CN211645592U - Needle pitch adjusting mechanism and sewing machine - Google Patents
Needle pitch adjusting mechanism and sewing machine Download PDFInfo
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- CN211645592U CN211645592U CN201922323294.2U CN201922323294U CN211645592U CN 211645592 U CN211645592 U CN 211645592U CN 201922323294 U CN201922323294 U CN 201922323294U CN 211645592 U CN211645592 U CN 211645592U
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- movable nut
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Abstract
The utility model provides a needle pitch adjusting mechanism, which is arranged at the bottom of a bottom plate of a sewing machine, comprises a swinging plate seat connected with a feeding tooth, and also comprises a rotary driving device and a trapezoidal lead screw which are fixedly installed, wherein the output shaft of the rotary driving device is connected with the screw rod of the trapezoidal lead screw, and drives the screw rod to rotate; the movable nut of the trapezoidal screw rod is rotationally connected with the swing plate base through the connecting piece, and when the movable nut does linear motion, the movable nut drives the swing plate base to rotate. The utility model also provides a sewing machine, including aforementioned gauge needle adjustment mechanism. The utility model discloses an useful part lies in: 1. the rotary driving device drives and adjusts the needle pitch, and the encoder feeds back to realize high-precision adjustment; 2. the trapezoidal screw is utilized to realize self-locking at any position, and the rotary driving device can be powered off after adjustment is completed, so that the power consumption is reduced, and the service life of the motor is prolonged; 3. the power transmission process has no impact, low noise and small vibration.
Description
Technical Field
The utility model relates to a sewing machine technical field especially relates to a gauge needle adjustment mechanism and sewing machine.
Background
The stitch length adjusting function of the existing flat sewing machine is mainly realized through a manual mechanical mode, in the backstitch process, the manual mechanical mode can cause the impact between mechanical structures, generate larger working noise, influence the precision of the working stitch length after long-time working, and cannot be quickly and accurately adjusted to the required stitch length. In the process of sewing by the sewing machine, the sewing needle pitch cannot be adjusted at any time to adapt to various sewing conditions. In addition, the stitch length is manually adjusted through a backstitch wrench, or the backstitch electromagnet is adopted to drive and adjust the stitch length and the short thread end electromagnet is adopted to adjust the stitch length, the same stitch length adjusting function is realized by multiple driving structures, the related structure is complex, and the adjusting precision is low.
At present, another adjusting mode exists, namely the needle pitch adjustment is realized through a stepping motor, and compared with the traditional scheme, the method is more convenient and reliable and has high precision. However, after the needle pitch adjustment of the motor is realized, the motor still needs to be in a charged state, namely, the motor is always in the charged state in the working process of the sewing machine. On the one hand, the service life of the motor is directly influenced, and on the other hand, the power consumption and the heat productivity of the equipment are also increased.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned drawbacks, the present invention provides a needle pitch adjusting mechanism, which can cut off the power of the motor after adjusting the needle pitch, and has a self-locking function.
The utility model provides a needle pitch adjusting mechanism, which is arranged at the bottom of a bottom plate of a sewing machine, comprises a swinging plate seat connected with a feeding tooth, and also comprises a rotary driving device and a trapezoidal lead screw which are fixedly installed, wherein the output shaft of the rotary driving device is connected with the screw rod of the trapezoidal lead screw to drive the screw rod to rotate; the movable nut of the trapezoidal screw rod is rotatably connected with the swing plate base through a connecting piece, and when the movable nut moves linearly, the movable nut drives the swing plate base to rotate.
Preferably, an encoder is connected to the rotary driving device.
Preferably, the output shaft of the rotary drive is coaxially connected with the screw.
Preferably, the movable nut is fixedly provided with a fixing portion, the fixing portion is provided with a first pin shaft, the swing plate seat is provided with a second pin shaft, the connecting piece is provided with a first sliding groove in sliding fit with the first pin shaft and a second sliding groove in sliding fit with the second pin shaft, and the first sliding groove and the second sliding groove are obliquely arranged.
Preferably, the connecting piece is further provided with a third sliding groove extending in the vertical direction, and a guide sliding block fixedly installed is arranged in the third sliding groove.
Preferably, an included angle is formed between the output shaft of the rotary driving device and the axial direction of the screw, and the output shaft of the rotary driving device and the axial direction of the screw are in transmission connection.
Preferably, the movable nut is fixedly connected with one end of the connecting piece through the fixing part, the other end of the connecting piece is provided with a sliding groove, and the swinging plate seat is provided with a pin shaft in sliding fit with the sliding groove.
Preferably, the screw is fixedly mounted on the base plate through a fixing bracket.
Preferably, the screw rod fixing device further comprises a guide rod, one end of the guide rod is fixedly installed on the fixing support, the other end of the guide rod is movably arranged in the fixing portion in a penetrating mode, and the guide rod is parallel to the axial direction of the screw rod.
The utility model also provides a sewing machine, including aforementioned gauge needle adjustment mechanism.
The utility model discloses an useful part lies in:
1. the rotary driving device drives and adjusts the needle pitch, and the encoder feeds back to realize high-precision adjustment;
2. the trapezoidal screw is utilized to realize self-locking at any position, and the rotary driving device can be powered off after adjustment is completed, so that the power consumption is reduced, and the service life of the motor is prolonged;
3. the power transmission process has no impact, low noise and small vibration;
4. the functions of backstitch, closed stitch, pattern stitch and the like can be realized, the precision is higher, and the intelligent adjusting capability is stronger.
Drawings
FIG. 1 is a schematic structural view of a sewing machine according to a first embodiment of the present invention;
fig. 2 is a schematic structural view of a needle pitch adjusting mechanism according to a first embodiment of the present invention;
FIG. 3 is a schematic structural view of a sewing machine according to a second embodiment of the present invention;
fig. 4 is a schematic structural view of a gauge needle adjusting mechanism according to a second embodiment of the present invention;
element number description:
1 base plate
21 dental articulator base
22 dental articulator
3 feeding tooth
4 rotation driving device
41 output shaft
42 encoder
43 connecting sleeve
5 trapezoidal lead screw
51 Movable nut
52 screw
53 rotating sleeve
54 positioning ring
55 guide rod
6 swinging plate seat
61 second pin
62 pin shaft
7 fixed support
71 holding seat
72 guide plate
73 guide slider
74 fixed plate
8 fixed part
81 first pin
9 connecting piece
91 vertical section
911 first chute
912 third chute
92 horizontal segment
921 second chute
93 chute
11 first gear
12 second gear
Detailed Description
The following describes the present invention in further detail with reference to the accompanying drawings. These embodiments are provided only for illustrating the present invention and are not intended to limit the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the following description, referring to the drawings in fig. 1 as a reference basis of the direction, the direction of the dental articulator base 21 is the front direction, the direction of the swing plate base 6 is the rear direction, the side of the base plate 1 where the pitch adjustment mechanism is not installed is the upper direction, the side of the base plate 1 where the pitch adjustment mechanism is installed is the lower direction, the direction of the rotary driving device 4 is the right direction, and the direction of the feed dog 3 is the left direction.
As shown in fig. 1, the utility model provides a gauge needle adjustment mechanism, this mechanism set up in sewing machine's bottom plate 1, including fixed mounting's rotary drive device 4 and trapezoidal lead screw 5, rotary drive device 4's output shaft is connected with trapezoidal lead screw 5's screw rod, and drive screw rotates, drives trapezoidal lead screw 5's movable nut 51 and makes linear motion, and movable nut 51 rotates with swing plate seat 6 through connecting piece 9 simultaneously and is connected, and when movable nut 51 made linear motion, swing plate seat 6 rotated certain angle thereupon. Because the swing plate seat 6 is connected with the rear end of the feeding shaft 3, the front end of the feeding shaft 3 is fixedly connected with the tooth frame seat 21, and the tooth frame seat 21 is hinged with the tooth frame 22, the cloth feeding amount can be changed by changing the angle of the swing plate seat 6, and the purpose of adjusting the needle pitch is achieved. The utility model discloses a main theory of operation is, calculates the angle that swing plate seat 6 needs to be rotatory according to the demand to realize the rotation of arbitrary angle by rotary drive device 4, preferably rotary drive device 4 is step motor, and is connected with encoder 42, and the rotatory process of its output shaft has encoder 42 real time monitoring feedback, guarantees higher regulation precision. Meanwhile, the rotary driving device 4 and the swinging plate seat 6 are connected through the trapezoidal lead screw 5, self-locking at any position is realized by utilizing the self-locking property of the trapezoidal lead screw 5, after the needle pitch adjustment is completed, the rotary driving device 4 can be powered off, the whole needle pitch adjusting mechanism is self-locked, and the needle pitch cannot be changed.
The following are two specific embodiments of the present invention:
example one
As shown in fig. 1 and fig. 2, the bottom of the bottom plate 1 is provided with a rotary driving device 4, the rotary driving device 4 is provided with an encoder 42, and an output shaft 41 of the rotary driving device is coaxially and fixedly connected with a screw 52 of the trapezoidal lead screw 5 through a connecting sleeve 43. The bottom plate 1 is further provided with a fixing support 7, the bottom of the fixing support 7 is fixedly connected with a guide plate 72, and the guide plate 72 is further fixedly connected with a retaining seat 71. One end of the screw 52 is inserted into the holder 71, the other end is inserted with the movable nut 51, the fixed part 8 is fixedly mounted on the movable nut 51, and the fixed part 8 is in sliding fit with the guide plate 72 to prevent the movable nut 51 from rotating. In addition, a first pin 81 is further disposed on the left side of the fixing portion 8, and a second pin 61 is disposed on the swing plate base 6. The connector 9 includes a vertical section 91 and a horizontal section 92 connected in an L shape, in which the vertical section 91 extends in the up-down direction and the horizontal section 92 extends in the left-right direction. The bottom of vertical section 91 is equipped with first spout 911 with first round pin axle 81 sliding fit, the left side of horizontal segment 92 is equipped with the second spout 921 with second round pin axle 61 sliding fit, first spout 911 and second spout 921 are the slope setting, under the less condition of number of turns of rotation of output shaft 41 of rotary drive device 4, make the horizontal displacement of movable nut 51 fore-and-aft direction can drive connecting piece 9 and produce bigger vertical displacement, save installation space simultaneously, make the structure more compact. Further, a third sliding groove 912 extending in the up-down direction is further disposed at the top of the vertical section 91, and a guide slider 73 fixedly mounted on the fixing bracket 7 is disposed in the third sliding groove 912, so as to limit the moving direction of the connecting member 9.
The specific working principle of the first embodiment is as follows: the output shaft 41 of the rotary driving device 4 rotates to drive the screw rod 52 to rotate, the rotary motion of the screw rod 52 is converted into horizontal movement of the movable nut 51 in the front-back direction, the connecting piece 9 is driven to move up and down through sliding fit between the first pin shaft 81 and the first sliding groove 911 in the moving process of the movable nut 51, and the swinging plate seat 6 is stirred to swing through matching of the second pin shaft 61 and the second sliding groove 921, so that the needle pitch adjusting function is realized. After the adjustment is finished, the rotary driving device 4 can be powered off, and the position is kept by self-locking of the trapezoidal lead screw 5. In the adjusting process, the screw 52 is always in contact with the movable nut 51, the sliding groove and the pin shaft, and the action noise is low.
Example two
As shown in fig. 3 and 4, the bottom of the base plate 1 is provided with a rotation driving device 4, and the rotation driving device 4 is provided with an encoder 42. The output shaft 41 of the rotation driving device 4 is at an angle, specifically, at 90 degrees, with the axial direction of the screw 52, wherein the output shaft 41 is disposed in the front-back direction, and the screw 52 is disposed in the up-down direction. The bottom plate 1 is further provided with a fixing support 7, the bottom of the fixing support 7 is fixedly connected with a fixing plate 74, and the screw 52 is installed in the fixing support 7 and the fixing plate 74 through the rotating sleeve 53, so that the screw 52 is guaranteed not to shake in the rotating process. Preferably, the screw 52 is further sleeved with a positioning ring 54, one side of the positioning ring 54 is in contact with a rotating sleeve 53 embedded in the fixed bracket 7, and the positioning ring 54 and a shaft shoulder of the screw 52 can limit the up-and-down movement of the screw 52 during the working process. The end of the output shaft 41 of the rotation driving device 4 is fixedly connected with a first gear 11, a screw 52 is sleeved with a second gear 12, and the first gear 11 is in transmission connection with the second gear 12. A movable nut 51 penetrates through the screw 52 above the fixed support 7, the movable nut 51 is fixedly connected with one end of the connecting piece 9 through the fixed part 8, a sliding groove 93 is formed in the other end of the connecting piece 9, and a pin shaft 62 in sliding fit with the sliding groove 93 is arranged on the swing plate seat 6. The slide groove 93 provides a movement space in the left-right direction for the pin 62 during the swing. Further, still include a guide bar 55, the bottom end fixed mounting of guide bar 55 is on fixed bolster 7, and the top activity is worn to establish in fixed part 8, and guide bar 55 is on a parallel with the axial of screw rod 52, prevents that fixed part 8 from appearing rotating along with movable nut 52 in the in-process of up-and-down motion.
The specific working principle of the second embodiment is as follows: an output shaft 41 of the rotary driving device 4 rotates to drive the first gear 11 to rotate, and an encoder 42 is connected to the front end of the rotary driving device 4 to form closed-loop control and realize high-precision adjustment. The rotation of the first gear 11 rotates the second gear 12, and the rotation axis is changed to the vertical direction, thereby rotating the screw 52. The rotary motion of screw rod 52 turns into the linear motion of movable nut 51 upper and lower direction, and movable nut 51 and fixed part 8 fixed connection, guide bar 55 play the guide effect, and fixed part 8 drives connecting piece 9 up-and-down motion, and connecting piece 9 stirs the round pin axle 62 of fixing on swing plate seat 6 through spout 93, realizes the swing of swing plate seat 6 to realize the gauge needle regulatory function. After the adjustment is finished, the rotary driving device 4 can be powered off, and the position is kept by self-locking of the trapezoidal lead screw 5. The reversing movement is completed through the gear structure, so that the impact and vibration of the components during action are reduced, and the noise and vibration are small.
The utility model also provides a sewing machine, including aforementioned gauge needle adjustment mechanism.
To sum up, the utility model discloses an useful part lies in:
1. the rotary driving device drives and adjusts the needle pitch, and the encoder feeds back to realize high-precision adjustment;
2. the trapezoidal screw is utilized to realize self-locking at any position, and the rotary driving device can be powered off after adjustment is completed, so that the power consumption is reduced, and the service life of the motor is prolonged;
3. the power transmission process has no impact, low noise and small vibration;
4. the functions of backstitch, closed stitch, pattern stitch and the like can be realized, the precision is higher, and the intelligent adjusting capability is stronger.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (10)
1. A needle pitch adjusting mechanism is arranged at the bottom of a bottom plate (1) of a sewing machine, comprises a swinging plate seat (6) connected with a feeding tooth (3), and is characterized by further comprising a rotary driving device (4) and a trapezoidal screw rod (5) which are fixedly installed, wherein an output shaft (41) of the rotary driving device (4) is connected with a screw rod (52) of the trapezoidal screw rod (5) to drive the screw rod (52) to rotate; the movable nut (51) of the trapezoidal lead screw (5) is rotatably connected with the swing plate seat (6) through a connecting piece (9), and when the movable nut (51) moves linearly, the movable nut drives the swing plate seat (6) to rotate.
2. Needle pitch adjustment mechanism according to claim 1, wherein an encoder (42) is connected to the rotary drive (4).
3. Needle pitch adjustment mechanism according to claim 1, wherein the output shaft (41) of the rotary drive (4) is coaxially connected with a screw (52).
4. The needle pitch adjusting mechanism according to claim 3, wherein a fixing portion (8) is fixedly mounted on the movable nut (51), a first pin shaft (81) is arranged on the fixing portion (8), a second pin shaft (61) is arranged on the swing plate seat (6), a first sliding groove (911) in sliding fit with the first pin shaft (81) and a second sliding groove (921) in sliding fit with the second pin shaft (61) are arranged on the connecting member (9), and the first sliding groove (911) and the second sliding groove (921) are both obliquely arranged.
5. The needle pitch adjusting mechanism according to claim 4, wherein a third sliding groove (912) extending in the up-down direction is further arranged on the connecting piece (9), and a fixedly installed guide sliding block (73) is arranged in the third sliding groove (912).
6. The needle pitch adjustment mechanism of claim 1, wherein the output shaft (41) of the rotary drive device (4) is in transmission connection with the axial direction of the screw (52) with an included angle therebetween.
7. The needle pitch adjusting mechanism according to claim 6, wherein the movable nut (51) is fixedly connected with one end of the connecting piece (9) through the fixing part (8), the other end of the connecting piece (9) is provided with a sliding groove (93), and the swinging plate seat (6) is provided with a pin shaft (62) which is in sliding fit with the sliding groove (93).
8. Needle pitch adjustment mechanism according to claim 7, wherein said screw (52) is fixedly mounted on said base plate (1) by means of a fixing bracket (7).
9. The needle pitch adjusting mechanism according to claim 8, further comprising a guide rod (55), wherein one end of the guide rod (55) is fixedly mounted on the fixing bracket (7), and the other end is movably inserted into the fixing portion (8), and the guide rod (55) is parallel to the axial direction of the screw rod (52).
10. A sewing machine comprising a gauge adjustment mechanism as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922323294.2U CN211645592U (en) | 2019-12-23 | 2019-12-23 | Needle pitch adjusting mechanism and sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922323294.2U CN211645592U (en) | 2019-12-23 | 2019-12-23 | Needle pitch adjusting mechanism and sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211645592U true CN211645592U (en) | 2020-10-09 |
Family
ID=72697920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922323294.2U Active CN211645592U (en) | 2019-12-23 | 2019-12-23 | Needle pitch adjusting mechanism and sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211645592U (en) |
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2019
- 2019-12-23 CN CN201922323294.2U patent/CN211645592U/en active Active
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Address after: 318010 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee after: Jack Technology Co.,Ltd. Address before: 318010 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee before: JACK SEWING MACHINE Co.,Ltd. |