JP2005220854A - Motor-driven compressor mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor-driven compressor mounting structure, eliminating the need for largely differentiating corresponding portions of a vibration absorbing rubber from each other for every vibration component of a motor-driven compressor. <P>SOLUTION: A bolt 35 fixed to an engine E is inserted through a mounting hole 32 of the motor-driven compressor 11. The cylindrical vibration absorbing rubber 41 is arranged around the bolt 35. Abutting faces 44a, 48b are arranged on the side of the motor-driven compressor 11 and on the side of the engine E, respectively. The abutting face 48b on the side of the motor-driven compressor 11 and the abutting face 44a on the side of the engine E are arranged on the front and rear sides of the vibration absorbing rubber 41 in a direction along a center axis S of the bolt 35, and they abut on the vibration absorbing rubber 41. An end face 41b of the vibration absorbing rubber 41 on the side of the motor-driven compressor 11 is adhered to the abutting face 48b on the side of the motor-driven compressor 11, on which the end face 41b abuts, so that it is not relatively moved in the direction perpendicular to the center axis S of the bolt 35. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to, for example, an attachment structure for attaching an electric compressor to a vehicle in an electric compressor for compressing refrigerant constituting a vehicle air conditioner.

  In recent years, it has become common to perform so-called idling stop control in which an internal combustion engine (engine) in an idling state is automatically stopped when the vehicle is in a stopped state such as waiting for a signal in order to save the vehicle fuel consumption or to take environmental measures. The so-called eco-run car. Also in a so-called hybrid vehicle using an engine and an electric motor as a travel drive source, the engine is stopped when the vehicle is stopped.

  Therefore, an electric compressor using an electric motor as a drive source is adopted as a refrigerant compressor of the vehicle air conditioner so that air conditioning can be performed even when the engine is stopped. As the electric compressor, there is one in which an electric motor is integrated. The electric compressor is directly attached to the vehicle, for example, by being fixed to the engine.

  Here, in the configuration in which the electric compressor is directly fixed to the engine, the vibration of the electric compressor is transmitted to the vehicle interior via the engine, particularly when the electric compressor is operating in the engine stopped state. There is a problem that the noise itself acts as a diaphragm to increase noise outside the passenger compartment.

  In order to solve such a problem, the electric compressor is fixed to the engine via a vibration-proof rubber, and the vibration of the electric compressor is prevented from being transmitted to the engine side due to elastic deformation of the vibration-proof rubber. The technique which performs is proposed (for example, refer patent document 1).

  That is, as shown in FIG. 8, in the electric compressor 70, mounting legs 72 having mounting holes 72 a are provided outside the housing 71. A pipe 73 is inserted into the mounting hole 72a. A bolt 74 is inserted into the pipe 73, and the bolt 74 is fixed to a female screw portion 75 provided in the engine E. Anti-vibration rubbers 77 </ b> A and 77 </ b> B are disposed on the end of the mounting leg 72 on the engine E side and the end of the bolt 74 on the head 74 a side, respectively.

  The anti-vibration rubbers 77A and 77B are formed between the cylindrical portion 77a inserted outside the pipe 73 in the mounting hole 72a of the mounting leg 72, and between one end surface of the mounting leg 72 and the engine E outside the mounting hole 72a ( The anti-vibration rubber 77B on the head 74a side of the bolt 74 includes a flange portion 77b interposed between the other end surface of the mounting leg 72 and the head portion 74a.

Of the vibration of the electric compressor 70, the vibration component in the direction along the central axis S of the bolt 74 is transmitted to the engine E side by elastically deforming the flange portions 77b of the anti-vibration rubbers 77A and B. It is suppressed. Of the vibration of the electric compressor 70, the vibration component in the direction perpendicular to the central axis S of the bolt 74 is transmitted to the engine E side by elastic deformation of the cylindrical portions 77a of the vibration-proof rubbers 77A and 77B. It is suppressed.
JP 2000-130330 A (FIG. 2, pages 3-4)

  However, the anti-vibration rubbers 77A and 77B include a cylindrical portion 77a that shares a vibration component in a direction orthogonal to the central axis S of the bolt 74 and a flange that shares a vibration component in a direction along the central axis S of the bolt 74. A portion 77b is provided separately. Accordingly, there is a problem that the vibration isolating rubber 77A, B tends to increase in size in the direction along the center axis S of the bolt 74, and the work of inserting the pipe 73 into the vibration isolating rubber 77A, B becomes troublesome. Further, when the electric compressor 70 vibrates, stress tends to concentrate near the boundary between the cylindrical portion 77a and the flange portion 77b, and there is a problem in durability of the vibration isolating rubbers 77A and 77B.

  In addition, as an attachment structure of the electric compressor 70, there is a structure that does not have the pipe 73, that is, a structure in which the vibration isolating rubbers 77A and 77B are in direct contact with the bolt 74. In this case, for the same reason as described above, there has been a problem that it is difficult to insert the bolts 74 into the anti-vibration rubbers 77A and 77B.

  The objective of this invention is providing the attachment structure of the electric compressor which does not need to make the corresponding site | part of an anti-vibration rubber different for every vibration component of an electric compressor.

  In order to achieve the above object, according to the first aspect of the present invention, the contact surfaces are respectively provided on the electric compressor side and the mounting portion side of the vehicle to which the electric compressor is fixed. The contact surface on the electric compressor side and the contact surface on the attachment portion side are arranged in front of and behind the anti-vibration rubber in the direction along the central axis of the bolt and are in contact with the anti-vibration rubber, respectively. Therefore, of the vibration of the electric compressor, the vibration component in the direction along the central axis of the bolt is caused by the elastic deformation of the vibration-proof rubber, so that the contact surface on the electric compressor side and the contact surface on the mounting portion side are By relatively moving in the direction along the central axis of the bolt, transmission to the mounting portion side is suppressed.

  The end face on the electric compressor side of the anti-vibration rubber is connected so as not to move relative to the abutting face on the electric compressor side with which the end face abuts in a direction perpendicular to the central axis of the bolt. That is, when the electric compressor attempts to move relative to the vibration isolating rubber in a direction perpendicular to the central axis of the bolt, the vibration isolating rubber is deformed. Therefore, among the vibrations of the electric compressor, the vibration component in the direction orthogonal to the central axis of the bolt is also affected by the elastic deformation of the vibration isolating rubber, and the contact surface on the electric compressor side and the contact surface on the mounting portion side. Is relatively moved in a direction perpendicular to the central axis of the bolt, so that transmission to the mounting portion side is suppressed.

  As described above, in the present invention, the anti-vibration rubber has a portion that shares the vibration component in the direction perpendicular to the central axis of the bolt and a portion that shares the vibration component in the direction along the central axis of the bolt. It is the same.

  The “contact surface on the electric compressor side” refers to a contact surface disposed closer to the electric compressor than the anti-vibration rubber in the vibration transmission system from the electric compressor to the mounting portion. is there. The “abutment surface on the attachment portion side” is a contact surface disposed closer to the attachment portion than the vibration-proof rubber in a vibration transmission system from the electric compressor to the attachment portion.

  According to a second aspect of the present invention, in the first aspect, the end surface on the electric compressor side of the anti-vibration rubber is connected to the contact surface on the electric compressor side by adhesion. The bonding method simplifies the connection structure between the end surface of the vibration-proof rubber and the contact surface on the electric compressor side, and facilitates the connection work.

  According to a third aspect of the present invention, in the first or second aspect, the contact surface on the electric compressor side is provided by an attachment member through which a bolt is inserted and fixed to the housing of the electric compressor. Therefore, it is possible to employ a procedure for connecting the vibration-proof rubber to the mounting member before fixing the mounting member to the housing. That is, the attachment member and the vibration isolating rubber can be connected in advance and prepared as an integrated product, and the operation of attaching the electric compressor to the vehicle can be simplified.

  According to a fourth aspect of the present invention, in the third aspect, the mounting member includes a cylindrical portion press-fitted into the mounting hole, and a flange portion extending radially outward from an end portion of the cylindrical portion. In the flange portion, the end surface on the vibration proof rubber side forms a contact surface on the electric compressor side. The press-fitting method facilitates the fixing operation of the mounting member to the housing.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the end surface on the mounting portion side of the anti-vibration rubber is bonded to the contact surface on the mounting portion side with which the end surface abuts. Therefore, for example, when the electric compressor vibrates in the direction orthogonal to the central axis of the bolt, it is possible to prevent the vibration-proof rubber from sliding on the end surface of the vibration-proof rubber and the contact surface on the mounting portion side. Abrasion deterioration can be prevented.

  According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the contact surface on the mounting portion side is provided by a spacer separate from the mounting portion. Therefore, the spacer and the anti-vibration rubber can be bonded in advance to prepare an integrated product, and the mounting work of the electric compressor on the vehicle can be simplified.

  A seventh aspect of the present invention is the vibration isolator according to any one of the first to sixth aspects, wherein the anti-vibration rubber includes a cylindrical auxiliary portion. The auxiliary portion is disposed with a gap in at least one of the inner side and the outer side in the mounting hole.

  Here, for example, when the anti-vibration rubber is deteriorated, a part on the electric compressor side in the attachment hole is in close proximity to a part on the attachment portion side in the attachment hole due to a vibration component in a direction orthogonal to the central axis of the bolt. There is a case. However, in this case, the auxiliary portion is interposed between the electric compressor side portion and the attachment portion side portion, and the electric compressor side portion and the attachment portion side portion are directly connected. It is possible to suppress the occurrence of shocking vibration and abnormal noise due to the contact.

  According to the first to seventh aspects of the present invention, it is not necessary to greatly change the corresponding portion of the vibration-proof rubber for each vibration component of the electric compressor.

  Hereinafter, the first and second embodiments in which the present invention is embodied in an attachment structure for attaching an electric compressor to a vehicle in an electric compressor for compressing a refrigerant constituting a vehicle air conditioner will be described. In the second embodiment, only differences from the first embodiment will be described, and the same or corresponding members will be denoted by the same reference numerals and description thereof will be omitted.

First Embodiment First, the vehicle air conditioner will be described.
As shown in FIG. 1, the refrigeration circuit 10 of the vehicle air conditioner includes an electric compressor 11 that compresses refrigerant gas, a gas cooler 12 that cools high-pressure refrigerant gas discharged from the electric compressor 11, and the gas cooler 12. An expansion valve 13 that throttles the refrigerant from the expansion valve 13 and an evaporator 14 that evaporates the refrigerant from the expansion valve 13 are provided. The electric compressor 11 is configured such that a compression mechanism 22 that compresses refrigerant gas and an electric motor 23 that drives the compression mechanism 22 are housed in a cylindrical housing 21. The electric compressor 11 is fixed to an engine E that is a travel drive source of the vehicle J. That is, the engine E forms an attachment portion for fixing the electric compressor 11 when attaching the electric compressor 11 to the vehicle J.

  Note that a control computer (not shown) for controlling the engine E performs so-called idling stop control in which the engine E in an idling state is automatically stopped when the vehicle J is in a travel stop state such as waiting for a signal. That is, the vehicle J is a so-called eco-run vehicle.

Next, the attachment structure of the electric compressor 11 to the vehicle J will be described.
As shown in FIGS. 2 and 3 (a), a plurality of (three in this embodiment (see FIG. 1)) mounting legs 31 project integrally from the outer surface of the housing 21 of the electric compressor 11. Has been. The electric compressor 11 is fixed to the engine E via the mounting legs 31. Each mounting leg 31 has a substantially cylindrical shape, and extends in a direction perpendicular to the cylindrical central axis of the housing 21. Each mounting leg 31 is arranged so that the central axes thereof are parallel to each other.

  As shown in FIG. 3A, a mounting hole 32 extending along the extending direction is penetrated through the mounting leg 31. The inside of the mounting hole 32 is composed of a small diameter portion 32a disposed in the center in the extending direction and large diameter portions 32b disposed on both ends of the small diameter portion 32a. A bolt 35 fixed to the engine E is inserted into the mounting hole 32 of the mounting leg 31.

  The bolt 35 has a shaft portion 35a, most of which is located in the mounting hole 32 of the mounting leg 31, a male screw portion 35b disposed on the engine E side outside the mounting hole 32, and the engine E outside the mounting hole 32. The head 35c disposed on the opposite side is connected in the direction along the central axis S. The outer diameter of the shaft portion 35 a is smaller than the inner diameter of the small diameter portion 32 a of the mounting hole 32. The outer diameter of the shaft portion 35a is larger than the outer diameter of the male screw portion 35b. A step portion 35d is formed at the boundary between the shaft portion 35a and the male screw portion 35b. The engine E is formed with a female screw portion 36 into which the male screw portion 35b of the bolt 35 is screwed.

  A compressor mount 38 is disposed at the end of each mounting leg 31 on the engine E side. A compressor mount 39 is disposed at the end of each mounting leg 31 on the head 35 c side of the bolt 35. The electric compressor 11 is fixed to the engine E via compressor mounts 38 and 39 and bolts 35.

  Each of the compressor mounts 38 and 39 includes a cylindrical anti-vibration rubber 41 disposed outside the attachment hole 32, and a cylindrical attachment member 43 disposed on the attachment leg 31 side with respect to the anti-vibration rubber 41. A flat and ring-shaped spacer disposed on the side opposite to the mounting leg 31 with respect to the anti-vibration rubber 41 (the spacer of the compressor mount 38 is “44A” and the spacer of the compressor mount 39 is “44B”) A cylindrical regulating ring 45 disposed in close contact with the outer peripheral surface of the vibration isolating rubber 41 is integrated. The bolt 35 is inserted through the center of the ring-shaped compressor mounts 38 and 39. In the anti-vibration rubber 41, an inner surface of the through hole 41 a at the center portion through which the bolt 35 is inserted is in close contact with the outer surface of the shaft portion 35 a of the bolt 35.

  The mounting member 43 includes a cylindrical portion 47 that is press-fitted into the large-diameter portion 32 b of the mounting hole 32, and a flange portion 48 that extends radially outward from the end of the cylindrical portion 47 outside the mounting hole 32. ing. The inner diameter of the cylindrical portion 47 is substantially the same as the inner diameter of the small diameter portion 32 a of the mounting hole 32. The cylindrical portion 47 is press-fitted into the mounting hole 32 until the end surface 48 a on the mounting leg 31 side of the flange portion 48 contacts the opening end surface of the mounting hole 32 in the mounting leg 31.

  In the flange portion 48 of the mounting member 43, the end surface on the side opposite to the mounting leg 31, that is, the end surface in contact with the anti-vibration rubber 41 can be grasped as the contact surface 48 b on the electric compressor 11 side. An end face (end face on the electric compressor 11 side) 41b of the vibration isolating rubber 41 on the mounting leg 31 side is connected to the contact surface 48b by adhesion. For this adhesion, for example, vulcanization adhesion is used.

  The end surface 41b of the anti-vibration rubber 41 bonded to the contact surface 48b of the mounting member 43 is relatively moved in the direction along the center axis S of the bolt 35 and the direction perpendicular to the center axis S with respect to the contact surface 48b. It can be said that it is connected so as not to. That is, if the mounting member 43 attempts to move relative to the vibration isolating rubber 41 in the direction along the central axis S of the bolt 35 and the direction orthogonal to the central axial line S, the vibration isolating rubber 41 is deformed.

  In the compressor mount 38 located on the engine E side, the spacer 44A includes a support surface 36a formed around the opening of the female screw portion 36 in the engine E, and an end surface 41c on the engine E side in the vibration isolating rubber 41. Is intervening. The end surface 41c on the engine E side in the vibration isolating rubber 41 is bonded to a contact surface (a contact surface on the engine E side) 44a formed by the end surface on the mounting leg 31 side in the spacer 44A. For this adhesion, for example, vulcanization adhesion is used. That is, the contact surface 48b of the mounting member 43 and the contact surface 44a of the spacer 44A are disposed in front of and behind in the direction along the central axis S of the bolt 35 with respect to the vibration isolation rubber 41. Each is abutted and bonded.

  The inner diameter of the spacer 44A is smaller than the outer diameter of the shaft portion 35a of the bolt 35 and larger than the outer diameter of the male screw portion 35b. A region located radially inward of the contact region with the vibration isolating rubber 41 in the spacer 44 </ b> A is interposed between the support surface 36 a of the engine E and the stepped portion 35 d of the bolt 35. In the bolt 35, the male screw portion 35b is screwed into the female screw portion 36 until the spacer 44A comes into close contact with each of the step portion 35d and the support surface 36a of the engine E. That is, the spacer 44A is fixed between the stepped portion 35d of the bolt 35 and the support surface 36a of the engine E and is fixed to the engine E.

  In the compressor mount 39 located on the head 35c side of the bolt 35, the spacer 44B is located between the head 35c and the end face (end face on the engine E side) 41c on the head 35c side of the vibration isolating rubber 41. Intervened. The inner diameter of the spacer 44B is larger than the outer diameter of the shaft portion 35a of the bolt 35. The end face 41c on the head 35c side of the anti-vibration rubber 41 is bonded to a contact surface (a contact surface on the engine E side) 44a formed by the end surface on the mounting leg 31 side of the spacer 44B. For this adhesion, for example, vulcanization adhesion is used. That is, the contact surface 48b of the mounting member 43 and the contact surface 44a of the spacer 44B are arranged in front and rear in the direction along the central axis S of the bolt 35 with respect to the vibration isolation rubber 41, and Each is abutted and bonded.

  The anti-vibration rubber 41 is press-fitted into the regulation ring 45. The central portion of the regulating ring 45 in the axial direction is curved toward the vibration isolating rubber 41 and has a smaller inner diameter than the opening end side. By setting the inner diameter of the regulating ring 45 to a small diameter at the center, it is possible to suppress the vibration-proof rubber 41 from coming off from the regulating ring 45.

  As shown in FIG. 3B, in the compressor mounts 38 and 39, the through-hole 41a of the anti-vibration rubber 41 is slightly inside the outer diameter of the shaft portion 35a of the bolt 35 before the bolt 35 is tightened. Is formed to be large. Therefore, it is possible to suppress elastic deformation of the vibration isolating rubber 41 when the bolt 35 (shaft portion 35a) is inserted into the compressor mounts 38 and 39 (vibration isolating rubber 41). Therefore, it is possible to suppress the occurrence of a large sliding resistance between the anti-vibration rubber 41 and the bolt 35, and the bolt 35 can be easily inserted into the compressor mounts 38 and 39.

  Further, as shown in FIG. 3A, when the bolt 35 is tightened in a state where the bolt 35 is inserted into the compressor mounts 38 and 39, the contact surface 44a of the spacer 44 and the mounting member 43 (flange portion 48). The distance between the contact surface 48b and the vibration-proof rubber 41 is compressed and deformed between the contact surfaces 44a and 48b.

  The outer periphery of the anti-vibration rubber 41 is restrained by a restriction ring 45. For this reason, the movement of the meat in the vibration-proof rubber 41 that is compressively deformed is mainly performed inward in the radial direction, and an increase in the outer diameter of the vibration-proof rubber 41 is suppressed. Accordingly, the inner diameter of the through hole 41a of the vibration isolating rubber 41 is reduced, and a close contact state between the inner surface of the through hole 41a and the outer surface of the shaft portion 35a of the bolt 35 is brought about. Therefore, rattling between the vibration isolating rubber 41 and the bolt 35 can be eliminated, the vibration isolating capability of the vibration isolating rubber 41 can be fully exhibited, and the vibration isolating based on sliding with the bolt 35 can be achieved. The wear deterioration of the rubber 41 can be suppressed.

  Next, a description will be given of the anti-vibration action by the compressor mounts 38 and 39. The anti-vibration action by the compressor mounts 38 and 39 is particularly effective when the engine E is stopped and the electric compressor 11 is in operation, as described in “Background Art”.

  The three-dimensional vibration of the electric compressor 11 generated during operation of the electric compressor 11 is caused by a vibration component in the direction along the central axis S of the bolt 35 and a direction orthogonal to the central axis S of the bolt 35. It can be divided into vibration components. Among vibrations of the electric compressor 11, vibration components in the direction along the central axis S of the bolt 35 are caused by elastic deformation of the vibration isolating rubber 41 and the contact surface 48 b of the mounting member 43 (flange portion 48) and the spacer 44 </ b> A. , B contact surface 44a is relatively moved in the direction along the central axis S, so that transmission to the engine E side is suppressed.

  Of the vibration of the electric compressor 11, the vibration component in the direction perpendicular to the central axis S of the bolt 35 is caused by the elastic deformation of the vibration isolating rubber 41 and the contact surface 48 b of the mounting member 43 (flange portion 48). Since the contact surfaces 44a of the spacers 44A and 44B move relative to each other in the direction orthogonal to the central axis S, transmission to the engine E side is suppressed.

  That is, the anti-vibration rubber 41 of the compressor mounts 38 and 39 has a portion that shares a vibration component in a direction orthogonal to the central axis S of the bolt 35 and a vibration component in a direction along the central axis S of the bolt 35. The shared part is almost the same. Therefore, for example, it is possible to prevent the vibration-proof rubber 41 from increasing in size in the direction along the central axis S of the bolt 35 as compared with the technique of Patent Document 1 in which the shared portion is provided separately. Therefore, the operation of inserting the bolt 35 into the vibration isolating rubber 41 can be easily performed, and the operation of attaching the electric compressor 11 to the vehicle J can be simplified. Further, during vibration of the electric compressor 11, it is possible to prevent stress from being concentrated on a part of the vibration isolating rubber 41, and to improve the durability of the vibration isolating rubber 41.

In the present embodiment, the following operational effects are also achieved.
(1) The end surface 41 b of the vibration isolating rubber 41 is connected to the contact surface 48 b of the mounting member 43 by adhesion. The bonding method simplifies the connection structure between the end surface 41b of the vibration-proof rubber 41 and the contact surface 48b of the mounting member 43, and facilitates the connection work.

  (2) The contact surface 48 b on the electric compressor 11 side is provided by a mounting member 43 that is separate from the housing 21. Therefore, a procedure for adhering the vibration isolating rubber 41 to the mounting member 43 can be adopted before the mounting member 43 is fixed to the housing 21. That is, the attachment member 43 and the vibration isolating rubber 41 can be prepared in advance as an integrated product, and the attachment work of the electric compressor 11 to the vehicle J can be simplified.

  (3) The cylindrical portion 47 of the attachment member 43 is press-fitted into the attachment hole 32 of the attachment leg 31. The press-fitting method facilitates fixing of the mounting member 43 to the mounting leg 31, that is, the housing 21.

  (4) The end surface 41c of the vibration isolating rubber 41 is bonded to the contact surface 44a of the spacers 44A and 44B. Therefore, for example, when the electric compressor 11 vibrates in the direction orthogonal to the central axis S of the bolt 35, the end surface 41c of the vibration isolating rubber 41 and the contact surface 44a of the spacers 44A and B slide. It is possible to prevent the wear-resistant rubber 41 from being worn away.

  (5) The contact surface 44a on the engine E side is provided by spacers 44A and B separate from the engine E. Therefore, the spacers 44A and 44B and the vibration isolating rubber 41 can be bonded in advance and prepared as an integrated product, and the work of attaching the electric compressor 11 to the vehicle J can be simplified.

Second Embodiment As shown in FIG. 4, in the anti-vibration rubber 41 of the compressor mounts 38 and 39, a cylindrical auxiliary portion 41d is integrally formed on the inner peripheral portion of the end surface 41b on the mounting leg 31 side. Projected. The auxiliary portion 41 d is disposed in the cylindrical portion 47 of the attachment member 43. The auxiliary portion 41 d is in close contact with the inner surface of the cylindrical portion 47, and is disposed with a gap with respect to the outer surface of the shaft portion 35 a of the bolt 35. The inner diameter of the auxiliary portion 41 d is smaller than the inner diameter of the small diameter portion 32 a of the mounting hole 32.

  The auxiliary portion 41d functions as follows. That is, if the vibration component in the direction orthogonal to the central axis S of the bolt 35 becomes extremely large for some reason among the vibrations of the electric compressor 11, the small diameter portion 32 a of the mounting hole 32 which is a part on the electric compressor 11 side. The inner surface may be extremely close to a part of the outer surface of the shaft portion 35a of the bolt 35 that is a part on the engine E side. Further, when the vibration isolating rubber 41 deteriorates or the adhesion between the vibration isolating rubber 41 and the mounting member 43 deteriorates, the small diameter portion 32a of the mounting hole 32 is caused by a vibration component in a direction orthogonal to the central axis S of the bolt 35. In some cases, the inner surface of the shaft may be extremely close to the outer surface of the shaft portion 35 a of the bolt 35.

  Even in such a case, the auxiliary portion 41d contacts the outer surface of the shaft portion 35a before the inner surface of the small diameter portion 32a of the mounting hole 32 contacts the outer surface of the shaft portion 35a of the bolt 35. It is possible to suppress the occurrence of shocking vibration and abnormal noise. Therefore, for example, the vibration of the electric compressor 11 transmitted to the passenger compartment can be prevented from becoming extremely large during the period from the deterioration of the vibration-proof rubber 41 to the replacement of the compressor mounts 38 and 39 with new ones. .

  The auxiliary portion 41d is disposed with a gap with respect to the outer surface of the shaft portion 35a of the bolt 35. Therefore, when the electric compressor 11 is not excessively vibrated or when the main body portion (the portion other than the auxiliary portion 41d) of the vibration isolating rubber 41 is normal, the auxiliary portion 41d does not exhibit the above-described anti-vibration action. The auxiliary portion 41d does not deteriorate at the same time as the main body portion of the anti-vibration rubber 41.

For example, the following embodiments can be implemented without departing from the spirit of the present invention.
As shown in FIG. 5, the bolt 35 of the second embodiment is changed and a stud type bolt 51 is used. In the bolt 51, a male screw part 51 b provided on one end side of the shaft part 51 a is screwed into the female screw part 36 of the engine E. On the other end of the bolt 51 that protrudes from the mounting leg 31 on the side opposite to the engine E, a male screw portion 51c is provided.

  A nut 52 corresponding to the head portion 35c of the bolt 35 is attached to the male screw portion 51c. The outer diameter of the shaft portion 51a is larger than the outer diameter of the male screw portion 51c, and a step portion 51d is formed at the boundary between the shaft portion 51a and the male screw portion 51c. The nut 52 is screwed into the male screw portion 51c up to a position where it comes into contact with the step portion 51d.

  In the bolt 51, a flange portion 51e is provided at the boundary between the shaft portion 51a and the male screw portion 51b. The flange portion 51e is interposed between the compressor mount 38 (end surface of the spacer 44A) and the engine E (support surface 36a). The inner diameter of the spacer 44 </ b> A of the compressor mount 38 is larger than the outer diameter of the shaft portion 51 a of the bolt 51. The spacer 44A of the compressor mount 38 is the same as the spacer 44B of the compressor mount 39. In other words, the compressor mount 38 and the compressor mount 38 have the same shape and size, and the mounting positions of the compressor mounts 38 and 39 are the positions of the engine E side or the bolts 35 with respect to the mounting legs 31. Any of the head 35c side may be sufficient.

  ○ The second embodiment is changed as shown in FIG. 6, and the pipe 55 is disposed outside the shaft portion 35 a of the bolt 35. Then, the anti-vibration rubber 41 (the inner surface of the through hole 41 a) of the compressor mounts 38 and 39 is brought into close contact with the outer surface of the pipe 55. In the compressor mounts 38 and 39, the through-hole 41a of the vibration isolating rubber 41 is formed so that the inner diameter is slightly larger than the outer diameter of the pipe 55 before the bolt 35 is tightened. Therefore, the pipe 55 can be easily inserted into the compressor mounts 38 and 39 (antivibration rubber 41).

  Further, in this aspect, when the bolt 35 is tightened, that is, when the bolt 35 is screwed, the relative movement between the bolt 35 and the pipe 55 can be smoothly performed. In other words, in a mode in which the pipe 55 is not used, when the bolt 35 is screwed, the bolt 35 and the vibration isolating rubber 41 slide in the direction along the center axis S and the circumferential direction around the center axis S. In addition, the smooth rotation of the bolt 35 is hindered.

○ Do not bend the center of the restriction ring 45. That is, the regulation ring 45 is a cylinder having an equal inner diameter.
○ Adhere the regulation ring 45 to the vibration-proof rubber 41. For this adhesion, for example, vulcanization adhesion may be used.

  ○ For example, as shown in FIG. 7, the restriction ring 45 is deleted from the compressor mounts 38 and 39. 7 shows a modified example of the first embodiment. The spacer 44A of the first embodiment is grasped as a simple washer 44A, and the end surface 41c of the washer 44A and the vibration isolating rubber 41 is shown. A spacer 58 is interposed therebetween. In the spacer 58, the end surface that abuts against the end surface 41 c of the anti-vibration rubber 41 forms an abutment surface 58 a on the engine E side.

  Cylindrical portions 59 are formed integrally with the inner peripheral portion of the spacer 58 in the compressor mount 38 and the inner peripheral portion of the spacer 44B in the compressor mount 39, respectively. The cylindrical portion 59 is interposed between the inner surface of the through hole 41 a of the vibration isolating rubber 41 and the outer surface of the shaft portion 35 a of the bolt 35. The outer surface of the cylindrical portion 59 is bonded to the inner surface of the through hole 41a of the vibration proof rubber 41 by vulcanization bonding or the like. By adhering the inner surface of the through-hole 41a of the vibration isolating rubber 41 to the outer surface of the cylindrical portion 59, it is possible to prevent wear deterioration of the inner surface due to sliding due to vibration of the electric compressor 11.

O The cylindrical part 47 is deleted from the attachment member 43, and the flange part 48 is fixed to the attachment leg 31 by bolting or the like.
○ The mounting member 43 is deleted from the compressor mounts 38 and 39. Then, the end surface 41b of the vibration isolating rubber 41 is directly bonded to the end surface of the mounting leg 31 (the opening end surface of the mounting hole 32) which is a contact surface on the electric compressor 11 side.

  Remove the spacers 44A, B from the compressor mounts 38, 39. The end surface 41c of the vibration isolating rubber 41 in the compressor mount 38 is on the support surface 36a of the engine E, which is the contact surface on the engine E side, and the end surface 41c of the anti vibration isolating rubber 41 in the compressor mount 39 is on the engine E side. Adhere directly to the end face of the head part 35c of the bolt 35 which is a contact surface.

O Adhesion of each part mentioned above is not limited to vulcanization adhesion, For example, you may make it use an adhesive agent.
The connection structure between the end surface 41b of the vibration isolating rubber 41 and the contact surface 48b of the mounting member 43 is not limited to that by adhesion. For example, the end surface 41b and the contact surface 48b are connected to each other so that the end surface 41b of the vibration isolating rubber 41 does not move relative to the contact surface 48b of the mounting member 43 in a direction perpendicular to the central axis S of the bolt 35. You may make it connect by a combination.

○ Do not bond the end face 41c of the vibration isolating rubber 41 to the contact face 44a of the spacers 44A and 44B.
○ One of the compressor mounts 38 and 39 is deleted, and an anti-vibration rubber 77A (77B) adopted in Patent Document 1 is used as an alternative.

The inner diameter of the through-hole 41a of the anti-vibration rubber 41 may be less than the outer diameter of the shaft portion 35a of the bolt 35 or the pipe 55 before the bolt 35 is tightened.
The second embodiment is modified such that the auxiliary portion 41 d is brought into close contact with the outer surface of the shaft portion 35 a of the bolt 35 and is disposed with a gap with respect to the inner surface of the cylindrical portion 47 of the mounting member 43. Alternatively, the auxiliary portion 41 d is arranged with a gap with respect to the inner surface of the cylindrical portion 47 of the mounting member 43 and also with a gap with respect to the outer surface of the shaft portion 35 a of the bolt 35.

  The electric compressor 11 is not limited to being directly fixed to the engine E when the electric compressor 11 is attached to the vehicle J. For example, the electric compressor 11 is attached to an electric vehicle such as a hybrid vehicle or a fuel cell vehicle. You may make it fix an electric compressor to the electric motor for driving | running | working as a part. The hybrid vehicle includes a type in which only the electric motor for travel is used as a travel drive source, and the engine is dedicated to power generation, in addition to those using both the engine and the travel electric motor as a travel drive source.

  The electric compressor to which the present invention can be applied is not limited to a refrigerant compressor of a refrigeration circuit. For example, in an air compressor used in an air suspension device of a vehicle or a fuel cell vehicle, hydrogen or Examples include pumps that are used to pump air into the stack.

The schematic diagram which shows the vehicle air conditioner of 1st Embodiment. The schematic diagram which shows the attachment structure of the electric compressor with respect to a vehicle. It is the longitudinal cross-sectional view of the attachment leg vicinity of an electric compressor, Comprising: (a) shows the state in which the volt | bolt was fastened, (b) shows the state before tightening a volt | bolt. It is a figure which shows 2nd Embodiment and is a longitudinal cross-sectional view of the attachment leg vicinity of an electric compressor. It is a figure which shows another example, and is a longitudinal cross-sectional view of the attachment leg vicinity of an electric compressor. It is a figure which shows another example, and is a longitudinal cross-sectional view of the attachment leg vicinity of an electric compressor. It is a figure which shows another example, and is a longitudinal cross-sectional view of the attachment leg vicinity of an electric compressor. The schematic diagram which shows the attachment structure of the electric compressor with respect to the vehicle in patent document 1. FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Electric compressor, 21 ... Housing, 32 ... Mounting hole, 35 ... Bolt, 41 ... Anti-vibration rubber (b ... End surface by the side of an electric compressor, c ... End surface by the side of an attachment part, d ... Auxiliary part (2nd implementation) (Form)), 43 ... mounting member, 44A, B ... spacer (a ... contact surface on the mounting portion side), 47 ... cylindrical portion, 47 ... flange portion (b ... contact surface on the electric compressor side), 51 ... Bolt (another example), 55 ... pipe (another example), 58 ... spacer (a ... abutment surface on the mounting portion side (another example)), E ... engine as an attaching portion, J ... vehicle, S ... center of bolt Axis.

Claims (7)

An electric compressor mounting structure for fixing an electric compressor to a mounting portion of a vehicle via an anti-vibration rubber and a bolt, wherein the mounting hole provided in the electric compressor is fixed to the mounting portion. In the mounting structure of the electric compressor in which the bolt is inserted and the vibration-proof rubber having a cylindrical shape is arranged around the bolt,
Contact surfaces are provided on the electric compressor side and the attachment portion side, respectively, and the contact surface on the electric compressor side and the contact surface on the attachment portion side are against the anti-vibration rubber. Arranged on the front and rear in the direction along the central axis of the bolt and abut against the anti-vibration rubber, respectively, and the end surface on the electric compressor side of the anti-vibration rubber is the end on the electric compressor side on which the end surface abuts. An electric compressor mounting structure, wherein the electric compressor is connected so as not to move relative to a contact surface in a direction perpendicular to the central axis of the bolt.   2. The electric compressor mounting structure according to claim 1, wherein the end surface on the electric compressor side of the anti-vibration rubber is connected to the contact surface on the electric compressor side by bonding.   The electric compressor mounting structure according to claim 1 or 2, wherein the contact surface on the electric compressor side is provided by an attachment member through which the bolt is inserted and fixed to a housing of the electric compressor.   The mounting member includes a cylindrical portion press-fitted into the mounting hole, and a flange portion extending radially outward from an end portion of the cylindrical portion, and the end surface on the vibration-proof rubber side of the flange portion is The mounting structure of the electric compressor according to claim 3, wherein the contact surface on the electric compressor side is formed.   The electric compressor according to any one of claims 1 to 4, wherein an end surface of the vibration isolating rubber on the attachment portion side is bonded to the contact surface on the attachment portion side with which the end surface abuts. Mounting structure.   The electric compressor mounting structure according to claim 5, wherein the contact surface on the mounting portion side is provided by a spacer separate from the mounting portion.   The said vibration-proof rubber is provided with the auxiliary | assistant part which makes a cylindrical shape, and this auxiliary | assistant part is arrange | positioned in the said attachment hole with the clearance gap between at least one of the inner side and the outer side. Electric compressor mounting structure.

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