High branch machine with safety protection function

Abstract

The application provides a high branch machine with a safety protection function, which comprises a shell, a rotating sleeve, a connecting sleeve, a transmission rod, a saw blade assembly, a driving assembly, a trigger switch and a button; the rotating sleeve is inserted into the front end of the shell, one end of the connecting sleeve is inserted into the rotating sleeve and fixed with the rotating sleeve, the other end of the connecting sleeve is fixed with the saw blade assembly, the driving assembly is fixed in the shell, one end of the transmission rod is in transmission connection with the driving end of the driving assembly, and the other end of the transmission rod is in transmission connection with the saw blade in the saw blade assembly; the trigger switch is fixed in the shell, the button is rotatably connected to the shell, a first spring is arranged between the rear end of the button and the shell, a limiting structure is arranged between the rotating sleeve and the shell, and when the rotating sleeve and the shell are not locked by the limiting structure, the limiting structure is used for limiting the rotation of the button to avoid the trigger end of the trigger switch being triggered by mistake; the application can avoid the accidental start of the high branch machine and eliminate the safety hazard.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high branch machine, in particular to a high branch machine with safety protection function. BACKGROUND

[0002] The high branch machine is a device for pruning branches located at high places. The high branch machine on the market mainly comprises a shell, a rotating sleeve, a connecting sleeve, a transmission rod, a saw blade assembly, a driving assembly, a trigger switch and a button. The rotating sleeve is inserted into the front end of the shell and can rotate relative to the shell. One end of the connecting sleeve is inserted into the rotating sleeve and fixed with the rotating sleeve, and the other end of the connecting sleeve is fixed with the saw blade assembly. The driving assembly is fixed inside the shell. The transmission rod is arranged inside the connecting sleeve. One end of the transmission rod is in transmission connection with the driving end of the driving assembly, and the other end of the transmission rod is in transmission connection with the saw blade in the saw blade assembly. The trigger switch is fixed inside the shell. The driving assembly is in electrical connection with the power line in series with the trigger switch. The button is rotatably connected to the shell. A first spring is arranged between the rear end of the button and the shell. When the rear end of the button is pressed to rotate the button relative to the shell, the front end of the button can push the trigger end of the trigger switch to make the trigger switch conductive. At this time, the driving assembly can be connected to the power supply, and the driving assembly can drive the saw blade in the saw blade assembly to move through the transmission rod. In the above-mentioned existing high branch machine structure, when the rotating sleeve is rotated and the rotating sleeve drives the saw blade assembly to rotate through the connecting sleeve, the direction of the saw blade assembly can be adjusted. However, during the adjustment of the direction of the saw blade assembly, even if the direction of the saw blade assembly is not adjusted to the set state, the user can still make the trigger switch conductive by pressing the button, so that the high branch machine may be started accidentally, that is, there is a great safety hazard. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a high branch machine with safety protection function, which can avoid accidental start of the high branch machine and eliminate safety hazards.

[0004] The application provides a high branch machine with a safety protection function, comprising a shell, a rotating sleeve, a connecting sleeve, a transmission rod, a saw blade assembly, a driving assembly, a trigger switch and a button; the rotating sleeve is inserted into the front end of the shell and can rotate relative to the shell, one end of the connecting sleeve is inserted into the rotating sleeve and fixed with the rotating sleeve, the other end of the connecting sleeve is fixed with the saw blade assembly, the driving assembly is fixed inside the shell, the transmission rod is arranged on the inner side of the connecting sleeve, one end of the transmission rod is in transmission connection with the driving end of the driving assembly, and the other end of the transmission rod is in transmission connection with the saw blade in the saw blade assembly; the trigger switch is fixed inside the shell, the driving assembly is in electrical connection with the power line in series with the trigger switch, the button is rotatably connected to the shell, and a first spring is arranged between the rear end of the button and the shell; when the rear end of the button is pressed to rotate the button relative to the shell, the front end of the button is used to push the trigger end of the trigger switch to make the trigger switch conductive; a limiting structure is arranged between the rotating sleeve and the shell; when the rotating sleeve drives the saw blade assembly to rotate through the connecting sleeve to adjust the direction of the saw blade assembly, the limiting structure is used to lock the rotating sleeve and the shell to limit the free rotation of the rotating sleeve relative to the shell; when the rotating sleeve and the shell are not locked by the limiting structure, the limiting structure is used to limit the rotation of the button to avoid the trigger end of the trigger switch being triggered by mistake.

[0005] By arranging the limiting structure between the rotating sleeve and the shell, when the rotating sleeve drives the saw blade assembly to rotate through the connecting sleeve to adjust the direction of the saw blade assembly, if the rotating sleeve and the shell are not locked by the limiting structure, the limiting structure can limit the rotation of the button to avoid the trigger end of the trigger switch being triggered by mistake, so that the accidental start of the high branch machine can be avoided, and the safety hazard is eliminated.

[0006] In a possible implementation, the limiting structure comprises a knob and a push knob; the knob is slidably connected to the side wall of the front end of the rotating sleeve, a first insertion rod is arranged on the rear end of the knob, a plurality of first insertion slots are arranged on the front end of the shell in a circumferential interval, a second spring is arranged between the knob and the rotating sleeve, the second spring is used to apply a spring force to the knob to drive the knob to slide backward, so that the first insertion rod is matched and inserted with one of the first insertion slots to lock the rotating sleeve and the shell; the push knob is slidably connected to the top of the shell, a second insertion rod is arranged on the front end of the push knob, a plurality of second insertion slots are arranged on the rear end of the rotating sleeve in a circumferential interval; when the first insertion rod is matched and inserted with one of the first insertion slots to lock the rotating sleeve and the shell, one of the second insertion slots is horizontally aligned with the second insertion rod and is used for horizontal insertion of the second insertion rod; a third spring is arranged between the push knob and the shell, the third spring is used to apply a spring force to the push knob to drive the push knob to slide backward, so that the second insertion rod is separated from the second insertion slot; a abutting portion is arranged on the bottom of the rear end of the push knob; when the push knob slides backward, the abutting portion is used to abut against the top of the rear end of the button and limit the rotation of the button to avoid mis-triggering of the trigger end of the trigger switch; by using the above limiting structure, when the direction of the saw blade assembly needs to be adjusted, the knob is pushed to make the first insertion rod separate from the first insertion slot, at this time, the rotating sleeve can rotate relative to the shell, since one end of the connecting sleeve is inserted into the rotating sleeve and fixed with the rotating sleeve, and the other end of the connecting sleeve is fixed with the saw blade assembly, when the rotating sleeve rotates, the saw blade assembly can be driven to rotate through the connecting sleeve, that is, the direction of the saw blade assembly is adjusted; after the saw blade assembly is adjusted in direction by the rotating sleeve through the connecting sleeve, the knob is released, at this time, the knob can slide backward relative to the rotating sleeve under the action of the spring force of the second spring, and then the first insertion rod can be matched and inserted with one of the first insertion slots in the corresponding position to lock the rotating sleeve and the shell; after the first insertion rod is matched and inserted with one of the first insertion slots in the corresponding position to lock the rotating sleeve and the shell, one of the second insertion slots can be horizontally aligned with the second insertion rod, at this time, the user can push the push knob to make the push knob slide forward relative to the shell (the second insertion rod on the push knob can be inserted into the second insertion slot in the corresponding position), after the push knob is pushed forward, the abutting portion on the push knob can be out of the abutting state with the top of the rear end of the button, so that the rotation limiting state of the button can be released, at this time, the user can press the rear end of the button and make the button rotate, after the button rotates, the front end of the button can push the trigger end of the trigger switch to make the trigger switch conductive, so that the driving assembly can drive the saw blade in the saw blade assembly to rotate through the transmission rod.In the above process, when the rotating sleeve is rotated and the saw blade assembly is rotated by the rotating sleeve through the connecting sleeve, if the rotating sleeve is not rotated to the set direction, i.e., the saw blade assembly is not rotated to the set direction, after the knob is released, the first inserting rod cannot be matched and inserted with any one first inserting slot to lock the rotating sleeve and the shell, at this time, the second inserting rod on the push-torque cannot be horizontally aligned with any one second inserting slot, i.e., the second inserting rod on the push-torque is in the state of abutting against the rear end of the rotating sleeve and cannot be pushed forward, at this time, the abutting part on the push-torque is in the state of abutting against the top of the rear end of the button, thereby the rotation of the button can be limited to avoid the button causing the trigger end of the trigger switch to be triggered by mistake, i.e., the accidental start of the pole pruner can be avoided, and the safety hazard is eliminated; after the above structure is adopted, it is also explained that when the rotating sleeve and the shell are not locked by the limiting structure (the direction of the saw blade assembly is not adjusted to the set direction), the limiting structure can limit the rotation of the button to avoid the button causing the trigger end of the trigger switch to be triggered by mistake, thereby the accidental start of the pole pruner can be avoided; in addition, it should be noted that after the first inserting rod is matched and inserted with one first inserting slot at the corresponding position to lock the rotating sleeve and the shell, and after the push-torque is pushed forward (one second inserting slot can be horizontally aligned with the second inserting rod at this time, at this time, the user can push the push-torque to make the push-torque slide forward relative to the shell, and make the second inserting rod on the push-torque inserted into the second inserting slot at the corresponding position), the abutting part on the push-torque can be released from the abutting state with the top of the rear end of the button, thereby the rotation limiting state of the button can be released, at this time, the user can press the rear end of the button and make the button rotate, after the button is rotated, the front end of the button can push the trigger end of the trigger switch to make the trigger switch conduct, i.e., the pole pruner can work under power; under the working state of the pole pruner under power, i.e., under the condition that the button is pressed, even if the push-torque is released, the abutting part on the push-torque can be in the abutting state with the inner wall of the rear end of the button, i.e., under the state that the button is pressed, the push-torque cannot slide back to reset under the action of the third spring, thereby the second inserting rod can be kept in the state of being inserted into the corresponding second inserting slot, at this time, the rotating sleeve is in the state of being rotated and locked by the push-torque, under this state, even if the knob is forwardly pushed to make the first inserting rod disengaged from the first inserting slot, the rotating sleeve cannot be rotated relative to the shell, thereby the direction of the saw blade assembly cannot be adjusted when the pole pruner works, the safety of the pole pruner in use is ensured; after the above structure is adopted, the button, the rotating sleeve, the push-torque and the button can achieve the interlocking purpose, i.e., when the direction of the saw blade assembly is not adjusted to the set direction, the pole pruner cannot work, when the pole pruner works, the direction of the saw blade assembly cannot be adjusted, thereby the safety of the pole pruner in use is ensured.

[0007] In a possible implementation, the rear end of the push-torque is provided with a ring-shaped sleeve part which is sleeved outside the connecting sleeve and can slide along the axial direction of the connecting sleeve, and the abutting part is arranged at the bottom of the sleeve part; after the ring-shaped sleeve part is arranged at the rear end of the push-torque, since the sleeve part is sleeved outside the connecting sleeve and can slide along the axial direction of the connecting sleeve, the sliding of the push-torque can be smoother when the finger pushes the push-torque, that is, the pushing of the push-torque can be facilitated.

[0008] In a possible implementation, the outer end surface of the knob is formed as an arc-shaped concave surface which gradually inclines towards the inside from front to back; after the outer end surface of the knob is formed as the arc-shaped concave surface which gradually inclines towards the inside from front to back, the finger can abut against the arc-shaped concave surface when the finger pushes the knob, so that the anti-disengagement effect of the finger and the knob can be improved, that is, the finger can more reliably push the knob.

[0009] In a possible implementation, the top of the rear end of the push-torque is provided with a step part which is used to abut against the finger to facilitate the forward pushing of the push-torque by the finger; after the step part is arranged at the top of the rear end of the push-torque, the step part can abut against the finger when the push-torque needs to be pushed, so that the anti-disengagement effect between the finger and the push-torque can be improved, that is, the process of pushing the push-torque by the finger can be facilitated, and the reliability of pushing the push-torque by the finger can be improved.

[0010] In a possible implementation, the middle part of the button is provided with a pair of shaft holes, and a pair of supporting shafts are arranged on the inner wall of the shell, and each shaft hole is sleeved on the supporting shaft on the corresponding side and is rotationally connected with the supporting shaft; after this structure is adopted, the middle part of the button can be reliably rotationally connected with the shell. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a schematic view of the three-dimensional structure of the present application;

[0012] Figure 2 is a schematic view of the partial sectional structure of the present application;

[0013] Figure 3 is Figure 2 is a schematic view of the structure after magnification at position A in the middle;

[0014] Figure 4 is Figure 2 is a schematic view of the structure after magnification at position B in the middle;

[0015] Figure 5 is Figure 2 is a schematic view of the structure after magnification at position C in the middle. DETAILED DESCRIPTION

[0016] First, those skilled in the art should understand that the embodiments are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can adjust them as needed in order to adapt to specific application occasions.

[0017] In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0018] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0019] The present application will be further described in detail below in conjunction with the drawings and specific embodiments.

[0020] Reference Figures 1-5As shown, the embodiment of the present application discloses a high branch machine with safety protection function, which comprises a shell 1, a rotating sleeve 2, a connecting sleeve 3, a transmission rod 4, a saw blade assembly 5, a driving assembly 6, a trigger switch 7 and a button 8; the rotating sleeve 2 is inserted into the front end of the shell 1 and can rotate relative to the shell 1, one end of the connecting sleeve 3 is inserted into the rotating sleeve 2 and fixed with the rotating sleeve 2, the other end of the connecting sleeve 3 is fixed with the saw blade assembly 5, the driving assembly 6 is fixed inside the shell 1, the transmission rod 4 is arranged inside the connecting sleeve 3, one end of the transmission rod 4 is in transmission connection with the driving end of the driving assembly 6, the other end of the transmission rod 4 is in transmission connection with the saw blade in the saw blade assembly 5; the trigger switch 7 is fixed inside the shell 1, the driving assembly 6 is in electrical connection with the power line 71 after being connected with the trigger switch 7 in series, the button 8 is rotatably connected with the shell 1, the first spring 9 is arranged between the rear end of the button 8 and the shell 1; when the rear end of the button 8 is pressed to make the button 8 rotate relative to the shell 1, the front end of the button 8 is used to push the trigger end of the trigger switch 7 to make the trigger switch 7 conductive; the limiting structure is arranged between the rotating sleeve 2 and the shell 1; when the rotating sleeve 2 drives the saw blade assembly 5 to rotate through the connecting sleeve 3 to make the saw blade assembly 5 adjust the direction, the limiting structure is used to lock the rotating sleeve 2 and the shell 1 to limit the free rotation of the rotating sleeve 2 relative to the shell 1; when the rotating sleeve 2 and the shell 1 are not locked by the limiting structure, the limiting structure is used to limit the rotation of the button 8 to avoid the trigger end of the trigger switch 7 being triggered by mistake; in the above structure, when the button is released, the first spring can drive the button to rotate and reset.

[0021] The limiting structure comprises the knob 10 and the push knob 20; the knob 10 is slidably connected to the side wall of the front end of the rotating sleeve 2, the rear end of the knob 10 is provided with the first inserting rod 101, the front end of the shell 1 is provided with a plurality of first inserting slots 11 which are distributed in the circumferential direction, the second spring 30 is arranged between the knob 10 and the rotating sleeve 2, the second spring 30 is used for applying the elastic force to the knob 10 to drive the knob 10 to slide backward, so that the first inserting rod 101 is matched and inserted with one of the first inserting slots 11 to lock the rotating sleeve 2 and the shell 1; the push knob 20 is slidably connected to the top of the shell 1, the front end of the push knob 20 is provided with the second inserting rod 201, the rear end of the rotating sleeve 2 is provided with a plurality of second inserting slots 21 which are distributed in the circumferential direction; when the first inserting rod 101 is matched and inserted with one of the first inserting slots 11 to lock the rotating sleeve 2 and the shell 1, one of the second inserting slots 21 is horizontally aligned with the second inserting rod 201 and is used for horizontally inserting the second inserting rod 201; the third spring 40 is arranged between the push knob 20 and the shell 1, the third spring 40 is used for applying the elastic force to the push knob 20 to drive the push knob 20 to slide backward, so that the second inserting rod 201 is separated from the second inserting slot 21; the bottom of the rear end of the push knob 20 is provided with the abutting part 202; when the push knob 20 slides backward, the abutting part 202 is used for abutting with the top of the rear end of the button 8 and limiting the rotation of the button 8 to avoid the false triggering of the triggering end of the trigger switch 7; by adopting the above-mentioned limiting structure, when it is needed to adjust the direction of the saw blade assembly, the knob is pushed to separate the first inserting rod from the first inserting slot, at this time, the rotating sleeve can rotate relative to the shell, since one end of the connecting sleeve is inserted into the rotating sleeve and is fixed with the rotating sleeve, the other end of the connecting sleeve is fixed with the saw blade assembly, so that when the rotating sleeve rotates, the saw blade assembly can be driven to rotate through the connecting sleeve, that is, the adjustment of the direction of the saw blade assembly is realized; after the saw blade assembly is adjusted in the direction through the rotating sleeve driving the saw blade assembly to rotate through the connecting sleeve, the knob is released, at this time, the knob can slide backward relative to the rotating sleeve under the elastic force of the second spring, and then the first inserting rod can be matched and inserted with one of the first inserting slots in the corresponding position to lock the rotating sleeve and the shell; after the first inserting rod is matched and inserted with one of the first inserting slots in the corresponding position to lock the rotating sleeve and the shell, one of the second inserting slots can be horizontally aligned with the second inserting rod, at this time, the user can push the push knob to make the push knob slide forward relative to the shell (the second inserting rod on the push knob can be inserted into the second inserting slot in the corresponding position), after the push knob is pushed forward, the abutting part on the push knob can be separated from the abutting state with the top of the rear end of the button, so that the rotation limiting state of the button can be released, at this time, the user can press the rear end of the button to make the button rotate, after the button rotates, the front end of the button can push the triggering end of the trigger switch to make the trigger switch conductive, so that the driving assembly can drive the saw blade in the saw blade assembly to rotate through the transmission rod.In the above process, when the rotating sleeve is rotated and the saw blade assembly is rotated by the rotating sleeve through the connecting sleeve, if the rotating sleeve is not rotated to the set direction, i.e., the saw blade assembly is not rotated to the set direction, after the knob is released, the first inserting rod cannot be matched and inserted with any one first inserting slot to lock the rotating sleeve and the shell, at this time, the second inserting rod on the push-torque cannot be horizontally aligned with any one second inserting slot, i.e., the second inserting rod on the push-torque is in the state of abutting against the rear end of the rotating sleeve and cannot be pushed forward, at this time, the abutting part on the push-torque is in the state of abutting against the top of the rear end of the button, thereby the rotation of the button can be limited to avoid the button causing the trigger end of the trigger switch to be triggered by mistake, i.e., the accidental start of the pole pruner can be avoided, and the safety hazard is eliminated; after the above structure is adopted, it is also explained that when the rotating sleeve and the shell are not locked by the limiting structure (the direction of the saw blade assembly is not adjusted to the set direction), the limiting structure can limit the rotation of the button to avoid the button causing the trigger end of the trigger switch to be triggered by mistake, thereby the accidental start of the pole pruner can be avoided; in addition, it should be noted that after the first inserting rod is matched and inserted with one first inserting slot at the corresponding position to lock the rotating sleeve and the shell, and after the push-torque is pushed forward (one second inserting slot can be horizontally aligned with the second inserting rod at this time, at this time, the user can push the push-torque to make the push-torque slide forward relative to the shell, and make the second inserting rod on the push-torque inserted into the second inserting slot at the corresponding position), the abutting part on the push-torque can be released from the abutting state with the top of the rear end of the button, thereby the rotation limiting state of the button can be released, at this time, the user can press the rear end of the button and make the button rotate, after the button is rotated, the front end of the button can push the trigger end of the trigger switch to make the trigger switch conduct, i.e., the pole pruner can work under power; under the working state of the pole pruner under power, i.e., under the condition that the button is pressed, even if the push-torque is released, the abutting part on the push-torque can be in the abutting state with the inner wall of the rear end of the button, i.e., under the state that the button is pressed, the push-torque cannot slide back to reset under the action of the third spring, thereby the second inserting rod can be kept in the state of being inserted into the corresponding second inserting slot, at this time, the rotating sleeve is in the state of being rotated and locked by the push-torque, under this state, even if the knob is forwardly pushed to make the first inserting rod disengaged from the first inserting slot, the rotating sleeve cannot be rotated relative to the shell, thereby the direction of the saw blade assembly cannot be adjusted when the pole pruner works, the safety of the pole pruner in use is ensured; after the above structure is adopted, the button, the rotating sleeve, the push-torque and the button can achieve the interlocking purpose, i.e., when the direction of the saw blade assembly is not adjusted to the set direction, the pole pruner cannot work, when the pole pruner works, the direction of the saw blade assembly cannot be adjusted, thereby the safety of the pole pruner in use is ensured.

[0022] The rear end of the push-torque 20 is provided with a ring-shaped sleeve part 203, which is sleeved on the outside of the connecting sleeve 3 and can slide along the axial direction of the connecting sleeve 3, and the abutting part 202 is arranged at the bottom of the sleeve part 203; by arranging the ring-shaped sleeve part at the rear end of the push-torque, since the sleeve part is sleeved on the outside of the connecting sleeve and can slide along the axial direction of the connecting sleeve, when the push-torque is pushed by the finger, the sliding of the push-torque can be smoother, i.e. the pushing of the push-torque can be facilitated.

[0023] The outer end surface of the push button 10 is formed as an arc-shaped concave surface 102 which gradually inclines inward from front to back; by arranging the outer end surface of the push button as the arc-shaped concave surface which gradually inclines inward from front to back, when the push button is pushed by the finger, the finger can abut against the arc-shaped concave surface, so that the anti-disengagement effect between the finger and the push button can be improved, i.e. the finger can more reliably push the push button.

[0024] The top of the rear end of the push-torque 20 is provided with a step part 204, which is used to abut against the finger to facilitate the forward pushing of the push-torque 20 by the finger; by arranging the step part at the top of the rear end of the push-torque, when the push-torque needs to be pushed, the step part can abut against the finger, so that the anti-disengagement effect between the finger and the push-torque can be improved, i.e. the process of pushing the push-torque by the finger can be facilitated, and the reliability of pushing the push-torque by the finger can be improved.

[0025] The middle part of the push button 8 is provided with a pair of shaft holes 81, and a pair of supporting shafts 12 are arranged on the inner wall of the shell 1, each shaft hole 81 is sleeved on the corresponding side supporting shaft 12 and is in rotational connection with the supporting shaft 12; by adopting this structure, the middle part of the push button can be reliably connected in rotation with the shell.

[0026] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A high branch machine with safety protection function, comprising a shell, a rotating sleeve, a connecting sleeve, a transmission rod, a saw blade assembly, a driving assembly, a trigger switch and a button; the rotating sleeve is inserted into the front end of the shell and can rotate relative to the shell, one end of the connecting sleeve is inserted into the rotating sleeve and fixed with the rotating sleeve, the other end of the connecting sleeve is fixed with the saw blade assembly, the driving assembly is fixed inside the shell, the transmission rod is arranged inside the connecting sleeve, one end of the transmission rod is in transmission connection with the driving end of the driving assembly, the other end of the transmission rod is in transmission connection with the saw blade in the saw blade assembly; the trigger switch is fixed inside the shell, the driving assembly is in electrical connection with the power line after being connected in series with the trigger switch, the button is rotatably connected to the shell, a first spring is arranged between the rear end of the button and the shell; when the rear end of the button is pressed to make the button rotate relative to the shell, the front end of the button is used to push the trigger end of the trigger switch to make the trigger switch conductive; characterized in that: The rotation sleeve and the shell are provided with a limiting structure; when the rotation sleeve drives the saw blade assembly to rotate to adjust the direction of the saw blade assembly, the limiting structure is used to lock the rotation sleeve and the shell to limit the free rotation of the rotation sleeve relative to the shell; when the rotation sleeve and the shell are not locked by the limiting structure, the limiting structure is used to limit the rotation of the button to avoid the button causing the trigger end of the trigger switch to be triggered by mistake; the limiting structure comprises a knob and a push knob; the knob is slidably connected to the side wall of the front end of the rotation sleeve, the rear end of the knob is provided with a first insertion rod, the front end of the shell is provided with a plurality of first insertion slots which are distributed in a circumferential direction, a second spring is arranged between the knob and the rotation sleeve, the second spring is used to apply a spring force to the knob to drive the knob to slide backward, so that the first insertion rod is matched and inserted with one of the first insertion slots to lock the rotation sleeve and the shell; the push knob is slidably connected to the top of the shell, the front end of the push knob is provided with a second insertion rod, the rear end of the rotation sleeve is provided with a plurality of second insertion slots which are distributed in a circumferential direction; when the first insertion rod is matched and inserted with one of the first insertion slots to lock the rotation sleeve and the shell, one of the second insertion slots is horizontally aligned with the second insertion rod and is used for horizontally inserting the second insertion rod; a third spring is arranged between the push knob and the shell, the third spring is used to apply a spring force to the push knob to drive the push knob to slide backward, so that the second insertion rod is separated from the second insertion slot; the bottom of the rear end of the push knob is provided with an abutting portion; when the push knob slides backward, the abutting portion is used to abut against the top of the rear end of the button to limit the rotation of the button to avoid the button causing the trigger end of the trigger switch to be triggered by mistake.

2. The high-lift machine with safety protection function according to claim 1, characterized in that: The rear end of the push knob is provided with an annular sleeve portion which is sleeved on the outside of the connecting sleeve and can slide in the axial direction of the connecting sleeve, and the abutting portion is arranged on the bottom of the sleeve portion.

3. The high-lift branch machine with safety protection function according to claim 1, characterized in that: The outer end surface of the knob forms an arc-shaped concave surface which gradually inclines inward from front to back.

4. The high-lift machine with safety function according to claim 1, characterized in that: The top of the rear end of the push knob is provided with a step portion which is used to abut against the fingers to facilitate the fingers to push the push knob forward.

5. The high-lift machine with safety function according to claim 1, characterized in that: The middle portion of the button is provided with a pair of shaft holes, and the inner wall of the shell is provided with a pair of supporting shafts, each shaft hole is sleeved on the corresponding supporting shaft and is rotationally connected with the supporting shaft.

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