JPH05272594A - Transmission v-belt - Google Patents

Abstract

PURPOSE:To reduce the friction force and improve the transmission efficiency by providing a lubricant feed groove connecting at least one of a projection and a recess to the V-belt inner periphery side edge face of a block on the contact face of the block. CONSTITUTION:A projection 13c is formed on the first contact face 13h of a block 13, a rocking edge 13g serving as the tilting fulcrum of the block 13 when a transmission V-belt 11 is wound on a V-pulley 4 is provided, and a recess 13d is formed on the second contact face 13i on the opposite side to the first contact face 13h. A lubricant feed groove 13f connecting the projection 13c to the transmission V-belt inner periphery side edge face 13e is formed. A lubricant is fed to the projection 13c from a block edge face 13e through the lubricant feed groove 13f, the friction force generated by the contact between the projection 13c and the recess 13d is reduced, and the transmission efficiency of the transmission V-belt 11 can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission V-belt used in a belt type continuously variable transmission and the like.

[0002]

2. Description of the Related Art A conventional transmission V-belt is disclosed in, for example, Japanese Utility Model Laid-Open No. 2-72837.

FIG. 14 is a sectional view showing a state in which the transmission V-belt 1 in such a conventional technique is engaged with the V-shaped pulley 4. As shown in the figure, a transmission V-belt 1 is composed of two sets of endless layered bands 2 and a large number of blocks 3 having support grooves 3b for supporting these layered bands 2 formed on both sides. ing. A block inclined surface 3a is formed on both sides of the block 3, and a V groove inclined surface 4a is formed on the V-shaped pulley 4.

As shown in FIG. 15, the transmission V-belt 1 is wound around a set of V-shaped pulleys 4 and 4'to transmit power (note that the V-shaped pulley 4'is also a V-shaped pulley). The V-groove inclined surface 4a 'is formed in the same manner as in No. 4).

That is, from the V-shaped pulleys 4, 4'to the block 3
By the pressing force applied to the block, a frictional force is generated between the block inclined surface 3a and the V groove inclined surfaces 4a and 4a ', and the compression force acting between the blocks 3 is retained by the frictional force, and the V-shaped pulley is retained. Power is transmitted between 4, 4 '.

Incidentally, as shown in FIG. 16 which is an arrow I view of FIG. 14, a convex portion 3c is provided on the first contact surface 3h of the block 3.
Is formed and the second contact surface 3h is opposite to the second contact surface 3h.
A concave portion 3d is formed on the contact surface 3i, and when a plurality of blocks 3 are superposed, a pair of convex portion 3c and concave portion 3d are formed.
Are configured to fit together. As a result, the transmission V
Since the blocks 3 of the belt 1 are aligned and the parallelism between the blocks 3 is maintained, it is possible to prevent a reduction in transmission efficiency and a reduction in the life of the transmission V-belt 1.

[0007]

In the bent portion of the transmission V-belt 1 as described above, as shown in FIG. 17, the block 3 that starts to be wound around the V-shaped pulley 4 is the block 3 that is the trailing block 3 that is not wound yet. Although the rocking edge 3g is tilted as a fulcrum, the concave portion 3d of the block 3 which starts winding at this time and the convex portion 3c of the subsequent block 3 are in contact with each other. This phenomenon is the same not only when the transmission V-belt 1 is wound around the V-shaped pulley 4 as described above, but also when it is detached from the V-shaped pulley 4.

Further, the convex portion 3c between the adjacent blocks 3 is formed.
The contact between the concave portion 3d and the concave portion 3d occurs not only in the bent portion of the transmission V-belt 1 but also in the straight portion, and the string vibration of the transmission V-belt 1 between the V-shaped pulleys 4 and 4'and the block 3 with the convex portion 3c as a fulcrum. It is also seen when the pendulum vibration occurs.

However, such a transmission V-belt 1
Does not have a structure in which the convex portions 3c and the concave portions 3d of the block 3 are lubricated, the convex portions 3c and the concave portions 3d are not considered.
There is a problem in that a large frictional force acts due to the contact between the two and the transmission efficiency of the transmission V-belt 1 is reduced.

In the present invention, the convex portions 3c and the concave portions 3d of the block 3 are satisfactorily lubricated, and the convex portions 3c and the concave portions 3 are formed.
It is an object to obtain a transmission V-belt capable of reducing the frictional force caused by the contact with d and improving the transmission efficiency.

[0011]

In order to solve the above-mentioned problems, in the invention according to claim 1, an endless layered band in which a plurality of endless annular metal bands are superposed in close contact with each other, and the layered band Is a transmission V-belt constituted by a plurality of blocks arranged in a row continuously in contact with each other over the entire circumference of the V-shaped pulley and transmitting power by the first contact surface of the block. The convex portion is formed on the upper side, and the concave portion is formed on the second contact surface on the side opposite to the first contact surface so that the pair of the convex portion and the concave portion fit when a large number of blocks are superposed. In the transmission V-belt configured to fit together, on the contact surface of the block, a lubricating oil supply groove that connects at least one of the convex portion and the concave portion and the inner peripheral side edge surface of the transmission V-belt of the block is provided. It is characterized by being provided.

Further, the invention according to claim 2 is characterized in that the block is provided with a lubricating oil hole for communicating between the convex portion and the concave portion.

Further, in the invention according to claim 3, a lubricating oil holding groove is provided on at least one of a fitting surface of the convex portion with the concave portion or a fitting surface of the concave portion with the convex portion. It is characterized by.

[0014]

According to the first aspect of the invention, the lubricating oil is supplied from the edge surface of the block on the inner peripheral side of the transmission V belt to the convex portion or the concave portion through the lubricating oil supply groove.

Further, in the second aspect of the invention, the lubricating oil supplied from the inner peripheral edge surface of the transmission V-belt of the block to the convex portion or the concave portion through the lubricating oil supply groove is the straight portion of the transmission V-belt. Also in the lubricating oil hole 23k.

Further, in the third aspect of the invention, the lubricating oil supplied from the transmission V-belt inner peripheral side edge surface of the block to the convex portion or the concave portion through the lubricating oil supply groove is held by the lubricating oil holding groove. It

[0017]

Embodiments of the present invention will be described below with reference to the drawings. In addition, the transmission V-belt 11 is similar to the transmission V-belt 1 in the prior art in that the blocks 13, 23, 33, 43 are provided.
Respectively correspond to block 3 in the prior art. Further, the same components as those of the conventional technique are designated by the same reference numerals and the description thereof will be omitted.

1 to 3 are views showing the configuration of a first embodiment of the present invention. FIG. 1 shows a transmission V-belt 11 having a V-shaped pulley 4
2 is a cross-sectional view showing a state of being engaged with, FIG.
FIG. 3 is a view on arrow B of FIG. 1, and FIG. 2 and FIG.
The configurations other than 3 are omitted.

As shown in FIG. 3, a convex portion 13c is formed on the first contact surface 13h of the block 13 as in the prior art, and the transmission V-belt 11 is wound around the V-shaped pulleys 4 and 4 '. A locking edge 13g that serves as a fulcrum of tilting of the block 13 when attached is provided. Furthermore, the first
The recess 1 is formed on the second contact surface 13i opposite to the contact surface 13h.
3d is formed.

In this embodiment, in addition to these, FIG.
As is apparent from the above, the protrusion 13 is formed on the first contact surface 13h.
A lubricating oil supply groove 1 that connects between c and the transmission V-belt inner peripheral side edge surface of the block (hereinafter, simply referred to as block edge surface) 13e
3f is formed. As a result, the lubricating oil passes through the lubricating oil supply groove 13f from the block edge surface 13e and the convex portion 13c.
Therefore, the frictional force generated by the contact between the convex portion 13c and the concave portion 13d is reduced, and the transmission V-belt 11
The transmission efficiency of is improved.

Next, a second embodiment of the present invention will be described. 4 to 6 are views showing the configuration of the second embodiment of the present invention, FIG. 4 is a front view of a block 23 applied to a transmission V-belt (not shown) of the second embodiment, and FIG. View C of 4
6 and 6 are views taken in the direction of arrow D in FIG.

In this embodiment, the same lubricating oil supply groove as in the first embodiment is provided with the second contact surface 2 provided with the recess 23d.
It is provided on 3i. That is, the lubricating oil supply groove 23j that connects the recess 23d and the block edge surface 23e is formed on the second contact surface 23i. As a result, the lubricating oil is supplied from the block edge surface 23e to the concave portion 23d through the lubricating oil supply groove 23j, and the frictional force due to the contact between the convex portion 23c and the concave portion 23d is reduced as in the first embodiment. ..

Further, in this embodiment, a lubricating oil hole 23k is provided which connects between the convex portion 23c and the concave portion 23d of the block 23. As a result, even in the straight portion of the transmission V-belt, the lubricating oil supplied to the concave portion 23d is retained in the lubricating oil hole 23k, which is caused by the string vibration of the transmission V-belt and the pendulum vibration of the block 23 with the convex portion 23c as a fulcrum. Convex portion 23c
The contact frictional force between the concave portion 23d and the concave portion 23d can be reduced more effectively.

In addition to the structure of this embodiment, a lubricating oil supply groove 23f may be formed on the first contact surface 23h, which connects the convex portion 23c and the block edge surface 23e as in the first embodiment. In this case, the above effect can be more remarkably exhibited.

Next, a third embodiment of the present invention will be described. 7 to 9 are views showing the configuration of the third embodiment of the present invention, FIG. 7 is a front view of a block 33 applied to a transmission V-belt (not shown) of the third embodiment, and FIG. Arrow E of 7
FIG. 9 and FIG. 9 are views taken in the direction of arrow F in FIG.

In this embodiment, as in the second embodiment, the second
A lubricating oil supply groove 33j connecting the recess 33d and the block edge surface 33e is formed on the contact surface 33i. In addition to this, a layered band (illustrated in the figure) is formed on the contact surface of the recess 33d with the projection 33c. (Omitted) Lubricating oil holding groove 33 parallel to the traveling direction
m, and an oil groove 33p is formed on the contact surface 33n of the block 33 with the layered band. A lubricating oil supply groove 33q is provided on the second contact surface 33i in parallel with the lubricating oil supply groove 33j, and connects the block edge surface 33e and the oil groove 33p.

With the above structure, the lubricating oil reaches the concave portion 33d from the block edge surface 33e through the lubricating oil supply groove 33j and is stored in the lubricating oil holding groove 33m. The frictional force generated by the contact with the recess 33d is reduced, and the transmission efficiency of the transmission V-belt is improved. In particular, since the convex portion 33c and the concave portion 33d are fitted to each other in the straight portion of the transmission V-belt, the lubricating oil is more effectively stored in the lubricating oil holding groove 33m, and the above effect can be more remarkably exhibited. ..

Further, conventionally, a speed difference occurs between the layered band and the block 33 due to the rotation of the transmission V-belt,
It is known that relative movement occurs between these two members (see Japanese Patent Laid-Open No. 3-219148), but in the present embodiment, lubricating oil is supplied from the block edge surface 33e to the lubricating oil supply groove 33q.
Is supplied to the oil groove 33p formed on the contact surface 33n with the layered band, through the layered band and the block 33.
The frictional force due to the relative movement with respect to is reduced, and the transmission efficiency of the transmission V-belt can be further improved.

In this embodiment, the lubricating oil holding groove 33m is parallel to the traveling direction of the layered band.
Not limited to this, the lubricating oil holding groove 133m may be formed in the circumferential direction of the recess 33d as shown in FIG. 10, or may be formed in a spiral shape (not shown).

Next, a fourth embodiment of the present invention will be described. 11 to 13 are views showing the configuration of the fourth embodiment of the present invention, FIG. 11 is a front view of a block 43 applied to a transmission V-belt (not shown) of the fourth embodiment, and FIG. 12 is a drawing. 1
1 is a view on arrow G in FIG. 1, and FIG. 13 is a view on arrow H in FIG. 11.

In this embodiment, as in the first embodiment, a lubricating oil supply groove 43f connecting the convex portion 43c and the block edge surface 43e is formed on the first contact surface 43h. In addition, the lubricating oil holding groove 4 parallel to the traveling direction of the layered band (not shown) is formed on the surface of the convex portion 43c perpendicular to the first contact surface 43h.
3 m is provided with a lubricating oil holding groove 43 r connected to the lubricating oil holding groove 43 m on a surface parallel to the first contact surface 43 h of the convex portion 43 c.

With this structure, the lubricating oil is stored in the lubricating oil holding grooves 43m and 43r from the block edge surface 43e through the lubricating oil supply groove 43f, so that the convex portions 43c and the concave portions 43d are formed as in the second embodiment. The frictional force generated by the contact with the belt is reduced, and the transmission efficiency of the transmission V-belt is improved. In particular, as in the third embodiment, since the convex portion 43c and the concave portion 43d are fitted in the straight portion of the transmission V-belt, the lubricating oil is more effectively stored in the lubricating oil holding grooves 43m and 43r, The above effect can be more remarkably exhibited.

In addition to the constructions of the above-mentioned first to fourth embodiments, a lubricating device for injecting lubricating oil near the transmission V belt winding position or the separating position of the V type pulleys 4 and 4 '(for example, Japanese Patent Laid-Open No. 63- If used together, the lubricating oil can be efficiently supplied to the convex portions and the concave portions of the block.

Needless to say, the configurations of the above-described first to fourth embodiments may be combined as appropriate.

[0035]

As described above, according to the first aspect of the invention, the lubricating oil supply groove is provided on the surface of the block to connect at least one of the convex portion and the concave portion to the block edge surface. As a result, since the lubricating oil is supplied from the block edge surface to the convex portion through the lubricating oil supply groove, the frictional force generated by the contact between the convex portion and the concave portion is reduced, and the transmission efficiency of the transmission V-belt is improved. Can be improved.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, the transmission V-belt is provided by providing the block with a lubricating oil hole communicating between the convex portion and the concave portion. The lubricating oil is held in the lubricating oil hole 23k even in the straight line portion of the above, and the contact frictional force between the convex portion and the concave portion caused by the string vibration of the transmission V belt and the pendulum vibration of the block with the convex portion as a fulcrum is more effective. Therefore, the transmission efficiency of the transmission V-belt can be further improved.

In the invention according to claim 3, the lubricating oil holding groove is provided on at least one of the contact surface of the convex portion with the concave portion or the contact surface of the concave portion with the convex portion, Since the lubricating oil supplied from the block edge surface through the lubricating oil supply groove is more effectively held in the convex portion or the concave portion, the frictional force generated by the contact between the convex portion and the concave portion is further reduced, It is possible to further improve the transmission efficiency of the transmission V-belt.

[Brief description of drawings]

FIG. 1 is a perspective view showing a transmission V belt according to a first embodiment of the present invention having a V
It is sectional drawing which shows the state engaged with the type pulley.

FIG. 2 is a view on arrow A in FIG.

FIG. 3 is a view on arrow B of FIG.

FIG. 4 is a front view of a block applied to a transmission V-belt according to a second embodiment of the present invention.

5 is a view on arrow C of FIG. 4. FIG.

FIG. 6 is a view on arrow D of FIG.

FIG. 7 is a front view of a block applied to a transmission V-belt according to a third embodiment of the present invention.

FIG. 8 is an E view taken in the direction of arrow in FIG.

9 is a view on arrow F of FIG. 7. FIG.

FIG. 10 is another example of the lubricating oil holding groove according to the third embodiment of the present invention.

FIG. 11 is a front view of a block applied to a transmission V-belt according to a fourth embodiment of the present invention.

12 is a view on arrow G in FIG. 7. FIG.

FIG. 13 is a view on arrow H of FIG. 7.

FIG. 14 is a sectional view showing a state in which a transmission V-belt according to a conventional technique is engaged with a V-shaped pulley.

FIG. 15 is a diagram showing a state in which a transmission V-belt according to a conventional technique is wound around a set of V-shaped pulleys.

16 is a view on arrow I of FIG.

FIG. 17 is a diagram showing a contact state between adjacent blocks in a bent portion of the transmission V-belt.

[Explanation of symbols]

 2 ... Layered band 4 ... V type pulley 11 ... Transmission V belt 13, 23, 33, 43 ... Block 13c, 23c, 33c, 43c ... Convex part 13d, 23d, 33d, 43d ... Recessed part 13e, 23e, 33e, 43e ... Block edge surface 13f, 23j, 33j, 43f ... Lubricating oil supply groove 13h, 23h, 33h, 43h ... First contact surface 13i, 23i, 33i, 43i ... Second contact surface 23k ... Lubricating oil hole 33m, 43m, 43r ... Lubricating oil holding hole

Claims (3)

[Claims] 1. An endless layered band in which a plurality of endless ring-shaped metal bands are superposed in close contact with each other, and a large number of blocks continuously arranged in contact with each other over the entire circumference of the layered band. A transmission V-belt for transmitting power by being wound around a V-shaped pulley, wherein a convex portion is formed on the first contact surface of the block,
A transmission V-belt in which a recess is formed on a second contact surface opposite to the first contact surface, and a pair of protrusions and recesses are fitted together when a large number of blocks are stacked. A transmission V is characterized in that a lubricating oil supply groove is provided on the contact surface of the block, the lubrication oil supply groove connecting at least one of the convex portion and the concave portion and the transmission V belt inner peripheral side edge surface of the block.
belt. 2. The transmission V-belt according to claim 1, wherein the block is provided with a lubricating oil hole communicating between the convex portion and the concave portion. 3. The lubricating oil holding groove is provided on at least one of the fitting surface of the convex portion with the concave portion or the fitting surface of the concave portion with the convex portion. The described transmission V-belt.