CN217973638U - Transmission case - Google Patents

Abstract

The utility model discloses a transmission case, include: a box body, one side of which is rotatably connected with a driving shaft; the take-up mechanism comprises a lead frame, a take-up lever and a first transmission assembly, wherein the lead frame is provided with a wire guide hole, the take-up lever is positioned beside the lead frame, the drive shaft can drive the take-up lever to reciprocate up and down through the first transmission assembly when rotating, and the take-up lever is provided with a take-up hole; the wire shifting mechanism comprises a wire shifting hook and a second transmission assembly, and the wire shifting hook can be driven by the second transmission assembly to reciprocate along the horizontal direction when the driving shaft rotates; looper mechanism, it includes looper and third transmission assembly, has the threading passageway that extends along its length direction in the looper, and accessible third transmission assembly drives the looper and is close to or keeps away from when the drive shaft rotates and dial the line and collude, the utility model discloses integrate a plurality of functions in an organic whole, greatly made things convenient for the modification to sewing machine to make whole sewing machine more succinct.

Description

Transmission case

Technical Field

The utility model relates to a sewing device especially relates to a transmission case.

Background

During sewing, the existing sewing machine usually uses a rotating shuttle to realize lock type track sewing, a bottom thread needs to be arranged in the rotating shuttle before the rotating shuttle is used, and when the sewing machine is used, the thread in the rotating shuttle needs to be led out to a straight needle and matched with the rotating shuttle to complete the sewing process. When the automatic paying-off device is applied to automatic production, because the paying-off quantity of the bottom line in the rotating shuttle is less, the machine needs to be frequently stopped and replaced, and the production efficiency is seriously influenced.

In order to adapt to automatic production, some sewing machines are provided on the market, which are provided with a thread take-up mechanism, a thread shifting mechanism and the like, an external thread coil can be directly paid off and passes through the thread take-up mechanism, the thread shifting mechanism and the like on the sewing machine, so as to complete locking type track sewing.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a transmission case to solve one or more technical problem that exist among the prior art, provide a profitable selection or create the condition at least.

The utility model provides a solution of its technical problem is:

a transmission case comprising: a box body, one side of which is rotatably connected with a driving shaft; the take-up mechanism comprises a lead frame, a take-up lever and a first transmission assembly, the lead frame is connected to the outer side of the box body, a lead hole is formed in the lead frame, the take-up lever is located on the side of the lead frame, the take-up lever is connected to the driving shaft through the first transmission assembly, the first transmission assembly can drive the take-up lever to reciprocate up and down when the driving shaft rotates, and the take-up lever is provided with a take-up hole; the wire shifting mechanism comprises a wire shifting hook and a second transmission assembly, the wire shifting hook is connected to the driving shaft through the second transmission assembly, and the wire shifting hook can be driven to reciprocate along the horizontal direction by the second transmission assembly when the driving shaft rotates; the looper mechanism, it includes looper and third transmission assembly, have the threading passageway that extends along its length direction in the looper, the looper passes through third transmission assembly connect in the drive shaft, the accessible when the drive shaft rotates third transmission assembly drives the looper is close to or keeps away from dial the line and collude.

The technical scheme at least has the following beneficial effects: the external driving source is connected to the driving shaft, power is input through the driving shaft, the unreeled sewing thread sequentially passes through the thread guide hole, the thread picking hole and the transition hole and then is led out through the thread passing channel, when the external driving source drives the driving shaft to rotate, the power input from the driving shaft drives the thread picking rod to reciprocate up and down through the first transmission assembly, the thread picking hook is driven to reciprocate along the horizontal direction through the second transmission assembly, the curved needle is driven to be close to or far away from the thread picking hook through the third transmission assembly, when the sewing thread passes through the thread guide hole, the thread guide hole plays a role in stabilizing the sewing thread, when the external straight needle moves downwards, the thread picking hook moves along the horizontal direction to pick the sewing thread, the curved needle is far away from the thread picking hook, when the straight needle moves upwards, the thread picking hook resets along the horizontal direction, the curved needle is close to the thread picking hook, the thread picking rod picks up the sewing thread led out from the thread guide hole in the process, the original thread led out from the curved needle is kept in a tensioning state, therefore, sewing tracks can be stably realized, a plurality of sewing thread picking tracks are integrated into a whole sewing machine, and the sewing machine can be conveniently driven and the sewing machine head can be more simply input a plurality of a sewing machine, and the sewing machine head can be more simply changed, and the sewing machine head can be more conveniently.

As a further improvement of the above technical scheme, the first transmission assembly comprises a take-up arm, a take-up shaft, a first eccentric wheel and a take-up transmission member, the take-up shaft is rotatably connected in the box body, the rotation axis of the take-up shaft and the rotation axis of the drive shaft all extend along the left-right direction, the first eccentric wheel is eccentrically connected in the drive shaft, one end of the take-up transmission member is arranged at the outer side of the first eccentric wheel through a first bearing sleeve, the other end of the take-up transmission member is rotatably connected in one end of the take-up arm, the middle part of the take-up arm is connected on the take-up shaft, the take-up lever is connected in the other end of the take-up arm, the outer side wall of the box body is provided with an avoidance hole, the avoidance hole surrounds the rotation axis of the take-up shaft and extends along the up-down direction, the take-up lever is far away from one end of the take-up arm and extends out of the box body from the avoidance hole, and the take-up hole is positioned outside the box body. When the driving shaft rotates, the eccentric wheel is driven to rotate in the thread take-up transmission member, the thread take-up transmission member is sleeved outside the first eccentric wheel through the first bearing sleeve, one end of the thread take-up transmission member is rotatably connected to one end of the thread take-up arm, and the middle part of the thread take-up arm is connected to the thread take-up shaft, so that the power transmitted from the eccentric wheel to the thread take-up arm through the thread take-up transmission member is converted into the up-and-down swinging force for one end of the thread take-up arm, the thread take-up rod moves in the avoiding hole during up-and-down swinging, and the interference between the thread take-up rod and the box body is avoided.

As a further improvement of the above technical solution, the third transmission assembly includes a transmission wheel, a first connecting rod, a second connecting rod and a transmission shaft, the transmission wheel is connected to the driving shaft, one end of the first connecting rod is rotatably connected to the transmission wheel, the other end of the first connecting rod is rotatably connected to one end of the second connecting rod, the transmission shaft is rotatably connected to the outer side of the box body, the curved needle is disposed on the transmission shaft, one end of the transmission shaft extends into the box body and is connected to the other end of the second connecting rod, and the rotation axis of the first connecting rod, the rotation axis of the second connecting rod and the rotation axis of the transmission shaft all extend in the left-right direction. When the driving shaft rotates, the driving wheel is driven to rotate, the rotating wheel drives one end of the first connecting rod to rotate around the driving shaft, the first connecting rod and the second connecting rod form a two-connecting-rod mechanism, continuous unidirectional rotation of the driving shaft can be converted into forward and reverse rotation of the driving shaft, and therefore the curved needle is driven to be close to or far away from the thread shifting hook.

As a further improvement of the technical scheme, the part of the transmission shaft, which is positioned outside the box body, is connected with a transmission seat, and the bent needle is detachably connected with the transmission seat. The transmission seat is used as a transfer structure for installing and connecting the bent needle, and the bent needle can be conveniently disassembled, assembled and replaced.

As a further improvement of the above technical solution, the second transmission assembly includes a wire pulling shaft, a second eccentric wheel, a wire pulling guide rod, a wire pulling transmission member, and a wire pulling block, the wire pulling shaft is rotatably connected in the box, a rotation axis of the wire pulling shaft extends in an up-down direction, the wire pulling shaft and the driving shaft are mutually connected by a gear in a transmission manner, the second eccentric wheel is eccentrically connected to the wire pulling shaft, one end of the wire pulling transmission member is sleeved outside the second eccentric wheel through a second bearing, the wire pulling block is rotatably connected to the other end of the wire pulling transmission member, the rotation axis of the wire pulling block extends in an up-down direction, the wire pulling guide rod is slidably connected to the outside of the box, the wire pulling hook is disposed on the wire pulling guide rod, and one end of the wire pulling guide rod extends into the box and is connected to the wire pulling block. When the drive shaft rotates, power is transmitted to the wire shifting shaft through the gear to drive the wire shifting shaft to rotate, the wire shifting shaft drives the second eccentric wheel to rotate in the wire shifting transmission member, and the wire shifting block is rotatably connected to one end of the wire shifting transmission member, the wire shifting guide rod is connected to the outer side of the box body in a left-right sliding mode and is connected with the wire shifting guide rod and the wire shifting block, so that the rotation of the second eccentric wheel in the wire shifting transmission can be converted into driving the wire shifting guide rod to slide left and right, and the wire shifting hook is driven to reciprocate in the horizontal direction.

As a further improvement of the technical scheme, the part of the wire shifting guide rod, which is positioned outside the box body, is connected with a wire shifting seat, the wire shifting seat is detachably connected with a wire shifting sheet, and the wire shifting sheet is connected with the wire shifting hook. The wire shifting seat is used as a transfer structure for connecting the wire shifting sheet and the wire shifting guide rod, and the wire shifting sheet can be conveniently disassembled, assembled, replaced and maintained.

As a further improvement of the technical scheme, the wire shifting block is connected with at least two wire shifting guide rods. At least two line shifting guide rods can improve the activity limitation on the line shifting block, so that the line shifting block can output the driving force of the horizontal sliding more stably to drive the line shifting guide rods to horizontally slide.

As a further improvement of the above technical solution, the lead frame includes a front lead segment, a transition segment and a rear lead segment, the front lead segment and the rear lead segment are connected to the transition segment at intervals along a front-rear direction, one end of the front lead segment is connected to the box body, the front lead segment and the rear lead segment are both provided with the lead wire holes, and the thread take-up lever is located between the front lead segment and the rear lead segment. The sewing thread firstly passes through the thread guiding hole on the front thread guiding segment and then enters the thread picking hole, and then passes through the thread guiding hole on the back thread guiding segment, so that the sewing thread input before the thread picking action and the sewing thread output after the thread picking action can be respectively stabilized, and the stability of the operations of sewing thread pulling and the like is greatly improved.

As a further improvement of the technical scheme, the curved needle, the wire poking hook, the wire guide hole and the wire picking hole are all arranged in a plurality along the left-right direction. When using, the sewing thread after passing from the wire guide is chosen the line hole through one, and a looper corresponds one and dials the line and collude and realize the concerted action, when the looper, dial the line collude, the wire guide with choose the line hole and have a plurality ofly, can realize the simultaneous working of many needles, greatly improved complete machine work efficiency.

As a further improvement of the above technical solution, the box body is connected with a wire guide plate, the wire guide plate is provided with a transition hole, and the wire guide plate is located between the curved needle and the lead frame. The sewing thread after being picked passes through the transition hole on the thread guide plate, and the transition hole is utilized to realize the functions of transition, reversing, transfer and the like on the sewing thread, so that the thread routing line of the sewing thread is more definite, and the mutual interference between the sewing thread and the internal structure is reduced.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of the internal structure of the box body of the present invention after being partially sectioned;

fig. 3 is a schematic structural diagram after the box body is removed.

In the drawings: 100-box body, 110-driving shaft, 210-lead frame, 211-lead hole, 220-take-up lever, 221-take-up hole, 231-take-up arm, 232-take-up shaft, 233-first eccentric wheel, 234-take-up transmission member, 310-curved needle, 311-threading channel, 321-transmission wheel, 322-first connecting rod, 323-second connecting rod, 324-transmission shaft, 325-transmission seat, 410-dial hook, 421-dial shaft, 422-dial guide rod, 423-dial transmission member, 424-dial block, 430-dial seat, 440-dial piece, 500-lead plate, 510-transition hole and 600-fixing plate.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the directional descriptions, such as the directions or positional relationships indicated by upper, lower, front, rear, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but not for indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.

In the description of the present invention, a plurality of meanings are one or more, a plurality of meanings are two or more, and the terms greater than, smaller than, exceeding, etc. are understood as excluding the number, and the terms greater than, lower than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the terms in the present invention by combining the specific contents of the technical solution.

With reference to fig. 1, 2 and 3, a transmission case comprises a case body 100, in which case body 100 there are mainly integrated three parts: the box body 100 is internally provided with a driving shaft 110 for transmitting external power, the driving shaft 110 can be connected to the side wall of the box body 100 through a bearing, and the thread picking mechanism, the thread pulling mechanism and the curved needle mechanism are driven to move by the power transmitted by the driving shaft 110 to finish the sewing of a locking track.

For the thread take-up mechanism, it includes the lead frame 210, the thread take-up lever 220 and the first transmission component, the lead frame 210 is connected to the outside of the box 100, the lead frame 210 is provided with the thread guide hole 211, the thread take-up lever 220 is located at the side of the lead frame 210, the thread take-up lever 220 is connected to the driving shaft 110 through the first transmission component, the driving shaft 110 can drive the thread take-up lever 220 to reciprocate up and down through the first transmission component when rotating, and the thread take-up lever 220 is provided with the thread take-up hole 221.

For the wire-dialing mechanism, it includes wire-dialing hook 410 and the second transmission component, wire-dialing hook 410 is connected to driving shaft 110 through the second transmission component, and when driving shaft 110 rotates, the second transmission component can drive wire-dialing hook 410 to reciprocate along the horizontal direction.

For the looper mechanism, it includes looper 310 and third transmission component, threading passageway 311 that has its length direction extension in looper 310, and looper 310 passes through the third transmission component to be connected to drive shaft 110, and drive shaft 110 rotates and can drive looper 310 and be close to or keep away from setting thread hook 410 through the third transmission component.

As can be seen from the above, the external driving source is connected to the driving shaft 110, for example, the external driving motor is connected to the driving shaft 110 in a transmission manner, power is input through the driving shaft 110, the unreeled sewing thread sequentially passes through the thread guide hole 211, the thread take-up hole 221, and the transition hole 510 and then is led out through the thread through passage 311, in operation, when the driving shaft 110 is driven to rotate by the external driving source, the power input from the driving shaft 110 drives the thread take-up lever 220 to reciprocate up and down through the first transmission assembly, drives the thread take-up hook 410 to reciprocate in the horizontal direction through the second transmission assembly, drives the looper 310 to approach or be away from the thread take-up hook 410 through the third transmission assembly, when the sewing thread passes through the thread guide hole 211, the thread guide hole 211 plays a role in stabilizing the sewing thread, when the external straight needle moves down, the thread take-up hook 410 moves in the horizontal direction to take off the sewing thread, and the looper 310 is far from the thread take-up hook 410, when the straight needle moves up, the straight needle moves upward, the thread take-up hook 410 is reversely reset, the original straight needle take-up and the sewing needle thread take-out from the thread take-out hole 220 to maintain the integral sewing machine driving function of the sewing needle and the sewing thread take-up operation of the sewing machine, thereby reducing the sewing thread take-up sewing machine, and the sewing machine head.

The first transmission assembly is mainly used for converting the rotational driving force output by the driving shaft 110 into a driving force for driving the thread take-up lever 220 to rotate in a reciprocating manner, and has various structural forms, such as a reciprocating swing mechanism formed by combining a cam and a rocker. In this embodiment, the first transmission assembly includes a thread take-up arm 231, a thread take-up shaft 232, a first eccentric wheel 233 and a thread take-up transmission member 234, two bearing seats may be installed at an inner bottom side of the box body 100, the thread take-up shaft 232 passes through the two bearing seats, so that the thread take-up shaft 232 is rotatably connected to the box body 100, a rotation axis of the thread take-up shaft 232 and a rotation axis of the driving shaft 110 both extend in a left-right direction, the first eccentric wheel 233 is eccentrically connected to the driving shaft 110, a first installation hole is formed in the thread take-up transmission member 234, the first installation hole is installed with the first bearing, the first bearing is sleeved outside the first eccentric wheel 233 through the first bearing, a first shaft sleeve may be installed in the thread take-up transmission member 234, a first positioning pin is connected to the other end of the thread take-up transmission member 234, the first positioning pin is inserted into the first shaft sleeve and is rotatable in the first shaft sleeve, so that the thread take-up transmission member 234 is rotatably connected to one end of the thread take-up arm 231, a middle portion of the thread take-up arm 231 is fixed to the thread take-up shaft 232, the thread take-up lever 220 is connected to the other end of the thread take-up arm 231, and the thread take-up hole 221 is located outside the box body 100.

In this embodiment, when the driving shaft 110 rotates, the eccentric wheel is driven to rotate in the thread take-up transmission member 234, because the thread take-up transmission member 234 is sleeved outside the first eccentric wheel 233 through the first bearing, one end of the thread take-up transmission member 234 is rotatably connected to one end of the thread take-up arm 231, and the middle portion of the thread take-up arm 231 is connected to the thread take-up shaft 232, the power transmitted from the eccentric wheel to the thread take-up arm 231 through the thread take-up transmission member 234 is converted into an up-and-down swinging force on one end of the thread take-up arm 231, and the thread take-up lever 220 at the other end of the thread take-up arm 231 can be driven to swing up and down.

Furthermore, the outer side wall of the box 100 is provided with a avoiding hole, the avoiding hole extends along the up-down direction around the rotation axis of the thread take-up shaft 232, one end of the thread take-up lever 220, which is far away from the thread take-up arm 231, extends out of the box 100 from the avoiding hole, and the thread take-up lever 220 moves in the avoiding hole when swinging up and down, so as to avoid the interference between the thread take-up lever 220 and the box 100.

The third transmission assembly is mainly used for converting the rotational driving force output by the driving shaft 110 into a driving force for driving the curved needle 310 to rotate in a reciprocating manner, and has various structural forms, such as a reciprocating swing mechanism formed by combining a cam and a rocker. In some embodiments, the third transmission assembly includes a transmission wheel 321, a first link 322, a second link 323, and a transmission shaft 324, the transmission wheel 321 is fixed on the driving shaft 110, one end of the first link 322 is rotatably connected to the transmission wheel 321, the other end of the first link 322 is rotatably connected to one end of the second link 323, the rotational connection structure of the first link 322 and the transmission wheel 321, and the rotational connection structure of the first link 322 and the second link 323 can be implemented by a different set of second positioning pins and a second positioning sleeve, the second positioning pins are connected to any one of the first link 322 and the second link 323, the first link 322 and the transmission wheel 321, and the second positioning sleeve is connected to the other one, one end of the transmission shaft 324 can be connected to the outer side of the box 100 through a bearing, the curved needle 310 is fixed on the transmission shaft 324, one end of the transmission shaft 324 extends into the box 100 and is connected to the other end of the second link 323, so that the transmission structure driving the transmission shaft 324 to rotate is located inside the box 100, and the rotation axis of the first link 322, the rotation axis of the second link 323 and the rotation axis of the transmission shaft 324 extend in the left-right direction.

In this embodiment, the driving shaft 110 rotates to drive the driving wheel 321 to rotate, the rotating wheel drives one end of the first link 322 to rotate around the driving shaft 110, and the first link 322 and the second link 323 form a two-link mechanism, which can convert the continuous unidirectional rotation of the driving shaft 110 into the forward and backward rotation of the transmission shaft 324, thereby driving the curved needle 310 to approach or depart from the wire-pulling hook 410.

The curved needle 310 is a rod-shaped structure extending in an arc shape in a direction close to the thread-pulling hook 410, the bottom side of the curved needle 310 is provided with a base for fixing the curved needle 310, in some embodiments, the threading channel 311 may be formed in the arc-shaped extending direction of the curved needle 310 and extend through both ends of the curved needle 310, in some embodiments, the threading channel 311 may be formed from a side away from the thread-pulling hook 410, and a thread outlet communicating with the threading channel 311 is formed at a position of the side wall of the curved needle 310 close to the thread-pulling hook 410, and the sewing thread may be led out from the thread outlet after passing through one end of the threading channel 311.

In the above embodiment, the curved needle 310 can be directly fixed on the transmission shaft 324, and in order to facilitate the assembly and disassembly of the curved needle 310, in the embodiment, the portion of the transmission shaft 324 located outside the box 100 is connected to the transmission seat 325, the curved needle 310 can be detachably connected to the transmission seat 325, and a connector such as a screw or a bolt can be driven into the base to be connected to the transmission seat 325, thereby realizing the relative fixation of the two. Thus, the transmission seat 325 serves as a transfer structure for mounting and connecting the bent pins 310, so that the bent pins 310 can be conveniently disassembled and replaced, and in practical application, a plurality of bent pins 310 can be horizontally arranged on the transmission seat 325.

The second transmission assembly is mainly used for converting the rotational driving force output by the driving shaft 110 into a driving force for driving the wire-poking hook 410 to reciprocate along the horizontal direction, and has various structural forms, such as a reciprocating swing mechanism formed by combining a cam and a rocker. In some embodiments, the second transmission assembly includes a wire pulling shaft 421, a second eccentric wheel, a wire pulling guide 422, a wire pulling transmission member 423, and a wire pulling block 424, the wire pulling shaft 421 is connected to the inner top wall of the box body 100 through a bearing, and a bearing can be additionally provided in the middle of the line-pulling shaft 421 for connecting with the inner side wall of the box 100, thereby realizing stable rotational connection in the cabinet 100, the rotational axis of the thread take-up shaft 421 extends in the up-down direction, bevel gears are respectively fixed on the bottom end of the wire poking shaft 421 and the driving shaft 110, the wire poking shaft 421 and the driving shaft 110 are in transmission connection through the two bevel gears, so that the power of the driving shaft 110 is transmitted to the wire poking shaft 421, a second mounting hole can be arranged in the second eccentric wheel, a bearing is arranged in the second mounting hole, the second eccentric wheel is eccentrically fixed on the wire pulling shaft 421, the second eccentric wheel is fixed in the bearing inner ring of the second mounting hole, the wire shifting block 424 and the wire shifting transmission piece 423 can be matched with a third positioning pin through a third shaft sleeve, the third positioning pin can rotate in the third shaft sleeve, thereby realizing the rotary connection between the wire shifting block 424 and the wire shifting transmission piece 423, one of the third shaft sleeve and the third positioning pin is connected on the wire shifting block 424, the other one is connected to the wire-pulling transmission member 423, the rotation axis of the wire-pulling block 424 extends along the vertical direction, the wire-pulling guide rod 422 is slidably connected to the outside of the box 100, the wire-pulling guide rod 422 can be connected to the outside of the box 100 through a sliding bearing, or a bushing can be installed inside the outside of the box 100, the thread shifting guide rod 422 penetrates through the shaft sleeve to realize sliding, the thread shifting hook 410 is relatively fixed on the thread shifting guide rod 422, one end of the thread shifting guide rod 422 extends into the box body 100 and is connected to the thread shifting block 424, thereby the transmission structure driving the wire-shifting guide rod 422 to move is collected in the box body 100 for protection.

In some embodiments, when the driving shaft 110 rotates, power is transmitted to the wire pulling shaft 421 through the gear to drive the wire pulling shaft 421 to rotate, the wire pulling shaft 421 drives the second eccentric wheel to rotate in the wire pulling transmission member 423, the wire pulling block 424 is rotatably connected to one end of the wire pulling transmission member 423, the wire pulling guide rod 422 is slidably connected to the outer side of the box 100 in the left-right direction, and the wire pulling guide rod 422 is connected to the wire pulling block 424, so that the rotation of the second eccentric wheel in the wire pulling transmission can be converted into driving the wire pulling guide rod 422 to slide left and right, and the wire pulling hook 410 is driven to reciprocate in the horizontal direction.

In practical applications, the first eccentric wheel 233 and the second eccentric wheel may have the same structure, and the specific first eccentric wheel 233 includes two annular sleeves and two arc-shaped sleeves, which are axially disposed, and an eccentric hole is formed on the annular sleeve, through which the driving shaft 110 or the wire pulling shaft 421 can pass, so as to be eccentrically connected to the driving shaft 110 or the wire pulling shaft 421, and an inner ring of the first bearing or the second bearing is sleeved on the annular sleeve, and in addition, the arc-shaped sleeve is connected to an end surface of the annular sleeve, and a through hole is formed on the arc-shaped sleeve, and a transmission member, such as a bolt, a transmission key, is driven into the through hole and connected to the driving shaft 110 or the wire pulling shaft 421, so that the first eccentric wheel 233 and the second eccentric wheel can be better synchronously connected, and can be conveniently mounted into the wire picking transmission member 234 or the wire pulling transmission member 423. The annular sleeve and the arc-shaped sleeve can be designed in a split mode or can be cast integrally.

In order to relatively fix the wire poking hook 410 on the wire poking shaft 421, the wire poking seat 430 is connected to the portion of the wire poking guide rod 422 located outside the box body 100, the wire poking piece 440 is detachably connected to the wire poking seat 430, and the wire poking hook 410 is connected to the wire poking piece 440. The wire shifting base 430 is used as a transfer structure for connecting the wire shifting piece 440 and the wire shifting guide rod 422, the wire shifting piece 440 can be conveniently disassembled, replaced and maintained, and in addition, the wire shifting piece 440 can be driven into connecting pieces such as screws or bolts, so that the wire shifting piece is relatively fixed on the wire shifting base 430. In practical applications, the wire-dialing hook 410 and the wire-dialing piece 440 may be designed in a split manner, or a portion of the wire-dialing piece 440 extends out, and the wire-dialing hook 410 and the wire-dialing piece 440 are designed in an integrated manner. The thread-pulling piece 440 is horizontally disposed, and the thread-pulling hook 410 faces to a side away from the box 100 on the thread-pulling piece 440.

In order to improve the motion stability of the wire shifting block 424, in the embodiment, at least two wire shifting guide rods 422 are connected to the wire shifting block 424. The wire shifting guide rods 422 can improve the activity limitation of the wire shifting block 424, so that the wire shifting block 424 can output the driving force of the left-right sliding more stably to drive the wire shifting guide rods 422 to slide left and right. In practical applications, only one wire-pulling guide rod 422 may be used to connect to the wire-pulling seat 430, while the other wire-pulling guide rod 422 only slides left and right on the box 100, or two wire-pulling guide rods 422 may be used to connect to the wire-pulling seat 430 at the same time.

In the above embodiment, the lead frame 210 may be only located on one side of the thread take-up lever 220, for example, on one side of the sewing thread before entering the thread take-up lever 220, and in order to further improve the feeding stability of the sewing thread, in this embodiment, the lead frame 210 includes a front lead segment, a transition segment and a rear lead segment, the front lead segment and the rear lead segment are connected to the transition segment at intervals along the front-rear direction, one end of the front lead segment is relatively fixed on the box 100, a screw may be inserted into one end of the front lead segment away from the transition segment, the whole lead frame 210 is fixed on the box 100 by pressing the screw, a slot extending along the up-down direction may be further provided on the front lead segment, and the screw is connected to the box 100 after passing through the slot, so that the height of the lead frame 210 can be adjusted before use, the use is more flexible, both the front lead segment and the rear lead segment are provided with a wire hole 211, and the thread take-up lever 220 is located between the front lead segment and the rear lead segment.

In this embodiment, the sewing thread passes through the thread guide 211 of the front thread guide, enters the thread take-up hole 221, and then passes through the thread guide 211 of the rear thread guide, so that the sewing thread input before the thread take-up operation and the sewing thread output after the thread take-up operation can be stabilized, and the smoothness of the operations of sewing thread taking-up and the like can be greatly improved.

In use, a sewing thread passing through the thread guide 211 passes through one thread picking hole 221, and one looper 310 cooperates with one thread pulling hook 410, and corresponds to one thread picking hole 221, the thread guides 211 corresponding to the front and rear sides of the thread picking hole 221, one looper 310 and one thread pulling hook 410 in one group, in this embodiment, a plurality of loopers 310, thread pulling hooks 410, thread guides 211 and thread picking holes 221 are arranged in the left-right direction. When the curved needle 310, the wire poking hook 410, the wire hole 211 and the wire picking hole 221 are provided with a plurality of needles, a plurality of working groups can be formed, so that the needles can work simultaneously, and the working efficiency of the whole machine is greatly improved.

In order to better guide the sewing thread, in this embodiment, the case 100 is connected with a thread guide plate 500, the thread guide plate 500 is provided with a transition hole 510, and the thread guide plate 500 is located between the looper 310 and the thread guide frame 210. The sewing thread after being picked up passes through the transition hole 510 on the thread guide plate 500, and the transition hole 510 is used for realizing the functions of transition, reversing, transfer and the like on the sewing thread, so that the sewing thread routing line is clearer, and the mutual interference between the sewing thread and the internal structure is reduced. In practical applications, the transition hole 510 may have a plurality of holes, each of which matches a different working group.

In some embodiments, a fixing plate 600 may be further disposed on the other side of the transmission shaft 324, the fixing plate 600 is relatively fixed to one side of the box 100 through a fixing rod, an installation space is formed between the fixing plate 600 and the box 100, and structural members located outside the box 100, such as the thread take-up lever 220, the lead frame 210, the looper 310, and the thread pulling hook 410, may be disposed in the installation space to better protect the structure, and the transmission shaft 324 may be rotatably connected to the fixing plate 600 through a bearing, so as to further improve the stability of the movement of the transmission shaft 324.

The bearing, the first bearing and the second bearing mentioned in the above embodiments are all rolling bearings, which are mainly used for reducing the relative friction between two structural members, and mainly include an outer ring, an inner ring and a rolling body, wherein the rolling body is located between the outer ring and the inner ring, the structural member sleeved on the outer side is connected to the outer side of the outer ring, the structure located on the inner side is connected to the inner side of the inner ring, and the friction between the two during relative rotation can be reduced by the rolling body.

While the preferred embodiments of the present invention have been described in detail, it is to be understood that the invention is not limited thereto, and that various equivalent modifications and substitutions may be made by those skilled in the art without departing from the spirit of the present invention, and the equivalents thereof are intended to be encompassed by the scope of the appended claims.

Claims (10)

1. A transmission case, its characterized in that: the method comprises the following steps:

a case (100) having a drive shaft (110) rotatably connected to one side thereof;

the take-up mechanism comprises a lead frame (210), a take-up lever (220) and a first transmission assembly, wherein the lead frame (210) is connected to the outer side of the box body (100), a lead hole (211) is formed in the lead frame (210), the take-up lever (220) is located beside the lead frame (210), the take-up lever (220) is connected to the driving shaft (110) through the first transmission assembly, the driving shaft (110) can drive the take-up lever (220) to reciprocate up and down through the first transmission assembly when rotating, and a take-up hole (221) is formed in the take-up lever (220);

the wire poking mechanism comprises a wire poking hook (410) and a second transmission assembly, the wire poking hook (410) is connected to the driving shaft (110) through the second transmission assembly, and the driving shaft (110) can drive the wire poking hook (410) to reciprocate along the horizontal direction through the second transmission assembly when rotating;

looper mechanism, it includes looper (310) and third transmission assembly, threading passageway (311) that have in looper (310) and extend along its length direction, looper (310) pass through third transmission assembly connect in drive shaft (110), accessible when drive shaft (110) rotates third transmission assembly drives looper (310) is close to or keeps away from dial line and collude (410).

2. A gear box according to claim 1, characterised in that: first transmission component includes take-up arm (231), take-up shaft (232), first eccentric wheel (233) and take-up driving medium (234), take-up shaft (232) rotate connect in box (100), the rotation axis of take-up shaft (232) with the rotation axis of drive shaft (110) all extends along left right direction, first eccentric wheel (233) eccentric connect in on drive shaft (110), the one end of take-up driving medium (234) is located through first bearing housing the outside of first eccentric wheel (233), the other end of take-up driving medium (234) rotate connect in the one end of take-up arm (231), the middle part of take-up arm (231) connect in on take-up shaft (232), take-up lever (220) connect in the other end of take-up arm (231), the lateral wall of box (100) is provided with dodges the hole, dodge the hole and encircle the rotation axis of take-up shaft (232) extends along upper and lower direction, take-up lever (220) are kept away from the one end of take-up arm (231) dodge the hole 221 stretch out outside the box (100), take-up shaft (100) is located outside the box (100).

3. A gear box according to claim 1, wherein: the third transmission assembly comprises a transmission wheel (321), a first connecting rod (322), a second connecting rod (323) and a transmission shaft (324), the transmission wheel (321) is connected to the driving shaft (110), one end of the first connecting rod (322) is rotatably connected to the transmission wheel (321), the other end of the first connecting rod (322) is rotatably connected to one end of the second connecting rod (323), the transmission shaft (324) is rotatably connected to the outer side of the box body (100), the curved needle (310) is arranged on the transmission shaft (324), one end of the transmission shaft (324) extends into the box body (100) and is connected to the other end of the second connecting rod (323), and the rotation axis of the first connecting rod (322), the rotation axis of the second connecting rod (323) and the rotation axis of the transmission shaft (324) extend in the left-right direction.

4. A gear box according to claim 3, wherein: the transmission shaft (324) is connected with a transmission seat (325) at the part outside the box body (100), and the bent needle (310) is detachably connected with the transmission seat (325).

5. A gear box according to claim 1, wherein: the second transmission assembly comprises a wire pulling shaft (421), a second eccentric wheel, a wire pulling guide rod (422), a wire pulling transmission member (423) and a wire pulling block (424), the wire pulling shaft (421) is rotatably connected into the box body (100), the rotation axis of the wire pulling shaft (421) extends in the up-down direction, the wire pulling shaft (421) is connected with the driving shaft (110) in a transmission mode through gears, the second eccentric wheel is eccentrically connected onto the wire pulling shaft (421), one end of the wire pulling transmission member (423) is sleeved on the outer side of the second eccentric wheel through a second bearing, the wire pulling block (424) is rotatably connected onto the other end of the wire pulling transmission member (423), the rotation axis of the wire pulling block (424) extends in the up-down direction, the wire pulling guide rod (422) is slidably connected onto the outer side of the box body (100), the wire pulling hook (410) is arranged on the wire pulling guide rod (422), and one end of the wire pulling guide rod (422) extends into the box body (100) and is connected onto the wire pulling block (424).

6. A gear box according to claim 5, characterised in that: the part of the wire poking guide rod (422) outside the box body (100) is connected with a wire poking seat (430), a wire poking sheet (440) is detachably connected to the wire poking seat (430), and the wire poking sheet (440) is connected with the wire poking hook (410).

7. A gear box according to claim 5, characterised in that: the wire shifting block (424) is connected with at least two wire shifting guide rods (422).

8. A gear box according to claim 1, wherein: the lead frame (210) comprises a front lead section, a transition section and a rear lead section, the front lead section and the rear lead section are connected to the transition section at intervals in the front-rear direction, one end of the front lead section is connected to the box body (100), the front lead section and the rear lead section are both provided with the lead holes (211), and the take-up lever (220) is located between the front lead section and the rear lead section.

9. A gear box according to any of claims 1 to 8, wherein: the curved needle (310), the wire poking hook (410), the wire hole (211) and the wire picking hole (221) are all arranged in a plurality along the left-right direction.

10. A gear box according to any of claims 1 to 8, wherein: the box body (100) is connected with a wire guide plate (500), a transition hole (510) is formed in the wire guide plate (500), and the wire guide plate (500) is located between the bent needle (310) and the lead frame (210).

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