A continuously variable transmission and its variable diameter wheel structure and use

Abstract

The present invention discloses a continuously variable transmission and its variable diameter wheel structure and use, including a mounting shaft, a first sun wheel is axially connected to the mounting shaft, a first planet wheel is meshed with the outer periphery of the first sun wheel, the first planet wheel is axially connected to the first planet carrier, and the first planet carrier is connected to the mounting shaft; the first planet wheel is connected to a belt piece through a connecting rod to form a variable diameter structure, the first sun wheel is connected to the second sun wheel, the outer periphery of the second sun wheel is meshed with the second planet wheel, the second planet wheel is axially connected to the second planet carrier, and the outer periphery of the second planet carrier forms a regulating structure; a third sun wheel is fixed on the mounting shaft, and the third sun wheel is meshed with the third planet wheel. The present invention can realize the outer diameter of two transmission wheels through a power structure, realize the stepless regulation of the transmission, and can change the width of the transmission as needed, so as to use a wider transmission belt to transmit a larger torque, greatly reducing the cost of the continuously variable transmission and simplifying its structure and control method.

Description

Technical Field

[0001] The invention belongs to the field of machinery, and in particular relates to a continuously variable transmission and a variable diameter wheel structure thereof. Background Art

[0002] The existing continuously variable transmission usually adopts a vertebral disc and a constrained steel belt, and relies on the structure of clamping the belt on both sides of the vertebral disc. Its force-bearing area is only the tightening part on both sides. If a belt is used, it is even more unsuitable for high power, so a constrained steel belt is used instead. The steel belt must be lubricated by lubricating oil to dissipate heat, and the structure is complex and the cost is high. In addition, it is difficult to manufacture and the related technology is monopolized by foreign countries and is not suitable for high-power vehicles. There are also disadvantages such as uncertain power loss. However, its advantages are indeed great, and it can achieve linear acceleration. In theory, the generated power can be fully utilized and converted into speed, but its control system is also very complex. In this regard, invention patent CN 108006177 A discloses a planetary gear tracking meshing continuously variable transmission, which realizes the change of the speed change wheel diameter through a number of radial telescopic structures, thereby realizing continuously variable speed. Although it can increase the radius of the transmission wheel as needed, it needs to set at least three radial telescopic structures, and usually six are required for stability, so two transmission wheels usually need to set 12 related structures. Therefore, its power control method is complex and costly. Therefore, it needs to be improved. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a continuously variable transmission and a variable diameter wheel structure thereof. The present invention can realize the outer diameters of two transmission wheels through a power structure, thereby realizing stepless adjustment of the transmission, and the width of the transmission can be changed as needed, thereby using a wider transmission belt to transmit a larger torque, which greatly reduces the cost of the continuously variable transmission and simplifies its structure and control method.

[0004] In order to achieve the above technical effects, the technical solution of the present invention is:

[0005] A variable diameter wheel structure comprises a mounting shaft, a first sun gear is axially connected to the mounting shaft, the outer periphery of the first sun gear is meshed with no less than three first planet gears, the first planet gear is axially connected to the first planet carrier, and the first planet carrier is fixedly connected to the mounting shaft; the first planet gear is connected to a belt piece through a connecting rod to form a variable diameter structure, the first sun gear is connected to the second sun gear, the outer periphery of the second sun gear is meshed with the second planet gear, the second planet gear is axially connected to the second planet carrier, and the outer periphery of the second planet carrier forms a regulating structure; a third sun gear is fixed to the mounting shaft, and the third sun gear is meshed with the third planet gear outside; the second sun gear and the third sun gear are of the same size, and the second planet gear and the third planet gear are of the same size; the second planet gear and the third planet gear are both meshed with an internal gear ring outside; the second sun gear is also sleeved on the mounting shaft; a connecting plate is axially connected to the mounting shaft, and the third planet gear is axially connected to the connecting plate.

[0006] As a further improvement, the mounting shaft is connected to a first power structure, and the regulating structure is connected to a second power structure.

[0007] As a further improvement, the connecting rod is L-shaped.

[0008] As a further improvement, first planet carriers are installed on both sides of the first sun gear, a plurality of rotating shafts are connected to the first planet carriers, and the first planet gears are fixedly installed on the rotating shafts; the first sun gear and the first planet gears are both in two sets.

[0009] As a further improvement, the belt piece is a smooth belt piece, a multi-ribbed belt piece, or a toothed belt piece.

[0010] As a further improvement, the regulating structure is a sprocket.

[0011] As a further improvement, the belt piece is an arc-shaped belt piece.

[0012] A continuously variable transmission comprises the above-mentioned variable diameter wheel structure, wherein the connecting rods of the two variable diameter wheel structures face opposite directions, and the regulating structure is connected to the power structure through the transmission structure, and the transmission structure is connected to the second power structure through gears; one of the two variable diameter wheel structures is connected to the first power structure; and the variable diameter structures of the two variable diameter wheel structures are connected through a transmission belt.

[0013] A further improvement is that the regulating structure is a sprocket or a transmission wheel or a connecting ear; the transmission structure is a chain or a transmission belt or a connecting rod hinged to the connecting ear, a rocker is hinged in the middle of the connecting rod, and the rocker is connected to the second power structure; the first power structure is a motor, and the second power structure is a motor, a rotary cylinder or a linear cylinder.

[0014] The continuously variable transmission is used to realize the speed change function, slow braking function or gear change function of automobiles, tractors and motorcycles.

[0015] Advantages of the present invention:

[0016] 1. Low manufacturing cost;

[0017] 2. Higher transmission efficiency;

[0018] 3. Since the contact area between the wheel and the belt can be increased as the wheel is widened, the load-bearing capacity can be increased as needed;

[0019] 4. Simple control;

[0020] 5. Occupies small space and is light in weight;

[0021] 6. The diesel engine has a large torque and a low speed, so the present invention is more suitable for the speed change of the diesel engine to further reduce energy consumption;

[0022] 7. The present invention is also suitable for automobiles, tractors, motorcycles, etc., and can also adapt to relatively poor working environment conditions and mechanical equipment, etc.

[0023] 8. When used in automobiles, it can play a role of deceleration and braking through control, greatly improving the vehicle's handling and safety. The ring gear on the passive wheel can be used as a low-speed gear transmission, while the middle shaft of the passive wheel can be used as a high-speed gear transmission, and can be used as a gear shift transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the contraction structure of the variable diameter wheel structure;

[0025] Figure 2 Schematic diagram of the unfolded structure of the variable diameter wheel structure Figure 1 ;

[0026] Figure 3 Schematic diagram of the unfolded structure of the variable diameter wheel structure Figure 2 ;

[0027] Figure 4 It is a schematic diagram of the overall structure of a continuously variable transmission;

[0028] Figure 5 This is a schematic diagram of the control structure of Example 2;

[0029] Figure 6 This is a schematic diagram of the structure of the first planet carrier. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is described in detail below through specific implementation modes and in conjunction with the accompanying drawings.

[0031] Example 1

[0032] like Figure 1-Figure 4 A continuously variable transmission shown includes two variable diameter wheel structures, the first connecting rods 5 of the two variable diameter wheel structures are in opposite directions, and the regulating structure 7 is connected to the power through the transmission structure 16, and the transmission structure 16 is connected to the second power structure through gears; one of the two variable diameter wheel structures is connected to the first power structure; the variable diameter structures of the two variable diameter wheel structures are connected through a transmission belt.

[0033] The regulating structure 7 is a gear or a transmission wheel; the transmission structure 16 is a chain or a transmission belt; the first power structure and the second power structure are both motors.

[0034] The variable diameter wheel structure comprises a mounting shaft 1, a first sun gear 2 is axially connected to the mounting shaft 1, and the outer periphery of the first sun gear 2 is meshed with no less than three first planetary gears 3, the first planetary gear 3 is axially connected to the first planet carrier 4, and the first planet carrier 4 is fixedly connected to the mounting shaft 1; the first planetary gear 3 is connected to the belt piece 6 through the first connecting rod 5 to form a variable diameter structure, the first sun gear 2 is connected to the second sun gear 8, the outer periphery of the second sun gear 8 is meshed with the second planetary gear 9, the second planetary gear 9 is axially connected to the second planetary carrier 17, and the outer periphery of the second planetary carrier 17 forms a regulating structure 7; a third sun gear 10 is fixed to the mounting shaft 1, and the third sun gear 10 is meshed with the third planetary gear 11; the second sun gear 8 is the same size as the third sun gear 10, and the second planetary gear 9 is the same size as the third planetary gear 11; the second planetary gear 9 and the third planetary gear 11 are both meshed with an inner gear ring 12; the second sun gear 8 is also sleeved on the mounting shaft 1; a connecting plate 15 is axially connected to the mounting shaft 1, and the third planetary gear 11 is axially connected to the connecting plate 15.

[0035] The mounting shaft 1 is connected to a first power structure, and the regulating structure 7 is connected to a second power structure.

[0036] The first connecting rod 5 is L-shaped.

[0037] First planet carriers 4 are installed on both sides of the first sun gear 2. A plurality of rotating shafts 13 are axially connected to the first planet carriers 4. The first planet gears 3 are fixedly installed on the rotating shafts 13. The first sun gear 2 and the first planet gears 3 are both in two sets.

[0038] A plurality of grooves 14 are formed on the belt piece 6. A connecting plate 15 is axially connected to the mounting shaft 1. The regulating structure 7 is a sprocket.

[0039] The method of using the present invention is as follows:

[0040] When the transmission is in progress, the control structure 7 is braked by the second power mechanism, and the first power mechanism is connected to a mounting shaft 1 of a variable diameter wheel structure to rotate, and the mounting shaft drives the first planet carrier 4 and the third sun gear 10 to rotate at the same time; the third sun gear 10 drives the second sun gear 8 to rotate through the third planet gear 11, the inner gear ring 12 and the second planet gear 9 in sequence, so as to ensure that the first sun gear and the first planet carrier have the same speed, that is, the first planet gear 3 cannot rotate by itself, so that under the pressure of the transmission belt, the outer diameter will not change due to rotation. When the transmission ratio needs to be changed, the second power mechanism drives the control structure 7 to rotate, that is, the second planet carrier 17 rotates accordingly. Since the speed of the mounting shaft 1 is consistent with that of the third sun gear 10, and the corresponding inner gear ring 12 has a constant speed, the rotation of the second planet carrier 17 is transmitted to the second sun gear through the second planet gear, thereby driving the first sun gear to rotate, and then causing the first planet gear to rotate by itself, thereby driving the first connecting rod 5 to rotate, realizing the diameter change, and changing the transmission ratio of the transmission belt.

[0041] Example 2

[0042] like Figure 5 As shown, the regulating structure 7 is a connecting ear 18, a second connecting rod 19 hinged to the connecting ear 18, a rocker 20 is hinged in the middle of the second connecting rod 19, and the rocker 20 is connected to the second power structure, which is a linear cylinder 21; a first rotating shaft 22 is axially connected in the middle of the rocker 20, and a second rotating shaft 23 is axially connected to the linear cylinder 21. In this way, the transmission ratio can be regulated by extending and retracting the linear cylinder 21.

[0043] The above is only a specific guiding implementation mode of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A variable diameter wheel structure, comprising a mounting shaft (1), characterized in that: The mounting shaft (1) is axially connected to a first sun gear (2), the outer circumference of the first sun gear (2) is meshed with no less than three first planetary gears (3), the first planetary gear (3) is axially connected to a first planetary carrier (4), and the first planetary carrier (4) is fixedly connected to the mounting shaft (1); the first planetary gear (3) is connected to a belt piece (6) via a first connecting rod (5) to form a variable diameter structure, the first sun gear (2) is connected to a second sun gear (8), the outer circumference of the second sun gear (8) is meshed with a second planetary gear (9), the second planetary gear (9) is axially connected to a second planetary carrier (17), and the second planetary carrier (17) is fixedly connected to the first planetary carrier (17). 17) a regulating structure (7) is formed on the periphery; a third sun gear (10) is fixed on the mounting shaft (1), and a third planet gear (11) is meshed with the outside of the third sun gear (10); the second sun gear (8) is the same size as the third sun gear (10), and the second planet gear (9) is the same size as the third planet gear (11); the second planet gear (9) and the third planet gear (11) are both meshed with an internal gear ring (12) on the outside; the second sun gear (8) is also sleeved on the mounting shaft (1); a connecting plate (15) is axially connected to the mounting shaft (1), and the third planet gear (11) is axially connected to the connecting plate (15).

2. The variable diameter wheel structure according to claim 1, characterized in that: The installation shaft (1) is connected to a first power structure, and the regulating structure (7) is connected to a second power structure.

3. The variable diameter wheel structure according to claim 1, characterized in that: The first connecting rod (5) is L-shaped.

4. The variable diameter wheel structure according to claim 1, characterized in that: A first planet carrier (4) is mounted on both sides of the first sun gear (2); a plurality of rotating shafts (13) are connected to the upper axis of the first planet carrier (4); and the first planet gear (3) is fixedly mounted on the rotating shaft (13).

5. The variable diameter wheel structure according to claim 1, characterized in that: The belt piece (6) is a smooth belt piece, a multi-ribbed belt piece, or a toothed belt piece.

6. The variable diameter wheel structure according to claim 1, characterized in that: The regulating structure (7) is a sprocket, a belt wheel or a connecting ear (18); and the belt piece (6) is an arc-shaped belt piece.

7. A continuously variable transmission, characterized in that: It comprises two variable diameter wheel structures as claimed in any one of claims 1 to 6, wherein the first connecting rods (5) of the two variable diameter wheel structures face opposite directions, and the regulating structure (7) is connected to the power structure through a transmission structure (16), and the transmission structure (16) is connected to the second power structure through gears; one of the two variable diameter wheel structures is connected to the first power structure; and the variable diameter structures of the two variable diameter wheel structures are connected to each other through a transmission belt.

8. The continuously variable transmission according to claim 7, characterized in that: The regulating structure (7) is a sprocket or a connecting ear (18); the transmission structure (16) is a chain or a second connecting rod (19) hinged to the connecting ear (18); a rocker (20) is hinged in the middle of the second connecting rod (19); the rocker (20) is connected to the second power structure; the first power structure is a motor, and the second power structure is a motor, a rotary cylinder or a linear cylinder (21).

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