Mounting bracket structure

Abstract

To provide a mount bracket structure capable of being attached to a narrow attachment area.SOLUTION: A mount bracket structure has: a pulley around which an endless belt is wound; and a mount bracket that is provided with a support part that supports the pulley so that it can rotate in a circumferential direction, a first insertion hole through which a first bolt for fastening to the engine is inserted, and a second insertion hole through which a second bolt for fastening to the engine mount is inserted.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a mount bracket structure. [Background technology]

[0002] There is known a technique for mounting a pulley bracket at an appropriate angle relative to an internal combustion engine (hereinafter referred to as an engine) to suppress the generation of abnormal noise and uneven wear of a belt (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-266381 Summary of the Invention [Problem to be solved by the invention]

[0004] In addition to the pulley bracket, a mount bracket that connects the engine to the engine mount may also be attached to the engine, so it is desirable for the engine to have an area large enough to accommodate both the pulley bracket and the mount bracket.

[0005] However, if the engine has a small number of cylinders (for example, two or three cylinders), the area of ​​the side wall corresponding to the cylinder arrangement direction of the engine becomes narrow, and it may not be possible to attach both the pulley bracket and the mounting bracket.

[0006] SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a mount bracket structure that can be attached to a narrow attachment area. [Means for solving the problem]

[0007] The mount bracket structure according to the present invention includes a pulley around which an endless belt is wound, a support portion that supports the pulley rotatably in a circumferential direction, a plurality of first insertion holes through which first bolts for fastening to an engine are inserted, a second insertion hole through which a second bolt for fastening an engine mount is inserted, and a third insertion hole that is located away from a triangular pyramid that virtually connects the first insertion holes and the second insertion holes and through which a rotation shaft of the support portion is inserted, the mount bracket having a box-like shape that suppresses the influence of external forces generated in accordance with the running state of a vehicle on which the engine is mounted. nothing .

[0009] In the above configuration, the mount bracket may include a reinforcing portion that suppresses deformation of the mount bracket due to tension of the endless belt acting on the pulley.

[0010] In the above configuration, Arranged in line on the engine The number of cylinders may be three or less. [Effects of the Invention]

[0011] The mount bracket structure according to the present invention makes it possible to mount the mount bracket in a small mounting area. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a plan view schematically showing a vehicle to which a mount bracket structure is attached. [Figure 2] Fig. 2(a) is a partial perspective view of an engine to which a mount bracket structure according to an embodiment is attached, and Fig. 2(b) is a perspective view of the mount bracket according to the embodiment. [Figure 3] Fig. 3(a) is a partial perspective view of an engine to which a pulley bracket according to a comparative example is attached, Fig. 3(b) is a perspective view of the pulley bracket according to the comparative example, and Fig. 3(c) is a perspective view of the mount bracket according to the comparative example. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0014] As shown in Fig. 1, mount bracket structures 1 and 2 are attached to both the left and right sides of a power unit 50 mounted on a vehicle 5. In Fig. 1, arrow Fr indicates the front side in the longitudinal direction of the vehicle, and arrow Lf indicates the left side in the width direction of the vehicle. The power unit 50 includes an engine 51 and a transmission 52.

[0015] The engine 51 is, for example, a three-cylinder engine in which three cylinders are arranged in a line in series. The engine 51 may be, for example, a V6 engine in which the three cylinders are arranged alternately on the left and right in a V-shape around a single crankshaft, or may be a single-cylinder engine. In the case of a V6 engine, the three cylinders are arranged in a line on one side of the V6 engine, and the engine 51 and transmission 52 are integrated to form a power unit 50. The power unit 50 is supported by being suspended from the body (vehicle body) 7.

[0016] In order to suppress displacement of power unit 50 around the roll axis, the center portion of power unit 50 is also connected to body 7 via mount bracket structure 3. In other words, power unit 50 is supported at three points on body 7. Below, the left mount bracket structure 1 that supports and suspends engine 51 will be described.

[0017] As shown in FIG. 2(a), the mount bracket structure 1 is attached to a side wall of an engine 51 that corresponds to the cylinder arrangement direction of the cylinders. The mount bracket structure 1 has a pulley 10 and a mount bracket 20. An endless power transmission belt 30 is wound around the pulley 10. The pulley 10 guides the power transmission belt 30 to ensure a sufficient winding angle of the power transmission belt 30 relative to a pulley 55, thereby ensuring reliable transmission of driving force. In other words, the pulley 10 is a dummy pulley, such as a pulley for an air-conditioner-less vehicle.

[0018] Pulley 55 is a crankshaft pulley attached to the crankshaft of engine 51. Pulley 55 may also be an accessory pulley attached to the rotating shaft of various accessories such as an air conditioner compressor, a power steering pump, an engine cooling water pump, or an alternator. When engine 51 is running, the operation of engine 51 causes tension of transmission belt 30 to act on pulley 10 in the direction of pulley 55. As a result, pulley 10 is pressed toward pulley 55 while engine 51 is running.

[0019] 2(a) and 2(b), the mount bracket 20 includes a support portion 21 that supports the pulley 10 rotatably in the circumferential direction, a plurality of engine fastening portions 22, a pulley fastening portion 23, and a mount fastening portion 24. The support portion 21 includes, for example, a rotating shaft and a fastener.

[0020] Each of the multiple engine fastening portions 22 has insertion holes 22A, 22B, 22C, and 22D through which a bolt BT is inserted. The insertion holes 22A, 22B, 22C, and 22D are examples of first insertion holes. The mount bracket structure 1 is fastened to the engine 51 by the bolts BT. The pulley fastening portion 23 has an insertion hole 23A through which the rotation shaft of the support portion 21 is inserted. The insertion hole 23A is an example of a third insertion hole. The pulley 10 is fastened to the mount bracket 20 by the fastener of the support portion 21.

[0021] The mount fastening portion 24 is provided with an insertion hole 24A through which a bolt (not shown) is inserted. The insertion hole 24A is an example of a second insertion hole. An engine mount (not shown) is fastened to the mount bracket structure 1 by a bolt inserted through the insertion hole 24A. In this manner, the mount bracket structure 1 is fastened to the engine 51. Furthermore, the engine mount is fastened to the mount bracket structure 1. In other words, the mount bracket structure 1 connects the engine 51 and the engine mount.

[0022] As described above, when the engine 51 is running, the pulley 10 is pressed toward the pulley 55. Because the rotation shaft of the support part 21 to which the pulley 10 is attached is inserted into the insertion hole 23A of the pulley fastening part 23, the tension of the transmission belt 30 also acts on the pulley fastening part 23 via this rotation shaft. In order to suppress deformation of the mount bracket 20 due to such tension, a rib 25 is provided as a reinforcing part between the pulley fastening part 23 and the mount fastening part 24. The rib 25 reinforces the mount bracket 20, making it possible to suppress deformation of the mount bracket 20.

[0023] In addition to the tension described above, external forces in various directions, such as the longitudinal, vertical, and lateral directions, are instantaneously or suddenly generated in the mount bracket structure 1 based on the driving conditions of the vehicle 5 (e.g., curb-riding, sudden braking, sharp turns, etc.). These external forces act on the mount bracket 20 along with tension. The mount bracket 20 is affected by both external forces and tension, but to mitigate these effects, the mount bracket 20 has a box-like shape. This ensures a balance between the effects of external forces and tension on the rigidity of the mount bracket 20. In particular, the mount bracket 20 has a pulley fastening portion 23 located away from a triangular pyramid formed by connecting the insertion holes 22A, 22B, and 22C of the engine fastening portion 22 and the insertion hole 24A of the mount fastening portion 24 at their vertices. The box-like shape of the mount bracket 20 ensures a balance between the effects of tension on the rigidity of the mount bracket 20 caused by the tension of the power transmission belt 30 and the effects of external forces generated depending on the driving conditions of the vehicle.

[0024] Note that as long as the mount bracket structure 1 is provided with the insertion holes 22A, 22B, and 22C, the mount bracket structure 1 can be attached to the engine 51. However, by providing the insertion hole 22D in the mount bracket 20, not only can the mount bracket structure 1 be more firmly fastened to the engine 51 than in a case where the insertion hole 22D is not provided, but also a better balance of rigidity can be ensured.

[0025] 3(a) to 3(c), a comparative example of the mount bracket structure 1 will be described. Note that components similar to those shown in FIGS. 2(a) and 2(b) are basically given the same or corresponding reference numerals, and detailed descriptions thereof will be omitted.

[0026] First, as shown in Fig. 3(a), the pulley 10 is fastened by a bolt BT1 to a pulley bracket 60 attached to a side wall of the engine 51 so as to be rotatable in the circumferential direction. As shown in Fig. 3(b), the pulley bracket 60 includes a plurality of engine fastening portions 62 and a pulley fastening portion 63.

[0027] Each of the engine fastening portions 62 has insertion holes 62A, 62B, and 62C through which a bolt BT2 is inserted. The pulley bracket 60 is fastened to the engine 51 by the bolt BT2. The pulley fastening portion 63 has an insertion hole 63A through which the bolt shaft of the bolt BT1 is inserted. The pulley 10 is fastened to the pulley bracket 60 by the bolt BT1.

[0028] 3(c), the mount bracket 70 to which the engine mount is fastened is separate from the pulley bracket 60. The mount bracket 70 includes a plurality of engine fastening portions 72 and a mount fastening portion 74, similar to the mount bracket 20 according to the embodiment. Each of the plurality of engine fastening portions 72 is provided with insertion holes 72A, 72B, 72C, and 72D through which a bolt BT is inserted. The mount fastening portion 74 is provided with an insertion hole 74A through which a bolt (not shown) is inserted. However, unlike the mount bracket 20 according to the embodiment, the mount bracket 70 does not include the pulley fastening portion 23.

[0029] When attempting to attach the mount bracket 70 together with the pulley bracket 60 to the side wall of the engine 51, there may be insufficient attachment space on the side wall of the engine 51. For example, if the engine 51 has three cylinders, even if an attempt is made to attach both the pulley bracket 60 and the mount bracket 70 to the side wall of the engine 51, the attachment space may be insufficient and too narrow. As a result, even if the pulley bracket 60 can be attached to the side wall of the engine 51, it may be impossible to attach the mount bracket 70.

[0030] Thus, in contrast to the comparative example in which the pulley bracket 60 and the mount bracket 70 are separate bodies, the embodiment realizes a mount bracket 20 that includes the pulley fastening portion 23 and the mount fastening portion 24. This realizes a mount bracket structure 1 in which the pulley 10 and the mount bracket 20 are integrated. With the mount bracket structure 1 according to the embodiment, the mount bracket structure 1 can be attached even if the side wall of the engine 51 has a narrow attachment area.

[0031] Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and various modifications and variations are possible within the scope of the gist of the present invention as described in the claims. [Explanation of symbols]

[0032] 1 Mounting bracket structure 5 vehicles 10 pulleys 20 Mounting bracket 21 Support part 22 Engine fastening 23 Pulley fastening part 24 Mount fastening part 22A, 22B, 22C, 22D, 23A, 24A Insertion holes 30 Transmission belt 51 Engine

Claims

1. A pulley around which the endless belt is wound; a mount bracket having a support portion that supports the pulley rotatably in a circumferential direction, a plurality of first insertion holes through which first bolts for fastening to an engine are inserted, a second insertion hole through which a second bolt for fastening an engine mount is inserted, and a third insertion hole that is located at a position away from a triangular pyramid that virtually connects the first insertion holes and the second insertion holes and through which a rotation shaft of the support portion is inserted, the mount bracket includes a box-like shape that suppresses the influence of external forces generated depending on the running state of the vehicle on which the engine is mounted, Mounting bracket structure.

2. the mount bracket includes a reinforcing portion that suppresses deformation of the mount bracket due to tension of the endless belt acting on the pulley.

2. The mounting bracket structure according to claim 1.

3. The number of cylinders arranged in a row in the engine is three or less.

3. The mounting bracket structure according to claim 1 or 2.

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