The adjustable mechanism of a kind of flat seaming machine needle bar stroke
Technical field
The utility model belongs to technical field of sewing equipment, relates to a kind of flat seaming machine, the adjustable mechanism of particularly a kind of flat seaming machine needle bar stroke.
Background technology
The mechanism of the needle bar stroke of existing control flat seaming machine mostly is such, comprise the shank, connecting rod, needle bar crank and the main shaft that are arranged on the Flat Seaming Machine Head, main shaft is arranged on the flat seaming machine fuselage, one end links to each other with needle bar crank, the other end links to each other with motor, and connecting rod one end links to each other with needle bar crank, and the other end links to each other with shank, the end of connecting rod also links to each other with a slide block, and slide block is arranged in the groove of a take-up housing.By the rotation of driven by motor main shaft, the rotation of main shaft drives needle bar crank again and rotates, and crank rotates drivening rod along with slide block moves up and down in groove, and owing to connecting rod links to each other with shank, thereby the realization shank is done the motion of vertical direction.
Needle bar stroke is meant that the shank in the vertical direction is raised to peak and drops to displacement between the minimum point, and by above-mentioned mechanism as can be seen the shank in the vertical direction be raised to peak and drop to these 2 of minimum points and can't change, that is to say that needle bar stroke cannot regulate.Flat seaming machine is in the use of reality, and the thickness of the cloth of sewing is inequality, and the needle bar stroke of flat seaming machine be with the sewing cloth thickness be closely bound up, therefore, the sewing different-thickness cloth the time can bring bigger trouble to flat seaming machine.
Summary of the invention
The purpose of this utility model is to have the problems referred to above at existing technology, has proposed the adjustable mechanism of a kind of flat seaming machine needle bar stroke simple in structure, the metering needle throw of lever arbitrarily.
The purpose of this utility model can realize by following technical proposal: the adjustable mechanism of a kind of flat seaming machine needle bar stroke, comprise the shank that is arranged on the Flat Seaming Machine Head, be connected in the shank take-up housing on the flat seaming machine fuselage, connecting rod, main shaft and needle bar crank, described small end links to each other with main shaft by needle bar crank, described shank take-up housing has the groove that extends up and down, in the groove of shank take-up housing, also be provided with the shank slide block, and described shank slide block is connected mutually with the connecting rod lower end, it is characterized in that, described connecting rod lower end links to each other with shank, also is provided with between described small end and the main shaft to adjust the adjustment structure of distance between center line between the two.
The adjustable mechanism of this flat seaming machine needle bar stroke is adjustable in order to realize needle bar stroke.The operation principle that shank moves up and down is such, main shaft rotates, drive the rotation of needle bar crank again, the rotation of needle bar crank drives the shank slide block by connecting rod and moves up and down along the shank take-up housing, because shank links to each other with the shank slide block by the connecting rod lower end, therefore, shank is also along with moving up and down.Needle bar stroke is meant that the shank in the vertical direction is raised to peak and drops to displacement between the minimum point, and this needle bar stroke be with small end and main shaft between distance between center line be relevant.In the adjustable mechanism of this flat seaming machine needle bar stroke, increased an adjustment structure, under the effect of adjustment structure, can regulate the distance between center line between small end and the main shaft, thereby realize regulating of needle bar stroke.
In the above-mentioned adjustable mechanism of flat seaming machine needle bar stroke, described adjustment structure is a cam pin pole crank pin, and described cam pin pole crank pin one end links to each other with small end, and the other end links to each other with needle bar crank.Adjustment structure is a cam pin pole crank pin, and the center line that is to say the joint pin at cam pin pole crank pin two ends is not on same straight line, realizes regulating of needle bar stroke by such structure.
In the above-mentioned adjustable mechanism of flat seaming machine needle bar stroke, described needle bar crank has the stopper one that is fan-shaped, and described cam pin pole crank pin also has the stopper two that is fan-shaped.
In the above-mentioned adjustable mechanism of flat seaming machine needle bar stroke, described needle bar crank has connecting hole, and above-mentioned cam pin pole crank pin is located in this connecting hole, and both are connected mutually by screw.By such structure, needle bar crank and cam pin pole crank pin are fixed together.
As another situation, in the above-mentioned adjustable mechanism of flat seaming machine needle bar stroke, described needle bar crank has connecting hole, and above-mentioned cam pin pole crank pin is connected in this connecting hole by the mode that is threaded.
In the above-mentioned adjustable mechanism of flat seaming machine needle bar stroke, link to each other by screw between described cam pin pole crank pin and the connecting rod.
In the above-mentioned adjustable mechanism of flat seaming machine needle bar stroke, described small end and connecting rod lower end and have the installing hole that is connected all in a tubular form.
In the above-mentioned adjustable mechanism of flat seaming machine needle bar stroke, described shank slide block has connecting through hole.Make things convenient for the shank slide block to link to each other by this connecting through hole with shank.
In the above-mentioned adjustable mechanism of flat seaming machine needle bar stroke, be connected mutually by connecting rod between described shank and the connecting rod, described connecting rod one end is fixed on the shank by the shank joint, and the installing hole that the other end passes the connecting rod lower end acts in the connecting through hole of shank slide block.One end of connecting rod is fixed on the shank, and the other end passes the installing hole of connecting rod lower end, in leading to through the connection of shank slide block, like this shank, connecting rod and shank slide block three is linked together.
Compared with prior art, the adjustable mechanism of this flat seaming machine needle bar stroke realizes regulating of needle bar stroke by increasing a cam pin pole crank pin.Such project organization is simple, makes the range of application of this flat seaming machine wider, increases economic efficiency.
Description of drawings
Fig. 1 is the perspective view of the adjustable mechanism of this flat seaming machine needle bar stroke.
Fig. 2 is the perspective view of flat seaming machine.
Fig. 3 is the partial structurtes schematic diagram of the adjustable mechanism of this flat seaming machine needle bar stroke.
Fig. 4 is the partial structurtes schematic diagram of another situation of the adjustable mechanism of this flat seaming machine needle bar stroke.
Fig. 5 is the structural representation of the cam pin pole crank pin of the adjustable mechanism of this flat seaming machine needle bar stroke.
Among the figure, 1, shank; 2, connecting rod; 2a, small end; 2b, connecting rod lower end; 2c, installing hole; 3, needle bar crank; 3a, connecting hole; 3b, stopper one; 4, main shaft; 5, cam pin pole crank pin; 5a, joint pin one; 5b, joint pin two; 5c, stopper two; 6, screw; 7, shank take-up housing; 7a, groove; 8, shank slide block; 8a, connecting through hole; 9, connecting rod; 10, shank joint; 11, Flat Seaming Machine Head; 12, flat seaming machine fuselage.
The specific embodiment
Below be specific embodiment of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiment.
As depicted in figs. 1 and 2, the adjustable mechanism of this flat seaming machine needle bar stroke, comprise the shank 1 that is arranged on the Flat Seaming Machine Head 11, be connected in the shank take-up housing 7 on the flat seaming machine fuselage 12, connecting rod 2, main shaft 4 and needle bar crank 3, described small end 2a links to each other with main shaft 4 by needle bar crank 3, described shank take-up housing 7 has the groove 7a that extends up and down, in the groove 7a of shank take-up housing 7, also be provided with shank slide block 8, and described shank slide block 8 is connected mutually with connecting rod lower end 2b, described connecting rod lower end 2b links to each other with shank 1, also is provided with between described small end 2a and the main shaft 4 and can adjusts the adjustment structure of distance between center line between the two.
Particularly, adjustment structure is a cam pin pole crank pin 5, and described cam pin pole crank pin 5 one ends link to each other with small end 2a, and the other end links to each other with needle bar crank 3.Described needle bar crank 3 has stopper one 3b that is fan-shaped, and described cam pin pole crank pin 5 also has stopper two 5c that are fan-shaped.
In the adjustable mechanism of this flat seaming machine needle bar stroke, described needle bar crank 3 has connecting hole 3a, and above-mentioned cam pin pole crank pin 5 is located among this connecting hole 3a, and both are connected mutually by screw.By such structure, needle bar crank 3 and cam pin pole crank pin 5 are fixed together.
Certainly, other connected mode is arranged also, needle bar crank 3 as described has connecting hole 3a, and above-mentioned cam pin pole crank pin 5 is connected among this connecting hole 3a by the mode that is threaded.Link to each other by screw 6 between cam pin pole crank pin 5 and the connecting rod 2.Described small end 2a and connecting rod lower end 2b and have the installing hole 2c that is connected all in a tubular form.
Shank slide block 8 has connecting through hole 8a.Make things convenient for shank slide block 8 to link to each other by this connecting through hole 8a with shank 1.
Be connected mutually by connecting rod 9 between shank 1 and the connecting rod 2, described connecting rod 9 one ends are fixed on the shank 1 by shank joint 10, and the installing hole 2c that the other end passes connecting rod lower end 2b acts among the connecting through hole 8a of shank slide block 8.One end of connecting rod 9 is fixed on the shank 1, and the other end passes the installing hole 2c of connecting rod lower end 2b, in leading to through the connection of shank slide block 8, like this shank 1, connecting rod 2 and shank slide block 8 threes is linked together.
The adjustable mechanism of this flat seaming machine needle bar stroke is adjustable in order to realize needle bar stroke.The operation principle that shank 1 moves up and down is such, main shaft 4 rotates, drive the rotation of needle bar crank 3 again, the rotation of needle bar crank 3 drives shank slide block 8 by connecting rod 2 and moves up and down along shank take-up housing 7, because shank 1 links to each other with shank slide block 8 by connecting rod lower end 2b, therefore, shank 1 is also along with moving up and down.
How needle bar stroke specifically regulates, as described below: as shown in Figure 5, the joint pin at cam pin pole crank pin 5 two ends is joint pin one 5a and joint pin two 5b, can find out obviously that by Fig. 5 the center line of joint pin one 5a and joint pin two 5b is that the distance of the two center line straight line is exactly the offset Q of cam pin pole crank pin 5 not on same straight line.
Needle bar stroke is meant that shank 1 in the vertical direction is raised to peak and drops to displacement between the minimum point, this needle bar stroke be with small end 2a and main shaft 4 between distance between center line be relevant, and be to link to each other with joint pin one 5a of cam pin pole crank pin 5 at small end 2a, that is to say needle bar stroke be with joint pin one 5a and main shaft 4 between distance between center line relevant, be L with the two distance definition.
When as the mode location eccentricity needle bar crank pin 5 of Fig. 3, the value of L is illustrated in figure 3 as M, and when as the mode location eccentricity needle bar crank pin 5 of Fig. 4, the value of L is illustrated in figure 4 as N.In the process of cam pin pole crank pin 5 angular transition, relation: M=N-2Q is just arranged, M<N obviously just appears, reached designing requirement.And needle bar stroke=2*L, so just under the different location situation of cam pin pole crank pin 5, needle bar stroke just can change, and this just realizes regulating of needle bar stroke.
Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Although this paper has used 1, shank morely; 2, connecting rod; 2a, small end; 2b, connecting rod lower end; 2c, installing hole; 3, needle bar crank; 3a, connecting hole; 3b, stopper one; 4, main shaft; 5, cam pin pole crank pin; 5a, joint pin one; 5b, joint pin two; 5c, stopper two; 6, screw; 7, shank take-up housing; 7a, groove; 8, shank slide block; 8a, connecting through hole; 9, connecting rod; 10, shank joint; 11, Flat Seaming Machine Head; 12, term such as flat seaming machine fuselage, but do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain essence of the present utility model more easily; They are construed to any additional restriction all is contrary with the utility model spirit.