CN215925269U - Automatic differential ratio and needle pitch adjusting mechanism suitable for overedger and overedger - Google Patents
Automatic differential ratio and needle pitch adjusting mechanism suitable for overedger and overedger Download PDFInfo
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- CN215925269U CN215925269U CN202122509888.XU CN202122509888U CN215925269U CN 215925269 U CN215925269 U CN 215925269U CN 202122509888 U CN202122509888 U CN 202122509888U CN 215925269 U CN215925269 U CN 215925269U
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Abstract
The utility model discloses an automatic differential ratio and needle pitch adjusting mechanism suitable for a overedger, wherein a first output cam and a second output cam are fixedly sleeved on an output shaft of a stepping motor, a first push rod and a first limiting spring are sequentially sleeved on a needle pitch holding push rod, the first output cam is contacted with the first push rod, a ratchet part is arranged at the end part of the needle pitch holding push rod, the ratchet part is meshed with a ratchet wheel, the ratchet wheel is fixed on a ratchet wheel shaft, a shaft sleeve is fixedly sleeved on the ratchet wheel shaft, a needle pitch adjusting crank is fixedly sleeved on the shaft sleeve, a needle pitch adjusting connecting rod is rotatably connected on the needle pitch adjusting crank, the needle pitch adjusting connecting rod is connected with a needle opening eccentric cam through a needle bearing, and the needle opening eccentric cam is connected to a cloth feeding assembly; the second output cam is movably connected with a differential adjusting connecting rod, the differential adjusting connecting rod is movably connected with a differential adjusting lever, the differential adjusting lever is fixed with the differential shaft, a mechanism which is driven by a motor and can automatically adjust the needle pitch and the differential ratio replaces manpower, and the production efficiency can be improved.
Description
Technical Field
The utility model relates to an automatic differential ratio and needle distance adjusting mechanism suitable for an overlock machine and the overlock machine.
Background
The overedger needs to frequently adjust the needle pitch and the differential ratio in order to meet the requirements of different fabrics during working, the conventional adjusting method is generally manual adjustment, the efficiency is low, manpower is wasted, and accurate adjustment cannot be realized.
Disclosure of Invention
The object of the present invention is to solve the technical drawbacks mentioned in the background.
In order to achieve the above object, in a first aspect, the present invention provides an automatic differential ratio and needle pitch adjusting mechanism suitable for an overlock sewing machine, including a stepping motor and a needle pitch clasping push rod, wherein an output shaft of the stepping motor is fixedly sleeved with a first output cam and a second output cam, the needle pitch clasping push rod is sequentially sleeved with a first push rod and a first limit spring, the first output cam contacts with the first push rod, an end portion of the needle pitch clasping push rod is provided with a ratchet portion, the ratchet portion is engaged with a ratchet wheel, the ratchet wheel is fixed on a ratchet wheel shaft, a shaft sleeve is fixedly sleeved on the ratchet wheel shaft, a needle pitch adjusting crank is fixedly sleeved on the shaft sleeve, the needle pitch adjusting crank is rotatably connected with a needle pitch adjusting connecting rod, the needle pitch adjusting connecting rod is connected with an opening eccentric cam through a needle bearing, and the opening eccentric cam sequentially passes through a needle pitch locking spring, The limiting sleeve and the fixing screw are connected to a cloth feeding assembly arranged on the main shaft, and the main shaft is supported in a main shaft bearing; the second output cam is movably connected with a differential adjusting connecting rod, the differential adjusting connecting rod is movably connected with a differential adjusting lever, and the differential adjusting lever is fixed with the differential shaft.
Furthermore, the stepping motor is fixed on the casing through a motor mounting plate, a pair of coaxial shaft seats is arranged on the motor mounting plate, and the needle pitch holding push rod is slidably arranged in the shaft seats in a penetrating manner.
Further, the needle opening eccentric cam comprises an eccentric shaft section.
In a second aspect, the utility model provides an overlock machine, comprising the automatic differential ratio and gauge mechanism suitable for an overlock machine according to any one of the first aspect.
Compared with the prior art, the utility model has the beneficial effects that:
the mechanism driven by the motor and capable of automatically adjusting the needle pitch and the differential ratio replaces manpower, and production efficiency can be improved.
Drawings
FIG. 1 is a state diagram of the use of one embodiment of the mechanism of the present invention;
FIG. 2 is a schematic view of the pitch adjustment portion of an embodiment of the mechanism of the present invention;
FIG. 3 is an exploded view of the gauge adjustment portion of one embodiment of the mechanism of the present invention;
FIG. 4 is a schematic diagram of the differential adjustment portion of one embodiment of the mechanism of the present invention;
FIG. 5 is a schematic structural view of an opening eccentric cam in an embodiment of the mechanism of the present invention, wherein (a) is a front view and (b) is a sectional view taken along line A-A of (a);
FIG. 6 is a state diagram of the use of one embodiment of the mechanism of the present invention;
fig. 7 is a schematic diagram of the operation state transition of one embodiment of the mechanism of the present invention.
In the figure, a stepping motor 1, a motor mounting plate 2, a first output cam 3, a first push rod 4, a first limit spring 5, a needle pitch holding push rod 6, a ratchet 7, a ratchet shaft 8, a shaft sleeve 9, a needle pitch adjusting crank 10, a cloth feeding assembly 11, a needle pitch adjusting connecting rod 12, a needle roller bearing 13, a needle opening eccentric cam 14, a needle pitch locking spring 15, a limit sleeve 16, a fixing screw 17, a main shaft bearing 18, a second output cam 22, a differential adjusting connecting rod 23, a differential adjusting lever 24 and a differential shaft 25.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 7, an embodiment of the present invention, which is suitable for an automatic differential ratio and needle pitch adjusting mechanism of an overlock sewing machine, includes a stepping motor 1 and a needle pitch clasping push rod 6, a first output cam 3 and a second output cam 22 are sleeved and fixed on an output shaft of the stepping motor 1, a first push rod 4 and a first limit spring 5 are sequentially sleeved and fixed on the needle pitch clasping push rod 6, the first output cam 3 contacts with the first push rod 4, an end of the needle pitch clasping push rod 6 has a ratchet part, the ratchet part is engaged with a ratchet 7, the ratchet 7 is fixed on a ratchet shaft 8, a sleeve 9 is sleeved and fixed on the ratchet shaft 8, a needle pitch adjusting crank 10 is sleeved and fixed on the sleeve 9, a needle pitch adjusting link 12 is rotatably connected on the needle pitch adjusting crank 10, the needle pitch adjusting link 12 is connected with an open needle eccentric cam 14 through a needle bearing 13, the needle opening eccentric cam 14 is connected to a cloth feeding assembly 11 arranged on a main shaft in sequence through a needle pitch locking spring 15, a limiting sleeve 16 and a fixing screw 17, and the main shaft is supported in a main shaft bearing 18; the second output cam 22 is movably connected with a differential adjusting connecting rod 23 through a shaft position screw, the differential adjusting connecting rod 23 is movably connected with a differential adjusting lever 24 through the shaft position screw, the differential adjusting lever 24 is fixed with a differential shaft 25, a clamping groove is arranged on the differential shaft 25, and the differential adjusting lever 24 is installed in the clamping groove and fixed through a screw.
In one embodiment, the stepping motor 1 is fixed on the casing through a motor mounting plate 2, a pair of coaxial shaft seats is arranged on the motor mounting plate 2, and the needle pitch holding push rod 6 is slidably arranged in the shaft seats in a penetrating manner.
In one embodiment, the needle opening eccentric cam 14 comprises an eccentric shaft segment.
The differential state of the stepping motor 1 is locked to be synchronous at the initial origin, the stepping motor 1 rotates clockwise to drive the second output cam 22 to rotate clockwise, the second output cam 22 drives the differential adjusting connecting rod 23 to move leftwards, the differential adjusting connecting rod 23 drives the differential adjusting lever 24 to swing leftwards, the differential adjusting lever 24 drives the differential shaft 25 to rotate anticlockwise, the differential shaft 25 drives the original differential part to move, so that the differential changes from synchronous to inverse difference until the mechanism limit inverse difference, the stepping motor 1 rotates anticlockwise to drive the second output cam 22 to rotate anticlockwise, the second output cam 22 drives the differential adjusting connecting rod 23 to move rightwards, the differential adjusting connecting rod 23 drives the differential adjusting lever 24 to swing rightwards, the differential adjusting lever 24 drives the differential shaft 25 to rotate clockwise, the differential shaft 25 drives the original differential part to move, so that the differential changes from synchronous to direct difference until the mechanism limit direct difference, therefore, the required differential ratio can be obtained by controlling the motor to rotate for a certain angle, and the motor position is set to be the original position at the moment, so that the differential ratio during working is locked.
In the embodiment, the original needle pitch locking ratchet structure is cancelled, the original needle punching eccentric cam structure is improved, the improved needle punching eccentric cam 14 is provided with an eccentric shaft section, the needle punching eccentric cam 14 and the cloth feeding assembly 11 are relatively fixed during normal work through spring compression and extrusion through a needle pitch locking spring 15, a limiting sleeve 16 and a fixing screw 17, the characteristic of the eccentric shaft section is newly added to the needle punching eccentric cam 14, the needle pitch adjusting connecting rod 12 and a needle pitch adjusting crank 10 are connected to the ratchet shaft 8, during normal work, due to the existence of the characteristic of the eccentric shaft section of the needle punching eccentric cam 14, the cloth feeding assembly 11 and the needle punching eccentric cam 14 are driven to rotate by a main shaft, the ratchet shaft 8 is inevitably driven to rotate back and forth through the characteristic of the eccentric shaft section, the stepping motor 1 drives the first output cam 3 to rotate back and forth, at the moment, the differential ratio begins to change from synchronous to sequential to the limit of the mechanism, the motor continues to rotate, the differential ratio begins to fall back, meanwhile, the first output cam 3 begins to push the first push rod 4 to move rightwards, the first limit spring 5 is compressed, the first push rod 4 drives the needle pitch holding push rod 6 to move rightwards, the end part of the needle pitch holding push rod 6 is of a ratchet characteristic, when moving rightwards, the first output cam 3 is meshed with the ratchet 7, the ratchet shaft 8 is further fixed, the needle pitch adjusting crank 10 is relatively fixed, the needle pitch adjusting connecting rod 12 and the needle opening eccentric cam 14 are further fixed, the purpose of adjusting the needle pitch can be achieved by only driving the spindle motor to rotate for a certain angle, the cloth feeding assembly 11 and the needle opening eccentric cam 14 rotate relatively, after the required needle pitch is obtained, the stepping motor 1 drives the first output cam 3 to reset, the first limit spring 5 drives the needle pitch holding push rod 6 to reset, the cloth feeding assembly 11 and the needle opening eccentric cam 14 are separated from the ratchet 7 in a meshed state, and the cloth feeding assembly 11 and the needle opening eccentric cam 14 return to a relatively fixed state, the stitch length is locked and the differential ratio is returned to the original setting.
When the differential ratio is adjusted, the differential ratio is changed from the set transmission ratio to the limit sequential difference and then is synchronously changed from the limit sequential difference, and when the needle distance is adjusted, the differential ratio returns to the set differential ratio state when the stepping motor 1 returns to the original point.
An embodiment of the overedger according to the present invention, including the automatic differential ratio and gauge mechanism for an overedger described in any of the embodiments of the automatic differential ratio and gauge mechanism for an overedger, also has its advantages, and will not be described herein again.
The control software related to the utility model adopts the prior art.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations can be made by the worker in the light of the above teachings without departing from the spirit of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (4)
1. The automatic differential ratio and needle pitch adjusting mechanism suitable for the overedger is characterized by comprising a stepping motor (1) and a needle pitch holding push rod (6), wherein a first output cam (3) and a second output cam (22) are fixedly sleeved on an output shaft of the stepping motor (1), a first push rod (4) and a first limiting spring (5) are sequentially sleeved on the needle pitch holding push rod (6), the first output cam (3) is in contact with the first push rod (4), a ratchet part is arranged at the end part of the needle pitch holding push rod (6) and meshed with a ratchet wheel (7), the ratchet wheel (7) is fixedly arranged on a ratchet wheel shaft (8), a shaft sleeve (9) is fixedly sleeved on the ratchet wheel shaft (8), a needle pitch adjusting crank (10) is fixedly sleeved on the shaft sleeve (9), and a needle pitch adjusting connecting rod (12) is rotatably connected on the needle pitch adjusting crank (10), the needle pitch adjusting connecting rod (12) is connected with an open needle eccentric cam (14) through a needle bearing (13), the open needle eccentric cam (14) is connected to a cloth feeding assembly (11) arranged on a main shaft through a needle pitch locking spring (15), a limiting sleeve (16) and a fixing screw (17) in sequence, and the main shaft is supported in a main shaft bearing (18); the second output cam (22) is movably connected with a differential adjusting connecting rod (23), the differential adjusting connecting rod (23) is movably connected with a differential adjusting lever (24), and the differential adjusting lever (24) is fixed with a differential shaft (25).
2. The automatic differential ratio and gauge mechanism for overedger according to claim 1, characterized in that said stepping motor (1) is fixed to the casing by means of a motor mounting plate (2), said motor mounting plate (2) being provided with a pair of coaxial shaft seats, said gauge holding push rod (6) being slidably inserted in said shaft seats.
3. The mechanism for automatically adjusting the differential ratio and the gauge of a overedger according to claim 1, characterized in that said needle opening eccentric cam (14) comprises an eccentric shaft segment.
4. An overlock machine comprising an automatic differential ratio and gauge mechanism as claimed in any one of claims 1 to 3 adapted for use in an overlock machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122509888.XU CN215925269U (en) | 2021-10-19 | 2021-10-19 | Automatic differential ratio and needle pitch adjusting mechanism suitable for overedger and overedger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122509888.XU CN215925269U (en) | 2021-10-19 | 2021-10-19 | Automatic differential ratio and needle pitch adjusting mechanism suitable for overedger and overedger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215925269U true CN215925269U (en) | 2022-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122509888.XU Active CN215925269U (en) | 2021-10-19 | 2021-10-19 | Automatic differential ratio and needle pitch adjusting mechanism suitable for overedger and overedger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215925269U (en) |
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2021
- 2021-10-19 CN CN202122509888.XU patent/CN215925269U/en active Active
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