CN214655661U

CN214655661U - Thread releasing mechanism of sewing machine

Info

Publication number: CN214655661U
Application number: CN202120548886.9U
Authority: CN
Inventors: 潘兵; 陈美正; 杨金娣; 田世隆; 卓洋
Original assignee: Zhongjie Sewing Machine Co Ltd
Current assignee: Zhejiang Zoje Sewing Machine Co Ltd; Zhongjie Sewing Machine Co Ltd
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2021-11-09
Anticipated expiration: 2031-03-17

Abstract

The utility model provides a thread loosening mechanism of sewing machine belongs to sewing machine technical field. The thread releasing device solves the problems that an existing thread releasing device is complex and inconvenient to install on a sewing machine shell and the like. This sewing machine's thread loosening mechanism, install on sewing machine's casing, including the mounting bracket, thread loosening board and cylinder, be provided with a plurality of thread loosening jack catch on the thread loosening board, the piston rod and the thread loosening board of cylinder are connected, the mounting bracket includes body board and fixed stabilizer blade, fixed stabilizer blade is located the rear of body board and a body coupling is on the lower edge of body board, thread loosening board and cylinder are all connected on the body board, fixed stabilizer blade pastes and leans on the upper surface of casing and passes through fixing bolt fixed connection, set up on the fixed stabilizer blade and be banding locating hole along what the fore-and-aft direction extended, fixing bolt passes behind the locating hole and casing threaded connection. The thread releasing mechanism is fast and convenient to install on the sewing machine shell.

Description

Thread releasing mechanism of sewing machine

Technical Field

The utility model belongs to the technical field of sewing machine, a sewing machine's thread slackening mechanism is related to.

Background

The sewing machine is a machine for sewing a sewing material through a sewing thread, and comprises a needle rod mechanism, a thread take-up mechanism, a feeding mechanism, a thread hooking mechanism, a pressing mechanism, a thread clamping device and the like. A thread clamping device of a sewing machine, also called a thread clamp, is a device capable of applying pressure to a sewing thread and adjusting the pressure, and is generally provided on a machine head. Correspondingly, the sewing machine is also provided with a thread releasing mechanism for releasing the thread, namely the thread releasing mechanism acts on the thread clamping device to enable the thread clamping device to release the thread.

Chinese patent literature discloses a pneumatic thread releasing device of overedger [ application number: 201120051187. X; the notice number is: 202007317U ]: including the pine line jack catch, the facial line ball board side can be inserted to the pine line jack catch, and the pine line jack catch can insert promptly and loosen the line between two facial line ball boards. A micro piston cylinder mechanism is fixedly arranged on the overedger shell close to the upper thread tension plate, a piston shaft of a cylinder is vertical to a rotating shaft of the upper thread tension plate of the overedger, an air inlet hole of the cylinder is communicated with a compressed air source and is controlled by an electromagnetic air control valve, and a thread loosening clamping jaw is fixedly arranged on the piston shaft through a threaded connecting piece and pushes the upper thread tension plate to axially displace along with a piston.

When the pneumatic thread releasing device is installed on a shell of a sewing machine, a cylinder is required to be installed and fixed on the shell of the sewing machine firstly, the position of the cylinder is adjusted to enable a piston shaft of the cylinder to be perpendicular to a rotating shaft of a thread pressing plate, then a thread releasing clamping jaw is installed on the shell of the sewing machine, the position of the thread releasing clamping jaw is adjusted to enable the thread releasing clamping jaw to be accurately inserted into and moved out of a space between the two thread pressing plates, and finally the thread releasing clamping jaw is fixedly connected with the piston shaft of the cylinder through a threaded connecting piece. Therefore, when the pneumatic thread releasing device is installed on the shell of the sewing machine, the air cylinder and the thread releasing claw need to be independently fixed on the shell, and the air cylinder and the thread releasing claw need to be connected on the shell, so that the pneumatic thread releasing device is complicated and inconvenient to install on the shell of the sewing machine.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide a sewing machine's thread slacking mechanism, the technical problem of solution makes the swift convenience of installation of thread slacking mechanism on sewing machine casing.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a sewing machine's thread loosening mechanism installs on sewing machine's casing, includes thread loosening plate and cylinder, be provided with a plurality of thread loosening jack catch on the thread loosening plate, the piston rod and the thread loosening plate of cylinder are connected, its characterized in that, thread loosening mechanism still includes the mounting bracket, the mounting bracket includes body board and fixed stabilizer blade, fixed stabilizer blade is located the rear of body board and a body coupling is on the lower edge of body board, thread loosening plate and cylinder are all connected on the body board, fixed stabilizer blade pastes and leans on the upper surface of casing and through fixing bolt fixed connection, set up on the fixed stabilizer blade along the fore-and-aft direction extension be banding locating hole, fixing bolt passes behind the locating hole and casing threaded connection.

Before the thread releasing mechanism is installed on a shell of the sewing machine, the air cylinder and the thread releasing plate are connected to a body plate of the installation frame to enable the thread releasing mechanism to form a whole. Therefore, when the thread releasing mechanism is installed on the shell of the sewing machine, the assembled thread releasing mechanism is integrally placed above the shell, the lower surface of the fixed supporting leg is attached to the upper surface of the shell, the fixed bolt penetrates through the positioning hole and then is in threaded connection with the shell, and the fixed bolt is screwed to fix the installation frame. When the position of the mounting frame needs to be adjusted forwards and backwards to enable the thread loosening clamping jaws on the thread loosening plate to face between the two thread pressing plates, the fixing bolts do not need to be screwed down firstly during installation, and the fixing bolts are screwed down after the position of the mounting frame is adjusted forwards and backwards. Therefore, when the thread releasing mechanism is installed on the sewing machine shell, the connection operation of two parts of the cylinder and the thread releasing plate is not needed, and only one part of the installation frame is needed to be operated, so that the thread releasing mechanism is quickly and conveniently installed on the sewing machine shell.

In the thread releasing mechanism of the sewing machine, two fixing support legs are provided and are respectively positioned at the left side and the right side of the body plate. Therefore, the thread releasing mechanism can be stably installed on the shell through the installation of the fixed supporting feet, and other additional fixing structures are not needed, so that the thread releasing mechanism is quickly and conveniently installed on the shell of the sewing machine.

In the thread releasing mechanism of the sewing machine, the lower edge of the body plate is bent backward to form a lower edge, the fixing legs are integrally connected to the lower edge, and the upper edge of the body plate is bent backward to form an upper edge. The setting up of going up border and lower border makes the body board form C shape structure, goes up the structural strength that the body board can be strengthened along with lower border to make mounting bracket stable in structure, just can be with the stable installation of thread slacking mechanism on the casing through the fixed stabilizer blade of installation like this, do not need other extra fixed knot to construct, make the installation of thread slacking mechanism on the sewing machine casing swift convenient.

In the thread releasing mechanism of the sewing machine, the cylinder body of the cylinder is hinged to the rear side of the body plate, the body plate is provided with a strip-shaped guide hole extending along the left-right direction, the thread releasing plate is connected to the front side of the body plate, the thread releasing plate is provided with a hinge shaft penetrating through the guide hole, the rear end of the hinge shaft is hinged to a piston rod of the cylinder, the thread releasing plate is provided with a strip-shaped guide hole extending along the left-right direction, and a shaft position screw fixed to the body plate penetrates through the guide hole.

The guide hole, the hinge shaft, the guide hole and the shaft position screw have left and right guide and up and down positioning functions on the thread loosening plate, so that the thread loosening plate is stably connected on the body plate, a connecting structure does not need to be additionally arranged on the shell, the thread loosening plate can be stably and accurately installed on the shell only by installing the installation frame on the shell, and the thread loosening mechanism is fast and convenient to install on the sewing machine shell.

In the thread releasing mechanism of the sewing machine, a pin shaft is fixed on the body plate, a cylinder body of the cylinder is sleeved on the pin shaft, a piston rod of the cylinder is fixed with a joint bearing, and the joint bearing is sleeved on the hinge shaft. The two ends of the cylinder are hinged, and the joint bearing also has the clamping stagnation effect of preventing eccentricity, so that the cylinder is driven flexibly without clamping points, and the thread releasing mechanism runs stably. The setting can also make cylinder simple to operate on the body board like this simultaneously, makes cylinder and loose line board be connected conveniently.

In foretell sewing machine's thread loosening mechanism, round pin epaxial joint has two rands one, and two rands one are located the both sides of cylinder body respectively, the articulated shaft goes up the joint has two rands two, and two rands two are located joint bearing's both sides respectively, round pin axle threaded connection is on the body board, round pin epaxial still threaded connection has fixation nut, fixation nut is located the place ahead of body board and supports and lean on the leading flank of body board. Make the cylinder body axial fixity of cylinder on the round pin axle through rand one, make joint bearing axial fixity on the articulated shaft through rand two, because round pin axle threaded connection is on the body board, can finely tune the position of round pin axle, takes place the jamming when avoiding cylinder drive pine line board, makes the operation of pine line mechanism stable. The fixing nut has a locking effect, so that the pin shaft is stably fixed on the body plate, the pin shaft is prevented from moving, and the thread releasing mechanism is stable in operation.

In the thread releasing mechanism of the sewing machine, two shaft position screws are arranged in the guide hole in a penetrating way. Therefore, the thread loosening plate can be more stably moved leftwards and rightwards, the thread loosening plate is guaranteed not to rotate when moving, and the working stability of the thread loosening mechanism is improved.

In the thread releasing mechanism of the sewing machine, the upper edge is integrally connected with connecting support legs extending backwards, the connecting support legs are fixedly provided with the thread passing frame, and the connecting support legs are provided with two parts and are respectively positioned at the left side and the right side of the body plate. The threading frame is fixed on the mounting bracket through connecting the stabilizer blade, need not additionally set up fixed knot structure and installs the threading frame on the casing, assembles the installation that just can realize the threading frame through fixed mounting bracket on the casing after the threading frame on the mounting bracket, makes threading frame simple to operate on sewing machine's casing.

In the thread releasing mechanism of the sewing machine, the connecting support leg is positioned above the air cylinder, and the air vent joint on the air cylinder extends upwards from between the two connecting support legs. So that the air cylinder is conveniently connected with the vent pipe.

In the thread releasing mechanism of the sewing machine, the thread releasing part in a wedge shape is arranged on the side surface of the thread releasing claw. The thread loosening part is used for being inserted into the thread clamping device to loosen threads, the thread loosening part is wedge-shaped, the thread loosening part can easily enter the thread clamping device, and structural strength is guaranteed.

Compared with the prior art, the utility model has the advantages of it is following:

the thread loosening mechanism is characterized in that the mounting frame is arranged, the air cylinder and the thread loosening plate are fixed on the body plate of the mounting frame, the lower edge of the mounting frame is provided with the fixed supporting leg, the mounting frame is fixed to the upper surface of the shell through the positioning hole in the fixed supporting leg, the air cylinder and the thread loosening plate do not need to be fixed on the shell independently, only the mounting frame needs to be fixed on the shell, and therefore the thread loosening mechanism is convenient and fast to install on the sewing machine shell. Set up border and lower border on the body board, improved the structural strength of mounting bracket. The loose wire plate is connected with a piston rod of the cylinder through a joint bearing, so that the cylinder can be driven flexibly without dead points. Articulated shafts on the thread loosening plate are arranged in the guide holes in a penetrating mode, and shaft position screws on the body plate are arranged in the guide holes in a penetrating mode, so that the thread loosening plate slides stably without swinging. The cylinder body suit of cylinder is epaxial and fixed through rand one at the round pin, simple to operate and fixed stable. The thread loosening part is wedge-shaped, so that the thread loosening part can easily enter the thread clamping device, and the structural strength of the thread loosening clamping jaw is guaranteed.

Drawings

FIG. 1 is a perspective view of the present thread slackening mechanism mounted on a sewing machine housing;

FIG. 2 is a perspective view of the present thread releasing mechanism;

fig. 3 is an exploded view of the present thread releasing mechanism.

In the figure, 1, a housing; 2. a wire clamping device; 4. a mounting frame; 4a, a body plate; 4a1, guide holes; 4b, fixing support legs; 4b1, locating holes; 4c, connecting support legs; 4d, a lower edge; 4e, upper edge; 5. a cylinder; 5a, lugs; 5b, hinge holes; 6. loosening the thread plate; 6a, loosening the thread claw; 6b, a thread loosening part; 6c, a guide hole; 7. a threading frame; 8. a pin shaft; 9. a first clamping ring; 10. hinging a shaft; 11. a knuckle bearing; 12. a second clamping ring; 13. an axial screw; 14. fixing the bolt; 15. a connecting bolt; 16. and (5) fixing the nut.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1 to 3, the sewing machine includes a housing 1, a thread tension device 2 is installed on a front side surface of the housing 1, and a thread releasing mechanism including a mounting frame 4, a cylinder 5 and a thread releasing plate 6 is fixed on an upper surface of the housing 1. The mounting bracket 4 includes a body plate 4a, fixing legs 4b and connecting legs 4c, the fixing legs 4b are located behind the body plate 4a and integrally connected to the lower edge of the body plate 4a, and the connecting legs 4c are located behind the body plate 4a and integrally connected to the upper edge of the body plate 4 a. The fixing legs 4b are two and located on the left and right sides of the body plate 4a, respectively, and the connecting legs 4c are two and located on the left and right sides of the body plate 4a, respectively. The lower edge of the body plate 4a is bent backwards to form a lower edge 4d, the upper edge of the body plate 4a is bent backwards to form an upper edge 4e, and the arrangement of the upper edge 4e and the lower edge 4d enables the body plate 4a to form a C-shaped structure. The fixing leg 4b is integrally connected to the lower edge 4d, and the connecting leg 4c is integrally connected to the upper edge 4 e. The fixing legs 4b are attached to the upper surface of the housing 1 and fixedly connected to each other by fixing bolts 14, each fixing leg 4b is provided with a strip-shaped positioning hole 4b1 extending in the front-rear direction, and the fixing bolt 14 passes through the positioning hole 4b1 and then is threadedly connected to the housing 1. Connect and be fixed with through wires frame 7 on the stabilizer blade 4c, through wires frame 7 through connecting bolt 15 fixed connection on connecting stabilizer blade 4c, connecting bolt 15 pass through behind the through wires frame 7 with connecting stabilizer blade 4c threaded connection.

The wire loosening plate 6 and the air cylinder 5 are both connected to the body plate 4a, and the cylinder body of the air cylinder 5 is hinged to the rear of the body plate 4 a. The body plate 4a is fixed with a pin shaft 8, and the cylinder body of the air cylinder 5 is sleeved on the pin shaft 8. The pin shaft 8 penetrates through and is in threaded connection with the body plate 4a, the front end of the pin shaft 8 is also in threaded connection with a fixing nut 16, and the fixing nut 16 is located in front of the body plate 4a and abuts against the front side face of the body plate 4 a. The cylinder body of the air cylinder 5 is provided with two opposite lugs 5a, the two lugs 5a are provided with hinge holes 5b which are coaxially arranged, and the pin shaft 8 penetrates through the hinge holes 5 b. The first pin shaft 8 is provided with two first clamping grooves, clamping rings 9 are clamped in the two first clamping grooves respectively, and the two clamping rings 9 are located on the outer sides of the two lugs 5a respectively.

The wire loosening plate 6 is connected to the front of the body plate 4a, and a piston rod of the cylinder 5 is connected with the wire loosening plate 6. The body plate 4a is provided with a strip-shaped guide hole 4a1 extending along the left-right direction, the thread loosening plate 6 is provided with a hinge shaft 10 penetrating through the guide hole 4a1, the rear end of the hinge shaft 10 is hinged with a piston rod of the air cylinder 5, the thread loosening plate 6 is provided with a strip-shaped guide hole 6c extending along the left-right direction, and a shaft position screw 13 fixed on the body plate 4a penetrates through the guide hole 6 c. In this embodiment, two shaft screws 13 are inserted into the guide holes 6 c. The extending end of the piston rod of the cylinder 5 is fixed with a joint bearing 11, and the joint bearing 11 is sleeved on the hinge shaft 10. Two clamping grooves II are arranged on the hinge shaft 10, clamping rings II 12 are clamped in the two clamping grooves II respectively, and the two clamping rings II 12 are located on two sides of the knuckle bearing 11 respectively. Round pin axle 8 and articulated shaft 10 parallel arrangement, cylinder 5 can rotate around round pin axle 8 and articulated shaft 10.

The lower extreme of pine board 6 is provided with the pine jack catch 6a that a plurality of stretches out downwards, and the setting of the number of pine jack catch 6a according to the number of thread trapper 2, preferably two pine jack catches 6a in this embodiment to correspond the setting respectively with two thread trappers 2. The side surface of the thread loosening claw 6a is provided with a wedge-shaped thread loosening part 6b, and along with the reciprocating translation of the thread loosening plate 6, the thread loosening part 6b of the thread loosening claw 6a can be inserted between two thread clamping plates of the thread clamping device 2 to loosen the thread or be drawn out from between the two thread clamping plates, so that the thread clamping device 2 clamps the thread again.

Before the thread releasing mechanism is installed on the housing 1 of the sewing machine, the air cylinder 5 and the thread releasing plate 6 are connected to the body plate 4a of the mounting frame 4 to form the thread releasing mechanism as a whole. When installing the thread loosening mechanism on the casing 1 of sewing machine like this, place the whole top of casing 1 of the thread loosening mechanism who assembles, make the lower surface of fixed stabilizer blade 4b paste on the upper surface of casing 1, pass fixing bolt 14 again behind locating hole 4b1 with casing 1 threaded connection, it can to screw up fixing bolt 14 and make mounting bracket 4 fixed. When the position of the mounting frame 4 needs to be adjusted back and forth to enable the thread releasing claws 6a on the thread releasing plate 6 to face between the two upper thread pressing plates, the fixing bolts 14 do not need to be screwed during mounting, and the fixing bolts 14 are screwed after the mounting frame 4 moves back and forth to adjust the position. Therefore, when the thread releasing mechanism is installed on the sewing machine shell 1, the two parts of the air cylinder 5 and the thread releasing plate 6 do not need to be connected, and only one part of the installation frame 4 needs to be operated, so that the thread releasing mechanism is quickly and conveniently installed on the sewing machine shell 1.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a thread loosening mechanism of sewing machine, installs on sewing machine's casing (1), includes thread loosening board (6) and cylinder (5), be provided with a plurality of thread loosening jack catch (6a) on thread loosening board (6), the piston rod and the thread loosening board (6) of cylinder (5) are connected, its characterized in that, thread loosening mechanism still includes mounting bracket (4), mounting bracket (4) include body board (4a) and fixed stabilizer blade (4b), fixed stabilizer blade (4b) are located the rear of body board (4a) and integrative connection is on the lower edge of body board (4a), thread loosening board (6) and cylinder (5) all connect on body board (4a), fixed stabilizer blade (4b) paste and lean on the upper surface of casing (1) and pass through fixing bolt (14) fixed connection, set up on fixed stabilizer blade (4b) and be banding locating hole (4b1) that extend along the fore-and-aft direction, the fixing bolt (14) penetrates through the positioning hole (4b1) and then is in threaded connection with the shell (1).

2. The thread releasing mechanism of a sewing machine according to claim 1, wherein the fixing legs (4b) are provided in two and respectively located at left and right sides of the body plate (4 a).

3. The thread releasing mechanism of a sewing machine according to claim 1, wherein the lower edge of the body plate (4a) is bent backward to form a lower edge (4d), the fixing legs (4b) are integrally connected to the lower edge (4d), and the upper edge of the body plate (4a) is bent backward to form an upper edge (4 e).

4. The thread releasing mechanism of a sewing machine according to any one of claims 1 to 3, wherein the cylinder body of the cylinder (5) is hinged to the rear of the body plate (4a), the body plate (4a) is provided with a strip-shaped guide hole (4a1) extending in the left-right direction, the thread releasing plate (6) is connected to the front of the body plate (4a), the thread releasing plate (6) is provided with a hinge shaft (10) passing through the guide hole (4a1), the rear end of the hinge shaft (10) is hinged to the piston rod of the cylinder (5), the thread releasing plate (6) is provided with a strip-shaped guide hole (6c) extending in the left-right direction, and the shaft screw (13) fixed to the body plate (4a) passes through the thread releasing plate (6 c).

5. The thread releasing mechanism of a sewing machine according to claim 4, wherein a pin shaft (8) is fixed on the body plate (4a), a cylinder body of the cylinder (5) is sleeved on the pin shaft (8), a piston rod of the cylinder (5) is fixed with a joint bearing (11), and the joint bearing (11) is sleeved on the hinge shaft (10).

6. The thread releasing mechanism of a sewing machine according to claim 5, wherein the pin (8) is engaged with two first collars (9), the two first collars (9) are respectively located on two sides of the cylinder body of the cylinder (5), the hinge shaft (10) is engaged with two second collars (12), the two second collars (12) are respectively located on two sides of the joint bearing (11), the pin (8) is screwed on the body plate (4a), the pin (8) is further screwed with a fixing nut (16), and the fixing nut (16) is located in front of the body plate (4a) and abuts against a front side surface of the body plate (4 a).

7. The thread releasing mechanism of a sewing machine according to claim 4, wherein two shaft screws (13) are inserted into the guide hole (6 c).

8. The thread releasing mechanism of a sewing machine according to claim 3, wherein the upper edge (4e) is integrally connected with a connecting leg (4c) extending rearward, the connecting leg (4c) is fixed with the thread passing frame (7), and the connecting legs (4c) are provided in two and respectively located at the left and right sides of the body plate (4 a).

9. Thread releasing mechanism according to claim 8, characterized in that the connection leg (4c) is located above the cylinder (5), the air vent joint on the cylinder (5) projecting upwards from between the two connection legs (4 c).

10. The thread releasing mechanism of a sewing machine according to any of claims 1 to 3, wherein the thread releasing pawl (6a) has a thread releasing portion (6b) having a wedge shape on a side surface thereof.