Feeding mechanism and sewing machine

Abstract

The feeding mechanism comprises a feeding shaft, a first pin shaft, a connecting seat, a tooth frame and a tooth lifting assembly, the feeding shaft and the first pin shaft extend in the first direction, the tooth lifting assembly is used for driving the tooth frame to move up and down, and the feeding shaft can rotate around the axis of the feeding shaft; the connecting base comprises a base body and connecting parts which are fixedly arranged, the feeding shaft is fixedly connected with the base body, and the two connecting parts are arranged in the first direction in a spaced mode. The first pin shaft is rotationally connected between the two connecting parts around the axis of the first pin shaft; one end of the tooth frame is located between the two connecting parts, the tooth frame can be movably connected with the first pin shaft in the axial direction of the first pin shaft, and a locking mechanism is arranged between the first pin shaft and the tooth frame; when the feeding mechanism is in the working state, the locking mechanism is in the locking state, the tooth frame abuts against one of the connecting parts, and the feeding structure is stable and convenient to adjust.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewing machine technical field, concretely relates to a feeding mechanism and sewing machine. BACKGROUND

[0002] In prior art, the feeding mechanism of sewing machine includes a rack, a feeding shaft and a rack seat, the feeding shaft is fixedly connected with the rack seat, the rack seat is fixedly provided with a pin shaft, the rack is rotatably connected with the pin shaft, and a limiting structure is arranged between the rack seat and the rack to limit the relative displacement of the two along the connecting pin shaft, thereby maintaining the stability of the feeding mechanism. However, with the increase of use time, the gap between the rack and the rack seat will increase, and the limiting structure will gradually lose its effect, so that the rack will move relative to the rack seat along the connecting pin shaft when the feeding mechanism is working, which affects the stability of the feeding mechanism and even affects the service life of the feeding mechanism. Most feeding mechanisms can only be disassembled after the above problems occur, and the gap can be eliminated by adding a gasket between the rack and the rack seat, but this operation is very troublesome, and it is usually difficult to find a gasket with the appropriate thickness. SUMMARY

[0003] The utility model aims at providing a new feeding mechanism.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of a feeding mechanism, comprising:

[0005] The feeding shaft extends along the first direction, and the feeding shaft is rotatably arranged around its own axis;

[0006] The connecting seat includes a fixedly arranged seat body and a connecting part, the feeding shaft is fixedly connected with the seat body, and the connecting part includes two parts arranged along the first direction;

[0007] The first pin shaft extends along the first direction, and the first pin shaft is rotatably connected between the two connecting parts along its own axis;

[0008] The rack has a first driving end, the first driving end is located between the two connecting parts, the first driving end is axially movably connected with the first pin shaft, and a locking mechanism is arranged between the first pin shaft and the first driving end to lock them;

[0009] The rack lifting assembly is used to drive the rack to move up and down;

[0010] When the feeding mechanism is in working state, the locking mechanism is in the locked state, and the first driving end abuts against one of the connecting parts.

[0011] In some embodiments, the two connecting portions are a first connecting portion and a second connecting portion, the first driving end portion and the first connecting portion abut each other, one end of the first pin shaft is provided with a first snap spring, and the first connecting portion is located between the first driving end portion and the first snap spring along the first direction.

[0012] In some embodiments, the first driving end portion is provided with a through hole extending along the first direction, the first pin shaft is movably arranged in the through hole, the first driving end portion is provided with a lock hole communicating with the through hole, a hole wall of the lock hole is provided with an internal thread, the locking mechanism includes a locking bolt, when the locking mechanism is in a locked state, the locking bolt is inserted into the lock hole, the locking bolt is connected with the internal thread, and one end of the locking bolt extends into the through hole and abuts against the first pin shaft.

[0013] In some embodiments, the feeding shaft and the connecting seat are integrally injection molded.

[0014] In some embodiments, one end of the feeding shaft is provided with a plurality of fixing grooves, the fixing grooves are arranged at intervals on the outer side of the feeding shaft, and the grooves of the fixing grooves face outward, the seat body is provided with a connecting hole, the feeding shaft is inserted into the connecting hole, and the fixing grooves are located in the connecting hole.

[0015] In some embodiments, the tooth lifting assembly comprises:

[0016] A tooth lifting shaft extending along the first direction, and the tooth lifting shaft is rotatably arranged around its own axis;

[0017] A tooth lifting crank having a first side and a second side arranged on two sides, the first side is fixedly connected with the tooth lifting shaft;

[0018] A connecting rod having a first end and a second end arranged on two ends, the first end is rotatably connected with the second side around a first rotation center line, the second end is rotatably connected with the tooth rack around a second rotation center line, and the first rotation center line and the second rotation center line are parallel to each other and extend along the first direction.

[0019] In some embodiments, the tooth lifting assembly comprises two connecting rods, two first ends are located on two sides of the tooth lifting crank along the first direction, and two second ends are located on two sides of the tooth rack along the first direction.

[0020] In some embodiments, a second pin is fixed to the second side portion, the second pin extends along the first direction, and the two first ends are rotatably connected to the two ends of the second pin respectively; the tooth rack has a second driving end, the second driving end is fixed with a third pin, the third pin extends along the first direction, and the two second ends are rotatably connected to the two ends of the third pin respectively; a second retaining spring is clamped at each end of the second pin, and the connecting rod is located between the second retaining spring and the tooth lifting crank along the first direction; or, a second retaining spring is clamped at each end of the third pin, and the connecting rod is located between the second retaining spring and the second driving end along the first direction.

[0021] In some embodiments, the connecting base is made of plastic.

[0022] In some embodiments, the connecting portion is provided with a through hole penetrating along the first direction, the two through holes of the two connecting portions extend collinearly, and the first pin shaft is rotatably inserted into the two through holes.

[0023] Another object of the present invention is to provide a sewing machine.

[0024] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a sewing machine, including the above-mentioned feeding mechanism.

[0025] Due to the application of the above technical solution, the present invention has the following advantages over the prior art: the feed mechanism of the sewing machine of the present invention locks the first pin and the tooth frame together through a locking mechanism, and the first pin is rotatably connected to the connecting seat. When the feed mechanism is in operation, the first driving end of the tooth frame abuts against the connecting portion of the connecting seat to maintain the stability of the feed mechanism. When a gap is generated between the tooth frame and the connecting seat due to wear between the two, the locking mechanism only needs to be released, and the tooth frame can be driven to move axially along the first pin and abut against the connecting seat again. Thereafter, the locking mechanism only needs to be locked to eliminate the gap, which is simple and convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Attachment Figure 1 This is a schematic diagram of a partial structure of an adjustment mechanism according to a specific embodiment of the present invention;

[0027] Attachment Figure 2 For attachment Figure 1 Schematic diagram of the decomposition;

[0028] Attachment Figure 3 For attachment Figure 1 The main view;

[0029] Attachment Figure 4 For the attachment Figure 3 Cross-sectional view along the AA axis;

[0030] attached Figure 5 attached Figure 1 side view after removing the feeding shaft;

[0031] Wherein: 1, feeding shaft; 11, fixed groove; 2, connecting seat; 21, seat body; 211, connecting hole; 22, connecting part; 221, through hole; 3, first pin shaft; 31, first circlip; 32, first gasket; 4, tooth frame; 41, first driving end; 411, through hole; 412, locking hole; 42, second driving end; 51, locking bolt; 61, tooth lifting crank; 62, connecting rod; 63, second pin shaft; 64, third pin shaft; 65, second circlip; 66, second gasket. DETAILED DESCRIPTION

[0032] The technical solutions of the present application will be described in detail below with reference to the drawings and specific embodiments, so that the advantages and features of the present application are more easily understood by those skilled in the art. Obviously, the embodiments described in the present application are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] A sewing machine comprises Figures 1 to 3 A feeding mechanism shown in the figure, the feeding mechanism comprises a feeding shaft 1, a connecting seat 2, a first pin shaft 3, a tooth frame 4 and a tooth lifting assembly, wherein the feeding shaft 1 extends along a first direction and is rotatably arranged around its own axis. The connecting seat 2 comprises a fixedly arranged seat body 21 and a connecting part 22, the feeding shaft 1 is fixedly connected with the seat body 21, and the connecting part 22 comprises two parts arranged along the first direction. The first pin shaft 3 extends along the first direction, and the first pin shaft 3 is rotatably connected between the two connecting parts 22. The tooth frame 4 has a first driving end 41, the first driving end 41 is located between the two connecting parts 22, and the first driving end 41 is axially movably connected with the first pin shaft 3, and a locking mechanism is arranged between the first pin shaft 3 and the first driving end 41 for locking the two. The tooth lifting assembly is used to drive the tooth frame 4 to move up and down.

[0034] When the feeding mechanism is in the working state, the tooth lifting assembly drives the tooth frame 4 to move up and down, and the feeding shaft 1 rotates back and forth to drive the tooth frame 4 to move forward and backward, so that the tooth frame 4 forms a compound motion of up and down and forward and backward, thereby driving the sewing material to move forward. In the embodiment, when the feeding mechanism is in the working state, the locking mechanism is in the locked state, the first driving end portion 41 abuts against one of the connecting portions 22, thereby avoiding the relative movement of the connecting seat 2 and the tooth frame 4 along the first direction, making the relative rotation between the connecting seat 2 and the tooth frame 4 more stable, thereby ensuring the stability of the feeding mechanism. Even if a gap is generated between the first driving end portion 41 and the connecting portion 22 due to wear and tear and the like as the use time increases, it is only necessary to unlock the locking mechanism and drive the tooth frame 4 and the connecting seat 2 to move relative to each other along the first direction so that the first driving end portion 41 and the connecting portion 22 abut against each other, thereby eliminating the gap, which is simple and convenient to operate.

[0035] In the embodiment, the connecting seat 2 is made of plastic material, which has low processing difficulty and low production cost. In the embodiment, the feeding shaft 1 and the connecting seat 2 are integrally injection molded, and the fixed connection between the feeding shaft 1 and the connecting seat 2 is more stable, thereby improving the stability of the feeding mechanism. In the embodiment, one end of the feeding shaft 1 is provided with a plurality of fixed grooves 11, which are arranged at intervals on the outer side of the feeding shaft 1, and the grooves of the fixed grooves 11 face outward. Figure 2 As shown in the figure, the seat body 21 is provided with a connecting hole 211, the feeding shaft 1 is inserted in the connecting hole 211, and the fixed grooves 11 are located in the connecting hole 211. In this way, during the injection molding of the connecting seat 2 together with the connecting seat 2, the injection molding material of the connecting seat 2 will fill into the fixed grooves 11, thereby forming a more close connection between the connecting seat 2 and the feeding shaft 1.

[0036] In the embodiment, the connecting portion 22 is provided with a through hole 221 penetrating in the first direction, and the two through holes 221 of the two connecting portions 22 are collinearly extended, and the first pin shaft 3 is rotatably inserted in the two through holes 221, thereby realizing the rotational connection between the first pin shaft 3 and the connecting seat 2. In the embodiment, one end of the first pin shaft 3 is provided with a first snap spring 31, and the first snap spring 31 is located on the side of the connecting portion 22 away from the first driving end portion 41 in the first direction, and the relative displacement between the first pin shaft 3 and the connecting seat 2 can be limited by the first snap spring 31. Specifically, as shown in the figure, Figure 5 The two connecting portions 22 are a first connecting portion 22a and a second connecting portion 22b, the first driving end portion 41 abuts against the first connecting portion 22a, and the first connecting portion 22a is located between the first driving end portion 41 and the first snap spring 31 in the first direction. In the embodiment, as shown in the figure, Figure 2As shown, the first spring 31 and the connecting portion 22 are further provided with a first gasket 32, the first gasket 32 and the connecting portion 22 abut each other, and the first spring 31 and the first gasket 32 abut each other. Through the cooperation between the first connecting portion 22a and the first gasket 32, the relative displacement between the connecting seat 2 and the frame 4 is limited, and the relative displacement between the first pin shaft 3 and the connecting seat 2 in the first direction is also limited, so that the connecting portion 22 and the first driving end portion 41 maintain the state of abutting each other, thereby better maintaining the stability of the feeding mechanism.

[0037] In the embodiment, referring to Figure 2 、 Figure 4 As shown, the first driving end portion 41 is provided with a through hole 411 extending in the first direction, and the first pin shaft 3 movably penetrates the through hole 411. The first driving end portion 41 is further provided with a locking hole 412 which is in communication with the through hole 411. Specifically, the extension direction of the locking hole 412 is perpendicular to the extension direction of the through hole 411. In the embodiment, the locking mechanism includes a locking bolt 51, and the hole wall of the locking hole 412 is provided with an internal thread. When the locking mechanism is in the locked state, the locking bolt 51 is inserted into the locking hole 412, the locking bolt 51 is connected with the internal thread, one end of the locking bolt 51 extends into the through hole 411 and abuts tightly with the first pin shaft 3. By rotating the locking bolt 51, the first pin shaft 3 and the frame 4 can be locked together, so that the locking mechanism is converted to the locked state. Rotating the locking bolt 51 in the opposite direction makes the end of the locking bolt 51 disengage from the first pin shaft 3, so that the locking between the first driving end portion 41 and the first pin shaft 3 can be released, thereby the relative position of the two in the first direction can be adjusted.

[0038] In the embodiment, the locking hole 412 includes two locking holes which are spaced apart in the first direction, and the locking mechanism includes two locking bolts 51 which are respectively inserted into the two locking holes 412 and abut tightly with the first pin shaft 3. By providing two locking holes 412 and two locking bolts 51, the stability of the fixed connection between the first pin shaft 3 and the first driving end portion 41 of the frame 4 can be improved.

[0039] In the embodiment, the tooth-lifting assembly comprises a tooth-lifting shaft (not shown in the figure), a tooth-lifting crank 61 and a connecting rod 62. The tooth-lifting shaft extends along the first direction and is rotatably arranged about its own axis. The tooth-lifting crank 61 has a first side and a second side arranged at two opposite sides, and the first side is fixedly connected with the tooth-lifting shaft. The connecting rod 62 has a first end and a second end arranged at two opposite ends, the first end is rotatably connected with the second side about a first rotation center line, and the second end is rotatably connected with the dental arch 4 about a second rotation center line. The first rotation center line and the second rotation center line are parallel to each other and extend along the first direction. When the feeding mechanism is in a working state, the tooth-lifting shaft reciprocally rotates and drives the tooth-lifting crank 61 to rotate, the tooth-lifting crank 61 drives the connecting rod 62 to swing, thereby driving the dental arch 4 to move up and down.

[0040] In the embodiment, the tooth-lifting assembly comprises two connecting rods 62, the two first ends are located at two opposite sides of the tooth-lifting crank 61 along the first direction, and the two second ends are located at two opposite sides of the dental arch 4 along the first direction. The arrangement of the two connecting rods 62 improves the stability of the tooth-lifting assembly, thereby improving the stability of the feeding mechanism.

[0041] In the embodiment, the second side of the tooth-lifting crank 61 is fixedly provided with a second pin shaft 63 extending along the first direction, the axis of the second pin shaft 63 is collinearly arranged with the first rotation center line, and the two first ends of the two connecting rods 62 are rotatably connected with two ends of the second pin shaft 63, respectively. In the embodiment, the dental arch 4 has a second driving end 42, the second driving end 42 is fixedly provided with a third pin shaft 64 extending along the first direction, the axis of the third pin shaft 64 is collinearly arranged with the second rotation center line, and the two second ends of the two connecting rods 62 are rotatably connected with two ends of the third pin shaft 64, respectively. Specifically, in the embodiment, the second pin shaft 63 is fixedly connected with the second side of the tooth-lifting crank 61 through interference fit, and the third pin shaft 64 is fixedly connected with the second driving end 42 through interference fit.

[0042] In some embodiments, one second snap spring 65 is arranged at each end of the second pin shaft 63 along the first direction, and the connecting rod 62 is located between the second snap spring 65 and the tooth-lifting crank 61. In the embodiment, one second snap spring 65 is arranged at each end of the third pin shaft 64 along the first direction, and the connecting rod 62 is located between the second snap spring 65 and the second driving end 42. The second snap spring 65 plays a limiting role on the connecting rod 62, thereby maintaining the stability of the tooth-lifting assembly. In the embodiment, a second gasket 66 is further arranged between the second snap spring 65 and the second driving end 42.

[0043] In summary, the feeding mechanism of the embodiment, the first pin shaft 3 and the dental frame 4 are locked together through the locking mechanism, the first pin shaft 3 is rotationally connected with the connecting seat 2, and when the feeding mechanism works, the stability of the feeding mechanism is maintained by driving the first driving end portion 41 of the dental frame 4 and the connecting portion 22 of the connecting seat 2 to abut against each other. When a gap is generated between the dental frame 4 and the connecting seat 2 due to mutual abrasion, the locking of the locking mechanism is only released, the dental frame 4 is driven to move axially along the first pin shaft 3 and abut against the connecting seat 2 again, and then the gap can be eliminated by locking the locking mechanism, so that the operation is simple and convenient.

[0044] The above embodiment is only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A feed mechanism characterized by: The utility model relates to a feeding mechanism of a tooth brushing machine, comprising: a feeding shaft extending along a first direction, rotatably arranged around its own axis; a connecting seat comprising a fixedly arranged seat body and connecting parts, the feeding shaft being fixedly connected with the seat body, the connecting parts comprising two parts arranged along the first direction; a first pin shaft extending along the first direction, rotatably connected between the two connecting parts; a tooth rack having a first driving end part located between the two connecting parts, the first driving end part being axially movably connected with the first pin shaft, a locking mechanism being arranged between the first pin shaft and the first driving end part for locking them together; a tooth lifting assembly for driving the tooth rack to move up and down; when the feeding mechanism is in operation, the locking mechanism is in a locked state, and the first driving end part abuts against one of the connecting parts.

2. The feed mechanism of claim 1, wherein: The two connecting parts are a first connecting part and a second connecting part, the first driving end part abutting against the first connecting part, one end of the first pin shaft being provided with a first snap spring, the first connecting part being located between the first driving end part and the first snap spring along the first direction.

3. The feed mechanism of claim 1, wherein: The first driving end part is provided with a through hole extending along the first direction, the first pin shaft movably penetrating the through hole; the first driving end part is provided with a lock hole communicating with the through hole, the hole wall of the lock hole being provided with an internal thread; the locking mechanism comprises a locking bolt, when the locking mechanism is in the locked state, the locking bolt is inserted into the lock hole, the locking bolt is connected with the internal thread, and one end of the locking bolt extends into the through hole and abuts against the first pin shaft.

4. The feed mechanism of claim 1, wherein: The feeding shaft and the connecting seat are integrally injection molded.

5. The feed mechanism of claim 4, wherein: One end of the feeding shaft is provided with a plurality of fixing grooves, the fixing grooves being arranged at the outer side of the feeding shaft in a spaced manner, and the grooves of the fixing grooves facing outward; the seat body is provided with a connecting hole, the feeding shaft being inserted into the connecting hole, and the fixing grooves being located in the connecting hole.

6. The feed mechanism of claim 1, wherein: The tooth lifting assembly comprises: a tooth lifting shaft extending along the first direction, rotatably arranged around its own axis; a tooth lifting crank having a first side part and a second side part arranged on two sides, the first side part being fixedly connected with the tooth lifting shaft; a connecting rod having a first end part and a second end part arranged on two ends, the first end part being rotatably connected with the second side part around a first rotation center line, the second end part being rotatably connected with the tooth rack around a second rotation center line, the first rotation center line and the second rotation center line being parallel to each other and extending along the first direction.

7. The feed mechanism of claim 6, wherein: The tooth lifting assembly comprises two connecting rods, the two first end parts being located on two sides of the tooth lifting crank along the first direction, and the two second end parts being located on two sides of the tooth rack along the first direction.

8. The feed mechanism of claim 7, wherein: The second side is fixed with a second pin shaft extending along the first direction, and two first end portions are respectively rotatably connected to two ends of the second pin shaft; the tooth frame has a second driving end portion fixed with a third pin shaft extending along the first direction, and two second end portions are respectively rotatably connected to two ends of the third pin shaft; Two ends of the second pin shaft are respectively provided with a second snap spring, and the connecting rod is located between the second snap spring and the tooth lifting crank along the first direction; or two ends of the third pin shaft are respectively provided with a second snap spring, and the connecting rod is located between the second snap spring and the second driving end portion along the first direction.

9. A feed mechanism according to any one of claims 1 to 8, wherein: The connecting seat is made of plastic material; and / or the connecting portion is provided with a through hole penetrating along the first direction, two through holes of two connecting portions extend in line, and the first pin shaft is rotatably inserted in the two through holes.

10. A sewing machine characterized by: The feeding mechanism comprises the tooth lifting device according to any one of claims 1 to 9.

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