A meshing method of variable diameter moving gear spur teeth and continuously variable transmission

Abstract

The present invention relates to a meshing method of variable diameter movable teeth and spur gears and a continuously variable transmission, belonging to the technical field of continuously variable transmission mechanisms. The meshing method of variable diameter movable teeth and spur gears is to associate two spur gear blocks with a set of seesaw structures to form a seesaw motion. When the movable gear is meshed with a fixed gear or a transmission gear chain, when one of the spur gear blocks interferes with the top teeth, the spur gear block is squeezed, thereby driving the seesaw structure, so that the other associated spur gear block extends out and meshes with the gear. A continuously variable transmission using this method is also disclosed. The continuously variable transmission has a fast response, no slipping, no power loss, and no setbacks, which overcomes the problems existing in the CVT transmission. At the same time, the present invention is smaller in size, has less power loss, higher transmission efficiency, and lower cost than an AT transmission.

Description

Technical Field

[0001] The invention discloses a meshing method of variable diameter moving teeth and spur teeth, which is an improvement on the existing meshing of fixed teeth gears. The diameter and moving teeth can be changed within a certain range to achieve constant meshing with other fixed gears. A continuously variable transmission for realizing the meshing method is also provided, which belongs to the technical field of continuously variable transmission mechanisms. Background Art

[0002] Ordinary gears with fixed gear ratios cannot be used in a continuously variable transmission to achieve constant meshing of gears.

[0003] The existing AT hydraulic continuously variable transmission appeared in the United States in the 1930s and 1940s. It uses a scheme that uses a stepped multi-speed transmission plus a hydraulic torque converter to achieve continuously variable speed. The role of ordinary fixed gears in the AT hydraulic continuously variable transmission is also to achieve step-by-step speed change, and the rest of the parts rely on hydraulic and hydraulic forces to achieve continuously variable speed change. AT continuously variable transmissions are mostly used in medium and large power transmissions. The structure is complex, the volume is large, the mechanical efficiency is low, the cost is high, but the power transmission is large. It is mostly used in large cars, tanks, trains, etc.

[0004] The existing movable tooth continuously variable transmission, i.e. the sliding plate deformation (HN-CVT) movable tooth meshing continuously variable transmission, is a movable tooth sliding plate group formed by overlapping steel plates, and the movable tooth sliding plate group is driven by the variable diameter telescopic control slider to mesh with the transmission chain. It is a non-friction transmission and normally meshing continuously variable transmission. The thickness, tension and strength of the steel plate affect the power and life. The chain transmission has a certain range and may have certain limitations when the power is high.

[0005] The existing CVT continuously variable transmission is realized by friction transmission such as wheels, belts, and chains, which has problems such as low power and easy "slipping" and power loss. From the initial belt to the current steel belt, the strength and performance have been improved to a certain extent, but the strength and transmission method directly affect the transmission efficiency and the maximum power is limited.

[0006] There are existing pulsating continuously variable transmissions that use multiple combinations of connecting rods and one-way clutches to achieve continuously variable speed changes, but they have low power, large size, complex structure, and are rarely used in high-torque working conditions. Summary of the invention

[0007] The purpose of the present invention is to solve the problems existing in the prior art, and to provide a meshing method of variable diameter moving teeth and spur teeth and a continuously variable transmission, which realize constant meshing continuously variable transmission by a non-friction transmission method, and can replace several groups of gears with one group of gears, thereby reducing operation, simplifying structure, and realizing large-ratio continuously variable transmission, and its maximum torque can reach the same conditions as fixed gears.

[0008] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0009] A meshing method of variable diameter movable spur gears, wherein the movable gear is composed of two spur gear blocks arranged in parallel with rolling teeth; the two spur gear blocks are connected by a set of seesaw structures, and each spur gear block is connected to the seesaw structure by two parallel oblique shafts; when the movable gear is meshed with a fixed gear or a transmission gear chain, when one of the spur gear blocks has an interfering top tooth, the spur gear block is squeezed, thereby driving the seesaw structure, so that the other associated spur gear block extends out and meshes with the gear; when a gap appears in the meshing, the spur gear block moves axially on the parallel axis until the tooth gap is eliminated.

[0010] A continuously variable transmission comprises a gear plate; the gear plate is provided with sliding grooves evenly distributed on the circular ring, and the sliding grooves are provided with movable gears that can slide with the movable gears; a transmission gear chain is meshed with the movable gears;

[0011] The movable gear comprises: a spur gear block I, a spur gear block II and a seesaw structure;

[0012] The seesaw structure comprises: a gear block base I, a gear block base II and a base; the base is a boss structure, comprising a plane I, a plane II and a boss; the gear block base I and the gear block base II are respectively arranged above the plane I and the plane II, and are connected to the seesaw through a seesaw shaft; the fulcrum of the seesaw is connected to the boss of the base through a pin shaft;

[0013] The gear block base I is provided with two pairs of coaxial oblique holes; the spur gear block I is connected to the gear block base I via an oblique shaft I;

[0014] The gear block base II is provided with two pairs of coaxial oblique holes; the spur gear block II is connected to the gear block base II via an oblique shaft II;

[0015] The seesaw axis is parallel to the pin axis;

[0016] Preferably, the spur gear block I and the spur gear block II are both provided with openings to prevent the two spur gear blocks from interfering with each other when the seesaw moves;

[0017] Preferably, the oblique axis I and the oblique axis II are not parallel to the axis of the seesaw shaft, and the projection angle on the horizontal plane is 0.5°-67.5°, so as to facilitate the axial movement of the spur gear block on the oblique axis;

[0018] Preferably, a gap is provided between the gear block base I and the gear block base II and the plane I and plane II of the base, so that the base limits the seesaw movement of the gear block base.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention arranges spur gear blocks I and II on a seesaw structure, so that when the movable gear is meshed with the transmission gear chain, when one of the spur gear blocks interferes with the top teeth, the spur gear block is squeezed, thereby driving the seesaw structure, so that the other associated spur gear block extends and meshes with the gear; the inclined axis I and the inclined axis II are arranged not parallel to the axis of the seesaw axis, so that when there is a gap in the meshing, the spur gear block moves axially on the inclined axis to eliminate the tooth gap, thereby effectively increasing the transmission torque. The continuously variable transmission disclosed by the present invention has fast response, no slipping, no power loss, no setbacks, and has the smoothness of the CVT gearbox while overcoming the problems of the CVT gearbox; at the same time, the present invention is smaller in size, has less power loss, has high transmission efficiency, and is low in cost than the AT transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the structure of the continuously variable transmission;

[0022] Figure 2 is a schematic diagram of the structure of the movable gear;

[0023] Figure 3 Schematic diagram of the seesaw structure.

[0024] Among them, 1-gear plate, 11-slide groove, 2-moving gear, 21-spur gear block I, 22-spur gear block II, 24-oblique axis I, 25-oblique axis II, 26-rocker axis, 27-pin shaft, 3-transmission gear chain, 231-tooth block base I, 232-tooth block base II, 233-base, 234-rocker. DETAILED DESCRIPTION

[0025] The following provides a preferred specific implementation of the present invention in conjunction with the accompanying drawings. What is disclosed is only a preferred specific implementation of the present invention, and it is certainly not intended to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

[0026] See Figure 1 As shown, the present invention discloses a meshing method of variable diameter movable teeth and spur teeth, wherein the movable gear 2 is composed of two spur tooth blocks arranged in parallel with rolling teeth; the two spur tooth blocks are associated by a set of seesaw structures, and each spur tooth block and the seesaw structure are connected by two parallel oblique axes; when the movable gear is meshed with the fixed gear or the transmission gear chain 3, when one of the spur tooth blocks has an interfering top tooth, the spur tooth block is squeezed, thereby driving the seesaw structure, so that the other associated spur tooth block extends out and meshes with the gear; when a gap occurs in the meshing, the spur tooth block moves axially on the parallel oblique axis until the tooth gap is eliminated.

[0027] Example 1

[0028] The present embodiment discloses a continuously variable transmission using a meshing method of variable diameter movable teeth and spur teeth, comprising a gear plate 1; the gear plate 1 is evenly distributed with four slide grooves 11 on a circular ring, each of which is provided with a movable gear 2 that can slide with the movable gear 2; a transmission gear chain 3 meshes with the movable gear 2;

[0029] See Figure 2 As shown, each of the movable gears 2 includes: a spur gear block I21, a spur gear block II22 and a seesaw structure; the spur gear block I21 and the spur gear block II22 are both spur gear blocks with 4 teeth and a module of 3;

[0030] See Figure 3 As shown, the seesaw structure includes: a gear block base I231, a gear block base II232 and a base 233; the base 233 is a boss structure, including a plane I, a plane II and a boss; the gear block base I231 and the gear block base II232 are respectively arranged above the plane I and the plane II, and are connected to the seesaw 234 through a seesaw shaft 26; the fulcrum of the seesaw 234 is connected to the boss of the base 233 through a pin 27;

[0031] The gear block base 1231 is provided with two pairs of coaxial oblique holes; the spur gear block 121 is connected to the gear block base 1231 via an oblique shaft 124;

[0032] The gear block base II232 is provided with two pairs of coaxial oblique holes; the spur gear block II22 is connected to the gear block base II232 via an oblique shaft II25;

[0033] The seesaw shaft 26 is parallel to the axis of the pin shaft 27;

[0034] As a preferred embodiment, further, the spur gear block I21 and the spur gear block II22 are both provided with rectangular openings to prevent the two spur gear blocks from interfering with each other when the seesaw moves;

[0035] As a preference, further, the oblique axis I24 and the oblique axis II25 are not parallel to the axis of the seesaw axis 26, and the projection on the horizontal plane forms an angle of 20°, so as to facilitate the axial movement of the spur gear block on the oblique axis;

[0036] Preferably, further, a gap of 0.3 mm is left between the gear block base I231 and the gear block base II232 and the plane I and plane II of the base 233, so that the base 233 limits the seesaw movement of the gear block base.

[0037] The gear plate 1 is connected to the power source device, and the driven device is driven to rotate through the engagement of the moving gear 2 and the transmission gear chain 3. The transmission torque of the continuously variable transmission provided in this embodiment is more than 3 times the transmission torque in the prior art, and the structure is simple and the power loss of the continuously variable transmission is extremely small.

[0038] While specific implementations of the present invention have been shown and described, it will be appreciated by those skilled in the art that numerous changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuously variable transmission, characterized in that: It comprises a gear plate (1); the gear plate (1) is evenly distributed with slide grooves (11) on a circular ring, and the slide grooves (11) are provided with movable gears (2) that can slide with the movable gears (2); a transmission gear chain (3) is meshed with the movable gears (2); The movable gear (2) comprises: a spur gear block I (21), a spur gear block II (22) and a seesaw structure; The seesaw structure comprises: a gear block base I (231), a gear block base II (232) and a base (233); the base (233) is a boss structure, comprising a plane I, a plane II and a boss; the gear block base I (231) and the gear block base II (232) are respectively arranged above the plane I and the plane II, and are connected to the seesaw (234) via a seesaw shaft (26); the fulcrum of the seesaw (234) is connected to the boss of the base (233) via a pin shaft (27); The gear block base I (231) is provided with two pairs of coaxial oblique holes; the spur gear block I (21) is connected to the gear block base I (231) via an oblique shaft I (24); The tooth block base II (232) is provided with two pairs of coaxial oblique holes; the spur tooth block II (22) is connected to the tooth block base II (232) via an oblique shaft II (25); The seesaw shaft (26) is parallel to the axis of the pin shaft (27).

2. A continuously variable transmission according to claim 1, characterized in that: The spur gear block I (21) and the spur gear block II (22) are both provided with openings.

3. A continuously variable transmission according to claim 1, characterized in that: The oblique axis I (24) and the oblique axis II (25) are not parallel to the axis of the seesaw axis (26), and the included angle of the projection on the horizontal plane is 0.5°-67.5°.

4. A continuously variable transmission according to claim 1, characterized in that: Gaps are provided between the tooth block base I (231) and the tooth block base II (232) and the plane I and plane II of the base (233).

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