阅读说明：本技术 一种适用于电脑横机的夹纱装置 (Yarn clamping device suitable for computerized flat knitting machine ) 是由 吴迪 陈群方 姜亚东 于 2021-03-19 设计创作，主要内容包括：本发明公开了一种适用于电脑横机的夹纱装置,包括有开合夹纱件、传动件、凸轮和弹性件,开合夹纱件连接传动件,开合夹纱件的开合由传动件在开合方向上的反复运动控制,凸轮连接有回转驱动装置,凸轮接触传动件并通过转动使传动件产生位移,弹性件连接传动件并通过收缩使传动件产生位移,弹性件的收缩方向与凸轮的推动方向相反,凸轮的推动力大于弹性件的弹力,凸轮通过传动件推动开合夹纱件张开,弹性件通过传动件拉动开合夹纱件收合,采用凸轮和弹性件相互配合以完成开合夹纱件的开合,本发明结构简洁紧凑,体积小巧,易于制造,无需设计多个传感器和驱动源协同配合,生产成本较低,具有良好的响应效率和动作精确度。(The invention discloses a yarn clamping device suitable for a computerized flat knitting machine, which comprises an opening and closing yarn clamping piece, a transmission piece, a cam and an elastic piece, wherein the opening and closing yarn clamping piece is connected with the transmission piece, the opening and closing of the opening and closing yarn clamping piece is controlled by the repeated motion of the transmission piece in the opening and closing direction, the cam is connected with a rotary driving device, the cam is contacted with the transmission piece and enables the transmission piece to generate displacement through rotation, the elastic piece is connected with the transmission piece and enables the transmission piece to generate displacement through contraction, the contraction direction of the elastic piece is opposite to the pushing direction of the cam, the pushing force of the cam is greater than the elastic force of the elastic piece, the cam pushes the opening and closing yarn clamping piece to expand through the transmission piece, the elastic piece pulls the opening and closing yarn clamping piece to fold through the transmission piece, the cam and the elastic piece are mutually matched to complete the opening and closing of, the production cost is lower, and the response efficiency and the action accuracy are good.)

1. The yarn clamping device is characterized by comprising an opening and closing yarn clamping piece, a transmission piece, a cam and an elastic piece, wherein the opening and closing yarn clamping piece is connected with the transmission piece, the opening and closing of the opening and closing yarn clamping piece is controlled by the repeated motion of the transmission piece in the opening and closing direction, the cam is connected with a rotary driving device, the cam is in contact with the transmission piece and enables the transmission piece to generate displacement through rotation, the elastic piece is connected with the transmission piece and enables the transmission piece to generate displacement through contraction, the contraction direction of the elastic piece is opposite to the pushing direction of the cam, the pushing force of the cam is larger than the elastic force of the elastic piece, the cam pushes the opening and closing yarn clamping piece to open through the transmission piece, and the elastic piece pulls the opening and closing yarn clamping piece to close through the transmission piece.

2. The yarn clamp device suitable for use in a computerized flat knitting machine according to claim 1, wherein said cam comprises a bearing portion connected to said rotary drive means and a disk portion of varying diameter, said disk portion being comma-shaped.

3. The yarn clamping device suitable for the computerized flat knitting machine according to claim 1, comprising a fixed seat, wherein the opening and closing yarn clamping piece comprises two sets of clamping components which are oppositely arranged, each set of clamping components comprises at least one yarn clamping block and at least one connecting arm, the yarn clamping blocks positioned on the same side are rotatably connected with the connecting arm, the connecting arm is fixed on the fixed seat, and the yarn clamping blocks are rotatably connected with the transmission piece.

4. The yarn clamping device suitable for the computerized flat knitting machine according to claim 3, wherein all the yarn clamping blocks are provided with an overlapping area in the vertical direction, the overlapping area and the transmission member are provided with through holes at the same position in the vertical direction, and shaft bolts penetrate through all the through holes to form the rotary connection between the transmission member and the yarn clamping blocks.

5. The yarn clamping device for the computerized flat knitting machine according to claim 4, wherein the yarn clamping block is a triangular piece, three tip areas are respectively provided as a first tip portion, a second tip portion and a third tip portion, the first tip portion extends along the surface of the piece to form a protruding block, the protruding block forms a yarn clamping acute angle with an adjacent edge, the second tip portion is provided with a through hole for the shaft bolt to pass through, and the third tip portion is provided with a rotating through hole.

6. The yarn clamping device suitable for the computerized flat knitting machine according to claim 3, wherein one of the two sets of clamping components is provided with two first yarn clamping blocks and a first connecting arm, the two first yarn clamping blocks are respectively and rotatably connected to the upper side and the lower side of the first connecting arm, the other set is provided with a second yarn clamping block and a second connecting arm, and when the opening and closing yarn clamping member is folded, the second yarn clamping block is inserted between the two first yarn clamping blocks.

7. The yarn clamping device suitable for the computerized flat knitting machine according to claim 3, wherein the fixing seat comprises a fixing plate, a fixing frame is arranged on a first plate surface of the fixing plate, the fixing frame is provided with a containing hole for containing the elastic member, the containing hole is larger than the elastic member, one end of the elastic member is fixed on the fixing frame, and the other end of the elastic member is fixed on the transmission member.

8. The yarn clamping device for the computerized flat knitting machine according to claim 7, wherein two sides of the receiving hole are provided with limiting ribs along the length direction, the transmission member is disposed between the two limiting ribs, and the limiting ribs limit the moving direction of the transmission member.

9. The yarn clamping device suitable for the computerized flat knitting machine according to claim 7, wherein the transmission member is provided with at least two limiting holes, the limiting holes are elongated second-order through holes, and the limiting holes are distributed on two sides of the accommodating hole and are staggered.

10. The yarn clamping device suitable for the computerized flat knitting machine according to claim 7, wherein the rotary driving device is mounted on the second plate surface of the fixing plate, the rotary driving device is a driving motor, an output end of the driving motor penetrates through the fixing plate and is exposed to the first plate surface, and the cam is mounted on an output end of the driving motor.

Technical Field

The invention relates to the technical field of accessories of computerized flat knitting machines, in particular to a yarn clamping device suitable for a computerized flat knitting machine.

Background

The computerized flat knitting machine is a double-needle bed weft knitting machine, which is a main knitting apparatus for knitting wool and cashmere sweater products. In the process of knitting a knitting needle fabric, a yarn nozzle of a computerized flat knitting machine needs to repeatedly pull yarns to a yarn shearing station for shearing, the yarn shearing station generally comprises a scissors device and a yarn clamping device, and the conventional yarn clamping device is complex in structure, high in manufacturing cost and unstable in yarn clamping.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a yarn clamping device suitable for a computerized flat knitting machine.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides a press from both sides yarn device suitable for computerized flat knitting machine, is including the clamping yarn piece that opens and shuts, driving medium, cam and elastic component, the clamping yarn piece that opens and shuts is connected the driving medium, the opening and shutting of the clamping yarn piece that opens and shuts by the driving medium is at the ascending repetitive motion control of the side that opens and shuts, the cam is connected with rotary drive device, the cam contact the driving medium makes through rotating the driving medium produces the displacement, the elastic component is connected the driving medium makes through the shrink the driving medium produces the displacement, the shrink direction of elastic component with the promotion opposite direction of cam, the motive force of cam is greater than the elasticity of elastic component, the cam passes through the driving medium promotes the clamping yarn piece that opens and shuts opens and opens, the elastic component passes through the driving medium pulling the clamping yarn piece that opens and shuts is closed.

The cam includes a bearing portion connected to the rotary drive device and a disk portion of varying diameter, the disk portion being comma-shaped.

The yarn clamping device comprises a fixed seat, the opening and closing yarn clamping piece comprises two sets of clamping components which are oppositely arranged, each set of clamping components comprises at least one yarn clamping block and at least one connecting arm, the yarn clamping block and the connecting arm are located on the same side and are rotatably connected, the connecting arm is fixed on the fixed seat, and the yarn clamping block is rotatably connected with the transmission piece.

All the yarn clamping blocks are provided with overlapping areas in the vertical direction, the overlapping areas and the transmission piece are provided with through holes in the same position in the vertical direction, and shaft position bolts penetrate through all the through holes to form rotary connection between the transmission piece and the yarn clamping blocks.

The yarn clamping block is a triangular sheet, three tip areas are respectively set as a first tip portion, a second tip portion and a third tip portion, the first tip portion extends along the sheet surface to form a protruding block, the protruding block and an adjacent edge form a yarn clamping acute angle, the second tip portion is provided with a through hole for the shaft bolt to pass through, and the third tip portion is provided with a rotating through hole.

One of the two groups of clamping components is provided with two first yarn clamping blocks and a first connecting arm, the two first yarn clamping blocks are respectively and rotatably connected to the upper side and the lower side of the first connecting arm, the other group of clamping components is provided with a second yarn clamping block and a second connecting arm, and when the opening and closing yarn clamping piece is folded, the second yarn clamping block is inserted between the two first yarn clamping blocks.

The fixing base is including the fixed plate, the first face of fixed plate is provided with the mount, the mount is provided with and is used for holding the accommodation hole of elastic component, the accommodation hole is greater than the elastic component, the one end of elastic component is fixed in the mount, the other end is fixed in the driving medium.

The transmission piece is arranged between the two limiting convex strips, and the limiting convex strips limit the moving direction of the transmission piece.

The transmission part is provided with at least two limiting holes, the limiting holes are strip-shaped second-order through holes, and the limiting holes are distributed on two sides of the accommodating hole and are staggered.

The second face installation of fixed plate rotation drive device, rotation drive device is driving motor, driving motor's output pierces through the fixed plate exposes in first face, the cam install in driving motor's output.

The invention has the beneficial effects that: the yarn clamping device has the advantages of simple and compact structure, small volume, easiness in manufacturing, no need of designing a plurality of sensors to be matched with a driving source in a cooperation mode, low production cost and good response efficiency and action accuracy.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic perspective view of the opening and closing yarn clamp of the present invention;

fig. 3 is an exploded schematic view of the present invention.

Detailed Description

In the description of the present invention, it is to be understood that the terms "length", "width", "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 illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" or "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 to 3, a yarn clamping device suitable for a computerized flat knitting machine comprises an opening and closing yarn clamping piece 2, a transmission piece 1, a cam 6 and an elastic piece 7, wherein the opening and closing yarn clamping piece 2 is connected with the transmission piece 1, the opening and closing of the opening and closing yarn clamping piece 2 is controlled by the repeated movement of the transmission piece 1 in the opening and closing direction, the cam 6 is connected with a rotation driving device 5, the cam 6 contacts the transmission piece 1 and enables the transmission piece 1 to generate displacement through rotation, the elastic piece 7 is connected with the transmission piece 1 and enables the transmission piece 1 to generate displacement through contraction, the contraction direction of the elastic piece 7 is opposite to the pushing direction of the cam 6, and the pushing force of the cam 6 is greater than the elastic force of the elastic piece 7.

The working flow of this embodiment is: the yarn mouth of the flat knitting machine draws the yarn to the position of the opening and closing yarn clamping piece 2, the rotary driving device 5 receives a command from the control system to start rotating, the cam 6 pushes the opening and closing yarn clamping piece 2 to open through the transmission piece 1, the salient angle of the cam 6 rotates through the transmission piece 1, and the elastic piece 7 pulls the opening and closing yarn clamping piece 2 to close through the transmission piece 1 to finish yarn clamping action.

The transmission part 1 controls the opening and closing of the opening and closing yarn clamping piece 2 to be short in stroke, compared with other push-pull mechanisms, the cam 6 and the elastic piece 7 are adopted to be matched with each other to complete the opening and closing of the opening and closing yarn clamping piece 2, the yarn clamping device is simple and compact in structure, small in size, easy to manufacture, free of design of cooperative matching of a plurality of sensors and driving sources, low in production cost and good in response efficiency and action accuracy.

The cam 6 used in this embodiment comprises a bearing portion 602 connecting the rotary drive device 5 and a disc portion 601 of varying diameter, the disc portion 601 being comma-shaped. The arc-shaped edge of the comma structure is utilized to smoothly push the transmission piece 1 to a target position, the comma structure can ensure that the transmission piece 1 is immediately pulled back by the elastic piece 7 after passing through the tip, and the diameter sharply reduced after passing through the comma tip ensures that the cam 6 does not cause resistance to the retraction of the elastic piece 7, thereby ensuring high efficiency of yarn folding and clamping.

This embodiment is still including the fixing base, the clamp yarn spare 2 that opens and shuts is including the centre gripping subassembly of two sets of relative settings, each group the centre gripping subassembly includes that at least one presss from both sides yarn piece and at least one connects even arm, is located with one side press from both sides yarn piece and linking arm and rotate to be connected, the linking arm is fixed in the fixing base, press from both sides yarn piece and rotate to be connected driving medium 1, the displacement control of driving medium 1 sets up relatively press from both sides opening and shutting of yarn piece.

In this embodiment, all the yarn clamping blocks are provided with an overlapping area in the vertical direction, the overlapping area and the transmission member 1 are provided with through holes at the same position in the vertical direction, and the shaft position bolt 202 penetrates through all the through holes to form the rotational connection between the transmission member 1 and the yarn clamping blocks, so that the yarn clamping blocks do not need to be installed respectively when the transmission member 1 is assembled, and the opening and closing actions are controlled more accurately.

In this embodiment, the yarn clamping block is a triangular sheet, three tip regions are respectively provided as a first tip portion, a second tip portion and a third tip portion, the first tip portion extends along a surface of the sheet to protrude a projection 205, the projection 205 and an adjacent edge form an acute yarn clamping angle, the second tip portion is provided with a through hole for the shaft bolt 202 to pass through, and the third tip portion is provided with a rotation through hole 203, and the rotation through hole 203 is used for forming a rotation connection with the connecting arm.

In this embodiment, one of the two clamping assemblies is provided with two first yarn clamping blocks 204 and one first connecting arm 201, the two first yarn clamping blocks 204 are respectively rotatably connected to the upper side and the lower side of the first connecting arm 201, the other clamping assembly is provided with one second yarn clamping block 206 and one second connecting arm 207, and when the opening and closing yarn clamping piece 2 is folded, the second yarn clamping block 206 is inserted between the two first yarn clamping blocks 204, so that the yarn clamping stability is ensured.

The fixing base is including fixed plate 4, the first face of fixed plate 4 is provided with mount 3, mount 3 is provided with and is used for holding the accommodation hole 301 of elastic component 7, accommodation hole 301 slightly is greater than elastic component 7 (the elastic component of this embodiment is the torsional spring), the one end of elastic component 7 is fixed in mount 3, the other end is fixed in driving medium 1. The receiving hole 301 is designed such that the elastic member 7 does not contact the plate surface of the fixing plate 4 either when retracted or extended, thereby preventing resistance from being generated.

Two sides of the accommodating hole 301 are provided with limiting convex strips 302 along the length direction, the transmission piece 1 is arranged between the two limiting convex strips 302, and the limiting convex strips 302 limit the moving direction of the transmission piece 1. The driving member 1 of the present embodiment is a rectangular plate.

The transmission part 1 is provided with at least two limiting holes 101, specifically speaking, the limiting holes 101 are long-strip-shaped second-order through holes, the fixing frame 3 is provided with fixing holes corresponding to the positions of the limiting holes 101, screw rods of screws penetrate through the limiting holes 101 to be fixed in the fixing holes, nuts are clamped in the stepped structures of the limiting holes 101, the long-strip-shaped holes are designed to further accurately limit the stroke of the transmission part 1, and the stepped holes are designed to ensure that the transmission part 1 cannot be separated from the fixing frame 3 and is always located at a target height and contacted with the cam 6.

In this embodiment, the two limiting holes 101 are provided, and the two limiting holes 101 are distributed on two sides of the accommodating hole 301 and are staggered, so that vibration in the operation process is reduced, the movement of the transmission member 1 is more stable, and deformation of the transmission member 1 caused by long-term vibration and impact can be reduced to a certain extent.

The second surface of the fixing plate 4 is provided with the rotation driving device 5, the rotation driving device 5 of the embodiment is a driving motor, an output end of the driving motor penetrates through the fixing plate 4 and is exposed to the first surface, and the cam 6 is arranged at an output end of the driving motor.

The above embodiments do not limit the scope of the present invention, and those skilled in the art can make equivalent modifications and variations without departing from the overall concept of the present invention.