CN1109149C

CN1109149C - Uper shaft directly-driving sewing machine

Info

Publication number: CN1109149C
Application number: CN99107682A
Authority: CN
Inventors: 铃木一郎; 新堀胜; 伊藤等
Original assignee: Juki Corp
Current assignee: Juki Corp
Priority date: 1998-06-04
Filing date: 1999-06-04
Publication date: 2003-05-21
Anticipated expiration: 2019-06-04
Also published as: JP4164158B2; JPH11347277A; CN1239159A

Abstract

The purpose of the present invention is to provide a sewing machine directly driven by the upper shaft. The motor assembly and disassembly of this sewing machine are simple, and the processing accuracy of the motor assembly accessories does not need to be too strict. Dust and oil will not interfere with the motor, and the cloth feeding mechanism can be easily assembled. The technical solution of the present invention is to fix the motor on the right end of the vertical fuselage with the opening on the right. The cloth feeding adjustment mechanism is set at the right end.

Description

Uper shaft directly-driving sewing machine

The present invention relates on axle on the Sewing machines, directly connect the Sewing machines of motor reel.

As the existing uper shaft directly-driving sewing machine of this class, the known spy of having opens disclosed technology in the flat 4-8393 communique.This uper shaft directly-driving sewing machine, dispose upright vertical fuselage of hollow and the self-supporting fuselage that is located on the sewing machine table and begin the horn that along continuous straight runs extends, above the vertical fuselage side of described horn, locate, be provided with on the supporting wall of horn one have with on the hole of axle axle core same axis core.

And, mounting has the tubular motor casing that is covered with as around the motor of drive unit above the vertical fuselage side of described horn, simultaneously, be rotatably assorted in the dead eye that is provided with on the supporting wall of the aforementioned horn driving shaft of motor is at the vertical fuselage side upper fixed motor of horn.By shaft coupling the driving shaft of motor and last axle are linked together, on the timing belt pulley that connects by motor drive shaft, be provided with the fan of cooling usefulness.

On described timing belt pulley, hang the synchronous belt of upward axis transmission of drive force.

There is following point in the prior art.Promptly, mounting has the tubular motor casing of motor above the vertical fuselage side of horn, the driving shaft of motor is being rotatably assorted in the dead eye that is provided with on the supporting wall of horn, for this reason, must strictly control the diameter of motor casing and the machining accuracy of dead eye and Motor Drive shaft diameter, simultaneously, not concentricity, the degree of balance that must strict these parts of control etc.

This has not only improved processing cost, and, when assembling and maintenance, specific technology must be arranged, and will spend the more time, and can not use general commercially available motor.In addition and since motor be the sealing and be arranged on the vertical fuselage interior of hollow, the poor radiation of motor, must be provided with cooling fan force the cooling.

This also can raise the cost.And, in the prior art, owing to disposing motor drive shaft and give the timing belt pulley of lower shaft transmission of drive force in a vertical fuselage of hollow, the synchronous belt wearing and tearing powder of the generation in service of Sewing machines and oil are attached on the motor, and generation is disturbed to motor.

In order to address the above problem, the invention provides a kind of uper shaft directly-driving sewing machine, comprise: the upright vertical fuselage of establishing on the platen of Sewing machines, extend the horn that is provided with from vertical main body section top along continuous straight runs, the lower shaft of support free to rotate on platen, axle in support free to rotate on the horn, have and be connected to axle by connecting elements and make it motor with the coaxial motor reel of the axle core of last axle, it is characterized in that, described motor is fixed on the right part of described vertical fuselage, is provided with the front and back of the motor that is covered with the right part that is fixed on described vertical fuselage and top and at the fin of right-hand opening.

According to invention recited above, motor is fixed on vertical fuselage right part, compared with prior art, unnecessary have a just assembly and disassembly motor simply of specific technology and experience, simultaneously, the machining accuracy of motor bearing also needn't be too strict, reduced processing cost, and, also can use general commercially available motor.In addition, owing to be provided with the fin of right part opening around motor, it is big that the surface area around the motor becomes, and improved the radiating effect to the outside, because cooling fan etc. needn't be set, the effect that reduces cost arranged.

According to invention 2 described inventions, axle rotates the rotating transmission device that passes to lower shaft on the handle owing to being provided with in the inside of vertical fuselage, motor and rotating transmission device have been separated, on the synchronous belt wearing and tearing powder of the generation in service of Sewing machines and oil can not be attached to motor, prevented the thing of interfere with motor by adhering to of these materials.

According to invention 3 invention, because the work feed governor motion is arranged on vertical fuselage right part open sides, has as easy as rolling off a log assembling and adjust the effect of these work feed governor motions.

Fig. 1 is the profile of horn central portion;

Fig. 2 is the perspective view of vertical fuselage right-hand member;

Fig. 3 is vertical fuselage right end portion enlarged drawing;

Fig. 4 is vertical fuselage right end view elevation;

Fig. 5 is the perspective view of observing from vertical fuselage rear;

Fig. 6 represents the profile of another embodiment horn central portion.

Below with reference to Fig. 1 to Fig. 6 embodiments of the invention are described.

Fig. 1 is the profile of Sewing machines, the 1st, and platen, its upper right side is stood and is being established vertical fuselage 2.The 3rd, horn begins the horizontal-extending setting from the top of vertical fuselage 2.

Shown in Fig. 2, on the right side of described vertical fuselage 2, form square contact-making surface 5, in the screw hole 7 that forms on the described contact-making surface 5 on medium pore 6 and four jiaos.

The 8th, last axle is being supported freely to rotate by the bearing 9 of horn upper support.Left end at last axle 8 is being fixed known counterweight 10, because the rotation of described counterweight 10, transverse arm 11 and shank 12 move up and down.

The 13rd, lower shaft is supported on the platen 1 freely to rotate.

The 14th, synchronous belt hangs over and goes up axle 8 right-hand fixing timing belt pulleys 15 in the vertical fuselage 2 and be fixed on the timing belt pulley 16 of lower shaft 13 right-hand members, constitutes rotating transmission device by these synchronous belts 14, timing belt pulley 15 and timing belt pulley 16.

The 17th, motor, left has motor reel 18 on this motor, the right-hand axle 20 that is provided with fast pulley 19.As shown in Figure 3, be provided with the littler and cylindrical portion 21 that in hole 6, be rotatably assorted of right ports 6 diameters at the left end of this motor 17 than vertical fuselage 2.And this motor 17 is fixed on the contact-making surface 5 than four bigger installing hole 17a of screw 22 diameters that inserted in the screw hole of establishing on four jiaos of contact-making surface 57 by diameter.

The 23rd, as the ring flange of attaching parts, the right-hand member of axle 8 and the motor reel 18 of motor 17 in the connection.

As shown in Figure 4, the 24th, known cloth feeding mechanism is installed in the right-hand member of vertical fuselage 2.And the connecting rod of the handle 28 of the set screw 25 that is screwed on the from one to the other vertical fuselage of this cloth feeding mechanism 24 2 fronts, the regulating part 26 of the free rotational support of vertical fuselage right-hand member, connection regulating part 26 and regulating shaft 27 and the control lever that reverses on cloth feeding direction 30 are formed.

The 4th, fin, cover motor 17 front-back and above, right-hand opening has increased the surface area around the motor, can promote motor 17 heat radiations.

The 31st, cover, be covered with the side of having of fin 4, be fixed on the right-hand member of fin 4 by screw 32.

Shown in Figure 5 33 is the wickets that take out motor 17 cables, the 35th, and the lid of unshowned vertical fuselage 2 back openings in the coverage diagram, fixing by a plurality of screws 36.

More than be formation of the present invention, this formation has following action effect.

When motor rotates,, simultaneously, by motor reel 18 axle 8 is rotated by ring flange 23 by its axle 20 rotating pulleys 19.Rely on the rotation of axle 8 on this, transverse arm 11 and shank 12 move up and down, and simultaneously, rotate lower shaft 13 by synchronous belt 14, drive not shown shuttle and cloth feeding mechanism.

Institute is shown in Figure 4, rotates the set screw 25 of cloth feeding mechanism 24, just can rotate regulating part 26 at the right-hand member of vertical fuselage 2, by connecting rod 29 and handle 28, rotates regulating shaft 27, regulates cloth feed amount.The pressure-controlled bar 30 downwards, by connecting rod 29 and handle 28, rotate regulating shaft 27, the conversion cloth feeding direction.

In the above-described embodiments, as the rotating transmission device that the rotation of last axle 8 is passed to lower shaft 13, though can be transmitted by timing belt pulley 15,16 and synchronous belt 14, this tumbler is become mechanism shown in Figure 6 can be better.

37, the 37th, support member is arranged on the varying level direction of vertical fuselage 2.

The 38th, the longitudinal axis supports above-mentioned support member 37,37 free to rotately.

The 39th, be fixed on the bevel gear on the axle 8, this bevel gear 39 is meshed with the bevel gear 40 that is fixed on the longitudinal axis 38 upper ends.The 41st, be fixed on the bevel gear on the lower shaft 13, this bevel gear 41 is meshed with the bevel gear 42 that is fixed on the longitudinal axis 38 lower ends.

In addition, when with last 8 Rotatable umbrella gears 39, the rotation of last axle 8 is passed to lower shaft 13 by bevel gear 40, the longitudinal axis 38, bevel gear 42, bevel gear 41.

The present invention has following beneficial effect.

Because motor is fixed on the right-hand member of the vertical fuselage 2 of right part opening, compared with prior art, unnecessary have specific technology and an experience, the consolidation of motor is simple, simultaneously, the machining accuracy of motor bearing also needn't be too strict, reduced processing cost, and, have the effect that can use general commercially available motor.

In addition,, have the effect of raising,, the effect that reduces cost is arranged because cooling fan etc. needn't be set to the outside heat radiation owing to around motor, be covered with the fin that surface area increases.And, since the inside of the vertical fuselage of aforementioned right-end openings be provided with on axle rotate the rotating transmission device that passes to lower shaft, motor and rotating transmission device have been separated, on the synchronous belt wearing and tearing powder of the generation in service of Sewing machines and oil can not be attached to motor, prevented the incident of interfere with motor by adhering to of these materials.

In addition, because the work feed governor motion is arranged on vertical fuselage right part open sides, has as easy as rolling off a log assembling and adjust the effect of these work feed governor motions.

Claims

1. A sewing machine directly driven by an upper shaft, comprising:

The vertical body is erected on the table of the sewing machine,

The arm extending horizontally from the top of the vertical fuselage,

The lower shaft, which is freely rotatable and supported on the table,

The upper shaft freely rotatably supported on the machine arm,

a motor having a motor shaft connected to an upper shaft by a connecting member so as to be coaxial with the shaft core of the upper shaft,

It is characterized in that,

The motor is fixed on the right end of the vertical body,

There is provided a cooling fin that covers the front, rear and upper side of the motor fixed to the right end of the vertical body and opens on the right.

2. The sewing machine directly driven by the upper shaft according to claim 1, wherein a rotation transmission device for transmitting the rotation of the upper shaft to the lower shaft is provided inside the vertical body.

3. The sewing machine directly driven by the upper shaft according to claim 1, wherein a cloth feeding adjustment mechanism is arranged on the right side of the vertical machine body.