CN201190225Y

CN201190225Y - Feeding drawing unit of sewing machines

Info

Publication number: CN201190225Y
Application number: CNU200820102140XU
Authority: CN
Inventors: 吴国溶
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-04-25
Filing date: 2008-04-25
Publication date: 2009-02-04
Anticipated expiration: 2018-04-25

Abstract

The utility model relates to a cloth feeding and towing device of a sewing machine on which a propeller used for pulling cloth and a fabric presser are lifted synchronously, and the cloth feeding and towing device belongs to the technical field of sewing machine fittings and equipment. The cloth feeding and towing device of the sewing machine is characterized in that an eccentric wheel mechanism is directly sleeved on the main shaft of the sewing machine, the eccentric wheel mechanism is connected with an eccentric connecting rod, and the output end of the eccentric connecting rod does reciprocating movement and is connected with the cloth feeding and towing device. The cloth feeding and towing device comprises a fixed frame and a propeller connected with the fixed frame into a whole, and a propeller propelling mechanism and a propeller lifting mechanism are arranged on the fixed frame. Compared with the electric cloth pulling and propelling device, the utility model has the advantages that the cost is only one third of the original cost, the presser foot and the propelling wheel can be lifted synchronously, and the high consistency performance of the transmission structure is good.

Description

The feeding draw-gear of Sewing machines

Technical field:

The utility model relates to Sewing machines fittings equipment technical field, refers in particular to the propeller of granny rag on a kind of Sewing machines and Sewing machines feeding draw-gear that cloth-pressing device is mentioned synchronously.

Background technology:

In the prior art, the pay-off of tradition Sewing machines conveyer belt material generally adopts cradle, the band material is placed on the towing tension of moving by Sewing machines on the guide wheel of bin and spurs charging or the charging of pulling guiding manually, can produce the larger-size deviation of sewing to resilient cloth, produce quality problems, influence operating efficiency, increase production cost.

Chinese patent literature CN2639334 discloses a kind of Sewing machines pay-off of conveyer belt material, comprise electric controller and pay-off, electric controller comprises casing and is installed in casing interior reducing motor and electronic-controlled installation, this electronic-controlled installation comprises motor photoelectric control circuit and optoelectronic switch and photoelectric alarm circuit and warning optoelectronic switch and alarm lamp, alarm lamp is loaded on the casing and exposes casing, described pay-off comprise the active drawing-inroller that connects with the reducing motor output shaft be installed in casing and with the active parts feeding axle to the passive drawing-inroller that contacts, also have certain distance behind the drawing-inroller and be fixed on the casing locating button and before drawing-inroller certain distance and be fixed on guide frame on the casing.The document adopts control automatically initiatively feeding and fault alarm, reduce elastic webbing material sewing error to a certain extent, but, owing to adopted auxiliary equipment such as electronic control and fault alarm, the production cost of Sewing machines is increased, and auxiliary equipment is complicated, can increase the fault rate of machine own undoubtedly, this is that the client is unacceptable.

And, the defective of the mechanical granny rag feeding transmission design that the machine of threading is defeated, industry is but never solved.So, the necessity of the present utility model of proposition is just arranged.

Summary of the invention:

At the deficiency of existing sewing machine cloth drawing feeding transmission design, the utility model provides a kind of feeding draw-gear of rational in infrastructure, Sewing machines that production cost is low, the effect of mentioning synchronously with the propeller of the cloth-pressing device of realizing Sewing machines and granny rag.

The purpose of this utility model is achieved through the following technical solutions:

A kind of feeding draw-gear of Sewing machines, wherein: a direct sheathed eccentric mechanism on the machine spindle, this eccentric mechanism connects an eccentric ratio, and the output of eccentric ratio is reciprocating, and connects a feeding draw-gear.

Described feeding draw-gear comprises fixed mount and the propeller that is connected as a single entity with it, fixed mount is provided with a propeller propulsive mechanism and propeller hoisting mechanism, wherein, described propeller propulsive mechanism comprises: be horizontally disposed with a rocking bar in the duct on the fixed mount, one end of rocking bar stretches out fixed mount and eccentric ratio socket, the sheathed commutation rocking bar of the rocking bar other end, the commutation rocking bar is fixed a bolt, is connected the circular hole socket by this bolt and rocking bar;

The described commutation rocking bar other end stretches out in fixed mount, and the external part of commutation rocking bar is provided with chute, slides in the chute and establishes a movable bolt, and the connecting rod that is slidingly connected on this movable bolt, and this connecting rod other end and angle of rake runner driving lever flexibly connect;

Described propeller hoisting mechanism: comprise that propeller passes through wheel carrier location, an elevating lever is connected on this wheel carrier, what elevating lever slided up and down is sheathed in the trepanning that is provided with on the fixed mount, the elevating lever appropriate location is installed with a limited block, this limited block is locked on the elevating lever by the bolt that wears on it, a sliding bearing is fixed in the outside of limited block, this limited block also extends and is provided with slide block, this sliding bearing and slide block are in together in the chute that forms on the fixed mount, also be provided with an inclined-plane on this slide block, be provided with second sliding bearing movable up and down at the place, inclined-plane, this second sliding bearing is fixedly arranged on an end of shadoof, the shadoof middle part is located on the fixed mount by the bolt bolt, shadoof acts on second sliding bearing and promotes slide block and limited block, promote elevating lever and promote propeller, this limited block top, the outer also sheathed stage clip of elevating lever, the stretching, extension by stage clip makes propeller playback.

Described propeller comprises that one advances runner, rotating shaft and wheel carrier, the propelling rotaring wheeling sleeve is located at rotating shaft and is fixedly mounted on the wheel carrier, wheel carrier and fixed mount are connected as a single entity, and advance runner to be made up of ratchet and the rubber wheel that is sheathed on its periphery, and ratchet and driving lever acting in conjunction realize that folk prescription is to rotation.

Described rocking bar and eccentric ratio are affixed by the multi-directional ball connector.

Described propeller propulsive mechanism connects by being connected steel cable with the cloth-pressing device of Sewing machines, realizes that the cloth-pressing device of propeller propulsive mechanism and Sewing machines is synchronized with the movement.

Described elevating lever upper end is provided with sleeve pipe, and sleeve pipe has external screw thread outward, closes with the inner bolt bolt of fixed mount trepanning, and sleeve pipe is squeezed in stage clip by the rotation of screw thread.

Be provided with the gap between the slide block in the described limited block outside and chute.

The course of work of the present utility model is as follows:

The transmission of this mechanism, is made eccentric ratio produce one and comes and goes quantitative motion through the rotating band movable eccentric wheel by main shaft.Momental size is determined by eccentric higher amount.Pass to rocking bar by a multi-directional ball then, by the commutation rocking bar make connecting rod produce one up and down reciprocatingly and the adjustable action of amount of exercise promote unidirectional propeller, make propeller extend the direction rotation of meter, thereby the pulling cloth advances.Owing to adopted structure of the present utility model, utilized the kind of drive of steel cable to make the cloth-pressing device of machine and the propeller of granny rag mention synchronously.

The utility model is compared with the cloth puller of existing circulation, has following advantage:

1, comparing with electrodynamic type granny rag propulsion plant, is about 1/3 of original cost;

2, the utility model can be mentioned presser feet synchronously and be advanced wheel;

3, the used drive mechanism of the utility model, high even performance is good.

Description of drawings:

Now in conjunction with the accompanying drawings the utility model is elaborated:

Fig. 1. the utility model push structure schematic diagram;

Fig. 2. the utility model promotes structure one schematic diagram;

Fig. 3. this practical trapezoidal another schematic diagram of lifting structure;

Fig. 4. the utility model first user mode figure;

Fig. 5. the utility model second user mode figure.

Among the figure, 1, main shaft, 2, eccentric wheel, 3, eccentric ratio, 4, rocking bar, 5, the commutation rocking bar, 501, chute, 6, connecting rod, 7, propeller, 701, ratchet, 702, rubber wheel, 703, driving lever, 704, wheel carrier, 8, fixed mount, 9, steel cable, 101, elevating lever, 102, limited block, 103, first sliding bearing, 104, slide block, 105, the inclined-plane, 106, second sliding bearing, 107, shadoof, 108, stage clip, 109, sleeve pipe.

The specific embodiment:

Embodiment: structure such as Fig. 1 are to shown in Figure 5, a kind of feeding draw-gear of Sewing machines, wherein: a directly sheathed eccentric wheel 2 mechanisms on the machine spindle 1, these eccentric wheel 2 mechanisms connect an eccentric ratio 3, the output of eccentric ratio 3 is reciprocating, and connects a feeding draw-gear.

As shown in Figure 1, the propeller 7 that described feeding draw-gear comprises fixed mount 8 and is connected as a single entity with it, fixed mount 8 is provided with a propeller propulsive mechanism, wherein, described propeller propulsive mechanism comprises: be horizontally disposed with a rocking bar 4 in the duct on the fixed mount 8, an end of rocking bar 4 stretches out fixed mount 8 and eccentric ratio 3 sockets, the sheathed commutation rocking bar 5 of rocking bar 4 other ends, commutation rocking bar 5 is fixed a bolt, is connected the circular hole socket by this bolt and rocking bar 4;

Described commutation rocking bar 5 other ends stretch out in fixed mount 8, and the external part of commutation rocking bar 5 is provided with chute 501, the sliding movable bolt of establishing in the chute 501, and the connecting rod 6 that is slidingly connected on this movable bolt, these connecting rod 6 other ends and angle of rake runner driving lever 703 flexibly connect;

As Fig. 2, shown in Figure 3, described propeller hoisting mechanism: comprise that propeller passes through a wheel carrier 704 location, an elevating lever 101 is connected on this wheel carrier, what elevating lever 101 slided up and down is sheathed in the trepanning that is provided with on the fixed mount 8, elevating lever 101 appropriate locations are installed with a limited block 102, this limited block 102 is locked on the elevating lever 101 by the bolt that wears on it, first sliding bearing 103 is fixed in the outside of limited block 102, this limited block 102 also extends and is provided with slide block 104, first sliding bearing 103 is in together in the chute that forms on the fixed mount with slide block 104, and, be provided with the gap between slide block 104 and chute.Also be provided with an inclined-plane 105 on this slide block, 105 places are provided with second sliding bearing 106 movable up and down on the inclined-plane, this second sliding bearing 106 is fixedly arranged on an end of shadoof 107, shadoof 107 middle parts are located on the fixed mount by the bolt bolt, shadoof 107 acts on second sliding bearing 106 and promotes slide blocks 104 and limited block 102, promotes elevating lever 101 and promote propeller 7, this limited block top, the also sheathed outward stage clip 108 of elevating lever, the stretching, extension by stage clip makes propeller playback.Described elevating lever upper end is provided with sleeve pipe 109, and sleeve pipe 109 is outer an external screw thread, closes with the inner bolt bolt of fixed mount trepanning, and sleeve pipe 109 is squeezed in stage clip 108 by the rotation of screw thread.

Described propeller comprises that one advances runner, rotating shaft and wheel carrier 704, the propelling rotaring wheeling sleeve is located at rotating shaft and is fixedly mounted on the wheel carrier 704, wheel carrier 704 is connected as a single entity with fixed mount 8, advance runner to be made up of ratchet 701 and the rubber wheel 702 that is sheathed on its periphery, ratchet 701 realizes that with driving lever 703 actings in conjunction folk prescription is to rotation.

Described rocking bar 4 is affixed by the multi-directional ball connector with eccentric ratio 3.

Show that as Fig. 5 the propeller propulsive mechanism connects by being connected steel cable 9 with the cloth-pressing device of Sewing machines, realizes that the cloth-pressing device of propeller propulsive mechanism and Sewing machines is synchronized with the movement.

Claims

1, a kind of feeding draw-gear of Sewing machines is characterized in that: a direct sheathed eccentric mechanism on the machine spindle, and this eccentric mechanism connects an eccentric ratio, and the output of eccentric ratio is reciprocating, and connects a feeding draw-gear.

2, according to the feeding draw-gear of claim 1 Sewing machines, it is characterized in that: described feeding draw-gear comprises fixed mount and the propeller that is connected as a single entity with it, and fixed mount is provided with a propeller propulsive mechanism and propeller hoisting mechanism, wherein,

Described propeller propulsive mechanism comprises: be horizontally disposed with a rocking bar in the duct on the fixed mount, one end of rocking bar stretches out fixed mount and eccentric ratio socket, the sheathed commutation rocking bar of the rocking bar other end, the commutation rocking bar is fixed a bolt, is connected the circular hole socket by this bolt and rocking bar;

3, according to the feeding draw-gear of claim 1 Sewing machines, it is characterized in that: described propeller comprises that one advances runner, rotating shaft and wheel carrier, the propelling rotaring wheeling sleeve is located at rotating shaft and is fixedly mounted on the wheel carrier, wheel carrier and fixed mount are connected as a single entity, advance runner to be made up of ratchet and the rubber wheel that is sheathed on its periphery, ratchet and driving lever acting in conjunction realize that folk prescription is to rotation.

4, according to the feeding draw-gear of claim 1 Sewing machines, it is characterized in that: described rocking bar and eccentric ratio are affixed by the multi-directional ball connector.

5, according to the feeding draw-gear of claim 1 Sewing machines, it is characterized in that: described propeller propulsive mechanism connects by being connected steel cable with the cloth-pressing device of Sewing machines, realizes that the cloth-pressing device of propeller propulsive mechanism and Sewing machines is synchronized with the movement.

6, according to the feeding draw-gear of claim 1 Sewing machines, it is characterized in that: described elevating lever upper end is provided with sleeve pipe, and sleeve pipe has external screw thread outward, closes with the inner bolt bolt of fixed mount trepanning, and sleeve pipe is squeezed in stage clip by the rotation of screw thread.

7, according to the feeding draw-gear of claim 1 Sewing machines, it is characterized in that: be provided with the gap between the slide block in the described limited block outside and chute.