Double-layer vibration reduction blower assembly

Abstract

The invention discloses a double-layer vibration-reducing blower assembly, including a blower motor, the blower motor having a double-headed motor shaft, a wind wheel fixedly mounted on the double-headed motor shaft, and characterized in that the blower motor is mounted in two layers of inner and outer plastic shells, the inner plastic shell embraces the outer circle of the blower motor, an inner vibration-reducing structure is arranged between the two, and the outer plastic shell embraces the inner plastic shell, an outer vibration-reducing structure is arranged between the two. The invention has the characteristics of low noise and good vibration-reducing effect, and is easy to install and disassemble.

Description

Technical Field

[0001] The invention relates to an automobile blower assembly. Background Art

[0002] The automobile blower assembly is mainly used in automobile air conditioning systems. Its function is to blow the cold air from the air conditioning evaporator or the hot air from the water heater into the car. At present, the main disadvantage of the automobile blower assembly is that it is difficult to control noise and vibration, which in turn has a negative impact on the automobile air conditioning system; at the same time, for the blower with double impellers, it is not convenient to install and remove it from the installation position in the car. Summary of the invention

[0003] In view of the deficiencies in the prior art, the object of the present invention is to provide a double-layer vibration-damping blower assembly which has the characteristics of low noise, good vibration-damping effect, and is easy to install and disassemble.

[0004] The present invention is accomplished by taking the following technical solutions:

[0005] A double-layer vibration-damping blower assembly includes a blower motor, the blower motor has a double-headed motor shaft, and a wind wheel is fixedly installed on the double-headed motor shaft. The characteristics are: the blower motor is installed in two layers of inner and outer plastic shells, the inner plastic shell embraces the outer circle of the blower motor, and an inner vibration-damping structure is provided between the two, and the outer plastic shell embraces the inner plastic shell, and an outer vibration-damping structure is provided between the two.

[0006] In the blower assembly of the above technical solution, the motor is supported by two layers of inner and outer plastic shells. Due to the inner and outer vibration-damping structure, the vibration generated when the motor is running can be effectively avoided, thereby minimizing the impact of the operation of the blower assembly on the air-conditioning system; at the same time, the inner and outer layers of the plastic shell are both split into upper and lower halves, and the space between the two layers can be reasonably designed, so that when the blower is running, the wind flows more smoothly, which has a better cooling effect on the heat generated when the blower motor is running.

[0007] Preferably, the inner layer vibration reduction structure and the outer layer vibration reduction structure are formed by secondary injection molding of elastic body on the inner and outer surfaces of the inner layer plastic shell. The inner layer plastic shell adopts the upper and lower halves split type, the upper and lower halves are connected by buckle connection, the upper and lower halves are provided with left and right lugs on the joint surface, the lugs are provided with hanging ear holes, a rubber sleeve is secondary injection molded in the hanging ear holes, a positioning hole is provided in the middle of the rubber sleeve, the upper and lower halves are provided with a plurality of rubber strips along their outer surfaces, the rubber strips are integrally molded during the secondary injection molding of the rubber sleeve, and the upper and lower halves are provided with a plurality of rubber blocks on their inner surfaces; the outer layer plastic shell adopts the upper and lower half ring split type, the upper and lower half rings are connected by screw fastening, the upper half ring is provided with a positioning rod at the position corresponding to the positioning hole, the positioning rod is inserted into the positioning hole, the lower half ring is provided with a screw hole at the position corresponding to the positioning hole, the screw passes through the screw hole from bottom to top and is tightened and fixed in the center rod hole provided with the positioning rod.

[0008] The above design can ensure that the inner and outer plastic shells are positioned and fixed under the premise of complete elastic contact, thereby realizing double-layer vibration-damping support of the motor by the inner and outer plastic shells with simple process and reasonable structure, thereby minimizing the impact of the blower assembly operation on the air-conditioning system.

[0009] Preferably, the blower motor has a carbon brush and a brush holder, the carbon brush is movably arranged on the brush holder, two carbon brushes are staggered 180 degrees and arranged around the motor commutator installed on the motor shaft, and the installation center of the carbon brush is offset from the center of the motor commutator. In the above design, since the installation center of the carbon brush is offset from the center of the motor commutator, the motor commutator will generate a lateral thrust on the carbon brush when the motor is running, so that the carbon brush will not shake left and right during operation, thereby reducing the motor noise.

[0010] Preferably, the wind wheel is provided with a tool insertion hole on the end surface, and correspondingly, the end surface of the plastic shell is provided with a tool positioning hole. Through the above design, when the blower assembly is installed and disassembled at the in-vehicle installation position, the rod of the disassembly tool can be simultaneously inserted into the tool insertion hole of the wind wheel and the tool positioning hole of the plastic shell, so that the wind wheel and the plastic shell become a non-rotatable whole, which makes it easy to install the blower assembly into the blower hole at the in-vehicle installation position. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention has the following accompanying drawings:

[0012] Figure 1 It is the appearance structure diagram of the present invention;

[0013] Figure 2 for Figure 1 The outer end view of

[0014] Figure 3 for Figure 2 The view without the wind wheel.

[0015] Figure 4 It is a three-dimensional structural diagram of a double-layer plastic shell.

[0016] Figure 5 for Figure 4 A partial cross-sectional view of

[0017] Figure 6 for Figure 4 The structural diagram of the separate outer plastic shell,

[0018] Figure 7 for Figure 4 The structural diagram of the separate inner plastic shell,

[0019] Figure 8 for Figure 7 A partial cross-sectional view of

[0020] Fig. 9 This is the appearance structure diagram of the blower motor.

[0021] Fig.10 This is the installation diagram of the carbon brushes inside the blower motor. DETAILED DESCRIPTION

[0022] As shown in the figure, the double-layer vibration-damping blower assembly of the present invention includes a blower motor 5, and the blower motor 5 has a double-headed motor shaft 9, on which a wind wheel 7 is fixedly installed, and the blower motor 5 is installed in two layers of inner and outer plastic shells, the inner plastic shell embraces the outer circle of the blower motor 5, and an inner vibration-damping structure is provided therebetween, the outer plastic shell embraces the inner plastic shell, and an outer vibration-damping structure is provided therebetween, the inner vibration-damping structure and the outer vibration-damping structure are formed by secondary injection molding of elastomer on the inner and outer surfaces of the inner plastic shell, and the wind wheel 7 is provided with three circumferentially arranged tool sockets 8 on the end face, and correspondingly, the end face of the outer plastic shell is provided with three tool positioning holes 6.

[0023] The inner plastic shell adopts an upper and lower half split type, the upper half 3 and the lower half 4 are connected by a buckle connection, the upper half 3 is provided with a buckle hook 20, the lower half 4 is provided with a buckle groove 19, the upper and lower halves are provided with left and right lugs 10 on the joint surface, the lug 10 is provided with a lifting ear hole 14, a rubber sleeve 11 is secondary injection molded in the lifting ear hole 14, the upper and lower ends of the rubber sleeve 11 are higher than the end surface of the lifting ear hole 14, a positioning socket 18 is provided in the middle of the rubber sleeve 11, and two rubber strips 17 are respectively provided along the outer surface of the upper half 3 and the lower half 4, and the rubber strips 17 are secondary injection molded in the rubber sleeve 11 The upper half 3 and the lower half 4 are integrally formed, and a plurality of rubber blocks 12 are provided on their inner surfaces; the outer plastic shell adopts an upper and lower half-ring split type, and the upper half ring 1 and the lower half ring 2 are connected by screw fastening. The upper half ring 1 is provided with a positioning rod 15 at a position corresponding to the positioning hole 18, and the positioning rod 15 is inserted into the positioning hole 18. The lower half ring 2 is provided with a screw hole 16 at a position below the positioning hole 18. The screw passes through the screw hole 16 from bottom to top and is tightened and fixed in the center rod hole 13 provided with the positioning rod 15.

[0024] The blower motor 5 has a carbon brush 23 and a brush holder 21. The carbon brush 23 is movably arranged in a brush box 22 installed on the brush holder 21. The brush holder 21 is elastically connected to the housing of the blower motor 5. The two carbon brushes 23 are staggered 180 degrees and arranged around a motor commutator 24 installed on the motor shaft 9. The installation center of the carbon brush 23 is offset from the center of the motor commutator 24.

Claims

1. A double-layer vibration-reducing blower assembly, comprising a blower motor, wherein the blower motor has a double-headed motor shaft, and a wind wheel is fixedly mounted on the double-headed motor shaft, and is characterized in that: The blower motor is installed in two layers of plastic shells, the inner plastic shell embraces the outer circle of the blower motor, an inner vibration-damping structure is arranged between the two, and the outer plastic shell embraces the inner plastic shell, an outer vibration-damping structure is arranged between the two; the inner vibration-damping structure and the outer vibration-damping structure are formed by secondary injection molding of elastic body on the inner and outer surfaces of the inner plastic shell; the inner plastic shell adopts an upper and lower half split type, the upper and lower halves are connected by buckling, the upper and lower halves are provided with left and right lugs on the joint surface, the lugs are provided with lifting lug holes, and rubber sleeves are secondary injection molded in the lifting lug holes A positioning hole is provided in the middle of the rubber sleeve, and a plurality of rubber strips are provided along the outer surfaces of the upper and lower halves. The rubber strips are integrally formed during the secondary injection molding of the rubber sleeve, and a plurality of rubber blocks are provided on the inner surfaces of the upper and lower halves; the outer plastic shell adopts an upper and lower half-ring split type, and the upper and lower half-rings are connected by screw fastening. A positioning rod is provided at a position corresponding to the positioning hole on the upper half ring, and the positioning rod is inserted into the positioning hole; a screw hole is provided at a position corresponding to the positioning hole on the lower half ring, and the screw passes through the screw hole from bottom to top and is tightened and fixed in the center rod hole provided with the positioning rod.

2. The double-layer vibration-damping blower assembly according to claim 1, characterized in that: The wind wheel is provided with a tool insertion hole on the end surface, and correspondingly, the end surface of the plastic shell is provided with a tool positioning hole.

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