Brush blower motor and vehicle air conditioning system

Abstract

The invention relates to the technical field of vehicle air conditioning systems, 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, the stator assembly and the rotor assembly are arranged in the casing, the brush blower motor further comprises a rear cover and a connector assembly, and the rear cover is connected with the casing; the plug-in connector assembly comprises a brush plate, the brush plate is arranged on the inner side of the rear cover, the plug-in connector assembly is further provided with a damping pad, the damping pad is arranged to be in a trapezoid shape, and the short edge of the trapezoid is close to the bottom wall of the rear cover. The plug-in connector assembly further comprises an electric brush and a constant-force spring, the brush plate is arranged in the rear cover, the electric brush and the constant-force spring are both arranged on the brush plate, and the constant-force spring abuts against the electric brush with preset elastic force; and the brush plate and the rear cover are integrally formed by plastic. The trapezoidal anti-vibration pad is arranged between the brush plate and the inner wall of the rear cover and used for increasing the contact area of the anti-vibration pad and the rear cover, so that when the brush blower motor works, the smooth buffering effect is achieved, and vibration and noise are effectively reduced.

Description

Technical Field

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

[0002] As the iterative competition in the new energy vehicle market intensifies, customers have higher and higher requirements for vehicle comfort, and are increasingly demanding lightweight design of automotive air-conditioning systems and the comfort of the entire vehicle. At the same time, as product competition in the automotive market becomes increasingly fierce, OEMs are increasingly demanding the cost of automotive parts. Among them, the blower assembly is a core component of the automotive air-conditioning box, and the noise and vibration of the motor in the blower assembly affect the customer's comprehensive evaluation of the comfort of the vehicle.

[0003] In the prior art, the motor has a large mass and a low degree of lightweighting. At the same time, due to the vibration of the motor in the blower assembly, the noise is relatively high. In addition, the effective length of the brush 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 a vehicle air conditioning system to solve the above problems. Summary of the invention

[0005] Based on the above, the object of the present invention is to provide a brushed blower motor and a vehicle air conditioning system, which are highly lightweight, have low noise and longer service life.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A brushed blower motor comprises a housing, a stator assembly and a rotor assembly arranged in the housing, and further comprises:

[0008] A rear cover connected to the housing;

[0009] The connector assembly includes a brush plate, which is arranged on the inner side of the rear cover. The connector assembly is also provided with a vibration-damping pad, which is arranged in a trapezoidal shape, and the short side of the trapezoid is close to the bottom wall of the rear cover; the connector assembly also includes a brush and a constant force spring, the brush plate is arranged in the rear cover, the brush and the constant force spring are both arranged on the brush plate, and the constant force spring abuts against the brush with a preset elastic force; the brush plate and the rear cover are both integrally formed of plastic.

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

[0011] As a preferred solution for the brush blower motor, a vibration-damping through hole is arranged on the side wall of the rear cover, a vibration-damping groove is arranged on the inner wall of the rear cover along the circumference of the vibration-damping through hole, vibration-damping lugs are arranged on both sides of the vibration-damping pad, 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 solution for a brush blower motor, the brush plate includes a guard ring and mounting plates arranged on both sides of the guard ring, the vibration damping pad is arranged at one end of the mounting plate away from the guard ring, a brush box is arranged on the mounting plate, and the brush is arranged in the brush box; the guard ring, the mounting plate and the brush box are arranged integrally.

[0013] As a preferred solution for the brush blower motor, a vent is provided on the mounting plate, and the vent is communicated with the brush box.

[0014] As a preferred solution for the brush blower motor, a spring mounting groove is also provided on the mounting plate, 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 solution for the brush 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, the side wall of the bearing mounting groove is provided with a drainage groove, and the drainage groove is connected to the drainage hole.

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

[0017] As a preferred solution of the brush blower motor, the brush blower motor further includes a front cover, the front cover is arranged at an end of the casing away from the rear cover, and a plurality of weight-reducing holes are arranged on the front cover.

[0018] A vehicle air conditioning system includes a brushed blower motor as described in any of the above schemes.

[0019] The beneficial effects of the present invention are:

[0020] The present invention sets the brush plates of the rear cover and the connector assembly to plastic. On the one hand, the plastic material can effectively reduce the overall weight of the brush blower motor, thereby improving the lightweight degree of the brush blower motor; on the other hand, it also has a certain noise reduction and sound absorption effect, thereby reducing the noise of the brush blower motor. A vibration damping pad is set between the brush plate and the inner wall of the rear cover, and the vibration damping pad is set to a trapezoid, and the short side of the trapezoid is close to the bottom wall of the rear cover, so as to increase the contact area between the vibration damping pad and the rear cover, so that when the brush blower motor is working, it plays a smoothing and buffering role, thereby effectively reducing vibration and noise. A constant force spring with a large compression amount is set to press the brush with a preset elastic force, so that the effective length of the brush is increased, thereby improving the service life of the brush blower motor. In summary, the brush blower motor has the advantages of low vibration, low noise, lightweight, and long life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

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

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

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

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

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

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

[0028] In the figure:

[0029] 110, housing; 120, stator assembly; 130, rotor assembly;

[0030] 200, rear cover; 210, vibration reduction through hole; 220, vibration reduction groove; 230, bearing mounting groove; 231, drainage hole; 232, drainage groove; 233, waterproof wall;

[0031] 300, connector assembly; 310, brush plate; 311, retaining ring; 312, mounting plate; 3121, brush box; 3122, vent; 3123, spring mounting groove; 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 DESCRIPTION

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

[0034] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0035] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0038] like Figure 1-Figure 3 As shown, the present embodiment provides a brushed blower motor and a vehicle air conditioning system, wherein the brushed blower motor comprises a housing 110 and a stator assembly 120 and a rotor assembly 130 arranged in the housing 110, and further comprises a rear cover 200 and a connector assembly 300, wherein the rear cover 200 is connected to the housing 110; the connector assembly 300 comprises a brush plate 310, wherein the brush plate 310 is arranged on the inner side of the rear cover 200, and the connector assembly 300 is further provided with a vibration-damping pad 320, wherein the vibration-damping pad 320 is arranged in a trapezoidal shape, and the short side of the trapezoid is close to the bottom wall of the rear cover 200; the connector assembly 300 further comprises a brush 330 and a constant force spring 340, wherein the brush plate 310 is arranged in the rear cover 200, and the brush 330 and the constant force spring 340 are both arranged on the brush plate 310, and the constant force spring 340 abuts against the brush 330 with a preset elastic force; the brush plate 310 and the rear cover 200 are both integrally formed of plastic.

[0039] By setting the brush plate 310 of the rear cover 200 and the connector assembly 300 to plastic, the plastic material can effectively reduce the overall weight of the brush blower motor and improve the lightweight degree of the brush blower motor; on the other hand, it also has a certain noise reduction and sound absorption effect, reducing the noise of the brush blower motor. By setting a vibration damping pad 320 between the brush plate 310 and the inner wall of the rear cover 200, and setting the vibration damping pad 320 to a trapezoid, and placing the short side of the trapezoid close to the bottom wall of the rear cover 200, it is used to increase the contact area between the vibration damping pad 320 and the rear cover 200, so that when the brush blower motor is working, it plays a smoothing and buffering role, thereby effectively reducing vibration and noise. By setting a constant force spring 340 with a large compression amount, it is used to press the brush 330 with a preset elastic force, so that the effective length of the brush 330 is increased, thereby improving the service life of the brush blower motor. In summary, the brush blower motor has the advantages of low vibration, low noise, lightweight, and long life.

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

[0041] Specifically, 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 on the inner wall of the rear cover 200 along the circumference of the vibration-damping through hole 210, and vibration-damping convex ears 321 are provided on both sides of the vibration-damping pad 320. When at least part of the vibration-damping pad 320 is placed in the vibration-damping through hole 210, the vibration-damping convex ears 321 can abut against the groove bottom of the vibration-damping groove 220. The provision of the vibration-damping convex ears 321 can not only prevent the vibration-damping pad 320 from slipping 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-reducing effect. Optionally, the vibration-damping pad 320 is made of rubber.

[0042] In this embodiment, Figure 2 and Figure 6 As shown, the connector assembly 300 also includes a connector, and the brush plate 310 includes a retaining ring 311 and a mounting plate 312 arranged on both sides of the retaining ring 311, wherein the height of the retaining ring 311 is set to 10 mm, which can effectively block the brush 330 and the commutation device. The vibration-damping pad 320 is arranged 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, and 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 uniform, and then the vibration of the brush 330 can be more effectively reduced to be transmitted to the rear cover 200, so as to achieve a better vibration reduction and noise reduction effect.

[0043] To achieve the installation of the brush 330, a brush box 3121 is provided on the mounting plate 312, and the brush 330 is arranged in the brush box 3121; it is worth noting that the brush 330 in this embodiment adopts an extended brush 330 to increase the effective length of the brush 330 when working, thereby improving the reliability and service life of the brush blower motor when working.

[0044] Furthermore, in order to achieve the installation of the constant force spring 340, a spring installation groove 3123 is also 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 disposed in the spring installation groove 3123, and the compression end 342 abuts against the brush 330.

[0045] Preferably, the mounting plate 312 is provided with a vent 3122, which is in communication with the brush box 3121. By providing the vent 3122, not only can the brush 330 have a better heat dissipation effect, the friction environment of the brush 330 when working can be optimized, and the life of the brush blower motor can be improved; it is also conducive to the timely discharge of carbon powder worn by the brush 330 when working, ensuring the normal operation of the brush 330. Optionally, two vents 3122 are provided on each mounting plate 312, for a total of four vents 3122, to improve the efficiency of heat dissipation and discharge of carbon powder.

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

[0047] As an alternative to brush blower motors, Figure 5 As shown, the rear cover 200 is provided with a bearing installation groove 230 for installing a bearing. A drainage hole 231 is provided at the bottom of the bearing installation groove 230. Further, a drainage groove 232 is provided on the side wall of the bearing installation groove 230, and the drainage groove 232 is connected to the drainage hole 231. The arrangement of the drainage groove 232 and the drainage hole 231 can facilitate the discharge of cooling water, thereby eliminating the rust of the bearing caused by the accumulation of cooling water, thereby avoiding the abnormal noise caused by the rust of the bearing. Optionally, six drainage holes 231 and six drainage grooves 232 are provided respectively to improve the drainage effect.

[0048] Preferably, 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. By providing the waterproof wall 233, the cooling water can be effectively prevented from penetrating into the bearing, thereby flowing out of the bearing mounting groove 230 from the drainage groove 232 and the drainage hole 231.

[0049] In this embodiment, Figure 1 As shown, the brush blower motor also includes a front cover 400, which is disposed at one end of the housing 110 away from the rear cover 200. The front cover 400 is provided with a plurality of weight-reducing holes 410, which is beneficial to further improve the lightweight degree of the brush blower motor.

[0050] This embodiment also discloses a vehicle air conditioning system, including a brushed blower motor as described in any of the above schemes. The vehicle air conditioning system provided with the brushed blower motor is more lightweight, has less vibration, less noise, and has a longer service life. Furthermore, the vehicle provided with the vehicle air conditioning system is more comfortable and more competitive in the market.

[0051] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A brushed blower motor, comprising a housing (110) and a stator assembly (120) and a rotor assembly (130) disposed in the housing (110), characterized in that: Also includes: A rear cover (200), the rear cover (200) being connected to the housing (110); A connector assembly (300) comprises a brush plate (310), wherein the brush plate (310) is arranged on the inner side of the rear cover (200), and the connector assembly (300) is also provided with a vibration-damping pad (320), wherein the vibration-damping pad (320) is arranged in a trapezoidal shape, and the short side of the trapezoid is close to the bottom wall of the rear cover (200); the connector assembly (300) further comprises a brush (330) and a constant force spring (340), wherein the brush plate (310) is arranged in the rear cover (200), the brush (330) and the constant force spring (340) are both arranged on the brush plate (310), and the constant force spring (340) abuts against the brush (330) with a preset elastic force; the brush plate (310) and the rear cover (200) are both integrally formed of plastic.

2. The brushed blower motor according to claim 1, characterized in that: The short side length of the trapezoidal vibration-damping pad (320) is set to 62 mm-68 mm, and the long side length is set to 72 mm-78 mm.

3. The brushed blower motor according to claim 1, characterized in that: A vibration-damping through hole (210) is provided on the side wall of the rear cover (200), a vibration-damping groove (220) is provided on the inner wall of the rear cover (200) along the circumference of the vibration-damping through hole (210), vibration-damping lugs (321) are provided on both sides of the vibration-damping pad (320), the vibration-damping pad (320) is at least partially disposed in the vibration-damping through hole (210), and the vibration-damping lugs (321) abut against the bottom of the vibration-damping groove (220).

4. The brush blower motor according to claim 1, characterized in that: The brush plate (310) comprises a guard ring (311) and mounting plates (312) arranged on both sides of the guard ring (311); the vibration-damping pad (320) is arranged at one end of the mounting plate (312) away from the guard ring (311); a brush box (3121) is arranged on the mounting plate (312); and the brush (330) is arranged in the brush box (3121); the guard ring (311), the mounting plate (312) and the brush box (3121) are arranged in one piece.

5. The brush blower motor according to claim 4, characterized in that: The mounting plate (312) is provided with a vent (3122), and the vent (3122) is in communication with the brush box (3121).

6. The brush blower motor according to claim 4, characterized in that: A spring mounting groove (3123) is also provided on the mounting plate (312); the constant force spring (340) is configured as a spring sheet structure, comprising 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).

7. The brush blower motor according to claim 1, characterized in that: The rear cover (200) is provided with a bearing installation groove (230), a groove bottom of the bearing installation groove (230) is provided with a drainage hole (231), a side wall of the bearing installation groove (230) is provided with a drainage groove (232), and the drainage groove (232) is communicated with the drainage hole (231).

8. The brush blower motor according to claim 7, characterized in that: A waterproof wall (233) is provided at the groove top of the bearing installation groove (230), and the waterproof wall (233) is provided between adjacent drainage grooves (232).

9. The brush blower motor according to any one of claims 1 to 8, characterized in that: The brushed blower motor further comprises a front cover (400), wherein the front cover (400) is arranged at one end of the housing (110) away from the rear cover (200), and a plurality of weight-reducing holes (410) are arranged on the front cover (400).

10. A vehicle air conditioning system, characterized in that: It comprises a brush blower motor as described in any one of claims 1-9.

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