CN201439567U

CN201439567U - Rotating shuttle for double lock stitch machine

Info

Publication number: CN201439567U
Application number: CN2009201534068U
Authority: CN
Inventors: C·黑克纳; A·彭纳
Original assignee: Duerkopp Adler AG
Current assignee: Duerkopp Adler AG
Priority date: 2008-06-24
Filing date: 2009-06-24
Publication date: 2010-04-21
Anticipated expiration: 2019-06-24
Also published as: KR20100000192U; DE502009000308D1; EP2138622B1; DE102008030002A1; KR200472016Y1; ATE496158T1; JP3153040U; EP2138622A1

Abstract

The utility model relates to a rotating shuttle for a double lock stitch machine. The rotating shuttle comprises a cup-shaped shuttle body (24) and a shuttle casing (21) installed in the shuttle body (24) and used for rotating around an axial line (9); wherein the shuttle casing (21) comprises a bottom (34) and a bearing pin (25) concentric with the axial line (9). A shuttle thread core (26) which can be displaced along the direction of the axial line (9) is arranged on the bearing pin (25). The shuttle thread core (26) is maintained in the inserted position through a locking rod (36). A sliding bearing part (43) is formed between the locking rod (36) and the convex edge (28) of the opposite shuttle core (26) and formed by a continuous annular surface (44) on the convex edge (28) of the shuttle core (26) and a pressure surface (44a) positioned on the locking rod (36), and the pressure surface (44a) is propped against the convex edge (28).

Description

The rotating shuttle that is used for the double-lock type chain stitch sewing machine

Technical field

The utility model relates to a kind of rotating shuttle that is used for the double-lock type chain stitch sewing machine, and this rotating shuttle comprises the cup-shaped shuttle body of being with bobbin case, and this bobbin case is installed in this shuttle body so that around axis rotation, this bobbin case comprises bottom and the fulcrum post concentric with described axis.

Background technology

From DE 19510830C2 (corresponding to JP Hei-8-59-489; KR 7521/1996; CHZL 96104262.1) in the known this rotating shuttle, between bobbin case bottom and adjacent peg or spindle flange, be furnished with braking and unloaded spring.Described braking and unloaded spring are frustoconical, make that this spring can be compressed to the thickness of winding when the shuttle thread peg or spindle is inserted in the bobbin case.In addition, this known rotating shuttle has the locking device that comprises securing rod, and this securing rod can pivot being basically parallel to the unlocked position that described axis extends and being basically perpendicular between the latched position that this axis extends; In latched position, the sphere that is used as brake apparatus radially outwards presses the inside of the hub portion of peg or spindle, thereby brake apparatus is provided.In this embodiment, the tension force of shuttle thread also can change during the peg or spindle rotation, because the linear slit quality is had negative effect, this is undesirable in operation.

The utility model content

The purpose of this utility model provides a kind of rotating shuttle of simplicity of design of general type, and (hook), this rotating shuttle is designed to avoid most possibly the variation of shuttle thread tension force for shuttle, shuttle hook.

According to the utility model, this purpose realizes that by a kind of rotating shuttle that is used for the double-lock type chain stitch sewing machine this rotating shuttle comprises: cup-shaped shuttle body; Be installed in the bobbin case (shuttle casket, bobbin case) that is used in the shuttle body around axis rotation, this bobbin case comprises bottom and the fulcrum post concentric with described axis; Be arranged in the shuttle thread peg or spindle (hook thread bobbin) that is used on the fulcrum post along the displacement of the direction of described axis, this shuttle thread peg or spindle comprise spaced two flanges and on fulcrum post guiding and with the hollow hub portion of described flange interconnections; Be arranged on braking and unloaded spring between described bottom and the shuttle thread peg or spindle; The locking device that comprises securing rod, this securing rod can pivot along the unlocked position that is basically parallel to described axis extension with between the latched position that is basically perpendicular to this axis extension, and this latched position is against relative flange; Be arranged in hole in the face of the flange of securing rod; Wherein, be formed with the sliding supporting part of ring-type between the flange of securing rod and relative shuttle thread peg or spindle, the periphery of this sliding supporting part is continuous, and when being positioned at latched position, securing rod and shuttle thread peg or spindle can only press in the zone of sliding supporting part mutually; Sliding supporting part is formed by the pressure surface regional in the face of the ring-shaped continuous on the flange of securing rod and that be positioned on the securing rod that is positioned at the shuttle thread peg or spindle; In described ring-shaped continuous zone and the described pressure surface at least one is designed to lug boss.

Main points of the present utility model are, form a sliding supporting part between the flange of described bar facing of securing rod and peg or spindle.This sliding supporting part is formed by the annular surface of the continuous unanimity on the flange that is positioned at peg or spindle and surface correspondence, that limit that is positioned on the securing rod, and has consistent frictional behaviour on the whole periphery of peg or spindle.Usually the existing member slot (entrainergroove) of carrying secretly that is used for coil winding machine is arranged in sliding supporting part, does not therefore influence frictional behaviour.

Description of drawings

From following by means of accompanying drawing to the description of embodiment of the present utility model with obvious further feature of the present utility model, advantage and details, wherein:

Fig. 1 is the schematic side elevation that the part of Sewing machines is cut open;

Fig. 2 is the view of cutting open along the Section line II-II among Fig. 3 according to rotating shuttle of the present utility model, is plugged with exercisable shuttle thread peg or spindle in described rotating shuttle;

Fig. 3 is the vertical view of the rotating shuttle of Fig. 2;

Fig. 4 is the view that the rotating shuttle of Fig. 2 is cut open along the Section line IV-IV among Fig. 5, and wherein the shuttle thread peg or spindle is unloaded;

Fig. 5 is the vertical view of the rotating shuttle of Fig. 4;

Fig. 6 is the longitudinal section view of the variant embodiment of shuttle thread peg or spindle;

Fig. 7 is the vertical view of the shuttle thread peg or spindle of Fig. 6; With

Fig. 8 is the braking and the unloaded spring of cylindricality that is applicable to the shuttle thread peg or spindle of Fig. 6.

The specific embodiment

Double-lock type chain stitch sewing machine shown in Figure 1 generally includes upper arm 1, vertical column 2 and bottom shelly substrate 3.Arm axle 4 is installed in arm 1, and the shank 5 with pin 6 can move up and down by means of this arm axle.In addition, arm axle 4 makes 7 motions of line bar.

Vertical rotating shuttle 8 is installed in substrate 3, in other words, can be driven and around the double-lock type stitching rotating shuttle 8 of vertical axis 9 rotation.Carry rotating shuttle 8 and can be mounted for rotation in rotating shuttle support housing 11 around the rotating shuttle driving shaft 10 of axis 9 rotations, this rotating shuttle support housing is arranged in the substrate 3.Revolving rib driving shaft 10 is driven by power transmission shaft 12 by means of bevel gearing 13.12 of power transmission shafts are by means of there being toothed belt transmission device 14 to be driven by arm axle 4.This gearratio that toothed belt transmission device 14 is arranged is 1: 1.Being designed and sized to of bevel gearing 13 makes gearratio reach 1: 2.This means that arm axle 4 or power transmission shaft 12 whenever turn around, rotating shuttle 8 takes two turns.For this reason, the number of teeth that is arranged in the big driving bevel gear 15 on the power transmission shaft 12 is the twice that is arranged in the number of teeth of the driven wheel of differential 16 on the rotating shuttle driving shaft 10.

Above rotating shuttle 8, the needle plate 17 with pin hole 18 is fixed on the upside of substrate 3.Rotating shuttle 8 has spur 19, and this spur is direct through the pin 6 in the pin hole 18 that submerges, and can catch by the needlework 20 of described pin 6 guiding.Bobbin case 21 is installed in rotating shuttle 8, and this bobbin case can rotate freely with respect to rotating shuttle 8 around axis 9.Annular support circle 22 butts of bobbin case 21 are arranged in the support ring 23 on the cup-shaped shuttle body 24 of rotating shuttle 8.Bobbin case 21 is installed according to usual way, thereby can be directed around bobbin case 21 by the needlework 20 that spur 19 is caught.

Shown in Fig. 2 to 4, bobbin case 21 is also roughly cup-shaped.Bobbin case 21 has hollow fulcrum post 25, and this hollow fulcrum post is concentric with the central longitudinal axis 9 of rotating shuttle driving shaft 10 and rotating shuttle 8, and axis 9 also is the axis of described bobbin case 21, and this hollow fulcrum post 25 is admitted shuttle thread peg or spindle 26.Described shuttle thread peg or spindle 26 generally includes hollow hub portion 27, upper flange 28 and lower flange 29.Peg or spindle 26 is being removed the back, had been supplied to shuttle thread 30 before being inserted the bobbin case 21 again from bobbin case 21.

In the hub portion 27 of peg or spindle 26, be formed with the cylindricality dimple 31 of ring-type, this dimple along the direction of fulcrum post 25 to inner opening.The form of being furnished with is the braking and the unloaded spring 32 of cylindrical helical spring in this dimple 31, and this spring is supported in the endless groove 33 in the bottom 34 of bobbin case 21, and centers with respect to axis 9 by ring-type collar 33a.In the hub portion 27 of peg or spindle 26, spring 32 bears against blocking part 31a.

Securing rod 36 as locking device 35 is installed in hollow fulcrum post 25 pivotly, and this securing rod 36 comprises two contact-making

surfaces

37,38 of 90 ° that stagger.These contact-making

surfaces

37,38 are equipped on opposition supporting member 40, and this opposition supporting member is installed in the dimple 39 of fulcrum post 25, so that be shifted along the direction of axis 9, and press one of contact-making

surface

37 or 38 by means of the spiral compression spring 41 of prestrain.As shown in Figure 2, when securing rod 36 pivots about 90 ° the time with respect to axis 9, the contact-making surface 37 of this bar 36 is against opposition supporting member 40, the power that makes peg or spindle 26 be in reverse to be applied by braking and unloaded spring 32 and be shifted towards the bottom 34 of bobbin case 21.As shown in Figure 4, when securing rod 36 basic directions along axis 9 were extended, in other words, when locking device 35 unclamped, contact-making surface 38 made peg or spindle 26 unload from bobbin case 21 by braking and unloaded spring 32 against opposition supporting member 40.In this position, the operator can take off peg or spindle 26 from bobbin case 21.Comparison diagram 2 and Fig. 4 as can be seen, when peg or spindle 26 is inserted into, the braking and unloaded spring 32 be compressed to the maximum possible degree; When locking device 35 was opened, spring 32 loosened, and made peg or spindle 26 substantially in the upward direction from bobbin case 21 unloadings, so that this peg or spindle 26 can be by grasping easily.Shown in Fig. 2 and 4, dimple 31 along axis 9 from lower flange 29 upwards the directions of flange 28 extend across peg or spindle 26 yardstick (extension) about 1/4.But also extensible half that mostly is this axial dimension most that reach of dimple 31 is particularly under the situation hour of the gap size between lower flange 29 and the bottom 34.

Shown in Fig. 2 and 4, peg or spindle 26 thereon in the zone of flange 28-strictly say near hub portion 27-comprise the so-called member slot 42 of carrying secretly, described rotation of carrying the peg or spindle 26 that member slot 42 is used for coil winding machine secretly drives, this coil winding machine shuttle thread 30 that is used to reel.This is carried member slot 42 secretly and engages with the element of carrying secretly of coil winding machine, drives with the rotation of guaranteeing form fit to engage.

Carrying member slot 42 outsides secretly, between the flange 28 of securing rod 36 and peg or spindle 26, radially be formed with sliding supporting part 43, to prevent that securing rod 36 disturbs rotating freely uniformly of peg or spindles 26 in 8 operating periods of rotating shuttle, at every turn when carrying member slot 42 secretly.When securing rod 36 with when therefore the peg or spindle 26 in the bobbin case 21 is in the lock state, this bar 36 and upper flange 28 only are in contact with one another with the pressure surface 44a place that is configured to the lug boss of bar 36 in the annular surface zone 44 of flange 28, and wherein braking of the cylindricality of compression and unloaded spring 32 provide invariable pressure.Therefore, in each rotation of peg or spindle 26, thereby moment of friction and braking moment between securing rod 36 and the shuttle thread peg or spindle 26 also remain unchanged.

Sliding supporting part 43 on radially outer direction with securing rod 36 in recess 45 adjacency, this recess 45 is as the concave type handle.In order to make securing rod 36 move to open position from angled position according to Fig. 4 according to Fig. 2, the operator can be between the upper flange 28 of securing rod 36 and peg or spindle 26 this bar 36 of grasping, and do not need tool using.

Shown in Fig. 3 and 5, be formed with closeer a series of vertical hole 47 in 44 outsides, annular surface zone, these vertical holes 47 extend to the outer edge 46 of flange 28, and evenly distribute on axially the whole of flange.Described vertical hole extends to hub portion 27 always, but the annular surface zone 44 of no show flange 28.These the vertical holes 47 feasible supplies that can observe shuttle thread 30 very exactly.In addition, they have reduced the quality of peg or spindle 26, and have therefore reduced the moment of inertia of peg or spindle 26.

Shuttle thread peg or spindle 26a shown in Fig. 6 and 7 comprises that form is the dimple 31b of endless groove, and this dimple can engage with braking and unloaded spring 32a as shown in Figure 8; Braking shown in Fig. 2 and 4 and unloaded spring 32 comprise the consecutive identical winding of diameter 48, and braking and unloaded spring 32a comprise the winding 48a that one or two diameter reduces in lower zone, so that spring 32 also can on ring-type collar 33a, center-although other winding 48 has bigger diameter, because dimple 31b is designed to endless groove and therefore has bigger diameter with respect to Fig. 2 and 4.Advantage according to the embodiment of Fig. 6 and Fig. 7 is, regardless of the ring-type dimple 31b that is used to brake with unloaded spring 32a, the whole length of leads of shuttle thread peg or spindle 26a on the fulcrum post 25 of bobbin case 21 can both be held.

Also shown in Fig. 6 and 7, sliding supporting part 43 can be designed so that also annular surface zone 44b is the lug boss on the upper flange 28 of shuttle thread peg or spindle 26a.In this case, pressure surface 44a can (but be not must) be formed on the securing rod 36.

Claims

1. the rotating shuttle that is used for the double-lock type chain stitch sewing machine, this rotating shuttle comprises:

-cup-shaped shuttle body (24);

-bobbin case (21), this bobbin case are installed in the shuttle body (24) being used for around an axis (9) rotation, and this bobbin case (21) comprising:

--bottom (34), and

--the fulcrum post (25) concentric with described axis (9);

-shuttle thread peg or spindle (26,26a), this shuttle thread peg or spindle is arranged in fulcrum post (25) and goes up being used for the direction displacement along axis (9), this shuttle thread peg or spindle (26,26a) comprising:

--spaced two flanges (28,29) and

--go up the hollow hub portion (27) that guides at fulcrum post (25), this hollow hub portion and described flange (28,29) interconnection, and

-braking and unloaded spring (32,32a), this braking and unloaded spring be arranged in described bottom (34) and shuttle thread peg or spindle (26,26a) between; With

-comprising the locking device (35) of securing rod (36), this securing rod can pivot being basically parallel to the unlocked position that described axis (9) extends and being basically perpendicular between the latched position that described axis extends, and this latched position is against relative flange (28); And

-be arranged in towards the hole (47) of the flange (28) of securing rod (36),

It is characterized in that,

At securing rod (36) and relative shuttle thread peg or spindle (26, be formed with the sliding supporting part (43) of ring-type between flange 26a) (28), the periphery of this sliding supporting part is continuous, when being positioned at latched position, securing rod (36) and shuttle thread peg or spindle (26,26a) can only in the zone of this sliding supporting part (43), press mutually;

This sliding supporting part (43) by be positioned at the shuttle thread peg or spindle (26,26a) in the face of the ring-shaped continuous zone on the flange (28) of securing rod (36) (44,44b) and the pressure surface (44a) that is positioned on the securing rod (36) form; With

Described ring-shaped continuous zone (44,44b) and described pressure surface (44a) at least one be designed to lug boss.

2. rotating shuttle according to claim 1 is characterized in that,

In the described hub portion (27) of shuttle thread peg or spindle (26), be formed with and carry member slot (42) secretly; With

Described sliding supporting part (43) form carry secretly outside the member slot (42) radially relative with described axis (9).

3. rotating shuttle according to claim 1 and 2 is characterized in that,

Described securing rod (36) comprises a recess (45), and this recess is positioned at a side of facing with contiguous flange (28), and radially relative with described axis (9) outside sliding supporting part (43).