JPH06300091A - Chain belt - Google Patents

Abstract

PURPOSE: To provide a chain belt in which abrasion and power loss of a pin and a position regulating member can be restrained. CONSTITUTION: In one chain of a pair of endless annular chains 40, 42, a second circular arc pin 48 positioned on the end side of a link plate 36 of a pair of a first circular arc pin 46 and a second circular arc pin 48 fitted in pin fitting holes 50, 52 of a link plate 36 opposite to the other chain is extended to the other chain side more than the first circular arc pin 46. By mutual abutment or abutment to the second circular arc pin 48, a position regulating member 37 for inhibiting the relative movement in the longitudinal direction of the paired chains 40, 42 is secured to the tip of the second circular arc pin 48.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a chain belt wound between V pulleys for transmitting power.

[0002]

2. Description of the Related Art A type of endless annular chain belt wound between V pulleys for transmitting power is connected to a pair of first and second pins which are mutually rollable at their rear surfaces. A pair of endless annular chains including a pin and a plurality of link plates that are connected in the longitudinal direction in a state where a plurality of the connecting pins are stacked in the thickness direction by fitting the connecting pins in fitting holes provided at both ends. But,
It is known that belt blocks are arranged in a state of being displaced from each other by a half pitch and have belt blocks each having a size corresponding to the width dimension of the parallel state on the inner peripheral side. For example, the one described in Japanese Utility Model Publication No. 63-136747 is an example. In such a chain belt, in one chain, the connecting pins, that is, the tips of a pair of pins forming the rocker pin are projected toward the other chain side in the width direction of the chain belt, and the pair of pins is formed. An annular position regulating member is fitted to the tip end portion, and the relative position of the first chain and the second chain in the longitudinal direction is regulated by the contact between the position regulating member and the connecting pin of the other chain. It has become.

[0003]

However, in the chain belt of the above-mentioned type, since the position regulating member is adapted to be fitted with a pair of pins constituting the connecting pin, the chain belt is not bent. When the pair of pins relatively rolls on their outer peripheral surfaces in association with each other, relative slippage occurs between the pin and the position restricting member, promoting wear of the pin and the position restricting member and driving There was a drawback that the loss was large.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a chain belt in which wear and power loss of pins and position regulating members are suitably suppressed. .

[0005]

The gist of the present invention for achieving such an object is to provide a connecting pin composed of a pair of first and second pins which are mutually rollable on their back surfaces. By including the connecting pins fitted in the fitting holes provided at both ends, a plurality of link plates are connected in the longitudinal direction in a state where a plurality of sheets are stacked in the thickness direction, and a predetermined fitting hole is provided. A pair of endless annular chains in which one of the fitted first pin and second pin located on the end side of the link plate is non-rotatably fitted to the link plate is a half pitch. One of the pair of endless annular chains in a chain belt that is arranged in parallel in a shifted state and has a large number of belt blocks each having a size corresponding to the width dimension of the parallel state on the inner peripheral side. In the chain, one of the pair of the first pin and the second pin fitted in the fitting hole of the link plate facing the other chain is located closer to the end of the link plate than the other pin. Also extends to the other chain side, and a position regulating member for preventing relative movement in the longitudinal direction of the pair of endless annular chains by abutting each other or abutting the extended pins is provided. This is because they are fixed to the tips of the extended pins.

[0006]

In such a chain belt, one of the pair of endless annular chains, one of the pair of first and second pins fitted into the fitting hole of the link plate facing the other chain One of the pins located on the end side of the link plate is extended to the other chain side of the other pin rather than the other pin, and the pair of pins is contacted with each other or with the extended pin. A position regulating member for preventing relative movement of the endless annular chain in the longitudinal direction is fixedly provided at the tip of each extended pin.

[0007]

As described above, in the chain belt of the present invention, since the position restricting member is fixed to only the extended pin of the connecting pins, a pair of the position regulating members is rotated along with the bending of the chain belt. When the pins relatively roll on their outer peripheral surfaces, relative slippage between the pin and the position regulating member is prevented, and wear and drive loss of the link plate functioning as the pin and the position regulating member are prevented. It is preferably suppressed.

Further, the position restricting member can also function as a retaining member for the first pin by being disposed on both sides of the first chain and the second chain in the width direction, respectively. Therefore, a member dedicated to preventing the first pin from coming off is unnecessary, the number of parts is reduced, and the chain belt is lightened.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 2 shows a belt type continuously variable transmission 12 for a vehicle in which the chain belt 10 according to one embodiment of the present invention is used. In the figure, the belt type continuously variable transmission 12 is
Input shaft 14 and output shaft 16 arranged parallel to each other
And a pair of primary side variable pulleys 18 having variable effective diameters attached to the input shaft 14 and the output shaft 16, respectively.
And the secondary variable pulley 20 and the variable pulley 1
A chain belt 10 wound between 8 and 20 is provided, and power is transmitted via the chain belt 10. The primary side variable pulley 18 and the secondary side variable pulley 20 are connected to the input shaft 14 and the output shaft 16 respectively.
Fixed to the primary side fixed rotary body 22 and the secondary side fixed rotary body 24 respectively, and the input shaft 14 and the output shaft 16 are attached to the primary side fixed rotary body 22 so as to be movable in the axial direction and non-rotatable around the axis. And the primary side movable rotary body 2 that forms an annular V groove between the secondary side fixed rotary body 24 and the secondary side fixed rotary body 24.
6 and a secondary side movable rotary body 28.
The primary side movable rotary body 26 and the secondary side movable rotary body 2
Thrust is given to each of the primary side hydraulic actuator 30 and the secondary side hydraulic actuator 32, and the gear ratio of the belt type continuously variable transmission 12 is changed by the unbalance of the thrusts by a shift control valve (not shown). Can be changed continuously.

The chain belt 10 has, for example, as shown in FIGS. 1, 3 and 4, five link plates 36 arranged in parallel with each other, and one end portion thereof interposed between each of the five link plates 36. The four link plates 36, which are parallel to each other, are connected by the rocker pin 38 to form an endless ring, and the first chain 40 and the second chain 42 are shifted in parallel with each other by about a half pitch, and those. The first chain 40 and the second chain 42 are arranged at a predetermined interval in parallel with the width direction of the first chain 40 and the second chain 42.
2 and a large number of belt blocks 44 that are alternately mounted on the inner peripheral side of the second chain 2, and the power is transmitted between the belt blocks 44 and the first chain 40 and the second chain 42.

1 and 3 show a state in which the belt blocks 44 are connected in an annular shape along a straight line, and FIG. 4 shows the belt blocks 44 in the V groove of the variable pulley 18 or the variable pulley 20. It shows a state in which they are connected in an annular shape along the inner wall surface. The chain double-dashed line C in FIGS. 1 and 3 indicates the center line of the chain belt 10. Further, in FIG. 3, the alternate long and short dash line indicates the inner wall surface of the V groove, and the rocker pin 38 of the second chain 42 is entirely shown in its cross section.

As shown in FIG. 5, the rocker pin 38 is composed of a pair of first arc-shaped pins 46 each having an arc-shaped cross section and a second arc-shaped pin 48 longer than the first arc-shaped pins 46. The back surface of the link plate 36 is fitted into pin fitting holes 50 and 52, which will be described later, in a state of being in contact with each other. First chain 40 and second chain 4
In one of the first and second arc-shaped chains, one of the first arc-shaped pin 46 and the second arc-shaped pin 48 fitted into the pin fitting holes 50 and 52 of the link plate 36 facing the other chain The second arc-shaped pin 48 located on the end side extends toward the other chain side than the first arc-shaped pin 46. The length of the first arc-shaped pin 46 is substantially the same as the total plate thickness of the nine link plates 36, and the length of the second arc-shaped pin 48 is the total plate thickness of the nine link plates 36. It is longer than the specified size. The predetermined size is the second arcuate pin 48 in the assembled state of the first chain 40 and the second chain 42.
Both of the tip ends are set so as to project from the link plates 36 located on both sides in the chain width direction by the plate thickness of the position regulating member 37.

As shown in FIG. 6, the link plate 36 is in the form of a long plate and has a pair of substantially circular pin fitting holes 50 formed on both end sides for receiving the rocker pins 38. 52, and a pair of gripping protrusions 54, 55 protruding from the end face located in the longitudinal middle portion between the pin fitting holes 50, 52 toward the inner peripheral side of the chain belt 10 at a predetermined distance from each other. . Of the first arcuate pin 46 and the second arcuate pin 48 of the link plate 36 of the inner peripheral edge of the pin fitting holes 50 and 52, which is located on the longitudinal end side of the link plate 36. The link plate 36 that engages with the inside of the one located on the end side
Convex rotation stoppers 56 and 57 that prevent relative rotation with
Are provided respectively. As a result, the first arc-shaped pin 46 and the second arc-shaped pin 48 are
Along with the turning of 0, they are relatively rolled on their outer peripheral surfaces. An engagement recess 58 for receiving the belt block 44 is formed between the pair of grip projections 54, 55 so that the pair of contact portions 59, 60 shown by black circles can be brought into contact with the outer peripheral side edge portion of the belt block 44. It has become.

The position restricting members 37 prevent relative movement of the first chain 40 and the second chain 42 in the longitudinal direction by contacting each other or by contacting the second arcuate pins 48. As shown in FIG. 7, a pin-fitting hole 61 is formed in the shape of a long plate for fitting the tip of the second arc-shaped pin 48 in the longitudinal direction.
Is equipped with. The pin fitting hole 61 has an arc shape, and one end edge side of the position regulating member 37 is opened. The dimension W of the position regulating member 37 in the longitudinal direction of the chains 40 and 42 is determined by the assembled state of the chain belt 10, that is, the tip end portions of the second arc-shaped pins 48 of the first chain 40 and the second chain 42 in the pin fitting holes 61. In the state where the first chain 40 and the second chain 42 are fitted together, the mutual spacing between the position regulating member 37 or the second arc-shaped pin 48 of the other chain adjacent in the longitudinal direction becomes substantially zero, and the first chain 40 and the second chain 42 are mutually The size is set to be shifted by about one half pitch.

The bottom of the engaging recess 58 of the link plate 36 is formed so as to be located on the inner peripheral side by a certain distance from the inner peripheral side edge located on the outer side of the engaging recess 58, As shown in FIG. 3, when the belt blocks 44 are arranged along a straight line in the assembled state of the chain belt 10, the inner portion of the link plate 36 constituting one of the first chain 40 and the second chain 42 is A space Δh is provided between the peripheral edge and the top of the belt block 44 attached to one of the chains 40 or 42. This interval Δh is such that the first chain 40 and the second chain 42 perform relative vertical movement in a state of being fed into the V groove of the primary side variable pulley 18 or the secondary side variable pulley 20 and in a state of being fed out of the V groove. Even if the link plate 36 and the belt block 44 are not brought into contact with each other even if they are,
The pitch of the chain 40 and the second chain 42 is 8 mm,
When the hanging radius of the chain belt 10 is 30 mm,
The value is about 0.3mm.

The belt block 44 is made up of two types, a first belt block 44a and a second belt block 44b. As shown in detail in FIGS. 8 and 9, the first belt block 44a has a shape of an elongated plate having the same height dimension in the longitudinal direction, and the variable pulleys 18 and 2 are provided.
A pair of friction taper surfaces 6 frictionally engaged with the inner wall surface of the V groove 0
2, 64 are provided on the end surface of the belt block 44a in the width direction. A pair of facing surfaces 66 facing the belt blocks 44a and 44b on both sides of the belt block 44a,
The friction taper surfaces 62 and 64 are formed with a pair of engagement grooves 70 and 72, both ends of which are open, along the outer peripheral side edge of the belt block 44a. The engagement grooves 70, 72 are a pair of stopper portions 74 provided on the friction taper surface 62 side of the center line C of the engagement grooves 70, 72,
The friction taper surface 62 of the stopper portions 74, 76
It is divided into first engaging groove portions 78a and 80a extending toward the side and second engaging groove portions 78b and 80b extending toward the friction taper surface 64 side of the stopper portions 74 and 76, respectively.

The first engaging groove portions 78a and 80a have a length dimension which is longer than the total thickness of the five link plates 36 by a predetermined dimension. In addition, the second engaging groove portions 78b, 80b
Is provided with a length dimension between the stopper portions 74 and 76 and the center line C, which is longer than the total thickness of the three link plates 36 by a predetermined dimension. The stopper portions 74 and 76 are located near a predetermined straight line which is close to the end edges of the engaging grooves 70 and 72 and are substantially parallel to the center line C, and the stopper portions 74 and 76 are respectively caulked at two positions indicated by X in FIG. It is formed by filling a part of 70 and 72. As a result, the link plate 3
6 and the belt block 44a are prevented from moving relative to each other in the width direction, and the first chain 40 and the second chain 42 are restricted from approaching each other beyond a certain limit.

The second belt block 44b, as shown in detail in FIGS. 10 and 11, has first engaging groove portions 82a, 82a.
The length dimension of 4a is a predetermined dimension longer than the total thickness of the four link plates 36, and the second engaging groove portions 82b, 84 are also provided.
The first belt block 44 is only that the length dimension between the end portions on the stopper portions 74, 76 side and the center line C in b is longer than the total thickness of the four link plates 36 by a predetermined dimension.
different from a. The same parts as those of the other first belt blocks 44a are designated by the same reference numerals as those of the first belt blocks 44a, and the description thereof will be omitted.

The outer peripheral edge of the chain belt 10 of the belt blocks 44a and 44b has an arcuate cross section, whereby the grip projection 5 of the link plate 36 is formed.
Even if the width dimension of 4, 55 is increased, the gripping protrusions 54, 55
The back surfaces 86 and 88 located on both outer sides of the first chain 4 are
0 and the other link plate 36 of the second chain 42
Since it is prevented from interfering with the belt block 44 attached to the gripping protrusions 54, 55
The strength of can be sufficiently secured.

When assembling the chain belt 10,
First, a large number of first belt blocks 44a and second belt blocks 44b are alternately arranged in parallel at a predetermined interval so that the first engaging groove portions 78a, 80a and 84a, 82a face each other. Then, two link plates 3 are respectively provided in the first engaging groove portions 78a, 80a and 82a, 84a.
6 are alternately arranged from the side of the friction taper surface 62 such that one ends of the friction gripping surfaces 6 are alternately inserted.
The distal end of 5 is fitted into the stopper portions 74 and 76 while moving to the side thereof, and the second engaging groove portions 78b, 80b and 8
The grip projections 5 of the three link plates 36 and the two grip projections 5 of the two link plates 36 are alternately arranged in 2b and 84b from the friction taper surface 64 side.
The front ends of 4, 55 are fitted into the stopper parts 74, 76 while moving them, and the rocker pins 38 are fitted in the pin fitting holes 50, 52 of the nine link plates 36, so that the group of link plates 36 is formed. Connect in sequence.

Next, the position regulating members 37 are respectively fitted into the second arcuate pins 48 projecting to the outer sides of the one group of link plates 36, and both end surfaces of the second arcuate pins 48 are marked with x.
The first chain 40 and the second chain 42 are respectively assembled by crimping at the position marked with (FIG. 4) and crimping it. As a result, the belt blocks 44a and 44b have the friction taper surface 62 of the center line C.
On the side, the outer peripheral side edge portions thereof are attached to the inner peripheral side of the first chain 40 or the second chain 42 so as not to fall off while being held by the four and five pairs of the gripping protrusions 54 and 55, respectively.

In this way, the first chain 40 in which a large number of the first belt blocks 44a and the second belt blocks 44b are alternately mounted and the belt blocks 44a and 44b of the first chain 40 are separated from each other. The second chains 42 to which the belt blocks 44a and 44b are alternately mounted are arranged so that the mutual belt blocks 44 are alternately positioned in parallel, and the first chains 40 and the second chains 42
When the tip ends of the second arc-shaped pins 48 are overlapped with each other in the longitudinal direction, the first chain 40 and the second chain 42 are juxtaposed so that the mutual distance in the longitudinal direction becomes substantially zero. The chain belts 10 shown in FIGS. 1, 3 and 4 are assembled by being combined with each other while being shifted by a half pitch.

The chain belt 1 constructed as described above
At 0, the position regulating member 37 is fixed to only the second arc-shaped pin 48 of the rocker pins 38,
When the rocker pin 38 rolls relative to each other on their outer peripheral surfaces as the chain belt 10 turns, relative slippage between the rocker pin 38 and the position regulating member 37 is prevented, and the rocker pin 38 is prevented. Pin 38 and position regulating member 3
Wear and drive loss of No. 7 are preferably suppressed.

Further, in this embodiment, the position regulating member 37
Are provided on both sides in the width direction of the first chain 40 and the second chain 42, respectively, and thus also function as a retaining member for the first arc-shaped pin 46. For this reason, a member dedicated to preventing the first arcuate pin 46 from coming off is unnecessary, the number of parts is reduced, and the chain belt 1
Weight is reduced to 0.

Further, according to the present embodiment, the belt block 44 has the first belt in which the engaging grooves 78, 80 and 82, 84 having the length corresponding to the number of the gripping projections 54, 55 to be gripped are formed. Block 44a and second belt block 44
Chain belt 1 because it is composed of 2 types
The belt for the first chain 40 or the second chain 42 is aligned by aligning the engaging grooves 78, 80 or 82, 84 with the gripping protrusions 54, 55 of the first chain 40 and the second chain 42 when assembling 0. There is an advantage that the block 44 is reliably positioned in the circumferential direction and the width direction of the chain belt 10.

Further, according to the present embodiment, the chain can be obtained by simply combining the first chain 40 having a large number of belt blocks 44 and the second chain 42 having a large number of different belt blocks 44 with each other. Since the belt 10 is assembled, there is an advantage that the assembling work of the chain belt 10 can be easily performed.

Although one embodiment of the present invention has been described above with reference to the drawings, the present invention can be applied to other modes.

For example, in the above-described embodiment, the position restricting member 37 is provided on both sides of the first chain 40 and the second chain 42 in the width direction in order to function also as a retaining member for the first arcuate pin 46. However, in one of the first chain 40 and the second chain 42, it may be arranged only on the other chain side.

Further, in the above-described embodiment, the second arcuate pin 48 is crimped to the position regulating member 37 by crimping both end faces thereof, but both ends thereof are inside the pin fitting hole 61. It may be pressed into.

In addition, the present invention can be variously modified without departing from the spirit thereof.

[Brief description of drawings]

1 is a plan view of a part of the chain belt of FIG. 2 corresponding to a cross-sectional view taken along line I-I of FIG. 3 showing a state in which the chain belt is connected along a straight line.

FIG. 2 is a diagram for explaining the configuration of a belt type continuously variable transmission including a chain belt that is an embodiment of the present invention.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a front view of the chain belt of FIG. 2, showing a part of it in an enlarged manner.

5 is a perspective view showing the rocker pin of FIG. 1. FIG.

6 is a front view showing the link plate of FIG. 1. FIG.

7 is a front view showing the position regulating member of FIG. 1. FIG.

FIG. 8 is a front view of the first belt block of FIG.

9 is a side view of the first belt block of FIG. 8. FIG.

10 is a front view of the second belt block of FIG. 1. FIG.

11 is a side view of the second belt block of FIG.

[Explanation of symbols]

10: Chain belt 18: Primary side variable pulley, 20: Secondary side variable pulley ...
-(V pulley) 36: Link plate 37: Position regulating member 38: Rocker pin ... (Connecting pin) 40: First chain 42: Second chain 44: Belt block 46: First arc-shaped pin ... ( 1st pin) 48: 2nd arcuate pin ... (2nd pin; extended pin) 50, 52: Pin fitting hole ... (fitting hole)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeru Okuwaki 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Co., Ltd. (72) Inventor Yukio Tomimura 1300-50 Irokuno, Hachiman, Nabari City, Mie Borg Warner・ Inside Automotive Co., Ltd.

Claims (1)

[Claims] 1. A connecting pin comprising a pair of a first pin and a second pin which are mutually rollable on their rear surfaces, and the connecting pin is fitted into fitting holes provided at both ends, A plurality of link plates connected in the longitudinal direction in a state where a plurality of sheets are stacked in the thickness direction, of the first pin and the second pin fitted into a predetermined fitting hole,
A pair of endless annular chains, one of which is located on the end side of the link plate and which is non-rotatably fitted to the link plate, are juxtaposed in a state of being displaced from each other by a half pitch and the width of the juxtaposed state In a chain belt having a large number of belt blocks each having a size corresponding to the dimension on the inner peripheral side, the one end of the pair of endless annular chains is fitted into the fitting hole of the link plate facing the other end of the chain. A pair of the first pin and the second pin
One of the pins located on the end side of the link plate is extended to the chain side of the other side of the other pin,
Further, position regulating members for preventing relative movement in the longitudinal direction of the pair of endless annular chains by abutting each other or by abutting the extended pins are respectively fixed to the tip ends of the extended pins. A chain belt characterized by being installed.