Electric cutting device

Abstract

The utility model provides an electric cutting device, and relates to the technical field of electric tools. An electric cutting device comprises a first cutting element and a second cutting element, and the first cutting element and the second cutting element are connected in a pivoted mode. The first holding part and the second holding part can move relatively, the first holding part comprises a first shell, a driving part and a transmission mechanism, the driving part and the transmission mechanism are arranged in the first shell, one end of the transmission mechanism is connected with the driving part, and the other end of the transmission mechanism is connected with the first cutting element; when the electric cutting device is used, the first holding part and the second holding part are close to each other, after the pressure on the second holding part reaches a preset value, the driving part drives the transmission mechanism to move, and the transmission mechanism drives the first cutting element to rotate in the direction close to the second cutting element. The electric cutting device has the manual and electric shear function, electric power assistance is automatically carried out, and therefore the electric cutting device can save more electricity and prolong the endurance.

Description

Technical Field

[0001] The utility model belongs to the technical field of power tools, and particularly relates to an electric cutting device. Background Art

[0002] Electric cutting devices, especially electric scissors, as a modern handheld cutting tool, integrate motor drive and precision mechanical design, providing users with efficient and labor-saving cutting solutions. They are widely used in many fields such as tailoring, textiles, gardening, handicrafts, and home decoration. Especially in scenarios that require a large amount of or continuous cutting operations, they show incomparable advantages.

[0003] Compared with traditional manual scissors, electric scissors are powered by batteries or power supplies, converting electrical energy into mechanical kinetic energy to drive the blades to perform reciprocating or rotating movements at high speeds, easily penetrating various materials, including fabrics, papers, leathers, tree branches, and even metal foils, ensuring smooth and precise cutting edges.

[0004] Common electric scissors often can only be used in electric mode or manual mode. For some users who hope to use the electric mode when cutting high-hardness items and the manual mode when cutting easily cut items to save power and increase the battery life of the electric scissors, they need to frequently adjust the switch on the electric scissors to switch modes, which is not very convenient to use. Summary of the Invention

[0005] The purpose of the utility model is to address the above problems existing in the prior art and propose an electric cutting device with a function of combining manual and electric scissors, which can perform manual cutting when cutting softer items and automatically provide electric assistance when cutting harder items.

[0006] The purpose of the utility model can be achieved by the following technical solutions: An electric cutting device, comprising:

[0007] A first cutting element and a second cutting element, the first cutting element and the second cutting element are pivotally connected;

[0008] A first holding part and a second holding part, the first holding part and the second holding part can move relative to each other. The first holding part includes a first housing, a driving component and a transmission mechanism arranged in the first housing. One end of the transmission mechanism is connected to the driving component, and the other end of the transmission mechanism is connected to the first cutting element;

[0009] Wherein, when the electric cutting device is in use, the first holding part and the second holding part approach each other. After the pressure on the second holding part reaches a preset value, the driving component drives the transmission mechanism to move, and the transmission mechanism drives the first cutting element to rotate towards the direction close to the second cutting element.

[0010] As a further improvement of the present utility model, the second holding part includes a second housing, a trigger and a switch disposed in the second housing, the trigger is rotatable relative to the second housing, the rotation angle of the trigger relative to the second housing is positively correlated with the pressure on the trigger, and when the pressure on the trigger reaches a preset value, the trigger triggers the switch.

[0011] As a further improvement of the present utility model, the second holding part further includes a first elastic member, one end of the first elastic member abuts against the second housing, and the other end of the first elastic member abuts against the trigger.

[0012] As a further improvement of the present utility model, the transmission mechanism includes a speed reducer, a clutch mechanism and a gear mechanism arranged in sequence, the speed reducer is connected to the driving component, and the gear mechanism is connected to the first cutting element.

[0013] As a further improvement of the present utility model, the clutch mechanism includes a first ratchet, a second ratchet and a second elastic member, and the second elastic member is arranged to make the second ratchet have a tendency to engage with the first ratchet.

[0014] As a further improvement of the present utility model, the clutch mechanism further includes a first transmission shaft and a first bearing, the first transmission shaft is inserted into the first bearing and the second ratchet, one end of the second elastic member abuts against the second ratchet, and the other end of the second elastic member abuts against the first bearing.

[0015] As a further improvement of the present utility model, the gear mechanism includes a first bevel gear, a second bevel gear, a second transmission shaft, a transmission gear and a swing gear, the first bevel gear meshes with the second bevel gear, the second transmission shaft is inserted into the second bevel gear, the transmission gear is arranged on the second transmission shaft, the transmission gear meshes with the swing gear, and the swing gear is connected to the first cutting element.

[0016] As a further improvement of the present utility model, it further includes a third elastic member, the third elastic member is disposed between the first holding part and the second holding part, and the third elastic member is arranged to make the first holding part and the second holding part have a tendency to move away from each other.

[0017] As a further improvement of the present utility model, it further includes a control board and a Hall element, and the control board is electrically connected to the Hall element, the switch and the driving component.

[0018] As a further improvement of the present utility model, a magnetic element is provided on the first cutting element. When the first cutting element rotates towards the second cutting element, the magnetic element approaches the Hall element. When the induction signal on the Hall element reaches a preset value, the control board controls the driving component to stop working.

[0019] Based on the above technical solutions, the present utility model can at least produce the following technical effects:

[0020] 1. By setting the function of manual and electric combination shearing in this electric cutting device, when cutting softer items, manual cutting is performed, and when cutting harder items, electric assistance is automatically provided, so that the electric cutting device can save more power during operation and increase the battery life of the electric cutting device.

[0021] 2. This electric cutting device has the function of stopping the knife at any position during the shearing process. When cutting to the position where the knife needs to be stopped, the user relaxes the pressure on the trigger. When the pressure on the trigger does not reach the preset value, the switch will be disconnected and the driving component will stop working.

[0022] 3. A first elastic member is provided in the second holding portion. By deforming the first elastic member, the trigger pressure of the electric assistance can be controlled, and the preset trigger pressure value of the electric assistance can be conveniently modified by replacing the first elastic members with different elastic coefficients.

[0023] 4. By setting the first ratchet and the second ratchet to engage, only the rotation in a specific direction will be transmitted by the clutch mechanism, and the rotation in the opposite direction will only cause the first ratchet and the second ratchet to slip, so that when the holding portion is reset, the motor will not be dragged backwards.

[0024] 5. By setting the second elastic member, the first ratchet and the second ratchet have a tendency to engage, and the power of the speed reducer is transmitted to the gear mechanism during shearing.

[0025] 6. By setting the third elastic member, the first holding portion and the second holding portion are reset after shearing is completed.

[0026] 7. By setting the Hall element and the magnetic element, when the first cutting element moves to the preset limit position, it will not move further, avoiding damage to the whole machine. Description of the Drawings

[0027] Figure 1 is a schematic diagram of the electric cutting device of the present utility model.

[0028] Figure 2 is a schematic diagram of the transmission mechanism in the electric cutting device of the present utility model.

[0029] Figure 3 is Figure 2 the A-A sectional view of

[0030] Figure 4 It is a schematic diagram when the first cutting element in the electric cutting device of the present utility model moves to the limit position.

[0031] Figure 5 It is Figure 4 A schematic diagram after removing the oscillating gear.

[0032] In the figure, 100 is the first cutting element; 200 is the second cutting element; 300 is the first holding part; 310 is the first housing; 320 is the driving component; 330 is the speed reducer; 340 is the clutch mechanism; 341 is the first ratchet; 342 is the second ratchet; 343 is the second elastic member; 344 is the first transmission shaft; 345 is the first bearing; 350 is the gear mechanism; 351 is the first bevel gear; 352 is the second bevel gear; 353 is the second transmission shaft; 354 is the transmission gear; 355 is the oscillating gear; 400 is the second holding part; 410 is the second housing; 420 is the trigger; 430 is the switch; 440 is the first elastic member; 500 is the third elastic member; 600 is the control board; 700 is the Hall element; 800 is the magnetic element. Detailed implementation manners

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly. In addition, in the present utility model, descriptions such as "first", "second", "one", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined. In the present utility model, unless otherwise clearly specified and defined, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical solutions between various embodiments of the present utility model can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0034] The following are specific embodiments of the present utility model, and in conjunction with the attached Figures 1-5 , the technical solution of the present utility model will be further described, but the present utility model is not limited to the following embodiments.

[0035] An electric cutting device, especially an electric scissor, includes: a first cutting element 100, a second cutting element 200, a first holding part 300, and a second holding part 400. The first cutting element 100 and the second cutting element 200 are pivotally connected. The first holding part 300 and the second holding part 400 can move relative to each other. The first holding part 300 includes a first housing 310, a driving component 320 and a transmission mechanism arranged in the first housing 310. One end of the transmission mechanism is connected to the driving component 320, and the other end of the transmission mechanism is connected to the first cutting element 100. When the electric cutting device is in use, the first holding part 300 and the second holding part 400 approach each other. After the pressure on the second holding part 400 reaches a preset value, the driving component 320 drives the transmission mechanism to move, and the transmission mechanism drives the first cutting element 100 to rotate in the direction close to the second cutting element 200.

[0036] It should be noted that in this embodiment, the first cutting element 100 is set as a moving blade, the second cutting element 200 is set as a stationary blade, and the driving component 320 is set as a motor. When the user holds this electric cutting device to perform shearing, if the item to be sheared is relatively soft, the pressure on the second holding part 400 does not reach the preset trigger pressure, then the motor will not operate to provide electric assistance, that is, the user performs manual shearing. And if the item to be sheared is relatively hard, the pressure on the second holding part 400 reaches the preset trigger pressure, and the motor operates to drive the moving blade to rotate towards the stationary blade through the transmission mechanism, that is, electric assistance is provided. The preset trigger pressure can be set according to actual needs. By setting the function of manual and electric combined shearing, when the item to be cut is relatively soft, manual cutting is performed, and when the item to be cut is relatively hard, electric assistance is automatically provided, so that this electric cutting device can save more power during operation and increase the battery life of this electric cutting device.

[0037] Specifically, the second holding part 400 includes a second housing 410, a trigger 420 and a switch 430 arranged in the second housing 410. The trigger 420 can rotate relative to the second housing 410. The rotation angle of the trigger 420 relative to the second housing 410 is positively correlated with the pressure on the trigger 420. When the pressure on the trigger 420 reaches a preset value, the trigger 420 triggers the switch 430. The second holding part 400 further includes a first elastic member 440. One end of the first elastic member 440 abuts against the second housing 410, and the other end of the first elastic member 440 abuts against the trigger 420.

[0038] It should be noted that in this embodiment, the switch 430 is set as a microswitch 430. The position of the switch 430 is arranged on the rotation path of the trigger 420 and close to the lower part of the trigger 420. The first elastic member 440 is set as a spring. The position of the first elastic member 440 is arranged on one side of the switch 430. The trigger 420 needs to overcome the elastic force of the first elastic member 440 during the rotation relative to the second housing 410. This electric cutting device controls the trigger pressure of the electric assistance through the deformation of the first elastic member 440. When the pressure on the trigger 420 reaches the preset pressure, the trigger 420 can compress the first elastic member 440 to a preset position to trigger the microswitch 430. Therefore, the preset trigger pressure value of the electric assistance can be conveniently modified by replacing the first elastic member 440 with different elastic coefficients. At the same time, this electric cutting device has the function of stopping the blade at any position during the shearing process. When shearing to the position where the blade needs to be stopped, the user relaxes the pressure on the trigger 420. When the pressure on the trigger 420 does not reach the preset value, the first elastic member 440 will push the trigger 420 to reset, so that the switch 430 cannot be triggered and the driving component 320 stops working.

[0039] Specifically, the transmission mechanism includes a speed reducer 330, a clutch mechanism 340, and a gear mechanism 350 arranged in sequence. The speed reducer 330 is connected to the driving component 320, and the gear mechanism 350 is connected to the first cutting element 100. The clutch mechanism 340 includes a first ratchet 341, a second ratchet 342, and a second elastic member 343. The second elastic member 343 is configured to make the second ratchet 342 tend to engage with the first ratchet 341. The clutch mechanism 340 further includes a first transmission shaft 344 and a first bearing 345. The first transmission shaft 344 is inserted into the first bearing 345 and the second ratchet 342. One end of the second elastic member 343 abuts against the second ratchet 342, and the other end of the second elastic member 343 abuts against the first bearing 345.

[0040] It should be noted that in this embodiment, the speed reducer 330 is a gear speed reducer, and the reduction ratio can be adjusted by changing the transmission ratio of the gear set according to actual needs. The first ratchet 341 and the second ratchet 342 in the clutch mechanism 340 are configured to only transmit rotation in a specific direction after meshing, and rotation in the opposite direction will cause the first ratchet 341 and the second ratchet 342 to slip relative to each other, avoiding the motor being dragged backward when the first holding portion 300 and the second holding portion 400 are reset after shearing. By setting the second elastic member 343, the first ratchet 341 and the second ratchet 342 have a tendency to mesh, and the power of the speed reducer 330 is transmitted to the gear mechanism 350 during shearing.

[0041] Furthermore, the gear mechanism 350 includes a first bevel gear 351, a second bevel gear 352, a second transmission shaft 353, a transmission gear 354, and a swing gear 355. The first bevel gear 351 meshes with the second bevel gear 352. The second transmission shaft 353 is inserted into the second bevel gear 352. The transmission gear 354 is arranged on the second transmission shaft 353. The transmission gear 354 meshes with the swing gear 355, and the swing gear 355 is connected to the first cutting element 100.

[0042] It should be noted that in this embodiment, the first bevel gear 351 and the first transmission shaft 344 are integrally provided, and the second transmission shaft 353 and the transmission gear 354 are integrally provided. In other embodiments, the first bevel gear 351 and the first transmission shaft 344 can also be separately provided, and the second transmission shaft 353 and the transmission gear 354 can also be separately provided. The first bevel gear 351 drives the second bevel gear 352 to rotate, the second bevel gear 352 drives the second transmission shaft 353 to rotate, the second transmission shaft 353 drives the transmission gear 354 to rotate, the transmission gear 354 drives the swing gear 355 to rotate, and the swing gear 355 drives the first cutting element 100 to move. By setting the gear mechanism 350, the rotation of the output shaft of the speed reducer 330 is converted into the movement of the first cutting element 100.

[0043] The electric cutting device further includes a third elastic member 500 disposed between the first holding portion 300 and the second holding portion 400, and the third elastic member 500 is configured to make the first holding portion 300 and the second holding portion 400 tend to move away from each other.

[0044] It should be noted that, in this embodiment, the third elastic member 500 is set as a spring, and in other embodiments, the third elastic member 500 can also be set as other parts that can achieve the same function. When the shearing is completed and the user releases the second holding portion 400, the second holding portion 400 will reset under the action of the third elastic member 500. Also, since the clutch mechanism 340 is configured to only transmit rotation in a specific direction, during the reset process, the second ratchet 342 will slip relative to the first ratchet 341 and will not transmit the rotation to the first ratchet 341, and a slight metallic friction sound will be generated by the clutch mechanism 340 during the reset process.

[0045] The electric cutting device further includes a control board 600, a Hall element 7000, and a battery. The battery is electrically connected to the control board 600, and the control board 600 is electrically connected to the Hall element 7000, the switch 430, and the driving component 320. There is 800 provided on the first cutting element 100. When the first cutting element 100 rotates in the direction approaching the second cutting element 200, 800 approaches the Hall element 7000. When the induction signal on the Hall element 7000 reaches a preset value, the control board 600 controls the driving component 320 to stop working. By providing the Hall element 7000 and 800, when the first cutting element 100 moves to the preset limit position, it will not move further, thus avoiding damage to the whole machine.

[0046] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to substitute, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An electric cutting device, characterized in that, Comprising: A first cutting element and a second cutting element, wherein the first cutting element and the second cutting element are pivotally connected; A first holding portion and a second holding portion, wherein the first holding portion and the second holding portion are relatively movable. The first holding portion includes a first housing, a driving component and a transmission mechanism disposed in the first housing. One end of the transmission mechanism is connected to the driving component, and the other end of the transmission mechanism is connected to the first cutting element; Wherein, when the electric cutting device is in use, the first holding portion and the second holding portion approach each other. After the pressure on the second holding portion reaches a preset value, the driving component drives the transmission mechanism to move, and the transmission mechanism drives the first cutting element to rotate in a direction close to the second cutting element.

2. The electric cutting device according to claim 1, characterized in that, The second holding portion includes a second housing, a trigger and a switch disposed in the second housing. The trigger is rotatable relative to the second housing, and the rotation angle of the trigger relative to the second housing is positively correlated with the pressure on the trigger. When the pressure on the trigger reaches a preset value, the trigger triggers the switch.

3. The electric cutting device according to claim 2, wherein, The second holding portion further includes a first elastic member, one end of the first elastic member abuts against the second housing, and the other end of the first elastic member abuts against the trigger.

4. The electric cutting device according to claim 1, wherein, The transmission mechanism includes a speed reducer, a clutch mechanism and a gear mechanism arranged in sequence. The speed reducer is connected to the driving component, and the gear mechanism is connected to the first cutting element.

5. The electric cutting device according to claim 4, characterized in that, The clutch mechanism includes a first ratchet, a second ratchet and a second elastic member. The second elastic member is configured to make the second ratchet have a tendency to engage with the first ratchet.

6. The electric cutting device according to claim 5, wherein The clutch mechanism further includes a first transmission shaft and a first bearing. The first transmission shaft is inserted into the first bearing and the second ratchet. One end of the second elastic member abuts against the second ratchet, and the other end of the second elastic member abuts against the first bearing.

7. The electric cutting device according to claim 4, characterized in that, The gear mechanism includes a first bevel gear, a second bevel gear, a second transmission shaft, a transmission gear and a swing gear. The first bevel gear and the second bevel gear mesh with each other. The second transmission shaft is inserted into the second bevel gear. The transmission gear is arranged on the second transmission shaft. The transmission gear meshes with the swing gear, and the swing gear is connected to the first cutting element.

8. The electric cutting device according to claim 1, characterized in that, It further includes a third elastic member, and the third elastic member is disposed between the first holding portion and the second holding portion. The third elastic member is configured to make the first holding portion and the second holding portion have a tendency to move away from each other.

9. The electric cutting device according to claim 2, characterized in that It further includes a control board and a Hall element. The control board is electrically connected to the Hall element, the switch and the driving component.

10. The electric cutting device according to claim 9, characterized in that, A magnetic element is disposed on the first cutting element. When the first cutting element rotates in a direction close to the second cutting element, the magnetic element approaches the Hall element. When the induction signal on the Hall element reaches a preset value, the control board controls the driving component to stop working.

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