CN218989590U

CN218989590U - Driving mechanism for lifting presser foot of flat seaming machine

Info

Publication number: CN218989590U
Application number: CN202223371657.8U
Authority: CN
Inventors: 周善足; 蒋达淼; 任恩林
Original assignee: Taizhou Supu Electromechanical Co ltd
Current assignee: Taizhou Supu Electromechanical Co ltd
Priority date: 2022-12-13
Filing date: 2022-12-13
Publication date: 2023-05-09
Anticipated expiration: 2032-12-13

Abstract

The utility model provides a driving mechanism for lifting a presser foot of a flat seaming machine, and belongs to the technical field of flat seaming machines. The technical problem that the existing flat seaming machine is insufficient in presser foot lifting driving reliability is solved. In this flat seaming machine lifts actuating mechanism of presser foot, flat seaming machine includes casing and driving motor, driving mechanism including rotate connect in the casing and control the presser foot lift axle of horizontal arrangement, driving motor with lift the presser foot lift axle parallel arrangement, this driving motor is close to the one side that lifts the presser foot place and has the drive shaft that stretches out, the end of drive shaft has set firmly the cam, the tip periphery of lifting the presser foot lift axle is connected with the drive crank, the cam with the drive crank supports along fore-and-aft direction and leans on. The utility model is beneficial to guaranteeing the reliability of the transmission work of the presser foot lifting.

Description

Driving mechanism for lifting presser foot of flat seaming machine

Technical Field

The utility model belongs to the technical field of flat seaming machines, and relates to a driving mechanism for lifting presser feet of a flat seaming machine.

Background

The flat seaming machine is an industrial sewing machine which uses two types of stitches of a needle and a shuttle to enable the shuttle thread to form single-sided covered chain stitch on the bottom surface of the seam material, or adds covered threads on the front surface of the seam material to form double-sided covered chain stitch, and sews two or more layers of seam materials. The operation of trimming, feeding and controlling the presser foot lifting is involved in the working process of the flat seaming machine, and a driving mechanism is required to be designed for realizing the operation.

The patent issued to CN215251627U discloses a joint debugging mechanism for controlling a thread cutting mechanism and a stitch length adjusting mechanism in a flat seaming machine, the joint debugging mechanism comprising a drive source assembly, a drive member and a drive assembly, the drive member 20 further comprising a third zone 241. The third region 241 can be correspondingly acted on the presser foot lifting mechanism 260 under the action of the driving source 11, and can control the operation of the presser foot lifting mechanism 260.

In the mechanism, the driving motor is vertically arranged with the presser foot lifting driving shaft, the cam on the driving motor drives the driving plate to swing up and down, and then the presser foot lifting swinging rod is pulled to swing through the presser foot lifting pulling rod, and as the driving plate rotates again, the driving plate can swing left and right simultaneously so as to generate left and right tensile unbalanced load on the presser foot lifting swinging rod, the axial position of the presser foot lifting driving shaft is easily influenced by long-term action, meanwhile, the transmission distance of the presser foot lifting driving shaft is longer, the loss and error in the transmission process are easily increased, and the transmission reliability is further influenced.

Disclosure of Invention

The utility model aims at the problems existing in the prior art, and provides a driving mechanism for lifting a presser foot of a flat seaming machine, which aims at solving the technical problems that: the transmission reliability of the presser foot is ensured.

The aim of the utility model can be achieved by the following technical scheme:

the utility model provides a flat seaming machine lifts actuating mechanism of presser foot, flat seaming machine includes casing and driving motor, driving mechanism including rotate connect in the casing and control the presser foot lift axle that the level was arranged, its characterized in that, driving motor with lift presser foot lift axle parallel arrangement, this driving motor be close to lift one side that the presser foot was located have the drive shaft that stretches out, the stretching out of drive shaft sets firmly the cam, the tip periphery of lift presser foot lift axle is connected with the drive crank, the cam with the drive crank supports along fore-and-aft direction and leans on.

The casing is protective housing and the mounting platform of flat seaming machine inner assembly, and driving motor is the power supply that the control lifted the presser foot activity, lifts the presser foot lift shaft and is prior art, lifts the presser foot lift shaft left and right sides direction arrangement accessible rotation drive current lift the presser foot and reciprocate and realize promoting control effect. The driving motor is parallel to the presser foot lifting shaft, the driving shaft extending out from one side of the presser foot lifting shaft, where the driving motor is close to the presser foot lifting shaft, is fixedly provided with the cam, and is abutted against the transmission crank connected with the end part of the presser foot lifting shaft along the front-rear direction, so that the end part of the output shaft is arranged at a position closer to the presser foot lifting shaft by fully utilizing the length of the driving motor, the length of the presser foot lifting shaft is reduced, the transmission loss is reduced, and simultaneously, the interaction force between the cam and the transmission crank is the torque force of circumferential arrangement around the presser foot lifting shaft, so that the interference to the axial position of the presser foot lifting shaft is reduced, the position of the presser foot lifting shaft cannot axially float, and the reliability of the presser foot lifting transmission work is further ensured.

In the driving mechanism for lifting the presser foot of the flat seaming machine, an end of the outer circumferential surface of the cam farthest from the axial line of the driving shaft is provided with an abutting and holding surface, and the abutting and holding surface is concave, planar or approximately planar. Therefore, when the cam rotates to the position where the supporting surface contacts with the transmission crank, the presser foot is lifted to the maximum height, the contact positions of the driving shaft, the supporting surface and the transmission crank are positioned on the same straight line, and at the moment, the transmission crank can keep a mechanical locking state under the action of static friction due to the fact that the transmission crank cannot be influenced by the guiding of the supporting surface, namely, the driving motor does not need to be locked in a charged mode, and therefore heating of the motor is reduced, cost is saved, and the service life is guaranteed.

In the driving mechanism for lifting the presser foot of the flat seaming machine, the transmission crank comprises a crank body and a rolling bearing rotatably connected to the crank body, the rolling bearing is parallel to the presser foot lifting shaft, and the outer peripheral surface of the cam abuts against the outer peripheral surface of the rolling bearing. Therefore, the action between the cam and the transmission crank can be converted into rolling friction through the rolling bearing, the shape stability of the contact surface is ensured, the component loss under high-frequency operation is further reduced, and meanwhile, the long-term transmission of the cam is ensured to be reliable and accurate.

In the driving mechanism for lifting the presser foot of the flat seaming machine, a lubricating shaft sleeve is sleeved on the periphery of the presser foot lifting shaft, the lubricating shaft sleeve is embedded in the machine shell, and the transmission crank is arranged adjacent to the lubricating shaft sleeve along the length direction of the presser foot lifting shaft. The lubricating shaft sleeve can ensure smooth rotation of the presser foot lifting shaft, and meanwhile, the presser foot lifting shaft close to the lubricating shaft sleeve part has higher supporting rigidity, so that accurate and reliable motion of the transmission crank is ensured.

In the driving mechanism for lifting the presser foot of the flat seaming machine, the crank body is provided with the abdication groove, and the rolling bearing is positioned in the abdication groove. The arrangement position of the rolling bearing is more close to the middle of the crank body, so that unbalanced load of acting force transmitted by the crank body is reduced, meanwhile, the installation positioning and the guide can be provided for the driving motor during installation, the position is accurate during installation, and the reliable rotating effect of the presser foot lifting shaft is guaranteed.

In the driving mechanism for lifting the presser foot of the flat seaming machine, the transmission crank is detachably connected with the presser foot lifting shaft. Thus, the split maintenance is facilitated when the transmission crank or the presser foot lifting shaft is worn, and the cost is saved.

In the driving mechanism for lifting the presser foot of the flat seaming machine, the side surface of the top of the machine shell is provided with a containing groove, and the driving motor is embedded in the containing groove. The driving motor is more close to the presser foot lifting shaft in the shell, transmission distance loss is reduced, and transmission reliability is guaranteed.

In the driving mechanism for lifting the presser foot of the flat seaming machine, the flat seaming machine comprises a thread cutting assembly and a thread loosening assembly, and the other end of the driving shaft extends out of the driving motor and is in transmission fit with the thread cutting assembly and the thread loosening assembly. The other end of the same driving motor drives the existing thread cutting assembly and the existing thread loosening assembly to move, and therefore the cost of the components is saved.

Compared with the prior art, the utility model has the following advantages:

the driving mechanism for the presser foot of the flat seaming machine fully utilizes the length of the driving motor to arrange the end part of the output shaft at a position closer to the presser foot lifting shaft, further reduces the transmission loss by reducing the length of the presser foot lifting shaft, and simultaneously, the interaction force of the cam and the transmission crank is the torsion effect arranged around the circumference of the presser foot lifting shaft, so that the interference to the axial position of the presser foot lifting shaft is reduced, and the reliability of the presser foot lifting transmission work is further ensured.

Drawings

Fig. 1 is a schematic perspective view of a flat seaming machine according to this embodiment.

Fig. 2 is a schematic perspective view of a hidden part of the casing of the flat seaming machine in this embodiment.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is a schematic view of a cross-sectional structure of the flat seaming machine in the right-left direction in this embodiment.

Fig. 5 is a schematic view of a cross-sectional structure of the flat seaming machine in the front-rear direction in this embodiment.

Fig. 6 is a schematic view of a partial explosion structure of the presser foot lifting shaft, the transmission crank and the lubrication sleeve in this embodiment.

In the figure, 1, a shell; 11. a receiving groove;

2. a driving motor; 21. a drive shaft;

3. a presser foot lifting shaft;

4. a cam; 41. against the retaining surface;

5. a drive crank; 51. a crank body; 511. a relief groove; 52. a rolling bearing;

6. a lubrication sleeve; 7. a wire cutting assembly; 8. and a thread loosening assembly.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1-6, in the driving mechanism for lifting the presser foot of the flat seaming machine, the flat seaming machine comprises a machine shell 1 and a driving motor 2, the driving mechanism comprises a presser foot lifting shaft 3 which is rotatably connected in the machine shell 1 and horizontally arranged left and right, the driving motor 2 is arranged in parallel with the presser foot lifting shaft 3, one side of the driving motor 2, which is close to the presser foot lifting position, is provided with a protruded driving shaft 21, the protruded end of the driving shaft 21 is fixedly provided with a cam 4, the end part of the presser foot lifting shaft 3 is connected with a transmission crank 5 which is radially arranged, and the cam 4 is abutted against the transmission crank 5 along the front and rear directions. The casing 1 is a protective shell and a mounting platform of an inner component of the flat seaming machine, the driving motor 2 is a power source for controlling the motion of the presser foot, the presser foot lifting shaft 3 is in the prior art, and the left and right directions of the presser foot lifting shaft 3 are arranged to drive the existing presser foot lifting motion up and down through autorotation so as to achieve the lifting control effect. Through setting up driving motor 2 and lifting presser foot lift shaft 3 parallel to make driving motor 2 be close to lifting the drive shaft 21 that the presser foot place stretches out and set firmly cam 4, with lifting the drive crank 5 of the end connection of presser foot lift shaft 3 along the fore-and-aft direction support, make full use of driving motor 2 own length is with the end position of output shaft arrange in the position that is close to lifting the presser foot more like this, and then utilize to reduce the length of lifting presser foot lift shaft 3, reduce transmission loss, simultaneously cam 4 with drive crank 5's interact force all be around lifting the torsion effect that the circumference of presser foot lift shaft 3 was arranged, reduce the interference to lifting presser foot lift shaft 3 axial position, and then ensure the reliability of lifting presser foot transmission work. Further, the end of the outer peripheral surface of the cam 4 farthest from the axial line of the drive shaft 21 has an abutment holding surface 41, and the abutment holding surface 41 is a low curvature surface of an approximate plane. Thus, when the cam 4 rotates to the contact state of the abutting and holding surface 41 and the transmission crank 5, the presser foot is lifted to the maximum height, the contact positions of the driving shaft 21, the abutting and holding surface 41 and the transmission crank 5 are positioned on the same straight line, and at the moment, the transmission crank 5 can keep a mechanical locking state under the action of static friction without being influenced by the guiding of the abutting and holding surface 41, namely, the driving motor 2 does not need to be locked in a charged state, thereby reducing the heating of the motor, saving the cost and ensuring the service life. The transmission crank 5 includes a crank body 51 and a rolling bearing 52 rotatably connected to the crank body 51, the rolling bearing 52 being parallel to the presser foot lifting shaft 3, and the outer peripheral surface of the cam 4 being abutted against the outer peripheral surface of the rolling bearing 52. The action between the cam 4 and the transmission crank 5 can be converted into rolling friction through the rolling bearing 52, so that the shape stability of the contact surface is ensured, the component loss under high-frequency operation is further reduced, and meanwhile, the long-term transmission of the cam 4 is ensured to be reliable and accurate. The periphery of the presser foot lifting shaft 3 is sleeved with a lubrication shaft sleeve, the lubrication shaft sleeve is embedded in the machine shell 1, and the transmission crank 5 is adjacently arranged with the lubrication shaft sleeve along the length direction of the presser foot lifting shaft 3. The lubricating shaft sleeve can ensure smooth rotation of the presser foot lifting shaft 3, and meanwhile, the presser foot lifting shaft 3 close to the lubricating shaft sleeve part has higher supporting rigidity, so that accurate and reliable movement of the transmission crank 5 is ensured. The crank body 51 has a relief groove 511, and the rolling bearing 52 is located in the relief groove 511. The arrangement position of the rolling bearing 52 is more close to the middle of the crank body 51, so that the unbalanced load of the acting force transmitted by the crank body 51 is reduced, meanwhile, the installation positioning and the guide can be provided for the driving motor 2 during installation, the position is accurate during installation, and the reliable rotating effect of the presser foot lifting shaft 3 is guaranteed. The transmission crank 5 is detachably connected with the presser foot lifting shaft 3 through bolts and a tightening structure. Thus, the split maintenance is facilitated when the transmission crank 5 or the presser foot lifting shaft 3 is worn, and the cost is saved.

As shown in fig. 1-3 and fig. 5, the top side of the casing 1 is provided with a containing groove 11, and the driving motor 2 is embedded in the containing groove 11. Thus, the driving motor 2 is more close to the presser foot lifting shaft 3 in the shell 1, the transmission distance loss is reduced, and the transmission reliability is ensured. The flat seaming machine comprises a thread cutting assembly and a thread loosening assembly, wherein the thread cutting assembly and the thread loosening assembly can be matched with the other end of the driving shaft 21 by adopting the prior assembly to drive a swing arm structure and a driving wheel in a transmission way. The other end of the same driving motor 2 drives the existing thread cutting assembly and the existing thread loosening assembly to move, so that the cost of the components is saved.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. The utility model provides a flat seaming machine lifts actuating mechanism of presser foot, flat seaming machine includes casing (1) and driving motor (2), driving mechanism including rotate connect in casing (1) and control presser foot lift axle (3) that the level was arranged, a serial communication port, driving motor (2) with lift presser foot lift axle (3) parallel arrangement, this driving motor (2) are close to one side that lifts the presser foot place have drive shaft (21) that stretches out, the stretching out of drive shaft (21) holds and sets firmly cam (4), the tip periphery of lifting presser foot lift axle (3) is connected with drive crank (5), cam (4) with drive crank (5) are along fore-and-aft direction support.

2. The drive mechanism for lifting presser feet of flat seaming machine according to claim 1, characterized in that the end of the outer peripheral surface of the cam (4) furthest from the axis of the drive shaft (21) has an abutment holding surface (41), the abutment holding surface (41) being concave, planar or approximately planar.

3. The drive mechanism for lifting a presser foot of a flat seaming machine according to claim 1, characterized in that the transmission crank (5) includes a crank body (51) and a rolling bearing (52) rotatably connected to the crank body (51), the rolling bearing (52) being parallel to the presser foot lifting shaft (3), and the outer peripheral surface of the cam (4) being abutted against the outer peripheral surface of the rolling bearing (52).

4. A driving mechanism for lifting a presser foot of a flat seaming machine according to claim 1, 2 or 3, characterized in that a lubricating shaft sleeve (6) is sleeved on the periphery of the lifting shaft (3), the lubricating shaft sleeve (6) is embedded in the machine shell (1), and the transmission crank (5) is arranged adjacent to the lubricating shaft sleeve (6) along the length direction of the lifting shaft (3).

5. A driving mechanism for lifting presser feet of flat seaming machine according to claim 3, characterized in that said crank body (51) has a relief groove (511), said rolling bearing (52) being located in said relief groove (511).

6. The drive mechanism for lifting the presser foot of the flat seaming machine according to claim 1, characterized in that the transmission crank (5) is detachably connected with the presser foot lifting shaft (3).

7. A driving mechanism for lifting presser feet of flat seaming machine according to claim 1, 2 or 3, characterized in that the top side of the casing (1) has a receiving groove (11), and the driving motor (2) is embedded in the receiving groove (11).

8. A driving mechanism for lifting a presser foot of a flat seaming machine according to claim 1, 2 or 3, characterized in that the flat seaming machine further comprises a thread cutting assembly (7) and a thread loosening assembly (8), and the other end of the driving shaft (21) extends out of the driving motor (2) and is in transmission fit with the thread cutting assembly (7) and the thread loosening assembly (8).