CN114750114A - Hand-held percussion tool - Google Patents

Abstract

The present invention provides a hand-held impact tool, comprising: the motor comprises a motor body, a shell and a handle, wherein the shell is used for supporting the motor and comprises a holding part for holding; an output part arranged at the front end of the shell; the hand-held impact tool further includes: a control unit controlling operation of the motor; the first key is arranged at the front end of the holding part; the second key is arranged on the shell; the switching key is arranged on the shell; the switching key is used for switching the handheld impact tool to a first state or a second state; when the handheld impact tool is in a first state, the first key can control the motor; when the switching device is in the second state, the second key can control the motor. The handheld impact tool provided by the invention is convenient for a user to operate, and the comfort level of holding the handheld electric tool is improved.

Description

Hand-held percussion tool

Technical Field

The invention relates to an electric tool, in particular to a handheld impact tool.

Background

Handheld impact tools have many application scenarios as a common tool to assist a user in working. In some special situations, a user needs to hold the handheld impact tool in a reverse direction for operation, and a trigger of the handheld impact tool is usually arranged in front of the holding portion, so that the user cannot conveniently and accurately control the operation of the motor, and the fatigue of the user in operating the handheld impact tool is increased.

Disclosure of Invention

In order to overcome the defects of the prior art, the present invention provides a handheld impact tool, which is convenient for a user to operate and improves the comfort level of holding the handheld electric tool.

In order to achieve the above main object, the present invention provides a hand-held impact tool including: the motor comprises a motor body, a shell and a handle, wherein the shell is used for supporting the motor body and comprises a holding part for holding; an output part arranged at the front end of the shell; a hand-held impact tool, further comprising: a control unit controlling operation of the motor; the first key is arranged at the front end of the holding part; the second key is arranged on the shell; the switching key is arranged on the shell; the switching key is used for switching the handheld impact tool to a first state or a second state; when the handheld impact tool is in a first state, the first key controls the operation of the motor; when the switching device switches the handheld impact tool to be in the second state, the second key controls the starting and stopping of the motor.

Optionally, the second button is disposed at a rear end of the grip portion.

Optionally, the housing includes a head shell and a power connection portion, the head shell is disposed above the holding portion, the power connection portion is disposed below the holding portion, the holding portion includes a first section connected to the head shell and a second section connected to the power connection portion, and the second key is disposed at the first section and located at the rear end of the holding portion.

Optionally, the second button is disposed at a rear end of the holding portion at a position opposite to the first button.

Optionally, the housing includes a head shell and a power connection portion, the head shell is disposed above the holding portion, the power connection portion is disposed below the holding portion, the holding portion includes a first section connected to the head shell and a second section connected to the power connection portion, and the second key is disposed at the second section and located at the rear end of the holding portion.

Optionally, the housing includes a head shell and a power connection portion, the head shell is disposed above the holding portion, the power connection portion is disposed below the holding portion, the holding portion includes a first section connected to the head shell and a second section connected to the power connection portion, and the second key is disposed at the first section and located at a side end of the holding portion.

Optionally, the housing includes a head shell and a power supply connection portion, the head shell is disposed above the holding portion, and the second button is disposed above the head shell.

Optionally, the switching key is disposed in front of the holding portion and below the first key.

Optionally, the switching key is disposed on one side of the second key, and a distance between the switching key and the second key is set to be less than or equal to 30 mm.

Optionally, the hand-held impact tool further comprises: the first switch can be triggered by the first key, the second switch can be triggered by the second key, and the change-over switch can be triggered by the change-over key.

Drawings

FIG. 1 is a perspective view of a hand-held impact tool in accordance with a first embodiment of the present invention;

FIG. 2 is a perspective view of another angle of the hand held impact tool of FIG. 1;

FIG. 3 is a perspective view of another angle of the hand held impact tool of FIG. 1;

FIG. 4 is a schematic view of the internal structure of the hand held impact tool of FIG. 1;

FIG. 5 is a schematic diagram of circuit components of the hand-held impact tool of FIG. 1;

FIG. 6 is a key control logic diagram of the hand-held impact tool of FIG. 1;

FIG. 7 is a perspective view of a hand held impact tool in accordance with a second embodiment of the present invention;

FIG. 8 is a perspective view of another construction of the hand-held impact tool of FIG. 7;

FIG. 9 is a perspective view of a hand-held impact tool of a third embodiment of the present invention;

FIG. 10 is a perspective view of another construction of the hand-held impact tool of FIG. 9;

fig. 11 is a perspective view schematically showing a hand-held impact tool according to a fourth embodiment of the present invention.

Detailed Description

The invention is described in detail below with reference to the figures and the embodiments.

Fig. 1 is a schematic view of a hand-held power tool 100 of the present invention, which is a rotary impact type tool, such as an impact screwdriver or impact wrench.

Referring to fig. 1 to 4, a hand-held impact tool 100 includes: the housing 110, the motor 130, the output part 170, and the transmission assembly 120; wherein, the output part 170 is used for torque output; the motor 130 is located inside the housing 110, and the output unit 170 is disposed at the front end of the housing 110. The motor 130 includes an output shaft rotating around the first axis 101, the transmission assembly 120 connects the motor 130 and the output part 170, the transmission assembly 120 is used for transmitting the output driving force of the motor 130 to the output part 170, specifically, the transmission assembly 120 outputs the rotation output of the motor shaft to the output part 170 after reducing the speed, in this embodiment, the transmission assembly may be a speed reducing device of a planetary gear mechanism, and the rotation of the motor 130 is reduced by the planetary gear mechanism. The output portion 170 includes an impact force generating mechanism for generating an impact force.

The hand-held impact tool 100 further includes a circuit board (not shown) electrically connected to the motor 130 for controlling the output of the driving force from the motor 130, and the circuit board is accommodated in the housing 110.

The housing 110 is formed with a receiving cavity, at least a part of the motor 130 and a part of the transmission assembly 120 are received in the receiving cavity, in this embodiment, the motor 130 and the transmission assembly 120 are both received in the receiving cavity formed in the housing 110 and are arranged along the first axis 101 of the motor shaft of the motor 130, the transmission assembly 120 is connected to the motor 130 and is located in front of the housing 110 relative to the motor 130, and the motor 130 and the transmission assembly 120 are configured to rotate coaxially, but may also be configured to rotate non-coaxially in other embodiments.

The hand-held impact tool 100 further includes a grip portion 111 and a power supply connection portion 113, the grip portion 111 being formed by the housing 110 for gripping by a user; the power supply connection part 113 is used for connecting a power supply; the power supply is used to provide power to the hand-held impact tool 100. Alternatively, the hand held impact tool 100 is powered using a DC power source, and more specifically, the hand held impact tool 100 is powered using a battery pack that cooperates with a corresponding power circuit to power the motor 130 and circuit components on the circuit board. It should be understood by those skilled in the art that the power supply is not limited to the battery pack, and the power supply may be implemented by the commercial power and the ac power supply in cooperation with corresponding rectifying, filtering and voltage regulating circuits.

Referring to fig. 5, the circuit board, which is a circuit element, includes a control unit 180 for controlling the operation of the motor 130. The housing 110 is provided with a first key 210 and a second key 220, the circuit board further comprises a first switch 140 and a second switch 150, the first switch 140 can be triggered by the first key 210, the second switch 150 can be triggered by the second key 220, and the first switch 140 or the second switch 150 is triggered by pressing the first key 210 or the second key 220 respectively, so that the motor 130 is controlled.

The first button 210 is disposed at the front end of the grip portion 111, the first button 210 is a main trigger for controlling the hand-held impact tool 100, and the first switch 140 is a main switch for controlling the hand-held impact tool 100, and in most cases where the hand-held impact tool 100 is used, the user usually faces the output portion forward, i.e., away from the user, and presses the first button 210 to control the operation of the hand-held impact tool 100. The second button 220 is disposed on the housing 110 for controlling the start and stop of the motor 130.

The hand-held impact tool 100 further comprises a switch button 230, which is arranged on the housing and can switch the hand-held impact tool 100 to a first state or a second state, and when the switch device switches the hand-held impact tool 100 to the first state, the first button 210 controls the operation of the motor 130; the second button 220 can control the start and stop of the motor 130 when the switching device switches the hand-held impact tool 100 to the second state. Such that the second button 220 is not capable of controlling the operation of the motor 130 when the hand held impact tool 100 is in the first state; when the hand-held impact tool 100 is in the second state, the first button 210 cannot control the start and stop of the motor 130; when the user presses the first button 210 and the second button 220 simultaneously, the two buttons are prevented from interfering with each other, and the control of the motor 130 is prevented from being disturbed. The circuit board further comprises a switch 160, the switch 160 can be triggered by the switch key 230, and the switch 160 can send a signal for switching the circuit board to the first state or the second state.

Optionally, the first switch 140, the second switch 150, and the switch 160 are signal switches, and when the first key 210, the second key 220, or the switch key 230 is operated, the first switch 140, the second switch 150, and the switch 160 are correspondingly triggered; the first switch 140, the second switch 150 and the changeover switch 160 send corresponding signals to the control unit 180 to control the operation of the motor 130 and the state of the hand-held impact tool 100. Optionally, the first switch 140, the second switch 150 and the switch 160 are mechanical switches, and the first state or the second state of the hand-held impact tool 100 is switched by changing the communication connection between the first switch 140 or the second switch 150 and the motor 130 by pressing the switch key 230.

Referring to fig. 6, first, a switch that can start the motor is defined as an active switch, and a switch that cannot start the motor is defined as an inactive switch; after the circuit board is electrified, reading an effective switch used in the previous round as an effective switch of the current round which can start the motor; judging whether the effective switch is pressed down or not according to the state of the trigger switch of the user, and starting the motor if the effective switch is pressed down; if the invalid switch is pressed, the motor is not started; if the valid switch and the invalid switch are not pressed down and the change-over switch is pressed down, the valid switch and the invalid switch are switched and stored, whether the valid switch is pressed down or not is judged again according to the state of the switch pressed down by a user, and the motor is correspondingly started or not according to the state of the switch.

In the present embodiment, referring to FIG. 2, the hand-held impact tool 100 is powered using a battery pack that is removably mounted to the hand-held impact tool 100. The battery pack is detachably connected with the power supply connecting part 113 in a matching manner.

The head housing 112 is disposed above the grip portion 111, the power supply connection portion 113 is disposed below the grip portion 111, and the grip portion 111 includes a first section 114 connected to the head housing 112 and a second section 115 connected to the power supply connection portion 113, such that the first section 114 is disposed above the second section 115.

In the present embodiment, referring to fig. 4, the output section 170 includes an impact force generation mechanism for generating an impact force. In some embodiments, the output 170 includes a spindle 173 connected to the transmission assembly 120, a hammer 171 mounted on the spindle 173, an anvil 172 engaged with and struck by the hammer 171, and a tool attachment 174 impacted by the anvil 172, wherein the tool attachment 174 includes an end member (not shown), which may be a socket head or the like, for receiving a screw.

The rotational force of the motor 130 is converted to a rotational impact force through the transmission assembly 120 and the output 170 and transmitted to the tool attachment 174, whereby an end member (not shown) is rotationally impacted to tighten the screw into the workpiece. Specifically, the spindle 173 is rotated by the rotational force of the motor 130 via the transmission assembly 120, the hammer 171 rotates together with the spindle 173, the rotational force of the hammer 171 is converted into a rotational impact force via the hammer 171 and the anvil 172 to be transmitted to the anvil 172, and the anvil 172 drives the tool attachment 174 to perform an impact motion, thereby driving the end member to rotationally impact and fastening the screw into the workpiece.

When the hand-held impact tool 100 is used, the output part 170 is usually facing forward, i.e. away from the user, and the user holds the hand-held impact tool 100 from the back of the holding part 111, at this time, the hand-held impact tool 100 is in the first state, and the fingers hook the first button 210, so as to control the motor 130 to operate to perform the torque output operation. However, in some application scenarios, the output portion 170 needs to face backward, i.e. toward the user, and the user needs to hold the holding portion 111 backward at this time, so that when the user stretches his hand to press the first key 210 located in front of the holding portion 111, the user does not conform to human mechanics, the holding fatigue of the user is increased, and the user is not favorable for long-lasting operation. In order to solve the above problem, the second key 220 is disposed at the rear end of the holding portion 111, so that in this application scenario, when the output portion 170 faces the user, the second key 220 is relatively located in front of the user, the user holds the handheld impact tool 100 directly from the front of the holding portion 111, i.e., with the palm facing the first key 210, and the fingers contact the second key 220. At this time, the switching button 230 is adjusted to switch the handheld impact tool 100 to the second state, and the motor 130 can be controlled to be started by directly pressing the second button 220, so that the handheld impact tool 100 operates, thereby improving the use comfort of the user in the application scenario.

Alternatively, referring to fig. 1 to 3, the second button 220 is relatively located on the first segment 114 of the holding portion 111. The heights of the first key 210 and the second key 220 in the up-down direction of the grip portion 111 are substantially the same, and the positions of the keys correspond to the operation habits of the user regardless of whether the hand-held impact tool 100 is used in the forward direction or in the reverse direction.

In the present embodiment, referring to fig. 1 and 2, the switch key 230 is disposed at the second section 115 of the grip portion 111 and in front of the grip portion 111, and the switch key 230 is disposed above the power connection portion 113 and below the first key 210.

As an alternative embodiment, referring to fig. 3, the switch key 230 is arranged at the first section 114 of the grip portion 111 and at the rear of the grip portion 111, the switch key 230 is arranged adjacent to the second key 220; the distance between the switching key 230 and the second key 220 is set to be less than or equal to 30mm, so that the operation is simple and convenient for a user to operate.

In the second example of the present invention, referring to fig. 7 and 8, the second button 220a is disposed at the second segment 115 and at the rear end of the grip 111.

Referring to fig. 7, the switching key 230a is provided in front of the second stage 115 of the grip 111.

As an alternative embodiment, referring to fig. 8, the switching key 230a is disposed at the rear end of the second section 115 of the grip 111 and disposed adjacent to the second key 220a, and the interval between the switching key 230a and the second key 220a is set to be 30mm or less.

In a third example of the present invention, referring to fig. 9 and 10, the second button 220b is disposed above or at a side of the head housing 112.

Referring to fig. 9, the switch key 230b is disposed at the second stage 115 of the grip portion 111 and in front of the grip portion 111, and the switch key 230b is disposed above the power supply connection portion 113 and below the first key 210 b.

As an alternative embodiment, referring to fig. 10, the second key 220b is disposed above or to the side of the head housing 112. The switching key 230b is disposed adjacent to the second key 220b, and a distance between the switching key 230b and the second key 220b is set to be 30mm or less.

In a fourth example of the present invention, referring to fig. 11, the second button 220c is disposed on the first segment 114 of the holding portion 111 and is located at a side end of the holding portion 111.

In the fifth embodiment of the present invention, the hand-held impact tool 100 further comprises a third button, the switch 160 can switch the hand-held impact tool 100 to the first state, the second state and the third state, when the switching device is in the first state, only the first button can control the motor 130, when the switching device is in the second state, only the second button 220 can control the motor 130; when the switching device is in the third state, only the third button can control the operation of the motor 130. So that the second button 220 and the third button cannot control the operation of the motor 130 in the first state and the first button 210 and the third button cannot control the operation of the motor 130 in the second state. The second button 220 is disposed behind the grip portion 111, and the third button is disposed above the head case 112.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalents or equivalent changes fall within the protection scope of the present invention.

Claims (10)

1. A hand-held impact tool comprising:

a motor is arranged on the base plate, and the motor,

a housing for supporting the motor, the housing including a grip portion for gripping;

an output part arranged at the front end of the shell;

the method is characterized in that:

the hand-held impact tool further includes:

a control unit controlling operation of the motor;

the first key is arranged at the front end of the holding part;

the second key is arranged on the shell;

the switching key is arranged on the shell; the switching key is used for switching the handheld impact tool to a first state or a second state;

when the handheld impact tool is in a first state, the first key controls the operation of the motor;

and when the switching device switches the handheld impact tool to be in a second state, the second key controls the starting and stopping of the motor.

2. The hand-held impact tool of claim 1, wherein: the second key is arranged at the rear end of the holding part.

3. The hand-held impact tool of claim 1, wherein: the housing includes: a head case and a power supply connection part; the head shell is arranged above the holding part; the power supply connecting part is arranged below the holding part; the holding part comprises a first section connected with the head shell and a second section connected with the power supply connecting part, and the second key is arranged at the first section and is positioned at the rear end of the holding part.

4. The hand-held impact tool of claim 3, characterized in that: the second key is arranged at the rear end of the holding part at the position opposite to the first key.

5. The hand-held impact tool of claim 1, wherein: the housing includes: a head case and a power supply connection part; the head shell is arranged above the holding part, the power supply connecting part is arranged below the holding part, the holding part comprises a first section connected with the head shell and a second section connected with the power supply connecting part, and the second key is arranged at the second section and is positioned at the rear end of the holding part.

6. The hand-held impact tool of claim 1, wherein: the housing includes: a head case and a power supply connection part; the head shell is arranged above the holding part, the power supply connecting part is arranged below the holding part, the holding part comprises a first section connected with the head shell and a second section connected with the power supply connecting part, and the second key is arranged at the first section and is positioned at the side end of the holding part.

7. The hand-held impact tool of claim 1, wherein: the housing includes: a head case and a power supply connection part; the head shell is arranged above the holding part, and the second key is arranged above the head shell.

8. The hand-held impact tool according to any one of claims 1 to 7, characterized in that: the switching key is arranged in front of the holding part and is positioned below the first key.

9. The hand-held impact tool according to any one of claims 1 to 7, characterized in that: the switching key is arranged on one side of the second key, and the distance between the switching key and the second key is set to be less than or equal to 30 mm.

10. The hand-held impact tool of claim 1, wherein: the hand-held impact tool further includes: a first switch, a second switch and a change-over switch; the first switch can be triggered by the first key, the second switch can be triggered by the second key, and the change-over switch can be triggered by the change-over key.

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