CN1191402C

CN1191402C - Cloth feeding device used for sewing machine

Info

Publication number: CN1191402C
Application number: CNB011093404A
Authority: CN
Inventors: 金汉�
Original assignee: KOREA SEWING MACHINE INDUSTRY Co Ltd
Current assignee: KOREA SEWING MACHINE INDUSTRY Co Ltd
Priority date: 2000-02-28
Filing date: 2001-02-28
Publication date: 2005-03-02
Anticipated expiration: 2021-02-28
Also published as: KR100358931B1; KR20010084660A; CN1311365A; TW538168B

Abstract

An apparatus for moving stitchable material in a sewing machine comprises a pair of wheels including upper and lower wheels for clamping the stitchable material threbetween and moving the stitchable material, a power transfer shaft rotating intermittently in a direction in synchronism with a sewing machine drive shaft, a switch-over gear coupled with the power transfer shaft for transmitting the rotation of the power transfer shaft, a gear shift system for moving the switch-over gear leftward or rightward along a guide shaft of a gear box mounted aroud the switch-over gear with a reverse lever installed at one side of the sewing machine, and a transmission system which includes a forward gear mounted at one side from the switch-over gear and a reverse gear mounted opposite to the forward gear and transmits the rotation of one of the gears and engaged with the switch-over gear to the lower wheel.

Description

Used cloth running gear on the Sewing machines

Invention field

The present invention relates to the used cloth running gear of a kind of Sewing machines, more particularly, relate to a kind of device that on Sewing machines, utilizes a counter gear mechanism can realize the reverse traveling of cloth at an easy rate.

Background of invention

The sewing machine cloth running gear has upper and lower two wheels vis-a-vis cloth is clamped in therebetween, provides driving force to make its traveling by lower whorl.Yet traditional Sewing machines is not realized the function of the reverse traveling of cloth, does not promptly have the function of counter-rotating lower whorl.This is because lower whorl is driven by an one-way clutch, can only make cloth travelling wheel forward, and can not backward rotation.

Like this, very inconvenient concerning the user, because cloth often needs reverse or two-way traveling in operation.

For head it off, korean industrial property office number of patent application: proposed a solution among the 1988-6246.

Fig. 1 and Fig. 2 are the structure chart of the Sewing machines of this application, side view 1 and front view 2.

Should have the end that 1, one flywheel 2 of a driving shaft is contained in driving shaft 1 by existing Sewing machines, sprocket wheel 3 and 4 is fixedly mounted on the middle part of driving shaft 1.Sprocket wheel 3 is installed in a sprocket wheel 6 on the wall suspending axis 5 and is connected by a cingulum 7 is same, and sprocket wheel 4 is connected with being installed in a sprocket wheel 9 on lower shaft 8 one ends by a cingulum 10.Wall suspending axis 5 and lower shaft 8 rotate synchronously with driving shaft 1.Meanwhile, syringe needle N whenever turns around in cantilevered axle 5 and pumps once.When syringe needle N descended, syringe needle N injected among the pin hole MA1 that is contained on the sewing machine table cloth bracing frame MA.

For by lower shaft 8 transferring power, comprise first line shaft 21 in traditional Sewing machines from lower shaft 8 transferring power; One is held power and this transmission of power is given second line shaft 23 of lower whorl 33 from first line shaft; With a clutch 25, be installed between first line shaft 21 and second line shaft 23 with change second line shaft 23 just/the reverse turn direction.In addition, also have one second driven wheel 39 on one first driven wheel 37 and the driving shaft 38 to be meshed, at an end of second line shaft 23, driving shaft 38 is connecting lower whorl 33 motions, thereby realizes forward and reverse rotation of lower whorl 33 along with the driving of second line shaft 23.Label 13,15 and 23 is represented a rotating shaft, a bent axle and an idler gear respectively.

So traditional sewing device, not only complexity but also inconvenience because a large amount of gears is arranged by first and two line shafts transmission power, have also increased manufacturing cost and manufacturing time simultaneously.

What is more, and it also may often break down, because clutch 25 is used for realizing forwards/reverse operation, will weares and teares after long-time, thereby produce sipping fault.

Goal of the invention

The present invention is intended to overcome above-mentioned defective, by simplified structure, thereby has reduced production and processing and assembles the required time.

Another object of the present invention is the fault that produces in the prevention sewing operation, also reduces reverse sewing because capable noise is produced in the slip of clutch.

For realizing purpose of the present invention, cloth running gear used on a kind of Sewing machines now is provided, have the power transmission axis mechanism that a pair of wheel of clamping cloth betwixt and can rotate synchronously with a Sewing machines driving shaft; Comprise: a gear inversion mechanism connects into and the rotation direction of power transmission shaft machine can be changed into forward or backwards with power drive mechanism; With a transmission mechanism, connect into and the rotation of power transmission axis mechanism can be passed to described wheel by selected direction with the gear inversion mechanism.

Description of drawings

From the legend of following brief introduction, can know clearly purpose of the present invention and characteristics, in the accompanying drawing:

Fig. 1 is the sectional view of traditional Sewing machines;

Fig. 2 is the positive view of traditional Sewing machines;

Fig. 3 is the stereogram of sewing machine cloth running gear of the present invention;

Fig. 4 is the detail drawing of the cloth forward traveling of device shown in Figure 3;

Fig. 5 is the detail drawing of the reverse material distribution traveling of device shown in Figure 3.

The specific embodiment

As shown in Figure 3, the inventive system comprises: a pair of two wheels up and down are used for the clamping cloth and make its traveling; A power transmission shaft is synchronized with the Sewing machines driving shaft and does the batch (-type) rotation together; A fork shift gear 41 is used for the rotation of transferring power axle with power transmission shaft coupling; A gear inversion mechanism, be used for making fork shift gear 41 move left and right along a guide shaft 47 of a gear-box 45, this move left and right realizes that by reverse operating bar 51 that is installed in Sewing machines one side of operation described fork shift gear 41 is mounted to around described guide shaft 47 again; With a transmission mechanism, comprise a forward gear 35 and a reverse gear 34, the former is installed in a side of fork shift gear 41 and the latter is installed in the opposite side relative with it, thus with

gear

34 and 35 by passing to lower whorl 33 with the fork shift gear meshing.

The gear inversion mechanism comprises: a reverse operating bar 51, and it is contained in Sewing machines one side, can rotate in certain angle up and down; Multistage slip leverage and hinged device and reverse operating bar 51 connect into and can transmit the rotation that reverse operating bar 51 produces; A gear-box 45, it is fixed on an end of slide bar system; But a fork shift gear holding portion 43 is mounted to move left and right in gear-box; With a jockey, be connected to an end of slide bar system and be used for promoting fork shift gear holding portion 43 and in gear-box 45, realize move left and right.

Slide bar system and hinged device comprise: reverse operating bar rotating shaft 52 is at one end connecting reverse operating bar 51; A reverse cam 53, the other end that is connecting reverse operating bar rotating shaft 52 also can be around reverse operating bar rotating shaft 52 rotations; A head rod 54 can vertically connect an oppositely end of cam 53 versatilely; A slide bar 56, slide bar 56 is mounted to its left and right sides at an end of head rod 54 and can rotates up and down around a slide bar pin joint 55; A slide bar bent axle 58 is installed in the lower end of slide bar 56, and its front and back two sides can center on slide bar bent axle hinged support 57 left-right rotation; With one second link rod 59, be connected to and move horizontally with the front end of slide bar bent axle 58.

Jockey comprises: one first connecting portion 61, and it has a pin joint to be positioned at a side of gear-box, and is connecting one second connecting rod 59 and formation slide bar system; One second connecting portion 63, continuous with the other end of first connecting portion 61, be fixed on the fork shift gear holding portion 43 with its middle part then; Link to each other with the other end of a third level connecting portion 65, and the opposite side of a pin joint at gear-box 45 arranged with second connecting portion 63.

In addition, an axis of guide 47 fork shift gear holding portion 43 that is used for leading is arranged in gear-box inside.Around a spring 48 is housed on the axis of guide 47, be used for making fork shift gear 41 to reset.

Transmission mechanism comprises: a power transmission shaft 36 is installed in rotation on the fork shift gear; A forward gear 35 is installed in an end of power transmission shaft 36, can produce forward rotation when being meshed with fork shift gear 41; A reverse gear 34 is mounted to forward gear 35 and faces mutually, produces backward rotation when being meshed with the fork shift gear; A driving shaft 38 rotates lower whorl 33 thereby be connected with power transmission shaft 36 with selected direction.

Power transmission shaft 36 comprises first driven wheel 37 that is formed on the other end, and driving shaft 38 comprises one second driven wheel 39, and the latter can be meshed with first driven wheel 37 in its lower end.Driving shaft 38 also comprises a driven wheel 40 in addition, can be meshed with lower whorl 33 in the top.

Introduce the course of work of the present invention below.

Different aspect the driving mechanism of oppositely walking cloth, something in common does not repeat them here certainly with traditional Sewing machines in the present invention.

An end that in oppositely sewing, is installed in an axle of sewing machine main body supporting by the reverse operating bar 51 of user's operation.

Reversible control bar 51 is after the user depresses, and as shown in Figure 3, reversible control bar 51 drives the 52 equidirectional rotations of reverse operating bar axle.Then, with the interconnected reverse cam 53 of reverse operating bar 51 along with reverse operating bar axle 52 along equidirectional rotation, then drive the head rod 54 that is fixed on reverse cam 53 1 sides downwards, correspondingly drive slide bar 56 and clockwise rotate around sliding bar pin joint 55.

Next, sliding bar bent axle 58 is done the inhour rotation around sliding bar bent axle pin joint 57 under slide bar 56 effects.This rotation spurs 59 motions of second link rod again, and the latter is connecting the front end of sliding bar bent axle, sees shown in Figure 3.

The dextrad of second link rod 59 moves and can clockwise rotate around its hinged support 62 by drive first connecting portion 61, and first connecting portion, 61 drives, second connecting portion 63 is moved to the left, because second connecting portion 63 is connected the lower end of first connecting portion 61 together.The moving to left of second connecting portion 63 drives fork shift gear holding portion 43 again and moves together in gear-box 45.Second connecting portion 63 is fixed up by a screw 64 with fork shift gear holding portion 43.

Shown in Figure 5, spring 48 is installed on the guide shaft 47, and gear-box 45 compresses this spring when fork shift gear 41 left-hands move.Fork shift gear 41 left-hands just move and are meshed with the reverse gear 34 of power transmission shaft 36.Power transmission shaft 36 just rotates and rotates first driven wheel 37 with reverse gear 34, and to rotate second driven wheel, 39, the first driven wheels 37 and second driven wheel 39 again be the positive angle engagement to first driven wheel 37 then.Second driven wheel 39 drives driven wheel 40 by driving shaft 38 and rotates, thereby drives lower whorl 33 backward rotation.

If after reversible control bar 51 sets back, as shown in Figure 4, then be the common forward cloth walking state of Sewing machines, 43 of fork shift gear holding portions move right under the restoring force effect of the spring of installing around the guide shaft 47 of gear-box 45 48.Thus, 41 of fork shift gears in the fork shift gear holding portion 43 move to second position from first position, wherein in primary importance fork shift gear 41 and reverse gear 34 engagements, second position fork shift gear 41 then with 35 engagements of forward gear.

As mentioned above, the present invention can significantly reduce the processing and manufacturing and the installation time of Sewing machines, because the cause that its driving mechanism is simplified greatly.And the present invention not only can prevent the generation of operating trouble, but also the noise that the slip of driving mechanism produces can reduce owing to reverse sewing the time.

Although the above-mentioned the preferred embodiments of the present invention that disclose under the situation that does not depart from the appended claim scope, still can have various improvement and alternative.

Claims

1. used cloth running gear on the Sewing machines has the power transmission axis mechanism that a pair of wheel of clamping cloth betwixt and can rotate synchronously with a driving shaft; It is characterized in that, comprising:

A gear inversion mechanism, itself and power drive mechanism connect into and the rotation direction of power transmission axis mechanism can be changed into forward or backwards; With

A transmission mechanism, itself and gear inversion mechanism connect into and the rotation of power transmission axis mechanism can be passed to described wheel by selected direction.

2. used cloth running gear on the Sewing machines has the power transmission axis mechanism that a pair of wheel of clamping cloth betwixt and can rotate synchronously with a driving shaft; It is characterized in that, comprising:

A fork shift gear, but itself and power transmission shaft connect into the rotation of transferring power power transmission shaft;

A gear inversion mechanism is used for along a guide shaft of a gear-box left or the fork shift gear that moves right, and described gear-box is installed around described fork shift gear; With

A transmission mechanism, it has a forward gear that is installed in fork shift gear one side; With the reverse gear of a relative installation, be used for that rotation of forward and reverse gear and fork shift gears engaged is passed to described wheel with the forward gear.

3. cloth running gear as claimed in claim 2 is characterized in that, described gear inversion mechanism comprises:

A reverse operating bar, it is installed in rotation on a side of Sewing machines;

Multistage slide bar system and articulated mounting, but it connects into the power that transmission is produced by the rotation of reverse operating bar with the reverse operating bar;

A gear-box, it is fixedly mounted on an end of slide bar system;

A fork shift gear holding portion, it is installed within the gear-box and can left and rightly within it moves; With

A jockey, an end of itself and described slide bar system connect into can be in the gear-box left and right described fork shift gear holding portion that moves.

4. cloth running gear as claimed in claim 3 is characterized in that, described jockey comprises:

One first connecting portion, it has a pin joint that is positioned on gear-box one side, and has an end connecting slide bar system;

One second connecting portion, its other end with first connecting portion links to each other, and is fixed in the middle among the gear holding portion; With

One the 3rd connecting portion, its other end with second connecting portion links to each other, and has a pin joint that is positioned at the gear-box opposite side.

5. cloth running gear as claimed in claim 4 is characterized in that, is provided with a guide shaft, is used at gear-box guiding fork shift gear holding portion, and around guide shaft an elastic component is installed and is come to provide a restoring force for the fork shift gear.

6. cloth running gear as claimed in claim 2 is characterized in that, described transmission mechanism comprises:

A power transmission shaft, it is installed in rotation on the fork shift gear;

A forward gear, its end at described power transmission shaft are mounted to can be with the fork shift gears engaged along being rotated in the forward;

A reverse gear, it is mounted to vis-a-vis with the forward gear on power transmission shaft and can be meshed with the fork shift gear that is moved by the gear inversion mechanism and along reverse rotation; With

A driving shaft, itself and power transmission shaft connect into and can rotate described wheel by a preferential direction.