Clamping die driving device of pipe bending machine

Abstract

The utility model discloses a pipe bending machine clamping die driving device which comprises a linear guide rail fixedly installed on the top of a pipe bending arm, a clamping die base used for installing a clamping die is arranged on the linear guide rail in a sliding mode through a sliding block, a fan-shaped clamping gear is arranged below the clamping die base, the fan-shaped clamping gear is hinged to the interior of the pipe bending arm through a supporting shaft, and the supporting shaft is connected with the clamping die base. A clamping die base driving part is fixed to the bottom of the clamping die base, a two-hole plate is arranged between the clamping die base driving part and the fan-shaped clamping gear, one end of the two-hole plate is hinged to the clamping die base driving part through a first pin shaft, and the other end of the two-hole plate is hinged to one end of the fan-shaped clamping gear through a second pin shaft. A clamping rack which is matched with the fan-shaped clamping gear in a meshed mode is arranged below the fan-shaped clamping gear, the clamping rack is provided with a rack connecting portion, a horizontally-placed clamping oil cylinder is fixedly installed in the pipe bending arm, and a piston rod of the clamping oil cylinder is fixed to the rack connecting portion of the clamping rack. The utility model has the advantage of being convenient for workers to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe bending equipment, in particular to a clamping die driving device of a pipe bender. Background Art

[0002] In a pipe bender, a pipe bending arm is fixedly connected to a pipe bending main shaft of the pipe bender, a wheel die is arranged at the top of the pipe bending main shaft, and a clamping die matched with the wheel die can approach or move away from the wheel die under the drive of a clamping die driving device.

[0003] Currently, a clamping die driving device is disclosed in an invention patent with a patent application number of 201610022794.0 and a patent name of "Pipe Bending Device in a Pipe Bender". The specific structure of the clamping die driving device disclosed in the invention patent includes: a clamping die seat for installing the clamping die, the clamping die seat is slidably arranged on a horizontal guide rail at the top of the pipe bending arm, a clamping oil cylinder is arranged in the pipe bending arm below the clamping die seat, the cylinder body of the clamping oil cylinder is hinged to the pipe bending arm, and the piston rod of the clamping oil cylinder is connected to the clamping die seat through a connecting rod structure. When it is necessary to make the clamping die cooperate with the wheel die to clamp the pipe, the piston rod of the clamping oil cylinder is extended outwards, and the clamping oil cylinder drives the clamping die seat and the clamping die to translate along the horizontal guide rail to approach the wheel die through the connecting rod structure until the clamping die reaches a clamping station where it can cooperate with the wheel die to clamp the pipe; when it is necessary to make the clamping die loosen the pipe, the piston rod of the clamping oil cylinder is retracted inwards, and the clamping oil cylinder drives the clamping die seat and the clamping die to translate along the horizontal guide rail to move away from the wheel die through the connecting rod structure until the clamping die reaches a clamping release station for releasing the pipe.

[0004] The disadvantages of the above clamping die driving device are as follows: the clamping oil cylinder drives the clamping die to translate to the clamping station by extending its piston rod upwards. Since the stroke direction of the piston rod of the clamping oil cylinder is inclined upwards, and at the same time, since the length of the cylinder body size of the clamping oil cylinder is adapted to the piston rod, the pipe bending arm must be high enough to meet the upward movement stroke space of the piston rod of the clamping oil cylinder and the installation of the cylinder body of the clamping oil cylinder. Moreover, the increase in the height of the pipe bending arm will not only cause the height of the clamping die installed at its top to become higher, making the pipe bending operation height where the clamping die cooperates with the wheel die higher and causing inconvenience for workers to perform pipe bending operations, but also cause the overall height of the pipe bender to become higher, increasing the manufacturing cost. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a clamping die driving device of a pipe bender that is beneficial to reducing the overall height of the pipe bender and has high stability.

[0006] To achieve the above object, the utility model adopts the following technical solutions: A clamping die driving device for a pipe bender, comprising a linear guide rail fixedly installed at the top of the pipe bending arm. A clamping die seat for installing a clamping die is slidably arranged on the linear guide rail through a slider. A sector-shaped clamping gear is arranged below the clamping die seat. The sector-shaped clamping gear is hinged in the pipe bending arm through a support shaft. A clamping die seat driving part is fixed at the bottom of the clamping die seat. A two-hole plate is arranged between the clamping die seat driving part and the sector-shaped clamping gear. One end of the two-hole plate is hinged to the clamping die seat driving part through a first pin shaft. The other end of the two-hole plate is hinged to one end of the sector-shaped clamping gear through a second pin shaft. A clamping rack which is meshed and matched is arranged below the sector-shaped clamping gear. One end of the clamping rack extends downward to form a rack connecting part. A horizontally placed clamping oil cylinder is fixedly installed in the pipe bending arm below the clamping rack. The piston rod of the clamping oil cylinder is fixed to the rack connecting part of the clamping rack.

[0007] Further, in the above-mentioned clamping die driving device for a pipe bender, there is: a guiding and supporting part is arranged below the clamping rack, and the guiding and supporting part can enable the clamping rack to always be stably meshed with the sector-shaped clamping gear.

[0008] Further, in the above-mentioned clamping die driving device for a pipe bender, there is: the guiding and supporting part includes: a supporting wheel movably supported in the pipe bending arm below the clamping rack through a roller pin shaft. End caps with a diameter larger than that of the supporting wheel are coaxially installed at both ends of the supporting wheel respectively. Guide grooves for stably guiding the clamping rack are formed between the two side end caps and the supporting wheel.

[0009] Further, in the above-mentioned clamping die driving device for a pipe bender, there is: when the piston rod of the clamping oil cylinder fully extends, the clamping oil cylinder just drives the clamping die seat and the clamping die to move along the linear guide rail to the clamping station where the clamping die is matched with the wheel die of the pipe bender to clamp the pipe through the clamping rack, the sector-shaped clamping gear and the two-hole plate. At this time, the first pin shaft serving as the hinge point between the clamping die seat and the two-hole plate, the second pin shaft serving as the hinge point between the two-hole plate and the sector-shaped clamping gear, and the support shaft serving as the hinge point between the sector-shaped clamping gear and the pipe bending arm are exactly located on the same horizontal straight line.

[0010] By implementing the above technical solutions, the beneficial effects of the present utility model are as follows: (1) The clamping oil cylinder is horizontally arranged, and the stroke direction of the piston rod of the clamping oil cylinder is horizontal. In this way, the stroke direction of the piston rod of the clamping oil cylinder will not cause the height of the pipe bending arm to increase. Therefore, the designed height of the pipe bending arm can be reduced, and thus the pipe bending operation height of the clamping die can also be correspondingly reduced, making it more convenient for workers to perform pipe bending operations; moreover, the reduction in the height of the pipe bending arm also reduces the manufacturing cost of the enterprise; (2) The clamping oil cylinder is horizontally arranged. When the clamping die is cooperating with the wheel die to bend the pipe, the force applied will not be exerted on the cylinder block of the clamping oil cylinder, making the force on the cylinder block of the clamping oil cylinder smaller, and thus extending the service life of the clamping oil cylinder; (3) The clamping oil cylinder drives the clamping die seat and the clamping die to move through the driving structure of the clamping rack, the sector-shaped clamping gear, and the two-hole plate, with higher use stability. Brief Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of the clamping die seat in the clamping die driving device of the pipe bender of the present utility model when the clamping die is in the pipe clamping position where it can cooperate with the pipe bender wheel die to clamp the pipe.

[0012] Figure 2 It is Figure 1 the A-A cross-sectional view shown in

[0013] Figure 3 It is Figure 1 a three-dimensional schematic diagram of the connection relationship between the clamping die seat, the two-hole plate, the sector-shaped clamping gear, the clamping rack, and the clamping oil cylinder after the pipe bending arm is hidden in

[0014] Figure 4 It is a schematic structural diagram of the clamping die seat.

[0015] Figure 5 It is a schematic structural diagram of the sector-shaped clamping gear.

[0016] Figure 6 It is a schematic structural diagram of the clamping rack.

[0017] Figure 7 It is a three-dimensional schematic diagram of the assembly of the supporting wheel and the two end covers on both sides. Detailed Embodiment

[0018] In order to make the purpose, technical solutions, and advantages of the present utility model clearer, the following further details the present utility model in conjunction with the drawings and embodiments. In this embodiment, in order to better explain and illustrate the technical solutions, the four directions of "front", "rear", "left", and "right" of the present utility model are first defined. The length direction of the pipe bending arm is defined as the front-rear direction, and the width direction of the pipe bending arm is defined as the left-right direction. Among them, along the length direction of the pipe bending arm, the side of the pipe bending arm close to the pipe bending main shaft of the pipe bender is defined as "front", and the other side of the pipe bending arm far from the pipe bending main shaft of the pipe bender is defined as "rear";

[0019] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 shown, the clamping die driving device of the pipe bender includes a linear guide rail 2 fixedly installed at the top of the pipe bending arm 1. The linear guide rail 2 is horizontally arranged and extends in the front-rear direction towards the pipe bending spindle 19 of the pipe bender on the pipe bending arm 1. A clamping die seat 4 for installing the clamping die 3 is slidably arranged on the linear guide rail 2 through a slider 5. In this embodiment, the cooperation mode between the slider 5 and the linear guide rail 2 adopts a common track pair structure, that is, the slider 5 can only translate along the linear guide rail 2 and will not be disengaged upward from the linear guide rail 2 during the translation process. Since the structures of the slider 5 and the linear guide rail 2 are existing structures, they will not be elaborated here; a sector clamping gear 6 is arranged below the clamping die seat 4. The sector clamping gear 6 is hinged between the left and right side plates of the pipe bending arm 1 through a support shaft 7. The support shaft 7 is in the left-right direction; a clamping die seat driving part 41 is fixedly installed at the front end of the bottom of the clamping die seat 4. A two-hole plate 8 is arranged between the clamping die seat driving part 41 and the sector clamping gear 6. One end of the two-hole plate 8 is hinged to the clamping die seat driving part 41 through a first pin shaft 9. The first pin shaft 9 is in the left-right direction. The other end of the two-hole plate 8 is hinged to one end of the sector clamping gear 6 through a second pin shaft 10. The second pin shaft 10 is also in the left-right direction. A clamping rack 11 is arranged below the sector clamping gear 6. The clamping rack 11 is meshed and cooperated with the sector clamping gear 6. One end of the clamping rack 11 extends downward to form a rack connecting part 12. A horizontally placed clamping oil cylinder 13 is fixedly installed in the pipe bending arm 1 below the clamping rack 11. The clamping oil cylinder 13 is arranged in the front-rear direction; the piston rod 131 of the clamping oil cylinder 13 is fixed to the rack connecting part 12 of the clamping rack 11;

[0020] In this embodiment, a guiding and supporting part is arranged below the clamping rack 11. The guiding and supporting part can make the clamping rack always be stably meshed with the sector clamping gear; the guiding and supporting part includes: a supporting wheel 15 movably supported between the left and right side plates of the pipe bending arm 1 below the clamping rack 11 through a roller pin shaft 14. End caps 16 with a diameter larger than that of the supporting wheel 15 are coaxially installed at both ends of the supporting wheel 15. A guiding groove 17 for smoothly guiding the clamping rack 11 is formed between the two side end caps 16 and the supporting wheel 15. During installation, the clamping rack 11 is placed on the supporting wheel 15 and moves along the guiding groove 17; and because the supporting wheel can rotate freely, the cooperation between the supporting wheel 15 and the clamping rack 11 is rolling friction, avoiding damage to the clamping rack caused by hard friction;

[0021] In this embodiment, when the piston rod 131 of the clamping oil cylinder 13 fully extends, the clamping oil cylinder 13 just drives the die holder 4 and the clamping die 3 to move along the linear guide rail 2 to the clamping station where they cooperate with the wheel die 18 of the pipe bender to clamp the pipe through the clamping rack 11, the sector-shaped clamping gear 6 and the two-hole plate 8. At this time, the first pin shaft 9, which is the hinge point between the die holder 4 and the two-hole plate 8, the second pin shaft 10, which is the hinge point between the two-hole plate 8 and the sector-shaped clamping gear 6, and the support shaft 7, which is the hinge point between the sector-shaped clamping gear 6 and the pipe bending arm 1, are exactly on the same horizontal line. This can ensure that when the clamping die 3 is stressed during the pipe bending process of the pipe bender, the clamping die 3 and the die holder 4 will not retract backward along the direct guide rail 2, ensuring that the clamping die 3 can be stably in the clamping station, thus ensuring the stable and smooth progress of the pipe bending work.

[0022] During actual use, the clamping die 3 that cooperates with the wheel die 18 to clamp the pipe is installed on the die holder 4; when it is necessary to move the clamping die 3 towards the wheel die 18 to the clamping station where it can cooperate with the wheel die 18 to clamp the pipe, the piston rod 131 of the clamping oil cylinder 13 extends horizontally forward. During the process of the piston rod 131 of the clamping oil cylinder 13 extending horizontally forward, the piston rod 131 will synchronously drive the clamping rack 11 to move horizontally forward along the guide groove 17. During the process of the clamping rack 11 moving horizontally forward, the clamping rack 11 will drive the sector-shaped clamping gear 6 meshing with it to rotate clockwise forward around the support shaft 7. During the process of the sector-shaped clamping gear 6 rotating forward around the support shaft 7, the sector-shaped clamping gear 6 will drive the die holder 4 to move forward along the linear guide rail 2 through the two-hole plate 8, synchronously driving the clamping die 3 to move forward; when the piston rod 131 of the clamping oil cylinder 13 fully extends, the clamping die 3 just moves forward to the clamping station where it cooperates with the wheel die 18 of the pipe bender to clamp the pipe, and at this time, the first pin shaft 9, which is the hinge point between the die holder 4 and the two-hole plate 8, the second pin shaft 10, which is the hinge point between the two-hole plate 8 and the sector-shaped clamping gear 6, and the support shaft 7, which is the hinge point between the sector-shaped clamping gear 6 and the pipe bending arm 1, are exactly on the same horizontal line. This can ensure that when the clamping die 3 is stressed during the pipe bending process of the pipe bender, the clamping die 3 and the die holder 4 will not retract backward along the direct guide rail 2, ensuring that the clamping die 3 can be stably in the clamping station, thus ensuring the stable and smooth progress of the pipe bending work.

[0023] When it is necessary to loosen the pipe by the clamping die 3, the piston rod 131 of the clamping oil cylinder 13 retracts horizontally backward. During the horizontal backward retraction of the piston rod 131 of the clamping oil cylinder 13, the piston rod 131 will synchronously drive the clamping rack 11 to move horizontally backward along the guide groove 17. During the horizontal backward movement of the clamping rack 11, the clamping rack 11 will drive the meshing sector clamping gear 6 to rotate counterclockwise backward around the support shaft 7. During the backward rotation of the sector clamping gear 6 around the support shaft 7, the sector clamping gear 6 will drive the clamping die holder 4 to move backward along the linear guide rail 2 through the two-hole plate 8, and synchronously drive the clamping die 3 to move backward until the clamping die 3 retracts backward to the unclamping station for loosening the pipe.

[0024] The advantages of the present utility model are as follows: (1) The clamping oil cylinder is horizontally arranged, and the stroke direction of the piston rod of the clamping oil cylinder is horizontal. In this way, the stroke direction of the piston rod of the clamping oil cylinder will not cause the height of the pipe bending arm to increase. Therefore, the designed height of the pipe bending arm can be reduced, and then the pipe bending operation height of the clamping die can also be correspondingly reduced, making it more convenient for workers to perform pipe bending operations; moreover, the reduction of the height of the pipe bending arm also reduces the manufacturing cost of the enterprise; (2) The clamping oil cylinder is horizontally arranged, and the force exerted on the clamping oil cylinder body will not be applied during the pipe bending process when the clamping die cooperates with the wheel die, making the force on the cylinder body of the clamping oil cylinder smaller, and thus extending the service life of the clamping oil cylinder; (3) The clamping oil cylinder drives the clamping die holder and the clamping die to move through the driving structure of the clamping rack, the sector clamping gear and the two-hole plate, with higher use stability.

[0025] The above description is only a preferred embodiment of the present utility model, and does not limit the present utility model in any other form. Any modification or equivalent change made according to the technical essence of the present utility model still belongs to the scope protected by the present utility model.

Claims

1. Bend pipe machine clamping die driving device, characterized in that: It includes a linear guide rail fixedly installed at the top of the elbow arm. A die clamping seat for installing a die is slidably arranged on the linear guide rail through a slider. A sector clamping gear is arranged below the die clamping seat. The sector clamping gear is hinged in the elbow arm through a support shaft. A die clamping seat driving part is fixed at the bottom of the die clamping seat. A two-hole plate is arranged between the die clamping seat driving part and the sector clamping gear. One end of the two-hole plate is hinged to the die clamping seat driving part through a first pin shaft. The other end of the two-hole plate is hinged to one end of the sector clamping gear through a second pin shaft. A clamping rack which is meshed and matched is arranged below the sector clamping gear. One end of the clamping rack extends downward to form a rack connecting part. A horizontally placed clamping oil cylinder is fixedly installed in the elbow arm below the clamping rack. The piston rod of the clamping oil cylinder is fixed to the rack connecting part of the clamping rack.

2. The clamping die driving device of the elbow pipe machine according to claim 1, characterized in that: A guiding and supporting part is arranged below the clamping rack. The guiding and supporting part can make the clamping rack always stably meshed with the sector clamping gear.

3. The clamping die driving device of the elbow pipe bender according to claim 2, characterized in that: The guiding and supporting part includes: a supporting wheel movably supported in the elbow arm below the clamping rack through a roller pin shaft. End caps with a diameter larger than that of the supporting wheel are coaxially installed at both ends of the supporting wheel respectively. A guiding groove for stably guiding the clamping rack is formed between the two side end caps and the supporting wheel.

4. The clamping die driving device of the elbow pipe machine according to claim 1 or 2 or 3, characterized in that: When the piston rod of the clamping oil cylinder fully extends, the clamping oil cylinder just drives the die clamping seat and the die to move along the linear guide rail to the clamping station for clamping the pipe in cooperation with the wheel die of the pipe bender through the clamping rack, the sector clamping gear and the two-hole plate. At this time, the first pin shaft which is the hinge point between the die clamping seat and the two-hole plate, the second pin shaft which is the hinge point between the two-hole plate and the sector clamping gear, and the support shaft which is the hinge point between the sector clamping gear and the elbow arm are exactly located on the same horizontal line.

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