CN206188992U - Clamping ring device with self -locking function - Google Patents

Abstract

The utility model relates to a pressure ring device with self-locking function, which comprises a connecting rod, a crank, a motor, a frame, a pressure ring piece, a short shaft and a slider; the frame is mainly composed of a connecting part and an embedded slideway. The part is connected with the motor shaft on the motor, the embedded slideway is arc-shaped, and the embedded slideway is connected with the slider; the crank is fixed on the motor shaft of the motor through the shaft center hole; the shaft center hole at the end of the connecting rod is connected with the The sliders are connected with each other, and the rotating axis hole on the upper part of the connecting rod is connected with the crank through a short shaft; the pressure ring piece and the connecting rod are fixedly connected as one, and the pressure ring device can be reliably in the retracted state or extended state, simplifying the mechanical structure of the device, The difficulty of maintenance is reduced, and the use of the principle of the dead point of the four-bar mechanism is proposed so that the press ring mechanism has a self-locking function, which effectively prevents the press ring mechanism from malfunctioning.

Description

Press ring device with self-locking function

technical field

The utility model relates to a press ring device in the head of a computerized flat knitting machine.

Background technique

The cam system of flat knitting machines usually has a sinker device. The sinker device is a special pulling mechanism, which can realize the pulling and holding of a single coil, and can act on the whole process of knitting. It is very effective for starting up, forming product weaving, continuous multiple tuck and partial weaving. Based on this pulling technology, it is also possible to weave a whole piece of clothes after various pieces of clothing are joined together on the same machine, and some can even weave a whole garment, thus saving the waste of raw materials caused by sewing. and labor waste. In recent years, due to the wide application of electronic device technology on flat knitting machines, the combination of sinker technology and electronic control technology has greatly improved the knitting ability of flat knitting machines. The knitting process of the sinker device and knitting needles is as follows:

1. Assist the knitting needle to withdraw the loop. When the knitting needle rises under the action of the needle-trigger triangle and reaches the height of withdrawing the loop, in order to prevent the old loop from rising together with the needle when the knitting needle rises, the sinkers of the two needle beds rotate and close relative to the mouth of the needle bed to hold the old loop. sinking arc.

2. Pad the whole yarn. After the knitting needle withdraws the loop, it descends under the action of the needle pressing triangle and starts to eat the yarn. At the same time, the sinkers of the two needle beds rotate and open relative to the mouth of the needle bed, giving way to form a loop.

3. Closing, looping, bending, looping and pulling. After the yarn is inserted into the needle hook, the latch needle continues to descend, and the old loop pushes the needle latch to close, and is put on the needle latch, and then taken off from the needle. After the old coil is taken off, the latch needle continues to descend, and the new yarn is bent into a loop on the sinker. At this time, the sinker presses and holds the sinker arc of the old coil. The holding effect of the sinker is very important for re-forming loops on empty needles, weaving various three-dimensional patterns and forming products.

However, when the flat knitting needles are starting, the opening needles are arranged oppositely on the front and rear needle beds, and the interval between the needles is extremely narrow, so the sinker device is difficult to hold the coil. In order to solve the above-mentioned problems, a press ring device is thus produced.

Fig. 1 is a structural schematic diagram of a press ring device disclosed in the patent document US7059157. This device utilizes the working principle of the six-bar mechanism. As shown in Fig. 1, one end of the crank 11 is connected to the motor shaft 10a of the motor 10, when the motor shaft When 11a rotates, it drives the crank 11 to rotate, and the other end of the crank 11 is connected with the connecting rod 13, and the connecting rod 13 is also connected with the rocking bar 9, so that the crank 11, the connecting rod 13, the rocking rod 9, and the motor 10 form a crank rocker mechanism. And rocking bar 9 one ends are connected with motor 10 shells, and the other end is connected with connecting rod 12,13 by hinge, and connecting rod 12 is connected with slide block 15 by hinge at position 12a, like this rocking bar 9, connecting rod 12, slide block 15, The frame 6 constitutes a slider crank mechanism, in which the rocker 9 changes from a driven member to an active member, and when the connecting rod 13 moves under the drive of the crank 11, the connecting rod 13 will drive the connecting rod 12 to move , and finally the connecting rod 12 drives the slider 15 to move in the frame 6, and the slider 15 is limited to 5 degrees of freedom in the through groove 6a of the frame 6, so that it can only slide in one direction. This device not only has the function of the sinker device, but also solves some problems caused by the sinker device, but the disadvantage of the ring hold-down device is also obvious, that is, the structure of the ring hold-down device is relatively complicated. On the one hand, it not only increases the The overall quality of the machine head, on the other hand, is not conducive to the repair and maintenance of the machine head.

Contents of the invention

In order to make the ring-holding device in the triangular system of the machine head reliably press the coils on the knitting needles, the utility model provides a ring-holding device whose coil action part can be reliably in the retracted state or extended state, and simplifies the mechanism of the device. structure, which reduces the difficulty of maintenance, and proposes to use the principle of the dead point of the four-bar mechanism to make the press ring mechanism have a self-locking function, effectively preventing the press ring mechanism from malfunctioning.

The technical scheme adopted by the utility model to solve the above-mentioned problems is: a ring-holding device with self-locking function, which is mainly composed of a connecting rod, a crank, a motor, a frame, a ring-pressing piece, a short shaft, and a slider. Utilizing the dead point principle of the slider crank mechanism, when the crank and the connecting rod are in line, the crank and the connecting rod will always remain in line when the motor shaft does not rotate.

The frame of the utility model is mainly composed of a connecting part and an embedded slideway, the connecting part is connected with the motor, so that the device as a whole has sufficient rigidity, and the embedded slideway is arc-shaped, so that the slider can move freely in the slideway. Regular sliding.

The slider is mainly composed of a sliding part and a connecting part of the slider. The sliding part of the slider can slide in the embedded track of the frame.

Both ends of the crank have rotation axis holes, and the crank head axis holes are fixed on the motor shaft, so that the crank can rotate with the rotation of the motor shaft, and the crank tail axis hole is connected with the connecting rod through a hinge.

Both ends of the connecting rod have rotation axis holes, the upper axis hole of the connecting rod connects the crank with the connecting rod through a short shaft, and the axis hole at the end of the connecting rod is hingedly connected with the connecting part of the slider.

The pressure ring piece is composed of a connection part with a connection hole and an action part. The connection part is connected with the connecting rod by a screw, so that the pressure ring piece and the connecting rod are integrated. The shape of the action part is bar-shaped, and its main function is to hold the coil. effect.

When the utility model is in the extended state, the ring-pressing piece at the front of the ring-pressing device will press the yarn coil, and when the knitting needle is rising to hook the yarn to form a new coil, the old coil will be pressed down. At the same time, when the ring pressing piece presses the yarn, under the action of tension, the yarn will also generate a reaction force on the front of the ring, but because the crank and the connecting rod are in a collinear state at this time, the four-bar mechanism produces a dead point phenomenon, the crank and connecting rod will not move and continue to maintain a collinear state. Due to the characteristics of the device's own structure, the front part of the pressure ring can play all the functions of the sinker in the narrow space of the front and rear needle beds.

The utility model utilizes the working principle of the crank slider mechanism to effectively prevent misoperation, that is, only when the motor shaft rotates and the collinear relationship between the crank and the connecting rod is destroyed, the crank and the connecting rod can produce relative motion, and the connecting rod can be received at this time , the old coil held by the ring piece can be released.

Description of drawings

FIG. 1 is a schematic structural view disclosed in Patent Document 1. FIG.

Fig. 2 is an exploded view of the embodiment of the utility model.

Fig. 3 is the front view of the utility model embodiment.

Fig. 4 is a top view of the utility model embodiment.

Fig. 5 is a left view of the utility model embodiment.

Fig. 6 is a front view of the rack in Fig. 2 .

Fig. 7 is a top view of the rack in Fig. 2 .

Fig. 8 is a left side view of the rack in Fig. 2 .

Fig. 9 is a front view of the connecting rod in Fig. 2 .

Fig. 10 is a top view of the connecting rod in Fig. 2 .

Fig. 11 is a left side view of the connecting rod in Fig. 2 .

Fig. 12 is a front view of the crank in Fig. 2 .

Fig. 13 is a top view of the crank in Fig. 2 .

Fig. 14 is a front view of the pressure ring piece in Fig. 2 .

Fig. 15 is a top view of the ring holding piece in Fig. 2 .

Fig. 16 is a schematic structural view of the utility model when it is in a non-working state.

Fig. 17 is a schematic structural view of the utility model when it is in working condition.

Fig. 18 is a schematic diagram of the mechanism movement of the utility model when it is in a non-working state.

Fig. 19 is a schematic diagram of the mechanism movement when the utility model is in working condition.

In the figure: connecting rod 1, shaft center hole 1a, shaft center hole 1b, pressure ring fixing hole 1c, crank 2, rotation shaft center hole 2a, tail shaft center hole 2b, motor 3, motor shaft 3a, frame 4, Connection part 4a, embedded slideway 4b, pressure ring piece 5, connection hole 5a, action part 5b, short shaft 6, screw 7, slider 8, sliding part 8a, slider connecting part 8b.

detailed description

The utility model will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the utility model and the utility model is not limited to the following examples.

As shown in Figure 2-19, a ring clamping device with self-locking function of the utility model is mainly composed of a connecting rod 1, a crank 2, a motor 3, a frame 4, a ring clamping piece 5, a short shaft 6, and a screw 7 , slider 8 components.

As shown in Figure 6-8, the frame 4 is mainly composed of the connecting part 4a and the embedded slideway 4b. The connecting part 4a is connected with the motor 3 through screws, so that the whole device has sufficient rigidity, and the embedded slideway 4b is in the shape of The arc shape enables the sliding part 8a of the slider 8 to slide regularly in the embedded slideway 4b.

As shown in Figures 9-11, the connecting rod 1 is mainly composed of a rotation axis hole 1a, an axis hole 1b and a ring fixing hole 1c. The shaft center hole 1b at the tail of the connecting rod 1 is connected with the slider connecting part 8b, so that the connecting rod 2 and the slider 8 are integrated, and the shaft center hole 1a at the upper part of the connecting rod 1 connects the crank 2 to the connecting rod 1 through the short shaft 6 .

The slider 8 is mainly composed of a sliding part 8a and a slider connecting part 8b. The sliding part 8a of the slider is a rolling bearing, which can slide in the embedded track 4b of the frame 4 . The slider connecting portion 8b is in the shape of a rod, so that the slider connecting portion 8b can be matched with the shaft center hole 1b of the connecting rod 1 .

As shown in Figures 12-13, both ends of the crank 2 have a rotating shaft hole 2a and a shaft hole 2b, and the crank 2 is fixed on the motor shaft 3a through the head shaft hole 2a, so that the crank 2 follows the motor shaft 3a. Rotate and rotate, crank 2 tail shaft center hole 2b and connecting rod 1 are connected by hinge.

As shown in Figure 14-15, there is a connection hole 5a on the pressure ring piece 5, and the pressure ring piece 5 is fixedly connected with the connecting rod 1 through the screw 7, the connection hole 5a, and the pressure ring piece fixing hole 1c. When stretching out and retracting, the front acting part 5b of the pressure ring piece 5 also moves together with it, thereby producing a pressing effect on the yarn.

In the utility model, when the connecting rod 2 is in the protruding state, the front acting part 5b of the ring-holding piece 5 will press the yarn, and the yarn will also produce a reaction to the front acting part 5b of the ring-holding piece 5 under the action of tension. However, since the crank 2 and the connecting rod 1 are in the collinear state at this time, the dead point phenomenon occurs in the four-bar mechanism, and the crank 2 and the connecting rod 1 will not move and continue to maintain the collinear state. Only when the motor shaft 3a rotates and the collinear relationship between the crank 2 and the connecting rod 1 is destroyed, the crank 2 and the connecting rod 1 can produce relative motion, and at this time the connecting rod 1 can be retracted and pressed by the front acting part 5b of the pressure ring 5 Only the old coil held by it can be released.

Fig. 16 is a schematic structural view of the utility model in a non-working state, and Fig. 17 is a schematic structural view of the utility model in a working state. When the hold-down device changes from the retracted state to the extended state, the sliding part 8a of the slider moves counterclockwise along the arc-shaped embedded slideway 4b. The front acting part 5b of the loop holding piece 5 has a tendency to press downwards. Under the action of this action, when the latch needle rises to hook new yarn to form a new loop, the old loop will be drawn from the hook of the latch needle. Press to the needle bar; when the press ring device changes from the extended state to the retracted state, the sliding part 8a of the slider moves clockwise along the arc-shaped embedded slideway 4b. The front acting part 5b of the pressure ring sheet 5 moves upwards, and the original gap between the front and rear needle beds of the flat knitting machine reappears, and the flat knitting machine can lay new yarns at this moment.

Claims (3)

1. a kind of clamping ring device with auto-lock function, it is characterised in that：It is main by connecting rod, crank, motor, frame, trim ring piece, Short axle, sliding block composition；The frame is mainly made up of connecting portion with embedded slideway, the motor shaft phase on connecting portion and motor Connection, it is in arc line shaped to embed slideway, embeds slideway and coordinates with sliding block；The crank is fixed on the motor shaft of motor by axle center hole On；The connecting rod afterbody center of rotation hole is connected with sliding block, and connecting rod top center of rotation hole is connected with crank by short axle； The trim ring piece is affixed with connecting rod to be integrally formed.

2. the clamping ring device with auto-lock function according to claim 1, it is characterised in that：State is stretched out when connecting rod is in When, trim ring piece front portion will play pressing to yarn, while yarn also anterior to trim ring piece can produce one under tension Counter-force, because four-bar mechanism produces dead point principle, crank will not occur relative motion and continue to keep coUinear state with connecting rod.

3. the clamping ring device with auto-lock function according to claim 1, it is characterised in that：When crank and connecting rod are in altogether During wire state, only when motor shaft is rotated so as to drive crank to rotate, crank and connecting rod collinear relationship are destroyed, crank and connecting rod are Relative motion can be produced.