Short-thread-end thread trimming transmission mechanism of high-platform roller lathe

Abstract

The utility model relates to a short thread end trimming transmission mechanism of a high-platform roller lathe, which comprises an electromagnetic valve, an electromagnetic valve push rod in the electromagnetic valve is connected with a lever, a transmission connecting rod is arranged on the right side of the electromagnetic valve, and the head of the transmission connecting rod is connected with the left end of the lever through a first universal joint and a first axial screw. A thread trimming cam is arranged in front of the middle of the lever and connected with a cam linkage shaft in a matched mode, the thread trimming cam is fixedly connected with a transmission main shaft, the rear portion of a transmission connecting rod is connected with the head of a rack through a second universal joint and a second axial screw, and a transmission gear meshed with the rack is arranged on the right side of the middle of the rack and fixed to the outer circle of a vertical shaft outer sleeve. The front end of the head of the vertical shaft outer sleeve is provided with a short-thread-end thread trimming movable cutter; according to the utility model, not only is the short-thread-end cold cutting thread trimming transmission function improved, but also the rigid transmission defect of thread trimming transmission in the prior art is overcome, the transmission noise is reduced, the transmission stability is ensured, and the service life of parts is prolonged.

Description

[Technical field]

[0001] The utility model belongs to the technical field of sewing equipment, in particular to a short thread cutting transmission mechanism for a high-platform roller sewing machine. [Background Technology]

[0002] At present, the thread-cutting transmission mode of the high-platform roller sewing machine used for sewing medium-thick materials is mostly implemented by electromagnets driving a group of common connecting rods, cranks, levers, cams and other linkage mechanisms. Due to structural limitations, this transmission mode has two obvious defects:

[0003] 1. Since the driving connection between the push rod and the crank and the lever mostly adopts the hard connection between the pin and the shaft hole, it is inevitable that dead points or stuck points will appear during the transmission process due to the change of angle, which will cause the parts to be damaged during the movement and increase the transmission noise;

[0004] 2. Due to structural limitations, the distance between the axis of the push rod and the axis of the crank is relatively large. In order to meet the larger rotation angle of the short-thread head moving knife, it is necessary to increase the rise angle of the thread trimming cam to achieve transmission. This not only increases the transmission resistance of the mechanism, but also causes high transmission noise. [Contents of the utility model]

[0005] The purpose of the utility model is to solve the above-mentioned shortcomings and provide a high-platform roller car short-thread head shearing transmission mechanism, which not only improves the short-thread head cold cutting shearing transmission function, but also overcomes the rigid transmission defects of the prior art shearing transmission, reduces the transmission noise, thereby ensuring the stability of the transmission and prolonging the service life of the parts.

[0006] In order to achieve the above purpose, a high-platform roller car short-thread trimming transmission mechanism is designed, including a solenoid valve 1, the head of the solenoid valve push rod 2 inside the solenoid valve 1 is connected to a lever 6, a transmission connecting rod 4 is arranged on the right side of the solenoid valve 1, the head of the transmission connecting rod 4 is connected to a universal joint head 501, and is connected to the left end of the lever 6 through the universal joint head 501 and an axial screw 5a, a cam linkage shaft 8 is arranged in the middle of the lever 6, a lever connecting seat 7 is connected to the right end of the lever 6, a trimming cam 9 is arranged in the front of the middle of the lever 6, and the trimming cam 9 is connected to the cam The wheel linkage shaft 8 is connected in cooperation, and the thread trimming cam 9 is fixedly connected to the transmission main shaft 17. The rear part of the transmission connecting rod 4 is connected with a universal joint head 502, and is connected to the head of the rack 13 through the universal joint head 502 and the axial screw 5b. A transmission gear 11 is provided on the right side of the middle part of the rack 13. The transmission gear 11 is meshed and connected with the rack 13. The transmission gear 11 is fixed to the outer circle of the vertical axis sleeve 12. The vertical axis sleeve 12 is sleeved on the transmission main shaft 17, and a short thread head thread trimming movable knife 16 is installed at the front end of the head of the vertical axis sleeve 12.

[0007] Furthermore, a lever joint 3 is provided between the head of the solenoid valve push rod 2 and the lever 6. The lever joint 3 is an L-shaped structure as a whole. One end of the lever joint 3 is connected to the solenoid valve push rod 2, and the other end of the lever joint 3 is connected to the inner side of the left end of the lever 6, and the side connected to the lever 6 is in a downward-bent V-shape, thereby further reducing the parallel meshing distance between the central axis of the transmission gear and the rack.

[0008] Furthermore, a pressure plate 14 is provided on the top of the rack 13, a rack backer 15 is provided on the left inner side of the rack 13, and the pressure plate 14 is pressed on the rack 13 and the rack backer 15, thereby ensuring the stability of transmission.

[0009] Furthermore, it also includes a reset spring 10, the rear end of which is connected to the bottom plate of the roller car housing, and the head of the reset spring 10 is connected to the lever 6, so that after the thread cutting action is completed, the solenoid valve stops working and the reset spring can be used to reset the entire mechanism, reducing the time of the entire transmission process.

[0010] Furthermore, a lifting groove is provided on the thread trimming cam 9, and is connected with the cam linkage shaft 8 through the lifting groove. The cam linkage shaft 8 enters the lifting groove of the thread trimming cam 9 under the drive of the solenoid valve push rod 2, and the rack 13 and the transmission gear 11 are reciprocated through the lifting trajectory of the thread trimming cam 9, thereby driving the vertical shaft sleeve and the moving knife to perform synchronous reciprocating thread trimming action.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] (1) The utility model has a reasonable design and novel structure. The universal joint mechanism is used at both ends of the transmission connecting rod, which overcomes the impact defect in the rigid transmission of the original technology and ensures the stability of the work;

[0013] (2) The utility model reduces the parallel meshing distance between the central axis of the transmission gear and the rack, thereby significantly reducing the reduction of the lifting angle of the thread trimming cam, reducing the impact sound of the cam, and at the same time increasing the swing angle of the cold cutting moving knife, thereby meeting the short thread head cutting performance;

[0014] (3) The utility model is easy to debug and maintain, and is beneficial to extending the service life of parts;

[0015] In summary, the utility model not only improves the short-wire cold cutting and shearing transmission function by improving the structural design, but also overcomes the rigid transmission defects of the prior art on the shearing transmission, reduces the transmission noise, thereby ensuring the stability of the transmission and increasing the service life of the parts. [Drawings]

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] In the figure: 1, solenoid valve 2, solenoid valve push rod 3, lever joint 4, transmission connecting rod 501, universal joint head 5a, axial screw 1 502, universal joint head 2 5b, axial screw 2 6, lever 7, lever connecting seat 8, cam linkage shaft 9, thread trimming cam 10, reset tension spring 11, transmission gear 12, vertical shaft sleeve 13, rack 14, pressure plate 15, rack backing 16, short thread head thread trimming moving knife 17, transmission main shaft. [Specific implementation method]

[0018] As attached Figure 1 As shown, the utility model provides a short-thread trimming transmission mechanism for a high-platform roller car, comprising a solenoid valve 1, a head of a solenoid valve push rod 2 inside the solenoid valve 1 connected to a lever 6, a transmission connecting rod 4 is arranged on the right side of the solenoid valve 1, a head of the transmission connecting rod 4 is connected to a universal joint head 501, and is connected to the left end of the lever 6 through the universal joint head 501 and an axial screw 5a, a cam linkage shaft 8 is arranged in the middle of the lever 6, a lever connecting seat 7 is connected to the right end of the lever 6, a trimming cam 9 is arranged in the front of the middle of the lever 6, the trimming cam 9 is matched and connected with the cam linkage shaft 8, and the trimming cam 9 is fixedly connected to the transmission main shaft 17, a universal joint head 2 502 is connected to the rear of the transmission connecting rod 4, and is connected to the left end of the lever 6 through the universal joint head 2 ... 02 and the axial screw 25b are connected with the head of the rack 13, and a transmission gear 11 is provided on the right side of the middle part of the rack 13, and the transmission gear 11 is meshed with the rack 13. The transmission gear 11 is fixed to the outer circle of the vertical shaft sleeve 12, and the vertical shaft sleeve 12 is sleeved on the transmission main shaft 17. A short-thread head thread trimming movable knife 16 is installed at the front end of the head of the vertical shaft sleeve 12; a lifting groove is provided on the thread trimming cam 9, and is connected with the cam linkage shaft 8 through the lifting groove. The cam linkage shaft 8 enters the lifting groove of the thread trimming cam 9 under the drive of the solenoid valve push rod 2, and the rack 13 and the transmission gear 11 are reciprocated through the lifting trajectory of the thread trimming cam 9, thereby driving the vertical shaft sleeve and the movable knife to perform synchronous reciprocating thread trimming action.

[0019] Among them, a lever joint 3 is arranged between the head of the solenoid valve push rod 2 and the lever 6. The lever joint 3 is an L-shaped structure as a whole. One end of the lever joint 3 is connected to the solenoid valve push rod 2, and the other end of the lever joint 3 is connected to the inner side of the left end of the lever 6. The side connected to the lever 6 is in a downwardly bent V-shape, thereby further reducing the parallel meshing distance between the central axis of the transmission gear and the rack. A pressure plate 14 is arranged on the top of the rack 13, and a rack backer 15 is arranged on the left inner side of the rack 13. The pressure plate 14 is pressed on the rack 13 and the rack backer 15, thereby ensuring the stability of the transmission. It also includes a reset spring 10, the rear end of which is connected to the bottom plate of the roller car housing, and the head of the reset spring 10 is connected to the lever 6, so that the solenoid valve stops working after the thread cutting action is completed, and the reset spring can be used to realize the reset of the entire mechanism action, thereby reducing the time of the entire transmission process.

[0020] The utility model mainly includes a solenoid valve, a solenoid valve push rod, a lever joint, a transmission connecting rod, two universal joints, two axial screws, a lever, a lever connecting seat, a cam linkage shaft, a thread trimming cam, a reset tension spring, a vertical shaft transmission gear, a vertical shaft sleeve, a rack, a pressure plate, a rack backer and a moving knife. Two universal joints are arranged at both ends of the transmission connecting rod, the front end is fixed to the lever by an axial screw 1, and the rear end is connected to the front part of the rack by an axial screw 2. The transmission mode of the universal joint is adopted here, which overcomes the rigid transmission defect of the existing technology for the thread trimming transmission. The spacing between the parallel meshing lines of the central axis of the transmission gear and the rack is shortened by one-fourth of the spacing relative to the original technology, thereby ensuring that the transmission rise angle of the cam is reduced by two-fifths relative to the original thread trimming cam rise angle, achieving the stability of the work, and at the same time making the working swing angle of the thread trimming moving knife nearly doubled compared with the original technology, thereby meeting the working performance of the short thread head cold cutting moving knife.

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0022] As attached Figure 1 As shown, the short-thread trimming transmission mechanism of the high platform vehicle of the utility model includes a solenoid valve 1 arranged on the right side of the bottom surface of the housing flat plate, a solenoid valve push rod 2 is arranged inside the solenoid valve push rod 2, the head of which is close to a lever joint 3, the lever joint 3 is connected to the inner side of the left end of a lever 6, and the transmission connecting rod 4 is located on the right side of the solenoid valve 1. The head of the solenoid valve push rod 4 is connected to a universal joint head 501 and is connected to the left end of the lever 6 through an axial screw 5a. A cam linkage shaft 8 is provided in the middle of the lever 6, and a lever connecting seat 7 is provided at the right end of the lever 6 and is connected to the right end of the lever 6; the front of the middle of the lever 6 A thread trimming cam 9 is provided and fixed to the transmission main shaft. A universal joint head 502 is provided at the rear of the transmission connecting rod. Its head is connected to the head of a rack 13 through an axial screw 5b. The middle right side of the rack 13 is meshed with a transmission gear 11, and the transmission gear 11 is fixed to the outer circle of the vertical shaft sleeve 12; a pressure plate 14 is provided on the top of the rack 13, and a rack backer 15 is provided on the left inner side of the rack 13. A short-thread head thread trimming knife 16 is installed at the front end of the head of the vertical shaft sleeve 12. The rear end of the reset tension spring 10 is connected to the bottom plate and the head is connected to the lever 6.

[0023] The working principle of the utility model is as follows: when the main shaft stops rotating after sewing, the electronic control system sends a signal to the solenoid valve 1 to make the solenoid valve push rod 2 move forward, and the transmission is first realized through the transmission connecting rod 4. The lower end of the transmission connecting rod 4 is connected to the rack 13 by connecting a universal joint 2 502 and an axial screw 2 5b to realize forward propulsion, and the rack 13 is meshed with the vertical gear 11 and rotates clockwise. At this time, the transmission connecting rod 4 and the head universal joint 1 501 are connected to the lever 6 and are subject to the power of the solenoid valve push rod 2, so that the cam linkage shaft 8 quickly enters the lifting groove of the thread trimming cam 9 for operation, thereby forcing the rack 13 and the transmission gear 11 to move back and forth through the lifting trajectory of the thread trimming cam 9, and at the same time drives the vertical shaft sleeve 12 and the short thread head thread trimming knife 16 to perform a synchronous reciprocating thread trimming action; after the thread trimming action is completed, the solenoid valve 1 stops working, and the reset spring 10 realizes the reset of the entire mechanism action, and the entire transmission process can be used within 2 seconds.

[0024] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. The standard parts used can be purchased from the market, and special-shaped parts can be customized according to the records in the specification and drawings. The specific connection methods of each part adopt mature conventional means such as bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0025] The present invention is not limited to the above-mentioned implementation modes, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be considered as equivalent replacement modes and shall be included in the protection scope of the present invention.

Claims

1. A high-platform roller lathe short-thread cutting transmission mechanism, Features: The invention comprises a solenoid valve (1), wherein the head of a solenoid valve push rod (2) inside the solenoid valve (1) is connected to a lever (6), a transmission connecting rod (4) is arranged on the right side of the solenoid valve (1), the head of the transmission connecting rod (4) is connected to a universal joint head (501), and is connected to the left end of the lever (6) through the universal joint head (501) and an axial screw (5a), a cam linkage shaft (8) is arranged in the middle of the lever (6), the right end of the lever (6) is connected to a lever connecting seat (7), a thread trimming cam (9) is arranged in front of the middle of the lever (6), and the thread trimming cam (9) is connected to the cam linkage shaft (8) in cooperation with each other, and The thread trimming cam (9) is fixedly connected to the transmission main shaft (17); the rear part of the transmission connecting rod (4) is connected to the second universal joint head (502), and is connected to the head of the rack (13) through the second universal joint head (502) and the second axial screw (5b); a transmission gear (11) is provided on the right side of the middle part of the rack (13); the transmission gear (11) is meshed and connected with the rack (13); the transmission gear (11) is fixed to the outer circle of the vertical shaft sleeve (12); the vertical shaft sleeve (12) is sleeved on the transmission main shaft (17); and a short thread trimming movable knife (16) is installed at the front end of the head of the vertical shaft sleeve (12).

2. The short thread cutting transmission mechanism for a high roller lathe according to claim 1, Features: A lever joint (3) is provided between the head of the solenoid valve push rod (2) and the lever (6); the lever joint (3) is in an L-shaped structure as a whole; one end of the lever joint (3) is connected to the solenoid valve push rod (2); the other end of the lever joint (3) is connected to the inner side of the left end of the lever (6); and the side connected to the lever (6) is in a downwardly bent V-shape.

3. The short thread cutting transmission mechanism for a high roller lathe according to claim 1, Features: A pressure plate (14) is arranged on the top of the rack (13), a rack backer (15) is arranged on the left inner side of the rack (13), and the pressure plate (14) is pressed on the rack (13) and the rack backer (15).

4. The short thread cutting transmission mechanism for a high roller lathe according to claim 1, Features: It also includes a reset spring (10), the rear end of which is connected to the bottom plate of the roller car housing, and the head of which is connected to the lever (6).

5. The short thread cutting transmission mechanism of the high roller lathe according to any one of claims 1 to 4, Features: The thread trimming cam (9) is provided with a lifting groove and is connected to a cam linkage shaft (8) through the lifting groove. The cam linkage shaft (8) enters the lifting groove of the thread trimming cam (9) under the drive of the electromagnetic valve push rod (2), and causes the rack (13) and the transmission gear (11) to move back and forth through the lifting track of the thread trimming cam (9).

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