Blower motor of vehicle air conditioning system

Abstract

The invention discloses a vehicle air conditioning system blower motor, which comprises a stator assembly, a rotor assembly, a support assembly and an end cover assembly, and is characterized in that the stator assembly is composed of a shell and two magnets, and the rotor assembly is composed of a bearing, a commutator, two insulating end plates, a rotor core, an enameled wire and a motor shaft; the support assembly is composed of a carbon brush support, a support mounting plate and a rubber pad. The end cover assembly is composed of a carbon brush, a spiral spring, a crimping terminal, an inductor, a capacitor, a positive terminal, a negative terminal, a wave washer, an end cover and the like. According to the motor, the positive terminal and the negative terminal are connected with an external power supply, after direct current is filtered through the capacitor and the inductor, the current flows into the rotor assembly through the carbon brush, a continuously changing armature magnetic field is formed under the commutation effect of the commutator and interacts with a main magnetic field, and the motor shaft rotates in the preset direction; the motor is simple in structure, small in size, light in weight, few in processing technology, and low in material cost and processing cost, so that the adaptability of the motor is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of motors, and in particular relates to a blower motor for a vehicle air conditioning system. Background Art

[0002] As an important component of the vehicle air conditioning system, the automotive air conditioning blower motor drives the fan blades to circulate the air inside the vehicle and adjust the temperature and humidity inside the vehicle. The blower motors currently used on the market are divided into two types: BDC (brushed DC) and BLDC (brushless DC). Although the BDC motor has a sophisticated and complex structure, its cost is much lower than that of the BLDC motor, and its market share is more than 3 times that of the BLDC. However, with the continuous development of vehicle air conditioning systems, there is a demand for vehicle rear air conditioning blower motors, which have smaller motor power and size and lower cost.

[0003] Under the above background, a low-power, small-size, light-weight and low-priced rear blower motor is needed in the market, and thus a blower motor for a vehicle air-conditioning system is proposed. Summary of the invention

[0004] The object of the present invention is to provide a blower motor for a vehicle air conditioning system to solve the existing problems.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a blower motor for a vehicle air conditioning system, comprising a stator assembly, a rotor assembly, a bracket assembly and an end cover assembly, wherein the stator assembly is composed of a shell and two magnets, the two magnets are symmetrically fixed on the inner wall of the shell by epoxy resin glue, and a plurality of heat dissipation holes are opened on one end surface of the shell; The rotor assembly is composed of bearing A, commutator, two insulating end plates, rotor core, enameled wire, bearing B and motor shaft. The side surface of the motor shaft is sequentially installed with bearing A, commutator, rotor core and bearing B from left to right. The rotor core and commutator are connected by enameled wire. The two insulating end plates are symmetrically installed at both ends of the rotor core. The insulating end plates are sleeved on the side surface of the motor shaft. The bearing B is installed in the bearing seat of the housing. The bracket assembly is composed of a carbon brush bracket, a bracket mounting plate and a rubber pad, wherein the carbon brush bracket is mounted on the bracket mounting plate by riveting, the rubber pad is plugged into the mounting angle of the bracket mounting plate, and the rubber pad is installed in the mounting groove provided in the housing; The end cover assembly consists of a carbon brush A, a carbon brush B, a coil spring, a crimping terminal, an inductor A, an inductor B, a capacitor, a positive terminal, a negative terminal, a corrugated washer, an end cover and solder; the corrugated washer is arranged in a bearing seat of the end cover, the inductor A, the inductor B, the capacitor, the positive terminal and the negative terminal are all installed on the end cover, the capacitor is connected to a positive terminal and a negative terminal on both sides respectively, the inductor A and the inductor B are connected to the positive terminal and the negative terminal by soldering; the carbon brush A and the carbon brush B are connected to the inductor A and the inductor B by crimping terminals; a coil spring is arranged on one end face of the carbon brush A and the carbon brush B, the carbon brush A, the carbon brush B and the coil spring are all installed in a carbon brush bracket, the coil spring applies pressure to the carbon brush A and the carbon brush B, so that the carbon brush A and the carbon brush B are in contact with the commutator; the end cover is fixedly connected to the housing.

[0006] In one embodiment, the positive terminal and the negative terminal are electrically connected to an external power source and are connected in parallel with a capacitor.

[0007] In one of the embodiments, the position of the magnet is adapted to the rotor core, and the magnet is made of ferrite material.

[0008] In one embodiment, the carbon brush A and the carbon brush B have the same structure, and the inductor A and the inductor B have the same structure.

[0009] In one embodiment, the shape and electrical properties of the carbon brush A are adapted to the carbon brush holder, and the carbon brush A and the carbon brush holder cooperate with each other.

[0010] In one embodiment, the bearing A and the bearing B have the same structure, and the inner rings of the bearing A and the bearing B are interference fit with the motor shaft.

[0011] In one of the embodiments, the carbon brush holder is formed by stamping and bending of brass material, and the bearing seats of the housing and the end cover are designed with clearance fit and clearance grooves.

[0012] In one embodiment, the bearing A and the bearing B are both double-sided rubber sealed ball bearings.

[0013] The present invention has the following beneficial effects: The motor of the present invention has a simple design structure, is not only small in size and light in weight, but also requires few processing techniques, and has low material and processing costs, thereby increasing the adaptability of the motor.

[0014] The present invention also has the following advantages: 1. The double-shaft design of the motor shaft meets the requirements of the double impeller installation of the rear blower. The double D-section design at the shaft end makes the subsequent installation of the impeller simpler, lowers the cost, and improves the balance.

[0015] 2. The carbon brush holder is made of brass by stamping and bending. Compared with plastic mold parts, it has a simple structure and is easy to install.

[0016] 3. The bearing adopts double-sided rubber sealed ball bearing, which reduces the intrusion of carbon powder and prolongs the life of the motor. 4. The motor housing and end cover adopt clearance fit and clearance groove design in the bearing seat design, which makes the motor concentricity better and reduces vibration and noise.

[0017] 5. The position and contact surface design of the commutator and carbon brush make the spark generated during commutation smaller and the electromagnetic compatibility better.

[0018] 6. The selection of two inductors and one capacitor makes the overall motor better meet the customer's electromagnetic compatibility design requirements.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0021] Figure 1 An exploded diagram of a blower motor for a vehicle air conditioning system; Figure 2 A front view of a blower motor for a vehicle air conditioning system; Figure 3 for Figure 2 Middle BB section; Figure 4 It is a schematic diagram of the shell structure in the present invention; Figure 5 An exploded view of the rotor assembly in the present invention with the enameled wire removed; Figure 6 It is a schematic diagram of the structure of the bracket assembly in the present invention; Figure 7 It is a schematic diagram of the structure of the end cover assembly in the present invention.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Stator assembly; 101. Housing; 102. Magnet; 2. Rotor assembly; 201. Bearing A; 202. Commutator; 203. Insulating end plate; 204. Rotor core; 205. Enameled wire; 206. Bearing B; 207. Motor shaft; 3. Bracket assembly; 301. Carbon brush bracket; 302. Bracket mounting plate; 303. Rubber pad; 4. End cover assembly; 401. Carbon brush A; 402. Carbon brush B; 403. Coil spring; 404. Crimp terminal; 405. Inductor A; 406. Inductor B; 407. Capacitor; 408. Positive terminal; 409. Negative terminal; 410. Corrugated washer; 411. End cover. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] See also Figure 1-Figure 7 As shown, the present invention is a blower motor for a vehicle air conditioning system, comprising a stator assembly 1, a rotor assembly 2, a bracket assembly 3 and an end cover assembly 4. The stator assembly 1 is composed of a housing 101 and two magnets 102. The two magnets 102 are symmetrically fixed on the inner wall of the housing 101 by epoxy resin glue. The magnets 102 are made of ferrite material and serve as the main magnetic field of the motor. A plurality of heat dissipation holes are opened on one end surface of the housing 101. The material and material thickness of the housing 101 meet the magnetic leakage design, and the area of ​​the heat dissipation holes meets the temperature rise test requirements of the motor. The rotor assembly 2 is composed of a bearing A201, a commutator 202, two insulating end plates 203, a rotor core 204, an enameled wire 205, a bearing B206 and a motor shaft 207. The side surface of the motor shaft 207 is sequentially installed with the bearing A201, the commutator 202, the rotor core 204 and the bearing B206 from left to right. The rotor core 204 is connected to the commutator 202 through the enameled wire 205. The two insulating end plates 203 are symmetrically installed at both ends of the rotor core 204. The insulating end plates 203 are sleeved around the motor shaft 207. Side view; the position of the magnet 102 is adapted to the rotor core 204, and the bearing B206 is installed in the bearing seat of the housing 101; the current is commutated through the commutator 202, and an armature magnetic field is generated in the rotor core 204 when passing through the enameled wire 205, and the motor shaft 207 is driven to rotate under the action of the main magnetic field. The insulating end plate 203 ensures the insulation between the enameled wire 205 and the rotor core 204, and the bearing B206 and the bearing A201 are respectively matched with the stator assembly 1 and the end cover assembly 4 to support the motor shaft 207.

[0027] The bracket assembly 3 consists of a carbon brush bracket 301, a bracket mounting plate 302 and a rubber pad 303. The carbon brush bracket 301 is mounted on the bracket mounting plate 302 by riveting. The rubber pad 303 is plugged into the mounting corner of the bracket mounting plate 302. The rubber pad 303 is installed in the mounting groove opened in the shell 101, wherein the rubber pad 303 plays a role of buffering and shock absorption.

[0028] The end cover assembly 4 is composed of a carbon brush A401, a carbon brush B402, a coil spring 403, a crimping terminal 404, an inductor A405, an inductor B406, a capacitor 407, a positive terminal 408, a negative terminal 409, a corrugated washer 410, an end cover 411 and solder; the corrugated washer 410 is arranged in the bearing seat of the end cover 411, and its shape and thickness ensure the requirements of the axial movement of the motor; the inductor A405, the inductor B406, the capacitor 407, the positive terminal 408, the negative terminal 409, the corrugated washer 410, the end cover 411 and solder; the corrugated washer 410 is arranged in the bearing seat of the end cover 411, and its shape and thickness ensure the requirements of the axial movement of the motor; the inductor A405, the inductor B4 06, capacitor 407, positive terminal 408, negative terminal 409 are all installed on the end cover 411, among which, inductor A405, inductor B406 and capacitor 407 play the role of filtering and noise reduction; the positive terminal 408 and negative terminal 409 are connected to the two sides of capacitor 407 respectively, and inductor A405 and inductor B406 are connected to the positive terminal 408 and negative terminal 409 through soldering; carbon brush A401 and carbon brush B4 02 is connected with inductor A405 and inductor B406 through crimping terminal 404; carbon brush A401 and carbon brush B402 are provided with coil spring 403 on one end surface, carbon brush A401, carbon brush B402 and coil spring 403 are installed in carbon brush bracket 301, coil spring 403 applies pressure to carbon brush A401 and carbon brush B402, so that carbon brush A401 and carbon brush B402 are in contact with commutator 202; end cover 411 is fixedly connected to the housing 101; the current flows into the rotor assembly 2 from the positive terminal 408, the inductor A405, and the carbon brush A401 in sequence, and then flows out from the carbon brush B402, the inductor B406, and the negative terminal 409. The coil spring 403 is installed in the carbon brush holder 301 and applies pressure to the carbon brush A401 and the carbon brush B402 to keep the carbon brush A401 and the carbon brush B402 in good contact with the commutator 202.

[0029] Furthermore, the positive terminal 408 and the negative terminal 409 are electrically connected to an external power source and are connected in parallel to the capacitor 407 .

[0030] Furthermore, carbon brush A401 and carbon brush B402 have the same structure, and inductor A405 and inductor B406 have the same structure.

[0031] Furthermore, the shape and electrical properties of the carbon brush A401 are compatible with the carbon brush holder 301 , and the carbon brush A401 and the carbon brush holder 301 cooperate with each other.

[0032] Furthermore, the bearing A201 and the bearing B206 have the same structure, and the inner rings of the bearing A201 and the bearing B206 are both interference fit with the motor shaft 207 .

[0033] Furthermore, the carbon brush holder 301 is formed by stamping and bending of brass material, which has a simple structure and is easy to install compared to plastic mold parts; the bearing seats of the housing 101 and the end cover 411 are designed with clearance fit and give way grooves, so that the motor has better concentricity and less vibration and noise.

[0034] Furthermore, both bearing A201 and bearing B206 use double-sided rubber sealed ball bearings, and the sealing lips are fluororubber, which reduces the intrusion of carbon powder and prolongs the life of the motor.

[0035] See also Figure 1-Figure 7 As shown, this embodiment is a working principle of a blower motor for a vehicle air conditioning system: the positive terminal 408 and the negative terminal 409 are connected to an external power supply, and after the parallel capacitor 407 and the series inductor A405 and the inductor B406 filter the DC power, the current flows into the rotor assembly 2 through the carbon brush A401 and the carbon brush B402, and a constantly changing armature magnetic field is formed under the commutation action of the commutator 202, which interacts with the main magnetic field to make the motor shaft 207 rotate in a predetermined direction.

[0036] It should be further explained that the motor design has the following advantages: the motor shaft 207 double-shaft design meets the customer's requirements for the installation of double impellers in the rear blower, and the double D-section design on the shaft end makes the subsequent installation of the impeller simpler, lower cost, and better balanced.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A blower motor for a vehicle air conditioning system, comprising a stator assembly (1), a rotor assembly (2), a bracket assembly (3) and an end cover assembly (4), characterized in that: The stator assembly (1) is composed of a housing (101) and two magnets (102); the two magnets (102) are symmetrically fixed to the inner wall of the housing (101) by epoxy resin glue; and a plurality of heat dissipation holes are provided on one end surface of the housing (101); The rotor assembly (2) is composed of a bearing A (201), a commutator (202), two insulating end plates (203), a rotor core (204), an enameled wire (205), a bearing B (206) and a motor shaft (207); the bearing A (201), the commutator (202), the rotor core (204) and the bearing B (206) are sequentially mounted on the circumferential side surface of the motor shaft (207) from left to right; the rotor core (204) and the commutator (202) are connected via the enameled wire (205); the two insulating end plates (203) are symmetrically mounted at both ends of the rotor core (204); the insulating end plates (203) are sleeved on the circumferential side surface of the motor shaft (207); and the bearing B (206) is mounted in a bearing seat of the housing (101); The bracket assembly (3) is composed of a carbon brush bracket (301), a bracket mounting plate (302) and a rubber pad (303); the carbon brush bracket (301) is mounted on the bracket mounting plate (302) by riveting; the rubber pad (303) is plugged into a mounting angle of the bracket mounting plate (302); and the rubber pad (303) is mounted in a mounting groove provided in the housing (101); The end cover assembly (4) comprises a carbon brush A (401), a carbon brush B (402), a coil spring (403), a crimping terminal (404), an inductor A (405), an inductor B (406), a capacitor (407), a positive terminal (408), a negative terminal (409), a corrugated washer (410), an end cover (411), and solder; the corrugated washer (410) is arranged in a bearing seat of the end cover (411); the inductor A (405), the inductor B (406), the capacitor (407), the positive terminal (408), and the negative terminal (409) are all installed on the end cover (411); the capacitor (407) is connected to a positive terminal (408) and a negative terminal (409) on both sides; the inductor A (405) and the inductor B (406) are connected to the positive terminal (408) and the negative terminal (409) on both sides; B (406) is connected to the positive terminal (408) and the negative terminal (409) by soldering; the carbon brush A (401) and the carbon brush B (402) are connected to the inductor A (405) and the inductor B (406) by crimping terminals (404); a coil spring (403) is provided on one end surface of the carbon brush A (401) and the carbon brush B (402); the carbon brush A (401), the carbon brush B (402) and the coil spring (403) are all installed in the carbon brush bracket (301); the coil spring (403) applies pressure to the carbon brush A (401) and the carbon brush B (402), so that the carbon brush A (401) and the carbon brush B (402) are in contact with the commutator (202); the end cover (411) is fixedly connected to the housing (101).

2. A blower motor for a vehicle air conditioning system according to claim 1, characterized in that: The positive terminal (408) and the negative terminal (409) are electrically connected to an external power source and are connected in parallel to the capacitor (407).

3. The blower motor of a vehicle air conditioning system according to claim 1, characterized in that: The position of the magnet (102) is adapted to the rotor core (204), and the magnet (102) is made of ferrite material.

4. A blower motor for a vehicle air conditioning system according to claim 1, characterized in that: The carbon brush A (401) and the carbon brush B (402) have the same structure, and the inductor A (405) and the inductor B (406) have the same structure.

5. The blower motor of a vehicle air conditioning system according to claim 1, characterized in that: The shape and electrical properties of the carbon brush A (401) are compatible with the carbon brush holder (301), and the carbon brush A (401) and the carbon brush holder (301) cooperate with each other.

6. A blower motor for a vehicle air conditioning system according to claim 1, characterized in that: The bearing A (201) and the bearing B (206) have the same structure, and the inner rings of the bearing A (201) and the bearing B (206) are both interference fit with the motor shaft (207).

7. A blower motor for a vehicle air conditioning system according to claim 1, characterized in that: The carbon brush bracket (301) is formed by stamping and bending of brass material, and the bearing seats of the housing (101) and the end cover (411) are designed with clearance fit and a clearance groove.

8. The blower motor of a vehicle air conditioning system according to claim 1, characterized in that: The bearing A (201) and the bearing B (206) are both double-sided rubber sealed ball bearings.

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