Roller mechanism of flat knitting machine

Abstract

The invention discloses a roller mechanism of a flat knitting machine, which is composed of a pair of rollers in bilateral symmetry, each roller comprises a thicker lower roller and a thinner upper roller, the peripheries of the two rollers are provided with tensioned roller leather, the upper roller and the lower roller are wrapped in the roller leather, and when the lower roller rotates, the roller leather is driven to rotate; at least one end of the two lower rollers is provided with an opening and closing mechanism, the opening and closing mechanism comprises a pair of eccentric gears which are meshed with each other, and each eccentric gear is eccentrically arranged on one lower roller; the two eccentric gears are fixedly connected with coaxial limiting wheels respectively, and limiting plates fixed to the rack are arranged on the two sides of the limiting wheels and tangent to the limiting wheels. When the eccentric gear rotates, the circular motion of the lower roller on a smaller radius is reflected in a pair of rollers, namely the opening and closing motion of the rollers. The opening and closing movement of the device is rapid in action and free of hysteresis in the whole process.

Description

Technical Field

[0001] The present invention belongs to the technical field of knitting machinery, and in particular, relates to a flat knitting machine, in particular to a roller mechanism of the flat knitting machine. Background Art

[0002] When knitting, the knitting machine needs to pull the garment pieces being formed to provide downward tension, and this pulling is done by a roller mechanism. The roller mechanism in the prior art consists of a pair of rollers that are symmetrical on both sides, each roller includes a thicker lower roller roller and a thinner upper roller roller, and the outer periphery of the two roller rollers has a tensioned roller skin that wraps the upper and lower roller rollers. When the lower roller roller rotates, the roller skin is driven to rotate. Since the roller skin has a rough surface, when a pair of rollers rotate downward and inward at the same time, the two rollers close together, that is, they approach each other and generate tension on the garment pieces sandwiched between the two roller skins; when a pair of rollers rotate downward and outward at the same time, the two rollers open, that is, they are relatively far away and do not generate pressure on the garment pieces.

[0003] In actual production, it is necessary to intermittently stretch or not stretch the garment pieces according to the different patterns of the garment pieces being woven. The most commonly used mode is that the garment pieces are continuously and synchronously switched between being stretched and not being stretched. For this reason, the roller mechanism needs to be able to open or close quickly. The opening and closing action of the roller mechanism in the aforementioned prior art is not flexible enough, mainly because the rolling of the roller leather has a certain inertia, and the roller leather needs to overcome its inertia and reverse for a certain period of time to complete the opening action of the roller, so there is a lag. As a result, this roller mechanism cannot adapt to rapid opening and closing switching. Summary of the invention

[0004] The object of the present invention is to provide a roller mechanism of a knitting machine which can be opened and closed continuously and quickly.

[0005] The technical solution adopted by the present invention is as follows: the roller mechanism of the knitting machine is composed of a pair of rollers that are symmetrical on the left and right, each roller includes a thicker lower roller roller and a thinner upper roller roller, and the outer periphery of the two roller rollers is provided with a tensioned roller leather, which wraps the upper and lower roller rollers, and when the lower roller roller rotates, the roller leather is driven to rotate; it is characterized in that: at least one end of the two lower roller rollers is provided with an opening and closing mechanism, and the opening and closing mechanism includes a pair of eccentric gears that mesh with each other, each of which is eccentrically installed on a lower roller roller; the two eccentric gears are each fixedly connected with a coaxial limiting wheel, and there are limiting plates fixed on the frame on both sides of the limiting wheel, which are tangent to the limiting wheel.

[0006] Both ends of the two lower rollers are provided with opening and closing mechanisms, and the two sets of opening and closing mechanisms are symmetrical to each other, that is, one end of one lower roller is an active eccentric gear, and the other end of the other lower roller is an active eccentric gear, each driving a driven eccentric gear meshing therewith.

[0007] In the present invention, the lower roller is not located at the center of the eccentric gear, and the eccentric gear is restricted by the limiting wheel and the limiting plate, so its position in space is unchanged. Therefore, when the eccentric gear rotates, it will cause the lower roller to move in a circular motion on a smaller radius, which is reflected in a pair of rollers, that is, the opening and closing motion of the rollers.

[0008] Each roller in the present invention also includes at least one connecting block, and the lower roller roller and the upper roller roller are respectively rotatably connected to the connecting block; the connecting block has a protruding lower edge, which contacts with a limiting surface fixedly connected to the frame, thereby limiting the rotation of the connecting block relative to the frame.

[0009] Furthermore, the connecting block is arranged at the end of the roller. Or: The connecting block is arranged in the middle part of the roller, and a middle base fixedly connected to the frame is arranged below the connecting block, and the lower edge of the connecting block contacts the limiting surface on the middle base; a gap adjustment member is pivotally connected to the middle base, and the pivot point becomes a fulcrum, one end of which is fixedly connected to the connecting block, and the other end is an adjustable free end.

[0010] It also includes a long rod, which is arranged below the roller and parallel to the lower roller and coaxial with the pivot point of the gap adjusting member; one end is connected to the gap adjusting member, and the other end is connected to one end of the lower roller with a driven eccentric gear.

[0011] When the present invention is working, at one end of the roller, the active eccentric gear rotates under the drive of a power source (usually a motor), driving the lower roller roller fixed thereto to perform a small radius circular motion; at the same time, the driven eccentric gear meshing therewith is driven to rotate, driving the other lower roller roller fixed thereto to also perform a small radius circular motion. The other end of the roller is also a symmetrical action process; therefore, for each lower roller roller, there is an active eccentric gear at one end and a driven eccentric gear at the other end, thereby forming an opening and closing motion of a pair of rollers. When opening and closing is required, the rotation of the active eccentric gear causes the opening and closing motion through rigid transmission, and the entire process is rapid and without hysteresis.

[0012] The above-mentioned opening and closing action only acts on the lower roller, which may cause the lower roller to open and close while the upper roller does not change position. In the case where the lower edge of the connecting block cooperates with the limiting surface, the lower roller and the upper roller are combined into a whole by the connecting block, and the rotation of the connecting block is restricted and converted into translation, so that the upper roller can also move with the lower roller, so that one roller can be opened and closed as a whole.

[0013] The lower roller is relatively long, and not only has a small radius circular motion (partially converted into translational motion), but also rotates around its own axis to drive the upper roller. These forces need to be transmitted from one end of the lower roller to the other end, so the stress condition of the lower roller itself is also relatively complicated. After long-term use, the gap between the two lower rollers will change, and it is difficult to keep them parallel. For this reason, the present invention sets a gap adjustment member in the middle of the roller. The gap adjustment member is actually in the form of a lever to fine-tune the position of the middle of the lower roller so that the gap between the two lower rollers remains consistent. If the lower roller is regarded as a rod, this method is equivalent to reducing the original rod length to one-half, thereby improving its stress transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the present invention.

[0015] Figure 2 Yes Figure 1 This is a schematic diagram after the roller is removed.

[0016] Figure 3 It is a schematic diagram of an eccentric cam.

[0017] Figure 4 It is an exploded schematic diagram of the opening and closing mechanism.

[0018] Figure 5 is a schematic diagram of a clearance adjustment member.

[0019] The accompanying drawings are marked as follows: 1-roller mechanism; A1\A2\B1\B2-roller; 11-lower roller; 12-upper roller; 13-long rod; 2-driving mechanism; 20-first eccentric gear; 201-limiting wheel; 21-transmission shaft; 211-key; 22-driving shaft; 23-first gear, 24-second gear; 25-limiting plate; 26-swivel seat; 30-second eccentric gear; 301-limiting wheel; 31-transmission shaft; 311-prismatic head; 33-sprocket; 41-middle swivel seat; 42-middle base; 421-limiting plane; 422-axial hole; 43-connecting block; 431-axial hole; 432-arc notch; 44-blocking shaft; 45-gap adjusting member; 451-axial hole; 452-free end. DETAILED DESCRIPTION

[0020] See the attached drawings. The roller mechanism 1 of this embodiment includes roller A and roller B, which can be separated to allow fabric to pass through, or closed to provide pulling force to the fabric. Among them, roller A can be divided into two sections, A1 and A2, and roller B can be divided into two sections, B1 and B2. Each section of roller includes a thicker lower roller roller 11 and a thinner upper roller roller 12, and a roller skin wrapped outside the two roller rollers. Among them, the upper driven pulling roller of section A1 and the upper roller roller of section A2 are plugged and fixed, the lower roller roller of section A1 and the lower roller roller of section A2 are plugged and fixed, and the roller skin of section A1 and the roller skin of section A2 are independent of each other; the upper roller roller of section B1 and the upper roller roller of section B2 are plugged and fixed, the lower roller roller of section B1 and the lower roller roller of section B2 are plugged and fixed, and the roller skin of section B1 and the roller skin of section B2 are independent of each other. At both ends of the roller mechanism, there is a driving mechanism 2 to drive the opening and closing and rotation of the roller, wherein the outer end of the A1 section is the opening and closing mechanism, the outer end of the A2 section is the rotation mechanism, the outer end of the B1 section is the rotation mechanism, and the outer end of the B2 section is the opening and closing mechanism; that is, the roller mechanism as a whole is a centrally symmetrical structure. Therefore, the following only describes the rollers of the A1 and B1 sections, and the B2 and A2 sections are the same.

[0021] An opening and closing mechanism is provided at the end of the A1 section roller, including a transmission shaft 21, which rotates with the lower roller roller of the A1 section roller; a driving shaft 22 is provided below the transmission shaft 21, the driving shaft 22 is connected to the first gear 23, the transmission shaft 21 is connected to the second gear 24, and the first gear 23 and the second gear 24 are meshed with each other; when the driving shaft 22 rotates, it drives the first gear 23 to rotate, so that the second gear 24 rolls on the first gear and drives the transmission shaft 21.

[0022] The end of the B1 section roller is provided with a rotating mechanism, including a transmission shaft 31, the transmission shaft 31 has a prismatic head 311, and cooperates with the lower roller of the B1 section roller. The transmission shaft 31 is fixedly connected to the sprocket 33. When the sprocket 33 rotates, the transmission shaft 31 is driven to rotate, and the lower roller of the B1 section is driven to rotate, and then the roller skin of the B1 section is driven to roll.

[0023] The transmission shaft 21 carries a first eccentric gear 20, and the transmission shaft 31 carries a second eccentric gear 30. The first eccentric gear 20 and the second eccentric gear 30 mesh with each other; the transmission shaft 21 is connected to the first eccentric gear 20 via a key 211, and the transmission shaft 31 is connected to the second eccentric gear 30 via a bearing. When the first gear 23 drives the second gear 24 to rotate, the transmission shaft 21 also rotates, driving the eccentric gear 20, and then driving the eccentric gear 30 to rotate, causing the transmission shafts 21 and 31 to separate, and also causing the lower rollers of the A1 section and the B1 section to deviate from their original positions, so that the distance between roller A and roller B becomes larger, that is, causing the roller device to open.

[0024] The eccentric gears 20 and 30 are each fixed with a coaxial limiting wheel 201 and 301, and the limiting wheel has a smooth circumferential surface, which contacts the limiting plates 25 and 35 on both sides, thereby limiting the spatial position of the eccentric gears 20 and 30. That is, when the eccentric gears 20 and 30 rotate, their own positions remain unchanged, and the transmission shafts 21 and 31 perform a circular motion with a smaller radius with the eccentric gears, so that the lower rollers of the A1 section and the B1 section also perform the same motion, so that the rollers A and B are opened.

[0025] Since the rollers of the A1 section are the same as those of the B2 section, and the rollers of the B1 section are the same as those of the A2 section, the B2 section has the same opening and closing mechanism and the A2 section has the same rotating mechanism. At the same time, the rollers of the A1 section and the A2 section are connected together, so one end of the A roller is the opening and closing mechanism and the other end is the rotating mechanism, while the B roller is the opposite. Therefore, the A roller and the B roller in this embodiment are actually the same, and the driving mechanisms at both ends jointly drive the rollers to open and close and rotate.

[0026] A long rod 13 is provided below the A1 section and the B2 section, and the B2 section is taken as an example. A swivel seat 26 is provided at both ends of the roller, and a middle base 42 and a middle swivel seat 41 are provided in the middle, and the long rod 13 is installed between the swivel seat 26 and the middle swivel seat 41. The middle base 42 is fixed on the frame, and has an axial hole 422 for the long rod 13 to be pivotally connected thereto; and an upward limiting plane 421 is also provided. It also includes a connecting block 43, and the lower part of the connecting block has an axial hole 431 for the lower roller 11 to pass through it; the upper part is an arc-shaped notch 432 for the upper roller 12 to be placed on it; the connecting block 43 is placed on the middle base 42, so that the lower edge of the connecting block contacts the limiting surface 421. It also includes a gap adjusting member 45, the middle of which is passed through by a long rod 13 pivotally connected to the middle base, so that the gap adjusting member 45 is pivotally connected to the middle base 42; the upper part of the gap adjusting member has an axial hole 451 for the lower roller 11 to pass through; the lower end of the gap adjusting member is an inverted U-shaped free end 452; the stopper shaft 44 is installed on the middle swivel seat 41, and the end with a cam-shaped cross-section extends into the notch of the inverted U-shaped free end 452; when the stopper shaft 44 is turned, the shape of its end can slightly change the position of the free end 452, thereby fine-tuning the position of the axial hole 451.

[0027] In the above-mentioned area, the lower roller 11 is simultaneously inserted into the shaft hole 451 of the gap adjusting member 45 and the shaft hole 431 of the connecting block 43. The connecting block simultaneously supports the upper roller 12 and is tensioned by the roller skin to form a set of rollers. When the lower roller is pushed to change its position by the gap adjusting member 45, the above-mentioned set of rollers slides as a whole by virtue of the cooperation between the lower edge of the connecting block 43 and the limiting surface 421, thereby adjusting the gap between the A roller and the B roller.

Claims

1. The roller mechanism of the knitting machine consists of a pair of rollers that are symmetrical on both sides. Each roller includes a thicker lower roller and a thinner upper roller. The outer periphery of the two rollers is wrapped with a tensioned roller skin, which wraps the upper and lower rollers. When the lower roller rotates, the roller leather is driven to rotate; the characteristic is that: at least one end of the two lower rollers is provided with an opening and closing mechanism, and the opening and closing mechanism includes a pair of eccentric gears meshing with each other, each eccentrically installed on a lower roller; the two eccentric gears are each fixedly connected with a coaxial limiting wheel, and there are limiting plates fixed on the frame on both sides of the limiting wheel, which are tangent to the limiting wheel.

2. The roller mechanism of a flat knitting machine according to claim 1, characterized in that: Both ends of the two lower rollers are provided with opening and closing mechanisms, and the two sets of opening and closing mechanisms are symmetrical to each other, that is, one end of one lower roller is an active eccentric gear, and the other end of the other lower roller is an active eccentric gear, each driving a driven eccentric gear meshing therewith.

3. The roller mechanism of a flat knitting machine according to claim 2, characterized in that: Each roller also includes at least one connecting block, and the lower roller roller and the upper roller roller are respectively rotatably connected to the connecting block; the connecting block has a protruding lower edge, which contacts with a limiting surface fixedly connected to the frame, thereby limiting the rotation of the connecting block relative to the frame.

4. The roller mechanism of a flat knitting machine according to claim 3, characterized in that: The connecting block is arranged at the end of the roller.

5. The roller mechanism of a flat knitting machine according to claim 3, characterized in that: The connecting block is arranged in the middle part of the roller, and a middle base fixedly connected to the frame is arranged below the connecting block, and the lower edge of the connecting block contacts the limiting surface on the middle base; a gap adjustment member is pivotally connected to the middle base, and the pivot point becomes a fulcrum, one end of which is fixedly connected to the connecting block, and the other end is an adjustable free end.

6. The roller mechanism of a flat knitting machine according to claim 5, characterized in that: It also includes a long rod, which is arranged below the roller and parallel to the lower roller and coaxial with the pivot point of the gap adjusting member; one end is connected to the gap adjusting member, and the other end is connected to one end of the lower roller with a driven eccentric gear.

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