Equipment mounting structure

Abstract

To properly fit power conversion equipment to a vehicle.SOLUTION: An equipment fitting structure has: a vehicle side member which is provided on a vehicle, and in which a first screw and a second screw are formed; and an equipment side member which is provided on power conversion equipment, and in which a first through hole and a second through hole are formed. The equipment fitting structure has: a first bushing comprising a first outer sleeve and a first inner sleeve; and a second bushing comprising a second outer sleeve and a second inner sleeve. The equipment fitting structure has: a first fastening member which is attached to the first screw, and fastens the first inner sleeve to the vehicle side member; and a second fastening member which is attached to the second screw, and fastens the second inner sleeve to the vehicle side member. The first through hole formed in the equipment side member includes a large diameter hole part which opens on a first face, and into which the first outer sleeve fits. The second through hole formed in the equipment side member includes a large diameter hole part which opens on a second face, and into which the second outer sleeve fits.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a device mounting structure for mounting a power conversion device on a vehicle.

Background Art

[0002] Vehicles such as electric vehicles and hybrid vehicles are equipped with power conversion devices such as inverters, converters, and on-vehicle chargers (see Patent Documents 1 to 3). Further, in order to reduce the vibration transmission from a power conversion device such as an inverter to a vehicle body or the like, a rubber bush or the like is used for the mounting structure of the power conversion device to the vehicle.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, since a power conversion device such as an inverter is a heavy object, even when an attachment structure using a rubber bush or the like is adopted, it is required to appropriately attach the power conversion device to the vehicle. That is, even when a strong force such as a vehicle collision acts, it is required to appropriately attach the power conversion device to the vehicle so that the power conversion device does not fall off from the vehicle.

[0005] An object of the present invention is to appropriately attach a power conversion device to a vehicle.

Means for Solving the Problems

[0006] The device mounting structure according to one embodiment is a device mounting structure for mounting a power conversion device on a vehicle, comprising a vehicle side member provided on the vehicle and having a first screw and a second screw formed thereon, a device side member provided on the power conversion device and having a first through hole and a second through hole formed therein, a first outer sleeve fitted into the first through hole, a first inner sleeve connected to the inside of the first outer sleeve via an elastic body, a first bush including the first outer sleeve and the first inner sleeve, a second outer sleeve fitted into the second through hole, a second inner sleeve connected to the inside of the second outer sleeve via an elastic body, a second bush including the second outer sleeve and the second inner sleeve, a first fastening member attached to the first screw of the vehicle side member and fastening the first inner sleeve to the vehicle side member, and a second fastening member attached to the second screw of the vehicle side member and fastening the second inner sleeve to the vehicle side member. The device side member includes a first surface facing the vehicle side member and a second surface located on the side opposite to the first surface. The first through hole formed in the device side member includes a large-diameter hole portion that opens to the first surface and into which the first outer sleeve is fitted, and a small-diameter hole portion that opens to the second surface and through which the first inner sleeve passes. The second through hole formed in the device side member includes a large-diameter hole portion that opens to the second surface and into which the second outer sleeve is fitted, and a small-diameter hole portion that opens to the first surface and through which the second inner sleeve passes.

Effect of the Invention

[0007] The device mounting structure according to one embodiment has a device side member provided on the power conversion device and having a first through hole and a second through hole formed therein. The first through hole of the device side member includes a large-diameter hole portion that opens to the first surface and into which the first outer sleeve is fitted, and the second through hole of the device side member includes a large-diameter hole portion that opens to the second surface and into which the second outer sleeve is fitted. Thereby, the power conversion device can be appropriately mounted on the vehicle.

Brief Description of the Drawings

[0008]

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Mode for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, the same or substantially the same configurations and elements are denoted by the same reference numerals, and repeated descriptions are omitted.

[0010] [Vehicle Structure] FIG. 1 is a diagram showing an example of a hybrid vehicle 11 equipped with a device mounting structure 10 according to an embodiment of the present invention. As shown in FIG. 1, a power train 14 including an engine 12 and a transmission 13 is mounted on a hybrid vehicle (vehicle) 11. A motor generator MG and a front differential mechanism 16 are incorporated in the transmission 13. Further, the front wheels 17 are connected to the engine 12 and the motor generator MG via the front differential mechanism 16, and the rear wheels 21 are connected via a rear wheel output shaft 18, a propeller shaft 19, and a rear differential mechanism 20. Note that the illustrated vehicle 11 is an all-wheel drive vehicle, but the present invention is not limited thereto, and it may be a front-wheel drive vehicle or a rear-wheel drive vehicle.

[0011] An intake manifold 22 for guiding intake air is attached to the upper part of the engine 12, and a power conversion unit 23, which is a power conversion device, is attached behind the intake manifold 22. A battery 25 such as a lithium-ion battery is connected to the power conversion unit 23 via a power cable 24. The power conversion unit 23 incorporates an inverter (not shown) for controlling the energization state of the motor generator MG, a boost converter (not shown) for boosting the DC power from the battery 25, and the like. When the motor generator MG is controlled to be in the power running state, the DC power from the battery 25 is converted into AC power via the power conversion unit 23 and supplied to the motor generator MG. On the other hand, when the motor generator MG is controlled to be in the power generation state, the AC power from the motor generator MG is converted into DC power via the power conversion unit 23 and supplied to the battery 25.

[0012] [Device mounting structure] Next, the mounting structure (equipment mounting structure) 10 of the power conversion unit 23 to the engine 12 will be described. FIG. 2 is a view showing the power train 14 arranged in the engine room 26 from above, and FIG. 3 is an enlarged view showing the power conversion unit 23 shown in FIG. 2 and its vicinity. Further, FIG. 4 is a view showing the power conversion unit 23 and its vicinity from the direction of arrow A in FIG. 2.

[0013] As shown in FIG. 2, an intake manifold 22 and a power conversion unit 23 are attached to the upper part of the engine 12. Further, a surge tank 27 is provided in the intake manifold 22, and this surge tank 27 is arranged in front of the power conversion unit 23. Furthermore, four branches 28 extend from the surge tank 27 of the intake manifold 22, and some of the branches 28 are arranged in the vicinity of both end portions 23a, 23b of the power conversion unit 23. As shown in FIGS. 3 and 4, an engine bracket (vehicle side member) 31 is attached to the engine 12 mounted on the vehicle 11 by fastening bolts 30 and the like. Also, an equipment bracket (equipment side member) 33 is attached to the power conversion unit 23 by fastening bolts 32 and the like. Furthermore, the engine bracket 31 and the equipment bracket 33 are fastened to each other using four mounting mechanisms 40, 50 described later. That is, the illustrated power conversion unit 23 is attached to the vehicle 11 using four mounting mechanisms 40, 50.

[0014] FIG. 5 is a cross-sectional view showing the mounting mechanisms 40 and 50 along the line B-B in FIG. 3. FIGS. 6 to 8 are diagrams showing the mounting procedure of the power conversion unit 23 to the engine bracket 31. As shown in FIG. 6, the equipment bracket 33 is formed with a first through hole 41 and a second through hole 51 penetrating in the thickness direction. The first through hole 41 is composed of a large-diameter hole portion 41a opening to the lower surface (first surface) 33a of the equipment bracket 33 and a small-diameter hole portion 41b opening to the upper surface (second surface) 33b of the equipment bracket 33. Further, the second through hole 51 is composed of a large-diameter hole portion 51a opening to the upper surface 33b of the equipment bracket 33 and a small-diameter hole portion 51b opening to the lower surface 33a of the equipment bracket 33. As shown in FIG. 5, the lower surface 33a of the equipment bracket 33 is the surface facing the engine bracket 31, and the upper surface 33b of the equipment bracket 33 is the surface located on the opposite side of the lower surface 33a.

[0015] As shown in FIG. 6, a first bush 42 is press-fitted into the first through hole 41 of the equipment bracket 33 from below. The first bush 42 has a first outer sleeve 43, a first inner sleeve 44 disposed inside the first outer sleeve 43, and an elastic body 45 made of rubber connecting the first outer sleeve 43 and the first inner sleeve 44. As shown in FIG. 7, the first outer sleeve 43 is fitted into the large-diameter hole portion 41a, and the first inner sleeve 44 penetrates the small-diameter hole portion 41b. On the other hand, as shown in FIG. 6, a second bush 52 is press-fitted into the second through hole 51 of the equipment bracket 33 from above. The second bush 52 has a second outer sleeve 53, a second inner sleeve 54 disposed inside the second outer sleeve 53, and an elastic body 55 made of rubber connecting the second outer sleeve 53 and the second inner sleeve 54. As shown in FIG. 7, the second outer sleeve 53 is fitted into the large-diameter hole portion 51a, and the second inner sleeve 54 penetrates the small-diameter hole portion 51b. Thus, when the first bush 42 and the second bush 52 are assembled to the equipment bracket 33, as shown in FIG. 7, the equipment bracket 33 is fixed to the power conversion unit 23 using the fastening bolt 32.

[0016] As shown in FIG. 8, nuts 47 having female threads (first threads) 46 and nuts 57 having female threads (second threads) 56 are welded to an engine bracket 31 attached to the engine 12. In this way, by fixing the nuts 47 and 57 to the engine bracket 31 by welding, female threads 46 and 56 are formed in the engine bracket 31. The equipment bracket 33 of the power conversion unit 23 is mounted on such an engine bracket 31, with the first through hole 41 facing the female thread 46 and the second through hole 51 facing the female thread 56.

[0017] Then, a first fastening bolt (first fastening member, bolt) 48 is inserted into a first inner sleeve 44 from above, and a male thread 48a of the first fastening bolt 48 is tightened to the female thread 46. Thereby, the first inner sleeve 44 of the first bush 42 is fastened to the engine bracket 31 by the first fastening bolt 48. Similarly, a second fastening bolt (second fastening member, bolt) 58 is inserted into a second inner sleeve 54 from above, and a male thread 58a of the second fastening bolt 58 is tightened to the female thread 56. Thereby, the second inner sleeve 54 of the second bush 52 is fastened to the engine bracket 31 by the second fastening bolt 58. Also, a first washer 49 is provided between the head 48b of the first fastening bolt 48 and the first inner sleeve 44, and a second washer 59 is provided between the head 58b of the second fastening bolt 58 and the second inner sleeve 54.

[0018] As described above, one end 23a of the power conversion unit 23 in the vehicle width direction is supported by the first attachment mechanism 40 consisting of the female screw 46, the first through hole 41, the first bushing 42, and the first fastening bolt 48, and is also supported by the second attachment mechanism 50 consisting of the female screw 56, the second through hole 51, the second bushing 52, and the second fastening bolt 58. Furthermore, near the end 23a of the power conversion unit 23, the first attachment mechanism 40 is disposed rearward of the second attachment mechanism 50. Here, FIG. 9 is a cross-sectional view showing the attachment mechanisms 40, 50 along line CC in FIG. 3. As shown in FIG. 9, the other end 23b of the power conversion unit 23 in the vehicle width direction is also supported by the first attachment mechanism 40 consisting of the female screw 46, the first through hole 41, the first bushing 42, and the first fastening bolt 48, and is also supported by the second attachment mechanism 50 consisting of the female screw 56, the second through hole 51, the second bushing 52, and the second fastening bolt 58. Further, in the vicinity of the end 23b of the power conversion unit 23, the first attachment mechanism 40 is disposed further forward of the second attachment mechanism 50 on the vehicle.

[0019] As described above, the engine bracket 31 provided on the vehicle 11 and the equipment bracket 33 provided on the power conversion unit 23 are connected to each other using four attachment mechanisms 40, 50. That is, the engine bracket 31 and the equipment bracket 33 are connected to each other via the elastic bodies 45, 55 of the first bushing 42 and the second bushing 52. By providing the elastic bodies 45, 55 between the engine 12 and the power conversion unit 23 in this manner, it is possible to suppress the transmission of vibration between the engine 12 and the power conversion unit 23. This makes it possible to reduce noise and vibration propagated from the power conversion unit 23 to the vehicle body 60 and the like via the engine 12. It is also possible to protect the power conversion unit 23 from engine vibration.

[0020] Moreover, when attaching the equipment bracket 33 to the engine bracket 31, it is only necessary to tighten the fastening bolts 48 and 58 from above the equipment bracket 33. When removing the equipment bracket 33 from the engine bracket 31, it is only necessary to loosen the fastening bolts 48 and 58 from above the equipment bracket 33. As a result, the operator can easily attach and detach the equipment bracket 33 from the engine bracket 31, and the workability when detaching the power conversion unit 23 from the engine room 26 can be improved. Further, as shown in FIG. 2, near the end portions 23a and 23b of the power conversion unit 23, a branch 28 of the intake manifold 22 is disposed. For this reason, it is difficult to bring a tool close to the power conversion unit 23 from the vehicle width direction. However, as described above, since the structure is such that the fastening bolts 48 and 58 are detached from above the equipment bracket 33, the detachment work of the power conversion unit 23 becomes extremely easy.

[0021] [Prevention of Drop-off of Power Conversion Unit] As described above, the first bush 42 and the second bush 52 are press-fitted into the equipment bracket 33 of the power conversion unit 23. That is, the equipment bracket 33 has a structure in which it is held by the fitting force of the first outer sleeve 43 and the second outer sleeve 53. Here, even when a large force acts on the equipment bracket 33 due to a vehicle collision or the like, it is necessary to prevent the equipment bracket 33, that is, the power conversion unit 23, from dropping off. Therefore, in the equipment mounting structure 10 of the present embodiment, the first bush 42 is press-fitted from the lower surface 33a side of the equipment bracket 33, while the second bush 52 is press-fitted from the upper surface 33b side of the equipment bracket 33. Thereby, the removal direction of the first bush 42 and the removal direction of the second bush 52 can be made different from each other, and a situation where both the first bush 42 and the second bush 52 drop off can be avoided.

[0022] 5 and 9, when the device bracket 33 is pushed upward by the input force during a vehicle collision, the second bushing 52 does not come off the device bracket 33, and the fitted state of the second bushing 52 to the device bracket 33 can be maintained. On the other hand, when the device bracket 33 is pushed downward by the input force during a vehicle collision, the first bushing 42 does not come off the device bracket 33, and the fitted state of the first bushing 42 to the device bracket 33 can be maintained. As a result, even when the power conversion unit 23 is significantly swung by the inertial force during a vehicle collision, both the first bushing 42 and the second bushing 52 do not come off the device bracket 33, and it is possible to prevent the device bracket 33, and therefore the power conversion unit 23, from coming off.

[0023] FIG. 10 illustrates the positions of the attachment mechanisms for attaching the power conversion unit 23 to the engine 12. In FIG. 10, the first attachment mechanism 40 including the first bushing 42 is indicated by a "1" on the bolt head, and the second attachment mechanism 50 including the second bushing 52 is indicated by a "2" on the bolt head. As shown in FIG. 10, the engine bracket 31 and the equipment bracket 33 are provided with a first corner X1 and a second corner X2 at one diagonal position and a third corner X3 and a fourth corner X4 at the other diagonal position. The first attachment mechanism 40 including the first bushing 42 is provided at the first corner X1 and the second corner X2, and the second attachment mechanism 50 including the second bushing 52 is provided at the third corner X3 and the fourth corner X4. In other words, two first attachment mechanisms 40 are disposed at one diagonal position, and two second attachment mechanisms 50 are disposed at the other diagonal position.

[0024] By arranging the first attachment mechanism 40 and the second attachment mechanism 50 in this manner, even when a force acts on the power conversion unit 23 from any direction as indicated by the arrow α, it is possible to prevent the first bushing 42 and the second bushing 52 from falling off the equipment bracket 33, and therefore it is possible to prevent the equipment bracket 33, and therefore the power conversion unit 23, from falling off. That is, it is possible to prevent the first bushing 42 and the second bushing 52 from falling off the equipment bracket 33 not only when the vehicle width direction ends 23a, 23b of the power conversion unit 23 are displaced up and down as indicated by the symbols β1, β2, but also when the front-rear direction ends 23c, 23d of the power conversion unit 23 are displaced up and down as indicated by the symbols β3, β4.

[0025] As described above, the first washer 49 is provided between the head 48b of the first fastening bolt 48 and the first inner sleeve 44, and the second washer 59 is provided between the head 58b of the second fastening bolt 58 and the second inner sleeve 54. This reduces the rotational force transmitted from the first fastening bolt 48 to the first outer sleeve 43 via the first inner sleeve 44, even when the first fastening bolt 48 is being tightened, thereby preventing loosening of the fitted first outer sleeve 43. Similarly, when the second fastening bolt 58 is being tightened, the rotational force transmitted from the second fastening bolt 58 to the second outer sleeve 53 via the second inner sleeve 54 can be reduced, thereby preventing loosening of the fitted second outer sleeve 53. This also prevents the first bushing 42 and the second bushing 52 from falling off.

[0026] [Another embodiment 1] In the above description, the power conversion unit 23 is attached to the engine 12 using two first attachment mechanisms 40 and two second attachment mechanisms 50, but this is not limited to this. That is, the power conversion unit 23 may be attached to the engine 12 using one first attachment mechanism 40 and one second attachment mechanism 50. The power conversion unit 23 may also be attached to the engine 12 using one first attachment mechanism 40 and multiple second attachment mechanisms 50, or the power conversion unit 23 may be attached to the engine 12 using multiple first attachment mechanisms 40 and one second attachment mechanism 50. Furthermore, the power conversion unit 23 may also be attached to the engine 12 using multiple first attachment mechanisms 40 and multiple second attachment mechanisms 50.

[0027] Here, Fig. 11 is a diagram showing an equipment mounting structure 70 according to another embodiment of the present invention. As shown in Fig. 10, a first mounting mechanism 40 and a second mounting mechanism 50 are provided at one end 23a of the power conversion unit 23 in the vehicle width direction. Furthermore, a first mounting mechanism 40 is provided at the other end 23b of the power conversion unit 23 in the vehicle width direction. Even when the equipment bracket 33 is mounted using two first mounting mechanisms 40 and one second mounting mechanism 50, it is possible to prevent both the first bushing 42 and the second bushing 52 from falling off the equipment bracket 33, thereby preventing the equipment bracket 33, i.e., the power conversion unit 23, from falling off. It goes without saying that the equipment bracket 33 may also be mounted using one first mounting mechanism 40 and two second mounting mechanisms 50.

[0028] [Another embodiment 2] In the above description, the power conversion unit 23 is attached to the engine 12. However, this is not limiting and the power conversion unit 23 may be attached to another vehicle-side member. FIG. 12 is a diagram illustrating an equipment mounting structure 80 according to another embodiment of the present invention. FIG. 12 illustrates the equipment mounting structure 80 provided in the engine compartment 26. As shown in FIG. 12, a vehicle body bracket (vehicle-side member) 81 fixed to the vehicle body 60 is provided in the engine compartment 26, and an equipment bracket 33 is attached to the power conversion unit 23. The vehicle body bracket 81 and the equipment bracket 33 are fastened to each other using the first mounting mechanism 40 and the second mounting mechanism 50. In this way, even when the power conversion unit 23 is attached to the vehicle body 60, it is possible to prevent both the first bushing 42 and the second bushing 52 from falling off the equipment bracket 33, and it is possible to prevent the equipment bracket 33, and therefore the power conversion unit 23, from falling off.

[0029] [Another embodiment 3] In the example shown in Fig. 5, the fastening bolts 48, 58 are fastened to the female threads 46, 56 of the engine bracket 31, but this is not limited to this. Here, Fig. 13 is a diagram showing an equipment mounting structure 90 according to another embodiment of the present invention. Note that Fig. 13 shows the same parts as Fig. 5. As shown in Fig. 13, a stud bolt 92 having a male thread (first thread) 91 is fixed to the engine bracket 31, and a stud bolt 94 having a male thread (second thread) 93 is fixed to the engine bracket 31. By fixing the stud bolts 92, 94 to the engine bracket 31 in this manner, the male threads 91, 93 are formed in the engine bracket 31. The equipment bracket 33 of the power conversion unit 23 is mounted on this engine bracket 31, and the stud bolt 92 is inserted into the first through hole 41 and the stud bolt 94 is inserted into the second through hole 51.

[0030] Then, the female thread 96 of the first fastening nut (first fastening member) 95 is tightened against the male thread 91 of the stud bolt 92. As a result, the first inner sleeve 44 of the first bush 42 is fastened to the engine bracket 31 by the first fastening nut 95. Similarly, the female thread 98 of the second fastening nut (second fastening member) 97 is tightened against the male thread 93 of the stud bolt 94. As a result, the second inner sleeve 54 of the second bush 52 is fastened to the engine bracket 31 by the second fastening nut 97. Note that a first washer 49 is provided between the first fastening nut 95 and the first inner sleeve 44, and a second washer 59 is provided between the second fastening nut 97 and the second inner sleeve 54. In this way, even when the stud bolts 92 and 94 are provided on the engine bracket 31 and the fastening nuts 95 and 97 are tightened against the stud bolts 92 and 94, it is possible to function in the same manner as the above-described device mounting structure 10.

[0031] The present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the gist thereof. In the above description, the device mounting structures 10, 70, 80, and 90 are used for the hybrid vehicle 11 equipped with the engine 12, but the present invention is not limited thereto, and the device mounting structures 10, 70, 80, and 90 may be used for vehicles such as electric vehicles not equipped with the engine 12. Further, in the above description, the power conversion unit 23 is attached to the longitudinally mounted engine 12, but the present invention is not limited thereto, and the power conversion unit 23 may be attached to a horizontally mounted engine, or the power conversion unit 23 may be attached to the transmission 13.

[0032] In the foregoing description, the power conversion unit 23 that integrates an inverter and a converter is used as the power conversion device, but it is not limited to this. An inverter may be used as the power conversion device, a converter may be used as the power conversion device, or an in-vehicle charger may be used as the power conversion device. Further, in the example shown in FIG. 8, nuts 47 and 57 having female threads 46 and 56 are welded to the device bracket 33 which is a device-side member, but it is not limited to this, and female threads 46 and 56 may be formed on the base material of the device bracket 33.

Explanation of Signs

[0033] 10 Device mounting structure 11 Hybrid vehicle (vehicle) 23 Power conversion unit (power conversion device) 31 Engine bracket (vehicle-side member) 33 Device bracket (device-side member) 33a Bottom surface (first surface) 33b Top surface (second surface) 40 First mounting mechanism 41 First through hole 41a Large-diameter hole portion 41b Small-diameter hole portion 42 First bush 43 First outer sleeve 44 First inner sleeve 45 Elastic body 46 Female thread (first thread) 48 First fastening bolt (first fastening member, bolt) 49 First washer 50 Second mounting mechanism 51 Second through hole 51a Large-diameter hole portion 51b Small-diameter hole portion 52 Second bush 53 Second outer sleeve 54 Second inner sleeve 55 Elastic body 56 Female thread (second thread) 58 Second fastening bolt (second fastening member, bolt) 59 Second washer 70 Equipment mounting structure 80 Equipment mounting structure 81 Body bracket (vehicle side member) 90 Equipment mounting structure 91 Male screw (first screw) 93 Male screw (second screw) 95 First fastening nut (first fastening member) 97 Second fastening nut (second fastening member)

Claims

1. A device mounting structure for mounting a power conversion device on a vehicle, comprising: a vehicle side member provided on the vehicle and having a first screw and a second screw formed thereon; a device side member provided on the power conversion device and having a first through hole and a second through hole formed therein; a first bush including a first outer sleeve fitted into the first through hole and a first inner sleeve connected to the inside of the first outer sleeve via an elastic body; a second bush including a second outer sleeve fitted into the second through hole and a second inner sleeve connected to the inside of the second outer sleeve via an elastic body; a first fastening member attached to the first screw of the vehicle side member for fastening the first inner sleeve to the vehicle side member; a second fastening member attached to the second screw of the vehicle side member for fastening the second inner sleeve to the vehicle side member; and the device side member includes a first surface facing the vehicle side member and a second surface located on the side opposite to the first surface; the first through hole formed in the device side member includes a large-diameter hole portion that opens to the first surface and into which the first outer sleeve is fitted, and a small-diameter hole portion that opens to the second surface and through which the first inner sleeve passes; the second through hole formed in the device side member includes a large-diameter hole portion that opens to the second surface and into which the second outer sleeve is fitted, and a small-diameter hole portion that opens to the first surface and through which the second inner sleeve passes. A device mounting structure.

2. The device mounting structure according to claim 1, wherein a plurality of first mounting mechanisms each including the first screw, the first through hole, the first bush, and the first fastening member are provided; a plurality of second mounting mechanisms each including the second screw, the second through hole, the second bush, and the second fastening member are provided. A device mounting structure.

3. The device mounting structure according to claim 2, wherein the two first mounting mechanisms are arranged at one diagonal position; the two second mounting mechanisms are arranged at the other diagonal position. A device mounting structure.

4. The device mounting structure according to any one of claims 1 to 3, wherein a first washer is provided between the first fastening member and the first inner sleeve; a second washer is provided between the second fastening member and the second inner sleeve. A device mounting structure.

5. The device mounting structure according to any one of claims 1 to 4, wherein the first screw and the second screw are female screws. The first fastening member and the second fastening member are bolts. Equipment mounting structure.

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