JP2013136983A - Angle sensor mounting structure for crankshaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that an angle sensor may be damaged by a flying stone or the like when the angle sensor for a crankshaft is provided to an engine outer wall side.SOLUTION: There are provided a cover member for covering an engine end, a rotator disposed on the outside of the cover member and rotating integrally with a crankshaft, a rotating body which is disposed coaxially with the rotator and on which an auxiliary machine drive belt runs, an angle sensor installed on an outer wall surface of the cover member to detect an angle of the crankshaft through the rotator, and a sensor cover member for covering a front end of the angle sensor and at least a part of the rotating body simultaneously when viewed from the crankshaft direction.

Description

  The present invention relates to an angle sensor mounting structure for detecting the angle of a crankshaft of an engine, and more particularly to an mounting structure when a cover member is provided on the outer surface of the engine and a crankshaft angle sensor is provided on the cover member. .

  In an engine having a plurality of cylinders, fuel is sequentially burned between the cylinders by appropriately controlling the ignition timing in each cylinder. As the ignition timing control, a method of determining the ignition timing based on the angle from the reference position of the crankshaft is used. More specifically, a rotor that rotates integrally with the crankshaft is disposed at the end of the crankshaft, and the angle of the rotor is detected by an angle sensor.

  On the other hand, the camshaft that drives the valve for performing intake and exhaust in the cylinder is also driven by the rotation of the crankshaft. When power is transmitted to the camshaft with a chain, it is necessary to supply lubricating oil to the chain. When oil is supplied to a chain that is driven at high speed, the oil scatters, so a cover member that covers the front surface of the engine is required.

  When power is transmitted to the camshaft with a chain, a structure in which the rotor is installed on the crankshaft inside the cover member is conceivable. However, when such a structure is adopted, the oil is agitated by the rotor, and therefore the oil may be misted. The mist of oil in the crank chamber is recirculated to the intake air as blow-by gas and burned, which leads to promotion of oil consumption.

  Further, when the rotor is disposed inside the cover member, it is necessary to project the angle sensor inside the cover member. This requires high sealing performance to be provided to the seal portion of the angle sensor, leading to an increase in cost. Further, when oil adheres to the rotor and the angle sensor, not only the deterioration of these members but also the deterioration of the oil itself becomes a problem.

  Therefore, a structure in which the rotor and the angle sensor are arranged outside the cover member can be considered. However, outside the cover member, there is a possibility that stepping stones, road surface projections, etc. will fly off while traveling and collide with the rotor or angle sensor. Since these parts are sources of information for determining the ignition timing, the breakage of these members may lead to a deviation in the ignition timing or the loss of the ignition timing, resulting in an engine stall.

  With respect to such a problem, in Patent Document 1, the rotation of the crankshaft is transmitted to the camshaft via the chain, and then the crankshaft that penetrates the cover member that covers the chain and projects outside the cover member A rotating body that rotates integrally with the crankshaft is provided at the shaft end, a rotor and a sensor are disposed between the rotating body and the cover member, and a concave portion that accommodates the sensor is provided on the surface of the cover member that faces the rotating body. A formed engine is disclosed.

  In Patent Document 1, a driving pulley is disposed as a rotating body around a shaft end of a crankshaft protruding outside the cover member, and a V-belt for driving an AC generator and a water pump is wound around the shaft. Therefore, the drive pulley has a structure that covers the rotor and the angle sensor housed in the recess, so that these parts may be damaged by the jumping up of the stepping stones and the projections on the ground even outside the cover member. It is not supposed to be.

  In Patent Document 2, a crank angle sensor for detecting the angle of the crankshaft is attached to the outside of the timing gear case or the timing belt cover, the sensor plate is fixed to the inner surface of the crank pulley, and the crank angle sensor and the sensor plate are attached. Techniques for preventing contamination and heating from lubricating oil are disclosed. However, Patent Document 2 makes no mention of damage caused by stepping stones by arranging the crank angle sensor outside the case.

JP-A-2-245424 Japanese Patent Laid-Open No. 9-079065

  With the structure of Patent Document 1, the rotor and the angle sensor for knowing the angle of the crankshaft can be arranged outside the cover member. That is, these parts are not affected by the oil supplied to the chain that drives the camshaft inside the cover member. However, when replacing the angle sensor, the V-belt must be removed and the drive pulley removed. This is extremely poor workability.

  In recent years, the body has been made more compact and the engine room has been designed to be smaller. That is, the space around the engine has become very narrow. Therefore, removal of the drive pulley is envisioned even in situations where the engine must be taken off the mount. Therefore, it is necessary to remove the angle sensor relatively easily.

  The present invention has been conceived in view of the above problems, and a rotor and an angle sensor are arranged outside a cover member. Furthermore, an angle sensor mounting structure provided with a sensor cover member that simultaneously covers at least part of the rotating body and the tip of the sensor when viewed from the crankshaft direction so that the angle sensor is not damaged by flying stones or the like. provide.

More specifically, the crankshaft angle sensor mounting structure of the present invention includes:
A cover member covering the end of the engine;
A rotor disposed outside the cover member and rotating integrally with the crankshaft;
A rotating body arranged coaxially with the rotor and on which an accessory driving belt is hung,
An angle sensor installed on an outer wall surface of the cover member and detecting an angle of the crankshaft through the rotor;
When viewed from the crankshaft direction, a sensor cover member is provided that simultaneously covers the tip of the angle sensor and at least a part of the rotating body.

  In the sensor mounting structure of the present invention, the sensor cover member that simultaneously covers the tip of the angle sensor and a part of the rotating body (the driving pulley of the V-belt) is provided. This can be prevented.

It is a figure which shows the front surface of the engine cover which has a sensor attachment structure concerning this invention. The upper member of the sensor cover is not attached. It is a figure which shows the relationship between an angle sensor and the lower member and upper member of a sensor cover member. It is a figure which shows the front surface of the engine cover of the state which attached the upper member of the sensor cover member. It is a figure explaining the sensor installation part periphery which concerns on this invention. It is a figure explaining the sensor installation part periphery which concerns on this invention. It is a figure explaining the sensor installation part periphery which concerns on this invention. It is a figure which shows the AA cross section of FIG.

  The present invention will be described below with reference to the drawings. The following description exemplifies an embodiment of the present invention, and the following embodiment may be modified without departing from the gist of the present invention.

  FIG. 1 shows a front view of an engine having an engine cover having a crankshaft angle sensor mounting structure 1 according to the present invention. In the present specification, the “front surface of the engine” refers to a side on which the rotating body 16 that drives the V-belt 18 is disposed when the engine is viewed from the direction of the crankshaft 12. FIG. 1A shows a state in which only a lower member 62 of a sensor cover member 60 described later is attached. An enlarged view of the periphery of the angle sensor 22 without the sensor cover member 60 is shown in FIG. The engine having the angle sensor mounting structure 1 of the present invention includes an oil pan 50, a cylinder block 52 connected to the oil pan 50, a cylinder head 54 connected to the cylinder block 52, and a head cover that covers the top surface of the cylinder head 54. 56.

  The cover member 10 is a member that covers at least the cylinder block 52. A chain that transmits rotational power from the crankshaft 12 to the camshaft drive gear disposed on the front surface of the cylinder block 52 is disposed inside the cover member 10 (not visible in the figure). Therefore, the cover member 10 is also a chain cover.

  The cover member 10 is provided with a through hole 14 (see FIG. 7) through which the crankshaft 12 passes, and the shaft end of the crankshaft 12 is exposed. In the cover member 10, the side where the camshaft drive gear exists is called “inside the cover member 10”, and the opposite side is called “outside the cover member 10”. The outer surface of the cover member 10 is an “outer wall surface”. It can be said that the shaft end of the crankshaft 12 protrudes outside the cover member 10.

  A rotor 21 for detecting the angle of the crankshaft 12 is attached to the crankshaft 12 protruding outside the cover member 10. Further, a rotating body 16 is inserted outside thereof. The rotating body 16 is a drive pulley, and a V-belt 18 that drives an AC generator (not shown) and a drive pulley 17 of a water pump is hung thereon. A device driven by the V belt 18 is called an auxiliary machine. Therefore, the V-belt 18 may be referred to as an accessory drive belt.

  The rotor 21 has a metal gear shape and has a slightly larger diameter than the rotor 16. This is because the V belt 18 is hung on the rotating body 16 but the V belt 18 does not contact the angle sensor 22.

  A sensor installation portion 20 for fixing the angle sensor 22 to the outer wall surface of the cover member 10 is provided obliquely above the rotating body 16. Since the angle sensor 22 uses a magnetic force that changes depending on the distance between the peaks and valleys formed in the rotor 21, the distance between the rotor 21 and the angle sensor 22 needs to be determined accurately. Therefore, the outer wall surface of the cover member 10 is suitable for the installation position of the sensor installation unit 20. Moreover, if it is on the outer wall surface of the cover member 10, the upper half side of the rotary body 16 which is a position far from the ground with little influence of flying stones or the like is more preferable.

  The sensor installation portion 20 is formed by providing a holding through hole 25 (see FIG. 7) for holding the angle sensor 22 in a protruding shape that protrudes outward from the outer wall surface of the cover member 10. This is called a sensor protrusion shape 24. After being inserted into the holding through hole 25, the angle sensor 22 is fastened and fixed by a fastening bolt 19 screwed from a fastening bolt hole 23 (see FIG. 7) in the vicinity of the holding through hole 25.

  FIG. 2 shows the relationship between the sensor cover member 60 and the angle sensor 22. FIG. 2A shows an assembled view of the angle sensor 22 and the sensor cover member 60, and FIG. 2B shows the assembled state. The angle sensor 22 includes a sensor surface 22f that is detected by the rotor 21 and an electrical connection end 22p that is connected to a connecting line for supplying power and transmitting a detected signal, and an angle sensor. A fixing bracket 22b in which a fastening hole 22h for holding 22 is formed is included.

  The sensor cover member 60 includes a lower member 62 and an upper member 61. The lower member 62 is a substantially flat member having a rectangular shape in plan view. An electrical connection end 22p of the angle sensor 22 extends along an axis 62a from an appropriate point near the short side 62s on an axis 62a (indicated by a one-dot chain line) parallel to the long side connecting the centers of the short sides 62s. A penetrating terminal through hole 62h and a fastening bolt through hole 62b are formed.

  Further, on both long sides 62l corresponding to the positions of the through holes 62b for fastening bolts, locking claw receivers 62t to which the upper member 61 is fixed are formed. A step is provided inside the locking claw receiver 62t, and a locking claw 61t of the upper member 61 described later is hooked to lock the members.

  In the upper member 61, a protective wall 61v is formed at a predetermined angle from the linear side 61a side of a substantially planar member having a U-shape in plan view. The U-shaped planar member is referred to as a cover surface 61c. Here, the reason why the protective wall 61v is formed with a predetermined angle with respect to the cover surface 61c is that the angle sensor 22 itself is inclined and attached to the cover member 10 of the engine. And an angle for holding the lens substantially parallel to each other.

  The upper member 61 has locking claws 61t formed on two opposite sides 61b substantially perpendicular to the side where the protective wall 61v of the cover surface 61c is formed. The locking claw 61t has a “return 61j” formed at the tip. Accordingly, the return 61j is hooked on the step formed in the locking claw receiver 62t of the lower member 62, and the lower member 62 and the upper member 61 are locked. The cover surface 61 c is U-shaped so as to avoid the head of the fastening bolt 19 that is positioned in the fastening bolt through hole 62 b of the lower member 62.

  FIG. 2B shows a state where the members shown in FIG. The angle sensor 22 is inserted into the holding through hole 25 (see FIG. 7) of the sensor installation unit 20 shown in FIG. 1 from the tip (sensor surface 22f) (in FIG. 2B, the sensor installation unit 20 is omitted). ing.). Next, the angle sensor 22 is fastened to the sensor installation portion 20 with fastening bolts 19. At that time, the electrical connection end 22p of the angle sensor 22 is passed through the terminal through hole 62h of the lower member 62 so that the fastening hole 22h of the fixing bracket 22b and the fastening bolt through hole 62b of the lower member 62 are concentric. In addition, the fastening bolts 19 are fastened together and fastened. FIG. 1A is a front view of the engine.

  FIG. 3 shows a state where the upper member 61 is locked in the state shown in FIG. The upper member 61 and the lower member 62 are locked by the locking claw 61t of the upper member 61 and the locking claw receiver 62t of the lower member 62 as described above.

  FIG. 7 shows an AA cross section of FIG. A V-groove 16m is formed on the outer periphery of the rotating body 16, and a V-belt 18 is suspended. The angle sensor 22 is held with a slight angle with respect to the outer wall surface of the cover member 10. The circumferential end portion 21e of the rotor 21 is given an elevation angle so that the end surface faces the sensor surface 22f of the angle sensor 22. The holding through hole 25 of the sensor projection 24 is formed so that the sensor surface 22f of the angle sensor 22 is at an angle with the position of FIG.

  When the angle sensor 22 is fixed to the sensor projection shape 24, the fastening bolt 19 is fastened together with the lower member 62 in the fastening bolt hole 23 formed in the sensor projection shape 24. The upper member 61 is locked to the lower member 62. The protective wall 61v of the upper member 61 is formed with a predetermined angle with respect to the cover surface 61c. However, since the angle sensor 22 itself is fixed with an angle with respect to the outer wall surface of the cover member 10, the protective wall 61 v is eventually positioned substantially parallel to the outer wall surface of the cover member 10.

  Furthermore, the front end 61y of the protective wall 61v is formed up to a position where it overlaps with a part of the rotating body 16 and the outer wall surface of the cover member 10 when viewed from the vertical direction. That is, the protective wall 61v covers the tip of the angle sensor 22 (sensor surface 22f) and a part of the rotating body 16 at the same time. With such a configuration, the flying stone flying from the vertical direction with respect to the outer wall surface of the cover member 10 reaches the tip (sensor surface 22f) of the angle sensor 22 by the protective wall 61v of the sensor cover member 60. Absent. 7 indicates the wrap width between the tip 61y of the protective wall 61v and the end of the rotating body 16.

  On the other hand, when the sensor cover member 60 has a shape that covers a part of the rotating body 16, the upper member 61 interferes with the V belt 18 when the V belt 18 is replaced. In that case, workability | operativity becomes favorable by removing the upper member 61 and making it the state of Fig.1 (a).

  In addition, the angle sensor 22 must be adjustable at the time of final adjustment after the engine is mounted on the vehicle body at the time of manufacture. At this time, the adjustment can be performed in the state shown in FIG. 1A without the upper member 61, and the upper member 61 can be attached after the adjustment is completed. That is, by dividing the sensor cover member 60 into two parts, the tip of the angle sensor 22 (sensor surface 22f) can be protected from flying stones and the like, and the workability such as replacement and adjustment is excellent.

  Further, the upper member 61 and the lower member 62 are structured as shown in FIG. 2 so that they cannot be easily separated, so that if the angle sensor 22 is not removed together with the sensor cover member 60, the rotating body 16 or the like It can also be difficult to replace. By doing so, the angle sensor 22 is always removed when the rotating body 16 is replaced, so that the angle sensor 22 is not accidentally damaged.

  Therefore, the method for dividing the sensor cover member 60 into two parts is not particularly limited. For example, the lower member 62 and the upper member 61 are connected by a hinge, and when the upper member 61 is obstructive, the upper member 61 is opened so that the tip (sensor surface 22f) of the angle sensor 22 is exposed. It may be. Alternatively, the locking claw receiver 62t or the locking claw 61t may be formed in advance on the sensor projection shape 24 so that only the upper member 61 can be locked later. In other words, the lower member 62 referred to in the present invention is an aspect in which the sensor protrusion shape 24 is integrally formed beforehand.

  Referring to FIG. 1A again, the cover member 10 is provided with an oil filter 40. Since it is necessary to replace the oil filter 40 according to the travel distance, it is preferable to install the oil filter 40 in a place where it can be easily replaced. The side of the engine that is formed at a substantially right angle to the cover member 10 is densely packed with intake and exhaust system parts such as an intake manifold (not shown) and an exhaust manifold (not shown). Because there is.

  The oil filter 40 is disposed before oil is supplied to each part of the engine from an oil pump (not shown), and removes fine foreign matters in the oil. Therefore, when the oil filter 40 is replaced, the oil may leak from the oil filter mounting seat (not shown) or the oil may be scattered around. Therefore, the oil filter 40 is preferably disposed as low as possible (on the oil pan 50 side).

  Further, the oil filter 40 and the angle sensor 22 are arranged outside the plane surrounded by the V belt 18. The plane surrounded by the V-belt 18 is a plane 18 i surrounded by the V-belt 18 that is a closed ring, and means the outer wall surface of the cover member 10. If the angle sensor 22 and the oil filter 40 are disposed inside the V-belt 18, the V-belt 18 becomes an obstacle when replacing these components. Further, when the oil filter 40 is disposed inside the V belt 18, oil is easily scattered on the V belt 18 when the oil filter 40 is replaced.

  Further, if the oil filter 40 can be disposed sufficiently separated from the rotating body 16, there is no need to worry about oil scattering to the V belt 18. However, such conditions hinder downsizing of the engine. Therefore, the oil filter 40 is located at a position where the rotating body 16 does not interfere even when the component tolerance and the mounting tolerance are worst, and at a position where the sealing performance of the oil passage formed inside the cover member 10 is established. Be placed.

  The oil filter 40 is disposed closer to the oil pan 50 than the angle sensor 22. This is because it is necessary to dispose the protruding wall shape 42 for preventing falling stones, which will also be used as an oil receiver, which will be described later, below the angle sensor 22. In other words, it can be said that the angle sensor 22 is disposed closer to the cylinder head 54 than the oil filter 40.

  On the other hand, the oil pump that sends oil to the oil filter 40 sucks oil from the oil pan 50, and is therefore disposed inside the cover member 10 close to the oil pan 50. Therefore, the oil filter 40 is also disposed on the cover member 10 close to the oil pan 50. That is, it can be said that the oil filter 40 is attached to the outer wall surface in the vicinity of the joint portion between the cover member 10 and the oil pan 50.

  A protruding wall shape 42 that protrudes outward from the outer wall of the cover member 10 is formed from below the oil filter 40 toward the angle sensor 22. That is, the protruding wall shape 42 is formed between the oil filter 40 and the rotor 21. The protruding wall shape 42 is preferably formed at the same time as the cover member 10 is formed.

  This is because when the cover member 10 is formed at the same time, the protruding wall shape 42 can be formed with an increase of only a few grams of raw materials. Further, when formed at the same time, the protruding wall shape 42 becomes a part of the cover member 10 and contributes to improvement of the rigidity of the cover member 10.

  FIG. 4 shows a partially enlarged view of FIG. The upper member 61 of the sensor cover member 60 is shown in a removed state. The protruding wall shape 42 is formed between the oil filter 40 and the rotor 21 from the lower end 40 d of the oil filter 40. Here, the lower end 40 d of the oil filter 40 is a point on the cover member 10 that does not contact the oil filter 40 under the gravity when viewed from the center 40 c of the oil filter 40.

  If the engine is tilted when it is attached to the vehicle body, it may be under gravity in consideration of the tilt. This is because the protruding wall shape 42 is provided in order to prevent oil leakage from the oil filter 40 from scattering to the rotor 21 side. Further, if the protruding wall shape 42 comes into contact with the oil filter 40, the oil filter 40 cannot be attached.

  Moreover, if it is too close to the junction part (flange 10f) of the cover member 10 and the oil pan 50, workability | operativity, such as bolt fastening, will fall. Therefore, the lower end 40d is a point on the cover member 10 below the gravity 40 from the center 40c of the oil filter 40, and a portion where the workability of attachment of the oil filter 40 and joining of the cover member 10 and the oil pan 50 is not deteriorated appropriately. You can decide.

  The protruding wall shape 42 is formed on the side close to the rotor 21 from the lower end 40d of the oil filter 40 to the upper and lower boundary lines 40h of the oil filter 40 along the shape of the oil filter 40. The upper and lower boundary line 40h of the oil filter 40 is a direction (indicated by a two-dot chain line) perpendicular to the above-described direction of gravity at the center 40c of the oil filter 40. This is formed along the direction in which the rotating body 16 rotates. This is to prevent stepping stones from hitting the angle sensor 22.

  More preferably, the protruding wall shape 42 may have an extending portion 42e extending in the direction of the angle sensor 22 beyond the upper and lower boundary line 40h. This is because the protruding wall shape 42 also has a role of preventing the stepping stones from colliding with the angle sensor 22 and is therefore preferably extended as close to the angle sensor 22 as possible. The extending portion 42e may be extended as appropriate to the sensor protrusion shape 24, or may be extended until it contacts the sensor protrusion shape 24.

  The protruding wall shape 42 is formed with a distance that does not contact the rotor 21. The height of the protruding wall shape 42 is preferably formed from the outer wall surface of the cover member 10 to the height surface of the V-belt 18 (see reference numeral 18t in FIG. 7) or higher. This is because the protruding wall shape 42 is provided in order to prevent oil from scattering to the V-belt 18.

  An inclined shape 44 that slopes downward from the lower end 40d of the protruding wall shape 40 in the direction opposite to the rotor 21 in the direction of gravity may be formed continuously with the protruding wall shape 42. This is because when oil leaks from the mounting portion of the oil filter 40, the oil flows through the inclined shape 44 and can be guided to a desired place.

  If oil adheres to the connecting portion 51 between the cover member 10 and the oil pan 50, it may be mistaken for oil bleeding from the oil pan 50. Oil bleeding from the oil pan 50 is suspected of oil leakage from the oil pan 50 and requires extensive repair. Therefore, the oil leakage from the oil filter 40 needs to be guided to a location where the oil filter 40 does not adhere to the connecting portion 51 between the cover member 10 and the oil pan 50.

  Specifically, as an example in which oil is not attached to the coupling portion 51, FIG. 4 shows a structure in which an oil dropping member 46 connected to the flange 10 f of the cover member 10 is disposed below the inclined shape 44. The oil dropping member 46 has an inclined surface 46s and a semicircular cutout 46c on the lower side. The oil that has fallen on the inclined surface 46s from the tip of the inclined shape 44 flows along the inclined surface 46s and falls downward at the end point of the inclined surface 46s. The semicircular cutout portion 46 c is a cutout for preventing oil from flowing into the coupling portion 51 along the lower side of the oil dropping member 46.

Referring to FIG. 5, a rib shape 26 for protecting the angle sensor 22 from flying stones or the like is extended in the sensor projection shape 24. The upper member 61 of the sensor cover member 60 is shown in a removed state. The rib shape 26 is formed in the circumferential direction of a circle whose radius is the distance r ₀ from the center of the crankshaft 12 to the sensor projection shape 24. In FIG. 5, the circumferential direction is indicated by an arrow 27. The distance r ₁ from the center of the crankshaft 12 is shorter than the distance r ₀ to the sensor projection shape 24 at the tip 26t in the extending direction of the rib shape 26. That is, the rib shape 26 extends in the circumferential direction 27 so as to be close to the rotor 21 from the sensor projection shape 24.

  The height of the rib shape 26 is equal to or lower than that of the sensor projection shape 24. This is because if the height is higher than the sensor protrusion shape 24, the strength of the rib shape 26 is reduced, and the rib shape 26 itself may be damaged when hit with a stepping stone or the like. The tip 26t of the rib shape 26 is not in contact with the rotating body 16, the V belt 18 or the rotor 21, and the predicted flying stone does not collide with the angle sensor 22 (especially the sensor surface 22f shown in FIG. 7). What is necessary is just to form so that the clearance gap 28 can be provided between the rotary bodies 16. FIG.

  The rib shape 26 arranged in this way is arranged as an obstacle that narrows the gap 28 between the sensor projection shape 24 and the rotating body 16. That is, stepping stones are blocked by the rotating body 16 and the rib shape 26 and do not reach the tip of the angle sensor 22. In FIG. 5, the rib shape 26 is formed in one direction, but the rib shape 26a may be formed in the opposite direction. The rib shape 26a is indicated by a two-dot chain line.

  Referring to FIG. 6, a protrusion shape other than the sensor protrusion shape 24 may be formed in the vicinity of the sensor installation portion 20. The upper member 61 of the sensor cover member 60 is shown in a removed state. Such a protrusion shape is referred to as a proximity protrusion shape 30. The proximity protrusion shape 30 has an effect of strengthening the sensor protrusion shape 24. The angle sensor 22 detects the angle of the crankshaft 12 by detecting the strength of magnetic coupling due to the uneven shape provided at the periphery of the rotor 21.

  Therefore, the distance between the tip of the angle sensor 22 and the rotor peripheral end portion 21e of the rotor 21 needs to be as close as possible, and the distance must be stably maintained. Therefore, the positional accuracy of the sensor projection shape 24 needs to be strong against disturbances such as vibration and heat shock. Forming the proximity protrusion shape 30 in the vicinity of the sensor protrusion shape 24 leads to an improvement in strength of the sensor protrusion shape 24.

A rib shape 32 can also be formed in the proximity projecting shape 30. FIG. 6 shows a rib shape 32 extending from the proximity projecting shape 30 in the same direction as the rib shape 26 provided in the sensor projection shape 24. The ribs 32 are also extended toward the circumference of the circumferential direction (arrow 33) to the distance r ₃ to the proximity projecting shape 30 and the radius from the center of the crankshaft 12.

Further, the distance r ₃ from the center of the crankshaft 12 to the tip 32 t of the rib shape 32 is formed shorter than the distance r ₂ from the center of the crankshaft to the proximate protruding shape 30. That is, the rib shape 32 extended from the proximity protrusion shape 30 is also extended in the circumferential direction 33 so as to be close to the rotating body 16 from the proximity protrusion shape 30.

  The height of the rib shape 32 of the proximity projection shape 30 is the same as the height of the rib shape 26 of the sensor projection shape 24, and is preferably equal to or lower than the height of the proximity projection shape 30. Also, the extended length of the rib shape 32 is such that the tip 32t of the rib shape 32 is not in contact with the rotating body 16, the V belt 18 or the rotor 21, and the predicted flying stone is the angle sensor 22 (particularly in FIG. 7). What is necessary is just to form so that the clearance gaps 28 and 29 which do not collide with the shown sensor surface 22f) can be provided between the rotary bodies 16. FIG.

  As described above, in the angle sensor mounting structure 1 of the present invention, since the sensor cover member 60 that covers the tip of the angle sensor 22 (sensor surface 22f) and a part of the rotating body 16 at the same time is disposed, the tip of the angle sensor 22 (sensor The surface 22f) is not damaged by stepping stones or the like. Further, in the angle sensor mounting structure 1 of the present invention, the projecting wall shape 42 extending from the oil filter 40 and the proximity projecting shape 30 disposed in the vicinity of the sensor projecting shape 24 make the stepping stones from the left and right or the lower side. Can also defend.

  That is, the angle sensor 22 can be safely attached to the outer wall side of the cover member 10. Therefore, the distance between the angle sensor 22 and the rotor 21 can be visually confirmed, and the distance between the rotor 21 and the angle sensor 22 can be arranged close to each other. Further, the angle sensor 22 can be easily replaced.

  Further, the sensor cover member 60 includes an upper member 61 and a lower member 62, and the upper member 61 can be attached after the angle sensor 22 and the lower member 62 are attached to the engine. Therefore, the angle sensor 22 is adjusted. In this case, the angle sensor 22 can be exposed. Further, since the upper member 61 is divided from the lower member 62 in this manner, when the V belt 18 is replaced, it can be replaced simply by removing the upper member 61.

  The angle sensor mounting structure of the present invention can be suitably used for an engine of a type in which a camshaft is driven by a chain, and is formed by exposing an angle sensor for detecting a crankshaft angle to the outer wall of the engine. Can be suitably used.

DESCRIPTION OF SYMBOLS 1 Angle sensor mounting structure (of crankshaft) 10 Cover member 10f Flange of cover member 12 Crankshaft 14 Through hole (of cover member from which crankshaft protrudes) 16 Rotating body 16m V groove 17 Water pump 18 V belt 18i V belt Surrounding plane 18t V-belt height surface 19 Fastening bolt 20 Sensor installation part 21 Rotor 21e Rotor peripheral end portion 22 Angle sensor 22b (Angle sensor) Fixing bracket 22f (Angle sensor) Sensor surface 22h (Angle sensor) Fastening hole 22p Electrical connection end of angle sensor 23 Fastening bolt hole 24 Sensor projection shape 25 Holding through hole 26 Rib shape 26a (sensor projection shape) Rib shape 26t rib Tip in the extending direction of the shape 27 Circumferential direction 28, 29 Clearance 30 Protruding in close proximity Shape 32 Rib shape (proximal projecting shape) 32t Rib shape tip of proximate projecting shape 33 Circumferential direction 40 Oil filter 40c Center of oil filter 40d Lower end of oil filter 40h Upper and lower boundary lines of oil filter 42 Projecting wall shape 42e Projecting wall Shape extension portion 44 Inclined shape 46 Oil drop member 46c Semi-circular cutout portion 46s Inclined surface 50 Oil pan 51 Joint portion between cover member and oil pan 52 Cylinder block 54 Cylinder head 56 Head cover 60 Sensor cover member 61 Upper member 61a Linear side (upper member) 61b Side (substantially perpendicular to the linear side) 61c Cover surface 61j (Locking claw) return 61t Locking claw 61v Protection wall 61y (Protection wall) tip 62 Lower member 62a Axis 62b Through hole (for fastening bolt) 62h Terminal through hole 62l Long side (lower member) 62s Short side (lower member) 62t Locking claw support 63 Wrap width

Claims (1)

A cover member covering the end of the engine;
A rotor disposed outside the cover member and rotating integrally with the crankshaft;
A rotating body arranged coaxially with the rotor and on which an accessory driving belt is hung,
An angle sensor installed on an outer wall surface of the cover member and detecting an angle of the crankshaft through the rotor;
An angle sensor mounting structure for a crankshaft, comprising a sensor cover member that simultaneously covers at least a part of the tip of the angle sensor and the rotating body when viewed from the crankshaft direction.