A new energy automobile fan motor

Abstract

The utility model relates to a new energy automobile fan motor, including casing, pivot, heat dissipation fan, bearing, automobile fan, clamping device and supporting device, pivot sets up in the casing, heat dissipation fan and bearing cover set on the pivot, and the automobile fan is connected with one end of pivot, clamping device sets up in one side of pivot, and supporting device is set up in the other side of clamping device around pivot mirror image, and the bottom fixed connection of clamping device and supporting device is in casing. Clamping device supports and wear clearance compensation to pivot through gyro wheel, supporting piece and spring cooperation, to reduce the vibration and noise when pivot operation.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts, specifically to a fan motor for new energy vehicles. Background Technology

[0002] In new energy vehicles, the cooling fan is typically driven by an impeller by a motor. The motor shaft is supported by front and rear bearings or bushings and positioned by end covers / center supports. Under conditions of frequent start-stop cycles, humidity, heat, and airflow pulsation, the shaft and mating surfaces are prone to wear, and the clearance gradually increases, resulting in rotor micro-wobbling and gap vibration, which manifests as increased noise, intensified vibration, and shortened lifespan.

[0003] To mitigate these problems, current practices often involve increasing the hardness of parts or using high-grade bearings; adding shims, eccentric sleeves, or screws during assembly for one-time correction. These measures are effective initially, but their effectiveness diminishes as wear intensifies, making it difficult to stably suppress vibrations and noise caused by increased clearance over a long period. Utility Model Content

[0004] This invention aims to solve the problem of vibration and noise caused by increased clearance due to shaft wear in the fan motor of new energy vehicles after long-term use.

[0005] The technical solution of this utility model is as follows: a new energy vehicle fan motor, comprising: a housing; a rotating shaft disposed inside the housing; a cooling fan and a bearing sleeved on the rotating shaft; a car fan connected to one end of the rotating shaft; a clamping device disposed on one side of the rotating shaft; and a supporting device disposed mirror-imagely around the rotating shaft on the other side of the clamping device, wherein the bottom ends of the clamping device and the supporting device are fixedly connected to the housing.

[0006] Furthermore, according to the aforementioned new energy vehicle fan motor, the clamping device and the supporting device are disposed on the side near the bearing.

[0007] Preferably, according to the aforementioned new energy vehicle fan motor, the clamping device includes a housing, a hinge arm, a hinge shaft, and a support member; wherein, the hinge arm is fixed to the housing by the hinge shaft; and a slot is provided inside the housing for limiting the position of the support member.

[0008] Preferably, in some embodiments, according to the aforementioned new energy vehicle fan motor, the support member has an annular groove, and a spring is sleeved on the support member, with one end of the spring abutting against the annular groove and the other end abutting against the outside of the groove.

[0009] Preferably, according to the aforementioned new energy vehicle fan motor, each end of the hinge arm is provided with a first roller, one roller abutting on the rotating shaft, and the other roller abutting on the outside of the annular groove; the support member is provided with a second roller at the end away from the groove, and the second roller abutting on the rotating shaft.

[0010] Furthermore, the diameter of the second roller is larger than the diameter of the first roller.

[0011] Furthermore, the hinge arm is not provided in the support device, and the remaining components correspond to the clamping device, specifically including: a housing; the support member having the annular groove; a spring sleeved on the support member and with one end abutting against the annular groove; and a second roller provided at one end of the support member.

[0012] The beneficial effects of this utility model are as follows: by symmetrically arranging and fixing the clamping and supporting devices on both sides of the rotating shaft, the force is more evenly distributed and the shaft swing is smaller; both are arranged close to the bearing; the hinged arm, roller, annular groove, and spring cooperate to convert the spring thrust into a clamping force on the rotating shaft, automatically adjusting with wear to always maintain a suitable small gap, without tightening or vibrating; the supporting end uses a larger diameter No. 2 roller, with a larger contact area, lower pressure and speed, thus being more wear-resistant, generating less heat, and producing less noise; the groove inside the housing guides and limits the supporting component, preventing excessive tightness or displacement; the hinged arm is removed from the supporting side while retaining the rest of the structure, simplifying parts and assembly. It can stably compensate for and clamp the rotating shaft throughout its entire service life, reducing noise and vibration, extending lifespan, and reducing maintenance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a fan motor for a new energy vehicle provided in an embodiment of this application; Figure 2 This application provides a schematic diagram of the internal structure of a fan motor for a new energy vehicle. Figure 3 A cross-sectional view of a clamping device for a fan motor in a new energy vehicle, provided in an embodiment of this application; Attached icon numbers: 1. Housing; 2. Shaft; 3. Cooling fan; 4. Bearing; 5. Car fan; 6. Clamping device; 7. Support device; 61. Mounting housing; 62. Hinge arm; 63. Hinge shaft; 64. Support component; 65. Spring; 66. Roller No. 1; 67. Roller No. 2; 68. Slot; 69. Annular slot. Detailed Implementation

[0014] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application.

[0015] In new energy vehicles, the cooling fan 3 is typically driven by an impeller by a motor. The motor shaft 2 is supported by front and rear bearings 4 or bushings and positioned by end covers / center frames. Under conditions of long-term start-stop, humidity, heat, and airflow pulsation, the shaft 2 and its mating surfaces are prone to wear, and the clearance gradually increases, resulting in rotor micro-wobbling and gap vibration, which manifests as increased noise, intensified vibration, and shortened lifespan.

[0016] To mitigate the aforementioned problems, current practices often involve increasing the hardness of parts or using high-grade bearings; adding shims, eccentric sleeves, or screws during assembly for one-time correction. These measures are effective initially, but their effectiveness diminishes as wear intensifies, making it difficult to stably suppress vibrations and noise caused by increased clearance over a long period.

[0017] This utility model aims to solve the problem of vibration and noise caused by the increased clearance of the shaft 2 due to wear after long-term use of the fan motor 5 in new energy vehicles.

[0018] The beneficial effects of this utility model are as follows: by symmetrically arranging and fixing the clamping device 6 and the support device 7 on both sides of the rotating shaft 2, the force is more uniform and the shaft swing is smaller; both are arranged close to the bearing 4; the hinge arm, roller, annular groove 69 cooperate with the spring 65 to convert the spring 65 thrust into a clamping force on the rotating shaft 2, which automatically follows the wear and always maintains a suitable small gap, without tightening or trembling; the support member 64 end uses a larger diameter No. 2 roller 67, which has a larger contact area, lower pressure and speed, and is therefore more wear-resistant, generates less heat, and has lower noise; the groove 68 in the housing 1 guides and limits the support member 64 to prevent it from being too tight or shifting; the hinge arm is removed from the support side while the rest of the structure is retained, simplifying the parts and assembly. It can stably compensate for clamping the rotating shaft 2 throughout the entire service life, reducing noise and vibration, extending service life and reducing maintenance.

[0019] This utility model provides a new energy vehicle fan motor, comprising: a housing 1; a rotating shaft 2 disposed inside the housing 1; a cooling fan 3 and a bearing 4 sleeved on the rotating shaft 2; a car fan 5 connected to one end of the rotating shaft 2; a clamping device 6 disposed on one side of the rotating shaft 2; and a support device 7 disposed mirror-imagely around the rotating shaft 2 on the other side of the clamping device 6, wherein the bottom ends of the clamping device 6 and the support device 7 are fixedly connected to the housing 1.

[0020] Combined with appendix Figure 1-3 The housing 1 is a cylindrical or box-shaped component with one open end, housing a stator and bearing 4. The rotating shaft 2 passes through the housing 1 and is supported by the bearing 4. A cooling fan 3 is coaxially fixed to one side of the housing 1 within the rotating shaft 2, guiding airflow within the motor cavity. An automotive fan 5 is fixed to the end of the rotating shaft 2 extending out of the housing 1, supplying air to the vehicle's radiator or condenser. To ensure the stability and minimal runout of the rotating shaft 2 during operation, a set of clamping devices 6 and a set of supporting devices 7 are arranged radially along both sides of the rotating shaft 2. These devices are mirror images of the axis of the rotating shaft 2, and their respective bottom ends are fixed to the mounting surface of the housing 1 with screws, studs, or other reliable fasteners, thus forming a symmetrical constraint path between the housing 1 and the rotating shaft 2.

[0021] It is understood that the clamping device 6 refers to the mechanism component used to apply controllable radial restriction and compensation to the rotating shaft 2, which can take the form of roller contact, slipper contact or low-friction lining contact, etc.

[0022] A corresponding support device 7 is provided to provide support or limit on the opposite side, ensuring that the forces on both sides are basically balanced. During assembly, the rotating shaft 2 and bearing 4 are first positioned inside the housing 1. Then, the cooling fan 3 and the automotive fan 5 are fixed to the rotating shaft 2 in sequence. Next, the clamping device 6 and the support device 7 are fixed to the housing 1 according to the positioning holes, and their contact state with the rotating shaft 2 is adjusted so that the rotating shaft 2 maintains a small and uniform radial gap or light contact under static conditions. During operation, the aerodynamic force generated by the automotive fan 5 and the radial load caused by rotor imbalance are shared by the two devices and pass through the closed force flow of the housing 1. The clamping device 6 restricts the vibration of the rotating shaft 2, and the support device 7 provides an equivalent reaction force and support on the opposite side. The two work together to suppress the gap vibration and noise caused by wear or assembly deviation.

[0023] In some embodiments, the clamping device 6 and the supporting device 7 are disposed on the side closer to the bearing 4. It can be understood that the side closer to the bearing 4 refers to the side where the contact points between the two devices and the bearing 2 are small relative to the outer ring end face of the bearing 4 along the axial direction of the shaft 2. The two devices are fixed by reinforcing steps or screw holes on the housing 1, and after installation, their contact points with the shaft 2 are located not far from the outer side of the bearing 4. During operation, the lateral force generated by the impeller imbalance and airflow on the shaft 2 is preferentially shared by these two devices and transmitted to the housing 1, effectively shortening the suspended section on the outer side of the bearing 4, thus reducing the amplitude of shaft vibration and tremor. Due to the shortened lever arm, less clamping force is required to achieve the same limiting effect, resulting in reduced contact pressure, less wear and heat generation, and lower operating noise.

[0024] In some embodiments, the clamping device 6 includes a mounting housing 61, a hinge arm, a hinge shaft 63, and a support member 64; wherein the hinge arm is fixed to the mounting housing 61 by the hinge shaft 63; and a slot 68 is provided inside the housing 61 for limiting the position of the support member 64.

[0025] Specifically, the clamping device 6 consists of a mounting housing 61, a hinge arm, a hinge shaft 63, and a support member 64. The mounting housing 61 is fixed on the mounting surface inside the motor housing 1, and one side of it is made into two lugs to accommodate the hinge shaft 63. The hinge arm is hinged to the mounting housing 61 with the hinge shaft 63 as the rotation center. The support member 64 is arranged in the internal guide area of ​​the mounting housing 61. The mounting housing 61 has a slot 68 that mates with the support member 64. The opening of the slot 68 faces the rotating shaft 2. The length and width limit the stroke and posture of the support member 64, respectively, so that the support member 64 can only move in a predetermined direction and does not tilt.

[0026] The mounting housing 61 is used to support and position the entire clamping mechanism; the hinge arm is a rotatable clamping member near the rotating shaft 2, used to convert external adjustment force into clamping force towards the rotating shaft 2; the hinge shaft 63 is a rotating connection between the hinge arm and the mounting housing 61, ensuring smooth movement and repeatable positioning of the hinge arm; the support member 64 is a supporting structure opposite to the rotating shaft 2, and its end can be provided with a contact surface that matches the rotating shaft 2 to reduce wear and maintain stable contact. During assembly, the support member 64 is first inserted into the slot 68 and allowed to slide freely within the slot 68 to its initial position. Then, the hinge arm is mounted onto the mounting housing 61 via the hinge shaft 63, ensuring that the pressing end of the hinge arm is adjacent to the rotating shaft 2. During use, the hinge arm is gently pushed or rotated by external force, causing it to press the rotating shaft 2 against the support member 64. Under the guidance and limiting action of the slot 68, the support member 64 provides reliable reaction force and stop, forming a stable clamping of the rotating shaft 2. When slight wear occurs on the rotating shaft 2 or the contact surface, the support member 64 can automatically or with minor adjustments reposition itself within the allowable stroke of the slot 68, maintaining the clamping relationship. This structure is simple, with a clear force path. The limiting action of the slot 68 ensures that the support member 64 does not shift, and the rotation of the hinge arm around the hinge shaft 63 makes the clamping action repeatable and easily adjustable. Without increasing additional space, it helps reduce the sway and noise of the rotating shaft 2 and improves assembly consistency and durability.

[0027] In some embodiments, the support member 64 is provided with an annular groove 69, and a spring 65 is sleeved on the support member 64. One end of the spring 65 abuts against the annular groove 69, and the other end abuts against the outside of the groove 68.

[0028] Specifically, a ring-shaped groove 69 is machined on the support member 64, serving as a positioning shoulder for the spring 65. A compression spring 65 is coaxially fitted on the outside of the support member 64. The inner end face of the spring 65 rests on the step of the ring-shaped groove 69, and the outer end face abuts against the outer wall of the groove 68 or its step surface inside the mounting housing 61. Preload is applied to the spring 65 during assembly. During operation, the preloaded spring 65 continuously pushes the support member 64 towards the rotating shaft 2 along the guide direction of the groove 68, keeping the support member 64 in light contact with the rotating shaft 2. When wear occurs on the rotating shaft 2 or the contact surface, causing the gap to increase, the spring 65 automatically pushes the support member 64 forward to fill the gap, eliminating the need for manual readjustment. Fitted on the support member 64, the spring 65 is prevented from shifting or slipping, thus providing suitable support force stably over a long period without changing the overall arrangement.

[0029] In some embodiments, each end of the hinge arm is provided with a first roller 66, one end of which abuts against the rotating shaft 2, and the other end of which abuts against the outside of the annular groove 69; a second roller 67 is provided on the end of the support member 64 away from the groove 68, and the second roller 67 abuts against the rotating shaft 2.

[0030] It is understood that rollers 66 are installed at both ends of the articulated arm. One roller 66 contacts the rotating shaft 2, while the other roller 66 contacts the outer side of the annular groove 69 on the support member 64. This arrangement allows the articulated arm to transmit force evenly to the support member 64 and maintain stable contact when subjected to external force through the rollers 66. A second roller 67 is provided at the end of the support member 64 away from the groove 68. The second roller 67 contacts the rotating shaft 2 and provides auxiliary support. Due to the size and position design of the second roller 67, it bears the main force of the rotating shaft 2 and ensures that the rotating shaft 2 maintains a stable stress state during operation, thereby avoiding shaft 2 misalignment or abnormal wear caused by excessive or uneven friction. The overall structure, through the cooperation of the rollers, effectively reduces friction and wear, improves assembly accuracy and durability, and reduces noise and vibration during operation.

[0031] In some embodiments, the diameter of the second roller 67 is larger than the diameter of the first roller 66.

[0032] Specifically, the increased diameter of the second roller 67 increases the contact area with the shaft 2, thereby reducing the unit contact stress, mitigating wear between the shaft 2 and the roller, and extending the roller's service life. Secondly, the larger second roller 67 provides greater stability and support to the support member 64, effectively preventing excessive displacement or tilting of the shaft 2 during operation and maintaining its smooth operation. Furthermore, the larger diameter reduces the rotational speed of the second roller 67, thereby reducing heat and noise generated by friction, further improving the motor's operating efficiency and comfort. This design allows for more even and stable force distribution on the shaft 2 during operation, reducing wear and noise after long-term use, and enhancing the reliability and durability of the fan motor.

[0033] In some embodiments, the support device 7 does not have a hinge arm, and the remaining components correspond to the clamping device 6, specifically including: a mounting housing 61; a support member 64 with an annular groove 69; a spring 65 sleeved on the support member 64 and with one end abutting against the annular groove 69; and a second roller 67 disposed at one end of the support member 64.

[0034] Specifically, the support device 7 does not have a hinged arm, and its remaining structure corresponds to that of the clamping device 6. The support device 7 includes a mounting housing 61, a support member 64 with an annular groove 69, a spring 65 sleeved on the outside of the support member 64, and a second roller 67 located at one end of the support member 64. The mounting housing 61 is fixed to the mounting surface of the motor housing 1, and the support member 64 works together with the spring 65 through the annular groove 69. One end of the spring 65 abuts against the annular groove 69, and the other end contacts the outside of the groove 68 inside the housing 1, thereby applying appropriate preload to maintain the stable position of the support member 64 and prevent it from sliding or excessively deforming. The second roller 67 is located at one end of the support member 64. The second roller 67 contacts the rotating shaft 2, providing support and guidance for the rotating shaft 2, ensuring that the rotating shaft 2 remains in the predetermined position during operation. This design eliminates the hinge arm, simplifying the structure. Simultaneously, the cooperation of spring 65 and slot 68 ensures that the support 64 can automatically adjust, compensating for gaps caused by wear and providing continuous clamping force. This support device 7 effectively improves assembly accuracy and durability, reduces noise and vibration, and provides stable and reliable support throughout the entire motor operating cycle.

[0035] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A fan motor for a new energy vehicle, characterized in that, include: Shell (1); A rotating shaft (2) is disposed inside the housing (1); A cooling fan (3) and a bearing (4) are mounted on the rotating shaft (2); The car fan (5) is connected to one end of the rotating shaft (2); A clamping device (6) is provided on one side of the rotating shaft (2); A support device (7) is mirror-arranged on the other side of the clamping device (6) around the pivot (2), wherein the bottom ends of the clamping device (6) and the support device (7) are fixedly connected to the housing (1).

2. A new energy vehicle fan motor according to claim 1, characterized in that, The clamping device (6) and the supporting device (7) are located on the side near the bearing (4).

3. A new energy vehicle fan motor according to claim 2, characterized in that, The clamping device (6) includes a mounting housing (61), a hinge arm, a hinge shaft (63), and a support member (64); wherein the hinge arm is fixed on the mounting housing (61) by the hinge shaft (63); a slot (68) is provided inside the housing (1) for limiting the support member (64).

4. A new energy vehicle fan motor according to claim 3, characterized in that, The support member (64) has an annular groove (69) and a spring (65) is sleeved on the support member (64). One end of the spring (65) abuts against the annular groove (69) and the other end abuts against the outside of the groove (68).

5. A new energy vehicle fan motor according to claim 4, characterized in that, Each end of the hinge arm is provided with a first roller (66), one end of which abuts against the rotating shaft (2), and the other end of which abuts against the outside of the annular groove (69); the support member (64) is provided with a second roller (67) at the end away from the groove (68), and the second roller (67) abuts against the rotating shaft (2).

6. A new energy vehicle fan motor according to claim 5, characterized in that, The diameter of the second roller (67) is larger than the diameter of the first roller (66).

7. A new energy vehicle fan motor according to claim 6, characterized in that, The hinge arm is not provided in the support device (7), and the other components correspond to the clamping device (6), specifically including: mounting housing (61); support member (64) having the annular groove (69); spring (65) sleeved on the support member (64) and one end abutting the annular groove (69); and second roller (67) provided at one end of the support member (64).

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