CN217372244U

CN217372244U - Electric tool

Info

Publication number: CN217372244U
Application number: CN202221440921.6U
Authority: CN
Inventors: 赵冀; 林�智; 沈琼; 陈志强; 俞磊; 赵春焕
Original assignee: Bosch Power Tools China Co Ltd
Current assignee: Bosch Power Tools China Co Ltd
Priority date: 2022-06-09
Filing date: 2022-06-09
Publication date: 2022-09-06
Anticipated expiration: 2032-06-09
Also published as: WO2023236707A1

Abstract

The utility model relates to an electric tool, which comprises an external control unit (80) and a tool main body (10) which are separated from each other, wherein the external control unit (80) comprises an external communication module (86) and an external sensor (82) used for measuring the real-time value of the external environmental parameter, the tool main body (10) is accommodated with a motor (52) and a transmission mechanism (42), an internal communication module (58) communicatively coupled to the external communication module (86), and a circuit board (56) configured to place the power tool in an optimal operating parameter for a current operating mode of the at least one operating mode, the power tool further including a processor (84) configured to determine the optimal operating parameter based on a real-time value of the external environmental parameter, the processor (84) is electrically connected between the external communication module (86) and the external sensor (82) or between the internal communication module (58) and the circuit board (56).

Description

Electric tool

Technical Field

The utility model relates to an electric tool.

Background

In high altitude environments, air pressure is low and many power tools do not operate reliably. For example, hammers or hammer drills with air chambers cannot maintain normal operation when the air pressure is low. One solution is to incorporate a barometer within the power tool to sense the air pressure of the environment of use and thereby vary the operating parameters of the power tool based on the local air pressure.

However, adding a sensor like a barometer and associated components can increase the cost of the power tool, especially for most customers not in high altitude areas where adding a sensor can cause unnecessary waste and cost. On the other hand, power tools can generate severe vibrations during operations such as hammering, which can shatter sensors, such as barometers.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a to be used for measuring the sensor of external environment parameter such as barometer etc. and set up on electric tool's external control unit and solved above-mentioned technical problem.

The above object is achieved by the power tool of the present application. The electric tool of the present application has at least one operation mode including at least a hammer mode capable of outputting impact motion, the electric tool including an external control unit and a tool main body separated from each other, the external control unit including an external communication module and an external sensor for measuring a real-time value of an external environmental parameter, the tool main body accommodating a motor, a transmission mechanism connected to the motor, an internal communication module communicatively connected to the external communication module, and a circuit board capable of placing the electric tool in an optimum operation parameter for a current operation mode in the at least one operation mode, the electric tool further including a processor capable of determining the optimum operation parameter based on the real-time value of the external environmental parameter, the processor being electrically connected between the external communication module and the external sensor and the internal communication module and the circuit board being electrically connected, or the processor is electrically connected between the internal communication module and the circuit board, and the external communication module is electrically connected with the external sensor.

In one embodiment, the tool body comprises a transmission housing portion for housing the transmission mechanism and a motor housing portion for housing the motor, the motor housing portion being arranged transversely to the transmission housing portion.

In one embodiment, the circuit board is received in the motor receiving portion.

In one embodiment, the processor is electrically connected between the external communication module and the external sensor, and the internal communication module is electrically connected with or integrated with the circuit board via a wire.

In one embodiment, the tool body further comprises a C-shaped main handle, the main handle comprises a grip portion for being gripped by a user and two connection ends extending from the grip portion and connected to the transmission accommodating portion and the motor accommodating portion of the tool body, respectively, and the grip portion is provided with a communication switch for controlling communication connection between the internal communication module and the external communication module.

In one embodiment, the external sensor comprises at least one of: the dust concentration sensor is used for measuring the dust concentration in the external environment.

In one embodiment, the communication connection between the internal communication module and the external communication module is implemented wirelessly in a WIFI, bluetooth or NFC manner, or is implemented in a wired manner.

In one embodiment, the external control unit is one of a cell phone, a bracelet, a watch, and a gateway controller.

In one embodiment, the power tool is a hammer or hammer drill including an air chamber.

In one embodiment, the at least one operating mode further comprises a drill mode capable of outputting rotational motion and a hammer drill mode capable of outputting rotational motion and percussive motion.

The sensor for measuring the external environmental parameters, such as the barometer, is arranged on the external control unit of the electric tool, and only the switch or the control button is arranged on the electric tool, so that the problem that the sensor (such as the barometer) can be damaged by vibration when the electric tool is operated is solved, the cost of the electric tool is reduced, and the practicability and the universality of the electric tool are higher.

Drawings

Fig. 1 is a simplified schematic diagram of an electric power tool according to a first embodiment of the present invention.

Fig. 2 is a simplified schematic diagram of a power tool according to a second embodiment of the present invention.

Detailed Description

The electric tool is particularly suitable for the electric tool which is greatly influenced by the change of the external environment and can be normally used only by changing the operating parameters when the external environment changes greatly. A common electric tool of this type may include a hammer or a hammer drill having an air chamber and thus being greatly affected by air pressure of an external environment, a dust collector greatly affected by dust concentration in the external environment, an electric tool greatly affected by temperature change of the external environment, and the like, but the principle itself is not limited thereto. The power tool of the present application may provide one or more modes of operation.

Fig. 1 and 2 show two embodiments of a hammer as an example of a power tool, wherein the same reference numerals denote the same parts. The illustrated hammer may be a hammer that outputs only percussive motion, or may be a hammer drill that outputs percussive and/or drilling motion. The illustrated hammer may provide at least a hammer mode that outputs percussive motion, and optionally a drill mode that outputs rotary motion and a hammer drill mode that outputs percussive and rotary motion.

Referring to fig. 1, the overall structure of a hammer 100 is shown in simplified form. The hammer 100 generally includes a tool body 10, and a main handle 20 and an auxiliary handle 30 connected to the tool body 10.

The tool body 10 has a generally L-shaped configuration including a transmission housing 40 extending along the drive axis a1 and a motor housing 50 extending generally transverse (e.g., generally perpendicular) to the drive axis a 1. Along the drive axis a1, the transmission housing 40 includes a front end 40a to which a tool holder 60 configured for mounting or attaching a tool (not shown in the figures), such as a drill or punch, is attached and an opposite rear end 40 b. The transmission mechanism 42 is schematically illustrated in fig. 1 within the transmission mechanism housing 40 and the motor 52 is located in the motor housing 50, the transmission mechanism 42 being connected to an output shaft 54 of the motor 52 and being driven by the output shaft 54.

A circuit board 56 for controlling the operating parameters of the hammer 100 is also housed within the motor housing 50 of the tool body 10, for example, the circuit board 56 is disposed within the motor housing 50 on the opposite side of the motor 52 from the output shaft 54. In the embodiment of fig. 1, a built-in communication module 58 is also disposed in the motor housing 50 and is configured for electrical connection with the circuit board 56. The operating parameters of the hammer 100 controlled by the circuit board 56 include output parameters such as the impact force and/or frequency of impact of the ram of the hammer 100 or the rotational speed of the drill bit.

The main handle 20 is a hollow body of a general C shape. In the present embodiment, the main handle 20 includes a grip portion 22, and connecting

portions

24, 26 extending from both ends thereof substantially transversely to the grip portion 22 and for connecting to the tool body 10. The grip portion 22 is a portion gripped by a user, and extends in a direction transverse to the drive axis a1, for example, in a substantially orthogonal direction. The connecting portion 24 is connected to the rear end 40b of the transmission housing portion 40 of the tool body 10, and the connecting portion 26 is connected to the motor housing portion 50 of the tool body 10. The main handle 20 also includes a switch 25 for user operation, the switch 25 being communicatively connected to the circuit board 56 for control operation. A trigger 28 for actuating the power tool is also provided on the main handle 20.

The auxiliary handle 30 includes a grip portion 32, an abutment portion 34, and a strap 36. The grip portion 32 is a substantially elongated portion to be gripped by a user with one hand. The contact portion 34 is a portion protruding from the grip portion 32, for example, a hollow portion. For example, the abutment 34 has a surface that conforms to a portion (e.g., the lower portion as shown) of the outer peripheral surface of the transmission housing 40. The belt 36 is formed in a ring shape. A portion of the strap 36 is received within the abutment 34 and is connected to the abutment 34 by any suitable means known in the art (e.g., bolted) with the remainder protruding from the abutment 34 and encircling a portion of the outer peripheral surface (e.g., the upper portion as shown) of the transmission housing 40.

The hammer 100 also includes an external control unit 80. The external control unit 80 may include an external sensor 82 for measuring an external environmental parameter, and an external processor 84 communicatively connected to the external sensor 82 and configured to select or determine an optimal operating parameter for a current operating mode of the hammer 100 (one of the aforementioned hammer, drill and hammer drill modes) based on a real-time value of the external environmental parameter it measures. For example, the external sensors 82 may be one or more of the following: a barometer for measuring ambient atmospheric pressure, a thermometer for measuring ambient temperature, and a dust concentration meter for measuring ambient dust concentration. Alternatively, the external processor 84 may store therein a mapping table between the external environment parameter and the optimal operation parameter for each operation mode, which may be a two-dimensional mapping table between the environment parameter and the optimal operation parameter, or a multi-dimensional mapping table between a plurality of environment parameters and the optimal operation parameter.

The external control unit 80 also includes an external communication module 86 for communicatively coupling with the internal communication module 58 to communicate the selected or determined optimal operating parameters to the internal communication module 58. Communication between the external communication module 86 and the internal communication module 58 may be achieved through any known form, such as a wireless communication connection, such as WIFI, bluetooth, or NFC, or a wired communication connection. The external control unit 80 may be a mobile phone, a bracelet or a watch, equipped with a suitable APP (application), or may be configured as a separate remote control or gateway controller.

In an embodiment not shown in the figures, the external processor 84 used to select or determine the optimal operating parameters for the current operating mode based on the real-time values of the environmental parameters measured by the sensors 82 may alternatively be replaced by an internal processor disposed within the hammer 100. At this time, the external sensor 82 is directly connected to the external communication module 86 in a communication manner, so that the external communication module 86 transmits the real-time value of the environmental parameter measured by the external sensor 82 to the internal communication module 58, and the internal communication module 58 is connected to the internal processor in a communication manner so that the latter obtains the real-time value of the environmental parameter received by the former. The built-in processor is also electrically connected to the circuit board 56 to provide the determined optimal operating parameters to the circuit board 56, which the circuit board 56 controls the power tool to place in or switch to for proper operation. At this point, the signal transmitted between the internal communication module 58 and the external communication module 86 is a real-time value of the environmental parameter, rather than the optimal operating parameter of FIG. 1. Preferably, the processor 84 is disposed within the external control unit 80 as shown, which helps to reduce the data processing or computational burden on the power tool itself, simplifying the design of the internal circuit board of the power tool.

In the embodiment of fig. 1, the built-in communication module 58 is provided separately from the circuit board 56 and is electrically connected together by any suitable means, such as by electrical wiring 57.

The second embodiment shown in fig. 2 differs from the first embodiment only in that the built-in communication module 58 is integrated with the circuit board 56 without additionally fixing parts of the built-in communication module 58. Alternatively, an internal processor in place of the external processor 84 may be integrated into the circuit board 56.

A hammer constructed in accordance with the principles of the present application is described above with reference to the embodiment of fig. 1 and 2. While the present application is exemplified with a pneumatic hammer drill including three modes of operation (i.e., hammer mode, drill mode, and hammer drill mode), those skilled in the art will appreciate that the principles of the present application are not so limited. The present application is particularly advantageous when the power tool is a power tool providing a plurality of operating modes including an impact mode as described above, since the impact mode inevitably causes vibration of the power tool itself, and the arrangement of the present application effectively avoids the occurrence of a phenomenon in which various sensors, which are sensitive in response and/or fragile in themselves, are affected by vibration to generate a large error or fail to operate normally or even be shattered.

The electric tool comprises an internal communication module and an external control unit which are arranged in a tool main body 10, wherein the external control unit comprises an external sensor used for measuring environmental parameters and an external communication module used for being in communication connection with the internal communication module, and the electric tool further comprises an internal or external processor. The external sensors of the external control unit are used to measure the environment such as air pressure, temperature or any other desired environmental parameter. The sensor is externally arranged instead of being arranged on the air hammer body, and information of the externally arranged control unit is transmitted to the tool main body of the electric tool through a communication mode such as Bluetooth and the like known in the art, so that the structure of the electric tool is simplified, the cost of the air hammer is reduced, and the possibility that the sensor can be damaged (for example, vibrated) by vibration generated by the operation of the sensor when the sensor is arranged on the electric tool is avoided. The processor for selecting the corresponding optimal operating parameter based on the measured environmental parameter may be disposed on the external control unit as in the illustrated embodiment, and the communication module transmits a signal representing the optimal operating parameter; the processor may also be disposed within the power tool, where the communication module transmits a signal representative of a parameter value corresponding to the measured environmental parameter.

While the specific examples have been described above with reference to the accompanying drawings, it will be apparent to those skilled in the art that the present invention is not limited to the specific examples described above. Numerous changes may be made in the specific configuration without departing from the scope of the present invention, which is defined in the claims that follow.

Claims

1. An electric tool having at least one operating mode including at least a hammer mode capable of outputting a percussive motion, characterized in that the electric tool comprises an external control unit (80) and a tool body (10) separated from each other, wherein the external control unit (80) comprises an external communication module (86) and an external sensor (82) for measuring a real-time value of an external environmental parameter, wherein the tool body (10) houses a motor (52), a transmission (42) connected to the motor, an internal communication module (58) communicatively connected to the external communication module (86), and a circuit board (56) capable of placing the electric tool in an optimal operating parameter for a current operating mode of the at least one operating mode, and wherein the electric tool further comprises a processor capable of determining the optimal operating parameter based on the real-time value of the external environmental parameter (84) The processor (84) is electrically connected between the external communication module (86) and the external sensor (82) and the internal communication module (58) and the circuit board (56) or the processor (84) is electrically connected between the internal communication module (58) and the circuit board (56) and the external communication module (86) and the external sensor (82).

2. The power tool according to claim 1, characterized in that the tool body (10) comprises a transmission housing (40) for accommodating the transmission (42) and a motor housing (50) for accommodating the motor (52), the motor housing (50) being arranged transversely to the transmission housing (40).

3. The power tool according to claim 2, wherein the circuit board (56) is received in the motor receiving portion (50).

4. The power tool according to claim 3, wherein the processor (84) is electrically connected between the external communication module (86) and the external sensor (82), and the internal communication module (58) is electrically connected to the circuit board (56) via a wire or is integrated into the circuit board (56).

5. The power tool according to any one of claims 1 to 4, wherein the tool body (10) further comprises a C-shaped main handle (20), the main handle (20) comprising a grip portion (22) to be gripped by a user and two connection ends (24, 26) extending from the grip portion (22) and connected to a transmission housing portion (40) and a motor housing portion (50) of the tool body (10), respectively, the grip portion (22) being provided with a communication switch (25) for controlling a communication connection between the internal communication module (58) and the external communication module (86).

6. The power tool according to any one of claims 1-4, wherein the external sensor (82) comprises at least one of: the dust concentration sensor is used for measuring the dust concentration in the external environment.

7. The power tool according to any one of claims 1 to 4, characterized in that the communication connection between the internal communication module (58) and the external communication module (86) is realized wirelessly in the form of WIFI, Bluetooth or NFC or is realized in a wired manner.

8. The power tool of any one of claims 1-4, wherein the external control unit is one of a cell phone, a bracelet, a watch, and a gateway controller.

9. The power tool of any one of claims 1-4, wherein the power tool is a hammer or a hammer drill comprising an air chamber.

10. The power tool of any one of claims 1-4, wherein the at least one operating mode further includes a drill mode capable of outputting rotational motion and a hammer drill mode capable of outputting rotational motion and percussive motion.