Hand-held impact tool

Abstract

The present invention provides a handheld impact tool, comprising: a motor, a housing for supporting the motor, the housing including a grip portion for holding; an output portion provided at the front end of the housing; the handheld impact tool further comprising: a control unit for controlling the operation of the motor; a first button provided at the front end of the grip portion; a second button provided on the housing; a switching button provided on the housing; the switching button is used to switch the handheld impact tool to a first state or a second state; when the handheld impact tool is in the first state, the first button can control the motor; when the switching device is in the second state, the second button can control the motor. The handheld impact tool provided by the present invention is convenient for users to operate and improves the comfort of holding the handheld power tool.

Description

Technical Field

[0001] The present invention relates to a power tool, and more particularly to a handheld impact tool. Background Art

[0002] As a commonly used tool to assist users in their work, handheld impact tools have many application scenarios. In some special scenarios, users need to hold the handheld impact tool in a reverse grip for operation. Usually, the trigger of the handheld impact tool is set in front of the grip portion, which is not convenient for users to precisely control the operation of the motor and increases the fatigue of users when operating the handheld impact tool. Summary of the Invention

[0003] To solve the deficiencies of the prior art, the purpose of the present invention is to provide a handheld impact tool that is convenient for users to operate and improves the comfort of holding the handheld power tool.

[0004] To achieve the above main purpose, the present invention provides a handheld impact tool, including: a motor, a housing for supporting the motor, the housing including a grip portion for holding; an output portion provided at the front end of the housing; the handheld impact tool further includes: a control unit for controlling the operation of the motor; a first button provided at the front end of the grip portion; a second button provided on the housing; a switching button provided on the housing; the switching button is used to switch the handheld impact tool to a first state or a second state; wherein, when the handheld impact tool is in the first state, the first button controls the operation of the motor; when the switching device switches the handheld impact tool to the second state, the second button controls the start and stop of the motor.

[0005] Optionally, the second button is provided at the rear end of the grip portion.

[0006] Optionally, the housing includes a head shell and a power connection portion, the head shell is provided above the grip portion, the power connection portion is provided below the grip portion, the grip portion includes a first section connecting the head shell and a second section connecting the power connection portion, the second button is provided on the first section and at the rear end of the grip portion.

[0007] Optionally, the second button is provided at the rear end of the grip portion at a position opposite to the first button.

[0008] Optionally, the housing includes a head shell and a power connection portion, the head shell is provided above the grip portion, the power connection portion is provided below the grip portion, the grip portion includes a first section connecting the head shell and a second section connecting the power connection portion, the second button is provided on the second section and at the rear end of the grip portion.

[0009] Optionally, the housing includes a head housing and a power connection part. The head housing is disposed above the holding part, and the power connection part is disposed below the holding part. The holding part includes a first section connecting the head housing and a second section connecting the power connection part. The second button is disposed on the first section and at the side end of the holding part.

[0010] Optionally, the housing includes a head housing and a power connection part. The head housing is disposed above the holding part, and the second button is disposed above the head housing.

[0011] Optionally, the switching button is disposed in front of the holding part and below the first button.

[0012] Optionally, the switching button is disposed on one side of the second button, and the distance between the switching button and the second button is set to be less than or equal to 30 mm.

[0013] Optionally, the hand-held impact tool further includes: a first switch, a second switch, and a switching switch. The first switch can be triggered by the first button, the second switch can be triggered by the second button, and the switching switch can be triggered by the switching button. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a perspective schematic view of the hand-held impact tool according to the first embodiment of the present invention;

[0015] Figure 2 is Figure 1 a perspective schematic view of the hand-held impact tool in

[0016] Figure 3 is Figure 1 a perspective schematic view of the hand-held impact tool in

[0017] Figure 4 is Figure 1 an internal structure schematic view of the hand-held impact tool in

[0018] Figure 5 is Figure 1 a schematic view of the circuit components of the hand-held impact tool in

[0019] Figure 6 is Figure 1 a key control logic diagram of the hand-held impact tool in

[0020] Figure 7 is a perspective schematic view of the hand-held impact tool according to the second embodiment of the present invention;

[0021] Figure 8 is Figure 7 a perspective schematic view of another structure of the hand-held impact tool in

[0022] Figure 9 is a three-dimensional schematic view of a hand-held impact tool according to the third embodiment of the present invention;

[0023] Figure 10 is Figure 9 a three-dimensional schematic view of another structure of the hand-held impact tool;

[0024] Figure 11 is a three-dimensional schematic view of a hand-held impact tool according to the fourth embodiment of the present invention. Specific Embodiments

[0025] The present invention will be specifically introduced below with reference to the accompanying drawings and specific embodiments.

[0026] Figure 1 A schematic view of a hand-held impact tool 100 of the present invention. The hand-held power tool is a rotary impact tool, such as an impact screwdriver or an impact wrench.

[0027] Referring to Figures 1 to 4 , the hand-held impact tool 100 includes: a housing 110, a motor 130, an output portion 170, and a transmission assembly 120; wherein, the output portion 170 is used for torque output; the motor 130 is located inside the housing 110, and the output portion 170 is provided at the front end of the housing 110. The motor 130 includes an output shaft that rotates about a first axis 101. The transmission assembly 120 connects the motor 130 and the output portion 170, and the transmission assembly 120 is used to transmit the output driving force of the motor 130 to the output portion 170. Specifically, the transmission assembly 120 reduces the rotational output of the motor shaft and then rotates and outputs it to the output portion 170. In this embodiment, the transmission assembly can be a reduction device of a planetary gear mechanism, and the rotation of the motor 130 is reduced in speed through the planetary gear mechanism. The output portion 170 includes an impact force generating mechanism for generating an impact force.

[0028] The hand-held impact tool 100 further includes a circuit board (not shown in the figure), and the circuit board is electrically connected to the motor 130 for controlling the output driving force of the motor 130. The circuit board is accommodated in the housing 110.

[0029] The housing 110 is formed with a receiving cavity around it, and at least part of the motor 130 and part of the transmission assembly 120 are accommodated in the receiving cavity. In this embodiment, both the motor 130 and the transmission assembly 120 are accommodated in the receiving cavity formed by 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. The motor 130 and the transmission assembly 120 form a coaxial rotation. Of course, in other embodiments, they can also form a non-coaxial rotation.

[0030] The hand-held impact tool 100 further includes a grip portion 111 and a power connection portion 113. The grip portion 111 is formed by a housing 110 for a user to hold. The power connection portion 113 is used to connect to a power source, and the power source is used to supply electrical energy to the hand-held impact tool 100. Optionally, the hand-held impact tool 100 is powered by a DC power source. More specifically, the hand-held impact tool 100 is powered by a battery pack, and the battery pack cooperates with a corresponding power circuit to supply power to the motor 130 and the circuit components on the circuit board. Those skilled in the art should understand that the power source is not limited to the scenario of using a battery pack, and can also supply power to each circuit element through mains electricity, an AC power source, and cooperate with corresponding rectification, filtering, and voltage regulation circuits.

[0031] Referring to Figure 5 , the circuit board includes a control unit 180 for controlling the operation of the motor 130, and the circuit board is a circuit component. A first button 210 and a second button 220 are provided on the housing 110. The circuit board further includes a first switch 140 and a second switch 150. The first switch 140 can be triggered by the first button 210, and the second switch 150 can be triggered by the second button 220. By pressing the first button 210 or the second button 220 to trigger the first switch 140 or the second switch 150 respectively, the control of the motor 130 is realized.

[0032] The first button 210 is provided at the front end of the grip portion 111. The first button 210 is the main trigger for controlling the hand-held impact tool 100, and the first switch 140 is the main switch for controlling the hand-held impact tool 100. In most cases where the hand-held impact tool 100 is used, usually the output portion faces forward, that is, away from the user. The user controls the operation of the hand-held impact tool 100 by pressing the first button 210. The second button 220 is provided on the housing 110 and is used to control the start and stop of the motor 130.

[0033] The handheld impact tool 100 further includes a switching button 230, which is arranged on the housing and can switch the handheld impact tool 100 to the first state or the second state. When the switching device switches the handheld impact tool 100 to the first state, the first button 210 controls the operation of the motor 130; when the switching device switches the handheld impact tool 100 to the second state, the second button 220 can control the start and stop of the motor 130. Thus, when the handheld impact tool 100 is in the first state, the second button 220 cannot control the operation of the motor 130; when the handheld impact tool 100 is in the second state, the first button 210 cannot control the start and stop of the motor 130; preventing interference between the two buttons when the user presses the first button 210 and the second button 220 simultaneously, and disturbing the control of the motor 130. The circuit board further includes a changeover switch 160, which can be triggered by the switching button 230, and the changeover switch 160 can send a signal for switching the circuit board to the first state or the second state.

[0034] Optionally, the first switch 140, the second switch 150, and the changeover switch 160 are signal switches. When the first button 210, the second button 220, or the switching button 230 is operated, the first switch 140, the second switch 150, and the changeover 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 handheld impact tool 100. Optionally, the first switch 140, the second switch 150, and the changeover switch 160 are mechanical switches. By pressing the switching button 230, the communication connection between the first switch 140 or the second switch 150 and the motor 130 is changed, thereby switching the handheld impact tool 100 between the first state and the second state.

[0035] Refer to Figure 6 , first, define the switch that can start the motor as the valid switch, and the switch that cannot start the motor as the invalid switch; after the circuit board is powered on, read the valid switch used in the previous round as the valid switch that can start the motor in this round; determine whether the valid switch is pressed according to the state of the switch triggered by the user. If the valid switch is pressed, start the motor; if the invalid switch is pressed, do not start the motor; if neither the valid switch nor the invalid switch is pressed and the changeover switch is pressed, the valid switch and the invalid switch are switched and stored, and then determine whether the valid switch is pressed again according to the state of the switch pressed by the user, and the motor starts or does not start according to the switch state.

[0036] In this embodiment, refer to Figure 2 , the handheld impact tool 100 is powered by a battery pack, and the battery pack is detachably installed on the handheld impact tool 100. The battery pack and the power connection part 113 form a detachable mating connection.

[0037] The housing 112 is disposed above the grip portion 111, and the power connection portion 113 is disposed below the grip portion 111. The grip portion 111 includes a first section 114 connecting to the housing 112 and a second section 115 connecting to the power connection portion 113, so that the first section 114 is disposed above the second section 115.

[0038] In this embodiment, referring to Figure 4 , the output unit 170 includes an impact force generating mechanism for generating an impact force. In some specific embodiments, the output unit 170 includes a main shaft 173 connected to the transmission assembly 120, a hammer portion 171 mounted on the main shaft 173, an anvil portion 172 that cooperates with the hammer portion 171 and is struck by it, and a tool accessory 174 driven by the anvil portion 172 to impact. The tool accessory 174 includes an end member (not shown in the figure), and the end member (not shown in the figure) can be a socket head or a similar component, which is a component for installing screws.

[0039] The rotational force of the motor 130 is converted into a rotational impact force after passing through the transmission assembly 120 and the output unit 170 and is transmitted to the tool accessory 174, so that the end member (not shown in the figure) rotates and impacts to fasten the screw into the workpiece. Specifically, the rotational force of the motor 130 causes the main shaft 173 to rotate via the transmission assembly 120, the hammer portion 171 rotates together with the main shaft 173, and the rotational force of the hammer portion 171 is converted into a rotational impact force and transmitted to the anvil portion 172 via the hammer portion 171 and the anvil portion 172. The anvil portion 172 drives the tool accessory 174 to perform an impact motion, thereby driving the end member to rotate and impact to fasten the screw into the workpiece.

[0040] When using the handheld impact tool 100, usually the output part 170 faces forward, that is, away from the user. The user holds the handheld impact tool 100 from the rear of the holding part 111. At this time, the handheld impact tool 100 is in the first state. The user presses the first button 210 with a finger to control the operation of the motor 130 for torque output operation. However, in some application scenarios, it is necessary to face the output part 170 backward, that is, toward the user. At this time, the user needs to hold the holding part 111 in reverse. Thus, when reaching out to press the first button 210 located in front of the holding part 111, it does not conform to ergonomics, increases the user's holding fatigue, and is not conducive to long-term continuous operation. To solve the above problems, the second button 220 is set at the rear end of the holding part 111. Thus, in this application scenario, when the output part 170 faces the user, the second button 220 is relatively in front of the user. The user directly holds the handheld impact tool 100 from the front of the holding part 111, that is, the palm faces the first button 210, and the finger touches the second button 220. At this time, by adjusting the switching button 230, the handheld impact tool 100 is switched to the second state. Pressing the second button 220 directly can control the motor 130 to start and make the handheld impact tool 100 operate, thereby improving the user's comfort in this application scenario.

[0041] Optionally, referring to Figures 1 to 3 , the second button 220 is relatively located on the first section 114 of the holding part 111. The first button 210 and the second button 220 are basically the same in height in the up-down direction of the holding part 111. Whether the handheld impact tool 100 is used forward or backward, the positions of the buttons conform to the user's operation habits.

[0042] In this embodiment, referring to Figure 1 and Figure 2 the switching button 230 is set on the second section 115 of the holding part 111, and is set in front of the holding part 111. The switching button 230 is set above the power connection part 113 and is located below the first button 210.

[0043] As an alternative implementation, referring to Figure 3 , the switching button 230 is set on the first section 114 of the holding part 111, and is set at the rear of the holding part 111. The switching button 230 is adjacent to the second button 220; the distance between the switching button 230 and the second button 220 is set to be less than or equal to 30 mm, which is simple to operate and convenient for the user to operate.

[0044] In the second example of the present invention, referring to Figure 7 and Figure 8 , the second button 220a is set on the second section 115 and is located at the rear end of the holding part 111.

[0045] Reference Figure 7 , the switching button 230a is disposed in front of the second section 115 of the grip portion 111.

[0046] As an alternative embodiment, reference is made to Figure 8 , the switching button 230a is disposed at the rear end of the second section 115 of the grip portion 111 and is disposed adjacent to the second button 220a, and the distance between the switching button 230a and the second button 220a is set to be less than or equal to 30 mm.

[0047] In the third example of the present invention, reference is made to Figure 9 and Figure 10 , the second button 220b is disposed above or on the side of the head shell 112.

[0048] Reference Figure 9 , the switching button 230b is disposed in the second section 115 of the grip portion 111 and is disposed in front of the grip portion 111. The switching button 230b is disposed above the power connection portion 113 and is located below the first button 210b.

[0049] As an alternative embodiment, reference is made to Figure 10 , the second button 220b is disposed above or on the side of the head shell 112. The switching button 230b is disposed adjacent to the second button 220b, and the distance between the switching button 230b and the second button 220b is set to be less than or equal to 30 mm.

[0050] In the fourth example of the present invention, reference is made to Figure 11 , the second button 220c is disposed in the first section 114 of the grip portion 111 and is located at the side end of the grip portion 111.

[0051] In the fifth example of the present invention, the hand-held impact tool 100 further includes a third button. The changeover switch 160 can switch the hand-held impact tool 100 to a first state, a second state, and a 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. Thus, in the first state, the second button 220 and the third button cannot control the operation of the motor 130. In the second state, the first button 210 and the third button cannot control the operation of the motor 130. The second button 220 is disposed at the rear of the grip portion 111, and the third button is disposed above the head shell 112.

[0052] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and all technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A handheld impact tool, comprising: A motor; A housing for supporting the motor, the housing including a grip portion for holding; An output portion provided at the front end of the housing; It is characterized in that: The handheld impact tool further includes: A control unit for controlling the operation of the motor; A first button provided at the front end of the grip portion; A second button provided on the housing; A toggle button provided on the housing; the toggle button is used to switch the handheld impact tool to a first state or a second state; Wherein, when the handheld impact tool is in the first state, the first button controls the operation of the motor; When the toggle button switches the handheld impact tool to the second state, the second button controls the start and stop of the motor; the functions of the first button and the second button are the same, and both can control all working states of the handheld impact tool; wherein, in the first state, the output portion faces forward; in the second state, the output portion faces backward.

2. The hand-held impact tool according to claim 1, characterized in that: The second button is provided at the rear end of the grip portion.

3. The hand-held impact tool according to claim 1, characterized in that: The housing includes: a head shell and a power connection portion; wherein, the head shell is provided above the grip portion; the power connection portion is provided below the grip portion; the grip portion includes a first section connecting the head shell and a second section connecting the power connection portion, the second button is provided on the first section and at the rear end of the grip portion.

4. The hand-held impact tool according to claim 3, characterized in that: The second button is provided at the rear end of the grip portion at a position opposite to the first button.

5. The hand-held impact tool according to claim 1, wherein: The housing includes: a head shell and a power connection portion; wherein, the head shell is provided above the grip portion, the power connection portion is provided below the grip portion, the grip portion includes a first section connecting the head shell and a second section connecting the power connection portion, the second button is provided on the second section and at the rear end of the grip portion.

6. The hand-held impact tool according to claim 1, characterized in that: The housing includes: a head shell and a power connection portion; wherein, the head shell is provided above the grip portion, the power connection portion is provided below the grip portion, the grip portion includes a first section connecting the head shell and a second section connecting the power connection portion, the second button is provided on the first section and at the side end of the grip portion.

7. The hand-held impact tool according to claim 1, characterized in that: The housing includes: a head shell and a power connection portion; wherein, the head shell is provided above the grip portion, and the second button is provided above the head shell.

8. The hand-held impact tool according to any one of claims 1 to 7, characterized in that: The toggle button is provided in front of the grip portion and below the first button.

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

10. The hand-held impact tool according to claim 1, characterized in that: The handheld impact tool further includes: a first switch, a second switch and a toggle switch; wherein, the first switch can be triggered by the first button, the second switch can be triggered by the second button, and the toggle switch can be triggered by the toggle button.

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