CN-119260869-B - Erhu pull rod bending machine

Abstract

The invention discloses a two-stringed bowed instrument pull rod bending machine, which relates to the technical field of instrument processing and comprises a frame, a controller, a bending mechanism, two bending mechanisms, a bending angle adjusting mechanism and a hydraulic mechanism, wherein the hydraulic mechanism is arranged in the frame, the bending mechanism, the two bending mechanisms and the controller are arranged at the upper end of the frame, the bending angle adjusting mechanism is arranged at one side of the bending mechanism, and the controller is connected with the hydraulic mechanism. Through the setting of frame, controller, a mechanism of bending, two mechanisms of bending, angle adjustment mechanism and hydraulic pressure mechanism of bending, the angle of buckling and the shape of buckling of control pull rod tip that can be automatic and accurate, and can realize once buckling or secondary bending to the tip of pull rod.

Inventors

• ZHOU LI
• Yao Chenlei

Assignees

• 上海民族乐器一厂有限公司

Dates

Publication Date

20260508

Application Date

20241101

Claims (9)

1. 1. The Erhu pull rod bending machine is characterized by comprising a frame, a controller, a bending mechanism, two bending mechanisms, a bending angle adjusting mechanism and a hydraulic mechanism, wherein the hydraulic mechanism is arranged in the frame, the bending mechanism, the two bending mechanisms and the controller are arranged at the upper end of the frame, the bending angle adjusting mechanism is arranged at one side of the bending mechanism, and the controller is connected with the hydraulic mechanism; The two-fold bending mechanism comprises end plates, a first swing arm mechanism, a second swing arm, a third swing arm, a first transmission shaft, a second transmission shaft, a first pressure rod, a second pressure rod, a first main bent pipe and a second main bent pipe, wherein the two end plates are opposite to each other and are arranged at the upper end of the frame, the first transmission shaft, the first main bent pipe, the second main bent pipe and the second transmission shaft are sequentially arranged between the two end plates from top to bottom, one side of one end plate is provided with the second swing arm and the third swing arm, one side of the other end plate is provided with the first swing arm mechanism, the first swing arm mechanism is connected with the hydraulic mechanism, one end of the second swing arm and the first swing arm mechanism are connected with two ends of the first transmission shaft, one end of the third swing arm and two ends of the first swing arm mechanism are connected with two ends of the second transmission shaft, two ends of the first swing arm are connected with the other end of the second swing arm and the first swing arm mechanism, two ends of the second swing arm are connected with the first swing arm and the first swing arm mechanism are positioned at two sides of the first pressure rod; A plurality of first arc grooves are formed in the outer wall of the first main bent pipe, a plurality of second arc grooves are formed in the outer wall of the second main bent pipe, the first arc grooves are opposite to the second arc grooves, and a plurality of first annular grooves are formed in each of the first compression rod and the second compression rod; The first swing arm mechanism comprises a first connecting arm, a second connecting arm and a third connecting arm, the middle part of the first connecting arm is connected with one end of a first transmission shaft, one end of the first connecting arm is connected with one end of a first pressing rod, one end of the second connecting arm is hinged with the other end of the first connecting arm, the other end of the second connecting arm is hinged with one end of the third connecting arm and one end of the second pressing rod, the middle part of the third connecting arm is connected with one end of the second transmission shaft, and the other end of the third connecting arm is connected with the hydraulic mechanism.
2. 2. The two-stringed bowed instrument pull rod bending machine according to claim 1, wherein the hydraulic mechanism comprises a hydraulic station, a first oil cylinder and a second oil cylinder, a piston rod of the first oil cylinder is connected with the first swing arm mechanism, a piston rod of the second oil cylinder is connected with the bending mechanism, and the first oil cylinder and the second oil cylinder are respectively connected with the hydraulic station.
3. 3. The two-stringed bowed instrument pull rod bending machine according to claim 2, further comprising a first limit sensor, a second limit sensor, a first limit baffle and a second limit baffle, wherein a piston rod of the first oil cylinder is provided with a first oil cylinder connecting piece, a piston rod of the second oil cylinder is provided with a second oil cylinder connecting piece, the first limit sensor is arranged on two sides of the first oil cylinder, the second limit sensor is arranged on two sides of the second oil cylinder, the first limit baffle is arranged on the first oil cylinder connecting piece, the second limit baffle is arranged on the second oil cylinder connecting piece, the first limit baffle can be contacted with the first limit sensor, the second limit baffle can be contacted with the second limit sensor, and the hydraulic station, the first limit sensor and the second limit sensor are respectively connected with the controller.
4. 4. The two-stringed bowed instrument pull rod bending machine according to claim 1, further comprising a first heating pipe sleeve, a pressing mechanism and a moving plate, wherein the moving plate is movably arranged at the upper ends of the two end plates, the lower end of the pressing mechanism penetrates through the moving plate and is connected with the first main bent pipe, and the first heating pipe sleeve is arranged on each of the first main bent pipe and the second main bent pipe.
5. 5. The two-stringed bowed instrument pull rod bending machine according to claim 4, wherein the pressing mechanism comprises a threaded sleeve, a screw rod, a handle and a bolt jacking block, the threaded sleeve penetrates through the movable plate, the screw rod is arranged in the threaded sleeve, the handle is arranged at the upper end of the screw rod, the bolt jacking block is arranged at the upper end of the first main bent pipe, a positioning hole is formed in the bolt jacking block, and the lower end of the screw rod extends into the positioning hole.
6. 6. The two-stringed bowed instrument pull rod bending machine according to claim 1, wherein the bending mechanism comprises a connecting seat, a third transmission shaft, a third main bent pipe, a third compression bar, a fourth swing arm and a fifth swing arm, wherein two connecting seats are opposite to the upper end of the frame, the third main bent pipe is arranged between the two connecting seats, a plurality of third arc grooves are arranged on the outer wall of the third main bent pipe, the third transmission shaft is arranged at the lower end of the third main bent pipe, one of the connecting seats is provided with the fourth swing arm, the other connecting seat is provided with the fifth swing arm, two ends of the third compression bar are connected with one end of the fourth swing arm and one end of the fifth swing arm, the outer wall of the third compression bar is provided with a plurality of second annular grooves, the other end of the fourth swing arm is connected with the hydraulic mechanism, and two ends of the third transmission shaft are connected with the middle part of the fourth swing arm and the other end of the fifth swing arm.
7. 7. The two-stringed bowed instrument pull rod bending machine according to claim 6, wherein the fourth swing arm is arranged in a V shape.
8. 8. The two-stringed bowed instrument pull rod bending machine according to claim 6, wherein the bending angle adjusting mechanism comprises a fixed block, a hand wheel, a threaded column and a sliding block, the fixed block is arranged on one side of the third main elbow, the threaded column is connected to the fixed block in a threaded manner, one end of the threaded column is connected with the hand wheel, the other end of the threaded column is connected with the sliding block, the sliding block is opposite to the third main elbow, and a plurality of first notches are formed in one side of the sliding block.
9. 9. The two-stringed bowed instrument pull rod bending machine according to claim 8, further comprising a bottom plate, wherein the bottom plate is arranged at the lower end of the sliding block, the bottom plate is connected with the frame, and the sliding block is slidably connected with the bottom plate.

Description

Erhu pull rod bending machine Technical Field The invention relates to the technical field of instrument processing, in particular to a Erhu pull rod bending machine. Background The two-stringed instrument is a Chinese traditional string instrument, which starts from Tang dynasty, original Huqin, to the latest renaming of the two-stringed instrument, and starts to develop vigorously, and the two-stringed instrument has a history of over one thousand years from generation to date, and is a very characteristic solo instrument, and the traditional two-stringed instrument generally comprises a wooden barrel, a string and a string bow. The end of the pull rod matched with the Erhu is generally in an arc shape of one bending (one radian) or two bending (two radians), and the bending angle of the end of the Erhu generally has strict requirements. The two-stringed bowed instrument pull rod in the prior art is bent through clamping of the handheld clamp, the bending angle and the bending shape cannot be guaranteed by the bending mode, the difficulty of bending is higher for the pull rod which is bent for the second time, and the bending angle and the bending shape are more difficult to control. Disclosure of Invention The invention aims to provide a Erhu pull rod bending machine which is used for solving the technical problems. The technical scheme adopted by the invention is as follows: The two-stringed bowed instrument pull rod bending machine comprises a frame, a controller, a bending mechanism, two bending mechanisms, a bending angle adjusting mechanism and a hydraulic mechanism, wherein the hydraulic mechanism is arranged in the frame, the bending mechanism, the two bending mechanisms and the controller are arranged at the upper end of the frame, the bending angle adjusting mechanism is arranged at one side of the bending mechanism, and the controller is connected with the hydraulic mechanism; The two-fold bending mechanism comprises end plates, a first swing arm mechanism, a second swing arm, a third swing arm, a first transmission shaft, a second transmission shaft, a first pressure rod, a second pressure rod, a first main bent pipe and a second main bent pipe, wherein the two end plates are opposite to each other and are arranged at the upper end of the frame, the first transmission shaft, the first main bent pipe, the second main bent pipe and the second transmission shaft are sequentially arranged between the two end plates from top to bottom, one side of one end plate is provided with the second swing arm and the third swing arm, one side of the other end plate is provided with the first swing arm mechanism, the first swing arm mechanism is connected with the hydraulic mechanism, one end of the second swing arm and the first swing arm mechanism are connected with the two ends of the first transmission shaft, one end of the third swing arm mechanism and the two ends of the first swing arm mechanism are connected with the other end of the second swing arm mechanism and the first swing arm mechanism, the two ends of the second swing arm mechanism and the first swing arm mechanism are connected with the two ends of the first swing arm mechanism and the first pressure rod and the two sides of the first swing arm mechanism are positioned on the two sides of the first swing arm; The outer wall of the first main bent pipe is provided with a plurality of first arc grooves, the outer wall of the second main bent pipe is provided with a plurality of second arc grooves, the first arc grooves are opposite to the second arc grooves, and the first compression bar and the second compression bar are provided with a plurality of first annular grooves. Preferably, the hydraulic mechanism comprises a hydraulic station, a first oil cylinder and a second oil cylinder, a piston rod of the first oil cylinder is connected with the first swing arm mechanism, a piston rod of the second oil cylinder is connected with the bending mechanism, and the first oil cylinder and the second oil cylinder are respectively connected with the hydraulic station. As a further preferable mode, the hydraulic control device further comprises a first limit sensor, a second limit sensor, a first limit baffle and a second limit baffle, wherein a first oil cylinder connecting piece is arranged on a piston rod of the first oil cylinder, a second oil cylinder connecting piece is arranged on a piston rod of the second oil cylinder, the first limit sensor is arranged on two sides of the first oil cylinder, the second limit sensor is arranged on two sides of the second oil cylinder, the first limit baffle is arranged on the first oil cylinder connecting piece, the second limit baffle is arranged on the second oil cylinder connecting piece, the first limit baffle can be in contact with the first limit sensor, the second limit baffle can be in contact with the second limit sensor, and the hydraulic station, the first limit sensor and the second limit sensor are