JP2001341538A - Housing cover mounting structure for industrial vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably mount a housing cover to a housing body and to mount and demount the cover with a simple shot-time work. SOLUTION: The cover 2 is fixed using bolts 31 and 31b, to a plane 11b out of a pair of planes 11a and 11b facing an opening 3 of a body 1, and bosses 12a and 12b provided at the body 1 are fitted into holes 22a and 22b provided in the cover 2, at the plane 11a. Since the outer peripheral surfaces of the bosses 12a and 12b are formed in tapered surfaces, the bosses 12a and 12b are brought into close contact with the holes 22a and 22b by adjusting the length of the cover 2 appropriately, and the cover 2 is mounted on the body 1 in a stably state without looseness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing cover mounting structure for an industrial vehicle which can be applied to, for example, a clutch housing cover of a forklift.

[0002]

2. Description of the Related Art In manual vehicles of industrial vehicles such as forklifts, a clutch for interrupting transmission of driving force from an engine to a transmission is usually provided. The clutch has various members including a rotating member such as a clutch disk arranged in a clutch housing.

The general structure of a general clutch housing will be described with reference to FIG. As shown in FIG. 6, an opening 103 is provided in the upper end surface of the clutch housing main body 101 to enable maintenance inside the housing including replacement of a worn clutch disk. On the other hand, the opening 103 is formed by the clutch housing cover 102 except during maintenance work inside the housing, in order to prevent a worker from carelessly holding his hand in the clutch housing during maintenance work around the clutch. Must be shielded. That is,
The clutch housing cover 102 must be detachably attached to the clutch housing main body 101.

In order to detachably attach the clutch housing cover to the clutch housing body, usually,
A plurality of bolts are used. For example, in FIG. 6, four bolts 106 supported by the clutch housing cover 102 are respectively inserted into four screw holes 105 provided around the opening 103 and in the upper end surface of the clutch housing body 101. It is detachably attached to the clutch housing main body 101 by screwing.

[0005]

However, in the example shown in FIG. 6, in order to attach the clutch housing cover 102 to the clutch housing main body 101 in a stable state, at least three (preferably four) or more. Since it is necessary to use the bolt 106, the bolt 10
The operation at the time of manufacturing to open the screw holes 105 in the number corresponding to the number 6 is complicated and takes a long time. In addition, the work of removing and attaching the clutch housing cover 102 performed during the maintenance of the inside of the clutch housing is complicated and takes a long time according to the number of the bolts 106. The mounting structure of the clutch housing cover 102 as shown in FIG. 6 increases the number of manufacturing steps due to the necessity of providing a relatively large number of screw holes 105 and increases the number of bolts 106 to be used. It also has the disadvantage of increasing manufacturing costs.

On the other hand, the bolt 106 shown in FIG.
By replacing the screw hole 105 with a simple hole or recess by projecting the housing cover 102 into the housing body by fitting the protrusion and the hole or recess without screwing with a bolt. It is conceivable to attach to 101. However, in this case, the housing cover 102 is detached from the housing main body 101 only by simply pulling the housing cover 102 upward, and the mounting stability of the housing cover 102 is lacking.

In the case of the structure shown in FIG. 6, the housing cover 102 and the housing body 101 are in contact with each other at a relatively large area except at the place where they are fastened with the bolts 106. Noise may occur due to repeated collisions with the housing main body 101 in a minute cycle due to engine vibration or the like.

[0008] The above-mentioned problem is caused not only in the clutch housing of a manual transmission type forklift, but also in other housings provided in an industrial vehicle such as a torque converter housing provided in an automatic transmission type forklift. Has also occurred.

Accordingly, a main object of the present invention is to reduce the number of fasteners such as bolts that need to be used, to enable relatively low-cost manufacturing by a simple operation with a relatively small number of manufacturing steps. An object of the present invention is to provide an installation structure of a housing cover in an industrial vehicle, in which removal and installation of the cover can be performed in a short time and simple operation.

It is a further object of the present invention to provide a housing cover mounting structure for an industrial vehicle having excellent housing cover mounting stability.

It is another object of the present invention to provide a housing cover mounting structure for an industrial vehicle in which noise due to repeated collision between the housing cover and the housing main body in a minute cycle is less likely to occur.

[0012]

According to a first aspect of the present invention, a housing cover mounting structure for an industrial vehicle includes a housing main body in which members are housed, and a housing cover that covers an opening provided in the housing main body. ing. Here, the housing main body may be any housing main body existing in an industrial vehicle, such as the clutch housing main body as described above. Further, a rotating body such as a clutch disk may be housed therein, or a fixed member may be housed therein. The opening may be provided on any surface of the housing body. The opening may be provided, for example, on the upper end surface of the housing main body, or may be provided on the lower end surface or side surface. Also, the housing cover does not need to close the entire surface of the opening without a gap, and a gap may be provided between the housing cover and the housing body.

Further, in the first aspect, the housing cover is detachably attached to the housing main body by fitting at one or both of a pair of parts facing the opening of the housing main body. Can be attached. The fitting is realized between a convex portion and a hole or a concave portion provided in the housing main body and the housing cover so as to be paired with each other. Here, the pair of portions facing the opening of the housing body do not necessarily need to face each other in parallel,
For example, they may intersect at an acute or obtuse angle, such as two adjacent sides of a triangle. In addition, each of the pair of parts,
It may be composed of one plane or curved surface, or may be composed of a plurality of planes or curved surfaces. In addition, a pair of a convex part and a hole or a concave part is one for each part.
Only one may be provided, or a plurality may be provided. From the viewpoint of housing cover installation stability,
It is preferable that a plurality of pairs of convex portions and holes or concave portions are provided for one portion. In addition, the convex portion and the hole or the concave portion may be provided in any combination on the housing body and the housing cover. For example, a convex portion may be provided on the housing body and a hole or a concave portion may be provided on the housing cover at both portions of the pair of portions, or one of the pair of portions may have a convex portion on the housing body. The housing cover may be provided with holes or recesses, while the housing body may be provided with holes or recesses and the housing cover may be provided with protrusions. In the case where a plurality of pairs of a convex portion and a hole or a concave portion are provided for one portion, for example, a convex portion is provided on a housing main body for one pair, and a hole or a concave portion is provided on the housing main body for another pair. May be provided.

As described above, according to the first aspect, the housing cover can be detachably attached to the housing body by fitting at least one of the pair of parts facing the opening of the housing body. is there. Therefore, there is no need to use any fasteners such as bolts or the number of fasteners is reduced, and the number of necessary screw holes is correspondingly reduced. Therefore, the manufacturing can be performed at a low cost by a simple operation with a relatively small number of manufacturing steps, and the housing cover can be removed and attached by a simple operation in a short time.

Further, since the housing cover is disposed by fitting between the pair of portions facing the opening of the housing body, the housing cover is fitted by fitting both of the pair of portions. Even if it is attached to the housing, the housing cover will not be removed from the housing body unless the housing cover is bent to release the fitting. Therefore, unlike a case where the bolt 106 shown in FIG. 6 is replaced with a simple downward convex portion and the screw hole 105 is replaced with a simple hole or concave portion, for example, the housing cover is in a stable state with respect to the housing body. It is possible to attach with.

According to a second aspect of the present invention, there is provided an industrial vehicle mounting structure for mounting a housing cover, wherein a contact surface between the convex portion and the hole or the concave portion is provided with the convex portion as the housing body and the housing cover approach each other. The hole or the concave portion has a tapered surface so as to be in close contact with each other. Here, the tapered surface may be only on the outer peripheral surface of the convex portion, may be only on the inner peripheral surface of the hole or the concave portion, or may be on both the convex portion and the hole or the concave portion. . In the second aspect, since such a tapered surface is provided, the distance between the pair of portions facing the opening and the length of the housing cover in the direction in which the pair of portions face each other are appropriately adjusted. By doing so, when the housing cover is attached to the housing main body, the housing cover is urged in a direction approaching the housing main body due to the elasticity of the housing cover, so that the convex portion and the hole or the concave portion come into contact with each other. It comes into close contact with the surface. Therefore, the housing cover is attached to the housing body in a more stable state without play.

According to the second aspect of the present invention, since the tapered surface as described above is provided, a part of the pair of parts facing the opening of the housing main body on the side where the fitting is performed is provided. As a result, the housing cover is in a state of being floated from the housing main body, so that the contact area between the housing cover and the housing main body becomes very small. For this reason, noise due to repeated collision between the housing cover and the housing main body in a minute cycle is hardly generated.

According to a third aspect of the present invention, in the industrial vehicle, the mounting structure of the housing cover has an outer periphery in which the convex portion has a tapered surface. Here, the protrusion may be provided on the housing cover or on the housing body. According to the third aspect, the convex portion has an outer periphery having a tapered tapered surface, and the convex portion is formed as compared with a case where the inner periphery of a hole or a concave portion provided in a relatively thin plate material has a tapered surface. Does not require high dimensional accuracy. Therefore, it is possible to easily form the convex portion and the hole or the concave portion.

In the industrial vehicle according to a fourth aspect of the present invention, an elastic body is interposed between the convex portion and the hole or the concave portion. Here, as the elastic body, any known elastic material other than rubber can be used. The elastic body may cover the outer periphery of the convex portion, may cover the inner periphery of the hole or the concave portion, or may be provided separately so as to cover both of them. May be used.
According to the fourth aspect, the same effect as in the second aspect can be obtained without performing a complicated process requiring high accuracy, such as forming the outer periphery of the convex portion on a tapered surface. The contact surface may be tapered, and the tapered surface may be further covered with a thin elastic body.

According to a fifth aspect of the present invention, in the industrial vehicle, the fitting is performed only at one of a pair of portions facing the opening of the housing body. In the other part, the housing cover is detachably fixed to the housing main body by a fastener. Here, as the fastener, any known fastener can be used as long as the housing cover such as a bolt can be detachably fixed. According to the fifth aspect, the fastener is used as a part of the attachment of the housing cover to the housing body at the expense of the number of manufacturing steps, the manufacturing cost, and the labor required for removing and attaching the housing cover. Can be securely attached to the housing body in a more stable state.

According to a sixth aspect of the present invention, in the industrial vehicle, the fitting of the housing cover is performed at both of a pair of portions facing the opening of the housing body. According to the sixth aspect, since the housing cover is detachably attached to the housing body only by fitting the convex portion and the hole or the concave portion without using a fastener, it is not necessary to use a fastener such as a bolt at all. The production can be performed at low cost by a simple operation with a very small number of production steps, and the removal and attachment of the housing cover can be performed in a very short and simple operation.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing a mounting structure of a clutch housing cover in a manual transmission type forklift according to a first embodiment of the present invention. FIG. 2 is a sectional view taken along the line II-II of FIG. 1 in a state where the clutch housing cover is attached to the clutch housing body.
FIG. 3 is a plan view of the clutch housing shown in FIG.

As shown in FIGS. 1 to 3, in the present embodiment, an opening 3 is provided at an upper end surface of a clutch housing main body (hereinafter referred to as "main body") 1 to enable maintenance inside the housing. Is provided. This opening 3
Has a substantially trapezoidal shape, and is shielded by the cover 2 when the clutch housing cover (hereinafter referred to as “cover”) 2 is attached to the main body 1. Cover 2
Has substantially the same planar shape as the opening 3. The main body 1 and the cover 2 may be cast or press-formed from a metal material such as aluminum or iron.
Although not shown, a clutch-related member such as a clutch disk is disposed inside the main body 1.

Near the upper end of the plane 11a facing the opening 3 of the main body 1, two bosses 12 horizontally separated from each other are provided.
a and 12b are provided. The bosses 12a and 12b may be formed integrally with the main body 1. As explained later,
The bosses 12a and 12b have tapered outer peripheral surfaces. Further, a portion of the main body 1 facing the plane 11a is a flat end plate 10, and two screws horizontally separated from each other are provided near the upper end of the plane 11b facing the opening 3 of the end plate 10. Holes 13a, 1
3b is provided. The two planes 11a, 11b are substantially parallel.

The end of the cover 2 on the side corresponding to the bosses 12a and 12b is a bent portion 21 bent downward, and the bent portion 21 has two holes so as to be paired with the bosses 12a and 12b. 22a and 22b are provided in a state where they are horizontally separated from each other. Further, a bolt 3 is provided at an end of the cover 2 on the side corresponding to the screw holes 13a and 13b.
1a, 31b and washers 32a, 32b are stably arranged and the recesses 23 have a substantially semicircular vertical cross section so that the cover 2 can be fixed to the main body 1.
a, 23b and a bent portion 24 bent upward
And slots 25a and 25b formed at positions corresponding to the concave portions 23a and 23b of the bent portion 24, respectively. Recesses 23a, 23b and slot 25
a, 25b are screw holes 13a, 1
3b.

The ends of the cover 2 on the sides corresponding to the screw holes 13a, 13b are bent portions 26a, 26b whose both sides are bent downward. Bent portion 26a,
26b is the cover 2 on the side of the end plate 10.
It extends on the end plate 10 so that there is no gap between the body and the body 1. Further, a plurality of louvers 28 each having a small opening are provided on the upper surface of the cover 2 in order to efficiently release heat generated in the main body 1 to the outside.

Next, the shapes of the bosses 12a and 12b will be described. FIG. 4A shows the boss 1 in the present embodiment.
FIG. 4 is an enlarged sectional view illustrating a fitting portion between a hole 2a and a hole 22a.
Although not shown in detail, the boss 12b and the hole 2
2b is also formed in the same shape as the boss 12a and the hole 22a, respectively. As is clear from FIG.
The boss 12a has a tapered outer peripheral surface. In the present embodiment, these values are adjusted so that the inner diameter of the hole 22a is a value between the outer diameter of the tip of the boss 12a and the outer diameter of the root. Therefore, the plane 1 of the main body 1
As the bent portion 1a and the bent portion 21 of the cover 2 approach, the distance between the boss 12a and the hole 22a decreases,
After the two come into contact with each other, the main body 1 and the cover 2 press against each other due to the elastic force, so that the boss 12a and the hole 22a come into closer contact with each other. Then, the bent portion 21 finally becomes the boss 1
A predetermined position located between the outer diameter of the tip and the outer diameter of the root of 2a is reached, and it is no longer possible to approach the main body 1 beyond this predetermined position.

To attach the cover 2 to the main body 1, first, the bosses 12 a and 12 b of the main body 1 and the holes 22
a, 22b, the bosses 12a, 12b and the holes 22a, 22b are fitted, and the bent portion 2 of the cover 2
1 is as close to the plane 11a as possible. Next, the recess 23
bolts 31a, 31b and washer 32
a, 32b are arranged, and the cover 2 is gradually rotated from the upper side to the lower side around the bent portion 21 while bending the cover 2 so that the tip positions of the bolts 31a, 31b are inserted into the screw holes 13a, 13b of the end plate 10. Match. And
The cover 2 is fixed to the main body 1 by tightening the bolts 31a and 31b as much as possible.

In this embodiment, the distance between the two planes 11a and 11b of the body 1 and the two planes 11a and 11b
The length of the cover 2 with respect to the facing direction of the
When the bosses 1a and 31b are completely tightened, the bosses 12a and 12b and the holes 22a and 22b are brought into close contact with each other at the above-mentioned predetermined positions, and the cover 2 is slightly bent. The value is adjusted so as to be urged in the direction approaching 11a. Therefore, when the bolts 31a and 31b are completely tightened, the bosses 12a and
To release the engagement between the holes 12a and the holes 22a and 22b, the cover 2 must be further bent against the urging force until the holes 22a and 22b come to the tips of the bosses 12a and 12b. Thus, the bosses 12a, 12b and the holes 22
a and 22b are released from the bosses 12a and 12b.
Although it depends on the length of b, the material of the cover 2, and the like, it is not usually easy. That is, in the present embodiment, the cover 2 is attached to the main body 1 in a stable state without rattling.

In this embodiment, the bolts 31a,
When the bent portion 21b is completely tightened, the bent portion 21 is located at a predetermined position between the outer diameter of the tip of the boss 12a and the outer diameter of the root, and the outer peripheral surfaces of the bosses 12a and 12b
a and 22b are in close contact with the inner peripheral surface. That is, at this time, the bent portion 21 of the cover 2 is in a state of being floating from the main body 1 so to speak, and the contact area between the bent portion 21 of the cover 2 and the main body 1 is determined by the bosses 12a and 12b and the holes 22a and 2a.
2b is only a small area of the fitting portion. FIG.
As is clear from FIG. 2, when the cover 2 is attached to the main body 1, the cover 2 is separated from the main body 1 in a relatively large part other than the fitting portion with the bosses 12 a and 12 b and the fastening portion with the bolts 31 a and 31 b. Separated. As a result, the heat generated inside the main body 1 can be efficiently released to the outside, and even if external vibration caused by an engine or the like is transmitted to the cover 2, the cover 2 and the main body 1
The noise caused by the repeated collision between the two and in a very short period is hardly generated.

As shown in FIG. 3, in the present embodiment, when the cover 2 and the main body 1 are observed from vertically above with the cover 2 attached, except for a part near the plane 11a, the opening 3 Most parts are shielded by the cover 2. Therefore, an object rarely falls into the main body 1 during maintenance work of a portion other than the clutch.

When the cover 2 is to be removed from the main body 1, the bolts 31a and 31b are loosened, the cover 2 is rotated upward about the bent portion 21 to some extent, and then the bosses 12a and 12b and the holes 22a and 22b are removed. The cover 2 may be pulled in a direction in which the engagement with the cover 2 is released.

As described above, according to the present embodiment, the simple structure using the two bolts 31a and 31b allows the cover 2 to be attached and detached in a short and simple operation. become. Also, since the number of bolts 31a and 31b used is two, screw holes 13a and
The number of 3b may be two, and the process for providing a screw hole is simplified, for example, as compared with the structure shown in FIG. Therefore, it is possible to manufacture the cover 2 at a low cost by a simple operation with a relatively small number of manufacturing steps, and it is possible to remove and attach the cover 2 by a simple operation in a short time, and to maintain the clutch housing. Can be performed quickly.

In this embodiment, the opening 3 of the main body 1 is used.
The bosses 12a and 12b are used to fit only one plane 11a of the pair of planes 11a and 11b facing each other, and the cover 2 is attached to the main body 1 using bolts 31a and 31b on the other plane 11b. It is detachably fixed to. Therefore, even if the fitting on the flat surface 11a side is released due to an external force, the fastening by the bolts 31a and 31b is not suddenly loosened by the external force, and the cover 2 is removed from the main body 1. The situation in which the cover 2 is completely removed can be avoided, and the cover 2 can be attached to the main body 1 in a very stable state.

Next, in this embodiment, a modified example of the fitting portion between the cover 2 and the main body 1 will be described with reference to FIGS. 4B to 4D which are similar to FIG. 4A. In addition, although only one of the two fitting portions is shown in these drawings, it is assumed that the other is formed in the same shape. In these drawings, the same reference numerals are used for portions corresponding to FIG.

In the modification shown in FIG. 4B, the boss 42a
Has a cylindrical surface, and an annular rubber member 43a covering the hole 22a is disposed on the inner periphery of the hole 22a.
The inner diameter of the rubber member 43a is adjusted to be slightly smaller than the outer diameter of the boss 42a. Therefore, the boss 42a
When the cover 2 is fitted into the hole 22a, the cover 2 is attached to the main body 1 in a stable state without rattling. Moreover, in this modification, the boss 42a is
Even if the rubber member 43a does not have to be formed on a tapered surface with high precision as in (a), the manufacturing process of the boss 42a can be greatly simplified because the rubber member 43a absorbs some manufacturing errors. Note that the rubber member may be provided on the outer peripheral surface of the boss 42a.

In the modification shown in FIG. 4C, the main body 1 is provided with a concave portion 45a having a cylindrical inner peripheral surface,
Is provided with a boss 46a having a tapered surface on the outer periphery. Also in this case, as in the case of FIG. 4A, the boss 46a and the concave portion 45a come into close contact with each other as the cover 2 comes closer to the main body 1, and the cover 2 stably rests on the main body 1. Can be attached without sticking.

In the modification shown in FIG. 4D, the main body 1 is provided with a concave portion 47a having a cylindrical inner peripheral surface,
A boss 48a having a columnar outer peripheral surface is provided on the bent portion 21 of FIG. 1, and the boss 48a is further covered with a rubber member 49a. The outer diameter of the rubber member 49a is adjusted to be slightly larger than the inner diameter of the recess 47a. Therefore, boss 4
When the cover 2 is engaged with the recess 47a, the cover 2
Cover 2 in a stable state without rattling
Is attached. The rubber member may be provided on the inner peripheral surface of the recess 47a.

In this embodiment, the fitting is performed as shown in FIG.
The present invention is not limited to the examples shown in FIGS. 4A to 4D. For example, in the example shown in FIG. 4A, even if the inner peripheral surface of the hole 22a is tapered instead of the boss 12a, the fitting can be realized. Good. However, in this case, very high accuracy is required as the dimensional accuracy of the hole 22a. Therefore, while the outer peripheral surface of the boss 12a remains a tapered surface, the inner peripheral surface of the hole 22a is
It is preferable that the tapered surface conforms to the shape of 2a.
By doing so, high dimensional accuracy is not required for the boss or the hole as in the case of FIG. Further, as another example, the outer peripheral surface of the boss 46a is covered with a rubber member in the example of FIG. 4C, and the outer peripheral surface of the boss 48a is covered with a rubber member 49a in the example of FIG. Recess 47a
The fitting may be realized by coating the inner peripheral surface with another rubber member.

Next, a second embodiment of the present invention will be described with reference to FIG. In FIG. 5, FIG.
The same reference numerals are used for members corresponding to and the description is omitted. FIG. 5 is an exploded perspective view showing a mounting structure of a clutch housing cover in a manual transmission type forklift according to a second embodiment of the present invention.

As shown in FIG. 5, in the present embodiment, an opening 3 is provided in the upper end surface of the main body 1. The opening 3 is shielded by the cover 2 when the cover 2 is attached to the main body 1. In the vicinity of the upper end of the plane 11a facing the opening 3 of the main body 1, two bosses 12a and 12b horizontally separated from each other are provided. A portion of the main body 1 facing the flat surface 11a is a flat end plate 10, and two bosses horizontally separated from each other are provided near the upper end of the flat surface 11b facing the opening 3 of the end plate 10. 53a and 53b are provided.

The end of the cover 2 on the side corresponding to the bosses 12a and 12b is a bent portion 21 bent downward, and the bent portion 21 has two holes so as to be paired with the bosses 12a and 12b. 22a and 22b are provided in a state where they are horizontally separated from each other. A bent portion 54 bent upward is provided at an end of the cover 2 on the side corresponding to the bosses 53a and 53b, and the bent portion 54 has holes 55 at positions corresponding to the bosses 53a and 53b.
a and 55b are provided.

In this embodiment, the bosses 53a, 53
b has a shorter length than the bosses 12a and 12b on the side of the plane 11a, but similarly has an outer peripheral surface which is a tapered surface. In the present embodiment, the hole 55
These values are adjusted so that the inner diameters of a and 55b are the same as, but slightly larger than, the root outer diameters of the bosses 53a and 53b. Therefore, the holes 55a and 55b are
3a and 53b, the bent portion 54 is
Contact with b. Therefore, also in the present embodiment, as in the first embodiment, when the cover 2 and the main body 1 are observed from above vertically with the cover 2 attached, the plane 1
Most of the opening 3 is shielded by the cover 2 except for a part near 1a.

In the present embodiment, the cover 2 is
Bosses 12a, 12b and holes 22a, 2a
2b, the bosses 53a, 53b and the hole 55
a and 55b may be fitted. In the present embodiment, the distance between the two planes 11a and 11b of the main body 1 and the length of the cover 2 in the direction in which the two planes 11a and 11b face each other are such that the holes 55a and 55b fit into the bosses 53a and 53b. When the bent portion 54 is in contact with the flat surface 11b, the bosses 53a, 53b and the holes 55a, 55b are in close contact with the predetermined positions described in the first embodiment, so that the cover 2 is slightly bent. The value is adjusted so that the bent portion 21 is urged in the direction approaching the plane 11a by the elasticity of the cover 2. Therefore, the bent portion 5
It is usually not easy to release the engagement between the bosses 12a and 12b and the holes 22a and 22b in a state in which the boss 4 is in contact with the flat surface 11b. That is, in the present embodiment, the cover 2 is attached to the main body 1 in a stable state without rattling.

Also in this embodiment, the bent portion 54
Is in contact with the flat surface 11b, the bent portion 21 of the cover 2 is in a state of floating from the main body 1, and the contact area between the bent portion 21 of the cover 2 and the main body 1 is the boss 12
a, 12b and holes 22a, 22b are only a small area of the fitting portion. Therefore, as in the first embodiment, even if external vibration caused by an engine or the like is transmitted to the cover 2, almost no noise is generated due to repeated collisions between the cover 2 and the main body 1 in a short cycle.

When removing the cover 2 from the main body 1, the fitting between the holes 55a, 55b and the bosses 53a, 53b is released, and the cover 2 is rotated upward about the bent portion 21 to some extent. Cover 2 in the direction in which the engagement between the bosses 12a and 12b and the holes 22a and 22b is released.
Just pull it. In the present embodiment, the bosses 53a,
Since the height of 3b is lower than the bosses 12a and 12b, the fitting between the holes 55a and 55b and the bosses 53a and 53b can be relatively easily released by bending the cover 2 to some extent. . However, if the fitting can be released too easily, the mounting stability of the cover 2 is lost. Therefore, the height of the bosses 53a and 53b is determined in consideration of the mounting stability of the cover 2 and the ease of releasing the fitting. It is preferable to determine it.

In this embodiment, the cover 2
Of the side corresponding to the bosses 53a, 53b are bent portions 26a, 26b whose both sides are bent downward. The bent portions 26a, 26b are formed by the cover 2 and the main body on the side of the end plate 10. 1 on the end plate 10 so that there is no gap between them.
Therefore, when the cover 2 is pressed down from above by an external force, the bent portions 26a, 2b
6b supports the cover 2 and prevents the cover 2 from moving downward. Thereby, even if the cover 2 is pushed down from above, the holes 55a and 55b and the boss 53
a, 53b is not released.

As described above, in this embodiment, since the cover 2 can be attached without using any bolts, the attachment / detachment work of the cover 2 can be performed in a very short and simple operation. . Further, since it is not necessary to use bolts, it is possible to reduce the manufacturing cost of the cover 2. In the present embodiment, various modifications as described with reference to FIGS. 4B to 4D can be adopted for the fitting portion.

The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and various design changes can be made within the scope of the claims. It is. For example, in the above-described embodiment, the length of the cover 2 in the facing direction of the pair of flat surfaces 11a, 11b is adjusted to a length such that the bosses 12a, 12b are in close contact with the holes 22a, 22b at the fitting portion. However, the cover 2 is formed shorter than the length,
May be slightly shaky with respect to the main body 1. Even in such a case, since the fitting cannot be released unless the cover 2 is bent, the cover 2 can be stably attached to the main body 1.

In the above-described embodiment, two bosses 12a and 12b are provided on the plane 11a.
One or three or more bosses may be provided in 1a. However, in consideration of the mounting stability of the cover 2, it is preferable to provide at least two bosses. Similarly, the number of bolts used in the first embodiment is not limited to two, and one bolt 11b may be used.
However, one or three or more bolts may be used.

In the above-described embodiment, two bosses 12a and 12b are provided on one plane 11a. However, a plurality of bosses are provided dispersedly on two or more adjacent planes or curved surfaces. You may. Further, in the above-described embodiment, the pair of opposed parts is the two flat surfaces 11 opposed to each other.
a and 11b, for example, when the opening provided in the main body is circular, an appropriately selected paired position in one cylindrical curved surface facing the opening is referred to as the “facing” in the present invention. Pair of sites ".

In the example shown in FIGS. 4A and 4B, the cover 2 may be provided with a concave portion instead of the hole 22a, as shown in FIGS. 4C and 4D. In the example, holes may be provided in the main body 1 instead of the concave portions 45a and 47a. Further, the shape of the boss, the hole, or the concave portion is not limited to the illustrated one, but may be any shape according to the object of the present invention. Further, the cover 2 may be fixed with bolts on the flat surface 11a side, and fitting with the boss and the hole may be performed on the 11b side. Further, the present invention is not limited to the mounting structure of the clutch housing cover in the manual transmission type forklift as in the above-described embodiment, but may be applied to other housing covers of an industrial vehicle (for example, a torque converter in an automatic transmission type forklift). Of the housing cover).

[0053]

As described above, according to the first aspect, the necessity of using fasteners such as bolts is completely eliminated or the number of fasteners is reduced, and the number of necessary screw holes is correspondingly reduced. Accordingly, it is possible to manufacture the device at low cost by a simple operation with a relatively small number of manufacturing steps, and it is possible to remove and attach the housing cover by a simple operation in a short time. In addition, since the housing cover is arranged by fitting between the pair of portions facing the opening of the housing body, the housing cover can be attached to the housing body in a stable state. .

According to the second aspect, when the housing cover is attached to the housing main body, the housing cover is urged in a direction approaching the housing main body due to the elasticity of the housing cover, so that the convex portion and the hole or the concave portion are formed. It comes into close contact with the contact surface. Therefore, the housing cover is attached to the housing body in a more stable state without play. According to the second aspect, the contact area between the housing cover and the housing main body is very small, and noise due to repeated collision between the housing cover and the housing main body in a minute cycle is hardly generated.

According to the third aspect, a high dimensional accuracy is not required for the convex portion, and the convex portion and the hole or the concave portion can be easily formed. According to the fourth aspect, the same effect as in the second aspect can be obtained without performing a complicated process requiring high accuracy, such as forming the outer periphery of the convex portion on a tapered surface. According to claim 5,
The housing cover can be securely attached to the housing body in a more stable state. According to claim 6,
There is no need to use any fasteners such as bolts, so it is possible to manufacture at low cost by simple work with very few manufacturing steps, and to remove and install the housing cover in a very short time and simple work. It is possible.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a mounting structure of a clutch housing cover in a manual transmission type forklift according to a first embodiment of the present invention.

FIG. 2 shows the state of FIG. 1 with the cover attached to the main body.
FIG. 2 is a sectional view taken along the line II-II.

FIG. 3 is a plan view of the clutch housing shown in FIG. 1;

FIG. 4 is an enlarged sectional view illustrating a fitting portion according to the first embodiment of the present invention and its modification.

FIG. 5 is an exploded perspective view showing a mounting structure of a clutch housing cover in a manual transmission type forklift according to a second embodiment of the present invention.

FIG. 6 is an exploded perspective view illustrating a schematic structure of a general clutch housing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clutch housing main body 2 Clutch housing cover 3 Opening 10 End plate 11a, 11b Plane 12a, 12b Boss 13a, 13b Screw hole 21 Folding part 22a, 22b Hole 23a, 23b Recess 24 Folding part 25a, 25b Slot 26a, 26b Folding part 31a , 31b bolt

Claims (6)

[Claims] A housing body accommodating a member therein; and a housing cover for shielding an opening provided in the housing body, wherein the housing cover faces the opening of the housing body. At least one of a pair of opposing portions is detachable from the housing main body by fitting a convex portion and a hole or a concave portion provided in the housing main body and the housing cover so as to form a pair with each other. A housing cover mounting structure for an industrial vehicle, wherein the housing cover can be mounted on a housing. 2. A contact surface between the convex portion and the hole or the concave portion has a tapered surface such that the convex portion and the hole or the concave portion come into close contact with each other as the housing body and the housing cover approach each other. The mounting structure of the housing cover in the industrial vehicle according to claim 1, wherein the housing cover is attached. 3. The mounting structure of an industrial vehicle according to claim 2, wherein the convex portion has an outer periphery that is a tapered surface. 4. The structure for mounting a housing cover on an industrial vehicle according to claim 1, wherein an elastic body is interposed between said convex portion and said hole or concave portion. . 5. The fitting is performed only in one of a pair of portions facing the opening of the housing main body, and in the other portion, the housing cover is fixed by a fastener. 5. The housing according to claim 1, wherein said housing is detachably fixed to said housing body.
The mounting structure of the housing cover in the industrial vehicle according to any one of the above. 6. The industry according to claim 1, wherein the fitting is performed at both of a pair of portions facing the opening of the housing body. Mounting structure of the housing cover in the vehicle.