CN217642978U - Motor mounting structure and electric tool - Google Patents

Abstract

The utility model provides a problem how to make the pivot of motor can not wear and tear the outer casing in the use. In order to solve the above problem, the utility model provides a motor mounting structure and electric tool, include: the outer shell is provided with an accommodating space and an output port communicated with the accommodating space; the motor is arranged in the accommodating space and is provided with an output shaft which is matched and connected with the output port; the end cover is connected with the motor and the outer shell; the output shaft is provided with a first end portion which is located in the accommodating space and is far away from the output port, and a first matching distance is formed between the end face of the first end portion and the corresponding inner wall of the outer shell.

Description

Motor mounting structure and electric tool

Technical Field

The utility model relates to an electric tool technical field particularly, relates to a motor mounting structure and electric tool.

Background

With the development of electric tools, particularly angle grinders such as electric tools, a motor is arranged inside the angle grinder to drive grinding discs to rotate, and the grinding discs are directly output by the motor without reducing speed through a gear box. An ordinary angle grinder is directly connected with an outer casing of the angle grinder through a motor, at the moment, a protruding rotating shaft on the motor can directly touch the inner wall of the outer casing, so that the rotating shaft rotates in the using process to abrade the inner wall of the outer casing, at the moment, in order to cope with abrasion of the outer casing, an aluminum casing is generally adopted for the angle grinder, but the aluminum casing is high in cost and complex in machining process.

Therefore, how to enable the rotating shaft of the motor not to wear the outer shell in the using process becomes a problem which needs to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem how to make the pivot of motor can not wear and tear the outer casing in the use.

In order to solve the above problem, the utility model provides a motor mounting structure, include: the outer shell is provided with an accommodating space and an output port communicated with the accommodating space; the motor is arranged in the accommodating space and is provided with an output shaft which is matched and connected with the output port; the end cover is connected with the motor and the outer shell; the output shaft is provided with a first end portion which is located in the accommodating space and is far away from the output port, and a first matching distance is formed between the end face of the first end portion and the corresponding inner wall of the outer shell.

Compared with the prior art, the effect that this scheme can reach: the motor is not directly connected with the outer shell, but is connected with the end cover and the outer shell through the end cover, so that the motor is fixed. Meanwhile, the first end part of the output shaft penetrates through the inner area of the motor and is arranged at the top of the motor in a protruding mode. The top surface of the first end part is the end surface of the first end part, and the end surface of the first end part has a first matching distance from the inner wall of the outer shell, and the first matching distance has a fixed value and is larger than zero. Thereby make the output shaft set up inside the outer casing, but carry out rotatory during operation at the output shaft, the output shaft can not touch with the outer casing to guarantee that the output shaft can not wear and tear the inner wall of outer casing.

In an embodiment of the present invention, the motor includes: the motor cover is positioned on one side of the first end part; the first bulge is connected with the motor cover, the first bulge protrudes towards the accommodating space, and a first end part is embedded in the first bulge; the first boss portion includes: and a second end face, wherein a second matching distance is formed between the second end face and the corresponding inner wall of the outer shell.

Compared with the prior art, the effect that this scheme can reach: wherein, be provided with second cooperation distance, then can make the motor lid equally can not touch with the inner wall of outer casing to guarantee that the vibrations that the output shaft produced at rotatory in-process can not transmit for outer casing through the motor lid when transmitting for the motor lid, thereby reduce the influence of output shaft to outer casing.

In an embodiment of the present invention, the first fitting distance is equal to the second fitting distance.

Compared with the prior art, the effect that this scheme can reach: first cooperation distance equals with the second cooperation distance, then can guarantee first bellying and have under the condition of enough support to first end for first bellying influences the rotation at the output shaft at first end place minimum.

In an embodiment of the present invention, the outer casing further includes: the air duct is communicated with the accommodating space and the outside of the opposite accommodating space.

Compared with the prior art, the effect that this scheme can reach: the air duct arranged on the outer casing is communicated with the outer area of the outer casing and the accommodating space in the outer casing, so that the motor has certain air circulation in the use process, the use temperature of the motor is reduced, and a good heat dissipation effect is achieved.

In an embodiment of the present invention, the air duct includes: the first air opening is arranged at the handheld part of the outer shell; the second air inlet is arranged at the position, used for coating the motor, of the outer shell; wherein the cooling air circulates between the first tuyere and the second tuyere.

Compared with the prior art, the effect that this scheme can reach: in a specific embodiment, the air duct specifically includes a first air opening, the first air opening is disposed on the outer casing and close to a portion held by a user, the second air opening is disposed at one end of the outer casing located in the accommodating space, and a certain distance is provided between the first air opening and the second air opening, so that it is ensured that the first air opening and the second air opening form a complete air duct, and the heat of the motor can be further dissipated.

In an embodiment of the invention, the first tuyere is provided with a grid structure.

Compared with the prior art, the effect that this scheme can reach: the grid structure can guarantee that the first wind gap can strengthen the structural strength of the first wind gap under the condition that the first wind gap has enough air output.

In one embodiment of the present invention, the air ducts are disposed on opposite sides of the housing case.

Compared with the prior art, the effect that this scheme can reach: the air duct arranged oppositely can further enhance the heat dissipation effect brought by the air duct.

In one embodiment of the present invention, the periphery of the outer wall of the end cap is provided with a second convex portion; a positioning boss is arranged on one side of the outer shell positioned in the accommodating space; wherein the second boss is suspended to the positioning boss.

Compared with the prior art, the effect that this scheme can reach: the motor passes through the end cover to be connected with the outer casing, can reduce the vibrations that the motor directly links the outer casing and bring, and the end cover hangs to the location boss through the bellying and cooperates comparatively conveniently.

In an embodiment of the present invention, the electric power tool has the motor mounting structure of any one of the above embodiments.

Compared with the prior art, the effect that this scheme can reach: the electric tool in this embodiment has the handle mounting structure in any one of the embodiments, and therefore the electric tool in this embodiment has the beneficial effects of any one of the embodiments, and details are not repeated here.

In one embodiment of the present invention, the electric tool is embodied as an angle grinder.

Compared with the prior art, the effect that this scheme can reach: the angle grinder in this embodiment has the handle mounting structure in any one of the above embodiments, so that the electric tool in this embodiment has the beneficial effects in any one of the above embodiments, and is not described herein again.

Drawings

FIG. 1 is a schematic view of a motor mounting structure;

FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 3 at B;

FIG. 5 is a schematic view of the assembly of the end cap with the motor casing;

FIG. 6 is a schematic view of the structure of an angle grinder.

Description of the reference numerals:

1. a motor mounting structure; 10. an outer housing; 110. an air duct; 111. a first tuyere; 1110. a grid structure; 112. a second tuyere; 120. positioning the boss; 130. an accommodating space; 20. a motor; 200. an output shaft; x1, a first matching distance; x2, a second matching distance; 210. a first end portion; 220. a first boss portion; 221. a second end face; 230. a motor cover; 30. an end cap; 310. a second boss portion; 40. an electric tool; 50. a first screw hole; 51. a second screw hole.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

The first embodiment is as follows:

referring to fig. 1 to 4, the present embodiment provides a motor 20 mounting structure 1 including: an outer case 10, the outer case 10 being provided with an accommodation space 130 and an output port communicating with the accommodation space 130; the motor 20, the motor 20 is arranged in the accommodating space 130, and the motor 20 is provided with an output shaft 200 which is matched and connected with the output port; the end cover 30, the end cover 30 is connected with the motor 20, and the end cover 30 is connected with the outer casing 10; the output shaft 200 is provided with a first end 210 located in the accommodating space 130 and far away from the output port, and a first matching distance X1 is formed between an end surface of the first end 210 and a corresponding inner wall of the outer casing 10.

In this embodiment, the output port is a port externally connected with a tool such as a grinding plate, one end of the output shaft 200 in the motor 20 is located at the output port, and the output port is a channel through which the accommodating space 130 in the outer casing 10 communicates with the outside. Meanwhile, the other end of the output shaft 200 opposite to the output port is located in the accommodating space 130 of the outer housing 10.

The motor 20 is not directly connected to the outer housing 10, but is connected to the end cover 30, and is connected to the outer housing 10 through the end cover 30, so as to fix the motor 20. Meanwhile, the output shaft 200 has a first end 210 penetrating an inner region of the motor 20 and protruding from a top of the motor 20. The top surface of the first end portion 210 protruding from the inner surface of the outer housing 10 is the end surface of the first end portion 210, and the first fitting distance X1 from the end surface of the first end portion 210 to the inner wall of the outer housing 10 is a fixed value and is greater than zero. Thereby make output shaft 200 set up inside outer casing 10, but when output shaft 200 carried out rotatory work, output shaft 200 can not touch with outer casing 10 to guarantee that output shaft 200 can not wear and tear the inner wall of outer casing 10, simultaneously, because motor 20 is not directly connected with outer casing 10, motor 20 is connected with outer casing 10 through this carrier of end cover 30, also outer casing 10 finally is connected through specific screw with end cover 30, thereby reaches the fixed to motor 20.

Specifically, the motor 20 and the end cap 30 may be structurally engaged to fix the motor 20.

Further, since the motor 20 is not directly mounted and connected to the outer casing 10, and the output shaft 200 in this embodiment does not touch the outer casing 10 during operation, i.e. does not wear and tear the outer casing 10, and the vibration generated by the operation and rotation of the output shaft 200 also has a small influence on the outer casing 10, the integrity and the service life of the outer casing 10 are protected, wherein the plastic outer casing 10 may be used to replace the aluminum outer casing 10 in the related art, and the plastic outer casing 10 has the advantages of lighter weight, lower cost and simpler processing process compared to the aluminum outer casing 10.

Example two:

referring to fig. 1 to 4, in the present embodiment, the motor 20 includes: a motor cover 230, the motor cover 230 being located at one side of the first end portion 210; a first protrusion 220, wherein the first protrusion 220 is connected to the motor cover 230, the first protrusion 220 protrudes toward the accommodating space 130, and the first end 210 is embedded in the first protrusion 220; the first boss 220 includes: the second end surface 221, the second end surface 221 and the corresponding inner wall of the outer casing 10 form a second matching distance X2.

In the present embodiment, the motor cover 230 is a cover-like structure on the top of the motor 20, that is, the motor cover 230 is used for covering and protecting the inside of the motor 20. Meanwhile, a corresponding protrusion is formed on one side of the motor cover 230, which is located at the first end 210, and is the first protrusion 220, the first end 210 passes through the first protrusion 220, the first protrusion 220 is provided with the second end 221, the distance from the second end 221 to the inner wall of the outer casing 10 is a second matching distance X2, and the second matching distance X2 also has a fixed value, and the fixed value is greater than zero.

Wherein, be provided with second cooperation distance X2, then can make motor cover 230 equally can not touch with the inner wall of outer casing 10 to guarantee that the vibrations that output shaft 200 produced at rotatory in-process can not transmit for outer casing 10 through motor cover 230 when transmitting for motor cover 230, thereby reduce the influence of output shaft 200 to outer casing 10.

Further, the first mating distance X1 is equal to the second mating distance X2. The first fitting distance X1 is equal to the second fitting distance X2, so that the first protruding portion 220 can be guaranteed to have a minimum influence on the rotation of the output shaft 200 where the first end portion 210 is located when the first protruding portion 220 has sufficient support for the first end portion 210.

Example four:

referring to fig. 5, in the present embodiment, the outer casing 10 further includes: the air duct 110, the air duct 110 communicates the accommodating space 130 with the outside of the opposite accommodating space 130.

In this embodiment, the air duct 110 disposed on the outer casing 10 communicates with the outside area of the outer casing 10 and the accommodating space 130 in the outer casing 10, so that the motor 20 has a certain air circulation during the use process, thereby reducing the use temperature of the motor 20 and achieving a good heat dissipation effect.

Example five:

referring to fig. 5, in the present embodiment, the air duct 110 includes: a first air inlet 111, wherein the first air inlet 111 is arranged at the handheld part of the outer casing 10; a second air inlet 112, wherein the second air inlet 112 is arranged at a position of the outer casing 10 for covering the motor 20; the cooling air flows between the first air port 111 and the second air port 112.

In this embodiment, the air duct 110 specifically includes a first air opening 111, the first air opening 111 is disposed on the outer casing 10 and close to a portion held by a user, the second air opening 112 is disposed at one end of the outer casing 10 located in the accommodating space 130, and a certain distance is provided between the first air opening 111 and the second air opening 112, so that the first air opening 111 and the second air opening 112 form a complete air duct 110, and the heat dissipation can be further performed on the motor 20.

Further, the second air opening 112 is disposed on the outer casing 10 at a position corresponding to the fan blade of the motor 20, so as to further dissipate heat and cool the motor 20. The second air opening 112 is specifically an air inlet, and the first air opening 111 is an air outlet.

Example six:

referring to fig. 5, in the present embodiment, the first tuyere 111 is provided with a grill structure 1110.

In the present embodiment, the grid structure 1110 can ensure that the structural strength of the first tuyere 111 can be enhanced under the condition that the first tuyere 111 has a sufficient air output. And since the first tuyere 111 is provided on the outer casing 10 at a position of the operator's hand-held portion, the strength of the outer casing 10 at the operator's hand-held portion is also ensured.

Further, the air ducts 110 are disposed at two opposite sides of the outer housing 10, that is, the outer housing 10 is formed by connecting a left portion and a right portion, and the air ducts 110 are disposed symmetrically on the left portion and the right portion of the outer housing 10. The oppositely arranged air ducts 110 can further enhance the heat dissipation effect brought by the air ducts 110.

Example eight:

referring to fig. 5, in the present embodiment, the outer wall periphery of the end cap 30 is provided with a second convex portion 310; a positioning boss 120 is arranged at one side of the outer casing 10 positioned in the accommodating space 130; wherein the second boss 310 is suspended to the positioning boss 120.

In the present embodiment, the end cap 30 is connected to the motor 20, and a second protrusion 310 is disposed on an outer region of the end cap 30, where the second protrusion 310 is a block protrusion structure. The positioning boss 120 is arranged on one side of the outer casing 10 located in the accommodating space 130, the positioning boss 120 is a boss structure that surrounds the output port by one circle, the second protruding portion 310 is suspended on the positioning boss 120, and then the end cover 30 and the outer casing 10 can be fixed, at this time, the outer casings 10 on both sides are covered outside the motor 20, the outer casings 10 on both sides are connected with the end cover 30 in the same manner, and the outer casings 10 on both sides are fixed by screws.

Further, the number of the second protrusions 310 is multiple, and the multiple second protrusions 310 are circumferentially arranged on the periphery of the end cover 30, as shown in fig. 5, the multiple second protrusions 310 are matched with the positioning bosses 120, so that the stability of the connection between the end cover 30 and the outer casing 10 can be further improved.

Further, the end cover 30 is provided with a first screw hole 50, the first screw hole 50 is aligned and matched with a second screw hole 51 arranged on the outer casing 10, and the first screw hole 50 and the second screw hole 51 are screwed through screws, so that the end cover 30 is further fixedly matched on the outer casing 10, that is, the connection strength between the end cover 30 and the outer casing 10 is enhanced. Specifically, the number of the first screw holes 50 is four, and the first screw holes are distributed at intervals on the periphery of the end cover 30, and correspondingly, the number of the second screw holes 51 is also four.

Example nine:

referring to fig. 6, in the present embodiment, the electric power tool 40 has the motor 20 mounting structure 1 of any one of the above embodiments.

Since the electric power tool 40 in the present embodiment has the motor 20 mounting structure 1 of any one of the embodiments described above, the electric power tool 40 in the present embodiment has the advantageous effects and the embodiments of any one of the embodiments described above.

Further, the electric tool 40 is embodied as an angle grinder. Specifically, the angle grinder is provided with a battery pack for supplying power to the angle grinder, a control panel is arranged inside the angle grinder and used for safety protection and program function setting, and for example, when the angle grinder is used, the operation of the angle grinder can be stopped when the current is too large.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention, and the scope of the present invention is defined by the appended claims.

Claims (10)

1. A motor mounting structure characterized by comprising:

an outer case provided with an accommodation space and an output port communicating with the accommodation space;

the motor is arranged in the accommodating space and is provided with an output shaft which is matched and connected with the output port;

the end cover is connected with the motor and the outer shell;

the output shaft is provided with a first end portion which is located in the accommodating space and is far away from the output port, and a first matching distance is formed between the end face of the first end portion and the corresponding inner wall of the outer shell.

2. The motor mounting structure according to claim 1, wherein the motor includes:

a motor cover located on one side of the first end;

the first bulge part is connected with the motor cover, the first bulge part bulges towards the accommodating space, and the first end part is embedded in the first bulge part;

the first boss includes:

a second end face forming a second mating distance with a corresponding inner wall of the outer housing.

3. The motor mounting structure of claim 2, wherein the first mating distance is equal to the second mating distance.

4. The motor mounting structure according to claim 1, wherein the outer case further comprises:

and the air duct is communicated with the accommodating space and the outside opposite to the accommodating space.

5. The motor mounting structure according to claim 4, wherein the air duct includes:

the first air opening is arranged at the handheld part of the outer shell;

the second air inlet is arranged at the position, used for coating the motor, of the outer shell;

wherein cooling air circulates between the first tuyere and the second tuyere.

6. The motor mounting structure according to claim 5, wherein the first tuyere is provided with a grid structure.

7. The motor mounting structure of claim 4, wherein the air ducts are provided at opposite sides of the outer housing.

8. The motor mounting structure according to any one of claims 1 to 7, wherein the outer wall periphery of the end cover is provided with a second boss;

a positioning boss is arranged on one side of the outer shell, which is positioned in the accommodating space;

wherein the second boss is suspended to the positioning boss.

9. A power tool characterized by having a motor mounting structure according to any one of claims 1 to 8.

10. The power tool according to claim 9, characterized in that the power tool is embodied as an angle grinder.

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