CN218321904U - Sewing machine head and sewing machine - Google Patents
Sewing machine head and sewing machine Download PDFInfo
- Publication number
- CN218321904U CN218321904U CN202220344933.2U CN202220344933U CN218321904U CN 218321904 U CN218321904 U CN 218321904U CN 202220344933 U CN202220344933 U CN 202220344933U CN 218321904 U CN218321904 U CN 218321904U
- Authority
- CN
- China
- Prior art keywords
- bearing
- transmission
- transmission shaft
- sewing machine
- head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Sewing Machines And Sewing (AREA)
Abstract
The utility model relates to a sewing machine head and sewing machine, including frame, needle bar and be used for driving the vertical actuating system who rises/falls of needle bar, its characterized in that, actuating system includes the transmission shaft that is used for the transmission and connects in the balance crank of transmission shaft one end, and balance crank is provided with first bearing and second bearing respectively along the both sides of transmission shaft length direction, and the transmission shaft passes through rotatable the connection in the frame of first bearing and second bearing; the sewing machine head has a compact structure and a more reasonable design, can effectively improve the stress of the bearing, thereby effectively protecting the bearing, reducing the noise, improving the fatigue resistance of the bearing and prolonging the service life of the bearing, and can reduce the turning radius of the machine head, thereby being more beneficial to the high-speed rotation of the machine head; in addition, the high-speed lifting function of the needle bar is realized.
Description
Technical Field
The utility model relates to a sewing machine technical field, concretely relates to sewing machine aircraft nose and sewing machine.
Background
Sewing machines are commonly used sewing machines, which generally make use of one or more sewing threads to form one or more stitches in a material to be sewn, to interlace or stitch together one or more layers of material; the sewing machine can sew fabrics such as cotton, hemp, silk, wool, artificial fiber and the like and products such as leather, plastic, paper and the like, the sewed stitch is neat and beautiful, flat and firm, the sewing speed is high, the use is simple and convenient, and the sewing machine is widely applied in the sewing industry.
At present, the types of sewing machines are various, but the sewing machines with various structures generally comprise an upper machine head, a lower machine head matched with the upper machine head and a sewing platform for placing sewing materials, wherein the upper machine head is the main part of the sewing machine and generally comprises four mechanisms of material punching, thread hooking, thread taking and feeding and auxiliary mechanisms of winding, material pressing, tooth dropping and the like, and the upper machine head is generally arranged above the sewing platform; the lower head usually includes a rotating shuttle mechanism, and the rotating shuttle mechanism is usually disposed at a position corresponding to the upper head on the sewing platform, so that the rotating shuttle mechanism can be matched with the upper head (specifically, matched with a needle of the upper head) to smoothly complete the sewing work.
A computer sewing machine (or referred to as a 360-degree rotation perfect stitch sewing machine, a computer pattern template sewing machine) with a head capable of rotating 360 degrees is a kind of sewing machine, and is also a commonly used sewing machine, an upper head of the sewing machine can rotate, and the upper head is generally provided with a needle bar and a driving system for driving the needle bar to ascend/descend, the needle bar is vertically arranged on the upper head, the driving system generally comprises a motor, a transmission mechanism, a transmission shaft, a balance crank (or referred to as a balance block), a crankshaft (or a crank), a transmission arm, a transmission rod and a vertical guiding mechanism, as shown in fig. 1, wherein the transmission shaft is generally connected to a frame through two bearings, the motor is in transmission connection with the transmission shaft through the transmission mechanism for driving the transmission shaft to rotate, the balance crank is generally connected to one end of the transmission shaft, the crankshaft is eccentrically connected to the balance crank (i.e., the rotation center of the crankshaft deviates from the rotation center of the transmission shaft), the upper end of the transmission arm is rotatably connected to the crankshaft, the lower end of the transmission rod is generally horizontally arranged, one end of the transmission rod is vertically connected to the vertical guiding mechanism, and the vertical guiding mechanism is used for guiding the movement of the transmission rod along the vertical direction; in actual operation, the driving system can drive the transmission shaft to rotate so as to achieve the purpose of driving the needle rod to ascend/descend along the vertical direction; for the whole upper machine head, the needle rod is usually positioned at the position of the rotation center of the upper machine head, and the upper machine head can rotate, so that the rotation radius of the upper machine head needs to be reduced as much as possible, however, the existing driving system is adopted, and the bearings for supporting the transmission shaft can only be arranged on one side of the balance crank due to structural limitation, as shown in the attached drawing 1, the bearings for supporting the transmission shaft can only be positioned at the position far away from the needle rod, and by adopting the structural design, on one hand, the rotation radius of the whole upper machine head is increased, and the size of the upper machine head is large, so that the rotation of the upper machine head is not facilitated; on the other hand, because at the actual motion in-process, the needle bar can constantly rise/fall under actuating system's drive, and the needle bar can receive frictional force at the action in-process for the bearing that supports the transmission shaft can receive very big load, not only can lead to the bearing to appear easily wearing and tearing, fatigue resistance reduces, the noise is big, life reduces the scheduling problem, and the speed of needle bar is difficult to promote moreover, is unfavorable for realizing high-speed raising and lowering functions, awaits for a long time and solves.
Disclosure of Invention
The utility model discloses an aim at solves current sewing machine aircraft nose, because structural restriction, make among the actuating system the bearing of supporting the transmission shaft all can only install in balanced articulate one side, lead to the bearing to have easy wearing and tearing, anti fatigue strength is low, the noise is big, life reduces the scheduling problem, and lead to the aircraft nose to have the big scheduling problem of radius of gyration, a sewing machine aircraft nose that designs more rationally is provided, not only can effectively improve the atress of bearing, thereby can effectively protect the bearing, reduce the noise, improve the anti fatigue strength of bearing and the life of extension bearing, and can reduce the radius of gyration of aircraft nose, more be favorable to the aircraft nose rotatory, the main design is:
the utility model provides a sewing machine aircraft nose, includes frame, needle bar and is used for driving the actuating system that the needle bar rises/falls vertically, actuating system including be used for driven transmission shaft with connect in the balance crank of transmission shaft one end, balance crank is provided with first bearing and second bearing respectively along transmission shaft length direction's both sides, just the transmission shaft passes through first bearing and second bearing rotatable connect in the frame. In the scheme, the first bearing and the second bearing for supporting the transmission shaft are arranged on the two sides of the balance crank, so that the transmission shaft can be effectively supported and restrained, and the bearing can be arranged at a position closer to the needle rod; on the other hand, can effectively improve the atress condition of bearing and transmission shaft, the bearing is more difficult wearing and tearing at the operation in-process, can effectively prolong the life of bearing, and the fatigue resistance of bearing is higher, and the noise of bearing operation in-process is lower, and in addition, adopt such structural design, the speed of improvement needle bar that can be easier to be favorable to realizing the high-speed raising and lowering functions of needle bar.
In order to solve the problem that the first bearing and the second bearing are inconvenient to be respectively installed on the two sides of the balance crank due to structural limitation, the balance crank further comprises a rotary part and an eccentric block playing a balancing role, and the rotary part is configured with an annular installation surface matched with the first bearing;
the first bearing is arranged on the rotary part through the annular mounting surface, the second bearing is arranged on the transmission shaft, and the first bearing and the second bearing are respectively positioned on two sides of the eccentric block. In the scheme, the center of the eccentric block deviates from the rotation center of the transmission shaft; the annular mounting surface is constructed through the rotary part in the balance crank, and the annular mounting surface is constructed to be matched with the first bearing, so that the inner ring of the first bearing can be mounted on the rotary part through the annular mounting surface, and the outer ring of the first bearing is fixed on the frame, so that the first bearing can be conveniently mounted on one side of the balance crank, and the side is positioned at the end part of the transmission shaft; and the second bearing can be directly installed on the transmission shaft, so that the first bearing and the second bearing after assembly are just positioned on two sides of the eccentric block respectively, and the stress condition of the first bearing and the stress condition of the second bearing are effectively improved by supporting.
Preferably, the rotating part and the eccentric block are integrally formed members, or the balance crank and the transmission shaft are integrally formed members, or the rotating part is connected to the eccentric block through a connecting piece.
Preferably, the balance crank is configured with an installation hole matched with the transmission shaft, the eccentric block is configured with a transverse lock hole, the transverse lock hole is perpendicular to the installation hole and communicated with the installation hole, and the balance crank is sleeved on the transmission shaft through the installation hole and locked on the transmission shaft through a fastener matched with the transverse lock hole. In this scheme, through constructing the mounting hole for the assembly piece can utilize the mounting hole cover to locate the transmission shaft, and through constructing horizontal lockhole, and construct the perpendicular to mounting hole with horizontal lockhole, and communicate with the mounting hole, so that utilize the fastener of the horizontal lockhole of adaptation to lock balance crank, make balance crank and transmission shaft can be connected as an organic wholely, and can rotate in step.
For the convenience of machining and forming, the rotary part is preferably of an annular structure.
Preferably, the eccentric block is a fan-shaped block structure.
Preferably, the transmission shaft is horizontally arranged.
In order to drive the transmission shaft to rotate, the driving system further comprises a motor and a transmission mechanism, wherein the motor is installed on the rack and is in transmission connection with the transmission shaft through the transmission mechanism to drive the transmission shaft to rotate.
In order to improve the stress of the transmission shaft, preferably, the transmission mechanism is used for driving the transmission shaft connected between the first bearing and the second bearing.
Preferably, the transmission mechanism includes a belt transmission mechanism, the belt transmission mechanism includes a driving pulley, a driven pulley and a transmission belt, the driving pulley is connected to an output shaft of the motor, the driven pulley is mounted on the transmission shaft, and the transmission belt is tensioned on the driving pulley and the driven pulley. So that the motor can drive the transmission shaft to rotate through the belt transmission mechanism.
In order to drive the needle bar to vertically ascend/descend by utilizing the rotation of the balance crank, the driving system further comprises a crankshaft, one end of the crankshaft is arranged on the rotary part and is positioned at a position deviating from the rotary center of the transmission shaft. The crankshaft is eccentrically arranged on the rotating part, and when the balance crank rotates under the driving of the transmission shaft, the crankshaft rotates around the rotating center of the transmission shaft, so that the transmission arm can be driven to lift, and the purpose of driving the transmission rod and the needle rod to vertically lift/lower is achieved.
In order to solve the installation problem of the crankshaft, furthermore, the end surface of the rotating part is provided with an assembly hole matched with the crankshaft, the assembly hole is formed at a position deviated from the rotating center of the transmission shaft, and one end of the crankshaft is fixedly arranged in the assembly hole.
In order to lock the crankshaft, at least one end of the rotating part is provided with a bulge protruding outwards, the assembly hole penetrates through the bulge, a lateral lock hole is formed in the side face of the bulge, and the lateral lock hole is communicated with the assembly hole; one end of the crankshaft is inserted into the assembly hole and locked through a fastener matched with the transverse lock hole. Thereby reach the purpose of horizontal locking bent axle, both convenient to detach can prevent effectively again that the bent axle from droing.
In order to solve the problem that the crankshaft is used for driving the needle rod to vertically lift, the driving system further comprises a driving arm, a driving rod and a vertical guide mechanism which is vertically arranged on the machine frame, wherein,
the upper end of the transmission arm is rotatably connected to the crankshaft, and the lower end of the transmission arm is rotatably connected to the transmission rod;
one end of the transmission rod is connected to the needle rod, the other end of the transmission rod is constrained to the vertical guide mechanism, and the vertical guide mechanism is used for guiding the transmission rod to move in the vertical direction. When the balance crank is driven by the transmission shaft to rotate, the crankshaft rotates around the rotation center of the transmission shaft, so that the transmission arm is driven to lift, and the transmission rod and the needle rod can be driven to vertically lift under the restraint and guide effects of the vertical guide mechanism.
The utility model provides a sewing machine, includes the sewing machine aircraft nose, still include with the aircraft nose is mutually supported down the aircraft nose and is used for placing the sewing platform of sewing material, the aircraft nose is installed in sewing platform down, the aircraft nose is installed in sewing platform's support arm to be located sewing platform top adaptation the position department of aircraft nose down. So that the needle of the machine head can be matched with the rotating shuttle mechanism of the lower machine head, and the sewing work can be smoothly completed.
Compared with the prior art, the sewing machine head and the sewing machine provided by the utility model have compact structure and more reasonable design, not only can effectively improve the stress of the bearing, thereby effectively protecting the bearing, playing the roles of reducing noise, improving the fatigue resistance of the bearing and prolonging the service life of the bearing, but also can reduce the turning radius of the head and be more beneficial to the high-speed rotation of the head; in addition, the high-speed lifting function of the needle bar is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on these drawings without inventive efforts.
Fig. 1 is a schematic view of a drive system and a needle bar in a conventional sewing machine head.
Fig. 2 is a front view of a drive system and a needle bar in a sewing machine head according to an embodiment 1 of the present invention.
Fig. 3 is a schematic view of a three-dimensional structure of a driving system and a needle bar in a sewing machine head according to embodiment 1 of the present invention.
Fig. 4 is a schematic view of a three-dimensional structure of a sewing machine head provided by the embodiment of the present invention, in which bearings are respectively disposed on two sides of a balance crank.
Fig. 5 is a schematic view of a three-dimensional structure of a balance crank in a sewing machine head according to embodiment 1 of the present invention.
Fig. 6 is a front view of fig. 5.
Fig. 7 is a schematic diagram of a three-dimensional structure of a balance crank in a sewing machine head according to embodiment 1 of the present invention.
Fig. 8 is a schematic three-dimensional structure diagram of another balance crank in a sewing machine head provided by the embodiment of the present invention 1.
Description of the drawings
First bearing 301 and second bearing 302
A turning part 401, an eccentric block 402, an annular mounting surface 403, a mounting hole 404, a transverse locking hole 405, a mounting hole 406 and a bulge 407.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1
Referring to fig. 2 and 3, the present embodiment provides a head of a sewing machine, which includes a frame for supporting, a needle bar 110, and a driving system, wherein the driving system is disposed on the frame and is in transmission connection with the needle bar 110 for driving the needle bar 110 to move up/down along a vertical direction, so as to complete a sewing operation.
In this embodiment, the frame may be an existing frame, and the driving system includes a motor 100, a transmission mechanism 102, a transmission shaft 103 for transmission, a balance crank 104, a crank, a transmission arm 106, a transmission rod 107, and a vertical guide mechanism 108, wherein,
the motor 100 is mounted to the frame for providing power, and the motor 100 may preferably employ a servo motor, a stepping motor, a pneumatic motor 100, or the like.
As shown in fig. 2 and 3, the transmission shaft 103 is generally horizontally disposed in the rack, and the motor 100 is in transmission connection with the transmission shaft 103 through the transmission mechanism 102, so that the transmission shaft 103 is driven to rotate by the motor 100; in the present embodiment, the transmission mechanism 102 has various embodiments, for example, the transmission mechanism 102 may adopt one or more combinations of a gear transmission mechanism 102, a chain transmission mechanism, and a belt transmission mechanism 102, and in the present embodiment, the transmission mechanism 102 preferably includes the belt transmission mechanism 102, and the belt transmission mechanism 102 includes a driving pulley 201, a driven pulley 202, and a transmission belt 203, wherein, as shown in fig. 2 and 3, the driving pulley 201 may be connected to the output shaft 101 of the motor 100, the driven pulley 202 may be mounted on the transmission shaft 103, and the transmission belt 203 is tensioned on the driving pulley 201 and the driven pulley 202, so that the motor 100 can drive the transmission shaft 103 to rotate through the belt transmission mechanism 102.
As shown in fig. 2 and 3, in the present embodiment, the balance crank 104 is connected to one end of the transmission shaft 103 so as to rotate synchronously with the transmission shaft 103; as shown in fig. 2 and 3, one end of the crank is connected to the balance crank 104 so as to rotate synchronously with the balance crank 104; the upper end of the transmission arm 106 is rotatably connected to the crankshaft 105, the lower end of the transmission arm 106 is rotatably connected to the transmission rod 107, so that the transmission arm 106 is driven to move up/down by the rotation of the crank, in practice, the upper end of the transmission arm 106 may be connected to the crankshaft 105 through a bearing, and the lower end of the transmission arm 106 may also be connected to the transmission rod 107 through a bearing.
As shown in fig. 2 and fig. 3, one end of the transmission rod 107 is connected to the needle bar 110, the other end of the transmission rod 107 is constrained to the vertical guide mechanism 108, the vertical guide mechanism 108 is vertically disposed on the rack, and the vertical guide mechanism 108 is used for guiding the transmission rod 107 to move in the vertical direction, so that when the balance crank 104 is driven by the transmission shaft 103 to rotate, the crankshaft 105 can rotate around the rotation center of the transmission shaft 103, so as to drive the transmission arm 106 to ascend/descend, and further, the transmission rod 107 and the needle bar 110 can be driven to ascend/descend vertically under the constraint and guide effects of the vertical guide mechanism 108.
The vertical guide mechanism 108 has various embodiments, for example, the vertical guide mechanism 108 may be a guide slot 109 configured along the vertical direction, as shown in fig. 2 and 3, one end of the transmission rod 107 is fitted into the guide slot 109, and movably constrained in the guide slot 109 for guiding and constraining purposes; for another example, the vertical guide mechanism 108 may include a sliding block and a sliding rail that are adapted to each other, one end of the transmission rod 107 is connected to the sliding block, and the sliding rail is arranged along the vertical direction and fixed to the rack; as another example, the vertical guide mechanism 108 may include a guide rod arranged in a vertical direction, the guide rod is fixed to the frame, one end of the transmission rod 107 is configured with a guide hole adapted to the guide rod, so that one end of the transmission rod 107 can be sleeved on the guide rod through the guide hole, so that the transmission rod 107 can be raised/lowered in the vertical direction under the constraint of the guide rod; there are other similar embodiments of the vertical guide mechanism 108, which are not illustrated here.
As shown in fig. 2 and fig. 3, in the present embodiment, the transmission shaft 103 may be mounted to the frame through at least two bearings, for example, in the present embodiment, the transmission shaft 103 may be rotatably connected to the frame through a first bearing 301 and a second bearing 302, and the first bearing 301 and the second bearing 302 are respectively disposed on two sides of the balance crank 104 along the length direction of the transmission shaft 103, as shown in fig. 2 to fig. 4, such a structural design is adopted that not only can the transmission shaft 103 be effectively supported and restrained, but also both bearings can be disposed at positions closer to the needle bar 110, on one hand, the distance between the bearing and the needle bar 110 can be effectively reduced, which is beneficial to reducing the turning radius of the upper handpiece and is more beneficial to the rotation of the upper handpiece; on the other hand, can effectively improve the atress condition of bearing and transmission shaft 103 for the bearing is more difficult to wear and tear at the operation in-process, can effectively prolong the life of bearing, the fatigue resistance of bearing also can obtain improving, and the noise of bearing operation in-process can be lower, in addition, because needle bar 110 has frictional force at the in-process of vertical rising/falling, be unfavorable for the speed-up, and after adopting the structure that this embodiment provided, can be easier the speed of improvement needle bar 110, thereby be favorable to realizing the high-speed raising and lowering functions of needle bar 110.
In order to solve the problem of inconvenience in mounting the first bearing 301 and the second bearing 302 on both sides of the balance crank 104 due to structural limitations in the prior art, the present embodiment provides a balance crank 104, wherein the balance crank 104 comprises a rotary part 401 and an eccentric mass 402 for balancing, as shown in fig. 2-7, the rotary part 401 is configured with an annular mounting surface 403 adapted to the first bearing 301, such that the first bearing 301 can be mounted on the rotary part 401 through the annular mounting surface 403, as shown in fig. 2-5, at which time the second bearing 302 can be mounted on the transmission shaft 103, and the first bearing 301 and the second bearing 302 are respectively located on both sides of the eccentric mass 402, as shown in fig. 2-5, in the present embodiment, the center of the eccentric mass 402 is offset from the center of rotation of the transmission shaft 103, so as to play a role in balancing during rotation; while the annular mounting surface 403 is configured by the turning part 401 in the balance crank 104 and the annular mounting surface 403 is configured to fit the first bearing 301 so that the inner ring of the first bearing 301 can be mounted to the turning part 401 through the annular mounting surface 403 and the outer ring of the first bearing 301 can be fixed to the housing, whereby the first bearing 301 can be conveniently mounted to the side of the balance crank 104 which is located at the end of the transmission shaft 103, as shown in fig. 2-5; the second bearing 302 can be directly mounted on the transmission shaft 103, so that the assembled first bearing 301 and the assembled second bearing 302 are just positioned on two sides of the eccentric block 402 respectively, which not only plays a role of supporting, but also can effectively improve the stress condition of the first bearing 301 and the second bearing 302.
For convenience of processing and forming, in implementation, the revolving part 401 may preferably adopt an annular structure, as shown in fig. 4-6, so that a revolving center of the revolving part 401, a center of the annular mounting surface 403, and a revolving center of the transmission shaft 103 may coincide with each other, which is more favorable for realizing high-speed rotation; accordingly, the eccentric mass 402 may preferably have a fan-shaped block structure, as shown in FIGS. 5 to 7.
In order to facilitate the installation of the second bearing 302 and the driven pulley 202, in this embodiment, the transmission shaft 103 may preferably be a stepped shaft.
In the present embodiment, the balance crank 104 has various embodiments, for example, the rotary part 401 and the eccentric block 402 can be integrally formed, as shown in fig. 5-7; for another example, the rotating portion 401 and the eccentric block 402 in the balance crank 104 may be formed separately, and the formed rotating portion 401 and the eccentric block 402 may be connected together by a connecting member (e.g., a bolt) to form the balance crank 104, or may be mounted adjacent to each other on the transmission shaft 103, so as to function as the balance crank 104.
In addition, in this embodiment, the balance crank 104 may be integrally formed with the transmission shaft 103, as shown in fig. 8, or may be detachably mounted to the transmission shaft 103, as shown in fig. 2 to 7, for example, in a preferred embodiment, the balance crank 104 is configured with a mounting hole 404 adapted to the transmission shaft 103, in practice, the mounting hole 404 may be configured at the revolving part 401 and/or the eccentric block 402, for example, in this embodiment, the mounting hole 404 penetrates through the revolving part 401 and the eccentric block 402, as shown in fig. 5 to 7, correspondingly, the balance crank 104 is configured with a transverse locking hole 405, as shown in fig. 7, the transverse locking hole 405 is perpendicular to the mounting hole 404 and is communicated with the mounting hole 404, so that during assembly, the balance crank 104 may be sleeved on the transmission shaft 103 through the mounting hole 404 and may be locked to the transmission shaft 103 through a fastener adapted to the transverse locking hole 405, so that the balance crank 104 and the transmission shaft 103 may be integrally connected and may rotate synchronously; in implementation, the fastening member may be a lock nut, and will not be described in detail later.
In the implementation process, the transverse locking hole 405 may be a threaded hole to fix a fastener, and in addition, a locking hole adapted to the transverse locking hole 405 may also be configured on the transmission shaft 103, the locking hole may be a threaded hole or a smooth hole, and the front end of the fastener may be inserted into the corresponding locking hole through the transverse locking hole 405, so as to achieve the purpose of locking the transmission shaft 103.
In order to improve the stress of the transmission shaft 103, in a preferred embodiment, the transmission mechanism 102 may transmit the transmission shaft 103 connected between the first bearing 301 and the second bearing 302, for example, as shown in fig. 2-4, the driven pulley 202 is mounted on the transmission shaft 103 and located between the balance crank 104 and the second bearing 302.
In a more sophisticated scheme, in order to drive the needle bar 110 to vertically ascend/descend by using the rotation of the balance crank 104, one end of the crankshaft 105 is mounted on the rotation portion 401 and is located at a position deviated from the rotation center of the transmission shaft 103, as shown in fig. 2-4, namely, the crankshaft 105 is eccentrically mounted on the rotation portion 401, when the balance crank 104 is driven by the transmission shaft 103 to rotate, the crankshaft 105 rotates around the rotation center of the transmission shaft 103, so as to drive the transmission arm 106 to ascend and descend, thereby achieving the purpose of driving the transmission rod 107 and the needle bar 110 to vertically ascend/descend.
During assembly, the crankshaft 105 and the assembly hole 406 may be connected by a screw, or the crankshaft 105 may be fixed to the rotary block by a nut; to facilitate the installation of the crankshaft 105, in a further embodiment, the end surface of the turning part 401 is configured with a fitting hole 406 that fits the crankshaft 105, and the fitting hole 406 is configured at a position that is offset from the turning center of the transmission shaft 103, as shown in fig. 4 and 5, so that one end of the crankshaft 105 can be fixedly mounted to the fitting hole 406.
For better locking the assembly hole 406, in a more sophisticated scheme, at least one end of the rotary part 401 is configured with a protrusion 407 protruding outwards, the assembly hole 406 penetrates through the protrusion 407, and the side surface of the protrusion 407 is configured with a transverse locking hole 405, as shown in fig. 4-7, the transverse locking hole 405 is communicated with the assembly hole 406 and can be perpendicular to each other; in the assembling process, one end of the crankshaft 105 can be inserted into the assembling hole 406 and can be locked by a fastener (such as a locking bolt) matched with the transverse locking hole 405, so that the purpose of transversely locking the crankshaft 105 is achieved, the crankshaft 105 is convenient to disassemble, and the crankshaft 105 can be effectively prevented from falling off; in this embodiment, the purpose of the configuration protrusion 407 is to provide space for configuring the assembly hole 406, so as to facilitate the machining and forming of the assembly hole 406, and also facilitate the installation and removal of the fastener during the subsequent use; in practice, the protrusion 407 may be formed only at one end of the rotating portion 401, or may be formed at both ends of the rotating portion 401, as shown in fig. 5 to 7, in order to more securely fix the crankshaft 105.
In a more perfect scheme, the sewing machine head further comprises a take-up lever, one end of the take-up lever can be connected to the crankshaft 105 through a bearing, so that the rotation of the crank can drive the transmission arm 106 and the take-up lever to act simultaneously.
Example 2
This embodiment provides a sewing machine, including the sewing machine aircraft nose in embodiment 1, still include with the aircraft nose is mutually supported down the aircraft nose and is used for placing the sewing platform of sewing material, the aircraft nose is installed in sewing platform down, the aircraft nose is installed in sewing platform's support arm to be located sewing platform top adaptation the position department of aircraft nose down for the eedle of aircraft nose can mutually support with the rotating shuttle mechanism of aircraft nose down, so that smooth completion sewing work.
In practice, the machine head may be fixedly mounted to the support arm or rotatably mounted to the support arm, so that in actual use, the machine head may be driven by the rotating motor 100 to rotate, so as to better fit the lower machine head below.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention.
Claims (10)
1. The utility model provides a sewing machine aircraft nose, includes frame, needle bar and is used for driving the vertical actuating system who rises/falls of needle bar, its characterized in that, actuating system including be used for driven transmission shaft with connect in the balance crank of transmission shaft one end, balance crank is provided with first bearing and second bearing respectively along transmission shaft length direction's both sides, just the transmission shaft passes through first bearing and second bearing rotatable connect in the frame.
2. The sewing machine head as claimed in claim 1, characterized in that the balance crank comprises a rotary part and an eccentric mass acting as a balance, the rotary part being configured with an annular mounting surface adapted to the first bearing;
the first bearing is arranged on the rotary part through the annular mounting surface, the second bearing is arranged on the transmission shaft, and the first bearing and the second bearing are respectively positioned on two sides of the eccentric block.
3. The sewing machine head as claimed in claim 2, wherein the turn portion and the eccentric block are an integrally formed member;
or the rotary part is connected with the eccentric block into a whole through a connecting piece;
or, the rotary part is of an annular structure;
or the eccentric block is of a fan-shaped block structure;
or the balance crank and the transmission shaft are integrally formed components;
or, the balance crank is constructed with an installation hole matched with the transmission shaft, the eccentric block is constructed with a transverse lock hole, the transverse lock hole is perpendicular to the installation hole and communicated with the installation hole, and the balance crank is sleeved on the transmission shaft through the installation hole and locked on the transmission shaft through a fastener matched with the transverse lock hole.
4. The head as claimed in any one of claims 1 to 3, wherein said drive system further comprises a motor and a transmission mechanism, said motor being mounted to said frame and drivingly connected to said drive shaft via said transmission mechanism for driving said drive shaft in rotation.
5. Sewing machine head as claimed in claim 4, characterized in that said drive shaft is arranged horizontally;
and/or the transmission mechanism is in transmission connection with a transmission shaft between the first bearing and the second bearing;
and/or, the transmission mechanism comprises a belt transmission mechanism, the belt transmission mechanism comprises a driving belt wheel, a driven belt wheel and a transmission belt, the driving belt wheel is connected to an output shaft of the motor, the driven belt wheel is installed on the transmission shaft, and the transmission belt is tensioned on the driving belt wheel and the driven belt wheel.
6. The head according to claim 2 or 3, wherein said drive system further comprises a crankshaft, one end of said crankshaft being mounted to said turn portion and located at a position offset from a center of rotation of the drive shaft.
7. The head of a sewing machine according to claim 6, wherein an end face of the turning portion is configured with a fitting hole to which a crankshaft is fitted, the fitting hole being configured at a position deviated from a rotation center of the drive shaft, one end of the crankshaft being fixedly mounted to the fitting hole.
8. The head of a sewing machine according to claim 7, wherein at least one end of the turning portion is configured with a projection projecting outward, the fitting hole penetrates the projection, and a lateral locking hole is configured at a side of the projection, the lateral locking hole communicating with the fitting hole; one end of the crankshaft is inserted into the assembly hole and locked through a fastener matched with the transverse lock hole.
9. The sewing machine head as claimed in claim 6, wherein the drive system further comprises a drive arm, a drive link, and a vertical guide mechanism vertically disposed on the frame,
the upper end of the transmission arm is rotatably connected to the crankshaft, and the lower end of the transmission arm is rotatably connected to the transmission rod;
one end of the transmission rod is connected with the needle rod, the other end of the transmission rod is constrained to the vertical guide mechanism, and the vertical guide mechanism is used for guiding the transmission rod to move along the vertical direction.
10. A sewing machine comprising a head as claimed in any one of claims 1 to 9, and further comprising a lower head cooperating with said head and a sewing platform for receiving material, said lower head being mounted to said sewing platform, said head being mounted to a support arm of said sewing platform and located above said sewing platform in a position adapted to fit said lower head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220344933.2U CN218321904U (en) | 2022-02-21 | 2022-02-21 | Sewing machine head and sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220344933.2U CN218321904U (en) | 2022-02-21 | 2022-02-21 | Sewing machine head and sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218321904U true CN218321904U (en) | 2023-01-17 |
Family
ID=84831926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220344933.2U Active CN218321904U (en) | 2022-02-21 | 2022-02-21 | Sewing machine head and sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218321904U (en) |
-
2022
- 2022-02-21 CN CN202220344933.2U patent/CN218321904U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201762554U (en) | Independent plate-belt embroidery device of embroidery machine | |
| CN218321904U (en) | Sewing machine head and sewing machine | |
| CN218321901U (en) | Balance crank, sewing machine head and sewing machine | |
| CN203741563U (en) | High-speed embroidery machine head component | |
| CN103381972A (en) | Automatic winder mechanism for zipper webbing loom cloth tape | |
| CN208430297U (en) | A kind of oblique-arm type sewing machine feeding mechanism | |
| CN214300650U (en) | Industrial sewing machine feeding mechanism convenient to maintain | |
| CN217104304U (en) | Sewing machine | |
| CN212335464U (en) | Guide bar swinging mechanism and warp knitting machine adopting same | |
| CN208430300U (en) | A kind of sewing machine feed wheel adjustment mechanism | |
| US3911841A (en) | Looptaker drive for a sewing machine | |
| CN213681215U (en) | Rotating seat, lower machine head and sewing machine | |
| CN211284807U (en) | Automatic rear-lifting tugboat structure on sewing machine | |
| CN218812545U (en) | Feeding mechanism for sewing machine | |
| CN2380582Y (en) | Straw-curtain braiding machine | |
| CN218232781U (en) | Shuttle swinging device and 360-degree rotating computer pattern sewing machine | |
| CN2294974Y (en) | Long-stitch sew-machine head | |
| CN218989600U (en) | Flat seaming machine | |
| CN218989590U (en) | Driving mechanism for lifting presser foot of flat seaming machine | |
| CN213624705U (en) | Fixing base, lower machine head and sewing machine | |
| CN216107546U (en) | Sewing machine | |
| CN113957630B (en) | Coiling embroidery device | |
| CN217479716U (en) | Rotating mechanism and sewing machine using same | |
| CN220867672U (en) | Feeding mechanism of sewing machine and sewing machine with feeding mechanism | |
| CN220724502U (en) | Lifting tooth structure of sewing machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |