Fitting structure for electrical equipment

Abstract

To provide a fitting structure for electrical equipment that can excellently reduce vibrations of electric equipment fitted to object equipment as a vibration source.SOLUTION: A fitting structure for electronic equipment is for fitting the electric equipment to object equipment as a vibration source, and includes: a first support member which is fastened to one lengthwise end surface of the electronic equipment through a plurality of first bushes and a plurality of first bolts, and also fixed to the object equipment; a second support member which is fastened to one of a pair of side surfaces of the electric equipment extending from the one end surface along the length through a second bush and a second bolt, and also fixed to the object equipment; and a third support member which is fastened to the other of the pair of side surfaces of the electric equipment through a third bush and a third bolt, and also fixed to the object equipment.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to an attachment structure for an electrical device for attaching an electrical device to a target device.

Background Art

[0002] Conventionally, an electric vehicle including a rear motor that drives a rear wheel and a power control unit that supplies AC power to the rear motor is known (see, for example, Patent Document 1). The power control unit of this electric vehicle is housed in a case, and the case includes a front rib extending from its front surface, and a right rear rib and a left rear rib extending from its rear surface. The front rib, the right rear rib, and the left rear rib of the case are fixed to the rear floor panel of the electric vehicle via vibration isolators press-fitted into through holes formed in each rib and bolts penetrating the hollow portions of the respective vibration isolators in the vertical direction (height direction).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above conventional electric vehicle, the power control unit as an electrical device can be protected from loads such as vibrations generated in the electric vehicle by the vibration isolators. However, in the above electric vehicle, the resonance magnification of a plurality of vibration isolators may increase in a specific frequency range, and there is a risk that the vibration of the power control unit may increase.

[0005] Therefore, the main object of the present disclosure is to provide an attachment structure for an electrical device that can satisfactorily reduce the vibration of the electrical device attached to a target device that is a vibration source.

Means for Solving the Problems

[0006] The mounting structure of the electrical equipment of the present disclosure is a mounting structure of an electrical equipment for mounting the electrical equipment on a target device serving as a vibration source, and is fastened to one end face in the longitudinal direction of the electrical equipment via a plurality of first bushes and a plurality of first bolts, and a first support member fixed to the target device; and a second support member that is fastened to one of a pair of side surfaces of the electrical equipment extending in the longitudinal direction from the one end face via a second bush and a second bolt and is fixed to the target device; and a third support member that is fastened to the other of the pair of side surfaces of the electrical equipment via a third bush and a third bolt and is fixed to the target device.

[0007] The mounting structure of the electrical equipment of the present disclosure includes a first support member, a second support member, and a third support member. The first support member is fastened to one end face in the longitudinal direction of the electrical equipment via a plurality of first bushes and a plurality of first bolts and is fixed to the target device. The second support member is fastened to one of a pair of side surfaces of the electrical equipment extending in the longitudinal direction from the one end face via a second bush and a second bolt and is fixed to the target device. The third support member is fastened to the other of the pair of side surfaces of the electrical equipment via a third bush and a third bolt and is fixed to the target device. Thereby, since the contraction direction of the first bush and the contraction directions of the second and third bushes can be made to intersect, it is possible to suppress an increase in the resonance magnification of the first, second, and third vibration isolation bushes in a specific frequency range. As a result, according to the mounting structure of the electrical equipment of the present disclosure, it is possible to satisfactorily reduce the vibration of the electrical equipment mounted on the target device serving as the vibration source.

[0008] Further, the second support member may be fastened to the one of the pair of side surfaces via a single second bush and a single second bolt, the third support member may be fastened to the other of the pair of side surfaces via a single third bush and a single third bolt, and the second and third support members may be connected to each other.

[0009] As a result, since the second and third support members are mutually constrained, it becomes possible to regulate the movement of the second and third support members caused by the vibration of the target device and to satisfactorily suppress loosening of the second bolt and the third bolt.

[0010] Furthermore, the second support member may be fastened to one of the pair of side surfaces via the plurality of second bushes and the plurality of second bolts, and the third support member may be fastened to the other of the pair of side surfaces via the plurality of third bushes and the plurality of third bolts.

[0011] In such an attachment structure, when the target device vibrates, it is possible to regulate the movement of the second support member relative to the electric device by the plurality of second bolts and to regulate the movement of the third support member relative to the electric device by the plurality of third bolts. Therefore, even if the second and third support members are not connected to each other, it becomes possible to satisfactorily suppress loosening of the second bolt and the third bolt.

[0012] Further, the target device may be mounted on a vehicle and may be a transaxle including at least an electric motor or another device attached to the transaxle, and the electric device may be a charger used for charging a battery that exchanges power with the electric motor.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Best Mode for Carrying Out the Invention

[0014] Next, with reference to the drawings, a mode for carrying out the invention of the present disclosure will be described.

[0015] FIG. 1 is a schematic configuration diagram showing a vehicle 1 to which the mounting structure of the electric device of the present disclosure is applied. The vehicle 1 shown in the figure is a front-wheel drive hybrid vehicle including an engine 10, a transaxle 20 as a power transmission device that is connected to the engine 10 and includes motor generators MG1 and MG2, and a battery (not shown) that exchanges electric power with the motor generators MG1 and MG2 of the transaxle 20 via an inverter (not shown). The engine 10 is an internal combustion engine that burns a mixture of a hydrocarbon-based fuel and air injected from an injector (not shown) in a plurality of combustion chambers and converts the reciprocating motion of a piston accompanying the combustion of the mixture into a rotational motion of a crankshaft.

[0016] As shown in FIG. 1, the transaxle 20 includes, in addition to the motor generators MG1 and MG2, a planetary gear 30, a differential gear 39, and a case 40 that houses these elements. The motor generator MG1 (first electric motor) is a synchronous generator motor (three-phase AC motor) including a stator S1 and a rotor R1, and operates as a generator that converts at least a part of the power from the engine 10 that is mainly operated under load into electric power. The motor generator MG2 (second electric motor) is a synchronous generator motor (three-phase AC motor) including a stator S2 and a rotor R2, and operates as an electric motor that is mainly driven by electric power from at least one of the battery and the motor generator MG1 and generates a driving torque.

[0017] The planetary gear 30 is a differential rotation mechanism including a sun gear (first rotating element) 31, a ring gear (second rotating element) 32, and a planetary carrier (third rotating element) 34 that rotatably supports a plurality of pinion gears 33. As shown in FIG. 1, the sun gear 31 is connected to the rotor R1 of the motor generator MG1 via a hollow rotor shaft RS. The planetary carrier 34 is coaxially fixed to a carrier shaft CS, and is connected to the crankshaft of the engine 10 via the carrier shaft CS and the damper mechanism 25. The ring gear 32 is integrated with a counter drive gear 35 as an output member, and both rotate coaxially and integrally.

[0018] The counter drive gear 35 meshes with a counter driven gear 36, a drive pinion gear (final drive gear) 37 that rotates integrally with the counter driven gear 36, a differential ring gear 39r that meshes with the drive pinion gear 37 and rotates integrally with the differential case of the differential gear 39, and is connected to the left and right wheels (drive wheels) W via the differential gear 39 and a drive shaft DS. The gear mechanism of the transaxle 20, that is, the gear train from the planetary gear 30 and the counter drive gear 35 to the differential gear 39, connects the engine 10 and the motor generator MG1 to each other, and transmits a part of the output torque of the engine 10 as a power generation source to the drive shaft DS and the wheels W.

[0019] Also, a drive gear 38 is connected (fixed) to the rotor R2 of the motor generator MG2 so as to rotate integrally via a motor shaft MS. The drive gear 38 has fewer teeth than the counter drive gear 36 and meshes with the counter drive gear 36. Thereby, the motor generator MG2 is connected to the left and right drive shafts DS and wheels W via the drive gear 38, the counter drive gear 36, the drive pinion gear 37, the differential ring gear 39r, and the differential gear 39. That is, the motor generator MG2 functions as a power generation source that outputs drive torque (driving force) to the drive shafts DS and wheels W alone or in cooperation with the engine 10, and outputs a regenerative braking torque when braking the vehicle 1.

[0020] The case 40 of the transaxle 20 includes a first case 41, a second case 42, and a cover (third case) 45. The first and second cases 41 and 42 and the cover 45 are all cast products formed of, for example, an aluminum alloy or a steel material. As shown in FIGS. 1 and 2, the first case 41 is fastened (coupled) to the engine block (cylinder block) 110 of the engine 10 via a plurality of bolts so as to be adjacent in the vehicle width direction of the vehicle 1. The second case 42 is fastened (coupled) to the first case 41 via a plurality of bolts so as to be adjacent in the vehicle width direction of the vehicle 1, and constitutes a case body together with the first case 41. The cover 45 is fastened (coupled) to the second case 42 via a plurality of bolts so as to cover the open end of the second case 42 on the side opposite to the first case 41.

[0021] Further, the second case 42 has a partition wall 42w (see FIG. 1) that divides the inside of the case 40 (the case body) into two parts. As a result, inside the case 40, a gear chamber Cg is defined on the engine 10 side of the partition wall 42w, and a motor chamber Cm is defined on the cover 45 side of the partition wall 42w. As shown in FIGS. 1 and 2, a gear mechanism, that is, a gear train from the planetary gear 30 and the counter drive gear 35 to the differential gear 39, is arranged in the gear chamber Cg. As shown in FIGS. 1 and 2, in the motor chamber Cm, motor generators MG1 and MG2 and a power control unit (hereinafter referred to as "PCU") 50 connected to the motor generators MG1 and MG2 and the battery are arranged.

[0022] The PCU 50 includes a first inverter, a second inverter, a boost converter, a filter capacitor, a smoothing capacitor, a DC / DC converter, an electronic control unit, etc. The first inverter drives the motor generator MG1, and the second inverter drives the motor generator MG2. The boost converter boosts the power from the battery and steps down the power from the motor generators MG1 and MG2 sides. The DC / DC converter is connected to a power line connecting the battery and the boost converter, an auxiliary battery, and a plurality of auxiliary devices, and steps down the power on the battery and boost converter sides to a target voltage and supplies it to the auxiliary battery and the auxiliary devices. The electronic control unit includes a microcomputer, various drive circuits, etc., and controls the first and second inverters and the boost converter. The PCU 50 is arranged in the upper part 42u of the second case 42 so as to be located above the motor generators MG1 and MG in the lower part 42l of the second case 42. In the present embodiment, the PCU 50 is attached to a core plate 42p that covers the upper opening of the second case 42.

[0023] Furthermore, the vehicle 1 includes a charger (AC charger) 60 which is an electrical device for charging a battery (not shown) with electric power from an external AC power source such as a household power supply. The charger 60 includes an AC / DC converter that converts AC power into DC power, a DC / DC converter that boosts the DC power output from the AC / DC converter, a charging control device (both not shown) that controls these electrical devices, a case 61 that houses these components, and a cover 62 that is fixed to the case 61. As shown in FIG. 2, the case 61 of the charger 60 is attached (fixed) to the core plate 42p of the second case 42 (case 40) via a first bracket (first support member) 71, a second bracket (second support member) 72, and a third bracket 73 (third support member).

[0024] As shown in FIG. 3, the first bracket 71 is fastened to one end face 61a (end wall) in the longitudinal direction of the case 61 of the charger 60 via a plurality (two in this embodiment) of first vibration isolation bushes (first bushes) 81 and a plurality (two in this embodiment) of first bolts 91. The first bracket 71 is formed of, for example, metal and has a plurality (two in this embodiment) of through holes (not shown) formed so as to be arranged in the width direction of the case 61 (end face 61a). Each first vibration isolation bush 81 is formed hollow by an elastic body such as rubber and is press-fitted into a corresponding through hole of the first bracket 71. Each first bolt 91 is inserted through the hollow portion of the corresponding first vibration isolation bush 81 and screwed into a screw hole formed in the case 61 (end wall). Also, a part of each first vibration isolation bush 81 abuts against the end face 61a of the case 61. Thereby, the contraction direction of each first vibration isolation bush 81 and the extending direction of each first bolt 91 are parallel to the longitudinal direction of the case 61. Furthermore, the first bracket 71 is fixed to the case 40 of the transaxle 20, that is, the core plate 42p of the second case 42 via a plurality of bolts 95 extending in the vertical direction respectively.

[0025] As shown in FIG. 3, the second bracket 72 is fastened to one of the pair of side surfaces 61c, 61d (side walls) of the case 61 that extends longitudinally from one end surface 61a of the case 11 toward the other end surface 61b (see FIG. 4), here the side surface 61c, via a single second vibration isolation bush (second bush) 82 and a single second bolt 92 so as to be close to the other end surface 61b. The second bracket 72 is formed of, for example, metal and has a single through hole (not shown). The second vibration isolation bush 82 is formed hollow by an elastic body such as rubber and is press-fitted into the through hole of the second bracket 72. The second bolt 92 is inserted through the hollow portion of the second vibration isolation bush 82 and screwed into a screw hole formed in the case 61 (side wall). Also, a part of the second vibration isolation bush 82 abuts against the side surface 61c of the case 61. Thereby, the contraction direction of the second vibration isolation bush 82 and the extending direction of the second bolt 92 are parallel to the width direction (direction orthogonal to the longitudinal direction) of the case 61. Further, the second bracket 72 is fixed to the core plate 42p of the second case 42 via a single bolt 96.

[0026] The third bracket 73 is formed of, for example, metal and is fastened to the other of the pair of side surfaces 61c, 61d (side walls) of the case 61, here the side surface 61d, via a single third vibration isolation bush (third bush) 83 and a single third bolt 93 so as to be close to the other end surface 61b as shown in FIG. 4. The third bracket 73 is formed of, for example, metal and has a single through hole (not shown). The third vibration isolation bush 83 is formed hollow by an elastic body such as rubber and is press-fitted into the through hole of the third bracket 73. The third bolt 93 is inserted through the hollow portion of the third vibration isolation bush 83 and screwed into a screw hole formed in the case 61 (side wall). Also, a part of the third vibration isolation bush 83 abuts against the side surface 61d of the case 61. Thereby, the contraction direction of the third vibration isolation bush 83 and the extending direction of the third bolt 93 are parallel to the width direction (direction orthogonal to the longitudinal direction) of the case 61.

[0027] Furthermore, the third bracket 73 is connected (fixed) to the fixing member 74 via one or more bolts 97. The fixing member 74 is fixed to the core plate 42p of the second case 42 via a plurality of bolts 98, whereby the third bracket 73 is fixed (connected) to the core plate 42p. However, the portion corresponding to the fixing member 74 may be integrated with the third bracket 73. Also, in the present embodiment, the second bracket 72 includes an extending portion 72e extending from the side surface 61c side to the side surface 61d side, and the extending portion 72e is fixed to the third bracket 73 via a single bolt 99. Thereby, the second and third brackets 72, 73 are integrally connected to each other. However, the extending portion 72e may be omitted from the second bracket 72, or an extending portion may be formed on the third bracket 73.

[0028] As described above, the mounting structure of the charger 60 as an electrical device in the vehicle 1 includes the first bracket 71, the second bracket 72, and the third bracket 73. The first bracket 71 is fastened to one end face 61a in the longitudinal direction of the case 61 of the charger 60 via a plurality of first vibration isolation bushes 81 and a plurality of first bolts 91, and is fixed to the case 40 (core plate 42p) of the transaxle 20 as the target device. The second bracket 72 is fastened to one side surface 61c of the case 61 (charger 60) extending in the longitudinal direction from the end face 61a via a second vibration isolation bush 82 and a second bolt 92, and is fixed to the case 40 (core plate 42p). The third bracket 73 is fastened to the other side surface 61d of the case 61 of the charger 60 via a third vibration isolation bush 83 and a third bolt 93, and is fixed to the case 40 (core plate 42p).

[0029] As a result, the contraction directions of the plurality of first vibration isolators 81 and the contraction directions of the second and third vibration isolators 82 and 83 can be made substantially orthogonal (intersecting), so that it is possible to suppress an increase in the resonance magnification of the first, second, and third vibration isolators 81, 82, and 83 in a specific frequency range. As a result, in the vehicle 1, the vibration of the charger 60 attached to the transaxle 20 (case 40) as the target device serving as the vibration source can be satisfactorily reduced.

[0030] Further, in the vehicle 1, the second bracket 72 is fastened to one side surface 61c of the case 61 via a single second vibration isolator 82 and a single second bolt 92, and the third bracket 73 is fastened to the other side surface 61d of the case 61 via a single third vibration isolator 83 and a single third bolt 93. Then, the second and third brackets 72 and 73 are connected to each other via a bolt 99. As a result, since the second and third brackets 72 and 73 are mutually constrained, it is possible to regulate the movement of the second and third brackets 72 and 73 caused by the vibration of the transaxle 20 (case 40) and satisfactorily suppress loosening of the second bolt 92 and the third bolt 93.

[0031] Note that the target device to which the charger 60 is attached is not limited to the transaxle 20 (case 40). For example, when the PCU 50 is attached to, for example, a second case 42 outside the case 40 of the transaxle 20, the charger 60 may be attached to the PCU 50. Further, the electric device attached to the target device serving as the vibration source is not limited to the charger 60, and may be, for example, the PCU 50 or the like attached to the case 40 of the transaxle 20 as the target device.

[0032] Furthermore, as shown in FIG. 5, the second bracket 72 may be fastened to one side surface 61c (side wall) of the case 61 via a plurality (e.g., two) of second vibration isolation bushes 82 and a plurality (e.g., two) of second bolts 92, and the third bracket 73 may be fastened to the other side surface 61d (side wall) of the case 61 via a plurality (e.g., two) of third vibration isolation bushes 83 and a plurality (e.g., two) of third bolts 93. Also, in the example of FIG. 5, the second bracket 72 and the third bracket 73 are not connected to each other.

[0033] In the mounting structure shown in FIG. 5, when the case 40 of the transaxle 20 as the target device vibrates, the movement of the second bracket 72 relative to the charger 60 (case 61) can be restricted by the plurality of second bolts 92, and the movement of the third bracket 73 relative to the charger 60 (case 61) can be restricted by the plurality of third bolts 93. Thereby, even if the second and third brackets 72, 73 are not connected to each other, it becomes possible to satisfactorily suppress loosening of the second bolts 92 and the third bolts 93.

[0034] And the invention of the present disclosure is not limited to the above-described embodiments at all, and it goes without saying that various changes can be made within the scope of the extension of the present disclosure. Furthermore, the above-described embodiments are merely specific forms of the invention described in the summary section of the invention, and do not limit the elements of the invention described in the summary section of the invention.

Industrial Applicability

[0035] The invention of the present disclosure can be used in the manufacturing industry of electrical equipment and the like.

Explanation of Reference Numerals

[0036] 1 Vehicle, 20 Transaxle, 40 Case, 42 Second Case, 42p Core Plate, 50 Power Control Unit (PCU), 60 Charger, 61 Case, 61a End Face, 61c, 61d Side Faces, 71 First Bracket, 72 Second Bracket, 72e Extension Portion, 73 Third Bracket, 74 Fixing Member, 81 First Vibration Isolation Bush, 82 Second Vibration Isolation Bush, 83 Third Vibration Isolation Bush, 91 First Bolt, 92 Second Bolt, 93 Third Bolt, 95, 96, 97, 98, 99 Bolts.

Claims

1. An attachment structure for an electrical device for attaching an electrical device to a target device serving as an oscillation source, comprising: a first support member that is fastened to one end face in the longitudinal direction of the electrical device via a plurality of first bushes and a plurality of first bolts and is fixed to the target device; a second support member that is fastened to one of a pair of side faces of the electrical device extending in the longitudinal direction from the one end face via a second bush and a second bolt and is fixed to the target device; a third support member that is fastened to the other of the pair of side faces of the electrical device via a third bush and a third bolt and is fixed to the target device; The attachment structure of the electrical device comprising the above.

2. In the attachment structure of the electrical device according to Claim 1, the second support member is fastened to the one of the pair of side faces via a single second bush and a single second bolt, the third support member is fastened to the other of the pair of side faces via a single third bush and a single third bolt, The attachment structure of the electrical device, wherein the second and third support members are connected to each other.

3. In the attachment structure of the electrical device according to Claim 1, the second support member is fastened to the one of the pair of side faces via a plurality of second bushes and a plurality of second bolts, The attachment structure of the electrical device, wherein the third support member is fastened to the other of the pair of side faces via a plurality of third bushes and a plurality of third bolts.

4. In the attachment structure of the electrical device according to any one of Claims 1 to 3, the target device is a transaxle mounted on a vehicle and including at least an electric motor or another device attached to the transaxle, The attachment structure of the electrical device, wherein the electrical device is a charger used for charging a battery that exchanges power with the electric motor.

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