CN2113999U

CN2113999U - Rocking-arm driving and balancing structure for sewing machines

Info

Publication number: CN2113999U
Application number: CN 92204143
Authority: CN
Inventors: 吴昆连; 杨昆南
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-03-09
Filing date: 1992-03-09
Publication date: 1992-08-26

Abstract

The utility model relates to a rocking arm driving and balancing structure for sewing machines, particularly a rocking arm driving structure and a swinging labour-saving balancing structure thereof for special sewing machines for shoes. The utility model basically and mainly comprises a rocking arm body, a transmission part, a thread hooking part, a balancing part, etc. Therefore, the utility model achieves the functions that the position of a needle hole of the thread hooking part never changes and the removal of the rocking arm is more labour-saving, which is labour-saving and convenient for operators to sew objects in the continuous transmission and the swing of the rocking arm body. The utility model promotes the quality of products and work efficiency, and improves the disadvantages of high noise and low intensity of traditional transmission mechanisms.

Description

Rocking-arm driving and balancing structure for sewing machines

The utility model relates to a kind of rocking arm transmission and balanced structure of Sewing machines, required transmission of sewing rocking arm and the balanced structure of the special-purpose Sewing machines of particularly a kind of shoemaking.

The Sewing machines that is used for sewing footwear limit of tradition must use an ox horn post or rocking lever to turn round and move the footwear body as supporting footwear body and rotation, to make continuous sewing usually.

Wherein, the ox horn post is obstructed sewing work everywhere owing to the footwear body twists difficulty thereon, thereby the side has further rocking lever to produce; the characteristics of rocking lever are can make footwear body cover be put in making to move and pass rocking lever on the rocking lever head shifting angle; make and reduce the footwear body to be twisted degree be minimum; and can finish the work of sewing smoothly; represent as Fig. 1; it illustrates the user mode schematic diagram of conventional rocker; when the sewing pin is walked to the toe-cap side; then must pass rocking arm and swing backward or forward, and the worker of operation Sewing machines, and the footwear body of holding with a firm grip usually carries out sewing and rather require great effort; need push away or draw the rocking arm swing and lasting sewing; very easily make worker's fatigue, is to be a very big burden for worker's muscle power, and causes speed of production slow.

About the thread catcher kind of drive in the rocking lever of tradition, all in the bevel gear transferring power mode of angle variation in response, must bevel gear be set at four～five turnover positions and connect transmission, be difficult for assembling, and the transmission of bevel gear is that people institute is known because of loosening making a noise, so even light is difficult to bear by the noise worker of a rocking lever manufacturing.

Moreover, be positioned at the thread catcher position of main rod end, because the space is narrow and small in the rod end, so the bevel gear of transmission must be set as very tiny tooth pitch in it, when between the article of sewing and needlework, sting line, situations such as clip, still constantly rotate in the bevel gear that colludes line device part, bevel gear is because of too tiny, undercapacity and stress destruction is then worked and also paused thereupon.

The main purpose of the utility model is to provide a kind of laborsaving rocking arm balanced structure, and reaches laborsaving, the counterbalance effect that all can reach effective between pushing away, draw, locating, and then it is more laborsaving, quick that the worker is operated.

A purpose again of the utility model provides a kind of rocking arm drive mechanism of low noise, in order to improving the noise that bevel gear sent of tradition, and improves working environment.

The another purpose of the utility model is to provide a kind of drive mechanism of crumbling of being difficult for, in order to the drive mechanism that improves tradition when experience is stung line or other clips, the situation that bevel gear carefully crumbles less because of tooth pitch.

Rocking arm transmission and balanced structure according to a kind of Sewing machines of the present utility model, consist essentially of the rocking arm transmission and the balanced structure that are formed by combining one laborsaving, high efficiency, low noise by a rocker body, a driving section, a permanent swing part, a balance portion, it is characterized in that:

One rocker body, comprise that one is connected the seat of honour on the body, end has a dead eye on the seat of honour, bearing is installed in the dead eye, the seat of honour is pivotally connected on a block set whereby, block set then is fixed on the body, and then to the oblique inclined hole seat that stretches out in front upper place, seat of honour back hollows out and form an endoporus seat and an outer hole seat in seat of honour bottom; The unification of mat inclined hole cover for seat has the rocking lever of last lower shaft hole, the sheathed again processing article bearing of rocking lever end, and processing article bearing combines with a protecgulum;

One driving section, have one and one of be located in the tailstock of the seat of honour axis, axis is provided with a gear, it drives downwards by a ring odontoid belt and passes on the interior gear of seat, the seat that passes on is fixed on the seat of outer hole, the seat that passes on is held before in conjunction with a universal joint on gear, make universal joint connect one in the swing arm bar under axle, the other end of lower shaft forms a chuck, clip one universal gear makes this be positioned at universal gear between processing article bearing and protecgulum with a little odontoid belt again, upwards drives sheet, make to drive sheet promotion thread catcher, rotate with axle among the speed change rotation at intermittence;

An one permanent swing part, one of has in the tailstock of the seat of honour block set, block set is fixed on the body, and in conjunction with a gear ring, make dentation belt drive one downwards be incorporated into the gear train that passes on (relatively rotating) of endoporus seat by the engagement of two gears, one universal joint connects to pass on outside the seat, make drive one in the rocking lever on axle, the last axle other end is the chuck of a spherical shape fluting, make chuck clip one universal gear (between processing article bearing and protecgulum) upwards mesh half ring gear and ring seat again, needle plate can make the needle tray of needle plate can be in the various swings of rocking arm, and permanent the maintenance aligns with the eedle of pros; One balance portion establishes on one the unification of axle pivot and cogs, and drives a lower gear with belt downwards in body, this lower gear is articulated on the lower shaft, and extends a balancing weight in conjunction with protruding axially going up, and becomes reverse balance to swing with the swing of rocker body.

Now lift one of the utility model specific embodiment, and conjunction with figs. is described as follows, believes every structure, feature, effect, the purpose of the utility model, can obtain clear understanding by following explanation.

Fig. 1 is the user mode figure of the rocking arm of tradition.

Fig. 2 is the combination section of the utility model.

Fig. 3 is the driving section decomposition figure of the utility model.

Fig. 4 is the line portion of the colluding exploded view of the utility model.

Fig. 5 is the stereogram of the utility model.

See also shown in Figure 2ly, it is the combination section of the utility model, and the utility model comprises a rocker body (1), a driving section (2), a permanent swing part (3), a balance portion (4).Above-mentioned part is installed on the Sewing machines body (5) jointly.

Wherein, rocker body (1) includes one and is articulated in the last seat of honour (10) (as shown in Figure 3) of body (5); be that dead eye (101) with the upper end is that pivot center is swung; the lower end forms the microscler block of the inclined hole seat (102) that stretches out forward; its back hollows out into an endoporus seat (105), and there is the dead eye (101) of a perforation upper end; Rocking lever (11) is a major axis, be provided with axially in it on hole (111) and following hole (112); The rocking lever lower end combines with the inclined hole seat (102) of the seat of honour (10), and upper end and bottom undergauge respectively form cover portion (113) and trap portion (114); One processing article bearings (12) extend out from the end of rocking lever (11), and it has two holes up and down: a upper shaft hole (122) and lower shaft hole (123); Its positive position is cut out the belt grooves (121) of a long ring-type; One protecgulum (13), in order to combine with processing article bearings (12), it has the identical shape in front with processing article bearing, have a tooth axis hole (132) and a protruding axle (133) in the faying face, big circular hole is run through for colluding line seat (134) in top one, and it is needle tray (131) that a long slot bore is offered at the top.

In each member of above-mentioned rocker body (1), make that cover portion (114) is sleeved in the inclined hole seat (102) of the seat of honour (10) under the rocking lever (11), processing article bearings (12) then are sleeved on the block set (113), make protecgulum (13) combine with processing article bearings (12) again.The dead eye (101) of the seat of honour (10) then cooperates with bearing (32) outer shroud, and ring cooperates with a block set (31) that is fixed in body in the bearing (32), and the seat of honour (10) is incorporated in body on the bearing block (106).It combines by the bottom of a pole (14) with the seat of honour (10); Tiltedly stretch into body again and be incorporated into simultaneously on the bearing block (106) (as shown in Figure 2).One driving section (2), comprise the transmission mechanism that colludes the line device, it establishes an axis (21) in the seat of honour (10), and axis is subjected to the change-speed gearing group (211) of a driving belt (20) institute transmission to control its rotating speed (gear train is made up of the oval gear of two off-centre), and the speed that makes this stressed transmission be batch (-type) changes; Axis (21) is gone up a gear (212) drive one dentation belt (22) is installed, dentation belt (22) stretch into downwards one pass on the seat (23) in, with gear (232) engaged transmission, the seat that passes on can be incorporated on the outer hole seat (105), and can adjust the tightness of control dentation belt (22); Passing on seat (23) front end and gear (232) connecting portion is connected with a universal joint (233); Be connected with lower shaft (24) by universal joint (233).Lower shaft (24) is positioned at hole (112) under the rocking lever (11), and the other end of lower shaft (24) then forms the chuck (241) of a round end shape and fluting.Utilize this chuck (241) to fasten one and be positioned at the universal gear (25) of processing article bearings (12) (as shown in Figure 4), this universal gear (25) is that the protruding axle (133) with protecgulum (13) be that the axle center rotates, and transmission of power to being had the drive sheet (26) of gear (262) by a little dentation belt (251), the hook part (261) that drives sheet (26) can promote to collude line device (27) and rotate; Along with the speed of having a rest between the axis (21) rotates, through dentation belt (22), pass on seat (23), a lower shaft (24), universal gear (25), drive sheet (26) and drive to thread catcher (27), finish the speed change of having a rest between the thread catcher and rotate.

An one permanent swing part (3) can make rocker body (1) in any swing in front and back, and needle plate (135) perseverance of thread catcher (27) aligns Sewing needles (52), makes eedle be able to smoothly sewing up and down; It comprises and one of is incorporated on the body block set (31), make block set close in dead eye (101) with bearing (32) pivot but and independent rotation, also doing coaxial not interfering with each other with axis (21) therebetween cooperates, one gear ring (33) is incorporated on the block set (31), and pass on seat (35) to stretch cover unification under the dentation belt (34), pass on and be provided with gear train (351) in the seat and change transmission turning to revise, spool (36) combine on the universal joint (352) and one and front end is also established; Last axle (36) is positioned at hole (111) on the rocking lever (11), the last axle other end forms a spherical shape and establishes the chuck (361) of fluting, make chuck fasten one and be positioned at one of processing article bearings (12) universal gear (37), this universal gear (37) is half ring gear of engaged transmission (381) then, and half ring gear (381) and ring seat (38) are that to be embedded in colluding in the line seat (134) of protecgulum (13) permanent in eedle with turning to of control needle tray.

As shown in Figure 2, a balance portion (4) is to establish on one axle (40) in body, itself and axis (21) concentric, last by a bearing (48) cog with one (41) combine, drive a belt (42), belt drives a lower gear (43) again.Establish a protruding axle (44) between the same lower shaft of lower gear (43) (47), and extend upward in conjunction with a balancing weight (45), and combine with bearing with lower shaft (47), reach by this when swing arm body (1) (or backward) forward, then balancing weight (45) can be done backward the relative equilibrium swing of (or forward), with order from lowest part upwards the pendular body (1) of swing obtain from top to bottom the balance of the balancing weight of swing relatively, and obtain the laborsaving effect that reaches any location; Then the operator of Sewing machines can intently adjust the quality of the position of footwear body on the swing arm body in order to sewing, and the pendulum angle that must not take a lot of trouble to adjust arduously swing arm.

Aforementioned driving section (2), permanent position swing part (3) pass on seat (23), (35) all be can be outside the seat of honour hole seat (105) and endoporus seat (104) raise the position of adjusting, making dentation belt (22), (34) all be tensioning state, and reach the effect of transmission noiselessness.

Under the aforementioned driving section (2) on axle (24) and the permanent position swing part (3) axle (36) chuck (241), 361 that is spherical and fluting is all arranged the end before), and be respectively cross support arm in the hole that buckles into universal gear (25), (37).The turnover of upper and lower like this axle in the angle of qualification can make universal gear continue to rotate.

The setting of aforementioned pole (14) is in order to reduce the sewing workplace swing arm body (1) the inclined hole seat (102) that pressure produced and the stress at axis (21) position to be concentrated, to reduce the stress deformation of rotating shaft or armed lever; And will be derived from collude line device position pressure by the oblique deep-slotted chip breaker (51) that enters casing (5) of pole (14), again with one cog (41) combine and share.

Comprehensive the above as can be known, the utility model structure can effectively reach laborsaving, high efficiency, noise-decreasing, minimizing stress are concentrated the effect of destruction.

Claims

1, a kind of rocking arm transmission and balanced structure of Sewing machines consist essentially of the rocking arm transmission and the balanced structure that are formed by combining one laborsaving, high efficiency, low noise by a rocker body, a driving section, a permanent swing part, a balance portion, it is characterized in that:

2, according to the rocking arm transmission and the balanced structure of the described Sewing machines of claim 1, the seat of honour lower end that it is characterized in that rocker body can be in conjunction with a pole is set, make oblique stretch in the body and combine, the stress that reduces seat of honour head is concentrated, and promoted the smooth and easy of swing with bearing block.

3, Sewing machines rocking arm transmission and the balanced structure according to claim 1, be provided with belt grooves in the processing article bearing that it is characterized in that rocker body and the one side that protecgulum combines, for belt transmission therebetween, the protecgulum upper end is the fluting shape of semicircle, in order to making the relative slippage of needle plate therebetween between the rocker body swing.

4, Sewing machines rocking arm transmission and the balanced structure according to claim 1, it is characterized in that universal gear is to establish a pore at one of gear end, establish a cross support arm in the pore, then make the chuck clip of going up axle or lower shaft in cross support arm, its turnover twisting in certain angle all can effectively drive universal gear and rotate.