Traction mechanism

Abstract

The utility model provides a traction mechanism, control rods in the traction mechanism comprise a first control rod and a second control rod, and traction rakes comprise a plurality of first traction rakes which are transversely supported on the first control rod in parallel and a plurality of second traction rakes which are transversely supported on the second control rod in parallel. The first traction rakes and the second traction rakes are alternately arranged according to the sequence of one traction rake, the two transversely adjacent traction rakes are supported on different control rods, and the two driving elements alternately move upwards and downwards to drive the supported first control rods and the supported second control rods to alternately move upwards and downwards. The two transversely adjacent traction rakes are respectively in a traction state and a non-traction state, so that the existing basic traction width is separated very small, the basic physical width of one traction hook can be achieved, and the traction device is particularly suitable for the traction requirements of different knitting tissues with fine density.

Description

Technical Field

[0001] This invention relates to the field of horizontal knitting machine technology, and more particularly to a tensioning mechanism. Background Technology

[0002] When using a fully-formed horizontal knitting machine for garment knitting, the process of knitting sheet-like fabrics and then sewing them together can be eliminated. This demonstrates a significant cost advantage for the knitting industry, which is currently facing labor shortages and high labor costs, thus leading to the vigorous development of this equipment.

[0003] Currently, in fully-formed horizontal knitting, the overall pulling of the fabric is accomplished by several horizontally arranged pulling mechanisms. The existing pulling mechanism has a control rod that is driven upward by a motor. Several pulling rakes are supported in parallel on the control rod. These pulling rakes simultaneously pull the woven fabric to form the basic pulling width.

[0004] In the process of fully-knitted garments, different local knitting sections often exist within a basic tension width, requiring different tension forces to be applied to different locations. For example, using three parallel-supported tension rakes with a 0.5-inch spacing to pull the shoulder knit, the basic tension width is 1.5 inches. When the local knitting width of the shoulder is much smaller than 1.5 inches, the existing tension mechanism would apply tension force to the entire shoulder fabric. If the tension force is increased, the unknitted parts will be damaged; if the tension force is decreased, problems such as head needles or garment pieces floating at the bobbin opening may occur due to insufficient tension in the local knitting or needle-adding sections. Of course, the tension width can be reduced by decreasing the number of tension rakes supported on the control rod, but the control rod requires a motor drive. Reducing the number of tension rakes on the control rod will inevitably increase the number of motors, increasing costs. However, the bigger problem is that the basic physical width required by the motor is much larger than the width of the tension rakes. Therefore, even if the number of tension rakes on the control rod is reduced, it is difficult to meet the tension requirements of different local knitting sections in fine-density knitting. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention proposes a traction mechanism.

[0006] The technical solution of the present invention is as follows:

[0007] A pulling mechanism for use on a horizontal knitting machine includes a fixed base 5, a swing arm 7 hinged to the fixed base, a pulling rake 1 with a rotatable pulling hook 11 and guided by a guide member that moves relative to a guide groove via a pivot pin, a control rod 2 supporting the pulling rake, a drive element 3 that moves up and down and supports the control rod, a tension spring 8 connecting the pulling rake and the swing arm 7 at both ends respectively, and a cover plate 6 covering the outside of the fixed base 5 and exposing the pulling hook on the pulling rake 1. When the drive element moves upward, the pulling rake is driven upward by the control rod, resulting in a non-pulling posture on the knitted fabric; when the drive element moves downward, the pulling rake follows the control mechanism under its own weight and the tension spring force. The rod moves downward, putting the woven fabric in a pulling posture. The control rod 2 includes a first control rod 2A and a second control rod 2B. The pulling rake 1 includes several first pulling rakes 1A supported horizontally on the first control rod 2A and several second pulling rakes 1B supported horizontally on the second control rod 2B. The first pulling rakes 1A and the second pulling rakes 1B are arranged alternately in a sequence of one of each, so that two horizontally adjacent pulling rakes are supported on different control rods 2. The two drive elements 3 support one control rod respectively and move up and down alternately, so that two horizontally adjacent pulling rakes are alternately in a pulling state and a non-pulling state.

[0008] Furthermore, the driving element is a nut 32, and the pulling mechanism also includes a motor and a screw 33 mounted on the motor shaft. The nut 32 is driven by the screw 33 to move up and down.

[0009] Furthermore, the nut is provided with an upward-facing driving surface 321, so that when the nut 32 moves upward, the driving surface pushes the control rod upward.

[0010] Furthermore, the nut 32 is provided with symmetrically arranged and downward-facing adjustment surfaces 322, so that the rocker arm 7 is pushed downward by the adjustment surfaces when the nut 32 moves down, causing the tension spring connected to the rocker arm 7 to extend.

[0011] Furthermore, both the first control lever 2A and the second control lever 2B have plate-shaped bodies, with rectangular grooves 22 on the bodies and a receiving surface 23 on one side of the body for being supported by a nut and facing downward.

[0012] Furthermore, the upper ends of the bodies of the first control rod 2A and the second control rod 2B are provided with several parallel actuating parts 21 for supporting the pulling rake 1. The upper end of each actuating part 21 is bent vertically to one side of the body, the bending length is not greater than the thickness of the body, and the spacing between two adjacent actuating parts is greater than the width of the actuating part. The lower end of the body of the control rod is provided with a rod-shaped guide part 24.

[0013] Furthermore, the fixed base 5 includes a first guide groove 56 located on top for placing the pull rake, the number of which is the same as the total number of the first pull rake and the second pull rake; a mounting cavity 51 located below the first guide groove for placing the control rod; two parallel motor mount cavities 53 located below the mounting cavity 51 for placing the motor; two parallel screw cavities 52 located inside the bottom surface of the vertical cavity of the mounting cavity 51 and communicating with the two motor mount cavities 53 respectively and located above the motor mount cavities 53 for placing the screw; and two parallel hinge cavities 59 located inside the bottom surface of the vertical cavity of the screw cavity 52 for hinged arm.

[0014] Furthermore, a pressure plate 4 is provided, which is disposed on the outer side of the vertical cavity bottom surface 511 of the mounting cavity 51. The first control rod 2A and the second control rod 2B are slidably disposed between the pressure plate 4 and the vertical cavity bottom surface 511 of the mounting cavity with the vertical bends of the upper ends of the touch parts facing each other, the opposite body sides fitting together, and the rectangular sliding grooves sharing the same center line C. The other side of the first control rod and the second control rod body respectively fits the inner side of the pressure plate 4 and the vertical cavity bottom surface 511 of the mounting cavity.

[0015] Furthermore, the mounting cavity of the fixed base 5 is provided with a first positioning block 54 at the upper and lower positions of the vertical cavity bottom surface 511 symmetrical center, which is adapted to the width of the rectangular sliding groove 22 on the control rod and a second guide groove 57 at the upper and lower positions, which is adapted to the width of the guide part 24 on the control rod 2. The rectangular sliding groove 22 and the guide part 24 on the first control rod 2A and the second control rod 2B are respectively inserted into the first positioning block 54 and the second guide groove 57. The first control rod 2A and the second control rod 2B move up and down under the guidance of the first positioning block 54 and the second guide groove 57.

[0016] Furthermore, the mounting cavity 51 of the mounting cavity 51 of the fixed base 5 is provided with positioning surfaces 58 for positioning the pressure plate 4 in the inner and outer directions and second positioning blocks 55 for positioning in the up and down and left and right directions on both sides; the left and right sides of the pressure plate 4 are provided with positioning grooves 41 that are adapted to the second positioning blocks 55 on the fixed base, and the center position is provided with a clearance notch 42 for the first positioning block 54 to pass through. The pressure plate is positioned and installed on the fixed base 5 by the inner side of the pressure plate conforming to the positioning surface 58 and the positioning groove 41 fitting the second positioning block 55.

[0017] Furthermore, the swing arm 7 includes a hinge side 71, a swing side 72 connected to the tension spring, and two side sides 73 connecting the hinge side and the swing side. The hinge side is hinged to the hinge cavity 59, so that the swing arm 7 is below the pressure plate, the swing side is in the mounting cavity, and the two side sides are in a position that can be touched when the nut adjustment surface moves down. The lower end of the pressure plate forms a limit on the swing amplitude of the swing arm 7.

[0018] Furthermore, both the first and second pulling rakes have guide handles adapted to the width of the first guide groove on the fixed base and head 12 provided at the upper end of the guide handle and provided with the pulling hook; the guide groove in the guide member is provided on the guide handle of the pulling rake, and the guide groove includes an inclined straight groove and a straight groove arranged vertically, and the inclined straight groove is composed of a straight groove and an inclined groove connected to the lower end of the straight groove.

[0019] Furthermore, the guide pin 9 is set on the fixed seat, the two pins 9 are arranged parallel to each other and their diameters are adapted to the width of the guide groove. The guide handle 11 of the pulling rake is inserted into the first guide groove. The two pins 9 pass through the first guide groove on the fixed seat 5 and respectively pass through the inclined straight groove 112 and straight groove 111 on the guide handle inserted in the first guide groove. Both ends are fixed on the fixed seat 5. The pulling rake is guided by the guide to move up and down along the first guide groove or rotate relative to the lower pin 9.

[0020] Further, the cover plate 6 includes an upper cover plate 61 and a lower cover plate 62. The upper cover plate 61 covers the outer side of the upper part of the mounting cavity of the fixed seat 5, and the lower cover plate 62 covers the lower part of the mounting cavity 51 of the fixed seat 5 and the outer side of the motor seat cavity 53. The fixed seat is provided with an upper cover end face 5U and a lower cover end face 5D respectively corresponding to the upper cover plate and the lower cover plate covering position. The upper cover plate 61 is provided with a grid hole 611 that allows the pull hook to be exposed and is provided with an upper positioning end face 6U that is positioned by the upper cover end face. The lower cover plate is provided with a lower positioning end face 6D that is positioned by the lower cover end face and is provided with a second reinforcing rib 621 that is flush with the height of the lower positioning end face 6D. The outer side of the pressure plate 4 is provided with a reinforcing rib 43. The pressure plate 4 provided in the mounting cavity of the fixed seat makes the end face of the first reinforcing rib 43 flush with the upper cover end face 5U.

[0021] Furthermore, the inner surface of the motor housing cavity 53 is provided with heat dissipation slots 531 and protrusions 532 for motor positioning.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This invention provides a pulling mechanism. The mechanism includes a first control rod and a second control rod, and a pulling rake comprising several first pulling rakes and several second pulling rakes supported laterally on the first control rod and the second control rod, respectively. The first and second pulling rakes are arranged alternately in a one-to-one sequence, such that two laterally adjacent pulling rakes are supported on different control rods. Two driving elements alternately move up and down, driving the supported first and second control rods to alternately move up and down, thus placing two laterally adjacent pulling rakes in a pulling state and a non-pulling state respectively. This significantly reduces the existing basic pulling width, achieving a basic physical width equivalent to a single pulling hook, making it particularly suitable for the pulling requirements of fine-density weaves. Furthermore, the design of two control rods and two driving elements in this invention makes the up-and-down movement of the pulling rakes more balanced, preventing wear caused by eccentricity and uneven tension among the pulling hooks. Attached Figure Description

[0024] Figure 1 This is one of the schematic diagrams of the traction mechanism structure in an embodiment of the present invention. The tension spring 8 in the figure is represented by two parts, namely: Figure a is the front view of the traction mechanism, and Figure b is the cross-sectional view of the MM section of the traction mechanism shown in Figure a.

[0025] Figure 2 The second schematic diagram of the traction mechanism structure in this embodiment of the invention is as follows: Figure 1 The mounting bracket in diagram b is omitted;

[0026] Figure 3 This is a schematic diagram of the pull rake structure in an embodiment of the present invention;

[0027] Figure 4 This is a three-dimensional structural diagram of the nut in an embodiment of the present invention;

[0028] Figure 5 This is the case where the pulling mechanism of the present invention is in the lowest position when the pulling rake is in the lowest position;

[0029] Figure 6 This describes the situation where the pulling mechanism of this embodiment of the invention moves upward and the shaft pin enters the inclined groove;

[0030] Figure 7 This is the case where the pulling mechanism of the present invention is in the highest position when the pulling rake is in the highest position;

[0031] Figure 8 Figure 1 is a schematic diagram of the structure of the first control lever in an embodiment of the present invention, wherein: Figure 2a is a front view of the first control lever, and Figure 3b is a cross-sectional view of the first control lever shown in Figure 2a along section AA.

[0032] Figure 9This is a schematic diagram of the structure of the second control lever in an embodiment of the present invention, wherein: Figure a is a front view of the second control lever, and Figure b is a cross-sectional view of the BB section of the first control lever shown in Figure a;

[0033] Figure 10 This is a three-dimensional structural diagram of the swing arm in an embodiment of the present invention;

[0034] Figure 11 Figure 1 is a schematic diagram of the structure of the fixing seat in an embodiment of the present invention, wherein: Figure 2a is a front view of the fixing seat, and Figure 3b is a cross-sectional view of the NN section of the fixing seat shown in Figure 2a;

[0035] Figure 12 This is a three-dimensional structural diagram of the fixing base in an embodiment of the present invention;

[0036] Figure 13 Figure a is a schematic diagram of the structure of the pressure plate in an embodiment of the present invention, wherein: Figure a is a front view of the pressure plate, and Figure b is a symmetrical center sectional view of the pressure plate shown in Figure a;

[0037] Figure 14 This is a schematic diagram of the positional relationship between the first positioning block and the two rectangular sliding grooves on the two control rods and the clearance notch on the pressure plate in an embodiment of the present invention, wherein: Figure a shows the first positioning block not inserted into the two rectangular sliding grooves and the notch, and Figure b shows the first positioning block inserted into the two rectangular sliding grooves and the notch;

[0038] Figure 15 Figure 1 is a schematic diagram of the cover plate in an embodiment of the present invention, wherein: Figure 2a is a front view of the cover plate, and Figure 3b is a symmetrical sectional view of the cover plate shown in Figure 2a.

[0039] In the diagram, 1-pulling rake; 1A-first pulling rake; 1B-second pulling rake; 11-guide handle; 111-straight groove; 112-slanted straight groove; 113-tension spring hanging hole; 12-head; 2-control lever; 2A-first control lever; 2B-second control lever; 21-touch part; 22-rectangular slide; 23-receiving surface; 24-guide part; 3-drive element; 31-motor; 33-screw; 32-nut; 4-pressure plate; 41-positioning groove; 42-clearance notch; 43-first reinforcing rib; 5-fixed seat; 51-installation cavity; 511-vertical cavity bottom 52-Screw cavity; 53-Motor seat cavity; 531-Heat dissipation slot hole; 532-Limiting protrusion; 54-First positioning block; 55-Second positioning block; 56-First guide groove; 57-Second guide groove; 5U-Upper cover end face; 5D-Lower cover end face; 61-Upper cover plate; 611-Grid hole; 62-Lower cover plate; 6U-Upper positioning end face; 6D-Lower positioning end face; 621-Second reinforcing rib; 7-Swing arm; 71-Hinged edge; 72-Swing edge; 721-Tension spring hook hole; 73-Side edge; 731-Adjusting protrusion; 8-Tension spring; 9-Shaft pin. Detailed Implementation

[0040] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments.

[0041] The tensioning mechanism is arranged on both sides of the knitted fabric below the needle plate of the horizontal knitting machine, such as... Figure 1 and Figure 2 As shown, the pulling mechanism of the present invention mainly consists of a pulling rake 1, a control rod 2, a driving element 3, a fixed base 5, a cover plate, a swing arm 7, a tension spring 8, and a guide member. The guide member is composed of a shaft pin 9 and a guide groove that move relative to each other. In this embodiment, the driving element 3 is a nut 32.

[0042] Figure 3 As shown, the pull rake 1 has a guide handle 11 and a head 12 located at the upper end of the guide handle. The head 12 is provided with a disclosed rotatable pull hook (see disclosed patent 202011120222.9), so that when moving upward, the pull hook is rotated downward by the action of the woven fabric, preventing it from hooking the woven fabric; when moving downward, the pull hook is rotated upward by the action of the eccentric structure, and the extended state is kept stable by the limiting structure, so that it hooks the woven fabric. A tension spring hanging hole 113 is provided below the head 12 for connecting a tension spring 8. The guide handle 11 is provided with a guide groove in the guide member, which includes an inclined straight groove 112 and a straight groove 111 arranged vertically. The inclined straight groove 112 is composed of a straight groove and an inclined groove connected to the lower end of the straight groove; the shaft pin 9 in the guide member is provided on the fixed seat 5. The two shaft pins 9 are arranged vertically parallel and placed in the straight groove and the inclined straight groove respectively. The movement of the pull rake 1 is guided by the movement of the guide groove relative to the shaft pin 9.

[0043] The aforementioned pull rake 1 includes a first pull rake 1A and a second pull rake 1B with identical structures, and the control rod 2 includes a first control rod 2A and a second control rod 2B. Several first pull rakes 1A and several second pull rakes 1B are respectively supported on the first control rod 2A and the second control rod 2B. The first and second pull rakes are arranged alternately in a sequence of one each (e.g., 1A, 1B, 1A, 1B... or 1B, 1A, 1B, 1A...), forming a row of pull rakes arranged laterally. Two adjacent pull rakes 1A, 1B or 1B, 1A in this row are respectively supported on different control rods, and each control rod is supported on a corresponding nut 32 and is driven by the upward movement of the nut.

[0044] In this embodiment, the nut 32 is driven to move up and down by the screw 33 mounted on the shaft of the motor 31. Its specific three-dimensional structure can be found in [reference needed]. Figure 4The top surface of the nut 32 serves as an upward-facing driving surface 321, so that when the nut 32 moves upward, it pushes the corresponding control rod upward through the driving surface 321. The two nuts 32A and 32B move upward and downward alternately, thereby alternately driving the first control rod 2A and the second control rod 2B upward, thus alternately pushing the first pulling rake 1A and the second pulling rake 1B upward. For example, Figures 1-2 The second pull rake 1B shown is moved to its highest position, while the first pull rake 1A is simultaneously at its lowest position. When the pull rake moves upward from its lowest position (e.g....) Figure 1-2 The position of the second pull rake 1B in the middle), is moved upward relative to the shaft pin 9 by the straight groove (including the straight groove in the straight groove 111 and the inclined straight groove 112) on the inner side of its guide handle, see Figure 5 The pull hook on the head is in the extended state and may touch the woven fabric, but due to the aforementioned rotatable pull hook, it will not snag the woven fabric when moving upwards. When the pull rake moves upwards close to its highest position, the shaft pin 9 in the inclined groove 112 above the guide handle enters the inclined groove from the straight groove, such as... Figure 6 The pull rake begins to retract downward relative to the lower pivot pin 9 until the pull rake moves to its highest position (e.g., Figure 1-2 The second pull rake 1B in the middle), forming a head retracted state, such as Figure 7 As nut 32 moves downward, pull rake 1 follows control lever 2 downward. The pin 9 in the inclined groove above its guide handle enters the straight groove from the inclined groove, causing the head to rotate outward and re-enter the extended state. As described above, the downward-moving pull hook rotates upward and firmly hooks the woven fabric, pulling it downward. To generate greater pulling force, the pull rake is connected to one end of tension spring 8. Therefore, as the pull rake moves downward, it pulls the woven fabric downward under the action of its own weight and the tension of the spring. Thus, the adjacent pulling rakes 1A and 1B are alternately driven to the highest position by nuts 32A and 32B through their respective supported control rods. They also move downwards as nuts 32A and 32B move downwards, and are pulled downwards by their own weight and the tension of the spring. This causes the two adjacent pulling rakes supported on different control rods to alternately be in a pulling state and a non-pulling state. If only one pulling hook is set horizontally on the head of the pulling rake, the pulling width can be divided into the minimum physical width, which greatly reduces the basic pulling width and is particularly suitable for the pulling needs of different fine-density weaves.

[0045] like Figure 8 , Figure 9 and Figure 14As shown, the control lever 2 has a plate-shaped body with a rectangular groove 22 on the body. One side of the body has a downward-facing receiving surface 23. Further, several actuating parts 21 extend from the upper end of the body. The number of actuating parts 21 is the same as the number of traction rakes supported, so that each actuating part 21 supports one traction rake. The upper end of each actuating part 21 is bent vertically to one side of the body, and the bending length is not greater than the thickness of the body. The spacing between two adjacent actuating parts is greater than the width of the actuating parts. The first control lever 2A and the second control lever 2B have the same structure.

[0046] The other end of the aforementioned tension spring 8 is connected to the swing arm 7, so that the length of the tension spring can be adjusted by the swing angle of the swing arm 7, thereby adjusting the tension of the tension spring. Figure 10 The swing arm 7 includes a hinge side 71, a swing side 72, and two sides 73 connecting the hinge side and the swing side and having an adjustment protrusion 731. The hinge side 71 has a hinge hole and is hinged to the fixed base 5 through the hinge hole. The swing side 72 has a tension spring hook hole 721. The lower end of the tension spring 8 is hooked in the tension spring hook hole, and the upper end is hooked in the tension spring hanging hole 113 on the pulling rake.

[0047] The swing angle of the swing arm 7 is further achieved by the action of the nut 32. In this embodiment, the nut 32 is also provided with symmetrically arranged and downward-facing adjustment surfaces 322 (see Figure 4 The screw is driven by the motor to rotate, causing the nut 32 to move down. The two adjusting surfaces 322 that move down push against the adjusting protrusion 731 on the side of the swing arm 7 to rotate downward, causing the tension spring 8 to extend and increase the pulling force. After adjustment, the swing arm 7 is fixed in this adjusted position.

[0048] like Figure 11 and Figure 12 As shown, the mounting base 5 includes several parallel first guide grooves 56, mounting cavities 51, motor housing cavities 53, screw cavities 52, and hinge cavities 59, which are described in detail below:

[0049] The first guide groove 56 is located above the inner cavity of the fixed base, and its number is the same as the total number of the first and second pulling rakes. The width of the guide handle of the first and second pulling rakes is adapted to the width of the first guide groove. The first and second pulling rakes, which are respectively supported on the first control rod and the second control rod, are inserted into the first guide groove one at a time through their respective guide handles. Two shaft pins 9 pass through all the first guide grooves 56 and pass through the straight groove and the oblique straight groove on each pulling rake, respectively. The two ends are connected to the fixed base, thereby allowing the pulling rakes to slide up and down and be rotatably connected to the fixed base.

[0050] The mounting cavity 51 is located below the first guide groove and is used to place the control rods 2A and 2B. In this embodiment, a first positioning block 54 adapted to the width of the rectangular slide groove 22 on the control rod and a second guide groove 57 adapted to the width of the guide part 24 on the control rod are respectively provided from top to bottom at the symmetrical center position of the vertical cavity bottom surface 511 of the mounting cavity. The first control rod 2A and the second control rod 2B are arranged in the mounting cavity 51 with the vertical bends of the upper end of the actuation part facing each other, the opposite body sides fitting together, and the rectangular slide grooves sharing the same center line C. The rectangular slide grooves 22 on the two control rods are embedded in the first positioning block 54, and the guide parts 24 on the two control rods are inserted into the second guide groove 57. When the two control rods are driven by the corresponding nuts, they will slide up and down guided by the first positioning block 54 and the second guide groove 57.

[0051] To constrain and guide the control rods in the inward and outward directions, this embodiment also includes a pressure plate 4. The pressure plate 4 is positioned on the outer side of the vertical cavity bottom surface 511 of the mounting cavity, forming a space between the vertical cavity bottom surface 511 and the pressure plate 4 for placing the two control rods with their bodies in contact. The other sides of the two control rods that are not in contact with each other are respectively in contact with the inner side of the pressure plate 4 and the vertical cavity bottom surface 511 of the mounting cavity. Therefore, when the two control rods move up and down, they are constrained and guided in the inward and outward directions by the vertical cavity bottom surface 511 of the mounting cavity and the pressure plate 4. Figure 13 The pressure plate 4 has a symmetrical structure, with a clearance notch 42 at its center to allow the first positioning block 54, which passes sequentially through the rectangular grooves on the first and second control rods from the inside out, to pass through the pressure plate. Figure 14 Positioning grooves 41 are provided on both symmetrical sides of the pressure plate 4, such as... Figure 11 and Figure 12 The vertical cavity bottom surface 511 of the fixed seat mounting cavity is provided with positioning surfaces 58 for positioning the pressure plate in the inner and outer directions and second positioning blocks 55 for positioning in the up and down and left and right directions. The pressure plate is positioned and installed on the fixed seat 5 by the inner side of the pressure plate conforming to the positioning surface 58 and the positioning groove 41 fitting into the second positioning block 55.

[0052] The lower end of pressure plate 4 is located on the path of swing arm 7 swinging around the hinge point, see [reference]. Figure 1 , 2 Therefore, the lower end of the pressure plate 4 can serve as a limiting structure for the swing angle of the swing arm 7, thereby adjusting the tension of the tension spring. For example, a rotatable screw is provided at the lower end of the pressure plate, and a crossbar parallel to the lower end of the pressure plate is screwed onto the screw. The crossbar moves up and down by rotating the screw, so that the lower end of the pressure plate 4 can be raised and lowered. Thus, the adjustable crossbar can limit the swing angle of the swing arm 7 and adjust the tension of the tension spring.

[0053] like Figure 11 and Figure 12As shown, two motor housing cavities 53 are arranged side-by-side below the mounting cavity to accommodate the motor body of the drive nut. Two screw cavities 52, each communicating with the two parallel motor housing cavities 53, are located above them to accommodate the screws 33 mounted on the motor shaft. The screw cavities 52 are situated on the inner side of the vertical bottom surface of the mounting cavity 51. To facilitate motor heat dissipation and positioning, the inner wall of the motor housing cavities 53 is provided with heat dissipation slots 531 and limiting protrusions 532. The limiting protrusions 532 limit the motor in the lateral direction and simultaneously create a gap between the motor and the motor housing cavity to facilitate motor heat dissipation.

[0054] Two parallel hinge cavities 59 are located on the inner side of the bottom surface of the vertical cavity of a corresponding screw cavity 52, and are used to hinge the swing arm 7. The hinge edge 71 in the swing arm 7 is located in the hinge cavity 59 and is hinged to the fixed seat through the hinge hole on it. The swing edge is located in the mounting cavity, and both sides are in the position that can be touched when the adjustment surface of the nut moves down.

[0055] like Figure 15 As shown, the cover plate in this embodiment includes an upper cover plate 61 and a lower cover plate 62. The upper cover plate 61 covers the outer side of the upper part of the mounting cavity 51 of the fixing seat 5, and the lower cover plate 62 covers the lower part of the mounting cavity 51 of the fixing seat 5 and the outer side of the motor seat cavity 53. The fixing seat is provided with an upper cover end face 5U and a lower cover end face 5D respectively corresponding to the upper cover plate and the lower cover plate covering position. The upper cover plate 61 is provided with a grid hole 611 that allows the pull hook to be exposed and is provided with an upper positioning end face 6U positioned by the upper cover end face. The lower cover plate is provided with a lower positioning end face 6D positioned by the lower cover end face and is provided with a second reinforcing rib 621 that is flush with the height of the lower positioning end face 6D. The outer side of the pressure plate 4 is provided with a first reinforcing rib 43. The pressure plate 4 provided in the mounting cavity of the fixing seat makes the end face of the first reinforcing rib 43 flush with the upper cover end face 5U.

[0056] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. For example, the driving element can also use a rack and pinion or other driving components. If a rack and pinion is used, it can move up and down by being driven by a gear connected to the motor shaft. As another example, the guide groove and the shaft pin in the guide component can be arranged in opposite directions, with the guide groove located on the wall of the first guide groove and the shaft pin located on both sides of the guide handle. Therefore, any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this invention should be included within the scope of protection of this invention.

Claims

1. A pulling mechanism for use on a horizontal knitting machine, comprising a fixed base (5), a swing arm (7) hinged to the fixed base, a pulling rake (1) having a rotatable pulling hook and guided by a guide member that moves relative to a guide groove, a control rod (2) supporting the pulling rake, a drive element (3) that moves up and down and supports the control rod, a tension spring (8) connecting the pulling rake and the swing arm (7) at both ends respectively, and a cover plate (6) covering the outside of the fixed base (5) and exposing the pulling hook on the pulling rake (1), wherein the pulling rake moves upward by the control rod when the drive element moves upward, and is in a non-pulling posture on the knitted fabric; the pulling rake moves downward with the control rod under its own weight and the tension spring force when the drive element moves downward, and is in a pulling posture on the knitted fabric, characterized in that: The control lever (2) includes a first control lever (2A) and a second control lever (2B). The pulling rake (1) includes several first pulling rakes (1A) supported laterally on the first control lever (2A) and several second pulling rakes (1B) supported laterally on the second control lever (2B). The first pulling rakes (1A) and the second pulling rakes (1B) are arranged alternately in a one-to-one order, so that two laterally adjacent pulling rakes are supported on different control levers (2). The two drive elements (3) support a control lever respectively and move up and down alternately, so that two laterally adjacent pulling rakes are alternately in a pulling state and a non-pulling state.

2. The traction mechanism according to claim 1, characterized in that, The driving element is a nut (32), and the pulling mechanism also includes a motor and a screw (33) mounted on the motor shaft. The nut (32) is driven by the screw (33) to move up and down.

3. The traction mechanism according to claim 2, characterized in that, The nut is provided with an upward-facing drive surface (321) to push the control rod upward as the nut (32) moves upward.

4. The traction mechanism according to claim 2, characterized in that: The nut (32) has a symmetrically arranged and downward-facing adjustment surface (322) so that the adjustment surface pushes the swing arm (7) to rotate downward by moving the nut (32) downward, so that the tension spring connected to the swing arm (7) is stretched.

5. The traction mechanism according to claim 3 or 4, characterized in that: Both the first control lever (2A) and the second control lever (2B) have plate-shaped bodies with rectangular grooves (22) and a receiving surface (23) on one side of the body for being supported by a nut and facing downward.

6. The traction mechanism according to claim 5, characterized in that, The upper ends of the first control rod (2A) and the second control rod (2B) are provided with several parallel actuating parts (21) for supporting the pulling rake (1). The upper end of each actuating part (21) is bent vertically to one side of the body, and the bending length is not greater than the thickness of the body. The spacing between two adjacent actuating parts is greater than the width of the actuating part. The lower end of the control rod is provided with a rod-shaped guide part (24).

7. The traction mechanism according to claim 6, characterized in that: The fixed base (5) includes a first guide groove (56) located on top for placing the pull rake and the number of such grooves is the same as the total number of the first and second pull rakes; a mounting cavity (51) located below the first guide groove for placing the control rod; two parallel motor mount cavities (53) located below the mounting cavity (51) for placing the motor; two parallel screw cavities (52) located on the inner side of the bottom surface of the vertical cavity of the mounting cavity (51) and communicating with the two motor mount cavities (53) respectively and located above the motor mount cavities (53) for placing the screw; and two parallel hinge cavities (59) located on the inner side of the bottom surface of the vertical cavity of the screw cavity (52) for hinged arm.

8. The traction mechanism according to claim 7, characterized in that: A pressure plate (4) is also provided. The pressure plate (4) is located on the outer side of the vertical cavity bottom surface (511) of the mounting cavity (51). The first control rod (2A) and the second control rod (2B) are slidably arranged between the pressure plate (4) and the vertical cavity bottom surface (511) of the mounting cavity with the vertical bends of the upper end of the touch part facing each other, the opposite body sides fitting together, and the rectangular sliding grooves sharing the same center line (C). The other side of the first control rod and the second control rod body respectively fits the inner side of the pressure plate (4) and the vertical cavity bottom surface (511) of the mounting cavity.

9. The traction mechanism according to claim 8, characterized in that: The mounting cavity of the fixed base (5) has a first positioning block (54) adapted to the width of the rectangular slide groove (22) on the control rod and a second guide groove (57) adapted to the width of the guide part (24) on the control rod (2) at the upper and lower positions of the vertical cavity bottom surface (511) of the mounting cavity. The rectangular slide groove (22) and guide part (24) on the first control rod (2A) and the second control rod (2B) are respectively inserted into the first positioning block (54) and the second guide groove (57). The first control rod (2A) and the second control rod (2B) move up and down under the guidance of the first positioning block (54) and the second guide groove (57).

10. The traction mechanism according to claim 9, characterized in that: The mounting cavity (51) of the fixed seat (5) has a positioning surface (58) on both sides of the vertical cavity bottom surface (511) for positioning the pressure plate (4) in the inner and outer directions, and a second positioning block (55) for positioning in the up and down and left and right directions; the left and right sides of the pressure plate (4) have positioning grooves (41) that are adapted to the second positioning block (55) on the fixed seat, and the center position has a clearance notch (42) for the first positioning block (54) to pass through. The pressure plate is positioned and installed on the fixed seat (5) by fitting the positioning surface (58) on the inner side and the positioning groove (41) fitting the second positioning block (55).

11. The traction mechanism according to claim 10, characterized in that: The swing arm (7) includes a hinge side (71), a swing side (72) that connects to the tension spring, and two sides (73) that connect the hinge side and the swing side. The hinge side is hinged to the hinge cavity (59), so that the swing arm (7) is below the pressure plate, the swing side is in the mounting cavity, and the two sides are in the position that can be touched when the nut adjustment surface moves down. The lower end of the pressure plate forms a limit on the swing amplitude of the swing arm (7).

12. The traction mechanism according to claim 7, characterized in that: The first and second pulling rakes each have a guide handle (11) adapted to the width of the first guide groove on the fixed base and a head (12) provided at the upper end of the guide handle and provided with the pulling hook; the guide groove in the guide member is provided on the guide handle of the pulling rake, and the guide groove includes an inclined straight groove and a straight groove arranged vertically, and the inclined straight groove is composed of a straight groove and an inclined groove connected to the lower end of the straight groove.

13. The traction mechanism according to claim 12, characterized in that: The guide pin (9) is set on the fixed seat. The two pins (9) are arranged parallel to each other and their diameters are adapted to the width of the guide groove. The guide handle (11) of the pull rake is inserted into the first guide groove. The two pins (9) pass through the first guide groove on the fixed seat (5) and respectively pass through the oblique straight groove (112) and straight groove (111) on the guide handle inserted in the first guide groove. Both ends are fixed on the fixed seat (5). The pull rake is guided by the guide to move up and down along the first guide groove or rotate relative to the lower pin (9).

14. The traction mechanism according to claim 9, characterized in that: The cover plate (6) includes an upper cover plate (61) and a lower cover plate (62). The upper cover plate (61) covers the outer side of the upper part of the mounting cavity of the fixed seat (5), and the lower cover plate (62) covers the lower part of the mounting cavity (51) and the outer side of the motor seat cavity (53) of the fixed seat (5). The fixed seat is provided with an upper cover end face (5U) and a lower cover end face (5D) respectively corresponding to the upper cover plate and the lower cover plate covering position. The upper cover plate (61) is provided with a grid hole (611) that allows the pull hook to be exposed and is provided with an upper positioning end face (6U) positioned by the upper cover end face. The lower cover plate is provided with a lower positioning end face (6D) positioned by the lower cover end face and is provided with a second reinforcing rib (621) that is flush with the height of the lower positioning end face (6D). The outer side of the pressure plate (4) is provided with a first reinforcing rib (43). The pressure plate (4) set in the mounting cavity of the fixed seat makes the end face of the first reinforcing rib (43) flush with the upper cover end face (5U).

15. The traction mechanism according to claim 7, characterized in that: The inner surface of the motor housing (53) is provided with heat dissipation slots (531) and protrusions (532) for motor positioning.

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