JP2012522954A - Belt type continuously variable transmission - Google Patents

Abstract

The present invention relates to a belt-type continuously variable transmission, and more specifically, a variable drive pulley that changes a diameter and controls a transmission ratio, and a variable drive pulley that is connected by a belt and operates opposite to the variable drive pulley. This is a belt type continuously variable transmission consisting of a variable driven pulley that changes the diameter and adjusts the belt tension, and the variable drive pulley and the variable driven pulley are between a pair of pulley plates coupled to the pulley shaft. A plurality of belt support bases each having a ratchet gear for locking the belt are inserted and installed in a radially movable manner. A belt locking latch formed on the inner peripheral surface of the belt support base of the variable drive pulley and the variable driven pulley is provided with a transmission plate for moving the belt support base in the radial direction. By forming the ratchet gear portion that meshes with the gear portion, the diameters of the variable drive pulley and the variable driven pulley can be changed easily and smoothly. In addition to making it possible to perform step shifting, it prevents slipping between the pulley and the belt even when a large load is applied, thereby realizing more efficient power transmission. is there.
[Selection] Figure 2

Description

  The present invention relates to a belt-type continuously variable transmission, and more specifically, a variable drive pulley that changes a diameter to control a transmission ratio, and an operation that is coupled to the variable drive pulley by a belt and is opposite to the variable drive pulley. It is a belt type continuously variable transmission consisting of a variable driven pulley that changes the diameter and adjusts the belt tension, and the variable drive pulley and the variable driven pulley are belts between a pair of pulley plates coupled to the pulley shaft. A plurality of belt support bases, each having a locking ratchet gear portion, are inserted and installed so as to be movable in the radial direction. The belt is formed by installing a transmission plate that moves the belt support base in the radial direction, and the belt is formed on the inner peripheral surface of the belt support base of the variable drive pulley and the variable driven pulley. By forming the ratchet gears that mesh with the stopping ratchet gears, the diameters of the variable drive pulley and the variable driven pulley can be changed more easily and smoothly. In addition to making it possible to achieve an efficient continuously variable transmission, it is possible to realize more efficient power transmission by preventing a slip phenomenon between the pulley and the belt even when a large load is applied. It is what I did.

In general, a continuously variable transmission (CVT) is a gear that continuously shifts between a maximum transmission ratio and a minimum transmission ratio according to a given transmission pattern, thereby maximizing the driving force generated by the engine. It refers to a device that can be used efficiently and can realize excellent power performance and improved fuel efficiency.

  Such continuously variable transmissions are widely used not only in automobiles but also in various industrial fields such as industrial machines, hoists, conveyors for article transfer, winches, elevators and escalators. Most conventional continuously variable transmissions have a complicated structure and are frequently damaged during use. In particular, a continuously variable transmission without a gear shift stage is a continuously variable transmission. The speed change range is extremely limited by the speed change, and the application to various uses is not satisfactory.

  In a conventional continuously variable transmission, a V-belt type continuously variable transmission 100 as shown in FIG. 1 is widely used. This V-belt type continuously variable transmission 100 drives an output generated by an engine together with a drive side fixed pulley plate 102 fixedly installed on the outer peripheral edge of a drive shaft 101 that receives direct transmission, and a drive side fixed pulley plate 102. A drive hydraulic chamber 105 is formed by a drive side movable pulley plate 103 that is axially movable on the outer periphery of the drive shaft 101 so as to form a side V-shaped groove 104, and a back surface of the drive side movable pulley plate 103. A variable drive pulley 107 constituted by a drive side hydraulic cylinder 106, a driven side fixed pulley plate 109 fixedly installed on the outer peripheral edge of a driven shaft 108 arranged at a predetermined remote position in parallel with the drive shaft 101, and a driven side A driven-side movable pulley plate 110 installed on the outer peripheral edge of the driven shaft 108 so as to be movable in the axial direction so as to form a driven-side V-shaped groove 111 together with the fixed pulley plate 109, and a driven-side movable A variable driven pulley 114 composed of a driven hydraulic cylinder 113 forming a drive hydraulic chamber 112 on the rear surface of the roller plate 110, a drive side V-shaped groove 104 of the variable drive pulley 107, and a driven side V-shaped of the variable driven pulley 114. A V-belt 115 is provided so as to be placed between the groove 111.

  The conventional V-belt type continuously variable transmission configured as described above is movable on the drive side by applying a constant hydraulic pressure to the drive hydraulic chamber 105 of the drive side hydraulic cylinder 106 through a flow path formed inside the drive shaft 101. The pulley plate 103 is moved in the axial direction to narrow the width of the drive-side V-shaped groove 104 of the variable drive pulley 107, and the drive hydraulic chamber 112 of the driven-side hydraulic cylinder 113 passes through the flow path formed inside the driven shaft 108. Applying a certain hydraulic pressure, the driven movable pulley plate 110 is moved in the axial direction to widen the width of the driven V-shaped groove 111 of the variable driven pulley 114, or vice versa. The width of the groove 104 is increased, and the width of the driven side V-shaped groove 111 of the variable driven pulley 114 is decreased to reduce the width of the V-belt 115 applied to the variable drive pulley 107 and the variable driven pulley 114. And so as to form a gear ratio by changing a radius touching.

  However, the conventional V-belt type continuously variable transmission configured as described above is large because the V-belt 115 applied to the variable drive pulley 107 and the variable driven pulley 114 is in contact with the pulley in a frictional manner. When a load is applied, a slip phenomenon occurs between the variable drive pulley 107 and the variable driven pulley 114 and the V-belt 115, and not only the power transmission is not smoothly performed, but also the V-belt 115 is caused by such a slip phenomenon. There was also a problem that the durability of the resin significantly decreased. Further, there is a problem that the tension of the V-belt 115 is weakened by repeated use, and efficient power transmission cannot be performed.

  The present invention is for solving the above-mentioned problems, and is connected by a variable drive pulley that controls the transmission ratio by changing the diameter, a variable drive pulley, and a belt, and the diameter is changed by an operation opposite to the variable drive pulley. In the belt-type continuously variable transmission comprising a variable driven pulley that adjusts the belt tension, the variable drive pulley and the variable driven pulley are a ratchet gear portion for locking the belt between a pair of pulley plates coupled to the pulley shaft. A plurality of belt support bases formed with a plurality of belt support bases are inserted and installed so as to be movable in the radial direction. On the outer surface of each pulley plate, the plurality of belt support bases are rotated in the opposite directions by a transmission plate rotating device. The belt is engaged with a belt locking ratchet gear portion formed on the belt support base of the variable drive pulley and the variable driven pulley on the inner peripheral surface. Since the ratchet gears are formed mutually, the diameters of the variable drive pulley and the variable driven pulley can be changed easily and smoothly. It is a technical problem to realize a more efficient power transmission by enabling a gear shift and preventing a slip phenomenon between a pulley and a belt even when a large load is applied. And

  In order to achieve the above technical problem, the present invention relates to a variable drive pulley, a variable drive pulley, and a belt, which control the transmission ratio by changing the diameter. In a belt-type continuously variable transmission comprising a variable driven pulley for adjusting tension, a variable drive pulley includes a pulley shaft having a pulley plate coupling portion formed at the center of the outer peripheral surface, and both ends of the pulley plate coupling portion of the pulley shaft. A pulley shaft insertion hole is formed in the central portion by being coupled to each other, and a plurality of slide grooves are radially formed around the pulley shaft insertion hole, and a radial direction between the pulley plates The ratchet gear portion for locking the belt is formed on the outer surface by being movably inserted and installed on the outer surface of the pulley plate, the slide portion inserted into the slide groove of the pulley plate at both ends, and the outer surface of the pulley plate A plurality of belt support bases each having a protruding guide protrusion and a pulley plate coupled to both ends of the pulley plate coupling portion of the pulley shaft are rotatably installed via thrust bearings, respectively. Thus, a plurality of pulley shaft insertion holes are formed in the central portion, and a plurality of guide protrusions of a plurality of belt support bases inserted between pulley plates are inserted around the pulley shaft insertion holes. A pair of transmission plates each having an involute curve groove formed radially, and a plurality of transmission plates rotatably installed on the outer surface of the pulley plate are rotated in opposite directions, and a plurality of insertion plates installed between the pulley plates are installed. Consists of a transmission plate rotation device that moves the belt support in the radial direction, and the variable driven pulley has the same structure as the variable drive pulley, but is variable The belt locking ratchet gear portion provided on the outer surface of the belt support base of the moving pulley is formed opposite to the inclination direction of the belt locking ratchet gear portion formed on the belt support base of the variable drive pulley. The belt is formed on the inner peripheral surface of the belt support base of the variable driven pulley and the drive side ratchet gear portion meshed with the belt locking ratchet gear portion formed on the belt support base of the variable drive pulley. The driven-side ratchet gear portion meshing with the ratchet gear portion is formed so as to be mutually formed.

  Further, the present invention is such that the transmission plate rotating device is coupled and installed at the center of the outer surface of the transmission plate. A through-hole through which the pulley shaft passes is formed on the front and rear surfaces, and the partition that divides the oil chamber into two spaces is fixedly installed on both sides of the inside of the housing in which the oil chamber is formed. In the oil chamber divided into two spaces by the partition wall, a rotor which is coupled to the outer peripheral surface of the pulley shaft inserted so as to penetrate the housing and rotates together with the pulley shaft is inserted and installed. A pair of hydraulic actuators formed by projecting and forming a vane that divides an oil chamber divided into two spaces by partition walls into four spaces on both sides of the outer peripheral surface of the rotor, and a transmission plate are respectively installed. In order to apply hydraulic pressure to the hydraulic actuators, a plurality of openings formed through the rotors inserted into the housings of the hydraulic actuators. A hydraulic passage that is formed inside the pulley shaft so as to communicate with the oil inlet / outlet hole, and a pulley shaft that is rotatable to one side of the outer peripheral surface so as to communicate with a hydraulic passage formed inside the pulley shaft It is characterized in that it is configured with an oil oil access port that is to be inserted and installed.

  As described above, the belt type continuously variable transmission according to the present invention is connected by a variable drive pulley, a variable drive pulley, and a belt that control the transmission ratio by changing the diameter, and the diameter is changed by operation opposite to the variable drive pulley. A variable driven pulley that adjusts the tension of the belt. The variable drive pulley and the variable driven pulley are a plurality of belts in which a ratchet gear portion for locking a belt is formed between a pair of pulley plates coupled to a pulley shaft. A speed change mechanism in which a support base is inserted so as to be movable in the radial direction, and a plurality of belt support bases are moved in the radial direction while rotating in opposite directions by a speed change plate rotating device on the outer surface of each pulley plate. A plate is installed, and the belt is engaged with a belt locking ratchet gear portion formed on a belt support base of a variable driving pulley and a variable driven pulley on an inner peripheral surface. By forming the ratchet gears to be formed mutually, the diameter of the pulley can be changed more easily and smoothly by using the transmission plates that are rotated in opposite directions by the transmission plate rotating device. As a result, it is possible not only to achieve more accurate and efficient continuously variable transmission, but also to prevent a slip phenomenon between the pulley and the belt when a large load is applied. This has the effect of realizing efficient power transmission.

It is explanatory drawing which shows the conventional V-belt type continuously variable transmission. 1 is a perspective view showing a belt type continuously variable transmission according to the present invention. It is a perspective view which shows the belt used for the belt-type continuously variable transmission by this invention. It is a disassembled perspective view which shows the structure of the variable drive pulley and variable driven pulley of the belt-type continuously variable transmission by this invention. It is a disassembled perspective view which shows the structure of the hydraulic actuator used for the variable drive pulley and variable driven pulley of the belt-type continuously variable transmission by this invention. It is sectional drawing which shows the assembly state of the variable drive pulley of the belt-type continuously variable transmission by this invention, and a variable driven pulley, and a hydraulic pressure supply line. It is explanatory drawing which shows the operation | movement process of the belt-type continuously variable transmission by this invention. It is explanatory drawing which shows the operation | movement process of the belt-type continuously variable transmission by this invention.

  Hereinafter, the present invention for achieving the above object will be described in detail with reference to FIGS.

  FIG. 2 is a perspective view showing a belt type continuously variable transmission according to the present invention, FIG. 3 is a perspective view showing a belt used in the belt type continuously variable transmission according to the present invention, and FIG. FIG. 5 is an exploded perspective view showing configurations of a variable drive pulley and a variable driven pulley of a belt type continuously variable transmission according to FIG. 5, and FIG. 5 is a hydraulic pressure used for the variable drive pulley and variable driven pulley of the belt type continuously variable transmission according to the present invention. FIG. 6 is an exploded perspective view showing the structure of the actuator, and FIG. 6 is a sectional view showing the assembled state of the variable drive pulley and variable driven pulley and the hydraulic pressure supply line of the belt type continuously variable transmission according to the present invention. These are explanatory drawings which show the operation | movement process of the belt-type continuously variable transmission by this invention.

  As shown in FIG. 2, the belt type continuously variable transmission according to the present invention is connected by a variable drive pulley 10 that changes the diameter to control the transmission ratio, and the variable drive pulley 10 and the belt 50. The variable driven pulley 30 is configured to adjust the tension of the belt 50 by changing the diameter by the operation opposite to that of the belt 50.

  Since the variable drive pulley 10 and the variable driven pulley 30 have the same structure except for a part of the configuration, the same configuration is described with the same reference numeral, and different configurations are different. It will be described separately with the symbol.

  As shown in FIG. 4, the variable drive pulley 10 includes a pulley shaft 11 having a pulley plate coupling portion 11 a formed at the central portion of the outer peripheral surface. At this time, the pulley plate coupling portion 11a formed at the central portion of the outer peripheral surface of the pulley shaft 11 is preferably formed integrally with the pulley shaft 11, but the pulley plate coupling portion 11a is separately provided for convenience of manufacture. It is also possible to assemble the pulley shaft 11 after manufacturing the parts.

  A pair of pulley plates 14a and 14b are coupled to both ends of the pulley plate coupling portion 11a of the pulley shaft 11 by fastening means such as fixing bolts. A pulley shaft insertion hole 12 is formed through the center of each pulley plate 14a, 14b, and a plurality of slide grooves 13 are formed radially around the pulley shaft insertion hole 12.

  A plurality of belt support tables 15 are inserted between the pulley plates 14a and 14b so as to be movable in the radial direction. A belt locking ratchet gear portion 15a is formed on the outer surface of each belt support base 15, slide portions 15b inserted into the slide grooves 13 of the pulley plates 14a and 14b, and pulley plates 14a and 14b at both ends. Guide projections 15c are formed on the outer side surfaces of the guide projections 15c.

  At this time, the plurality of slide grooves 13 formed in each of the pulley plates 14a and 14b can be formed radially around the pulley shaft insertion hole 12, but with respect to a straight line passing through the center of the pulley plate. It is desirable to form each so as to incline at a certain angle, and the inclination angle should be selected within a range of 0 to 90 degrees depending on the size, standard and application range of the continuously variable transmission. preferable.

  The plurality of slide grooves 13 formed in the pulley plates 14a and 14b in this way are formed radially around the pulley shaft insertion hole 12, but have a fixed angle with respect to a straight line passing through the center of the pulley plate. Each of the belt support ratchet gears 15a formed on the outer surface of the belt support 15 is formed so as to be inclined at the same angle. A plurality of belt support bases 15 inserted and installed between the slide grooves 13 come into contact with the belt 50 while moving in the radial direction in a state inclined by the above angle with respect to the axial center line of the pulley shaft 11. This prevents the belt locking ratchet gear portion 15a formed on the outer surface of the plurality of belt support bases 15 from coming into contact with the belt 50 at one time. Since the belt 50 sequentially comes into contact with the belt 50 from one side of the check gear portion 15a, an impact generated when the plurality of belt support bases 15 and the belt 50 come into contact with each other in the process of changing the pulley diameter. Not only can the noise be reduced, but also more stable gear shifting can be achieved even at high speeds.

  The number of the belt support bases 15 is the maximum number by uniformly dividing the circle corresponding to the minimum diameter of the pulley according to the design conditions so that the belt 50 can be smoothly rotated while the belt 50 is stably supported. Although advantageously formed, the size of the ratchet gear portion 15a for locking the belt formed on the outer surface of the belt support base 15, the strength of the slide portions 15b and the guide projections 15c installed at both ends, processing and assembly In consideration of the properties, it is preferable to form about 24 pieces.

  A pair of transmission plates 18a and 18b are rotatably mounted on the outer surfaces of the pulley plates 14a and 14b respectively coupled to both ends of the pulley plate coupling portion 11a of the pulley shaft 11 with a thrust bearing 18 interposed therebetween. A pulley shaft insertion hole 16 is formed through the center of each transmission plate 18a, 18b, and a plurality of belt support bases inserted between the pulley plates 14a, 14b around the pulley shaft insertion hole 16. A plurality of involute curved grooves 17 into which 15 guide protrusions 15c are respectively inserted are formed radially.

  At this time, the reason why the plurality of grooves 17 formed so that the guide projections 15c of the belt support bases 15 are guided on the transmission plates 18a and 18b in the form of an involute curve is necessary for shifting. Force, that is, the rotational force of the transmission plates 18a and 18b necessary to move the plurality of belt support bases 15 inserted and installed between the pulley plates 14a and 14b in the radial direction has the largest pulley diameter. This is because it is possible to always transmit uniformly to the plurality of belt support bases 15 up to the smallest part in a certain part, and to make it possible to shift with the same rotational force in any range.

  The transmission plates 18a and 18b, which are rotatably installed on the outer surfaces of the pulley plates 14a and 14b, are rotated in opposite directions by the transmission plate rotating device, and are inserted between the pulley plates 14a and 14b. The plurality of belt supporters 15 thus made can be moved in the radial direction.

  As shown in FIG. 6, the transmission plate rotating device for rotating the transmission plates 18a, 18b in opposite directions is a pair of hydraulic actuators 24a, which are coupled to each other at the center of the outer surface of the transmission plates 18a, 18b. The pulley shaft 11 communicates with the hydraulic fluid passage 25 formed inside the pulley shaft 11 and the hydraulic fluid passage 25 formed inside the pulley shaft 11 in order to apply hydraulic pressure to the hydraulic actuators 24a and 24b. The oil oil inlet / outlet port 26 is rotatably inserted and installed on one side of the outer peripheral surface.

  The pair of hydraulic actuators 24a, 24b constituting the transmission plate rotating device are coupled and installed at the center of the outer surface of each of the transmission plates 18a, 18b, so that as shown in FIG. 11 is formed and through holes 19 are formed, and fixedly installed so that partition walls 21a and 21b dividing the oil chamber 20 into two spaces are opposed to both sides of the housing 21 in which the oil chamber 20 is formed. The oil chamber 20 divided into two spaces by the partition walls 21a and 21b is coupled to the outer peripheral surface of the pulley shaft 11 inserted through the housing 21 so as to rotate together with the pulley shaft 11. The rotor 22 is inserted and installed, and the oil chamber is divided into two spaces by partition walls 21a and 21b on both sides of the outer peripheral surface of the rotor 22 Bain 23a for dividing 0 into four spaces, 23b are constituted by protruding.

  At this time, oil seals 27 and 28 for closing the four spaces divided by the partition walls 21a and 21b and the vanes 23a and 23b installed in the housing 21 are installed.

  A plurality of oil oil access holes 22 a and 22 b are formed through the outer peripheral surface of the rotor 22. The oil oil inlet / outlet holes 22 a and 22 b communicate with a hydraulic oil passage 25 formed in the pulley shaft 11 by an oil groove formed in the inner peripheral surface of the rotor 22.

  The hydraulic oil passage 25 is for applying a stable hydraulic pressure to the hydraulic actuators 24a and 24b that rotate together with the pulley shaft 11, and is connected to the transmission plates 18a and 18b, respectively. It is formed in the pulley shaft 11 so as to communicate with a plurality of oil oil inlet / outlet holes 22a, 22b formed through the rotor 22 inserted and installed in each housing 21.

  The oil oil inlet / outlet port 26 is for connecting a hydraulic pressure supply device to a hydraulic oil passage 25 formed in the pulley shaft 11 that rotates at a constant speed, and the hydraulic oil formed in the pulley shaft 11. The pulley shaft 11 is rotatably inserted and installed on one side of the outer peripheral surface of the pulley shaft 11 so as to communicate with the passage 25.

  At this time, a pair of oil oil inlet / outlet holes 26 a and 26 b are formed through one side of the outer peripheral surface of the oil oil inlet / outlet port 26. The oil oil inlet / outlet holes 26a and 26b communicate with a hydraulic oil passage 25 formed in the pulley shaft 11 by an oil groove formed in the inner peripheral surface of the oil oil inlet / outlet port 26.

  Then, as shown in FIG. 6, the hydraulic pressure supply line of the transmission plate rotating device flows through the oil oil inlet / outlet hole 26a of the oil oil inlet / outlet port 26 that is rotatably inserted and installed on one side of the outer peripheral surface of the pulley shaft 11. Second oil passage formed in the pulley shaft 11 after the oil is introduced into the hydraulic actuator 24a and the hydraulic actuator 24b through the first hydraulic oil passage 25a formed in the pulley shaft 11, respectively. The second hydraulic oil passage formed inside the pulley shaft 11 through the oil oil inlet / outlet port 26b of the oil oil inlet / outlet port 26 through the oil oil inlet / outlet port 26b through the oil oil inlet / outlet port 26b. Formed in the pulley shaft 11 after flowing into the hydraulic actuator 24b and the hydraulic actuator 24a through 25b, respectively. And it is configured to return through an oil oil inflow and outflow hole 26a of the oil Oil and out port 26 through the first hydraulic oil passage 25a.

  On the other hand, the variable driven pulley 30 has the same structure as that of the variable drive pulley 10, but as shown in FIG. 2, the belt locking ratchet gear provided on the outer surface of the belt support 31 of the variable driven pulley 30 is provided. The portion 31a is formed to be opposite to the inclination direction of the belt locking ratchet gear portion 15a formed on the belt support 15 of the variable driven pulley 10.

  At this time, the belt locking ratchet gear portion 15 a provided on the outer surface of the belt support 15 of the variable drive pulley 10 and the belt locking ratchet provided on the outer surface of the belt support 31 of the variable driven pulley 30. It is preferable that the gear portions 31a are formed on the same line so as to reduce the impact at the time of shifting and maintain a more stable and balanced belt locking state, and the positions thereof are different from each other.

  That is, as shown in FIG. 2, when the belt locking ratchet gear portions 15 a of the variable drive pulley 10 are formed on both sides of the belt support base 15, the belt locking ratchet of the variable driven pulley 30. When the gear portion 31a is formed at the center of the outer surface of the belt support 31, and the ratchet gear portion 15a for locking the belt of the variable drive pulley 10 is formed at the center of the outer surface of the belt support 15, the variable driven pulley Thirty belt locking ratchet gear portions 31 a are formed on both sides of the outer surface of the belt support 31.

  The belt 50 is formed on the inner peripheral surface of the driving side ratchet gear portion 51 that meshes with the belt locking ratchet gear portion 15 a formed on the belt support base 15 of the variable drive pulley 10 and the belt support base 31 of the variable driven pulley 30. The driven side ratchet gear portion 52 that meshes with the belt locking ratchet gear portion 31a is formed.

  At this time, the belt 50 can be formed in the form of a flat belt or a link belt. When the belt 50 is formed in the form of a flat belt, the belt 50 is made of the same material as the existing belt. In order to improve the durability, a metal material, a synthetic resin, or a carbon fiber material is preferably used.

  When the belt 50 is formed in the form of a link belt, as shown in FIG. 3, the drive side ratchet gear that meshes with the belt locking ratchet gear portion 15a formed on the belt support 15 of the variable drive pulley 10. A plurality of link plates 53 formed with a portion 51 and a plurality of driven side ratchet gear portions 52 that mesh with a belt locking ratchet gear portion 31a formed on the belt support 31 of the variable driven pulley 30. The link plate 54 is preferably connected by link pins 55.

  The drive side ratchet gear portion 51 and the driven side ratchet gear portion 52 provided on the inner peripheral surface of the belt 50 are used for locking the belt of the variable drive pulley 10 and the variable driven pulley 30. It is preferable to form it so as to correspond to the position of the ratchet gear portion 31a.

  That is, as shown in FIGS. 2 and 3, the belt locking ratchet gear portion 15 a of the variable drive pulley 10 and the belt locking ratchet gear portion 31 a of the variable driven pulley 30 are arranged on the outer surface of the belt support 15. If formed on both sides and the center of the outer surface of the belt support 31, the drive side ratchet gear portion 51 and the driven side ratchet gear portion 52 provided on the inner peripheral surface of the belt 50 are connected to both sides of the inner peripheral surface of the belt 50. The ratchet gear portion 15a for locking the belt of the variable drive pulley 10 and the ratchet gear portion 31a for locking the belt of the variable driven pulley 30 are formed at the center of the inner peripheral surface. If formed on both sides of the outer surface of the base 31, the drive side ratchet gear portion 51 and the driven side ratchet gear portion 52 provided on the inner peripheral surface of the belt 50 are Respectively formed on both sides the inner peripheral surface center and the inner peripheral surface of the bets 50.

  The operational relationship of the belt type continuously variable transmission according to the present invention configured as described above will be described as follows.

  The belt type continuously variable transmission according to the present invention includes a hydraulic pressure supply device (not shown) connected to an oil oil inlet / outlet port 26 of a transmission plate rotating device installed in each of the variable drive pulley 10 and the variable driven pulley 30. By operating the hydraulic actuators 24a and 24b, the diameter of the pulley can be changed easily and smoothly.

  That is, as shown in FIGS. 7A and 7B, when trying to reduce the diameter of the variable drive pulley 10 having a large diameter, it is rotatably installed on one side of the outer peripheral surface of the pulley shaft 11. The hydraulic actuators 24a and 24b connected to the center of the outer surface of the transmission plates 18a and 18b through the oil oil inlet / outlet port 26a of the oil oil inlet / outlet port 26 and the first hydraulic oil passage 25a formed inside the pulley shaft 11, respectively. To supply oil.

  As shown in FIG. 7A, the oil supplied to the hydraulic actuator 24a coupled and installed at the center of the outer surface of the transmission plate 18a has a plurality of oil oil access holes formed through the rotor 22. The oil pressure is applied to the partition walls 21a and 21b fixedly installed inside the housing 21 by flowing into the first space 20a and the third space 20c of the oil chamber 20 formed inside the housing 21 through 22a. The housing 21 rotates while oil stored in the second space 20b and the fourth space 20d flows out through the oil oil inlet / outlet hole 22b of the rotor 22, and the housing 21 rotates to be coupled to the housing 21. The existing transmission plate 18a rotates in the clockwise direction.

  Then, the oil supplied to the hydraulic actuator 24a coupled to the central portion of the outer surface of the transmission plate 18b rotates the transmission plate 18b coupled to the hydraulic actuator 24b counterclockwise by operating the hydraulic actuator 24b. To come.

  At this time, the transmission plates 18a and 18b are installed so that the rotors 22 installed in the respective housings 21 of the hydraulic actuators 24a and 24b intersect with each other in an X shape, that is, the rotor 22 of the hydraulic actuator 24a is connected to the vane 23a. , 23b are installed to face the 5 o'clock direction and the 11 o'clock direction, respectively, and the rotor 22 of the hydraulic actuator 24b is installed so that the vanes 23a, 23b face the 1 o'clock direction and the 7 o'clock direction, respectively. Each time hydraulic pressure is applied to the hydraulic actuators 24a and 24b, they rotate in opposite directions.

  Thus, when the transmission plates 18a and 18b are rotated in opposite directions by the hydraulic actuators 24a and 24b, the transmission plates 18a and 18b are rotated on the guide protrusions 15c of the belt support base 15 inserted into the involute curve grooves 17 of the transmission plates 18a and 18b. As the force is applied and the rotational force of the transmission plates 18a and 18b is applied to the guide projections 15c formed at both end portions of the belt support base 15, the slide portion 15b of the belt support base 15 becomes the pulley. By moving toward the center of the pulley along the slide grooves 13 of the plates 14a and 14b, the diameter of the variable drive pulley 10 formed by the plurality of belt support bases 15 can be easily and smoothly reduced. be able to.

  Subsequently, when it is intended to increase the diameter of the small variable drive pulley 10 as shown in FIGS. 8A and 8B, the oil that is rotatably installed on one side of the outer peripheral surface of the pulley shaft 11 is used. Oil is supplied to hydraulic actuators 24a and 24b that are coupled and installed at the center of the outer surface of the transmission plates 18a and 18b through an oil oil inlet / outlet port 26b of the oil inlet / outlet port 26 and a second hydraulic oil passage 25b formed inside the pulley shaft 11, respectively. Will come to supply.

  The oil supplied to the hydraulic actuator 24 a coupled to the central portion of the outer surface of the transmission plate 18 a is supplied to the oil chamber 20 formed in the housing 21 through a plurality of oil oil inlet / outlet holes 22 b formed through the rotor 22. Into the second space 20b and the fourth space 20d, and hydraulic pressure is applied to the partition walls 21a and 21b fixedly installed inside the housing 21, so that the second space 20b and the fourth space 20d of the oil chamber 20 are applied. The oil stored in the first space 20a and the third space 20c of the oil chamber 20 by applying hydraulic pressure to the partition walls 21a and 21b fixedly installed inside the housing 21 by the inflowed oil causes the oil oil inlet / outlet hole 22a of the rotor 22 to be stored. The housing 21 rotates while flowing out through the housing 21, and the housing 21 rotates. Shift plate 18a that is coupled to the housing 21 is to rotate in a counterclockwise direction by.

  The oil supplied to the hydraulic actuator 24b coupled to the central portion of the outer surface of the transmission plate 18b rotates the transmission plate 18b coupled to the hydraulic actuator 24b in the clockwise direction by operating the hydraulic actuator 24b. It becomes like this.

  Thus, when the transmission plates 18a and 18b are rotated in opposite directions by the hydraulic actuators 24a and 24b, the transmission plates 18a and 18b are rotated on the guide protrusions 15c of the belt support base 15 inserted into the involute curve grooves 17 of the transmission plates 18a and 18b. A force is applied, and the rotational force of the transmission plates 18a and 18b is applied to the guide protrusions 15c formed on both end portions of the belt support base 15, respectively, so that the slide portion 15b of the belt support base 15 becomes the pulley plates 14a and 14b. It moves in the direction opposite to the pulley center along the slide groove 13. Thereby, the diameter of the variable drive pulley 10 formed by the plurality of belt supporters 15 can be easily and smoothly increased.

  On the other hand, the variable driven pulley 30 is installed when the installation direction of the rotor 22 installed inside the hydraulic actuators 24a and 24b is installed opposite to the variable drive pulley 10, and hydraulic pressure is applied to the hydraulic actuators 24a and 24b. Since the transmission plates 18a and 18b rotate in opposite directions to the variable drive pulley 10, the diameter decreases when the diameter of the variable drive pulley 10 increases, and the diameter decreases when the diameter of the variable drive pulley 10 decreases. It operates so as to conflict with the variable drive pulley 10 so as to increase.

  Thus, the variable driven pulley 30 can smoothly adjust the tension of the belt 50 applied between the variable drive pulley 10 and the variable driven pulley 30 by changing the diameter by the operation opposite to that of the variable drive pulley 10. It becomes like this.

  Therefore, the belt-type continuously variable transmission according to the present invention can change the diameters of the variable drive pulley 10 and the variable driven pulley 30 more easily and smoothly, so that more accurate and efficient continuously variable transmission is possible. become.

  In the belt type continuously variable transmission according to the present invention, the drive side ratchet gear portion 51 formed on one side of the inner peripheral surface of the belt 50 is provided outside the plurality of belt support bases 15 provided in the variable drive pulley 10. A plurality of belt support bases provided on the variable driven pulley 30, wherein the driven side ratchet gear portion 52 formed on the inner peripheral surface other shaft is firmly engaged with the belt locking ratchet gear portion 15 a formed on the side surface. Since it rotates in a state in which it is firmly engaged with the belt locking ratchet gear portion 31a formed on the outer surface of the belt 31, a slip phenomenon occurs between the pulley and the belt even when a large load is applied. It can be effectively prevented.

  In addition, the belt type continuously variable transmission according to the present invention has a wide width of the variable drive pulley 10 and the variable driven pulley 30 and a belt locking ratchet formed on the outer surface of the belt support bases 15 and 31, respectively. By increasing the number of belts 50 between the gear portions 15a and 31a and the variable drive pulley 10 and the variable driven pulley 30, the transmission can be enlarged. It can be safely applied to devices used in various industrial fields such as hoists, conveyors for goods transfer, winches, elevators and escalators.

DESCRIPTION OF SYMBOLS 1; Continuously variable transmission 10; Variable drive pulley 11; Pulley shaft 11a; Pulley plate coupling | bond part 12; Pulley shaft insertion hole 13; Slide groove 14a, 14b; Pulley plate 15; Belt support base 15a; Part 15b; Slide part 15c; Guide projection 16; Pulley shaft insertion hole 17; Involute curve groove 18; Thrust bearing 18a, 18b; Transmission plate 19; Through hole 20; Oil chamber 21; Housing 21a, 21b; , 22b; oil oil inlet / outlet holes 23a, 23b; vanes 24a, 24b; hydraulic actuator 25; hydraulic oil passage 26; oil oil inlet / outlet ports 26a, 26b; oil oil inlet / outlet holes 27, 28; oil seal 30; Belt support 31a; belt locking ratchet gear 50; bell 51; driving-side ratchet gear portion 52; driven-side ratchet gear portion

Claims (2)

The variable drive pulley (10) for controlling the transmission ratio by changing the diameter, and the variable drive pulley (10) and the belt (50) connected to each other by the operation opposite to the variable drive pulley (10) to change the diameter. In the belt type continuously variable transmission comprising a variable driven pulley (30) for adjusting the tension of the belt (50),
The variable drive pulley (10)
A pulley shaft (11) having a pulley plate coupling portion (11a) formed at a central portion of the outer peripheral surface;
The pulley shaft (11) is coupled to both ends of the pulley plate coupling portion (11a), and a pulley shaft insertion hole (12) is formed through the central portion. A plurality of pulley shaft insertion holes (12) are formed around the pulley shaft insertion hole (12). A pair of pulley plates (14a, 14b) in which a plurality of slide grooves 13 are radially formed;
The pulley plate (14a, 14b) is inserted and installed so as to be movable in the radial direction, a belt locking ratchet gear portion (15a) is formed on the outer surface, and the pulley plates (14a, 14b) are formed at both ends. A plurality of belt support bases (15) formed with guide protrusions (15c) projecting on the outer surfaces of the slide portions (15b) and pulley plates (14a, 14b) respectively inserted into the slide grooves (13) of the belt )When,
The pulley shaft (11) is coupled to both ends of the pulley plate coupling portion (11a), and is rotatably installed on the outer surfaces of the pulley plates (14a, 14b) via thrust bearings (18), A plurality of pulley shaft insertion holes (16) are formed through the central portion, and the plurality of belt supports inserted and installed between the pulley plates (14a, 14b) around the pulley shaft insertion holes (16). A pair of transmission plates (18a, 18b) in which a plurality of involute curved grooves (17) into which guide protrusions (15c) of the base (15) are respectively inserted are radially formed;
The transmission plates (18a, 18b), which are rotatably installed on the outer surfaces of the pulley plates (14a, 14b), are rotated in opposite directions and inserted between the pulley plates (14a, 14b). A transmission plate rotating device configured to move a plurality of the belt support bases (15) in a radial direction;
The variable driven pulley (30) has the same structure as that of the variable drive pulley (10). However, the variable driven pulley (30) is provided for locking the belt provided on the outer surface of the belt support base (31) of the variable driven pulley (30). The ratchet gear portion (31a) is formed to be opposite to the inclination direction of the belt locking ratchet gear portion (15a) formed on the belt support (15) of the variable drive pulley (10).
The belt (50) has a drive side ratchet gear portion (51) meshing with a belt locking ratchet gear portion (15a) formed on an inner peripheral surface of the belt support base (15) of the variable drive pulley (10). And a driven side ratchet gear portion (52) meshing with a belt locking ratchet gear portion (31a) formed on a belt support (31) of the variable driven pulley (30). Type continuously variable transmission. The transmission plate rotating device includes:
The transmission plate (18a, 18b) is coupled and installed at the center of the outer side surface, and a through hole (19) through which the pulley shaft (11) passes is formed on the front and rear surfaces, and an oil chamber (20) is formed inside. A partition wall (21a, 21b) that divides the oil chamber (20) into two spaces is fixedly installed on both sides of the housing (21) so as to face each other, and the partition wall (21a, 21b) creates two spaces. The divided oil chamber (20) is coupled to the outer peripheral surface of the pulley shaft (11) inserted through the housing (21) so as to rotate together with the pulley shaft (11). The oil chamber (20) divided into two spaces by the partition walls (21a, 21b) on both sides of the outer peripheral surface of the rotor (22). Bain dividing into four spaces (23a, 23b) pair of hydraulic actuator configured to protrude formation (24a, 24b),
The rotor (inserted and installed in each housing 21 of the hydraulic actuator (24a, 24b) in order to apply hydraulic pressure to the hydraulic actuator (24a, 24b) connected to the transmission plate (18a, 18b). 22) a hydraulic oil passage (25) formed inside the pulley shaft 11 so as to communicate with a plurality of oil oil inlet / outlet holes (22a, 22b) formed in the through hole;
An oil oil inlet / outlet port (26) rotatably inserted on one side of the outer peripheral surface of the pulley shaft (11) so as to communicate with the hydraulic oil passage (25) formed inside the pulley shaft (11). The belt-type continuously variable transmission according to claim 1, comprising:

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