JPH1026198A - Variable speed pulley - Google Patents

Abstract

PROBLEM TO BE SOLVED: To give high precision processing dimension by a sliding mechanism and to certainly absorb an restrain oscillation and vibration even when large oscillation and vibration is applied on a pulley by providing a plural number of keys and key groove spaces in the radiant direction around a core of an axis of rotation of a sleeve as their center. SOLUTION: A cylinder 16 is provided with an extension part 16f longer than a head end of a sleeve 11, a connection and disconnection operation part of a head end key 20 of the sleeve 11 is sealed by adding a sealed body 16e, and a first space of a sealed region is formed. Three of key grooves 11b, 16b provided on an external wall of the sleeve 11 and an inwall of the cylinder 16 are provided, and a key groove space formed on each of the grooves reaches the first space 40. A third space of a lubricating groove is formed by providing a spiral groove 16c and a ring groove 16d communicated to the key groove 16b on the inwall of the cylinder 16 to spray lubricating oil 30 over the whole area of sliding surfaces 11a, 16a.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable speed pulley applied to a continuously variable belt transmission, and more particularly, to a sliding mechanism for smoothly sliding two disk wheels. It relates to an improved variable speed pulley. [Prior Art] FIG. 4 (A) is a sectional view of a conventional oilless variable speed pulley. In FIG. 4 (A), 1 is a rotating shaft, 2 is an O-ring, and 3 is a key. Reference numeral 5 denotes a pull-out retaining screw which is screwed into the screw groove 4 of the rotating shaft 1. A variable speed pulley 10 is a fixed disk wheel or a fixed wheel 14 comprising a fixed disk wheel 13 press-fit into a sleeve 11 via a key 12.
, A cylinder 16 having a sliding surface 16a and a sliding disk wheel 17
And a sliding disk wheel or wheel 18 integrated with the key 2
Basically, it is composed of 0. In the sliding disk wheel 18, a bearing ring 26 is further mounted on the outer periphery of the cylinder 16 via a bearing 25, and according to the operation of a known operating device 7 (not shown) via an intervening ring 27, as shown by an arrow in FIG. Slide up and down. This type of variable speed pulley lubrication system uses a sleeve 11
The lubricating oil 30 is hermetically sealed in the oil retaining portion 11d provided in the sliding surface 1d.
Lubricating oil is supplied to 1a and 16a. On the other hand, the cylinder 16 of the sliding disk wheel 18 has a structure that is shorter than the length of the sleeve 11 and penetrates the sleeve 11. [Problems of the Prior Art] If there is a slight level of turbulence in the contact surface of a speed change belt (not shown) formed of synthetic rubber, the pulley sliding mechanism shown in FIG. )
As shown in (C) and (C), the sliding disk wheel 18 can repeat a large swing at a high speed. In particular, when the contact radius between the speed change belt and the speed change pulley is large, that is, when the belt and the pulley are in contact near the outer edge of the pulley, the force applied to the cylinder 16 is large, and the amplitude of this vibration is significantly large. Under such a situation, sufficient sealing performance cannot be expected with only the oil seal 19 and the seal ring 21, and leakage of the lubricating oil 30 is likely to occur. When the transmission horsepower is increased in the speed change belt rotating in the low speed range, a large tension is applied, and therefore, the sliding disk wheel 1 shown in FIGS.
8 tends to occur, and if such a state of high load operation continues, leakage of lubricating oil may occur in a short period of time. The basic cause of this is that, first, in order to improve the operability and slidability of the cylinder by the external speed changer 7, the distance between the sleeve 11 and the cylinder 16, which is the center of the pulley sliding mechanism, is increased. Second, the fitting tolerance is selected to be relatively loose. Second, the length of the key 20 in the sliding direction is too short, and the key itself cannot have a function of suppressing this swing. Third, the lubrication of the key and keyway mechanisms may be poor. In the key structure of this type of pulley sliding mechanism, when the sliding disk wheel 17 is to be removed from the sleeve 11, the oil seal 19 is inserted in advance. The seal 19 itself breaks down, and after the disk wheel 17 is removed, replacement maintenance of the key 20 and the like becomes possible. However, the oil seal 19 breaks every time such maintenance is performed. The assembly and disassembly work of the main body was extremely complicated. [Problems to be Solved by the Invention] The first problem of the present invention is that high precision processing can be performed on a key and a key groove structure, and as a result, high precision processing can be provided for fitting between a sleeve and a cylinder. By adopting a structure that can apply high-precision machining to the entire pulley sliding mechanism, the pulley sliding disc wheel is prevented from inadvertently swinging. And to improve durability. A second object of the present invention is to provide a more durable pulley sliding mechanism by improving the lubricity of the key and key groove portions which are the main parts of the sliding mechanism and ensuring stable sliding. providing. Further, a third object of the present invention is to provide a pulley having good workability in assembling and disassembling a variable speed pulley. [Technical Means for Solving the Problems] The variable speed pulley according to the first aspect of the present invention provides a relative distance between the respective disc wheels connected to the sleeve and the cylinder, which are slidably assembled via a key. In the variable speed pulley, which is arbitrarily adjusted, the rotating shaft is provided at one end of a key groove space formed by respective key grooves of the sleeve and the cylinder machined on a sliding surface in parallel with the axis of rotation of the sleeve. A variable speed having an opening end opened in a direction parallel to the core and having a locking member applied to one of the sleeve or the cylinder to prevent the key inserted from the opening end from falling off. Pulley.
A variable speed pulley according to a second aspect of the present invention is a variable speed pulley in which a relative distance between respective disk wheels connected to a sleeve and a cylinder respectively slidably assembled via a key is adjusted arbitrarily. An opening formed in one end of a key groove space formed by the respective key grooves of the sleeve and the cylinder formed on the sliding surface in parallel with the rotation axis of the sleeve in a direction parallel to the rotation axis. An end is formed, and a locking body is provided on one of the sleeve or the cylinder to prevent the key inserted from the opening end from falling off, and the key groove space is formed by the sleeve and the cylinder. And a variable speed pulley having a first communication passage communicating with a space in a sealing area, the volume of which is changed with the sliding of the cylinder. [Operation] In the first invention, since one end of the keyway space formed by the sleeve and the cylinder is an open end,
The finish on the side of the opening end can be performed, and particularly high-precision dimensions can be easily obtained. A key having an arbitrary length can be attached with high precision in the cylinder sliding direction. This means that a sufficiently proper sliding operation can be achieved even if the accuracy of fitting of the sliding mechanism between the sleeve and the cylinder as well as the accuracy of the key mechanism is improved, and the pulley sliding mechanism as a whole has high accuracy. It can be machined to precision dimensions and can have the function of reliably suppressing oscillation of the cylinder part during operation. Moreover, the work of assembling and disassembling the variable speed pulley itself is quickly and simplified by attaching and detaching the locking member of the key. In the second invention, the space of the sealing region surrounded by the sleeve and the cylinder is provided with the first communication path between the keyway space, and thus the sealing region can be actively used as the oil retaining space, As a result, the supply of oil to the key groove space is always assured during the operation during the rotational speed change operation, and the sliding surface between the sleeve and the cylinder can always be supplied with the oil, thereby suppressing the oscillation of the cylinder for a long time. . Embodiment 1 First Embodiment FIGS. 1A, 1B, 1C and 1D are cross-sectional views of a variable speed pulley according to an embodiment of the present invention. (A) is a cross-sectional view of the stationary vehicle and the sliding vehicle at the time of maximum approach, (B) is a cross-sectional view of the same during rotation at the maximum separation, and (C) of FIG. A cross-sectional view taken along the line C 'and a vertical cross-sectional view taken along the line DD' are shown in FIG. The same reference numerals as those in FIGS. 4A, 4B, and 4C denote the same parts, and a description thereof will not be repeated. In FIG. 1, the variable speed pulley 10 on the driving side will be described as an example, and in particular, a configuration different from the conventional example in FIG. 4 will be described. 4 is different from the conventional example of FIG. 4 in that an extension 16f is provided so that the cylinder 16 is longer than the distal end of the sleeve 11, and a sealing body 16e is added, so that the key 20 at the distal end of the sleeve 11 can be sealed and removed. To form a first space in the sealed area, and to provide key grooves 11b, 16 provided on the outer wall of the sleeve 11 and the inner wall of the cylinder 16.
b is also applied three times, that the key groove space formed by each groove, that is, the second space 15 reaches the first space 40,
Further, a spiral groove 16c and a ring groove 16d communicating with the key groove 16b are formed on the inner wall of the cylinder 16 so that the lubricating oil 30 is spread over the entire sliding surfaces 11a and 16a, thereby forming a third space of the lubricating groove. The main differences are that the seal ring 21 shown in FIG. 4 is eliminated. Moreover, in this example, three keys 20
A close contact spring key that absorbs a shock at the time of starting and has elasticity in a tangential direction about the sliding direction is used. The round key 20 of this embodiment has upper and lower ends opened, and the internal space forms an oil retaining space 31 for the lubricating oil 30, as shown in FIG. 1 (A). The upper and lower openings 32 and 33 of the key 20 and the cylindrical space 31 serve as an oil passage 31 for dispersing the lubricating oil 30 throughout the keyway by centrifugal force during rotation of the pulley.
In addition, since the interposed fluid is filled above the oil passage 31 serving as the communication passage and the oil is filled below the oil passage 31 as shown in FIG. The space 40 in the region communicates with the space outside the sealing region through the oil passage 31 and further through the communication passages 36a, 36b, and 36c. The volume fluctuation of 40 and the speed change sliding are smoothly maintained. In addition, the three groove-shaped key groove spaces 15 formed by the pair of key grooves 11b and 16b communicate with the space 40 of the sealing area via the first communication passage 15a, and oil and intervening fluid enter and exit. . Each key 20 is loaded from the side of the open end 15b of the key groove space 15, and thereafter,
Is fixed to the sleeve 11. When the key 20 is fixed to the cylinder 16, the locking body 41 is attached to the cylinder 16. In such a structure, if the sealing body 16 e is removed, and then the screw 42 of the locking body 41 is removed, not only the key 20 but also the sliding disk wheel 17 integral with the cylinder 16 can be moved in the distal direction of the sleeve 11. Can be extracted. This can be used not only for replacement of the key 20, the bearing 25, the oil seal 19 and the like but also for replacement of a belt (not shown) as compared with the conventional pulley, and the workability of maintenance, assembly, disassembly and the like can be improved. Significant improvement is meant. On the other hand, a small space 40 of the sealing area exists at the tip of the sealing body 16 e and the sleeve 11, but the volume of the expansion / contraction space 40 changes as the cylinder 16 slides. FIG. 1A shows a state of a minimum volume, and FIG. 1B shows a state of a maximum volume. The telescopic space 40 also communicates with the first passage 15a with both the cylindrical key groove 16b and the open end 15b, so that the lubricating oil 30 can flow freely. Further, the sleeve 11 has a keyway space 15 or a telescopic space 4.
0 to communicate with outside air as an example of an intervening fluid.
The communication passages 36a, 36b, 36c are provided. When the entire pulley is reversed, the communication path 36a is directly extended instead of the branch path 36b, and the keyway space 1
The oil passage 5 or the oil passage 31 may be used for the oil retaining space, or may be configured as shown in FIG. Here the central communication passage 3
6a functions as a direct communication path 36a, and the branch communication path 36b functions as a connection communication path. FIG. 1A shows a state in which the pulley 10 is stopped, while FIG. 1B shows a state in which the pulley 10 is rotating.
The oil is diffused by the centrifugal force over the entire area of the groove 16b, and then the oil enters and disperses along the spiral groove 16c and the ring groove 16d as lubricating grooves. Therefore, oil is supplied to the entire sliding surfaces 11a and 16a as the cylinder 16 rotates during the rotation. After the rotation of the pulley is stopped, the pulley stays at the bottom 40 of the sealing region of the sealing body 16e or is housed in a key groove or a key as shown in FIG. 1 (A). The lubrication grooves 16c and 16d of the present embodiment also communicate with the fourth communication passage 36b of the sleeve 11 because one end thereof communicates with the other end of the key groove space 15 formed at the open end. Therefore, when a solid key is used without using the hollow key 20 of the present embodiment, the oil passage 31 follows the tolerance or gap between the key and the key groove, but there is a restriction on the fluidity of the interposed fluid. receive. At this time, the lubrication grooves 16c, 16
Since one end of d communicates with the first space 40 of the sealing area, the d has the same function as the oil passage 31 of the key groove space 15, and the oil 30 and the intervening fluid pass through this groove. Derive. FIG. 1C shows an oil passage 31 in a keyway space of the key 20.
Shows the state in which the oil 30 is stored. Moreover, in the present embodiment, since the intervening fluid enters and exits simultaneously through the communication passages 36a, 36b, and 36c during the shifting operation, the oil 30 is stored in the oil storage space 40 in the sealed area and the oil passage in the key 20. 31 or the lubrication grooves 16c, 16
d, the intervening fluid flows freely between the communication passages 36 through the third space or further through both spaces at the same time,
The fluidity of the oil 30 is not suppressed during operation and stop. Further, since the excess oil amount in the oil storage space 40 is released from the communication passage 36 at the beginning of the installation, the remaining oil amount during rotation does not release. Second Embodiment FIG. 2 shows a variable speed pulley according to another embodiment of the present invention. In this embodiment, a sealing body 16 e formed integrally with the cylinder 16 includes an oil retaining space 40 in a sealing area,
The space outside the sealing area is communicated with a detachable communication means 39 by a second communication passage 36d. In this case, the oil storage space 40 contains the intervening fluid and the oil 30,
The air as the intervening fluid flows in and out. Therefore, the volume change that fluctuates with the sliding of the cylinder 16 is made by the fluctuation of the intervening fluid, thereby guaranteeing a smooth sliding operation. In addition, since the oil 30 is dispersed on the sliding surface during rotation, the second communication passage 36d is preferably arranged coaxially with the rotation axis. Further, in the embodiment, the key 20 is not a spring key but an example of a hollow circular pipe key, which is used as an oil passage 31 for the sliding operation. On the other hand, in this example, an example is shown in which the space 40 for sealing the lubricating oil 30 is formed by integrally forming the sealing body 16 e having a special shape and the cylinder 16, and sealed by the sleeve 11 and the cylinder 16. In this case, an example in which the sealing body 16e cooperates with the cylinder 16 is shown. However, the present invention is not limited to this.
By disposing a seal member, a bearing, or the like between the cylinder 16 and the cylinder 16, only the cylinder 16 may be slidably slidable. Further, a space 40 for enclosing the oil 30 and the intervening fluid is provided.
It is obvious to those skilled in the art that any shape may be used as long as it is a region surrounded by the member including the sleeve 11 and the cylinder 16. In this embodiment, an example in which the sealing body 16 e is a member of the cylinder 16 is shown. However, the sleeve 11 side may be used,
Basically, any shape and any volume capacity may be used as long as it is a space of a sealed area surrounded by members connected to the sleeve 11 and the cylinder 16 and whose volume changes with sliding. In addition, the leading end opening 40a of the sleeve 11 is formed large, and the length of the second communication passage 36d is adjusted, so that the oil amount can be increased or the pulley 10 can be mounted in reverse. In addition, an example is shown in which a lubrication groove of a linear groove 11e is formed as a third space 11e on the sliding surface 11a on the sleeve 11 side in the sliding direction, and the second space of the key groove space is formed via a spiral groove 16c. 15 and performs the function of introducing and removing oil and intervening fluid. The lubrication grooves are formed directly on the sliding surfaces of the sleeve 11 and the cylinder 16 by the fourth communication passages 36a, 36b, 36.
It is obvious to those skilled in the art that the linear groove 11e may be secured by forming the cross-sectional shape of the key groove space 15 into, for example, an elliptical shape. Third Embodiment FIGS. 3A and 3B show other embodiments of the present invention. In this embodiment, a lubricating oil 3 is used.
The space 40 of the sealing area for storing the
Are arranged at the front end 16f of the main body. Also in this case, the oil retaining space 40 and the key groove 16b have a structure in which oil can communicate. Incidentally, by changing the shape of the sealing body 16e in the oil retaining space 40, a measure for increasing the amount of oil is possible. Also in this example, the oil retaining space 40 expands and contracts, but communication with the external space as an intervening fluid is performed by the fourth communication passages 36a, 36b, 36c and the groove 16c on the sleeve side in FIG. 3 (A), and FIG. (B) shows an example in which a second communication passage 36d is provided on the cylinder 3 side. Since the centrifugal force acts during the rotation, the oil 30 does not leak if the tip nozzle of the communication means 39 protrudes from the oil surface. As the oil 30 is selected to have a predetermined viscosity, the oil is supplied to the sliding surface during the rotation of the pulley, and is gently stored in the oil storage space 40 again when the pulley stops. [Other Embodiments] In the above-described embodiment, the case where three cylindrical keys are provided has been described as an example. However, the structure of the key and the key groove is not limited to the example, and a single key may be used. It is needless to say that the present invention can also be applied when a rectangular key such as a rectangle is applied. Further, in the present invention, the volume of the sealing area between the sleeve and the cylinder changes with the sliding operation of the cylinder, but the spiral groove 16c as the communication passage 36 shown in FIG. A type that can be inserted along the sliding direction outside the circular key of the example may be adopted. As for the shift operation device 7, not only a manual method but also a method using an electric motor or a hydraulic device is already known. However, since such a control method is not the gist of the present invention, description thereof is omitted here. However, it is clear that the technical idea of the present invention can be applied to any system. Further, the technical ideas of the embodiments of the present invention and the like may be recombined with each other to change other embodiments, or a conventional well-known technology may be combined, but the present invention is not limited to the various embodiments described above. Various changes, alterations, or modifications are possible without departing from the scope of the present invention and can be easily created by those skilled in the art from the claims of the present application, and are included in the scope of the present invention. It is self-evident. According to the first invention, as a result of employing a structure in which one end of a keyway space formed between a sleeve and a cylinder integrally formed with a disk wheel becomes an opening end, First, by performing finishing from the opening end side, it is possible to provide extremely high-precision processing dimensions in the sliding direction. As a result, not only the dimensional accuracy of the key structure including the key and the key groove, but also Accordingly, the fitting tolerance between the sleeve and the cylinder can be further improved as compared with the related art. This means that not only the relationship between the key and the keyway space, but also the entire sliding mechanism can provide high-precision machining dimensions. As a result, even if a large swing or vibration is applied to the pulley from the load side via the belt This shows that a highly durable and highly reliable variable speed pulley capable of reliably absorbing and suppressing this is realized. Therefore, the use of the variable speed pulley according to the present invention has newly increased the industrial field, for example, which has conventionally been able to transmit power only up to about 20 hp, to a large horsepower of about 100 hp or more and a highly durable transmission having a large transmission capacity. It means that it can be expanded to a completely new applied industrial field. Moreover, secondly, since one end of the keyway space is configured to be openable, there is an advantage that the assembly and disassembly of the variable speed pulley, which conventionally required a remarkably complicated work procedure, can be performed extremely easily. The entire key and sliding disk wheel can be easily attached and detached together with the cylinder simply by attaching and detaching the sealing body and locking body for prevention. Therefore, it is possible to almost completely accomplish the replacement and maintenance of consumables such as belts, keys, oil seals, etc. at the site without bringing it to the factory, and its industrial value is extremely large. Further, according to the second invention, since the communication path is provided between the key groove space and the space of the sealing region, if this sealing region is used as an oil retaining space, the key and the key groove space can be operated. It is possible to freely and positively move and flow the oil and intervening fluid inside, and to ensure that the sliding mechanism between the sleeve and cylinder as well as the key and keyway space can always be supplied reliably and stably. Guaranteed. This means that in the first invention, in addition to the pulley sliding mechanism with high dimensional accuracy, more reliable lubrication through the lubrication passage can be ensured. There is an advantage that a variable speed pulley having a long life and high durability can be realized, and the industrial value is extremely large.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a variable speed pulley according to one embodiment of the present invention, wherein FIG. 1 (A) is a sectional view in a stopped state, FIG. 1 (B) is an operation sectional view during rotation, FIG. 2C is a cross-sectional view taken along line CC, and FIG. 2C is a cross-sectional view taken along line DD. FIG. 2 is a variable speed pulley according to another embodiment of the present invention. ) Shows a vertical cross-sectional view, and FIG. FIG. 3 is a sectional view of a variable speed pulley according to still another embodiment of the present invention. FIG. 3 (A) is a sectional view in a stopped state, and FIG. 3 (B) is a sectional view during rotation. FIG. 4 shows a conventional variable speed pulley, in which FIG. 4A is a sectional view, and FIGS. 4B and 4C are operation explanatory diagrams, respectively. In the figure, 10: variable speed pulley 11: sleeve 11a: sliding surface 11b: keyway
11c ... lubrication groove (linear groove) or third space 14 ...
Fixed disk wheel 15 ... keyway space or second space 15
a: first communication path 15b: open end 16: cylinder 1
6a: sliding surface 16b: key groove 16c: lubricating groove (helix groove) or third space 16d: lubricating groove (ring groove) or third space 16e: sealing body 18: sliding disk wheel
20 key 30 lubricating oil 31 oil passage 36 communication passage 36a communication passage or third communication passage 36a, 36
b, 36c: fourth communication passage 36d: second communication passage 39
Communication means 40: space in sealed area or first space 4
0g: communication passage or fourth space 41: locking body

Claims (1)

Claims: (1) A variable speed pulley in which a relative distance between respective disk wheels connected to a sleeve and a cylinder respectively slidably assembled via a key is arbitrarily adjusted. An opening end formed in one end of a key groove space formed by the respective key grooves of the sleeve and the cylinder formed on the sliding surface in parallel with the rotation axis of the sleeve in a direction parallel to the rotation axis. A variable speed pulley having a locking member provided on one of the sleeve or the cylinder for preventing the key inserted from the opening end from falling off. (2) The variable speed pulley according to claim 1, wherein a plurality of the keys and the keyway spaces are provided in a radial direction about a rotation axis of the sleeve. (3) The variable speed pulley according to claim 1 or 2, wherein the key and the keyway space have a rectangular cross section perpendicular to the rotation axis. (4) The variable speed pulley according to claim 1 or 2, wherein the key and the keyway space have a substantially circular cross section in a direction perpendicular to the rotation axis. (5) The key or keyway space has a length in the direction of the axis of the rotating shaft at least equal to or greater than the sliding distance of the cylinder. Variable speed pulley according to the item. (6) The variable speed pulley according to claim 5, wherein the key and the key groove space have an oil passage or a lubrication groove formed in parallel with the rotation axis. (7) The variable speed according to claim 6, wherein the key has elasticity to bend in a tangential direction of the sleeve and the cylinder sliding surface about a parallel line parallel to the rotation axis. Pulley. (8) In a variable speed pulley in which the relative distance between each of the disk wheels connected to each of the sleeve and the cylinder slidably assembled via a key can be adjusted arbitrarily, An opening end opened in a direction parallel to the rotation axis is formed at one end of a key groove space formed by the respective key grooves of the sleeve and the cylinder machined on the sliding surface in parallel with the opening. A locking member is provided on one of the sleeve or the cylinder to prevent the key inserted from the hole end from dropping off, and the key groove space is
A variable speed pulley having a first communication passage which is sealed by the sleeve and the cylinder and which communicates with a space in a sealed area whose volume changes as the cylinder slides. (9) The space in the sealed region is formed by communicating with the space outside the sealed region to change the volume of the space in the sealed region and smoothly slide the cylinder. The variable speed pulley according to claim 8. (10) The variable speed pulley according to claim 9, wherein the space in the sealed region communicates with a space outside the sealed region via a second communication passage provided in the cylinder. (11) The variable speed pulley according to claim 9, wherein the space in the sealing region is communicated with a space outside the sealing region via a third communication passage provided in the sleeve. (12) The variable speed pulley according to claim 8 or 9, wherein the key or the keyway space has an oil passage formed in a direction parallel to the rotation axis. (13) The keyway space is the fourth groove formed on the sleeve.
13. The variable speed pulley according to claim 12, wherein the variable speed pulley is communicated with a space outside the sealing region via a communication passage. (14) The space of the sealing area is the sleeve or / and / or
The lubrication groove provided on the sliding surface of the cylinder and one end thereof is communicated with one end, and the other end is communicated with the key groove space or the fourth communication passage. Variable speed pulley. (15) The space in the sealed area is connected to the outside of the sealed area through the first, second, third or fourth communication passage. The variable speed pulley according to any one of claims 8 to 14. (16) The variable speed pulley according to claim 15, wherein the intervening fluid in the space of the sealing region is formed by introducing and introducing air. (17) The variable speed pulley according to claim 16, wherein the space of the sealing area is filled with oil at the same time.