CN210684167U

CN210684167U - Back formula backstitch gauge needle adjusts drive arrangement

Info

Publication number: CN210684167U
Application number: CN201921243918.3U
Authority: CN
Inventors: 杨辉
Original assignee: Taizhou Fuqi Sewing Machine Co ltd
Current assignee: Taizhou Fuqi Sewing Machine Co ltd
Priority date: 2019-08-02
Filing date: 2019-08-02
Publication date: 2020-06-05
Anticipated expiration: 2029-08-02

Abstract

The utility model discloses a back formula backstitch gauge needle adjusts drive arrangement, transmission gauge needle adjustment mechanism include motor crank, first adjusting connecting rod, first regulating spindle crank, regulating spindle, second regulating spindle crank and second adjusting connecting rod, and motor shaft axle head is located to motor crank end cap, other formation mutual transmission connection's drive mechanism, and wherein second adjusting connecting rod rear end is used for forming with gauge needle swing seat and is connected, and the regulating spindle is parallel to each other with motor shaft axle center direction. The utility model discloses the product cooperates the regulation of step motor drive to the gauge needle swing seat through the transmission gauge needle adjustment mechanism who sets up three crank two connecting rod combination regulating spindle, alleviates the torque stress of motor shaft by multiunit transmission relation to can effectively adapt to various gauge needle regulatory function such as seam thick material, backstitch, the simple installation adjustment of being convenient for of the structure principle of part.

Description

Back formula backstitch gauge needle adjusts drive arrangement

Technical Field

The utility model relates to a sewing machine technical field specifically is a back formula backstitch gauge needle adjusts drive arrangement.

Background

The precise control of the stitch length of a sewing machine has always been a difficult problem in the industry. The conventional stitch length adjusting mechanism of the existing sewing machine is adjusted in two ways, one way is to adjust the stitch length by manually rotating a stitch length dial plate, and the adjusting way has the disadvantages of poor accuracy, unstable stitch length after the stitch length is increased and lower working efficiency; the other mode is realized by a backstitch electromagnet or a manual backstitch spanner, and the stitch coincidence is poor and the quality is low. Because of the automatic transform of realization gauge needle that the process of making up of above-mentioned two kinds of modes can not be automatic, close seam and backstitch function, can not satisfy higher sewing technique, and along with the promotion of sewing machine degree of automation, step motor is also obtaining the application gradually because of its controllable effect that has rotation angle, but step motor among the prior art generally all is simple connecting rod or crank structure promptly with gauge needle swing seat structural connection, step motor moment of torsion is great when sewing thick material, and partial spare part structure is comparatively complicated, it is inconvenient to holistic installation and adjustment, production and cost of maintenance have been increased.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is not enough to above-mentioned prior art, a be convenient for installation adjustment and adjust accurate step motor driven back formula backstitch gauge needle adjustment mechanism is provided.

In order to achieve the above purpose, the utility model provides a back formula backstitch gauge needle adjusts drive arrangement technical scheme does: a back type backstitch needle distance adjusting and driving device comprises a stepping motor and a transmission needle distance adjusting mechanism, wherein the transmission needle distance adjusting mechanism is connected with a needle distance swinging seat, a motor shaft of the stepping motor is connected with the transmission needle distance adjusting mechanism to drive the needle distance swinging seat to move, the transmission needle distance adjusting mechanism comprises a motor crank, a first adjusting connecting rod, a first adjusting shaft crank, an adjusting shaft, a second adjusting shaft crank and a second adjusting connecting rod, the end of the motor crank is sleeved at the shaft end of a motor shaft, the rear end of the motor crank is hinged with the front end of the first adjusting connecting rod, the rear end of the first adjusting connecting rod is hinged with the rear end of the first adjusting shaft crank, the end of the first adjusting shaft crank is sleeved at the front end of the adjusting shaft, the rear end of the adjusting shaft is sleeved with the second adjusting shaft crank, the rear end of the second adjusting shaft crank is hinged with the second adjusting connecting rod, and the rear end of the second adjusting connecting rod is used for being connected with the, the adjusting shaft and the motor shaft are parallel to each other in the axis direction, the adjusting shaft with the parallel axis direction and the corresponding double-connecting-rod three-crank transmission part are designed, so that the motor shaft can effectively relieve the torque of the motor shaft in driving rotation, the service life of the motor shaft is prolonged, the double-connecting-rod three-crank transmission part and the adjusting shaft are in matched transmission, various needle pitch adjusting functions such as sewing thick materials, backstitch and the like can be effectively adapted, and the whole structural part is simple in structural principle and convenient to install.

As a further scheme: first regulating spindle crank cup joints the front end cover with the regulating spindle and is equipped with the oil blanket, regulating spindle middle part axle head cover is equipped with the sleeve, and the sleeve can effectually prevent the outside oil leak of casing when installing at the corresponding tip of casing with the sealed cooperation of cup jointing of oil blanket, first regulating spindle crank, regulating spindle.

As a further scheme: motor crank, first regulating spindle crank, second regulating spindle crank and motor shaft, regulating spindle cooperation portion set up cup joints the through-hole, cup joints the through-hole outer end and is equipped with along cup jointing the adjusting screw that sets up to direction above the through-hole axis to the cooperation is equipped with adjusting screw and connects the fastening soon, and the connected mode is simple convenient, when needs pertinence adjustment, only needs adjusting screw elasticity, corresponds the crank angle who rotates corresponding position again and can realize the regulating action.

As a further scheme: connecting hole has been seted up with the crank cooperation end that corresponds and be connected to first regulation connecting rod, second regulation connecting rod, and corresponding motor crank, first regulating spindle crank, second regulating spindle crank cooperation terminal surface are equipped with the connection screw, the cooperation is equipped with connecting screw on connecting hole and the connection screw, the connecting screw middle part sets up the connecting axle and cup joints with connecting hole, and the connecting axle front end is equipped with connecting thread and is connected fixedly with the connection screw cooperation, is convenient for adjust the nimble transmission of connecting rod.

As a further scheme: the needle pitch adjusting device is characterized by being provided with a matched machine head shell, wherein a motor fixing groove is formed in the lower end of the side face of the rear part of the machine head shell, an adjusting mechanism groove is formed in the lower end of the rear end face of the machine head shell, a motor shaft hole is communicated between the motor fixing groove and the adjusting mechanism groove, an adjusting shaft positioning hole is further formed in the adjusting mechanism groove, the stepping motor is integrally and fixedly arranged in the motor fixing groove, a motor shaft extends out of the motor shaft hole to be matched and connected with a motor crank, the adjusting shaft is matched and positioned in the adjusting shaft positioning hole, the transmission needle pitch adjusting mechanism is matched and arranged in the adjusting mechanism groove, the space of the machine head shell of the sewing machine is limited due to the fact that the stepping motor structure occupies a larger space, the existing needle pitch adjusting device of the stepping motor is generally arranged at the lower end of a machine base or is fixed, the mode of setting up in this aircraft nose casing rear portion side lower extreme is not convenient very, and the adjustment work of the mechanism of adjusting of transmission needle pitch of also being convenient for goes on the basis of rational utilization space.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses the product cooperates the regulation of step motor drive to the gauge needle swing seat through the transmission gauge needle adjustment mechanism who sets up three crank two connecting rod combination regulating spindle, alleviates the torque stress of motor shaft by multiunit transmission relation to can effectively adapt to various gauge needle regulatory function such as seam thick material, backstitch, the simple installation adjustment of being convenient for of the structure principle of part.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of a back-type backstitch gauge adjustment driving device according to the present invention.

Fig. 2 is an exploded schematic view of an embodiment of the back-type backstitch gauge adjustment driving device of the present invention.

Fig. 3 is an installation schematic view of the back type backstitch gauge needle adjusting driving device of the present invention.

In fig. 1 to 3: the device comprises a stepping motor 1, a first adjusting screw 2, a motor crank 3, a first connecting screw 4, a first adjusting connecting rod 5, a second connecting screw 6, an oil seal 7, a first adjusting shaft crank 8, a second adjusting screw 9, a sleeve 10, an adjusting shaft 11, a second adjusting shaft crank 12, a second adjusting connecting rod 13, a third connecting screw 14, a third adjusting screw 15, a machine head shell 16, a motor fixing groove 161 and an adjusting mechanism groove 162.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, an embodiment of the present invention is: a back type backstitch needle distance adjusting and driving device comprises a stepping motor 1 and a transmission needle distance adjusting mechanism, wherein the transmission needle distance adjusting mechanism is connected with a needle distance swinging seat, the motor shaft of the stepping motor is connected with and drives the transmission needle distance adjusting mechanism to drive the needle distance swinging seat to move, the transmission needle distance adjusting mechanism in the embodiment comprises a motor crank 3, a first adjusting connecting rod 5, a first adjusting shaft crank 8, an adjusting shaft 11, a second adjusting shaft crank 12 and a second adjusting connecting rod 13, wherein the end of the motor crank 3 is sleeved at the shaft end of a motor shaft, the rear end is hinged with the front end of the first adjusting connecting rod 5, the rear end of the first adjusting connecting rod 5 is hinged with the rear end of the first adjusting shaft crank 8, the end of the first adjusting shaft crank 8 is sleeved at the front end of the adjusting shaft 11, the rear shaft end of the adjusting shaft 11 is sleeved with the second adjusting shaft crank 12, the rear end of the second adjusting shaft crank 12 is hinged with the second adjusting connecting rod, the rear end of the second adjusting connecting rod 13 is used for being connected with the needle pitch swinging seat, the adjusting shaft 11 is parallel to the axle center direction of the motor shaft, the rotation of the motor shaft can drive the motor crank 3 arranged on the motor shaft to rotate, the first adjusting connecting rod 5 connected with the motor crank 3 forms plane displacement to drive the first adjusting shaft crank 8 to rotate, the adjusting shaft 11 is driven to rotate, so that the second adjusting shaft crank 8 also rotates to drive the second adjusting connecting rod 13 to do plane displacement to drive the needle pitch swinging seat to do needle pitch adjustment, wherein the adjusting shaft 1 with the parallel axle center direction and a corresponding double-connecting-rod three-crank transmission part are designed, so that the torque of the motor shaft driving rotation can be effectively relieved and converted, the service life of the motor shaft is prolonged, and the double-connecting-rod three-crank transmission part and the adjusting shaft are matched for transmission, and can effectively adapt to various needle pitch adjusting functions such as thick material sewing, backstitch and the like, and the structural principle of the integral structural part is simple and convenient to install. Wherein first regulating spindle crank 8 cup joints front end cover with regulating spindle 11 and is equipped with oil blanket 7, and 11 middle part axle head covers of regulating spindle are equipped with sleeve 10, through sleeve 10 and oil blanket 7, first regulating spindle crank 8, the sealed cooperation of cup jointing of regulating spindle 11 can effectually prevent the outside oil leak of casing when installing at the casing and correspond the tip. Wherein motor crank 3, first regulating spindle crank 8, second regulating spindle crank 12 and motor shaft, 11 cooperation portions of regulating spindle set up and cup joint the through-hole, cup joint the through-hole outer end and be equipped with along cup jointing the regulation screw that sets up to the direction above the through-hole axis, and the cooperation is equipped with adjusting screw and connects the fastening soon, it is first adjusting screw 2 respectively to correspond adjusting screw, second adjusting screw 9, third adjusting screw 15, the connected mode of formation is simple convenient, when needs pertinence adjustment, only need adjust adjusting screw elasticity, correspond again and rotate the crank angle that corresponds the position and can realize the regulating action.

In addition, the first adjusting connecting rod 5, the second adjusting connecting rod 13 and the corresponding connecting end of the crank are provided with connecting through holes, the corresponding matching end surfaces of the motor crank 3, the first adjusting shaft crank 8 and the second adjusting shaft crank 12 are provided with connecting screw holes, the connecting through holes and the connecting screw holes are provided with connecting screws in a matching mode and are respectively set as a first connecting screw 4, a second connecting screw 6 and a third connecting screw 14 in a corresponding mode, the middle of each connecting screw is provided with a connecting shaft which is sleeved with the corresponding connecting through hole, and the front end of each connecting shaft is provided with connecting threads which are matched with the corresponding connecting screw holes to be connected and fixed, so that the adjusting connecting.

In this embodiment, corresponding to the structural design of the stepping motor and the transmission needle pitch adjusting mechanism in the above embodiments, a head housing 16 is designed to be connected in a matching manner, wherein a motor fixing groove 161 is formed at the lower end of the rear side surface of the head housing, an adjusting mechanism groove 162 is formed at the lower end of the rear end surface, a motor shaft hole is formed between the motor fixing groove 161 and the adjusting mechanism groove 162 to be communicated, an adjusting shaft positioning hole is further formed on the adjusting mechanism groove 162, the stepping motor 1 is integrally and fixedly arranged in the motor fixing groove, a motor shaft extends out of the motor shaft hole to be connected with a motor crank in a matching manner, an adjusting shaft 11 is positioned in the adjusting shaft positioning hole in a matching manner, the transmission needle pitch adjusting mechanism is arranged in the adjusting mechanism groove 162 in a matching manner, because the stepping motor structure occupies a large space, the sewing machine head housing space is limited, the existing stepping motor needle, therefore, the butted transmission needle pitch adjusting mechanism is generally arranged at the lower end of the machine base or at the inner end of the machine head shell, and is very inconvenient when a fault occurs or adjustment and change are needed, and the mode of arranging the transmission needle pitch adjusting mechanism at the lower end of the rear side surface of the machine head shell is convenient for the adjustment work of the transmission needle pitch adjusting mechanism on the basis of reasonably utilizing the space.

The principle of the utility model is that: the utility model discloses the product cooperates the regulation of step motor drive to the gauge needle swing seat through the transmission gauge needle adjustment mechanism who sets up three crank two connecting rod combination regulating spindle, alleviates the torque stress of motor shaft by multiunit transmission relation to can effectively adapt to various gauge needle regulatory function such as seam thick material, backstitch, the simple installation adjustment of being convenient for of the structure principle of part.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a back formula backstitch gauge needle adjusts drive arrangement, includes step motor and transmission gauge needle adjustment mechanism, and transmission gauge needle adjustment mechanism is connected with gauge needle swing seat, and step motor shaft connection drives transmission gauge needle adjustment mechanism transmission and drives gauge needle swing seat action, its characterized in that: the transmission needle pitch adjusting mechanism comprises a motor crank, a first adjusting connecting rod, a first adjusting shaft crank, an adjusting shaft, a second adjusting shaft crank and a second adjusting connecting rod, the end of the motor crank is sleeved at the end of the motor shaft, the rear end of the motor crank is hinged to the front end of the first adjusting connecting rod, the rear end of the first adjusting connecting rod is hinged to the rear end of the first adjusting shaft crank, the end of the first adjusting shaft crank is sleeved at the front end of the adjusting shaft, the end of the rear end of the adjusting shaft is sleeved with the second adjusting shaft crank, the rear end of the second adjusting shaft crank is hinged to the second adjusting connecting rod, the rear end of the second adjusting connecting rod is used for being connected with a needle pitch swing seat, and the adjusting shaft is parallel to the axis direction of the motor shaft.

2. A back backstitch gauge adjustment drive as claimed in claim 1, characterized in that: the first adjusting shaft crank and the adjusting shaft are sleeved with an oil seal at the front end, and a sleeve is sleeved at the middle shaft end of the adjusting shaft.

3. A back backstitch gauge adjustment drive as claimed in claim 1, characterized in that: the motor crank, the first adjusting shaft crank, the second adjusting shaft crank, the motor shaft and the adjusting shaft matching part are provided with sleeving through holes, adjusting screw holes are formed in the outer ends of the sleeving through holes in the axial direction of the sleeving through holes, and adjusting screws are arranged in the sleeving through holes in a screwing mode and fastened in a matching mode.

4. A back backstitch gauge adjustment drive as claimed in claim 1, characterized in that: connecting hole has been seted up with each crank cooperation end that corresponds and be connected to first regulation connecting rod, second regulation connecting rod, and corresponding motor crank, first regulating spindle crank, second regulating spindle crank cooperation terminal surface are equipped with the connection screw, the cooperation is equipped with connecting screw on connecting hole and the connection screw, connecting screw middle part sets up the connecting axle and cup joints with connecting hole, and the connecting axle front end is equipped with connecting thread and is connected fixedly with the connection screw cooperation.

5. A back backstitch gauge adjustment drive as claimed in any one of claims 1 to 4, wherein: be equipped with complex aircraft nose casing, the motor fixed slot has been seted up to aircraft nose casing rear portion side lower extreme, and adjustment mechanism groove has been seted up to the rear end face lower extreme, be equipped with motor shaft hole intercommunication between motor fixed slot and the adjustment mechanism groove, still be equipped with the regulating spindle locating hole on the adjustment mechanism groove, step motor monolithic stationary sets up in the motor fixed slot, and the motor shaft stretches out the motor shaft hole and is connected with the cooperation of motor crank, and the interior location of regulating spindle cooperation regulating spindle locating hole, adjustment mechanism inslot is located in the cooperation of transmission gauge needle adjustment mechanism.