Interlocking mechanism for electric machine tool and electric machine tool

Abstract

The invention discloses an interlocking mechanism for an electric machine tool, which is arranged in a shell (100) of the electric machine tool, and comprises an adjusting element (1) for adjusting a tool head; the trigger (5) is used for starting the electric machine tool; the change-over switch (4) is provided with a first stop part (41) matched with the adjusting element and a second stop part (42) matched with a trigger; when the change-over switch is located at a first station, the first stop part (41) does not interfere with the adjusting element, and the second stop part (42) interferes with the trigger. When external force is applied to the change-over switch to enable the change-over switch to be switched from the first station to the second station, the first stop part (41) interferes with the adjusting element, and the second stop part (42) does not interfere with the trigger.

Description

Technical Field

[0001] The present invention relates to a locking device, and particularly to a locking device for a power tool machine. Background Art

[0002] For a power tool machine, such as an electric circular saw, during its use, the cutting tool needs to be adjusted to adapt to different working conditions and materials.

[0003] For example, in patent document CN108422493A, an operating element is disclosed, which can adjust the cutting parameters of a saw blade through a transmission unit.

[0004] However, the problem is that during use, when the operator touches the trigger to make the electric circular saw run, the adjustment element for adjusting the cutting parameters of the saw blade may also be triggered, resulting in changes in the cutting parameters and state of the saw blade during operation, and further leading to inaccurate cutting or unstable running state of the electric circular saw.

[0005] Or, when adjusting the cutting parameters of the saw blade, the trigger of the power tool machine is accidentally triggered, resulting in the sudden start of the power tool machine, thus bringing potential safety hazards. Summary of the Invention

[0006] One object of the present invention is to provide an interlocking mechanism for a power tool machine, which can achieve interlocking between the start trigger of the power tool machine and the tool head adjustment element of the power tool machine, that is, when the motor is triggered to operate, the tool head cannot be adjusted, and when the tool head is adjusted, the power tool machine cannot start working due to accidental triggering, thereby ensuring the safety and stability of the operation of the power tool machine.

[0007] To achieve the above object, the present invention provides an interlocking mechanism for a power tool machine, which is arranged inside the housing of the power tool machine, and the interlocking mechanism includes:

[0008] An adjustment element, which is configured to move the adjustment element to adjust the tool head of the power tool machine;

[0009] A trigger, which is configured to press the trigger to start the power tool machine;

[0010] A changeover switch is provided with a first stop portion adapted to the adjusting element and a second stop portion adapted to the trigger; wherein when the changeover switch is in the first working position, the first stop portion does not interfere with the adjusting element, and the second stop portion interferes with the trigger to prevent the trigger from being pressed; when an external force is applied to the changeover switch to move the changeover switch from the first working position to the second working position, the first stop portion interferes with the adjusting element to prevent the movement of the adjusting element, and the second stop portion does not interfere with the trigger.

[0011] Another object of the present invention is to provide a power tool machine, which has higher operation safety and operation stability and a good use experience.

[0012] Based on this, the present invention also provides a power tool machine, which includes the interlocking mechanism as described above.

[0013] The interlocking mechanism for a power tool machine according to the present invention can effectively realize the interlocking between the starting trigger of the power tool machine and the tool head adjusting element of the power tool machine, that is, when the motor is triggered to perform an operating operation, the tool head cannot be adjusted, and when the tool head is adjusted, the power tool machine cannot start working due to accidental triggering, thereby ensuring the operation safety and stability of the power tool machine and improving the use experience of the operator. Description of the Drawings

[0014] Figure 1 Schematically shows a power tool machine to which the present invention is applicable, such as a circular saw.

[0015] Figure 2 Partially shows the state in which the interlocking mechanism for a power tool machine according to the present invention is arranged in the housing of the power tool machine.

[0016] Figure 3 Shows a schematic structural view of the interlocking mechanism for a power tool machine according to the present invention in a first working position in an embodiment.

[0017] Figure 4 Shows the state of the interlocking mechanism for a power tool machine according to the present invention in a first working position in an embodiment from a top view perspective.

[0018] Figure 5 Shows a schematic structural view of the interlocking mechanism for a power tool machine according to the present invention in a second working position in an embodiment.

[0019] Figure 6 Shows the state of the interlocking mechanism for a power tool machine according to the present invention in a second working position in an embodiment from a top view perspective.

[0020] Figure 7 Shows a schematic structural diagram of a change-over switch of the interlocking mechanism for a power tool according to the present invention in an embodiment.

[0021] Figure 8 Shows a schematic structural diagram of an adjusting element of the interlocking mechanism for a power tool according to the present invention in an embodiment from a top-down perspective.

[0022] Figure 9 Shows the state when the trigger is pressed of the interlocking mechanism for a power tool according to the present invention in an embodiment from a top-down perspective.

[0023] Figure 10 Partially schematically shows a first chute and a chip removal groove of the interlocking mechanism for a power tool according to the present invention in an embodiment. Detailed implementation mode

[0024] The following will further explain and illustrate the interlocking mechanism for a power tool and the power tool according to the present invention in conjunction with the accompanying drawings of the specification and specific embodiments. However, this explanation and illustration do not unduly limit the technical solution of the present invention.

[0025] Figure 1 Schematically shows a power tool to which the present invention is applicable, such as a circular saw.

[0026] As Figure 1 shown, for a power tool, especially a circular saw, it drives a tool head, such as a saw blade 3, through a motor to cut the material to be cut. During the use of this circular saw, in order to adapt to different operating objects and operating requirements, it is often necessary to adjust the saw blade 3, such as adjusting the cutting depth or adjusting the cutting angle.

[0027] For example, in the patent document CN108422493A, a device for adjusting the saw blade 3 is introduced in detail. By applying an external force to push and pull the adjusting element 1 in the operating direction, the transmission of force and movement is realized through the transmission element 2, thereby realizing the adjustment of the saw blade 3.

[0028] Since how to adjust the tool head, such as the saw blade, through the adjusting element has been introduced in detail in the existing references and it is not an improvement point of the present invention, it will not be elaborated herein. Those skilled in the art can know how to adjust the saw blade through the published references, such as CN108422493A.

[0029] The technical problem to be solved by the present invention is that during the use of a power tool, such as a circular saw, when the operator touches the trigger to make the circular saw operate, the adjusting element for adjusting the saw blade may also be accidentally triggered, resulting in a change in the cutting parameters of the saw blade during operation, and further causing inaccurate cutting or unstable operating state of the electric circular saw. Or, when adjusting the cutting parameters of the saw blade, the trigger of the power tool is accidentally triggered, resulting in the sudden start of the power tool, thus bringing potential safety hazards.

[0030] To solve the above problems, in one embodiment, the present invention provides an interlock mechanism for a power tool, as Figure 2 shown, which is disposed inside the housing 100 of the power tool and is designed to achieve the interlock between the adjusting element and the trigger.

[0031] Figure 3 Fig. shows a schematic structural view of the interlock mechanism for a power tool according to the present invention at a first working position in one embodiment.

[0032] As Figure 3 shown, the interlock mechanism may include: an adjusting element 1 connected to the tool head of the power tool through a transmission element 2 (not fully shown), a trigger 5 for turning on and off the power tool, and a changeover switch 4 (e.g., through a groove inside the housing of the power tool) disposed between the adjusting element 1 and the trigger 5.

[0033] In some embodiments, the movement (or "displacement") of the adjusting element 1 along the first direction F1 is used to adjust the tool head, such as the cutting depth of the tool head.

[0034] Figure 4 Fig. shows the state of the interlock mechanism for a power tool according to the present invention at a first working position from a top view perspective.

[0035] As Figure 3 and Figure 4 shown, in some embodiments, the changeover switch 4 is provided with a first stop portion 41 adapted to the adjusting element 1 and a second stop portion 42 adapted to the trigger 5; when the changeover switch 4 is in the first working position as Figure 3 shown, the first stop portion 41 does not interfere with the adjusting element 1, thus not blocking the movement of the adjusting element 1 along the first direction F1, enabling the adjusting element 1 to perform its function of adjusting the tool head. However, in this first working position, the second stop portion 42 interferes with the trigger 5, making the trigger 5 unable to move in the second direction F2, that is, unable to be pressed towards the changeover switch 4, and thus unable to start the power tool.

[0036] Figure 5Shows a schematic structural view of the interlock mechanism for a power tool in accordance with the present invention in a second working position in one embodiment.

[0037] Figure 6 Shows the state of the interlock mechanism for a power tool in accordance with the present invention in a second working position in one embodiment from a top-down perspective.

[0038] As Figure 5 and Figure 6 shown, when an external force is applied to the changeover switch, for example, when an external force is applied such that the changeover switch moves in a third direction F3 along a groove on the inner wall of the housing of the power tool, for example, when the changeover switch 4 is pressed inward towards the housing ( Figure 5 in the direction perpendicular to the plane of the paper shown), the changeover switch 4 switches from the first working position to the second working position as shown in Figure 6 . At this time, the first stop portion 41 blocks a part of the adjusting element 1 (as shown in Figure 6 ), thereby interfering with the adjusting element 1, causing the adjusting element 1 to be unable to move in the first direction F1, and thus the tool head cannot be adjusted. At the same time, the second stop portion 42 no longer interferes with the trigger 5, so that the trigger 5 can act in the second direction F2 to start the power tool.

[0039] Figure 7 Shows a schematic structural view of the changeover switch of the interlock mechanism for a power tool in accordance with the present invention in one embodiment.

[0040] Figure 8 Shows a schematic structural view of the adjusting element of the interlock mechanism for a power tool in accordance with the present invention in one embodiment from a top-down perspective.

[0041] In some more specific embodiments, the first stop portion 41 of the changeover switch 4 includes a first arm extending towards the adjusting element. Correspondingly, as shown in Figure 8 , the adjusting element is provided with an extending arm 11 extending towards the changeover switch. In the first working position of the changeover switch, the first arm and the extending arm 11 are misaligned, that is, the first arm is located at the groove 14 of the adjusting element, so as not to block the extending arm. In the second working position of the changeover switch, the first arm blocks the extending arm 11 to prevent the adjusting element from moving in the first direction.

[0042] As Figure 8 shown, in some embodiments, the adjusting element 1 is provided with two extending arms 11 for the purpose that: when the changeover switch 4 moves in the two arrow-pointing directions of F3 as shown in Figure 4 , the first stop portion 41 can block the extending arm.

[0043] As described above, the changeover switch 4 is arranged within the housing 100 by means of a groove on the inner wall. The changeover switch 4 has a pressing part that is exposed on the surface of the housing 100. In accordance with Figure 4 and Figure 8 the setting method, as long as the changeover switch 4 is pressed towards the interior of the housing 100 in the direction shown by F3, regardless of which direction of the two arrows of F3 is pressed, the blocking of one of the two extension arms by the first blocking part 41 can be achieved.

[0044] Of course, in other embodiments, only one extension arm 11 may be provided.

[0045] In some more specific embodiments, the transmission element for realizing the adjustment of the tool head may include a pulling rope. In this case, when the adjustment of the tool head is required, the adjusting element needs to pull the pulling rope. Therefore, the adjusting element needs to move in the direction of F1 as shown in Figure 3 (i.e., the obliquely upward direction in Figure 3 ). Therefore, in order to block the movement of the adjusting element, at the second working position of the changeover switch, the first arm is arranged above rather than below the extension arm 11 to block the extension arm.

[0046] Of course, in other embodiments, if the adjustment of the tool head is achieved by the adjusting element moving in a direction opposite to F1, or moving in other directions, the first stop part may not be arranged above the extension arm, but in other corresponding directions to block the movement path of the adjusting element.

[0047] In some preferred embodiments, as shown in Figure 3 and Figure 5 , the interlocking mechanism further includes a first elastic element 6, which is arranged between the adjusting element 1 and the inner wall of the housing 100 of the power tool (as shown in Figure 2 ). The first elastic element 6 is used to apply a reset elastic force to the adjusting element 1. As shown in Figure 3 , when the adjusting element is in the adjustment function, the first elastic element 6 is compressed. Therefore, when the external force applied to the adjusting element 1 is removed, the adjusting element 1 will move in the direction opposite to the first direction under the action of the reset elastic force to achieve reset.

[0048] In some more specific embodiments, a pin 12 protruding towards the first direction is provided on the adjusting element 1. The first elastic element 6 may include a first helical spring, and the first helical spring is arranged on the adjusting element 1 by sleeving on the pin 12.

[0049] Of course, in other embodiments, the first elastic element may also be a disc spring, a torsion spring, a leaf spring or a similar component that applies an elastic force.

[0050] Continue to refer toFigure 4 and Figure 6 , in some embodiments, the second stop portion 42 of the change-over switch 4 includes a second arm extending towards the trigger 5. Correspondingly, a third stop portion 51 is also provided on the trigger 5.

[0051] Among them, in the second working position as shown in Figure 6 , the second arm of the change-over switch is arranged in a dislocation manner with the third stop portion 51, so that the trigger 5 can be pressed towards the change-over switch, as shown in Figure 9 , thereby realizing the start of the power tool.

[0052] As shown in Figure 4 , in the first working position of the change-over switch, the second arm blocks the third stop portion 51 to prevent the trigger from being pressed towards the change-over switch.

[0053] In some preferred embodiments, as shown in Figure 4 and Figure 6 , the interlock mechanism may further include: a second elastic element 7, which is arranged between the change-over switch 4 and the inner wall of the housing 100 of the power tool, and applies a reset elastic force to the change-over switch 4 in a direction opposite to the third direction.

[0054] In some more specific embodiments, as shown in Figure 4 and Figure 6 , the second elastic element 7 is arranged in the accommodation groove 43 of the change-over switch 4.

[0055] As shown in Figure 3 and Figure 5 , a part of the second elastic element 7 is arranged in the accommodation groove, and the top extends out of the accommodation groove, so that it can contact the inner wall of the housing 100.

[0056] In some more specific embodiments, the second elastic element 7 includes a second helical spring.

[0057] Of course, in other embodiments, the second elastic element may also be a disc spring, a torsion spring, a reed or a similar component applying an elastic force.

[0058] Figure 10 Schematically shows the first chute and the chip removal groove of the interlock mechanism for a power tool according to the present invention in one embodiment.

[0059] As shown in Figure 10As shown, in some embodiments of the present invention, a first chute 101 is provided inside the housing 100, and an adjusting element (not shown in the figure) can move along the first chute 101 in the first direction F1 and the direction F11 opposite to the first direction. The chip discharge groove 102 communicates with the first chute 101, but has a different extending direction. The chip discharge groove 102 is provided on the path where the adjusting element moves along the direction F11 opposite to the first direction.

[0060] The chip discharge groove 102 is provided because: during the use of the electric tool machine, the chips generated by cutting the material often splash into the first chute 101, resulting in jamming or blocking of the sliding of the adjusting element, and further causing the adjusting element to be unable to reset to the initial position in the free state. In the preferred embodiment of the present invention, by providing the chip discharge groove 102, when the adjusting element 1 resets along the direction F11, it can push the chips remaining in the first chute 101 into the chip discharge groove 102 and discharge them from the opening 1021, thereby greatly reducing the possibility of the adjusting element being jammed.

[0061] In some more preferred embodiments, as Figure 8 shown, both sides of the adjusting element 1 have protruding protrusions 13, which are not only used to cooperate with the first chute 101, so that the adjusting element can slide relative to the housing along the first chute 101, but also the protrusions 13 can more conveniently and effectively push the chips in the first chute 101 during the process of the adjusting element resetting and sliding along the direction F11, and push them into the chip discharge groove 102.

[0062] In some more specific embodiments, the chip discharge groove 102 and the first chute 101 have an angle greater than or equal to 90°. Compared with an acute angle, the obtuse or right angle between the chip discharge groove 102 and the first chute 101 has a better chip discharge effect. And, compared with a right angle, the obtuse angle between the chip discharge groove 102 and the first chute 101 has a better chip discharge effect.

[0063] It should be noted that since the present invention aims to solve the interlock between the adjusting element and the trigger, no matter what parameters of the tool head the adjusting element specifically adjusts, such as cutting depth, cutting angle, it is within the protection scope of the present invention.

[0064] In one embodiment of the present invention, an electric tool machine is also provided, which has the interlock mechanism as described above. By setting the interlock mechanism, the electric tool machine achieves higher operation safety and operation stability.

[0065] In some more specific embodiments, the electric tool machine can be a circular saw.

[0066] It should be noted that the present invention adopts the description method of "first direction", "second direction" and "third direction" to illustrate that the "first direction", "second direction" and "third direction" are different directions from each other, and is not a limitation of the technical solution of the present invention. Therefore, F1, F2 and F3 shown in the drawings of the specification are also exemplary and are not intended to limit the present invention.

[0067] It should be noted that the prior art in the protection scope of the present invention is not limited to the embodiments given in the present application documents. All prior art that does not contradict the solutions of the present invention, including but not limited to prior patent documents, prior public publications, prior public uses, etc., can be included in the protection scope of the present invention.

[0068] In addition, the combination of the various technical features in this case is not limited to the combination described in the claims of this case or the combination described in the specific embodiments. All technical features recorded in this case can be freely combined or combined in any way unless there is a contradiction between them.

[0069] It should also be noted that the above-listed embodiments are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and similar changes or modifications made therewith can be directly derived or easily associated with by those skilled in the art from the contents disclosed in the present invention, and all should belong to the protection scope of the present invention.

Claims

1. An interlocking mechanism for a power tool machine, which is arranged inside a housing (100) of the power tool machine, characterized in that, The interlocking mechanism includes: An adjusting element (1) configured to move the adjusting element to adjust the tool head of the power tool. A trigger (5) configured to press the trigger to turn on the power tool. A changeover switch (4) provided with a first stop portion (41) adapted to the adjusting element and a second stop portion (42) adapted to the trigger; wherein when the changeover switch is in the first working position, the first stop portion (41) does not interfere with the adjusting element, and the second stop portion (42) interferes with the trigger to prevent the trigger from being pressed; when an external force is applied to the changeover switch to move the changeover switch from the first working position to the second working position, the first stop portion (41) interferes with the adjusting element to prevent the movement of the adjusting element, and the second stop portion (42) does not interfere with the trigger.

2. The interlocking mechanism according to claim 1, characterized in that, The first stop portion (41) includes a first arm extending towards the adjusting element (1), and an extension arm (11) extending towards the changeover switch is provided on the adjusting element (1), wherein in the first working position of the changeover switch, the first arm and the extension arm (11) are arranged in a dislocation manner; in the second working position of the changeover switch, the first arm blocks the extension arm (11) to prevent the adjusting element from moving in the first direction.

3. The interlocking mechanism according to claim 2, wherein, Further included is: A first elastic element (6) disposed between the adjusting element (1) and the inner wall of the housing of the power tool, and applying a reset elastic force to the adjusting element (1) in a direction opposite to the first direction.

4. The interlocking mechanism according to claim 3, characterized in that, A pin (12) protruding outward is provided on the adjusting element, and the first elastic element includes a first helical spring sleeved on the pin (12).

5. The interlocking mechanism according to claim 1, wherein The second stop portion (42) includes a second arm extending towards the trigger (5), and a third stop portion (51) is provided on the trigger; wherein in the second working position of the changeover switch, the second arm and the third stop portion (51) are arranged in a dislocation manner; in the first working position of the changeover switch, the second arm blocks the third stop portion (51) to prevent the trigger from being pressed.

6. The interlocking mechanism according to claim 1, wherein, Further included is: A second elastic element (7) disposed between the changeover switch (4) and the inner wall of the housing of the power tool to apply a reset elastic force to the changeover switch.

7. The interlocking mechanism according to claim 6, characterized in that, A receiving groove (43) is provided on the changeover switch, and the second elastic element includes a second helical spring disposed in the receiving groove (43).

8. The interlocking mechanism according to claim 1, characterized in that, A first sliding groove (101) is provided in the housing, and the adjusting element (1) can move along the first sliding groove (101) in the first direction and the direction opposite to the first direction; a chip discharging groove (102) communicating with the first sliding groove (101) is further provided in the housing, which is arranged on the path of the adjusting element moving in the direction opposite to the first direction, and the tail end of the chip discharging groove has an opening (1021).

9. The interlocking mechanism according to claim 8, wherein, A protruding portion (13) protruding outward is provided on the adjusting element, and the protruding portion (13) is adapted to the first sliding groove.

10. The interlocking mechanism according to claim 8, characterized in that, The chip discharging groove (102) and the first sliding groove (101) have an included angle greater than or equal to 90°.

11. An electric power tool, characterized in that, It includes the interlocking mechanism according to any one of claims 1-10.

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