JPH079636U - Idler pulley bracket mounting structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an attachment structure of an idler pulley bracket which is not deformed by the reaction force of the belt even if the idler pulley is arranged so as to move in a direction orthogonal to the belt. [Structure] An idler pulley bracket 4 having a guide groove 42 for advancing and retracting the idler pulley 10 toward the belt 9 side.
No. 0 has mounting holes 45 penetrating at predetermined positions laterally of the guide groove 42 at predetermined intervals, and also has a screw hole 36a on the engine 1 side that is aligned with the mounting hole 45 of the idler pulley bracket 40. 36 and a support seat 37 that extends toward the guide groove 42 and abuts against and supports the back surface of the idler pulley bracket 40. A mounting seat 35 is provided, and the outer edge 37a of the support seat 37 of the mounting seat 35 is aligned with the guide groove 42. The end portion of the outer edge 37a is formed in a position shape that is close to the center of the idler pulley 10 and is close to the idler pulley 10.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure for mounting an idler pulley bracket that adjusts the tension of a belt that drives auxiliary equipment mounted on a vehicle engine.

[0002]

[Prior art]

 Conventionally, as an attachment structure of an idler pulley bracket for adjusting the tension of a belt for driving auxiliary equipment mounted on this type of engine, as shown in FIGS. A pulley 3 is attached, and, for example, a first auxiliary device 5 and a second auxiliary device 6 are arranged around the engine 1 via an auxiliary device bracket 4, and pulleys attached to these auxiliary devices 5 and 6 are provided. An endless belt 9 is mounted between the crankshafts 7, 8 and the crank pulley 3 so as to be interlockingly driveable, and the belt 9 extends between the crank pulley 3 and the first auxiliary machine 5. Further, an idler pulley 10 for tension adjustment is arranged via an idler pulley bracket 11 (hereinafter referred to as a pulley bracket) in order to enhance transmission efficiency.

The idler pulley 10 is arranged at a substantially intermediate position between the crank pulley 3 and the first accessory pulley 7, and is arranged to move via a pulley bracket 11 in a direction substantially orthogonal to the belt 9. In this pulley bracket 11, a base mounting portion 12 and a guide portion 13 are formed into a substantially L shape in a plan view, and the side surface thereof has a base mounting portion 12, a guide portion 13 and a tip mounting portion 14 as shown in FIG. The guide groove 15 is formed in a stepped shape, and a guide groove 15 is formed in the central portion of the guide portion 13 in the longitudinal direction. In addition, support portions 17a, 17b of the adjusting screw member 16 are formed on both sides of the lower surface side of the guide portion 13, or only the support portion 17a of the adjusting screw member 16 is formed and rotatably supported. A screw piece member 18, which rotatably pivots the idler pulley 10, is screwed into the member 16.

The screw piece member 18 is formed in a block shape and is provided with a screw portion to be screwed with the adjusting screw member 16, and an axial pin 19 having a diameter slidable in the guide groove 15 is provided on the upper surface side thereof. The idler pulley 10 is rotatably attached to the coaxial pin 19 while being planted. In this way, the base attachment portion 12 of the idler pulley bracket 11 to which the idler pulley 10 is attached is provided with the attachment holes 12a at predetermined intervals, and the tip attachment portion 14 is also provided with the attachment holes 14a. As described above, mounting seats 20 and 21 are formed on the engine block side of the engine 1 corresponding to the mounting portions 12 and 14 formed at both ends of the pulley bracket 11, and are fixed by mounting bolts 22.

[0005]

[Problems to be solved by the device]

 However, the pulley bracket 11 is separated in the orthogonal direction between the crank pulley 3 and the first accessory pulley 7 via the base attachment portions 12 and the tip attachment portions 14 formed on both sides of the elongated guide portion 13. Since the guide groove 15 is mounted through the mounting seats 20 and 21 and the guide groove 15 is disposed in the direction orthogonal to the belt 9, the guide portion 13 has an elongated double-sided support beam structure, and therefore the belt is formed. When a predetermined pressing force P is applied to 9 to adjust the tension of the belt 9 to drive the auxiliary machines 5 and 6 in a linked manner, the belt reaction force constantly applied to the idler pulley 10 against the pulley bracket 11 during driving. As a result of the action of F, the pulley bracket 11 is flexed and deformed as shown in FIG.

The present invention has been made to solve the above-mentioned conventional problems. Even if the idler pulley is arranged so as to move in a direction orthogonal to the belt, it can be deformed by the reaction force of the belt. It is intended to provide a mounting structure for no idler pulley bracket.

[0007]

[Means for Solving the Problems]

 In order to solve the above technical problems, the present invention engages and presses an idler pulley with a belt that is driven by engaging with pulleys of a plurality of auxiliary machines that are provided around the engine crank pulley and the same engine. In the structure for adjusting the tension, the idler pulley bracket having a guide groove for advancing and retracting the idler pulley toward and away from the belt is provided with mounting holes at predetermined positions lateral to the guide groove at predetermined intervals. The mounting seat includes a mounting screw seat on the engine side, which has a screw hole aligned with the mounting hole of the idler pulley bracket, and a support seat which extends to the guide groove side and abuts and supports the back surface of the idler pulley bracket. Is provided, the outer edge of the support seat of the mounting seat follows the guide groove in a state of being close to the guide groove, and the end of the outer edge is located in the idler pulley. It has a configuration which forms a position shape close to.

[0008]

[Action]

 With the above configuration, even if the belt reaction force acts on the idler pulley bracket, the back surface of the bracket is configured to abut and support the mounting seat having the support seat having the outer edge along the guide groove. Therefore, the point of action of the belt reaction force due to the belt tension acts on the end of the outer edge of this support seat to become the point of deformation of the bracket, but the center of the idler pulley shaft pin and the point of deformation are close to each other. It is possible to prevent the deformation of the bracket.

[0009]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a front view of an engine, and FIGS. 2 and 3 show attachment of an idler pulley bracket 40. A crank pulley 3 is attached to the crankshaft 2, and, for example, a first auxiliary machine 5 and a second auxiliary machine 6 are arranged around the crank pulley 3 via an auxiliary machine bracket 31. An endless belt 9 is hung between the pulleys 7 and 8 attached to the machines 5 and 6 and the crank pulley 3 so that they can be interlockingly driven, and between the crank pulley 3 and the first auxiliary machine 5. In order to increase the elongation and transmission efficiency of the belt 9, an idler pulley 10 for tension adjustment is arranged via an idler pulley bracket 40 (hereinafter referred to as a pulley bracket).

The first auxiliary machine 5 includes a horizontal support portion for an upper bracket 30 mounted above a side portion of the engine block 1a and an auxiliary machine bracket 31 mounted at a predetermined position below the engine block 1a. 32, and the second auxiliary machine 6 is attached to the vertical support portion 33 of the auxiliary equipment bracket 31. The horizontal support portion 32 and the vertical support portion 33 of the auxiliary equipment bracket 31 are substantially L-shaped. A pulley bracket 40 is attached to the mounting corner portion 34 having a shape.

As shown in the drawing, the pulley bracket 40 has a substantially triangular planar shape, and a guide groove 42 is formed in a predetermined range on the bottom edge 41 side of the pulley bracket 40 in the drawing. On the lower surface side of 42, the adjusting screw member 16 is rotatable along the center line C of the groove 42 via the support portions 43a and 43b formed on both sides of the guide groove 42, or only via the support portion 43a. A screw piece member 18, which is supported and in which a shaft pin 19 having a diameter slidable in the guide groove 42 is planted on the upper surface side, is screwed to the adjusting screw member 16 via a screw portion, and is coaxial. An idler pulley 10 is rotatably attached to the pin 19. As described above, the mounting holes 45, 45 are formed at predetermined intervals on the line C1 which is almost parallel to the center line C of the guide groove 42 on the triangular vertex 44 side of the pulley bracket 40 to which the adjusting screw member 16 is attached. And is attached to the mounting seat 35 formed on the accessory bracket 31 through the mounting holes 45, 45.

The mounting seat 35 formed on the mounting corner portion 34 of the accessory bracket 31 is formed to have a predetermined height and abuts against and supports the back surface of the pulley bracket 40. A substantially elliptical mounting screw seat 36 and a substantially fan-shaped supporting seat 37 are formed on the same surface, and a screw hole 36a is screwed into this mounting screw seat 36 in alignment with the mounting hole 45 of the pulley bracket 40. Has been done. When the pulley bracket 40 is aligned with the mounting hole 45 of the mounting seat 35 and the mounting bolt 46 and mounted on the mounting seat 35 formed in this manner, the outer edge 37a of the substantially fan-shaped support seat 37 of the mounting seat 35 becomes It is located along the guide groove 42 in such a state that the screw piece member 18 is close to the guide groove 42 and has an interval through which the screw piece member 18 can pass.

In the pulley bracket 40 provided in this manner, the adjusting screw member 16 is screwed in the attached state to move the idler pulley 10 via the screw piece member 18 to engage with the belt 9, and The belt 9 is screwed and pressed with a predetermined pressing force P to adjust the tension of the belt 9. Then, the engine 1 is driven to rotate the crankshaft 2, whereby the pulleys of the auxiliary machines 5 and 6 engaged and linked by the belt 9 are rotated, so that the auxiliary machines 5 and 6 are rotated. It will fulfill its function.

When the auxiliary machines 5 and 6 are connected to each other, the reaction force F of the belt 9 is applied by the pressing force P of the idler pulley 10 against the belt 9, and the pulley bracket 40 is attached to the pulley bracket 40 via the guide groove 42. As shown by the broken line in FIG. 4, the pulley bracket 40 acts to bend and deform, and the pulley bracket 40 includes a mounting screw seat 36 and a support seat 37 formed at the corner of the accessory bracket 31. The mounting seat 35 is placed on and fixed to the mounting seat 35, and in particular, the substantially fan-shaped outer side edge 37a of the support seat 37 of the mounting seat 35 is close to the guide groove 42 so that the screw piece member 18 can pass therethrough. Since it is provided along the guide groove 42 in the state of having it, the deformation action point Q with respect to the pulley bracket 40 is outside from the center a of the shaft pin 19 on which the belt reaction force F acts. Since the position is relatively close to the end of 37a, even if the reaction force F is repeatedly applied, the center a of the shaft pin 19 and the deformation action point Q are close to each other. The bracket 40 can be prevented from being deformed, and its function can be maintained to ensure the auxiliary function of each of the auxiliary machines 5 and 6.

Although the mounting seat 35 of the idler pulley bracket 40 is provided in the mounting corner portion 34 of the accessory bracket 31 in the above embodiment, the mounting seat 35 is not limited to this. It may be provided.

[0016]

[Effect of device]

 Since the present invention has the above-mentioned configuration, the point of deformation acting on the pulley bracket from the center of the shaft pin on which the belt reaction force acts is relatively close to the end of the outer edge. Even if is repeatedly operated, the center of the shaft pin and the point of deformation are close to each other, so that the pulley bracket can be prevented from being deformed, and its function is maintained to secure the accessory function of each accessory. be able to.

[Brief description of drawings]

FIG. 1 is a front view of an engine.

FIG. 2 is an explanatory diagram of an idler pulley bracket and a mounting seat.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a view on arrow C in FIG.

FIG. 5 is a front view of a belt adjusting mechanism of a conventional engine accessory.

FIG. 6 is a partial plan view of an idler pulley bracket.

FIG. 7 is a side view of the idler pulley bracket.

[Explanation of symbols]

 1 Engine 3 Crank Pulley 5,6 Auxiliary Machine 7,8 Auxiliary Machine Pulley 9 Belt 10 Idler Pulley 35 Mounting Seat 36 Mounting Screw Seat 36a Screw Hole 37 Support Seat 37a Outer Edge 40 Idler Pulley Bracket 42 Guide Groove 45 Mounting Hole

Claims (1)

[Scope of utility model registration request] 1. An idler pulley 10 is engaged and pressed against a belt 9 which is engaged with and driven by a crank pulley 3 of an engine 1 and pulleys 7 and 8 of a plurality of auxiliary machines 5 and 6 attached around the same engine 1. In the structure for adjusting the tension of the belt 9 by using the idler pulley 10, the idler pulley 10 has a guide groove 42 for advancing and retreating toward the belt 9 side. The mounting screw seat 36 having the screw holes 36a aligned with the mounting holes 45, 45 of the idler pulley bracket 40 on the side of the engine 1 and the idler pulley bracket is extended to the guide groove 42 side. A mounting seat 35 including a supporting seat 37 that abuts and supports the back surface of the mounting member 40 is provided.
The outer edge 37a of No. 7 follows the guide groove 42, and the end portion of the outer edge 37a is formed in a position shape close to the center of the idler pulley 10. The idler pulley bracket mounting structure.