JP2005083547A - Vibration-proof supporting structure of electric motor of fuel cell vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration-proof supporting structure of an electric motor of a fuel cell vehicle capable of absorbing the vibration of high frequency such as gear noise. <P>SOLUTION: An upper rubber elastic body 1 and a lower rubber elastic body 2 are fastened and fixed together with an upper face 4 side and a lower face 5 side of a car body frame 3 of the fuel cell vehicle by connection bolts 6, to be connected with the electric motor M, a projecting upper end part 8 of the lower rubber elastic body 2 is kept into contact with a lower end part of the upper rubber elastic body 1, a ring disc-shaped upper plate 9 to the electric motor M is fixed to an upper face of the upper rubber elastic body 1, a ring disc-shaped lower plate 10 to the car body frame 3 is fixed to its lower face, further an outer cylinder 12 for covering a lower half part 11 of the upper rubber elastic body 1 and a diaphragm 13 are mounted, and a first liquid chamber 14, a second liquid chamber 16 and an orifice 17 are formed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  In the present invention, the upper rubber-like elastic body and the lower rubber-like elastic body are fastened together with the connecting bolts on the upper surface side and the lower surface side of the vehicle body frame of the fuel cell vehicle and mounted on the upper rubber-like elastic body. The present invention relates to an anti-vibration support structure for an electric motor of a fuel cell vehicle connected to an electric motor for driving.

As disclosed in Patent Document 1, in recent years, fuel cell vehicles have been developed. Conventionally, an anti-vibration support structure for an electric motor of a fuel cell vehicle is configured by fixing an upper rubber-like elastic body and a lower rubber-like elastic body together on the upper surface side and the lower surface side of the body frame of the fuel cell vehicle with connecting bolts. In addition, vibration was absorbed only by both rubber-like elastic bodies.
JP 2003-109627 A

  However, high frequency vibrations such as gear noise are generated in the electric motor of the fuel cell vehicle, and high frequency vibrations cannot be absorbed only by the upper rubber elastic body and the lower rubber elastic body.

  An object of the present invention is to provide a vibration-proof support structure for an electric motor of a fuel cell vehicle that can absorb high-frequency vibration such as gear noise.

A feature of the present invention is that the upper rubber-like elastic body and the lower rubber-like elastic body are fastened together by connecting bolts on the upper surface side and the lower surface side of the body frame of the fuel cell vehicle, and placed on the upper rubber-like elastic body. An anti-vibration support structure for an electric motor of a fuel cell vehicle that is connected to the electric motor for traveling driving,
A protruding upper end portion of the lower rubber-like elastic body inserted into the through hole of the vehicle body frame is brought into contact with a lower end portion of the upper rubber-like elastic body, and an upper plate for the electric motor is placed on the upper surface of the upper rubber-like elastic body. A lower plate for the vehicle body frame is fixed to the lower surface, an outer cylinder that covers the lower half of the upper rubber-like elastic body, and a diaphragm that covers the space between the upper end of the outer cylinder and the upper plate are provided. A first liquid chamber is formed between the first rubber chamber and the lower half of the upper rubber elastic body, a second liquid chamber is formed between the diaphragm and the upper half of the upper rubber elastic body, and the first liquid chamber is formed. An orifice for communicating the liquid chamber and the second liquid chamber is formed, and the inner cylinder through which the connecting bolt is inserted is vertically penetrated.

  According to this configuration, the upper rubber-like elastic body and the diaphragm are elastically deformed by the input of vibration, the volumes of the first liquid chamber and the second liquid chamber are changed, and the liquid flows through the orifice. By resonating, high-frequency vibrations can be absorbed. In this case, since the protruding upper end of the lower rubber-like elastic body is in contact with the lower end of the upper rubber-like elastic body, the upward force applied to the electric motor is applied from the lower rubber-like elastic body to the upper rubber-like elastic body. The volume of the first liquid chamber and the second liquid chamber can be changed smoothly.

  In the present invention, the upper rubber-like elastic body is vulcanized and bonded to the lower plate, a rubber annular seal portion is bonded to the outer peripheral portion of the lower surface of the lower plate, and the outer cylinder is provided. When the bottom plate is formed in a bottom cylinder shape and the lower plate is superposed on the bottom of the outer cylinder, the liquid in the first and second liquid chambers can be prevented from leaking to the vehicle body frame side.

  ADVANTAGE OF THE INVENTION According to this invention, the anti-vibration support structure of the electric motor of the fuel cell vehicle which can absorb high frequency vibrations, such as a gear noise, was able to be provided.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the upper rubber-like elastic body 1 and the lower rubber-like elastic body 2 are fastened together with connecting bolts 6 on the upper surface 4 side and the lower surface 5 side of the body frame 3 of the fuel cell vehicle. The electric motor M for traveling driving placed on the upper rubber-like elastic body 1 is connected.

  The upper rubber-like elastic body 1 has a lower half portion 11 formed in a columnar shape, an upper half portion 15 formed in a truncated cone shape, and an upper end portion is vulcanized and bonded to a flange 21 on the lower end side of the ring-shaped first seal fitting 20. Yes. The first seal fitting 20 is concentric with the upper rubber-like elastic body 1, and a short cylindrical portion 22 rises from the inner peripheral portion of the flange 21 before assembly. A ring disk-shaped upper plate 9 for the electric motor M is fitted on the cylindrical portion 22, and the cylindrical portion 22 is bent radially outward to be caulked and fixed to the upper plate 9. Further, the lower end portion of the upper rubber-like elastic body 1 is vulcanized and bonded to the upper surface of the ring disc-like lower plate 10 with respect to the vehicle body frame 3. In this way, the upper plate 9 is fixed to the upper surface of the upper rubber-like elastic body 1 and the lower plate 10 is fixed to the lower surface.

  And the bottomed round cylindrical outer cylinder 12 which covers the lower half part 11 of the upper rubber-like elastic body 1 is provided, the lower plate 10 is superposed on the bottom of the outer cylinder 12, and the upper end portion and the upper plate of the outer cylinder 12 are overlapped. A diaphragm 13 made of a rubber film covering the space 9 is provided, and a first liquid chamber 14 is formed between the outer cylinder 12 and the lower half 11 of the upper rubber-like elastic body 1. The first liquid chamber 14 is formed by passing the axially intermediate portion of the upper rubber-like elastic body 1 radially inward over the entire circumference. Thereby, the volume of the first liquid chamber 14 is changed by the input of vibration. The rubber-like elastic body portion located below the first liquid chamber 14 is fitted in the outer cylinder 12.

  The diaphragm 13 is vulcanized and bonded to the upper plate 9 and the flange 25 on the upper end side of the cylindrical second seal fitting 24, and the second seal fitting 24 is press-fitted and fitted into the outer cylinder 12. A rubber film 26 is vulcanized and bonded to the upper surface of the upper plate 9.

  A second liquid chamber 16 is formed between the diaphragm 13 and the upper half 15 of the upper rubber-like elastic body 1, and an orifice 17 is formed to communicate the first liquid chamber 14 and the second liquid chamber 16. The orifice 17 is formed over the entire circumference between the outer cylinder 12 and the upper end side of the lower half portion 11 of the rubber-like elastic body 1. An annular seal 23 made of rubber is vulcanized and bonded to the outer peripheral side of the lower surface of the lower plate 10 to prevent liquid leakage in the first and second liquid chambers 14 and 16.

  The lower rubber-like elastic body 2 is vulcanized and formed integrally with a metal washer 27 on the lower end side, and has an intermediate portion in the axial direction. A protruding upper end portion 8 of the lower rubber-like elastic body 2 is inserted into the through hole 7 of the vehicle body frame 3 and brought into contact with a lower end portion of the upper rubber-like elastic body 1.

Then, the inner cylinder 19 through which the connecting bolt 6 is inserted passes through the upper plate 9, the upper rubber-like elastic body 1, the lower plate 10, the bottom of the outer cylinder 12, and the center of the lower rubber-like elastic body 2, and the lower side It is brought into contact with the upper surface of the washer 27 on the rubber-like elastic body 2 side.
[Another embodiment]
The orifice 17 may be formed not in the entire circumference between the upper rubber-like elastic body 1 and the outer cylinder 12 but in a part in the circumferential direction.

Longitudinal front view showing anti-vibration support structure for electric motor of fuel cell vehicle Longitudinal front view of each component of the vibration isolator

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper rubber-like elastic body 2 Lower rubber-like elastic body 3 Vehicle body frame 4 Upper surface of vehicle body frame 5 Lower surface of vehicle body frame 6 Connecting bolt 7 Through hole 8 Projection upper end 9 Upper plate 10 Lower plate 11 Below upper rubber-like elastic body Half part 12 Outer cylinder 13 Diaphragm 14 First liquid chamber 15 Upper half part of upper rubber-like elastic body 16 Second liquid chamber 17 Orifice 19 Inner cylinder 23 Annular seal part M Electric motor

Claims (2)

The upper rubber-like elastic body and the lower rubber-like elastic body are fastened together with connecting bolts on the upper surface side and the lower surface side of the vehicle body frame of the fuel cell vehicle, and are mounted on the upper rubber-like elastic body and are electrically driven for driving. An anti-vibration support structure for an electric motor of a fuel cell vehicle connected to a motor,
A protruding upper end portion of the lower rubber-like elastic body inserted into the through hole of the vehicle body frame is brought into contact with a lower end portion of the upper rubber-like elastic body, and an upper plate for the electric motor is placed on the upper surface of the upper rubber-like elastic body. A lower plate for the vehicle body frame is fixed to the lower surface, an outer cylinder that covers the lower half of the upper rubber-like elastic body, and a diaphragm that covers the space between the upper end of the outer cylinder and the upper plate are provided. A first liquid chamber is formed between the first rubber chamber and the lower half of the upper rubber elastic body, a second liquid chamber is formed between the diaphragm and the upper half of the upper rubber elastic body, and the first liquid chamber is formed. An anti-vibration support structure for an electric motor of a fuel cell vehicle, wherein an orifice for communicating a liquid chamber and a second liquid chamber is formed, and an inner cylinder through which the connecting bolt is inserted is vertically penetrated.   The upper rubber-like elastic body is vulcanized and bonded to the lower plate, a rubber annular seal portion is bonded to the outer peripheral portion of the lower surface of the lower plate, and the outer cylinder is formed into a bottomed cylindrical shape. 2. The anti-vibration support structure for an electric motor of a fuel cell vehicle according to claim 1, wherein the lower plate is superposed on the bottom of the outer cylinder.

Images