CN111530998A

CN111530998A - Small metal pipe bending device

Info

Publication number: CN111530998A
Application number: CN202010415703.6A
Authority: CN
Inventors: 王宁; 于兴军
Original assignee: Shandong Yanhuang Industrial Design Co ltd
Current assignee: JINGDA (JINGZHOU) AUTOMOTIVE CO.,LTD.
Priority date: 2020-02-24
Filing date: 2020-02-24
Publication date: 2020-08-14
Anticipated expiration: 2040-02-24
Also published as: CN110947808A; CN111530998B; CN110947808B

Abstract

The invention provides a small metal pipe bending device which comprises a rack, wherein a fixed end clamping part and a first mandrel are arranged on the rack, and a roller is arranged on the first mandrel; the first mandrel is also rotatably provided with a first gear, the first gear is fixedly provided with a third clamping device, the rack is also rotatably provided with a first rotating shaft, the first rotating shaft is fixedly provided with a second gear and a ratchet wheel, the second gear is meshed with the first gear, and the ratchet wheel is connected with a ratchet wheel driving mechanism; the ratchet wheel driving mechanism comprises a driving swing rod, the middle part of the driving swing rod is hinged to the rack, one end of the driving swing rod is hinged to a first connecting rod, the first connecting rod is hinged to a driven swing rod, and one end of the driven swing rod is rotatably arranged on a first rotating shaft; a driving pawl is arranged on the driven oscillating bar, and a non-return pawl is arranged on the rack. The invention realizes the semi-mechanization of metal pipe bending, can adapt to various working environments, meets various bending angles, and has the advantages of simple and portable integral structure, convenient carrying and low failure rate.

Description

Small metal pipe bending device

The invention relates to a small metal pipe bending device and a use method thereof, which are filed for divisional application of invention patent with application number of 2020101104639.

Technical Field

The invention belongs to the technical field of metal pipe bending, and particularly relates to a small metal pipe bending device.

Background

With the rapid development of the communication industry in the last twenty years, the application of the cable has a remarkable development speed. In the laying process of the existing cable, even though the cable trench and the like are generally adopted for protecting the cable in the existing underground construction, the protective steel pipe is still required to be arranged outside the cable to play the protective roles of pressure resistance, corrosion resistance and the like in specific occasions.

At present, in the cable laying process, due to the influence of factors such as process requirements or special construction section limitations, the bending angle of a corner metal pipe with a standard size is limited, and the use requirement is difficult to meet. The prior art adopts artifical pure manual to relapse, bend many times spare tubular metal resonator, and the artifical buckle that exists buckle the shortcoming that the bending is not standard, intensity of labour is big, inefficiency, can't satisfy the construction needs, and easily causes the deformation of tubular metal resonator must be through reshaping just can be connected smoothly with other pipelines, wastes time and energy, and the inefficiency of bending influences the construction progress.

Disclosure of Invention

Aiming at the problems of irregular bending, high labor intensity, low efficiency, incapability of meeting construction requirements and the like of manual bending of a metal pipe in the cable laying process, the invention provides the small metal pipe bending device and the use method thereof, which can easily realize metal pipe bending, reduce the labor intensity of operators, and have the advantages of easy carrying of equipment, low cost and convenient operation.

In order to achieve the purpose, the invention adopts the technical scheme that:

the invention provides a small metal pipe bending device which comprises a rack, wherein a fixed end clamping part and a first mandrel are arranged on the rack, and a roller is arranged on the first mandrel; the first mandrel is further rotatably provided with a first gear, the first gear is fixedly provided with a third clamping device, the rack is further rotatably provided with a first rotating shaft, the first rotating shaft is fixedly provided with a second gear and a ratchet wheel, the second gear is meshed with the first gear, and the ratchet wheel is connected with a ratchet wheel driving mechanism;

the ratchet wheel driving mechanism comprises a driving oscillating bar, the middle part of the driving oscillating bar is hinged to the rack, one end of the driving oscillating bar is hinged to a first connecting rod, the first connecting rod is hinged to a driven oscillating bar, and one end of the driven oscillating bar is rotatably arranged on the first rotating shaft; a driving pawl is arranged on the driven oscillating bar, and a non-return pawl is arranged on the rack;

the roller is detachably arranged on the first mandrel;

the third clamping device comprises an arc-shaped pressing part which is arranged on the first gear in a sliding mode, and the pressing part is connected with a spiral clamping driving mechanism.

Furthermore, an angle ruler is arranged on the rack, and a ruler rod is rotatably arranged on the first mandrel.

Furthermore, the first rotating shaft comprises a gear shaft which is rotatably arranged on the rack and a ratchet shaft which is slidably arranged on the rack, a second gear and a first connecting shaft sleeve are arranged on the gear shaft, a second connecting shaft sleeve which is matched with the first connecting shaft sleeve is arranged on the ratchet shaft, a ratchet wheel is fixedly arranged in the middle of the second connecting shaft sleeve, and a support is rotatably connected to the lower end of the second connecting shaft sleeve;

the support is provided with a roller; the roller is connected with a sliding block, and the sliding block is provided with a stepped groove; the sliding block is connected with a second connecting rod, the second connecting rod is hinged with a rocker, the middle part of the rocker is hinged on the rack, and the other end of the rocker is connected with an elastic piece; the rack is provided with an electromagnet, the ruler rod is provided with an in-place switch, and the third clamping device is provided with a reset switch.

Further, the ladder groove includes the first ladder groove and the second ladder groove of intercommunication, first ladder groove is located second ladder groove top.

Furthermore, stiff end clamping part includes first clamping device and second clamping device, first clamping device and second clamping device all are provided with convex clamp block.

Compared with the prior art, the technical scheme of the invention at least has the following technical effects:

(1) the invention adopts the technical proposal that the middle part of a driving swing rod is hinged on a frame, the driving swing rod is hinged with a first connecting rod, the first connecting rod is hinged with a driven swing rod, the driven swing rod is rotatably arranged on a first rotating shaft, and the first rotating shaft is provided with a second gear and a ratchet wheel, the second gear is meshed with the first gear, thereby jointly forming a connecting rod gear combination labor-saving mechanism, shaking the driving swing rod to drive a driving pawl to drive the ratchet wheel to rotate, the ratchet wheel rotates to drive the second gear to rotate, and an operator only needs small force to repeatedly swing the driving swing rod to complete the bending of a metal pipe. The folding table can adapt to various working environments, meet various folding angles, and has the advantages of simple and portable integral structure, convenience in carrying and low failure rate.

(2) According to the technical scheme that the angle ruler is arranged on the rack, the angle ruler is provided with the arc-shaped groove, the ruler rod is rotatably arranged on the first mandrel, and the through groove is formed in the ruler rod, the ruler rod can be fixed at a set angle on the angle ruler through the rotation of the ruler rod and the fastening piece, so that the bending angle can be set in advance, and the bending precision is improved.

(3) The invention adopts the technical scheme that a rack is respectively provided with a gear shaft and a ratchet shaft; the upper end of the gear shaft is provided with a second gear, and the lower end of the gear shaft is provided with a first connecting shaft sleeve; the upper end of the ratchet shaft is provided with a second coupling sleeve, the middle part of the ratchet shaft is provided with a ratchet wheel, and the lower end of the ratchet shaft is connected with the bracket; the roller is arranged on the bracket; the roller is connected with the sliding block, the sliding block is provided with a step groove, and the sliding block is connected with a second connecting rod; the second connecting rod is hinged with a rocker; the rocker is connected with an elastic piece; the rack is provided with an electromagnet, the ruler rod is provided with an in-place switch, the third clamping device is provided with a reset switch, when a set angle is bent, the in-place switch controls the electromagnet to be powered off, the rocker swings rightwards to drive the sliding to move leftwards, so that the ratchet shaft moves downwards to be separated from the gear shaft, the second gear does not rotate any more even if an operator continues to swing the active swing rod, and the phenomenon that the bending angle is too large to cause waste, influence construction and the like due to misoperation is avoided.

Drawings

FIG. 1 is a schematic view of the overall structure of a small metal pipe bending apparatus according to the present invention;

FIG. 2 is a schematic view of a third clamping device according to the present invention;

FIG. 3 is a schematic view of the ratchet drive mechanism of the present invention;

FIG. 4 is a schematic view of a connection state of the first rotating shaft and the second rotating shaft according to the present invention;

FIG. 5 is a schematic structural view of the first and second shafts in a separated state according to the present invention;

illustration of the drawings:

1. a frame; 2. a fixed end clamping part; 21. a first clamping device; 22. a second clamping device; 3. a metal tube; 4. a first mandrel; 5. a roller; 6. a first gear; 61. a third clamping device; 611. a pressing part; 612. a screw clamping drive mechanism; 613. a protrusion; 7. a first rotating shaft; 71. a gear shaft; 72. a ratchet shaft; 73. a first connecting shaft sleeve; 74. a second coupling sleeve; 8. a second gear; 9. a ratchet wheel; 10. a ratchet drive mechanism; 101. an active swing link; 102. a first link; 103. a driven swing rod; 104. a drive pawl; 105. a non-return pawl; 11. an angle ruler; 12. a ruler rod; 13. a support; 131. a roller; 14. a slider; 141. a stepped groove; 1411. a first step groove; 1412. a second stepped groove; 15. a second link; 16. a rocker; 17. an elastic member; 18. an electromagnet; 19. a position switch.

Detailed Description

In order to make the technical means, objectives and functions of the present invention easy to understand, the present invention will be further described with reference to the following embodiments.

Example 1

As shown in fig. 1, the small metal pipe bending apparatus of the present invention includes: the steel pipe clamping device comprises a rack 1, wherein a fixed end clamping part 2 is fixedly arranged on the rack 1, the fixed end clamping part 2 comprises a first clamping device 21 and a second clamping device 22, and the first clamping device 21 and the second clamping device 22 are both provided with arc-shaped clamping blocks (not shown in the figure), so that the steel pipe can be clamped more firmly and is not easy to deform; the specific structure of the first clamping device 21 and the second clamping device 22 is suitable for realizing the clamping of the metal tube 3, and may be a spiral clamping mechanism, or other existing clamping technologies, which will not be described herein again.

A first mandrel 4 is fixedly arranged on the frame 1, rollers 5 are detachably arranged on the top of the first mandrel 4, and the rollers 5 with different sizes can be selectively installed according to the pipe diameter size, the bending radius and the like of the metal pipe; the first mandrel 4 is rotatably provided with a first gear 6, the first gear 6 is fixedly provided with a third clamping device 61, as shown in fig. 2, the third clamping device 61 includes an arc-shaped pressing part 611 slidably disposed on the first gear 6, the pressing part 611 is connected with a spiral clamping driving mechanism 612, and the spiral clamping driving mechanism 612 can drive the pressing part 611 to move so as to fixedly clamp the metal pipe 3 between the roller 5 and the pressing part 611.

A first rotating shaft 7 is further rotatably arranged on the rack 1, a second gear 8 and a ratchet wheel 9 are fixedly arranged on the first rotating shaft 7, and the second gear 8 is meshed with the first gear 6; the diameter of the first gear 6 is larger than the diameter of the second gear 8. Ratchet 9 rotates and can drive the coaxial rotation of second gear 8, and second gear 8 rotates and drives first gear 6 to rotate, and first gear 6 rotates and drives third clamping device 61 to rotate, thereby third clamping device 61 rotates and promotes tubular metal resonator 3 and near gyro wheel 5 realization is buckled.

The ratchet 9 is connected with a ratchet driving mechanism 10, as shown in fig. 3, the ratchet driving mechanism 10 includes a driving swing rod 101, a middle portion of the driving swing rod 101 is hinged to the frame 1, one end of the driving swing rod 101 is hinged to a first connecting rod 102, the first connecting rod 102 is hinged to a driven swing rod 103, and one end of the driven swing rod 103 is rotatably disposed on the first rotating shaft 7, so that the driven swing rod 103 can swing around the first rotating shaft 7; a driving pawl 104 is arranged on the driven swing rod 103, and a non-return pawl 105 is arranged on the rack 1.

Specifically, the driving swing link 101 of this embodiment is swung to drive the driving pawl 104 to drive the ratchet 9 to rotate, and the ratchet 9 rotates to drive the second gear 8 to rotate. The driving swing rod 101, the first connecting rod 102, the driven swing rod 103, the ratchet wheel 9, the second gear 8 and the first gear 6 of the embodiment jointly form a connecting rod gear combination labor-saving mechanism; the operator only needs very little strength to swing initiative pendulum rod 101 repeatedly, can accomplish bending of tubular metal resonator 3, has changed the state of the metal protection pipe of artifical bending type in the power cable construction, has realized the semi-mechanization that tubular metal resonator 3 buckled, has overcome the shortcoming that the bending type that artifical bending type exists is not standard, intensity of labour is big, inefficiency, can't satisfy the construction needs, can adapt to various operational environment, satisfies various angle degrees of bending, and its overall structure is simple, light, conveniently carries, the fault rate is low.

Further, the fixed angle ruler 11 that is provided with in frame 1, angle ruler 11 is provided with the arc wall, it is provided with chi pole 12 to rotate on the first mandrel 4, chi pole 12 can freely rotate around first mandrel 4, be provided with on the chi pole 12 with the arc wall assorted of angle ruler 11 lead to the groove, rotate chi pole 12, rethread fastener can with chi pole 12 is fixed set for angle department on the angle ruler 11, can set for in advance like this and bend the angle degree, improve the precision of bending.

Further, as shown in fig. 4, the first rotating shaft 7 includes a gear shaft 71 rotatably disposed on the frame 1 and a ratchet shaft 72 slidably disposed on the frame 1; the upper end of the gear shaft 71 is provided with a second gear 8, and the lower end is provided with a first connecting shaft sleeve 73; a second connecting shaft sleeve 74 matched with the first connecting shaft sleeve 73 is arranged at the upper end of the ratchet shaft 72, a ratchet 9 is fixedly arranged in the middle of the second connecting shaft sleeve, and a support 13 is rotatably connected at the lower end of the ratchet shaft 72; the first connecting shaft sleeve 73 and the second connecting shaft sleeve 74 are both provided with a convex structure; the bracket 13 is provided with a roller 131; a sliding block 14 is connected to the roller 131, the sliding block 14 is slidably disposed on the frame 1, the sliding block 14 is provided with a stepped groove 141, as shown in fig. 5, the stepped groove 141 includes a first stepped groove 1411 and a second stepped groove 1412 which are communicated, and the first stepped groove 1411 is located above the second stepped groove 1412; the drive pawl 104 and the check pawl 105 are always in contact with the ratchet wheel 9.

As shown in fig. 4, a second connecting rod 15 is connected to the sliding block 14; one end of the second connecting rod 15 is hinged with the sliding block 14, and the other end of the second connecting rod is hinged with a rocker 16; one end of the rocker 16 is hinged with the second connecting rod 15, the middle part of the rocker is fixedly hinged on the rack 1, and the other end of the rocker is connected with an elastic part 17; the other end of the elastic piece 17 is fixedly arranged on the frame 1; an electromagnet 18 is arranged on the rack 1, and an iron block matched with the electromagnet 18 is arranged on the rocker 16; as shown in fig. 1, the ruler rod 12 is provided with an in-place switch 19 matched with the electromagnet 18, and the third clamping device 61 is provided with a reset switch; as shown in fig. 2, the third clamping device 61 is provided with a projection 613 matched with the position switch 19.

Specifically, when the metal pipe 3 is bent to a set angle, the protrusion 613 of the third clamping device 61 touches the position switch 19, the electromagnet 18 is controlled to be powered off, as shown in fig. 5, then the rocker 16 swings to the right under the action of the elastic member 17 and the gravity of the ratchet 9, the bracket 13 and the like, so as to drive the slider 14 to move to the left, the roller 131 enters the second step groove 1412 from the first step groove 1411, the ratchet shaft 72 moves downward along with the downward movement of the ratchet shaft 71, and the driving pawl 104 and the non-return pawl 105 are always in contact with the ratchet 9 during the downward movement of the ratchet shaft 72. The operator continues to rock the driving swing rod 101, the ratchet wheel 9 continues to rotate, but the second gear 8 does not rotate any more, and therefore the phenomenon that the bending angle is too large due to misoperation is avoided.

The third clamping device 61 is manually rotated to reset and touch a reset switch, the reset switch controls the electromagnet 18 to be electrified, as shown in fig. 4, the rocker 16 swings leftwards under the action of the attraction force of the electromagnet 18, so that the slide block 14 is driven to move rightwards, the roller 131 enters the first step groove 1411 from the second step groove 1412, and the ratchet shaft 72 moves upwards along with the roller and the gear shaft 71.

The working principle of the small metal pipe bending device is as follows:

clamping and fixing one end of the metal tube 3 by using the fixed end clamping part 2, adjusting the third clamping device 61 to fixedly clamp the metal tube 3 between the roller 5 and the third clamping device 61, and adjusting the ruler rod 12 to a set angle;

rotating the driving swing rod 101, wherein the driving swing rod 101 swings to drive the driving pawl 104 to drive the ratchet wheel 9 to rotate, the ratchet wheel 9 rotates to drive the second gear 8 to coaxially rotate, the second gear 8 rotates to drive the first gear 6 to rotate, the first gear 6 rotates to drive the third clamping device 61 to rotate, and the third clamping device 61 rotates to push the metal pipe 3 to be bent close to the roller 5;

when the metal tube 3 is bent to a set angle, the protrusion 613 of the third clamping device 61 touches the in-place switch 19 to power off the electromagnet 18, then the rocker 16 swings rightwards under the action of the elastic member 17, the ratchet wheel 9, the bracket 13 and the like to drive the slider 14 to move leftwards, the roller 131 enters the second step groove 1412 from the first step groove 1411, the ratchet shaft 72 moves downwards along with the downward movement to be separated from the gear shaft 71, at this time, an operator continues to rock the active swing rod 101, the ratchet wheel 9 continues to rotate, but the second gear 8 does not rotate any more, and thus the occurrence of overlarge bending angle caused by misoperation is avoided.

The fixed end clamping part 2 and the third clamping device 61 are loosened, and the bent metal pipe 3 is taken down.

The words of front, back, left, right, up and down, etc. in the present invention are only for convenience of describing the structure and do not form a limitation on the technical solution. The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A small metal pipe bending device is characterized by comprising a rack (1), wherein a fixed end clamping part (2) and a first mandrel (4) are arranged on the rack (1), and a roller (5) is arranged on the first mandrel (4); a first gear (6) is further rotatably arranged on the first mandrel (4), and a third clamping device (61) is fixedly arranged on the first gear (6); an angle ruler (11) is arranged on the rack (1), and a ruler rod (12) is rotatably arranged on the first mandrel (4);

a first rotating shaft (7) is further rotatably arranged on the rack (1), a second gear (8) and a ratchet wheel (9) are fixedly arranged on the first rotating shaft (7), the second gear (8) is meshed with the first gear (6), and the ratchet wheel (9) is connected with a ratchet wheel driving mechanism (10);

the first rotating shaft (7) comprises a gear shaft (71) which is rotatably arranged on the rack (1) and a ratchet shaft (72) which is slidably arranged on the rack (1), a second gear (8) and a first connecting shaft sleeve (73) are arranged on the gear shaft (71), a second connecting shaft sleeve (74) which is matched with the first connecting shaft sleeve (73) is arranged on the ratchet shaft (72), a ratchet wheel (9) is fixedly arranged in the middle of the ratchet shaft (72), and a support (13) is rotatably connected to the lower end of the ratchet shaft (72); the support (13) is provided with a roller (131), the roller (131) is connected with a sliding block (14), and the sliding block (14) is provided with a stepped groove (141); the sliding block (14) is connected with a second connecting rod (15), the second connecting rod (15) is hinged with a rocker (16), the middle part of the rocker (16) is hinged on the rack (1), and the other end of the rocker is connected with an elastic part (17); an electromagnet (18) is arranged on the rack (1), an in-place switch (19) is arranged on the ruler rod (12), and a reset switch is arranged on the third clamping device (61);

the ratchet driving mechanism (10) comprises a driving swing rod (101), the middle part of the driving swing rod (101) is hinged to the rack (1), one end of the driving swing rod (101) is hinged to a first connecting rod (102), the first connecting rod (102) is hinged to a driven swing rod (103), and one end of the driven swing rod (103) is sleeved on the first rotating shaft (7) in an empty mode; a driving pawl (104) is arranged on the driven swing rod (103), and a non-return pawl (105) is arranged on the rack (1);

the roller (5) is detachably arranged on the first mandrel (4);

the third clamping device (61) comprises an arc-shaped pressing part (611) which is arranged on the first gear (6) in a sliding mode, and the pressing part (611) is connected with a spiral clamping driving mechanism (612).

2. The small metal pipe bending device according to claim 1, wherein the stepped groove (141) comprises a first stepped groove (1411) and a second stepped groove (1412) which are communicated, and the first stepped groove (1411) is located above the second stepped groove (1412).

3. The small metal tube bending device according to claim 1, wherein the fixed end clamping portion (2) comprises a first clamping device (21) and a second clamping device (22), and the first clamping device (21) and the second clamping device (22) are provided with clamping blocks in the shape of circular arcs.