GRINDING TOOL MACHINE

FIELD OF THE INVENTION

[0001]The invention relates to a grinding tool machine, particularly a grinding tool machine that enhances dust collection efficiency.

BACKGROUND OF THE INVENTION

[0002]When the grinding tool machine is performing grinding work, the grinding disc of the machine polishes the workpiece, aiming to reduce the surface roughness of the workpiece without damaging its shape. During the grinding process, a large amount of dust will be generated on the workpiece surface, which is prone to disperse into the working environment, affecting both the operation and safety.

[0003]Currently, handheld grinding tool machines are equipped with airflow-generating components to collect dust and improve the working environment. These components are designed to create airflow that collects dust into a grinding shield when activated. However, the airflow generated by these components is insufficient, resulting in poor dust collection performance.

[0004]To address the aforementioned issue, a current technical solution has been developed that pairs a vacuum device with the grinding tool machine. After activation, the vacuum device actively extracts air towards the dust collection shield, compensating for the inadequacy of relying solely on airflow-generating components, as disclosed in CN 112933791A. However, the vacuum device is connected to the grinding tool machine via a vacuum pipe, which limits the range of operation due to the length of the vacuum pipe, making it impossible to freely expand the working area and reducing flexibility. Additionally, the assembly position of the vacuum device is restricted. It is typically located at the end of the dust collection path, and when placed in the middle of the dust collection path (as shown in CN 112933791A, FIG. 3), the vacuum device is easily affected by dust in the collection path, making it prone to damage. Furthermore, the vacuum device is not easily replaceable.

SUMMARY OF THE INVENTION

[0005]A main object of the invention is to solve the problem of poor dust collection efficiency of grinding tools that are conventionally used to collect dust from wind flow generating parts.

[0006]In order to achieve the above objects, the invention provides a grinding tool machine, including a tool body, a motor mounted on the tool body, a first airflow-generating component rotating with the motor, a grinding disc rotating with the motor, and a dust collection component connected to the tool body, the dust collection component includes a dust collection shield facing the grinding disc and a dust collection connection pipe connected to the dust collection shield, the first airflow-generating component generates a first airflow flowing from the dust collection shield towards the dust collection connection pipe upon activation. Further, the grinding tool machine includes at least one air inlet, a passage communicated with the dust collection connection pipe, and a second airflow-generating component attached to the passage, the second airflow-generating component forms a second airflow flowing from the at least one air inlet through the passage towards the dust collection connection pipe upon activation, and the second airflow merges with the first airflow to form a dust collection airflow.

[0007]In one embodiment, the second airflow-generating component includes an intake side and an exhaust side, and the exhaust side faces a direction of the dust collection connection pipe opposite to the dust collection shield.

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

[0009]In one embodiment, the grinding tool machine includes a head portion with the motor, a handle portion connected to the head portion, and the at least one air inlet is located on the handle portion.

[0010]In one embodiment, the tool body includes a mounting base located in the passage and provided for the second airflow-generating component to be disposed therein.

[0011]In one embodiment, the dust collection connecting pipe is provided with an opening communicating with the passage and facing the second airflow-generating component.

[0012]In one embodiment, the grinding tool machine includes an electronic control module located inside the tool body and electrically connected to the motor, at least part of the electronic control module is positioned on a path of the second airflow between the at least one air inlet and the passage.

[0013]In one embodiment, the grinding tool machine includes a partition located at the interior of the tool body, and the interior of the tool body is divided by the partition into a first installation space provided with the motor, and a second installation space connected to the at least one air inlet.

[0014]In one embodiment, the interior of the tool body is substantially isolated between the first installation space and the second installation space by the partition connecting with the electronic control module

[0015]In one embodiment, a part of the electronic control module is located in the first installation space, while a remaining of the electronic control module is in the second installation space, and the grinding tool machine includes at least one heat dissipation hole located in the tool body and communicated with the first installation space.

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

[0017]In one embodiment, the dust collection connection pipe includes at least one first port connected to the dust collection shield and a second port opposite the at least one first port, the dust collection component includes a dust collection tube communicating with the dust collection shield via the dust collection connection pipe, and a dust collection bag connected to the dust collection tube.

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

[0019]In one embodiment, the grinding tool machine includes a head portion with the motor, the grinding tool machine includes at least one ventilation hole located at a side of the head portion of the tool body close to the grinding disc.

[0020]Through the aforementioned implementation of the invention, the invention has the following characteristics compared with the prior art.

[0021]The grinding tool machine of the invention is provided with the second airflow-generating component forms the second airflow flowing upon activation, and the second airflow merges with the first airflow to form the dust collection airflow, allowing the dust collection airflow to be collected, thereby improving the dust collection efficiency of conventional grinding tool machines, which typically have poor dust collection capabilities.

BRIEF DESCRIPTION OF THE DRAWINGS

[0022]FIG. 1 is a three-dimensional schematic diagram of an embodiment of the present invention.

[0023]FIG. 2 is a three-dimensional exploded schematic diagram (1) of an embodiment of the present invention.

[0024]FIG. 3 is a three-dimensional exploded schematic diagram (2) of an embodiment of the present invention.

[0025]FIG. 4 is a three-dimensional exploded schematic diagram (3) of an embodiment of the present invention.

[0026]FIG. 5 is a cross-sectional schematic diagram of an embodiment of the present invention.

[0027]FIG. 6 is a plan exploded schematic diagram of an embodiment of the present invention.

[0028]FIG. 7 is a schematic diagram of an embodiment of the present invention in operation.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029]The detailed description and technical content of the invention are described below with reference to the accompanying extractings.

[0030]Please refer to FIG. 1. FIG. 2, FIG. 3, FIG. 4, and FIG. 5. The invention provides a grinding tool machine 20, which is a handheld tool machine implemented with a dust collection tube 40 and a dust collection bag 41. The grinding tool machine 20 includes a tool body 21, a motor 22 mounted on the tool body 21, a first airflow-generating component 23 that rotates with the motor 22, a grinding disc 24 that rotates with the motor 22, and a dust collection component 25 connected to the tool body 21. When the grinding tool machine 20 is activated, the motor 22 is driven to operate, causing the first airflow-generating component 23 and the grinding disc 24 to rotate. In the invention, the grinding tool machine 20 further includes an eccentric block 26 connected to the motor 22. The eccentric block 26 is provided with the first airflow-generating component 23 for mounting thereon and is connected to the grinding disc 24. The eccentric block 26 is driven by the motor 22 to drive both the first airflow-generating component 23 and the grinding disc 24 to rotate with the motor 22. It is important to note that the term “rotate” in this context does not imply that a rotational speed of the first airflow-generating component 23 and the grinding disc 24 is identical to that of the motor 22. Instead, it refers to the fact that the first airflow-generating component 23 and the grinding disc 24 stop or operate in sync with a working state of the motor 22.

[0031]Please refer to FIG. 1. FIG. 2, FIG. 3, and FIG. 4. The dust collection component 25 includes a dust collection shield 251 facing the grinding disc 24 and a dust collection connection pipe 252 connected to the dust collection shield 251. The dust collection shield 251 and the dust collection connection pipe 252 may either be integrally formed or selectively assembled as separate parts. In one embodiment, the dust collection tube 40 and the dust collection bag 41 may be components belonging to the dust collection component 25. Furthermore, the dust collection shield 251 includes an installation opening 256 connected to the tool body 21. The dust collection connection pipe 252 includes at least one first port 257 connected to the dust collection shield 251 and a second port 258 opposite the at least one first port 257. The second port 258 is connected to the dust collection tube 40, allowing the dust collection tube 40 to communicate with the dust collection shield 251 via the dust collection connection pipe 252. Additionally, the dust collection bag 41 is a replaceable component with a bag mouth 411. The bag mouth 411 may either be directly formed on the dust collection bag 41 or be formed on a connecting pipe (as shown by reference number 412). The dust collection bag 41 can be selectively connected to the dust collection tube 40. In one embodiment, the dust collection tube 40 may consist of multiple tube segments 401, which can be assembled using at least one threaded connection structure 402 (as shown in FIG. 5).

[0032]Please refer to FIG. 2. FIG. 3, FIG. 4, FIG. 5, FIG. 6, and FIG. 7. The grinding tool machine 20 includes at least one air inlet 27 located on the tool body 21, a passage 28 communicating with the dust collection connection pipe 252, and a second airflow-generating component 29 attached to the passage 28. The passage 28 communicates with the at least one air inlet 27 through an interior of the tool body 21. The second airflow-generating component 29 may be positioned within the passage 28 or connected to the passage 28. A positional relationship between the second airflow-generating component 29 and the passage 28 is flexible, provided that, the second airflow-generating component 29 is capable of extracting air from the at least one air inlet 27 through the passage 28 and the interior of the tool body 21, after activation.

[0033]Please refer to FIG. 7. When the grinding tool machine 20 is activated, the motor 22 starts and drives the first airflow-generating component 23 and the grinding disc 24 to rotate. At this point, the grinding disc 24 grinds a workpiece (not shown in the figure), and the first airflow-generating component 23 generates a first airflow 50 flowing from the dust collection shield 251 towards the dust collection connection pipe 252. At the same time, the second airflow-generating component 29 is activated and forms a second airflow 60 flowing from the at least one air inlet 27 through the passage 28 towards the dust collection connection pipe 252. Subsequently, the second airflow 60 merges with the first airflow 50 to form a dust collection airflow 70. The dust collection airflow 70 flows towards the dust collection tube 40 and is collected in the dust collection bag 41, as shown in FIG. 7.

[0034]As can be seen from the above, the grinding tool machine 20 of the invention is a handheld tool machine that uses a dust collection bag 41 to collect dust. The grinding tool machine 20 is provided with the passage 28 and the second airflow-generating component 29. The second airflow-generating component 29 forms the second airflow 60 after activation, and the second airflow 60 assists the first airflow 50 in forming the dust collection airflow 70 flowing toward the dust collection tube 40 and is collected in the dust collection bag 41, thereby improving the problem of insufficient dust collection capabilities of conventional handheld grinding tool machines. Additionally, the grinding tool machine 20 of the invention is implemented with the dust collection bag 41. Furthermore, this design provides greater mobility than conventional grinding tool machines paired with vacuum devices. It is no longer restricted by working range limitations of the vacuum device, and it has the advantage of being replaceable according to the user's needs.

[0035]Please refer to FIG. 5, FIG. 6, and FIG. 7. To improve dust collection efficiency, in one embodiment, the second airflow-generating component 29 includes an intake side 291 and an exhaust side 292. The intake side 291 is opposite to the exhaust side 292. The intake side 291 faces and extracts air of the interior of the tool body 21. The exhaust side 292 faces a direction of the dust collection connection pipe 252 opposite to the dust collection shield 251, and provides airflow toward a side of the dust collection tube 40 close to the dust collection bag 41. More specifically, the dust collection connection pipe 252 includes an extension line 253, and an angle between an axis 293 of the second airflow-generating component 29 and the extension line 253 is less than 90 degrees.

[0036]On the other hand, referring to FIG. 5, FIG. 6, and FIG. 7, the tool body 21 includes a head portion 211 with the motor 22, and a handle portion 212 connected to the head portion 211. The at least one air inlet 27 is located on the handle portion 212. Additionally, the tool body 21 includes a mounting base 30 located in the passage 28, where the mounting base 30 provides for the second airflow-generating component 29 to be disposed therein, allowing the second airflow 60 generated by the second airflow-generating component 29 to flow into the dust collection connection pipe 252. In the embodiment, the dust collection connecting pipe 252 is provided with an opening 254 that communicates with the passage 28. The opening 254 faces the second airflow-generating component 29 and receives the second airflow 60. Furthermore, to facilitate the installation of the second airflow-generating component 29, the dust collection connecting pipe 252 includes an installation bevel 255 at the opening 254.

[0037]In another embodiment, the grinding tool machine 20 includes an electronic control module 31 located inside the tool body 21 and electrically connected to the motor 22 to drive the motor 22 to operate. At least part of the electronic control module 31 is positioned on a path of the second airflow 60 between the at least one air inlet 27 and the passage 28. It can be seen that when the second airflow-generating component 29 is activated, the dust collection efficiency of the grinding tool machine 20 is improved, and the electronic control module 31 is dissipated at the same time.

[0038]Please refer to FIG. 5. The grinding tool machine 20 includes a partition 32 located at the interior of the tool body 21. The interior of the tool body 21 is divided by the partition 32 into a first installation space 214 provided with the motor 22, and a second installation space 215 connected to the at least one air inlet 27. The second installation space 215 allows the second airflow-generating component 29 extracts external air through the at least one air inlet 27 when activated. Furthermore, the interior of the tool body 21 is substantially isolated between the first installation space 214 and the second installation space 215 by the partition 32 connecting with the electronic control module 31. The first installation space 214 and the second installation space 215 are not communicated, ensuring that the second airflow-generating component 29 can only extract external air through the second installation space 215 and the at least one air inlet 27.

[0039]In one embodiment, referring to FIG. 5, FIG. 6, and FIG. 7, a part of the electronic control module 31 is located in the first installation space 214, while a remaining of the electronic control module 31 is in the second installation space 215. The grinding tool machine 20 includes at least one heat dissipation hole 33 located in the tool body 21 and communicated with the first installation space 214 but does not communicate with the passage 28. When the first airflow-generating component 23 is activated, the first airflow-generating component 23 extracts air from the first installation space 214 through the at least one heat dissipation hole 33, allowing the first airflow 50 to dissipate heat from the electronic control module 31. It should be noted that due to an arrangement of the partition 32, the at least one heat dissipation hole 33 does not communicate with the passage 28, and the second airflow-generating component 29 cannot extract external air through the at least one heat dissipation hole 33. Additionally, to enhance the heat dissipation of the electronic control module 31, in one embodiment, the grinding tool machine 20 is provided with at least one heat dissipation fin assembly 34 connected to the electronic control module 31. The at least one heat dissipation fin assembly 34 is positioned facing the at least one heat dissipation hole 33 and is located along a path of the first airflow 50. During operation, the at least one heat dissipation fin assembly 34 absorbs heat from the electronic control module 31 and dissipates heat through the first airflow 50, thereby facilitating the cooling of the electronic control module 31.

[0040]On the other hand, referring to FIG. 5, FIG. 6, and FIG. 7, in addition to providing dust collection functionality, the first airflow-generating component 23 also serves to provide heat dissipation. In one embodiment, the first airflow-generating component 23 includes a plurality of first blades 231 facing the grinding disc 24, and a plurality of second blades 232 facing the motor 22. In one embodiment, the grinding tool machine 20 further includes at least one ventilation hole 36 located at a side of the head portion 211 of the tool body 21 close to the grinding disc 24. The at least one ventilation hole 36 allows the first airflow 50 generated by the first airflow-generating component 23 to flow through thereof.