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

Abstract

A presser foot lifting and thread loosening and clamping mechanism of a roller car is characterized in that a driver is provided with a driving shaft, a presser foot lifting cam is fixed on the driving shaft, a circular transmission part is arranged on a presser foot lifting crank, the circular transmission part is fixed on the presser foot lifting crank, the presser foot lifting cam rotationally acts on the circular transmission part, and a presser foot lifting sliding block is fixed on a presser foot lifting rod. The lower end of the presser foot lifting rod is connected with a presser foot; a thread loosening and clamping end face wheel is fixed to the driving shaft, a thread loosening rod is fixed to a thread loosening connecting rod and connected with a thread clamping device arranged on a roller machine head, and an acting rod is arranged on the thread loosening connecting rod. The thread loosening and clamping end face wheel rotates, the acting rod acts on the second plane and is transferred to the first plane through the first inclined face, and therefore the thread loosening rod moves in the direction of the thread clamping device to achieve the thread loosening action of the thread clamping device. The thread loosening and clamping end face wheel rotates, when the acting rod is transferred to the second plane from the first plane, the thread loosening rod returns to the thread clamping device to complete the thread clamping action, the presser foot lifting action and the thread loosening and clamping action can be achieved through one driver, and the problem that the manufacturing cost is high can be effectively solved.

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 is a special type of sewing equipment. It adopts upper and lower rollers and needles to feed the material 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] Currently, the presser foot lifting device of a roller-type sewing machine is usually a device driven by a cylinder to swing. The design principle of this device is not much different from the electromagnet-driven swinging device. However, since the production of roller-type sewing machines is not necessarily for customers of a certain scale, roller-type sewing machines using a cylinder-driven presser foot lifting device will inevitably require customers to have a compressor air supply device, which invisibly imposes a certain economic burden on customers. Publication No. CN1313419A provides a "reverse stitching device for an industrial sewing machine". When reverse stitching, it requires a switching device to activate a power transmission element preset in the sewing machine column, causing the lower and upper pull rods of the connecting rod to move and control the clutch device, ultimately driving the upper or lower feed shaft to drive the transmission shaft, and driving the upper or lower feed wheel to produce forward and reverse rotation, providing forward sewing feeding or reverse sewing feeding of the workpiece.

[0004] In addition, publication number CN110938944A discloses a patent for a roller machine with a presser foot thread cutting mechanism, including a machine head, a salad assembly, a needle bar, a thread clamping electromagnet, a thread clamping plate, a machine needle and a presser foot thread cutting mechanism. The presser foot thread cutting mechanism includes a thread cutting knife, a presser foot base plate, a thread cutting knife pressure plate, a presser foot connecting handle, a driving plate, a first guide rod, a cylinder body, a first fixed seat, a second guide rod, and a second locking nut. The present invention introduces compressed gas into the cylinder body through a quick-change joint, and then pushes the cylinder push rod, and then the cylinder push rod drives the driving plate, the presser foot connecting handle and the presser foot base plate to move as a whole. Then, when the upper thread passes through the presser foot base plate, the upper thread is cut off by the thread cutting knife at the upper surface port of the presser foot base plate. In this way, the sewn upper thread can be automatically cut off during sewing by the roller machine, and there is no need for manual secondary thread cutting. While reducing labor intensity, the quality of the product is improved, the work efficiency of the enterprise is improved, and the production cost is reduced.

[0005] In summary, in the above-mentioned roller carriage presser foot lifting device and presser foot cutting mechanism, the operation of the driving device or mechanism requires different drivers, which increases the manufacturing cost of the roller carriage. Moreover, the noise emitted by the components or cylinders during operation is also relatively large. Utility Model Content

[0006] The present application is aimed at the problem of high manufacturing cost of the above-mentioned roller cart, and proposes a presser foot lifting and thread loosening mechanism of a roller cart, characterized in that the presser foot lifting mechanism comprises a driver, a driving wheel, a presser foot lifting crank, a presser foot lifting slider, a presser foot lifting slide, a presser foot lifting rod and a presser foot, the driver comprises a driving shaft, a presser foot lifting cam is fixed on the driving shaft, a circular transmission part is provided on the presser foot lifting crank, the circular transmission part is fixed on the presser foot lifting crank, the presser foot lifting cam rotates and acts on the circular transmission part, the presser foot lifting slider is fixed on the presser foot lifting rod, and the lower end of the presser foot lifting rod is connected to the presser foot; the thread loosening mechanism comprises a driver, a driving wheel, a thread loosening rod, a thread clamp and a thread loosening connecting rod, the driving shaft is also fixed with a thread loosening end face wheel, and the thread loosening end face wheel has inclined surface one, inclined surface two, flat surface one and flat surface Surface two, the thread loosening rod is fixed on the thread loosening connecting rod, the thread loosening rod is connected to the thread clamping device arranged on the head of the roller machine, and the thread loosening connecting rod is provided with an action rod; when the thread is to be loosened in the clamping state, the thread loosening end face wheel rotates, and the action rod is transferred from acting on plane two through inclined plane one to plane one, or the action rod is transferred from acting on plane two through inclined plane two to plane one, so that the thread loosening rod moves toward the thread clamping device to realize the thread loosening action of the thread clamping device; when the thread is to be clamped after loosening, the thread loosening end face wheel rotates, and the action rod is transferred from acting on plane one to plane two, and the thread clamping device has a spring inside. Under the action of the spring, the thread loosening rod returns to the thread clamping device to complete the thread clamping action. By setting and using one driver, the presser foot lifting action of the presser foot lifting mechanism and the thread loosening action of the thread loosening mechanism can be realized, which can effectively solve the above problems.

[0007] Furthermore, a rotating shaft and a pushing rod are also provided on the presser foot lifter crank, the circular transmission part is fixed on the presser foot lifter crank close to the presser foot lifter cam side, the rotating shaft can be rotatably configured on the internal body of the machine head, and the pushing rod is fixed on the presser foot lifter crank close to the presser foot lifter slider side.

[0008] Furthermore, the circular transmission member is fixed on the presser foot lifting crank close to the presser foot lifting cam.

[0009] Furthermore, the presser foot lifting mechanism also has a presser foot lifting chute, 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 body inside the machine head.

[0010] Furthermore, the plane 1 and the plane 2 are located between the inclined plane 1 and the inclined plane 2, the plane 1 is higher than the plane 2, and the inclined plane 1 and the inclined plane 2 have the same slope.

[0011] Furthermore, the wire-loosening rod and the action rod are arranged in parallel or coaxially, and the wire-loosening rod passes through a through hole on a vertical plate provided inside the machine head.

[0012] Furthermore, a connector is provided between the presser foot lifting cam of the driving wheel and the thread loosening and clamping end face wheel.

[0013] Furthermore, the presser foot lifting cam is arranged and fixed on the driving shaft close to the driver side, and the thread loosening and clamping end face wheel is arranged and fixed on the driving shaft close to the thread loosening rod side.

[0014] Furthermore, the wire-loosening connecting rod is movably connected to the fixing bracket, and the fixing bracket is fixed on the machine head.

[0015] Furthermore, the driver is a stepping motor.

[0016] 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, which can effectively solve the problem of high manufacturing cost of the roller machine; the material has the advantage of low mechanical noise when executing the presser foot lifting action of the presser foot lifting mechanism and the thread loosening action of the thread loosening mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the positions of the presser foot lifting and thread loosening mechanism of a roller carriage of the present application;

[0018] Figure 2 This is a schematic diagram of the specific structure of the presser foot lifting and thread loosening mechanism of a roller car in the present application;

[0019] Figure 3 This is a structural diagram of the presser foot lifting and thread loosening mechanism of a roller cart of the present application;

[0020] Figure 4 This is a structural diagram of the driving wheel of the presser foot lifting and thread loosening mechanism of a roller cart of the present application;

[0021] The numbers referring to the names of the parts in the above drawings are as follows:

[0022] Driver 10, drive shaft 101, drive wheel 11, presser foot lifting cam 111, thread loosening and clamping end wheel 112, connector 113, inclined plane 1121, inclined plane 2 1122, plane 1 1123, plane 2 1124, 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 rod 21, thread clamp 22, thread loosening connecting rod 23, action rod 231, fixed bracket 232, machine head 30, vertical plate 301. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-4The 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.

[0024] The present application discloses a roller cart whose presser foot lifting and thread loosening mechanisms are both installed on the head 30 of the roller cart. 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, which has the advantages of sophisticated and simple structure and low manufacturing cost.

[0025] The presser foot lifting mechanism comprises a driver 10 , a driving wheel 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 , a presser foot 16 and other components.

[0026] In the presser foot lift mechanism, the driver 10 is fixed to the rear body of the lathe head 30. The driver 10 includes a drive shaft 101, to which is fixed a drive wheel 11. This drive wheel 11 has a presser foot lift cam 111. A presser foot lift 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 lift crank 12 near the presser foot lift cam 111. The rotating shaft 122 is rotatably mounted on the interior of the lathe head 30. The push rod 123 is fixed to the presser foot lift crank 12 near the presser foot lift slider 13.

[0027] When the driving wheel 11 is driven, the presser foot lifting cam 111 rotates and acts on the circular transmission member 121, causing the circular transmission member 121 to push the entire presser foot lifting crank 12 to rotate a certain angle with the rotating shaft 122 as the rotating axis, and also causing 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, thereby achieving the presser foot lifting action. 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 to 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 to the internal body of the machine head 30. When the driving wheel 11 is driven, the driving wheel 11 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] The above-mentioned thread loosening and clamping mechanism includes components such as a driver 10, a driving wheel 11, a thread loosening rod 21, a thread clamp 22, and a thread loosening connecting rod 23.

[0029] A driving wheel 11 is fixed on the driving shaft 101 of the driver 10, and a line loosening end wheel 112 is also fixed on the driving wheel 11. The line loosening end wheel 112 has a slope 1121, a slope 2 1122, a plane 1123 and a plane 2 1124. Plane 1 1123 and plane 2 1124 are located between slope 1121 and slope 2 1122. Plane 1 1123 is higher than plane 2 1124. Slope 1 1121 and slope 2 1122 are in the shape of slopes, and the slopes of slope 1 1121 and slope 2 1122 are the same. The wire loosening link 23 has an action rod 231, which is used to act on inclined surface 1121, inclined surface 2 1122, plane 1 1123 and plane 2 1124, which are four action surfaces. When the wire loosening end face wheel 112 rotates, the action rod 231 acts on inclined surface 1121, inclined surface 2 1122, plane 1 1123 and plane 2 1124 in rotation.

[0030] The thread release lever 21 is fixed to the thread release connecting rod 23. Similarly, an action rod 231 is also fixed to the thread release connecting rod 23. The thread release lever 21 and the action rod 231 are arranged parallel or coaxially. The thread release lever 21 is connected to the thread clamp 22 provided on the head 30 of the roller locomotive. The thread release lever 21 passes through a through hole on the vertical plate 301 provided inside the head 30, and the thread release lever 21 can pass through the through hole and be pushed within the through hole. The above-mentioned thread release connecting rod 23 is movably connected to a fixed bracket 232, which is fixed to the head 30.

[0031] When the line needs to be loosened in the clamping state, the clamping end wheel 112 rotates, and the action rod 231 is transferred from acting on plane 2 1124 to plane 1 1123 via inclined plane 1 1121, or the action rod 231 is transferred from acting on plane 2 1124 to plane 1 1123 via inclined plane 2 1122, thereby pushing the loosening rod 21 to move toward the clamp 22 to loosen the line of the clamp 22.

[0032] When the line is to be clamped after being loosened, the line loosening and clamping end wheel 112 rotates, and the action rod 231 is transferred from acting on plane 1 1123 to plane 2 1124 (regardless of whether it passes through inclined plane 1 1121 or inclined plane 2 1122 clockwise or counterclockwise), the line clamp 22 has a spring inside, and under the action of the spring, the line loosening rod 21 returns to the line clamp 22 to complete the line clamping action.

[0033] In summary, when the driver 10 is driven, the inclined surface 1121 or the inclined surface 2 1122 begins to contact the action rod 231, and then the action rod 231 moves backward, causing the wire loosening rod 21 to move backward or retreat, so that the wire clamp 22 is loosened to achieve the wire loosening action or the wire clamping action. Here, the action rod 231 passes back and forth through the entire inclined surface 1 1121 or the inclined surface 2 1122, so that the wire loosening rod 21 can achieve the purpose of loosening or clamping the wire.

[0034] A connector 113 is provided between the presser foot lifting cam 111 and the thread release end wheel 112 of the driving wheel 11. The presser foot lifting cam 111 and the thread release end wheel 112 are two independent bodies, each fixed to the driving shaft 101. The presser foot lifting cam 111 is provided on the driving shaft 101 near the driver 10, and the thread release end wheel 112 is provided on the driving shaft 101 near the thread release lever 21.

[0035] The driver 10 of the present application is preferably used with a stepper motor. In addition, the presser foot lifting action of the presser foot lifting mechanism and the thread loosening action of the thread loosening mechanism of the present application have the advantage of low mechanical noise during operation.

[0036] 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 and thread loosening mechanism for a roller car, characterized in that: The presser foot lifting mechanism comprises a driver (10), a driving wheel (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), a presser foot lifting cam (111) is fixed on the driving shaft (101), a circular transmission member (121) is provided on the presser foot lifting crank (12), the circular transmission member (121) is fixed on the presser foot lifting crank (12), the presser foot lifting cam (111) rotates and acts on the circular transmission member (121), the presser foot lifting slider (13) is fixed on the presser foot lifting rod (15), and the lower end of the presser foot lifting rod (15) is connected to the presser foot (16); The line loosening and clamping mechanism comprises a driver (10), a driving wheel (11), a line loosening rod (21), a line clamp (22) and a line loosening connecting rod (23); a line loosening and clamping end wheel (112) is fixed on the driving shaft (101); the line loosening and clamping end wheel (112) comprises a first inclined surface (1121), a second inclined surface (1122), a first plane (1123) and a second plane (1124); the line loosening rod (21) is fixed on the line loosening connecting rod (23); the line loosening rod (21) is connected to the line clamp (22) provided on the roller machine head (30); and the line loosening connecting rod (23) is provided with an action rod (231); when the line is to be loosened in the clamping state, the line loosening and clamping end wheel (112) rotates, and the action rod (231) is transferred from acting on plane 2 (1124) to plane 1 (1123) via inclined plane 1 (1121), or the action rod (231) is transferred from acting on plane 2 (1124) to plane 1 (1123) via inclined plane 2 (1122), so that the loosening rod (21) moves toward the clamp (22) to realize the loosening action of the clamp (22); when the line is to be clamped after the line is loosened, the loosening and clamping end face wheel (112) rotates, and when the action rod (231) is transferred from acting on plane 1 (1123) to plane 2 (1124), the clamp (22) has a spring inside, and under the action of the spring, the loosening rod (21) returns to the clamp (22) to complete the clamping action.

2. A presser foot lifting and thread loosening mechanism for a roller lathe according to claim 1, characterized in that: The presser foot lifting crank (12) is also provided with a rotating shaft (122) and a pushing rod (123); the circular transmission member (121) is fixed on the presser foot lifting crank (12) on the side close to the presser foot lifting cam (111); the rotating shaft (122) is rotatably arranged on the internal body of the machine head (30); and the pushing rod (123) is fixed on the presser foot lifting crank (12) on the side close to the presser foot lifting slider (13).

3. The presser foot lifting and thread loosening mechanism of a roller car 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 (111).

4. The presser foot lifting and thread loosening mechanism of a roller lathe according to claim 1, characterized in that: The presser foot lifting mechanism also has a presser foot lifting chute (14), 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 and thread loosening mechanism of a roller lathe according to claim 1, characterized in that: The plane one (1123) and the plane two (1124) are located between the inclined plane one (1121) and the inclined plane two (1122), the plane one (1123) is higher than the plane two (1124), and the inclined plane one (1121) and the inclined plane two (1122) have the same slope.

6. The presser foot lifting and thread loosening mechanism of a roller lathe according to claim 1, characterized in that: The wire loosening rod (21) and the action rod (231) are arranged in parallel or coaxially, and the wire loosening rod (21) passes through a through hole on a vertical plate (301) provided inside the machine head (30).

7. The presser foot lifting and thread loosening mechanism of a roller lathe according to claim 1, characterized in that: A connector (113) is provided between the presser foot lifting cam (111) of the driving wheel (11) and the thread loosening and clamping end face wheel (112).

8. The presser foot lifting and thread loosening mechanism of a roller lathe according to claim 1, characterized in that: The presser foot lifting cam (111) is arranged and fixed on the driving shaft (101) near the driver (10) side, and the thread loosening end face wheel (112) is arranged and fixed on the driving shaft (101) near the thread loosening rod (21) side.

9. The presser foot lifting and thread loosening mechanism of a roller lathe according to claim 1, characterized in that: The line-releasing connecting rod (23) is movably connected to a fixing bracket (232), and the fixing bracket (232) is fixed on the machine head (30).

10. The presser foot lifting and thread loosening mechanism of a roller lathe according to claim 1, characterized in that: The driver (10) is a stepping motor.

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