CN215829038U

CN215829038U - Needle bar lifting structure of sewing machine

Info

Publication number: CN215829038U
Application number: CN202122251972.6U
Authority: CN
Inventors: 陈添德; 杨代兵; 韦文武; 向本祥
Original assignee: Shenzhen Yano Technology Co ltd
Current assignee: Shenzhen Yano Technology Co ltd
Priority date: 2021-08-05
Filing date: 2021-09-16
Publication date: 2022-02-15
Anticipated expiration: 2031-09-16
Also published as: CN113668153A; CN113668153B

Abstract

The utility model belongs to the technical field of the technique of sewing machine and specifically relates to a needle bar elevation structure of sewing machine is related to, it includes the casing, casing internal rotation and lift have the needle bar, the bottom of needle bar is run through the casing, and extend to outside the chassis bottom, the casing internal rotation has the eccentric wheel, one side eccentric rotation of eccentric wheel is provided with the part of picking up thread, the part of picking up thread deviates from one side of eccentric wheel is provided with the rotor plate, the rotor plate is provided with and is used for driving the reciprocating lifting's of needle bar elevating system. This application has the effect that improves the efficiency of sewing.

Description

Needle bar lifting structure of sewing machine

Technical Field

The application relates to the technical field of sewing machines, in particular to a needle rod lifting structure of a sewing machine.

Background

A sewing machine is a machine that uses one or more sewing threads to form one or more stitches in a material to be sewn, thereby interweaving or stitching one or more layers of material. The sewing machine can sew fabrics such as cotton, hemp, silk, wool, artificial fiber and the like and products such as leather, plastic, paper and the like, and the sewed stitches are neat, beautiful, flat and firm, the sewing speed is high, and the use is simple and convenient. And derives the artistic forms of hand-push embroidery, computer embroidery, etc.

Current sewing machine includes the casing, and the casing internal rotation has the needle bar with going up and down, and the bottom of needle bar runs through the casing to outside extending to the bottom of casing, and be provided with respectively in the casing and be used for driving needle bar pivoted slewing mechanism, and be used for driving the elevating system that the needle bar goes up and down, the swing is provided with the take-up component in the casing, and the take-up component is used for carrying, retrieves the needle line and tightens up the stitch seam, and the casing is provided with and is used for driving the wobbling swing subassembly of take-up component. When the sewing machine works, a worker firstly adjusts the thread take-up component through the swinging component so as to enable the swinging of the thread take-up component to be synchronous with the lifting of the needle rod, and finally, the sewing machine sews the cloth through the needle rod which rotates and lifts.

In view of the above-mentioned related art, the inventors have considered that when sewing is required, the operation steps thereof requiring adjustment of the swing of the thread take-up member to be synchronized with the raising and lowering of the needle bar are not only cumbersome, but also affect the efficiency of sewing.

SUMMERY OF THE UTILITY MODEL

In order to improve the efficiency of sewing, this application provides a needle bar elevation structure of sewing machine.

The application provides a pair of sewing machine's needle bar elevation structure adopts following technical scheme:

the utility model provides a sewing machine's needle bar elevation structure, includes the casing, casing internal rotation and lift have the needle bar, the bottom of needle bar runs through the casing, and extend to outside the chassis bottom, the casing internal rotation has the eccentric wheel, one side eccentric rotation of eccentric wheel is provided with the take-up component, the take-up component deviates from one side of eccentric wheel is provided with the rotor plate, the rotor plate is provided with and is used for driving the reciprocating elevating system who goes up and down of needle bar.

Through adopting above-mentioned technical scheme, when the eccentric wheel rotated, the eccentric wheel drove take-up component and rotor plate eccentric rotation, and the rotor plate passes through elevating system and drives the needle bar lift simultaneously, and in this structure, in the needle bar pivoted, no longer need adjust the synchronous of take-up component and needle bar lift, and then be favorable to improving the efficiency of sewing.

Optionally, the lifting mechanism comprises a connecting rod, one end of the connecting rod is rotatably connected with one side of the rotating piece, which deviates from the thread take-up component, the other end of the connecting rod is rotatably provided with a connecting seat, the bottom of the connecting seat is provided with a connecting plate, the top end of the needle rod is rotatably connected with the connecting plate, and the machine shell is provided with a guide assembly which is used for being matched with and driving the needle rod to lift.

Through adopting above-mentioned technical scheme, when the eccentric wheel drove the eccentric rotation of rotor plate, under the effect of direction subassembly, the rotor plate passes through the connecting rod and drives the reciprocal lift of connecting seat, and the connecting seat drives the reciprocal lift of needle bar through the connecting plate, and then is favorable to improving the reciprocal stability that goes up and down of needle bar.

Optionally, the guide assembly includes a guide rail and a guide slider, the guide rail is disposed in the housing, the guide slider is disposed on one side of the connecting plate, and the guide slider is slidably connected to the guide rail.

Through adopting above-mentioned technical scheme, when the rotor plate passes through the connecting rod and drives the reciprocal lift of connecting seat, the connecting seat drives the length direction slip of direction slider along the guided way through the connecting plate simultaneously, and under the guide effect of guided way, the connecting plate drives the reciprocal lift of needle bar this moment, and then is favorable to improving the reciprocal stability that goes up and down of needle bar.

Optionally, the thread take-up component comprises a thread take-up lever, the thread take-up lever is arranged on one side of the eccentric wheel in a swinging mode, a thread inlet hole penetrates through the top of the needle rod, and the thread inlet hole is arranged below the thread take-up lever.

By adopting the technical scheme, the thread inlet hole is arranged below the thread take-up lever, and the thread quantity from the thread passing hole of the thread take-up lever to the machine needle thread passing hole at the bottom of the needle rod is close to the standard thread quantity of a flat sewing machine, so that wrinkling, thread throwing, standard stitch and attractive appearance are avoided during sewing.

Optionally, a bearing is arranged at the top of the connecting plate, and the needle rod is rotatably connected with the connecting plate through the bearing.

Through adopting above-mentioned technical scheme, when the reciprocal lift of connecting plate, the connecting plate passes through the bearing and drives the reciprocal lift of needle bar, and when the needle bar rotated, the needle bar passed through the bearing and rotates with the connecting plate relatively, and then was favorable to improving the stability that the needle bar rotated and goes up and down.

Optionally, the casing is provided with and is used for driving eccentric wheel pivoted runner assembly, runner assembly includes motor, action wheel, follows driving wheel and hold-in range, the casing internal rotation is provided with the axis of rotation, the one end of axis of rotation with the eccentric wheel is connected, the motor set up in the top of casing, the output shaft of motor with the action wheel is connected, locate from the driving wheel cover the axis of rotation, the action wheel passes through the hold-in range with connect from the driving wheel transmission.

Through adopting above-mentioned technical scheme, when the motor starts, the output shaft drive action wheel of motor rotates, and the action wheel passes through the hold-in range and drives from the driving wheel rotation, drives the eccentric wheel rotation through the axis of rotation from the driving wheel, and then is favorable to improving eccentric wheel pivoted stability.

Optionally, one side of connecting rod is provided with the linoleum box, the top of linoleum box is uncovered setting, the inlet port has been seted up to bottom one side of connecting plate, the linoleum box is provided with and is convenient for percolate the oil and arrive infiltration piece in the inlet port.

Through adopting above-mentioned technical scheme, when the life is longer back, the hookup location department of connecting rod and connecting seat produces abnormal sound or wearing and tearing because of the friction easily, when the abnormal sound is eliminated to needs, in adding the linoleum box with appropriate amount of oil earlier, the oil in the linoleum box permeates the oil inlet through oozing the worry piece this moment in, under the lubricated effect of oil, has improved connecting rod and connecting seat pivoted smoothness nature each other, and then finally is favorable to improving the smooth and easy nature of the reciprocal lift of needle bar.

Optionally, the infiltration piece is an oil guide line, one end of the oil guide line is communicated with the bottom of the asphalt felt box, the other end of the oil guide line is inserted into the oil inlet hole, and the connecting rod is provided with an oil line pressing plate.

Through adopting above-mentioned technical scheme, the wick clamp plate is convenient for be fixed in one side of connecting rod with the wick, and after the full oil in the asphalt felt box, under the effect of leading the wick, the oil in the asphalt felt box permeates through the wick and arrives in the oil feed hole, and then is favorable to improving the stability of lubricated connecting rod and the junction of connecting seat.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the eccentric wheel rotates, the eccentric wheel drives the thread taking-up component and the rotating sheet to eccentrically rotate, and the rotating sheet drives the needle rod to lift through the lifting mechanism.

2. The thread inlet hole at the top end of the needle rod is arranged below the thread take-up lever, and the thread amount from the thread passing hole of the thread take-up lever to the machine needle thread passing hole at the bottom of the needle rod is close to the standard thread amount of a flat sewing machine, so that no wrinkle, no thread throwing, standard stitch and attractive appearance are realized during sewing.

Drawings

Fig. 1 is a schematic view of the overall structure of a needle bar lifting structure of a sewing machine of the present application.

Fig. 2 is a schematic view of the entire structure of the rotating assembly and the lifting mechanism of the present application.

Fig. 3 is a schematic view of the overall structure of the lifting mechanism of the present application.

Description of reference numerals: 1. a housing; 11. a rotating shaft; 2. a needle bar; 21. a wire inlet hole; 3. an eccentric wheel; 4. a thread take-up member; 41. a rotating sheet; 42. a take-up lever; 5. a motor; 51. a driving wheel; 52. a driven wheel; 53. a synchronous belt; 6. a connecting rod; 61. a connecting seat; 62. a connecting plate; 63. a bearing; 64. an oil inlet hole; 7. a guide rail; 71. a guide slider; 8. a linoleum box; 9. and (5) pressing the oil line.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

Example (b):

referring to fig. 1 and 2, a needle bar lifting structure of a sewing machine includes a housing 1 fixed to a head of the sewing machine. The needle bar 2 is rotated and lifted in the machine shell 1, the needle bar 2 is vertically arranged, the bottom end of the needle bar 2 penetrates through the machine shell 1 and extends out of the bottom of the machine shell 1, and the bottom end of the needle bar 2 is used for sewing. An eccentric wheel 3 rotates in the machine shell 1, a thread taking-up component 4 rotates on one side of the eccentric wheel 3, and the thread taking-up component 4 is positioned at the eccentric position of the eccentric wheel 3. The thread take-up member 4 plays a role of feeding, recovering a needle thread and tightening a stitch in a process of forming the stitch when used for sewing. The side of the thread take-up component 4 departing from the eccentric wheel 3 is rotated with a rotating sheet 41, and the rotating sheet 41 is provided with a lifting mechanism for driving the needle bar 2 to reciprocate.

Referring to fig. 2, in order to improve the stability of the eccentric wheel 3 rotating in the casing 1, the casing 1 is provided with a rotating assembly including a motor 5, a driving wheel 51, a driven wheel 52 and a timing belt 53. The rotating shaft 11 is arranged in the casing 1 in a rotating mode, the rotating shaft 11 is arranged horizontally, one end of the rotating shaft 11 is rotatably connected with the inner wall of the casing 1, and the other end of the rotating shaft 11 is coaxially and fixedly connected with the eccentric wheel 3. The motor 5 is fixed on the top of the casing 1, the driving wheel 51 is arranged on the top of the casing 1, the driving wheel 51 is coaxially and fixedly connected with an output shaft of the motor 5, the driven wheel 52 is fixedly sleeved on one end of the rotating shaft 11, and the driven wheel 52 is in transmission connection with the driving wheel 51 through a synchronous belt 53.

When the motor 5 is started, the output shaft of the motor 5 drives the driving wheel 51 to rotate, the driving wheel 51 drives the driven wheel 52 to rotate through the synchronous belt 53, and the driven wheel 52 drives the eccentric wheel 3 to rotate through the rotating shaft 11.

In particular, with reference to fig. 3, the lifting mechanism comprises a connecting rod 6. The connecting rod 6 is arranged on one side of the rotating sheet 41, which is far away from the eccentric wheel 3, one end of the connecting rod 6 is rotatably connected with the rotating sheet 41, and the other end of the connecting rod 6 is a free end. The free end of the connecting rod 6 is rotatably provided with a connecting seat 61, and the bottom of the connecting seat 61 is fixed with a connecting plate 62. The top end of the needle bar 2 penetrates through the connecting plate 62 and is rotatably connected with the connecting plate 62, and the machine shell 1 is provided with a guide assembly which is used for driving the needle bar 2 to reciprocate.

In particular, with reference to fig. 3, the guide assembly comprises a guide rail 7 and a guide slider 71. The guide rail 7 is vertically arranged, and the guide rail 7 is fixed on the inner wall of the machine shell 1. The guide slider 71 is fixed on one side of the connecting plate 62 facing the guide rail 7, and the guide slider 71 slides on the guide rail 7.

When the eccentric wheel 3 rotates, the eccentric wheel 3 drives the rotating piece 41 to rotate through the thread taking-up component 4, under the action of the guide rail 7, the rotating piece 41 drives the connecting seat 61 to reciprocate through the connecting rod 6, the connecting seat 61 drives the needle rod 2 to reciprocate through the connecting plate 62, and the guide slide block 71 is driven to slide along the guide rail 7 through the connecting seat 61 through the connecting plate 62.

It should be noted that, referring to fig. 3, in order to improve the stability of the rotation of the needle bar 2 and the connecting plate 62, a bearing 63 is fixed on the top of the connecting plate 62, and the top end of the needle bar 2 penetrates through the bearing 63 and is rotatably connected with the connecting plate 62 through the bearing 63. When the connecting plate 62 is lifted and lowered reciprocally, the connecting plate 62 simultaneously drives the needle bar 2 to lift and lower reciprocally through the bearing 63.

The needle bar 2 can rotate in various ways, such as a transmission connection of a synchronous belt or a transmission connection of a gear, etc., in this embodiment, the needle bar 2 rotates in a synchronous belt transmission connection, and the needle bar 2 rotates relative to the connecting plate 62 through a bearing 63.

It is worth mentioning that referring to fig. 3, in order to ensure no wrinkle, no thread throwing, standard stitch and good appearance during sewing, the top of the needle bar 2 is penetrated with a thread inlet 21, the thread take-up component 4 comprises a thread take-up lever 42, the thread take-up lever 42 swings at one side of the eccentric wheel 3, the thread inlet 21 at the top end of the needle bar 2 is arranged below the thread take-up lever 42, and the thread amount from the thread take-up lever 42 to the bottom end of the needle bar 2 is close to the standard thread amount of the flat sewing machine.

Referring to fig. 3, after the connecting rod 6 is used for a long time, abnormal noise or abrasion is easily generated at the connecting position of the connecting rod 6 and the connecting seat 61 due to friction, and in order to eliminate the abnormal noise, a felt box 8 is fixed on one side of the connecting rod 6, which is far away from the eccentric wheel 3. The top of felt box 8 is uncovered setting, and the staff accessible is uncovered adding lubricating oil in the felt box 8. An oil inlet 64 is formed in the side wall of the free end of the connecting rod 6, the oil inlet 64 is communicated with the connecting position of the connecting rod 6 and the connecting seat 61, and the felt box 8 is provided with a seepage part which is convenient for infiltrating lubricating oil to the connecting position.

Specifically, referring to fig. 3, the filter is an oil guide line (not shown), the oil guide line is disposed at the bottom of the linoleum box 8, one end of the oil guide line is communicated with the bottom of the linoleum box 8, and the other end of the oil guide line is inserted into the oil inlet 64. When the felt box 8 is filled with lubricating oil, the lubricating oil is percolated into the oil inlet hole 64 through the oil guide line, so that the joint of the connecting rod 6 and the connecting seat 61 is lubricated.

It is worth mentioning that, referring to fig. 3, in order to fix the oil guide line, the side wall of the connecting rod 6 is fixed with an oil line pressing plate 9.

The working principle of a needle bar lifting structure of a sewing machine is as follows:

when needing to sew, the staff first starts motor 5, and the output shaft of motor 5 drives action wheel 51 and rotates, and action wheel 51 moves through hold-in range 53 and finally drives eccentric wheel 3 and rotates. The eccentric wheel 3 drives the take-up lever 42 to swing and take-up the thread in a reciprocating way, and the eccentric wheel 3 drives the rotating piece 41 to rotate eccentrically. Under the action of the guide rail 7, the rotating sheet 41 is reciprocally lifted through the connecting rod 6 and the connecting seat 61, and the connecting seat 61 drives the needle bar 2 to reciprocally lift through the connecting rod. At this time, the swing of the thread take-up lever 42 and the reciprocating lift of the needle bar 2 are performed synchronously without manual adjustment, thereby facilitating the sewing efficiency.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a needle bar elevation structure of sewing machine which characterized in that: including casing (1), casing (1) internal rotation and lift have needle bar (2), the bottom of needle bar (2) is run through casing (1), and extend to outside casing (1) bottom, casing (1) internal rotation has eccentric wheel (3), one side eccentric rotation of eccentric wheel (3) is provided with take-up component (4), take-up component (4) deviate from one side of eccentric wheel (3) is provided with rotor plate (41), rotor plate (41) are provided with and are used for driving the reciprocating lift's of needle bar (2) elevating system.

2. A needle bar lifting structure of a sewing machine according to claim 1, characterized in that: elevating system includes connecting rod (6), the one end of connecting rod (6) with rotor plate (41) deviates from one side of taking-up component (4) is rotated and is connected, the other end of connecting rod (6) is rotated and is set up connecting seat (61), the bottom of connecting seat (61) is provided with connecting plate (62), the top of needle bar (2) with connecting plate (62) are rotated and are connected, casing (1) is provided with and is used for the cooperation to drive the direction subassembly that needle bar (2) go up and down.

3. A needle bar lifting structure of a sewing machine according to claim 2, wherein: the guide assembly comprises a guide rail (7) and a guide sliding block (71), the guide rail (7) is arranged in the machine shell (1), the guide sliding block (71) is arranged on one side of the connecting plate (62), and the guide sliding block (71) is in sliding connection with the guide rail (7).

4. A needle bar lifting structure of a sewing machine according to claim 1, characterized in that: the thread take-up component (4) comprises a thread take-up lever (42), the thread take-up lever (42) is arranged on one side of the eccentric wheel (3) in a swinging mode, a thread inlet hole (21) penetrates through the top of the needle rod (2), and the thread inlet hole (21) is arranged below the thread take-up lever (42).

5. A needle bar lifting structure of a sewing machine according to claim 2, wherein: the top of the connecting plate (62) is provided with a bearing (63), and the needle rod (2) is rotatably connected with the connecting plate (62) through the bearing (63).

6. A needle bar lifting structure of a sewing machine according to claim 1, characterized in that: casing (1) is provided with and is used for driving eccentric wheel (3) pivoted runner assembly, runner assembly includes motor (5), action wheel (51), follows driving wheel (52) and hold-in range (53), casing (1) internal rotation is provided with axis of rotation (11), the one end of axis of rotation (11) with eccentric wheel (3) are connected, motor (5) set up in the top of casing (1), the output shaft of motor (5) with action wheel (51) are connected, locate from driving wheel (52) cover axis of rotation (11), action wheel (51) pass through hold-in range (53) with connect from driving wheel (52) transmission.

7. A needle bar lifting structure of a sewing machine according to claim 2, wherein: one side of connecting rod (6) is provided with linoleum box (8), the top of linoleum box (8) is uncovered setting, inlet port (64) have been seted up to bottom one side of connecting plate (62), linoleum box (8) are provided with and are convenient for percolate the oil and expect the piece in inlet port (64).

8. A needle bar lifting structure of a sewing machine according to claim 7, wherein: the infiltration piece is a wick, one end of the wick is communicated with the bottom of the felt box (8), the other end of the wick is inserted into the oil inlet hole (64), and the connecting rod (6) is provided with a wick pressing plate (9).