Steering mechanism of a bicycle and components used to constitute the steering mechanism

Abstract

This invention discloses a steering device for a bicycle and components for constituting the steering device. The bicycle steering device includes a driven hydraulic cylinder, a first driven hydraulic cylinder, a second driven hydraulic cylinder, and an oil circuit system. The driven hydraulic cylinder is used to receive the drive of the handlebar of the bicycle. The first and second driven hydraulic cylinders are used to drive the front fork of the bicycle to rotate. The oil circuit system provides a flow path for hydraulic oil, allowing hydraulic oil to enter or leave the driven hydraulic cylinder, the first driven hydraulic cylinder, and the second driven hydraulic cylinder. Operating the handlebar can control the front fork to move through the bicycle steering device, thereby changing the direction of travel of the bicycle.

Description

Technical Field

[0001] This invention relates to a steering system for a bicycle; in particular, it relates to a steering device for a bicycle and an innovative structure for the components constituting said steering device. Background Technology

[0002] A cargo transport vehicle has a cargo box for carrying goods located on the front side of the handlebars. The cargo box extends forward in a long shape, and the front wheel of the vehicle is located on the front side of the cargo box. A steering mechanism connects the handlebars and the front fork for mounting the front wheel. The rider controls the handlebars, and the handlebars drive the front fork through the steering mechanism, thereby changing the direction of travel of the vehicle.

[0003] Steering systems can be broadly classified into two types based on their transmission methods: cable-driven and multi-link-driven. Cable-driven steering systems mainly consist of components such as cables, pulleys, and steering wheels. The steering wheel drives the fork to rotate via the cable. Because cables are elastic, they require regular maintenance and adjustment to prevent them from gradually elongating and deforming due to repeated tension, which could create gaps that affect the effective drive of the fork. Multi-link-driven steering systems are mainly composed of multiple links, making their structure more complex. Summary of the Invention

[0004] The main objective of this invention is to provide a steering device for a motorcycle and components for constituting the steering device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A steering mechanism for a bicycle, comprising:

[0007] A driven hydraulic cylinder is connected to the steering rod of the handlebars of the bicycle, and the driven hydraulic cylinder is driven by the steering rod.

[0008] A first driven hydraulic cylinder is coupled to the front fork of the bicycle. The first driven hydraulic cylinder drives the front fork to rotate. The cylinder diameter of the first driven hydraulic cylinder is defined as the first cylinder diameter.

[0009] A second driven hydraulic cylinder is coupled to the front fork. The second driven hydraulic cylinder drives the front fork to rotate. The cylinder diameter of the second driven hydraulic cylinder is defined as the second cylinder diameter, and the second cylinder diameter is larger than the first cylinder diameter.

[0010] A hydraulic circuit system includes several oil passages, several oil reservoirs, and at least one oil passage switching valve. Each oil passage forms a flow path for hydraulic oil, which enters or leaves the driven hydraulic cylinder, the first driven hydraulic cylinder, and the second driven hydraulic cylinder. The oil passage switching valve is located in a selected oil passage. Each oil reservoir is connected to the corresponding oil passage switching valve. Each oil reservoir is used to collect and release hydraulic oil, thereby changing the connection relationship between the first driven hydraulic cylinder or the second driven hydraulic cylinder and each oil reservoir.

[0011] A steering mechanism for a bicycle, comprising:

[0012] A driven hydraulic cylinder is used to connect to the steering rod of the handlebars of a bicycle, so that the driven hydraulic cylinder can bear the drive of the steering rod.

[0013] A first driven hydraulic cylinder is used to couple to the front fork of the bicycle, so as to drive the front fork to rotate. The cylinder diameter of the first driven hydraulic cylinder is defined as the first cylinder diameter.

[0014] A second driven hydraulic cylinder is used to couple to the front fork, and is configured to drive the front fork to rotate. The cylinder diameter of the second driven hydraulic cylinder is defined as a second cylinder diameter, and the second cylinder diameter is larger than the first cylinder diameter; and

[0015] A hydraulic circuit system includes a fifth oil passage, a sixth oil passage, a seventh oil passage, a fifth oil reservoir, a sixth oil reservoir, and a five-port two-position valve. The fifth, sixth, and seventh oil passages form the flow paths of hydraulic oil. The fifth oil passage connects the driven hydraulic cylinder and the five-port two-position valve. The sixth oil passage connects the first driven hydraulic cylinder and the five-port two-position valve. The seventh oil passage connects the second driven hydraulic cylinder and the five-port two-position valve. The fifth and sixth oil reservoirs are used to collect and release hydraulic oil, respectively. The fifth and sixth oil reservoirs are connected to the five-port two-position valve, thereby changing the connection relationship between the first or second driven hydraulic cylinder and the fifth, sixth, and driven hydraulic cylinders.

[0016] An assembly for constituting a steering device of a bicycle, the assembly being configured to cooperate with a driven hydraulic cylinder and a first driven hydraulic cylinder, thereby constituting the steering device.

[0017] The driven hydraulic cylinder is connected to the rudder of the handlebar of the bicycle and is driven by the rudder. The first driven hydraulic cylinder is coupled to the front fork of the bicycle and drives the front fork to rotate. The cylinder diameter of the first driven hydraulic cylinder is defined as the first cylinder diameter.

[0018] The components include:

[0019] A second driven hydraulic cylinder is coupled to the front fork. The second driven hydraulic cylinder drives the front fork to rotate. The cylinder diameter of the second driven hydraulic cylinder is defined as the second cylinder diameter, and the second cylinder diameter is larger than the first cylinder diameter.

[0020] A hydraulic circuit system is used to connect the driven hydraulic cylinder, the first driven hydraulic cylinder, and the second driven hydraulic cylinder;

[0021] The hydraulic system includes several oil passages, several oil reservoirs, and at least one oil passage switching valve. Each oil passage forms a flow path for hydraulic oil, which enters or leaves the driven hydraulic cylinder, the first driven hydraulic cylinder, and the second driven hydraulic cylinder. The oil passage switching valve is located in a selected oil passage. Each oil reservoir is connected to the corresponding oil passage switching valve. Each oil reservoir is used to collect and release hydraulic oil, thereby changing the connection relationship between the first driven hydraulic cylinder or the second driven hydraulic cylinder and each oil reservoir.

[0022] The present invention is easier to set up and maintain than conventional cable-driven steering systems, and its overall structure is simpler than that of conventional multi-link steering systems.

[0023] Furthermore, by selecting the connection state of the oil passage switching valve, this invention allows the rider to quickly and significantly change the direction of the vehicle under a light load, which is beneficial for maneuvering the vehicle to avoid obstacles or potholes on the road. Under a heavier load, it prevents the rider from changing the direction of the vehicle significantly in a short period of time, which helps to avoid lateral rollovers caused by excessive steering angles. Attached Figure Description

[0024] Figure 1 This is a system configuration diagram of a first embodiment of the steering device of the bicycle of the present invention.

[0025] Figure 2 This is a schematic diagram of the operation state of a first embodiment of the steering device of the bicycle of the present invention, showing the state of controlling the front fork of the bicycle to turn right.

[0026] Figure 3 This is a schematic diagram of the operation state of a first embodiment of the steering device of the bicycle of the present invention, showing the state of controlling the front fork of the bicycle to turn left.

[0027] Figure 4 This is a schematic diagram of another operating state of the steering device of the bicycle according to Embodiment 1 of the present invention, showing the state of controlling the front fork of the bicycle to turn right.

[0028] Figure 5 This is a schematic diagram of another operating state of the steering device of the bicycle according to Embodiment 1 of the present invention, showing the state of controlling the front fork of the bicycle to turn left.

[0029] Figure 6 This is a perspective view of the configuration state of the controller of a first embodiment of the steering device of the bicycle of the present invention.

[0030] Figure 7 This is an exploded perspective view of the controller of a first embodiment of the steering device of the bicycle of the present invention.

[0031] Figure 8This is a system configuration diagram of a modified embodiment of the steering device of the bicycle of the present invention.

[0032] Figure 9 This is a system configuration diagram of a second embodiment of the steering device of the bicycle of the present invention.

[0033] Figure 10 This is a schematic diagram of the operation state of a second embodiment of the steering device of the bicycle of the present invention, showing the state of controlling the front fork of the bicycle to turn right.

[0034] Figure 11 This is a schematic diagram of the operation state of a second embodiment of the steering device of the bicycle of the present invention, showing the state of controlling the front fork of the bicycle to turn left.

[0035] Figure 12 This is a schematic diagram of another operating state of the steering device of the bicycle according to Embodiment 2 of the present invention, showing the state of controlling the front fork of the bicycle to turn right.

[0036] Figure 13 This is a schematic diagram of another operating state of the steering device of the bicycle according to Embodiment 2 of the present invention, showing the state of controlling the front fork of the bicycle to turn left. Detailed Implementation

[0037] Please refer to the figures shown, which illustrate an embodiment of the steering device for the bicycle of the present invention. However, these embodiments are for illustrative purposes only and are not limited to this structure in the patent application.

[0038] The riding vehicle described in this invention refers to a means of transportation such as a bicycle or motorcycle that provides a user with a means of transportation to drive by riding. The riding vehicle can be a two-wheeled vehicle or a three-wheeled vehicle. The steering device of the riding vehicle is used to connect the handlebars and the front fork of the riding vehicle. The front wheel of the riding vehicle can be controlled by operating the handlebars, thereby controlling and changing the direction of the riding vehicle.

[0039] like Figures 1 to 7 As shown, one embodiment of the steering device of the motorcycle includes a driven hydraulic cylinder 10, a first driven hydraulic cylinder 20, a second driven hydraulic cylinder 30, and an oil circuit system 40, wherein the driven hydraulic cylinder 10 is connected to the rudder 91 of the handlebars of the motorcycle. When the user rotates the rudder stick 91, the driven hydraulic cylinder 10 is driven by the rudder stick 91. The first driven hydraulic cylinder 20 is coupled to the front fork 93 of the bicycle, which is used to control the rolling direction of the front wheel 92. The first driven hydraulic cylinder 20 drives the front fork 93 to rotate, thereby changing the riding direction of the bicycle. The cylinder diameter of the first driven hydraulic cylinder 20 is defined as the first cylinder diameter. The second driven hydraulic cylinder 30 is coupled to the front fork 93. The second driven hydraulic cylinder 30 drives the front fork 93 to rotate, thereby changing the riding direction of the bicycle. The cylinder diameter of the second driven hydraulic cylinder 30 is defined as the second cylinder diameter, and the second cylinder diameter is larger than the first cylinder diameter. It is a better implementation choice for the cylinder diameter of the driven hydraulic cylinder 10 to be the same as the first cylinder diameter of the first driven hydraulic cylinder 20.

[0040] The hydraulic circuit system 40 includes several oil passages, several oil reservoirs, and several oil passage switching valves. Each oil passage forms a flow path for hydraulic oil, allowing hydraulic oil to enter or leave the driven hydraulic cylinder 10, the first driven hydraulic cylinder 20, and the second driven hydraulic cylinder 30. Each oil passage switching valve is located in a selected oil passage. Each oil reservoir is connected to a corresponding oil passage switching valve. Each oil reservoir is used to collect and release hydraulic oil, thereby changing the connection relationship between the first driven hydraulic cylinder 20 or the second driven hydraulic cylinder 30 and the corresponding oil reservoirs. Each oil passage is constructed from a flexible hydraulic hose, and each oil reservoir is constructed from a variable-volume oil reservoir.

[0041] When turning the bicycle, the steering lever 91 is rotated, the driven hydraulic cylinder 10 is braked by the steering lever 91, and the hydraulic oil is transmitted through the oil circuit system 40 to drive the first driven hydraulic cylinder 20 and the second driven hydraulic cylinder 30 to drive the front fork 93 to rotate, thereby changing the direction of travel of the bicycle. The steering lever 91 can reliably and effectively cause the front fork 93 to rotate through the present invention. The setup and daily maintenance of the present invention are easier than conventional cable-driven steering systems, and the overall structure of the present invention is simpler than conventional multi-link driven steering systems.

[0042] Specifically, the driven hydraulic cylinder 10 has a first piston rod 12, which is pivotally connected to the rudder rod 91. The rudder rod 91 actuates the first piston rod 12 to reciprocate axially. The first driven hydraulic cylinder 20 has a second piston rod 22, which drives the front fork 93 to rotate. The second driven hydraulic cylinder 30 has a third piston rod 32, which drives the front fork 93 to rotate.

[0043] The driven hydraulic cylinder 10, the first driven hydraulic cylinder 20 and the second driven hydraulic cylinder 30 are selected as double-driven hydraulic cylinders. The double-driven hydraulic cylinder refers to a hydraulic cylinder with two chambers. The hydraulic oil forms pressure on both sides of the piston. By changing the flow direction of the hydraulic oil, the piston is made to reciprocate.

[0044] Each oil passage is defined as the first oil passage 41, the second oil passage 42, the third oil passage 43 and the fourth oil passage 44, respectively. Each oil reservoir is defined as the first oil reservoir 51, the second oil reservoir 52, the third oil reservoir 53 and the fourth oil reservoir 54, respectively. Each oil passage switching valve is a three-port two-position valve, and each oil passage switching valve is defined as the first oil passage switching valve 61, the second oil passage switching valve 62, the third oil passage switching valve 63 and the fourth oil passage switching valve 64, respectively.

[0045] The first oil passage 41 connects the driven hydraulic cylinder 10 and the first driven hydraulic cylinder 20; the second oil passage 42 connects the first oil passage 41 and the second driven hydraulic cylinder 30; the third oil passage 43 connects the driven hydraulic cylinder 10 and the second driven hydraulic cylinder 30; and the fourth oil passage 44 connects the third oil passage 43 and the first driven hydraulic cylinder 20.

[0046] The first oil passage switching valve 61, the second oil passage switching valve 62, the third oil passage switching valve 63, and the fourth oil passage switching valve 64 are respectively provided in the first oil passage 41, the second oil passage 42, the third oil passage 43, and the fourth oil passage 44.

[0047] The first oil reservoir 51 is connected to the first oil passage switching valve 61, which causes the first driven hydraulic cylinder 20 to selectively connect to the driven hydraulic cylinder 10 or the first oil reservoir 51. The second oil reservoir 52 is connected to the second oil passage switching valve 62, which causes the second driven hydraulic cylinder 30 to selectively connect to the driven hydraulic cylinder 10 or the second oil reservoir 52. The third oil reservoir 53 is connected to the third oil passage switching valve 63, which causes the second driven hydraulic cylinder 30 to selectively connect to the driven hydraulic cylinder 10 or the third oil reservoir 53. The fourth oil reservoir 54 is connected to the fourth oil passage switching valve 64, which causes the first driven hydraulic cylinder 20 to selectively connect to the driven hydraulic cylinder 10 or the fourth oil reservoir 54.

[0048] The first oil passage switching valve 61, the second oil passage switching valve 62, the third oil passage switching valve 63, and the fourth oil passage switching valve 64 are respectively located in... Figure 2 and Figure 3 In the first connected state shown, the first oil passage 41 is connected to the driven hydraulic cylinder 10 and the first driven hydraulic cylinder 20 through the first oil passage switching valve 61; the second oil passage 42 is connected to the second oil reservoir 52 and the second driven hydraulic cylinder 30 through the second oil passage switching valve 62; the third oil passage 43 is connected to the third oil reservoir 53 and the second driven hydraulic cylinder 30 through the third oil passage switching valve 63; and the fourth oil passage 44 is connected to the driven hydraulic cylinder 10 and the second driven hydraulic cylinder 30 through the fourth oil passage switching valve 64 and the third oil passage 43.

[0049] The rider operates the joystick 91 to follow... Figure 2 As shown, rotating clockwise causes the rudder stick 91 to move the first piston rod 12 axially. Hydraulic oil, through the oil circuit system 40, causes the first driven hydraulic cylinder 20 and the second driven hydraulic cylinder 30 to actuate respectively. The second piston rod 22 causes the front fork 93 to move in a clockwise direction. Figure 2 Rotate clockwise as shown.

[0050] The driven hydraulic cylinder 10 releases hydraulic oil to the first oil passage 41. The hydraulic oil enters the first driven hydraulic cylinder 20 through the first oil passage 41 and the first oil passage switching valve 61. The first driven hydraulic cylinder 20 releases hydraulic oil to the fourth oil passage 44. The hydraulic oil enters the driven hydraulic cylinder 10 through the fourth oil passage switching valve 64 and a portion of the third oil passage 43. Since the cylinder diameters of the driven hydraulic cylinder 10 and the first driven hydraulic cylinder 20 are both the first cylinder diameter, the displacements of the first piston rod 12 and the second piston rod 22 are the same, and the rotation angles of the rudder stalk 91 and the front fork 93 are the same.

[0051] The rotation of the fork 93 causes the second driven hydraulic cylinder 30 to release hydraulic oil into the third oil passage 43. The hydraulic oil enters the third oil reservoir 53 through a portion of the third oil passage 43 and the third oil passage switching valve 63. The second oil reservoir 52 releases hydraulic oil to the second oil passage 42 through the second oil passage switching valve 62. The hydraulic oil enters the second driven hydraulic cylinder 30 through the second oil passage 42.

[0052] Operate the rudder stick 91 to follow Figure 3 As shown, rotating counterclockwise causes the rudder stick 91 to move the first piston rod 12 axially. Hydraulic oil, through the oil circuit system 40, causes the first driven hydraulic cylinder 20 and the second driven hydraulic cylinder 30 to actuate respectively. The second piston rod 22 causes the front fork 93 to move in a counterclockwise direction. Figure 3 Rotate counterclockwise as shown.

[0053] The driven hydraulic cylinder 10 releases hydraulic oil to the third oil passage 43. The hydraulic oil enters the first driven hydraulic cylinder 20 through the third oil passage 43, the fourth oil passage 44 and the fourth oil passage switching valve 64. The first driven hydraulic cylinder 20 releases hydraulic oil to the first oil passage 41. The hydraulic oil enters the driven hydraulic cylinder 10 through the first oil passage switching valve 61. The rudder stick 91 and the front fork 93 rotate at the same angle.

[0054] The rotation of the fork 93 causes the second driven hydraulic cylinder 30 to release hydraulic oil into the second oil passage 42. The hydraulic oil enters the second oil reservoir 52 through the second oil passage switching valve 62. The third oil reservoir 53 releases hydraulic oil into the third oil passage 43 through the third oil passage switching valve 63. The hydraulic oil enters the second driven hydraulic cylinder 30 through the third oil passage 43.

[0055] The first oil passage switching valve 61, the second oil passage switching valve 62, the third oil passage switching valve 63, and the fourth oil passage switching valve 64 are respectively located in... Figure 4 and Figure 5In the second connected state shown, a portion of the first oil passage 41 is connected to the driven hydraulic cylinder 10 and the second driven hydraulic cylinder 30 through the second oil passage switching valve 62, another portion of the first oil passage 41 is connected to the first oil reservoir 51 and the first driven hydraulic cylinder 20 through the first oil passage switching valve 61, the third oil passage 43 is connected to the driven hydraulic cylinder 10 and the second driven hydraulic cylinder 30 through the third oil passage switching valve 63, and a portion of the fourth oil passage 44 is connected to the first driven hydraulic cylinder 20 and the fourth oil reservoir 54 through the fourth oil passage switching valve 64.

[0056] Operate the rudder stick 91 to follow Figure 4 As shown, rotating clockwise causes the rudder stick 91 to move the first piston rod 12 axially. Hydraulic oil, through the oil circuit system 40, causes the first driven hydraulic cylinder 20 and the second driven hydraulic cylinder 30 to actuate respectively. The third piston rod 32 causes the front fork 93 to move in a clockwise direction. Figure 4 Rotate clockwise as shown.

[0057] The driven hydraulic cylinder 10 releases hydraulic oil to the first oil passage 41. The hydraulic oil enters the second driven hydraulic cylinder 30 through part of the first oil passage 41, the second oil passage switching valve 62, and the second oil passage 42. The second driven hydraulic cylinder 30 releases hydraulic oil to the third oil passage 43. The hydraulic oil enters the driven hydraulic cylinder 10 through the third oil passage switching valve 63. Since the cylinder diameter of the driven hydraulic cylinder 10 is the first cylinder diameter, and the first cylinder diameter is smaller than the second cylinder diameter, the displacement of the third piston rod 32 is smaller than the displacement of the first piston rod 12, and the rotation angle of the front fork 93 is smaller than the rotation angle of the rudder stalk 91.

[0058] The rotation of the fork 93 causes the first driven hydraulic cylinder 20 to release hydraulic oil into the fourth oil passage 44. The hydraulic oil enters the fourth oil reservoir 54 through the fourth oil passage 44 and the fourth oil passage switching valve 64. The first oil reservoir 51 releases hydraulic oil to the first oil passage 41 through the first oil passage switching valve 61. The hydraulic oil enters the first driven hydraulic cylinder 20 through a portion of the first oil passage 41.

[0059] Operate the rudder stick 91 to follow Figure 5 As shown, rotating counterclockwise causes the rudder stick 91 to move the first piston rod 12 axially. Hydraulic oil, through the oil circuit system 40, causes the first driven hydraulic cylinder 20 and the second driven hydraulic cylinder 30 to actuate respectively. The third piston rod 32 causes the front fork 93 to move in a counterclockwise direction. Figure 5 Rotate counterclockwise as shown.

[0060] The driven hydraulic cylinder 10 releases hydraulic oil to the third oil passage 43. The hydraulic oil enters the second driven hydraulic cylinder 30 through the third oil passage 43 and the third oil passage switching valve 63. The second driven hydraulic cylinder 30 releases hydraulic oil to the second oil passage 42. The hydraulic oil enters the driven hydraulic cylinder 10 through the second oil passage 42, the second oil passage switching valve 62 and a portion of the first oil passage 41. The rotation angle of the front fork 93 is less than the rotation angle of the rudder stick 91.

[0061] The rotation of the fork 93 causes the first driven hydraulic cylinder 20 to release hydraulic oil into the first oil passage 41. The hydraulic oil enters the first oil reservoir 51 through a portion of the first oil passage 41 and the first oil passage switching valve 61. The fourth oil reservoir 54 releases hydraulic oil to the fourth oil passage 44 through the fourth oil passage switching valve 64. The hydraulic oil enters the first driven hydraulic cylinder 20 through the fourth oil passage 44.

[0062] As mentioned above, based on the same rotation angle of the rudder stick 91, the angle at which the rudder stick 91 controls the rotation of the fork 93 in the first connected state is defined as the first angle. The angle at which the rudder stick 91 controls the rotation of the fork 93 in the second connected state is defined as the second angle, and the second angle is less than the first angle.

[0063] When the bicycle is under a light load, selecting the first oil passage switching valve 61, the second oil passage switching valve 62, the third oil passage switching valve 63, and the fourth oil passage switching valve 64 as the first connected state allows for quick and significant changes in the bicycle's direction, which is beneficial for maneuvering the bicycle to avoid obstacles or potholes on the road. When the bicycle is under a heavier load, selecting the first oil passage switching valve 61, the second oil passage switching valve 62, the third oil passage switching valve 63, and the fourth oil passage switching valve 64 as the second connected state prevents the bicycle from changing its direction significantly in a short period of time, which helps to avoid lateral rollovers caused by excessive steering angles.

[0064] The selection of the first cylinder diameter for the driven hydraulic cylinder 10 allows the steering angle of the front wheel 92 to match the rotation angle of the rudder stick 91 under light load conditions, which is a better implementation choice. The cylinder diameter of the driven hydraulic cylinder 10 can be enlarged or reduced as needed, and the cylinder diameter of the driven hydraulic cylinder 10 should be smaller than the second cylinder diameter in principle.

[0065] The driven hydraulic cylinder 10 has a first cylinder chamber 14 and a second cylinder chamber 16 spaced apart along the axial direction inside. The first cylinder chamber 14 is located between the rudder 91 and the second cylinder chamber 16. The driven hydraulic cylinder 20 has a third cylinder chamber 24 and a fourth cylinder chamber 26 spaced apart along the axial direction inside. The fourth cylinder chamber 26 is located between the third cylinder chamber 24 and the front fork 93. The driven hydraulic cylinder 30 has a fifth cylinder chamber 34 and a sixth cylinder chamber 36 spaced apart along the axial direction inside. The sixth cylinder chamber 36 is located between the fifth cylinder chamber 34 and the front fork 93.

[0066] The first oil passage 41 connects the first cylinder chamber 14 and the third cylinder chamber 24; the second oil passage 42 connects the first oil passage 41 and the sixth cylinder chamber 36; the third oil passage 43 connects the second cylinder chamber 16 and the fifth cylinder chamber 34; and the fourth oil passage 44 connects the third oil passage 43 and the fourth cylinder chamber 26. Accordingly, the third cylinder chamber 24 is selectively connected to either the first cylinder chamber 14 or the first oil reservoir 51; the fourth cylinder chamber 26 is selectively connected to either the second cylinder chamber 16 or the fourth oil reservoir 54; the fifth cylinder chamber 34 is selectively connected to either the second cylinder chamber 16 or the third oil reservoir 53; and the sixth cylinder chamber 36 is selectively connected to either the first cylinder chamber 14 or the second oil reservoir 52.

[0067] Embodiment 1 further includes a lever 70, wherein the lever 70 is mainly composed of a first rod segment 72 and a second rod segment 74 axially connected. The lever 70 has a connecting part 76 located between the first rod segment 72 and the second rod segment 74. The connecting part 76 is connected to the front fork 93. A first driven hydraulic cylinder 20 is connected to the first rod segment 72, and a second driven hydraulic cylinder 30 is connected to the second rod segment 74. The first driven hydraulic cylinder 20 and the second driven hydraulic cylinder 30 drive the front fork 93 to rotate through the lever 70.

[0068] The first driven hydraulic cylinder 20 is connected to the first rod segment 72 via the second piston rod 22, and the second driven hydraulic cylinder 30 is connected to the second rod segment 74 via the third piston rod 32. The first driven hydraulic cylinder 20 pushes the lever 70 and causes the front fork 93 to rotate. The second driven hydraulic cylinder 30 pushes the lever 70 and causes the front fork 93 to rotate.

[0069] The first driven hydraulic cylinder 20 and the second driven hydraulic cylinder 30 can be directly connected to the front fork 93, and the first driven hydraulic cylinder 20 and the second driven hydraulic cylinder 30 directly drive the front fork 93 to rotate, thereby constituting a variation implementation based on Embodiment 1.

[0070] like Figure 6 and Figure 7 As shown, the oil circuit system 40 further includes a controller 80, which is used to control the first oil passage switching valve 61, the second oil passage switching valve 62, the third oil passage switching valve 63 and the fourth oil passage switching valve 64 to operate synchronously when the vehicle is not steering, thereby changing the connection state of the first oil passage switching valve 61, the second oil passage switching valve 62, the third oil passage switching valve 63 and the fourth oil passage switching valve 64.

[0071] The handlebar has a vertical tube 94 connected to the rudder 91. The vertical tube 94 is pivotally connected to a riser tube 95 of the motorcycle. The riser tube 95 is a component that constitutes the frame of the motorcycle. The rudder 91 drives the vertical tube 94 to rotate relative to the riser tube 95. The first oil passage switching valve 61, the second oil passage switching valve 62, the third oil passage switching valve 63 and the fourth oil passage switching valve 64 are respectively connected to the riser tube 95.

[0072] The controller 80 includes a disc body 81 and an operating member 82. The vertical tube 94 is axially connected to the disc body 81. The disc body 81 rotates synchronously with the vertical tube 94. The disc body 81 forms a recessed portion 83, which is formed from the edge of the disc body 81 toward the center of the disc body 81 and extends to two opposite sides of the disc body 81 along the axial direction. The disc body 81 and the operating member 82 are laterally adjacent. The operating member 82, the first oil passage switching valve 61, the second oil passage switching valve 62, the third oil passage switching valve 63, and the fourth oil passage switching valve 64 are arranged sequentially along the axial direction. The operating member 82 actuates the first oil passage switching valve 61, the second oil passage switching valve 62, the third oil passage switching valve 63, and the fourth oil passage switching valve 64, thereby synchronously changing their connection state. The operating member 82 forms a convex portion 84 laterally. The recessed portion 83 is located in the action path of the convex portion 84, causing the convex portion 84 to move through the recessed portion 83.

[0073] The spatial arrangement of the recessed portion 83 and the convex portion 84 allows the steering wheel to be straightened and in a non-steering state facing the front of the motorcycle. When the steering wheel is straightened and facing forward, the recessed portion 83 and the convex portion 84 are opposite each other, and the operating component 82 is axially displaced. The convex portion 84 can pass through the recessed portion 83 in both directions, thereby changing the connection state of the first oil passage switching valve 61, the second oil passage switching valve 62, the third oil passage switching valve 63 and the fourth oil passage switching valve 64.

[0074] The first oil passage switching valve 61, the second oil passage switching valve 62, the third oil passage switching valve 63, and the fourth oil passage switching valve 64 can be replaced by three-port two-position solenoid valves, and the controller 80 can be replaced by a control switch to control the on and off of power. The first oil passage switching valve 61, the second oil passage switching valve 62, the third oil passage switching valve 63, and the fourth oil passage switching valve 64 are electrically connected to the controller 80.

[0075] The hydraulic system 40 further includes a throttle valve 49, which is located in the first oil passage 41. The throttle valve 49 is used to provide damping for the flow of hydraulic oil, so as to avoid the force of the road surface on the front wheel 92, which would cause the hydraulic oil to flow back and forth frequently in a short period of time, thereby preventing the throttle from forming a rapid and repeated swing phenomenon that is difficult to control.

[0076] The first oil reservoir 51, the second oil reservoir 52, the third oil reservoir 53 and the fourth oil reservoir 54 are each constructed by a variable-volume oil reservoir with a bladder (not shown in the figure), and the elasticity of the bladder provides the force to push the hydraulic oil out of the bladder.

[0077] The first oil reservoir 51, the second oil reservoir 52, the third oil reservoir 53 and the fourth oil reservoir 54 can be replaced by variable volume oil reservoirs (not shown in the figure) mainly composed of a diaphragm inside a housing, and the diaphragm is pushed by a spring to deliver hydraulic oil into the housing.

[0078] The aforementioned two types of variable volume oil reservoirs are existing technologies familiar to those skilled in the art to which this invention pertains, and their specific configurations will not be described in detail.

[0079] Figure 8 An example of a modified embodiment obtained by applying the aforementioned embodiment one is shown.

[0080] Example 2 of the steering mechanism for a bicycle Figures 9 to 13 As shown, its main difference from Embodiment 1 lies in the fact that the hydraulic system 40 includes a fifth oil passage 45, a sixth oil passage 46, a seventh oil passage 47, a fifth oil reservoir 55, a sixth oil reservoir 56, and a five-port two-position valve 65. The fifth oil passage 45, sixth oil passage 46, and seventh oil passage 47 respectively form the flow paths of the hydraulic oil. The five-port two-position valve 65 is an oil passage switching valve. The fifth oil passage 45 connects the driven hydraulic cylinder 10 and the five-port two-position valve 65; the sixth oil passage 46 connects the first driven hydraulic cylinder 20 and the five-port two-position valve 65; and the seventh oil passage 47 connects the second driven hydraulic cylinder 30 and the five-port two-position valve 65. The two-position valve 65, the fifth reservoir 55, and the sixth reservoir 56 are used to collect and release hydraulic oil, respectively. The fifth reservoir 55 and the sixth reservoir 56 are respectively connected to the five-port two-position valve 65, thereby selecting and changing the connection relationship between the first driven hydraulic cylinder 20 or the second driven hydraulic cylinder 30 and the fifth reservoir 55, the sixth reservoir 56, and the driven hydraulic cylinder 10. The fifth oil passage 45 is connected to the sixth oil passage 46 or the seventh oil passage 47 through the five-port two-position valve 65. The sixth oil passage 46 is connected to the fifth oil passage 45 or the fifth reservoir 55, and the seventh oil passage 47 is connected to the fifth oil passage 45 or the sixth reservoir 56.

[0081] Five-port two-position valve 65 Figure 10 and Figure 11 In the first connected state shown, the fifth oil passage 45 is connected to the sixth oil passage 46 through the five-port two-position valve 65, and the seventh oil passage 47 is connected to the sixth oil reservoir 56 through the five-port two-position valve 65.

[0082] Operate the rudder stick 91 to follow Figure 10As shown, rotating clockwise causes the rudder stick 91 to actuate the driven hydraulic cylinder 10 to release hydraulic oil to the fifth oil passage 45. The hydraulic oil then enters the first driven hydraulic cylinder 20 through the five-port two-position valve 65 and the sixth oil passage 46. The first driven hydraulic cylinder 20 drives the front fork 93 to follow the direction of rotation. Figure 10 As shown, the clockwise rotation of the fork 93 causes the second driven hydraulic cylinder 30 to draw hydraulic oil from the seventh oil passage 47, and the sixth oil reservoir 56 to release the hydraulic oil. The hydraulic oil then enters the second driven hydraulic cylinder 30 through the five-port two-position valve 65 and the seventh oil passage 47.

[0083] Operate the rudder stick 91 to follow Figure 11 As shown, rotating counterclockwise causes the rudder stick 91 to actuate the driven hydraulic cylinder 10 to draw hydraulic oil from the fifth oil passage 45, while the first driven hydraulic cylinder 20 releases hydraulic oil to the sixth oil passage 46. The hydraulic oil then enters the driven hydraulic cylinder 10 through the five-port two-position valve 65 and the fifth oil passage 45. The second driven hydraulic cylinder 30 releases hydraulic oil to the seventh oil passage 47, which then enters the sixth oil reservoir 56 through the seventh oil passage 47 and the five-port two-position valve 65. The first driven hydraulic cylinder 20 and the second driven hydraulic cylinder 30 together cause the front fork 93 to rotate in a counterclockwise direction. Figure 11 Rotate counterclockwise as shown.

[0084] Five-port two-position valve 65 Figure 12 and Figure 13 In the second connected state shown, the fifth oil passage 45 is connected to the seventh oil passage 47 through the five-port two-position valve 65, and the sixth oil passage 46 is connected to the fifth oil reservoir 55 through the five-port two-position valve 65.

[0085] Operate the rudder stick 91 to follow Figure 12 As shown, rotating clockwise causes the rudder stick 91 to actuate the driven hydraulic cylinder 10 to release hydraulic oil to the fifth oil passage 45. The hydraulic oil then enters the second driven hydraulic cylinder 30 through the five-port two-position valve 65 and the seventh oil passage 47. The second driven hydraulic cylinder 30 drives the front fork 93 to follow the direction of rotation. Figure 12 As shown, the clockwise rotation of the fork 93 causes the first driven hydraulic cylinder 20 to draw hydraulic oil from the sixth oil passage 46, and the fifth oil reservoir 55 to release the hydraulic oil. The hydraulic oil then enters the first driven hydraulic cylinder 30 through the five-port two-position valve 65 and the sixth oil passage 46.

[0086] Operate the rudder stick 91 to follow Figure 13 As shown, rotating counterclockwise causes the rudder stick 91 to actuate the driven hydraulic cylinder 10 to draw hydraulic oil from the hydraulic system 40. The second driven hydraulic cylinder 30 releases hydraulic oil to the seventh oil passage 47. The hydraulic oil enters the driven hydraulic cylinder 10 through the seventh oil passage 47, the five-port two-position valve 65, and the fifth oil passage 45. The first driven hydraulic cylinder 20 releases hydraulic oil to the sixth oil passage 46. The hydraulic oil enters the fifth oil reservoir 55 through the five-port two-position valve 65. The first driven hydraulic cylinder 20 and the second driven hydraulic cylinder 30 together cause the front fork 93 to rotate in a clockwise direction. Figure 13 Rotate counterclockwise as shown.

[0087] In Embodiment 2, the driven hydraulic cylinder 10, the first driven hydraulic cylinder 20, and the second driven hydraulic cylinder 30 are each selected to be constructed using a single-acting hydraulic cylinder. The single-acting hydraulic cylinder refers to a hydraulic cylinder with a single cylinder chamber, in which hydraulic oil applies pressure to one side of the piston, and the piston can be repositioned by a spring installed inside the single-acting hydraulic cylinder, external force, or self-repositioning.

[0088] The overall structure of Embodiment 2 is more streamlined than that of Embodiment 1. Furthermore, Embodiment 2 can change the connection state of the five-port two-position valve 65, allowing the rider to quickly and significantly change the direction of travel when under light load. This is beneficial for maneuvering and avoiding obstacles or potholes on the road. When the rider is under heavier load, it can prevent the rider from changing the direction of travel significantly in a short period of time, thus helping to avoid lateral rollovers caused by excessive steering angles.

[0089] The controller 80 of Embodiment 2 is used to control the operation of the five-port two-position valve 65 when the vehicle is not turned. The controller 80 includes a disc body 81 and an operating member 82. Its main difference from Embodiment 1 is that the operating member 82 and the five-port two-position valve 65 are arranged along the axial direction. The operating member 82 actuates the five-port two-position valve 65, thereby changing the connection state of the five-port two-position valve 65.

[0090] The present invention further provides a component for cooperating with the driven hydraulic cylinder 10 and the first driven hydraulic cylinder 20 to form the steering device of the aforementioned bicycle. One embodiment of the component includes a second driven hydraulic cylinder 30 and an oil circuit system 40 of the steering device of the aforementioned bicycle. Its specific configuration is as described above for the steering device of the bicycle, and will not be repeated.

[0091] The second embodiment of the component includes the second driven hydraulic cylinder 30 and hydraulic circuit system 40 of the aforementioned second embodiment of the steering device of the motorcycle. Its specific configuration is as described above in the second embodiment of the steering device of the motorcycle, and will not be repeated here.

[0092] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A steering device for a bicycle, characterized in that... include: A driven hydraulic cylinder is connected to the steering rod of the handlebars of the bicycle, and the driven hydraulic cylinder is driven by the steering rod. A first driven hydraulic cylinder is coupled to the front fork of the bicycle. The first driven hydraulic cylinder drives the front fork to rotate. The cylinder diameter of the first driven hydraulic cylinder is defined as the first cylinder diameter. A second driven hydraulic cylinder is coupled to the front fork. The second driven hydraulic cylinder drives the front fork to rotate. The cylinder diameter of the second driven hydraulic cylinder is defined as the second cylinder diameter, and the second cylinder diameter is larger than the first cylinder diameter. A hydraulic circuit system includes several oil passages, several oil reservoirs, and several oil passage switching valves. Each oil passage forms a flow path for hydraulic oil, which enters or leaves the driven hydraulic cylinder, the first driven hydraulic cylinder, and the second driven hydraulic cylinder. Each oil passage switching valve is located in a selected oil passage. Each oil reservoir is connected to a corresponding oil passage switching valve. Each oil reservoir is used to collect and release hydraulic oil, thereby changing the connection relationship between the first driven hydraulic cylinder or the second driven hydraulic cylinder and the corresponding oil reservoir.

2. The steering device for a bicycle according to claim 1, characterized in that... The oil circuit system includes four oil reservoirs and four oil passage switching valves. Each oil passage is defined as the first oil passage, the second oil passage, the third oil passage, and the fourth oil passage. Each oil reservoir is defined as the first oil reservoir, the second oil reservoir, the third oil reservoir, and the fourth oil reservoir. Each oil passage switching valve is defined as the first oil passage switching valve, the second oil passage switching valve, the third oil passage switching valve, and the fourth oil passage switching valve. The first oil passage connects the driven hydraulic cylinder and the first driven hydraulic cylinder; the second oil passage connects the first oil passage and the second driven hydraulic cylinder; the third oil passage connects the driven hydraulic cylinder and the second driven hydraulic cylinder; and the fourth oil passage connects the third oil passage and the first driven hydraulic cylinder. The first oil passage switching valve, the second oil passage switching valve, the third oil passage switching valve, and the fourth oil passage switching valve are respectively located in the first oil passage, the second oil passage, the third oil passage, and the fourth oil passage; The first oil reservoir is connected to the first oil passage switching valve, and the first driven hydraulic cylinder is selectively connected to either the driven hydraulic cylinder or the first oil reservoir; the second oil reservoir is connected to the second oil passage switching valve, and the second driven hydraulic cylinder is selectively connected to either the driven hydraulic cylinder or the second oil reservoir; the third oil reservoir is connected to the third oil passage switching valve, and the second driven hydraulic cylinder is selectively connected to either the driven hydraulic cylinder or the third oil reservoir; the fourth oil reservoir is connected to the fourth oil passage switching valve, and the first driven hydraulic cylinder is selectively connected to either the driven hydraulic cylinder or the fourth oil reservoir.

3. The steering device for a bicycle according to claim 2, characterized in that... The internal structure of the driven hydraulic cylinder is axially spaced to form a first cylinder chamber and a second cylinder chamber, with the first cylinder chamber located between the rudder and the second cylinder chamber. The interior of the first driven hydraulic cylinder is axially spaced to form a third cylinder chamber and a fourth cylinder chamber, with the fourth cylinder chamber located between the third cylinder chamber and the front fork. The interior of the second driven hydraulic cylinder is axially spaced to form a fifth cylinder chamber and a sixth cylinder chamber, with the sixth cylinder chamber located between the fifth cylinder chamber and the front fork. The first oil passage connects the first cylinder chamber and the third cylinder chamber; the second oil passage connects the first oil passage and the sixth cylinder chamber; the third oil passage connects the second cylinder chamber and the fifth cylinder chamber; the fourth oil passage connects the third oil passage and the fourth cylinder chamber; the third cylinder chamber is selectively connected to either the first cylinder chamber or the first oil reservoir; the fourth cylinder chamber is selectively connected to either the second cylinder chamber or the fourth oil reservoir; the fifth cylinder chamber is selectively connected to either the second cylinder chamber or the third oil reservoir; and the sixth cylinder chamber is selectively connected to either the first cylinder chamber or the second oil reservoir.

4. The steering device for a bicycle according to claim 1, characterized in that... It also includes a lever, which is mainly composed of a first rod segment and a second rod segment axially connected. The lever has a connecting part located between the first rod segment and the second rod segment. The connecting part is connected to the front fork. A first driven hydraulic cylinder is connected to the first rod segment, and a second driven hydraulic cylinder is connected to the second rod segment.

5. The steering device for a bicycle according to claim 1, characterized in that... The hydraulic system also includes a controller that controls the synchronous operation of the switching valves in each hydraulic passage when the vehicle is not being steered.

6. A steering device for a bicycle, characterized in that... include: A driven hydraulic cylinder is connected to the steering rod of the handlebars of the bicycle, and the driven hydraulic cylinder is driven by the steering rod. A first driven hydraulic cylinder is coupled to the front fork of the bicycle. The first driven hydraulic cylinder drives the front fork to rotate. The cylinder diameter of the first driven hydraulic cylinder is defined as the first cylinder diameter. A second driven hydraulic cylinder is used to couple to the front fork. The second driven hydraulic cylinder drives the front fork to rotate. The cylinder diameter of the second driven hydraulic cylinder is defined as the second cylinder diameter, and the second cylinder diameter is larger than the first cylinder diameter. A hydraulic circuit system includes a fifth oil passage, a sixth oil passage, a seventh oil passage, a fifth oil reservoir, a sixth oil reservoir, and a five-port two-position valve. The fifth, sixth, and seventh oil passages form the flow paths of hydraulic oil. The fifth oil passage connects the driven hydraulic cylinder and the five-port two-position valve. The sixth oil passage connects the first driven hydraulic cylinder and the five-port two-position valve. The seventh oil passage connects the second driven hydraulic cylinder and the five-port two-position valve. The fifth and sixth oil reservoirs are used to collect and release hydraulic oil, respectively. The fifth and sixth oil reservoirs are connected to the five-port two-position valve, thereby changing the connection relationship between the first or second driven hydraulic cylinder and the fifth, sixth, and driven hydraulic cylinders.

7. The steering device for a bicycle according to claim 6, characterized in that... It also includes a lever, which is mainly composed of a first rod segment and a second rod segment axially connected. The lever has a connecting part located between the first rod segment and the second rod segment. The connecting part is connected to the front fork. A first driven hydraulic cylinder is connected to the first rod segment, and a second driven hydraulic cylinder is connected to the second rod segment.

8. The steering device for a bicycle according to claim 6, characterized in that... The hydraulic system also includes a controller that controls the operation of the five-port two-position valve when the vehicle is not being steered.

9. An assembly for constituting a steering device in a bicycle, characterized in that... The components are configured to cooperate with a driven hydraulic cylinder and a first driven hydraulic cylinder to form the steering device. The driven hydraulic cylinder is connected to the rudder of the handlebar of the bicycle and is driven by the rudder. The first driven hydraulic cylinder is coupled to the front fork of the bicycle and drives the front fork to rotate. The cylinder diameter of the first driven hydraulic cylinder is defined as the first cylinder diameter. The components include: A second driven hydraulic cylinder is used to couple to the front fork. The second driven hydraulic cylinder drives the front fork to rotate. The cylinder diameter of the second driven hydraulic cylinder is defined as the second cylinder diameter, and the second cylinder diameter is larger than the first cylinder diameter. A hydraulic circuit system connects the driven hydraulic cylinder, the first driven hydraulic cylinder, and the second driven hydraulic cylinder; The hydraulic system includes several oil passages, several oil reservoirs, and several oil passage switching valves. Each oil passage forms a flow path for hydraulic oil, which enters or leaves the driven hydraulic cylinder, the first driven hydraulic cylinder, and the second driven hydraulic cylinder. Each oil passage switching valve is located in a selected oil passage, and each oil reservoir is connected to a corresponding oil passage switching valve, thereby changing the connection relationship between the first driven hydraulic cylinder or the second driven hydraulic cylinder and each oil reservoir. Each oil reservoir is used to collect and release hydraulic oil.

10. The assembly for constituting a steering device of a motorcycle according to claim 9, characterized in that... The oil circuit system includes four oil reservoirs and four oil passage switching valves. Each oil passage is defined as the first oil passage, the second oil passage, the third oil passage, and the fourth oil passage. Each oil reservoir is defined as the first oil reservoir, the second oil reservoir, the third oil reservoir, and the fourth oil reservoir. Each oil passage switching valve is defined as the first oil passage switching valve, the second oil passage switching valve, the third oil passage switching valve, and the fourth oil passage switching valve. The first oil passage is used to connect the driven hydraulic cylinder and the first driven hydraulic cylinder; the second oil passage is used to connect the first oil passage and the second driven hydraulic cylinder; the third oil passage is used to connect the driven hydraulic cylinder and the second driven hydraulic cylinder; and the fourth oil passage is used to connect the third oil passage and the first driven hydraulic cylinder. The first oil passage switching valve, the second oil passage switching valve, the third oil passage switching valve and the fourth oil passage switching valve are respectively provided in the first oil passage, the second oil passage, the third oil passage and the fourth oil passage, and the first oil reservoir is connected to the first oil passage switching valve. The first driven hydraulic cylinder is selected to be connected to the driven hydraulic cylinder or the first oil reservoir; the second driven hydraulic cylinder is selected to be connected to the driven hydraulic cylinder or the second oil reservoir; the second driven hydraulic cylinder is selected to be connected to the driven hydraulic cylinder or the third oil reservoir; and the first driven hydraulic cylinder is selected to be connected to the driven hydraulic cylinder or the fourth oil reservoir.

11. The assembly for constituting a steering device of a motorcycle according to claim 10, characterized in that... The internal structure of the driven hydraulic cylinder is axially spaced to form a first cylinder chamber and a second cylinder chamber, with the first cylinder chamber located between the rudder and the second cylinder chamber. The interior of the first driven hydraulic cylinder is axially spaced to form a third cylinder chamber and a fourth cylinder chamber, with the fourth cylinder chamber located between the third cylinder chamber and the front fork. The interior of the second driven hydraulic cylinder is axially spaced to form a fifth cylinder chamber and a sixth cylinder chamber, with the sixth cylinder chamber located between the fifth cylinder chamber and the front fork. The first oil passage connects the first cylinder chamber and the third cylinder chamber; the second oil passage connects the first oil passage and the sixth cylinder chamber; the third oil passage connects the second cylinder chamber and the fifth cylinder chamber; the fourth oil passage connects the third oil passage and the fourth cylinder chamber; the third cylinder chamber is selectively connected to either the first cylinder chamber or the first oil reservoir; the sixth cylinder chamber is selectively connected to either the first cylinder chamber or the second oil reservoir; the fifth cylinder chamber is selectively connected to either the second cylinder chamber or the third oil reservoir; and the fourth cylinder chamber is selectively connected to either the second cylinder chamber or the fourth oil reservoir.

12. The assembly for constituting a steering device of a motorcycle according to claim 9, characterized in that... It also includes a lever, which is mainly composed of a first rod segment and a second rod segment axially connected. The lever has a connecting part located between the first rod segment and the second rod segment. The connecting part is connected to the front fork. A first driven hydraulic cylinder is connected to the first rod segment, and a second driven hydraulic cylinder is connected to the second rod segment.

13. The assembly for constituting a steering device of a motorcycle according to claim 9, characterized in that... The hydraulic system also includes a controller that controls the synchronous operation of the switching valves in each hydraulic passage when the vehicle is not being steered.

Images