Vehicle-mounted electric fluid machine

Abstract

Provided is an electric fluid machine for a vehicle that can suppress damage to a vibration-proof elastic member. A vibration-proof elastic member (41) of an electric compressor for a vehicle is disposed in a non-bonded state with respect to a sleeve (31) and a flange (33) on a mounting leg (14). The flange (33) has a ridge portion (34) that protrudes toward the mounting leg (14) and is disposed with a prescribed gap to the radial outside of an eave portion (43). The ridge portion (34) and the eave portion (43) come into contact with each other at the time of vibration of the housing, thereby prescribing a deformation limit of the vibration-proof elastic member (41).

Description

Technical Field

[0001] This invention relates to vehicle-mounted electrofluid machinery. Background Technology

[0002] An example of an electric compressor for vehicle use is an electric compressor mounted on a vehicle. For this mounting, the electric compressor has mounting legs on its housing. The electric compressor is mounted on the vehicle by fastening a fastening connection member inserted into the mounting legs and then fastened to the vehicle. Furthermore, to prevent vibrations generated by the electric compressor during the operation of the electric motor from being transmitted to the vehicle, the electric compressor has a vibration-damping elastic member.

[0003] In the mounting structure of the electric compressor disclosed in Patent Document 1, such as Figure 6 As shown, a fastening bolt 92, serving as a fastening connecting member, is inserted into the mounting foot 90 of the electric compressor and the mounting component 91 on the engine side. The shaft portion 92a of the fastening bolt 92 is screwed into the mounting component 91. A first gap adjustment portion 93, which is plastically deformed due to pressure from the screwing in of the fastening bolt 92, is disposed between the head 92b of the fastening bolt 92 and one end face of the mounting foot 90 as a vibration-damping elastic member. Furthermore, a second gap adjustment portion 94, which is plastically deformed due to pressure from the screwing in of the fastening bolt 92, is disposed between the other end face of the mounting foot 90 and the mounting component 91 as a vibration-damping elastic member.

[0004] Furthermore, in the mounting structure of the electric compressor disclosed in Patent Document 1, pressing pads 95 are provided between the first gap adjustment part 93 and the head 92b, and between the second gap adjustment part 94 and the assembly member 91. A collar part 96 made of a metal tube is inserted into the mounting foot 90.

[0005] The first gap adjustment part 93 and the second gap adjustment part 94 each integrally have cylindrical portions 93a and 94a and eaves portions 93b and 94b. The cylindrical portions 93a and 94a are disposed between the outer peripheral surface of the collar portion 96 and the inner peripheral surface of the mounting foot 90. The eaves portion 93b of the first gap adjustment part 93 is disposed between the pressing pad 95 and one end face of the mounting foot 90, and the eaves portion 94b of the second gap adjustment part 94 is disposed between the pressing pad 95 and the other end face of the mounting foot 90.

[0006] The vibration component of the electric compressor housing that is parallel to the axis of the fastening bolt 92 is attenuated by the eaves 93b and 94b. Furthermore, the vibration component that is orthogonal to the axis of the fastening bolt 92 is attenuated by the cylinder portions 93a and 94a.

[0007] Existing technical documents

[0008] Patent documents

[0009] Patent Document 1: Japanese Patent Application Publication No. 2010-138808 Summary of the Invention

[0010] The problem that the invention aims to solve

[0011] Under the vibration of the electric compressor housing, the eaves 93b and 94b elastically deform in a direction orthogonal to the axis of the fastening bolt 92. At this time, the further the eaves 93b and 94b elastically deform radially outward, the greater the stress concentration near the boundary between the eaves 93b and 94b and the cylinders 93a and 94a. As a result, damage may occur near the boundary between the eaves 93b and 94b and the cylinders 93a and 94a.

[0012] Solution for solving the problem

[0013] The main purpose of the vehicle-mounted electrofluid machinery for solving the above-mentioned problems is to include: a housing that internally houses an electric motor and has mounting legs with through holes formed on each end face in the axial direction; a fastening connection member having a shaft portion that inserts into the through holes, and having a head at one end of the shaft portion, the other end of the shaft portion being fastened to a mounting object to mount the mounting leg to the mounting object; a sleeve disposed between the mounting leg and the shaft portion, and bearing the fastening connection force from the head; and vibration-damping elastic members disposed on both sides of the mounting leg in the axial direction, and having a core within the mounting leg. A cylindrical portion disposed between the circumferential surface and the outer circumferential surface of the sleeve, and an eave extending radially outward from one end of the cylindrical portion toward the outer side of the cylindrical portion; and an annular plate that allows the fastening force borne by the sleeve to act on the mounting leg via the eave, the vibration-damping elastic member being disposed on the mounting leg in a non-adhesive state relative to the sleeve and the annular plate, the annular plate having a protruding rib that protrudes toward the mounting leg and is disposed radially outward from the eave at a predetermined gap, the protruding rib abutting against the eave during vibration of the housing, thereby defining the deformation limit of the eave.

[0014] Accordingly, when the housing vibrates in conjunction with the operation of the electric motor, the vibration-damping elastic member is input with vibration components. Consequently, pressure is applied to the eaves between the annular plate and the mounting leg, causing the eaves to elastically deform radially outward. At this time, the eaves abut against the protruding rib, thus defining the deformation limit of the vibration-damping elastic member. Therefore, excessive elastic deformation of the eaves radially outward is suppressed. As a result, stress concentration near the boundary between the cylindrical section and the eaves is reduced, thereby suppressing damage near the boundary between the cylindrical section and the eaves.

[0015] Regarding vehicle-mounted electro-hydraulic machinery, the convex portion may have a protruding end face at its front end in the protruding direction from the annular plate toward the mounting leg, and the protruding end face separates from the end face of the mounting leg when the convex portion has abutted against the eaves.

[0016] Therefore, even if the eaves are compressed and thinned, the protruding end face will not abut against the end face of the mounting leg. Thus, no noise caused by the protruding part abutting against the mounting leg will be generated.

[0017] Regarding vehicle-mounted electrofluid machinery, the sleeve may also have a flange extending radially from an end in the axial direction of the sleeve, and the annular plate may be formed by the flange.

[0018] Accordingly, the protruding part and the flange can be provided on the sleeve. Therefore, by inserting the sleeve through the insertion hole of the mounting leg, the protruding part can be provided on the mounting leg together with the flange.

[0019] In the case of vehicle-mounted electrofluid machinery, the annular plate may also be a washer.

[0020] Therefore, by providing a raised strip in the washer that suppresses loosening of the head, excessive elastic deformation of the eaves can be suppressed without increasing the number of parts.

[0021] Invention Effects

[0022] According to the present invention, damage to the vibration-damping elastic component can be suppressed. Attached Figure Description

[0023] Figure 1 This is an exploded perspective view showing the vehicle-mounted electric compressor and vibration damping device.

[0024] Figure 2 (a) is a cross-sectional view showing the mounting structure of the mounting leg. Figure 2 (b) is an enlarged sectional view showing the eaves and the raised section.

[0025] Figure 3 It is a perspective view showing the vibration-damping elastic component and the sleeve.

[0026] Figure 4 This is a cross-sectional view showing the vibration damping device during vibration.

[0027] Figure 5 This is a cross-sectional view showing other examples of vibration damping devices.

[0028] Figure 6 This is a diagram illustrating the background technology.

[0029] Explanation of reference numerals in the attached figures

[0030] 10: Vehicle-mounted electric compressor as an electric fluid machinery for vehicles; 11: Housing; 12: Electric motor; 14: Mounting leg; 14a: First end face; 14b: Second end face; 15: Through hole; 21: Fastening connecting structure; 22: Shaft; 23: Head; 31: Sleeve; 33: Flange as an annular plate; 34, 45: Protruding strip; 34d: Protruding end face; 41: Vibration-damping elastic member; 42: Cylindrical part; 43: Eaves; 44: Washer as an annular plate; 50: Mounting object. Detailed Implementation

[0031] The following is in accordance with Figures 1-5 This describes one embodiment of an on-board electrofluidic machine as an on-board electric compressor. The on-board electric compressor is used in vehicle air conditioning systems.

[0032] like Figure 1 As shown, the vehicle-mounted electric compressor 10 includes a housing 11, an electric compression mechanism (not shown) including an electric motor 12, and a vibration damping device 20. The housing 11 has a cylindrical receiving portion 13 and a plurality of mounting legs 14. The plurality of mounting legs 14 are provided for mounting the housing 11 on a part of a vehicle (not shown), namely a mounting object 50. The electric compression mechanism including the electric motor 12 is housed inside the receiving portion 13. That is, the housing 11 houses the electric motor 12 inside.

[0033] In addition to the electric motor 12, the electric compressor mechanism includes a rotating shaft, a compression section connected to the end of the rotating shaft, and an inverter (illustrated separately). The housing 11 has an intake port for drawing in refrigerant (as a fluid) and an outlet port for discharging refrigerant. The rotating shaft is supported on the housing 11 in a rotatable state. In the electric compressor mechanism, the rotating shaft is driven to rotate by the electric motor 12. As the rotating shaft rotates, the refrigerant drawn into the housing 11 from the intake port is compressed, and the compressed refrigerant is discharged from the outlet port out of the housing 11.

[0034] The multiple mounting legs 14 are cylindrical. The central axis L of the mounting legs 14 extends in the same direction as the axis X of the mounting legs 14. The central axis L of the multiple mounting legs 14 is orthogonal to the axis M of the receiving portion 13. The multiple mounting legs 14 are arranged in the receiving portion 13 in a manner parallel to each other's central axes L. Since the multiple mounting legs 14 have the same structure, the following description focuses on one mounting leg 14, omitting the description of the remaining two mounting legs 14.

[0035] like Figure 2As shown in (a), a through hole 15 is formed in the mounting leg 14. The through hole 15 passes through the mounting leg 14 along the axial direction X. The through hole 15 includes large-diameter holes 15a on both sides of the mounting leg 14 in the axial direction X and a small-diameter hole 15b located between the two large-diameter holes 15a. The mounting leg 14 has an annular surface 16 connecting the inner circumferential surface of the large-diameter hole 15a and the inner circumferential surface of the small-diameter hole 15b.

[0036] The mounting leg 14 has a first end face 14a at a first end in the axial direction X, and a second end face 14b at a second end in the axial direction X. The first end face 14a and the second end face 14b are each annular surfaces surrounding the insertion hole 15. Therefore, the insertion hole 15 is formed on the first end face 14a and the second end face 14b of the mounting leg 14.

[0037] The through hole 15 opens on the first end face 14a and the second end face 14b of the mounting leg 14. The first end face 14a and the second end face 14b are flat surfaces orthogonal to the central axis L. The vehicle-mounted electric compressor 10 is mounted to the mounting object 50 such that the second end face 14b of the mounting leg 14 is adjacent to the mounting object 50. It should be noted that the mounting object 50 has an internal thread 52 extending along the axial direction X from the adjacent surface 51 adjacent to the second end face 14b of the mounting leg 14.

[0038] Next, the vibration damping device 20 will be described. It should be noted that the vibration damping device 20 is located on both the first end face 14a and the second end face 14b of the mounting leg 14. Both vibration damping devices 20 have the same structure. Therefore, the structure of one vibration damping device 20 will be described, while the structure of the other vibration damping device 20 will be omitted.

[0039] like Figure 1 , Figure 2 (a) and Figure 3 As shown, the vibration damping device 20 is provided on both ends of the mounting leg 14 by fastening the fastening connection member 21, which is made of bolts, to the mounting object 50.

[0040] The fastening connecting member 21 is made of metal. The fastening connecting member 21 has a shaft portion 22 that inserts into the through hole 15, and a head 23 at one end of the shaft portion 22. An external thread 22a is provided on the outer peripheral surface of the other end of the shaft portion 22. The fastening connecting member 21 fastens the external thread 22a at the other end of the shaft portion 22 to the internal thread 52 of the mounting object 50, thereby mounting the mounting leg 14 to the mounting object 50.

[0041] The vibration damping device 20 has a sleeve 31, a flange 33 as an annular plate, a raised strip 34, and a vibration damping elastic member 41.

[0042] The sleeve 31 is made of metal. The sleeve 31 is cylindrical. In addition, the sleeve 31 is integral with the metal flange 33. The flange 33 extends radially from the end of the sleeve 31 in the axial direction.

[0043] The outer diameter of the sleeve 31 is smaller than the diameter of the small-diameter hole 15b. The sleeve 31 is inserted into the insertion hole 15 of the mounting leg 14. The sleeve 31 has a sleeve hole 32. The sleeve hole 32 passes through the sleeve 31 along the axial direction. The shaft portion 22 of the fastening connecting member 21 is inserted into the sleeve hole 32. Therefore, the shaft portion 22 of the fastening connecting member 21 passes through the sleeve 31. Thus, the sleeve 31 is disposed between the outer peripheral surface of the shaft portion 22 and the inner peripheral surface of the mounting leg 14. That is, the sleeve 31 is disposed between the mounting leg 14 and the shaft portion 22.

[0044] Flange 33 extends in a circular plate shape from one end of sleeve 31 along its axial direction. Sleeve 31 and flange 33 are made of the same metal. Flange 33 is a circular plate with a sleeve hole 32 in the center. Flange 33 has a first abutment surface 33a on a first surface in the thickness direction and a second abutment surface 33b on a second surface in the thickness direction. The first abutment surface 33a is an annular surface connected to the outer peripheral surface of sleeve 31. The second abutment surface 33b is an annular surface located on the side opposite to the first abutment surface 33a.

[0045] The flange 33 has a protruding rib 34 projecting from the flange toward the mounting leg 14. The protruding rib 34 is cylindrical and concentric with the sleeve 31. Figure 2 As shown in (b), the inner peripheral surface 34a of the protruding strip 34 intersects with and is connected to the first abutting surface 33a.

[0046] like Figure 2 (a) and Figure 3 As shown, the shortest distance between the inner circumferential surface 34a of the protruding part 34 and the outer circumferential surface 31a of the sleeve 31 is defined as the separation distance K of the protruding part 34. The separation distance K of the protruding part 34 is constant in the circumferential direction of the flange 33.

[0047] The outer peripheral surface 34b of the protruding portion 34 intersects with and is connected to the second abutment surface 33b. The protruding portion 34 has a protruding end face 34d at its front end in the projection direction from the flange 33 toward the mounting leg 14. The protruding end face 34d is an annular surface.

[0048] The vibration damping elastic member 41 is made of an elastic material. An example of an elastic material is rubber. The vibration damping elastic member 41 prevents vibration from being transmitted to the vehicle via the housing 11 by attenuating the vibration of the housing 11 generated by the operation of the electric motor 12.

[0049] The vibration-damping elastic member 41 has a cylindrical portion 42 and a plate-shaped eaves 43. The outer diameter of the cylindrical portion 42 is smaller than the diameter of the large-diameter hole 15a. Furthermore, the inner diameter of the cylindrical portion 42 is smaller than the diameter of the small-diameter hole 15b. The cylindrical portion 42 has a through hole 42a. The through hole 42a passes through the vibration-damping elastic member 41 along its axial direction. The end of the cylindrical portion 42 opposite to the end where the eaves 43 are located in the axial direction has a front end face 42b. The axial dimension of the cylindrical portion 42 is smaller than the axial dimension of the sleeve 31.

[0050] The eaves 43 extends radially outward from the end opposite to the front end face 42b of the cylindrical portion 42 along its axial direction. The eaves 43 is a circular plate with a centrally located through hole 42a. The eaves 43 has a first clamping surface 43a on a first surface in the thickness direction. The eaves 43 has a second clamping surface 43b on a second surface in the thickness direction. The first clamping surface 43a is an annular surface connected to the outer peripheral surface of the cylindrical portion 42. The first clamping surface 43a abuts against the end face of the mounting leg 14. The second clamping surface 43b is an annular surface located on the side opposite to the first clamping surface 43a.

[0051] The second clamping surface 43b is the surface that the first abutting surface 33a of the flange 33 abuts against. The shortest distance from the inner peripheral surface 43c of the eaves 43 to the outer peripheral surface 43d is defined as the width R of the eaves 43. The width R of the eaves 43 is smaller than the separation distance K from the outer peripheral surface 31a of the sleeve 31 to the inner peripheral surface 34a of the protrusion 34. It should be noted that, in the first end face 14a and the second end face 14b of the mounting leg 14, the shortest distance from the inner peripheral surface of the through hole 15 to the outer peripheral surface of the mounting leg 14 is larger than the width R of the eaves 43.

[0052] Next, the mounting structure of the mounting leg 14 equipped with the vibration damping device 20 will be described.

[0053] like Figure 2 As shown in (a), on the second end face 14b side of the mounting leg 14, a cylindrical portion 42 of the vibration-damping elastic member 41 is inserted through the large-diameter hole 15a of the mounting leg 14. The front end face 42b of the cylindrical portion 42 abuts against the annular surface 16 on the second end face 14b side. In addition, the first clamping surface 43a of the eaves 43 abuts against the second end face 14b of the mounting leg 14. It should be noted that the outer peripheral surface 43d of the eaves 43 is located inside the outer peripheral surface of the mounting leg 14.

[0054] A sleeve 31 is inserted through the insertion hole 42a of the vibration damping elastic member 41. Therefore, a cylindrical portion 42 of the vibration damping elastic member 41 is disposed between the inner circumferential surface of the mounting leg 14 and the outer circumferential surface of the sleeve 31. The sleeve 31 extends beyond the front end face 42b of the cylindrical portion 42 and penetrates deep into the mounting leg 14. The first abutting surface 33a of the flange 33 abuts against the second clamping surface 43b of the eaves 43. The second abutting surface 33b of the flange 33 abuts against the adjacent surface 51 of the mounting object 50. Furthermore, the vibration damping elastic member 41, the sleeve 31, and the flange 33 are not bonded to each other and are capable of relative movement in the axial and radial directions. Therefore, the vibration damping elastic member 41 is disposed on the mounting leg 14 in a non-bonded state relative to the sleeve 31 and the flange 33.

[0055] like Figure 2 As shown in (b), the inner surface of the protruding rib 34, i.e., the inner peripheral surface 34a, is separated from the outer peripheral surface 43d of the eaves 43. That is, the flange 33 has a protruding rib 34 provided radially outward from the eaves 43 with a predetermined gap S. Therefore, an annular gap S is divided between the inner peripheral surface 34a of the protruding rib 34 and the outer peripheral surface 43d of the eaves 43. In addition, the protruding rib 34 protrudes from the flange 33 toward the mounting leg 14. The protruding end face 34d of the protruding rib 34 is separated from the second end face 14b of the mounting leg 14 in the axial direction X.

[0056] On the first end face 14a side of the mounting leg 14, a cylindrical portion 42 of a vibration-damping elastic member 41 is inserted through the large-diameter hole 15a of the mounting leg 14. The front end face 42b of the cylindrical portion 42 abuts against the annular surface 16 on the first end face 14a side. In addition, the first clamping surface 43a of the eaves 43 abuts against the first end face 14a of the mounting leg 14. It should be noted that the outer peripheral surface 43d of the eaves 43 is located inside the outer peripheral surface of the mounting leg 14.

[0057] A sleeve 31 is inserted through the insertion hole 42a of the vibration damping elastic member 41. Therefore, a cylindrical portion 42 of the vibration damping elastic member 41 is positioned between the inner circumferential surface of the mounting leg 14 and the outer circumferential surface of the sleeve 31. The sleeve 31 extends beyond the front end face 42b of the cylindrical portion 42 and penetrates deep into the mounting leg 14. The first abutting surface 33a of the flange 33 abuts against the second clamping surface 43b of the eaves portion 43.

[0058] The front end face of the sleeve 31 inserted from the first end face 14a side abuts against the front end face of the sleeve 31 inserted from the second end face 14b side within the mounting leg 14.

[0059] The inner peripheral surface 34a of the protruding rib 34 is separated from the outer peripheral surface 43d of the eaves 43. That is, the flange 33 has a protruding rib 34 provided radially outward from the eaves 43 with a predetermined gap S. Therefore, an annular gap S is formed between the inner peripheral surface 34a of the protruding rib 34 and the outer peripheral surface 43d of the eaves 43. In addition, the protruding rib 34 protrudes from the flange 33 toward the mounting leg 14. The protruding end face 34d of the protruding rib 34 is separated from the first end face 14a of the mounting leg 14 in the axial direction X.

[0060] The size of the radial gap S along the vibration damping elastic member 41 is set such that, when the vibration damping elastic member 41 is compressed in the axial direction and the eaves 43 extends radially outward, the deformation limit of the eaves 43 is specified, thereby suppressing excessive elongation of the eaves 43. The protruding part 34 is provided in such a way that it is spaced radially outward from the eaves 43 by a specified gap S, so that the deformation limit of the eaves 43 can be specified.

[0061] The shaft portions 22 of the fastening connecting members 21 are respectively inserted into the sleeve holes 32 of the two sleeves 31. The external thread 22a of the shaft portion 22 is fastened to the mounting object 50 by screwing it into the internal thread 52 of the mounting object 50. The sleeves 31 bear the fastening force from the head 23 of the fastening connecting members 21. In addition, the fastening force borne by the sleeves 31 is applied to the mounting leg 14 via the flange 33 and the eaves 43. As a result, the vibration damping elastic member 41 is compressed in the axial direction under the action of the fastening force from the head 23.

[0062] Therefore, the first clamping surface 43a abuts against the first end face 14a or the second end face 14b, and the second clamping surface 43b abuts against the first abutting surface 33a of the flange 33. Thus, the eaves 43 is clamped between the mounting leg 14 and the flange 33 in the axial direction X, and the eaves 43 is pressurized in the axial direction X. Additionally, the cylindrical portion 42 is pressurized between the annular surface 16 and the flange 33 in the axial direction X of the mounting leg 14.

[0063] Next, the function of the vehicle-mounted electric compressor 10 will be explained.

[0064] The housing 11 of the vehicle-mounted electric compressor 10 vibrates in conjunction with the operation of the electric motor 12. When the housing 11 vibrates, the vibration component parallel to the axis of the fastening connection member 21 is attenuated by the cylindrical portion 42 and the eaves 43 of the vibration-damping elastic member 41, while the vibration component orthogonal to the axis of the fastening connection member 21 is attenuated by the cylindrical portion 42. This prevents the vibration of the housing 11 from being transmitted to the installed object 50.

[0065] like Figure 4As shown, when the vibration damping elastic member 41 is input with a vibration component, the eaves 43 is compressed between the flange 33 and the end faces 14a and 14b of the mounting leg 14, causing the eaves 43 to elastically deform. At this time, the outer peripheral surface 43d of the eaves 43, which has elastically deformed radially outward, abuts against the inner peripheral surface 34a of the protruding strip 34, thereby defining the deformation limit of the eaves 43. As a result, the elongation of the eaves 43 is limited.

[0066] The following effects can be obtained according to this embodiment.

[0067] (1) The flange 33 has a raised rib 34 spaced radially outward from the eaves 43 by a predetermined gap S. Therefore, when the vibration damping elastic member 41 is input with a vibration component and the eaves 43 is compressed and elastically deformed, the eaves 43 is restricted from elongating radially outward by the contact between the elastically deformed eaves 43 and the raised rib 34. That is, the raised rib 34 can be used to prevent excessive elongation of the eaves 43 radially outward. Therefore, stress concentration near the boundary between the cylindrical portion 42 and the eaves 43 can be mitigated, and damage near the boundary between the cylindrical portion 42 and the eaves 43 caused by stress concentration can be suppressed. As a result, the reduction in the strength of the vibration damping elastic member 41 can be suppressed.

[0068] (2) Before a vibration component is input, a predetermined gap S exists between the outer peripheral surface 43d of the eaves 43 and the inner peripheral surface 34a of the protruding strip 34. Therefore, when a vibration component is input to the vibration damping elastic member 41, some elongation of the eaves 43 in the radial direction is allowed, and elastic deformation of the vibration damping elastic member 41 is allowed. Thus, the vibration damping function brought about by the elastic deformation of the vibration damping elastic member 41 can be effectively utilized.

[0069] (3) The size of the gap S along the radial direction of the vibration damping elastic member 41 is set to a size that can define the deformation limit of the eaves 43 when the eaves 43 extends radially outward. Therefore, when the vibration damping elastic member 41 is input with a vibration component, some extension of the eaves 43 to the radial outward is allowed, and excessive extension of the eaves 43 can be limited.

[0070] (4) The protruding end face 34d of the ridge portion 34 is separated from the first end face 14a or the second end face 14b of the mounting leg 14 in the axial direction X. Furthermore, even if the vibration-damping elastic member 41 is pressed in the axial direction, and the eaves 43 elongates and thins to abut against the ridge portion 34, the protruding end face 34d does not abut against the first end face 14a or the second end face 14b of the mounting leg 14. Therefore, no noise caused by the ridge portion 34 abutting against the mounting leg 14 will be generated.

[0071] (5) The protruding part 34 is provided on the entire circumference of the flange 33 and covers the outer peripheral surface 43d of the eaves 43 on the entire circumference. Therefore, the deformation limit of the eaves 43 can be limited on the entire circumference, and the local elongation of the eaves 43 can be suppressed. As a result, stress concentration caused by local deformation of the vibration damping elastic member 41 can be suppressed, and the reduction in endurance caused by damage to the vibration damping elastic member 41 can be suppressed.

[0072] (6) The vibration damping elastic member 41 is not bonded to the sleeve 31 and the flange 33. Therefore, the process of vulcanizing and bonding the vibration damping elastic member 41 to the sleeve 31 and the flange 33 is eliminated, thus reducing the cost of the vehicle-mounted electric compressor 10. In addition, since the vibration damping elastic member 41 is not bonded to the sleeve 31 and the flange 33, when a vibration component is input to the vibration damping elastic member 41, the eaves 43 extends radially outward, but the deformation limit of the eaves 43 in the radial direction can be specified by the ridge portion 34. Therefore, the cost of the vehicle-mounted electric compressor 10 is reduced, and the reduction in endurance caused by damage to the vibration damping elastic member 41 can be suppressed.

[0073] It should be noted that the above embodiments can be modified and implemented as follows. The above embodiments and the following modifications can be combined and implemented with each other within the scope of technical inconsistency.

[0074] ○ For example Figure 5 As shown, the flange 33 can also be removed from the sleeve 31. In this case, a washer 44, which serves as an annular plate, is disposed between one end face of the sleeve 31 in the axial direction and the head 23, and another washer 44, which serves as an annular plate, is disposed between the other end face of the sleeve 31 in the axial direction and the object to be mounted 50.

[0075] Furthermore, a raised portion 45 may be provided on the washer 44. The washer 44 has a through hole 44a in the center for the shaft portion 22 of the fastening connecting member 21 to be inserted. The raised portion 45 is provided along the outer periphery of the washer 44. The raised portion 45 may be provided on the entire circumference of the washer 44, or multiple raised portions 45 may be provided at intervals along the circumference of the washer 44.

[0076] Accordingly, by providing a protruding strip 45 on the washer 44 that suppresses loosening of the head 23 of the fastening connecting member 21, excessive elastic deformation of the eaves 43 can be suppressed without increasing the number of parts.

[0077] The raised strips 34 may also be provided at intervals in the circumferential direction of the flange 33. In this case, when the vibration damping elastic member 41 is input with a vibration component and the eaves 43 is compressed and elastically deformed, the outer peripheral surface 43d of the elastically deformed eaves 43 abuts against the inner surface of the raised strips 34.

[0078] If the eaves 43 abuts against the protruding strip 34 and a specified deformation limit is defined when a vibration component is input to the vibration damping elastic member 41, then the eaves 43 may abut against the protruding strip 34 before the vibration component is input. That is, the specified gap S between the eaves 43 and the protruding strip 34 becomes zero.

[0079] Alternatively, before the vibration component is input to the vibration damping elastic member 41, the protruding end face 34d of the convex part 34 abuts against the first end face 14a or the second end face 14b of the mounting leg 14.

[0080] ○The fluid that the vehicle-mounted electric compressor 10 compresses can be, for example, a fluid other than a refrigerant such as air.

[0081] ○ The on-board electric fluid machinery is not limited to the on-board electric compressor 10 which has a compression unit for compressing fluids. For example, in the case of a fuel cell vehicle, the on-board electric fluid machinery may also be an electric pump device that has a pump for supplying hydrogen to the fuel cell and an on-board electric motor for driving the pump.

Claims

1. A vehicle-mounted electric fluid machine characterized by comprising: have: The housing houses an electric motor and has mounting legs with through holes formed on each end face in the axial direction. A fastening connecting component has a shaft portion that inserts into the insertion hole, and a head at one end of the shaft portion, and the other end of the shaft portion is fastened to a mounting object to mount the mounting leg to the mounting object. A sleeve, which is disposed between the mounting leg and the shaft, and bears the fastening force from the head; A vibration-damping elastic member is disposed on both sides of the mounting leg in the axial direction, and has a cylindrical portion disposed between the inner circumferential surface of the mounting leg and the outer circumferential surface of the sleeve, and an eave extending radially from one end of the cylindrical portion toward the outer side of the cylindrical portion; and An annular plate that allows the fastening force borne by the sleeve to be applied to the mounting leg via the eaves. The vibration-damping elastic member is disposed on the mounting leg in a non-adhesive state relative to the sleeve and the annular plate. The annular plate has a raised rib portion that protrudes toward the mounting leg and is positioned radially outward from the eaves at a predetermined gap. When the housing vibrates, the length of the protruding part in the axial direction is longer than the length of the eaves in the axial direction, and the protruding part abuts against the eaves, thereby defining the deformation limit of the eaves.

2. The vehicle-mounted electrofluid machinery according to claim 1, wherein, The convex portion has a protruding end face at its front end in the protruding direction from the annular plate toward the mounting leg. When the convex portion and the eaves have abutted, the protruding end face separates from the end face of the mounting leg.

3. The vehicle-mounted electro-hydraulic machinery according to claim 1 or 2, wherein, The sleeve has a flange extending radially from an end in the axial direction of the sleeve, and the annular plate is formed by the flange.

4. The vehicle-mounted electrofluid machinery according to claim 1 or 2, wherein, The annular plate is a washer.

5. A vehicle-mounted electro-hydraulic machine, characterized in that, have: The housing houses an electric motor and has mounting legs with through holes formed on each end face in the axial direction. A fastening connecting component has a shaft portion that inserts into the insertion hole, and a head at one end of the shaft portion, and the other end of the shaft portion is fastened to a mounting object to mount the mounting leg to the mounting object. A sleeve, which is disposed between the mounting leg and the shaft, and bears the fastening force from the head; A vibration-damping elastic member is disposed on both sides of the mounting leg in the axial direction, and has a cylindrical portion disposed between the inner circumferential surface of the mounting leg and the outer circumferential surface of the sleeve, and an eave extending radially from one end of the cylindrical portion toward the outer side of the cylindrical portion; and An annular plate that allows the fastening force borne by the sleeve to be applied to the mounting leg via the eaves. The vibration-damping elastic member is disposed on the mounting leg in a non-adhesive state relative to the sleeve and the annular plate. The annular plate has a raised rib portion that protrudes toward the mounting leg and is positioned radially outward from the eaves at a predetermined gap. When the housing vibrates, the protruding part abuts against the eaves, thereby defining the deformation limit of the eaves. The convex portion has a protruding end face at its front end in the projection direction from the annular plate toward the mounting leg. When the convex portion is in contact with the eaves, the protruding end face separates from the end face of the mounting leg. The vibration-damping elastic component is a single piece.

6. The vehicle-mounted electrofluid machinery according to claim 5, wherein, The sleeve has a flange extending radially from an end in the axial direction of the sleeve, and the annular plate is formed by the flange.

7. The vehicle-mounted electrofluid machinery according to claim 5, wherein, The annular plate is a washer.

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