Mounting bracket

Abstract

The internal combustion engine-side mounting bracket (6) is made of metal and has a plurality of mounting parts (10). The attachment section (10) is configured from a protruding section having a semi-cylindrical cross-section and protruding toward the front side of the end surface of the one end side of the internal combustion engine (1). The internal combustion engine-side mounting bracket (6) has a plurality of mounting parts (10), so that the cross-sectional shape of the plurality of mounting parts (10) is not increased, the mounting bracket can be compactly formed with high rigidity, and the vehicle mounting performance can be improved.

Description

Technical Field

[0001] The present invention relates to a mounting bracket for mounting an internal combustion engine to a vehicle body. Background Art

[0002] For example, Patent Document 1 discloses a resin front cover having an integrally formed mounting portion for mounting an internal combustion engine on a vehicle body.

[0003] However, the front cover of Patent Document 1 is made of resin, so if the rigidity of the mounting portion is to be ensured, the cross-sectional shape of the mounting portion needs to be enlarged, which may deteriorate the mountability on the vehicle.

[0004] Patent Document 1: International Publication No. 2020 / 183687 Summary of the invention

[0005] The mounting bracket of the present invention has a plurality of mounting portions for mounting an internal combustion engine on a vehicle body, wherein the plurality of mounting portions are formed of bulging portions that protrude toward the front side of an end surface on one end side of the internal combustion engine.

[0006] The mounting bracket has a plurality of mounting portions formed of bulging portions, and can be formed compactly with high rigidity, thereby improving vehicle mountability. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is an explanatory diagram schematically showing the general structure of an internal combustion engine to which the present invention is applied.

[0008] Figure 2 It is a front view of the internal combustion engine with the internal combustion engine side mounting bracket installed.

[0009] Figure 3 It is an exploded perspective view of a front cover mounted on an internal combustion engine and a mounting bracket on the internal combustion engine side.

[0010] Figure 4 This is a rear view of the engine-side mounting bracket.

[0011] Figure 5 This is a perspective view of the internal combustion engine side mounting bracket viewed from the back side.

[0012] Figure 6 This is a perspective view of the internal combustion engine side mounting bracket viewed from the back side. DETAILED DESCRIPTION

[0013] Hereinafter, an embodiment of the present invention will be described in detail based on the accompanying drawings. In addition, the X-axis in each figure represents the axis along the front-rear direction of the internal combustion engine 1 (the axis parallel to the central axis of the crankshaft of the internal combustion engine 1), the Y-axis represents the axis along the left-right direction of the internal combustion engine 1 (the width direction of the internal combustion engine), and the Z-axis represents the axis along the up-down direction of the internal combustion engine 1 (the axis parallel to the cylinder axis A of the internal combustion engine 1).

[0014] Figure 1 It is an explanatory diagram schematically showing the general structure of an internal combustion engine 1 to which the present invention is applied.

[0015] The internal combustion engine 1 is, for example, a multi-cylinder internal combustion engine in series, and comprises: a cylinder head 2; a cylinder block 3 mounted on the lower portion of the cylinder head 2; a cam bracket 4 mounted on the upper portion of the cylinder head 2; a front cover 5 covering the front surface of the internal combustion engine 1; and a metal internal combustion engine side mounting bracket 6 located on the front surface of the front cover 5. In addition, Figure 1 Reference numeral 7 is a vehicle body side mounting bracket fixed to the vehicle body side.

[0016] The cylinder head 2 is a casting made of a metal material such as aluminum alloy, and is formed with an intake port (not shown) for supplying intake air to a combustion chamber (not shown) and an exhaust port (not shown) for discharging exhaust gas from the combustion chamber (not shown).

[0017] The cylinder block 3 is a cast product made of a metal material such as an aluminum alloy, and is formed with cylinder blocks (not shown) whose number corresponds to the number of cylinders.

[0018] The cam carrier 4 is made of a metal material such as an aluminum alloy, and rotatably supports a cam shaft (not shown) together with the cylinder head 2 .

[0019] The front cover 5 is made of a synthetic resin material such as polyamide, and is mounted on the internal combustion engine body in a manner that covers the front surface of the internal combustion engine body. Specifically, the front cover 5 is mounted on the front surface of the cylinder block 3, the front surface of the cylinder head 2, and the front surface of the cam bracket 4, etc., using bolts not shown. In other words, the front cover 5 is configured to cover the end surface of the cylinder block 3 and the cylinder head 2 on one end side in the crankshaft axis direction, that is, the end surface of the cylinder row direction of the internal combustion engine body. In addition, the front cover 5 can be a casting made of a metal material such as an aluminum alloy.

[0020] The space formed between the front cover 5 and the front surface of the internal combustion engine body accommodates a crankshaft sprocket (not shown) fixed to the front end of the crankshaft (not shown) and a cam sprocket (not shown) fixed to the front end of the camshaft (not shown). A timing chain (not shown) for rotating power transmission is hung around the crankshaft sprocket and the cam sprocket.

[0021] The internal combustion engine side mounting bracket 6 corresponds to a mounting bracket and is mounted on an end surface of one end side of the cylinder bank direction of the internal combustion engine 1. The internal combustion engine side mounting bracket 6 is, for example, a casting made of a metal material such as an aluminum alloy. Figure 2 and Figure 3 As shown, the engine-side mounting bracket 6 is mounted to the end surfaces of the cylinder head 2 and one end of the cylinder block 3 by six bolts 8, namely, the first bolt 8a to the sixth bolt 8f. The bolts 8 penetrate the bolt bosses 9 of the engine-side mounting bracket 6.

[0022] like Figure 2 and Figure 3 As shown, the internal combustion engine side mounting bracket 6 includes six bolt boss portions 9, namely, a first bolt boss portion 9a to a sixth bolt boss portion 9f. Figure 2 It is a front view of the internal combustion engine 1 to which the internal combustion engine side mounting bracket 6 is mounted. Figure 3 It is an exploded perspective view of the front cover 5 mounted on the internal combustion engine 1 and the internal combustion engine side mounting bracket 6 .

[0023] The first bolt 8a fixes the upper portion of one end side of the engine width direction of the engine side mounting bracket 6 to the cylinder head 2 outside the front cover 5. The first bolt 8a penetrates the first bolt boss portion 9a of the engine side mounting bracket 6.

[0024] The second bolt 8b penetrates the front cover 5 to fix the upper portion of the engine-side mounting bracket 6 substantially in the center in the engine width direction to the cylinder head 2. The second bolt 8b penetrates the second bolt boss portion 9b of the engine-side mounting bracket 6.

[0025] The third bolt 8c fixes the upper portion of the other end side of the engine width direction of the engine side mounting bracket 6 to the cylinder head 2 outside the front cover 5. The third bolt 8c penetrates the third bolt boss portion 9c of the engine side mounting bracket 6.

[0026] The fourth bolt 8d fixes the lower portion of one end in the engine width direction of the engine-side mounting bracket 6 to the cylinder block 3 outside the front cover 5. The fourth bolt 8d penetrates the fourth bolt boss portion 9d of the engine-side mounting bracket 6.

[0027] The fifth bolt 8e penetrates the front cover 5 and fixes the lower portion of the engine-side mounting bracket 6 substantially in the center in the engine width direction to the cylinder block 3. The fifth bolt 8e penetrates the fifth bolt boss portion 9e of the engine-side mounting bracket 6.

[0028] The sixth bolt 8f fixes the lower portion of the other end in the engine width direction of the engine-side mounting bracket 6 to the cylinder block 3 outside the front cover 5. The sixth bolt 8f penetrates the sixth bolt boss portion 9f of the engine-side mounting bracket 6.

[0029] like Figure 2 and Figure 3 As shown, the internal combustion engine side mounting bracket 6 has a plurality (three) mounting portions 10. The mounting portion 10 is used to mount the internal combustion engine 1 to the vehicle body, and the upper end surface 11 is fixed to the vehicle body side mounting bracket 7 by bolts (not shown).

[0030] The mounting portion 10 is formed of a bulging portion with a semi-cylindrical cross-section that protrudes toward the front side of the end surface of one end side of the internal combustion engine 1. That is, the mounting portion 10 is hollowed out from the inner wall. Here, the front side of the end surface of one end side of the internal combustion engine 1 refers to the front side of the internal combustion engine 1, Figure 1 The left side of Figure 2 The mounting portion 10 is formed to extend in the vertical direction along the cylinder axis A of the internal combustion engine 1. That is, the mounting portion 10 is elongated in the vertical direction, and its upper end surface 11 is fixed to the vehicle body side mounting bracket 7. The upper end surface 11 is formed to remain horizontal when the internal combustion engine 1 is mounted on the vehicle body.

[0031] The mounting portion 10 provided on the internal combustion engine side mounting bracket 6 is a first mounting portion 10a located at one end side of the internal combustion engine width direction of the internal combustion engine side mounting bracket 6, a second mounting portion 10b located at the other end side of the internal combustion engine width direction of the internal combustion engine side mounting bracket 6, and a third mounting portion 10c located at the center of the internal combustion engine width direction of the internal combustion engine side mounting bracket 6. The first mounting portion 10a and the second mounting portion 10b are a pair of mounting portions located at both sides in the internal combustion engine width direction.

[0032] The upper end surface 11a of the first mounting portion 10a is fixed to the vehicle body side mounting bracket 7. Figure 2 As shown in FIG. 1 , the first mounting portion 10a is formed to extend in the up-down direction along the cylinder axis A of the internal combustion engine 1, and its center line C1 in the up-down direction is inclined relative to the cylinder axis A parallel to the Z axis. Specifically, the first mounting portion 10a is formed to be inclined so that the lower end located on the lower side of the internal combustion engine side mounting bracket 6 is located closer to one end in the internal combustion engine width direction than the upper end (upper end surface 11a) located on the upper side of the internal combustion engine side mounting bracket 6.

[0033] The first mounting portion 10a is formed so that its center line C1 points to the fourth bolt 8d through which the fourth bolt boss 9d passes. That is, the first mounting portion 10a is formed so that its lower end points to the fixing point of the engine-side mounting bracket 6 relative to the internal combustion engine 1.

[0034] Thus, the engine-side mounting bracket 6 can easily support the load applied to the upper end surface 11 a of the first mounting portion 10 a at the fixing point with respect to the internal combustion engine 1 , thereby improving the rigidity as a whole.

[0035] The upper end surface 11b of the second mounting portion 10b is fixed to the vehicle body side mounting bracket 7. Figure 2As shown in FIG. 1 , the second mounting portion 10b is formed to extend in the up-down direction along the cylinder axis A of the internal combustion engine 1, and its center line C2 in the up-down direction is inclined relative to the cylinder axis A parallel to the Z axis. Specifically, the second mounting portion 10b is formed to be inclined so that the lower end located on the lower side of the internal combustion engine side mounting bracket 6 is located closer to the other end side in the internal combustion engine width direction than the upper end (upper end surface 11b) located on the upper side of the internal combustion engine side mounting bracket 6.

[0036] The second mounting portion 10b is formed so that its center line C2 points to the sixth bolt 8f that penetrates the sixth bolt boss 9f. That is, the second mounting portion 10b is formed so that its lower end points to the fixing point of the engine-side mounting bracket 6 relative to the internal combustion engine 1.

[0037] Thus, the engine-side mounting bracket 6 can easily support the load applied to the upper end surface 11 b of the second mounting portion 10 b at the fixing point with respect to the internal combustion engine 1 , thereby improving the rigidity as a whole.

[0038] The upper end surface 11c of the third mounting portion 10c is fixed to the vehicle body side mounting bracket 7. Figure 2 As shown in FIG. 1 , the third mounting portion 10c is formed to extend in the up-down direction along the cylinder axis A of the internal combustion engine 1, and its center line C3 in the up-down direction is inclined relative to the cylinder axis A parallel to the Z axis. Specifically, the third mounting portion 10c is formed to be inclined so that the lower end located on the lower side of the internal combustion engine side mounting bracket 6 is located closer to one end in the internal combustion engine width direction than the upper end (upper end surface 11c) located on the upper side of the internal combustion engine side mounting bracket 6.

[0039] The third mounting portion 10c is formed so that its center line C3 points to the fifth bolt 8e passing through the fifth bolt boss 9e. That is, the third mounting portion 10c is formed so that its lower end points to the fixing point of the internal combustion engine side mounting bracket 6 relative to the internal combustion engine 1.

[0040] Thus, the internal combustion engine side mounting bracket 6 can easily support the load applied to the upper end surface 11 c of the third mounting portion 10 c at the fixing point with respect to the internal combustion engine 1 , thereby improving the rigidity as a whole.

[0041] In addition, the interval between the first mounting portion 10a and the second mounting portion 10b along the width direction of the internal combustion engine is formed so as to be larger (increased) toward the lower side in the vertical direction along the cylinder axis A of the internal combustion engine 1. The interval between the first mounting portion 10a and the third mounting portion 10c along the width direction of the internal combustion engine is formed so as to be larger (increased) toward the lower side in the vertical direction along the cylinder axis A of the internal combustion engine 1.

[0042] The interval between the second mounting portion 10 b and the third mounting portion 10 c along the engine width direction is formed to be larger (increased) toward the lower side in the vertical direction along the cylinder axis A of the internal combustion engine 1 .

[0043] like Figures 4 to 6 As shown, the mounting bracket 6 on the internal combustion engine side has a plurality of ribs 12 . Figure 4 It is a rear view of the internal combustion engine side mounting bracket 6. Figure 5 and Figure 6 This is a perspective view of the internal combustion engine side mounting bracket 6 as viewed from the back side (rear side).

[0044] The rib 12 is used to improve the rigidity of the internal combustion engine side mounting bracket 6, and connects the fixing points of the internal combustion engine side mounting bracket 6 with respect to the internal combustion engine 1, or the mounting portion 10 and the fixing point of the internal combustion engine side mounting bracket 6 with respect to the internal combustion engine 1. In other words, the rib 12 connects the bolt boss portions 9 with each other, or the mounting portion 10 and the bolt boss portion 9. The rib 12 is a convex strip formed to protrude from the back surface of the internal combustion engine side mounting bracket 6 toward one end surface side of the internal combustion engine 1, and is formed, for example, solid.

[0045] In the present embodiment, the internal combustion engine-side mounting bracket 6 is provided with ten ribs 12 , namely, the first rib 12 a to the tenth rib 12 j .

[0046] The first rib 12a corresponds to an upper rib, extends linearly in the engine width direction, and connects the first bolt boss portion 9a and the second bolt boss portion 9b. The first rib 12a is connected to the upper end of the first mounting portion 10a.

[0047] The second rib 12b corresponds to the upper rib, extends linearly in the engine width direction, and connects the second bolt boss 9b and the third bolt boss 9c. In addition, the second rib 12b is connected to the upper end of the second mounting portion 10b and the upper end of the third mounting portion 10c.

[0048] The third rib 12c corresponds to the lower rib, extends linearly and obliquely in the engine width direction, and connects the fourth bolt boss 9d and the fifth bolt boss 9e. In addition, the third rib 12c is connected to the lower end of the first mounting portion 10a and the lower end of the third mounting portion 10c.

[0049] The fourth rib 12d corresponds to the lower rib, extends linearly and obliquely in the engine width direction, and connects the fifth bolt boss 9e and the sixth bolt boss 9f. In addition, the fourth rib 12d is connected to the lower end of the second mounting portion 10b and the lower end of the third mounting portion 10c.

[0050] The fifth rib 12e extends linearly along the vertical direction along the cylinder axis A of the internal combustion engine 1 to connect the first bolt boss portion 9a and the fourth bolt boss portion 9d. The fifth rib 12e is connected to the lower end of the first mounting portion 10a.

[0051] The sixth rib 12f extends linearly and obliquely in the vertical direction along the cylinder axis A of the internal combustion engine 1, connecting the second bolt boss portion 9b and the fifth bolt boss portion 9e. The sixth rib 12f is connected to the upper end of the first mounting portion 10a and the lower end of the third mounting portion 10c.

[0052] The seventh rib 12g extends in the up-down direction along the cylinder axis A of the internal combustion engine 1, and connects the third bolt boss portion 9c and the sixth bolt boss portion 9f. The up-down direction is along the cylinder axis A of the internal combustion engine 1. The seventh rib 12g is formed so as to be curved in an arc shape toward the outside of the internal combustion engine 1 in the internal combustion engine width direction relative to the second mounting portion 10b, and the upper end is connected to the upper end of the second mounting portion 10b, and the lower end is connected to the lower end of the second mounting portion 10b.

[0053] The eighth rib 12h extends linearly and obliquely in the vertical direction along the cylinder axis A of the internal combustion engine 1 to connect the second bolt boss portion 9b and the fourth bolt boss portion 9d. The eighth rib 12h is connected to the upper and lower ends of the first mounting portion 10a.

[0054] The ninth rib 12i extends linearly and obliquely in the vertical direction along the cylinder axis A of the internal combustion engine 1, connecting the second bolt boss portion 9b and the sixth bolt boss portion 9f. The ninth rib 12i is connected to the upper end of the first mounting portion 10a and the lower end of the second mounting portion 10b.

[0055] The tenth rib 12j extends linearly and obliquely in the vertical direction along the cylinder axis A of the internal combustion engine 1 to connect the upper end of the second mounting portion 10b and the fifth bolt boss portion 9e. The tenth rib 12j is formed to cross the third mounting portion 10c.

[0056] The internal combustion engine side mounting bracket 6 of the above-mentioned embodiment is made of metal and has a plurality of mounting portions 10a to 10c formed by bulging portions protruding toward the front side of the end face of one end side of the internal combustion engine 1. Therefore, the cross-sectional shape of each mounting portion 10a to 10c will not be increased, and it can be formed with high rigidity and compactness, which can improve the vehicle mounting performance.

[0057] The mounting portion 10 is formed to extend in the vertical direction along the cylinder axis A of the internal combustion engine 1. Therefore, the internal combustion engine side mounting bracket 6 can improve the vertical rigidity and can efficiently achieve both high rigidity and compactness.

[0058] The mounting portion 10 is formed to extend in the up-down direction along the cylinder axis A of the internal combustion engine 1, and its center line C in the up-down direction is inclined relative to the cylinder axis A parallel to the Z axis. Therefore, the internal combustion engine side mounting bracket 6 can improve the rigidity of the internal combustion engine 1 in the left-right direction viewed in the crankshaft axial direction, and can effectively achieve both high rigidity and compactness.

[0059] The lower ends of the adjacent mounting portions 10 are connected to each other at the inner side by ribs 12 in the vertical direction along the cylinder axis A of the internal combustion engine 1 .

[0060] In detail, the upper end of the first mounting portion 10a and the upper end of the third mounting portion 10c are connected by the first rib 12a and the second rib 12b. The lower end of the first mounting portion 10a and the lower end of the third mounting portion 10c are connected by the third rib 12c. That is, the first mounting portion 10a and the third mounting portion 10c are connected to each other by the first rib 12a, the second rib 12b and the third rib 12c. In addition, the upper end of the second mounting portion 10b and the upper end of the third mounting portion 10c are connected by the second rib 12b. The lower end of the second mounting portion 10b and the lower end of the third mounting portion 10c are connected by the fourth rib 12d. That is, the second mounting portion 10b and the third mounting portion 10c are connected to each other by the second rib 12b and the fourth rib 12d.

[0061] As a result, the internal combustion engine side mounting bracket 6 can further efficiently improve the left-right rigidity of the internal combustion engine 1 as viewed in the crankshaft axial direction, and can more efficiently achieve both high rigidity and compactness.

[0062] The engine-side mounting bracket 6 is formed such that a contour line P connecting the plurality of mounting portions 10 and the plurality of ribs 12 is continuous in an annular shape when viewed in the crankshaft axial direction of the internal combustion engine 1 .

[0063] In detail, regarding the internal combustion engine side mounting bracket 6, when observed in the axial direction of the crankshaft of the internal combustion engine 1, the first rib 12a and the second rib 12b that connect the upper ends of the multiple mounting parts 10a, 10b, 10c in the vertical direction along the cylinder axis A of the internal combustion engine 1 on the inner side, the third rib 12c and the fourth rib 12d that connect the lower ends of the multiple mounting parts 10a, 10b, 10c in the vertical direction along the cylinder axis A of the internal combustion engine 1 on the inner side, and the first mounting part 10a and the second mounting part 10b located on both sides of the internal combustion engine width direction orthogonal to the cylinder row direction of the internal combustion engine 1. The contour line P formed by connecting the upper ends of the multiple mounting parts 10a, 10b, 10c and the lower ends of the multiple mounting parts 10a, 10b, 10c are formed to be continuous in a ring shape.

[0064] Thus, the internal combustion engine side mounting bracket 6 can make the contour line P connecting the plurality of mounting portions 10a, 10b, 10c and the plurality of ribs 12a, 12b, 12c, 12d continuous in a ring shape, and thus can further effectively improve the rigidity.

[0065] Furthermore, since the fixing points of the internal combustion engine side mounting bracket 6 with respect to the internal combustion engine 1 are connected to each other by the fifth to tenth ribs 12e, 12f, 12g, 12h, 12i, and 12j, the rigidity can also be improved thereby.

[0066] Although specific embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention.

[0067] For example, the number of mounting portions 10 is not limited to three, and may be set according to the number of vehicle body side mounting brackets 7. That is, when, for example, four vehicle body side mounting brackets 7 are set to fix the front surface side (front end side) of the internal combustion engine body to the vehicle body, the number of mounting portions 10 is four.

[0068] The engine-side mounting bracket 6 may be formed such that the center line C of at least one of the plurality of mounting portions 10 along the vertical direction is inclined relative to the cylinder axis A parallel to the Z axis, and the remaining center lines are parallel to the Z axis.

[0069] The mounting portion 10 may be formed so that its center line C points to the bolt boss portion 9. Also, the mounting portion 10 may be formed so that its center line C does not point to the bolt 8 or the bolt boss portion 9.

Claims

1. A mounting bracket mounted on an end surface of one end side of a cylinder bank direction of an internal combustion engine, wherein: The mounting bracket has a plurality of mounting portions for mounting the internal combustion engine on a vehicle body. The plurality of mounting portions are formed of bulging portions that protrude forward of an end surface on one end side of the internal combustion engine.

2. The mounting bracket according to claim 1, wherein: The plurality of mounting portions are formed to extend in a vertical direction along a cylinder axis of the internal combustion engine.

3. The mounting bracket of claim 2, wherein: At least one of the plurality of mounting portions is formed such that a center line thereof along the vertical direction is inclined relative to a cylinder axis line when viewed in the crankshaft axial direction of the internal combustion engine.

4. The mounting bracket according to claim 2 or 3, wherein: The mutually adjacent mounting portions are connected to each other by ribs.

5. The mounting bracket according to claim 2 or 3, wherein: The mounting bracket has a plurality of ribs connected to the plurality of mounting portions. When viewed in the axial direction of the crankshaft of the internal combustion engine, a contour line connecting the plurality of mounting portions and the plurality of ribs is formed to be continuous in an annular shape.

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