Transfer with a fluid, changing transfer ratio

Abstract

Transfer with a fluidly changing transfer ratio, exhibiting: a universal self-centered system comprising an outer web (2) and a central web (1) which are located in a plane, wherein the outer web (2) surrounds the central web (1) and three or more gears (6, 11) are rotatably mounted on each web (1, 2) and are connected by a chain (4), an input shaft attached to the outer web (2), a wave (8) for displacing an axis of the central web (1) with respect to an axis of the outer web (2) along an arc (5) passing through a center point of the universal self-centered system, which is given by the axes of the outer web (2) and the central web (1) at their intersection, wherein an axis of the wave (8) coincides with a center point of the arc (5), wherein points of the chain (4) between adjacent gears (11) are used to tension the chain (4) by means of rollers (10) which are cushioned by a spring (7), and wherein on an axis with the gears (6) on the central web (1) transfer gears (12) are attached which transfer a torque to a gear (13) connected to an output shaft (14).

Description

Technical field

[0001] The invention relates to transmissions or switchable couplings. The invention can be used in mechanical engineering for the design of devices containing sleeves or transmissions. Technical background

[0002] A method of realizing a coupling by means of the braking action of a brake gear in a system of interaction between two shafts is known. When the brake gear of an external brake sleeve or brake shoe acts, a torque is transferred between the input shaft and the output shaft (DE 10 2014 003 957 A1). A disadvantage of this method is the presence of rotating friction surfaces.

[0003] A planetary gear set with a medial arrangement of a brake sleeve is known. This planetary gear set with the medial arrangement of the brake sleeve contains an identical number of brake gears and planet gears, the planet gears being mounted on a shaft rotatable about two parallel axes. The brake gears are rotatable about their own axis and can be braked by means of the brake sleeve. The sun gear is mounted on the input shaft, and the output shaft is connected to the arm. The brake gears are designed as rings with teeth on their medial surface and are supported on a gear set body by means of their bearings. The brake sleeve interacts with a medial surface of cylindrical parts of the brake gears (RU 2014 130 927 A). A disadvantage of such a planetary gear set is the inconsistent switching of the gear set.

[0004] Transmissions for stepless adjustment of the gear ratio, disclosed in DE 37 31 490 A1, DE 43 29 441 A1 and US 3 874 253 A, use one-way clutches or freewheels, in which a load transfer occurs for locking upon engagement. DE 43 29 441 A1 discloses a transmission consisting of a disk carrying smaller-diameter gears that are radially displaceable, can rotate about their own axis in one direction via freewheels, and are engaged with a counterpart. The axis of the disk can be displaced eccentrically relative to the axis of the counterpart, resulting in different rotational speed ratios between the disk and the counterpart depending on the eccentricity.

[0005] A universal self-centered system is known in which only the static properties are used. The universal self-centering system is known from RU 2014 106 630 A, RU 2014 106 628 A, RU 2014 106 627 A, RU 2014 106 146 A, RU 2013 157 051 A, RU 2013 154 311 A, RU 2013 153 163 A, RU 2013 152 649 A, RU 2013 148 896 A, RU 2013 145 988 A, RU 2013 145 987 A, RU 2013 145 253 A, RU 2013 144 445 A, RU 2013 144 444 A, RU 2013 142 690 A, RU 2013 142 204 A, RU 2013 142 203 A, DE 10 2013 019 629 A1, DE 10 2013 019 628 A1, DE 10 2013 019 627 A1, DE 10 2013 019 593 A1, DE 10 2013 019 592 A1, DE 10 2013 019 404 A1, DE 10 2013 019 402 A1, DE 10 2012 018 132 A1, DE 10 2012 018 131 A1, DE 10 2012 017 180 A1, DE 10 2012 016 380 A1, DE 10 2012 016 314 A1, DE 10 2012 013 308 A1, DE 10 2012 012 586 A1, DE 10 2012 002 076 A1, DE 10 2012 001 232 A1 and DE 10 2012 000 316 A1.

[0006] The universal self-centering system has an outer and a medial base, both lying in the same plane. The outer base encompasses the medial base. Three or more rollers or gears are rotatably mounted on each base. The number of rollers on each base is identical. Each roller can be exchanged for any two interchangeable rollers to utilize a section of the rope, belt, or chain between the interchangeable rollers for tensioning. The effect of the tensioning force on the section of rope, chain, or belt between the interchangeable rollers does not affect the properties of the universal self-centering system. The method for tensioning the belt, rope, or chain is known from RU 2013 147 711 A. The static properties of the universal self-centering system were utilized in the listed inventions.The present invention is intended to utilize a dynamic property of the universal self-centering system, according to which the joint rotation of the medial and outer foundations is possible even when the axes of rotation of the foundations do not coincide. This means that the medial and outer foundations each rotate with respect to their non-coincident axes of rotation when a torque is applied to one of the foundations.

[0007] One objective of the invention is to create a transfer system with a continuously changing transmission ratio and without switched and rubbing parts by utilizing the dynamic properties of a universal self-centered system. Disclosure of the invention

[0008] The stated objective is achieved by a transfer according to claim 1, utilizing a universal self-centering system and its dynamic properties. To utilize the dynamic properties of the universal self-centering system, the axes of a medial and an outer foundation must be offset relative to each other. A transfer according to the invention with a continuously changing transmission ratio comprises an outer web and a central web lying in one plane, wherein the outer web surrounds the central web and three or more gears are rotatably mounted on each web and connected by a chain. The transfer consists of offsetting an axis of the central web relative to an axis of the outer web along an arc passing through a center point of the universal self-centering system, which is defined by the axes of the outer and central webs at their intersection. Brief description of the characters On Fig. Figure 1 shows a universal self-centered system in a rear view. On Fig. Figure 2 shows the universal self-centered system in a front view. On Fig. Figure 3 shows a section through the universal self-centered system in a front view. On Fig. Figure 4 shows a section through the universal self-centered system in a rear view. On Fig. Figure 5 shows an isometric projection of the universal self-centered system in a front view. On Fig. Figure 6 shows the isometric projection of the universal self-centered system in a rear view. On Fig. Figure 7 presents the universal self-centering system at the meeting of axes of a central and an outer bridge. Embodiments of the invention

[0009] In a concrete example of its realization, a universal self-centering system has a central web 1 and an outer web 2. Gears 6 are rotatably mounted on the central web 1 about their axes. Gears 11 are rotatably mounted on the outer web 2 about their axes. Tension is applied to the chain 4 between adjacent gears 11 by means of rollers 10, which are spring-loaded by a spring 7. Transfer gears 12, which transmit torque to a gear 13 and an output shaft 14 connected to it, are mounted on an axle with the gears 6.

[0010] The central web 1 and the outer web 2 each have an axis. An arc 5 defines the path of movement of the central web 1 when its axis is displaced relative to the axis of the outer web 2. A bearing 3 separates the output shaft 14 from a bushing 9 with a shaft 8 attached to it, the axis of which coincides with the center point of the arc 5. When the shaft 8 rotates with respect to its axis, the axis of the central web 1 is displaced along the arc 5, one end of which coincides with a center point of the universal self-centering system and the other end of which is located at a point of maximum displacement of the axis of the central web 1 from this center point. A torque is applied to an input shaft attached to the outer web 2. The input shaft is not shown in the figures.

[0011] When the axes of the outer web 2 and the central web 1 meet, as shown in Fig.7, both webs 1 and 2 rotate at the same angular velocity. All gears 6, 11, and 12 on webs 1 and 2 do not rotate, and chain 4 also remains stationary. Output shaft 14 likewise remains stationary. If the axis of the central web 1 is displaced relative to the axis of the outer web 2—this can be achieved by rotating shaft 8 relative to its axis—chain 4 begins to shift along its perimeter, and all gears 6, 11, 12, and 13 begin to rotate. The rotational speed will be proportional to the magnitude of the axis displacement. The torque is transmitted via the transfer gears 12 to gear 13 and output shaft 14.

[0012] The method for displacing the axes of the universal self-centering system ensures a smooth change in the speed of the output shaft 14 from zero, and consequently a smooth change in the transmission ratio. By changing the relationship between the diameters of the gears 6, 11, 12, and 13 of the device, the range of change in the transmission ratio can be altered. A device implementing this method contains no frictional rotating parts. The method utilizes the dynamic properties of the universal self-centering system, as both webs 1 and 2 rotate, and the rotational speed of the output shaft 14 changes when the relative displacement of the axes of webs 1 and 2 is altered. Reference symbol list 1 central footbridge 2 outer bridge 3 warehouses 4 chain 5 sheets 6 gear on central bridge 7 spring 8 shaft on bushing 9 socket 10 rolls 11 Gear on outer bridge 12 Transfer gear 13 gear 14 Output wave

Claims

Transmission with a continuously changing transmission ratio, comprising: a universal self-centered system comprising an outer web (2) and a central web (1) lying in a plane, wherein the outer web (2) surrounds the central web (1) and three or more gears (6, 11) are rotatably mounted on each web (1, 2) and are connected by a chain (4); an input shaft attached to the outer web (2); a shaft (8) for displacing an axis of the central web (1) with respect to an axis of the outer web (2) along an arc (5) passing through a center point of the universal self-centered system, which is given by the axes of the outer web (2) and the central web (1) at their intersection, wherein an axis of the shaft (8) coincides with a center point of the arc (5).wherein points of the chain (4) between adjacent gears (11) are used to tension the chain (4) by means of rollers (10) which are spring-loaded by a spring (7), and wherein on an axle with the gears (6) on the central web (1) transfer gears (12) are mounted which transmit a torque to a gear (13) connected to an output shaft (14). Transfer according to claim 1, further comprising: a bushing (9) on which the shaft (8) is mounted, and a bearing (3) which separates the output shaft (14) from the bushing (9).

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