JP5624005B2 - Starter mounting structure - Google Patents

Description

  The present invention relates to a starter mounting structure for mounting a starter for starting an engine to a transmission case.

  In recent years, the starter has been downsized, but it is necessary to adopt a starter having a large physique for an engine having a large displacement. A starter with a large physique has a heavy mass, and it is difficult for an operator to attach the starter to a transmission case in a vehicle factory. For example, when a starter is attached to a mission case, it is necessary to immediately fix the starter with a mounting bolt in order to prevent a heavy starter from dropping, and this reduces the degree of freedom of assembly work. Further, since the worker supports a starter with a large mass while the mounting bolt is tightened, the worker's fatigue is considerable.

  Therefore, as a means for supporting the weight of the starter, for example, as shown in FIG. 7, a method of inserting the knock pin 100 between the housing 210 of the starter 200 and the transmission case 300 (see Patent Document 1), A method such as inserting a stud bolt standing on the housing 210 into the mission case 300 is employed. Reference numeral 400 in the drawing is a mounting bolt for fixing the starter 200 to the mission case 300.

Japanese Utility Model Publication No. 58-131146

However, the above knock pin method requires high dimensional accuracy of the hole into which the knock pin 100 is inserted, and has been expensive. Further, in order to support the weight of the starter, it is necessary to make the insertion length of the knock pin 100 and the stud bolt sufficiently long. For this reason, when the starter is mounted and removed, it is necessary to move the starter 100 backward (to the right in FIG. 7) with respect to the mission case 300 by the insertion length of the knock pin 100 and the stud bolt. In this case, in a vehicle equipped with a lot of auxiliary machines in recent years, there is a problem that when the starter 200 is largely moved backward, it interferes with other auxiliary machines.
The present invention has been made based on the above circumstances, and its purpose is to support the weight of the starter, and to mount and remove the starter without greatly moving it backward when the starter is mounted or removed. The object is to provide a starter mounting structure that can be performed.

(Invention of Claim 1)
In the present invention, a starter housing for starting an engine is provided with a flange portion and an inlay portion, and the inlay portion is fitted into an inlay hole formed in a starter mounting surface of a transmission case, and the starter is attached to the flange portion with a mounting bolt. In the starter mounting structure, which is fastened to the surface, the starter is a cantilever structure in which a pinion is placed at the end of the output shaft and the pinion is pushed together with the output shaft and meshes with the engine ring gear. When the starter mounting direction is defined as the starter mounting direction, a hook that extends in the starter mounting direction and bends in a hook shape is attached to the starter housing. Protrusions protruding in the radial direction are provided at the position on the direction side, and When attaching the starter to the transmission case, engage the hook with the protrusion and temporarily fix the starter until the flange is fixed to the starter mounting surface with the mounting bolt after the spigot is fitted into the spigot hole. It is characterized by doing.

  According to the present invention, after engaging the spigot portion provided in the housing of the starter with the spigot hole formed in the starter mounting surface, the hook attached to the housing is engaged with the protruding portion provided in the transmission case. Thus, the starter can be temporarily fixed. Thereby, after fitting the spigot part into the spigot hole, it is possible to prevent the spigot part from falling out of the spigot hole due to the starter's own weight until the flange part of the starter is tightened and fixed to the starter mounting surface with a mounting bolt. The operator does not need to support a heavy starter, and the worker's fatigue can be reduced.

In addition, when compared to the conventional mounting structure that uses knock pins or stud bolts to support the starter's own weight, there is no need to move the starter backward (in the direction opposite to the starter mounting direction) when installing or removing the starter. Interference with other auxiliary machines can be avoided, and the degree of assembly freedom can be improved.
The hook and the protrusion need only have a dimensional accuracy that does not cause the starter to drop, that is, it is not necessary to process the hook and the protrusion with high accuracy, so the costs associated with providing the hook and the protrusion can be reduced. It is possible to suppress.
Furthermore, by engaging the hook with the protrusion and temporarily fixing the starter, even if the starter is carried along with the engine by the belt conveyor, there is no fear of the starter falling.

(Invention of Claim 2)
According to the present invention, a starter housing for starting the engine is provided with a flange portion and an inlay portion, and a plate is sandwiched between the starter mounting surface and the flange portion of the transmission case, and the starter mounting surface or the inlay hole formed in the plate In the starter mounting structure in which the spigot part is fitted to the flange and the flange part is fastened and fixed to the starter mounting surface with mounting bolts, the starter has a pinion placed at the end of the output shaft, and the pinion is pushed together with the output shaft. When the starter mounting direction is defined as the starter mounting direction, the starter housing extends in the starter mounting direction and the tip is bent like a bowl. A hook is attached and the mission case -Protruding part that protrudes in the radial direction is provided at a position on the celestial side from the center of the hole, and when attaching the starter to the transmission case, after fitting the spigot part into the spigot hole, the flange part is attached to the starter mounting surface. The starter is temporarily fixed by engaging the hook with the projecting portion until it is tightened and fixed.

  According to the present invention, after engaging the spigot portion provided in the housing of the starter with the spigot hole formed in the starter mounting surface or the plate, the hook attached to the housing is engaged with the protruding portion provided in the transmission case. By combining, the starter can be temporarily fixed. Thereby, after fitting the spigot part into the spigot hole, it is possible to prevent the spigot part from falling out of the spigot hole due to the starter's own weight until the flange part of the starter is tightened and fixed to the starter mounting surface with a mounting bolt. The operator does not need to support a heavy starter, and the worker's fatigue can be reduced.

In addition, when compared to the conventional mounting structure that uses knock pins or stud bolts to support the starter's own weight, there is no need to move the starter backward (in the direction opposite to the starter mounting direction) when installing or removing the starter. Interference with other auxiliary machines can be avoided, and the degree of assembly freedom can be improved.
The hook and the protrusion need only have a dimensional accuracy that does not cause the starter to drop, that is, it is not necessary to process the hook and the protrusion with high accuracy, so the costs associated with providing the hook and the protrusion can be reduced. It is possible to suppress.
Furthermore, by engaging the hook with the protrusion and temporarily fixing the starter, even if the starter is carried along with the engine by the belt conveyor, there is no fear of the starter falling.

(Invention of Claim 3)
The starter mounting structure according to claim 1 or 2, wherein the hook is provided outside a plane range in which the flange portion abuts against the starter mounting surface or the plate.
By providing the hook outside the plane area of the flange portion that contacts the starter mounting surface or the plate, it is possible to attach the hook to the housing later after processing the plane area of the flange portion. In addition, since the hook is provided at a position larger in diameter than the spigot portion, even if the backlash caused by the fitting gap between the spigot portion and the spigot hole and the backlash generated between the hook and the protruding portion are the same amount, When the inclination angle of the starter is compared, the inclination angle of the hook is smaller than that of the spigot. Thereby, since the dimensional accuracy of a hook and a protrusion part can be made low, the manufacturing cost of a hook and a protrusion part can be suppressed.

(Invention of Claim 4)
The starter mounting structure according to claim 1 or 2, wherein the hook is provided radially inward from the outer diameter of the spigot portion.
By disposing the hook on the inner side in the radial direction from the outer diameter of the spigot portion, the outer shape of the starter and the transmission case will not be increased, and a mounting space for other auxiliary machines can be easily secured.

(Invention of Claim 5)
In the starter mounting structure according to any one of claims 1 to 4, when the engaging portion is fitted into the inlay hole in the projecting portion, the starter is rotated to engage the hook with the projecting portion. A positioning projection for positioning the hook is provided.
According to said structure, when rotating a starter and engaging a hook with a protrusion part, a hook can be positioned by the convex part for positioning. That is, by rotating the starter to a position where the hook comes into contact with the positioning convex portion, the mounting position of the starter with respect to the transmission case can be determined. In other words, by providing the positioning convex portion according to the mounting position of the starter, the mounting position of the starter can be confirmed by the hook abutting the positioning convex portion. The starter mounting position refers to a position where the flange portion is fixed to the starter mounting surface of the transmission case with mounting bolts.

(Example 1) which is sectional drawing which shows the attachment structure of a starter. (A) It is sectional drawing which shows the state which attached the hook to the housing, (b) It is A view of the hook shown to the same figure (a). (A) Axial front view showing the positional relationship between the hook and the protruding portion when the starter is mounted, (b) Axial front view showing the positional relationship between the hook and the protruding portion when the starter is fastened and fixed with a mounting bolt. It is. It is a perspective view which shows the state which engaged the hook with the protrusion part. It is sectional drawing which shows the state which temporarily fixed the starter to the mission case. (Example 2) which is sectional drawing which shows the attachment structure of a starter. It is sectional drawing which shows the attachment structure of the starter concerning a prior art.

  The mode for carrying out the present invention will be described in detail with reference to the following examples.

Example 1
As shown in FIG. 1, the starter 1 of the present embodiment includes a motor 2 that generates a rotational force, an output shaft 3 that rotates when the output torque of the motor 2 is transmitted, and a shaft directly on the output shaft 3. The spline-fitted pinion 4 and a shift lever (not shown) are driven by the attractive force of the electromagnet to push the pinion 4 in the counter-motor direction (left direction in FIG. 1) integrally with the output shaft 3, and the motor 2 An electromagnetic switch 5 that interrupts the energization current, a motor 2 and a housing 6 that fixes the electromagnetic switch 5, and the like, are engaged with an engine ring gear (not shown), and the pinion 4 is engaged with the output torque of the motor 2. This is a well-known function for starting the engine by transmitting to the ring gear. In the starter 1 of this embodiment, as shown in FIG. 1, a pinion 4 is arranged at the front end of the output shaft 3, and a part of the pinion 4 protrudes in the axial direction from the tip of the housing 6. That is, it is a cantilever structure in which a bearing (not shown) that supports the output shaft 3 is not arranged on the front side (left side in the drawing) from the pinion 4.

The housing 6 of the starter 1 is provided with a flange portion 6a pressed against the starter mounting surface 7a of the transmission case 7 via the plate 8, and an inlay portion 6b fitted into a circular inlay hole 8a formed in the plate 8. The mounting bolt 9 is inserted into the bolt insertion hole 6c formed in the flange portion 6a, and the mounting bolt 9 is screwed into the screw hole 7b formed in the transmission case 7 and fastened to be fixed to the transmission case 7. . For the plate 8, for example, a cold-rolled steel plate having a thickness of about several mm is used.
Further, a hook 10 is attached to the housing 6 so as to extend in the starter mounting direction (left direction in FIG. 1) and the tip portion bends like a bowl.

As shown in FIG. 2A, the hook 10 is bent into an L-shaped cross section, and is fixed to the housing 6 by a fixing bolt 12 through an iron pipe spacer 11. As shown in FIG. 1, the hook 10 has a flange on the celestial side (upper side in the drawing) from the center of gravity of the starter 1 indicated by point G in the state where the starter 1 is fixed to the transmission case 7 with mounting bolts 9. The portion 6 a is provided outside the plane range in contact with the plate 8.
The iron pipe spacer 11 is formed, for example, by cutting an iron pipe into a predetermined length.
The fixing bolt 12 is inserted into the iron pipe spacer 11 with the mounting surface of the hook 10 sandwiched between the bolt head 12 a and the end face of the iron pipe spacer 11, and the male screw portion 12 b formed at the tip is attached to the housing 6. It is fixed by screwing into the formed screw hole 6d.

One end of the hook 10 bent in an L shape is disposed along the longitudinal direction of the iron pipe spacer 11, and the hook 10 is rotated by abutting against a part of the housing 6 when the fixing bolt 12 is tightened. It has a role to prevent. The other end side of the hook 10 is provided orthogonal to the longitudinal direction of the iron pipe iron pipe spacer 11, and the hook 10 is fixed to the housing 6 with the fixing bolt 12 via the iron pipe spacer 11, and one end side of the hook 10. On the other hand, it extends toward the pinion 4 side in the radial direction.
Further, as shown in FIG. 2B, reinforcement formed by bending both end portions in the width direction on both sides in the width direction perpendicular to the length direction from the one end surface to the other end surface of the hook 10. Ribs 10a are provided.

As shown in FIG. 1, the starter mounting surface 7 a of the mission case 7 is formed with a cavity portion 13 that opens concentrically with the inlay hole 8 a formed in the plate 8, and the pinion 4 of the starter 1 is formed in the cavity portion 13. And the ring gear on the engine side are engaged. The inner diameter of the cavity 13 that opens to the starter mounting surface 7 a is slightly larger than the inner diameter of the spigot hole 8 a formed in the plate 8.
Further, the mission case 7 is provided with a projecting portion 14 at a position on the celestial side (upper side in the drawing) from the center of the hollow portion 13 (that is, the center of the spigot hole 8a). The projecting portion 14 has a function of temporarily fixing the starter 1 in cooperation with the hook 10 attached to the housing 6. As shown in FIG. 3, the projecting portion 14 is substantially triangular outward from the outer peripheral edge of the mission case 7. Protruding into the shape. A positioning convex portion 14a for positioning the hook 10 is integrally provided at a tip portion protruding in the radial direction of the protruding portion 14.

Next, a method for attaching the starter 1 will be described.
First, the spigot portion 6 b provided in the housing 6 is fitted into the spigot hole 8 a formed in the plate 8. At this time, as shown in FIG. 3A, the starter 1 is located at a position where the hook 10 fixed to the housing 6 does not interfere with the protrusion 14 provided on the transmission case 7, in other words, the starter 1 is moved forward in the axial direction. Needless to say, the spigot portion 6b is fitted into the spigot hole 8a at a position where the protrusion 14 and the hook 10 do not overlap when viewed from the pinion side.

  Thereafter, as shown in FIG. 3B, the starter 1 is rotated in the direction indicated by the arrow until the hook 10 can be engaged with the protrusion 14. Specifically, as shown in FIG. 4, the starter 1 is rotated to a position where the side surface (rib 10 a) of the hook 10 comes into contact with the positioning convex portion 14 a provided on the protruding portion 14. As a result, the starter 1 can be adjusted to the attachment position where the starter 1 can be attached to the transmission case 7 by the attachment bolt 9. That is, the position of the bolt insertion hole 6 c formed in the flange portion 6 a of the starter 1 can be matched with the position of the screw hole 7 b formed in the transmission case 7.

  The positioning convex portion 14 a provided on the protruding portion 14 not only positions the hook 10 but also functions as a means for preventing the hook 10 from coming off. That is, when the protrusion 14 a is not provided with the positioning protrusion 14 a, when the starter 1 is rotated and the hook 10 is engaged with the protrusion 14, the hook 10 protrudes past the tip of the protrusion 14. The hook 10 can be positioned at a predetermined position by providing the positioning projection 14 a at the tip of the projecting portion 14, but the hook 10 passes through the projecting portion 14 from the projecting portion 14. It can also be prevented from coming off.

  After the starter 1 is rotated to a predetermined position (position where the bolt insertion hole 6c matches the screw hole 7b), the support of the starter 1 is removed (the operator releases his / her hand from the starter 1), as shown in FIG. Similarly, the hook 10 is engaged with the projecting portion 14 by tilting the entire starter in a direction (direction shown by an arrow in the drawing) in which the top side of the inlay portion 6b is removed from the inlay hole 8a by the weight of the starter 1. In other words, even if the entire starter is inclined due to its own weight, it is possible to prevent the hook portion 6b from falling out of the spigot hole 8a by engaging the hook 10 with the protruding portion 14.

  Thereafter, the mounting bolt 9 is inserted into the bolt insertion hole 6c formed in the flange portion 6a, and the mounting bolt 9 is screwed into the screw hole 7b formed in the transmission case 7 and tightened. Thereby, as shown in FIG. 1, the starter 1 is fixed to the starter mounting surface 7 a of the mission case 7 via the plate 8. When the starter 1 is fixed to the transmission case 7 by the mounting bolt 9, the starter 1 is not inclined, so that the engagement state between the hook 10 and the protruding portion 14 is released.

(Operation and Effect of Example 1)
In the starter 1 described in the first embodiment, the hook 10 attached to the housing 6 is engaged with the protrusion 14 provided on the transmission case 7 until the starter 1 is fixed to the transmission case 7 with the attachment bolt 9. Temporarily fixed temporarily. Thus, after fitting the spigot part 6b into the spigot hole 8a, the spigot part 6b will not fall out of the spigot hole 8a even if the starter 1 is inclined by its own weight. It is not necessary for the operator to support the heavy starter 1, and the fatigue of the operator can be greatly reduced.

In addition, when compared to the conventional mounting structure that supports the dead weight of the starter 1 using knock pins or stud bolts, the starter 1 is greatly moved in the opposite mounting direction (right direction in FIG. 1) when the starter 1 is mounted and removed. Therefore, it is possible to avoid interference with other auxiliary machines and improve the degree of freedom of assembly.
The hook 10 and the protrusion 14 need only have a dimensional accuracy that does not cause the starter 1 to fall, that is, the hook 10 and the protrusion 14 need not be processed with high accuracy. Costs associated with the provision can be kept low. Furthermore, by engaging the hook 10 with the protrusion 14 and temporarily fixing the starter 1, there is no fear that the starter 1 will fall even if the starter 1 is carried along with the engine by the belt conveyor.

In the first embodiment, since the hook 10 is provided outside the plane range of the flange portion 6a that contacts the plate 8, the hook 10 can be assembled to the housing 6 after the plane range of the flange portion 6a is processed. It becomes.
Further, since the hook 10 is provided on the outer side in the radial direction from the outer diameter of the spigot portion 6b, it is generated between the hook 10 and the protruding portion 14 due to the backlash caused by the fitting gap between the spigot portion 6b and the spigot hole 8a. Even if the amount of play is the same, if the inclination angle of the starter 1 due to play is compared, the inclination angle of the hook 10 is smaller than that of the spigot portion 6b. Thereby, since the dimensional accuracy of the hook 10 and the protrusion part 14 can be made low, the manufacturing cost of the hook 10 and the protrusion part 14 can be suppressed.

(Example 2)
In the second embodiment, the hook 10 is attached at a position different from that of the first embodiment. As shown in FIG. 6, the hook 10 is provided on the inner side in the radial direction from the outer diameter of the inlay portion 6b, and the hook 10 is engaged. This is an example in which the projecting portion 14 of the transmission case 7 is provided on the inner side in the radial direction from the inner diameter of the spigot hole 8a.
According to the above configuration, the hook 10 and the protrusion 14 do not appear outside the outer shape of the starter 1 and the transmission case 7 in a state where the starter 1 is fixed to the transmission case 7 with the mounting bolt 9. Can be secured easily.
It is to be noted that temporarily fixing the starter 1 temporarily until the starter 1 is fixed to the transmission case 7 by the mounting bolt 9 by engaging the hook 10 with the protruding portion 14 of the transmission case 7 according to the first embodiment. Is the same.

(Modification)
In the first embodiment, an example in which the plate 8 is sandwiched between the starter mounting surface 7a of the mission case 7 and the flange portion 6a of the starter 1 and the spigot hole 8a is formed in the plate 8 is described. 7 starter mounting surface 7a. In this case, the plate 8 is formed with a round hole having a slightly larger inner diameter than the spigot hole of the mission case 7.
Moreover, the plate 8 described in Example 1 can also be abolished. In other words, an inlay hole is formed in the starter mounting surface 7a of the mission case 7, and the inlay portion 6b of the housing 6 is fitted into the inlay hole, and the flange portion 6a is brought into direct contact with the starter mounting surface 7a, so that the mounting bolt 9 The structure may be fixed by tightening.

DESCRIPTION OF SYMBOLS 1 Starter 6 Housing 6a Flange part 6b Inlay part 7 Mission case 7a Starter mounting surface 8 Plate 8a Inlay hole 9 Mounting bolt 10 Hook 14 Protruding part 14a Positioning convex part

Claims (5)

A starter housing for starting the engine is provided with a flange portion and an inlay portion, and the inlay portion is fitted into an inlay hole formed in the starter attachment surface of the transmission case, and the flange portion is attached to the starter attachment surface by a mounting bolt. In the mounting structure of the starter tightened and fixed to
The starter has a cantilever structure in which a pinion is disposed at an end of an output shaft, and the pinion is pushed together with the output shaft and meshes with a ring gear of an engine.
When defining the direction in which the starter is attached to the transmission case as the starter attachment direction, the starter housing is attached with a hook that extends in the starter attachment direction and has a tip bent in a hook shape.
The transmission case is provided with a protruding portion that protrudes in the radial direction at a position on the celestial side from the center of the spigot hole,
When the starter is attached to the transmission case, the hook is inserted into the projecting portion until the flange portion is fitted and fixed to the starter mounting surface with the mounting bolt after the spigot portion is fitted into the spigot hole. The starter mounting structure is characterized in that the starter is temporarily fixed by being engaged with each other. The starter housing for starting the engine is provided with a flange portion and an inlay portion, a plate is sandwiched between the starter mounting surface of the transmission case and the flange portion, and the starter mounting surface or an inlay hole formed in the plate In the starter mounting structure in which the spigot portion is fitted and the flange portion is fastened and fixed to the starter mounting surface by a mounting bolt,
The starter has a cantilever structure in which a pinion is disposed at an end of an output shaft, and the pinion is pushed together with the output shaft and meshes with a ring gear of an engine.
When defining the direction in which the starter is attached to the transmission case as the starter attachment direction, the starter housing is attached with a hook that extends in the starter attachment direction and has a tip bent in a hook shape.
The transmission case is provided with a protruding portion that protrudes in the radial direction at a position on the celestial side from the center of the spigot hole,
When the starter is attached to the transmission case, the hook is inserted into the projecting portion until the flange portion is fitted and fixed to the starter mounting surface with the mounting bolt after the spigot portion is fitted into the spigot hole. The starter mounting structure is characterized in that the starter is temporarily fixed by being engaged with each other. The starter mounting structure according to claim 1 or 2,
2. The starter mounting structure according to claim 1, wherein the hook is provided outside a plane range in which the flange portion contacts the starter mounting surface or the plate. The starter mounting structure according to claim 1 or 2,
The starter mounting structure, wherein the hook is provided on an inner side in a radial direction than an outer diameter of the spigot portion. In any one starter attachment structure described in Claims 1-4,
The projecting portion is provided with a positioning projection for positioning the hook when the starter is rotated and the hook is engaged with the projecting portion after the spigot portion is fitted into the inlay hole. The starter mounting structure characterized by the above.

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