Three-wheeled bicycle

Abstract

This application relates to a tricycle. The tricycle includes a vehicle body frame (10), a folding mechanism (70), two first wheels (20), one second wheel (30), and a caster assembly (80). The vehicle body frame (10) includes a first frame body (11) and a second frame body (12) connected to each other. The folding mechanism (70) connects the first frame body (11) and the second frame body (12). The first frame body (11) and the second frame body (12) are folded or unfolded by the folding mechanism (70). The two first wheels (20) are mounted on the first frame body (11). One second wheel (30) is mounted on the second frame body (12). The caster assembly (80) is mounted on the first frame body (11) or the second frame body (12) and can move relative to the second frame body (12) to switch between a first position and a second position.

Description

Technical Field

[0001] (Cross - reference to related applications) This application claims the priority of a Chinese patent application with the application number 202210931522.8 and the title "Three - wheel Bicycle", which was filed on August 4, 2022, and the entire content thereof is incorporated herein by reference.

[0002] This application relates to the technical field of bicycles, and particularly to three - wheel bicycles.

Background Art

[0003] A bicycle is a means of transportation that uses pedaling as power and is environmentally friendly. Bicycles generally include two - wheel bicycles and three - wheel bicycles. Three - wheel bicycles are used for carrying goods and people and are widely used in daily life.

[0004] However, due to the large volume of the body of a three - wheel bicycle, it is necessary to occupy a large space during storage when not in use, which brings inconvenience to storage.

Summary of the Invention

Problems to be Solved by the Invention

[0005] Based on this, in view of the problem that the storage of conventional three - wheel bicycles is inconvenient, it is necessary to provide a three - wheel bicycle that is convenient for storage.

Means for Solving the Problems

[0006] A three - wheel bicycle, comprising a body frame, a folding mechanism, a first wheel, a second wheel, and a caster assembly, wherein the body frame includes a first frame body and a second frame body connected to each other, the folding mechanism connects the first frame body and the second frame body, and the first frame body and the second frame body are folded or unfolded by the folding mechanism. The two first wheels are mounted on the first frame body, One of the aforementioned second wheels is mounted on the second frame body, The caster assembly is mounted on the vehicle frame and is movable relative to the vehicle frame to switch between a first position and a second position. The caster assembly includes a caster, and when the caster assembly is in the first position, the two first wheels and the second wheel form a first support surface that supports the three-wheeled bicycle, while when the caster assembly is in the second position, the two first wheels and the caster form a second support surface that supports the three-wheeled bicycle.

[0007] In one embodiment, the first frame body includes a first main beam and a first fork, the first fork being hinged to the first main beam, the first wheel being connected to the first fork, the three-wheeled bicycle further includes a cabin, the cabin being attached to the first fork, the second frame body includes a second main beam and a second fork connected to each other, the second wheel being connected to the second fork, and the folding mechanism connecting the first main beam and the second main beam.

[0008] In one embodiment, the first frame further includes a first vertical tube connected to the first main beam, and the three-wheeled bicycle includes a handle, the handle being rotatably mounted on the first vertical tube.

[0009] In one embodiment, the three-wheeled bicycle further includes a quick release, which is connected to the first vertical tube and can be switched between a first state and a second state relative to the first vertical tube, where, when the quick release is in the first state, the quick release allows the handle to move relative to the first vertical tube, and where the quick release is in the second state, the quick release restricts the handle to move relative to the first vertical tube.

[0010] In one embodiment, the second frame further includes a second vertical tube, a connecting tube, and a connecting part, wherein the second vertical tube is connected to either the second main beam or the second fork, the connecting tube is connected to either the second main beam or the second vertical tube, the connecting part is connected to the connecting tube, the caster assembly is hinged to the connecting part, and the three-wheeled bicycle further includes a saddle, the saddle is attached to the second vertical tube.

[0011] In one embodiment, when the three-wheeled bicycle is in a folded state, the first main beam and the second main beam are provided at an acute angle, and the extending direction of the first main beam is inclined with the extending direction of the axis of the first wheel.

[0012] In one embodiment, the three-wheeled bicycle further includes a compartment, which is attached to the first frame body, and when the three-wheeled bicycle is in an unfolded state, the lowest part of the compartment is lower than the axis position of the first wheel.

[0013] In one embodiment, the three-wheeled bicycle further includes a compartment, which is attached to the first frame body and is detachably connected to the first frame body, and when the three-wheeled bicycle is in a folded state, the remaining part of the three-wheeled bicycle can be housed in the compartment.

[0014] In one embodiment, the three-wheeled bicycle further includes a hinge shaft, the hinge shaft is connected to the first frame body or the second frame body, the caster assembly is hinged to the first frame body or the second frame body via the hinge shaft, the caster assembly further includes a connecting shaft, a shaft sleeve, and an elastic member, one end of the connecting shaft is hinged to the hinge shaft, the caster holder is rotatably provided on the other end of the connecting shaft, a position-regulating projection is provided on the outer surface of the connecting shaft, the elastic member and the shaft sleeve are both fitted outside the connecting shaft, the elastic member is compressed between the shaft sleeve and the position-regulating projection, and when the caster assembly is in the first and second positions, the shaft sleeve abuts against the second frame body to regulate its position.

[0015] In one embodiment, the second frame body is provided with a first position restricting surface and a second position restricting surface. When the caster assembly is in the first position, the end face of the shaft sleeve away from the elastic member contacts the first position restricting surface, restricting the caster assembly from switching from the first position to the second position. When the caster assembly is in the second position, the end face of the shaft sleeve away from the elastic member contacts the second position restricting surface, restricting the caster assembly from switching from the second position to the first position.

[0016] In one embodiment, the first frame body includes a first main beam and a first fork, the first fork being hinged to the first main beam, and the first wheel being connected to the first fork; the second frame body includes a second main beam and a second fork connected to each other, the second wheel being connected to the second fork; and the folding mechanism connects the first main beam and the second main beam.

[0017] In one embodiment, the folding machine includes a first joint, a second joint, and a handle, wherein the first joint is hinged to the second joint, the handle is hinged to either the first or second joint, the first joint is connected to the first main beam, and the second joint is connected to the second main beam.

[0018] In one embodiment, when the three-wheeled bicycle is in a folded state, the extension direction of the second main beam is substantially parallel to the extension direction of the axis of the first wheel.

[0019] In one embodiment, the first frame further includes a first vertical tube and an inclined support tube, the first vertical tube being connected to the first main beam, and the inclined support tube being diagonally supported between the first main beam and the first vertical tube.

[0020] In one embodiment, the second frame further includes a second vertical tube, the second vertical tube being connected to the second main beam, and the three-wheeled bicycle further includes a motor system, the motor system being mounted in a mounting space formed by the second vertical tube and the second main beam. [Brief explanation of the drawing]

[0021] To more clearly illustrate the embodiments of this application or the technical concepts in the prior art, the following drawings, which are necessary for describing the embodiments or the prior art, are briefly introduced. Clearly, the drawings in the following description are merely embodiments of this application, and those skilled in the art can obtain embodiments of other drawings based on the disclosed drawings without expending any creative effort. [Figure 1] This is a perspective view of a three-wheeled bicycle according to one embodiment of the present invention in an unfolded state. [Figure 2] Figure 1 is a side view of the three-wheeled bicycle shown. [Figure 3] Figure 1 is a front view of the three-wheeled bicycle shown. [Figure 4] Figure 1 is a perspective view of the three-wheeled bicycle in its folded state. [Figure 5] It is another perspective view of the tricycle shown in FIG. 4. [Figure 6] It is a plan view of the tricycle shown in FIG. 4. [Figure 7] It is a structural view in which other parts of the tricycle shown in FIG. 1 are mounted in its cab. [Figure 8] It is another perspective view of the tricycle shown in FIG. 4. [Figure 9] It is yet another perspective view of the tricycle shown in FIG. 4. [Figure 10] It is a perspective view when the tricycle according to another embodiment of the present application is in the deployed state. [Figure 11] It is another perspective view of the tricycle shown in FIG. 10. [Figure 12] It is an enlarged view of portion A of the tricycle shown in FIG. 10. [Figure 13] It is an enlarged view of portion B of the tricycle shown in FIG. 11.

Mode for Carrying Out the Invention

[0022] Hereinafter, referring to the drawings in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by those skilled in the art without creative labor based on the embodiments in the present application shall fall within the protection scope of the present application.

[0023] In the description of the present application, the orientation or positional relationship indicated by terms such as "center", "vertical direction", "horizontal direction", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial direction", "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings, and is only for simplifying the description of the present application, and does not indicate or imply that the mentioned device or component must have a specific orientation and be structured and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present application.

[0024] Furthermore, the terms "first" and "second" are merely descriptive and should not be understood as indicating or implying relative importance, or implicitly indicating the number of designated technical features. Therefore, the "first" and "second" features may explicitly or implicitly include at least one such feature. In this description, "plural" means at least two, for example, two, three, etc., unless otherwise specified.

[0025] In this application, unless otherwise specified, terms such as "attached," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, removable connections, integral connections, mechanical connections, electrical connections, direct connections, indirect connections via an intermediate medium, internal communication between two elements, or interaction relationships between two elements. Those skilled in the art will be able to understand the specific meaning of these terms in this application based on the specific circumstances.

[0026] In this application, unless otherwise specified, the presence of a first feature "above" or "below" a second feature may mean that the first and second features are in direct contact, or that they are indirectly in contact via an intermediate medium. Furthermore, the presence of a first feature "above," "above," and "upper side" of a second feature may simply indicate that the first feature is directly above or diagonally above the second feature, or that the horizontal height of the first feature is greater than that of the second feature. The presence of a first feature "below," "below," and "below side" of a second feature may simply indicate that the first feature is directly below or diagonally below the second feature, or that the horizontal height of the first feature is less than that of the second feature.

[0027] When one element is referred to as "fixed" or "attached" to the other element, it may be in direct contact with the other element, or an intermediate element may be present. When one element is considered to be "connected" to the other element, it may be directly connected to the other element, or an intermediate element may be present simultaneously. The terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this text are for illustrative purposes only and do not represent the only possible embodiments.

[0028] Referring to Figure 1, one embodiment of the present invention provides a three-wheeled bicycle 100 including a body frame 10, two first wheels 20, and one second wheel 30. Both the first wheel 20 and the second wheel 30 are mounted on the body frame 10. Specifically, the two first wheels 20 are mounted coaxially. In the direction of travel of the three-wheeled bicycle 100, the second wheel 30 is located on the same side as the two first wheels 20.

[0029] In one specific embodiment, the two first wheels 20 are the front wheels of the tricycle 100, and the second wheel 30 is the rear wheel of the tricycle 100, meaning that when the tricycle 100 is moving, the second wheel 30 is positioned behind the first wheel 20. In another specific embodiment, the two first wheels 20 are the rear wheels of the tricycle 100, and the second wheel 30 is the front wheel of the tricycle 100, meaning that when the tricycle 100 is moving, the second wheel 30 is positioned in front of the first wheel 20.

[0030] The vehicle frame 10 includes a first frame body 11 and a second frame body 12 connected to each other, with the first wheel 20 mounted on the first frame body 11 and the second wheel 30 mounted on the second frame body 12.

[0031] Referring to Figure 2, the first frame body 11 includes a first main beam 111 and a first fork 112, the first fork 112 being hinged to the first main beam 111, and the first wheel 20 being connected to the first fork 112. The second frame body 12 includes a second main beam 121 and a second fork 122 connected to each other, the second main beam 121 being connected to the first main beam 111, and the second wheel 30 being connected to the second fork 122. Thus, because the first fork 112 is hinged to the first main beam 111, when the three-wheeled bicycle 100 is moving, the first fork 112 is rotatable relative to the first main beam 111, and thereby the first wheel 20 rotates relative to the second wheel 30, enabling the three-wheeled bicycle 100 to turn.

[0032] The three-wheeled bicycle 100 further includes a passenger compartment 40, which is attached to the first fork 112 for loading cargo and carrying people. When the three-wheeled bicycle is unfolded, the lowest part of the passenger compartment 40 is lower than the axis of the first wheel 20. In this way, the center of gravity of the entire three-wheeled bicycle 100 is lowered, improving the stability of the three-wheeled bicycle 100.

[0033] In one embodiment, the first frame body 11 further includes a first vertical tube 113 connected to a first main beam 111. Referring to Figures 2 and 3, the tricycle 100 further includes a handle 50, which is attached to the first vertical tube 113. The second frame body 12 further includes a second vertical tube 123, and the tricycle 100 further includes a saddle 60, which is attached to the second vertical tube 123. Thus, since the handle 50 is attached to the first frame body 11 and the saddle 60 is attached to the second frame body 12, the cyclist sits on the saddle 60 and holds the handle 50 with their hands to ride the tricycle 100. Since the first wheel 20 is attached to the first frame body 11 and the second wheel 30 is attached to the second frame body 12, the second wheel 30 is the rear wheel of the tricycle 100.

[0034] The first frame body 11 further includes an inclined support tube 114, which is diagonally supported between the first main beam 111 and the first vertical tube 113 to improve the strength of the first frame body 11. Specifically, the inclined support tube 114 is provided on the side of the first vertical tube 113 that is close to the second frame body 12.

[0035] In one embodiment, the tricycle 100 further includes a folding mechanism 70, which connects a first frame body 11 and a second frame body 12. Specifically, the folding mechanism 70 connects a first main beam 111 and a second main beam 121, and the first frame body 11 and the second frame body 12 are folded or unfolded by the folding mechanism 70. In this way, when the tricycle 100 is in use, the first frame body 11 and the second frame body 12 are unfolded by the folding mechanism 70, so that the tricycle 100 is in an unfolded state and can be used normally. When the tricycle 100 is not in use and needs to be stored, the first frame body 11 and the second frame body 12 are folded by the folding mechanism 70, so that the tricycle 100 is in a folded state and can be stored conveniently.

[0036] Referring to Figures 2 and 4, the folding mechanism 70 includes a first joint 71, a second joint 72, and a handle 73. The first joint 71 is connected to the first main beam 111, and the second joint 72 is connected to the second main beam 121. The first joint 71 is hinged to the second joint 72, and the handle 73 is hinged to either the first joint 71 or the second joint 72. The folding mechanism 70 has a close-up state and a separated state. When the folding mechanism 70 is in the close-up state, the first joint 71 and the second joint 72 are close together, and the handle 73 locks the first joint 71 and the second joint 72, at which point the first frame body 11 and the second frame body 12 unfold. When the folding mechanism 70 is in a disassembled state, the handle 73 unlocks the first joint 71 and the second joint 72, separating the first joint 71 and the second joint 72, and at this time the first frame body 11 and the second frame body 12 are folded.

[0037] Furthermore, when the tricycle 100 is unfolded, the second main beam 121 is provided at one end of the first main beam 111 in the direction of extension of the first main beam 111. Referring to Figures 5 and 6, when the tricycle 100 is folded, the first main beam 111 and the second main beam 121 are provided at an acute angle, and the direction of extension of the first main beam 111 is inclined with the direction of extension of the axis of the first wheel 20. In this way, the volume of the tricycle 100 is reduced, the space occupied by the tricycle 100 is decreased, and the storage of the tricycle 100 becomes more convenient.

[0038] Furthermore, referring to Figure 7, the storage compartment 40 is detachably connected to the first frame body 11, and when the tricycle 100 is in a folded state, the other parts of the tricycle 100 can be stored inside the storage compartment 40. In this way, storage of the tricycle 100 becomes convenient.

[0039] In one specific embodiment, referring to Figures 8 and 9, when the three-wheeled bicycle 100 is in a folded state, the extending direction of the second main beam 121 is substantially parallel to the extending direction of the axis of the first wheel 20.

[0040] Referring to Figure 2, the three-wheeled bicycle 100 further includes a caster assembly 80 mounted on a first frame body 11 or a second frame body 12, the caster assembly 80 being able to move relative to the vehicle frame 10 to switch between a first position and a second position. When the caster assembly 80 is in the first position (see Figure 2), the two first wheels 20 and the second wheel 30 form a first support surface that supports the three-wheeled bicycle 100. That is, when the three-wheeled bicycle 100 is placed on the ground, the caster assembly 80 does not push up the first wheels 20 and the second wheel 30. When the caster assembly 80 is in the second position (see Figures 10 and 11), the two first wheels 20 and the casters 81 of the caster assembly 80 form a second support surface that supports the three-wheeled bicycle 100. That is, when the three-wheeled bicycle 100 is placed on the ground, the caster assembly 80 can push up the second wheel 30.

[0041] According to the above installation, when the caster assembly 80 is in the first position, the two first wheels 20 and the second wheel 30 form a first support surface supported by the ground, and the caster assembly 80 does not come into contact with the ground and does not interfere with the normal operation of the tricycle 100. When the caster assembly 80 is in the second position, the two first wheels 20 and the caster 81 form a second support surface supported by the ground, and in this case, the second wheel 30 is pushed up by the caster 81, saving effort when folding or unfolding the tricycle 100. Furthermore, when the tricycle 100 is in the folded state, the caster 81 can move in all directions 360°, so the tricycle 100 can also be moved via the caster 81, making it easy to move the tricycle 100 when it is folded.

[0042] Referring to Figures 12 and 13, the second frame body 12 further includes a connecting pipe 124 and a connecting part 125, the connecting pipe 124 being connected to either the second main beam 121 or the second vertical pipe 123, the connecting part 125 being connected to the connecting pipe 124, and the caster assembly 80 being hinged to the connecting part 125. By connecting the connecting pipe 124 to either the second main beam 121 or the second vertical pipe 123, the connection strength between the caster assembly 80 and the second frame body 12 can be improved.

[0043] To make it clear, in some other embodiments, the connecting pipe 124 may be connected only to the second main beam 121 or the second vertical pipe 123.

[0044] The three-wheeled bicycle 100 further includes a hinge shaft 90, which is connected to a first frame body 11 or a second frame body 12, specifically, the hinge shaft 90 is connected to a connection portion 125 of the second frame body 12, and more specifically, the hinge shaft 90 is drilled into the connection portion 125. The caster assembly 80 is hinged to the first frame body 11 or the second frame body 12 via the hinge shaft 90, specifically, the caster assembly 80 further includes a connecting shaft 82, the caster 81 is connected to one end of the connecting shaft 82, and the hinge shaft 90 is drilled into the other end of the connecting shaft 82.

[0045] The caster assembly 80 further includes a shaft sleeve 83 and an elastic member 84. A position-regulating projection 821 is provided on the outer surface of the connecting shaft 82. Both the elastic member 84 and the shaft sleeve 83 are fitted onto the outside of the connecting shaft 82, and the elastic member 84 is compressed and provided between the shaft sleeve 83 and the position-regulating projection 821. When the caster assembly 80 is in the first and second positions, the shaft sleeve 83 abuts against the connecting portion 125 and is position-regulating.

[0046] With the above installation, when the caster 81 is in the first or second position, the axle sleeve 83 comes into contact with the connecting portion 125 due to the action of the elastic member 84. In this way, the caster assembly 80 is prevented from switching from the first position to the second position due to the action of gravity, and the caster assembly 80 is prevented from switching from the second position to the first position during the process of folding and unfolding the three-wheeled bicycle 100.

[0047] In one embodiment, the elastic member 84 is a spring. Naturally, in several other embodiments, the type of elastic member 84 is not limited.

[0048] Furthermore, the connecting portion 125 is provided with a first position restricting surface 1251 and a second position restricting surface 1252. When the caster assembly 80 is in the first position, the end face of the shaft sleeve 83 away from the elastic member 84 abuts against the first position restricting surface 1251, restricting the caster assembly 80 from switching from the first position to the second position. When the caster assembly 80 is in the second position, the end face of the shaft sleeve 83 away from the elastic member 84 abuts against the second position restricting surface 1252, restricting the caster assembly 80 from switching from the second position to the first position. In this way, the position restricting effect is enhanced by the contact between surfaces.

[0049] In one embodiment, the handle 50 is rotatably mounted on the first vertical tube 113. In this way, the handle 50 can be rotated to an appropriate position when folding the three-wheeled bicycle 100, and the space occupied by the folded three-wheeled bicycle 100 can be reduced.

[0050] Furthermore, referring to Figure 2, the three-wheeled bicycle 100 further includes a quick release 110, which is connected to the first vertical tube 113 and can be switched between a first state and a second state relative to the first vertical tube 113. When the quick release 110 is in the first state, it allows the handle 50 to move relative to the first vertical tube 113, while when the quick release 110 is in the second state, it restricts the handle 50 from moving relative to the first vertical tube 113. The installation of the quick release 110 allows the handle 50 to be locked while riding, enabling safe riding. When it is necessary to switch the three-wheeled bicycle 100 between a folded state and an unfolded state, the quick release 110 is in the first state so that the handle 50 can move relative to the first vertical tube 113.

[0051] The handle 50 includes a sleeve tube 51 and a handle body 52 connected to each other, the sleeve tube 51 being fitted to the first vertical tube 113. When the quick release 110 is in the first state, the quick release 110 allows the sleeve tube 51 to move relative to the first vertical tube 113, while when the quick release 110 is in the second state, the quick release 110 restricts the movement of the sleeve tube 51 relative to the first vertical tube 113. Specifically, when the quick release 110 is in the first state, the quick release 110 allows the sleeve tube 51 to rotate and move axially relative to the first vertical tube 113, while when the sleeve tube 51 is in the second state, the quick release 110 restricts the rotation and axial movement of the sleeve tube 51 relative to the first vertical tube 113.

[0052] In one embodiment, the three-wheeled bicycle 100 further includes a motor system 120, which is mounted in a mounting space formed by a second vertical tube 123 and a second main beam 121. In this way, it is possible to integrate human-powered propulsion with motor-assisted power.

[0053] The operating principle of the three-wheeled bicycle 100 according to the embodiment of the present invention is as follows.

[0054] To switch from the unfolded state to the folded state: The caster assembly 80 is operated to switch from the first position to the second position, causing the caster assembly 80 to push up the second wheel 30, and the first wheel 20 and caster 81 to form a second support surface. The handle 73 is operated to unlock the first joint 71 and the second joint 72. With the assistance of the caster 81, the folding of the first frame body 11 and the second frame body 12 is completed. The cabin 40 is operated to drive the second fork 122 to rotate relative to the first main beam 111, so that the second main beam 121 is approximately parallel to the axis of the first wheel 20. The quick release 110 is operated to rotate the handle 50 relative to the first vertical tube 113 and move axially, so that the handle 50 is rotated to the appropriate angle and the sleeve tube 51 is retracted into the first vertical tube 113.

[0055] To switch from the folded state to the unfolded state: The quick release 110 is operated so that the handle 50 rotates relative to the first vertical tube 113 and moves axially, causing the handle 50 to return to its original position and the sleeve tube 51 to extend from the first vertical tube 113. The chassis 40 is operated to drive the second fork 122 to rotate relative to the first main beam 111 and return to its original position. The caster assembly 80 remains in the second position and pushes up the second wheel 30, and with the assistance of the caster 81, the first frame body 11 and the second frame body 12 unfold. The handle 73 is operated to lock the first joint 71 and the second joint 72.

[0056] Each of the technical features of the above embodiments can be combined in any way, and for the sake of brevity, not all possible combinations of each of the technical features in the above embodiments have been described. However, as long as these combinations of technical features are inconsistent, they should be understood to fall within the scope described herein.

[0057] The above embodiments are merely examples of some embodiments of the present application, and although their description is specific and detailed, it should not be construed as limiting the scope of the claims. A person skilled in the art will be able to make several modifications and improvements without departing from the concept of the present application, all of which fall within the scope of protection. Therefore, the scope of patent protection of the present application should be based on the claims. [Explanation of symbols]

[0058] 100 Tricycle, 10 Body frame, 11 First frame body, 111 First main beam, 112 First fork, 113 First vertical tube, 114 Inclined support tube, 12 Second frame body, 121 Second main beam, 122 Second fork, 123 Second vertical tube, 124 Connecting tube, 125 Connecting part, 1251 First position regulating surface, 1252 Second position regulating surface, 20 First wheel, 30 Second wheel, 40 Passenger compartment, 50 Handle, 51 Sleeve tube, 52 Handle body, 60 Saddle, 70 Folding mechanism, 71 First joint, 72 Second joint, 73 Handle, 80 Caster assembly, 81 Caster, 82 Connecting shaft, 821 Position regulating projection, 83 Shaft sleeve, 84 Elastic member, 90 Hinge shaft, 110 Quick release, 120 Motor system.

Claims

1. It is a three-wheeled bicycle, It includes a body frame (10), a folding mechanism (70), a first wheel (20), a second wheel (30), a caster assembly (80), and a passenger compartment (40), The vehicle body frame (10) includes a first frame body (11) and a second frame body (12) connected to each other. The folding machine (70) connects the first frame body (11) and the second frame body (12), and the first frame body (11) and the second frame body (12) are folded or unfolded by the folding machine (70). The two first wheels (20) are mounted on the first frame (11), One of the second wheels (30) is mounted on the second frame (12), The caster assembly (80) is mounted on the vehicle frame (10) and can move relative to the vehicle frame (10) to switch between a first position and a second position, and the caster assembly (80) includes a caster (81), and when the caster assembly (80) is in the first position, the two first wheels (20) and the second wheel (30) form a first support surface that supports the three-wheeled bicycle, while when the caster assembly (80) is in the second position, the two first wheels (20) and the caster (81) form a second support surface that supports the three-wheeled bicycle. The passenger compartment (40) is attached to the first frame body (11). A three-wheeled bicycle characterized in that the compartment (40) is detachably connected to the first frame body (11), and when the three-wheeled bicycle is in a folded state, the remaining part of the three-wheeled bicycle can be housed in the compartment (40).

2. The first frame body (11) includes a first main beam (111) and a first fork (112), the first fork (112) being hinged to the first main beam (111), and the first wheel (20) being connected to the first fork (112), The vehicle compartment (40) is attached to the first fork (112), The second frame body (12) includes a second main beam (121) and a second fork (122) connected to each other, and the second wheel (30) is connected to the second fork (122). The three-wheeled bicycle according to claim 1, characterized in that the folding mechanism (70) connects the first main beam (111) and the second main beam (121).

3. The first frame (11) further includes a first vertical tube (113) connected to the first main beam (111), The three-wheeled bicycle according to claim 2, wherein the three-wheeled bicycle includes a handle (50), and the handle (50) is rotatably mounted on the first vertical pipe (113).

4. The three-wheeled bicycle further includes a quick release (110), which is connected to the first vertical tube (113) and is switchable between a first state and a second state relative to the first vertical tube (113). The three-wheeled bicycle according to claim 3, characterized in that when the quick release (110) is in the first state, the quick release (110) allows the handle (50) to move relative to the first vertical pipe (113), and when the quick release (110) is in the second state, the quick release (110) restricts the handle (50) from moving relative to the first vertical pipe (113).

5. The second frame body (12) further includes a second vertical tube (123), a connecting tube (124), and a connecting portion (125), wherein the second vertical tube (123) is connected to either the second main beam (121) or the second fork (122), the connecting tube (124) is connected to either the second main beam (121) or the second vertical tube (123), the connecting portion (125) is connected to the connecting tube (124), and the caster assembly (80) is hinged to the connecting portion (125). The three-wheeled bicycle according to claim 2, further comprising a saddle (60), wherein the saddle (60) is attached to the second vertical tube (123).

6. The three-wheeled bicycle according to claim 2, characterized in that when the three-wheeled bicycle is in a folded state, the first main beam (111) and the second main beam (121) are provided at an acute angle, and the extending direction of the first main beam (111) is inclined with the extending direction of the axis of the first wheel (20).

7. The three-wheeled bicycle according to claim 1, characterized in that when the three-wheeled bicycle is in an unfolded state, the lowest part of the passenger compartment (40) is lower than the axis position of the first wheel (20).

8. The three-wheeled bicycle further includes a hinge shaft (90), the hinge shaft (90) is connected to the first frame body (11) or the second frame body (12), and the caster assembly (80) is hinged to the first frame body (11) or the second frame body (12) via the hinge shaft (90). The caster assembly (80) further includes a connecting shaft (82), a shaft sleeve (83), and an elastic member (84), one end of the connecting shaft (82) being hinged to the hinge shaft (90), and the holder of the caster (81) being rotatably mounted on the other end of the connecting shaft (82). A position-regulating projection (821) is provided on the outer surface of the connecting shaft (82), the elastic member (84) and the shaft sleeve (83) are both fitted onto the outside of the connecting shaft (82), the elastic member (84) is compressed and provided between the shaft sleeve (83) and the position-regulating projection (821), and when the caster assembly (80) is in the first position and the second position, the shaft sleeve (83) abuts against the second frame body (12) to regulate its position, as described in any one of claims 1 to 7.

9. The second frame body (12) is provided with a first position restricting surface (1251) and a second position restricting surface (1252). When the caster assembly (80) is in the first position, the end face of the shaft sleeve (83) away from the elastic member (84) abuts against the first position restricting surface (1251), thereby restricting the caster assembly (80) from switching from the first position to the second position. The three-wheeled bicycle according to claim 8, characterized in that when the caster assembly (80) is in the second position, the end face of the shaft sleeve (83) away from the elastic member (84) abuts against the second position restricting surface (1252) to restrict the caster assembly (80) from switching from the second position to the first position.

10. The first frame body (11) includes a first main beam (111) and a first fork (112), the first fork (112) being hinged to the first main beam (111), and the first wheel (20) being connected to the first fork (112). The second frame body (12) includes a second main beam (121) and a second fork (122) connected to each other, and the second wheel (30) is connected to the second fork (122). The three-wheeled bicycle according to claim 1, characterized in that the folding mechanism (70) connects the first main beam (111) and the second main beam (121).

11. The folding mechanism (70) includes a first joint (71), a second joint (72), and a handle (73), wherein the first joint (71) is hinged to the second joint (72), the handle (73) is hinged to either the first joint (71) or the second joint (72), the first joint (71) is connected to the first main beam (111), and the second joint (72) is connected to the second main beam (121), characterized in that the three-wheeled bicycle according to claim 10.

12. The three-wheeled bicycle according to claim 10, characterized in that when the three-wheeled bicycle (100) is in a folded state, the extending direction of the second main beam (121) is substantially parallel to the extending direction of the axis of the first wheel (20).

13. The three-wheeled bicycle according to claim 10, wherein the first frame body (11) further includes a first vertical tube (113) and an inclined support tube (114), the first vertical tube (113) being connected to the first main beam (111), and the inclined support tube (114) being diagonally supported between the first main beam (111) and the first vertical tube (113).

14. The second frame (12) further includes a second vertical tube (123), which is connected to the second main beam (121). The three-wheeled bicycle according to claim 10, further comprising a motor system (120), wherein the motor system (120) is mounted in a mounting space formed by the second vertical tube (123) and the second main beam (121).

15. A three-wheeled bicycle, It includes a vehicle frame (10), a folding mechanism (70), a first wheel (20), a second wheel (30), and a caster assembly (80), The vehicle body frame (10) includes a first frame body (11) and a second frame body (12) connected to each other. The folding machine (70) connects the first frame body (11) and the second frame body (12), and the first frame body (11) and the second frame body (12) are folded or unfolded by the folding machine (70). The two first wheels (20) are mounted on the first frame (11), One of the second wheels (30) is mounted on the second frame (12), The caster assembly (80) is mounted on the vehicle frame (10) and can move relative to the vehicle frame (10) to switch between a first position and a second position, and the caster assembly (80) includes a caster (81), and when the caster assembly (80) is in the first position, the two first wheels (20) and the second wheel (30) form a first support surface that supports the three-wheeled bicycle, while when the caster assembly (80) is in the second position, the two first wheels (20) and the caster (81) form a second support surface that supports the three-wheeled bicycle. The first frame body (11) includes a first main beam (111) and a first fork (112), the first fork (112) being hinged to the first main beam (111), and the first wheel (20) being connected to the first fork (112). The second frame body (12) includes a second main beam (121) and a second fork (122) connected to each other, and the second wheel (30) is connected to the second fork (122). The folding machine (70) connects the first main beam (111) and the second main beam (121), A three-wheeled bicycle characterized in that the first frame body (11) further includes a first vertical tube (113) and an inclined support tube (114), the first vertical tube (113) being connected to the first main beam (111), and the inclined support tube (114) being diagonally supported between the first main beam (111) and the first vertical tube (113).

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