near one end of the base 1. The base 1 has a left-right insertion portion. The opening of the U-shaped portion is horizontal and fits over the insertion portion. The crossbeam 2 and the base 1 are rotatably connected by a swing screw 31 vertically installed in the U-shaped portion and the insertion portion. (The rotation angle is limited by other structures, so that the crossbeam 2 can only swing and cannot rotate 360° in one direction.) The swing screw 31 is installed from top to bottom. The upper parallel wall of the U-shaped portion of the crossbeam 2 has a countersunk hole, and the lower parallel wall has a threaded hole. The swing screw 31 is threadedly connected to the lower parallel wall of the U-shaped portion, and the swing screw 31 has a clearance fit with the base 1. The area where the swing screw 31 fits with the base 1 can be smooth, that is, without threads.

[0059] See also Figure 1 and Figure 2 In this embodiment, the working limit structure includes a first working limit portion formed in the left and right directions on the machine base 1. When the beam 2 is located at the first working position, the beam 2 abuts against the first working limit portion when bending the pipe. Figure 1 and Figure 2 In the drawing, the width direction is the left and right direction of the pipe bender, the length direction is the front and back direction of the pipe bender, the upper end of the drawing is the front, and the lower end is the back.

[0060] In this embodiment, the swing center of the beam 2 is located at its end close to one end of the machine base 1. The machine base 1 includes a base 11 in the center direction and left and right mounting parts 12 extending from the base 11 to the left and right directions. Both mounting parts 12 have a mounting groove 13. The mounting groove 13 has a bottom wall 131 and a lateral side wall 132. The lateral side wall 132 is located in front of the beam 2 and forms the first working limit portion. One end of the beam 2 is located in the mounting groove 13.

[0061] In this embodiment, the installation groove 13 of the crossbeam 2 further has a central side wall 133 . When the crossbeam 2 is in contact with the central side wall 133 , the crossbeam 2 is located in the storage position.

[0062] In this embodiment, a rounded corner 134 is formed between the lateral sidewall 132 and the central sidewall 133 of the mounting portion 12 of the base 1. An end of the crossbeam 2 close to the base 1 is formed as an arc surface 21.

[0063] See also Figure 3 In this embodiment, the working positioning structure includes a lifting hole 16 defined in the crossbeam 2, a positioning pin 51 movably disposed in the lifting hole 16, a working positioning hole 15 defined in the base 1, an elastic member 52 for moving the positioning pin 51 toward the working positioning hole 15, and an operating member 53 fixedly connected to the positioning pin 51. In the working state, the positioning pin 51 is located in the working positioning hole 15. To facilitate the positioning pin 51 to enter the working positioning hole 15 of the base 1, the working positioning hole 15 can be chamfered.

[0064] In this embodiment, there is only one working positioning hole 15 on the machine base 1. In other embodiments, there may be multiple working positioning holes 15 on the machine base 1, such as providing a working positioning hole 15 at the corresponding storage position so that the storage position of the crossbeam 2 is also the third working position.

[0065] In this embodiment, the elastic member 52 is a spring sheet, one end of which is fixed to the crossbeam 2 by a screw, and the other end is fixed to the positioning pin 51 by an operating member 53. The operating member 53 is threadedly connected to the positioning pin 51. A long groove is formed in the spring sheet to accommodate the change in the position of the operating member 53 relative to the spring sheet during deformation of the spring sheet.

[0066] In this embodiment, the wheel assembly 4 includes an axle fixed to the crossbeam 2, and a wheel rotatably connected to the axle. The wheel has multiple pipe slots with different pipe diameters and is cylindrical or regular polygonal in shape. In other embodiments, the wheel assembly 4 may also adopt other structures, such as using a wheel with other structures. The specific structure can refer to the existing technology.

[0067] In this embodiment, the maximum swing angle of the beam 2 is 90°.

[0068] In this embodiment, other structures of the pipe bender can refer to the prior art.

[0069] The working principle of the wheel pipe groove spacing adjustment structure of the pipe bending machine of this embodiment is as follows: usually, the two beams 2 are initially located in the storage position; when the pipe needs to be bent, since the two beams 2 are swingably connected to the same machine base 1 (achieved by the U-shaped portion at the end of the beam 2, the insertion portion of the machine base 1 and the swing screw 31), the wheel assembly 4 can be operated at this time (of course, the beam 2 can also be operated, and operating the wheel assembly 4 is more convenient than operating the beam 2) to make the beam 2 rotate to the second working position or the first working position in turn; when the beam 2 rotates to the second working position, the positioning pin 51 will enter the positioning hole 15 of the machine base 1 under the action of the spring sheet, so that the beam 2 cannot rotate; when the second working position is not the required position, the operating member 53 can be manipulated to overcome the force of the spring sheet and pull the positioning pin 51 out of the positioning hole 15. At this time, the beam 2 is continued to be rotated so that the beam 2 reaches the first working position in contact with the transverse side wall 132; when the beam 2 is in the first working position, there is no need to position the beam 2; when the beam 2 is in any working position, the corresponding pipe to be bent can be placed in the corresponding pipe groove of the two rotating wheels for pipe bending operation.

[0070] The beneficial effects of the wheel pipe groove spacing adjustment structure of the pipe bending machine of the first embodiment of the present invention are: a beam 2 in the prior art is divided into two, and the left and right beams 2 are swingably connected to the machine base 1. The two beams 2 realize the position adjustment of the wheel assembly 4 by swinging (also changing the distance between the pipe grooves of the two wheels required for bending pipes of different diameters). Unlike the sliding adjustment method, the operation is more convenient; when storing, only the beam 2 needs to be rotated, which is easy to operate and the beam 2 is not easy to lose; the spring sheet, operating member 53 and positioning pin 51 of the positioning structure will not be separated from the beam 2, and are not easy to lose compared to simply using the positioning pin 51 and other methods.

[0071] Example 2

[0072] See also Figures 4 to 8 The runner tube groove spacing adjustment structure of the pipe bender of the second embodiment of the present invention comprises:

[0073] Base 1;

[0074] There are two crossbeams 2 and they are symmetrically arranged on the left and right sides of the base 1 with the base 1 as the center;

[0075] There are two runner assemblies 4, which are respectively arranged on the two crossbeams 2 and include runners, each having a plurality of pipe grooves of different diameters;

[0076] The two crossbeams 2 are both swingably connected to the machine base 1, and the two crossbeams 2 are switched between various working positions by swinging;

[0077] Two working limit structures are formed on the machine base 1 so that the crossbeam 2 can be kept at various working positions when bending the pipe.

[0078] In this embodiment, the swing center of the beam 2 is located at its end close to one end of the machine base 1. The machine base 1 includes a base 11 in the center direction and left and right mounting parts 12 extending from the base 11 to the left and right directions. Both mounting parts 12 have a bottom wall 131 and a lateral side wall 132. The lateral side wall 132 is located in front of the beam 2 and forms the first working limit part. One end of the beam 2 is located in the mounting groove 13.

[0079] See also Figure 6 In this embodiment, the wheel tube groove spacing adjustment structure of the pipe bending machine also includes a swinging assembly 3, the swinging assembly 3 includes a swinging shaft 32 and a locking screw 33, a countersunk hole is provided on the crossbeam 2 (so that the locking screw 33 will not interfere with the top wheel when the locking screw 33 is installed from top to bottom), the swinging shaft 32 is provided with a locking threaded hole, and the locking screw 33 passes through the countersunk hole and is screwed into the locking threaded hole, and a swinging hole 14 adapted to the swinging shaft 32 is provided on the machine base 1, the swinging shaft 32 is located in the swinging hole 14, and a circumferential annular groove is provided on the swinging shaft 32, the wheel tube groove spacing adjustment structure of the pipe bending machine also includes an anti-slip screw 34, an anti-slip threaded hole is provided on the machine base 1, the anti-slip screw 34 is screwed into the anti-slip threaded hole, and the inner end of the anti-slip screw 34 is located in the annular groove.

[0080] In this embodiment, the crossbeam 2 is in the shape of a flat plate.

[0081] Compared to the first embodiment, this embodiment does not employ a positioning structure between the crossbeam 2 and the base 1. In this embodiment, the working limit structure includes a first working limit portion formed in the left and right directions on the base 1. When the crossbeam 2 is in the first working position, the crossbeam 2 abuts against the first working limit portion during pipe bending.

[0082] See also Figure 4 and Figure 5 In this embodiment, the working limit structure further includes a lifting hole 16 defined in the base 1, a limit pin disposed in the lifting hole 16, a spring member 52 for causing the limit pin to extend out of the lifting hole 16, and an operating member 53 fixedly connected to the limit pin. A protrusion 22 is formed on one end of the crossbeam 2 near the base 1. In the working state, the limit pin extends out of the lifting hole 16 and abuts the protrusion 22 of the crossbeam 2, forming a second working limit portion. When the crossbeam 2 is in the first working position, the protrusion 22 of the crossbeam 2 also abuts the base 1. Therefore, in other embodiments, the working limit structure may not require a first working limit portion located in the left and right directions in front of the crossbeam 2.

[0083] In this embodiment, the elastic member 52 is a compression spring, and a spring seat 54 is provided on the machine base 1. The compression spring is sleeved outside the limit pin 58. The lower end of the compression spring abuts the spring seat 54, and the upper end abuts the limit pin 58. The lower end of the operating member 53 is exposed on the spring seat 54.

[0084] See also Figure 7 and Figure 8 In this embodiment, the wheel tube groove spacing adjustment structure of the pipe bending machine also includes a stopping structure, which includes a stopping groove 581 provided on the limiting pin 58 and a stopping member 55 provided on the machine base 1, the limiting pin is rotatably connected to the machine base 1, the stopping groove 581 includes a vertical section at the bottom and a horizontal section at the top that are connected, the stopping member 55 is located in the stopping groove 581, when the stopping member 55 is located in the horizontal section of the stopping groove 581, the elastic member 52 is compressed, and the upper end of the limiting pin 58 does not extend out of the lifting hole 16, and when the stopping member 55 is located in the vertical section of the stopping groove 581, the upper end of the limiting pin extends out of the lifting hole 16 under the action of the elastic member 52.

[0085] In this embodiment, the retaining groove 581 is T-shaped. In other embodiments, for easier operation, the retaining groove 581 is preferably L-shaped.

[0086] The working principle of the wheel pipe groove spacing adjustment structure of the pipe bending machine of this embodiment is as follows: usually, initially, the two cross beams 2 are in the storage position (the length direction of the cross beam 2 is parallel to the front-rear direction of the machine base 1); when the pipe needs to be bent, since the two cross beams 2 are swingably connected to the same machine base 1 (achieved by the U-shaped portion at the end of the cross beam 2, the insertion portion of the machine base 1 and the swing screw 31), the wheel assembly 4 can be operated at this time (of course, the cross beam 2 can also be operated, and operating the wheel assembly 4 is more convenient than operating the cross beam 2) to rotate the cross beam 2 to the second working position or the first working position in turn; when the cross beam 2 rotates to the second working position, the operating member 53 can be rotated to make the stop screw move relative to the stop groove 581 to a position where the horizontal section is directly opposite to the vertical section, At this time, the limit pin will extend out of the limit hole of the machine base 1 under the action of the compression spring. If the pipe is bent at this time, the protrusion 22 of the beam 2 will apply a force to the base 11 toward the center direction of the machine base 1 on the limit pin, and the beam 2 will be unable to move. When the second working position is not the required position, the operating member 53 can be manipulated to overcome the force of the compression spring so that the upper end of the limit pin completely enters the lifting hole 16, and the beam 2 is located above the limit pin. The beam 2 is continued to be rotated so that the beam 2 reaches the first working position in contact with the horizontal side wall 132. When the beam 2 is in the first working position, there is no need to position the beam 2. When the beam 2 is in any working position, the corresponding pipe to be bent can be placed in the corresponding pipe groove of the two wheels for pipe bending.

[0087] The beneficial effects of the wheel pipe groove spacing adjustment structure of the pipe bending machine of the second embodiment of the present invention are: a beam 2 in the prior art is divided into two, and the left and right beams 2 are swingably connected to the machine base 1, and the two beams 2 realize the position adjustment of the wheel assembly 4 by swinging (also changing the distance between the pipe grooves of the two wheels required for bending pipes of different diameters), which is different from the sliding adjustment method and is more convenient to operate; when storing, only the beam 2 needs to be rotated, which is easy to operate and the beam 2 is not easy to be lost; a limiting structure is adopted, which does not require alignment and is less difficult to operate than a positioning structure; it has a stop structure, and the stop structure keeps the limit pin in the second working position.

[0088] Example 3

[0089] See also Figures 9 to 13 The pipe bender's runner groove spacing adjustment structure of the third embodiment of the present invention comprises:

[0090] Base 1;

[0091] There are two crossbeams 2 and they are symmetrically arranged on the left and right sides of the base 1 with the base 1 as the center;

[0092] There are two runner assemblies 4, which are respectively arranged on the two crossbeams 2 and include runners, each having a plurality of pipe grooves of different diameters;

[0093] The two crossbeams 2 are both swingably connected to the machine base 1, and the two crossbeams 2 are switched between various working positions by swinging;

[0094] Two working limit structures are formed on the machine base 1 so that the crossbeam 2 can be kept at various working positions when bending the pipe.

[0095] See also Figure 9 and Figure 10 In this embodiment, the working limit structure includes a first working limit portion formed in the left and right directions on the machine base 1. When the beam 2 is located at the first working position, the beam 2 abuts against the first working limit portion when bending the pipe.

[0096] In this embodiment, the rotation center of the beam 2 is located in the middle thereof, and the machine base 1 includes a base 11 in the central direction, and left and right mounting parts 12 extending from the front end of the base 11 to the left and right directions. Both mounting parts 12 include a mounting groove 13, and the mounting groove 13 includes a bottom wall 131 and a lateral side wall 132. The lateral side wall 132 is located behind the beam 2 and forms the first working limit portion.

[0097] See also Figure 13In this embodiment, the wheel tube groove spacing adjustment structure of the pipe bending machine also includes a swinging assembly 3, the swinging assembly 3 includes a swinging shaft 32 and a locking screw 33, a countersunk hole is provided on the crossbeam 2, and a locking threaded hole is provided on the swinging shaft 32. The locking screw 33 passes through the countersunk hole and is screwed into the locking threaded hole. A swinging hole 14 adapted to the swinging shaft 32 is provided on the machine base 1, and the swinging shaft 32 is located in the swinging hole 14. The swinging shaft 32 has a circumferential annular groove. The wheel tube groove spacing adjustment structure of the pipe bending machine also includes an anti-slip screw 34, an anti-slip threaded hole is provided on the machine base 1, and the anti-slip screw 34 is screwed into the anti-slip threaded hole, and the inner end of the anti-slip screw 34 is located in the annular groove.

[0098] See also Figure 11 and Figure 12 In this embodiment, the working limit structure also includes a receiving hole opened in the machine base 1, a force block 56 movably arranged in the receiving hole, an elastic member 52 that allows the force block 56 to extend out of the receiving hole, and an operating member 53 fixedly connected to the force block 56.

[0099] In this embodiment, the two mounting grooves 13 are connected. There is one force block 56, and when bending the pipe, both crossbeams 2 abut against the same force block 56. The force block 56 is in the shape of an isosceles trapezoid, and its force-bearing portion is the waist of the isosceles trapezoid. When only one force block 56 is provided, and the same force block 56 bears the force from the two crossbeams 2, the force transmitted to the base 1 via the crossbeam 2 is only along the rear direction of the base 1, thereby increasing the service life of the base 1. In other embodiments, the force block 56 may also be in other shapes such as an isosceles triangle, as long as it has two symmetrical force-bearing portions.

[0100] In this embodiment, the pipe bender's runner tube groove spacing adjustment structure further includes a stop structure comprising a stop member 55 movably connected to the operating member 53. When the stop member 55 directly or indirectly abuts the machine base 1 under the action of the elastic member 52, the force block 56 is fixed. The operating member 53 is provided with a fixing pin, and the force block 56 defines a force groove, in which the fixing pin is movably located.

[0101] In this embodiment, the force bearing groove is concave. When the force bearing block 56 needs to be raised or lowered, the stopper 55 is translated so that the fixing pins are switched at both ends of the concave force bearing groove. In other embodiments, the stopper 55 can be connected to the operating member 53 by a pivot.

[0102] The beneficial effects of the wheel pipe groove spacing adjustment structure of the pipe bending machine of the third embodiment of the present invention are: dividing a beam 2 in the prior art into two, and making the left and right beams 2 swingably connected to the machine base 1, the two beams 2 realize the position adjustment of the wheel assembly 4 by swinging (also changing the distance between the pipe grooves of the two wheels required for bending pipes of different diameters), which is different from the sliding adjustment method and is more convenient to operate; when storing, only the beam 2 needs to be rotated, which is easy to operate and the beam 2 is not easy to be lost; a limiting structure is adopted, which does not require alignment and has low operation difficulty compared to the positioning structure; the two mounting grooves 13 of the machine base 1 are connected, and only one force block 56 is needed, and the force block 56 is symmetrically stressed on both sides, and the force transmitted to the machine base 1 through the force block 56 is only in the backward direction, and the machine base 1 is not easily damaged (the machine base 1 is usually made of aluminum and the beam 2 is made of steel); it has a stop structure, and the stop structure enables the position of the operating member 53 to be maintained in both states.

[0103] Example 4

[0104] See also Figures 14 to 17 The fourth embodiment of the present invention provides a pipe bender's runner groove spacing adjustment structure, which includes:

[0105] Base 1;

[0106] There are two crossbeams 2 and they are symmetrically arranged on the left and right sides of the base 1 with the base 1 as the center;

[0107] There are two runner assemblies 4, which are respectively arranged on the two crossbeams 2 and include runners, each having a plurality of pipe grooves of different diameters;

[0108] The two crossbeams 2 are both swingably connected to the machine base 1, and the two crossbeams 2 are switched between various working positions by swinging;

[0109] Two working limit structures are formed on the machine base 1 so that the crossbeam 2 can be kept at various working positions when bending the pipe.

[0110] The difference between this embodiment and the third embodiment lies in the shape of the crossbeam 2 and the swing structure between the crossbeam 2 and the machine base 1 .

[0111] See also Figure 14 and Figure 15 In this embodiment, the working limit structure includes a first working limit portion formed in the left and right directions on the machine base 1. When the beam 2 is located at the first working position, the beam 2 abuts against the first working limit portion when bending the pipe.

[0112] In this embodiment, the rotation center of the beam 2 is located in the middle thereof, and the machine base 1 includes a base 11 in the central direction, and left and right mounting parts 12 extending from the front end of the base 11 to the left and right directions. Both mounting parts 12 include a mounting groove 13, and the mounting groove 13 includes a bottom wall 131 and a lateral side wall 132. The lateral side wall 132 is located behind the beam 2 and forms the first working limit portion.

[0113] See also Figure 17 In this embodiment, the pipe bender's runner tube groove spacing adjustment structure further includes a swing assembly 3, which includes a swing screw 31. The crossbeam 2 is flat, and the base 1 has a U-shaped portion at its front end, which forms the mounting slot 13. The crossbeam 2 is located within the U-shaped portion of the base 1. The lower parallel wall of the U-shaped portion of the crossbeam 2 defines a light hole, and the upper parallel wall of the U-shaped portion of the crossbeam 2 defines a threaded hole. The swing screw 31 is installed from bottom to top, and has a clearance fit with the base 1.

[0114] In this embodiment, the working limit structure further includes a longitudinal receiving hole provided in the base 1, a force block 56 movable in the receiving hole, an elastic member 52 for making the force block 56 extend out of the receiving hole, and an operating member 53 fixedly connected to the force block 56. Figure 11 、 Figure 12 and Figure 16 .

[0115] In this embodiment, the two mounting grooves 13 are connected. There is one force-bearing block 56 , and both crossbeams 2 abut against the same force-bearing block 56 when bending the pipe.

[0116] In this embodiment, the pipe bending machine's runner groove spacing adjustment structure also includes a stop structure, which is the same as that in the third embodiment. Figure 11 、 Figure 12 and Figure 16 .

[0117] The beneficial effects of the wheel pipe groove spacing adjustment structure of the pipe bending machine of the fourth embodiment of the present invention are as follows: a beam 2 in the prior art is divided into two, and the left and right beams 2 are swingably connected to the machine base 1. The two beams 2 realize the position adjustment of the wheel assembly 4 by swinging (also changing the distance between the pipe grooves of the two wheels required for bending pipes of different diameters). Unlike the sliding adjustment method, the operation is more convenient; when storing, only the beam 2 needs to be rotated, which is easy to operate and the beam 2 is not easy to be lost; the limiting structure is adopted, and compared with the positioning structure, there is no need for alignment, and the operation difficulty is low; the two mounting grooves 13 of the machine base 1 are connected, and only one force block 56 is required, and the force block 56 is symmetrically stressed on both sides. The force transmitted to the machine base 1 through the force block 56 is only in the backward direction, and the machine base 1 is not easily damaged; it has a stop structure, and the stop structure enables the position of the operating member 53 to be maintained in both states; only the swing screw 31 is needed to achieve the rotation connection between the beam 2 and the machine base 1.

[0118] Example 5

[0119] The difference between the fourth embodiment and the other fourth embodiments mainly lies in the position maintaining structure of the crossbeam 2.

[0120] See also Figure 18 and Figure 19 In this embodiment, the position maintaining structure of the crossbeam 2 is a working limit structure, which includes a receiving hole opened on the machine base 1, a lifting component movably arranged in the receiving hole, and an elastic member 57 arranged on the lifting component. The lower end of the machine base 1 is provided with a tapered hole that is larger at the bottom and smaller at the top. When bending the pipe, the lifting component extends out of the receiving hole under human action, and the elastic deformation of the elastic member 57 keeps the lifting component in the force-bearing position.

[0121] In this embodiment, the lifting assembly includes a force-bearing block 56 and an operating member 53 . The operating member 53 is threadedly connected to the force-bearing block 56 , and the force-bearing block 56 is in an inverted T-shape.

[0122] The working limit structure of this embodiment has fewer parts.

[0123] In other embodiments, the position maintaining structure of the crossbeam 2 may also be a working positioning structure. In this case, there are two sets of lifting components, and positioning holes 15 are provided on both crossbeams 2 .

[0124] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art will understand that the present invention includes, but is not limited to, the contents described in the above specific embodiments. Any modifications that do not deviate from the functional and structural principles of the present invention are intended to be included within the scope of the claims.

Claims

1. The pipe bending machine's runner groove spacing adjustment structure is characterized by: The pipe bender's runner groove spacing adjustment structure includes: Machine base (1); There are two cross beams (2) which are symmetrically arranged on the left and right sides of the machine base (1) with the machine base (1) as the center; There are two groups of runner assemblies (4) which are respectively arranged on the two crossbeams (2), and include a runner having a plurality of pipe grooves with different pipe diameters; Wherein, the two crossbeams (2) are both connected to the machine base (1) in a swinging manner, and the two crossbeams (2) are switched between various working positions by swinging; Wherein, a plurality of working limit structures and / or working positioning structures are formed on the machine base (1), so that the crossbeam (2) is maintained at various working positions when bending the pipe.

2. The pipe bender runner groove spacing adjustment structure according to claim 1, characterized in that: The working limit structure and / or working positioning structure comprises a liftable force-bearing component mounted on the machine base (1), and the force-bearing component moves in and out of the swing path of the crossbeam (2) by being lifted or lowered.

3. The pipe bender runner groove spacing adjustment structure according to claim 2, characterized in that: A working positioning structure is formed on the machine base (1), and the working positioning structure includes a lifting hole (16) provided on the crossbeam (2), a positioning pin (51) movably provided in the lifting hole (16), a working positioning hole (15) provided on the machine base (1), an elastic member (52) for moving the positioning pin (51) toward the working positioning hole (15), and an operating member (53) fixedly connected to the positioning pin (51), and in a working state, the positioning pin (51) is located in the working positioning hole (15); or, The working limit structure and / or working positioning structure comprises a receiving hole provided on the machine base (1), a lifting assembly movably provided in the receiving hole, and an elastic member (57) provided on the lifting assembly. The lifting assembly comprises a force-bearing member and an operating member (53). A tapered hole with a larger bottom and a smaller top is provided at the lower end of the machine base (1). When bending a pipe, the lifting assembly extends out of the receiving hole under human action, and the lifting assembly is maintained in a force-bearing position through the elastic deformation of the elastic member (57).

4. The pipe bender runner groove spacing adjustment structure according to claim 1, characterized in that: A working limit structure is formed on the machine base (1), and the working limit structure includes a first working limit portion formed in the left and right directions on the machine base (1); when the crossbeam (2) is located at the first working position, the crossbeam (2) abuts against the first working limit portion when bending the pipe; The swing center of the crossbeam (2) is located at its end close to one end of the machine base (1). The machine base (1) includes a base (11) in the central direction and left and right mounting parts (12) extending from the base (11) to the left and right directions. Both mounting parts (12) have a mounting groove (13). The mounting groove (13) has a bottom wall (131) and a transverse side wall (132). The transverse side wall (132) is located in front of the crossbeam (2) and forms the first working limit part. One end of the crossbeam (2) is located in the mounting groove (13).

5. The pipe bender runner groove spacing adjustment structure according to claim 4, characterized in that: The working limit structure also includes a lifting hole (16) opened on the machine base (1), a limit pin (58) arranged in the lifting hole (16), an elastic member (52) for making the limit pin (58) extend out of the lifting hole (16), and an operating member (53) fixedly connected to the limit pin (58); a convex portion (22) is formed at one end of the beam (2) close to the machine base (1); in the working state, the limit pin (58) extends out of the lifting hole (16) and abuts against the convex portion (22) of the beam (2); and the limit pin (58) forms a second working limit portion.

6. The pipe bender runner groove spacing adjustment structure according to claim 5, characterized in that: The rotating wheel pipe groove spacing adjustment structure of the pipe bending machine also includes a stopping structure, which includes a stopping groove (581) opened on the limiting pin (58) and a stopping member (55) provided on the machine base (1). The limiting pin (58) is rotatably connected to the machine base (1). The stopping groove (581) includes a vertical section at the bottom and a horizontal section at the top that are connected. The stopping member (55) is located in the stopping groove (581). When the stopping member (55) is located in the horizontal section of the stopping groove (581), the elastic member (52) is compressed, and the upper end of the limiting pin (58) does not extend out of the lifting hole (16). When the stopping member (55) is located in the vertical section of the stopping groove (581), the upper end of the limiting pin (58) extends out of the lifting hole (16) under the action of the elastic member (52).

7. The pipe bender runner groove spacing adjustment structure according to claim 5 or 6, characterized in that: The elastic member (52) is a spring sheet, one end of which is fixed on the crossbeam (2) and the other end is fixed on the limiting pin (58); or, The elastic member (52) is a compression spring. A spring seat (54) is provided on the machine base (1). The compression spring is sleeved outside the limit pin (58). The lower end of the compression spring abuts against the spring seat (54), and the upper end abuts against the limit pin (58). The lower end of the operating member (53) is exposed outside the spring seat (54).

8. The pipe bender runner groove spacing adjustment structure according to claim 1, characterized in that: A working limit structure is formed on the machine base (1), and the working limit structure includes a first working limit portion formed in the left and right directions on the machine base (1); when the crossbeam (2) is located at the first working position, the crossbeam (2) abuts against the first working limit portion when bending the pipe; The rotation center of the crossbeam (2) is located in the middle thereof. The machine base (1) includes a base (11) in the central direction and left and right mounting portions (12) extending from the front end of the base (11) in the left and right directions. Both mounting portions (12) include a bottom wall (131) and a transverse side wall (132). The transverse side wall (132) is located behind the crossbeam (2) and forms the first working limit portion.

9. The pipe bender runner groove spacing adjustment structure according to claim 8, characterized in that: The working limit structure further includes a receiving hole provided in the machine base (1), a force-bearing block (56) movably arranged in the receiving hole, an elastic member (52) for causing the force-bearing block (56) to extend out of the receiving hole, and an operating member (53) fixedly connected to the force-bearing block (56); The pipe bending machine's wheel pipe groove spacing adjustment structure further includes a stop structure, the stop structure including a stop member (55) movably connected to the operating member (53), when the stop member (55) directly or indirectly abuts against the machine base (1) under the action of the elastic member (52), the force block (56) is fixed; There is one stress-bearing block (56), and when the pipe is bent, both crossbeams (2) abut against the same stress-bearing block (56), or there are two stress-bearing blocks (56).

10. The pipe bender runner groove spacing adjustment structure according to claim 1, characterized in that: The wheel tube groove spacing adjustment structure of the pipe bending machine also includes a swing assembly (3), the swing assembly (3) includes a swing shaft (32), a locking screw (33) and an anti-slip screw (34), the locking screw (33) locks the swing shaft (32) and the crossbeam (2), the machine base (1) is provided with a swing hole (14) adapted to the swing shaft (32), the swing shaft (32) is located in the swing hole (14), the swing shaft (32) is provided with a circumferential ring groove, the machine base (1) is provided with an anti-slip threaded hole, the anti-slip screw (34) is screwed into the anti-slip threaded hole, and the inner end of the anti-slip screw (34) is located in the ring groove; or, The crossbeam (2) includes a U-shaped portion, and the machine base (1) has an insertion portion in the left and right directions. The opening of the U-shaped portion is horizontal and is sleeved on the insertion portion. The crossbeam (2) and the machine base (1) are rotatably connected by a swing screw (31) vertically installed on the U-shaped portion and the insertion portion. The swing screw (31) is threadedly connected to the U-shaped portion, and the swing screw (31) is clearance-matched with the machine base (1).

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