Transmission structure of splicing and sewing machine

Abstract

The utility model provides a transmission structure of a sewing machine, and belongs to the technical field of sewing machines. The problem of how to prolong the service life of the splicing machine is solved. According to the transmission structure of the abutted sewing machine, the abutted sewing machine comprises a transmission main shaft connected with a motor, a first tooth frame connecting rod used for driving a tooth frame, a second tooth frame connecting rod, a curved needle shaft connecting rod used for driving a curved needle and an output shaft arranged below the transmission main shaft in parallel, and the transmission structure comprises a first transmission connecting rod, a second transmission connecting rod and a third transmission connecting rod; the output shaft is rotationally connected with a first crank hinged to the first tooth frame connecting rod, a second crank hinged to the second tooth frame connecting rod and a third crank hinged to the curved needle shaft connecting rod, one end of a first transmission connecting rod, one end of a second transmission connecting rod and one end of a third transmission connecting rod are all located on the transmission main shaft, and the other end of the first transmission connecting rod is hinged to the first crank; the other end of the transmission connecting rod II is hinged with the crank II; and the other end of the transmission connecting rod III is hinged with the crank III. The transmission structure of the sewing machine can prolong the service life of the sewing machine.

Description

Technical Field

[0001] The utility model belongs to the technical field of stitching machines and relates to a transmission structure of a stitching machine. Background Art

[0002] A stitching machine is a sewing device used for knitting or woven fabrics in the prior art. For example, a feed tooth feeding device for a sewing machine disclosed in a Chinese patent (authorization announcement number: CN205636056U) specifically includes a first feed tooth rod, a second feed tooth rod, a rocking member, a first feed tooth push-pull rod, a second feed tooth push-pull rod, a rotating shaft driving member, a double-axis transmission rod, a pitch adjustment member and a transmission connecting rod. The rocking member has a first rocking member, the first feed tooth push-pull rod is pivotally connected to the first feed tooth rod and the first rocking member, the rotating shaft driving member is axially connected to a driving member fixed shaft, the double-axis transmission rod connects the first rocking member and the rotating shaft driving member, the pitch adjustment member and the transmission connecting rod are pivotally connected to the driving member fixed shaft, and the transmission connecting rod connects the double-axis transmission rod.

[0003] Combined with the drawings of the reference document Figure 1 and Figure 2 It can be seen that the driving of the feed tooth feeding device is realized by the main shaft 21 cooperating with the first lifting rod 22 and the second lifting rod 23. Figure 1 It is also easy to see that the stitching machine is provided with a driving motor and a driving shaft fixedly connected to the driving end of the driving motor, and the driving shaft is connected to the main shaft 21 through a synchronous belt, thereby realizing the driving control of the feed tooth feeding device.

[0004] But in fact, the above structure has considerable disadvantages. Specifically, the synchronous belt transmission method requires the synchronous belt to be tensioned between the drive shaft and the main shaft. Due to the existence of some components installed between the drive shaft and the main shaft in the sewing machine housing, there is a certain distance between the drive shaft and the main shaft. Therefore, the length of the synchronous belt also needs to be adapted to the distance between the two. However, in order to prevent the synchronous belt from affecting the normal operation of other components or interfering with the installation of other components, its width will not be too wide. After one cycle of use, the synchronous belt will often wear out, and may even cause the synchronous belt to break, seriously affecting the service life of the sewing machine. Summary of the invention

[0005] The purpose of the utility model is to solve the above problems in the prior art and propose a transmission structure of a stitching machine. The technical problem to be solved by the utility model is: how to increase the service life of the stitching machine.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a transmission structure of a sewing machine, the sewing machine includes a transmission main shaft connected to a motor, a tooth frame connecting rod 1 for driving a tooth frame, a tooth frame connecting rod 2 and a bending needle shaft connecting rod for driving a bending needle, and the sewing machine also includes an output shaft arranged parallel to the bottom of the transmission main shaft, characterized in that the transmission structure includes a transmission connecting rod 1, a transmission connecting rod 2 and a transmission connecting rod 3, and the output shaft is rotatably connected with a crank 1 hinged with the tooth frame connecting rod 1, a crank 2 hinged with the tooth frame connecting rod 2 and a crank 3 hinged with the bending needle shaft connecting rod, one end of the transmission connecting rod 1, the transmission connecting rod 2 and the transmission connecting rod 3 are all positioned on the transmission main shaft, the other end of the transmission connecting rod 1 is hinged with the crank 1, the other end of the transmission connecting rod 2 is hinged with the crank 2, and the other end of the transmission connecting rod 3 is hinged with the crank 3.

[0007] In the present application, the tooth frame connecting rod 1 and the tooth frame connecting rod 2 are used to drive the two tooth frames to push and transport the cloth, and the bending needle shaft connecting rod is used to transport the bending needle shaft to realize the sewing work of the stitching machine, and the tooth frame connecting rod 1, the tooth frame connecting rod and the bending needle shaft connecting rod are all driven by a transmission main shaft connected to the motor. On the basis of the above, the difference between the present application and the prior art is that: crank 1, crank 2 and crank 3 are rotatably connected on the output shaft, and are hinged to the tooth frame connecting rod 1 through crank 1, and hinged to the tooth frame connecting rod 2 through crank 2. The crank three and the bending needle shaft connecting rod are hinged, and in addition, a transmission connecting rod one, a transmission connecting rod two and a transmission connecting rod three are also provided. The transmission connecting rod one is hinged to the crank one, the transmission connecting rod two is hinged to the crank two, and the transmission connecting rod three is hinged to the crank three. In this way, the synchronous belt transmission method in the prior art is replaced by the connecting rod transmission method. Under the premise of ensuring that each tooth frame and the bending needle can maintain the original working state, the influence of wear and even breakage of the synchronous belt during the operation of the stitching machine in the prior art is avoided, thereby ensuring the service life of the stitching machine.

[0008] In the transmission structure of the stitching machine, the crank 1, the crank 2 and the crank 3 are limited on the output shaft along the axial direction of the output shaft. Through this arrangement, in the actual working process, the crank 1, the crank 2 and the crank 3 can only swing on the output shaft relative to the circumferential direction of the output shaft, and are effectively limited relative to the axial direction of the output shaft, thereby ensuring smooth transmission and preventing the wear or even bending and fracture of the transmission connecting rod 1, the transmission connecting rod 2 and the transmission connecting rod 3 due to the axial movement of the crank 1, the crank 2 and the crank 3.

[0009] In the transmission structure of the stitching machine, the output shaft is detachably connected with a limiting sleeve 1 and a limiting sleeve 2 along the length direction, the limiting sleeve 1 is located at one end of the output shaft, the limiting sleeve 2 is arranged near the middle of the output shaft, the crank 1 is close to the crank 2, and the crank 1 and the crank 2 are limited between the limiting sleeve 1 and the limiting sleeve 2. As a specific solution, the limiting sleeve 1 and the limiting sleeve 2 are specifically locked on the output shaft by means of screws or positioning pins to ensure the positioning firmness of the limiting sleeve 1 and the limiting sleeve 2. The crank 1 and the crank 2 are connected to the output shaft by means of sleeve connection and are close together, and through the existence of the limiting sleeve 1 and the limiting sleeve 2, the crank 1 and the crank 2 are effectively limited in the axial direction of the output shaft to prevent the crank 1 and the crank 2 from moving on the output shaft.

[0010] In the transmission structure of the stitching machine mentioned above, the output shaft can also be detachably connected with a limiting sleeve three located at the other end of the output shaft, and the output shaft can also be detachably connected with a limiting plate that is U-shaped and close to the limiting sleeve three, and the crank three is limited between the limiting sleeve two and the limiting plate. On the basis of the above scheme, the limiting sleeve three and the limiting plate are also installed on the output shaft by screws or positioning pins, and the limiting sleeve three supports the limiting plate in the axial direction of the output shaft, so that the crank three is limited between the limiting sleeve two and the limiting plate after being sleeved on the output shaft, so as to prevent the crank three from moving on the output shaft. It is worth mentioning that the limiting plate is used as a replaceable standard part in this application. When the crank three is replaced according to the needs, in order to prevent the gap between the limiting sleeve two and the limiting sleeve three from having a dimensional deviation, the user can replace the limiting plates of different lengths to prevent interference.

[0011] In the transmission structure of the stitching machine, one end of the transmission connecting rod 1, the transmission connecting rod 2 and the transmission connecting rod 3 located on the transmission main shaft is eccentrically arranged relative to the axis of the transmission main shaft. This ensures that when the transmission connecting rod 1, the transmission connecting rod 2 and the transmission connecting rod 3 swing, the swinging of these components meets the actual needs of the crank 1, the crank 2 and the crank 3, ensuring that the tooth frame connecting rod 1, the tooth frame connecting rod 2 and the bending needle shaft connecting rod can be driven normally.

[0012] In the transmission structure of the stitching machine, the transmission main shaft is rotatably connected to the housing through a bearing to ensure the smooth rotation of the transmission main shaft.

[0013] Compared with the prior art, the transmission structure of this stitching machine has the following advantages:

[0014] 1. Transmission connecting rod 1 cooperates with crank 1, transmission connecting rod 2 cooperates with crank 2, and transmission connecting rod 3 cooperates with crank 3 to drive tooth frame connecting rod 1, tooth frame connecting rod 2 and tooth frame connecting rod 3, replacing the synchronous belt transmission method in the prior art, effectively avoiding the risk of wear or even breakage of the transmission belt after periodic use, and improving the service life of the stitching machine.

[0015] 2. The limiting sleeve 1 and the limiting sleeve 2 cooperate to limit the crank 1 and the crank 2 along the axial direction of the output shaft, and the limiting sleeve 2 cooperates with the limiting plate and the limiting sleeve 3 to limit the crank 3 along the axial direction of the output shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the transmission structure of the stitching machine.

[0017] Figure 2 yes Figure 1 A partial enlarged view of the center

[0018] Figure 3 It is a structural schematic diagram of the transmission structure of the stitching machine from another perspective.

[0019] Figure 4 It is an exploded view of the output shaft, crank one, crank two, crank three, limit sleeve one, limit sleeve two, limit sleeve three and limit plate.

[0020] In the figure, 1. transmission main shaft; 2. tooth rack connecting rod 1; 3. tooth rack connecting rod 2; 4. bending needle shaft connecting rod; 5. output shaft; 51. crank 1; 52. crank 2; 53. crank 3; 54. limit sleeve 1; 55. limit sleeve 2; 56. limit sleeve 3; 57. limit plate; 6. transmission connecting rod 1; 7. transmission connecting rod 2; 8. transmission connecting rod 3; 9. bearing. DETAILED DESCRIPTION

[0021] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0022] like Figure 1 As shown in the transmission structure of the stitching machine, the stitching machine includes a transmission main shaft 1 fixedly connected to the driving end of the driving motor, a tooth frame connecting rod 1 2 for driving one tooth frame, a tooth frame connecting rod 2 3 for driving the other tooth frame, and a bending needle shaft connecting rod 4 for driving the bending needle. The transmission main shaft 1 is rotatably connected to the casing of the stitching machine through a bearing 9, and is combined with Figure 2 and Figure 3 The stitching machine also includes an output shaft 5 arranged parallel to the transmission main shaft 1. The output shaft 5 is located below the transmission main shaft 1 and is close to the tooth frame connecting rod 1 2, the tooth frame connecting rod 2 3 and the bending needle shaft connecting rod 4.

[0023] like Figure 1-3 As shown, the transmission structure includes a transmission connecting rod 1 6, a transmission connecting rod 2 7 and a transmission connecting rod 3 8, and a crank 1 51, a crank 2 52 and a crank 3 53 are rotatably connected on the output shaft 5, and the transmission connecting rod 1 6, the transmission connecting rod 2 7 and the transmission connecting rod 3 8 are located between the transmission main shaft 1 and the output shaft 5. One end of the transmission connecting rod 1 6, the transmission connecting rod 2 7 and the transmission connecting rod 3 8 is fixed on the transmission main shaft 1, specifically, it is positioned on the transmission main shaft 1 by sleeve connection and clamping positioning, and the ends of the transmission connecting rod 1 6, the transmission connecting rod 2 7 and the transmission connecting rod 3 8 are eccentrically arranged relative to the axis center line of the transmission main shaft 1, so that the transmission connecting rod 1 6, the transmission connecting rod 2 7 are eccentrically arranged relative to the axis center line of the transmission main shaft 1, so that the transmission connecting rod 1 And the transmission connecting rod three 8 can swing with the rotation of the transmission main shaft 1, the other end of the transmission connecting rod one 6 and the tooth rack connecting rod one 2 are hinged to the crank one 51, the other end of the transmission connecting rod two 7 and the tooth rack connecting rod two 3 are hinged to the crank two 52, and the other end of the transmission connecting rod three 8 and the bending needle shaft connecting rod 4 are hinged to the crank three 53, so that the transmission connecting rod one 6 and the crank one 51 cooperate to drive the tooth rack connecting rod one 2 to drive one of the tooth racks to move, the transmission connecting rod two 7 and the crank two 52 cooperate to drive the tooth rack connecting rod two 3 to drive the other tooth rack to move, and the transmission connecting rod three 8 and the crank three 53 cooperate with the bending needle shaft connecting rod 4 to drive the bending needle to move.

[0024] Combination Figure 4 A limiting sleeve 1 54, a limiting sleeve 2 55 and a limiting sleeve 3 56 are installed axially on the output shaft 5 by screws or locating pins, wherein the limiting sleeve 1 54 and the limiting sleeve 3 56 are located at both ends of the output shaft 5, and the limiting sleeve 2 55 is arranged near the middle of the output shaft 5. The crank 1 51 and the crank 2 52 are sleeved on the output shaft 5 and are close together, and the crank 1 51 and the crank 2 52 are limited between the limiting sleeve 1 54 and the limiting sleeve 2 55. A U-shaped limiting plate 57 is also installed on the output shaft 5 by screws or locating pins, and the limiting plate 57 is close to the limiting sleeve 3 56. The crank 3 53 is sleeved on the output shaft 5 and is limited between the limiting sleeve 2 55 and the limiting plate 57.

[0025] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0026] Although this article uses more terms such as transmission main shaft 1, tooth frame connecting rod 1 2, tooth frame connecting rod 2 3, bending needle shaft connecting rod 4, output shaft 5, crank 1 51, crank 2 52, crank 3 53, limiting sleeve 1 54, limiting sleeve 2 55, limiting sleeve 3 56, limiting plate 57, transmission connecting rod 1 6, transmission connecting rod 2 7, transmission connecting rod 3 8, etc., it does not exclude the possibility of using other terms. The use of these terms is only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A transmission structure of a stitching machine, comprising a transmission main shaft (1) connected to a motor, a tooth frame connecting rod 1 (2) for driving a tooth frame, a tooth frame connecting rod 2 (3) and a bending needle shaft connecting rod (4) for driving a bending needle, and the stitching machine also comprises an output shaft (5) arranged parallel to and below the transmission main shaft (1), characterized in that: The transmission structure comprises a transmission connecting rod 1 (6), a transmission connecting rod 2 (7) and a transmission connecting rod 3 (8); the output shaft (5) is rotatably connected with a crank 1 (51) hinged to the tooth frame connecting rod 1 (2), a crank 2 (52) hinged to the tooth frame connecting rod 2 (3) and a crank 3 (53) hinged to the bending needle shaft connecting rod (4); one end of the transmission connecting rod 1 (6), the transmission connecting rod 2 (7) and the transmission connecting rod 3 (8) are all fixed on the transmission main shaft (1); the other end of the transmission connecting rod 1 (6) is hinged to the crank 1 (51), the other end of the transmission connecting rod 2 (7) is hinged to the crank 2 (52), and the other end of the transmission connecting rod 3 (8) is hinged to the crank 3 (53).

2. The transmission structure of the stitching machine according to claim 1, characterized in that: The crank one (51), the crank two (52) and the crank three (53) are axially constrained on the output shaft (5).

3. The transmission structure of the stitching machine according to claim 2 is characterized in that: The output shaft (5) is detachably connected to a limiting sleeve 1 (54) and a limiting sleeve 2 (55) along the length direction; the limiting sleeve 1 (54) is located at one end of the output shaft (5); the limiting sleeve 2 (55) is arranged close to the middle of the output shaft (5); the crank 1 (51) and the crank 2 (52) are closely attached to each other, and the crank 1 (51) and the crank 2 (52) are limited between the limiting sleeve 1 (54) and the limiting sleeve 2 (55).

4. The transmission structure of the stitching machine according to claim 3 is characterized in that: The output shaft (5) is also detachably connected to a limiting shaft sleeve (3) (56) located at the other end of the output shaft (5), and the output shaft (5) is also detachably connected to a limiting plate (57) in a U shape and in close contact with the limiting shaft sleeve (3) (56), and the crank (3) (53) is limited between the limiting shaft sleeve (2) (55) and the limiting plate (57).

5. The transmission structure of the stitching machine according to any one of claims 1 to 4, characterized in that: One end of the transmission connecting rod 1 (6), the transmission connecting rod 2 (7) and the transmission connecting rod 3 (8) located on the transmission main shaft (1) is eccentrically arranged relative to the axis of the transmission main shaft (1).

6. The transmission structure of the stitching machine according to claim 5, characterized in that: The transmission main shaft (1) is rotatably connected to the casing via a bearing (9).

Images