Brushed blower motor and vehicle air conditioning system

Abstract

The present application relates to the technical field of vehicle air conditioning system, and discloses a brush blower motor and a vehicle air conditioning system. The brush blower motor comprises a casing, a stator assembly and a rotor assembly arranged in the casing, a rear cover and a connector assembly, wherein the rear cover is connected with the casing; the connector assembly comprises a brush plate arranged on the inner side of the rear cover; the connector assembly further comprises a damping pad arranged in a trapezoidal shape, wherein the short side of the trapezoidal shape is close to the bottom wall of the rear cover; the connector assembly further comprises an electric brush and a constant force spring, wherein the brush plate is arranged in the rear cover, the electric brush and the constant force spring are arranged on the brush plate, and the constant force spring abuts against the electric brush with a preset elastic force; the brush plate and the rear cover are integrally formed by plastic. By arranging the trapezoidal damping pad between the brush plate and the inner wall of the rear cover, the contact area between the damping pad and the rear cover is increased, so that the smooth buffering effect is achieved when the brush blower motor is working, thereby effectively reducing the vibration and noise.

Description

Technical Field

[0001] This invention relates to the field of automotive air conditioning system technology, and more particularly to a brushed blower motor and an automotive air conditioning system. Background Technology

[0002] As competition intensifies in the new energy vehicle market, customers are placing increasingly higher demands on overall vehicle comfort, with stricter requirements for lightweight design of automotive air conditioning systems and overall vehicle comfort. Simultaneously, as product competition in the automotive market becomes more intense, OEMs are setting higher cost requirements for automotive components. Among these, the blower assembly is a core component of the automotive air conditioning system, and the noise and vibration of the motor within the blower assembly significantly impact customers' overall evaluation of vehicle comfort.

[0003] In the existing technology, the motor is relatively heavy and has low weight reduction; at the same time, the vibration of the motor in the blower assembly results in high noise; in addition, the effective length of the brushes in the motor is limited, resulting in a short service life of the motor.

[0004] Therefore, there is an urgent need for a brushed blower motor and automotive air conditioning system to solve the above problems. Summary of the Invention

[0005] Based on the above, the purpose of this invention is to provide a brushed blower motor and an automotive air conditioning system that are lightweight, have low noise, and have a longer service life.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The brushed blower motor includes a housing and a stator assembly and a rotor assembly disposed within the housing, and further includes:

[0008] Rear cover, which is connected to the housing;

[0009] The connector assembly includes a brush plate disposed inside the rear cover. The connector assembly also includes a vibration damping pad, which is trapezoidal with its shorter side close to the bottom wall of the rear cover. The connector assembly further includes a brush and a constant-force spring. The brush plate is disposed within the rear cover, and both the brush and the constant-force spring are located on the brush plate. The constant-force spring abuts against the brush with a preset elastic force. Both the brush plate and the rear cover are integrally molded from plastic.

[0010] As a preferred embodiment of a brushed blower motor, the short side of the trapezoidal vibration damping pad is set to 62mm-68mm, and the long side is set to 72mm-78mm.

[0011] As a preferred embodiment of a brushed blower motor, the side wall of the rear cover is provided with a vibration damping through hole, the inner wall of the rear cover is provided with a vibration damping groove along the circumference of the vibration damping through hole, the two sides of the vibration damping pad are provided with vibration damping lugs, the vibration damping pad is at least partially placed in the vibration damping through hole, and the vibration damping lugs abut against the bottom of the vibration damping groove.

[0012] As a preferred embodiment of a brushed blower motor, the brush plate includes a retaining ring and mounting plates disposed on both sides of the retaining ring. The vibration damping pad is disposed at the end of the mounting plate away from the retaining ring. A brush box is disposed on the mounting plate, and the brush is disposed inside the brush box. The retaining ring, the mounting plate, and the brush box are integrally formed.

[0013] As a preferred embodiment of a brushed blower motor, the mounting plate is provided with a ventilation opening, which is connected to the brush box.

[0014] As a preferred embodiment of a brushed blower motor, the mounting plate is further provided with a spring mounting groove, and the constant force spring is configured as a spring sheet structure, including a mounting end and a compression end. The mounting end is disposed in the spring mounting groove, and the compression end abuts against the brush.

[0015] As a preferred embodiment of a brushed blower motor, the rear cover is provided with a bearing mounting groove, the bottom of the bearing mounting groove is provided with a drainage hole, and the side wall of the bearing mounting groove is provided with a drainage groove, which is connected to the drainage hole.

[0016] As a preferred embodiment of the brushed blower motor, a waterproof wall is provided on the top of the bearing mounting groove, and the waterproof wall is located between adjacent drainage grooves.

[0017] As a preferred embodiment of the brushed blower motor, the brushed blower motor further includes a front cover, which is located at the end of the housing away from the rear cover, and the front cover is provided with multiple weight reduction holes.

[0018] The vehicle air conditioning system includes the brushed blower motor described in any of the above solutions.

[0019] The beneficial effects of this invention are as follows:

[0020] This invention utilizes plastic for both the rear cover and the brush plate of the connector assembly. The plastic material effectively reduces the overall weight of the brushed blower motor, improving its lightweight design. Furthermore, it offers noise reduction and sound absorption, decreasing the motor's noise level. Vibration damping pads, shaped like trapezoids with their shorter sides close to the bottom wall of the rear cover, increase the contact area between the pads and the cover, providing smooth buffering during operation and effectively reducing vibration and noise. A constant-force spring with significant compression is used to press the brushes with a preset elastic force, increasing the effective brush length and extending the motor's lifespan. In summary, this brushed blower motor offers advantages such as low vibration, low noise, lightweight design, and long lifespan. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0022] Figure 1 This is a half-sectional schematic diagram of a brushed blower motor provided in a specific embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the connector assembly of the brushed blower motor provided in a specific embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the rear cover and brush plate of the brushed blower motor provided in a specific embodiment of the present invention.

[0025] Figure 4 This is a schematic diagram of the vibration damping pad of the brushed blower motor provided in a specific embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the rear cover of the brushed blower motor provided in a specific embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the cooperation between the brush and the constant force spring of the brushed blower motor provided in a specific embodiment of the present invention.

[0028] In the picture:

[0029] 110. Housing; 120. Stator assembly; 130. Rotor assembly;

[0030] 200. Rear cover; 210. Vibration damping through hole; 220. Vibration damping groove; 230. Bearing mounting groove; 231. Drainage hole; 232. Drainage groove; 233. Waterproof wall;

[0031] 300. Connector assembly; 310. Brush plate; 311. Protective ring; 312. Mounting plate; 3121. Brush holder; 3122. Vent; 3123. Spring mounting slot; 3124. Mounting protrusion; 320. Vibration damping pad; 321. Vibration damping lug; 322. Mounting through hole; 330. Brush; 340. Constant force spring; 341. Mounting end; 342. Compression end;

[0032] 400, front cover; 410, weight reduction hole. Detailed Implementation

[0033] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0034] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0035] Unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0038] like Figures 1-3 As shown, this embodiment provides a brushed blower motor and an automotive air conditioning system. The brushed blower motor includes a housing 110 and a stator assembly 120 and a rotor assembly 130 disposed within the housing 110. It also includes a rear cover 200 and a connector assembly 300, with the rear cover 200 connected to the housing 110. The connector assembly 300 includes a brush plate 310 disposed inside the rear cover 200. The connector assembly 300 also includes a vibration damping pad 320, which is trapezoidal with its shorter side close to the bottom wall of the rear cover 200. The connector assembly 300 also includes a brush 330 and a constant force spring 340. The brush plate 310 is disposed inside the rear cover 200, and both the brush 330 and the constant force spring 340 are disposed on the brush plate 310. The constant force spring 340 abuts against the brush 330 with a preset elastic force. Both the brush plate 310 and the rear cover 200 are integrally molded from plastic.

[0039] By using plastic for both the rear cover 200 and the brush plate 310 of the connector assembly 300, the plastic material effectively reduces the overall weight of the brushed blower motor, improving its lightweight design. It also provides noise reduction and sound absorption, decreasing the motor's noise level. A vibration damping pad 320, trapezoidal in shape with its shorter side close to the bottom wall of the rear cover 200, increases the contact area between the pad and the cover, providing smooth buffering during operation and effectively reducing vibration and noise. A constant-force spring 340 with significant compression presses against the brush 330 with a preset elastic force, increasing the effective length of the brush 330 and extending the motor's lifespan. In summary, the brushed blower motor offers advantages such as low vibration, low noise, lightweight design, and long lifespan.

[0040] For example, the short side of the trapezoidal vibration damping pad 320 is set to 62mm-68mm, and the long side is set to 72mm-78mm. Preferably, the short side of the vibration damping pad 320 is set to 66mm, and the long side is set to 76mm.

[0041] Specifically, such as Figure 4 and Figure 5 As shown, a vibration-damping through hole 210 is provided on the side wall of the rear cover 200 for inserting a vibration-damping pad 320. Further, a vibration-damping groove 220 is provided circumferentially along the vibration-damping through hole 210 on the inner wall of the rear cover 200, and vibration-damping lugs 321 are provided on both sides of the vibration-damping pad 320. When at least a portion of the vibration-damping pad 320 is placed within the vibration-damping through hole 210, the vibration-damping lugs 321 can abut against the bottom of the groove 220. The vibration-damping lugs 321 not only prevent the vibration-damping pad 320 from falling out of the vibration-damping through hole 210, but also further increase the contact area between the vibration-damping pad 320 and the inner wall of the rear cover 200, thereby improving the vibration damping and noise reduction effect. Optionally, the vibration-damping pad 320 is made of rubber.

[0042] In this embodiment, as Figure 2 and Figure 6 As shown, the connector assembly 300 also includes a connector. The brush plate 310 includes a retaining ring 311 and mounting plates 312 disposed on both sides of the retaining ring 311. The height of the retaining ring 311 is set to 10mm, which can effectively block the brush 330 from the commutation device. A vibration damping pad 320 is disposed at the end of the mounting plate 312 away from the retaining ring 311. Specifically, the end of the mounting plate 312 away from the retaining ring 311 is provided with a mounting protrusion 3124, and the vibration damping pad 320 is provided with a mounting through hole 322, so that the mounting protrusion 3124 can be placed in the mounting hole. At the same time, the connector assembly 300 is provided with a total of four vibration damping pads 320, so that the force is more evenly distributed, thereby more effectively reducing the transmission of the vibration of the brush 330 to the rear cover 200, so as to achieve a better vibration reduction and noise reduction effect.

[0043] To facilitate the installation of the brush 330, a brush box 3121 is provided on the mounting plate 312, and the brush 330 is disposed in the brush box 3121. It is worth noting that the brush 330 in this embodiment is an extended type brush 330, in order to increase the effective length of the brush 330 when working, and improve the reliability and service life of the brushed blower motor when working.

[0044] Furthermore, to facilitate the installation of the constant force spring 340, a spring mounting groove 3123 is provided on the mounting plate 312. The constant force spring 340 is configured as a spring sheet structure, including a mounting end 341 and a compression end 342. The mounting end 341 is located in the spring mounting groove 3123, and the compression end 342 abuts against the brush 330.

[0045] Preferably, the mounting plate 312 is provided with a ventilation port 3122, which communicates with the brush box 3121. By providing the ventilation port 3122, not only can the brush 330 be better cooled, optimizing the friction environment during operation and extending the lifespan of the brushed blower motor, but it also facilitates the timely removal of carbon powder worn from the brush 330, ensuring its normal operation. Optionally, each mounting plate 312 is provided with two ventilation ports 3122, for a total of four ventilation ports 3122, further improving the efficiency of heat dissipation and carbon powder removal.

[0046] It is worth noting that the protective ring 311, mounting plate 312 and brush box 3121 are integrated and all made of plastic, which not only improves the weight reduction, but also improves the reliability of the connection between the protective ring 311, mounting plate 312 and brush box 3121.

[0047] As an alternative solution for brushed blower motors, such as Figure 5 As shown, the rear cover 200 is provided with a bearing mounting groove 230 for mounting bearings. A drain hole 231 is provided at the bottom of the bearing mounting groove 230. Furthermore, a drain groove 232 is provided on the side wall of the bearing mounting groove 230, and the drain groove 232 communicates with the drain hole 231. The arrangement of the drain groove 232 and drain hole 231 facilitates the drainage of cooling water, thereby eliminating the accumulation of cooling water that could lead to bearing corrosion, and thus avoiding abnormal noise caused by bearing corrosion. Optionally, six drain holes 231 and six drain grooves 232 are provided to improve drainage efficiency.

[0048] Preferably, a waterproof wall 233 is provided on the top of the bearing mounting groove 230. The waterproof wall 233 is provided between adjacent drainage grooves 232. By providing the waterproof wall 233, cooling water can be effectively prevented from entering the bearing, and thus flow out of the bearing mounting groove 230 from the drainage groove 232 and the drainage hole 231.

[0049] In this embodiment, as Figure 1 As shown, the brushed blower motor also includes a front cover 400, which is located at the end of the housing 110 away from the rear cover 200. The front cover 400 is provided with multiple weight reduction holes 410, which helps to further improve the lightweighting of the brushed blower motor.

[0050] This embodiment also discloses an automotive air conditioning system, including a brushed blower motor as described in any of the above embodiments. The automotive air conditioning system equipped with the aforementioned brushed blower motor is lighter, vibrates less, has lower noise, and has a longer service life. Furthermore, vehicles equipped with the aforementioned automotive air conditioning system offer greater comfort and are more competitive in the market.

[0051] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. A brushed blower motor, comprising a housing (110) and a stator assembly (120) and a rotor assembly (130) disposed within the housing (110), characterized in that, Also includes: Rear cover (200), the rear cover (200) being connected to the housing (110); A connector assembly (300) includes a brush plate (310) disposed on the inner side of the rear cover (200). The connector assembly (300) also includes a vibration damping pad (320), which is trapezoidal in shape to increase the contact area between the vibration damping pad (320) and the rear cover (200), thereby reducing vibration and noise. The shorter side of the trapezoid is close to the bottom wall of the rear cover (200). The connector assembly (300) also includes a brush (330) and a constant force spring (340). The brush plate (310) is disposed inside the rear cover (200). Both the brush (330) and the constant force spring (340) are disposed on the brush plate (310). The constant force spring (340) abuts against the brush (330) with a preset elastic force. Both the brush plate (310) and the rear cover (200) are integrally molded from plastic. The short side of the trapezoidal vibration damping pad (320) is set to 62mm-68mm, and the long side is set to 72mm-78mm; The brush plate (310) includes a protective ring (311) and mounting plates (312) disposed on both sides of the protective ring (311). The vibration damping pad (320) is disposed at one end of the mounting plate (312) away from the protective ring (311). A brush box (3121) is disposed on the mounting plate (312), and the electric brush (330) is disposed inside the brush box (3121). The protective ring (311), the mounting plate (312), and the brush box (3121) are integrally formed.

2. The brushed blower motor according to claim 1, characterized in that, The back cover (200) has a vibration damping through hole (210) on its side wall. The inner wall of the back cover (200) has a vibration damping groove (220) along the circumference of the vibration damping through hole (210). The vibration damping pad (320) has vibration damping lugs (321) on both sides. The vibration damping pad (320) is at least partially placed in the vibration damping through hole (210), and the vibration damping lugs (321) abut against the bottom of the groove (220).

3. The brushed blower motor according to claim 1, characterized in that, The mounting plate (312) is provided with a vent (3122), which is connected to the brush box (3121).

4. The brushed blower motor according to claim 1, characterized in that, The mounting plate (312) is also provided with a spring mounting groove (3123). The constant force spring (340) is configured as a spring sheet structure, including a mounting end (341) and a compression end (342). The mounting end (341) is disposed in the spring mounting groove (3123), and the compression end (342) abuts against the brush (330).

5. The brushed blower motor according to claim 1, characterized in that, The rear cover (200) is provided with a bearing mounting groove (230), the bottom of the bearing mounting groove (230) is provided with a drain hole (231), and the side wall of the bearing mounting groove (230) is provided with a drain groove (232), which is connected to the drain hole (231).

6. The brushed blower motor according to claim 5, characterized in that, A waterproof wall (233) is provided on the top of the bearing mounting groove (230), and the waterproof wall (233) is provided between adjacent drainage grooves (232).

7. The brushed blower motor according to any one of claims 1-6, characterized in that, The brushed blower motor also includes a front cover (400), which is located at one end of the housing (110) away from the rear cover (200), and the front cover (400) is provided with a plurality of weight-reducing holes (410).

8. A vehicle air conditioning system, characterized in that, Including the brushed blower motor as described in any one of claims 1-7.

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