Using method of internal wind path structure of electric tool

Abstract

The invention relates to the technical field of electric tools, in particular to a use method of an internal wind path structure of an electric tool, which comprises the following steps: step 1, the device is fully charged before use, a worker holds the device and places the device on a product to be processed, and the product to be processed can be processed by starting the device; 2, when the device operates, a machining mechanism of the device can machine a product to be machined, and the device can generate heat in the machining process; according to the invention, the stator cooling air channel, the rotor cooling air channel, the first air inlet, the second air inlet, the air outlet and the rotor air inlet channel are arranged, so that the stator body and the rotor body are respectively provided with the independent stator cooling air channel and rotor cooling air channel, the stator body and the rotor body are cooled, and the tool is prevented from being overheated; and foreign matters or scrap iron are prevented from entering the rotor cooling air duct through the magnetic bar and the net side cover, the stator body and the rotor body are protected, and tool damage is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of electric tools, and in particular to a method for using an internal air duct structure of an electric tool. Background Art

[0002] Power tools generate heat during operation. If the heat cannot be dissipated in time, it is easy to cause the equipment to overheat, which will reduce the service life of the equipment. In severe cases, the equipment may even shut down directly. Therefore, power tools need to be equipped with an internal air duct structure for heat dissipation and exhaust.

[0003] The internal air duct structures of electric tools (especially brushless angle grinders) in the prior art can be roughly divided into two categories. In one type of electric tool, the stator and rotor share a heat dissipation and exhaust passage. The defect of this structure is that metal iron filings are easily adsorbed on the rotor surface by the rotor with strong magnetism after entering the heat dissipation and exhaust passage from the air inlet, and quickly fill the air gap between the stator and the rotor, causing the tool to be damaged and unusable. In another type of electric tool, the rotor is sealed and protected, and the heat dissipation and exhaust passage only cools the stator. The defect of this structure is that, although the problem of metal iron filings being adsorbed by the rotor is avoided, the rotor cannot be cooled, and the magnetic steel inside the rotor is kept at high temperature for a long time and gradually demagnetized, causing the tool to be damaged and unusable. Therefore, a method for using the internal air duct structure of an electric tool is proposed to address the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a method for using an internal air duct structure of an electric tool to solve the problem that the internal air duct structure of some existing electric tools cannot simultaneously prevent metal filings from being adsorbed by the rotor and cool the rotor, which easily leads to damage to the tool.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A method for using an internal air duct structure of an electric tool, comprising the following steps:

[0007] Step 1: Fully charge the device before use, and the staff holds the device and places it on the product to be processed, and then starts the device to process the product;

[0008] Step 2: When the device is running, the processing mechanism of the device can process the product to be processed, and the device will generate heat during the processing;

[0009] Step 3: When the device is running, air flow will be generated inside the device. The device is provided with two sets of independent heat dissipation and exhaust channels, through which different components of the device can be cooled respectively;

[0010] The above steps require the use of an internal air duct structure of an electric tool, including a casing, a stator body and a rotor body, the stator body is provided on the inner side of the casing, the rotor body is provided on the inner side of the stator body, a stator cooling air duct is provided between the casing and the stator body, a rotor cooling air duct is provided between the stator body and the rotor body, a first air inlet is provided on the front side and the left and right sides of the front half of the casing, a second air inlet is provided on the middle position of the left and right sides of the casing, an exhaust port is provided on the rear side and the lower side of the rear half and the right side of the rear half of the casing, a rotor air inlet channel is provided on the middle position of the left and right sides of the casing, a magnetic rod is fixedly connected to the inner side of the rotor air inlet channel, a mesh cover is fixedly connected to the inner side of the second air inlet, the front end of the rotor body is fixedly connected to the inner ring of the bearing, and the outer ring of the bearing is fixedly connected to An aluminum insert, wherein a sealing cover is fixedly connected to the front side of the aluminum insert, a circular thin-walled part is fixedly connected to the outer side of the aluminum insert, the outer side of the circular thin-walled part is fixedly connected to the casing, a stator end plate is fixedly connected to the front side of the stator body, a plurality of grooves are arranged at intervals along its circumference on the rear side of the circular thin-walled part, a plurality of bosses are arranged at intervals along its circumference on the front side of the stator end plate, and the bosses are all inserted into the grooves, a fan blade is arranged on the rear side of the bearing, the inner side of the fan blade is fixedly connected to the rotor body, a plurality of stator slots are arranged at intervals along its circumference on the inner ring of the stator body, and stator slot fibers are arranged on the inner sides of the stator slots, a power supply is arranged on the inner front half of the casing, a control board is fixedly connected to the inner front half of the casing, the upper side of the control board is fixedly connected to the power supply, and a key switch is fixedly connected to the upper front half of the casing.

[0011] Preferably, the outer wall of the stator body is provided with a connecting protrusion, the stator body is fixedly connected to the casing via the connecting protrusion, the rotor body and the stator body are rotatably connected, the stator cooling air duct is composed of the inner wall of the casing and the outer wall of the stator body, and the rotor cooling air duct is composed of the inner wall of the stator body, the outer wall of the rotor body, the stator slot and the stator slot fiber.

[0012] Preferably, the stator cooling air duct is connected to the first air inlet, the rotor cooling air duct is connected to the second air inlet through the rotor air inlet channel, the stator cooling air duct and the rotor cooling air duct are both connected to the exhaust port, and the rotor cooling air duct and the rotor air inlet channel are both connected to the interior of the circular thin-walled part.

[0013] Preferably, the sealing cover is composed of a silicone sleeve and a circular plate, the rear side of the sealing cover is fitted with the bearing, a connecting protrusion is provided on the outer side of the circular thin-walled part, and the circular thin-walled part is tightly fitted with the end of the stator end plate.

[0014] Preferably, the stator slot fibers are all rectangular plate structures, the power supply and the control board are both located on the front sides of the stator body and the rotor body, and the power supply and the key switch are electrically connected to the control board respectively.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In the present invention, by setting the stator cooling air duct, the rotor cooling air duct, the first air inlet, the second air inlet, the exhaust port and the rotor air inlet channel, the device respectively sets independent stator cooling air ducts and rotor cooling air ducts for the stator body and the rotor body, dissipates heat for the stator body and the rotor body to prevent the tool from overheating, and prevents foreign matter or iron filings from entering the rotor cooling air duct through the magnetic rod and the mesh edge cover, thereby protecting the stator body and the rotor body and preventing damage to the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a rear view of the overall structure of the present invention;

[0019] Figure 3 It is the first cross-sectional view of the overall structure of the present invention;

[0020] Figure 4 It is a second cross-sectional view of the overall structure of the present invention;

[0021] Figure 5 This is a schematic diagram of the stator structure of the present invention;

[0022] Figure 6 This is a schematic diagram of the rotor structure of the present invention;

[0023] Figure 7 This is a schematic diagram of the aluminum insert installation structure of the present invention;

[0024] Figure 8 This is a schematic diagram of the sealing cover installation structure of the present invention;

[0025] Fig. 9 For the present invention Figure 3 A schematic diagram of the structure at A;

[0026] Fig.10 For the present invention Figure 4 Schematic diagram of the structure at point B.

[0027] In the figure: 1, casing; 2, stator body; 3, rotor body; 4, stator cooling air duct; 5, rotor cooling air duct; 6, first air inlet; 7, second air inlet; 8, exhaust port; 9, rotor air inlet channel; 10, magnetic rod; 11, mesh cover; 12, bearing; 13, aluminum insert; 14, sealing cover; 15, circular thin-walled part; 16, stator end plate; 17, groove; 18, boss; 19, fan blade; 20, stator slot; 21, stator slot fiber; 22, power supply; 23, control panel; 24, key switch. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0030] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0031] See also Figure 1-10 , the present invention provides a technical solution:

[0032] A method for using an internal air duct structure of an electric tool, comprising the following steps:

[0033] Step 1: Fully charge the device before use, and the staff holds the device and places it on the product to be processed, and then starts the device to process the product;

[0034] Step 2: When the device is running, the processing mechanism of the device can process the product to be processed, and the device will generate heat during the processing;

[0035] Step 3: When the device is running, air flow will be generated inside the device. The device is provided with two sets of independent heat dissipation and exhaust channels, through which different components of the device can be cooled respectively;

[0036] The above steps require the use of an internal air duct structure of an electric tool, including a casing 1, a stator body 2 and a rotor body 3. The stator body 2 is provided on the inner side of the casing 1, and the rotor body 3 is provided on the inner side of the stator body 2. A stator cooling air duct 4 is provided between the casing 1 and the stator body 2, and a rotor cooling air duct 5 is provided between the stator body 2 and the rotor body 3. The front side and the left and right sides of the front half of the casing 1 are provided with a first air inlet 6, and the middle position of the left and right sides of the casing 1 is provided with a second air inlet 7. The rear side and the lower side of the rear half and the right side of the rear half of the casing 1 are provided with an exhaust port 8. The middle position of the left and right sides of the casing 1 is provided with a rotor air inlet channel 9, and the inner side of the rotor air inlet channel 9 is fixedly connected with a magnetic rod 10, and the inner side of the second air inlet 7 is fixedly connected with a mesh edge cover 11. The front end of the rotor body 3 is fixedly connected to the inner ring of the bearing 12, and the outer ring of the bearing 12 is fixedly connected with an aluminum insert 13. The aluminum insert A sealing cover 14 is fixedly connected to the front side of 13, a circular thin-walled part 15 is fixedly connected to the outer side of the aluminum insert 13, and the outer side of the circular thin-walled part 15 is fixedly connected to the casing 1. A stator end plate 16 is fixedly connected to the front side of the stator body 2, and a plurality of grooves 17 are arranged at intervals along its circumference on the rear side of the circular thin-walled part 15, and a plurality of bosses 18 are arranged at intervals along its circumference on the front side of the stator end plate 16, and the bosses 18 are all inserted into the grooves 17. A fan blade 19 is arranged on the rear side of the bearing 12, and the inner side of the fan blade 19 is fixedly connected to the rotor body 3. A plurality of stator slots 20 are arranged at intervals along its circumference on the inner ring of the stator body 2, and stator slot fibers 21 are arranged on the inner sides of the stator slots 20. A power supply 22 is provided on the inner front half of the casing 1, and a control board 23 is fixedly connected to the inner front half of the casing 1, and the upper side of the control board 23 is fixedly connected to the power supply 22. A key switch 24 is fixedly connected to the upper front half of the casing 1.

[0037] Furthermore, the outer wall of the stator body 2 is provided with a connecting protrusion, the stator body 2 is fixedly connected to the casing 1 through the connecting protrusion, the rotor body 3 and the stator body 2 are rotatably connected, the stator cooling air duct 4 is composed of the inner wall of the casing 1 and the outer wall of the stator body 2, and the rotor cooling air duct 5 is composed of the inner wall of the stator body 2, the outer wall of the rotor body 3, the stator slot 20 and the stator slot fiber 21. The rotor cooling air duct 5 can be formed between the stator body 2 and the rotor body 3 through the stator slot 20 and the stator slot fiber 21.

[0038] Furthermore, the stator cooling air duct 4 is connected to the first air inlet 6, the rotor cooling air duct 5 is connected to the second air inlet 7 through the rotor air inlet duct 9, the stator cooling air duct 4 and the rotor cooling air duct 5 are both connected to the exhaust port 8, the rotor cooling air duct 5 and the rotor air inlet duct 9 are both connected to the interior of the circular thin-walled part 15, and the stator body 2 and the rotor body 3 can be cooled respectively through the stator cooling air duct 4 and the rotor cooling air duct 5.

[0039] Furthermore, the sealing cover 14 is composed of a silicone sleeve and a circular plate, the rear side of the sealing cover 14 is fitted with the bearing 12, a connecting protrusion is provided on the outer side of the circular thin-walled part 15, and the ends of the circular thin-walled part 15 and the stator end plate 16 are tightly fitted, and the stator cooling duct 4 and the rotor cooling duct 5 can be separated by the circular thin-walled part 15 and the stator end plate 16.

[0040] Furthermore, the stator slot fibers 21 are all rectangular plate structures, the power supply 22 and the control board 23 are both located on the front side of the stator body 2 and the rotor body 3, the power supply 22 and the push button switch 24 are electrically connected to the control board 23 respectively, and the stator body 2, the power supply 22 and the control board 23 can be cooled at the same time through the stator cooling duct 4.

[0041] Workflow: Fully charge the power supply 22 before use. The staff can hold the housing 1 and place the device on the product to be processed. Manually press the button switch 24 to start the device through the control panel 23. When the device is running, the stator body 2 is fixed on the inner side of the housing 1, and the rotor body 3 rotates on the inner side of the stator body 2. The rotor body 3 can drive the processing mechanism of the device to process the product to be processed. The device will generate heat during the processing. When the rotor body 3 rotates, the inner ring of the bearing 12 and the fan blade 19 rotate synchronously with the rotor body 3, and the outer ring of the bearing 12 is fixed by the aluminum insert 13 and the circular thin-walled part 15. , the circular thin-walled member 15 is fixed to the housing 1, so the outer ring of the bearing 12 does not rotate, and the rotating fan blades 19 can prevent foreign matter from blocking the rotor cooling air duct 5; when the device is running, air flow will be generated inside the device, and an air flow enters the interior of the housing 1 from the first air inlet 6, first passes through the power supply 22 and the control board 23 located in front of the stator body 2 and the rotor body 3, and then passes through the stator cooling air duct 4 formed by the inner wall of the housing 1 and the outer wall of the stator body 2, and is discharged from the exhaust port 8, which can cool the stator body 2, the power supply 22, and the control board 23 at the same time; at the same time, another air flow enters from the second air inlet After entering the rotor air inlet channel 9 through the opening 7, it passes through the inside of the circular thin-walled part 15. Since the sealing cover 14 seals one side of the circular thin-walled part 15, and the circular thin-walled part 15 and the stator end plate 16 are tightly fitted through the groove 17 and the boss 18, the air flow passes through the rotor cooling air duct 5 composed of the inner wall of the stator body 2, the outer wall of the rotor body 3, the stator slot 20, and the stator slot fiber 21, and is discharged from the exhaust port 8. In this process, larger particles can be filtered through the mesh edge cover 11, and iron filings generated by product processing can be adsorbed by the magnetic rod 10 to prevent them from entering the circular thin-walled part 15 and the inside of the rotor cooling air duct 5. , which greatly improves the operating environment of the rotor body 3, can effectively prevent the strong magnetic rotor body 3 from absorbing iron filings and causing damage, greatly improves the life of the whole machine, and the magnetic rod 10 and the mesh edge cover 11 are connected in a detachable manner, which can be more convenient to clean the absorbed impurities; the device is respectively provided with independent stator cooling air ducts 4 and rotor cooling air ducts 5 for the stator body 2 and the rotor body 3, dissipates heat for the stator body 2 and the rotor body 3, prevents the tool from overheating, and prevents foreign matter or iron filings from entering the rotor cooling air duct 5 through the magnetic rod 10 and the mesh edge cover 11, protects the stator body 2 and the rotor body 3, and prevents tool damage.

[0042] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A method for using an internal air duct structure of an electric tool, characterized in that: The following steps are involved: Step 1: Fully charge the device before use, and the staff holds the device and places it on the product to be processed, and then starts the device to process the product; Step 2: When the device is running, the processing mechanism of the device can process the product to be processed, and the device will generate heat during the processing; Step 3: When the device is running, air flow will be generated inside the device. The device is provided with two sets of independent heat dissipation and exhaust channels, through which different components of the device can be cooled respectively; The above steps require the use of an internal air duct structure of an electric tool, comprising a housing (1), a stator body (2) and a rotor body (3), characterized in that: the stator body (2) is provided on the inner side of the housing (1), the rotor body (3) is provided on the inner side of the stator body (2), a stator cooling air duct (4) is provided between the housing (1) and the stator body (2), a rotor cooling air duct (5) is provided between the stator body (2) and the rotor body (3), a first air inlet (6) is provided on the front side and the left and right sides of the front half of the housing (1), and the housing (1) is provided with a first air inlet (6) A second air inlet (7) is provided at the middle position of both left and right sides, an air outlet (8) is provided at the rear side, the lower side of the rear half, and the right side of the rear half of the casing (1), a rotor air inlet channel (9) is provided at the middle position of both left and right sides of the casing (1), a magnetic bar (10) is fixedly connected to the inner side of each of the rotor air inlet channels (9), a mesh cover (11) is fixedly connected to the inner side of each of the second air inlet (7), a front end of the rotor body (3) is fixedly connected to the inner ring of a bearing (12), an outer ring of the bearing (12) is fixedly connected to an aluminum insert (13), and the aluminum insert The front side of the stator body (2) is fixedly connected to a sealing cover (14); the outer side of the aluminum insert (13) is fixedly connected to a circular thin-walled member (15); the outer side of the circular thin-walled member (15) is fixedly connected to the housing (1); the front side of the stator body (2) is fixedly connected to a stator end plate (16); the rear side of the circular thin-walled member (15) is provided with a plurality of grooves (17) at intervals along its circumference; the front side of the stator end plate (16) is provided with a plurality of bosses (18) at intervals along its circumference; the bosses (18) are all inserted into the grooves (17); the rear side of the bearing (12) is provided with a plurality of grooves (17) at intervals along its circumference; A fan blade (19) is provided, the inner side of the fan blade (19) is fixedly connected to the rotor body (3), the inner ring of the stator body (2) is provided with a plurality of stator slots (20) at intervals along its circumferential direction, the inner sides of the stator slots (20) are provided with stator slot fibers (21), the inner front half of the casing (1) is provided with a power supply (22), the inner front half of the casing (1) is fixedly connected to a control board (23), the upper side of the control board (23) is fixedly connected to the power supply (22), and the front upper half of the casing (1) is fixedly connected to a key switch (24).

2. The method for using the internal air duct structure of an electric tool according to claim 1, characterized in that: The outer wall of the stator body (2) is provided with a connecting protrusion, the stator body (2) is fixedly connected to the casing (1) via the connecting protrusion, the rotor body (3) is rotatably connected to the stator body (2), the stator cooling air duct (4) is composed of the inner wall of the casing (1) and the outer wall of the stator body (2), and the rotor cooling air duct (5) is composed of the inner wall of the stator body (2), the outer wall of the rotor body (3), the stator slot (20), and the stator slot fiber (21).

3. The method for using the internal air duct structure of a power tool according to claim 1, characterized in that: The stator cooling air duct (4) is connected to the first air inlet (6), the rotor cooling air duct (5) is connected to the second air inlet (7) through the rotor air inlet channel (9), the stator cooling air duct (4) and the rotor cooling air duct (5) are both connected to the exhaust port (8), and the rotor cooling air duct (5) and the rotor air inlet channel (9) are both connected to the interior of the circular thin-walled part (15).

4. The method for using the internal air duct structure of a power tool according to claim 1, characterized in that: The sealing cover (14) is composed of a silicone sleeve and a circular plate. The rear side of the sealing cover (14) is fitted with the bearing (12). A connecting protrusion is provided on the outer side of the circular thin-walled part (15). The circular thin-walled part (15) is tightly fitted with the end of the stator end plate (16).

5. The method for using the internal air duct structure of a power tool according to claim 1, characterized in that: The stator slot fibers (21) are all rectangular plate structures, the power supply (22) and the control board (23) are both located on the front sides of the stator body (2) and the rotor body (3), and the power supply (22) and the key switch (24) are electrically connected to the control board (23) respectively.

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