A yarn clamping device suitable for computer flat knitting machine

Abstract

The present invention discloses a yarn clamping device suitable for a computer flat knitting machine, comprising an opening and closing yarn clamping member, a transmission member, a cam and an elastic member, the opening and closing yarn clamping member is connected to the transmission member, the opening and closing of the opening and closing yarn clamping member is controlled by the repeated movement of the transmission member in the opening and closing direction, the cam is connected to a rotary driving device, the cam contacts the transmission member and causes the transmission member to be displaced by rotation, the elastic member is connected to the transmission member and causes the transmission member to be displaced by contraction, the contraction direction of the elastic member is opposite to the pushing direction of the cam, the pushing force of the cam is greater than the elastic force of the elastic member, the cam pushes the opening and closing yarn clamping member to open through the transmission member, and the elastic member pulls the opening and closing yarn clamping member to close through the transmission member, the cam and the elastic member cooperate with each other to complete the opening and closing of the opening and closing yarn clamping member, the present invention has a simple and compact structure, a small size, is easy to manufacture, does not need to design a plurality of sensors and drive sources for coordinated cooperation, has a low production cost, and has good response efficiency and action accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of computer flat knitting machine accessories, in particular to a yarn clamping device suitable for a computer flat knitting machine. Background Art

[0002] Computerized flat knitting machine is a double needle bed weft knitting machine, which is the main knitting machine for knitting wool and cashmere sweater products. In the process of knitting knitted fabrics, the yarn mouth of the computerized flat knitting machine needs to repeatedly pull the yarn to the yarn cutting station for cutting, and the yarn cutting station generally includes a scissor device and a yarn clamping device. The existing yarn clamping device has a complex structure, high cost, and unstable yarn clamping. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a yarn clamping device suitable for a computerized flat knitting machine.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A yarn clamping device suitable for a computer flat knitting machine comprises an opening and closing yarn clamping member, a transmission member, a cam and an elastic member, wherein the opening and closing yarn clamping member is connected to the transmission member, and the opening and closing of the opening and closing yarn clamping member is controlled by the repeated movement of the transmission member in the opening and closing direction, the cam is connected to a rotary drive device, the cam contacts the transmission member and causes the transmission member to be displaced by rotation, the elastic member is connected to the transmission member and causes the transmission member to be displaced by contraction, the contraction direction of the elastic member is opposite to the pushing direction of the cam, the pushing force of the cam is greater than the elastic force of the elastic member, the cam pushes the opening and closing yarn clamping member to open through the transmission member, and the elastic member pulls the opening and closing yarn clamping member to close through the transmission member.

[0006] The cam includes a support portion connected to the rotary drive device and a disc-shaped portion with a variable diameter, and the disc-shaped portion is in a comma shape.

[0007] The yarn clamping device includes a fixed seat, and the opening and closing yarn clamping member includes two groups of clamping components arranged oppositely, each group of the clamping components includes at least one yarn clamping block and at least one connecting arm, the yarn clamping block and the connecting arm located on the same side are rotatably connected, the connecting arm is fixed to the fixed seat, and the yarn clamping block is rotatably connected to the transmission member.

[0008] All the yarn clamping blocks are provided with overlapping areas in the vertical direction, and through holes are provided at the same position of the overlapping areas and the transmission member in the vertical direction, and axial bolts penetrate all the through holes to form a rotational connection between the transmission member and the yarn clamping blocks.

[0009] The yarn clamping block is a triangular sheet-like object, and the three tip areas are respectively set as the first tip, the second tip and the third tip. The first tip extends along the sheet surface to protrude a convex block, and the convex block forms a yarn clamping acute angle with the adjacent edge. The second tip is provided with a through hole for the axial bolt to pass through, and the third tip is provided with a rotating through hole.

[0010] One of the two groups of clamping components is configured as two first yarn clamping blocks and a first connecting arm, and the two first yarn clamping blocks are rotatably connected to the upper and lower sides of the first connecting arm respectively, and the other group is configured as 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.

[0011] The fixing seat includes a fixing plate, a fixing frame is provided on the first plate surface of the fixing plate, the fixing frame is provided with a receiving hole for receiving the elastic member, the receiving hole is larger than the elastic member, one end of the elastic member is fixed to the fixing frame, and the other end is fixed to the transmission member.

[0012] Limiting convex strips are arranged on both sides of the accommodating hole along the length direction, and the transmission member is arranged between the two limiting convex strips, and the limiting convex strips limit the moving direction of the transmission member.

[0013] The transmission member is provided with at least two limiting holes, and the limiting holes are long strip-shaped second-order through holes. The limiting holes are distributed on both sides of the accommodating hole and are staggered.

[0014] The rotary drive device is installed on the second plate surface of the fixed plate. The rotary drive device is a drive motor. The output end of the drive motor penetrates the fixed plate and is exposed to the first plate surface. The cam is installed on the output end of the drive motor.

[0015] The beneficial effects of the present invention are: the cam and the elastic part cooperate with each other to complete the opening and closing of the opening and closing yarn clamping part. The present invention has a simple and compact structure, a small size, and is easy to manufacture. It does not require the design of multiple sensors and drive sources for coordinated cooperation, has a low production cost, and has good response efficiency and movement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the opening and closing yarn clamping member of the present invention;

[0019] Figure 3 It is an exploded schematic diagram of the present invention. DETAILED DESCRIPTION

[0020] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0021] Reference Figures 1 to 3 A yarn clamping device suitable for a computer flat knitting machine includes an opening and closing yarn clamping member 2, a transmission member 1, a cam 6 and an elastic member 7. The opening and closing yarn clamping member 2 is connected to the transmission member 1, and the opening and closing of the opening and closing yarn clamping member 2 is controlled by the repeated movement of the transmission member 1 in the opening and closing direction. The cam 6 is connected to a rotary driving device 5. The cam 6 contacts the transmission member 1 and causes the transmission member 1 to be displaced by rotation. The elastic member 7 is connected to the transmission member 1 and causes the transmission member 1 to be displaced by contraction. The contraction direction of the elastic member 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 member 7.

[0022] The working process of this embodiment is as follows: the yarn mouth of the flat knitting machine pulls the yarn to the position of the opening and closing yarn clamping part 2 of this embodiment, the rotary drive device 5 receives the command from the control system and starts to rotate, the cam 6 pushes the opening and closing yarn clamping part 2 to open through the transmission part 1, the convex corner of the cam 6 rotates through the transmission part 1, and the elastic part 7 pulls the opening and closing yarn clamping part 2 to close through the transmission part 1 to complete the yarn clamping action.

[0023] The stroke required for the transmission member 1 to control the opening and closing of the opening and closing yarn clamping member 2 is very short. Compared with other push-pull mechanisms, the cam 6 and the elastic member 7 cooperate with each other to complete the opening and closing of the opening and closing yarn clamping member 2. This embodiment has a simple and compact structure, a small size, and is easy to manufacture. There is no need to design multiple sensors and drive sources for coordinated cooperation. The production cost is low and it has good response efficiency and movement accuracy.

[0024] The cam 6 used in this embodiment includes a support portion 602 connected to the rotary drive device 5 and a disc portion 601 with a variable diameter, and the disc portion 601 is in the shape of a comma. The arc edge of the comma structure is used to smoothly push the transmission member 1 to the target position, and the comma structure allows the transmission member 1 to be immediately pulled back by the elastic member 7 after passing the tip. The diameter that shrinks sharply after passing the comma tip makes the cam 6 not cause resistance to the retraction of the elastic member 7, thereby ensuring high efficiency of closing and clamping the yarn.

[0025] The present embodiment also includes a fixed seat, and the opening and closing yarn clamping member 2 includes two groups of clamping components arranged oppositely, each group of the clamping components includes at least one yarn clamping block and at least one connecting arm, the yarn clamping block and the connecting arm located on the same side are rotatably connected, the connecting arm is fixed to the fixed seat, the yarn clamping block is rotatably connected to the transmission member 1, and the displacement of the transmission member 1 controls the opening and closing of the relatively arranged yarn clamping blocks.

[0026] In this embodiment, all the yarn clamping blocks are provided with overlapping areas in the vertical direction, and through holes are provided in the overlapping areas and the transmission member 1 at the same position in the vertical direction. The axial bolt 202 passes through all the through holes to form a rotational connection between the transmission member 1 and the yarn clamping blocks, so that the yarn clamping blocks do not need to be installed separately when assembling the transmission member 1, and the opening and closing action can be controlled more accurately.

[0027] In this embodiment, the yarn clamping block is a triangular sheet-like object, and the three tip areas are respectively set as the first tip, the second tip and the third tip. The first tip extends along the sheet surface to protrude a protrusion 205, and the protrusion 205 forms an acute yarn clamping angle with the adjacent edge. The second tip is provided with a through hole for the axial bolt 202 to pass through, and the third tip is provided with a rotating through hole 203, and the rotating through hole 203 is used to form a rotating connection with the connecting arm.

[0028] In this embodiment, one of the two groups of clamping components is configured as two first yarn clamping blocks 204 and a first connecting arm 201, and the two first yarn clamping blocks 204 are rotatably connected to the upper and lower sides of the first connecting arm 201, respectively, and the other group is configured as a second yarn clamping block 206 and a second connecting arm 207. When the opening and closing yarn clamping component 2 is folded, the second yarn clamping block 206 is inserted between the two first yarn clamping blocks 204 to ensure the stability of the yarn clamping.

[0029] The fixing seat includes a fixing plate 4, a fixing frame 3 is provided on the first surface of the fixing plate 4, the fixing frame 3 is provided with a receiving hole 301 for receiving the elastic member 7, the receiving hole 301 is slightly larger than the elastic member 7 (the elastic member in this embodiment is a torsion spring), one end of the elastic member 7 is fixed to the fixing frame 3, and the other end is fixed to the transmission member 1. The design of the receiving hole 301 ensures that the elastic member 7 does not need to contact the surface of the fixing plate 4 whether it is retracted or extended, so as to avoid resistance.

[0030] The two sides of the receiving hole 301 are provided with limiting convex strips 302 along the length direction, and the transmission member 1 is arranged between the two limiting convex strips 302, and the limiting convex strips 302 limit the moving direction of the transmission member 1. The transmission member 1 of this embodiment is a rectangular plate.

[0031] The transmission member 1 is provided with at least two limiting holes 101. Specifically, the limiting hole 101 is a long second-step through hole. The fixing frame 3 is provided with a fixing hole at a position corresponding to the limiting hole 101. The screw rod of the screw passes through the limiting hole 101 and is fixed to the fixing hole. The nut is stuck in the stepped structure of the limiting hole 101. The long hole design is used to further accurately limit the stroke of the transmission member 1. The stepped hole design ensures that the transmission member 1 will not separate from the fixing frame 3 and is always located at the target height and in contact with the cam 6.

[0032] In this embodiment, two limiting holes 101 are provided, and the limiting holes 101 are distributed on both sides of the accommodating hole 301 and are staggered, so as to reduce the vibration during operation, make the movement of the transmission member 1 more stable, and also reduce the deformation of the transmission member 1 due to long-term vibration and impact to a certain extent.

[0033] The second plate surface of the fixed plate 4 is provided with the rotary drive device 5. The rotary drive device 5 of this embodiment is a drive motor. The output end of the drive motor penetrates the fixed plate 4 and is exposed to the first plate surface. The cam 6 is installed at the output end of the drive motor. The above implementations cannot limit the protection scope of the invention. The equal modifications and changes made by the professional and technical personnel without departing from the overall concept of the invention are still within the scope of the invention.

Claims

1. A yarn clamping device suitable for a computerized flat knitting machine, characterized in that The invention comprises an opening and closing yarn clamping member, a transmission member, a cam, an elastic member and a fixed seat, the opening and closing yarn clamping member is connected to the transmission member, the opening and closing of the opening and closing yarn clamping member is controlled by the repeated movement of the transmission member in the opening and closing direction, the cam is connected to a rotary driving device, the cam contacts the transmission member and causes the transmission member to be displaced by rotation, the elastic member is connected to the transmission member and causes the transmission member to be displaced by contraction, the contraction direction of the elastic member is opposite to the pushing direction of the cam, the pushing force of the cam is greater than the elastic force of the elastic member, the cam pushes the opening and closing yarn clamping member to open through the transmission member, and the elastic member pulls the opening and closing yarn clamping member to close through the transmission member; The opening and closing yarn clamping member comprises two groups of clamping assemblies arranged opposite to each other, each group of the clamping assemblies comprises at least one yarn clamping block and at least one connecting arm, the yarn clamping block and the connecting arm located on the same side are rotatably connected, the connecting arm is fixed to the fixing seat, and the yarn clamping block is rotatably connected to the transmission member; The yarn clamping block is a triangular sheet, and the three tip areas are respectively set as the first tip, the second tip and the third tip. The first tip extends along the sheet surface to protrude a convex block, and the convex block forms a yarn clamping acute angle with the adjacent edge. The second tip is provided with a through hole, and the through hole is provided with an axial bolt. The third tip is provided with a rotating through hole. The cam includes a support portion connected to the rotary drive device and a disc-shaped portion with a variable diameter, and the disc-shaped portion is in a comma shape.

2. The yarn clamping device suitable for a computerized flat knitting machine according to claim 1, characterized in that All the yarn clamping blocks are provided with overlapping areas in the vertical direction, and through holes are provided at the same position of the overlapping areas and the transmission member in the vertical direction, and axial bolts penetrate all the through holes to form a rotational connection between the transmission member and the yarn clamping blocks.

3. The yarn clamping device suitable for a computerized flat knitting machine according to claim 1, characterized in that One of the two groups of clamping components is set as two first yarn clamping blocks and a first connecting arm, and the two first yarn clamping blocks are rotatably connected to the upper and lower sides of the first connecting arm respectively, and the other group is set as a second yarn clamping block and a second connecting arm. When the opening and closing yarn clamping member is folded, the second yarn clamping block is inserted between the two first yarn clamping blocks.

4. The yarn clamping device suitable for a computerized flat knitting machine according to claim 1, characterized in that The fixing seat includes a fixing plate, a fixing frame is provided on the first plate surface of the fixing plate, the fixing frame is provided with a receiving hole for receiving the elastic member, the receiving hole is larger than the elastic member, one end of the elastic member is fixed to the fixing frame, and the other end is fixed to the transmission member.

5. The yarn clamping device suitable for a computerized flat knitting machine according to claim 4, characterized in that Limiting convex strips are arranged on both sides of the accommodating hole along the length direction, and the transmission member is arranged between the two limiting convex strips, and the limiting convex strips limit the moving direction of the transmission member.

6. The yarn clamping device suitable for a computerized flat knitting machine according to claim 4, characterized in that The transmission member is provided with at least two limiting holes, and the limiting holes are long strip-shaped second-order through holes. The limiting holes are distributed on both sides of the accommodating hole and are staggered.

7. The yarn clamping device suitable for a computerized flat knitting machine according to claim 4, characterized in that The rotary drive device is installed on the second plate surface of the fixed plate. The rotary drive device is a drive motor. The output end of the drive motor penetrates the fixed plate and is exposed to the first plate surface. The cam is installed on the output end of the drive motor.

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