Feeding tool sinking device of sewing machine

Abstract

The utility model relates to a feeding tool sinking device of a sewing machine, which comprises a feeding tool mechanism and a pulling mechanism, and the feeding tool mechanism comprises a cloth feeding table, cloth feeding teeth, a shaft rod and a rocker arm; the pulling mechanism comprises a pull rod, a connecting rod, a traction piece and a steel cable, the pull rod is pivoted with the base and connected with the presser foot mechanism, two ends of the connecting rod are respectively connected with the pull rod and the traction piece, and two ends of the steel cable are respectively connected with the traction piece and the rocker arm; when the presser foot is lifted upwards, the presser foot mechanism drives the pull rod and the connecting rod to move downwards, the traction piece is driven by the connecting rod to rotate, and the steel cable drives the rocker arm and the shaft rod to rotate together under the rotating action of the traction piece and enables the cloth feeding teeth to sink into the surface of the needle plate. Therefore, the cloth placing space can be increased for placing the sewing material.

Description

Technical Field

[0001] The present application relates to the technical field of a sewing machine, and in particular to a feeding tool sinking device of a sewing machine. Background Art

[0002] The existing sewing machines are equipped with a main feed table and a differential feed table. The main feed tooth is connected to the end of the main feed table, and the differential feed tooth is connected to the end of the differential feed tooth frame. The main feed tooth and the differential feed tooth together constitute a feed tooth group. The main feed table and the differential feed table are driven by the eccentric shaft on the main shaft through a slider. The two ends of the slider are tightened with a retaining ring. After the angle of the eccentric shaft is adjusted, it is fixed with screws, so that the angle between the main feed tooth and the differential feed tooth and the upper surface of the needle plate is constant.

[0003] Under normal use of the sewing machine, when the needle bar moves up to the maximum stroke and is at the highest position, the main feed teeth and the differential feed teeth are generally 0.8 to 1.5 mm higher than the upper surface of the needle plate. When the presser foot is raised to a certain height, the thickness of the sewing material that can be placed between the presser foot and the needle plate should theoretically be the distance between the lower surface of the presser foot and the upper surface of the needle plate. However, since the needle bar is at the highest point when the presser foot is raised, the main feed teeth and the differential feed teeth are 0.8 to 1.5 mm higher than the needle plate, the actual thickness of the sewing material that can be placed between the presser foot and the needle plate is reduced by 0.8 to 1.5 mm, which makes it difficult to feed the sewing material between the presser foot and the needle plate before sewing begins.

[0004] Therefore, how to overcome the problem of insufficient space for accommodating cloth between the presser foot plate and the needle plate is a technical issue that the applicant needs to solve. Utility Model Content

[0005] One purpose of the present application is to provide a feed tool sinking device for a sewing machine, which allows the feed teeth to sink into the surface of the needle plate while the presser foot mechanism is lifted, thereby forming a larger space for the placement of sewing materials.

[0006] In order to achieve the above-mentioned purpose, the present application provides a feeding tool sinking device of a sewing machine, the sewing machine has a machine base, a needle plate and a presser foot mechanism, the presser foot mechanism has a presser foot, the feeding tool sinking device includes a feeding tool mechanism and a pulling mechanism, the feeding tool mechanism includes a cloth feeding platform, a cloth feeding tooth, a shaft rod and a rocker arm, the cloth feeding tooth is connected to one end of the cloth feeding platform, and the two ends of the shaft rod are respectively connected to the rocker arm and the other end of the cloth feeding platform; the pulling mechanism is arranged on the machine base, the pulling mechanism includes a pull rod, a connecting rod, a pulling member and a steel cable, the pull rod is pivotally connected to the machine base and connected to the presser foot mechanism, the two ends of the connecting rod are respectively connected to the pull rod and the pulling member, and the two ends of the steel cable are respectively connected to the pulling member and the rocker arm; wherein when the presser foot is lifted upward, the pull rod and the connecting rod are driven downward by the presser foot mechanism, the pulling member will rotate under the drive of the connecting rod, and the steel cable will drive the rocker arm and the shaft rod to rotate together under the rotation of the pulling member, and at the same time, the cloth feeding tooth sinks into the surface of the needle plate.

[0007] In one embodiment, the pulling mechanism further includes a fixed plate, the presser foot mechanism further includes a linkage arm, the fixed plate is fixed to the machine base and configured corresponding to the linkage arm, and the pulling member and one end of the steel cable are mounted on the fixed plate.

[0008] In one embodiment, the pulling mechanism further includes a gear adjustment plate, which is fixed to the machine base and configured corresponding to the rocker arm.

[0009] In one embodiment, the pulling member is an L-shaped plate, which is pivotally connected to the fixed plate through bolts, one end of the pulling member is pivotally connected to the connecting rod through another bolt, and the other end of the pulling member is connected to the steel cable.

[0010] In one embodiment, the pulling mechanism also includes a tension spring, the pulling member is formed with a folding plate, the steel cable includes an outer sleeve, a core wire and a clamping member, one end of the outer sleeve is fixed to the fixed plate, the core wire is movably passed through the outer sleeve, and one end of the core wire is passed through the folding plate and the tension spring and fixed by the clamping member, and the tension spring is elastically clamped between the clamping member and the folding plate.

[0011] In one embodiment, the pulling mechanism also includes a gear adjustment plate, which is fixed to the machine base, and the steel cable also includes another clamping piece. The other end of the outer sleeve is fixed to the gear adjustment plate, and the other end of the core wire is connected to the rocker arm and fixed by another clamping piece.

[0012] In one embodiment, the delivery mechanism further includes a reset spring, the pulling mechanism further includes a plurality of studs, the reset spring has a first hook arm and a second hook arm, the reset spring is sleeved on the shaft, the first hook arm hooks the stud therein, and the second hook arm hooks the rocker arm.

[0013] In one embodiment, the pulling mechanism further includes a gear adjustment plate, which is fixed to the base and configured corresponding to the rocker arm, and the rocker arm is movably formed between the base and the gear adjustment plate.

[0014] In one embodiment, the gear adjustment plate is provided with a guide groove, and a gear adjustment screw is installed in the guide groove to stop the swing angle of the rocker arm.

[0015] In one embodiment, the feeding mechanism also includes a reset spring, the pulling mechanism also includes a plurality of studs, the gear adjustment plate is fixed to the machine base through the studs, the reset spring has a first hook arm and a second hook arm, the reset spring is sleeved on the shaft, the first hook arm hooks the stud therein, and the second hook arm hooks the rocker arm.

[0016] The present invention also has the following effects: it can easily feed the sewing material between the presser foot plate and the needle plate before sewing begins, which is especially convenient for some soft and thick fabrics. The overall structure is simple and easy to adjust, and can be realized without professional maintenance technicians. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an appearance diagram of a sewing machine in which a feeding tool sinking device is combined with the sewing machine of the present application.

[0018] Figure 2 This is an appearance diagram of the feeding tool sinking device of the sewing machine of the present application being combined with the machine base.

[0019] Figure 3 for Figure 2 Another perspective of .

[0020] Figure 4 This is a front view of the feeding tool sinking device assembly of the sewing machine of the present application.

[0021] Figure 5 The present invention is a side view of the feeding tool sinking device assembly of the sewing machine of the present application.

[0022] Figure 6 This is a front view of the combined use state of the feeding tool sinking device of the sewing machine of the present application.

[0023] Figure 7 This is a side view of the combined use state of the feeding tool sinking device of the sewing machine of the present application.

[0024] Description of reference numerals:

[0025] 1: Sending tool sinking device;

[0026] 10: Delivery mechanism;

[0027] 11: cloth feeding platform;

[0028] 111: Open your mouth;

[0029] 12: Feeding teeth;

[0030] 13: shaft;

[0031] 14: rocker arm;

[0032] 15: Slider;

[0033] 16: return spring;

[0034] 161: first hook arm;

[0035] 162: second hook arm;

[0036] 30: pulling mechanism;

[0037] 31: pull rod;

[0038] 32: connecting rod;

[0039] 33: Driving member;

[0040] 34: Steel cable;

[0041] 341: outer sleeve;

[0042] 342: core wire;

[0043] 343: clamping member;

[0044] 35: fixed plate;

[0045] 36: gear adjustment plate;

[0046] 361: guide groove;

[0047] 37: tension spring;

[0048] 38: stud;

[0049] 39: gear adjustment screw;

[0050] 8: Sewing machine;

[0051] 81: base;

[0052] 82: spindle;

[0053] 83: needle plate;

[0054] 831: tooth groove;

[0055] 84: transmission mechanism;

[0056] 85: presser foot mechanism;

[0057] 851: presser foot;

[0058] 8511: presser foot arm;

[0059] 8512: presser foot;

[0060] 852: Rotating arm;

[0061] 853: pressure adjustment member;

[0062] 854: Linked arm;

[0063] 855: Hook. DETAILED DESCRIPTION

[0064] The detailed description and technical contents of the present application are described as follows in conjunction with the accompanying drawings. However, the attached drawings are only provided for reference and explanation and are not intended to limit the present application.

[0065] See also Figures 1 to 5As shown, the present application provides a feeding tool sinking device for a sewing machine, which is installed on a sewing machine 8. The sewing machine 8 has a machine base 81, a main shaft 82, a needle plate 83, a transmission mechanism 84, a presser foot mechanism 85 and other related components or / and devices. The main shaft 82 passes through the machine base 81, the transmission mechanism 84 is connected to the main shaft 82 and is driven by it, the needle plate 83 is fixed on the sewing platform of the machine base 81, and a plurality of tooth grooves 831 are provided on the needle plate 83. The presser foot mechanism 85 mainly includes a presser foot 851, a rotating arm 852, a pressure adjustment member 853, a linkage arm 854 and Hook strip 855, presser foot 851 mainly includes presser foot arm 8511 and presser foot plate 8512, wherein the rotating arm 852 is rotatably connected to the machine base 81, the presser foot 851 and the linkage arm 854 are respectively connected to the two ends of the rotating arm 852, the pressure adjusting member 853 is connected to the end of the presser foot arm 8511 away from the rotating arm 852, the presser foot plate 8512 is connected to the presser foot arm 8511 and is located on the outside of the pressure adjusting member 853, and the presser foot plate 8512 is operably arranged above the needle plate 83. Since the structure of this part is the existing technology, it will not be described in detail one by one.

[0066] The tool conveying and lowering device 1 of the present application mainly includes a tool conveying mechanism 10 and a pulling mechanism 30 .

[0067] The feeding mechanism 10 mainly includes a feeding platform 11, a feeding tooth 12, a shaft 13, a rocker arm 14 and a slider 15. The feeding tooth 12 is connected to one end of the feeding platform 11, and the two ends of the shaft 13 are respectively connected to the rocker arm 14 and the other end of the feeding platform 11. The feeding platform 11 is provided with an opening 111 at one end away from the feeding tooth 12, and the shaft 13 is connected to the feeding platform 11 through the slider 15. The shaft 13 is an eccentric shaft, and the feeding tooth 12 can be made to protrude from the surface height of the needle plate 83 by rotating its eccentricity.

[0068] The pulling mechanism 30 is arranged on the machine base 81, and it mainly includes a pull rod 31, a connecting rod 32, a pulling piece 33 and a steel cable 34. One end of the pull rod 31 is pivotally connected to the aforementioned machine base 81, and is connected to the linkage arm 854 of the presser foot mechanism 85 through the aforementioned hook 855. The two ends of the connecting rod 32 are respectively connected to the pull rod 31 and the pulling piece 33, and the two ends of the steel cable 34 are respectively connected to the pulling piece 33 and one end of the rocker arm 14 away from the shaft 13.

[0069] In one embodiment, the pulling mechanism 30 also includes a fixed plate 35, which is fixed to the machine base 81 and corresponds to the linkage arm 854 of the presser foot mechanism 85, and provides a pulling member 33 and one end of the steel cable 34 for installation, wherein the pulling member 33 is an L-shaped plate, which is pivoted to the fixed plate 35 by bolts, one end of the pulling member 33 is pivoted to one end of the connecting rod 32 by bolts, and the other end of the pulling member 33 is connected to the steel cable 34, and a folding plate 331 is formed on the pulling member 33; the other end of the connecting rod 32 is pivoted to the end of the pull rod 31 away from the hook 855 by bolts.

[0070] In one embodiment, the pulling mechanism 30 further includes a gear adjustment plate 36, which is fixed to the base 81 and corresponds to the configuration of the rocker arm 14 of the feeding mechanism 10, and provides the other end of the steel cable 34 for installation. The rocker arm 14 is movably formed between the base 81 and the gear adjustment plate 36.

[0071] In one embodiment, the pulling mechanism 30 further includes a tension spring 37, and the steel cable 34 mainly includes an outer sleeve 341, a core wire 342 and two clamping members 343, wherein the two ends of the outer sleeve 341 are respectively fixed to the fixed plate 35 and the gear adjustment plate 36, the core wire 342 is movably passed through the outer sleeve 341, and one end of the core wire 342 passes through the folding plate 331 of the pulling member 33 and the tension spring 37, and is fixed by the clamping member 343, and the tension spring 37 is elastically clamped between the clamping member 343 and the folding plate 331 of the pulling member 33. The other end of the core wire 342 passes through the rocker arm 14 and is fixed by the clamping member 343.

[0072] In one embodiment, the feeding mechanism 10 further includes a return spring 16, and the pulling mechanism 30 further includes a plurality of studs 38. The gear adjustment plate 36 is fixed to the base 81 through the studs 38. The return spring 16 has a first hook arm 161 and a second hook arm 162. The return spring 16 is sleeved on the shaft 13. The first hook arm 161 hooks the stud 38 therein, and the second hook arm 162 hooks the rocker arm 14.

[0073] In one embodiment, the gear adjustment plate 36 is provided with a guide groove 361, and a gear adjustment screw 39 is installed in the guide groove 361 to stop the swing angle of the aforementioned rocker arm 14. This can be used in situations where the feed tooth 12 needs to be slightly adjusted.

[0074] See also Figure 6 and Figure 7 As shown, when the presser foot 851 is lifted upward during use, the connecting arm 854 rotates with the rotating arm 852, so that the hook 855 presses down the pull rod 31. At this time, the pull rod 31 rotates with its pivot point with the machine base 81 as the rotation center, and moves the connecting rod 32 downward. The pulling member 33 will rotate under the drive of the connecting rod 32. Under the rotation of the pulling member 33, the steel cable 34 will drive the rocking arm 14 and the shaft rod 13 to rotate together, and at the same time, the feed tooth 12 sinks into the surface of the aforementioned needle plate 83.

[0075] The above description is only a preferred embodiment of the present application and is not intended to limit the patent scope of the present application. Other equivalent changes that apply the patent spirit of the present application should all fall within the patent scope of the present application.

Claims

1. A feeding tool sinking device for a sewing machine, characterized in that: The sewing machine comprises a machine base, a needle plate and a presser foot mechanism, wherein the presser foot mechanism comprises a presser foot, and the feeding tool sinking device comprises: A feeding mechanism, comprising a cloth feeding platform, a cloth feeding tooth, a shaft rod and a rocker arm, wherein the cloth feeding tooth is connected to one end of the cloth feeding platform, and the two ends of the shaft rod are respectively connected to the rocker arm and the other end of the cloth feeding platform; and A pulling mechanism is arranged on the machine base, and the pulling mechanism comprises a pull rod, a connecting rod, a pulling piece and a steel cable. The pull rod is pivotally connected to the machine base and connected to the presser foot mechanism. Two ends of the connecting rod are respectively connected to the pull rod and the pulling piece, and two ends of the steel cable are respectively connected to the pulling piece and the rocker arm. When the presser foot is lifted upward, the pull rod and the connecting rod are driven downward by the presser foot mechanism, and the pulling member is driven by the connecting rod to rotate. Under the rotation of the pulling member, the steel cable drives the rocker arm and the shaft rod to rotate together, and at the same time allows the feed tooth to sink into the surface of the needle plate.

2. The feeding tool sinking device of a sewing machine according to claim 1, characterized in that: The pulling mechanism further comprises a fixing plate, and the presser foot mechanism further comprises a linkage arm. The fixing plate is fixed to the machine base and is arranged corresponding to the linkage arm, and the pulling member and one end of the steel cable are mounted on the fixing plate.

3. The feeding tool sinking device of a sewing machine as claimed in claim 2, characterized in that: The pulling mechanism further comprises a gear adjustment plate, which is fixed to the base and configured corresponding to the rocker arm.

4. The feeding tool sinking device of a sewing machine as claimed in claim 2, characterized in that: The pulling member is an L-shaped plate, which is pivotally connected to the fixing plate through bolts. One end of the pulling member is pivotally connected to the connecting rod through another bolt, and the other end of the pulling member is connected to the steel cable.

5. The feeding tool sinking device of a sewing machine as claimed in claim 4, characterized in that: The pulling mechanism also includes a tension spring, the pulling member is formed with a folding plate, the steel cable includes an outer sleeve, a core wire and a clamping member, one end of the outer sleeve is fixed to the fixed plate, the core wire is movably passed through the outer sleeve, and one end of the core wire is passed through the folding plate and the tension spring and fixed by the clamping member, and the tension spring is elastically clamped between the clamping member and the folding plate.

6. The feeding tool sinking device of a sewing machine as claimed in claim 5, characterized in that: The pulling mechanism also includes a gear adjustment plate, which is fixed to the machine base. The steel cable also includes another clamping piece. The other end of the outer sleeve is fixed to the gear adjustment plate. The other end of the core wire passes through the rocker arm and is fixed by the other clamping piece.

7. The feeding tool sinking device for a sewing machine as claimed in claim 6, characterized in that: The delivery mechanism further includes a reset spring, and the pulling mechanism further includes a plurality of studs. The reset spring has a first hook arm and a second hook arm. The reset spring is sleeved on the shaft rod. The first hook arm hooks the stud therein, and the second hook arm hooks the rocker arm.

8. The feeding tool sinking device for a sewing machine as claimed in claim 1, characterized in that: The pulling mechanism further comprises a gear adjustment plate, which is fixed to the base and configured corresponding to the rocker arm, and the rocker arm is movably formed between the base and the gear adjustment plate.

9. The feeding tool sinking device for a sewing machine as claimed in claim 8, characterized in that: The gear adjustment plate is provided with a guide groove, and a gear adjustment screw is installed in the guide groove to stop the swing angle of the rocker arm.

10. The feeding tool sinking device for a sewing machine according to claim 8, characterized in that: The feeding mechanism also includes a reset spring, and the pulling mechanism also includes a plurality of studs. The gear adjustment plate is fixed to the machine base through each of the studs. The reset spring has a first hook arm and a second hook arm. The reset spring is sleeved on the shaft rod. The first hook arm hooks the stud therein, and the second hook arm hooks the rocker arm.

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