JPS5810034Y2 - Continuously variable speed pulley - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a continuously variable speed pulley.

As shown in FIG. 1, the conventional continuously variable speed pulley has the base portions 3 of the V-belt receivers 2 on both sides fitted into the outer surface of the sleeve 1 so as to be able to move forward and backward, and the bolts attached to both end surfaces of the sleeve 1. 4, each of the engaging bodies 5 is fixed, and the cam-shaped engaging blade parts 7 of the V-belt receiver bodies 2 on both sides are respectively engaged with the cam-shaped engaging blade parts 6 at a plurality of locations on the engaging bodies 5 on both sides. , and insert the guide pin 8 protruding from the base 3 of the V-belt I/car body 2 on the negative side into the guide hole 9 of the base 3 of the V-belt car body 2 on the other side.
Some V-belt receiver bodies 2 on both sides are fitted to each other so as to move forward and backward, thereby preventing relative deviation in the rotational direction between the V-belt receiver bodies 2 on both sides.

Note that 16 is a rotation axis. In this conventional continuously variable speed pulley, by adjusting the tension of the V-belt A wound between the V-belt receiver bodies 2 on both sides, the interval between the receiver bodies 2 is expanded against the coil spring 11. Otherwise, the V-belt A is narrowed by the restoring force of the coil spring 11, and as a result, the V-belt A bites into the inside of the V-belt receiver body 2 and the winding diameter becomes smaller, or it is pushed outward and the winding diameter becomes larger. However, when the distance between the receiving bodies 2 on both sides changes, the base part 3 slides against the sleeve 1, so in order to prevent the sliding part 12 from wearing out, the sleeve The lubricating oil in the oil storage part 13 in the inner cavity of the sleeve 1 is supplied to the sliding part 12 through the through hole 14 in the sleeve 1.

However, in this conventional structure, when the lubricating oil supplied to the sliding part 12 oozes out due to wear of the sliding part 12, the oil is fitted into the engaging blade parts 6 and 7 due to centrifugal force or the like. There was a waste of water leaking to the outside of the cover 15.

In addition, the cam-shaped engagement blade portions 6 and 7 are prone to local wear, and the large backlash between them causes a large amount of wear, resulting in poor durability.

Furthermore, since the oil storage portion 13 is provided, this makes it difficult to assemble and disassemble this pulley.

In addition, in the case where the engaging blade parts 6 and 7 do not restrict the movement directions of each other, changes in the load on the V-belt A and the opening/closing that the V-belt receiving body 2 receives from the V-belt A every one rotation. All of the repeated loads are applied to the sliding part 12, and since this sliding part 2 is located far inward from the acting part of the V-belt A, the base 3 in this sliding part 12 rotates one rotation with respect to the rotating shaft 16. As a result, the sliding portion 12 was subject to severe wear and had poor durability.

Further, in order to increase the durability of the sliding portion 12, it is good to make the base portion 3 long, but if it is made too long, the entire pulley will become large, which is not preferable.

The present invention attempts to improve these points, and aims to provide a continuously variable speed pulley that increases the durability of the sliding parts without increasing the size, and that can effectively utilize lubricant. .

An embodiment of the present invention will be described based on FIG.

The base portions 23 of the V-belt receiver bodies 220 on both sides are fitted onto the outer peripheral surface of the sleeve 21 so as to be slidable in the axial direction.
A side body 25 is fixed to both ends with bolts 24.

The outer peripheral portions 26 of the side bodies 25 on both sides are bent inward, and an external gear 27 serving as one fitting portion is integrally formed on the outer peripheral surface of the distal end of the outer peripheral portion 26.

In addition, the base 23 is attached to the outer surface of the V-belt receiver body 22 on both sides.
A concentric cylindrical portion 29 is integrally fixed with a bolt 31.

An internal gear 28 is formed on the inner circumferential surface of the cylindrical portion 29 as the other fitting portion that is slidably fitted to the external gear 27 only in the axial direction.

In order to fix the side bodies 25 on both sides, compression coil springs 32 are installed on the outer peripheral surfaces of the bases 23 on both sides, and the outer ends of the springs 32 are attached to the side bodies 25 and the inner The ends are fitted into the side recesses 33 of the V-belt receiver body 22, and the springs 32 urge the V-belt receiver bodies 22 on both sides inward.

Further, an axial lubricant supply hole 34 is bored and provided in the sleeve 21, and the lubricant is supplied from the supply hole 34 in the radial direction toward the sliding portion 35 between the base 23 and the sleeve 21 on both sides. The hole 36 is left open, and a grease nipple 38 screwed into the screw hole 37 of the left side body 25 is inserted into the supply hole 34.
from this nipple 38 to the supply hole 34.36.
The sliding portion 35 is lubricated with a lubricant such as Chris supplied through the lubricant.

In addition, a screw-shaped lubricating groove 39 is formed on the inner circumferential surface of the base 23 in the sliding portion 35. The lubricant oozing outward is scattered onto the inner surface of the outer circumferential portions 2 and 6 of the side body 25 due to rotational centrifugal force, and is further spread over the gear 2.
It is supplied to the meshing part of the gears 27 and 28, where it is stably held, and lubricates and cools the gears 27 and 28.

At that time, the tip of the cylindrical part 29 and the outer peripheral part 2 of the side body 25
An 01J ring 42 as a vinyl member fitted to the tip □ of the cylindrical part 29 is interposed between the outer circumferential surface of the gear 27 and the outer peripheral surface of the cylindrical part 29. Prevents the agent from leaking to the outside.

Note that 43 is a screw hole for assembling, disassembling, and extracting the assembly 12, and its usage will be explained later.

Further, 44 is a rotating shaft fitted inside the sleeve 21;
46 is a fixing key, 46 is a fixing screw, and 47 is a C-shaped retaining ring.

The entire pulley is assembled in the following order: sleeve 21, belt receiver body 22, spring 32, side body 25, and cylindrical part 29. When fixing the side body 25 to the end surface of the sleeve 21, The rod member is attached to the left side body 2.
5 through the screw hole 43 of the sleeve 21, and pull it out to the outside of the right side body 25. The body 25 is pressed against both end surfaces of the sleeve 21 against the repulsive force of the compression coil spring 32.

In addition, for disassembly, use the above-mentioned rod member and holding plate, etc.
This is done gradually while suppressing the two-moment expansion of the compression coil spring 32 caused by the removal of the bolt 24.

The entire boob can be removed from the rotating shaft 44 by screwing a bolt tool into the screw hole 43, forcibly screwing the tool in, and pressing the left end surface of the rotating shaft 44 with its tip.

Next, the operation of this embodiment will be explained.

When this boob is used, for example, on the driven side, the V-belt receiver bodies 22 on both sides are rotated by the rotational force applied from the V-belt A, and this rotational force is applied through the meshing parts of the gears 28 and 27. It is transmitted to the side bodies 2.5 on both sides, and is taken out from a rotating shaft 44 fitted to the side bodies 25 via a key 45.

When the tension of the V-belt A increases, the receiver bodies 2 on both sides
2 are separated against the biasing force of the compression coil spring 32, and the V-belt A bites inward, and the winding diameter thereof becomes substantially smaller, so that the rotational speed of the rotating shaft 440 changes greatly.

Conversely, when the tension of the V-belt A decreases, the rotational speed of the rotating shaft 44 decreases and changes.

During such adjustment of the rotational speed, the internal gear 28 of the cylindrical portion 29 rotates integrally with the external gear 27 at a fixed position while sliding only in the axial direction.

Since the rotational force is transmitted through the meshing of the gears 27 and 28 and the relative displacement is performed only in the axial direction, it is larger than that using the conventional cam-shaped engagement blades 6 and 7. It has excellent durability with no backlash or local wear.

In particular, if the inner external gear 27 is made of a metal that is relatively softer than the outer internal gear 28, the risk of partial uneven wear of the internal gear 28 can be completely eliminated.

Furthermore, since the gears 27 and 28 mesh at a position approximately equal to the working portion of the V-belt A, this gear 27.
Clutch action and sliding action are performed at the meshing part of 28,
The fluctuations in the load on the V-belt A and the repeated opening and closing loads that the V-belt receiving body 22 receives from the V-belt-A every rotation are firmly supported by the meshing portion of the gears 27 and 28, so that the V-belt A The acting force does not act on the sliding portion 35 between the sleeve 21 and the base 23 as a prying force, and therefore the degree of wear on the sliding portion 35 can be reduced. It has also become possible to form a shorter length, and it has also become possible to downsize the entire boob.

Further, a meshing part of the gears 27 and 28 is provided radially outward of the sliding part 35 to which lubricant is supplied, and the meshing part is sealed by a 01J ring 42 provided at the outer end of the cylindrical part 29. Therefore, the cylindrical portion 29 has a function as a grease spot, and the lubricant that oozes from the sliding portion 35 and scatters onto the meshing portion due to rotational centrifugal force is retained on the inner surface of the cylindrical portion 29, and the lubricant is retained in the meshing portion. Keep parts lubricated and cooled.

In this way, the lubricant is effectively utilized in the inner and outer circumferences.

In addition, since the hollow part of the sleeve 21 is only used as a fitting part for the rotating shaft 44, and since a screw hole 43 is provided, a tool can be inserted into this hollow part and the screw hole 43 to assemble it.
Easy to disassemble.

Further, the pulley attached to the rotating shaft 44 can be removed very easily by screwing a screw tool into the screw hole 43.

This ease of assembly, disassembly, and removal also makes it easy to replace parts, and it is superior in terms of management and maintenance compared to conventional pulleys of this type.

In addition, by utilizing the meshing of the gears 27 and 28, the relative misalignment between the V-belt receivers 22 on both sides is eliminated, so there is no need to provide guide pins 8 or covers 15 of conventional products, and parts Assembly can be made easier by reducing the number of points.

In the above embodiment, one of the fitting parts is the external gear 27.
, and an internal gear 28 as the other fitting part, but the same effect can be obtained by using a spline fitting structure instead of fitting these gears 27 and 28, so this spline The structure can also be a mating part on one side and the other side.

Further, in the above embodiment, the cylindrical portion 29 is connected to the outer peripheral portion 2 of the side body 25.
However, the structure is not limited to this, for example, the outer peripheral part 26 is fitted on the outside of the cylindrical part 29, an external gear is formed on the outer surface of the cylindrical part 29, and the outer periphery is The present invention also includes a structure in which an internal gear is formed on the inner surface of the portion 26, and an 01J ring that faces the cylindrical portion 29 is fitted to the tip of the outer peripheral portion 26.

As described above, according to the present invention, one fitting part on the sleeve side and the other fitting part on the V-belt receiving body side are slidably fitted only in the axial direction, and the V-belt is inserted into the fitting part at the fitting part. The acting force of the V-belt receiver is firmly supported, thereby preventing prying forces from acting on the sliding part between the base of the V-belt receiver body and the sleeve, which improves durability against wear at the fitting part. Also, the durability against abrasion at the base of the V-belt receiver body can be effectively increased without increasing the size.

Furthermore, since the one and other fitting portions are sealed with the sealing member, the lubricant for lubricating the sliding portion between the sleeve and the base is securely retained in the one and the other fitting portions, and the fitting portion is sealed. The fitting portions can be lubricated, and the lubricant can be used effectively and wear of one fitting portion and the other fitting portion can be prevented.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional continuously variable speed pulley, and FIG. 2 is a sectional view showing an embodiment of the continuously variable speed pulley of the present invention. 21...Sleeve, 22...V-belt receiver body, 23...Base, 25...Side body, 26...Outer periphery, 27... External gear as one fitting part, 28... Internal gear as the other fitting part, 29... Cylindrical part, 32...
...Compression coil spring, 34, 36...Lubricant supply hole, 35...Sliding part, 42...
01J ring as a seal member, 44...Rotating shaft.

Claims (1)

[Scope of utility model registration request] Side bodies are fixed to both ends of the sleeve into which the rotating shaft is fitted, one fitting part is integrally provided on the outer periphery of both side bodies, and the bases of the V-belt receivers on both sides are attached to the outer periphery of the sleeve. are fitted so as to be slidable in the axial direction, and a cylindrical part concentric with the base part is integrally provided on the outside of the V-belt receiving body on both sides, and a cylindrical part concentric with the base part is provided in the cylindrical part only in the axial direction. A compression coil spring is installed between the side bodies on both sides and the V-belt receiving body on both sides, and the sliding portion between the sleeve and the base is integrally provided. A lubricant supply hole is opened in the moving part, and a sealing member is interposed between the cylindrical part of the V-belt receiver body and the outer peripheral part of the side body to seal the fitting part of the one and the other. Features a continuously variable speed pulley.