Presser foot lifting and thread loosening and clamping mechanism of roller car

Abstract

According to the presser foot lifting and thread loosening and clamping mechanism of the roller car, a driver is provided with a driving shaft, a presser foot lifting cam is fixed to the driving shaft, a circular transmission piece, a rotating shaft and a pushing rod are arranged on a presser foot lifting crank, the presser foot lifting cam rotates to act on the circular transmission piece, and the whole presser foot lifting crank is pushed to rotate with the rotating shaft as a rotating shaft; the push rod and the presser foot lifting slide block are lifted together with the presser foot lifting rod and the presser foot, so that the presser foot lifting action of the roller car is realized; the driver is provided with a driving shaft, the driving shaft is fixedly provided with a wire loosening and clamping end face driving wheel, the wire loosening and clamping end face driving wheel is provided with a first inclined plane, a second inclined plane, an upper plane and a lower plane, the upper plane and the lower plane are located between the first inclined plane and the second inclined plane, the upper plane is higher than the lower plane, and the first inclined plane and the second inclined plane are inclined planes. The thread loosening rod acts on the lower plane and is transferred to the upper plane through the first inclined plane, and the thread loosening device has the advantage of being low in mechanical noise.

Description

Technical Field

[0001] The present application relates to the technical field of sewing machine manufacturing, and specifically proposes a presser foot lifting and thread loosening mechanism for a roller sewing machine. Background Art

[0002] Roller sewing machine, also known as high-platform sewing machine, is a special type of sewing equipment. It adopts upper and lower rollers and needles to feed materials synchronously. The cloth feeding system is safe and reliable, which makes the sewing smooth and the stitches beautiful. It can realize the sewing function of various stitch lengths of the double needle series and is suitable for the production of leather sofas of various thicknesses.

[0003] CN102505362B discloses a roller cart presser foot lifting drive mechanism, which is arranged on the body of the roller cart and is characterized in that it includes a push rod, a driving member, an operating push column, a connecting rod and a foot rod movable shaft. The driving member is connected to the push rod and can drive the push rod to move linearly. The connecting rod is fixedly connected to the side of the operating push column. The foot rod movable shaft is fixedly connected to the end of the operating push column and is axially fixed to the body. A spring that can reset the connecting rod is provided between the body and the operating push column. The foot rod movable shaft is connected to the presser foot rod through a transmission member. When the electromagnet is powered off (i.e., the push rod is retracted), the spring force keeps the connecting rod against the push rod, allowing the sewing machine to operate normally. When the electromagnet is powered on, the spring force still keeps the connecting rod against the push rod. However, during this process, the electromagnet push rod causes the connecting rod to rotate a certain angle relative to the manipulating push rod. The manipulating push rod causes the foot rod's movable shaft to rotate a corresponding angle, thereby lifting the presser foot assembly connected to the foot rod's movable shaft. The roller-type presser foot lifter's drive mechanism is an electromagnet, which produces a high level of mechanical noise, affecting the working environment.

[0004] In addition, CN110983664A discloses a patent for a neat seam starter, which adopts an integrated design of a motor, electronic control, and machine head, and uses an electromagnet as a driving element. It states: A clamping electromagnet assembly 43 is fixedly mounted on one end of the thread passing plate 42, and the clamping electromagnet assembly 43 includes a clamping electromagnet 43b and a clamping plate 43a. The clamping electromagnet 43b is fixedly connected to the thread passing plate 42, and the clamping plate 43a is fixedly connected to the iron core of the clamping electromagnet 43b. The upper thread is wound between the clamping electromagnet 43b and the clamping plate 43a of the clamping electromagnet assembly 43; the clamping electromagnet 43b and the clamping plate 43a of the upper thread are fixedly connected, and the clamping electromagnet 43b and the clamping plate 43a are fixedly connected, and the clamping electromagnet is attracted to achieve the clamping. Obviously, using an electromagnet as a power source when clamping or loosening the thread produces a lot of noise and is relatively expensive.

[0005] In summary, the power for lifting the presser foot and loosening the thread of the above-mentioned roller machine all adopts electromagnets, which causes certain damage to the quiet and comfortable working environment. Utility Model Content

[0006] The present application is aimed at the problem of high mechanical noise in the above-mentioned roller cart, and proposes a presser foot lifting mechanism for the roller cart, which is characterized by having a driver, a presser foot lifting cam, a presser foot lifting crank, a presser foot lifting slider, a presser foot lifting slot, a presser foot lifting rod and a presser foot, the driver having a driving shaft, a presser foot lifting cam being fixed on the driving shaft, a circular transmission part, a rotating shaft and a pushing rod being provided on the presser foot lifting crank, the rotation of the presser foot lifting cam acts on the circular transmission part, pushing the entire presser foot lifting crank to rotate with the rotating shaft as the rotating shaft, so that the pushing rod lifts the presser foot lifting slider together with the presser foot lifting rod and the presser foot, thereby realizing the presser foot lifting action of the roller cart, which can effectively solve the problem of high noise.

[0007] The circular transmission member is fixed on a presser foot lifting crank close to one side of the presser foot lifting cam.

[0008] The rotating shaft is rotatably arranged on the internal body of the machine head, the presser foot lifting crank rotates with the rotating shaft as the rotating shaft, and the push rod is fixed on the presser foot lifting crank close to the side of the presser foot lifting slider.

[0009] One end of the presser foot lifting slider is arranged inside the presser foot lifting chute, the other end of the presser foot lifting slider is fixed on the presser foot lifting rod, and the presser foot lifting chute is fixed on the internal body of the machine head.

[0010] The driver is fixed on the body of the roller carriage at the rear side of the head, and the driver is a stepping motor.

[0011] A wire loosening and clamping mechanism for a roller cart comprises a driver, a driving shaft, a wire loosening and clamping end face driving wheel, a wire loosening rod, a wire clamp and a vertical plate, wherein the driver comprises a driving shaft, a wire loosening and clamping end face driving wheel is fixed to the driving shaft, the wire loosening and clamping end face driving wheel comprises a first inclined plane, a second inclined plane, an upper plane and a lower plane, the upper plane and the lower plane are located between the first inclined plane and the second inclined plane, the upper plane is higher than the lower plane, and the shapes of the first inclined plane and the second inclined plane are both inclined planes, when the wire loosening and clamping end face driving wheel rotates, the wire loosening rod transfers from acting on the lower plane to the upper plane via the first inclined plane, or the wire loosening rod transfers from acting on the lower plane to the upper plane via the second inclined plane, and the wire loosening rod moves toward the wire clamp to loosen the wire of the wire clamp, which can also effectively solve the problem of high noise.

[0012] The slopes of the first and second inclined surfaces are the same.

[0013] The other end of the thread-releasing rod is connected to the thread clamp arranged on the head of the roller machine, and the thread-releasing rod passes through a through hole on a vertical plate provided inside the head.

[0014] The advantage of the present application is that the presser foot lifting action of the presser foot lifting mechanism and the thread loosening action of the thread loosening mechanism can be realized by using one driver, and it has the advantage of low mechanical noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the position of the presser foot lifter on a roller carriage of the present application;

[0016] Figure 2 This is a structural schematic diagram of a presser foot lifter for a roller cart of the present application;

[0017] Figure 3 This is a structural diagram of a wire loosening and clamping mechanism of a roller cart of the present application;

[0018] Figure 4 This is a schematic structural diagram of a loosening and clamping end face drive wheel, a loosening rod and a clamping device of a loosening and clamping mechanism of a roller car in the present application;

[0019] Figure 5 This is a structural diagram of a wire-releasing and clamping end face driving wheel of a wire-releasing and clamping mechanism of a roller vehicle of the present application.

[0020] The numbers referring to the names of the parts in the above drawings are as follows:

[0021] Driver 10, drive shaft 101, presser foot lifting cam 11, presser foot lifting crank 12, circular transmission part 121, rotating shaft 122, push rod 123, presser foot lifting slider 13, presser foot lifting chute 14, presser foot lifting rod 15, presser foot 16; thread loosening and clamping end face driving wheel 21, inclined surface 1 211, inclined surface 212, upper plane 213, lower plane 214, thread loosening rod 22, thread clamp 23, machine head 30, vertical plate 301. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-5 The preferred embodiments of the present application are described in detail so that the advantages and features of the present application can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present application. These embodiments are only used to illustrate the present invention and are not intended to limit the present invention.

[0023] The present application discloses a presser foot lifting and thread loosening mechanism for a roller machine, which is installed on the head of the roller machine. A driver 10 is provided and used to realize the presser foot lifting action of the presser foot lifting mechanism and the thread loosening action of the thread loosening mechanism, and the invention has the advantages of delicate and simple structure and low manufacturing cost.

[0024] Example 1

[0025] The presser foot lifting mechanism of a roller cart of the present application comprises a driver 10, a drive shaft 101, a presser foot lifting cam 11, a presser foot lifting crank 12, a presser foot lifting slider 13, a presser foot lifting slot 14, a presser foot lifting rod 15, a presser foot 16 and other components.

[0026] In this presser foot lifting mechanism, the aforementioned driver 10 is fixed to the body of the lathe head 30 at the rear side. The driver 10 has a drive shaft 101, to which a presser foot lifting cam 11 is fixed. The presser foot lifting crank 12 is provided with a circular transmission member 121, a rotating shaft 122, and a push rod 123. The circular transmission member 121 is fixed to the presser foot lifting crank 12 near the presser foot lifting cam 11. The rotating shaft 122 is rotatably arranged on the internal body of the lathe head 30. The presser foot lifting crank 12 rotates about the rotating shaft 122 as the rotating axis. The push rod 123 is fixed to the presser foot lifting crank 12 near the presser foot lifting slider 13.

[0027] Under the drive of the drive shaft 101, the presser foot lifting cam 11 rotates and acts on the circular transmission member 121, so that the circular transmission member 121 pushes the entire presser foot lifting crank 12 to rotate a certain angle with the rotating shaft 122 as the rotating axis, and also causes the push rod 123 to lift the presser foot lifting slider 13, and then lift together with the presser foot lifting rod 15 and the presser foot 16, to realize the presser foot lifting action of the roller car. One end of the presser foot lifting slider 13 is arranged inside the presser foot lifting chute 14, and the other end of the presser foot lifting slider 13 is fixed on the presser foot lifting rod 15. The lower end of the presser foot lifting rod 15 is connected to the presser foot 16, and the presser foot lifting chute 14 is fixed on the internal body of the machine head 30. The drive shaft 101 realizes the presser foot lifting action of the roller car through the linkage of the presser foot lifting crank 12, the presser foot lifting slider 13, the presser foot lifting chute 14, the presser foot lifting rod 15 and the presser foot 16.

[0028] In addition, since the presser foot lifting cam 11 rotates and acts on the circular transmission member 121 in a gradual pushing process, the presser foot lifting mechanism has the advantage of low mechanical noise during operation.

[0029] The driver 10 of the present application preferably uses a stepper motor.

[0030] Example 2

[0031] The present application discloses a wire loosening and clamping mechanism for a roller cart, comprising a driver 10, a drive shaft 101, a wire loosening and clamping end face driving wheel 21, a wire loosening rod 22, a wire clamp 23, a vertical plate 301 and other components.

[0032] The driver 10 includes a drive shaft 101, to which a tensioning end surface drive wheel 21 is fixed. The tensioning end surface drive wheel 21 includes a first inclined surface 211, a second inclined surface 212, an upper plane 213, and a lower plane 214. The upper plane 213 and the lower plane 214 are located between the first inclined surface 211 and the second inclined surface 212, with the upper plane 213 being higher than the lower plane 214. The first inclined surface 211 and the second inclined surface 212 are both inclined surfaces, and the slopes of the first inclined surface 211 and the second inclined surface 212 are the same. A tensioning lever 22 is configured to act on the first inclined surface 211, the second inclined surface 212, the upper plane 213, and the lower plane 214, with a total of four action surfaces. When the tensioning end surface drive wheel 21 rotates, the tensioning lever 22 can alternately act on the first inclined surface 211, the second inclined surface 212, the upper plane 213, or the lower plane 214.

[0033] The other end of the thread loosening rod 22 is connected to the thread clamp 23 provided on the head 30 of the roller car. The thread loosening rod 22 passes through the through hole on the vertical plate 301 inside the head 30, and the thread loosening rod 22 can be pushed in the above-mentioned through hole.

[0034] When the line needs to be loosened in the clamping state, the clamping end face driving wheel 21 rotates, and the loosening rod 22 is transferred from acting on the lower plane 214 to the upper plane 213 through the inclined plane 1 211, or the loosening rod 22 is transferred from acting on the lower plane 214 to the upper plane 213 through the inclined plane 212. During this process, the loosening rod 22 can be pushed to move toward the clamp 23 to loosen the line of the clamp 23.

[0035] When the line is to be clamped after the line is loosened, the line-loosening and clamping end face driving wheel 21 rotates, and the line-loosening rod 22 is transferred from acting on the upper plane 213 to the lower plane 214 (regardless of whether it passes through the inclined plane 1 211 or the inclined plane 212 clockwise or counterclockwise), and the line-loosening rod 22 returns to the line clamp 23 to complete the line clamping action. The line clamp 23 has a spring inside, and the line-loosening and clamping end face driving wheel 21 is acted upon by the spring. The line-loosening rod 22 returns to the line clamp 23 to complete the line clamping action.

[0036] In short, when the driver 10 is driven, the inclined surface 1 211 or the inclined surface 212 begins to contact the loosening rod 22, and then the loosening rod 22 moves backward, causing the loosening rod 22 to move backward or retreat, so that the clamp 23 is loosened to achieve the loosening or clamping action. Here, the loosening rod 22 passes back and forth through the entire inclined surface 1 211 or the inclined surface 212, so that the loosening rod 22 can achieve the purpose of loosening or clamping the wire.

[0037] The driver 10 of the present application is preferably a stepper motor.

[0038] The above is only one of the preferred implementation methods of the present application and is not intended to limit the present invention. It does not limit the scope of patent implementation of the present application. Any equivalent structure or equivalent process transformation made by using the shape, structure, and principle of the description and drawings of the present application, or directly or indirectly applied in other related technical fields; any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention are included in the scope of patent protection of the present application.

Claims

1. A presser foot lifting mechanism for a roller carriage, characterized in that: The invention comprises a driver (10), a presser foot lifting cam (11), a presser foot lifting crank (12), a presser foot lifting slider (13), a presser foot lifting chute (14), a presser foot lifting rod (15) and a presser foot (16); the driver (10) comprises a driving shaft (101); the presser foot lifting cam (11) is fixed on the driving shaft (101); the presser foot lifting crank (12) is provided with a circular transmission member (121), a rotating shaft (122) and a pushing rod (123); the presser foot lifting cam (11) rotates to act on the circular transmission member (121), pushing the entire presser foot lifting crank (12) to rotate with the rotating shaft (122) as the rotating shaft, so that the pushing rod (123) lifts the presser foot lifting slider (13), and lifts the presser foot lifting rod (15) and the presser foot (16) together, thereby realizing the presser foot lifting action of the roller carriage.

2. The presser foot lifting mechanism of a roller cart according to claim 1, characterized in that: The circular transmission member (121) is fixed on the presser foot lifting crank (12) close to one side of the presser foot lifting cam (11).

3. The presser foot lifting mechanism of a roller cart according to claim 1, characterized in that: The rotating shaft (122) is rotatably arranged on the internal body of the machine head (30); the presser foot lifting crank (12) rotates around the rotating shaft (122); and the push rod (123) is fixed on the presser foot lifting crank (12) near the side of the presser foot lifting slider (13).

4. The presser foot lifting mechanism of a roller cart according to claim 1, characterized in that: One end of the presser foot lifting slider (13) is arranged inside the presser foot lifting chute (14), the other end of the presser foot lifting slider (13) is fixed on the presser foot lifting rod (15), and the presser foot lifting chute (14) is fixed on the internal body of the machine head (30).

5. The presser foot lifting mechanism of a roller cart according to claim 1, characterized in that: The driver (10) is fixed on the body of the roller carriage head (30) at the rear side, and the driver (10) is a stepping motor.

6. A line loosening and clamping mechanism for a roller cart, comprising a driver (10), a drive shaft (101), a line loosening and clamping end face driving wheel (21), a line loosening rod (22) and a line clamp (23), wherein the driver (10) comprises a drive shaft (101), a line loosening and clamping end face driving wheel (21) is fixed on the drive shaft (101), the line loosening and clamping end face driving wheel (21) comprises an inclined plane 1 (211), an inclined plane 2 (212), an upper plane (213) and a lower plane (214), wherein the upper plane (213) and the lower plane (214) are located between the inclined plane 1 (211) and the inclined plane 2 (212). Between the second inclined plane (212), the upper plane (213) is higher than the lower plane (214), and the shapes of the first inclined plane (211) and the second inclined plane (212) are both inclined planes. When the driving wheel (21) for loosening the clamping end face rotates, the loosening rod (22) is transferred from acting on the lower plane (214) to the upper plane (213) through the first inclined plane (211), or the loosening rod (22) is transferred from acting on the lower plane (214) to the upper plane (213) through the second inclined plane (212), and the loosening rod (22) moves toward the clamping device (23) to loosen the clamping device (23).

7. A wire loosening and clamping mechanism for a roller car according to claim 6, characterized in that: The slopes of the first slope (211) and the second slope (212) are the same.

8. The thread releasing and clamping mechanism of a roller car according to claim 6, characterized in that: The other end of the thread-releasing rod (22) is connected to a thread clamp (23) provided on the head (30) of the roller carriage, and the thread-releasing rod (22) passes through a through hole on a vertical plate (301) provided inside the head (30).

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