Vehicular scroll compressor having housing arrangements for improved vibration isolation

Patent metadata

Field	Value
Publication number	US-9366254-B2
Application number	US-201213416878-A
Country	US
Kind code	B2
Filing date	Mar 9, 2012
Priority date	Mar 14, 2011
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

A scroll-type compressor for a vehicle, comprising a housing, a fixed scroll and a movable scroll provided in the housing, and a drive mechanism that is provided in the housing and that drives the movable scroll in a manner that disables rotating and enables orbit, by rotation of a drive shaft supported at a front end and a rear end by a front bearing device and a rear bearing device, is provided. The housing includes a first housing, a second housing and a third housing. The compressor includes a vibration isolator that is provided between the movable scroll and the first housing, wherein the vibration isolator is made of a vibration absorbing material and is capable of absorbing vibrations generated at the movable scroll to thereby prevent transfer of the vibrations from the movable scroll to the mounting member via the first housing.

First claim

What is claimed is:

1. A scroll compressor for a vehicle, comprising:
a housing, a fixed scroll, and a movable scroll provided in the housing;
a motor mechanism including a drive shaft, a stator, and a rotor, said motor mechanism being configured to rotate the drive shaft; and
a drive mechanism including an eccentric pin, a balancer-equipped bush, and a bearing device, said drive mechanism being provided in the housing to operably connect with the movable scroll via the drive shaft and that is configured to disable rotation of the movable scroll in a manner that enables orbit of the movable scroll, by rotation of the drive shaft, the drive shaft being supported at a front end and a rear end by a front bearing device and a rear bearing device, respectively, wherein the housing includes:
a first housing that holds the front bearing device and supports the front end of the drive shaft by the front bearing device, the first housing being provided with a mounting member configured to couple to the vehicle, and the motor mechanism being disposed inside the first housing;
a second housing that is fitted to the first housing, the second housing being formed from a combination of two distinct non-admixed materials, said two materials including a first material and a second material different from the first material and the first material forms a majority portion of the second housing and the second material forms a minority portion of the second housing, and the second housing further holds the rear bearing device that supports the rear end of the drive shaft; and
a third housing that is fixed to the first housing, wherein the third housing cooperates with the second housing to position the fixed scroll between the second and the third housings with the movable scroll placed between the second housing and the fixed scroll, and the fixed scroll further being fixed to the second housing,
wherein the first material is metal, and
the second material is one of plastic or resin, wherein the second housing has an outer peripheral edge facing radially outward with respect to the drive shaft, and the second material is disposed at the outer peripheral edge in a manner such that when the second housing is fitted in the first housing, the second material disposed at the outer peripheral edge engagingly contacts the first housing.

2. The scroll compressor for the vehicle according to claim 1 , wherein
the fixed scroll includes a metallic fixed scroll main body engaged with the movable scroll and a vibration-isolating member made of one of a plastic or resin material, the vibration-isolating member provided between an outer peripheral surface of the metallic fixed scroll main body and an inner peripheral surface of the first housing, so as to be adjacent to the minority portion of the second housing.

3. The scroll compressor for the vehicle according to claim 1 , wherein the fixed scroll is elastically supported in an axial direction together with the second housing by the first housing and the third housing.

4. The scroll compressor for the vehicle according to claim 3 , wherein,
the first housing is formed in the shape of a cup having an inner peripheral surface holding the motor mechanism and an inner bottom surface holding the front bearing device,
the second housing is disposed in the first housing, and
the third housing forms a discharge chamber together with the fixed scroll and closes the first housing.

5. The scroll compressor for the vehicle according to claim 4 , wherein a gap is provided between an outer peripheral surface of the fixed scroll and an inner peripheral surface of the first housing and between an axial end surface of the fixed scroll and the third housing.

6. The scroll compressor for the vehicle according to claim 5 , wherein an elastic body is provided between, and in contact with, the fixed scroll and the third housing, and a gasket is provided between, and in contact with, the first housing and the third housing.

7. The scroll compressor for the vehicle according to claim 1 , wherein the movable scroll is made of metal.

8. The scroll compressor for the vehicle according to claim 1 , further comprising a plurality of pins that fix the fixed scroll directly to the majority portion of the second housing.

9. The scroll compressor for the vehicle according to claim 1 , wherein at least a portion of the minority portion extends along a same direction as an axial direction of the drive shaft.

10. A scroll compressor for a vehicle, comprising:
a housing, a fixed scroll, and a movable scroll provided in the housing;
a motor mechanism including a drive shaft, a stator, and a rotor, said motor mechanism being configured to rotate the drive shaft; and
a drive mechanism including an eccentric pin, a balancer-equipped bush, and a bearing device, said drive mechanism being provided in the housing to operably connect with the movable scroll via the drive shaft and that is configured to disable rotation of the movable scroll in a manner that enables orbit of the movable scroll, by rotation of the drive shaft, the drive shaft being supported at a front end and a rear end by a front bearing device and a rear bearing device, respectively, wherein the housing includes:
a first housing that holds the front bearing device and supports the front end of the drive shaft by the front bearing device, the first housing being provided with a mounting member configured to couple to the vehicle, and the motor mechanism being disposed inside the first housing;
a second housing that is fitted to the first housing, the second housing being formed from a combination of two distinct non-admixed materials, said two materials including a first material and a second material different from the first material and the first material forms a majority portion of the second housing and the second material forms a minority portion of the second housing, and the second housing further holds the rear bearing device that supports the rear end of the drive shaft; and
a third housing that is fixed to the first housing, wherein the third housing cooperates with the second housing to position the fixed scroll between the second and the third housings with the movable scroll placed between the second housing and the fixed scroll, and the fixed scroll further being fixed to the second housing,
wherein the first material is metal, and
the second material is one of plastic or resin, wherein:
the majority portion includes a first main body and a second main body, the first main body holding the rear bearing device, and the second main body being disposed radially outward from the first main body;
the minority portion provided on an outer peripheral surface of the first main body so as to be disposed between the outer peripheral surface of the first main body and an inner peripheral surface of the second main body; and
the second main body is provided between an outer peripheral surface of the minority portion and an inner peripheral surface of the first housing.

11. A scroll compressor for a vehicle, comprising:
a housing, a fixed scroll, and a movable scroll provided in the housing;
a motor mechanism including a drive shaft, a stator, and a rotor, said motor mechanism being configured to rotate the drive shaft; and
a drive mechanism including an eccentric pin, a balancer-equipped bush, and a bearing device, said drive mechanism being provided in the housing to operably connect with the movable scroll via the drive shaft and that is configured to disable rotation of the movable scroll in a manner that enables orbit of the movable scroll, by rotation of the drive shaft, the drive shaft being supported at a front end and a rear

Assignees

• Murakami Kazuo
• Toyota Jidoshokki Kk

Inventors

• Murakami Kazuo

Classifications

• F01C21/10

  Outer members for co-operation with rotary pistons; Casings (casings for rotary engines or machines in general F16M) · CPC title

• F04C18/0215 Primary

  where only one member is moving · CPC title

• F04C23/008

  Hermetic pumps · CPC title

• F04C29/068

  the silencing means being arranged inside the pump housing · CPC title

• F04C2270/12

  Vibration · CPC title