CN115870855A - Angle grinder - Google Patents
Angle grinder Download PDFInfo
- Publication number
- CN115870855A CN115870855A CN202111126384.8A CN202111126384A CN115870855A CN 115870855 A CN115870855 A CN 115870855A CN 202111126384 A CN202111126384 A CN 202111126384A CN 115870855 A CN115870855 A CN 115870855A
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- angle grinder
- equal
- motor
- stator
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 9
- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 10
- 238000004804 winding Methods 0.000 description 9
- 239000010431 corundum Substances 0.000 description 8
- 229910052593 corundum Inorganic materials 0.000 description 8
- 239000000428 dust Substances 0.000 description 6
- 239000006061 abrasive grain Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 239000002320 enamel (paints) Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
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- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The embodiment of the application discloses an angle grinder belongs to electric tool technical field. The angle grinder comprises: an output shaft for mounting a disk; the motor is used for driving the disk to rotate; the motor includes: a stator, a rotor and a drive shaft; the rotor is at least partially arranged in the stator in a penetrating way, and the driving shaft is arranged in the rotor in a penetrating way; a housing in which the motor is accommodated; the outer diameter of the stator is more than or equal to 38mm and less than or equal to 43mm, and the stacking length of the stator is more than or equal to 25mm and less than or equal to 40mm; the shell is provided with a holding part, the holding part at least contains the motor, the periphery of the holding part is used for holding, the peripheral perimeter of the holding part is larger than or equal to 140mm and smaller than or equal to 170mm, and the rotating speed of the output shaft is larger than or equal to 8000rpm and smaller than or equal to 10000rpm. The embodiment of the application improves the comfort level of holding of a user.
Description
Technical Field
The embodiment of the application relates to the technical field of electric tools, in particular to an angle grinder.
Background
An angle grinder is an electric tool, which is mainly used for cutting, grinding and brushing metal and stone materials.
In the related art, the motor of the angle grinder is usually disposed in the handle housing, which makes the handle housing thicker, makes the user harder to hold, and is unstable in operation.
Disclosure of Invention
The embodiment of the application provides an angle grinder, and improves the comfort level of holding of a user. The technical scheme is as follows:
in one aspect, an embodiment of the present application provides an angle grinder, which includes:
an output shaft for mounting a disk;
the motor is used for driving the disk to rotate;
the motor includes: a stator, a rotor and a drive shaft; the rotor is at least partially arranged in the stator in a penetrating way, and the driving shaft is arranged in the rotor in a penetrating way;
a housing in which the motor is housed;
the outer diameter of the stator is more than or equal to 38mm and less than or equal to 43mm, and the stacking length of the stator is more than or equal to 25mm and less than or equal to 40mm; the shell is provided with a holding part, the holding part at least contains the motor, the periphery of the holding part is used for holding, the peripheral circumference of the holding part is larger than or equal to 140mm and smaller than or equal to 170mm, and the rotating speed of the output shaft is larger than or equal to 8000rpm and smaller than or equal to 10000rpm.
The technical scheme provided by the embodiment of the application can bring the following beneficial effects:
through using the stator that external diameter is more than or equal to 38mm and less than or equal to 43mm and the overlap length is more than or equal to 25mm and less than or equal to 40mm in the angle grinder, the size of motor is less, even if the motor sets up in the portion of gripping, also can make the comfortable gripping angle grinder of user, has improved the comfort level that the user gripped.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a front view of an angle grinder provided by an embodiment of the present application;
FIG. 2 is a top view of an angle grinder provided by embodiments of the present application;
FIG. 3 is a cross-sectional view of an angle grinder provided by an embodiment of the present application;
fig. 4 is a schematic view of a motor provided in an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Referring collectively to fig. 1-3, there is shown a schematic view of an angle grinder provided by embodiments of the present application. Fig. 1 is a front view of an angle grinder provided in an embodiment of the present application, fig. 2 is a top view of the angle grinder provided in an embodiment of the present application, and fig. 3 is a cross-sectional view of the angle grinder provided in an embodiment of the present application. The angle grinder 100 includes: output shaft 110, motor 120, casing 130.
The angle grinder 100 may be called an angle grinder, and is a hand-held power tool that grinds or cuts a material such as metal or stone using a disk rotating at a high speed.
The output shaft 110 is used for mounting a disk (not shown).
The output shaft 110 may also be used for power take off, and the output shaft 110 may output power to the disks. The disc is an accessory of the angle grinder 100, the angle grinder 100 has various working conditions, the angle grinder 100 is provided with various discs, and the most common angle grinder discs comprise a grinding disc and a slicing disc. The basic material of the abrasive sheet is composed of abrasive grains, a binder and glass fibers. The abrasive particles comprise two different materials of brown corundum and white corundum, the brown corundum is a main body of the abrasive disc, and the white corundum is used as an additive to increase the sharpness of the abrasive disc. The slices can be classified into resin slices and diamond slices according to the material. The resin slice material consists of abrasive grains, adhesive and glass fiber reinforced net. The abrasive grains comprise three materials of brown corundum, white corundum and silicon carbide. The abrasive particles for cutting the slices of metal are mainly brown corundum, and white corundum is an additive to increase the sharpness of the slices. The abrasive particles used for cutting the slices of stone material are silicon carbide. Illustratively, the diameter of the disk is 100mm (millimeters) or more and 125mm or less.
The motor 120 is accommodated in the housing 130.
Illustratively, the housing 130 includes a head housing and a handle housing, the head housing being connected to one end of the handle housing. The handle housing forms a grip portion for gripping, the motor 120 is at least partially accommodated in the handle housing, the head housing is used for mounting the output shaft 110, and the output shaft 110 at least partially protrudes from the head housing. A cooling air duct communicated with the external environment is formed between the inner wall of the handle housing and the motor 120, and air in the external environment flows through the cooling air duct to dissipate heat of the motor 120. The motor 120 may also be used to drive a fan to rotate, and the fan rotates to suck air in the external environment into the cooling air duct for heat dissipation. The housing 130 forms an accommodating space around the housing, and can accommodate a fan, a motor, other components, and the like.
In a possible implementation manner, the head shell is further provided with a protective cover, when the disk is connected to the output shaft 110, the protective cover at least partially surrounds the disk, so that debris can be effectively prevented from splashing to a user, the disk can be prevented from being accidentally damaged and splashing to the user to cause injury to the user, and the safety of the user is ensured during the operation of the angle grinder.
The motor 120 is used to drive the disk to rotate. As shown in fig. 4, the motor 120 includes: stator 121, rotor 122, and drive shaft 123. A rotor 122 is at least partially inserted into the stator 121, and a driving shaft 123 is inserted into the rotor 122.
The motor 120 acts as a power source for the angle grinder and directly determines the performance of the angle grinder 100. In the embodiment of the present application, the outer diameter of the stator 121 is 38mm or more and 43mm or less, and the lamination length of the stator 121 is 25mm or more and 40mm or less.
The outer diameter of the stator 121 may be understood as the outer diameter of the stator core, and the lamination length of the stator 121 may be understood as the thickness of the stator core.
The stator 121 may provide an electromagnetic field for the rotor. The stator 121 is generally fixed to the housing without any movement. The rotor 122 cooperates with the stator 121 to generate kinetic energy driven by an electromagnetic field. As a power source for angle grinder 100, rotor 122 rotates at high speed during operation. The stator 121 includes a stator main body having a substantially hollow cylindrical shape and a plurality of winding teeth circumferentially provided on an inner wall of the stator main body, and a winding groove is formed between adjacent winding teeth. The plurality of winding teeth are preferably evenly distributed in the circumferential direction. The number of the winding teeth is not limited, and the winding teeth comprise groove walls arranged along the radial direction of the main body and baffle plates connected with the inner ends of the groove walls, namely, the winding teeth are approximately T-shaped. The two ends of the baffle plate in the axial direction extend out of the two ends of the groove wall in the axial direction. The rotor 122 is at least partially inserted into the stator 121, and the driving shaft 123 is inserted into the rotor 122 and can rotate together with the rotor 122. Both ends of the driving shaft 123 are rotatably supported on the housing of the motor 120. Illustratively, both ends of the driving shaft 123 are rotatably supported on the housing of the motor 120 through bearings, and the driving shaft 123 provides a rotational support for the rotor 122 and serves to output power to the outside. It should be noted that the housing of the angle grinder 100 may be used as the housing of the motor 120, or the housing of the motor 120 may be separately provided. A fan may be provided on the front end of the driving shaft 123 (the front end refers to an end of the driving shaft 123 close to the output shaft 110), and the fan may be rotatable with the driving shaft 123. The material of the fan blade of the fan may be, but is not limited to, a metal material, such as copper or aluminum, which has good thermal conductivity, and the heat dissipation efficiency of the motor may be improved by transferring the heat on the driving shaft to the fan blade made of the metal material.
Because the angle grinder 100 can generate a large amount of dust during operation, and after long-term use, the dust in the air flow can enter the motor 120 and gradually break the enamel coating of the coil in the motor 120, causing the failure of the motor 120, therefore, the embodiment of the present application can provide the sealing assemblies at the two ends of the motor 120, and the sealing assemblies are used for sealing the air gap between the stator 121 and the rotor 122, so as to prevent the dust from entering the inside of the motor 120, and further prevent the dust from entering the winding slot on the stator 121 from the air gap between the stator 121 and the rotor 122, so as to protect the enamel coating of the coil, and prolong the service life of the motor 120. Illustratively, the seal assembly further includes a dust cap disposed on the front end of the drive shaft and covering an air gap between the front end of the stator and the front end of the rotor. Illustratively, the dust cap is preferably, but not limited to, disposed on the drive shaft.
The motor 120 includes a drive shaft 123 rotatable about a first axis and the output shaft 110 is rotatable about a second axis. Illustratively, the first axis is the length direction of the drive shaft 123 and the second axis is the length direction of the output shaft 110, the first axis and the second axis being substantially perpendicular.
Illustratively, the motor 120 in the embodiment of the present application is a brushless motor, in particular, an inner rotor brushless motor.
In the exemplary embodiment, the outer diameter of stator 121 is 40mm, and the stack length of stator 121 is 30mm. In this case, the outer diameter of the rotor 122 is 21mm, and the stator yoke width of the stator 121 is 2.3mm.
In the exemplary embodiment, motor 120 has a power to volume ratio of 18.5W/cm or greater 3 And is less than or equal to 26W/cm 3 . The power-to-volume ratio of the motor 120 is a ratio of the power to the volume of the motor, and reflects the power output efficiency of the motor, and the larger the ratio is, the larger the power of the motor is, in the same volume. The angle grinder 100 in the embodiment of the present application includes a motor with high power density.
In the exemplary embodiment, the bare machine idle speed of motor 120 is at least 34000rpm and less than 40000rpm.
Because the motor 120 included in the angle grinder 100 in the embodiment of the present application is small in size, the cost of the angle grinder 100 is reduced, and the market competitiveness is improved.
The housing 130 is provided with a holding portion, the holding portion at least contains the motor, the periphery of the holding portion is used for holding, and the peripheral perimeter of the holding portion is greater than or equal to 140mm and less than or equal to 170mm.
The handle housing is provided with a grip portion, and at least a part or the whole of the handle housing may be used as the grip portion.
The holding part is used for being held by a user, and at least one hand of an operator can be placed on the holding part so as to guide the angle grinder. The grip portion may extend along a first line (e.g., a line along which a rotational axis of the motor is located), the grip portion may include a front end and a rear end in the rotational axis direction of the motor, the motor 120 may be disposed at the front end of the grip portion, and the rear end of the grip portion may provide a coupling portion for coupling with the energy source. Illustratively, the energy source is a battery pack, the combining portion is used for detachably combining the battery pack, the battery pack is used for supplying power to the motor, and the battery pack may be a 12V battery pack, an 18V battery pack, a 24V battery pack, or another battery pack with other voltages, which is not limited in this embodiment of the present application; alternatively, the energy source may be alternating current, and the joint may be used to connect an alternating current cable, and the embodiment of the present application does not limit the kind of the energy source.
In a possible implementation, the peripheral perimeter of the grip portion is greater than or equal to 151mm and less than or equal to 165mm.
Illustratively, the peripheral circumference of the grip portion may be determined by winding a string around the grip portion, measuring the length of the string; alternatively, the grip portion may be equivalent to a cylinder, and the peripheral circumference of the grip portion is determined by determining the height and radius of the cylinder.
In the illustrative embodiment, the peripheral perimeter of the grip portion is 157mm. At this time, as shown in fig. 2, the width L1 of the grip portion is about 46.3mm, as shown in fig. 1, the height L2 of the grip portion is about 52.8mm, and the average radius of the grip portion (the average radius obtained by making the grip portion equivalent to a cylindrical body) is about 25mm, so that the user can comfortably hold the angle grinder.
In the embodiment of the present application, the rotation speed of the output shaft of the angle grinder 100 is 8000rpm or more and 10000rpm or less.
Illustratively, the output power of the angle grinder 100 is 640W (watts) or more and 1200W or less.
Illustratively, the power of the maximum efficiency point of the angle grinder 100 is equal to or greater than 700W and equal to or less than 1000W.
Exemplarily, the torque of the angle grinder 100 is 1N · m or more and 2N · m or less; the current of the angle grinder 100 is more than or equal to 40A and less than or equal to 60A; the output power of the angle grinder 100 is 600W or more and 1100W or less.
In the exemplary embodiment, angle grinder 100 also includes face gears that are used to connect the motor to the output shaft.
The output shaft 110 may also be used for face gear fixation. Face gears may be used to reduce speed and increase torque. The face gear is disposed between the driving shaft 123 and the output shaft 110, so that the face gear can transmit power between the motor 120 and the output shaft 110, and the face gear can reduce the rotating speed output by the driving shaft 123 to be transmitted to the output shaft 110, so that the output shaft 110 can obtain a higher output torque, thereby improving the loading capacity of the angle grinder 100.
Illustratively, the face gear may be selected from powder metallurgy materials to achieve reduced cost.
In the exemplary embodiment, the face gear ratio is 4.333. According to the embodiment of the application, the bevel gear is replaced by the face gear, so that a large output speed ratio is realized, and the cost and the weight are greatly reduced.
In the illustrated embodiment, a switch 131 is further disposed on the housing 130, and the switch 131 may be used to control the start and stop of the angle grinder or the switch 131 may be used to control the start and stop of the angle grinder and the rotation speed of the angle grinder. The switch type of the angle grinder 100 may include any one of the following: point-action type, swing rod type, trigger type, paddle type.
To sum up, among the technical scheme that this application embodiment provided, through use external diameter more than or equal to 38mm and less than or equal to 43mm and the stator that the stack length is more than or equal to 25mm and less than or equal to 40mm in the angle grinder, the size of motor is less, even if the motor sets up in the portion of gripping, also can make the comfortable gripping angle grinder of user, has improved the comfort level that the user gripped.
In addition, the angle grinder provided by the embodiment of the application reduces the circumference of the holding part without reducing the angle grinder performance.
The above parameters are theoretical parameters, and manufacturing tolerances occurring in the manufacturing process are not considered.
The above description is only exemplary of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like that are made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (11)
1. An angle grinder, the angle grinder comprising:
an output shaft for mounting a disk;
the motor is used for driving the disk to rotate;
the motor includes: a stator, a rotor and a drive shaft; the rotor is at least partially arranged in the stator in a penetrating way, and the driving shaft is arranged in the rotor in a penetrating way;
a housing in which the motor is housed;
it is characterized in that the preparation method is characterized in that,
the outer diameter of the stator is more than or equal to 38mm and less than or equal to 43mm, and the stacking length of the stator is more than or equal to 25mm and less than or equal to 40mm; the shell is provided with a holding part at least containing the motor, the periphery of the holding part is used for holding, the peripheral perimeter of the holding part is larger than or equal to 140mm and smaller than or equal to 170mm, and the rotating speed of the output shaft is larger than or equal to 8000rpm and smaller than or equal to 10000rpm.
2. The angle grinder of claim 1, wherein the grip portion has a peripheral circumference of 157mm.
3. The angle grinder of claim 2, wherein the width of the grip portion is 46.3mm and the height of the grip portion is 52.8mm.
4. The angle grinder of claim 1, further comprising a face gear for connecting the motor and the output shaft.
5. The angle grinder of claim 4, wherein the face gear has a gear ratio of 4.333.
6. The angle grinder of claim 1, wherein the stator has an outer diameter of 40mm and a stack length of 30mm.
7. The angle grinder of claim 6, wherein the rotor has an outer diameter of 21mm and the stator has a stator yoke width of 2.3mm.
8. The angle grinder of claim 1, wherein the power-to-volume ratio of the motor is 18.5W/cm or greater 3 And is less than or equal to 26W/cm 3 。
9. The angle grinder of claim 1, wherein the bare engine idle speed of the motor is 34000rpm or more and 40000rpm or less.
10. The angle grinder of claim 1, wherein the angle grinder has an output power of 640W or more and 1200W or less.
11. The angle grinder of any one of claims 1 to 10, wherein the disk has a diameter of 100mm or more and 125mm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111126384.8A CN115870855A (en) | 2021-09-26 | 2021-09-26 | Angle grinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111126384.8A CN115870855A (en) | 2021-09-26 | 2021-09-26 | Angle grinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115870855A true CN115870855A (en) | 2023-03-31 |
Family
ID=85762425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111126384.8A Pending CN115870855A (en) | 2021-09-26 | 2021-09-26 | Angle grinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115870855A (en) |
-
2021
- 2021-09-26 CN CN202111126384.8A patent/CN115870855A/en active Pending
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