TWM455332U - Electric brushless motor grinder structure - Google Patents

Description

Electric brushless motor grinding machine structure

This creation is about a grinder structure, especially an electric brushless motor grinder structure that combines heat dissipation and structural strength.

A known structure of a grinder, such as the "heat-dissipation structure of the machine tool" approved by the Department of Economics on June 1, 101, as disclosed in the specification No. I365705, which is known from the contents of the specification. a tool shaft is disposed, the tool shaft is provided with a weight body having a first weight portion and a second weight portion, so that the tool shaft has an eccentric rotation stroke, and the machine tool is connected to the receiving space. The air inlet, wherein the weight body is provided with a heat dissipating body, and the heat dissipating body has a first blade portion and a second fan respectively corresponding to the first weight portion and the second weight portion a leaf portion, and a connecting portion connecting the first blade portion and the second blade portion, wherein the heat radiating body sucks gas from the air inlet in a rotating stroke of the tool shaft, and the gas is used by the first fan The leaf portion is conducted to the second blade portion and is discharged by the second blade portion.

Looking at the above-mentioned conventional structure is not difficult to find that there are still some shortcomings. The main reasons are as follows:

(1) The heat dissipating body is connected to the first blade portion and the second blade portion by a connecting portion to form a ring shape, and the first blade portion of the heat dissipating body is disposed at the first weight portion of the tool shaft, and The second blade portion is disposed at the second weight portion. Since the heat sink needs to have elasticity to be assembled smoothly, and the structural strength is increased, assembly is inconvenient, when the tool shaft rotates, The heat sink will be swayed and rotated, so that the joint portion is pulled by concentrated stress, and deformation or damage is likely to occur.

(2) when the tool shaft drives the heat sink to rotate, the gas is sucked from the air inlet, and the gas is conducted from the first blade portion to the second blade portion and is discharged by the second blade portion. The grinding machine motor cannot effectively dissipate heat, and the heat dissipating gas and the dust absorbing gas can flow mutually. It not only blocks the discharge of the heat-dissipating gas, but also introduces the dust into the grinding machine, which has the disadvantage of poor heat dissipation and easy damage.

In view of this, the creator has been engaged in the manufacturing development and design experience of related products for many years. After detailed design and careful evaluation, the author has finally achieved a practical and practical creation.

The technical problem to be solved by the present invention is to provide an electric brushless motor grinder structure in view of the above-mentioned shortcomings existing in the prior art.

A grinder body is formed with a handle portion for holding, a handle portion is formed at one end of the handle portion, and the receiving head portion is formed in a cylindrical shape with an externally threaded portion on the outer edge of the bottom end, and the grinder body is formed on the handle body. An operation panel and a pressure plate are disposed, and an end of the pressure plate extends to the receiving head, a ring is protruded from a bottom end of the brushless motor, and an inner thread segment is formed on an inner edge of the ring, and the ring is The outer edge is provided with a groove, and the brushless motor is installed in the accommodating head, and the internal thread section and the external thread section are screw-locked, and a plurality of through holes are opened between the brushless motor and the ring. The air passage between the brushless motor and the heat dissipating member is formed by the through hole, and one end of the diversion shell is retracted by a bundle ring, and the bundle ring is clamped at the groove of the brushless motor, and the diversion shell is at the other end The utility model is provided with a circular cover, and the flow guiding shell is provided with a plurality of heat dissipation openings between the bundle ring and the dome cover, and the flow guiding shell is connected with a connecting pipe on one side of the circular cover, and the connecting pipe is flat and provided with a nozzle. And the connecting pipe is connected with a dust collecting pipe at the pipe mouth, and the dust collecting area is improved through the flat connecting pipe A rotating member is formed with a shaft, and the shaft is connected to the brushless motor to form a rotary drive. The rotating member protrudes from the other end of the shaft with an eccentric block and an eccentric piece, and the eccentric piece is locked with a grinding. a turntable, and the grinding turntable is rotatable outside the circular cover of the flow guiding shell, a shaft hole is inserted through a center of the heat dissipating member, and a cover is eccentrically protruded around the shaft hole, and the heat dissipating member is formed at an outer end of the cover A plurality of heat dissipating blades are radially arranged on the disc, and the shaft hole of the heat dissipating member is pierced by the shaft of the rotating member, and the eccentric block is tightly fitted by the cover.

The first main purpose of the present invention is that the heat dissipating member protrudes from the shaft hole with a cover, and the rotating member passes through the shaft hole of the heat dissipating member, and the cover is tightly sleeved on the eccentric block of the rotating member. At the same time, the brushless motor is connected through the shaft of the rotating member, so that the quick assembly effect of the heat dissipating member can be formed, and the combined strength of the heat dissipating member and the rotating member can be combined to improve the practicability.

The second main purpose of the present invention is that the heat dissipating member has a disc formed on the outer end of the cover, and a plurality of heat dissipating blades are arranged on the disc, and the hot air of the brushless motor end is guided by the heat dissipating vane. The venting of the vents not only improves the heat dissipation effect, but also blocks the dust generated by the grinding wheel for grinding, thereby effectively improving the durability.

The third main purpose of the present invention is that the heat sink has a cover protruding from the shaft hole, and a disc and a heat dissipating blade are formed on the outer end of the cover, and the heat sink is tightly sleeved to the eccentric of the rotating member. Block, thereby increasing the structural strength of the heat sink, so that the heat sink is not easily damaged.

The fourth main purpose of the present invention is that the grinder body is provided with an externally threaded section on the receiving head, and the brushless motor is provided with an internal thread section at the ring, and the ring is opened between the ring and the brushless motor. The through hole is provided to provide the circulation of the dissipating air, and the internal thread section and the external thread section form a screw lock to fix the joint area between the brushless motor and the grinder body, so as to improve the bonding strength.

Other objects, advantages and novel features of the present invention will become more apparent from the detailed description and the accompanying drawings.

[this creation]

10‧‧‧ Grinder body

11‧‧‧ handle

12‧‧‧Quick joint

13‧‧‧Capable head

131‧‧‧External thread

14‧‧‧Operator panel

15‧‧‧Press

20‧‧‧Brushless motor

21‧‧‧ ring

211‧‧‧Threaded section

212‧‧‧ Groove

22‧‧‧through hole

30‧‧‧Guide

31‧‧‧Bundle

32‧‧‧round cover

33‧‧‧ vents

34‧‧‧Connecting tube

341‧‧‧ nozzle

35‧‧‧Dust collecting tube

40‧‧‧Rotating parts

41‧‧‧ shaft

42‧‧‧Eccentric block

43‧‧‧Eccentric tablets

44‧‧‧ grinding turntable

50‧‧‧ Heat sink

51‧‧‧Axis hole

52‧‧‧ Cover

53‧‧‧ disc

54‧‧‧heating blades

The first picture is a perspective view of the creation.

Figure 2 is an exploded view of the creation.

Figure 3 is a cross-sectional view of the creation.

In order to enable your review committee to have a better understanding and understanding of the purpose, characteristics and efficacy of this creation, please refer to the following [Simplified Description of the Drawings] for details: First, please see the views shown in Figures 1 and 2. The structure of the electric brushless motor grinder includes a grinder body 10, a brushless motor 20, a baffle 30, a rotating member 40 and a heat dissipating member 50. a handle 11 for gripping, a quick connector 12 is connected at one end for connecting external power, and a receiving head 13 is formed at the other end. The receiving head 13 has a cylindrical shape at the outer edge of the bottom end. An externally threaded section 131 is formed, and the grinder body 10 is provided with an operation panel 14 on the handle portion 11, thereby facilitating control and monitoring of the grinding speed. The grinder body 10 is pivotally connected with a pressure plate 15 at the handle portion 11, And the end of the pressure plate 15 extends To the accommodating head 13 , the user can hold the accommodating head 13 with one hand and perform a pressing action. A ring 21 is protruded from the bottom end of the brushless motor 20 , and the inner edge of the ring 21 is formed therein. a threaded section 211, and a groove 212 is disposed on the outer edge of the ring 21, and the brushless motor 20 is mounted in the receiving head 13 and is screwed and fixed by the internal thread section 211 and the externally threaded section 131. A plurality of through holes 22 are defined between the brushless motor 20 and the ring 21, and the through holes 22 form a flow of air between the brushless motor 20 and the heat sink 50, and a guide ring 30 has a bundle of rings 31 at one end thereof. And the bundle ring 31 is disposed at the groove 212 of the brushless motor 20, the guide shell 30 is provided with a round cover 32 at the other end, and the flow guide shell 30 is opened between the bundle ring 31 and the dome 32. There is a plurality of heat dissipation ports 33, and the flow guiding shell 30 communicates with a connecting pipe 34 on one side of the circular cover 32. The connecting pipe 34 is flatly provided with a nozzle 341, and the connecting pipe 34 is connected with a set at the nozzle 341. The dust pipe 35 increases the dust collecting area through the flat connecting pipe 34, so that the grinding dust can be sucked into the dust collecting pipe 35 in a large amount, and a rotating member 40 is formed with a shaft 41, and the shaft 41 is formed by the shaft 41. A rotating drive is formed by connecting the brushless motor 20, and an eccentric block 42 and an eccentric piece 43 are sequentially protruded from the other end of the shaft 41, and a grinding turntable 44 is locked at the eccentric piece 43, and the grinding is performed. The turntable 44 is rotatable outside the circular cover 32 of the flow guiding case 30. A heat dissipation member 50 has a shaft hole 51 extending through the center thereof, and a cover 52 is eccentrically protruded around the shaft hole 51, and the heat sink 50 is disposed on the cover 52. The outer end is formed with a disc 53. The disc 53 is radially arranged with a plurality of heat dissipating blades 54. The shaft hole 51 of the heat dissipating member 50 is pierced by the shaft 41 of the rotating member 40, and is tightly fitted by the cover 52. The eccentric block 42 causes the heat sink 50 to be rotated by the eccentric block 42 and discharges the heat energy of the brushless motor 20 through the heat dissipation fins 54 through the heat dissipation port 33, thereby achieving both assembly strength and heat dissipation effect.

The combination of the structures is as shown in the second and third figures. The heat dissipating member 50 is tightly fitted to the eccentric block 42 of the rotating member 40 with the eccentric cover 52, and the shaft 41 is passed through. The shaft hole 51 of the heat sink 50, thereby forming a quick connection between the heat sink 50 and the rotating member 40. When the rotating member 40 rotates, the heat sink 50 can be rotated by the eccentric block 42 and then the shaft of the rotating member 40. The rod 41 is disposed in the center of the brushless motor 20, so that the brushless motor 20 can further drive the rotating member 40, and then the brushless motor 20 is placed in the receiving head 13 of the grinder body 10, and with the grinder body 10 The electrical connection is formed, and the internal thread segment 211 of the ring 21 is screwed to the external thread segment 131 of the receiving head 13 , and the large-area screw lock of the ring 21 and the receiving head 13 improves the brushless motor. The assembly stability of the housing 30 is further fixed to the brushless motor 20 by the bundle ring 31. At the groove 212 of the ring 21, the circular cover 32 of the flow guiding shell 30 can cover the rotating member 40 and the heat dissipating member 50, and the diversion tube 30 is inserted into the dust collecting tube at the nozzle 341 of the connecting tube 34. 35. The grinding wheel 44 is locked at the eccentric piece 43 of the rotating member 40, that is, the combined structure is completed.

The actual use of the continuation, as shown in Figures 1, 2, and 3, the grinder body 10 can set the rotational speed of the brushless motor 20 at the operation panel 14, and the brushless motor 20 is driven by the pressure plate 15, The brushless motor 20 can drive the rotating member 40 to rotate, so that the grinding wheel 44 connected to the rotating member 40 can perform the grinding operation on the surface of the object. When the surface of the object is ground to generate grinding dust, the dust powder is subjected to dust collection. The suction effect of the end of the tube 35 is caused by the flow guiding shell 30 flowing through the connecting tube 34 and sucking into the end of the dust collecting tube 35, thereby achieving the use state of the dust-free grinding. On the other hand, the rotating member 40 is driven by the eccentric block 42 to dissipate heat. The member 50 is rotated, and the heat dissipating fins 54 of the heat dissipating member 50 are exhausted toward the heat dissipating port 33, thereby sucking the low temperature air of the grinder body 10 at the shank portion 11 and flowing around the brushless motor 20 while carrying away the same. The heat energy is used to achieve the effect of stabilizing the heat dissipation. What is more remarkable is that the disk 53 of the heat sink 50 has a barrier effect, which not only improves the exhaust volume of the heat sink blade 54, but also blocks the dust powder and prevents the dust powder from being dusted. Will flow into the receiving head 13 to raise it Durability.

With the structure of the above embodiment, the following benefits can be obtained: (1) the heat sink 50 protrudes from the shaft hole 51 with a cover 52, and the rotating member 40 passes through the shaft of the heat sink 50 with the shaft 41. The hole 51 is tightly sleeved on the eccentric block 42 of the rotating member 40 by the cover 52, and is connected to the brushless motor 20 through the shaft 41 of the rotating member 40, so that the quick assembly effect of the heat sink 50 can be formed, and The heat sink 50 has a combination of the heat sink 50 and the rotating member 40 to improve the utility. (2) The heat sink 50 has a disk 53 formed on the outer end of the cover 52, and a plurality of heat radiating on the disk 53. The blade 54 and the hot air at the end of the brushless motor 20 are discharged by the heat dissipating blade 54 from the heat dissipating port 33 of the diversion casing 30, thereby not only improving the heat dissipating effect, but also blocking the dust powder generated by the grinding disc 44 for grinding. The heat sink 50 is protruded from the shaft hole 51 to form a cover 52, and the outer end of the cover 52 is formed with a disk 53 and a heat dissipation blade 54. The heat sink 50 is a cover 52. The eccentric block 42 of the rotating member 40 is tightly sleeved, thereby improving the structural strength of the heat dissipating member 50, so that the heat dissipating member 50 is not easily damaged. (4) The grinder body 10 is provided with an externally threaded section 131 on the receiving head 13 , and the brushless motor 20 is provided with an internal thread section 211 at the ring 21 , and the ring 21 and the brushless motor 20 are provided. Through holes 22 are provided to provide ventilation of the heat dissipating air, by means of the internal thread segments 211 and The threaded section 131 is formed by screwing, which can increase the joint area between the brushless motor 20 and the grinder body 10, thereby improving the bonding strength.

In summary, this creation has indeed achieved a breakthrough structural design, and has improved new content, while at the same time achieving industrial use and progress, and this creation is not seen in any publication, but also novel, when In accordance with the provisions of the relevant laws and regulations of the Patent Law, a new type of patent application is filed according to law, and the examination authority of the bureau is required to grant legal patent rights.

Only the above-mentioned ones are only preferred embodiments of the present invention, and the scope of the creation of the present invention cannot be limited thereto; that is, the equal changes and modifications made by the majority of the patent application scope of the present invention should still belong to the present invention. Within the scope of the patent.

10‧‧‧ Grinder body

11‧‧‧ handle

12‧‧‧Quick joint

13‧‧‧Capable head

131‧‧‧External thread

14‧‧‧Operator panel

15‧‧‧Press

20‧‧‧Brushless motor

21‧‧‧ ring

211‧‧‧Threaded section

212‧‧‧ Groove

22‧‧‧through hole

30‧‧‧Guide

31‧‧‧Bundle

32‧‧‧round cover

33‧‧‧ vents

34‧‧‧Connecting tube

341‧‧‧ nozzle

35‧‧‧Dust collecting tube

40‧‧‧Rotating parts

41‧‧‧ shaft

42‧‧‧Eccentric block

43‧‧‧Eccentric tablets

44‧‧‧ grinding turntable

50‧‧‧ Heat sink

51‧‧‧Axis hole

52‧‧‧ Cover

53‧‧‧ disc

54‧‧‧heating blades

Claims (5)

An electric brushless motor grinder structure includes: a grinder body formed with a handle portion for holding, a handle portion formed at one end of the handle portion, and the receiving head portion is formed in a cylindrical shape An outer threaded portion is formed on the outer edge of the bottom end; a brushless motor has a ring protruding from the bottom end thereof, an inner threaded portion is formed on the inner edge of the ring, and a groove is formed on the outer edge of the ring, and The brushless motor is installed in the accommodating head, and is screwed and fixed by the internal thread section and the external thread section; a flow guiding shell has a bundle of loops at one end thereof, and is clamped by the bundle ring to the concave of the brushless motor At the slot, the deflector is provided with a round cover at the other end, and the deflector is provided with a plurality of heat dissipation openings between the bundle ring and the dome; a rotating member is formed with a shaft and is connected by the shaft The rotary motor is formed by a brushless motor, and the rotating member is sequentially provided with an eccentric block and an eccentric piece at the other end of the shaft, and the grinding wheel is locked with a grinding wheel at the eccentric piece, and the grinding wheel can be rotated by the guiding shell Outside the dome; and a heat sink having a shaft hole penetrating the center thereof and being eccentric around the shaft hole a cover is disposed, and the heat dissipating member is formed with a disc at an outer end of the cover, and a plurality of heat dissipating blades are radially arranged on the disc, and the shaft hole of the heat dissipating member is pierced by the shaft of the rotating member. The eccentric block is tightly fitted by the cover, so that the heat sink is rotated by the eccentric block, and the heat energy of the brushless motor is discharged through the heat dissipation port through the heat dissipation blade, thereby combining the assembly strength and the heat dissipation effect. The structure of the electric brushless motor grinder according to the first aspect of the invention, wherein the baffle is connected to a side of the dome with a connecting pipe, and the connecting pipe is flat and provided with a nozzle, and the connecting pipe is A dust collecting pipe is connected to the nozzle to allow the grinding dust to be sucked into the dust collecting pipe in a large amount. The electric brushless motor grinder structure according to claim 1, wherein the grinder body is provided with an operation panel on the handle portion, thereby facilitating control and monitoring of the grinding speed. The electric brushless motor grinder structure according to claim 1, wherein the grinder body is pivotally connected with a pressure plate at the handle, and the end of the pressure plate extends to accommodate the head, so that the user can Hold the receiving head and perform a pressing action. The electric brushless motor grinder structure according to claim 1, wherein the brushless motor and the ring are provided with a plurality of through holes, and the through holes form air circulation between the brushless motor and the heat sink. .