A sealing structure, a brushless motor, an air conditioner and a vehicle

Abstract

The application relates to the technical field of brushless motors, in particular to a sealing structure, which comprises an output terminal with a first section inserted into a connector main body and a second section connected with an external circuit; a first sealing assembly sleeved on the output terminal and extending into the connector main body; and a second sealing assembly sleeved on the first sealing assembly. The application provides an effective sealing structure, a brushless motor, an air conditioner and a car, which effectively prevent refrigerant from entering the external circuit through the connector main body and the output terminal.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of brushless motor, in particular to a sealing structure, a brushless motor, an air conditioner and a car. BACKGROUND

[0002] The brushless DC motor is composed of a motor body and a driver, and is a typical mechatronic product. Since the brushless DC motor operates in a self-control mode, it does not require an additional starting winding on the rotor like a synchronous motor with heavy load starting under frequency conversion speed regulation, and it also does not produce oscillation and out-of-step when the load suddenly changes.

[0003] In the motor, a coil, a connector connected to the coil, and an output terminal connected to one end of the connector are provided, and the other end of the output terminal is connected to an external circuit board. The coil generates heat during operation, and when the heat accumulates to a certain amount, the temperature of the coil rises, thereby affecting the service life of the coil, and in severe cases, the coil can be damaged. Therefore, when the precision requirement is high, the brushless motor that has been working for a long time needs to be cooled and circulated, and the heat of the coil is taken away by the coolant of the cooling cycle to ensure the precision and service life of the brushless motor. However, due to the setting of the coolant, the coolant enters the circuit board through the connector, thereby affecting the precision of the circuit board and even unable to work normally. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is to overcome the defect that the coolant enters the circuit board from the connector in the prior art, thereby affecting the normal work of the circuit board, and to provide a sealing structure, a brushless motor, an air conditioner and a car.

[0005] To solve the above technical problems, the present application provides a sealing structure, comprising:

[0006] an output terminal having a first section inserted into a connector body and a second section connected to an external circuit;

[0007] a first sealing assembly sleeved on the output terminal and extending into the connector body;

[0008] a second sealing assembly sleeved on the first sealing assembly.

[0009] Further, the first sealing assembly, the output terminal and the connector body are located on the same axis.

[0010] Further, the first sealing assembly comprises:

[0011] a first sealing ring sleeved in a groove on the first section;

[0012] a first plastic part sleeved on the output terminal and the first sealing ring and abutting against the inner wall of the connector body.

[0013] Further, the cross-sectional shape of the first plastic part is adapted to the cross-sectional shape of the output terminal.

[0014] Further, the first plastic part comprises:

[0015] The first sleeve and the second sleeve are connected to each other, the diameter of the first sleeve is smaller than that of the second sleeve, and the second sleeve is inserted into the connector body and abuts against the inner wall of the connector body.

[0016] Further, the first plastic part further comprises a first protrusion formed on the second sleeve and used for supporting the second sleeve on the connector body, and the distance from the first protrusion to the axis of the output terminal is equal to the distance from the outer peripheral wall of the connector body to the axis of the output terminal.

[0017] Further, the sealing structure further comprises a connecting structure, which comprises:

[0018] An opening is formed on the inner wall of the connector body and has a sharp corner arranged vertically downward;

[0019] A second protrusion is formed on the second sleeve, is adapted to the opening, and is adapted to the insertion of the second sleeve.

[0020] Further, the first plastic part and the connector body are ultrasonically welded.

[0021] Further, the second sealing assembly comprises:

[0022] A second sealing ring is sleeved on the second sleeve and is located above the first protrusion;

[0023] A second plastic part is sleeved on the first sleeve and has a lap joint part connected to the second sleeve.

[0024] The application further provides a brushless motor comprising the sealing structure.

[0025] The application further provides an air conditioner comprising the brushless motor.

[0026] The application further provides an automobile comprising the air conditioner.

[0027] The application has the following advantages:

[0028] 1. The present invention provides a sealing structure comprising: an output terminal having a first section inserted into a connector body and a second section connected to an external circuit; a first sealing assembly sleeved on the output terminal and extending into the connector body; and a second sealing assembly sleeved on the first sealing assembly. By securing the first sealing assembly to the connector body and sleeved on the outer peripheral wall of the first sealing assembly on the output terminal, the structure effectively blocks the refrigerant from entering the external circuit from the bottom of the connector body through the output terminal, or from entering the external circuit from the outer peripheral wall of the connector body through the output terminal. This prevents the refrigerant from entering the external circuit through the connector, thereby ensuring the operating accuracy and normal operation of the external circuit, allowing the brushless motor to operate for a long time and thereby improving operating efficiency.

[0029] 2. In a sealing structure provided by the present invention, the first sealing component, the output terminal, and the connector body are located on the same axis, thereby ensuring the accuracy of the output terminal and the first sealing component being installed on the connector body.

[0030] 3. The present invention provides a sealing structure, wherein the connection structure comprises: an opening formed on the inner wall of the connector body and having a vertically downwardly directed sharp corner; and a second protrusion formed on the second sleeve, adapted to fit within the opening and suitable for insertion of the second sleeve. The provision of this sharp corner ensures that when the first plastic component is welded to the connector body, the plastic melts when the softening point of the first plastic component is exceeded during welding. The melted liquid drips onto the sharp corner, thereby fully connecting with the connector body and improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 A schematic diagram of the structure of the connector provided by the present invention and the output terminal;

[0033] Figure 2 for Figure 1 A top view of

[0034] Figure 3 It is a structural schematic diagram of the sealing structure;

[0035] Figure 4 for Figure 3The structure of the central cusp is schematic;

[0036] Description of reference numerals:

[0037] 1-connector body; 2-output terminal; 3-first section; 4-second section; 41-slot body; 5-first sealing assembly; 6-first sealing ring; 7-first plastic part; 8-first sleeve; 9-second sleeve; 10-first protrusion; 11-opening; 12-pointed corner; 13-second protrusion; 14-second sealing assembly; 15-second sealing ring; 16-second plastic part; 17-lap joint; 18-connector; DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] like Figures 1-4 As shown, an embodiment of the present invention provides a sealing structure comprising a connector body 1, an output terminal 2, a first sealing assembly 5, and a second sealing assembly 14. This sealing structure is provided in a brushless motor having a coil. A connector 18 is provided between the output terminal 2 and the coil. The other end of the output terminal 2 is connected to an external circuit. Connector 18 includes a connector body 1 connected to the output terminal 2.

[0041] The output terminal 2 has a first section 3 inserted into the connector body 1 and a second section 4 connected to an external circuit;

[0042] A first sealing assembly 5 is sleeved on the output terminal 2 and extends into the connector body 1;

[0043] The second sealing assembly 14 is sleeved on the first sealing assembly 5 .

[0044] Since the connector is connected with the output terminal 2 and the coil, and transmits the electric signal when the coil rotates, a first channel is arranged at the bottom of the connector, and a second channel is formed by the outer wall of the connector body 1 and the output terminal 2. When the coolant is arranged in the brushless motor to cool the coil, the coolant will enter the external circuit through the first channel and the second channel, which will affect the accuracy of the external circuit. The first sealing assembly 5 is arranged on the output terminal 2, and the second sealing assembly 14 is arranged on the outer wall of the first sealing assembly 5, which effectively prevents the coolant from entering the external circuit through the first channel or the second channel, thereby ensuring the working accuracy and normal operation of the external circuit, so that the brushless motor can operate for a long time, thereby improving the working efficiency.

[0045] As shown in Figure 3 In this embodiment, the first sealing assembly 5, the output terminal 2 and the connector body 1 are located on the same axis, which ensures the accuracy of the installation of the output terminal 2 and the first sealing assembly 5 on the connector body 1.

[0046] The first sealing assembly 5 comprises a first sealing ring 6 and a first plastic part 7.

[0047] The first sealing ring 6 is sleeved on the groove 41 of the first section 3, and the roughness of the surface of the groove is 1.6. The first sealing ring 6 is an O-ring.

[0048] The first plastic part 7 is sleeved on the output terminal 2 and the first sealing ring 6, thereby fixing the first sealing ring 6 on the output terminal 2, and also plays a role of secondary sealing of the output terminal 2. The first plastic part 7 abuts against the inner wall of the connector body 1, thereby limiting the position of the output terminal 2 through the first plastic part 7.

[0049] In this embodiment, the diameter of the first section 3 of the output terminal 2 is greater than the diameter of the second section 4, and the cross-sectional shape of the first plastic part 7 is matched with the cross-sectional shape of the output terminal 2. The specific shape of the output terminal 2 is determined according to actual needs.

[0050] The first plastic part 7 comprises a first sleeve 8 and a second sleeve 9 connected with each other. Since the diameter of the first section 3 of the output terminal 2 is greater than the diameter of the second section 4, the diameter of the first sleeve 8 is smaller than the diameter of the second sleeve 9, thereby being fully matched with the output terminal 2 and improving the sealing effect. The second sleeve 9 is inserted into the connector body 1 and abuts against the inner wall of the connector body 1, thereby fully fixing the output terminal 2.

[0051] In the embodiment, the first plastic part 7 further comprises a first protrusion 10 formed on the second sleeve 9 for supporting the second sleeve 9 on the connector body 1, and the distance from the first protrusion 10 to the axis of the output terminal 2 is equal to the distance from the outer wall of the connector body 1 to the axis of the output terminal 2. The first protrusion 10 limits the position of the second sleeve 9 inserted into the connector body 1, and also fixes the second sleeve 9. In the embodiment, the outer wall of the first protrusion 10 is in the same straight line with the outer wall of the connector body 1.

[0052] In the embodiment, the first plastic part 7 and the connector body 1 are ultrasonically welded. Ultrasonic welding is to transmit high-frequency vibration waves to the surfaces of two objects to be welded, and under pressure, the surfaces of the two objects are rubbed to form a fusion between the molecular layers. The surfaces of the two objects to be welded are the connector body 1 and the first plastic part 7.

[0053] As shown in Figure 4 The sealing structure further comprises a connecting structure, which comprises an opening 11 formed on the inner wall of the connector body 1 and having a sharp corner 12 arranged vertically downward;

[0054] The second protrusion 13 is formed on the second sleeve 9 and is adapted to the insertion of the second sleeve 9.

[0055] Since the connector 18 is generally made of a metal part coated with plastic, during the injection molding process, due to the different shrinkage rates between the plastic and the metal part, the plastic will cause the metal part to displace when it shrinks, resulting in a shift in the position of the output terminal 2 when it is installed, or a certain angle of deviation between the output terminal 2 and the connector body 1, which causes the output terminal 2 to be unable to be arranged vertically in the connector body 1. By inserting the first plastic part 7 into the connector body 1 and abutting against the inner wall of the connector body 1, the position of the output terminal 2 is further limited by the first plastic part 7, thereby maintaining the installation precision between the output terminal 2 and the connector body 1 and preventing the installation position and angle of the output terminal 2 from being deviated.

[0056] The sharp corner 12 is arranged to cause the first plastic part 7 to be melted when it is welded on the connector body 1, and the melted liquid drops on the sharp corner 12, thereby being fully connected with the connector body 1 and improving the sealing effect. In the embodiment, the sharp corner 12 is a downward triangular sharp corner 12 formed by the opening 11 of the inner wall of the connector body 1. The height of the sharp corner 12 is 0.35 mm, and the included angle with the inside of the connector body 1 is 60 degrees.

[0057] The first sleeve 8 is matched with the first section 3 of the output terminal 2 by means of base shaft, the second sleeve 9 is matched with the second section 4 of the output terminal 2 by means of base hole, and the tolerance matching is adopted, after the sealing structure is assembled, the ultrasonic welding machine is welded, the position degree of the output terminal 2 can be effectively corrected, thereby the difficulty of injection molding is reduced.

[0058] The second sealing assembly 14 comprises a second sealing ring 15 and a second plastic part 16.

[0059] The second sealing ring 15 is sleeved on the second sleeve 9 and located above the first protrusion 10, and in the embodiment, the second sealing ring 15 is an O-shaped ring.

[0060] The second plastic part 16 is sleeved on the first sleeve 8 and has a lap joint part 17 connected with the second sleeve 9, and in the embodiment, the lap joint part 17 is an L-shaped part arranged on the second plastic part 16, thereby being well connected with the second sleeve 9 and improving the stability of the second plastic part 16.

[0061] The application further provides a brushless motor comprising the sealing structure.

[0062] The application further provides an air conditioner comprising the brushless motor.

[0063] The application further provides a car comprising the air conditioner.

[0064] Obviously, the above embodiment is only an example for clearly illustrating, and is not a limitation to the embodiment. Other different forms of changes or variations can be made on the basis of the above description for the ordinary skilled in the art. All the embodiments do not need to be exhausted, and the obvious changes or variations still fall within the protection scope of the application.

Claims

1. A sealing structure, characterized in that: include: An output terminal (2) having a first section (3) inserted into a connector body (1) and a second section (4) connected to an external circuit, wherein the diameter of the first section (3) is larger than the diameter of the second section (4); A first sealing component (5) is sleeved on the output terminal (2) and extends into the connector body (1); The first sealing assembly (5) comprises: A first sealing ring (6) is sleeved in the groove (41) on the first section (3); A first plastic part (7) is sleeved on the output terminal (2) and the first sealing ring (6), and abuts against the inner wall of the connector body (1); The first plastic part (7) comprises: a first sleeve (8) and a second sleeve (9) connected to each other, wherein the diameter of the first sleeve (8) is smaller than the diameter of the second sleeve (9), and the second sleeve (9) is inserted into the connector body (1) and abuts against the inner wall of the connector body (1); A second sealing assembly (14) is sleeved on the first sealing assembly (5); The second sleeve (9) is sleeved on the first section (3), and the first sleeve (8) is sleeved on the second section (4); the second sealing assembly (14) is sleeved on the outer surface of the first sleeve (8); and the outer wall of the output terminal (2) at the maximum diameter on which the first sealing assembly (5) and the second sealing assembly (14) are sleeved is in the same straight line as the outer wall of the connector body (1).

2. The sealing structure according to claim 1, wherein: The first sealing component (5), the output terminal (2), and the connector body (1) are located on the same axis.

3. The sealing structure according to claim 1, wherein: The cross-sectional shape of the first plastic part (7) is compatible with the cross-sectional shape of the output terminal (2).

4. The sealing structure according to claim 1, wherein: The first plastic part (7) further comprises a first protrusion (10) formed on the second sleeve (9) and used for placing the second sleeve (9) on the connector body (1), and the distance between the first protrusion (10) and the central axis of the output terminal (2) is equal to the distance between the outer peripheral wall of the connector body (1) and the central axis of the output terminal (2).

5. The sealing structure according to claim 4, characterized in that: Also included is a connection structure, the connection structure comprising: An opening (11) formed on the inner wall of the connector body (1) and having a sharp corner (12) arranged vertically downward; The second protrusion (13) is formed on the second sleeve (9), matches the opening (11), and is suitable for the insertion of the second sleeve (9).

6. The sealing structure according to claim 1, wherein: The first plastic part (7) and the connector body (1) are welded by ultrasonic welding.

7. The sealing structure according to claim 4 or 5, characterized in that: The second sealing assembly (14) comprises: A second sealing ring (15) is sleeved on the second sleeve (9) and is located above the first protrusion (10); The second plastic part (16) is sleeved on the first sleeve (8) and has a lap joint (17) connected to the second sleeve (9).

8. A brushless motor, characterized in that: The sealing structure comprises the sealing structure according to any one of claims 1 to 7.

9. An air conditioner, characterized in that: Including the brushless motor according to claim 8.

10. An automobile, characterized in that: Including the air conditioner according to claim 9.

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