Buffering vibration isolation structure of brushless blower motor

Abstract

The invention relates to the field of centrifugal fans, in particular to a buffer vibration isolation structure of a brushless blower motor, which comprises a brushless motor composed of a stator and a rotor assembly, and the stator is matched with the rotor assembly; the stator and the rotor assembly are arranged on the bearing seat, and one end, deviating from the rotor assembly, of the bearing seat is provided with an insertion part; the buffer block is matched with the insertion end; the center of the heat dissipation plate is provided with a connecting boss, the side, away from the heat dissipation plate, of the connecting boss is provided with a first mounting groove, the side, away from the connecting boss, of the heat dissipation plate is provided with a second mounting groove, the second mounting groove communicates with the first mounting groove, and the end, away from the insertion end, of the buffer block penetrates through the first mounting groove; and the second mounting groove is arranged in the third mounting groove. According to the invention, the advantages of heat dissipation performance and buffering vibration isolation can be realized by effectively utilizing the structural configuration of the device.

Description

Technical Field

[0001] The present application relates to the field of centrifugal fans, and more specifically to a buffering and vibration isolation structure of a brushless blower motor. Background Art

[0002] The brushless blower of automobile air conditioner mainly includes three parts: first, the brushless motor, which provides rotational power; second, the impeller, or centrifugal fan wheel, which is assembled on the shaft of the brushless motor and rotates to generate airflow; third, the flange, which covers the brushless motor and is equivalent to the outer shell of the brushless motor, and has a matching structure connected to the automobile air-conditioning system, which is used to install the blower in the air-conditioning system.

[0003] The brushless motor part is mainly composed of a stator, a rotor, a bearing seat supporting them, and a controller. The controller will generate a lot of heat during the operation of the fan, so it must be attached to an aluminum support seat with good thermal conductivity to conduct the heat to the aluminum seat and reduce the temperature rise by increasing the heat dissipation area.

[0004] Due to production, process and assembly reasons, the blower will inevitably vibrate during operation. If a decoupling buffer structure with the flange is not provided, the vibration will be transmitted to the installation point of the blower in the automobile air conditioning system. Since the air conditioning flow channel is a thin-walled cavity structure, these vibrations will produce unbearable noise, and even cause damage and failure of the air conditioning system due to resonance. Therefore, a structure that can take into account both heat dissipation performance and buffer vibration isolation is needed. Summary of the invention

[0005] The main purpose of the present application is to provide a buffer vibration isolation structure for a brushless blower motor, wherein the buffer vibration isolation structure of the brushless blower motor can effectively utilize its own structural configuration to achieve the advantages of both heat dissipation performance and buffer vibration isolation.

[0006] Another purpose of the present application is to provide a buffer vibration isolation structure for a brushless blower motor, wherein the buffer vibration isolation structure mainly comprises a bearing seat, a buffer rubber ring (buffer block), a heat sink, a pressure plate and screws. This structure can decouple the brushless motor inside the automobile blower from the heat sink, prevent the vibration of the blower from being transmitted to the volute of the automobile air conditioning system through the heat sink and flange, and play a role in buffer vibration isolation. The use of this buffer structure reduces the volume of the heat dissipation cast aluminum plate and reduces the cost while ensuring a certain heat dissipation capacity.

[0007] Another object of the present application is to provide a buffering and vibration isolation structure for a brushless blower motor, wherein the buffering and vibration isolation structure of the brushless blower motor is simple in structure and easy to operate, does not involve complicated manufacturing processes and expensive materials, has high economy, and is easy to promote and use.

[0008] In order to achieve at least one of the above-mentioned invention purposes, the present application provides a buffer vibration isolation structure of a brushless blower motor, wherein the buffer vibration isolation structure of the brushless blower motor comprises: A brushless motor, the brushless motor is composed of a stator and a rotor assembly, the stator and the rotor assembly are matched; a bearing seat, the stator and rotor assembly are arranged on the bearing seat, and the end of the bearing seat away from the rotor assembly has an insertion portion; a buffer block, the buffer block cooperates with the insertion end; and A heat sink, wherein the center of the heat sink has a connecting boss, the side of the connecting boss facing away from the heat sink has a first mounting groove, and the side of the heat sink facing away from the connecting boss has a second mounting groove, the second mounting groove is connected to the first mounting groove, and the end of the buffer block facing away from the insertion end passes through the first mounting groove and is placed in the third mounting groove.

[0009] In one or more embodiments of the present application, the bearing seat has a mating cavity, both ends of which are connected to the outside, and the wall surface forming the mating cavity has a plurality of evenly distributed strip-shaped protrusions, and two bearings are also arranged in the mating cavity, and the two bearings are respectively located on both sides of the plurality of strip-shaped protrusions.

[0010] In one or more embodiments of the present application, the buffer block cooperates with the insertion end. Specifically, the annular block has a resting end, a first extension end and a second extension end, the two ends of the first extension end are respectively connected to the resting end and the second extension end, and the transverse cross-sectional dimension of the resting end is larger than the transverse cross-sectional dimension of the first extension end, and the transverse cross-sectional dimension of the resting end is smaller than the transverse cross-sectional dimension of the second extension end.

[0011] In one or more embodiments of the present application, the size of the second mounting groove is larger than that of the first mounting groove, and the buffer block is a rubber member, the abutting end can pass through the first mounting groove by being deformed under pressure and abut against the connecting boss, and at the same time, the first extension end is located in the first mounting groove, the second extension end is placed in the second mounting groove, and the side of the second extension end close to the first extension end abuts against the bottom wall forming the second mounting groove, and the heat sink is a cast aluminum heat sink.

[0012] In one or more embodiments of the present application, the annular block is provided with a third mounting groove on one side of the abutting end, the annular block is provided with a fourth mounting groove on one side of the second extending end, the third mounting groove is connected to the fourth mounting groove, and the insertion portion of the bearing seat is placed in the third mounting groove.

[0013] In one or more embodiments of the present application, the end of the insertion portion placed in the third mounting groove has a plurality of positioning holes, and the buffering and vibration isolation structure of the brushless blower motor also includes a pressure plate, which is arranged in the fourth mounting groove and fixedly connected to the end of the insertion portion placed in the third mounting groove.

[0014] In one or more embodiments of the present application, the stator has a plurality of evenly distributed terminals on one side close to the bearing seat, and the bearing seat has a protrusion on one side, wherein the protrusion is an annular protrusion, and the protrusion is located on the upper side of the insertion portion, and the side of the protrusion close to the insertion portion also contacts the top of the abutment end of the buffer block.

[0015] In one or more embodiments of the present application, the protrusion has a first insertion groove, which is also connected to the third mounting groove, and the upper and lower sides of the pressure plate each have a glue filling groove, the two glue filling grooves correspond one to one, and there are a plurality of evenly distributed second insertion grooves between the two glue filling grooves, and the two ends of the plurality of second insertion grooves are respectively connected to the two glue filling grooves, wherein the ends of the plurality of terminals facing away from the stator pass through the first insertion groove, the third mounting groove, the glue filling groove on the upper side, the third mounting groove, and the glue filling groove on the lower side in sequence, and are placed at the bottom of the heat sink.

[0016] In one or more embodiments of the present application, sealing rubber is provided in both of the glue filling grooves, and thermal grease is also applied to the bottom of the heat sink, and one side of the heat sink coated with thermal grease is also fixedly matched with the external circuit board, and the ends of multiple terminals also pass through the external circuit board and are welded and fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] These and / or other aspects and advantages of the present application will become clearer and easier to understand from the following detailed description of the embodiments of the present application in conjunction with the accompanying drawings, in which: Figure 1 The diagram shows a schematic diagram of a buffer vibration isolation structure of a brushless blower motor. Figure 1 .

[0018] Figure 2 The diagram shows a schematic diagram of a buffer vibration isolation structure of a brushless blower motor. Figure 2 .

[0019] Figure 3 The figure shows an axial cross-sectional view of a buffer vibration isolation structure of a brushless blower motor.

[0020] Figure 4 The figure shows a partial structure diagram of a buffer vibration isolation structure of a brushless blower motor Figure 1 .

[0021] Figure 5 The figure shows a partial structure diagram of a buffer vibration isolation structure of a brushless blower motor Figure 2 .

[0022] Figure 6 The figure shows a partial structure diagram of a buffer vibration isolation structure of a brushless blower motor Figure 3 .

[0023] Figure 7 The figure shows a schematic structural diagram of the bearing seat.

[0024] Figure 8 The figure shows a schematic structural diagram of the pressure plate.

[0025] Fig. 9 The diagram shows the structure of the buffer block. Figure 1 .

[0026] Fig.10 The diagram shows the structure of the buffer block. Figure 2 .

[0027] Fig.11 The diagram shows the structure of the heat sink. Figure 1 .

[0028] Fig.12 The diagram shows the structure of the heat sink. Figure 2 . DETAILED DESCRIPTION

[0029] The terms and words used in the following specification and claims are not limited to the literal meanings, but are merely used by the inventor to enable a clear and consistent understanding of the present application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of the present application is provided for illustrative purposes only and not for the purpose of limiting the present application as defined by the appended claims and their equivalents.

[0030] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0031] Although ordinals such as "first," "second," and the like will be used to describe various components, those components are not limited herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and likewise, a second component may be referred to as a first component without departing from the teachings of the inventive concept. The term "and / or" as used herein includes any and all combinations of one or more associated listed items.

[0032] The terms used herein are only used for the purpose of describing various embodiments and are not intended to be limiting. As used herein, singular forms are intended to also include plural forms, unless the context clearly indicates an exception. In addition, it will be understood that the terms "including" and / or "having" when used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.

[0033] refer to Figures 1 to 12 According to a preferred embodiment of the present invention, a buffer vibration isolation structure of a brushless blower motor, it should be noted that the structure of the buffer vibration isolation structure of the brushless blower motor is as follows Figure 1 As shown, it includes a brushless motor, the structure of the brushless motor is as follows Figure 1 As shown, it includes a stator 100 and a rotor assembly 200, and the stator 100 cooperates with the rotor assembly 200. Specifically, the stator 100 and the rotor assembly 200 are conventional structures.

[0034] Specifically, the buffer vibration isolation structure of the brushless blower motor further includes a bearing seat 10, and the stator 100 and the rotor assembly 200 are arranged on the bearing seat 10. Specifically, the bearing seat 10 is as follows: Figure 7 As shown, it has a matching cavity 101, both ends of which are connected to the outside, and the wall surface forming the matching cavity 101 has a plurality of uniformly distributed strip-shaped protrusions 13, and two bearings 300 are also provided in the matching cavity 101, and the two bearings 300 are respectively located on both sides of the plurality of strip-shaped protrusions 13. It is worth mentioning that the strip-shaped protrusions 13 are used to limit the position of the bearings placed in the matching cavity 101, and it should be noted that the rotor assembly 200 has a shaft, one end of which is placed in the matching cavity 101 and matched with the two bearings 300, and the bearing seat 10 is implemented as a plastic part, and the stator 100, the rotor assembly 200 and the bearing seat 10 constitute the brushless motor as a whole.

[0035] It is worth mentioning that the bottom of the bearing seat 10, which is an end away from the rotor assembly 200, has an insertion portion 11, and the buffer vibration isolation structure of the brushless blower motor also includes a buffer block 20, and the buffer block 20 cooperates with the insertion end. Specifically, the annular block has a resting end 21, a first extension end 22 and a second extension end 23, and the two ends of the first extension end 22 are respectively connected to the resting end 21 and the second extension end 23. Specifically, the transverse cross-sectional dimension of the resting end 21 is larger than the transverse cross-sectional dimension of the first extension end 22, and the transverse cross-sectional dimension of the resting end 21 is smaller than the transverse cross-sectional dimension of the second extension end 23.

[0036] Specifically, the buffer vibration isolation structure of the brushless blower motor further includes a heat sink 30, the center of the heat sink 30 has a connecting boss 31, the side of the connecting boss 31 away from the heat sink 30 has a first mounting groove 3101, the structure of the first mounting groove 3101 is as shown in FIG. Fig.11 As shown, the heat sink 30 has a second mounting groove 3102 on the side facing away from the connecting boss 31, the second mounting groove 3102 is connected to the first mounting groove 3101, and the size of the second mounting groove 3102 is larger than the size of the first mounting groove 3101. It should be noted that the buffer block 20 is installed from the second mounting groove 3102, and the annular block is implemented as a rubber part, that is, the abutting end 21 can pass through the first mounting groove 3101 by compression deformation and abut on the connecting boss 31, while the first extension end 22 is located in the first mounting groove 3101, the second extension end 23 is placed in the second mounting groove 3102, and the side of the second extension end 23 close to the first extension end 22 abuts on the bottom wall forming the second mounting groove 3102. It should also be noted that the heat sink 30 is a cast aluminum heat sink 30.

[0037] It should be noted that the side of the annular block provided with the abutting end 21 has a third mounting groove 201, the side of the annular block provided with the second extending end 23 has a fourth mounting groove 202, the third mounting groove 201 is connected with the fourth mounting groove 202, and it is worth mentioning that the above-mentioned brushless motor is inserted as a whole from the top of the buffer block, that is, the insertion portion 11 of the bearing seat 10 is placed in the third mounting groove 201. It is worth mentioning that the end of the insertion portion 11 placed in the third mounting groove 201 has a plurality of positioning holes 1101, and the buffer vibration isolation structure of the brushless blower motor also includes a pressure plate 40, the pressure plate 40 is arranged in the fourth mounting groove 202, and is fixedly connected to the end of the insertion portion 11 placed in the third mounting groove 201, and the connection method is as follows. Figure 6 As shown, the cover plate is fixed to the end of the insertion portion 11 by at least two screws.

[0038] Among them Figure 3As shown, the stator 100 has a plurality of evenly distributed terminals 1001 on one side close to the bearing seat 10, and the bearing seat 10 has a protrusion 12 on one side, the protrusion 12 is an annular protrusion 12, the protrusion 12 is located on the upper side of the insertion portion 11, and the protrusion 12 is close to the insertion portion 11. The side of the protrusion 12 is also in contact with the top of the abutment end 21 of the buffer block 20. It is worth mentioning that the protrusion 12 has a first insertion groove 1201, and the first insertion groove 1201 is also connected to the third installation groove 201, and the pressure plate The upper and lower sides of the stator 40 are provided with a glue-filling groove 401, the two glue-filling grooves 401 correspond to each other, and a plurality of evenly distributed second insertion grooves 402 are provided between the two glue-filling grooves 401, and the two ends of the plurality of second insertion grooves 402 are respectively connected with the two glue-filling grooves 401, wherein the ends of the plurality of terminals 1001 away from the stator 100 sequentially pass through the first insertion groove 1201, the third installation groove 201, the glue-filling groove 401 located on the upper side, the third installation groove 201, and the glue-filling groove 401 located on the lower side, and are placed at the bottom of the heat sink 30. Specifically, sealing rubber 400 is provided in the two glue-filling grooves 401, and thermal conductive silicone grease is also applied to the bottom of the heat sink 30, and one side of the heat sink 30 coated with thermal conductive silicone grease is also fixedly matched with the external circuit board, specifically connected by screws, and the ends of the plurality of terminals 1001 also pass through the external circuit board 500 and are fixed by welding. After the above-mentioned whole machine is installed, it is placed in a flange plate (not shown in the figure) as a whole, and covered with a circuit cover plate (not shown in the figure).

[0039] It should be noted that the above-mentioned overall structure is to separate the bearing seat 10 from the heat sink 30, and arrange the buffer block 20 in the middle to achieve complete isolation and decoupling. The blower fixes the pressure plate 40 on the bearing seat 10 by screws, and is squeezed by rubber in all directions. The movement of the bearing seat 10 in the up and down direction (X axis) is limited by the rubber (buffer block 20) ​​squeezed by the lower bottom surface of the flange (insertion part 11) of the bearing seat 10 and the upper surface of the pressure plate 40. The movement of the bearing seat 10 in the left and right, front and back directions (Y, Z axes) and the rotational movement around the X, Y axes are limited by the rubber (buffer block 20) ​​squeezed by the cylindrical surface of the lower part of the bearing seat 10 (insertion part 11) and the cylindrical surface of the pressure plate 40. The rotational movement of the bearing seat 10 around the Z axis is limited by the three cylindrical protrusions (with positioning holes 1101) at the lower part of the bearing seat 10 and the three cylindrical recessed holes of the heat sink 30, which are also A rubber ring (buffer block 20) ​​plays a buffering role, and its advantage is that the buffer vibration isolation structure is arranged between the bearing seat 10 and the heat sink 30, rather than arranging the buffer structure between the heat sink 30 and the flange, which can reduce the diameter and volume of the heat sink 30, thereby reducing the diameter of the flange, so that the blower can be made smaller. 2. The bearing seat 10 is separated from the heat sink 30, instead of being cast in one piece. Plastic material can be used for the bearing seat 10. The original aluminum material of the bearing seat 10 does not increase the heat dissipation capacity much, and reduces the finishing process costs of some assembly surfaces of the cast aluminum seat (the plastic bearing seat 10 does not require other treatment after molding), which reduces costs while having little impact on the heat dissipation effect. 3. The number of overall parts is reduced, and the number of the original 3 or 4 buffer blocks 20 is reduced to one, which can be assembled in place at one time. 4. At the same time, the insulation and sealing solution of the motor is taken into consideration. The three power terminals 1001 of the brushless motor need to maintain a certain insulation strength when passing through the heat sink 30 to reach the circuit control board below, and keep the seal to prevent air leakage. The insulation and sealing can be achieved by rubberizing the pressure plate 40 and cooperating with the buffer rubber ring, without the need for additional insulation and sealing parts.

[0040] In summary, the buffering and vibration isolation structure of the brushless blower motor based on the embodiment of the present application is explained, which provides the buffering and vibration isolation structure of the brushless blower motor with advantages such as being able to take into account both heat dissipation performance and buffering and vibration isolation.

[0041] It is worth mentioning that in the embodiment of the present application, the buffer vibration isolation structure of the brushless blower motor is simple in structure, does not involve complex manufacturing processes and expensive materials, and has high economic efficiency. At the same time, for manufacturers, the buffer vibration isolation structure of the brushless blower motor provided by the present application is easy to produce and has low cost, which is more conducive to controlling production costs and further conducive to product promotion and use.

[0042] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A buffer vibration isolation structure for a brushless blower motor, characterized in that: The buffer vibration isolation structure of the brushless blower motor comprises: A brushless motor, the brushless motor is composed of a stator and a rotor assembly, the stator and the rotor assembly are matched; A bearing seat, the stator and rotor assembly are arranged on the bearing seat, and the end of the bearing seat away from the rotor assembly has an insertion portion; a buffer block, the buffer block cooperates with the insertion end; and A heat sink, wherein the center of the heat sink has a connecting boss, the side of the connecting boss facing away from the heat sink has a first mounting groove, and the side of the heat sink facing away from the connecting boss has a second mounting groove, the second mounting groove is connected to the first mounting groove, and the end of the buffer block facing away from the insertion end passes through the first mounting groove and is placed in the third mounting groove.

2. The buffering and vibration isolation structure of the brushless blower motor according to claim 1, wherein the bearing seat has a matching cavity, both ends of the matching cavity are connected to the outside, and the wall surface forming the matching cavity has a plurality of evenly distributed strip-shaped protrusions, and two bearings are also arranged in the matching cavity, and the two bearings are respectively located on both sides of the plurality of strip-shaped protrusions.

3. The buffering and vibration isolation structure of the brushless blower motor according to claim 2, wherein the buffer block cooperates with the insertion end, and the annular block has a resting end, a first extension end and a second extension end, the two ends of the first extension end are respectively connected to the resting end and the second extension end, and the transverse cross-sectional dimension of the resting end is larger than the transverse cross-sectional dimension of the first extension end, and the transverse cross-sectional dimension of the resting end is smaller than the transverse cross-sectional dimension of the second extension end.

4. The buffering and vibration isolation structure of the brushless blower motor according to claim 3, wherein the size of the second mounting groove is larger than that of the first mounting groove, and the buffer block is a rubber part, the abutting end can pass through the first mounting groove by being compressed and deformed, and abut against the connecting boss, and at the same time, the first extension end is located in the first mounting groove, the second extension end is placed in the second mounting groove, and the side of the second extension end close to the first extension end abuts against the bottom wall forming the second mounting groove, and the heat sink is a cast aluminum heat sink.

5. The buffering and vibration isolation structure of the brushless blower motor according to claim 4, wherein the annular block is provided with a third mounting groove on one side of the abutting end, the annular block is provided with a fourth mounting groove on one side of the second extending end, the third mounting groove is connected to the fourth mounting groove, and the insertion portion of the bearing seat is placed in the third mounting groove.

6. The buffering and vibration isolation structure of a brushless blower motor according to claim 5, wherein the end of the insertion part disposed in the third mounting groove has a plurality of positioning holes, and the buffering and vibration isolation structure of the brushless blower motor also includes a pressure plate, which is arranged in the fourth mounting groove and fixedly connected to the end of the insertion part disposed in the third mounting groove.

7. The buffering and vibration isolation structure of the brushless blower motor according to claim 6, wherein the side of the stator close to the bearing seat also has a plurality of evenly distributed terminals, and the side of the bearing seat also has a protrusion, the protrusion is an annular protrusion, the protrusion is located on the upper side of the insertion part, and the side of the protrusion close to the insertion part also contacts with the top of the abutting end of the buffer block.

8. The buffering and vibration isolation structure of a brushless blower motor according to claim 7, wherein the protrusion has a first insertion groove, the first insertion groove is also connected to the third mounting groove, and the upper and lower sides of the pressure plate each have a glue filling groove, the two glue filling grooves correspond one to one, and there are a plurality of evenly distributed second insertion grooves between the two glue filling grooves, the two ends of the plurality of second insertion grooves are respectively connected to the two glue filling grooves, wherein the ends of the plurality of terminals facing away from the stator pass through the first insertion groove, the third mounting groove, the glue filling groove on the upper side, the third mounting groove, the glue filling groove on the lower side in sequence, and are placed at the bottom of the heat sink.

9. According to the buffering and vibration isolation structure of the brushless blower motor as described in claim 8, sealing rubber is arranged in both of the glue filling grooves, and thermal grease is also coated on the bottom of the heat sink, and one side of the heat sink coated with thermal grease is also fixedly matched with the external circuit board, and the ends of multiple terminals also pass through the external circuit board and are welded and fixed.

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