JPS596450A - Belt block of drive belt for torque transmitting device - Google Patents

Abstract

PURPOSE:To reduce a frictional force, and enhance durability and transmission efficiency of a drive belt to improve fatigue limit of an endless metal hoop, by continuously carrying V-shaped blocks through rolling members on the endless metal hoop. CONSTITUTION:Through-holes 7 and 8 parallel to an inclined line 6 are formed through both lateral members 4 and 5 of belt blocks 1, and pins 9 are inserted into the through-holes. Sleeves 10 having length greater than width of an endless metal hoop 11 are loosely fitted about the pins 9. A plurality of the V-shaped blocks 1 are continuously carried through the sleeves 10 on the endless metal hoop 11 to form a V belt.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a belt block for a drive belt for a torque transmission device.

A conventional drive belt 36 for a torque transmission device includes a carrier 11 in which endless metal bands 11 a, 1 l b . . . , and a large number of belt blocks 64 successively attached to the carrier 11 (see FIGS. 8 to 10).

The block 64 has a carrier groove 66 in the upper center of its main body 65 for accommodating the carrier 11.

Both side surfaces 35 a and 35 b of the main body portion 35 are inclined single moving surfaces 61 a of the V-shaped belt pulley 61 (and 32).

It has an inclined surface that can come into contact with 31b. A tilting surface 550 is formed on the front surface in the direction of movement of the main body part 35.
Also, the upper surface 3 of the main body portion 65 which is the bottom of the carrier fIt66
5d has a rounded upper surface that is rounded in the front and rear directions.

The belt block 64 does not match the innermost circumferential surface of the carrier 11 because the inclined line 67, which is the upper edge of the tilting surface 650, does not match the rounded upper surface 35d (see FIG. 10). For this reason, during the operation of the torsion transmitting device, the V-type belt pulley 31.3
2, the radius of curvature of the trajectory of the carrier 11 and the radius of curvature of the trajectory of the tilting surface 35C do not match, and the innermost endless metal band 11a of the carrier 11 and the rounded upper surface 35d of the belt block 34 are forced into relative motion, and slippage occurs between the two. Therefore, wear due to friction occurs in the endless metal belt 11a, and especially when the speed ratio between the V-shaped belt pulleys 51 and 62 is large, the slippage becomes large.
The transmission efficiency of the drive belt 66 deteriorates. Further, the belt block 64 is connected to the drive surface 31 of the V-shaped belt pulley 61 (and 62).
When a and 31bK bite into each other, the rounded upper surface 35d rotates around the 1st term diagonal line 67 as the center line, so the carrier 1
1 was subjected to a large local stress due to the rounded upper surface 35d of the belt block 64, which resulted in a disadvantage that the fatigue limit of the carrier 11 was lowered.

In view of the foregoing, the present invention has been made in view of the above, during operation of the torsion transmitting device.
*Torque that can eliminate the friction force generated between the two and improve the durability and transmission efficiency of the drive belt, and improve the fatigue limit of the carrier by eliminating local stress generated in the carrier. The object of the present invention is to provide a belt block for a drive belt for a transmission device.

Next, there is a metal main body 2 having the present invention based on a concrete example shown in the drawings. This main body part 2 is provided with a cut groove 6 having a width larger than the width of the carrier 11 at the lower center thereof. Then, on both sides of this cut groove 6, there are horizontal members 4.
and 5 are formed. The left and right side members 4 and 5 have both outer surfaces formed into beveled surfaces 4a and 5a, respectively, which abut on the drive surfaces of the V-shaped belt pulleys 31 and 32, respectively, as in the prior art.

The horizontal members 4 and 5 are formed with tilting surfaces 4b and 5b on their four faces (in the direction of travel), which are inclined backward by j1, as in the conventional art. Then, the valley and diagonal joint surfaces 4a of the one-piece members 4 and 5
and 5& and the upper edges of each #4 excitation area 4b and 5b are located on the same plane. If the upper edges of both tilting surfaces 4b and 5b are marked with a diagonal line 6, then the upper surface 3at-1 of the cut groove 6 is marked with a diagonal line 6.
It is located above Yoru. Belt block 1 is l11i
i Through holes 7 in the transverse members 4 and 5 parallel to the inclined line 6
and 8 are drilled, and round rod-shaped pins 9 are fitted into these through holes 7 and 8. And on this pin 9,
Endless metal strips 11 a, 1 l of vi number of carrier 11
A cylinder 1o whose length is longer than the width of b...11n is loosely fitted.

The belt block 1 formed as described above is assembled to the carrier 11 with the carrier 11 inserted into the space between the upper surface 6& of the notch 6 and the cylinder 10. In this way, the drive belt 12 is formed by continuously assembling the belt blocks 1 to the carrier 11 (the end 6
(see figure).

Next, we will explain the effect of this dormitory case.

Two V-shaped belt pulleys 31 of the top transmission device shown in FIG.
．． When the drive belt 12 is wound around the belt pulleys 31 and 32, each cylinder 10 of each belt block 1 placed in both the V-shaped belt pulleys 31 and 32 is pressed against the inner circumferential surface of the endless metal band 11a on the innermost circumference of the carrier 11. It is in a state of Of the belt blocks 1 located between both V-shaped belt pulleys 31 and 32, the one in the device consisting of the V-shaped belt pulley 61 on the drive side is the active end metal band 11n on the outermost periphery of the carrier 11. The upper surface 5a of the cross cut 6 is supported, and the cylinder 10 is supported by the endless metal band 11a on the innermost circumference of the carrier 11 in the device consisting of the ■-shaped belt pulley 62 on the driven side. .

When the torque transmission device is actuated, each belt block 1 of the drive belt 12 is continuously fed out from the V-shaped sheave 61. Then, the ■-type belt pulley 62 is engaged.

At this time, the block 1 makes a rolling motion about the inclined line 6 as the center of rotation, and rotates as shown by arrow A in FIG. Due to this rolling motion, the cylinder 10 makes four rutting motions in the vertical direction and the front-back direction against the inner circumferential surface of the endless metal band 11EL of the carrier 11. This vertical and longitudinal movement of the cylinder 10 generates local stress and frictional force on the carrier 11, but in this case, since the cylinder 11 is rotatable with respect to the pin 9, the cylinder 10
0 rotates when moving in the vertical and longitudinal directions, and does not generate large local stress or frictional force on the carrier 11.

The same process as described above occurs when the Be μ togerock 1 bites into the V-type Be/l/) wheel 31.

The speed of both V-type belt pulleys 61 and 62 is changed by changing the distance between their driving surfaces, and when the gear ratio is large, the cylinder 10 has the effect of preventing the generation of local stress and frictional force on the carrier 11. is particularly remarkable.

Now, when comparing the force exerted on the carrier 11 by the Bep Togerok in the V-shaped belt pulley 61 or 62 by this belt block 1 and by the conventional Bep A/) block 66, FIG. It comes to show. In this figure, the vertical axis Y indicates the stress P generated in the carrier 11. Also, the horizontal axis X shows the positions of the belt blocks 1 and 66, B is inside the V-type belt army 62, and C is the position of the V-type belt block 61.
Indicates the time within. The solid line is due to the Beta gel lock 1, and the dotted line is due to the belt block 66, indicating that the stress on the belt block 1 is small.

Figure $6 shows a second embodiment of the belt block.

This belt block 13 has two block bodies 1 on the left and right.
4 and 15, and as a substitute for pin 9 of block 1, both block bodies 14 and 15 are used.
are provided with round bar-shaped protrusions 14a and 15a.

The connection between both block bodies 14 and 15 is achieved by connecting the protrusion 1
Both block bodies 14 and 15 are parallel to 4a and 15EL.
This is done by driving the five-joint shaft 18 into horizontal holes 16 and 17 drilled in the upper part of the shaft. The function of the circle M1OA loosely fitted into each protrusion 13a, 14a of this belt block 12 is the same as the function of the cylinder 10 of the first embodiment.

This belt block 16 has both blocks 14°15
The force acting on the oblique sides 14b and 15b of the projection 14a
Since it is supported by the belt block 15a, it has higher rigidity than the belt block 1 of the first embodiment.

Figure 7 shows a third example of a belt block.

This belt block is the first fruit! A coil spring 19 is used instead of the cylinder 10 of the belt block 1 of the example, and the other structure is the same as the belt block 1. The coil spring 19 is loosely fitted onto the pin 10, and its action is the same as that of the cylinder 10 in the belt block 1.

In the above embodiment, a belt block that can be attached to one carrier has been described, but a belt block that can be attached to two carriers can also be provided with a cylinder in the same manner as described above. .

As described above, this invention consists of at least one carrier and a large number of belt blocks successively supported by the carrier, and is wound around a pair of V-shaped belt wheels to form both ■-shaped belts. A belt block of a drive belt for a torque transmission device that transmits torque between vehicles has an insertion hole for inserting the carrier, and is rotatably supported within this insertion hole.
However, by providing a rotating member that contacts the carrier, when the belt block is caught in the Vg belt wheel and rolled, the rotating member that is pressed against the inner peripheral surface of the carrier rotates and the carrier q that occurs between
Since the Wt force and local stress are reduced, the driving force of the drive pair A/) can be reduced to improve the belt transmission efficiency, and the fatigue limit can be improved to improve the durability.

[Brief explanation of the drawing]

1 to 4 show one embodiment of the present invention, FIG. 1 is a front view of the belt block with the lower part broken off, and FIG. 2 is the first embodiment of the belt block.
6 is a partial side view of the drive belt, FIG. 4 is an explanatory diagram of the operation of the belt block, and FIG. 5 is a sectional view taken along line I-I in the figure.
A diagram showing the stress generated and the location where it occurs corresponding to the carrier of the reto block, FIG. 6 is a front cross-sectional view of the belt block of the second embodiment, and FIG. 7 corresponds to the belt block of the sixth embodiment shown in FIG. 1. Figure 8 is a front view (however, a cross section is shown) of a conventional torque transmission device, Figure 9 is an enlarged sectional view of a part of the belt glock shown in Figure 8, and Figure 10 is an - It is an X-ray sectional view. 1.1 person...belt block 2...
Main body part 6... Cut groove 6a... Body part 4... Left side member 4a... Inclined side surface 4b
...Tilt surface 5...Right side member 5a...
Slanted side surface 5b... Slanted surface 6... Slanted line
? ...Cylinder 10, IOA...Yen
Tube 11...Carrier 12...Drive belt 13...Belt block 14...
Left block body 14a... protrusion 14
t)...Slanted side surface 15...Right block main body 15a...Protrusion 15b...Slanted side surface 19...Carp μ spring

Claims (1)

[Claims] (1) Consisting of at least one carrier and a large number of belt blocks consecutively supported by this carrier,
In a drive belt for a torque transmission device, which is wound around a pair of V-shaped belt wheels each having a drive surface with a V-shaped cross section and transmits torque between both V-shaped belt wheels, for inserting the carrier. an insertion hole bored in the block;
A belt block characterized by comprising a rotating member rotatably supported within the insertion hole and in contact with the carrier. Q) The belt block according to claim 1, wherein the rotating member is a cylinder. G) The belt block according to claim 1, wherein the rotating member is a coil spring.