Multi-wheel vehicle frame

Abstract

A multi-wheeled vehicle (e.g., bicycle, tricycle, quadricycle) frame includes a head member, a seat member, an upper member, a support member, and a lower member. The seat member is disposed away from the head member. The upper member is pivotally connected to the seat member and to the head member. The support member is pivotally connected to the seat member and to the head member. The lower member is pivotally connected to the seat member and to the head member.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This PCT application claims the benefit of and priority to U.S. patent application No. 17 / 981,347, filed on November 4, 2022, the entire contents of which are incorporated herein by reference. Background Art

[0002] The present invention generally relates to the field of multi-wheeled vehicles, such as bicycles, tricycles, etc. More particularly, the present invention generally relates to frames for such vehicles. Summary of the Invention

[0003] One embodiment of the present invention relates to a frame for a multi-wheeled vehicle. The frame includes a head tube, a seat tube, a top tube, a support tube, and a down tube. The seat tube is located remote from the head tube. The top tube is pivotally connected to the seat tube and to the head tube. The support tube is pivotally connected to the seat tube and to the head tube. The down tube is pivotally connected to the seat tube and to the head tube.

[0004] Another embodiment relates to a method of assembling a multi-wheeled vehicle. The method includes pivotally connecting a top tube to a seat tube and a head tube. The method includes pivotally connecting a down tube to the seat tube and the head tube. The method includes pivotally connecting a support tube to the seat tube and the head tube.

[0005] Another embodiment relates to a multi-wheeled vehicle. The multi-wheeled vehicle includes a head tube. The multi-wheeled vehicle includes a seat tube disposed remotely from the head tube. The multi-wheeled vehicle includes a top tube pivotally connected to the seat tube and pivotally connected to the head tube. The multi-wheeled vehicle includes a support tube pivotally connected to the seat tube and pivotally connected to the head tube. The multi-wheeled vehicle includes a down tube pivotally connected to the seat tube and pivotally connected to the head tube. The multi-wheeled vehicle includes a seat fork having a first end and a second end, the first end of the seat fork being connected to the seat tube in a first position. The multi-wheeled vehicle includes a chain fork having a first end and a second end, the first end of the chain fork being connected to the seat tube in a second position, and the second end of the chain fork being connected to the second end of the seat fork.

[0006] The invention is capable of other embodiments and of being practiced in various ways. Alternative exemplary embodiments involve other features and combinations of features than those described herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The present disclosure will be more fully understood through the following detailed description in conjunction with the accompanying drawings, in which like reference numerals refer to like elements, wherein:

[0008] Figure 1 is a side view of a two-wheeled vehicle or bicycle according to an exemplary embodiment.

[0009] Figure 2 is a side view of a two-wheeled vehicle or bicycle according to an exemplary embodiment.

[0010] Figure 3 is a side view of a two-wheeled vehicle or bicycle according to an exemplary embodiment.

[0011] Figure 4 is a side view of a two-wheeled vehicle or bicycle according to an exemplary embodiment.

[0012] Figure 5 is a side view of a two-wheeled vehicle or bicycle according to an exemplary embodiment.

[0013] Figure 6 is a side view of a two-wheeled vehicle or bicycle according to an exemplary embodiment.

[0014] Figure 7 is a side view of a two-wheeled vehicle or bicycle according to an exemplary embodiment.

[0015] Figure 8 is a side view of a two-wheeled vehicle or bicycle according to an exemplary embodiment.

[0016] Figure 9A is a perspective view of a three-wheeled vehicle or tricycle according to an exemplary embodiment.

[0017] Figure 9B is a perspective view of a three-wheeled vehicle or tricycle according to an exemplary embodiment.

[0018] Figure 9C is a perspective view of a three-wheeled vehicle or tricycle according to an exemplary embodiment.

[0019] Figure 10 is a perspective view of a three-wheeled vehicle or tricycle according to an exemplary embodiment.

[0020] Figure 11 is a perspective view of a four-wheeled vehicle or quadricycle according to an exemplary embodiment.

[0021] Figure 12 is a perspective view of a four-wheeled vehicle or quadricycle according to an exemplary embodiment.

[0022] Figure 13 is a diagram of a joint or connector according to an exemplary embodiment.

[0023] Figure 14 is a block diagram of a method of assembling a multi-wheeled vehicle frame according to an exemplary embodiment. DETAILED DESCRIPTION

[0024] Before turning to the drawings showing exemplary embodiments in detail, it should be understood that the present application is not limited to the details or methods set forth in the specification or shown in the drawings. It should also be understood that the terminology is used for descriptive purposes only and should not be regarded as limiting.

[0025] According to an exemplary embodiment, a multi-wheeled vehicle frame (e.g., a bicycle frame) may include multiple components configured to provide a bicycle structure. The multiple components can be arranged in various configurations to connect the front wheel to the rear wheel. The multiple components can also provide a structure to support the bicycle user or rider. A first component of the multiple components can be a head tube. A second component of the multiple components can be a steering tube. A first end of the steering tube can be connected to the handlebars of the multi-wheeled vehicle, and a second end of the steering tube can be connected to the front wheel of the multi-wheeled vehicle via a fork member. A third component of the multiple components can be a seat tube. A fourth component of the multiple components can be a seat post. The seat post can provide support for the user of the bicycle. For example, the top of the seat post can be connected to the user's seat.

[0026] Some of the plurality of components may extend between the head tube and the seat tube. For example, a fifth component of the plurality of components may be a top tube. The top tube may extend between the head tube and the seat tube. For example, the front end of the top tube may be connected to the head tube. The top tube may be connected to the head tube at a first head tube action point. The physical connection point between the top tube and the head tube may be located at or near the action point, as described in more detail herein. The location of the action point may be based on the intersection of the neutral axis of the first component (e.g., the center axis of a component having a symmetrical cross-sectional shape) and the neutral axis of the second component when the frame is assembled (e.g., when the frame is constructed and oriented for use). For example, when the frame is assembled, the first head tube action point may be located at the intersection of the neutral axis of the top tube and the neutral axis of the head tube. The action point may be located anywhere on the neutral axis of the component between one end of the component and its nearest action point (including the action point). For example, the point of action between the top tube and the head tube can be located on the neutral axis of the top tube, anywhere between the front end of the top tube and the first head tube point of action (including this point of action). The rear end of the top tube can be connected to the seat tube. The top tube can be connected to the seat tube at the first seat tube point of action. The sixth component of the multiple components can be a down tube. The down tube can also extend between the head tube and the seat tube. For example, the front end of the down tube can be connected to the head tube. The down tube can be connected to the head tube at a second head tube point of action. The second head tube point of action can be closer to the second end of the head tube than the first head tube point of action. The rear end of the down tube can be connected to the seat tube. The down tube can be connected to the seat tube at a second seat tube point of action. The second seat tube point of action can be farther away from the seat than the first seat tube point of action. The seventh component of the multiple components can be a support tube. The support tube can also extend between the head tube and the seat tube. For example, in some embodiments, the front end of the support tube may be connected to the head tube at a second head tube application point (e.g., the same application point as the down tube), and the rear end of the support tube may be connected to the seat tube at a first seat tube application point (e.g., the same application point as the top tube). In other embodiments, the front end of the support tube may be connected to the head tube at the first head tube application point, and the rear end of the support tube may be connected to the seat tube at the second seat tube application point.

[0027] The support tube reduces the bending forces applied to the head tube, seat tube, top tube, and down tube, and, combined with the orientation of all components (including but not limited to the seat stay and chain stay), allows all components to rely on compressive and / or tensile strength to maintain the structure of the multi-wheeled frame. Therefore, each end of the top tube, down tube, support tube, seat stay, and chain stay can include a loose pin connection, wherein any component can move (e.g., pivot, rotate, etc.) about the transverse axis of any connection to which it is connected in the absence of all other components. Compression and tension forces alone can prevent the components from rotating about the hinged connection. Relying solely on compressive and / or tensile strength to maintain the structure of the multi-wheeled frame allows each connection adjacent to the point of action to be pinned (e.g., hinged) and can minimize the cross-sectional dimensions required for each component. For example, each component can be thinner than similar components of other multi-wheeled frames that apply bending forces to the components. In addition, each hinged connection can be made with a detachable pin, which facilitates disassembly of the frame and thus facilitates transportation of the bicycle.

[0028] refer to Figure 1 and Figure 2 , which shows a side view of an apparatus (shown as a bicycle 100) according to an exemplary embodiment. The apparatus can be a bicycle 100 or other vehicle or device having a frame structure and at least two wheels. Bicycle 100 includes at least one frame 105, at least one front wheel 110, and at least one rear wheel 115. Frame 105 provides the structure of bicycle 100, allowing the structural components of bicycle 100 to remain substantially stationary relative to one another during use or operation of bicycle 100. Frame 105 connects at least one front wheel 110 of bicycle 100 with at least one rear wheel 115 of bicycle 100. Frame 105 includes multiple (structural) components. For example, frame 105 includes a first component (shown as a head tube assembly 120), a second component (shown as a seat tube 125), a third component (shown as a top tube 130), a fourth component (shown as a down tube 135), a fifth component (shown as a support tube 140), a sixth component (shown as a seat stay 145), and a seventh component (shown as a chain stay 150). According to various embodiments, the frame 105 can include any combination of components, including some, all, none, or more of the components described herein. The multiple components of the frame 105 can be connected to each other through multiple points of action. The multiple components can be oriented in any number of configurations.

[0029] The head tube assembly 120 connects the steering mechanism (shown as handlebars 155) to the front wheel 110 of the bicycle 100. The head tube assembly 120 can be a single component or include multiple components. For example, the head tube assembly 120 can include a head tube 122, a steering tube 124 extending at least partially through the head tube 122, and a fork member 126. The head tube assembly 120 can include at least one headset bearing 127. The headset bearing 127 can prevent the steering tube 124 from sliding past the head tube 122. The head tube assembly 120 can include multiple headset bearings 127. For example, a first headset bearing can be located at the top end of the head tube 122, and a second headset bearing can be located at the bottom end of the head tube 122. The steering tube 124 extends between the handlebars 155 and the fork member 126. The fork member 126 is connected to the front wheel 110 via a front wheel action point 160 (e.g., a wheel bearing). The fork member 126 may extend along both sides of the front wheel 110 and connect the head tube assembly 120 to a front wheel application point 160 via both sides of the front wheel 110. The front wheel application point 160 may be a portion of a hub of the front wheel 110 or other central structure of the front wheel 110. The front wheel application point 160 may be near or located at the center of the front wheel 110.

[0030] The seat tube 125 is disposed remote from the head tube assembly 120. The seat tube 125 can be a single component or comprise multiple components. The seat tube 125 is configured to receive a seat post 128. The seat post 128 is configured to extend at least partially into the seat tube 125. The seat post 128 is coupled to a support structure (shown as a seat 165). The seat post 128 provides support for a user of the bicycle 100. For example, the top end of the seat post 128 is coupled to and supports the seat 165, allowing the user to sit on the seat 165.

[0031] The frame 105 includes at least one member extending between the head tube assembly 120 and the seat tube 125. For example, the top tube 130 extends between the head tube assembly 120 and the seat tube 125. The top tube 130 can be a single member. For example, the top tube 130 can be a single tube extending between the head tube assembly 120 and the seat tube 125. In other embodiments, the top tube 130 can include multiple members. The front end of the top tube 130 is connected to the head tube assembly 120. The top tube 130 is connected to the head tube assembly 120 at a first head tube assembly location (shown as a first head tube application point 170). The first head tube application point 170 can be closer to the top end of the head tube assembly 120 than to the bottom end of the head tube assembly 120. In some embodiments, the first head tube application point 170 is located at the top end of the head tube 122.

[0032] The rear end of the top tube 130 is connected to the seat tube 125. The top tube 130 is connected to the seat tube 125 at a first seat tube location (shown as a first seat tube action point 175). The first seat tube action point 175 can be closer to the top end of the seat tube 125 than to the bottom end of the seat tube 125. The top tube 130 can be pivotally connected to the head tube assembly 120. The top tube 130 can be pivotally connected to the seat tube 125. For example, the top tube 130 can be connected to the head tube assembly 120 so that the top tube 130 can pivot about a transverse axis at or near the first head tube action point 170. The top tube 130 can be connected to the seat tube 125 so that the top tube 130 can pivot about a transverse axis at or near the first seat tube action point 175. The transverse axis of each connection at or near the first head tube action point 170 and the first seat tube action point 175 is perpendicular (e.g., orthogonal) to the plane of the frame 105. For example, rotation of the top tube 130 about its transverse axis at or near the first head tube application point 170 or the first seat tube application point 175 occurs within the plane of the frame 105. The position of the first seat tube application point 175 remains fixed relative to the seat tube 125, and therefore, each connection at or near the first seat tube application point 175 remains stationary relative to the seat tube 125. For example, as the seat post 128 is retracted into or extended from the seat tube 125, the position of the first seat tube application point 175 remains stationary and does not move with the seat post 128. The position of the first head tube application point 170 remains fixed relative to the head tube assembly 120, and therefore, each connection at or near the first head tube application point 170 can remain stationary relative to the head tube assembly 120. For example, as the steerer tube 124 rotates about its longitudinal axis through the head tube 122, the position of the first head tube application point 170 remains stationary and does not move with the steerer tube 124. Therefore, any connection points at or near these points of application (eg, point of application 170, point of application 175) also remain stationary.

[0033] In some embodiments, another member extends between the head tube assembly 120 and the seat tube 125. For example, a down tube 135 extends between the head tube assembly 120 and the seat tube 125. The down tube 135 can be a single member. For example, the down tube 135 can be a single tube extending between the head tube assembly 120 and the seat tube 125. In other embodiments, the down tube 135 comprises multiple members. The front end of the down tube 135 is connected to the head tube assembly 120. The down tube 135 is connected to the head tube assembly 120 at a second head tube location (shown as a second head tube action point 180). The second head tube action point 180 can be closer to the bottom end of the head tube assembly 120 than to the top end of the head tube assembly 120. For example, the second head tube action point 180 is located a first distance from the top end of the head tube assembly 120 and a second distance from the bottom end of the head tube assembly 120, where the first distance is greater than the second distance. In some embodiments, second head tube impact point 180 is located at the bottom end of head tube 122. Second head tube impact point 180 is positioned closer to the bottom end of head tube assembly 120 than first head tube impact point 170. For example, first head tube impact point 170 is positioned a first distance from the top end of head tube assembly 120, and second head tube impact point 180 is positioned a second distance from the top end of head tube assembly 120, where the first distance is less than the second distance. In some embodiments, first head tube impact point 170 is positioned on the upper head tube and second head tube impact point 180 is positioned on the lower head tube, as described in greater detail herein. In some embodiments, both first head tube impact point 170 and second head tube impact point 180 are positioned on head tube 122.

[0034] The rear end of the down tube 135 is connected to the seat tube 125. The down tube 135 is connected to the seat tube 125 at a second seat tube location (shown as a second seat tube action point 185). The second seat tube action point 185 can be located at the bottom bracket housing of the bicycle 100. For example, the down tube 135 can be connected to the seat tube 125 at the same location as the bottom bracket housing of the bicycle 100. The second seat tube action point 185 can be closer to the bottom end of the seat tube 125 than the first seat tube action point 175. In some embodiments, the second seat tube action point 185 is located at the bottom end of the seat tube 125.

[0035] The down tube 135 is pivotally coupled to the head tube assembly 120. The down tube 135 is pivotally coupled to the seat tube 125. For example, the down tube 135 is coupled to the head tube assembly 120 such that the down tube 135 can pivot about a transverse axis of its connection at or near the second head tube application point 180. The down tube 135 is coupled to the seat tube 125 such that the down tube 135 can pivot about a transverse axis of its connection at or near the second seat tube application point 175. The transverse axis of the connection at or near the second head tube application point 180 and the transverse axis of the connection at or near the second seat tube application point 185 are perpendicular (e.g., orthogonal) to the plane of the frame 105. For example, rotation of the down tube 135 about its transverse axis of its connection at or near the second head tube application point 180 and / or the transverse axis of its connection at or near the second seat tube application point 185 occurs within the plane of the frame 105. The position of the second seat tube application point 185 remains fixed relative to the seat tube 125. The position of the second head tube action point 180 remains fixed relative to the head tube assembly 120. In some embodiments, the second seat tube action point 185 is disposed at the same location as the bottom bracket shell.

[0036] In some embodiments, another member extends between the head tube assembly 120 and the seat tube 125. For example, a support tube 140 extends between the head tube assembly 120 and the seat tube 125. The support tube 140 may be a single member. For example, the support tube 140 may be a single tube extending between the head tube assembly 120 and the seat tube 125. In other embodiments, the support tube 140 comprises multiple members. The front end of the support tube 140 is connected to the head tube assembly 120. The support tube 140 is connected to the head tube assembly 120 at a second head tube application point 180. For example, the support tube 140 is connected to the head tube assembly 120 at the same location as the down tube 135. The rear end of the support tube 140 is connected to the seat tube 125. The support tube 140 is connected to the seat tube 125 at a first seat tube application point 175. For example, the support tube 140 is connected to the seat tube 125 at the same location as the top tube 130.

[0037] like Figure 2As shown in Figures 1 and 2, support tube 140 can be coupled to head tube assembly 120 and seat tube 125 at various locations. For example, support tube 140 is coupled to head tube assembly 120 at first head tube application point 170 and at second seat tube application point 185. In some embodiments, support tube 140 is coupled to head tube assembly 120 at other locations. For example, support tube 140 is coupled to head tube assembly 120 at a third head tube application point. The third head tube application point can be positioned between first head tube application point 170 and / or second head tube application point 180. Support tube 140 is pivotally coupled to head tube assembly 120. Support tube 140 is pivotally coupled to seat tube 125. For example, support tube 140 is coupled to seat tube 125 such that support tube 140 can pivot about a transverse axis at or near first seat tube application point 175, second seat tube application point 185, or any other seat tube application point. The support tube 140 is coupled to the head tube assembly 120 such that the support tube 140 can pivot about a transverse axis of its connection at or near the first head tube application point 170, the second head tube application point 180, or the third head tube application point 505. Each transverse axis of the connection at or near each application point 170, 175, 180, 185, 505 can be perpendicular (e.g., orthogonal) to the plane of the frame 105. For example, rotation of the support tube 140 about any transverse axis of its connection at or near any application point 170, 175, 180, 185, 505 can occur within the plane of the frame 105.

[0038] The frame 105 may include a top tube 130, a down tube 135, and a support tube 140 extending between the head tube assembly 120 and the seat tube 125. The frame 105 may also include more or fewer members extending between the head tube assembly 120 and the seat tube 125.

[0039] The frame 105 includes at least one component that connects the seat tube 125 to the rear wheel 115. For example, the frame 105 includes a seat stay 145. The seat stay 145 extends between the seat tube 125 and the rear wheel 115. The seat stay 145 is connected to the rear wheel 115 via a rear wheel application point 190. The rear wheel application point 190 may be a portion of the hub of the rear wheel 115 or another central structure of the rear wheel 115. The rear wheel application point 190 may be near or located at the center of the rear wheel 115. The seat stay 145 is connected to the seat tube 125 at a first seat tube application point 175. For example, the seat stay 145 may be connected to the seat tube 125 at the same location as the top tube 130 and / or the support tube 140. In some embodiments, the seat stay 145 is connected to the seat tube 125 at a different location. The seat stay 145 may be a single component. For example, the seat stay 145 can be a single tube extending between the seat tube 125 and the rear wheel application point 190. In some embodiments, the seat stay 145 includes multiple members. For example, the seat stay 145 includes a first member extending on a first side of the rear wheel 115 and connected to the first side of the rear wheel application point 190, and a second member extending on a second side of the rear wheel 115 and connected to the second side of the rear wheel application point 190. The first and second members of the seat stay 145 can be connected to the seat tube 125 at the same location or at different locations. For example, the first and second members of the seat stay 145 can be connected to the seat tube 125 at the first seat tube application point 175. The seat stay 145 can include a fork-shaped member extending along both sides of the rear wheel 115 (e.g., similar to the head tube assembly 120).

[0040] The seat stay 145 is pivotally coupled to the seat tube 125, which is pivotally coupled to the rear wheel 115. For example, the seat stay 145 is coupled to the seat tube 125 such that the seat stay 145 can pivot about a transverse axis of its connection at or near a first seat tube application point 175. The seat stay 145 is coupled to the rear wheel 115 such that the seat stay 145 can pivot about a transverse axis of its connection at or near a rear wheel application point 190. Each transverse axis of the connection at or near the first seat tube application point 175 and each transverse axis of the connection at or near the rear wheel application point 190 is perpendicular (e.g., orthogonal) to the plane of the frame 105. For example, rotation of the seat stay 145 about its transverse axis of connection at or near the first seat tube application point 175 or about its transverse axis at or near the rear wheel application point 190 occurs within the plane of the frame 105.

[0041] The frame 105 includes a chain stay 150. The chain stay 150 extends between the seat tube 125 and the rear wheel 115. The chain stay 150 is connected to the rear wheel 115 at a rear wheel application point 190. The chain stay 150 is connected to the seat tube 125 at a second seat tube application point 185. For example, the chain stay 150 is connected to the seat tube 125 at the same location as the down tube 135. In some embodiments, the chain stay 150 is connected to the seat tube 125 at a different location. The chain stay 150 is pivotally connected to the seat tube 125. The chain stay 150 is pivotally connected to the rear wheel 115. For example, the chain stay 150 is connected to the seat tube 125 such that the chain stay 150 can pivot about a transverse axis at or near the second seat tube application point 185. The chain stay 150 is connected to the rear wheel 115 so that the chain stay 150 can pivot about a transverse axis of its connection at or near the rear wheel application point 190. Each transverse axis of the connection at or near the second seat tube application point 185 and each transverse axis of the connection at or near the rear wheel application point 190 is perpendicular (e.g., orthogonal) to the plane of the frame 105. For example, rotation of the chain stay 150 about a transverse axis of its connection at or near the second seat tube application point 185 or about a transverse axis of its connection at or near the rear wheel application point 190 occurs within the plane of the frame 105.

[0042] In some embodiments, all points of application can pivotally connect components of the frame 105 to one another. For example, each connection at or near a point of application can be a pivot joint (e.g., a pin joint, a knuckle joint, a swivel joint, an articulated joint, a cylindrical joint, a ball joint, etc.). A pivot joint provides relative rotation about a single axis and has one degree of freedom. Other pivot joints can provide additional degrees of freedom. For example, the frame 105 includes a first head tube application point 170, a second head tube application point 180, a first seat tube application point 175, a second seat tube application point 185, a front wheel application point 160, and a rear wheel application point 190. Each connection at or near application points 160, 170, 175, 180, 185, and 190 can be a loose-fitting pivot joint. For example, the front end of the top tube 130 can have a loose-fitting connection with a transverse axis, which allows the top tube 130 to pivot about the transverse axis when not secured by other components of the frame 105 or by external forces. For example, the top tube 130, when not connected to other components, can pivot about a transverse axis of its connection at or near the first head tube application point 170 or the first seat tube application point 175. The transverse axis of the connection at or near the application point can be perpendicular to the plane of the frame 105, so that rotation about the axis occurs within the plane of the frame 105. The pivot joint can have a pin structure, with a removable pin extending through one end of a frame 105 component. The pin can define an axis of rotation about which the component can pivot. Each connection at or near the application point can be a loose-fit connection. Loose-fit connections, combined with the orientation of all components of the frame 105, can reduce (e.g., minimize to negligible values) the bending forces experienced by the components. As long as the cross-sectional dimensions of each component are sufficient, the components can maintain the structure of the frame 105 by simply resisting tensile and compressive forces.

[0043] In some embodiments, a subset of the connections at or near the point of application can be a loose pivot joint. For example, some pivot joints can be loose joints, some can be fixed (i.e., rigid), and some can include fasteners that can be tightened to prevent excessive movement of the member (e.g., vibrating around its neutral axis or moving longitudinally or laterally) or loosened to allow the connection to become a loose connection. The fasteners also can be removed from the connection to facilitate the disassembly of the vehicle frame 105. The vehicle frame 105 can have any combination of loose connections and tightened connections. In some embodiments, all connections are tightened connections. In other embodiments, all connections are fixed.

[0044] The configuration of all components of the frame 105 allows each component to maintain the structure of the frame 105 almost entirely through its tensile and / or compressive strength, rather than its bending resistance. This configuration also reduces the size of the components required to maintain the frame structure. Any material capable of withstanding the loads applied to the multi-wheeled frame 105 can be used. For example, the components can be steel tubes. The diameter of the steel tubes can be, for example, 0.25 inches to 1 inch, and the wall thickness can be 0.028 inches to 0.058 inches. The components can also be aluminum tubes, for example. The diameter of the aluminum tubes can be, for example, 0.25 inches to 1.5 inches, and the wall thickness can be 0.062 inches to 0.094 inches. For example, a steel component can be a tube with a diameter of 0.5 inches and a wall thickness of 0.028 inches, and an aluminum component can be a tube with a diameter of 0.625 inches and a wall thickness of 0.062 inches. Furthermore, the frame 105 does not require other structural components (e.g., welded joints or components with large cross-sectional areas) that add unnecessary weight to the bicycle.

[0045] Now refer to Figure 3 and Figure 4 , which shows a side view of a bicycle 100 according to an exemplary embodiment. The bicycle 100 includes at least one rear suspension mechanism, shown as a rear shock absorber 305. The rear suspension mechanism can be any type of suspension system, including, but not limited to, a shock absorber, a linkage, and a spring. A frame 105 having any of the component configurations disclosed herein can include the rear shock absorber 305. The rear shock absorber 305 can be located on any component of the frame 105 located at the rear of the bicycle 100 (e.g., behind the seat tube 125). For example, the seat stay 145 can include the rear shock absorber 305. The rear shock absorber 305 can be located anywhere on the seat stay 145. For example, the rear shock absorber 305 can be located near (e.g., within ten inches of) the first seat tube application point 175. For example, the rear shock absorber 305 can be located within six inches of the first seat tube application point 175. In some embodiments, the rear shock absorber 305 is located at the center of the seat stay 145 or closer to the rear wheel application point 190.

[0046] In some embodiments, the frame 105 includes a plurality of seat stays 145. Each of the plurality of seat stays 145 can have a rear shock absorber 305.

[0047] Now refer to Figure 5 and Figure 6, which shows a side view of bicycle 100 according to an exemplary embodiment. The support tube 140 in the frame 105 of bicycle 100 can have various orientations. For example, the support tube 140 extends between the head tube assembly 120 and the seat tube 125. The rear end of the support tube 140 is connected to at least one of the first seat tube application point 175 or the second seat tube application point 185. In some embodiments, the front end of the support tube 140 is connected to the head tube assembly 120 at a third head tube application point 505. The third head tube application point 505 can be positioned between the first head tube application point 170 and the second head tube application point 180. The third head tube application point 505 can be positioned closer to one of the first head tube application point 170 or the second head tube application point 180, or positioned between the first head tube application point 170 and the second head tube application point 180.

[0048] In some embodiments, the head tube assembly 120 includes a joint 510. The joint 510 can include a head tube joint and a steering tube joint. The head tube joint and the steering tube joint can be any type of joint. For example, the head tube joint can be a hinge, and the steering tube joint can be a universal joint or a ball gear. The combination of the head tube joint and the steering tube joint at the joint 510 can facilitate the function of the steering tube 124. For example, the steering tube joint can allow the steering tube 124 to pivot about the axis of the steering tube joint, while the head tube joint can prevent the steering tube 124 from pivoting about the steering tube joint out of the plane of the bicycle frame 105. A protective cover on the head tube joint can protect the steering tube joint from external factors.

[0049] Joint 510 defines a first portion and a second portion of head tube assembly 120. The first portion is shown as upper portion 515, and the second portion is shown as lower portion 520. Upper portion 515 includes an upper head tube 516 and an upper steerer tube 517. Upper steerer tube 517 extends from handlebar 155, through upper head tube 516, to the steerer tube joint of joint 510. Lower portion 520 includes a lower head tube 521 and a lower steerer tube 522. Lower steerer tube 522 extends from the steerer tube joint of joint 510, through lower head tube 521, to fork member 126. Joint 510, including the head tube joint and the steerer tube joint, facilitates movement between upper portion 515 and lower portion 520. For example, the combination of the head tube joint and the steerer tube joint allows upper portion 515 to move relative to lower portion 520. For example, upper portion 515 can remain stationary while lower portion 520 pivots about joint 510 within the plane of frame 105. In some embodiments, at least one of the first head tube application point 170 and the third head tube application point 505 is disposed on the upper portion 515, and the second head tube application point 180 is disposed on the lower portion 520. Members 130, 135, and 140 may be oriented such that the application points 170 and 505 are disposed on the upper portion 515, and the application point 180 is disposed on the lower portion 520. The upper portion 515 may be longer than the lower portion 520.

[0050] The bicycle 100 may include at least one front suspension mechanism, shown as a front tension spring 525. The front suspension mechanism may be any type of suspension system, including, but not limited to, a tension spring, a shock absorber, a linkage, and the like. The frame 105, having any component configuration including a head tube joint and a steering tube joint, may also include the front tension spring 525. The front tension spring 525 may be located on any component of the frame 105 located at the front of the bicycle 100 (e.g., in front of the seat tube 125). For example, the front tension spring 525 may be located on the down tube 135. The front tension spring 525 may be located anywhere on the down tube 135. For example, the front tension spring 525 may be located near the front end of the down tube 135. For example, the front tension spring 525 may be within six inches of the front end of the down tube 135. In some embodiments, the front tension spring 525 is located at the center of the down tube 135 or closer to the rear end of the down tube 135. The front tension spring 525 may be the same as or different from the rear shock absorber 305. The bicycle 100 may include the front tension spring 525 regardless of whether the frame 105 has a joint 510 located along the head tube assembly 120 .

[0051] Now refer to Figure 7 and Figure 8 , which shows a side view of bicycle 100 according to an exemplary embodiment. Bicycle 100 includes multiple suspension mechanisms. For example, bicycle 100 includes a first suspension mechanism (shown as rear shock absorber 305) and a second suspension mechanism (shown as front tension spring 525). Rear shock absorber 305 is disposed on seat stay 145. In some embodiments, rear shock absorber 305 is disposed closer to the front end of seat stay 145 than to the rear end of seat stay 145. Down tube 135 includes front tension spring 525. In some embodiments, front tension spring 525 may be disposed closer to the front end of down tube 135 than to the rear end of down tube 135. For example, front tension spring 525 may be disposed near second head tube application point 180. For example, front tension spring 525 may be within six inches of second head tube application point 180.

[0052] Now refer to Figure 9A, which shows an isometric view of a three-wheeled vehicle (shown as a Delta-type (front 1, rear 2) tricycle 900) according to an exemplary embodiment. Delta-type tricycle 900 includes a frame 905. Frame 905 can be similar to frame 105. For example, frame 905 includes a head tube assembly 120, a seat tube 125, a top tube 130, a down tube 135, and a support tube 140. Delta-type tricycle 900 includes a rear assembly 906. Rear assembly 906 can include the additional components described herein that are at least partially disposed behind the seat tube 125 of Delta-type tricycle 900. Delta-type tricycle 900 includes a front wheel 110, a first rear wheel (shown as a left rear wheel 910), and a second rear wheel (shown as a right rear wheel 915). Delta-type tricycle 900 includes a rear assembly 906. The rear assembly 906 may include additional components of the frame 905 described herein that are at least partially disposed behind the seat tube 125 of the Delta tricycle 900. The rear assembly 906 may include components of the frame 905 that house and control the two rear wheels 910,915.

[0053] The left rear wheel 910 has an axis (shown as left rear wheel axis 935), and the right rear wheel 915 has an axis (shown as right rear wheel axis 940). The left rear wheel 910 is connected to the frame 905 via the left rear wheel axis 935, and the right rear wheel 915 is connected to the frame 905 via the right rear wheel axis 940. For example, the Delta tricycle 900 may further include a rear axle 920. The rear axle 920 may extend between the left rear wheel axis 935 and the right rear wheel axis 940. The left rear wheel 910 and the right rear wheel 915 may be connected to the frame 905 via the rear axle 920. For example, the left rear wheel 910 may be connected to the frame 905 via a first end of the rear axle 920, and the right rear wheel 915 may be connected to the frame 905 via a second end of the rear axle 920. The rear axle 920 may extend between the left rear wheel 910 and the right rear wheel 915 via a plurality of rear axle tubes. For example, the frame 905 may include a first rear axle tube (shown as the left rear axle tube 922), a second rear axle tube (shown as the center rear axle tube 924), and a third rear axle tube (shown as the right rear axle tube 926). The left rear axle tube 922 may include or define a first rear axle point 960. The center rear axle tube 924 may include or define a second rear axle point 965. The right rear axle tube 926 may include or define a third rear axle point 970. The rear axle 920 may extend through the left rear axle tube 922, the center rear axle tube 924, and the right rear axle tube 926. In some embodiments, the frame 905 may include only the left rear axle tube 922 and the right rear axle tube 926. For example, the left rear axle tube 922 may extend between the second rear axle point 965 and the first rear axle point 960 (and may extend beyond the first rear axle point 960). The right rear axle tube 926 can extend between the second rear axle application point 965 and the third rear axle application point 970 (and can extend beyond the third rear axle application point 970). In this way, the left rear axle tube 922 can be connected to the right rear axle tube 926 at the second rear axle application point 965.

[0054] Frame 905 also includes a first leg tube (shown as left leg tube 945), a seat stay (shown as seat stay 950), and a second leg tube (shown as right leg tube 955). The first end of left leg tube 945 may be connected to or integrally formed with left rear axle tube 922 at a first rear axle application point 960. First rear axle application point 960 may be located near the first end of rear axle 920. The first end of seat stay 950 may be connected to or integrally formed with center rear axle tube 924 at a second rear axle application point 965. Second rear axle application point 965 may be located near the center of rear axle 920. The first end of right leg tube 955 may be connected to or integrally formed with right rear axle tube 926 at a third rear axle application point 970. Third rear axle application point 970 may be located near the second end of rear axle 920. The second end of the seat stay 950 and the second end of each leg tube 945, 955 can be connected to the seat tube 125 or integral with the seat tube 125. For example, the second end of the seat stay 950 and the second end of each leg tube 945, 955 can be connected to the seat tube 125 via a first seat tube application point 175. The frame 905 also includes a chain stay 150, which extends between the rear seat tube 125 and the rear axle. The chain stay 150 can extend between a second seat tube application point 185 and a second rear axle application point 965.

[0055] The frame 905 may also include a tail pipe 975. The tail pipe 975 is connected to or integral with one of the left rear axle tube 922 (e.g., when the rear gear is on the right side of the frame 905), the center rear axle tube 924, or the right rear axle tube 926 (e.g., when the rear gear is on the left side of the frame 905). For example, the tail pipe 975 may be connected to one of the left rear axle tube 922, the center rear axle tube 924, or the right rear axle tube 926 via the second rear axle point 965. The tail pipe 975 may extend rearward (e.g., away from the front of the Delta tricycle 900) from one of the left rear axle tube 922, the center rear axle tube 924, or the right rear axle tube 926. The tail pipe 975 may extend parallel to the chain stay 150. The frame 905 may also include a first tail stay (shown as a left tail stay 980) and a second tail stay (shown as a right tail stay 985). The first end of left tail strut 980 may be connected to or integrally formed with left rear axle tube 922. For example, the first end of left tail strut 980 may be connected to left rear axle tube 922 via first rear axle application point 960. The first end of right tail strut 985 may be connected to or integrally formed with right rear axle tube 926. For example, the first end of right tail strut 985 may be connected to right rear axle tube 926 via third rear axle application point 970. The second end of left tail strut 980 may be connected to or integrally formed with the second end of right tail strut 985 at tail application point 990. Tail pipe 975 may be connected to or integrally formed with the second end of each tail strut 980, 985. For example, tail pipe 975 may be connected to tail struts 980, 985 via tail application point 990.

[0056] The frame 905 of the Delta tricycle 900 can employ any frame configuration disclosed herein. For example, the frame 905 can include any number of suspension mechanisms (e.g., shock absorbers 305, tension springs 525), and the support tubes 140 can be arranged in any number of different orientations. The frame 905 can include a first rear shock absorber 305 disposed on the left leg tube 945, a second rear shock absorber 305 disposed on the seat stay 950, and a third rear shock absorber 305 disposed on the right leg tube 955. In some embodiments, the rear shock absorbers 305 may be provided only on the left leg tube 945 and the right leg tube 955. The frame 905 can also include a front tension spring 525 disposed on the down tube 135.

[0057] The vehicle frame 905 may include one or more joints 928. Joints 928 may be similar to joints 510 or may be constant velocity joints. The vehicle frame 905 may include a first joint 928 and a second joint 928 disposed between a first rear axle point 960 and a second rear axle point 965 on the rear axle 920, and a third joint 928 and a fourth joint 928 disposed between the second rear axle point 965 and a third rear axle point 970 on the rear axle 920. These joints 928 may maintain each rear wheel 910, 915 in a substantially vertical position.

[0058] The rear end of support tube 140 may be coupled to seat tube 125 via first seat tube application point 175, and the front end thereof may be coupled to either second head tube application point 180 or third head tube application point 505. In some embodiments, the rear end of support tube 140 may be coupled to seat tube 125 via second seat tube application point 185, and the front end thereof may be coupled to first head tube application point 170. Some or all of the connections between components of frame 905 may comprise loose-fit connections as described herein.

[0059] like Figure 9B and 9C As shown, in some embodiments, the Delta tricycle 900 may not have the joint 928. In some embodiments, a shock absorber 305 may be provided on the seat stay 950. The shock absorber 305 on the seat stay 950 may provide a non-independent suspension system for the Delta tricycle 900. In some embodiments, the Delta tricycle 900 may not have the shock absorber 305.

[0060] Now refer to Figure 10, which shows an isometric view of a three-wheeled vehicle (shown as a Tadpole tricycle 1000) according to an exemplary embodiment. Tadpole tricycle 1000 (2 front, 1 rear) includes a frame 1005. Similar to Delta tricycle 900, Tadpole tricycle 1000 can employ any frame configuration disclosed herein. For example, frame 1005 can be similar to frame 105. For example, frame 1005 includes a head tube assembly 120, a seat tube 125, a top tube 130, a down tube 135, and a support tube 140. Tadpole tricycle 1000 includes a first front wheel (shown as a right front wheel 1010), a second front wheel (shown as a left front wheel 1015), and a rear wheel 115. Tadpole tricycle 1000 includes a front assembly 1006. The front assembly 1006 may include additional components of the frame 1005 described herein that are positioned near the front of the tadpole tricycle 1000 (e.g., in front of the seat tube 125 and / or near the head tube assembly 120). The front assembly 1006 may include components of the frame 1005 that house and control the two front wheels 1010, 1015.

[0061] Vehicle frame 1005 also includes a first front axle tube (shown as right front axle tube 1022) and a second front axle tube (shown as left front axle tube 1024). Right front axle tube 1022 can be connected to the left front axle tube via second head tube action point 180. A first stub axle (shown as right front stub axle 1025) can be provided at the first end of right front axle tube 1022, and a second stub axle (shown as left front stub axle 1030) can be provided at the first end of left front axle tube 1024. Right front stub axle 1025 can be connected to right front axle tube 1022, and left front stub axle 1030 can be connected to left front axle tube 1024. Right front wheel 1010 is connected to vehicle frame 1005 via right front stub axle 1025, and left front wheel 1015 is connected to vehicle frame 1005 via left front stub axle 1030.

[0062] Vehicle frame 1005 further includes a first arm tube (shown as right arm tube 1045) and a second arm tube (shown as left arm tube 1050). The first end of right arm tube 1045 may be connected to or integral with right front axle tube 1022 at a first front axle application point (shown as right front axle application point 1055). Right front axle application point 1055 may be located near the first end of right front axle tube 1022. The first end of left arm tube 1050 may be connected to or integral with left front axle tube 1024 at a second front axle application point (shown as left front axle application point 1060). Left front axle application point 1060 may be located near the first end of left front axle tube 1024. The second ends of right arm tube 1045 and left arm tube 1050 may be connected to or integral with head tube assembly 120. For example, the second end of each arm tube 1045, 1050 may be connected to head tube assembly 120 via first head tube application point 170.

[0063] The frame 1005 also includes a nose tube 1090. The nose tube 1090 is coupled to the head tube 122. For example, a first end of the nose tube 1090 can be coupled to the head tube 122 via the second head tube application point 180. The nose tube 1090 can extend forward from the head tube 122 (e.g., away from the rear of the vehicle 1100). The nose tube 1090 can extend parallel to the down tube 135. The frame 1105 can also include a first nose tube brace (shown as a right nose tube brace 1092) and a second nose tube brace (shown as a left nose tube brace 1094). The right nose tube brace 1092 can be coupled to the right front axle tube 1022. For example, a first end of the right nose tube brace 1092 can be coupled to the right front axle tube 1022 via the right front axle application point 1055. The left nose tube brace 1094 can be coupled to the left front axle tube 1024. For example, the first end of the left nose tube brace 1094 can be connected to the left front axle tube 1024 through the left front axle application point 1060. The second end of the nose tube 1090 can be connected or integrated with the second end of the right nose tube brace 1092 and the second end of the left nose tube brace 1094 at the nose tube application point 1096.

[0064] Frame 1005 also includes a tie rod 1065. Tie rod 1065 may be positioned behind right nose brace 1092 and left nose brace 1094. Tie rod 1065 includes a first steering arm (shown as right steering arm 1070) and a second steering arm (shown as left steering arm 1075). Right steering arm 1070 may be connected to right front stub axle 1025 at or near right front axle application point 1055, while left steering arm 1075 may be connected to left front stub axle 1030 at or near left front axle application point 1060. The bottom end of steering tube 124 (or lower steering tube 522) may be connected to tie rod 1065 at tie rod application point 1080. Tie rod application point 1080 may be positioned near the center of tie rod 1065. In some embodiments, tie rod application point 1080 divides tie rod 1065 into a first portion and a second portion, with the first portion being connected to the second portion via tie rod application point 1080. Steering tube 124, tie rod 1065, right steering arm 1070, left steering arm 1075, right front stub axle 1025, and left front stub axle 1030 facilitate steering of Tadpole tricycle 1000. The connections between steering tube 124, tie rod 1065, right steering arm 1070, left steering arm 1075, right front stub axle 1025, and left front stub axle 1030 can be any connection that facilitates movement between the components to achieve proper steering of Tadpole tricycle 1000. For example, frame 1005 can include multiple ball joints to allow steering tube 124 to control the movement of right front wheel 1010 and left front wheel 1015. For example, ball joints may be provided at the connection between the right steering arm 1070 and the tie rod 1065, at the connection between the left steering arm 1075 and the tie rod 1065, and on both sides of the connection between the steering tube 124 and the tie rod 1065. Hinges may be provided on the right front stub axle 1025 and the left front stub axle 1030 near the right front axle application point 1055 and the left front axle application point 1060. The steering tube 124, the tie rod 1065, and the tie rod application point 1080 may form a rack and pinion steering mechanism, such that when the steering tube 124 rotates, the steering tube 124 rotates a pinion, which in turn engages with the teeth of a rack (e.g., the tie rod 1065), thereby steering the front wheels 1010 and 1015. Some or all of the connections between the components of the frame 1005 may comprise loose-fit connections as described herein.

[0065] Now refer to Figure 11, which shows an isometric view of a four-wheeled vehicle (shown as four-wheeled vehicle 1100) according to an exemplary embodiment. Four-wheeled vehicle 1100 includes a frame 1105, which can be constructed by combining frame components of bicycle 100 and tricycles 900, 1000. For example, four-wheeled vehicle 1100 may include a rear assembly 906 and a front assembly 1006. For example, four-wheeled vehicle 1100 may include two front wheels 1010, 1015 and two rear wheels 910, 915 and corresponding components. For example, frame 1105 may include a rear axle 920, seat stays 950, leg tubes 945, 955, tail pipe 975, and tail stays 980, 985 to accommodate rear wheels 910, 915. The frame 1105 may include right and left front axle tubes 1022 and 1024, arm tubes 1045 and 1050, a tie rod 1065, steering arms 1070 and 1075, a nose tube 1090, and nose tube braces 1092 and 1094 to accommodate the front wheels 1010 and 1015. The frame 1105 may include a head tube assembly 120, a seat tube 125, a top tube 130, a down tube 135, and a support tube 140 to connect the front wheels 1010 and 1015 with the rear wheels 910 and 915.

[0066] Now refer to Figure 12 , which shows an isometric view of a four-wheeled vehicle 1100 according to an exemplary embodiment. The frame 1105 of the four-wheeled vehicle 1100 can employ any frame configuration disclosed herein. For example, the frame 1105 can include any number of suspension mechanisms (e.g., shock absorbers 305, tension springs 525), and the support tubes 140 can be arranged in any number of different orientations. For example, the frame 1105 can include a first rear shock absorber 305 disposed on the left leg tube 945, a second rear shock absorber 305 disposed on the seat stay 950, and a third rear shock absorber 305 disposed on the right leg tube 955. The frame 1105 can include a first shock absorber 305 disposed on the left arm tube 1050 and a second shock absorber 305 disposed on the right arm tube 1045. The rear end of the support tube 140 can be connected to the seat tube 125 via the first seat tube application point 175, and the front end can be connected to either the second head tube application point 180 or the third head tube application point 505. In some embodiments, the rear end of support tube 140 may be connected to seat tube 125 via second seat tube application point 185, and the front end may be connected to first head tube application point 170. Some or all of the connections between components of frame 1105 may include loose-fit connections as described herein.

[0067] Any vehicle, including the vehicles described herein (e.g., bicycle 100, Delta tricycle 900, Tadpole tricycle 1000, quadricycle 1100), may include a seat 165. The seat 165 may be connected to or integral with the seat post 128. Figure 12As shown in the figures, seat 165 may have an elongated shape. For example, seat 165 may have a (transverse) length 1205 and a (longitudinal) width 1210. Length 1205 may be greater than width 1210. In some embodiments, length 1205 may be four times greater than width 1210. For example, length 1205 may be approximately 13 inches (+ / - 1 inch) and width 1210 may be approximately 3 inches (+ / - 1 inch). Seat 165 may have any shape. For example, seat 165 may have a cylindrical shape. Seat 165 may extend along a single central axis 1215. Seat 165 may extend symmetrically about central axis 1215. For example, the cross-sectional shape of seat 165 may be symmetrical relative to central axis 1215. Seat 165 may extend substantially perpendicular (+ / - 10%) to the plane of the frame. For example, seat 165 may be substantially perpendicular to at least one of top tube 130, support tube 140, or down tube 135. For example, the length 1205 of the seat 165 may be perpendicular to the top tube 130 .

[0068] Now refer to Figure 13, which illustrates a pivotal working joint 1300 according to an exemplary embodiment. Pivotal working joint 1300 is an example of a pivotal joint that can be located at an application point. Any other pivotal joint may also be used to provide the desired pivotal connection point. Pivotal working joint 1300 can be located at any application point described herein (e.g., first head tube application point 170, first seat tube application point 175, etc.). Pivotal working joint 1300 includes a first frame member 1305 (e.g., head tube 122, seat tube 125) having at least one lug 1310 extending from first frame member 1305. Lug 1310 has at least one opening 1315 (e.g., a circular hole or aperture) extending therethrough. A second frame member 1320 has a U-shaped fork end 1325 configured to extend around lug 1310. For example, the U-shaped clevis end 1325 may include a first prong 1330 extending along a first side of the lug 1310 and a second prong 1335 extending along a second side of the lug 1310. The U-shaped clevis end 1325 has a hole 1340 extending through both prongs 1330 and 1335. The hole 1340 is configured to align with the opening 1315 of the lug 1310. A pin 1345 is configured to pass through the U-shaped clevis end and the lug 1310 when the opening 1315 is aligned with the hole 1340. For example, the pin 1345 may pass through the hole 1340 of the first prong 1330, the opening of the lug 1310, and the hole 1340 of the second prong 1335 to connect the lug 1310 and the U-shaped clevis end 1325 together. A cotter pin 1350 extends through the hole of pin 1345, perpendicular to the axis 1355 of pin 1345, to prevent pin 1345 from retracting after insertion into opening 1315 and hole 1340. Pin 1345 allows for a loose connection between frame members. For example, pin 1345 facilitates rotation of second frame member 1320 about axis 1355. This rotation can occur in the same plane as first frame member 1305. The use of cotter pin 1350 allows pin 1345 to be removed from U-shaped clevis end 1325, thereby allowing for tool-free disassembly of frame 105, 905, 1005.

[0069] Now refer to Figure 14, which illustrates a method 1400 for assembling a multi-wheeled vehicle frame according to an exemplary embodiment, which can be used to assemble bicycle 100, Delta tricycle 900, Tadpole tricycle 1000, and quadricycle 1100. Method 1400 includes connecting top tube 130 to seat tube 125 and head tube assembly 120 (step 1405), connecting down tube 135 to seat tube 125 and head tube assembly 120 (step 1410), and connecting support tube 140 to seat tube 125 and head tube assembly 120 (step 1415). Step 1405 may include pivotally connecting top tube 130 to seat tube 125 and pivotally connecting top tube 130 to head tube assembly 120. Top tube 130 may be connected to head tube assembly 120 at first head tube application point 170. Top tube 130 may be connected to seat tube 125 at first seat tube application point 175.

[0070] Step 1410 may include pivotally coupling the down tube 135 to the seat tube 125 and pivotally coupling the down tube 135 to the head tube assembly 120. The down tube 135 may be coupled to the head tube assembly 120 at a second head tube impact point 180. The down tube 135 may be coupled to the seat tube 125 at a second seat tube impact point 175.

[0071] Step 1415 may include pivotally coupling the support tube 140 to the seat tube 125 and pivotally coupling the support tube 140 to the head tube assembly 120. The support tube 140 may be coupled to the seat tube 125 at one of the first seat tube action point 175 or the second seat tube action point 185. The support tube 140 may be coupled to the head tube assembly 120 at the first head tube action point 170, the second head tube action point 180, or the third head tube action point 505.

[0072] The method 1400 may also include connecting additional components to the frame 105. For example, the method 1400 may include connecting the seat stay 145 and / or the chain stay 150 to the seat tube 125. The seat stay 145 and the chain stay 150 may be pivotally connected to the seat tube 125.

[0073] The method 1400 may further include positioning at least one shock absorber 305 or an extension spring 525. For example, the method 1400 may include positioning at least one shock absorber 305 on the seat stay 145 or positioning the extension spring 525 on the down tube 135. The shock absorber 305 may be positioned closer to the front end of the seat stay 145 than to the rear end of the seat stay 145. The extension spring 525 may be positioned closer to the front end of the down tube 135 than to the rear end of the down tube.

[0074] Method 1400 may further include dividing head pipe assembly 120 into a first portion (eg, upper portion) 515 and a second portion (eg, lower portion) 520 by providing a joint 510 in head pipe assembly 120. Joint 510 may be any type of joint (eg, hinge, universal joint).

[0075] As used herein, the terms "about," "approximately," "approximately," "substantially," and similar terms are intended to have a broad meaning consistent with that generally accepted by persons of ordinary skill in the art to which the subject matter of the present disclosure belongs. Persons skilled in the art who review this disclosure should understand that these terms are intended to allow a description of certain features described and claimed without limiting the scope of those features to the precise numerical ranges provided. Accordingly, these terms should be interpreted as indicating that insubstantial or inconsequential modifications or alterations of the subject matter described and claimed are considered to be within the scope of the disclosure as recited in the appended claims.

[0076] It should be noted that the term "exemplary" and variations thereof, used herein to describe various embodiments, are intended to indicate that such embodiments are possible examples, representatives, or illustrations (these terms are not intended to imply that such embodiments are necessarily particular or best examples).

[0077] As used herein, the term "connected" and variations thereof refer to the direct or indirect attachment of two components to one another. Such attachment may be fixed (e.g., permanent or fixed) or removable (e.g., removable or releasable). Such attachment may be achieved by directly attaching the two components to one another, by using a separate intermediate component and any additional intermediate components attached to one another, or by using an intermediate component that is integrally formed as a single unitary body with one of the two components. If "connected" or variations thereof are modified by an additional term (e.g., "directly connected"), the general definition of "connected" described above is modified by the literal meaning of the additional term (e.g., "directly connected" means that the two components are attached without any separate intermediate component), thereby creating a narrower definition than the general definition of "connected" described above. Such connections may be mechanical, electrical, or fluidic.

[0078] As used herein, the term "or" is used in its inclusive sense (not exclusive sense), so when used to connect a list of elements, the term "or" means one, some, or all of the elements in the list. Connective language such as "at least one of X, Y, and Z" should be understood to indicate that the element can be X, can be Y, can be Z, can be X and Y, can be X and Z, can be Y and Z, or can be X, Y, and Z (i.e., any combination of X, Y, and Z), unless otherwise expressly stated. Therefore, such connective language is generally not intended to imply that certain embodiments require the presence of at least one X, at least one Y, and at least one Z, unless otherwise stated.

[0079] References herein to element positions (e.g., "top," "bottom," "front," "rear," "above," and "below") are intended solely to describe the orientation of various elements in the accompanying drawings. For example, the orientation may be based on a user's perspective facing the front of a multi-wheeled vehicle. It should be noted that the orientation of various elements may differ according to other exemplary embodiments, and such variations are intended to be within the scope of this disclosure.

[0080] Although the drawings and description may show a particular order of method steps, unless otherwise specified above, the order of such steps may vary from that depicted and described. Furthermore, unless otherwise specified above, two or more steps may be performed concurrently or with partial concurrence. Such variations may depend, for example, on the software and hardware systems selected and on the designer's choice. All such variations are within the scope of the present disclosure.

[0081] It is important to note that the construction and arrangement of bicycle 100 and its systems and components shown in the various exemplary embodiments are illustrative only. Furthermore, any element disclosed in one embodiment may be combined or utilized with any other embodiment disclosed herein. While only one example of how elements from one embodiment may be combined or utilized with another embodiment has been described above, it should be understood that other elements from various embodiments may be combined or utilized with any other embodiment disclosed herein.

Claims

1. A frame for a multi-wheeled vehicle, the frame comprising: Head component; a seat member disposed away from the head member; an upper member pivotally connected to the seat member and to the head member; a support member pivotally connected to the seat member and pivotally connected to the head member; as well as A lower member is pivotally connected to the seat member and to the head member.

2. The frame according to claim 1, wherein: The upper member is pivotally connected to the seat member at a first seat member action point and is pivotally connected to the head member at a first head member action point; The lower member is pivotally connected to the seat member at a second seat member action point and is pivotally connected to the head member at a second head member action point; as well as The support member is pivotally connected to the seat member at a second seat member action point and is pivotally connected to the head member at a first head member action point.

3. The frame of claim 1 , wherein the frame defines a plane passing through the head member, seat member, upper member, and support member, the frame further comprising: A seat post extends into the seat component and is connected to a seat. The seat is elongated and has a first elongated portion extending outward from the plane and a second elongated portion extending outward from the plane and opposite to the first elongated portion.

4. The frame according to claim 1, wherein: The upper member is pivotally connected to the seat member at a first seat member action point and is pivotally connected to the head member at a first head member action point; The lower member is pivotally connected to the seat member at a second seat member action point and is pivotally connected to the head member at a second head member action point; as well as The support member is pivotally connected to the seat member at a first seat member action point and is pivotally connected to the head member at a second head member action point.

5. The frame of claim 4, further comprising a front assembly, the front assembly comprising: a first front axle member pivotally connected to the head member at a second head member action point; a second front axle member pivotally connected to the head member at a second head member action point, the second front axle member being opposite to the first front axle member; a first arm member pivotally connected to the head member at a first head member action point and pivotally connected to the first front axle member at a first front axle action point; a second arm member pivotally connected to the head member at a first head member action point and pivotally connected to the second front axle member at a second front axle action point; a nose member pivotally connected to the head member at a second head member action point and extending away from the lower member; a first nose support member pivotally connected to the first front axle member at a first front axle action point and pivotally connected to the nose member at a nose member action point; as well as a second nose support member pivotally connected to the second front axle member at a second front axle application point and pivotally connected to the nose member at a nose member application point; The front assembly connects a plurality of front wheels to the vehicle frame.

6. The frame of claim 5, wherein the front assembly further comprises: A steering member including a first end and a second end, wherein the first end of the steering member is connected to the handlebar and the second end is connected to a steering tie rod, wherein the steering tie rod includes a first steering arm and a second steering arm, wherein: The first steering arm is connected to a first front stub axle, and the first front stub axle is pivotally connected to the first front axle member at or near a first front axle application point; and The second steering arm is connected to the second front stub shaft, and the second front stub shaft is pivotally connected to the second front axle member at or near the second front axle application point.

7. The frame of claim 1, wherein: The upper member is pivotally connected to the head member at a first head member action point; The lower member is pivotally connected to the head member at a second head member action point; The head member includes a first portion and a second portion; as well as The first head component action point and the third head component action point are arranged on the first portion, and the second head component action point is arranged on the second portion.

8. The frame according to claim 7, wherein: The upper member is pivotally connected to the seat member at a first seat member action point; The lower member is pivotally connected to the seat member at a second seat member action point; as well as The support member is pivotally connected to the seat member at a second seat member action point and is pivotally connected to the head member at a third head member action point.

9. The frame according to claim 7, wherein: The upper member is pivotally connected to the seat member at a first seat member action point; The lower member is pivotally connected to the seat member at a second seat member action point; as well as The support member is pivotally connected to the seat member at a first seat member action point and is pivotally connected to the head member at a third head member action point.

10. The frame of claim 9 further comprising a seat fork and a chain fork, the seat fork being pivotally connected to the seat member at a first seat member action point and being pivotally connected to a rear wheel action point, the chain fork being pivotally connected to the seat member at a second seat member action point and being pivotally connected to the rear wheel action point.

11. The bicycle frame according to claim 10, further comprising a rear shock absorber connected to the seat stay.

12. The frame according to claim 10, further comprising: fork-shaped member; as well as A steering member connected to the fork member, the steering member comprising: an upper steering member connected to the handlebar and the joint, the upper steering member passing through the upper head member of the head member; a lower steering member connected to the joint and the fork member, the lower steering member passing through the lower head member of the head member; Wherein, the fork-shaped member connects the front wheel to the frame.

13. The vehicle frame of claim 12, further comprising a front suspension mechanism connected to the lower member.

14. The frame of claim 10, further comprising a rear assembly, the rear assembly comprising: a plurality of rear axle members including a first rear axle member, a second rear axle member, and a third rear axle member; a plurality of leg members pivotally connected to the seat member at a first seat member application point, and each of the leg members pivotally connected to one of the plurality of rear axle members; a tail member pivotally connected to the chain stay at a rear axle action point, the tail member extending away from the chain stay; a first tail support member pivotally connected to the second rear axle member and pivotally connected to the tail member at a tail application point; a second tail support member pivotally connected to the third rear axle member and pivotally connected to the tail member at a tail action point; The rear assembly connects a plurality of rear wheels to the vehicle frame.

15. The frame of claim 14, further comprising a plurality of pivot joints disposed at or near at least one of the following points of action: The first seat member action point or the second seat member action point, The first head component action point, the second head component action point or the third head component action point, The first front axle action point or the second front axle action point, The nose component action point, Rear wheel action point, The first rear axle action point or the second rear axle action point, or Tail action point; in, Each of the plurality of pivot joints includes a pin defining an axis of rotation for at least one of the following members: an upper member, a lower member, a support member, a first front axle member, a second front axle member, a first arm member, a second arm member, a nose member, a first nose strut member, a second nose strut member, a first rear axle member, a second rear axle member, a third rear axle member, a plurality of leg members, a tail member, a first tail strut member, or a second tail strut member.

16. The frame of claim 15, wherein the plurality of leg members comprises a first leg member and a second leg member, the frame further comprising: a first shock absorber connected to the first leg member, and A second shock absorber is connected to the second leg member.

17. A method of assembling a multi-wheeled vehicle, the method comprising: pivotally connecting the upper member to the seat member and the head member; pivotally connecting the lower member to the seat member and the head member; as well as A support member is pivotally connected to the seat member and the head member.

18. The method according to claim 17, further comprising: pivotally connecting the upper member to the seat member at a first seat member action point; pivotally connecting the upper member and the support member to the head member at a first head member action point; pivotally connecting the lower member to the head member at a second head member action point; as well as The lower member and the support member are pivotally connected to the seat member at a second seat member action point.

19. The method according to claim 17, further comprising: pivotally connecting the upper member and the support member to the seat member at a first seat member action point; pivotally connecting the upper member to the head member at a first head member action point; pivotally connecting the lower member and the support member to the head member at a second head member action point; as well as The lower member is pivotally connected to the seat member at a second seat member action point.

20. A multi-wheeled vehicle comprising: Head component; a seat member disposed away from the head member; an upper member pivotally connected to the seat member and to the head member; a support member pivotally connected to the seat member and pivotally connected to the head member; a lower member pivotally connected to the seat member and to the head member; a seat stay having a first end and a second end, the first end of the seat stay being connected to the seat member at a first position; A chain stay has a first end and a second end, wherein the first end of the chain stay is connected to the seat member at a second position, and the second end of the chain stay is connected to the second end of the seat stay.

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