A novel three-dimensional automatic transmission for spherical umbrellas

Abstract

This utility model discloses a novel three-dimensional automatic transmission for a ball parachute, comprising a ball parachute friction assembly, a ball frame assembly, and an arc-surface friction assembly. The ball parachute friction assembly includes a drive shaft of a toothed arm support, a toothed arm support cover plate, a meshing arm, a ball frame sliding support, a ball frame sliding support cover plate, a spring, a connecting rod, and a meshing head. The toothed arm support is fixed on the drive shaft, the meshing arm and the toothed arm support are connected by a ball joint, the connecting rod and the meshing arm are connected by a pin, and the connecting rod and the ball frame sliding support are connected by a ball joint. This novel three-dimensional automatic transmission for a ball parachute has significant advantages such as smaller size, lighter weight, lower energy loss, smoother operation, larger speed ratio, and simpler maintenance.

Description

Technical Field

[0001] This utility model relates to the field of friction transmission technology, specifically to a novel spherical umbrella three-dimensional automatic transmission. Background Technology

[0002] Existing continuously variable transmissions (CVTs) mainly include mechanical CVTs and metal belt CVTs. Mechanical CVTs change speed by altering the distance between the chain and the conical pulleys; metal belt CVTs change speed by altering the rotation radius of the conveyor belt. Their main disadvantages are as follows:

[0003] 1. A complex automatic control system is needed to control the speed change process of the transmission. Mechanical continuously variable transmissions need to control the distance between the chain and the tapered pulley through the control system, while metal belt continuously variable transmissions need to control the rotation radius of the transmission belt through the control system. It is impossible to achieve the function of changing the transmission ratio by relying solely on mechanical motion.

[0004] 2. Existing transmission belts have complex structures, which increases the difficulty of manufacturing and maintenance.

[0005] 3. The size of the transmission is limited due to the curvature of the drive belt.

[0006] 4. Due to the principle of speed change, mechanical and continuously variable transmissions (CVTs) and metal belt CVTs have a relatively small speed range.

[0007] Therefore, a new transmission needs to be designed to solve the problems existing in the continuously variable transmission (CVT) mentioned above. Summary of the Invention

[0008] The purpose of this invention is to address the shortcomings of existing technologies and provide a novel three-dimensional automatic transmission for spherical umbrellas, which can solve the problems in existing power transmission processes.

[0009] The objective of this utility model is achieved through the following technical solution:

[0010] A novel three-dimensional automatic transmission for parachutes is provided, comprising at least one parachute friction assembly and at least one parachute frame assembly and an arc-shaped friction assembly corresponding to the parachute friction assembly; the parachute friction assembly includes a drive shaft with a toothed arm support, a toothed arm support cover plate, meshing arms spaced circumferentially along the toothed arm support, a parachute frame sliding support mounted on the drive shaft, a parachute frame sliding support cover plate, a spring connecting the toothed arm support and the parachute frame sliding support, a connecting rod connecting the meshing arms and the parachute frame sliding support, and a meshing head mounted on the top of the meshing arms; the toothed arm support is fixed to... On the drive shaft, the meshing arm and the gear lever arm support are connected by ball joints, the connecting rod and the meshing arm are connected by pins, and the connecting rod and the umbrella frame sliding support are connected by ball joints; the ball frame assembly includes a ball frame support, ball frame groove beams arranged circumferentially along the ball frame support, a ball frame support cover plate fixed on the ball frame support, and a ball frame positioning ring connected to the other end of the ball frame groove beam. The ball frame assembly is connected to the drive shaft by a key and can rotate with the drive shaft; the arc surface friction assembly includes a driven shaft and a friction cone, the generatrix of which is an arc drawn by the trajectory of the outer contact surface of the meshing head.

[0011] The possible arrangements include:

[0012] 1. A ball-shaped friction assembly is provided, and an arc-shaped friction assembly is provided. The engagement head of the ball-shaped friction assembly contacts the outer curved surface of the frustum of the arc-shaped friction assembly. When the new ball-shaped three-dimensional automatic transmission is working, the engagement head of the ball-shaped friction assembly and the outer curved surface of the frustum of the arc-shaped friction assembly transmit power through friction.

[0013] 2. There is one ball-and-umbrella friction assembly and multiple arc-surface friction assemblies. The arc-surface friction assemblies are evenly distributed around the circumference of the ball-and-umbrella friction assembly, and the frustum of each arc-surface friction assembly contacts the engagement head of the ball-and-umbrella friction assembly. When the new ball-and-umbrella three-dimensional automatic transmission is working, the engagement head of the ball-and-umbrella friction assembly rubs against the outer curved surface of the frustum of each arc-surface friction assembly, transmitting the power of the ball-and-umbrella friction assembly to the other arc-surface friction assemblies, thus achieving uniform power distribution.

[0014] 3. Multiple ball-and-umbrella friction components and one arc-surface friction component are provided. The ball-and-umbrella friction components are evenly distributed around the arc-surface friction component in the circumferential direction, and the engagement head of each ball-and-umbrella friction component contacts the frustum of the arc-surface friction component. When the new ball-and-umbrella three-dimensional automatic transmission is working, the outer curved surface of the frustum of the arc-surface friction component rubs against the engagement head of the ball-and-umbrella friction component, transmitting power from the multiple ball-and-umbrella friction components to the arc-surface friction component, thus achieving power coupling.

[0015] The gear arm support is mounted on the drive shaft and fixedly connected to it. The gear arm support has a first hemispherical groove along its circumferential direction to hold the gear arm, and is then fixed with a gear arm support cover plate, allowing the gear arm to rotate within the groove.

[0016] The ball umbrella friction assembly includes a toothed arm, one end of which is spherical and installed in the ball groove of the toothed arm support; the other end of the toothed arm is equipped with a meshing head for frictional contact with the frustum of the arc surface friction assembly; a track groove is opened on one side of the toothed arm for placing the connecting rods and allowing each connecting rod to rotate therein; a connecting pin groove is opened in the middle of the side of the toothed arm with the groove for installing the connecting pin connected to the connecting rod.

[0017] The ball umbrella friction assembly also includes a meshing head. The meshing head is mounted on the meshing arms, and an elastic element is installed between the meshing arms to ensure a certain degree of elasticity between them. The other side is a friction surface that contacts the frustum of the arc-shaped friction assembly, causing the frustum to rotate through friction.

[0018] The umbrella friction assembly also includes a spring. The spring is installed between the gear arm support on the drive shaft and the sliding support of the umbrella frame, providing elastic force to the sliding support of the umbrella frame.

[0019] The umbrella friction assembly also includes an umbrella frame sliding support. The umbrella frame sliding support has a through hole in its center, through which the drive shaft passes, allowing the umbrella frame sliding support to move on the drive shaft. The umbrella frame sliding support has a hemispherical groove for connecting to a connecting rod.

[0020] The umbrella friction assembly also includes a connecting rod. One end of the connecting rod is connected to a pin groove and then to a geared arm. The other end is spherical and is mounted on a hemispherical groove in the umbrella frame sliding support, forming a ball joint.

[0021] The ball frame assembly includes a ball frame support, ball frame groove beams arranged circumferentially along the ball frame support, a ball frame support cover plate fixed on the ball frame support, and a ball frame positioning ring connected to the other end of the ball frame groove beam. The ball frame assembly is connected to the drive shaft via a key. The grooves on the ball frame groove beam of the ball frame assembly correspond one-to-one with the engagement arms, which are used to restrict the movement of the engagement arms and allow the engagement arms to move in the ball frame groove beam.

[0022] The arc-surface friction assembly includes a driven shaft and a frustum. The generatrix of the frustum coincides with the motion trajectory of the engagement head. A through hole is formed in the middle of the frustum, through which the driven shaft passes, and the frustum and driven shaft are fixedly connected by a key. The generatrix of the frustum coincides with the motion trajectory of the engagement head in the ball-and-umbrella friction assembly.

[0023] The working process of the novel spherical umbrella three-dimensional automatic transmission of this utility model is as follows: the drive shaft rotates, which drives the toothed arm support to rotate. At the same time, the toothed arm support rotates, which drives the meshing arm to rotate around the drive shaft. Due to the centrifugal force, the meshing arm changes from a retracted state to an open state. During the opening process, the meshing head contacts and rubs against the cone, thereby driving the cone to rotate and realizing friction transmission.

[0024] Compared with existing technologies, the centrifugal force generated by the rotation of the gear arm is used to open the gear arm, thereby transforming the ball umbrella friction component into a variable transmission ratio component, realizing friction transmission with the truncated cone. It has significant advantages such as smaller size, lower energy loss, smoother operation, larger transmission ratio range, and simpler maintenance. Attached Figure Description

[0025] Figure 1 is a top view of the novel spherical umbrella three-dimensional automatic transmission in Example 1 in a stationary state;

[0026] Figure 2 is a cross-sectional view of the novel ball umbrella three-dimensional automatic transmission ball umbrella friction assembly and umbrella frame assembly in Example 1;

[0027] Figure 3 is a top view of the ball-and-canopy friction assembly of the novel ball-and-canopy three-dimensional automatic transmission in Example 1;

[0028] Figure 4 shows the top view and AA section view of the novel ball umbrella three-dimensional automatic transmission umbrella frame assembly in Example 1;

[0029] Figure 5 is a top view of the arc-shaped friction component of the novel spherical umbrella three-dimensional automatic transmission in Example 1;

[0030] Figure 6 shows the front view, side view, and isometric view of the drive shaft and gear arm support of the novel spherical umbrella three-dimensional automatic transmission in Example 1.

[0031] Reference numerals: drive shaft 001, gear arm support 002, gear arm support cover plate 003, meshing arm 004.

[0032] Linkage 005, engagement head 006, umbrella frame sliding support 007, umbrella frame sliding support cover plate 008, ball frame support 009, ball frame support cover plate 010, ball frame groove beam 011, ball frame positioning ring 012, driven shaft 013, arc-shaped cone 014, ball umbrella friction assembly 101, umbrella frame assembly 102, arc surface friction assembly 103. Detailed Implementation

[0033] The present invention will be further described in conjunction with the following embodiments.

[0034] Example 1

[0035] One specific embodiment of the novel spherical umbrella three-dimensional automatic transmission of this utility model is shown in Figure 1- Figure 2 It includes a ball-and-umbrella friction assembly, a ball-and-frame assembly, and an arc-surface friction assembly. This embodiment is illustrated by taking its application in a transmission as an example. The ball-and-umbrella friction assembly and the arc-surface friction assembly are arranged opposite to each other.

[0036] In this embodiment, the engagement head 006 and the truncated cone 014 make frictional contact with each other to transmit power. When the novel spherical umbrella three-dimensional automatic transmission is working, the drive shaft 001 rotates, driving the gear arm support 002 to rotate, which in turn drives the gear arm 004 to rotate. The engagement head 006 on the gear arm 004 makes frictional contact with the truncated cone 014, generating frictional force, which drives the truncated cone 014 to rotate, and then drives the driven shaft 013 to rotate, completing the power transmission process.

[0037] In this embodiment, when the toothed arm support 002 rotates, it drives the meshing arm 004 to rotate. The rotation of the meshing arm 004 generates centrifugal force, which is transmitted to the umbrella frame sliding support 007 via the connecting rod 005. The umbrella frame sliding support 007 compresses the spring, causing the meshing arm 004 to open, resulting in a change in the transmission ratio. After a period of time, the centrifugal force and the spring elastic force balance, maintaining a constant transmission ratio. Clearly, as the rotational speed of the toothed arm support 002 increases, the opening angle of the meshing arm 004 also increases. This opening angle is limited by the structure of the umbrella frame slot beam 011, ensuring a range of 15~70°.

[0038] In this embodiment, the spherical umbrella friction assembly 101 includes a drive shaft 001 and a toothed arm support 002. The toothed arm support 002 has a hemispherical groove along the circumferential direction for placing the meshing arm 004. In practical applications, a revolute pair is formed between the toothed arm support 002 and the meshing arm 004 to ensure the opening and closing process of the meshing arm 004.

[0039] In this embodiment, the ball frame assembly 1002 includes a ball frame support 009, ball frame channel beams 011 arranged circumferentially along the ball frame support 009, a ball frame support cover plate 010 fixed on the ball frame support 009, and a ball frame positioning ring 012 connected to the other end of the ball frame channel beam 010. The ball frame assembly 1002 is connected to the drive shaft 001 via a key. The grooves on the ball frame channel beam 010 of the ball frame assembly 1002 correspond one-to-one with the engagement arms 004, which are used to restrict the movement of the engagement arms 004, so that the engagement arms 004 move in the ball frame channel beam 010.

[0040] In this embodiment, the ball umbrella friction assembly 101 includes a meshing arm 004. One end of the meshing arm 004 is spherical, and the other end is used to connect to the meshing head 006. A groove for placing the connecting rod 005 is formed in the middle of the meshing arm 004.

[0041] The gear arm support 002 and the gear arm 004, and the gear arm 004 and the connecting rod 005 form a rotary pair. It is necessary to ensure that the opening angle between the connecting rod 005 and the gear arm 004 is kept within a certain range to meet the requirements of the opening and closing process of the gear arm 004.

[0042] In this embodiment, the ball umbrella friction assembly 101 includes a biting head 006. One end of the biting head 006 is mounted on the meshing arm 004, and the other end makes frictional contact with the frustum 014 of the arc surface friction assembly 102. The friction surface of the biting head 006 is spherical to ensure sufficient contact area with the frustum 014. An elastic component should be provided between the biting head 006 and the meshing arm 004 to ensure that the biting head 006 can be buffered when in contact with the frustum 014, reducing system impact.

[0043] In this embodiment, the umbrella friction assembly 101 includes a connecting rod 005. One end of the connecting rod 005 has a connecting pin groove, and the other end is spherical. The connecting pin groove is used to place the connecting pin connecting the connecting rod 005 and the meshing arm 004. The connection between the spherical part of the connecting rod 005 and the umbrella frame sliding support 007 forms a ball joint.

[0044] In this embodiment, the umbrella friction assembly 101 includes an umbrella frame sliding support 007 and an umbrella frame sliding support cover plate 008. The umbrella frame sliding support 007 has a through hole in its center, through which it is mounted on the drive shaft. In practical applications, the structure of the umbrella frame sliding support 007 can be changed according to the specific application, but it must still be ensured that the umbrella frame sliding support 007 can move on the drive shaft 001 and form a rotating pair with the connecting rod 005.

[0045] In this embodiment, the arc friction assembly 103 includes a frustum 014, which is fixed to the driven shaft 013. A through hole is formed in the center of the frustum 014, through which the frustum 014 is mounted on the driven shaft. The generatrix of the frustum 014 is an arc and coincides with the movement trajectory of the engagement head 006, ensuring good contact between the engagement head and the frustum 014 under different opening angles of the engagement arm 004. This guarantees the normal operation of the novel spherical umbrella three-dimensional automatic transmission under different gear ratios.

[0046] The drive shaft 001, meshing arm 004, connecting rod 005, and parachute frame sliding support 007 form a crank-slider system. Through the ball frame groove beam 011, the angle of the meshing arm 004 can be limited between 15 and 70 degrees, ensuring normal power transmission of the new ball-and-parachute three-dimensional automatic transmission, and its transmission ratio range is wider than that of traditional continuously variable transmissions (CVTs). Simultaneously, the spring installed on the drive shaft, through compression, generates a reaction force on the parachute frame sliding support 007, balancing the force on the parachute frame sliding support 007 in the axial direction of the drive shaft 001. This ensures the consistency of the transmission ratio of the new ball-and-parachute three-dimensional automatic transmission under stable external input signals. Furthermore, the variable transmission ratio function of the new ball-and-parachute three-dimensional automatic transmission does not require an external control system; it achieves changes in transmission ratio through its own force balance. Compared to other CVTs, it eliminates the need for a complex control system, ensuring the stability of the new ball-and-parachute three-dimensional automatic transmission.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A novel three-dimensional automatic transmission for spherical umbrellas, characterized in that: This includes the ball umbrella friction assembly, the ball frame assembly, and the arc surface friction assembly; The umbrella friction assembly includes a drive shaft with a toothed arm support, a toothed arm support cover plate, toothed arms spaced apart circumferentially along the toothed arm support, an umbrella frame sliding support mounted on the drive shaft, an umbrella frame sliding support cover plate, a spring connecting the toothed arm support and the umbrella frame sliding support, a connecting rod connecting the toothed arms and the umbrella frame sliding support, and a meshing head mounted on the top of the toothed arms. The toothed arm support is fixed on the drive shaft, the toothed arms and the toothed arm support are connected by a ball joint, the connecting rod and the toothed arms are connected by a pin, and the connecting rod and the umbrella frame sliding support are connected by a ball joint. The ball frame assembly includes a ball frame support, ball frame channel beams arranged circumferentially along the ball frame support, a ball frame support cover plate fixed on the ball frame support, and a ball frame positioning ring connected to the other end of the ball frame channel beam. The ball frame assembly is connected to the drive shaft via a key and can rotate with the drive shaft to limit the movement of the engagement arm and allow the engagement arm to move in the ball frame channel beam. The arc-shaped friction assembly includes a frustum and a driven shaft, with the frustum fixed on the driven shaft. The frustum is in frictional contact with the engagement head of the ball-and-umbrella friction assembly. When the engagement head rotates, it drives the frustum to rotate, which in turn drives the driven shaft to rotate. When the drive shaft rotates, it drives the toothed arm support to rotate, which in turn drives the toothed arm to rotate. The engagement head on the toothed arm is in frictional contact with the frustum of the arc-shaped friction assembly.

2. The novel spherical umbrella three-dimensional automatic transmission according to claim 1, characterized in that: The ball umbrella friction assembly includes a drive shaft, a gear arm support fixed to one side of the drive shaft, and a sliding support for the umbrella frame freely placed on the other side of the drive shaft. A spring is placed between the gear arm support and the sliding support for the umbrella frame. When the drive shaft rotates, it drives the gear arm to rotate, generating centrifugal force. The centrifugal force is transmitted to the sliding support for the umbrella frame through a connecting rod. The sliding support for the umbrella frame compresses the spring, causing the spring to deform and generate a reaction force on the sliding support for the umbrella frame. Under the combined action of the reaction force and the centrifugal force, the sliding support for the umbrella frame reaches a state of equilibrium. Due to the displacement of the sliding support for the umbrella frame, the opening and closing angle of the gear arm changes, thus changing the transmission ratio of the new ball umbrella three-dimensional automatic transmission.

3. The novel spherical umbrella three-dimensional automatic transmission according to claim 1, characterized in that: The ball umbrella friction assembly includes a drive shaft and a toothed arm support; the toothed arm support is mounted on the drive shaft and fixedly connected to the drive shaft; the toothed arm support has a first hemispherical groove along its circumferential direction for placing the toothed arm, and then is fixed with a toothed arm support cover plate so that the toothed arm can rotate in the ball groove.

4. The novel spherical umbrella three-dimensional automatic transmission according to claim 1, characterized in that: The grooves on the ball frame slot beam of the ball frame assembly correspond one-to-one with the meshing arms.

5. The novel spherical umbrella three-dimensional automatic transmission according to claim 1, characterized in that: The ball umbrella friction assembly includes a toothed arm, one end of which is spherical and installed in the ball groove of the toothed arm support; the other end of the toothed arm is equipped with a meshing head for frictional contact with the frustum of the arc surface friction assembly; a track groove is opened on one side of the toothed arm for placing the connecting rods and allowing each connecting rod to rotate therein; a connecting pin groove is opened in the middle of the side of the toothed arm with the groove for installing the connecting pin connected to the connecting rod.

6. The novel spherical umbrella three-dimensional automatic transmission according to claim 1, characterized in that: The ball umbrella friction assembly also includes a biting head; the biting head is installed on the meshing arm and an elastic element is installed between the meshing arms to ensure that there is a certain elasticity between the two; the other side is a friction surface, which contacts the cone of the arc surface friction assembly and drives the cone to rotate through friction.

7. The novel spherical umbrella three-dimensional automatic transmission according to claim 2, characterized in that: The umbrella friction assembly also includes a spring; the spring is installed between the gear arm support on the drive shaft and the umbrella frame sliding support, providing elastic force to the umbrella frame sliding support.

8. The novel spherical umbrella three-dimensional automatic transmission according to claim 2, characterized in that: The ball umbrella friction assembly also includes an umbrella frame sliding support; the umbrella frame sliding support has a through hole in the middle, through which the drive shaft passes and allows the umbrella frame sliding support to move on the drive shaft; the umbrella frame sliding support has a hemispherical groove for connecting to the connecting rod.

9. The novel spherical umbrella three-dimensional automatic transmission according to claim 5, characterized in that: The umbrella friction assembly also includes a connecting rod; one end of the connecting rod is connected to a pin groove and connected to a gear arm; the other end is spherical and is installed on the hemispherical groove of the umbrella frame sliding support to form a ball joint.

10. The novel spherical umbrella-style three-dimensional automatic transmission according to claim 1, characterized in that: The arc-shaped friction assembly includes a driven shaft and a cone; the generatrix of the cone coincides with the movement trajectory of the engagement head, and a through hole is opened in the middle of the cone. The driven shaft passes through the cone through the through hole, and the cone and the driven shaft are fixedly connected by a key.

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