MULTIPLE-CHAIN ​​VARIABLE-RATIO TRANSMISSION (CVT) SYSTEM

Abstract

MULTIPLE-CHAIN ​​VARIABLE-RATIO TRANSMISSION (CVT) SYSTEM This invention relates to a multi-chain CVT mechanism developed to increase torque transmission capacity, prevent chain slippage and optimize power distribution in variable ratio transmissions (CVT) used in the automotive and machinery manufacturing industries. In the system described in the invention; the input shaft (1) and the output Torque transmission through pulley groups (3a, 3b, 4a, 4b) located between the shafts (2) is provided by multiple transmission chains (15, 16) in parallel and the rotational speed and torque balance between these chains are synchronized by means of an integrated differential mechanism (10, 11, 12, 13).

Description

1 TARIFF THE TITLE OF THE INVENTION MULTIPLE-CHAIN ​​VARIABLE-RATIO TRANSMISSION (CVT) SYSTEM THE TECHNICAL FIELD TO WHICH THE INVENTION RELATES This invention relates to drivetrain systems used in the automotive and machinery manufacturing industries. The invention is defined in 5 Especially in continuously variable transmissions (CVTs), it increases torque transmission capacity and reduces chain slippage. Developed to prevent and optimize power distribution, synchronizing multiple chains. It is related to a variable transmission (CVT) mechanism in which it operates. PREVIOUS TECHNIQUE (KNOWN SITUATION) In traditional CVT transmission systems used today, the drive and driven pulleys are 10 Torque transmission between them is via a single steel belt or a single heavy-duty steel chain. This is provided by systems that use a chain and pulley for high torque demands or sudden acceleration. Friction, heating, and slippage occur between the surfaces. Excessive load on a single chain and the pulleys it is attached to shortens the life of the transmission and damages the gearbox. This reduces its efficiency. In patent applications related to the known situation, 15 is used to increase torque capacity. Generally, the chain width has been increased or the pulley surfaces have been modified. However, the only part that has expanded is the chain. Chains provide only partial solutions and lead to a loss of flexibility. TECHNICAL PROBLEMS THAT THE INVENTION AIMS TO SOLVE The invention refers to a multi-chain variable transmission (CVT) system with the following technology currently in use: problems are eliminated: 20 - Distributing the torque load from a single chain across multiple chains reduces the risk of chain breakage and wear. It has been reduced. - Chain slippage under high torque is prevented by increasing the number of contact areas on the pulley surface. The slippage problem has been prevented. - Friction and heating can be reduced by decreasing the tension applied to the chain. 25 - The use of multiple chains is also becoming feasible for vehicles requiring high torque transmission. - This gear system can be combined with other gear systems using planetary gear mechanisms. It is possible to come. EXPLANATION OF THE FIGURES Figure 1: General schematic view of a dual-chain CVT system. 30 Figure 2: Diagram showing the multiple differential coupling scheme for a multi-chain system. 2 NUMBERING THE PARTS / COMPARTS IN THE FIGURES Figure 1: 1: Input shaft 2: Output shaft 3a: Input movable conical pulleys 5 3b: Input fixed tapered pulleys 4a: Output moving tapered pulleys 4b: Output fixed tapered pulleys 5: Clamping and loosening mechanism 6: Movable connecting piece 10 7: Input pulley fixing part 8: Differential left arm 9: Differential right arm 10: Axial fixed differential left gear 11: Axial fixed differential right gear 15 12: Differential planetary gear 13: Differential planetary gear carrier 14: Output pulley stabilizing part 15: First chain or V-belt 16: Second chain or V-belt 20 Figure 2: 1a, 1b, 1c, 1d: Differential pulley linkage arms. 2a, 2b: Center (motion-carrying) differential arms. 7a, 7b, 7c: Planetary gear carriers 6a, 6b, 6c, 6d, 6e, 6f: Planetary gears 25 5a, 5b, 5c, 5d, 5e, 5f: Fixed in the axial direction (fixed on the shaft), able to rotate around its own center. differential gears 17: Output shaft 3 DETAILED EXPLANATION OF THE INVENTION Figure 1: The system that is the subject of the invention takes the rotational motion from the motor via the input shaft (1) to the primary It transmits to the pulley set (3a, 3b). The first pulley set (3a, 3b) consists of a fixed tapered pulley (3b) and a shaft. from a movable compression and release mechanism that can move axially (3a, 5, 6,7) It consists of 5. Unlike traditional systems, between the first set of pulleys (3a, 3b) and the second set of pulleys (4a, 4b) a primary transmission chain (15) and a parallel-positioned primary transmission chain to provide torque transmission. second transmission chain (16) and a placed between the pulleys to ensure speed and torque sharing. Differential (10,11,12,13) ​​is included. The movable input conical pulleys (3a) move inwards in the axial direction (towards the fixed pulleys) 10 When this happens, both the first transmission chain (15) and the second transmission chain (16) are on the pulley surface at the same time. It rises or falls. The pulleys (4a,4b) that receive the movement move in the opposite direction (the chain). (to prevent it from loosening) it is lowered or raised with the help of a compression and relaxation mechanism (5, 6, 14). This The pulleys that transmit and receive motion create a gear ratio, just like gears. Since the diameters are constantly changing... The gear ratio will also vary. 15 This prevents the chains from sharing torque and experiencing speed discrepancies among themselves. Planetary gear mechanism / differential (10, 11, 12, 13) integrated into the system for the purpose of task It does. If a distribution with different torque ratios is desired, a planetary gear mechanism is used, while for an equal-ratio distribution... If desired, a differential must be used. Differentials and planetary gears are connected to each other to form a chain. Or the number of V-belts can be increased as needed. 20 These gear mechanisms (differential / planetary gears) combine the speeds from the chains (15, 16). Their adaptability is limitless, regardless of the diameters created on the pulleys. Synchronization It is excellent. In Figure 1, the differential we used in the drawing is fixed in two axial directions (in the arm it is located in). It consists of (fixed) gears (10, 11) and planetary gears (12) connected to these gears. The gears (12) are connected to each other by means of a carrier (13). This carrier (13) is connected to the output shaft (2) 25 The other gears of the differential are connected to the output pulleys (4a, 4b) via arms (8, 9). If we want to use more than two chains, we can use the movement shown in Figure 2 on the right and left sides. The carrier parts (7a, 7c) of the differentials, which are connected to the planetary gears, are located in the middle (output). The axial gears (5c, 5d) of the differential (to which the shaft is attached) are connected by arms (2a, 2b). It is connected. The carrier of the differential in the middle (7b) is connected to the output shaft (17). In Figure 2, 4 x 30 There are linkage pulley arms (1a, 1b, 1c, 1d) for the chain; this allows for 4 chains or V-belts. It means we can use it. If we want to increase the number of chains, we need to adjust the differentials on the left and right, which are the sensors that take up motion. We can connect a new differential to any of the arms (1a, 1b, 1c, 1d) of the existing differentials. These arms are... (1a, 1b, 1c, 1d) are connected to the planetary gear carrier of the differential to be added. In short, in a differential, 1 35 A planetary gear carrier has two axially fixed gears and two gears that rotate around their own center. This An arm (a tubular shaft) is attached to the axially fixed gears and connected to the carrier of another differential. By connecting them, the system can be expanded as much as needed.

Claims

1 REQUESTS 1. The invention describes an input shaft (1) that receives rotational motion from the motor, and at least one primary spindle that rotates with this motion. pulley set (3a, 3b), at least one second pulley set (4a, 4b) receiving the transmitted motion and the output motion It is a variable ratio transmission (CVT) system which includes a transmitting output shaft (2), and its feature is; The torque transmission between the first pulley set (3a, 3b) and the second pulley set (4a, 4b) is in parallel. at least two transmission chains positioned to share as (15, 16) and these transmission chains (15, 16) at least one gear that transmits the torque load to the output shaft (2) by synchronizing the rotational speed. It contains a balancing mechanism (10, 11, 12, 13).

2. A variable ratio transmission (CVT) system conforming to Claim 1, characterized by its gear ratios. The balancing mechanism is in a differential structure and the arms from the second pulley set (4a, 4b) are 10 Two axial fixed side gears (10, 11) that receive the motion via (8, 9), at least the gears engaged with these gears a planetary gear (12) and a planetary gear (12) attached to the output shaft (2) carrying the said planetary gears (12). It includes a planetary gear carrier (13).

3. A variable ratio transmission (CVT) system conforming to Claim 1, with the characteristic of transmission chains (15, 16) When it is desired to provide power distribution with different torque ratios between them, the gear balancing in question is 15. The mechanism must be structured as at least one planetary gear mechanism.

4. A variable transmission (CVT) system conforming to claims 1 and 2, characterized by having more than two planetary carriers of differentials that receive motion to enable the use of transmission chains (7a, 7c) axially fixed gears of the differential that transmit at least one motion to the output shaft (5c, 5d) 20 The planet carrier of the differential (7b) which connects and transmits the motion to the output shaft (17) 20 It contains a modular multi-differential linkage structure obtained by connecting them.

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