JPH0549849B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field] The present invention relates to an endless transmission belt in which blocks are attached to a chain consisting of links and pins.

(Prior Art) FIG. 1 is a sectional view of a conventional endless belt for power transmission.

Conventionally, torque can be transmitted by stretching an endless transmission belt between a pair of pulleys having contact surfaces in the form of two conical surfaces facing each other coaxially. The endless transmission belt is constructed by connecting or connecting a large number of trapezoidal blocks 10 with an endless chain consisting of links 100 and pins 103. Contact surfaces 20 are formed on part or all of both side edges.

The block 10 has a trapezoidal front shape in the direction of binding, with the inclined contact surfaces 20 formed on part or all of the left and right edges, and both inclined contact surfaces 20 have a predetermined shape in the left and right width directions. A through hole or a notch 40 having a certain size and opening at the outer peripheral edge or a through hole serving as a cavity for link insertion is bored in the thickness direction, which is the direction in which at least one block 10 is connected.

When the blocks 10 are connected together by an endless chain, a pin 103 connects each connecting band or link piece 102 that makes up the chain.
The main part is cylindrical. A circumferential groove having a center axis that intersects the left and right inclined contact surfaces 20 at the same angle is formed on both the front and back surfaces of the block 10 at approximately the center of the link insertion cavity. The main part of the pin 103 is disposed inside, and the block 10 is connected to the pin 103 so as to be held therebetween.

The torque transmitted to the block 10 by the pulley on the driving side is transmitted via the endless chain connecting the blocks 10, thereby increasing the transmission capacity of the endless chain itself and improving durability. (Refer to Japanese Patent Application Laid-Open No. 58-21043).

(Problem to be Solved by the Invention) However, in the endless belt for power transmission having the above configuration, caulking holes are attached to both ends of all the pins 103.
Since the pin 103 is enlarged by forming pins 04 and 105 to prevent the pin 103 from coming off, productivity is low and costs are high.

Moreover, in order to perform caulking, pin 10 is required.
Since it is necessary to keep the hardness of the parts forming the caulking 104 and 105 of No. 3 low, the durability of the pin 103 is reduced.

Furthermore, after caulking process, caulking 10
Since a portion with a gradually changing cross-sectional radius is formed on the inner side of the pin 103, contact with the groove surface of the block 10, which is formed with a uniform radius, is poor, uneven wear occurs at both ends, and the pin 103 is damaged. Durability will decrease.

The present invention solves the problems of the conventional endless belt for power transmission, can easily prevent pins from coming off, has excellent productivity, and can increase the hardness of the entire pin. An object of the present invention is to provide an endless belt for power transmission that can suppress occurrence of uneven wear and improve durability.

(Means for Solving the Problems) For this purpose, the endless belt for power transmission of the present invention includes a chain in which links are connected endlessly, which are pivotally connected by pins, and a chain that is sandwiched between each pin of the chain. In the endless belt for power transmission, the blocks are made up of at least one assembly and finishing block and other blocks.

The assembly finishing block has a through pin groove formed on two connecting surfaces, and the other blocks have a cap pin groove having a bank for locking both ends of the pin on one of the connecting surfaces. A pin groove is formed on the other side of the connecting surface. Further, both blocks have a link insertion cavity formed to intersect with the bag pin groove and the through pin groove and penetrate in the connecting direction.

The link has pin holes at both ends corresponding to the cap pin groove and the through pin groove, and is disposed in the link insertion cavity.

The pins are composed of two rolling contact pins arranged so that their outer peripheral curved surfaces abut each other, and the pins corresponding to the blocks for finishing the assembly are fitted with a member to prevent pins from falling out during finishing the assembly. The pins corresponding to the other blocks are prevented from coming off by the bank of the bag pin groove.

[Operations and Effects of the Invention] According to the present invention, as described above, a chain in which links pivotally connected by pins are endlessly connected;
In the endless belt for power transmission, the blocks are sandwiched between each pin of the chain and are connected together, and the blocks are made up of at least one block for assembly and finishing and other blocks.

The assembly finishing block has a through pin groove formed on two connecting surfaces, and the other blocks have a cap pin groove having a bank for locking both ends of the pin on one of the connecting surfaces. A pin groove is formed on the other side of the connecting surface. Further, both blocks have a link insertion cavity formed to intersect with the bag pin groove and the through pin groove and penetrate in the connecting direction.

The link has pin holes at both ends corresponding to the cap pin groove and the through pin groove, and is disposed in the link insertion cavity.

Therefore, when assembling the endless transmission belt, the links are connected by inserting pins into the pin holes of the stacked links along the through-pin grooves. Next, the block is arranged so that the pin is surrounded by the cap pin groove, and the pin is inserted into the pin hole of the stacked link again along the through pin groove.

The pins are composed of two rolling contact pins arranged so that their outer peripheral curved surfaces abut each other, and the pins corresponding to the blocks for finishing the assembly are fitted with a member to prevent pins from falling out during finishing the assembly. The pins corresponding to the other blocks are prevented from coming off by means of banks in the bag pin grooves.

Therefore, the work of attaching the pins becomes extremely easy, the blocks can be assembled quickly, and the endless belt for power transmission can be manufactured at low cost.

In addition, the outer diameter of the pin can be made uniform and the entire pin can be hardened to the same hardness, which improves contact with the pin groove and link and suppresses uneven wear. can be used to improve durability.

Since the pin is made up of two rolling contact pins arranged so that their outer circumferential curved surfaces are in contact with each other, there is no sliding friction between the pin and the link, and the durability of the pin and link is improved.

(Embodiment) Next, the endless transmission belt of the present invention will be explained based on a first embodiment shown in FIGS. 2 to 9.

In this embodiment, the endless transmission belt 1 of the present invention has pin holes 4 and 5 at both ends, and a link L formed by stacking a large number of link pieces 3 into three such that the pin holes 4 or 5 match. , and 2 arranged so that the outer peripheral curved surfaces that pivotally connect these links L are in contact with each other.
It consists of an endlessly connected chain 2 consisting of real rolling contact pins P, and a metal block B which is locked between each rolling contact pin P of the chain 2 and is made of synthetic resin, ceramic or the like.

As shown in FIG. 3, in the cross-sectional shape of the endless belt for transmission, block B extends from the upper edge 16 of the belt to the lower edge 17 so that both edges 15a and 15b are in contact with the conical contact surface 6 of the pulley of the continuously variable transmission. It has a trapezoidal shape with an inclined contact surface 15 whose width decreases in the direction, and the plate shape has a thickness of about 1/4 to 1/20 of its maximum width. In the vertical cross-sectional shape of the endless belt, one continuous surface 13A
A horizontal bag pin groove 11 is provided with banks 11A and 11B on both sides, and the other connecting surface 13B has a bag pin groove 11 extending over the entire width in the width direction corresponding to the bag pin groove 11. Horizontal through pin groove 12
is provided, intersecting the bag pin groove 11 and the through pin groove 12 to form a link insertion cavity 14 in the continuous stitching direction.
(in this embodiment, a rectangular hole) is provided.

The link L has pin holes 4 and 5 at both ends, and is made up of a large number of thin metal link pieces 3 arranged in parallel in the thickness direction. This link L has both ends 21
A, 21B are fitted into the link insertion cavity 14, and the pin chamber 21 formed by the bag pin groove 11 and the through pin groove 12 of the adjacent block B and the pin hole 4 or 5 of the link piece 3 One pin hole 4 or the other pin hole 5 of each link piece 3 of each link piece 3 of the link L arranged in three overlapping positions so as to match each other and arranged in parallel in the thickness direction is connected to a pin P having an outer circumferential curved surface at least in the main part. An endless belt-like chain 2 is formed by being pivotally connected by. Said link piece 3
The amplitude of the link insertion cavity 14 of the block B is
A number of link pieces 3, each having a length slightly shorter than the distance between the upper and lower edges 16, 17 and having a pin P fitted into one pin hole 4, are inserted into the link insertion cavity 14 of the block B, and the link L 1 between pins P of
Connect blocks B one by one. The distance between the pin holes 4 and 5 of each link piece 3 is
When inserted, each pin P comes into contact with the bag pin groove 11 and the through pin groove 12 of the block B and clamps the block B, or at least the pin grooves 11 and 12
The length should be such that it does not engage with the block B and prevent it from falling off.

The pin P has a length in the thickness direction and an outer diameter corresponding to the pin chamber 21 formed by the bag pin groove 11 of the block B and the through pin groove 12 of the adjacent block B. As shown in Figures 8 and 9, blocks B having adjacent bag pin grooves 11 and through pin grooves 12 are linked together with each link piece 3 to form an endless belt, and each link piece 3 is plate-shaped and has its own shape. A pin hole 4 is formed on one side and a pin hole 5 is formed on the other side, and two rolling contact pins P are fitted into the pin holes 4 and 5. The rolling contact pin P is two rolling contact pins P having a D-shaped cross section (Fig. 8) or a rolling contact pin having a C-shaped cross section arranged so that the outer peripheral curved surfaces are in contact with each other.
P' (Fig. 9) (the upper part of the illustration is for the belt straight section, the lower part of the illustration is for the belt curved part) is inserted, and the consecutively bound blocks B are connected with each other so that they can be bent by the link pieces 3, thereby creating an endless belt. is formed.

FIG. 7 shows the groove shape of the block B of the rolling contact pin P. D-shaped rolling contact pin P
If it is curved, it has an escape cavity. The radial load from block B to pin P is received at point a after contact. The circumferential load from block B to pin P is received at b. (Fig. 8, upper diagram) The radial load from block B to pin P is received at contact line d.
The circumferential load from block B to pin P is the contact line c,
Receive it at e. (Figure 8 lower figure, Figure 9 upper figure) In addition, by using two rolling contact pins arranged so that the outer peripheral curved surface is in contact with the pin, sliding friction between the pin and link is eliminated, increasing the durability of the pin and link. You can improve.

Next, the blocks B are connected to the chain 2 formed by the links L and pins P described above.

The assembly of the endless belt of this embodiment will be explained.

They are arranged in three layers alternately so as to match one pin hole 4 or the other pin hole 5 of the link piece 3, and a large number of them are arranged in parallel in the thickness direction of the link L.

(a) One pin hole 41a of the first node link piece 31a of the first layer and the first node link piece 33a of the third layer
and the other pin hole 53a of the first pin P1.
, and fit the first block B1 into the first link piece 31a of the first layer with the cap pin groove 11 clear.

(b) Next, align the other pin hole 52a of the first joint link piece 32a of the second layer with one pin hole 43a of the first joint link piece 33a of the third layer, and pivot with the second pin P2. Arriving, the first section link piece 3 of the third layer
3a, the second block B2 is fitted in the same direction as the first block B1.

(c) Next, align the other pin hole 51b of the second joint link piece 31b of the first layer with one pin hole 42a of the first joint link piece 32a of the second layer, and pivot with the third pin P3. Attach the first link piece 3 of the second layer
2a, a third block B3 is fitted in the same direction as the second block B2.

Thereafter, this process is repeated one after another, and (c) after installing the final link piece 32n of the second layer, the through pin groove 12 is replaced with the bag pin groove 11.
The final block Bn, which is a block for assembly and finishing in which the number n is formed, is fitted into the final joint link piece 32n of the second layer, and the other pin hole 51a of the first joint link piece 31a of the first layer is inserted into the final joint link piece 32n. 2
One pin hole 4 of the last node link piece 32n of the layer
1n is pivotally connected to the final pin Pn. The final pin Pn is prevented from coming off by attaching a pin-off prevention member.

Note that the first pin P1, second pin P2, etc. corresponding to the other blocks, that is, the first block B1, the second block B2, etc., are connected to the bag pin groove 11.
This is prevented by the banks 11A and 11B.

As the pin removal prevention member, a snap ring 32 can be used as shown in FIG. 5, and in that case, at least one snap ring 32 is attached to the end of the final pin Pn.

Further, as the pin removal prevention member, a pin removal prevention cover 33 as shown in FIG. 6 can also be used. In this case, the pin removal prevention cover 33
is the final block Bn and the final node link piece 32n
It is attached so as to cover the end of the final pin Pn that is fitted into the terminal.

Furthermore, the pin slipout prevention cover 33 may be press-fitted into the positioning recess 14C of the pin P.
It may be welded to In addition, the pin removal prevention cover 3
3 may be fixed to block B with a screw, and pin P
It may be fixed to Furthermore, in this embodiment, the pin Pn positioning recess 14C (first,
8 and 9) at both ends, the pin P positioning recess 14C may be provided on only one side (for example, one end is bag-shaped and the other pin Pn positioning recess 14C has a means for preventing the pin from coming off), and one end is It may also be one with a stopping means. (For example, the pin slipout prevention cover 33 is provided on one side of the pin Pn, and the other side is left open.) In this endless transmission belt, the driving force transmitted from the block B to the block B held between the pulleys on the input side is transferred to the endless belt. The force is transmitted to the link L as a tension, and this force is transmitted to the output pulley.
In this embodiment, the distance between the pins can be kept small, so noise can be reduced.

10 and 11 show a second embodiment of the invention.

In this embodiment, the pin holes 4 on one side of the link piece 3 and the pin holes 5 or escape pin holes 6 on the other side are arranged in three layers alternately, and a large number of pin holes are arranged in parallel in the thickness direction of the link L.

The assembly of the endless belt of this embodiment will be explained.

(a) One pin hole 41a of the first joint link piece 31a of the first layer and the first joint link piece 32a of the second layer
The relief pin hole 62a and the other pin hole 53a of the first joint link piece 33a of the third layer are aligned, and the first joint link piece 31a of the first layer is pivotally connected to the first joint link piece 31a of the first layer. Insert block B1 into bag pin groove 11.
It fits easily.

(b) Next, the other pin hole 51b of the second joint link piece 31b of the first layer, one pin hole 42a of the first joint link piece 32a of the second layer, and the first joint link of the third layer. Align the relief pin hole 63a of the piece 33a and pivotally connect it with the second pin P2, and
The second block B2 is fitted into the joint link piece 32a in the same direction as the first block B1.

(c) Next, check the escape pin hole 61b of the second joint link piece 31b of the first layer and the second joint link piece 3 of the second layer.
2b and one pin hole 43a of the first node link piece 33a of the third layer, and are pivotally connected by a third pin P3, and the first link piece 33a of the third layer
Fit the third block B3 into the joint link piece 33a in the same direction as the second block B2.

Thereafter, this process is repeated one after another, and (d) after installing the final link piece 32n of the third layer, the through pin groove 12 is replaced with the bag pin groove 11.
The final block Bn, which is a block for assembly and finishing in which n is formed, is fitted into the final joint link piece 33n of the third layer, and the escape pin hole 61a of the first joint link piece 31a of the first layer is inserted into the second joint link piece 33n. The other pin hole 52a of the first joint link 32n of the layer and one pin hole 43n of the final joint link piece 33n of the third layer are pivotally connected by the final pin Pn. Further, the final pin Pn is prevented from coming off by attaching a pin falling-off prevention member to both ends or one end.

Note that the first pin P1, second pin P2, etc. corresponding to the other blocks, that is, the first block B1, the second block B2, etc., are connected to the bag pin groove 11.
This is prevented by the embankment.

In this endless belt for transmission, the link pieces of the links have increased elasticity, so that the contact between the pins and the link pieces becomes uniform.

12 and 13 show a third embodiment.

In this embodiment, a large number of these pins are arranged in parallel in the thickness direction of the link L, and are arranged so as to alternately overlap with one pin hole 4, the other pin hole 5, or the relief pin hole 6 of the link piece 3.

The assembly of the endless belt of this embodiment will be explained.

(a) The other pin hole 51a of the first link piece 31a of the first layer and the first link piece 33a of the third layer
The one pin hole 43a of the fourth layer and the relief pin hole 64a of the first joint link piece 34a of the fourth layer are aligned and pivoted by the first pin P1, and the first joint link piece 33a of the third layer is connected to the first joint link piece 33a of the third layer. Insert block B1 into bag pin groove 11.
It fits easily.

(b) Next, check the relief pin hole 61a of the first link piece 31a of the first layer and the first link piece 3 of the second layer.
The other pin hole 52a of the second link piece 2a and one pin hole 44a of the first joint link piece 34a of the fourth layer are aligned and pivotally connected by the second pin P2, and the first
The second block B2 is fitted into the joint link piece 34a in the same direction as the first block B1.

(c) Next, one pin hole 41a of the first joint link piece 31a of the first layer, the relief pin hole 62a of the first joint link piece 32a of the second layer, and the second joint link piece of the third layer. 33b and the other pin hole 53b, and are pivotally connected with the third pin P3, and the first
Fit the third block B3 into the joint link piece 31a in the same direction as the second block B2.

(d) Next, one pin hole 42a of the first joint link piece 32a of the second layer, the escape pin hole 63b of the second joint link piece 33b of the third layer, and the second joint link piece of the fourth layer. 34b and the other pin hole 54b, and are pivotally connected with the fourth pin P4, and the first
A fourth block (not shown) is fitted into the joint link piece 34a in the same direction as the third block B3.

Thereafter, this process is repeated one after another (e) After installing the final link piece 32n of the second layer, the block for assembly finishing is formed with a through pin groove (not shown) in place of the bag pin groove 11. The final block Bn as shown in FIG. pin hole 63
a and the other pin hole (not shown) of the first node link piece 34a of the fourth layer are pivotally connected by a final pin (not shown). The final pin is prevented from coming off by attaching a pin-off prevention member to both ends or one end.

Note that the first pin P1, second pin P2, . . . corresponding to the other blocks, ie, the first block B1, the second block B2, .

In this embodiment, the distance between the pins is reduced, so noise is reduced. Furthermore, since the elasticity of the link pieces of the link increases, the contact between the pin and the link pieces becomes uniform.

FIG. 14 shows a fourth embodiment.

Block B is made of plate material with almost uniform thickness.
In its front shape, it has left and right inclined contact surfaces 15 that come into contact with the contact surface 6 of the pulley, and a part of the center of the upper edge 16 is cut out to form a link insertion cavity 14.
The link L is formed in the cutout portion 78.
, and a pin P is formed in the center.

FIG. 15 shows a fifth embodiment.

Block B shown in FIG. 15 forms left and right inclined contact surfaces 15, and a part of the center of the lower edge 17 of the plate material is cut out to form a link insertion cavity 14.
The link L is provided in the cutout portion 88, and a pin P is formed in the center.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional endless transmission belt, FIG. 2 is a side view of a first embodiment of an endless transmission belt according to the present invention, and FIG. 3 is a first embodiment of an endless transmission belt according to the present invention. 4 is a sectional view of the first embodiment of the endless belt for power transmission according to the present invention, and FIG. 5 is a sectional view of the final block of the first embodiment of the endless belt for power transmission according to the present invention. , FIG. 6 is a sectional view of the final block of the first embodiment of the endless belt for power transmission according to the present invention, FIG. 7 is a block diagram of the first embodiment of the endless belt for power transmission according to the present invention, and FIG.
The figure is an operation diagram of a rolling contact pin with a D-shaped cross section in the first embodiment of the endless belt for power transmission according to the present invention, and FIG. 9 is the rolling contact pin with a C-shaped cross section in the first embodiment of the endless belt for power transmission according to the present invention 10 is a sectional view of the second embodiment of the endless transmission belt according to the present invention, FIG. 11 is a sectional view of the second embodiment of the endless transmission belt according to the present invention, and FIG. 12 is a sectional view of the second embodiment of the endless transmission belt according to the present invention. A cross-sectional view of a third embodiment of the endless belt for power transmission according to the present invention, FIG. 13 is a cross-sectional view of the third embodiment of the endless belt for power transmission according to the present invention, and FIG. 14 is an endless belt for power transmission according to the present invention. A sectional view of the fourth embodiment, the first
FIG. 5 is a sectional view of a fifth embodiment of the endless belt for power transmission according to the present invention. In the diagram: 1... Endless transmission belt 2... Chain, 3... Link piece 4... Pin hole 5... Pin hole, B... Block L... Link P, P1,
P2, P3...Pn...Pin.

Claims (1)

[Scope of Claims] 1. An endless belt for power transmission comprising a chain in which links are connected to each other by pins, and blocks held and connected between each pin of the chain, wherein the blocks are , consisting of at least one assembly finishing block and other blocks, the said assembly finishing block has a through pin groove formed in two connecting surfaces, and the other blocks lock both ends of the pin. A bag pin groove having a bank is formed on one of the connecting surfaces, and a through pin is formed on the other side of the connecting surface, and both blocks are formed to intersect with the bag pin groove and the through pin groove and penetrate in the connecting direction. The link has a link insertion cavity, and the link has pin holes corresponding to the bag pin groove and the through pin groove at both ends, and is disposed in the link insertion cavity, and the link has a pin hole at both ends corresponding to the bag pin groove and the through pin groove, and is arranged in the link insertion cavity. consists of two rolling contact pins arranged so that their outer peripheral curved surfaces are in contact with each other, and the pins corresponding to the blocks for assembly and finishing can be prevented from falling out by installing a pin fall-out prevention member during assembly and finishing. The endless belt for power transmission is characterized in that the pins corresponding to the other blocks are prevented from coming off by the banks of the bag pin grooves. 2. The endless transmission belt according to claim 1, wherein the pin removal prevention member is caulked at a portion of the block corresponding to the end of the pin. 3. The endless power transmission belt according to claim 1, wherein the pin removal prevention member is a snap spring attached to an end of the pin. 4. The endless belt for power transmission according to claim 1, wherein the pin removal prevention member is a cover that is fitted into a block and locks an end of the pin. 5. The endless belt for power transmission according to claim 1, wherein the rolling contact pin has a C-shaped cross section. 6. The endless transmission belt according to claim 1, wherein the rolling contact pin has a D-shaped cross section. 7. The endless belt for power transmission according to claim 1, wherein the link is composed of a large number of link pieces made of thin metal plates that are stacked and arranged in parallel in the thickness direction. 8. The endless belt for power transmission according to claim 7, wherein the link piece has a pin clearance hole between one pin hole and the other pin hole, which is larger than both pin holes.