CN207958692U

CN207958692U - A kind of needle bar crank

Info

Publication number: CN207958692U
Application number: CN201820300535.4U
Authority: CN
Inventors: 王俊逸; 王志强
Original assignee: Suzhou Strong Yi Machinery Co Ltd
Current assignee: Suzhou Strong Yi Machinery Co Ltd
Priority date: 2018-03-05
Filing date: 2018-03-05
Publication date: 2018-10-12
Anticipated expiration: 2028-03-05

Abstract

The utility model discloses a kind of needle bar cranks, including upper axis, second bearing, shank and casing, the upper axis is the cylindrical structure being horizontally arranged, the upper axis upper left side end is rotatablely connected first bearing, upper axis right-hand end is rotatablely connected second bearing, crank is welded in the second bearing, crank is S-shaped shape structure, it is welded and fixed with upper axis in the middle part of described sleeve pipe outer left side, first copper sheathing and the second copper sheathing are respectively set up and down on the outside of described sleeve pipe, the shank is placed on inside pipe casing, weld needle guard in the shank bottom end, sliding slot is opened up on the left of described sleeve pipe, sliding block is set inside sliding slot.The needle bar crank improves the puncture force of shank, improves the thick material adaptability of sewing machine.

Description

A kind of needle bar crank

Technical field

The utility model belongs to sewing machine technique field, and in particular to a kind of needle bar crank.

Background technology

Sewing machine is formed one or more stitchings on sewing, is made one or more layers seam with one or more sewing thread The machine that material interweaves or unites by a seam.Fabrics and leather, plastics, the paper such as function of sewing sewing cotton, fiber crops, silk, hair, staple fibre Equal products, the stitching neat appearance stitched out, it is smooth securely, sewing velocity is fast, uses simplicity.And hand push is derived with it and embroiders computer The art forms such as embroidery.It when initial stage, is substantially all as single needle, hand-rail type sewing machine, had invented electrically driven (operated) sewing machine later, one The straight mainstream become in the market.It is divided by its mechanism and stitching form, then can substantially be summarized as JA types, JB types, JG types, JH Type.Figure below is one kind --- the JG type domestic electronic multi-purpose sewing machines of domestic sewing machine.Major part in industrial sewing machines General sewing machine is belonged to, including flat seam machine, chain seam machine, quilter, overedger and flat seaming machine etc., and the use of flat seam machine Rate highest.

The puncture force that needle bar crank on current sewing machine is brought is not strong enough.Only single needle is sewed, and efficiency is low.

Utility model content

The purpose of this utility model is to provide a kind of needle bar cranks, to solve the problems mentioned in the above background technology.

To achieve the above object, the utility model provides the following technical solutions：A kind of needle bar crank, including upper axis, second Bearing, shank and casing, the upper axis are the cylindrical structure being horizontally arranged, and the upper axis upper left side end is rotatablely connected first axle It holds, upper axis right-hand end is rotatablely connected second bearing, and crank is welded in the second bearing, and crank is S-shaped shape structure, described sleeve pipe It is welded and fixed with upper axis in the middle part of outer left side, the first copper sheathing and the second copper sheathing, the shank is respectively set up and down on the outside of described sleeve pipe It is placed on inside pipe casing, needle guard is welded in the shank bottom end, and sliding slot is opened up on the left of described sleeve pipe, sliding block is arranged inside sliding slot.

Preferably, the sliding slot opened up on the left of described sleeve pipe is internally provided with spring, and sliding block, spring is arranged in sliding slot inner upper It is arranged below sliding block, one end and the shank of sliding block are welded and fixed.

Preferably, the pin hole of three groups of same sizes is offered on the needle guard, can be placed vertically by pin hole below needle guard Three groups of needles.

Preferably, the material of sliding block and shank is copper, and the material of casing is aluminium.

Preferably, second copper sheathing can be such that the second copper sheathing carries out elastic by bolt.

The technique effect and advantage of the utility model：The needle bar crank, sliding block lower section are provided with spring, sliding by spring Block can bounce again when being depressed by crank, to being moved repeatedly up and down, the downward active force of sliding block by crank come It directly transmits, so as to provide larger shank puncture force, three groups of pin holes, Ke Yiti is provided on the needle guard of shank bottom end setting The efficiency of high sewing machine, the needle bar crank improve the puncture force of shank, improve the thick material adaptability of sewing machine.

Description of the drawings

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the sleeve structure schematic diagram of the utility model；

Fig. 3 is the second copper sheathing structural schematic diagram of the utility model；

Fig. 4 is the second bearing structural schematic diagram of the utility model；

Fig. 5 is the needle guard structural schematic diagram of the utility model.

In figure：Axis on 1,2 first bearings, 3 second bearings, 4 cranks, 5 casings, 6 first copper sheathings, 7 second copper sheathings, 8 needle guards, 9 needles, 10 sliding blocks, 11 springs, 12 pin holes, 13 shanks, 14 sliding slots, 15 bolts.

Specific implementation mode

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work The every other embodiment obtained, shall fall within the protection scope of the present invention.

The utility model provides a kind of needle bar crank as shown in Figs. 1-5, including upper axis 1, second bearing 3, shank 13 With casing 5, the upper axis 1 is the cylindrical structure being horizontally arranged, and 1 upper left side end of the upper axis is rotatablely connected first bearing 2, on 1 right-hand end of axis is rotatablely connected second bearing 3, and crank 4 is welded in the second bearing 3, and crank 4 is S-shaped shape structure, described sleeve pipe It is welded and fixed with upper axis 1 in the middle part of 5 outer left sides, the first copper sheathing 6 and the second copper sheathing 7 is respectively arranged in 5 outside of described sleeve pipe up and down, described Shank 13 is placed on inside casing 5, and needle guard 8 is welded in 13 bottom end of the shank, and 5 left side of described sleeve pipe opens up sliding slot 14, sliding slot 14 Inside setting sliding block 10.

Specifically, the sliding slot 14 that 5 left side of described sleeve pipe opens up is internally provided with spring 11, the setting of 14 inner upper of sliding slot is slided Block 10, spring 11 are arranged below sliding block 10, and one end and the shank 13 of sliding block 10 are welded and fixed.

Specifically, offering the pin hole 12 of three groups of same sizes on the needle guard 8,8 lower section of needle guard can be erected by pin hole 12 Directly place three groups of needles 9.

Specifically, the material of sliding block 10 and shank 13 is copper, the material of casing 5 is aluminium.

Specifically, that the second copper sheathing 7 can be made to carry out by bolt 15 is elastic for second copper sheathing 7.

Specifically, the needle bar crank, when in use, casing 5 are mounted on by being welded and fixed on upper axis 1,2 He of first bearing Second bearing 3 is rotatablely connected with upper axis 1, and crank 4 is welded on 7 right side of second bearing, and when second bearing 7 rotates, crank 4 is therewith It rotates, the part that the sliding block 10 inside 5 upper hopper chute 14 of casing stretches out is moved up and down by crank 4, the setting of 10 bottom of sliding block There is spring 11, by spring 11, sliding block 10 can bounce again when being depressed by crank 4, sliding to be moved repeatedly up and down Block 10 is fixedly connected by welding with shank 13, and when sliding block 10 is moved up and down, shank 10 moves up and down therewith, in turn Needle 9 is set to move up and down, casing 5 carries out elastic fixation by the second copper sheathing 7, which improves the puncture of shank Power improves the thick material adaptability of sewing machine.

Finally it should be noted that：The above descriptions are merely preferred embodiments of the present invention, is not limited to this Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art For, it still can be with technical scheme described in the above embodiments is modified, or to which part technical characteristic Equivalent replacement is carried out, within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on, It should be included within the scope of protection of this utility model.

Claims

1. a kind of needle bar crank, including upper axis (1), second bearing (3), shank (13) and casing (5), it is characterised in that：It is described Upper axis (1) is the cylindrical structure being horizontally arranged, upper axis (1) the upper left side end rotation connection first bearing (2), upper axis (1) Right-hand end is rotatablely connected second bearing (3), and crank (4) is welded on the second bearing (3), and crank (4) is S-shaped shape structure, institute State and be welded and fixed with upper axis (1) in the middle part of casing (5) outer left side, be respectively arranged up and down on the outside of described sleeve pipe (5) the first copper sheathing (6) and Second copper sheathing (7), the shank (13) are placed on casing (5) inside, shank (13) the bottom end welding needle guard (8), the set Sliding slot (14) is opened up on the left of pipe (5), and sliding block (10) is set inside sliding slot (14).

2. a kind of needle bar crank according to claim 1, it is characterised in that：The sliding slot opened up on the left of described sleeve pipe (5) (14) it is internally provided with spring (11), sliding block (10) is arranged in sliding slot (14) inner upper, and spring (11) is arranged under sliding block (10) Side, one end and the shank (13) of sliding block (10) are welded and fixed.

3. a kind of needle bar crank according to claim 1, it is characterised in that：Offered on the needle guard (8) three groups it is identical The pin hole (12) of size, needle guard (8) lower section can place three groups of needles (9) vertically by pin hole (12).

4. a kind of needle bar crank according to claim 1, it is characterised in that：The material of sliding block (10) and shank (13) is The material of copper, casing (5) is aluminium.

5. a kind of needle bar crank according to claim 1, it is characterised in that：Second copper sheathing (7) can pass through bolt (15) the second copper sheathing (7) is made to carry out elastic.