CN201146177Y - A filament cutting device - Google Patents

Abstract

The utility model relates to a filament cutting device working in an electric drive mode, comprising a knife holder, a first knife rod, a second knife rod, a stepping motor, a first transmission mechanism and a second transmission mechanism. The first knife rod is rotatably arranged on the knife holder, and the rod end of the first knife rod is provided with a first blade. The second knife rod is rotatably arranged on the knife holder, and the rod end of the second knife rod is provided with a second blade, and the second blade is opposite to the first blade. The stepping motor is arranged on the tool holder, and the stepping motor outputs a rotation action with a predetermined rotation angle through the crank hub. The first transmission mechanism and the second transmission mechanism transmit this rotation action to the first knife bar and the second knife bar respectively, so that the first blade and the second blade turn to the shred cutting position or return to a reference position, wherein the first blade and the second blade The blades close at the filament cut position to cut the filament.

Description

A filament cutting device

technical field

The utility model relates to a filament cutting technology on a filament automatic winding device, in particular to a filament cutting device.

Background technique

During the filament winding process, the end of the filament needs to be cut off with a blade after the tungsten filament is wound. The current method is to use the cylinder as a drive to drive the blade on the cutter bar to cut the tungsten wire. Figure 1 shows the wire cutting device on the double-axis wire winding machine. As shown in FIG. 1 , the upper tool bar 2 is fixed on the tool seat 10 through the pin shaft 3 and is elbowed with the output shaft 1 of the cylinder 4 through its extension arm. The lower cutter bar 6 is fixed on the cutter seat 10 through the pivot pin 5 and is interlocked with the upper cutter bar 2 through a pair of short arms abutting against each other. When the cylinder 4 drives the upper knife bar 2 to rotate, the stud 13 on the short arm of the upper knife bar 2 promotes the short arm on the lower knife bar 6 to rotate in the opposite direction, and the two blades 11, 12 close up and cut off the tungsten wire. When shredding finishes, lower cutter bar 6 forwards to be blocked by the locating post 8 that is fixed on its below, and two cutter bars stop rotating simultaneously. Then the reverse movement of the cylinder 4 drives the upper knife rod 2 to return to the original position, and the spring 9 drives the lower knife rod to return to the original position, and the whole shredding process ends.

Yet above-mentioned device has the following deficiencies: (1) because cutter bar 6 rotates very fast, with positioning post 8 limit can produce larger impact noise; The maintenance work of the pneumatic system is increased; (3) the overlapping amount of cutting edges of the blades 11 and 12 depends on the adjustment stud 13 and the positioning column 8, and the operation is cumbersome; (4) the spring used for reset is prone to fatigue failure.

Utility model content

The technical problem to be solved by the utility model is to provide a filament cutting device driven by an electric motor without compressed air source.

The technical solution adopted by the utility model to solve the above technical problems is to provide a filament cutting device, which includes a knife holder, a first cutter bar, a second cutter bar, a stepping motor, a first transmission mechanism and a second transmission mechanism. The first knife rod is rotatably arranged on the knife holder, and the rod end of the first knife rod is provided with a first blade. The second knife rod is rotatably arranged on the knife holder, and the rod end of the second knife rod is provided with a second blade, and the second blade is opposite to the first blade. The stepping motor is arranged on the tool holder, and a crank hub is arranged on the output shaft of the stepping motor, and the stepping motor outputs a rotation action with a predetermined rotation angle through the crank hub. The first transmission mechanism is connected to the crank base and the first knife bar, and is used to transmit the rotation action to drive the first blade on the first knife bar to turn to the thread cutting position or return to a reference position; the second transmission mechanism is connected to the crank base and the first knife bar. The second knife bar is used to transfer the rotation action to drive the second blade on the second knife bar to turn to the wire cutting position or return to a reference position; wherein the first blade and the second blade are closed at the wire cutting position to cut the filament.

In the above-mentioned filament cutting device, the first transmission mechanism may include a first connecting rod, which has a joint bearing at both ends, wherein one joint bearing is connected to the crank hub by a pin screw, and the other joint bearing is connected by another pin screw. The first arbor. In addition, the first connecting rod may further include a nut, which is connected to the above two joint bearings.

In the above-mentioned filament cutting device, the second transmission mechanism may include a second connecting rod, which has a joint bearing at both ends, wherein one joint bearing is connected to the crank hub by a pin screw, and the other joint bearing is connected by another pin screw. Second blade. In addition, the second connecting rod may further include a nut, and the nut is connected to the above two joint bearings.

In the above-mentioned filament cutting device, the stepping motor has a controller for controlling the rotation angle and the rotation speed of the stepping motor.

The above-mentioned filament cutting device can also include a sensing and measuring device, which includes a transmitter and a detector, and the transmitter is arranged on the crank hub to continuously send out positioning signals. The detector is arranged on one side of the crank hub and is electrically connected to the controller, and is used to send a signal to the controller indicating that the first and second cutter rods return to the reference position when the positioning signal is detected. In addition, the filament cutting device further includes an operating unit electrically connected to the controller for inputting the set rotation angle and rotation speed to the controller.

The filament cutting device proposed by the utility model, due to the application of a new driving mode, has the following advantages while realizing the filament cutting function: (1) There is no mechanical limit structure, which avoids the impact noise generated thereby; (2) Compressed gas source is required, which reduces maintenance work; (3) Calibration of the blade cutting position can be completed by inputting values through the keyboard, and the operation is simple and easy; (4) Different cutting speeds can be selected by inputting values through the keyboard .

Description of drawings

In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model will be described in detail below in conjunction with the accompanying drawings, wherein:

Fig. 1 is a schematic diagram of a filament cutting device of an existing filament winding machine.

Fig. 2A is a schematic structural view of the filament cutting device of the filament winding machine according to the present invention.

Fig. 2B is a three-dimensional exploded view of the filament cutting device of the filament winding machine according to the present invention.

Fig. 3 is a block diagram of the electric control system of the filament cutting device.

Detailed ways

Please refer to Fig. 2A and shown in Fig. 2B, a kind of filament cutting device of the present utility model comprises a knife rest 100, is fixed with stepper motor 101 on the knife rest 100, is located at the crank hub 111 on the stepper motor output shaft, the first The cutter bar 121 and the second cutter bar 131 . The stepper motor is used to output a predetermined rotation angle and drive the crank hub 111 to rotate accordingly. The first knife rod 121 is mounted on the pin shaft 125 through the bearing 124 and can rotate around it, and the pin shaft 125 is fixed on the knife holder 100 . The first knife rod 121 has a rod end 121a on which the first blade 122 is fixed by a screw 123 . The second knife bar 131 is disposed below the first knife bar 121 , and is mounted on a pin shaft 135 through a bearing 134 and can rotate around it. The pin shaft 135 is fixed on the knife holder 100 . The second knife rod 131 has a rod end 131a on which the second blade 132 is fixed by a screw 133 . The first blade 122 and the second blade 132 are, for example, facing up and down, but this is not a limitation.

The crank hub 111 is connected to the first cutter bar 121 and the second cutter bar 131 through a transmission mechanism such as a connecting rod, so as to transmit the rotation action output by the stepping motor. Specifically, the first connecting rod 112 is used as the first transmission mechanism connecting the crank hub 111 and the first cutter bar 121, and the two ends of the first connecting rod 112 have joint bearings 114a, 114b respectively, wherein the joint bearing 114a passes through the pin screw 113a Fixed on the crank hub 111, another joint bearing 114b is connected with the connecting arm 121b of the first knife rod 121 through a pin screw 113b. The two joint bearings 114a, 114b can be connected by a nut 115 so as to adjust the length of the first connecting rod 112, but this is not a limitation. The joint bearings 114a, 114b can be joint bearings with screw holes, and there is a A screw replaces the above nut to form the connecting rod.

Similarly, the second connecting rod 116 is used as the second transmission mechanism connecting the crank hub 111 and the second cutter bar 131, and the two ends of the second connecting rod 116 have joint bearings 118a, 118b respectively, wherein the joint bearing 116a is fixed by pin screws 117a On the crank base 111, another joint bearing 118b is connected with the connecting arm 131b of the second tool bar 131 by means of a pin screw 117b. The two joint bearings 118a, 118b can be connected by a nut 119 so as to adjust the length of the second connecting rod 116, but this is not a limitation. The joint bearings 118a, 118b can be joint bearings with screw holes, and the joint bearings 118a, 118b can be joint bearings with screw holes. A screw replaces the above nut to form the connecting rod.

In addition, the wire cutting device of the present utility model also includes a sensing and measuring device for controlling the rotational reference position of the stepper motor, which includes a transmitter 104 and a detector 105, wherein the transmitter 104 is located on the crank shaft 111 to continuously send a positioning signal, and the detector 105 is arranged on one side of the crank hub 111 to detect the positioning signal.

Referring to Fig. 3, this is a structural block diagram of the electric control part of the shredding device of the present invention. Wherein the stepper motor 101 has a controller 102, in order to control the rotation angle and the rotation speed of the stepper motor 101, the controller 102 can be connected with an operation unit 103 such as setting a keyboard, to receive the user's rotation angle and rotation speed setting. Wherein, the rotation angle is used to adjust the cutting amount when cutting the filament, and the rotation speed is related to the cutting speed. In addition, the above-mentioned detector 105 is connected to the controller 102 to provide a reference position signal of the stepping motor.

With reference to Fig. 2A, 2B and shown in Fig. 3, the operating principle of the shredding device of the present utility model is as follows:

First is the debugging stage. When the second blade 132 reaches the highest position upwards during the rotation of the stepping motor 101, the edge of the second blade 132 can be made close to the filament by adjusting the nut 119 in the second connecting rod 116, and by adjusting The nut 115 in the first link 112 causes the edge of the first blade 122 to converge (preferably overlap) the edge of the second blade 132 . On this basis, the amount of overlapping can be adjusted by inputting a rotation angle setting value through the operation unit 103 .

When the wire cutting cycle starts, under the control of the rotation angle set by the controller 102, the stepper motor 101 will output a clockwise rotation motion and drive the crank hub 111 to rotate, and this rotation motion passes through the first connecting rod 112 and the second The two connecting rods 116 transmit to the first cutter bar 121 and the second cutter bar 131 respectively. Wherein the first knife rod 121 will rotate clockwise, thereby driving the first blade 122 at the rod end to move down to the shredding position. The second knife rod 131 will rotate counterclockwise, thereby driving the second blade 132 at the rod end to move upward to the shredding position. Therefore, the first blade 122 and the second blade 132 overlap at the filament cutting position to cut the filament.

Then, the controller 102 can control the stepping motor 101 to rotate in reverse, and in the process, the transmitter 104 on the crank hub 111 can rotate thereupon, and when the detector 105 detects the transmitter 104 on the crank hub 111, The reference position signal will be output to the controller 102, indicating that the stepper motor 101 has returned to the reference position, so the controller 102 will stop the stepper motor 101 from rotating, and wait for the next shred cycle.

In summary, the filament cutting device described in the above embodiments of the present utility model, due to the application of a new driving method, has the following advantages while realizing the filament cutting function: (1) There is no previous mechanical limit structure, avoiding The resulting impact noise is reduced; (2) no compressed gas source is required, which reduces maintenance work; (3) the calibration of the blade cutting position can be completed by inputting values through the keyboard, compared with the previous method of adjusting the stud The operation is simple and easy; (4) Different cutting speeds can be selected by inputting values through the keyboard.

Although the present utility model has been disclosed above with preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model should be defined by the claims.

Claims (8)

1. filament disconnecting device is characterized in that comprising:

Knife rest;

First knife bar is located on the described knife rest with rotary way, and the rod end of described first knife bar is provided with first blade;

Second knife bar is located on the described knife rest with rotary way, and the rod end of described second knife bar is provided with second blade, and second blade is relative with first blade;

Stepping motor is located on the described knife rest, and the stepping motor output shaft is provided with a crank and draws a bow to the full, and described stepping motor is drawn a bow to the full by described crank and exported the predetermined rotational action of an anglec of rotation;

First transmission mechanism connects described crank and draws a bow to the full and described first knife bar, turns to a chopping position or returns a reference position with first blade that drives on first knife bar in order to transmit described rotational action;

Second transmission mechanism connects described crank and draws a bow to the full and described second knife bar, turns to a chopping position or returns a reference position with second blade that drives on second knife bar in order to transmit described rotational action;

Wherein first blade and second blade close up in the chopping position to cut off filament.

2. filament disconnecting device as claimed in claim 1, it is characterized in that, described first transmission mechanism comprises first connecting rod, its two ends have an oscillating bearing respectively, wherein an oscillating bearing links described crank and draws a bow to the full by a pin screw, and another oscillating bearing links described first knife bar by another pin screw.

3. filament disconnecting device as claimed in claim 2 is characterized in that described first connecting rod also comprises a nut, and described nut connects described two oscillating bearings.

4. filament disconnecting device as claimed in claim 1, it is characterized in that, described second transmission mechanism comprises second connecting rod, its two ends have an oscillating bearing respectively, wherein an oscillating bearing links described crank and draws a bow to the full by a pin screw, and another oscillating bearing links described second knife bar by another pin screw.

5. filament disconnecting device as claimed in claim 4 is characterized in that described second connecting rod also comprises a nut, and described nut connects described two oscillating bearings.

6. filament disconnecting device as claimed in claim 1 is characterized in that described stepping motor has a controller, in order to the anglec of rotation and the rotary speed of control step motor.

7. filament disconnecting device as claimed in claim 6 is characterized in that, also comprises a sense measuring device, and described sense measuring device comprises:

One sender unit is located at described crank and is drawn a bow to the full upward to continue to send framing signal;

One detector is located at a draw a bow to the full side and be electrically connected described controller of described crank, in order to send the signal that described first and second knife bars of indication are got back to the reference position to controller when detecting described framing signal.

8. filament disconnecting device as claimed in claim 6 is characterized in that, also comprises an operating unit, is electrically connected described controller, in order to the anglec of rotation and the rotary speed of setting to described controller input.

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