CN220376914U - Sewing machine with branching hook driving part - Google Patents

Abstract

According to the sewing machine with the branching hook driving part, the branching hook is enabled to swing back and forth on the base through the cooperation of the rotating wheel with the wavy groove and the toggle rod with the ball, a reset component with a spring is not required to be additionally arranged, the size of the base is reduced, meanwhile, the use of parts is reduced, and the production cost of the sewing machine is further reduced; in addition, the rolling arrangement mode of the ball in the groove ensures the accuracy of reciprocating swing of the branching hook during long-term operation, avoids the condition of thread clamping, and further enhances the working stability of the sewing machine.

Description

Sewing machine with branching hook driving part

Technical Field

The utility model relates to the technical field of sewing machines, in particular to a sewing machine with a branching hook driving component.

Background

In the electric sewing machine, the thread separating hook is one of the most important components in the sewing process, and the thread separating hook is matched with the rotating shuttle part to enable the rotating shuttle part to finish thread outgoing and stitch locking operation with the loop knot. In the existing branching hook of the sewing machine, the long-term reciprocating swing motion is required to be carried out on the base in the sewing process, so that the branching hook can be quickly reset after swinging, and a reset component with a spring is independently arranged on the base to carry out the jacking reset operation on the branching hook; in addition, the spring has metal fatigue in capacity in the long-term use process, so that the thread-separating hook is inaccurate in reset or too slow in reset, the thread-clamping condition is easy to occur in the sewing process, and the stability cannot be ensured.

Disclosure of Invention

In order to solve the problems, the technical scheme provides a sewing machine with a branching hook driving part.

In order to achieve the above purpose, the technical scheme is as follows: the utility model provides a take sewing machine of branch hook drive part, includes the base, sets up transmission shaft on the base and set up by the transmission shaft drives rotatory rotating shuttle subassembly on the base be located one side of rotating shuttle subassembly is provided with the branch hook the below of branch hook is connected with the pendulum rod the below of pendulum rod with be connected with drive part between the transmission shaft, its characterized in that, drive part is including the cover establish rotation wheel on the transmission shaft and connect the poking rod on the pendulum rod be provided with wavy recess on the rotation wheel poking rod's one end is provided with can follow the rolling ball of the inner wall of recess.

In some embodiments, a rotating shaft is connected to the bottom of the rotating shuttle assembly, and a meshing transmission structure is arranged between the transmission shaft and the rotating shaft.

In some embodiments, the engagement transmission structure includes a first bevel gear sleeved on the transmission shaft and a second bevel gear disposed at the end of the rotation shaft and engaged with the first bevel gear.

In some embodiments, a mounting cavity is provided on the base, and the engagement transmission structure and the drive member are both disposed within the mounting cavity.

In some embodiments, the gear ratio between the first bevel gear and the second bevel gear is two to one.

In some embodiments, the branching hook comprises a stand column and an arc-shaped hook arranged at the top of the stand column, and the tail end of the stand column is connected with the swing rod.

In some embodiments, the arc-shaped hook has a gap of 1 to 1.5mm from the hook tip of the arc-shaped hook to the rotating shuttle assembly.

The beneficial effects of the application are that:

according to the sewing machine with the branching hook driving part, the branching hook is enabled to swing back and forth on the base through the cooperation of the rotating wheel with the wavy groove and the poking rod with the ball, a reset component with a spring is not required to be additionally arranged, the size of the base is reduced, meanwhile, the use of parts is reduced, and the production cost of the sewing machine is further reduced; in addition, the rolling arrangement mode of the ball in the groove ensures the accuracy of reciprocating swing of the branching hook during long-term operation, avoids the condition of thread clamping, and further enhances the working stability of the sewing machine.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below.

FIG. 1 is an overall view of the present utility model;

FIG. 2 is a schematic view of the internal structure of the present utility model;

FIG. 3 is a schematic illustration of the location of various components in the present utility model;

FIG. 4 is a schematic diagram of the connection of a rotating wheel and a toggle lever in the present utility model;

fig. 5 is a schematic view of a portion of the components of the present utility model.

Reference numerals:

1. a base, 11, a mounting cavity; 2. the transmission shaft, 21, the rotating wheel, 22, the groove, 23 and the first bevel gear; 3. a rotating shuttle assembly 31, a rotating shaft 32 and a second bevel gear; 4. the branching hooks are 41, upright posts, 42 and arc hooks; 5. the swing rod 51, the toggle rod 52 and the ball.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Referring to fig. 1 to 5, a sewing machine with a branching hook driving part includes a base 1 disposed below a workbench of the sewing machine, a transmission shaft 2 disposed on the base 1, and a rotating shuttle assembly 3 disposed on the base 1 and driven to rotate by the transmission shaft 2. A branching hook 4 is arranged on the base 1 and positioned on one side of the rotating shuttle assembly 3, a swing rod 5 is connected below the branching hook 4, and a driving part is connected between the lower part of the swing rod 5 and the transmission shaft 2. The driving part comprises a rotating wheel 21 axially sleeved on the transmission shaft 2 and a poking rod 51 connected to the swing rod 5, a wavy groove 22 is formed in the rotating wheel 21, a ball 52 capable of rolling along the inner wall of the groove 22 is arranged at one end of the poking rod 51, and the ball 52 stretches into the groove 22 and is in clearance fit with the groove 22. During the rotation of the rotating wheel 21, the balls 52 roll along the inner wall of the groove 22 and will drive the toggle rod 51 to swing left and right along with the shape change inside the groove 22.

The working principle of the utility model is that the transmission shaft 2 continuously rotates during operation, and drives the rotating wheels 21 to synchronously rotate together; the balls 52 roll along the inner wall of the groove 22 and reach the wave bottom of the wave-shaped groove 22, and are located in the minimum lift area of the track of the groove 22 at this time, so that the toggle rod 51 drives the swing rod 5 to rotate clockwise, and further the wire-separating hook 4 on the upper part of the swing rod 5 swings clockwise to the right and presses the inner container located on the rotating shuttle assembly 3, so that the inner container rotates anticlockwise, and the bottom wire is pulled out from the rotating shuttle assembly 3. When the rotating wheel 21 continues to rotate, the balls 52 roll along the inner wall of the groove 22 and reach the peak of the wavy groove 22, which is located in the maximum lift region of the track of the groove 22 at this time; the toggle rod 51 drives the swing rod 5 to rotate in the reverse clock direction, so that the branching hook 4 and the liner are separated and reset to the left to return to the initial position, and a coil formed by the upper thread and the drawn bottom thread pass through a gap between the branching hook 4 and the rotating shuttle assembly 3 in an unobstructed manner, and are knotted to form a lock joint. The ball 52 rolls in the groove 22 in the whole course, and the limit of the wavy groove 22 ensures that the amplitude and time of the ball 52 for driving the poking rod 51 to poke left and right each time are very fixed, thereby effectively ensuring the accuracy of the swinging of the wire-dividing hook.

According to the sewing machine with the branching hook driving part, the branching hook 4 swings back and forth on the base 1 through the cooperation of the rotating wheel 21 with the wavy groove 22 and the poking rod 51 with the ball 52, a reset component with a spring is not required to be additionally arranged, the size of the base 1 is reduced, the use of parts is reduced, and the production cost of the sewing machine is further reduced; in addition, the rolling arrangement mode of the ball 52 in the groove 22 ensures the accuracy of reciprocating swing of the branching hook 4 during long-term operation, avoids the condition of thread clamping, and further enhances the working stability of the sewing machine.

In this embodiment, in order to make the transmission shaft 2 better drive the rotating shuttle assembly 3 to rotate together, a rotating shaft 31 is connected to the bottom of the rotating shuttle assembly 3, and a meshing transmission structure is disposed between the transmission shaft 2 and the rotating shaft 31. Specifically, the meshing transmission structure includes a first bevel gear 23 sleeved on the transmission shaft 2 and a second bevel gear 32 disposed at the end of the rotation shaft 31 and meshing with the first bevel gear 23. The transmission ratio between the first bevel gear 23 and the second bevel gear 32 is two to one. The meshing of the two bevel gears ensures the effectiveness of torque transmission of parts in the transmission process, and ensures smoother and stable operation of the rotating shuttle assembly 3.

In this embodiment, the mounting cavity 11 is provided on the base 1, and the engagement transmission structure and the driving component are both disposed in the mounting cavity 11, so that the whole base 1 is more compact; and the lubricating paste for lubricating and cooling can be added into the mounting cavity 11, so that parts are smoother in operation, and the situation of high-temperature damage caused by long-term operation is avoided.

In this embodiment, the branching hook 4 includes a vertical column 41 and an arc-shaped hook 42 disposed on the top of the vertical column 41, and an optimal gap between a hook tip of the arc-shaped hook 42 and the inner container of the rotating shuttle assembly 3 is 1 to 1.5mm; the tail end of the upright 41 is connected with the swing rod 5, if the branching hook 4 is damaged, the upright 41 can be directly separated from the swing rod 5, and the maintenance and the replacement are convenient; and during operation, the swing rod 5 rotates left and right with the upright 41, and the arc-shaped hook 42 arranged above the upright 41 also rotates. When swinging to the right, the hook tip of the arc hook 42 contacts with the inner container of the rotating shuttle assembly 3, so that the inner container is pushed to the anticlockwise direction.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the scope of the present application, but other principles and basic structures are the same or similar to the present application.

Claims (7)

1. The utility model provides a take sewing machine of branch line hook drive part, includes base (1), sets up transmission shaft (2) on base (1) and setting are in by transmission shaft (2) drive rotatory rotating shuttle subassembly (3) on base (1) be located one side of rotating shuttle subassembly (3) is provided with branch line hook (4) the below of branch line hook (4) is connected with pendulum rod (5) the below of pendulum rod (5) with be connected with drive part between transmission shaft (2), its characterized in that, drive part is including the cover establish rotation wheel (21) on transmission shaft (2) and connect stirring rod (51) on pendulum rod (5) be provided with wavy recess (22) on rotation wheel (21) stirring rod (51) one end is provided with can follow inner wall rolling ball (52) of recess (22).

2. A sewing machine with a split hook drive as defined in claim 1, wherein: a rotating shaft (31) is connected to the bottom of the rotating shuttle assembly (3), and a meshing transmission structure is arranged between the transmission shaft (2) and the rotating shaft (31).

3. A sewing machine with a split hook drive as defined in claim 2, wherein: the meshing transmission structure comprises a first conical gear (23) sleeved on the transmission shaft (2) and a second conical gear (32) arranged at the tail end of the rotating shaft (31) and meshed with the first conical gear (23).

4. A sewing machine with a split hook drive as defined in claim 2, wherein: the base (1) is provided with a mounting cavity (11), and the meshing transmission structure and the driving part are both arranged in the mounting cavity (11).

5. A sewing machine with a split hook drive as claimed in claim 3, wherein: the transmission ratio between the first bevel gear (23) and the second bevel gear (32) is two to one.

6. A sewing machine with a split hook drive as defined in claim 1, wherein: the branching hook (4) comprises a stand column (41) and an arc-shaped hook (42) arranged at the top of the stand column (41), and the tail end of the stand column (41) is connected with the swing rod (5).

7. A sewing machine with a split hook drive as defined in claim 6, wherein: the clearance between the hook tip of the arc-shaped hook (42) and the rotating shuttle assembly (3) is 1 to 1.5mm.