KR101732261B1 - Electric compressor - Google Patents

Abstract

The motor-driven compressor includes a compression section, a motor for driving the compression section, a cylindrical housing for accommodating the compression section and the motor therein, a support member, and a first vibration damper. The support member supports the housing and is configured to be fixed to an object to which the motor-driven compressor is attached. The first vibration damper is disposed between the housing and the support member to keep the housing from the support member and the object in a noncontact state. The first vibration damper has a hollow enclosed space therein.

Description

[0001] ELECTRIC COMPRESSOR [0002]

The present invention relates to an electric compressor.

Japanese Patent Laying-Open No. 2013-224652 discloses a cylindrical motor-driven compressor configured for use in a vehicle air conditioner. The motor-driven compressor includes a housing, two support members, and a vibration damper. The housing has a motor and a compression section driven by the motor. The support member is formed in a semi-cylindrical shape and supports the housing by holding the housing on its periphery. The support member is secured to any part or object within the engine compartment of the vehicle (e.g., a vehicle frame or engine). That is, the housing is fixed to the object via the support member. The vibration damper is disposed between the respective support members and the housing such that the support member and the housing are not in direct contact with each other.

According to the configuration of the electric compressor disclosed in Japanese Patent Application Laid-Open No. 2013-224652, the vibration damper prevents the vibration from the compression unit and the motor from being transmitted to the engine. However, the vibration damper used in the motor-driven compressor disclosed in this patent document is formed of solid rubber. Heat is relatively easily generated in such solid rubber due to vibration, and therefore the durability of the heated vibration damper is lowered, which may lead to poor vibration damper characteristics.

The present invention relates to providing a motor-driven compressor, and more particularly, to a motor-driven compressor in which vibration from a housing is prevented from being transmitted to an object attached to a housing of the compressor.

According to an aspect of the present invention, there is provided a motor-driven compressor including a compression section, a motor for driving the compression section, a cylindrical housing for accommodating the compression section and the motor therein, a support member, and a first vibration damper. The support member supports the housing and is configured to be secured to an object to which the compressor is attached. The first vibration damper is disposed between the housing and the support member. The first vibration damper keeps the housing in a non-contact state with the support member and the object. The first vibration damper has a hollow surrounding space.

In the motor-driven compressor according to the embodiment of the present invention, the first vibration damper is disposed between the housing and the support member so that the housing is not in contact with the support member, and thus the vibration of the housing is transmitted through the support member to the object . Since the housing and the object do not contact each other, the vibration of the housing is prevented from being directly transmitted to the object. The first vibration damper is formed hollow. Specifically, the first vibration damper has a space surrounded and sealed from the outside. Choosing a material filling the hollow space of the first vibration damper as a material that generates less heat under vibration than the material of the first vibration damper further prevents heat generation due to vibration as compared with a solid vibration damper. Therefore, the durability of the first vibration damper against the heat is improved, and the transmission of vibration from the housing to the object is effectively prevented.

Other aspects and advantages of the present invention will become apparent from the following detailed description, which, taken in conjunction with the accompanying drawings, illustrate by way of example, the principles of the invention.

1 is a longitudinal cross-sectional view of an electric compressor according to a first embodiment of the present invention cut along the axis of the housing;
Fig. 2 is a cross-sectional view taken along line II-II in Fig.
Fig. 3 is a longitudinal cross-sectional view showing the motor-compressor of Fig. 1 and a pair of assemblies each including a vacuum damper and a support member that have not yet been inflated before being mounted to the housing of the motor-driven compressor.
Fig. 4 is a longitudinal cross-sectional view of the motor-driven compressor with the paired assembly of Fig. 3 mounted in a predetermined position on the housing of the motor-driven compressor.
5 is a cross-sectional view of an electric compressor according to a first modification of the present invention.
6 is a cross-sectional view of a motor-driven compressor according to a second modification of the present invention, showing a state in which a pressure of a vibration damper is maintained in a specific range;
7 is a cross-sectional view of an electric compressor according to a second modification of the present invention, showing a state in which the atmospheric pressure of one of the vibration dampers is under a specific range;
8A is a cross-sectional view of one of the vibration dampers and its periphery along the line VIIIA-VIIIA of FIG. 6;
FIG. 8B is a cross-sectional view of one of the vibration dampers and its peripheral portion along line VIIIB-VIIIB of FIG. 7; FIG.
9 is a cross-sectional view of an electric compressor according to a second embodiment of the present invention;
10 is a cross-sectional view of an electric compressor according to a third modification of the present invention.
11 is a cross-sectional view of an electric compressor according to a third embodiment of the present invention.
12 is a cross-sectional view of an electric compressor according to a fourth modification of the present invention.
13 is a cross-sectional view of an electric compressor according to a fourth embodiment of the present invention.
14 is a cross-sectional view of an electric compressor according to a fifth modification of the present invention.
15 is a sectional view of a supporting member and a vibration damper of an electric compressor according to a fifth embodiment of the present invention.

The main features of the embodiments to be described hereinafter will be described. It is noted that the technical elements described below are all independent and represent technical utility when used alone or in various combinations, and the combination of these technical elements is not limited to what is described in the present disclosure.

First Embodiment

A first embodiment of the present invention will now be described with reference to Figs. An electric compressor, designated by reference numeral 10, is mounted on an electric or hybrid vehicle and is configured for use in a vehicle air conditioner. In Fig. 2, the engine to which the electric compressor 10 is mounted is denoted by reference numeral 60, but in Figs. 1, 3 and 4, the engine 60 is not shown. It should be noted that some cross-sections are not shown in the figure as hatching, and the internal configuration of the housing 12 in Fig. 2 is not shown. 1, the motor-driven compressor 10 includes a substantially cylindrical housing 12, a rotating shaft 39 rotatably supported on the housing 12, a motor 34 including a stator coil 30 and a rotor 34, , And a compression section (22). The motors 30, 34 and the compression section 22 are housed in a housing 12. The motor compressor further includes a pair of tubes 50A and 50B extending around the periphery of the housing 12 and a pair of rims 54A and 54B supporting the housing 12 (see FIG. 2). The rotating shaft 39 extends in the axial direction of the housing 12 (the horizontal direction in Fig. 1). The motors 30 and 34 are disposed on one end side (or the right side in FIG. 1) of the rotary shaft 39 and the compression unit 22 is disposed on the other end side of the rotary shaft 39. Specifically, the motors 30, 34 and the compression section 22 are arranged along the axial direction of the housing 12. [ The powered motors 30 and 34 drive the rotary shaft 39 and then drive the compression unit 22. Although not shown in the drawings, the motor-driven compressor 10 may be provided with an inverter.

The housing 12 includes a cylindrical motor housing 16 having a closed end, a front housing 18 mounted to the motor housing 16, and a front housing 18 disposed on the left side of the motor housing 16, And an ejection housing 20 for closing the open end.

The motor housing 16 is made of metal such as aluminum. The motor housing 16 includes a peripheral wall and a bottom wall 16B. The motor housing 16 has a suction port 16A penetrating its peripheral wall. The suction port 16A is located at a position adjacent to the bottom wall 16B of the motor housing 16. [ A plain bearing 47 for rotatably supporting one end (or the right end in Fig. 1) of the rotary shaft 39 is disposed in the bottom wall 16B of the motor housing 16. [

The front housing 18 is made of a metal such as an aluminum alloy. The front housing 18 provided in the motor housing 16 divides the interior of the motor housing 16 into a space in which the motors 30 and 34 are disposed and a space in which the compression section 22 is disposed. A plain bearing 45 is disposed in the front housing 18 for rotatably supporting the other end (or the left end in FIG. 1) of the rotation shaft 39.

The discharge housing 20 has a cylindrical shape having a closed end, and is made of a metal such as an aluminum alloy. The discharge housing 20 has a discharge port 20A through which the discharge housing 20 passes. The discharge chamber 20B is formed between the compression section 22 and the discharge housing 20 in a state in which the discharge housing 20 is mounted on the motor housing 16. [ The discharge chamber 20B is communicable with the outside through the discharge port 20A.

The rotating shaft 39 is mounted on the housing 12. The rotating shaft 39 is rotated by the plane bearing 47 provided at the motor housing 16 at one end thereof and by the plane bearing 45 provided at the other end of the front housing 18 at the other end thereof, .

The motors 30 and 34 are disposed on one side of the front housing 18 adjacent to the bottom wall 16B of the motor housing 16 (or on the right side of the front housing 18 in Fig. 1). The motors 30 and 34 include a rotor 34 fixed to a rotary shaft 39 and a stator 30 disposed radially outward of the rotor 34. [ A coil wire (not shown) is wound around the teeth (not shown) of the stator 30. The motors 30 and 34 are electrically connected to a drive circuit (not shown) and driven by AC power supplied from a drive circuit.

The compression portion 22 is disposed on the opening end side (the left side of the front housing 18 in Fig. 1) of the motor housing 16. The compression section 22 includes a fixed scroll 26 fixed to the motor housing 16 and a movable scroll 24 arranged to face the fixed scroll 26. [ The fixed scroll (26) and the movable scroll (24) are meshed with each other in such a manner that the compression chamber (22A) is formed therebetween. The volume of the compression chamber (22A) changes in accordance with the turning movement of the movable scroll (24). The compression chamber 22A is capable of communicating with the space of the motor housing 16 in which the motors 30 and 34 are disposed, and discharges the refrigerant gas from this space. The compression chamber 22A communicates with the discharge chamber 20B and discharges the compressed refrigerant gas to the discharge chamber 20B.

2, the tubes 50A and 50B (only the tube 50A is shown in the figure) are each formed substantially annular around the circumference of the motor housing 16, and are made of natural rubber (NB), isoprene rubber (IR), butadiene rubber (BR), butyl rubber (IIR), ethylene propylene diene rubber (EPDM), and silicone rubber. As shown in Figures 1 and 2, tubes 50A and 50B are made hollow and the interior of each tube 50A and 50B is surrounded and sealed from the outside. As shown in Fig. 1, the tubes 50A and 50B are provided with valves 52A and 52B, respectively, and air is injected and removed from the tubes 50A and 50B through the valves 52A and 52B. As shown in Figures 1 and 2, tubes 50A and 50B are inflated with an appropriate volume of air and the air pressure is maintained in a certain range. As shown in Figure 1, the tubes 50A and 50B are formed by extending along the entire circumference of each of the annular tubes 50A and 50B at its periphery (the radially outer surface of the tubes 50A and 50B) Grooves 51A and 51B, respectively. Grooves 51A and 51B are provided equidistantly in the radial direction in the cross section of tubes 50A and 50B of FIG. It should be noted that the material of the tubes 50A and 50B is not limited to rubber, and any other material such as? GEL (registered trademark) may be used. The tubes 50A and 50B correspond to examples of the first vibration damper of the present invention, and the grooves 51A and 51B correspond to the recesses of the present invention, respectively.

The motor housing 16 has a pair of grooves 16C and 16D, each extending along the entire circumference of the motor housing 16 at its periphery. The grooves 16C are formed on the side of the motors 30 and 34 with respect to the axial center of the housing 12 and the grooves 16D are formed on the side of the compressing portion 22 respectively. An imaginary plane passing through the center of each groove 16C, 16D is orthogonal to the axis of the housing 12. The tubes 50A and 50B are respectively fitted along the grooves 16C and 16D. The inner diameter of the annular tubes 50A, 50B having an initial pressure maintained within a certain range substantially corresponds to the outer diameter of the motor housing 16 when measured at the bottom of the grooves 16C, 16D. The grooves 16C and 16D in the periphery of the motor housing 16 facilitate the positioning of the tubes 50A and 50B. The outer diameter of the motor housing 16 measured at the position including the grooves 16C and 16D is smaller than the outer diameter of the motor housing 16 measured at a position other than the position including the grooves 16C and 16D. The diameter dimensions of the motor-driven compressor 10 measured at the positions where the tubes 50A and 50B are fitted are set to be the same as the diameters of the grooves 16C and 16D And the like are not formed.

As shown in FIG. 2, rims 54A and 54B (only rim 54A in the figure) are each formed substantially annular around tubes 50A and 50B, and are made of metal such as aluminum alloy . As shown in Fig. 1, the rims 54A and 54B are formed in a substantially circular arc shape. Specifically, the inner peripheral surfaces of the rims 54A and 54B are curved along the outer peripheral surfaces of the tubes 50A and 50B, respectively. The rims 54A and 54B have five protrusions 56A and 56B formed on the inner peripheral surface of the rim 54A and 54B, respectively, extending along the entire circumference of the tubes 50A and 50B. The protrusions 56A, 56B are equidistantly spaced in the circumferential direction in the cross section of each tube 50A, 50B in Fig. The spacing of any two adjacent projections 56A, 56B of the rims 54A, 54B is substantially the same as the spacing of any two adjacent grooves 51A, 51B of the tubes 50A, 50B, respectively. The width and height of the projections 56A, 56B are substantially equal to the width and depth of the grooves 51A, 51B. The inner diameter of the rims 54A and 54B is substantially the same as the outer diameter of the tubes 50A and 50B so that the protrusions 56A and 56B of the rims 54A and 54B are formed in the grooves 51A and 51B of the tubes 50A and 50B Respectively, thereby preventing the tubes 50A and 50B from being displaced from the rims 54A and 54B, respectively. Tubes 50A and 50B are disposed between motor housing 16 and rims 54A and 54B, respectively. The tubes 50A and 50B are in intimate contact with the motor housing 16 and the rims 54A and 54B, respectively, when the pressures of the tubes 50A and 50B are maintained within a certain range. The rims 54A and 54B do not contact the motor housing 16 because the tubes 50A and 50B are disposed between the rims 54A and 54B and the motor housing 16 as shown in Fig. Note that the rims 54A and 54B correspond to one example of the support member of the present invention, and the protrusions 56A and 56B correspond to one example of the protrusion of the present invention.

As shown in Fig. 1, the rims 54A and 54B have flat plate-shaped mounting portions 58A and 58B at the top and bottom, respectively. Each of the mounting portions 58A and 58B has a wide surface parallel to the axial direction of the housing 12. [ As shown in Fig. 2, the engine 60 has two mounting protrusions 62 from which one another protrudes from one side of the engine 60. The protrusions 62 extend in the direction away from the view of Fig. 2, or extend axially along the housing 12. Fig. Each protrusion 62 extends to such an extent that the end surface of the protrusion 62 (the left surface in FIG. 2) contacts one of the wide surfaces (the right surface in FIG. 2) of the mounting portions 58A and 58B. The mounting portions 58A and 58B are fastened to the ends of the projections 62 by the bolts 64 thereby fixing the rims 54A and 54B to the engine 60. [ Thus, the housing 12, which is supported by the rims 54A and 54B, is fixed to the engine 60. [ The rims 54A, 54B extending around the periphery of the motor housing 16 securely support the housing 12. A portion of the housing 12 (the right portion of the housing 12 of FIG. 2) is located in the recessed space defined by the protrusions 62 and the surface of the engine 60. As shown in Fig. 2, the rims 54A and 54B only contact the engine 60 at the mounting portions 58A and 58B. Note that the engine 60 corresponds to an example of an object of the present invention to which an electric compressor is attached.

The procedure for assembling the tubes 50A, 50B and the rims 54A, 54B to the motor housing 16 will now be described with reference to Figs. First, the tubes 50A, 50B are prepared with the rims 54A, 54B and the air removed (i.e., the pressures of the tubes 50A, 50B are below a certain range). The tubes 50A and 50B are then assembled to the rims 54A and 54B by inserting the projections 56A and 56B of the rims 54A and 54B into the grooves 51A and 51B of the tubes 50A and 50B, respectively. Since the tubes 50A and 50B are made of elastic rubber, the grooves 51A and 51B and the engagement of the protrusions 56A and 56B cause the tubes 50A and 50B to contact the rims 54A and 54B ). By this engagement, the outer circumferential edges of the tubes 50A and 50B are fixed to the inner circumferential portions of the rims 54A and 54B, respectively, so that the tubes 50A and 50B and the rims 54A and 54B are integrated. In the following description, the tubes 50A, 50B secured to the rims 54A, 54B may also be referred to as tube assemblies 55A, 55B.

Subsequently, the tube assembly 55A is fitted over the periphery of the motor housing 16 by mounting the bottom wall 16B and is disposed in the groove 16D (see Fig. 4). Thereafter, the tube assembly 55B is fitted in the same manner onto the periphery of the motor housing 16 by fitting from the discharge housing 20 side, and fitted into the groove 16C (see Fig. 4). Air is removed from the tubes 50A and 50B when assembling the tube assemblies 55A and 55B onto the motor housing 16 and the inner diameter of each annular tube 50A and 50B is greater than the outer diameter of the housing 12 Specifically, the outer diameter of the housing 12 is measured at positions other than the grooves 16C and 16D). Thus, the tube assemblies 55A, 55B are easily fitted over the motor housing 16. [

The tubes 50A and 50B are then expanded by injecting air through the valves 52A and 52B, respectively. The air is injected until the atmospheric pressure of the tubes 50A and 50B reaches a certain range of values. By doing so, the tubes 50A and 50B are expanded and elastically deformed radially inwardly (toward the housing 12) and brought into contact with the surfaces of the grooves 16C and 16D. In other words, the tubes 50A and 50B apply an elastic force acting radially inward against the motor housing 16. The tubes 50A and 50B are made of a rubber material. The tubes 50A and 50B expanded to come into contact with the respective grooves 16C and 16D are held at predetermined positions in the grooves 16C and 16D and the displacement of the tubes 50A and 50B is transmitted to the tubes 50A and 50B, 50B and the grooves 16C, 16D. Thus, the tube assemblies 55A, 55B are assembled to the motor housing 16. [ Assembly of the tubes 50A and 50B and the rims 54A and 54B to the motor housing 16 is simultaneously carried out since the tubes 50A and 50B and the rims 54A and 54B are integrated together in one structure , The assembly procedure can be simplified. The mounting portions 58A and 58B of the rims 54A and 54B are then secured to the engine 60 by the bolts 64 so that the housing 12 supported by the rims 54A and 54B is engaged with the engine 60 . Note that the tubes 50A and 50B may be inflated after the rims 54A and 54B are secured to the engine 60.

The operation of the motor-driven compressor 10 will now be described. When the electric power is supplied from the drive circuit (not shown) to the motors 30 and 34, the rotary shafts 39 are driven by the motors 30 and 34. The rotation of the rotary shaft 39 causes the movable scroll 24 to rotate and the volume of the compression chamber 22A of the compression section 22 is changed by the orbiting movement of the movable scroll 24. [ The refrigerant gas introduced through the inlet port 16A flows in the axial direction to the motor housing 16 and is then taken to the compression chamber 22A of the compression section 22. [ The refrigerant gas is compressed in the compression chamber (22A) by the orbiting movement of the movable scroll (24). The compressed refrigerant gas is sent to the discharge chamber 20B and is discharged to the outside of the housing 12 through the discharge port 20A. The pressures of the tubes 50A and 50B are regularly checked, and air is added through the valves 52A and 52B as needed. The atmospheric pressure of the tubes 50A and 50B is maintained within the characteristic range so that the predetermined vibration damping of the tubes 50A and 50B is maintained for a long period of time.

In motor compressor 10, tubes 50A and 50B are disposed between motor housing 16 and rims 54A and 54B, respectively, such that motor housing 16 and rims 54A and 54B are connected to tubes 50A and 50B ). The tubes 50A and 50B allow the vibrations of the compression section 22 and the motors 30 and 34 to be transmitted to the engine 60 through the rims 54A and 54B and the motor housing 16 (or the housing 12) ≪ / RTI > The tubes 50A and 50B also prevent the vibration of the engine 60 from being transmitted to the housing 12. The tubes 50A and 50B filled with air and filled with air effectively prevent heat generation due to vibration as compared with the solid tube. Thus, the deterioration of the durability of the tubes 50A, 50B against heat is improved, and the predetermined vibration damping between the housing 12 and the engine 60 is maintained for a long time.

In the motor-driven compressor 10, the tubes 50A and 50B, which are formed in a substantially annular shape, can be accurately set at predetermined positions on the periphery of the motor housing 16. Particularly, in this embodiment, as compared with a configuration in which tubes such as the tubes 50A and 50B are partially disposed only on the periphery of the motor housing 16, it is formed of elastic rubber and covers the entire periphery of the motor housing 16 The inserted tubes 50A and 50B can be prevented from being displaced on the motor housing 16 due to the vibration and the vibration of the compression section 22 and the motors 30 and 34 can be transmitted to the engine 60 via the housing 12. [ Can be successfully prevented from being transmitted.

The tubes 50A and 50B and the rims 54A and 54B are fixed to each other by fitting the projections 56A and 56B of the rims 54A and 54B into the grooves 51A and 51B of the tubes 50A and 50B, In the motor-driven compressor 10, displacement of the tubes 50A and 50B relative to the rims 54A and 54B can be prevented. The position of the tubes 50A and 50B relative to the rims 54A and 54B and the noncontact state between the rims 54A and 54B and the motor housing 16 is determined by the contact of the rims 54A and 54B It may not be affected by any vibration or any vibration of the motor housing 16. [

First Modification

A first modification of the present invention will now be described with reference to Fig. In the following description of the first modification, only the differences from the first embodiment will be described, and a detailed description of the configuration common to the first embodiment will be omitted. This applies to other embodiments and modifications unless otherwise specified. Note that the internal structure of the housing 12 is not shown in Fig. This also applies to Figs. 6, 7, and 9-14. In a first variant, substantially identical tube assemblies, each comprising a tube and a rim, are fitted into the respective grooves 16C, 16D of the motor housing 16. This also applies to other embodiments and modifications described below.

The first modification of Fig. 5 differs from the first embodiment in the configuration of the tube. Specifically, the first modification differs from the first embodiment in that instead of the substantially annular tube 50A, two substantially arcuate tubes 150A, 152A are disposed between the rim 54A and the motor housing 16, . The tubes 150A and 152A are hollow and the interior of each tube 150A and 152A is surrounded and sealed from the outside of the tube. The tubes 150A and 152A are inflated with an appropriate volume of air and the air pressure of the tubes 150A and 152A is maintained within a certain range. The procedure for assembling the tubes 150A, 152A and the rim 54A to the housing 12 is substantially the same as in the first embodiment.

The configuration according to the first modified example exhibits substantially the same effect as the first embodiment. The use of two tubes, 150A and 152A, respectively disposed between the motor housing 16 and the rims 54A and 54B, facilitates the maintenance of the tube (the rim 54B is not shown in Fig. 5 being). Specifically, when each tube 150A, 152A is smaller than the annular tubes 50A, 50B of the first embodiment, and thus any defects are found in the tubes 150A, 152A, the tube 150A , 152A can be easily replaced. Also, the first variant can only replace one with a defect in the tube, which reduces the cost associated with tube replacement. The number of tubes disposed between the motor housing 16 and the rims 54A, 54B is not limited to two, and three or more tubes may be used in a single tube assembly.

Second Modification

A second modification of the present invention will now be described with reference to Figs. The second variant is the one in which two sheets 70, one sheet 70 between the rim 254A and the tube 150A and another sheet 70 between the rim 254A and the tube 152A are added Which is different from the first modification. FIG. 6 shows a state in which the air pressure of the tubes 150A and 152A is maintained within a certain range, and FIG. 7 shows a state in which a part of the air is discharged from the tube 152A and the air pressure of the tube 152A falls within a specific range do. FIG. 8A is a cross-sectional view of tube 152A of FIG. 6, and FIG. 8B is a cross-sectional view of tube 152A of FIG. 8A and 8B follows a plane perpendicular to the extending direction of the tube 152A. As shown in FIGS. 6 and 8A, the sheet 70 between the rim 254A and the tube 152A contacts both the rim 254A and the tube 152A. The sheet 70 is formed in a substantially circular arc shape and is made of rubber such as EPDM and silicone rubber. The sheet 70 is solid and has a C-shaped cross section. The sheet 70 is disposed to partially extend around the outer periphery of the tube 152A. As shown in Figs. 8A and 8B, the sheet 70 has three grooves (not shown) extending along the circumference of each tube 150A, 152A (in the direction in which the sheet 70 extends) 71). The rim 254 has three grooves 256A at positions corresponding to the respective grooves 71 of the sheet 70 at its inner periphery. And each protrusion 256A is fitted in the corresponding groove 71. 8A, when the air pressure of the tube 152A is maintained within a certain range, the opposite ends of the seat 70 in the circumferential direction are not in contact with the peripheral surface of the motor housing 16. Fig. The material of the sheet 70 is not limited to rubber but other materials such as? GEL (registered trademark) may be used. The seat 70 corresponds to the example of the auxiliary vibration damper of the present invention. The sheet 70 disposed between the rim 254A and the tube 152A and the sheet 70 disposed between the rim 254A and the tube 150A have substantially the same configuration and are arranged in the same manner.

Next, the positional relationship between the tubes 150A, 152A and the motor housing 16 when the air pressure of the tube 150A is kept within a certain range, while the air pressure of the tube 152A is below a certain range is described with reference to Fig. 7 do. The tubes 150A and 152A act radially inwardly on the motor housing 16 when the air pressure of the tubes 150A and 152A is maintained within a certain range (or in the axial center O1 of the motor housing 16 ) In the direction of the axis). 7, when a portion of the air is discharged from the tube 152A, the motor housing 16 is urged toward the tube 152A by the elastic force of the tube 150A, Moves to the right as shown in Fig. The moving distance of the motor housing 16 increases with decreasing air pressure of the tube 152A. When the air pressure of the tube 152A falls below a certain range and the position of the axial center of the motor housing 16 shifts from O1 to O2, the opposite side of the seat 70 disposed in the tube 152A is shown in Fig. And comes into contact with the outer peripheral surface of the motor housing 16, as shown in Fig.

The motor housing 16 is moved toward the tube 152A by the elastic force of the tube 150A and the seat 70 is moved toward the seat 152A by the elastic force of the tube 150A, Is brought into contact with the outer circumferential surface of the motor housing 16. As shown in Fig. The seat 70 then contacts both the rim 254A and the motor housing 16 and prevents vibration from the housing 12 from being transmitted to the engine 60 through the rim 254A. That is, even if the air pressure of the tube 152A is lowered and thus the vibration damping is lowered, the seat 70 additionally prevents the vibration from the housing 12 from being transmitted to the engine 60 continuously. Therefore, the transmission of vibration from the housing 12 to the engine 60 is prevented for a long time, and the reliability of the motor-driven compressor itself is improved. In the second variant, the sheet 70 is also disposed on the outer periphery of the tube 150A. The motor housing 16 is moved toward the tube 150A and the sheet 70 on the tube 150A is moved toward the center of the tube 150A when the air pressure of the tube 150A is below a certain range, The outer peripheral surface of the motor housing 16 is brought into contact with the opposite end of the motor housing 16. Thus, transmission of vibration from the housing 12 to the engine 60 is prevented.

Second Embodiment

A second embodiment of the present invention will now be described with reference to Fig. The configuration of the rim of the second embodiment is different from that of the first embodiment. Specifically, the rim of the second embodiment is formed by a pair of rims 354A, 356A that are substantially return type. The rims 354A and 356A have substantially the same shape. The rims 354A and 356A have plate-shaped mounting portions 358A and 360A, respectively, at the upper and lower positions as shown in Fig. The substantially annular rim is formed by interconnecting the opposite wide side of the mounting portion 358A of the rim 354A and the corresponding opposite side of the mounting portion 360A of the rim 356A.

A procedure for assembling the tube 50A and the rims 354A and 356A to the motor housing 16 will be described. The tube 50A, from which the air has been removed in advance, is fitted over the motor housing 16 from the bottom wall 168 and is fitted in a predetermined position of the groove 16C. And the tube 50A is inflated by injecting air through a valve (not shown) until the pressure of the tube 50A reaches a value within a certain range. In the second embodiment, the valve is mounted directly to the tube 50A and is not exposed outwardly through the rim. The rims 354A and 356A are then mounted on the outer periphery of the tube 50A. Specifically, the rims 354A and 356A are mounted so that the rims 354A and 356A surround the motor housing 16. When the air pressure of the tube 50A is within a certain range, the outer diameter of the tube 50A is substantially equal to the diameter of the circle formed by the inner periphery of the rims 354A and 356A as shown in the cross section in Fig. With the rims 354A and 356A disposed above the tube 50A the opposing wide face of the mounting portion 358A of the rim 354A and the corresponding opposing wide face of the mounting portion 360A of the rim 356A are brought into contact with each other do. The mounting portion 358A and the mounting portion 360A are fixed to the projecting portion 62 of the engine 60 by the bolts 64. [ The rims 354A, 356A are connected to one another over the housing 12. The housing 12 supported by the rims 354A, 356A is thus fixed to the engine 60.

The second embodiment also exhibits substantially the same effect as the first embodiment. In a second embodiment in which the tube 50A is fitted in the groove 16C of the motor housing 16 and thereafter expanded by air before the rims 354A and 356A are attached to the tube 50A, It is difficult to be displaced with respect to the motor housing 16. Thus, tube 50A is not easily displaced when rim 354A, 356A is attached to tube 50A, which facilitates attachment of rim 354A, 356A to tube 50A. When the tube assembly having the tube 50A yet to be inflated with air is fitted into the motor housing 16, the tube assembly is not firmly fixed to the motor housing 16 at the time when the tube 50A is inflated by air . Thus, the tube assembly can be displaced from a specific location on the housing 12 while air is being injected into the tube 50A. According to the configuration of the second embodiment, however, such displacement of the tube 50A is prevented, and the tube 50A and the rims 354A and 356A can be appropriately assembled to the motor housing 16 at a specific position. Note that the number of rims is not limited to two, but three or more rims may be used.

Third Modification

A third modification will now be described with reference to Fig. In a third variation, a tube assembly 150A, 152A of the first variant is disposed between the motor housing 16 and the rims 354A, 356A of the second embodiment, respectively. The procedure for assembling the tubes 150A, 152A to the motor housing 16 will be described. First, tubes 150A, 152A are secured to the inner periphery of rims 354A, 356A to form tube assemblies 355A, 357A, respectively. The tube assemblies 355A and 357A are then inserted into the grooves 16C of the motor housing 16 and the tube assemblies 355A and 357A encircle the motor housing 16. Secondly, in a state in which the wide surface of the mounting portion 358A of the tube assembly 355A and the wide surface of the mounting portion 360A of the tube assembly 357A are in contact with each other, the mounting portions 358A and 360A are attached to the bolts 64 And then air is injected into the tubes 150A, 152A.

The third modification also shows substantially the same effect as the first embodiment. Further, in a third modification, the tube assemblies 355A, 357A can be fitted directly into the grooves 16C of the motor housing 16. [ Specifically, the tube assemblies 355A, 355B are mounted on the housing 12 from one end thereof to a specific location on the motor housing 16 (e.g., from the bottom wall 16B to the groove 16C of the motor housing 16) 357A). Thus, the tube assemblies 355A, 357A can be mounted on the housing 12 regardless of the contour of the housing 12, which does not reduce the design freedom of the housing 12. [ The maximum outer diameter of the housing 12 between one end of the housing 12 and a particular location in which the tube assembly is fitted can be greater than the inner diameter of the tube assembly when the tube and rim are integrated into a single portion of a substantially annular shape , Which reduces the degree of freedom of design of the housing 12. [ However, the above-described configuration of the third modification does not reduce the degree of freedom of design of the housing 12. [

Third Embodiment

A third embodiment of the present invention will now be described with reference to Fig. The third embodiment is different from the first embodiment in that the tube 50A is disposed between the motor housing 16 and the engine 60. [ Specifically, the rim 454A is disposed to extend over a portion of the outer periphery of the tube 50A. The rim 454A has a mounting portion 458A at the top and bottom shown in Fig. The housing 12 is fixed to the engine 60 by fixing the mounting portion 458A to the projection portion 62 of the engine 60 by the bolts 64. [ The remaining portion of the outer peripheral edge of the tube 50A not covered by the rim 454A is located in the concave space formed by the surface of the engine 60 and the two projections 62 of the engine 60. [ In the concave space, the tube 50A comes into surface contact with the engine 60 at a portion of the inner surface of each protrusion 62 facing each other and at a portion of the bottom of the concave space. The contact between the engine 60 and the housing 12 is prevented by the tube 50A interposed therebetween. A procedure for assembling the tube 50A and the rim 454A to the motor housing 16 will be described. A tube 50A is mounted on the inner periphery of the rim 454A to form a tube assembly 455A and the tube assembly 455A is assembled by mounting the tube assembly 455A onto the motor housing 16 from the bottom wall 16B And is fitted into the groove 16C of the motor housing 16. Subsequently, the mounting portion 458A is fixed to the projecting portion 62 of the engine 60 by the bolt 64, and the tube 50A is expanded by the air. When the air pressure of the tube 50A reaches a value within a certain range, the tube 50A comes into surface contact with the engine 60 at a portion of the inner surface of the protruding portion 62 facing each other and at the bottom of the concave space.

The third embodiment also shows substantially the same effect as the first embodiment. In addition, in the third embodiment in which the tube 50A comes into contact with the wall of the engine 60, the housing 12 is supported by the walls of the engine 60 as well as the rim 454A. According to the configuration of the third embodiment, the circumferential dimension of the rim 454A can be reduced, and the amount of material for manufacturing the rim 454A can be reduced accordingly as the firm support for the housing 12 is maintained have.

Fourth Modification

A fourth modification of the present invention will now be described with reference to Fig. In the following description of the fourth modification, only differences from the third embodiment will be described, and a detailed description of the configuration common to the third embodiment will be omitted. The fourth modification is different from the third embodiment in the structure of the tube. Specifically, in a fourth modification, a substantially arcuate tube 450A is disposed between the rim 454A and the motor housing 16, and a substantially arcuate tube 452A is disposed between the engine 60 and the motor housing 16). The tube 452A is in surface contact with the engine 60 at a portion of the inner surface of each of the protrusions 62 facing each other and the bottom of the concave space.

The procedure for assembling the tubes 450A and 452A and the rim 454A to the motor housing 16 will be described. The tube 452A in which air has been removed in advance is fitted into the groove 16C of the motor housing 16. [ Specifically, the tube 452A is arranged on the right half of the groove 16C of the motor housing 16 when viewed in the axial direction of the housing 12 from the side of the bottom wall 16B, (The right side of the outer periphery of the motor housing 16 in Fig. 12). Subsequently, the housing 12 to which the tube 452A is mounted is set in the concave space formed between the two projections 62 of the engine 60. [ Thereafter, the tube 452A is inflated by air. Thereby, the expanded tube 452A comes into surface contact with the engine 60 at the above-mentioned three portions. The tube 450A is fixed to the inner periphery of the rim 454A to form a tube assembly, and the tube assembly is fitted to the left portion of the groove 16C as shown in Fig. The mounting portion 458A of the rim 454A is fixed to the engine 60 by bolts 64 and the tube 450A is inflated by injecting air into the interior. The fourth modified example also shows substantially the same effect as the third embodiment. The tube 450A of the fourth embodiment is relatively short in the circumferential direction and therefore can be easily attached to the rim 454A. Thus, the tube assembly and tube 452A are substantially arcuate in shape and therefore can be fitted directly into the groove 16C, which does not reduce the design freedom of the housing 12. [ The number of tubes disposed between the engine 60 and the motor housing 16 is not limited to one, and two or more tubes may be used.

Fourth Embodiment

A fourth embodiment of the present invention will now be described with reference to Fig. The fourth embodiment differs from the first embodiment in the configuration of the rim. Specifically, in the fourth embodiment, two substantially arcuate rims 554A and 556A are disposed on the outer circumferential edge of the annular tube 50A. Rims 554A and 556A are located on the same circumference of tube 50A. 13, the rim 554A is disposed on top of the motor housing 16 and the rim 556A extends below the motor housing 16 (i.e., across the motor housing 16 to the rim 554A ) Side). That is, some portions of the outer peripheral surface of the tube 50A of the fourth embodiment are exposed without being covered by the rim. Rims 554A and 556A have mounting portions 558A and 560A, respectively. The mounting portions 558A and 560A are fixed to the engine 60 by bolts 64. [ Thus, the housing 12 supported by the rims 554A, 556A is secured to the engine 60.

The procedure for assembling the tube 50A and the rims 554A and 556A will be described. The tube 50A is secured to the inner periphery of the rims 554A and 556A, respectively, to form the tube assembly 555A. The tube assembly 555A fits over the motor housing 16 from the bottom wall 16B and fits into the groove 16C. The tube 50A is inflated by air and the mounting portions 558A and 560A are fixed to the engine 60 by the bolts 64. [ The fourth embodiment also exhibits substantially the same effect as the first embodiment. In a fourth embodiment in which the rims 554A and 556A are disposed on opposite sides of the housing 12, the housing 12 held by the rims 554A and 556A from the outside is stably supported. The exposed portion of the outer circumferential edge of the tube 50A may be configured to contact the engine 60.

Fifth Modification

A fifth embodiment of the present invention will now be described with reference to Fig. In the fifth modification, only a different part from the fourth embodiment will be described, and a detailed description of the common configuration and the fourth embodiment will be omitted. The fifth modification is different from the fourth embodiment in the structure of the tube. Specifically, in a fifth modification, a substantially arcuate tube 650A is disposed between the rim 554A and the motor housing 16, and a substantially arcuate tube 652A is disposed between the rim 556A and the motor housing 16). The tubes 650A and 652A have substantially the same shape and the lengths of the tubes 650A and 652A in the circumferential direction are substantially the same as the lengths of the rims 554A and 556A in the circumferential direction. The procedures for assembling the tubes 650A and 652A and the rims 554A and 556A to the motor housing 16 will be described. The tubes 650A and 652A are first secured to the inner periphery of the rims 554A and 556A thereby forming the tube assemblies 655A and 657A, respectively. The tube assemblies 655A and 657A fit into the grooves 16C of the motor housing 16 and the tube assemblies 655A and 657A hold the motor housing 16 therebetween. The tubes 650A and 652A are inflated by air and the mounting portions 558A and 560A of the rims 554A and 556A are fixed to the engine 60 by the bolts 64. [ The fifth modification also shows substantially the same effect as the fourth embodiment. In addition, the substantially circular arc-shaped tube assemblies 655A, 657A can thus fit directly into the groove 16C, which does not reduce the design freedom of the housing 12. [

Fifth Embodiment

A fifth embodiment of the present invention will now be described with reference to Fig. The fifth embodiment differs from the first embodiment in the cross-sectional shape and the configuration of the tube and the rim. The tube 750A of the fifth embodiment differs from the tube 50A having a hollow, substantially annular cross-section, in that the tube 750A has a substantially C-shaped cross-section having an opening 700 that opens toward the opposite side of the motor housing 16 in the radial direction of the cross- Respectively. The opening 700 is formed extending along the entire circumference of the tube 750A. The rim 754A covers the opening 700 such that the entire opening 700 is airtight and liquid tight. The tube 750A and rim 754A form a substantially annular, hollow tube assembly 755A. The inside of the tube assembly 755A is surrounded and sealed from the outside. The tube assembly 755A is filled with air. Air is injected into tube assembly 755A through valve 752A attached to rim 754A. The air pressure of the tube assembly 755A can be maintained within a certain range by periodically refilling the tube assembly 755A with air. With the air pressure of the tube assembly 755A held within a certain range, the motor housing 16 does not contact the rim 754A due to the interposition of the tube 750A. The procedure for assembling the tube assembly 755A to the motor housing 16 is substantially the same as that of the first embodiment. Note that the tube 750A corresponds to the example of the second vibration damper of the present invention. The fifth embodiment also shows substantially the same effect as the first embodiment. Also, the configuration according to the fifth embodiment does not require protrusions or grooves for fixing the tube 750A to the rim 754A. The configuration according to the fifth embodiment facilitates the manufacture of the rim 754A and the tube 750A.

Although embodiments of the present invention have been described in detail, these embodiments are merely examples, and a motor-driven compressor according to the present invention can be variously modified within the scope of the present invention.

For example, the tube is filled with air in the above embodiment and variations. However, the configuration of the tube is not limited to this. The tube can be filled with any medium that provides excellent vibration absorption and is less heated by vibration than the material used for the tube. The vibration absorbing medium used for the tube includes a gas such as nitrogen, a liquid such as ethylene glycol or propylene glycol, a gel, or a silicone resin.

Tubes 50A and 50B need not necessarily have an annular shape and may have an elliptical or rectangular cross-section as long as the shape conforms to the contour of housing 12. The housing 12 need not necessarily have a cylindrical shape, but may have an elliptical cylindrical shape, for example. The tubes 50A and 50B may not fit around the circumferential periphery of the housing 12 and may extend in the axial direction from the periphery of the motor housing 16 and the opposite longitudinal ends of the housing 12 That is, the end of the discharge housing 20 and the bottom wall 16B of the motor housing 16).

The protrusions 56A and 56B and the grooves 51A and 51B are not necessarily formed in the annular rim 54A or 54B so long as the rims 54A and 54B are kept from being displaced from the tubes 50A and 50B due to the vibration of the engine 60. [ , 54B and the entire periphery of the outer periphery of the tubes 50A, 50B, respectively. Rims 54A and 54B may be secured to any other component other than engine 60, such as any vehicle frame.

The seat 70 of the second modification is applicable to a motor-driven compressor in which two or more substantially arcuate tubes are fitted in the grooves 16C, 16D of the motor housing 16. [ Specifically, the seat 70 can be disposed on the outer peripheral edge of the tube of the motor-driven compressor according to the third modification (Fig. 10), the fourth modification (Fig. 12), and the fifth modification (Fig. This is also applicable to the tube 452A used in the fourth modification. The sheet 70 may be configured to be secured to the outer periphery of the tube by engagement of a plurality of grooves formed in one of the tubes and the sheet 70 and a plurality of projections formed on the other one of the tubes 70 . The sheet 70 does not necessarily have to be disposed in every tube. For example, the sheet 70 can be used only for tubes that tend to be relatively easy to degrade or relatively to tubes that allow air to be released relatively easily.

In the second embodiment, the tube 50A is fitted over the motor housing 16 and the rims 354A and 356A are mounted on the tube 50A. However, the assembly order is not limited thereto. The assembling procedure is such that the wide surface of the mounting portion 358A of the rim 354A and the wide surface of the mounting portion 360A of the rim 356A are in contact with each other and the tube 50A, The tube assembly formed by fixing to the inner periphery is mounted to the motor housing 16 and the mounting portions 358A and 360A are fixed to the engine 60 by the bolts 64 and then the tube 50A is inflated Lt; / RTI >

Further, in the third modification, the tube assemblies 355A and 357A prepared in advance are assembled to the motor housing 16. [ However, the assembly order is not limited thereto. For example, the assembly procedure may be such that the tube 150A, 152A fits into the groove 16C of the motor housing 16 and is then inflated by air and the rims 354A, And the mounting portions 358A and 360A can be fixed to the engine 60 by the bolts 64. [

In the fourth embodiment, the tube assembly 555A is prepared and assembled to the motor housing 16. However, the assembly order is not limited thereto. For example, the assembly sequence may be such that tube 50A is set in motor housing 16 and inflated by air, rims 554A and 556A are mounted on the periphery of tube 50A, and mounting portions 558A and 560A And can be made to be fixed to the engine 60 by the bolts 64.

In the fifth embodiment, a single tube 750A is disposed between the rim 754A and the motor housing 16. However, the number of the tubes 750A is not limited to one, and two or more arc-shaped tubes may be used. In this case, each tube is closed at the circumferential opposite ends, and the space surrounded by the tube and rim 754A is sealed from the outside.

Specific embodiments of the invention have been described in detail. However, these embodiments are merely examples and are not intended to limit the scope of the invention. The embodiments disclosed herein can be variously modified. The technical elements disclosed in this specification and the drawings show technical merit when used alone or in various combinations, and thus are not limited to the combination examples disclosed herein. The techniques illustrated in the present specification and drawings are for the purpose of achieving a number of objectives at the same time, and therefore achieving one of the objectives represents a technical utility.

Claims (14)

An electric compressor,
A compression section,
A motor for driving the compression unit,
A cylindrical housing for housing the compression unit and the motor therein,
A support member configured to support the housing and to be fixed to an object to which the electric compressor is attached,
And a first vibration damper disposed between the housing and the support member,
The first vibration damper keeps the housing in a non-contact state with the support member and the object,
Wherein the first vibration damper has a hollow surrounding space therein. The method according to claim 1,
Wherein the first vibration damper has an annular shape extending around the periphery of the housing. The method according to claim 1,
Wherein the support member has an annular shape extending around the periphery of the housing. The method of claim 3,
And an inner peripheral portion of the support member is configured to fix the outer peripheral edge of the first vibration damper thereon. The method according to claim 1,
The motor-driven compressor includes a plurality of support members,
Each support member having an arcuate shape and disposed around the housing. 6. The method of claim 5,
And an inner peripheral portion of the support member is configured to fix the outer peripheral edge of the first vibration damper thereon. 3. The method of claim 2,
The first vibration damper is in contact with both the housing and the object, at least in part,
Wherein the first vibration damper keeps the housing in non-contact with the object. The method according to claim 1,
The first vibration damper is disposed between the housing and the object,
Wherein the first vibration damper keeps the housing in non-contact with the object. The method according to claim 1,
The first vibration damper is filled with a gas or a liquid,
Wherein the first vibration damper is configured such that a gas or a liquid is injectable. 10. The method of claim 9,
The air compressor is an air compressor. The method according to claim 1,
The concave portion is formed on one of the outer circumferential edge of the first vacuum damper and the inner circumferential portion of the support member,
The projecting portion is formed on the other one of the outer circumferential edge of the first vacuum damper and the inner circumferential portion of the support member,
And the recesses and the protrusions are configured to be fitted to each other. 12. The method of claim 11,
The motor-driven compressor further includes an auxiliary vibration damper disposed between the first vibration damper and the support member,
The auxiliary vibration damper is capable of contacting the housing when the first vibration damper is deformed,
Wherein the auxiliary vibration damper keeps the housing in non-contact with the support member and the object when the first vibration damper is deformed. The method according to claim 1,
A groove is provided in the outer peripheral edge of the housing,
And the first vibration damper is fitted in the groove. An electric compressor,
A compression section,
A motor for driving the compression unit,
A cylindrical housing for housing the compression unit and the motor therein,
A support member configured to support the housing and to be fixed to an object to which the motor-driven compressor is attached, and
And a second vibration damper extending along the outer periphery of the housing and disposed between the housing and the support member,
The second vibration damper keeps the housing in a non-contact state with the support member,
The second vibration damper has a C-shaped cross section having an opening that opens in a radial direction of the cross section toward the side opposite to the housing, as viewed along a plane orthogonal to the extending direction of the second vibration damper,
And the support member covers the opening in an air-tight and liquid-tight manner to seal the space surrounded by the support member and the second vibration damper.

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