阅读说明：本技术 一种传动比特性曲线可调的无级变速器 (Continuously variable transmission with adjustable transmission ratio characteristic curve ) 是由 伍怀秋 于 2021-08-25 设计创作，主要内容包括：本发明公开了一种传动比特性曲线可调的无级变速器,包括轴套、弹簧座、移动轮、滑动盖和弹簧,还包括摆臂、圆柱形滚轮、斜面导向块和偏心螺栓组件；所述摆臂的一端铰接在弹簧座上,摆臂的另一端与圆柱形滚轮连接；所述斜面导向块铰接在移动轮上；所述偏心螺栓组件包括偏心螺栓和螺母,斜面导向块的一侧靠在偏心圆柱段上,所述斜面导向块的另一侧设置有靠在圆柱形滚轮上的导向斜面。本发明传动比特性曲线可调的无级变速器,其能通过调节偏心螺栓的安装位置来改变变速器的传动比特性曲线,使得变速其能更好满足车辆在不同地区的行驶需求。(The invention discloses a continuously variable transmission with an adjustable transmission ratio characteristic curve, which comprises a shaft sleeve, a spring seat, a movable wheel, a sliding cover, a spring, a swing arm, a cylindrical roller, an inclined plane guide block and an eccentric bolt assembly, wherein the shaft sleeve is fixedly connected with the spring seat; one end of the swing arm is hinged to the spring seat, and the other end of the swing arm is connected with the cylindrical roller; the inclined guide block is hinged on the moving wheel; the eccentric bolt assembly comprises an eccentric bolt and a nut, one side of the inclined guide block leans against the eccentric cylindrical section, and the other side of the inclined guide block is provided with a guide inclined plane leaning against the cylindrical roller. The stepless speed changer with the adjustable transmission ratio characteristic curve can change the transmission ratio characteristic curve of the speed changer by adjusting the installation position of the eccentric bolt, so that the speed change can better meet the driving requirements of vehicles in different areas.)

1. The utility model provides a drive ratio characteristic curve adjustable continuously variable transmission, includes axle sleeve, spring holder, removal wheel, slip lid and spring, the spring holder is fixed at the axle sleeve middle part, remove the both sides that wheel and slip lid are located the spring holder, remove wheel and slip lid and overlap on the axle sleeve with the mode that can follow axial displacement, remove wheel and slip lid fixed connection, spring one end top is on the spring holder, and the other end top of spring is on the slip lid, its characterized in that: the device also comprises a swing arm, a cylindrical roller, an inclined plane guide block and an eccentric bolt assembly;

one end of the swing arm is hinged to the spring seat, and the other end of the swing arm is connected with the cylindrical roller;

the inclined guide block is hinged on the moving wheel;

the eccentric bolt assembly comprises an eccentric bolt and a nut, the eccentric bolt is provided with an eccentric cylindrical section, the moving wheel is provided with a hexagonal hole matched with the hexagonal head of the eccentric bolt, the eccentric bolt penetrates through the moving wheel, the head of the eccentric bolt is embedded in the hexagonal hole, and the other end of the eccentric bolt is connected with the nut;

one side of the inclined guide block leans against the eccentric cylindrical section, and the other side of the inclined guide block is provided with a guide inclined plane leaning against the cylindrical roller.

2. The transmission ratio characteristic curve-adjustable continuously variable transmission according to claim 1, characterized in that: the eccentric bolt is also sleeved with a locking spring, one end of the locking spring is propped against the nut, and the other end of the locking spring is propped against the movable wheel.

Technical Field

The invention relates to the technical field of transmissions, in particular to a continuously variable transmission.

Background

The motorcycle is a flexible vehicle and is widely used in mountainous regions and plains. However, the requirements of the motorcycle on the speed change performance of the continuously variable transmission are different when the motorcycle runs on mountainous regions and plain. For example, when a motorcycle often runs on a mountain land, the motorcycle is often started on an uphill road section, and at the moment, the torque required to be output by the continuously variable transmission at a low speed is large, so that the climbing requirement of the motorcycle can be ensured, therefore, the transmission ratio characteristic curve of the continuously variable transmission of the motorcycle commonly used on the mountain land is gentle, and the time consumption of the acceleration process from the low speed to the high speed is longer; when the vehicle frequently runs on flat ground, the requirements of the acceleration performance and the vehicle speed of the vehicle need to be met preferentially, so that the transmission ratio characteristic curve of the continuously variable transmission is steeper, and the time consumption of the acceleration process from low speed to high speed is shorter. However, as shown in fig. 1 of the specification, the installation positions and shapes of the arc-shaped flyer 1 and the cylindrical roller 2 for determining the transmission ratio characteristic curve of the conventional continuously variable transmission for motorcycles are not fixed and changeable, so that the transmission ratio characteristic curve of the continuously variable transmission is not adjustable, and further, the same continuously variable transmission cannot conveniently meet different speed change performance requirements when a vehicle runs on mountainous regions and flat lands.

Disclosure of Invention

In view of this, the present invention provides a continuously variable transmission with an adjustable transmission ratio characteristic curve, so as to solve the technical problem that the transmission ratio characteristic curve of the existing continuously variable transmission is not adjustable, so that the continuously variable transmission cannot conveniently meet different requirements of the vehicle on speed change performance when the vehicle runs on two different road conditions, namely, mountain land and flat land.

The stepless transmission with the adjustable transmission ratio characteristic curve comprises a shaft sleeve, a spring seat, a moving wheel, a sliding cover and a spring, wherein the spring seat is fixed in the middle of the shaft sleeve, the moving wheel and the sliding cover are positioned on two sides of the spring seat, the moving wheel and the sliding cover are sleeved on the shaft sleeve in an axial moving mode, the moving wheel and the sliding cover are fixedly connected, one end of the spring is propped against the spring seat, the other end of the spring is propped against the sliding cover, and the stepless transmission also comprises a swing arm, a cylindrical roller, an inclined guide block and an eccentric bolt assembly;

one end of the swing arm is hinged to the spring seat, and the other end of the swing arm is connected with the cylindrical roller;

the inclined guide block is hinged on the moving wheel;

the eccentric bolt assembly comprises an eccentric bolt and a nut, the eccentric bolt is provided with an eccentric cylindrical section, the moving wheel is provided with a hexagonal hole matched with the hexagonal head of the eccentric bolt, the eccentric bolt penetrates through the moving wheel, the head of the eccentric bolt is embedded in the hexagonal hole, and the other end of the eccentric bolt is connected with the nut;

one side of the inclined guide block leans against the eccentric cylindrical section, and the other side of the inclined guide block is provided with a guide inclined plane leaning against the cylindrical roller.

Furthermore, an anti-loosening spring is sleeved on the eccentric bolt, one end of the anti-loosening spring is propped against the nut, and the other end of the anti-loosening spring is propped against the movable wheel.

The invention has the beneficial effects that:

the invention relates to a continuously variable transmission with an adjustable transmission ratio characteristic curve, wherein the installation position of an eccentric bolt of the continuously variable transmission is adjustable. After the installation position of the eccentric bolt rotates for an angle, the angle of the eccentric cylindrical section on the eccentric bolt changes along with the rotation, so that the angle of the inclined guide block leaning against the eccentric cylindrical section changes, the angle of the guide inclined plane matched with the cylindrical roller changes in the speed changing process, and the transmission ratio characteristic curve of the speed changer changes. Therefore, when the motorcycle adopting the transmission runs mainly on mountainous regions, the position of the eccentric bolt can be changed to adjust the transmission ratio characteristic curve to be smooth, so that the output torque of the transmission is ensured, and the climbing performance of the transmission is met; when the motorcycle adopting the transmission runs mainly in a gentle terrain, the transmission ratio characteristic curve can be adjusted to be steeper by changing the position of the eccentric bolt, so that the vehicle can be quickly changed from low speed to high speed, and the acceleration performance of the vehicle is ensured.

Drawings

FIG. 1 is a schematic structural diagram of a prior art continuously variable transmission;

FIG. 2 is a schematic structural diagram of a continuously variable transmission with adjustable gear ratio characteristics;

FIG. 3 is a schematic view of the guide wheel engaging the guide slot;

FIG. 4 is a side view of the moving wheel;

FIG. 5 is a schematic structural view of an eccentric bolt;

fig. 6 is a schematic view of an eccentric bolt mounted on a moving wheel.

Detailed Description

The invention is further described below with reference to the figures and examples.

As shown in the figure, this embodiment continuously variable transmission with adjustable transmission ratio characteristic curve includes axle sleeve 3, spring holder 4, removes wheel 5, slip lid 6 and spring 7, the spring holder is fixed at the axle sleeve middle part, it is located the both sides of spring holder to remove wheel and slip lid, removes wheel and slip lid and overlaps on the axle sleeve with the mode that can follow axial displacement, removes wheel and slip lid fixed connection, spring one end top is on the spring holder, and the other end top of spring is on the slip lid. During shifting, the moving wheel and the sliding cover move simultaneously in the axial direction.

In the stepless speed changer with the adjustable transmission ratio characteristic curve, the moving wheel is further provided with a guide groove 8 which is parallel to the axial direction of the shaft sleeve, the spring seat is further provided with a guide wheel 9 which is in sliding fit with the guide groove, the moving wheel is guided to move along the axial direction through the matching of the guide wheel and the guide groove, and the moving wheel and the shaft sleeve can be prevented from rotating relatively.

The continuously variable transmission with the adjustable transmission ratio characteristic curve further comprises a swing arm 10, a cylindrical roller 11, a slope guide block 12 and an eccentric bolt assembly.

One end of the swing arm is hinged to the spring seat, and the other end of the swing arm is connected with the cylindrical roller through a bolt 13. Of course, in different embodiments, the bolt 13 may be replaced by other connecting elements in the form of rivets, pins, etc.

The inclined plane guide block is hinged to the movable wheel, and particularly the inclined plane guide block is sleeved on a pin shaft 14 which is arranged on the movable wheel.

The eccentric bolt assembly comprises an eccentric bolt 15 and a nut 16, wherein an eccentric cylindrical section 151 is arranged on the eccentric bolt, a hexagonal hole 51 matched with a hexagonal head 152 of the eccentric bolt is formed in the movable wheel, the eccentric bolt penetrates through the movable wheel, the head of the eccentric bolt is embedded in the hexagonal hole, and the other end of the eccentric bolt is connected with the nut. The hexagonal hole can prevent the eccentric bolt from rotating.

One side of the inclined guide block leans against the eccentric cylindrical section, and the other side of the inclined guide block is provided with a guide inclined surface 121 leaning against the cylindrical roller.

In the continuously variable transmission with the adjustable transmission ratio characteristic curve in the embodiment, the installation position of the eccentric bolt of the continuously variable transmission is adjustable. After the installation position of the eccentric bolt rotates for an angle, the angle of the eccentric cylindrical section on the eccentric bolt changes along with the rotation, so that the angle of the inclined guide block leaning against the eccentric cylindrical section changes, the angle of the guide inclined plane matched with the cylindrical roller changes in the speed changing process, and the transmission ratio characteristic curve of the speed changer changes. Therefore, when the motorcycle adopting the transmission runs mainly on mountainous regions, the position of the eccentric bolt can be changed to adjust the transmission ratio characteristic curve to be smooth, so that the output torque of the transmission is ensured, and the climbing performance of the transmission is met; when the motorcycle adopting the transmission runs mainly in a gentle terrain, the transmission ratio characteristic curve can be adjusted to be steeper by changing the position of the eccentric bolt, so that the vehicle can be quickly changed from low speed to high speed, and the acceleration performance of the vehicle is ensured.

As an improvement to the above embodiment, the eccentric bolt is further sleeved with a locking spring 17, one end of the locking spring is abutted against the nut, and the other end of the locking spring is abutted against the moving wheel. Can produce vibrations at the vehicle in-process of traveling, set up locking spring and can avoid the nut not hard up problem that drops under vibrations.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.