A high-speed motor for small household appliances

Abstract

The utility model relates to a high -speed motor for small household electrical appliances, including high -speed motor on the rectangular main casing, the front end of main casing is formed with the thickened base of rectangle, the middle part of thickened base front end surface is formed with the concave platform of circle, the thickened base front end surface of thickened base outside is formed with the annular sealing groove of circle, and the sealing ring is inserted and is fixed in sealing groove, the thickened base front end surface close to thickened base four corners is formed with four concave holes of circle respectively, and the middle part of concave hole bottom surface is formed with the air hole that communicates with main casing inner chamber, the thickened base is inserted with the air bag of cap -like and communicates with air hole in concave hole, and the outer ring of air bag is clamped and fixed between the bottom surface of concave hole and the round compression ring, and the compression ring is set up in the outside of air bag and is screwed and fixed in the concave hole of thickened base.

Description

Technical fields:

[0001] This utility model relates to the technical field of household appliance motors, and more specifically to a high-speed motor for small household appliances. Background technology:

[0002] Household appliance motors are electric motors used in household appliances to drive various electrical devices and are currently the most common type of motor. Existing household appliance motors are generally not fully enclosed and lack waterproofing. However, some appliances require high-speed motors that are also waterproof. For waterproof motors, fully enclosed motors are the preferred choice. However, high-speed operation of a motor generates a large amount of heat, which causes the gas inside the motor to expand, increasing the air pressure. While this increased air pressure does not affect the motor's operation, it does affect its waterproof sealing performance. Therefore, for high-speed, fully enclosed waterproof motors, a structure for balancing the internal air pressure needs to be designed. Utility model content:

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing a high-speed motor for small household appliances. The mounting base of the motor housing has been modified by adding a structure for mounting an airbag, which uses the expansion and contraction of the airbag to balance the internal pressure of the motor.

[0004] A high-speed motor for small household appliances includes a rectangular main housing, a sealed rear cover fixedly connected to the rear end of the main housing, a rectangular thickened base formed at the front end of the main housing, mounting holes formed at the four corners of the thickened base, a circular recess formed in the middle of the front end face of the thickened base, a shaft hole formed in the center of the recess, a motor shaft inserted into the shaft hole, an annular sealing groove formed on the front end face of the thickened base outside the recess, a sealing ring inserted and fixed in the sealing groove, and four circular recesses formed on the front end face of the thickened base near the four corners of the thickened base, with a vent hole connected to the inner cavity of the main housing formed in the middle of the bottom surface of the recess.

[0005] A cap-shaped airbag connected to a vent is inserted into the recess of the thickened base. The outer ring of the airbag is clamped and fixed between a circular pressure ring and the bottom surface of the recess. The pressure ring is sleeved on the outside of the airbag and screwed and fixed in the recess of the thickened base.

[0006] An arc-shaped vent groove connected to the concave hole is formed on the thickened base between the adjacent concave holes, and an vent port connected to the arc-shaped vent groove is formed in the middle of the outer wall of the thickened base.

[0007] Preferably, the depth of the recess on the thickened base is greater than the length of the airbag, and the diameter of the recess is greater than the diameter of the outer wall of the airbag.

[0008] The outer wall of the airbag is formed with a wavy, annular wrinkle.

[0009] Preferably, the recessed hole on the thickened base consists of a smooth hole in the front middle part and a threaded hole in the rear part, and the pressure ring is screwed into the threaded hole in the rear part of the recessed hole;

[0010] The pressure ring is formed with several actuation holes.

[0011] Preferably, the front end of the sealing ring extends beyond the front end face of the thickened base.

[0012] Preferably, the central axis of the recessed platform on the thickened base, the central axis of the shaft hole, and the central axis of the sealing groove are all on the central axis of the motor shaft;

[0013] The arc-shaped exhaust groove has its center located on the central axis of the motor shaft, and the concave holes are evenly distributed in a ring around the central axis of the motor shaft.

[0014] Preferably, the exhaust port and the arc-shaped exhaust groove respectively penetrate the front end face of the thickened base, the depth of the exhaust port and the depth of the arc-shaped exhaust groove are the same and less than the depth of the concave hole, and the depth of the concave hole is less than the thickness of the thickened base.

[0015] Preferably, the inner ring at the front end of the pressure ring is formed with rounded corners, and the sides at both ends of the arc-shaped exhaust groove are respectively formed with chamfers.

[0016] The beneficial effects of this utility model are as follows:

[0017] The mounting base of the motor housing has been modified, and a structure for mounting airbags has been added. The expansion and contraction of the airbags are used to balance the internal pressure of the motor. Attached image description:

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a front view of the structure of this utility model;

[0020] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure at point AA.

[0021] In the figure: 1. Main housing; 11. Thickened base; 12. Mounting hole; 13. Recessed platform; 14. Shaft hole; 15. Sealing groove; 16. Recessed hole; 17. Arc-shaped exhaust groove; 18. Exhaust port; 19. Vent hole; 2. Sealing back cover; 3. Sealing ring; 4. Airbag; 5. Pressure ring; 51. Actuation hole. Detailed implementation method:

[0022] Example: See Figures 1 to 3As shown, a high-speed motor for small household appliances includes a rectangular main housing 1, a sealed rear cover 2 fixedly connected to the rear end of the main housing 1, a rectangular thickened base 11 formed at the front end of the main housing 1, mounting holes 12 formed at the four corners of the thickened base 11, a circular recess 13 formed in the middle of the front end face of the thickened base 11, a shaft hole 14 formed in the center of the recess 13, a motor shaft inserted into the shaft hole 14, an annular sealing groove 15 formed on the front end face of the thickened base 11 outside the recess 13, a sealing ring 3 inserted and fixed in the sealing groove 15, and four circular recesses 16 formed on the front end face of the thickened base 11 near the four corners of the thickened base 11, and a vent hole 19 connected to the inner cavity of the main housing 1 formed in the middle of the bottom surface of the recesses 16.

[0023] A cap-shaped airbag 4 connected to a vent hole 19 is inserted into the recess 16 of the thickened base 11. The outer ring of the airbag 4 is clamped and fixed between the circular pressure ring 5 and the bottom surface of the recess 16. The pressure ring 5 is sleeved on the outside of the airbag 4 and screwed and fixed in the recess 16 of the thickened base 11.

[0024] An arc-shaped exhaust groove 17 communicating with the recess 16 is formed on the thickened base 11 between the adjacent recesses 16, and an exhaust port 18 communicating with the arc-shaped exhaust groove 17 is formed in the middle of the outer side wall of the thickened base 11.

[0025] The depth of the recess 16 on the thickened base 11 is greater than the length of the airbag 4, and the diameter of the recess 16 is greater than the diameter of the outer wall of the airbag 4; thus, the airbag 4 expands under the internal pressure of the motor, and the recess 16 provides space for the expansion of the airbag 4.

[0026] The outer wall of the airbag 4 is formed with a wavy annular wrinkle, which can be stretched when the airbag 4 is inflated, thereby increasing the space inside the airbag 4.

[0027] The recess 16 on the thickened base 11 consists of a smooth hole in the front middle and a threaded hole in the rear. The pressure ring 5 is screwed into the threaded hole in the rear of the recess 16. The advantage of setting the smooth hole in the recess 16 is to prevent the inflated airbag 4 from pressing against the thread of the recess 16, thereby preventing the thread teeth from causing damage and leakage to the airbag 4.

[0028] The pressure ring 5 is formed with a plurality of actuating holes 51, which facilitate the rotation and screwing of the pressure ring 5 and its disassembly.

[0029] The front end of the sealing ring 3 extends beyond the front end face of the thickened base 11, thereby achieving a seal.

[0030] The central axis of the recess 13 on the thickened base 11, the central axis of the shaft hole 14, and the central axis of the sealing groove 15 are all on the central axis of the motor shaft.

[0031] The arc-shaped exhaust groove 17 has its arc center located on the central axis of the motor shaft, and the concave holes 16 are evenly distributed in a ring around the central axis of the motor shaft.

[0032] The exhaust port 18 and the arc-shaped exhaust groove 17 respectively penetrate the front end face of the thickened base 11. The depth of the exhaust port 18 and the depth of the arc-shaped exhaust groove 17 are the same and less than the depth of the concave hole 16. The depth of the concave hole 16 is less than the thickness of the thickened base 11. The concave hole 16 needs a certain distance of depth to provide space for the airbag 4 to expand. However, the exhaust port 18 and the arc-shaped exhaust groove 17 do not need to be very deep, as long as they do not affect the entry and exit of gas or water.

[0033] The inner ring at the front end of the pressure ring 5 is formed with rounded corners, and the sides at both ends of the arc-shaped exhaust groove 17 are respectively formed with chamfers. Both the rounded corners and chamfers are used to prevent damage to the airbag 4 during inflation.

[0034] Working principle: This structure is a high-speed motor for small household appliances. The main improvement of the high-speed motor is on the main housing 1 of the motor. First, the mounting base is thickened, that is, the thickened base 11. The thickened base 11 can provide a mounting base for the airbag 4 and can also meet the expansion of the airbag 4.

[0035] Furthermore, when the air pressure inside the motor increases due to heat, the air bag 4 expands, the space inside the air bag 4 increases, which increases the volume of the motor's inner cavity, thereby balancing the air pressure.

[0036] When the airbag 4 inflates, it occupies a large volume of the recess 16. The air in the recess 16 is discharged through the arc-shaped exhaust groove 17 and the exhaust port 18. The airbag 4 is hidden in the thickened base 11 of the main shell 1, and the thickened base 11 protects the airbag 4.

[0037] The embodiments described above are illustrative of the present invention and are not intended to limit the present invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be as set forth in the claims.

Claims

1. A high-speed motor for small household appliances, comprising a rectangular main housing (1) of the high-speed motor, a sealing back cover (2) fixedly connected to the rear end of the main housing (1), a rectangular thickened base (11) formed at the front end of the main housing (1), mounting holes (12) formed at the four corners of the thickened base (11), a circular recess (13) formed at the center of the front end face of the thickened base (11), a shaft hole (14) formed at the center of the recess (13), a motor shaft inserted into the shaft hole (14), and an annular sealing groove (15) formed on the front end face of the thickened base (11) outside the recess (13), a sealing ring (3) fixedly inserted into the sealing groove (15), characterized in that: Four circular recesses (16) are formed on the front surface of the thickened base (11) near the four corners of the base (11). A vent (19) connected to the inner cavity of the main shell (1) is formed in the middle of the bottom surface of the recesses (16). A cap-shaped airbag (4) connected to the ventilation hole (19) is inserted into the recess (16) of the thickened base (11). The outer ring of the airbag (4) is clamped and fixed between the circular pressure ring (5) and the bottom surface of the recess (16). The pressure ring (5) is sleeved on the outside of the airbag (4) and screwed and fixed in the recess (16) of the thickened base (11). An arc-shaped vent groove (17) communicating with the concave hole (16) is formed on the thickened base (11) between adjacent concave holes (16), and an vent (18) communicating with the arc-shaped vent groove (17) is formed in the middle of the outer side wall of the thickened base (11).

2. The high-speed motor for small household appliances according to claim 1, characterized in that: The depth of the recess (16) on the thickened base (11) is greater than the length of the airbag (4), and the diameter of the recess (16) is greater than the diameter of the outer wall of the airbag (4). The outer wall of the airbag (4) is formed with a wavy annular wrinkle.

3. A high-speed motor for small household appliances according to claim 2, characterized in that: The recessed hole (16) on the thickened base (11) consists of a smooth hole in the front middle part and a threaded hole in the rear part, and the pressure ring (5) is screwed into the threaded hole in the rear part of the recessed hole (16); The pressure ring (5) is formed with a plurality of actuation holes (51).

4. A high-speed motor for small household appliances according to claim 1, characterized in that: The front end of the sealing ring (3) extends out of the front end face of the thickened base (11).

5. A high-speed motor for small household appliances according to claim 1, characterized in that: The central axis of the recess (13) on the thickened base (11), the central axis of the shaft hole (14) and the central axis of the sealing groove (15) are all on the central axis of the motor shaft; The arc center of the arc-shaped exhaust groove (17) is located on the central axis of the motor shaft, and the concave holes (16) are evenly distributed in a ring around the central axis of the motor shaft.

6. A high-speed motor for small household appliances according to claim 1, characterized in that: The exhaust port (18) and the arc-shaped exhaust groove (17) respectively penetrate the front end face of the thickened base (11). The depth of the exhaust port (18) and the depth of the arc-shaped exhaust groove (17) are the same and less than the depth of the concave hole (16). The depth of the concave hole (16) is less than the thickness of the thickened base (11).

7. A high-speed motor for small household appliances according to claim 1, characterized in that: The inner ring at the front end of the pressure ring (5) is formed with rounded corners, and the sides at both ends of the arc-shaped exhaust groove (17) are respectively formed with chamfers.

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