A reciprocating transmission device and a cutting knife device

Abstract

The invention discloses a reciprocating transmission device and a cutter device. The reciprocating transmission device comprises a motor, a transmission mechanism, a moving assembly, a conductive rod, a bracket and a switching circuit. The conductive rod comprises first to third conductive rods which are arranged on the bracket at intervals from each other. The motor drives the transmission mechanism to drive the moving assembly to move back and forth along the axial direction of the conductive rod and to make active electrical contact with the conductive rod. The third conductive rod is electrically connected to the first and second conductive rods through the moving assembly. The switching circuit is used to switch the first and third conductive rods to be connected in series to a motor power supply circuit to form a forward power supply or the second and third conductive rods to be connected in series to a motor power supply circuit to form a reverse power supply. A first insulating limit portion is provided at the left end of the first conductive rod. When the moving assembly moves to the left to the first insulating limit portion, the first conductive rod is insulated from the moving assembly. A second insulating limit portion is provided at the right end of the second conductive rod. When the moving assembly moves to the right to the second insulating limit portion, the second conductive rod is insulated from the moving assembly.

Description

Technical Field

[0001] The invention belongs to the field of automation devices, and in particular relates to a reciprocating transmission device and a cutting device. Background Art

[0002] Reciprocating transmission devices are widely used in the field of automated machinery, and can realize certain important process processing in a single axis, such as cutting, drawing, positioning, etc. There are also many types of reciprocating transmission devices, the mainstream of which are screw drive and belt drive. Compared with screw drive that meets higher positioning accuracy requirements, belt drive has lower application cost and is suitable for low-end automation applications. Most belt drives are driven by ordinary motors, and engineers need to design left and right limiters in the application to prevent belt drive overshoot and equipment failure.

[0003] In existing belt drive applications, the traditional left and right limit method is to add a limit switch on each side, such as a metal induction switch, a reflective photoelectric switch, etc. However, no matter which switch detection method is used, it is inevitable that the switch will fail abnormally. The consequence of switch failure is that the motor drives the belt to overshoot, equipment failure, low safety, and adding limit switches is costly. Summary of the invention

[0004] The purpose of the present invention is to provide a reciprocating transmission device to solve the above-mentioned technical problems.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a reciprocating transmission device, including a motor, a transmission mechanism, a moving assembly, a conductive rod, a bracket and a switching circuit, the conductive rods include a first conductive rod, a second conductive rod and a third conductive rod, the first conductive rod, the second conductive rod and the third conductive rod are fixedly arranged on the bracket and arranged at intervals from each other, the moving assembly is in movable electrical contact with the conductive rods, the motor is used to drive the transmission mechanism to drive the moving assembly to move back and forth along the axial direction of the conductive rods, the third conductive rod is electrically connected to the first conductive rod and the second conductive rod through the moving assembly, and the switching circuit is used to switch the first conductive rod and the third conductive rod to be connected in series to the motor The power supply circuit forms a forward power supply or the second conductive rod and the third conductive rod are connected in series to the motor power supply circuit to form a reverse power supply. The axial direction of the conductive rod is defined as the left and right direction. The left end of the first conductive rod is provided with a first insulating limit portion. When the motor drives the transmission mechanism to drive the moving component to move to the left to the first insulating limit portion, the first conductive rod is insulated from the moving component, the motor power supply circuit is disconnected, and the motor stops. The right end of the second conductive rod is provided with a second insulating limit portion. When the motor drives the transmission mechanism to drive the moving component to move to the right to the second insulating limit portion, the second conductive rod is insulated from the moving component, the motor power supply circuit is disconnected, and the motor stops.

[0006] Furthermore, the first insulating limit portion is composed of a first insulating sleeve sleeved on the first conductive rod, and the second insulating limit portion is composed of a second insulating sleeve sleeved on the second conductive rod.

[0007] Furthermore, the outer circumferential surface of the first insulating sleeve is flush with the outer circumferential surface of the first conductive rod, and the outer circumferential surface of the second insulating sleeve is flush with the outer circumferential surface of the second conductive rod.

[0008] Furthermore, the moving component includes a slider, which is made of metal material and has three through holes. The slider is slidably mounted on the first conductive rod, the second conductive rod and the third conductive rod through the three through holes and is slidably electrically connected to the first conductive rod, the second conductive rod and the third conductive rod.

[0009] Furthermore, a metal ball bearing is fixedly arranged in the through hole, and the through hole is sleeved on the conductive rod through the ball bearing.

[0010] Furthermore, the transmission mechanism is a belt transmission mechanism, and the moving component is fixed on a belt of the belt transmission mechanism.

[0011] Furthermore, the transmission mechanism is arranged above the conductive rod.

[0012] Furthermore, the switching circuit is implemented by a three-pole double-throw relay.

[0013] The present invention also provides a reciprocating cutting device, comprising the reciprocating transmission device and a blade, wherein the blade is fixed on the moving component through a blade fixing seat.

[0014] Beneficial technical effects of the present invention:

[0015] The present invention uses the first insulating limit part and the second insulating limit part of the conductive rod to achieve automatic power off and stop at the left and right limit points during back and forth operation. There is no need to set a limit switch, which has high safety and low cost. The back and forth operation can be controlled by simply switching the control switching circuit accordingly, and the control is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural diagram of a reciprocating cutter device according to a specific embodiment of the present invention;

[0018] Figure 2It is a structural diagram of an omitted switching circuit of a reciprocating cutter device according to a specific embodiment of the present invention;

[0019] Figure 3 A structural diagram of another perspective of a reciprocating cutter device omitting a switching circuit according to a specific embodiment of the present invention;

[0020] Figure 4 An exploded view of a reciprocating cutter device omitting a switching circuit according to a specific embodiment of the present invention;

[0021] Figure 5 A partial cross-sectional view of a reciprocating cutter device according to a specific embodiment of the present invention;

[0022] Figure 6 It is a schematic diagram of a reciprocating cutter device running to a left limit point according to a specific embodiment of the present invention;

[0023] Figure 7 It is a schematic diagram of the reciprocating cutter device running to the right limit point according to a specific embodiment of the present invention. DETAILED DESCRIPTION

[0024] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0025] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0026] like Figure 1-7 As shown, a reciprocating cutting device includes a reciprocating transmission device and a blade 1, the reciprocating transmission device includes a motor 2, a transmission mechanism 3, a moving assembly 4, a conductive rod 5, a bracket 6 and a switching circuit 7, the conductive rod 5 includes a first conductive rod 51, a second conductive rod 52 and a third conductive rod 53, the first conductive rod 51, the second conductive rod 52 and the third conductive rod 53 are fixedly arranged on the bracket 6 and arranged at intervals from each other. Specifically, in this embodiment, the number of the brackets 6 is two, and the two brackets 6 are fixedly arranged at the left and right ends of the top surface of a long strip base 8 (with Figure 6 and 7 The structure is simple and compact, but it is not limited thereto. In some embodiments, the bracket 6 can also be implemented by other structures. The bracket 6 and the base 8 are made of insulating materials such as plastic, bakelite, etc.

[0027] The two ends of the first conductive rod 51, the second conductive rod 52 and the third conductive rod 53 are respectively fixedly inserted on the two brackets 6 and insulated from the two brackets 6. Preferably, in this embodiment, the first conductive rod 51, the second conductive rod 52 and the third conductive rod 53 are arranged parallel to each other and spaced apart, which is easier to use.

[0028] In this embodiment, the first conductive rod 51, the second conductive rod 52 and the third conductive rod 53 are made of metal materials, such as copper, copper alloy and other metals, with a simple structure, easy to implement and good conductive performance, but not limited to this. In some embodiments, the first conductive rod 51, the second conductive rod 52 and the third conductive rod 53 can also be made of insulating materials such as plastic, ceramics, etc. to make the rod body, and then a conductive sleeve, such as a metal sleeve, is provided on the outer circumference of the rod body, or a metal conductive layer is electroplated to achieve the effect.

[0029] The motor 2 is used to drive the transmission mechanism 3 to drive the moving component 4 to move back and forth along the axial direction of the conductive rod 5. The moving component 4 is in active electrical contact with the conductive rod 5, so that the third conductive rod 53 is electrically connected to the first conductive rod 51 and the second conductive rod 52 through the moving component 4.

[0030] Specifically, in this embodiment, the moving assembly 4 includes a slider 41, which is made of metal material. The slider 41 is provided with three through holes 411. The slider 41 is respectively slidably mounted on the first conductive rod 51, the second conductive rod 52 and the third conductive rod 53 through the three through holes 411, and is slidably electrically connected to the first conductive rod 51, the second conductive rod 52 and the third conductive rod 53. With this structure, the first conductive rod 51, the second conductive rod 52 and the third conductive rod 53 not only play a conductive role, but also play a role as a guide rail for the movement of the slider 41, so that the slider 41 moves more smoothly and smoothly, and no additional guide rail is required, and the structure is simpler and more compact. At the same time, the third conductive rod 53 is directly electrically connected to the first conductive rod 51 and the second conductive rod 52 through the slider 41 body, and the structure is simple and easy to implement. Of course, in some embodiments, the slider 41 can also be made of insulating material, and then three conductive members are provided on the slider 41 to be slidably electrically connected to the first conductive rod 51, the second conductive rod 52 and the third conductive rod 53, respectively, and the three conductive members are then electrically connected to each other.

[0031] Furthermore, a metal ball bearing 42 is fixed in the through hole 411, and the through hole 411 is arranged on the conductive rod 5 through the ball bearing sleeve 42. By setting the ball bearing 42, the sliding block 41 on the conductive rod 5 can slide more smoothly and have better conductivity. The conductive rod 5 is in conductive contact with the sliding block 41 through the ball bearing 42.

[0032] A first insulating limit portion 511 is provided at the left end portion of the first conductive rod 51. When the slider 41 moves to the left to the first insulating limit portion 511 (left limit point), the ball bearing 42 moves to be sleeved on the first insulating limit portion 511, so that the first conductive rod 51 is insulated from the slider 41, and further insulated and disconnected from the third conductive rod 53 and the second conductive rod 52; a second insulating limit portion 521 is provided at the right end portion of the second conductive rod 52. When the slider 41 moves to the right to the second insulating limit portion 521 (right limit point), the ball bearing 42 moves to be sleeved on the second insulating limit portion 521, so that the second conductive rod 52 is insulated from the slider 41, and further insulated and disconnected from the third conductive rod 53 and the first conductive rod 51.

[0033] In this embodiment, the first insulating limit portion 511 is composed of a first insulating sleeve 5111 sleeved on the first conductive rod 51, and the second insulating limit portion 521 is composed of a second insulating sleeve 5211 sleeved on the second conductive rod 52. The structure is simple and easy to implement, but it is not limited to this. In some embodiments, the first insulating limit portion 511 and the second insulating limit portion 521 can also be composed of insulating materials, such as insulating rods made of plastic, etc., which are fixed to the first conductive rod 51 and the second conductive rod 52 by bonding, welding, etc., or sprayed with an insulating coating on the first conductive rod 51 and the second conductive rod 52.

[0034] Preferably, the outer circumference of the first insulating sleeve 5111 is flush with the outer circumference of the first conductive rod 51 , and the outer circumference of the second insulating sleeve 5211 is flush with the outer circumference of the second conductive rod 52 , so that the movement of the slider 41 is smoother, but not limited thereto.

[0035] In this embodiment, the left end of the first insulating sleeve 5111 extends to the left end surface of the first conductive rod 51, so that the first insulating sleeve 5111 is conveniently sleeved on the left end of the first conductive rod 51, and the first insulating sleeve 5111 passes through the left bracket 6 to improve the insulation performance between the first conductive rod 51 and the left bracket 6. The right end of the second insulating sleeve 5211 extends to the right end surface of the second conductive rod 52, so that the second insulating sleeve 5211 is conveniently sleeved on the right end of the second conductive rod 52, and the second insulating sleeve 5211 passes through the right bracket 6 to improve the insulation performance between the second conductive rod 52 and the right bracket 6.

[0036] Preferably, the length from the right end of the first insulating sleeve 5111 to the left bracket 6 is greater than the axial width of the slider 41 along the conductive rod 5, so that when the slider 41 moves to the left, before the slider 41 hits the left bracket 6, the slider 41 is already located on the first insulating sleeve 5111 and is insulated and disconnected from the first conductive rod 51, thereby preventing the slider 41 from continuing to move and hitting the left bracket 6, thereby improving safety.

[0037] The length of the second insulating sleeve 5211 from the left to the right side bracket 6 is greater than the axial width of the slider 41 along the conductive rod 5, so that when the slider 41 moves to the right, before the slider 41 hits the right side bracket 6, the slider 41 is already located on the second insulating sleeve 5211 and is insulated and disconnected from the second conductive rod 52, thereby preventing the slider 41 from continuing to move and hitting the right side bracket 6, thereby improving safety.

[0038] In this embodiment, the right end of the first conductive rod 51, the left end of the second conductive rod 52, and the left and right ends of the third conductive rod 53 are respectively sleeved with a short insulating sleeve, which is inserted into the bracket 6 to improve the insulation performance.

[0039] The switching circuit 7 is used to switch the first conductive rod 51 and the third conductive rod 53 to be connected to the power supply circuit of the motor 2 to form a forward power supply, so that the motor 2 drives the transmission mechanism 3 to drive the slider 41 to move to the left; or switch the second conductive rod 52 and the third conductive rod 53 to be connected to the power supply circuit of the motor 2 to form a reverse power supply, so that the motor 2 drives the transmission mechanism 3 to drive the slider 41 to move to the right.

[0040] In this embodiment, the motor 2 is a DC motor, preferably an ordinary DC motor with low cost, but it is not limited to this. In some embodiments, the motor 2 can also be an AC motor, etc.

[0041] The switching circuit 7 is preferably implemented by a three-pole double-throw relay, which has a simple structure and is easy to implement. Figure 1 As shown, pins 1 and 2 of the three-pole double-throw relay are directly connected by wires, pin 3 is connected to the negative pole of the motor 2, pins 4 and 7 are connected to the negative pole of the DC power supply (+24V), pins 5 and 6 are connected to the positive pole of the DC power supply, pin 8 is connected to the second conductive rod 52, pin 9 is connected to the first conductive rod 51, and the third conductive rod 53 is connected to the positive pole of the motor 2. Pins 10 and 11 are control pins of the three-pole double-throw relay, which can control the three-pole double-throw relay to be normally open or normally closed. Of course, in some embodiments, the switching circuit 7 can also be implemented by other existing switching circuits.

[0042] Preferably, the transmission mechanism 3 is a belt transmission mechanism, which has low cost. The belt transmission mechanism includes a transmission belt 31 and two synchronous pulleys 32, which are respectively fixed on the two brackets 6 through two fixing seats 33. The transmission belt 31 is arranged on the two synchronous pulleys 32, and the output shaft of the motor 2 is connected to a synchronous pulley 32. The motor 2 is located below the fixing seat 33, and the structure is more compact. The slide 41 is fixed on one side of the transmission belt 31 through a fixing member 43.

[0043] The blade 1 is fixedly connected to the slide 41 via a blade fixing seat 11 and is located below the slide 41 .

[0044] How it works

[0045] When the three-pole double-throw relay is controlled to be in the normally open mode, pins 1 and 8 of the three-pole double-throw relay are connected, pins 2 and 6 are connected, and pins 3 and 4 are connected. At this time, after the power is connected, the current flows in the direction of the positive pole of the DC power supply>pin 6>pin 2>pin 1>pin 8>second conductive rod 52>slider 41>third conductive rod 53>positive pole of motor 2>negative pole of motor 2>pin 3>pin 4>negative pole of DC power supply. At this time, the motor 2 reverses, driving the slide 41 to move right, thereby driving the blade 1 to move right. When the slide 41 slides to the right limit point, the slide 41 enters the second insulating sleeve 5211 area of ​​the second conductive rod 52 (such as Figure 7 As shown), at this time, the second conductive rod 52 is disconnected from the slider 41, the power supply of the motor 2 is automatically disconnected, and the rotation is stopped, so that the slider 41 stops moving to the right, and the slider 41 stops at the right limit point.

[0046] When the three-pole double-throw relay is controlled to be in the normally closed mode, the relay pins 1 and 9 are connected, the pins 2 and 7 are connected, and the pins 3 and 5 are connected. At this time, after the power is connected, the current flows in the direction of the positive pole of the DC power supply>pin 5>pin 3>negative pole of motor 2>positive pole of motor 2>third conductive rod 53>slider 41>first conductive rod 51>pin 9>pin 1>pin 2>pin 7>negative pole of the DC power supply. At this time, the motor 2 rotates forward, driving the slide 41 to move to the left, thereby driving the blade 1 to move to the left. When the slide 41 slides to the left limit point, the slide 41 enters the first insulating sleeve 5111 area of ​​the first conductive rod 51 (such as Figure 6 As shown), at this time, the first conductive rod 51 is disconnected from the slider 41, the power supply of the motor 2 is automatically disconnected, and the rotation is stopped, so that the slider 41 stops moving to the left, and the slider 41 stops at the left limit point.

[0047] Therefore, it is only necessary to control the normally open or normally closed state of the three-pole double-throw relay to control the blade 1 to run to the right or left. When the blade 1 reaches the left limit point or the right limit point, the motor 2 will automatically cut off the power and stop. The whole process does not require left and right limit switches, and the stop process of the motor 2 when it reaches the left limit point or the right limit point is an automatic power-off stop, without the need for a controller to control the stop, which is safer.

[0048] Of course, in other embodiments, the reciprocating transmission device can also be used to drive other components, such as a scanning probe, a gas nozzle, etc., and is not limited to driving a blade.

[0049] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A reciprocating transmission device, characterized in that: The invention comprises a motor, a transmission mechanism, a moving assembly, a conductive rod, a bracket and a switching circuit. The conductive rod comprises a first conductive rod, a second conductive rod and a third conductive rod. The first conductive rod, the second conductive rod and the third conductive rod are fixedly arranged on the bracket and arranged at intervals from each other. The moving assembly is in movable electrical contact with the conductive rod. The motor is used to drive the transmission mechanism to drive the moving assembly to move back and forth along the axial direction of the conductive rod. The third conductive rod is electrically connected to the first conductive rod and the second conductive rod through the moving assembly. The switching circuit is used to switch the first conductive rod and the third conductive rod to be connected in series to the motor power supply circuit to form a forward power supply or the second conductive rod and the third conductive rod to be connected in series to the motor power supply circuit to form a reverse power supply. The axial direction of the conductive rod is defined as the left and right direction. The left end of the first conductive rod is provided with a first insulating limit portion. When the motor drives the transmission mechanism to drive the moving assembly to move to the left to the first insulating limit portion when the motor rotates forward, the first conductive rod is insulated from the moving assembly, the motor power supply circuit is disconnected, and the motor stops. The right end of the second conductive rod is provided with a second insulating limit portion. When the motor drives the transmission mechanism to drive the moving assembly to move to the right to the second insulating limit portion when the motor rotates reversely, the second conductive rod is insulated from the moving assembly, the motor power supply circuit is disconnected, and the motor stops.

2. The reciprocating transmission device according to claim 1, characterized in that: The conductive rod is made of metal material.

3. The reciprocating transmission device according to claim 2, characterized in that: The first insulating limiter is composed of a first insulating sleeve sleeved on the first conductive rod, and the second insulating limiter is composed of a second insulating sleeve sleeved on the second conductive rod.

4. The reciprocating transmission device according to claim 3, characterized in that: The outer circumference of the first insulating sleeve is flush with the outer circumference of the first conductive rod, and the outer circumference of the second insulating sleeve is flush with the outer circumference of the second conductive rod.

5. The reciprocating transmission device according to claim 1, characterized in that: The moving assembly includes a slider, which is made of metal material and has three through holes. The slider is slidably sleeved on the first conductive rod, the second conductive rod and the third conductive rod through the three through holes and is slidably electrically connected to the first conductive rod, the second conductive rod and the third conductive rod.

6. The reciprocating transmission device according to claim 5, characterized in that: A metal ball bearing is also fixed in the through hole, and the through hole is sleeved on the conductive rod through the ball bearing.

7. The reciprocating transmission device according to claim 1, characterized in that: The transmission mechanism is a belt transmission mechanism, and the moving component is fixed on the belt of the belt transmission mechanism.

8. The reciprocating transmission device according to claim 7, characterized in that: The transmission mechanism is arranged above the conductive rod.

9. The reciprocating transmission device according to claim 1, characterized in that: The switching circuit is implemented by a three-pole double-throw relay.

10. A reciprocating cutting device, characterized in that: It comprises the reciprocating transmission device and the blade as described in any one of claims 1 to 9, wherein the blade is fixed on the moving component through a blade fixing seat.

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