Grinding machine

Abstract

A grinding tool machine has a tool machine body, a motor, a first air flow generating member, a grinding disc, and a dust collecting member connected to the tool machine body. The dust collecting member includes a dust collecting cover facing the grinding disc and a dust collecting connecting pipe connected to the dust collecting cover. The first air flow generating member generates a first air flow flowing from the dust collecting cover to the dust collecting connecting pipe when the first air flow generating member is activated. The grinding tool machine has at least one air inlet provided on the tool machine body, a passage communicating with the dust collecting connecting pipe, and a second air flow generating member provided on the passage. The second air flow generating member generates a second air flow flowing from the at least one air inlet to the dust collecting connecting pipe when the second air flow generating member is activated. The second air flow and the first air flow jointly form a dust collecting air flow.

Description

Technical Field

[0001] This invention relates to a grinding tool machine, and more particularly to a grinding tool machine that improves dust collection efficiency. Background Technology

[0002] When a grinding machine performs grinding operations, its grinding disc polishes the workpiece to reduce its surface roughness without damaging its shape. During the grinding process, a significant amount of dust is generated on the workpiece surface. This dust can easily disperse into the working environment, affecting operations and safety.

[0003] To improve the working environment, current handheld grinding tools generally incorporate airflow generators in their bodies to collect dust. The aim is to use the airflow generated when these generators are activated to collect dust within the grinding hood. However, the airflow generated by these generators is insufficient, resulting in poor dust collection efficiency.

[0004] To address the aforementioned issues, current grinding machine tools have developed a technical solution incorporating a dust collection device. This device actively draws air towards the dust collection hood upon startup, compensating for the shortcomings of relying solely on an airflow generator, as disclosed in CN 112933791A. However, the dust collection device is connected to the grinding machine via a suction hose, which limits the working range of the grinding machine due to the length of the hose, resulting in poor flexibility. Furthermore, the assembly position of the dust collection device in this solution is restricted; it is only located at the end of the dust collection path. If the dust collection device is positioned in the middle of the dust collection path (as in CN 112933791A), the situation becomes problematic. Figure 3 As revealed, the vacuum cleaner is easily damaged by dust on the dust collection path. Furthermore, the vacuum cleaner is difficult for the user to replace easily. Summary of the Invention

[0005] The main objective of this invention is to solve the problem of poor dust collection efficiency in conventional grinding tools that use airflow-generating components for dust collection.

[0006] To achieve the above objectives, the present invention provides a grinding machine, comprising a machine body, a motor disposed on the machine body, a first airflow generator rotating with the motor, a grinding disc rotating with the motor, and a dust collection component connected to the machine body. The dust collection component includes a dust collection hood facing the grinding disc and a dust collection connecting pipe connected to the dust collection hood. When the first airflow generator is activated, it generates a first airflow flowing from the dust collection hood to the dust collection connecting pipe. Further, the grinding machine has at least one air inlet disposed on the machine body, a channel communicating with the dust collection connecting pipe, and a second airflow generator disposed on the channel. When the second airflow generator is activated, it generates a second airflow flowing from the at least one air inlet through the channel to the dust collection connecting pipe. The second airflow and the first airflow together form a dust-collecting airflow.

[0007] In one embodiment, the second airflow generating element has an air inlet side and an air outlet side, the air outlet side facing the dust collection connection pipe away from the dust collection hood.

[0008] In one embodiment, the dust collection connection pipe has an extension line, and the angle between the axis of the second airflow generating element and the extension line is less than 90 degrees.

[0009] In one embodiment, the machine tool body has a head with the motor and a grip portion connected to the head, and at least one air inlet is provided in the grip portion.

[0010] In one embodiment, the machine tool body has a mounting base disposed in the passage and providing the second airflow generating element.

[0011] In one embodiment, the dust collection connection pipe has an opening that connects to the channel and faces the second airflow generator.

[0012] In one embodiment, the grinding machine has an electronic control module disposed inside the machine body and electrically connected to the motor, at least a portion of the electronic control module being located on the second airflow path between the at least one air inlet and the channel.

[0013] In one embodiment, the grinding machine has a partition disposed inside the machine body and electrically connected to the motor. The interior of the machine body is divided, at least based on the partition, into a first mounting space for the motor and a second mounting space connected to the at least one air inlet.

[0014] In one embodiment, the first mounting space and the second mounting space are specifically isolated inside the machine tool body based on the connection between the partition and the electronic control module.

[0015] In one embodiment, part of the electronic control module is located in the first mounting space, and the remainder is located in the second mounting space. The grinding tool has at least one heat dissipation hole located on the tool body and communicating with the first mounting space.

[0016] In one embodiment, the grinding tool has at least one heat dissipation fin assembly connected to the electronic control module and facing the at least one heat dissipation hole.

[0017] In one embodiment, the dust collection connecting pipe has a first port connected to the dust collection hood and a second port opposite to the first port, and the dust collection component has a dust collection pipe connected to the second port and connected to the dust collection hood via the dust collection connecting pipe, and a dust collection bag connected to the dust collection pipe.

[0018] In one embodiment, the first airflow generating element has a plurality of first blades facing the grinding disc and a plurality of second blades facing the motor.

[0019] In one embodiment, the machine tool body has a head with the motor and a gripping part connected to the head, and the grinding machine has at least one vent hole on the side of the head near the grinding disc of the machine tool body.

[0020] As disclosed in the foregoing invention, compared with conventional technology, the present invention has the following features: The grinding machine of the present invention is provided with the channel and the second airflow generating component. After the second airflow generating component is activated, it generates the second airflow. The second airflow assists the first airflow and together forms the dust-collecting airflow, so that the dust-collecting airflow can be collected, thereby improving the problem of poor dust collection ability of conventional grinding machines. Attached Figure Description

[0021] Figure 1 A three-dimensional schematic diagram of an embodiment of the present invention;

[0022] Figure 2 An exploded perspective view of an embodiment of the present invention (I);

[0023] Figure 3 An exploded perspective view (II) of an embodiment of the present invention;

[0024] Figure 4 An exploded perspective view (III) of an embodiment of the present invention;

[0025] Figure 5 A cross-sectional schematic diagram of an embodiment of the present invention;

[0026] Figure 6 A planar exploded view of an embodiment of the present invention;

[0027] Figure 7 A schematic diagram of an embodiment of the present invention.

[0028] [Symbol Explanation]

[0029] 20: Grinding machine tool

[0030] 21: Machine tool body

[0031] 211: Head

[0032] 212: Grip section

[0033] 214: First Installation Space

[0034] 215: Second installation space

[0035] 22: Motor

[0036] 23: First airflow generating component

[0037] 231: First blade

[0038] 232: Second blade

[0039] 24: Grinding disc

[0040] 25: Dust collection components

[0041] 251: Dust Collection Cover

[0042] 252: Dust collection connection pipe

[0043] 253: Extension line

[0044] 254: Opening

[0045] 255: Installing the inclined plane

[0046] 256: Installation port

[0047] 257: First port

[0048] 258: Second port

[0049] 26: Eccentric block

[0050] 27: Air Inlet

[0051] 28: Channel

[0052] 29: Second airflow generating component

[0053] 291: Air Inlet Side

[0054] 292: Air outlet side

[0055] 293: Axis

[0056] 30: Mounting bracket

[0057] 31: Electronic control module

[0058] 32: partition

[0059] 33: Ventilation holes

[0060] 34: Heat dissipation fin assembly

[0061] 36: Vent hole

[0062] 40: Dust collection pipe

[0063] 401: Pipe Fittings

[0064] 402: Screw-in structure

[0065] 41: Dust collection bag

[0066] 411: Bag opening

[0067] 412: Connecting pipe

[0068] 50: First airflow

[0069] 60: Second airflow

[0070] 70: Dust collection airflow Detailed Implementation

[0071] The detailed description and technical content of this invention are now explained in conjunction with the accompanying drawings:

[0072] Please see Figures 1 to 4 This invention provides a grinding tool 20, which is a handheld grinding tool and is equipped with a dust collection pipe 40 and a dust collection bag 41. The grinding tool 20 includes a tool body 21, a motor 22 disposed on the tool body 21, a first airflow generating component 23 rotating with the motor 22, a grinding disc 24 rotating with the motor 22, and a dust collection component 25 disposed on the tool body 21. When the grinding tool 20 is started, it drives the motor 22 to work, thereby causing the first airflow generating component 23 and the grinding disc 24 to rotate. In this invention, the grinding machine tool 20 further includes an eccentric block 26 connected to the motor 22. The eccentric block 26 provides the first airflow generating component 23 for assembly and is connected to the grinding disc 24. The eccentric block 26 is driven by the motor 22, thereby driving the first airflow generating component 23 and the grinding disc 24, so that the first airflow generating component 23 and the grinding disc 24 can rotate with the motor 22. It should be noted that the description of rotating with the motor 22 does not mean that the rotational speed of the first airflow generating component 23 and the grinding disc 24 is the same as that of the motor 22, but rather that the first airflow generating component 23 and the grinding disc 24 stop rotating in accordance with the working state of the motor 22.

[0073] Additionally, please see Figures 1 to 4The dust collection component 25 includes a dust collection cover 251 facing the grinding disc 24 and a dust collection connecting pipe 252 connecting the dust collection cover 251. The dust collection cover 251 and the dust collection connecting pipe 252 can be integrally formed or selectively assembled components. Furthermore, the dust collection cover 251 has a mounting port 256 for connecting to the machine tool body 21, and the dust collection connecting pipe 252 has at least one first port 257 connecting to the dust collection cover 251 and a second port 258 opposite to the first port 257. The second port 258 is connected to the dust collection pipe 40, so that the dust collection pipe 40 communicates with the dust collection cover 251 via the dust collection connecting pipe 252. Furthermore, the dust collection bag 41 is a replaceable component. The dust collection bag 41 has a bag opening 411, which can be directly formed on the dust collection bag 41 or formed on a connecting tube (as shown by reference numeral 412). The dust collection bag 41 can be selectively connected to the dust collection pipe 40. In one embodiment, the dust collection pipe 40 can be assembled from multiple pipe fittings 401, which can be assembled using at least one screw connection structure 402.

[0074] Please see again Figures 2 to 7 The grinding machine tool 20 of the present invention has at least one air inlet 27 disposed on the machine tool body 21, a channel 28 communicating with the dust collection connection pipe 252, and a second airflow generating element 29 disposed on the channel 28. The channel 28 communicates with the at least one air inlet 27 through the interior of the machine tool body 21. The second airflow generating element 29 may be located inside the channel 28 or connected to the channel 28. The positional relationship between the second airflow generating element 29 and the channel 28 is not limited, but it is necessary for the second airflow generating element 29 to draw gas from the at least one air inlet 27 through the channel 28 and the interior of the machine tool body 21 after it is activated.

[0075] Please see again Figure 7 When the grinding machine 20 is started, the motor 22 starts and drives the first airflow generator 23 and the grinding disc 24 to rotate. At this time, the grinding disc 24 can grind a workpiece (not shown). The first airflow generator 23 generates a first airflow 50, which flows from the dust collection hood 251 to the dust collection connecting pipe 252. At the same time, the second airflow generator 29 starts and generates a second airflow 60, which flows from the at least one air inlet 27 through the channel 28 to the dust collection connecting pipe 252. Subsequently, the second airflow 60 and the first airflow 50 merge to form a dust collection airflow 70, which flows towards the dust collection pipe 40 and is collected in the dust collection bag 41, just as... Figure 7 As shown.

[0076] As described above, the grinding tool 20 of the present invention is a handheld grinding tool that uses the dust collection bag 41 to collect dust. The grinding tool 20 is provided with the channel 28 and the second airflow generator 29. After activation, the second airflow generator 29 generates a second airflow 60. The second airflow 60 assists the first airflow 50 to form the dust-collecting airflow 70, which flows towards the dust collection pipe 40 and is collected in the dust collection bag 41, thereby improving the problem of poor dust collection ability of conventional handheld grinding tools. In addition, the grinding tool 20 of the present invention, when implemented with the dust collection bag 41, not only has the advantage of being replaceable according to user needs, but also allows for greater user flexibility compared to conventional grinding tools with a vacuum cleaner, and eliminates the limitation on the working range caused by the vacuum cleaner.

[0077] Please refer to the following: Figures 5 to 7 To improve dust collection efficiency, in one embodiment of the present invention, the second airflow generator 29 has an air inlet side 291 and an air outlet side 292. The air inlet side 291 and the air outlet side 292 are opposite to each other. The air inlet side 291 faces the interior of the machine tool body 21 to draw gas into the machine tool body 21, while the air outlet side 292 faces the dust collection connecting pipe 252 away from the dust collection hood 251 to provide airflow to the side of the dust collection pipe 40 closer to the dust collection bag 41. More specifically, the dust collection connecting pipe 252 has an extension line 253, and the angle between the axis 293 of the second airflow generator 29 and the extension line 253 is less than 90 degrees.

[0078] On the other hand, please see Figures 5 to 7 The machine tool body 21 of the present invention has a head 211 with the motor 22 and a grip portion 212 connected to the head 211, and at least one air inlet 27 is provided in the grip portion 212. Furthermore, the machine tool body 21 has a mounting base 30 provided in the channel 28, the mounting base 30 providing a second airflow generator 29 for placement therein, allowing the second airflow 60 generated by the second airflow generator 29 to flow into the dust collection connecting pipe 252. In this embodiment, the dust collection connecting pipe 252 has an opening 254 communicating with the channel 28, the opening 254 facing the second airflow generator 29 and receiving the second airflow 60. Further, to facilitate the installation of the second airflow generator 29, the dust collection connecting pipe 252 has an installation slope 255 provided in the opening 254.

[0079] In another embodiment, the grinding tool 20 has an electronic control module 31 disposed within the tool body 21. The electronic control module 31 is electrically connected to the motor 22 and drives the motor 22 to operate. At least a portion of the electronic control module 31 is located on the path of the second airflow 60 between the at least one air inlet 27 and the channel 28. Thus, when the second airflow generator 29 is activated, improving the dust collection efficiency of the grinding tool 20, the electronic control module 31 is cooled.

[0080] Please see again Figure 5 The grinding machine tool 20 of the present invention has a partition 32 disposed inside the machine tool body 21. The interior of the machine tool body 21 is divided, at least by the partition 32, into a first mounting space 214 for housing the motor 22 and a second mounting space 215 communicating with the at least one air inlet 27. The second mounting space 215 allows the second airflow generator 29 to draw in external gas through the at least one air inlet 27 when it is activated. Furthermore, the connection between the partition 32 and the electronic control module 31 inside the machine tool body 21 specifically isolates the first mounting space 214 and the second mounting space 215, so that the first mounting space 214 and the second mounting space 215 are not communicating, allowing the second airflow generator 29 to draw in external gas only through the second mounting space 215 and the at least one air inlet 27.

[0081] In one embodiment, please refer to Figures 5 to 7 The electronic control module 31 is partially located in the first mounting space 214, and the remainder is located in the second mounting space 215. The grinding tool 20 has at least one heat dissipation hole 33 on the tool body 21, which connects to the first mounting space 214 but not to the channel 28. When the first airflow generator 23 is activated, it draws gas from the at least one heat dissipation hole 33 through the first mounting space 214, allowing the first airflow 50 to dissipate heat from the electronic control module 31. It should be noted that due to the partition 32, the at least one heat dissipation hole 33 is not connected to the channel 28, and the second airflow generator 29 cannot draw external gas through the at least one heat dissipation hole 33. Furthermore, to improve the heat dissipation of the electronic control module 31, in one embodiment, the grinding machine 20 has at least one heat dissipation fin assembly 34 connected to the electronic control module 31. This at least one heat dissipation fin assembly 34 is positioned facing the at least one heat dissipation hole 33 and is located in the path of the first airflow 50. In practice, the at least one heat dissipation fin assembly 34 receives heat energy from the electronic control module 31 and is also cooled by the first airflow 50, thereby enabling the electronic control module 31 to dissipate heat.

[0082] On the other hand, please see Figures 5 to 7In addition to providing dust collection, the first airflow generating component 23 of the present invention also provides heat dissipation. In one embodiment, the first airflow generating component 23 has a plurality of first fan blades 231 facing the grinding disc 24 and a plurality of second fan blades 232 facing the motor 22. In this embodiment, the grinding tool 20 further has at least one vent 36 located on the side of the head 211 of the tool body 21 near the grinding disc 24, and the at least one vent 36 allows the first airflow 50 generated by the first airflow generating component 23 to flow therethrough.

Claims

1. A grinding machine, comprising a machine body, a motor disposed on the machine body, a first airflow generating element rotating with the motor, a grinding disc rotating with the motor, and a dust collection element connected to the machine body, the dust collection element comprising a dust collection hood facing the grinding disc and a dust collection connecting pipe connected to the dust collection hood, wherein the first airflow generating element, when activated, forms a first airflow flowing from the dust collection hood to the dust collection connecting pipe, characterized in that: The grinding tool has at least one air inlet on the machine body, a channel connecting the dust collection connection pipe, and a second airflow generator on the channel. When the second airflow generator is activated, a second airflow is generated from the at least one air inlet through the channel to the dust collection connection pipe. The second airflow and the first airflow together form a dust collection airflow.

2. The grinding tool machine as described in claim 1, characterized in that, The second airflow generating component has an air inlet side and an air outlet side, with the air outlet side facing away from the dust collection hood from the dust collection connection pipe.

3. The grinding machine tool as described in claim 2, characterized in that, The dust collection connection pipe has an extension line, and the angle between the axis of the second airflow generating element and the extension line is less than 90 degrees.

4. The grinding machine tool as described in claim 3, characterized in that, The machine tool body has a head with the motor and a grip connected to the head, and at least one air inlet is provided in the grip.

5. The grinding tool machine as described in claim 4, characterized in that, The machine tool body has a mounting base located in the passage and providing the second airflow generating element.

6. The grinding machine tool as described in claim 5, characterized in that, The dust collection connection pipe has an opening that connects to the channel and faces the second airflow generating element.

7. The grinding machine tool as described in claim 4, characterized in that, The grinding machine tool has an electronic control module disposed inside the machine tool body and electrically connected to the motor, at least a portion of which is located on the second airflow path between the at least one air inlet and the channel.

8. The grinding machine tool as described in claim 7, characterized in that, The grinding machine tool has a partition located inside the machine tool body, which divides the interior of the machine tool body into a first mounting space for the motor and a second mounting space connected to the at least one air inlet, based on the partition.

9. The grinding machine tool as described in claim 8, characterized in that, The machine tool body internally isolates the first installation space from the second installation space based on the connection between the partition and the electronic control module.

10. The grinding machine tool as described in claim 9, characterized in that, Part of the electronic control module is located in the first mounting space, and the rest is located in the second mounting space. The grinding tool has at least one heat dissipation hole located on the tool body and communicating with the first mounting space.

11. The grinding machine tool as described in claim 10, characterized in that, The grinding tool has at least one heat dissipation fin assembly connected to the electronic control module and facing the at least one heat dissipation hole.

12. The grinding machine tool as described in claim 1, characterized in that, The dust collection connector has a first port connected to the dust collection hood and a second port opposite to the first port. The dust collection component has a dust collection pipe connected to the second port and connected to the dust collection hood via the dust collection connector, and a dust collection bag connected to the dust collection pipe.

13. The grinding machine tool as described in claim 1, characterized in that, The first airflow generating component has multiple first blades facing the grinding disc and multiple second blades facing the motor.

14. The grinding machine tool as described in claim 13, characterized in that, The machine tool body has a head with the motor and a gripping part connected to the head. The grinding machine tool has at least one vent hole on the side of the head near the grinding disc of the machine tool body.

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