Pipe bending tool with adjustable radius

Abstract

The radius-adjustable pipe bending tool comprises a base, a circular truncated cone and a shaping mechanism, the circular truncated cone is fixedly arranged on the upper end face of the base, and a shaft hole is formed in the middle of the circular truncated cone; the vertical rod is connected to the lower end face of the other end of the transverse rod, and the handle is arranged on the outer side of the lower end of the vertical rod. And the U-shaped roller moves in the length direction of the cross rod and the height direction of the vertical rod through the adjusting assembly. When a pipe needs to be bent, according to the radius of the pipe needing to be bent, the height of the U-shaped rolling wheel is adjusted to the target position through the shaping mechanism, then one end of the pipe is limited through the limiting piece, the horizontal position of the U-shaped rolling wheel is adjusted, the U-shaped rolling wheel is meshed with the pipe and attached to the circular truncated cone, and at the moment, the pipe bending operation of the target radius can be achieved by rotating the handle. The device can realize the adjustment of any radius from the minimum radius to the maximum radius of the circular truncated cone, and the application scene is wider.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe bending equipment, in particular to a pipe bending tool with adjustable radius. Background Art

[0002] In the field of pipeline installation and processing, pipe bender is an important tool and is widely used in various pipe bending operations. Currently, pipe benders on the market are mainly divided into two categories: one is the pipe bender with non-selectable bending radius, and the other is the pipe bender with adjustable bending radius.

[0003] For pipe benders with selectable bending radius, the design principle is typically to pre-set an arc groove with a fixed radius in the pipe clamping portion of the pipe bender. For example, a manual pipe bender with patent number 201610280776.2, published in China, features three arc grooves with different radii, arranged in a sequence from top to bottom, on the outer surface of a semi-open pipe clamp. While this design provides a certain degree of flexibility in the selection of bending radiuses, because the radius of the arc groove is fixed and predetermined by the designer, the pipe bender is only capable of bending pipes of three specific radii and cannot meet the user's needs for bending pipes of any radius.

[0004] This limitation has brought many inconveniences in practical applications. On the one hand, it limits the application range of pipe benders, forcing users to change pipe benders when performing pipe bending operations with different radii. On the other hand, for applications where precise control of the bending radius is required, such fixed-radius pipe benders often cannot meet the accuracy requirements, thus affecting the overall performance and safety of the piping system. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a pipe bending tool with adjustable radius to overcome the deficiencies in the above-mentioned prior art.

[0006] The technical solution of the utility model for solving the above-mentioned technical problems is as follows: a radius-adjustable pipe bending tool comprises a base, a frustum and a shaping mechanism, the frustum is fixedly arranged on the upper end surface of the base, and an axial hole is arranged in the middle of the frustum; the shaping mechanism comprises a rotating shaft, a horizontal bar, a vertical bar, a handle, a U-shaped roller and an adjusting assembly, one end of the rotating shaft is connected to the lower end surface of one end of the horizontal bar, and the other end is rotatably arranged in the axial hole, the vertical bar is connected to the lower end surface of the other end of the horizontal bar, and the handle is arranged on the outer side of the lower end of the vertical bar; the U-shaped roller moves along the length direction of the horizontal bar and the height direction of the vertical bar through the adjusting assembly, and a limiting member for limiting one end of the pipe is provided on the base.

[0007] The beneficial effects of the present invention are: since the cross-sectional radii of the truncated cone are different at different heights, the height and position of the U-shaped roller on the horizontal plane are adjusted by the shaping mechanism so that the rotation radius of the U-shaped roller is consistent with the cross-sectional radius of the current height of the truncated cone; in specific operation, when it is necessary to bend a pipe, according to the radius of the pipe to be bent, the height of the U-shaped roller is adjusted to the target position by the shaping mechanism, and then one end of the pipe is limited by a limit piece, and then the horizontal position of the U-shaped roller is adjusted so that the U-shaped roller bites the pipe and fits the truncated cone. At this time, the pipe bending operation of the target radius can be achieved by turning the handle. The device can achieve the adjustment of any radius between the minimum radius and the maximum radius of the truncated cone, and has a wider range of application scenarios.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, the adjustment assembly includes a movable tube, a first bolt, and a second bolt. A slide groove is provided through the middle of the vertical rod, one end of the movable tube extends into the slide groove, a first threaded hole is provided on the top of the horizontal rod, one end of the first bolt extends into the slide groove through the first threaded hole, and is rotatably connected to the upper end surface of the movable tube;

[0010] One end of the roller seat of the U-shaped roller is movably extended into one end of the movable tube, and a second threaded hole is provided at the end of the roller seat close to the movable tube. A through hole is provided at the end of the movable tube away from the U-shaped roller. The second bolt is a semi-threaded bolt. The second bolt passes through the other end of the movable tube and is threadedly connected to the second threaded hole. The light rod part of the second bolt is located in the through hole, and a limiting ring is provided on the fixed sleeve of the light rod part of the second bolt, and the limiting ring is located inside the movable tube.

[0011] Furthermore, limiting grooves are symmetrically provided on both side walls of the slide, and limiting blocks matching the limiting grooves are provided on both sides of the movable tube, and the limiting blocks move in the limiting grooves.

[0012] Furthermore, a scale line is provided on the vertical rod, and a pointer is provided on the movable tube, and the pointer points to the scale line.

[0013] Furthermore, the diameter of the upper edge of the U-shaped roller is greater than the diameter of the lower edge.

[0014] Furthermore, a plurality of positioning holes are provided on the base.

[0015] Furthermore, the limiting member is a U-shaped structure that is tilted, and the tilt angle of the limiting member is consistent with the tilt angle of the generatrix of the frustum. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the partial cross-sectional structure of the utility model before the pipe is bent;

[0019] Figure 4 This is a schematic diagram of the partial cross-sectional structure of the utility model after the pipe is bent;

[0020] Figure 5 It is a side view of the utility model;

[0021] Figure 6 It is a schematic diagram of the cross-sectional structure of the utility model;

[0022] Figure 7 For the utility model Figure 6 A magnified view of the structure at center A.

[0023] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0024] 1. Base; 11. Positioning hole; 2. Cone; 21. Axis hole; 3. Shaping mechanism; 31. Rotating shaft; 32. Cross bar; 321. First threaded hole; 33. Vertical bar; 331. Slide groove; 3311. Limiting groove; 332. Scale line; 34. Handle; 35. U-shaped roller; 36. Adjustment assembly; 361. Movable tube; 3611. Through hole; 3612. Limiting block; 362. First bolt; 363. Second bolt; 3631. Limiting ring; 364. Pointer; 37. Roller seat; 371. Second threaded hole; 4. Limiting piece. DETAILED DESCRIPTION

[0025] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0026] like Figures 1 to 7 As shown, Example 1, a radius-adjustable pipe bending tool, includes a base 1, a frustum 2 and a shaping mechanism 3, the frustum 2 is fixedly arranged on the upper end surface of the base 1, and an axial hole 21 is provided in the middle of the frustum 2; the shaping mechanism 3 includes a rotating shaft 31, a horizontal bar 32, a vertical bar 33, a handle 34, a U-shaped roller 35 and an adjusting assembly 36, one end of the rotating shaft 31 is connected to the lower end surface of one end of the horizontal bar 32, and the other end is rotatably arranged in the axial hole 21, the vertical bar 33 is connected to the lower end surface of the other end of the horizontal bar 32, and the handle 34 is arranged on the outer side of the lower end of the vertical bar 33; the U-shaped roller 35 moves along the length direction of the horizontal bar 32 and the height direction of the vertical bar 33 through the adjusting assembly 36, and a limiting member 4 for limiting one end of the pipe is provided on the base 1.

[0027] Since the cross-sectional radius of the truncated table 2 at different heights is different, the height and horizontal position of the U-shaped roller 35 are adjusted by the shaping mechanism 3 so that the rotation radius of the U-shaped roller 35 is consistent with the cross-sectional radius of the truncated table 2 at the current height;

[0028] The specific operation is that when bending a pipe is required, the height of the U-shaped roller 35 is adjusted to the target position through the shaping mechanism 3 according to the required radius of the bent pipe, and then one end of the pipe is limited by the limiter 4, and then the horizontal position of the U-shaped roller 35 is adjusted so that the U-shaped roller 35 bites the pipe and fits the frustum. At this time, the handle 34 is turned to achieve the bending operation of the target radius. The device can achieve the adjustment of any radius between the minimum radius and the maximum radius of the frustum, and has a wider range of application scenarios.

[0029] In a specific implementation, the cross-sections of the rotating shaft 31 and the shaft hole 21 can be mutually adapted inverted T-shaped structures, such as Figure 6 As shown, the rotating shaft 31 is arranged in this way so as not to separate from the truncated table 2 .

[0030] Example 2: This example is a further improvement on Example 1, and its details are as follows:

[0031] The adjustment assembly 36 includes a movable tube 361, a first bolt 362, and a second bolt 363. A slot 331 is formed through the middle of the vertical rod 33. One end of the movable tube 361 extends into the slot 331. A first threaded hole 321 is provided at the top of the crossbar 32. One end of the first bolt 362 extends through the first threaded hole 321 into the slot 331 and is rotatably connected to the upper end surface of the movable tube 361. In a specific embodiment, the upper end surface of the movable tube 361 and the lower end cross-section of the first bolt 362 adopt a mutually compatible inverted T-shaped structure. In this manner, the first bolt 362 will not be separated from the movable tube 361.

[0032] One end of the roller seat 37 of the U-shaped roller 35 is movably extended into one end of the movable tube 361. A second threaded hole 371 is provided at the end of the roller seat 37 close to the movable tube 361. A through hole 3611 is provided at the end of the movable tube 361 away from the U-shaped roller 35. The second bolt 363 is a semi-threaded bolt. The second bolt 363 passes through the other end of the movable tube 361 and is threadedly connected to the second threaded hole 371. The smooth rod part of the second bolt 363 is located in the through hole 3611. The smooth rod part of the second bolt 363 is fixed with a limiting ring 3631, and the limiting ring 3631 is located inside the movable tube 361.

[0033] When adjustment is required, it is only necessary to adjust the first bolt 362 and the second bolt 363 to adjust the U-shaped roller 35 in the vertical and horizontal directions, thereby achieving the purpose of adjusting the radius of the bend. The structure is simple and easy to operate.

[0034] Example 3: This example is a further improvement on Example 2, and its details are as follows:

[0035] The two side walls of the chute 331 are symmetrically provided with limiting grooves 3311. Limiting blocks 3612 are provided on both sides of the movable tube 361 to match the limiting grooves 3311. The limiting blocks 3612 move within the limiting grooves 3311. The cooperation between the limiting blocks 3612 and the limiting grooves 3311 prevents the second bolt 363 from bending under stress during the tube bending process.

[0036] Example 4: This example is a further improvement on Example 3, and its details are as follows:

[0037] A scale line 332 is provided on the vertical rod 33, and a pointer 364 is provided on the movable tube 361. The pointer 364 points to the scale line 332. The scale value of the scale line 332 is the radius, and the radius pointed to by the scale value corresponds to the cross-sectional radius of the frustum 2 at the height of the U-shaped roller 35 at that time. Therefore, the height of the U-shaped roller 35 can be adjusted according to the scale value to achieve the target bend radius.

[0038] Example 5: This example is a further improvement on Example 1, and its details are as follows:

[0039] The base 1 is provided with a plurality of positioning holes 11. The base 1 can be fixed to the machine tool through the positioning holes 11 and bolts.

[0040] Example 6: This example is a further improvement on Example 1, and its details are as follows:

[0041] The diameter of the upper edge of the U-shaped roller 35 is greater than the diameter of the lower edge, so that the pipeline can be well fastened and the pipeline will not fall off the U-shaped roller 35 during the pipe bending process.

[0042] Example 7: This example is a further improvement on Example 1, and its details are as follows:

[0043] The stopper 4 is a U-shaped structure with an inclined angle, and the inclination angle of the stopper 4 is consistent with the inclination angle of the generatrix of the truncated table 2. The U-shaped stopper 4 has a simple structure, and when used, only one end of the pipe to be bent needs to be placed in the U-shaped structure.

[0044] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A radius-adjustable pipe bending tool, characterized in that: The invention comprises a base (1), a round table (2) and a shaping mechanism (3), wherein the round table (2) is fixedly arranged on the upper end surface of the base (1), and an axis hole (21) is arranged in the middle of the round table (2); the shaping mechanism (3) comprises a rotating shaft (31), a cross bar (32), a vertical bar (33), a handle (34), a U-shaped roller (35) and an adjustment component (36), and one end of the rotating shaft (31) is connected to the lower end of one end of the cross bar (32). The vertical rod (33) is connected to the lower end surface of the other end of the horizontal rod (32), and the handle (34) is arranged on the outer side of the lower end of the vertical rod (33); the U-shaped roller (35) moves along the length direction of the horizontal rod (32) and the height direction of the vertical rod (33) through the adjustment component (36), and a limiting member (4) for limiting one end of the pipeline is provided on the base (1).

2. The pipe bending tool according to claim 1, characterized in that The adjustment assembly (36) includes a movable tube (361), a first bolt (362) and a second bolt (363); a sliding groove (331) is provided through the middle of the vertical rod (33); one end of the movable tube (361) extends into the sliding groove (331); a first threaded hole (321) is provided on the top of the cross rod (32); one end of the first bolt (362) extends into the sliding groove (331) through the first threaded hole (321) and is rotatably connected to the upper end surface of the movable tube (361); One end of the roller seat (37) of the U-shaped roller (35) is movably extended into one end of the movable tube (361); a second threaded hole (371) is provided at one end of the roller seat (37) close to the movable tube (361); a through hole (3611) is provided at one end of the movable tube (361) away from the U-shaped roller (35); the second bolt (363) is a semi-threaded bolt; the second bolt (363) passes through the other end of the movable tube (361) and is threadedly connected to the second threaded hole (371); the light rod portion of the second bolt (363) is located in the through hole (3611); the light rod portion of the second bolt (363) is fixedly sleeved with a limiting ring (3631); and the limiting ring (3631) is located inside the movable tube (361).

3. The pipe bending tool according to claim 2, characterized in that The two side walls of the slide groove (331) are symmetrically provided with limiting grooves (3311), and limiting blocks (3612) matching the limiting grooves (3311) are provided on both sides of the movable tube (361), and the limiting blocks (3612) move in the limiting grooves (3311).

4. The pipe bending tool according to claim 3, characterized in that A scale line (332) is provided on the vertical rod (33), and a pointer (364) is provided on the movable tube (361), and the pointer (364) points to the scale line (332).

5. The pipe bending tool according to claim 1, characterized in that The diameter of the upper edge of the U-shaped roller (35) is larger than the diameter of the lower edge.

6. The pipe bending tool according to claim 1, characterized in that A plurality of positioning holes (11) are provided on the base (1).

7. The pipe bending tool according to claim 1, characterized in that The limiting member (4) is a U-shaped structure arranged at an angle, and the inclination angle of the limiting member (4) is consistent with the inclination angle of the generatrix of the truncated table (2).

Images