A small household tricycle with high passability

Abstract

The present application discloses a small household high-passability tricycle, including a frame equipped with a front wheel, a handlebar and a pair of rear wheels, the frame including a front frame with a storage slot on the top; a rear frame movably connected to the front frame through a parallel link; a locking mechanism for fixing the parallel link, the front shock absorber is installed at the front end of the frame, one of the rear wheels is rotatably installed on one side of the rear end of the frame, and the other rear wheel is rotatably installed on the rear frame, and the rear frame can be moved to the rear end of the front frame and / or the side of the front frame where the rear wheels are not installed through the parallel link. In daily use, by adopting the above technical solution, when passing through a narrow road section, the locking mechanism releases the fixation of the parallel link, the rear frame is moved to the rear of the front frame, and then the parallel link is fixed by the locking mechanism, so that the lateral width of the vehicle body is reduced, and the vehicle can pass through a road with a width only as wide as the handlebar and the rear wheel, thereby greatly improving the passability.

Description

Technical Field

[0001] The invention relates to a small household tricycle with high passability. Background Art

[0002] A tricycle, a small vehicle with three wheels and a simple mechanical transmission, fitted with a carriage or flatbed, is used to carry people or cargo. It has become a common means of transportation and transport. The tricycle consists of two parts: a steerable front wheel, a bell, brakes, pedals, and a seat. A chain drives the rear wheel. Compared to bicycles, tricycles offer advantages such as greater cargo capacity and greater stability. However, due to their larger size, they require more space for storage and are less maneuverable, making them difficult to navigate through narrow roads. This necessitated improvements. Summary of the Invention

[0003] The present invention aims to solve one of the technical problems existing in the prior art.

[0004] The present application provides a small household tricycle with high passability, including a frame equipped with a front wheel, a handlebar, and a pair of rear wheels, the frame comprising:

[0005] A front frame having a storage slot on the top;

[0006] a rear frame movably connected to the front frame via a parallel link;

[0007] A locking mechanism for fixing the parallel link;

[0008] Among them, one rear wheel is rotatably mounted on one side of the rear end of the frame, and the other rear wheel is rotatably mounted on the rear frame. The rear frame can be moved to the rear end of the front frame and / or the side of the front frame where the rear wheel is not mounted through a parallel connecting rod.

[0009] The parallel linkage consists of:

[0010] A pair of mounting frames, fixedly mounted on the rear end of the front frame and the front end of the rear frame respectively;

[0011] The right connecting rod support arm has two ends hinged to a pair of mounting frames;

[0012] The left connecting rod support arm has two ends hinged to a pair of mounting frames respectively.

[0013] The locking mechanism includes:

[0014] A turntable, which is fixedly mounted on the bottom front end of the left connecting rod support arm;

[0015] a pair of movable grooves spaced apart and arranged at the edge of the surface of the turntable;

[0016] A fixed slot, which is provided in the front mounting frame and corresponds to the movable slot;

[0017] The engaging mechanism is movably mounted on the front frame and is used for being inserted into the matched movable slot and fixed slot.

[0018] The engagement mechanism includes:

[0019] A support, which is fixedly mounted on the rear end of the front frame and located above the front mounting frame;

[0020] A clamping plate, one end of which is hinged to the outer surface of the support, and the other end is used to clamp with the movable groove and the fixed groove;

[0021] A pedal is fixedly mounted on a side wall of the clamping plate away from the support;

[0022] One end of the tension spring is fixedly connected to the support, and the other end is fixedly connected to the bottom end of the clamping plate.

[0023] The snap-on plate includes:

[0024] The main body has one end hinged to the support and is triangular in shape;

[0025] A snap-fit portion, which is arranged at the bottom tip of the body;

[0026] The welding edge is obliquely arranged on the side of the main body away from the support and is used for welding and installing the pedal.

[0027] Also includes:

[0028] A counterweight box is movably mounted on the bottom of the front frame via a pair of slide rails;

[0029] A pushing mechanism is connected to the right connecting rod support arm and drives the counterweight box to slide along the slide rail;

[0030] Among them, a pair of slide rails extend laterally along the front frame. When the rear frame is located at the rear end of the front frame, the pushing mechanism pushes the counterweight box to move to the bottom of the frame close to the rear wheel side; when the rear frame is located on one side of the front frame, the pushing mechanism pushes the counterweight box to move to the center of the bottom of the frame.

[0031] The pushing mechanism includes:

[0032] A linkage shaft, which is fixedly connected to the front end of the right connecting rod support arm;

[0033] The driven shaft is rotatably mounted on the rear end of the front frame and is connected to the linkage shaft through a linkage member;

[0034] A sliding mechanism is slidably mounted on the bottom of one of the slide rails for moving the counterweight box;

[0035] A transmission column, which is fixedly arranged at the bottom of the sliding mechanism;

[0036] The transmission swing arm has one end hinged to the rear end of the bottom of the front frame and the other end engaged with the transmission column through a transmission slot;

[0037] The gear set is used to connect the transmission swing arm with the driven shaft.

[0038] The sliding mechanism includes:

[0039] A sliding frame, which is slidably mounted on the bottom of the slide rail;

[0040] A mounting groove is provided on the side of the sliding frame facing the other slide rail;

[0041] A mounting block, which is fixedly mounted on the bottom of the counterweight box and has a through hole;

[0042] The sliding rod has two ends fixedly connected to the inner walls of the mounting groove, and the middle portion movably passes through the through hole on the mounting block;

[0043] A pair of ballast springs are sleeved on the outside of the slide bar and have two ends respectively abutting against the two sides of the mounting block and the inner walls of the two ends of the mounting slot;

[0044] A slide groove is provided on the inner side wall of the sliding frame away from the mounting groove;

[0045] The convex edge is arranged on the outer side wall of the sliding frame and is slidably matched with the sliding groove.

[0046] Also includes:

[0047] A lifting groove is provided in the middle of the bottom surface of the slide rail;

[0048] A through groove connecting the top of the lifting groove and the top surface of the slide rail;

[0049] A recessed groove is provided on the top surface of the sliding frame and has raised portions at both ends;

[0050] A lifting plate is vertically slidably installed in the lifting slot, and a return spring is provided between the lifting plate and the top of the lifting slot;

[0051] The limiting plate is movably installed in the through slot, and the bottom end is fixedly connected to the lifting plate;

[0052] The roller is rotatably mounted on the bottom of the limit plate and extends into the concave groove to roll;

[0053] Among them, when the roller is located in the recessed groove, the top of the lifting plate is located in the through groove, and the bottom surface of the counterweight box corresponds to the through groove; when the roller is located on the raised portion, the bottom surface of the counterweight box is away from the through groove, the top of the lifting plate extends out of the through groove and the outer wall abuts against the left end face or right end face of the counterweight box.

[0054] Also includes:

[0055] a battery, which is arranged in the counterweight box;

[0056] a controller, which is disposed in the counterweight box and electrically connected to the battery;

[0057] a driving motor, which is electrically connected to the controller and is used to drive the handlebar to rotate;

[0058] The speed regulating handle is installed on the front wheel and is electrically connected to the controller for controlling the speed of the driving motor.

[0059] The beneficial effects of the present invention are as follows:

[0060] 1. The front and rear frames are connected by parallel links, allowing the rear frame, which is equipped with a rear wheel, to move behind the front frame, reducing the overall lateral width of the frame and improving the vehicle's passability. When loading cargo, the rear frame is moved to the side of the front frame. At this time, the two rear wheels are located on both sides of the front frame, optimizing the front frame's load capacity and improving the vehicle's passability.

[0061] 2. Through the arrangement of the counterweight box and the pushing mechanism, when the rear frame is located behind the front frame, the pushing mechanism pushes the counterweight box toward the rear wheel side of the front frame. When the rear frame is located to the side of the front frame, the pushing mechanism pushes the counterweight box toward the middle of the front frame, so that the center of gravity is adjusted according to the position of the rear frame, thereby improving the overall stability of the vehicle body.

[0062] 3. Through the setting of the battery, controller, drive motor and speed control handle, the handlebars are rotated by electric drive without the need for human drive. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 This is a schematic diagram of the overall state of the frame when the rear frame is located behind the front frame in the embodiment of the present application;

[0064] Figure 2 This is a schematic diagram of the left connecting rod support arm and the right connecting rod support arm 202 when the rear frame is located behind the front frame in the embodiment of the present application;

[0065] Figure 3 This is a schematic diagram of the overall state of the frame when the rear frame is located on one side of the front frame in the embodiment of the present application;

[0066] Figure 4 This is a schematic diagram of the states of the left connecting rod support arm and the right connecting rod support arm when the rear frame is located on one side of the front frame in the embodiment of the present application;

[0067] Figure 5 This is a schematic diagram of the locking mechanism structure in an embodiment of the present application;

[0068] Figure 6 This is a schematic diagram of the structure of the handlebar steering component in an embodiment of the present application;

[0069] Figure 7 This is a bottom view of the front frame in the embodiment of the present application;

[0070] Figure 8This is a schematic diagram of the coordination between the counterweight box and the pushing mechanism in the embodiment of the present application;

[0071] Figure 9 for Figure 8 Schematic diagram of the cross-section structure in the AA direction.

[0072] Reference numerals

[0073] 101-front wheel, 102-handlebar, 103-rear wheel, 104-front frame, 105-storage slot, 106-rear frame, 107-counterweight box, 108-slide rail, 109-handle shaft, 110-steering arm, 111-steering link, 112-limit block, 2-parallel link, 201-mounting frame, 202-right link arm, 203-left link arm, 3-locking mechanism, 301-turntable, 302-moving slot, 4-clamping mechanism, 401-support, 402-clamping plate, 4021-body, 4022-clamping part, 4023-welding edge, 4 03-pedal, 404-tension spring, 5-pushing mechanism, 501-linking shaft, 502-driven shaft, 503-transmission column, 504-transmission swing arm, 505-gear set, 6-sliding mechanism, 601-sliding frame, 602-mounting groove, 603-mounting block, 604-slide rod, 605-ballast spring, 606-slide groove, 607-convex edge, 701-lifting groove, 702-through groove, 703-recessed groove, 704-raised part, 705-lifting plate, 706-reset spring, 707-limiting plate, 708-roller, 801-battery, 802-drive motor. DETAILED DESCRIPTION

[0074] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0075] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0076] The server provided in the embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0077] Example 1

[0078] like Figures 1 to 6 As shown, an embodiment of the present application provides a small household high-passability tricycle, including a frame equipped with a front wheel 101, a handlebar 102 and a pair of rear wheels 103, the frame including a front frame 104, a top of which is provided with a storage slot 105; a rear frame 106, which is movably connected to the front frame 104 through a parallel link 2; a locking mechanism 3, which is used to fix the parallel link 2, one of the rear wheels 103 is rotatably mounted on one side of the rear end of the frame, and the other rear wheel 103 is rotatably mounted on the rear frame 106, and the rear frame 106 can be moved to the rear end of the front frame 104 and / or the side of the front frame 104 where the rear wheels 103 are not mounted through the parallel link 2.

[0079] Furthermore, the parallel link 2 includes a pair of mounting frames 201, which are fixedly mounted on the rear end of the front frame 104 and the front end of the rear frame 106 respectively; a right connecting rod arm 202, whose two ends are respectively hinged to the pair of mounting frames 201; a left connecting rod arm 203, whose two ends are respectively hinged to the pair of mounting frames 201, the right connecting rod arm 202 and the left connecting rod arm 203 are of the same length, and the front end of the right connecting rod arm 202 is closer to the handlebar 102 than the left connecting rod arm 203.

[0080] Furthermore, the locking mechanism 3 includes a turntable 301, which is fixedly mounted on the bottom front end of the left connecting rod arm 203; a pair of movable grooves 302, which are spaced apart and arranged at the edge of the surface of the turntable 301; a fixed groove, which is arranged in the front mounting frame 201 and corresponds to the movable groove 302; and a locking mechanism 4, which is movably mounted on the front frame 104 and is used to be inserted into the matching movable groove 302 and fixed groove.

[0081] Furthermore, the locking mechanism 4 includes a support 401, which is fixedly mounted on the rear end of the front frame 104 and located above the front mounting frame 201; a locking plate 402, one end of which is hinged to the outer surface of the support 401, and the other end is used to be locked with the movable groove 302 and the fixed groove; a pedal 403, which is fixedly mounted on the side wall of the locking plate 402 away from the support 401; and a tension spring 404, one end of which is fixedly connected to the support 401, and the other end is fixedly connected to the bottom end of the locking plate 402.

[0082] Furthermore, the snap-fit plate 402 includes a main body 4021, one end of which is hinged to the support 401 and is triangular; a snap-fit portion 4022, which is arranged at the bottom tip of the main body 4021; and a welding edge 4023, which is inclinedly arranged on the side of the main body 4021 away from the support 401 and is used for welding and installing the pedal 403.

[0083] Furthermore, it also includes a handle shaft 109, which is rotatably mounted on the rear end of the front frame 104 through a shaft sleeve; a handlebar 102, which is fixedly mounted on the top of the handle shaft 109; and a steering swing arm 110, one end of which is fixedly connected to the bottom end of the handle shaft 109, and the other end of which is movably connected to the front wheel 101 through a steering link 111.

[0084] Furthermore, a seat (not shown in the figure) and a human-powered drive mechanism are mounted on the rear frame 106. The human-powered drive mechanism may include a chain, a sprocket and pedals for driving the rear wheel mounted on the rear frame 106 to rotate (these structures are conventional means in the art and will not be described in detail in the specification).

[0085] In this embodiment, by adopting the above technical solution, when it is necessary to pass through a narrow road, the pedal 403 is stepped on, so that the engaging plate 402 rotates counterclockwise around the hinge point between the engaging plate 402 and the support 401, and the upper end of the body 4021 of the engaging plate 402 moves toward the handlebar 102. The engaging portion 4022 of the engaging plate 402 is lifted up and disengaged from the movable slot 302 and the fixed slot. At this time, the tension spring 404 is extended, and then the rear frame 106 is pulled to move the rear frame 106 toward the rear of the front frame 104. The two ends of the left connecting rod support arm 203 and the right connecting rod support arm 202 are respectively rotated in the mounting frames 201 at the front and rear ends until the rear frame 106 moves to the rear of the front frame 104. At this time, the left connecting rod support arm 203 and the right connecting rod support arm 202 are respectively rotated in the mounting frames 201 at the front and rear ends until the rear frame 106 moves to the rear of the front frame 104. The handlebar 102 is in a straight line with the rear wheel 103 set on the rear frame 106. At this time, the other movable groove 302 rotates with the turntable 301 to correspond to the fixed groove. At this time, the pedal 403 is released, and the tension spring 404 shortens under the elastic action, pulling the clamping part 4022 at the bottom of the clamping plate 402 body 4021 to move toward the movable groove 302 and the fixed groove, so that the clamping part 4022 is inserted into the movable groove 302 and the fixed groove, and the position of the turntable 301 is fixed. Accordingly, the left connecting rod support arm 203 and the right connecting rod support arm 202 cannot rotate, so that the tricycle of the present application can pass through a road with a width only the width of the lateral distance between the front wheel 101 and the rear wheel installed on one side of the front frame 104, thereby greatly improving the passability.

[0086] In the preferred embodiment, when the load on the front frame 104 needs to be increased, the pedal 403 is stepped on to rotate the engaging plate 402 counterclockwise around the hinge point between the engaging plate 402 and the support 401. The upper end of the body 4021 of the engaging plate 402 moves toward the handlebar 102. The engaging portion 4022 of the engaging plate 402 is lifted upward and disengaged from the movable slot 302 and the fixed slot. At this time, the tension spring 404 is extended and then pushes the rear frame 106 forward to move the rear frame 106 toward the front frame 104. The ends of the left connecting rod support arm 203 and the right connecting rod support arm 202 are respectively rotated in the mounting frames 201 at the front and rear ends until the rear frame 106 moves to the rear of the front frame 104. The rear wheel 103 mounted on the front frame 104 and the rear wheel 103 mounted on the rear frame 106 are symmetrical relative to the handlebar 102. At this time, the other movable slot 302 rotates with the turntable 301 to correspond to the fixed slot. At this time, the pedal 403 is released, and the tension spring 404 shortens under the elastic action, pulling the engaging portion 4022 at the bottom of the main body 4021 of the engaging plate 402 to move toward the movable slot 302 and the fixed slot, so that the engaging portion 4022 is inserted into the movable slot 302 and the fixed slot. The position of the turntable 301 is fixed, and accordingly, the left connecting rod arm 203 and the right connecting rod arm 202 cannot rotate, so that the load capacity of the front frame 104 is optimized.

[0087] In a preferred embodiment, when the handlebar 102 needs to be turned, the handlebar 102 is rotated, and the handle shaft 109 rotates in the shaft sleeve, driving the steering swing arm 110 to swing, so that the steering link 111 drives the front wheel 101 to deflect, so that the tricycle as a whole moves in a predetermined direction.

[0088] Example 2 is different from Example 1 in that:

[0089] In addition to the structural features of the aforementioned embodiments, this embodiment also includes a counterweight box 107, which is movably mounted on the bottom of the front frame 104 through a pair of slide rails 108; a pushing mechanism 5, which is transmission-connected to the right connecting rod arm 202 and drives the counterweight box 107 to slide along the slide rails 108. The pair of slide rails 108 extend laterally along the front frame 104. When the rear frame 106 is located at the rear end of the front frame 104, the pushing mechanism 5 pushes the counterweight box 107 to move to the bottom of the frame close to the rear wheel 103; when the rear frame 106 is located on one side of the front frame 104, the pushing mechanism 5 pushes the counterweight box 107 to move to the center of the bottom of the frame.

[0090] Furthermore, the pushing mechanism 5 includes a linkage shaft 501, which is fixedly connected to the front end of the right connecting rod arm 202; a driven shaft 502, which is rotatably installed at the rear end of the front frame 104 and is transmission-connected to the linkage shaft 501 through a linkage member; a sliding mechanism 6, which is slidingly installed at the bottom of one of the slide rails 108 for pushing the counterweight box 107; a transmission column 503, which is fixedly set at the bottom of the sliding mechanism 6; a transmission swing arm 504, one end of which is hinged to the rear end of the bottom of the front frame, and the other end is transmission-coordinated with the transmission column 503 through a transmission groove; a gear set 505, which is used to transmission-connect the transmission swing arm 504 with the driven shaft 502.

[0091] In this embodiment, by adopting the above technical solution, when the rear frame 106 moves toward the rear of the front frame 104, the right connecting rod support arm 202 rotates, the linkage shaft 501 rotates synchronously, and the driven shaft 502 is driven to rotate through the linkage belt transmission or chain transmission. The gear set 505 runs, causing the transmission swing arm 504 to swing around the hinge point between it and the bottom end of the front frame 104. The other end of the transmission swing arm 504 drives the transmission column 503 to a position close to the rear wheel 103 on the front frame 104 through the transmission groove. The counterweight box 107 is driven by the sliding mechanism 6 to move on a pair of slide rails 108 to the side of the front frame 104 with the rear wheel 103 until the rear frame 106 moves to the rear of the front frame 104. When the locking mechanism 3 completes the fixation of the left connecting arm and the right connecting arm, the counterweight box 107 moves to a position between the front wheel 101 and the rear wheel set on the front frame 104, so that the center of gravity of the front frame 104 is biased to the side with the rear wheel 103, and the rear frame 106 is raised to the position between the front frame 101 and the rear wheel set on the front frame 104. 04 rear, the stability of the vehicle body during movement; when the rear frame 106 moves to the side of the front frame 104, the right connecting rod arm 202 rotates, the linkage shaft 501 rotates synchronously, and the driven shaft 502 is driven to rotate through the linkage member (belt drive or chain drive), and the gear set 505 runs, so that the transmission swing arm 504 swings around the hinge point between it and the bottom end of the front frame 104, and the other end of the transmission swing arm 504 drives the transmission column 503 to move away from the rear wheel 103 on the front frame 104 through the transmission groove. The position moves, so that the counterweight box 107, driven by the sliding mechanism 6, moves on a pair of slide rails 108 toward the side of the front frame 104 where the rear wheel 103 is provided, until the rear frame 106 moves to the side of the front frame 104. When the locking mechanism 3 completes the fixation of the left connecting arm and the right connecting arm, the counterweight box 107 moves to the midpoint between the two rear wheels, so that the center of gravity of the front frame 104 moves to the center, thereby improving the stability of the vehicle body during movement when the rear frame 106 is located on one side of the front frame 104.

[0092] Example 3 is different from Example 2 in that:

[0093] In this embodiment, in addition to the structural features of the aforementioned embodiments, the sliding mechanism 6 further includes a sliding frame 601, which is slidably installed at the bottom of the slide rail 108; a mounting groove 602, which is arranged on the side of the sliding frame 601 facing the other slide rail 108; a mounting block 603, which is fixedly installed at the bottom of the counterweight box 107 and has a through hole; a sliding rod 604, both ends of which are fixedly connected to the inner walls at both ends of the mounting groove 602, and the middle part movably passes through the through hole on the mounting block 603; a pair of ballast springs 605, which are sleeved on the outside of the sliding rod 604 and whose two ends are respectively in contact with the two sides of the mounting block 603 and the inner walls at both ends of the mounting groove 602; a sliding groove 606, which is arranged on the inner side wall of the sliding frame 601 away from the mounting groove 602; a protruding edge 607, which is arranged on the outer wall of the sliding frame 601 and slides with the sliding groove 606.

[0094] Furthermore, it also includes a lifting groove 701, which is arranged in the middle of the bottom surface of the slide rail 108; a through groove 702, which connects the top of the lifting groove 701 with the top surface of the slide rail 108; a recessed groove 703, which is arranged on the top surface of the sliding frame 601, and has protrusions 704 at both ends; a lifting plate 705, which is vertically slidably installed in the lifting groove 701, and a return spring 706 is provided between it and the top of the lifting groove 701; a limiting plate 707, which is movably installed in the through groove 702, and the bottom end is connected to the lifting plate 707. 05 fixed connection; the roller 708 is rotatably installed at the bottom of the limit plate 707 and extends into the recessed groove 703 to roll. When the roller 708 is in the recessed groove 703, the top of the lifting plate 705 is located in the through groove 702, and the bottom surface of the counterweight box 107 corresponds to the through groove 702; when the roller 708 is located on the raised portion 704, the bottom surface of the counterweight box 107 is away from the through groove 702, and the top of the lifting plate 705 extends out of the through groove 702 and the outer side wall abuts against the left end face or the right end face of the counterweight box 107.

[0095] 3 and 4. In this embodiment, by adopting the above technical solution, when the rear frame 106 moves toward the rear of the front frame 104, the sliding frame 601 moves toward the side of the front frame 104 with the rear wheel 103 under the cooperation of the transmission swing arm 504, the transmission groove and the transmission block. At this time, the slide groove 606 slides on the outside of the convex edge 607, and the slide rod 604 slides in the through hole on the mounting block 603. The roller 708 at the bottom of the lifting plate 705 rolls into the recessed groove 703. The return spring 706 pushes the lifting plate 705 to move down, and the top end of the limit plate 707 retracts into the through groove 702, breaking away from the contact with the side wall of the counterweight box 107. At the same time, the mounting groove 602 moves with the sliding frame 601, and the ballast spring 605 on the side of the rear wheel 103 on the front frame 104 is compressed. The ballast spring 605 pushes the mounting block 603, so that the counterweight box 107 is in the slide rail 108 When the rear wheel 103 of the front frame 104 is moved to the side, one end of the counterweight box 107 moves to one end of the slide rail 108. Both ends of the slide rail 108 are provided with a limit block 112. The counterweight box 107 contacts the limit block 112. People continue to pull the rear frame 106. At this time, the ballast spring 605 away from the rear wheel on the front frame 104 continues to be compressed, and the sliding frame 601 continues to move to the side of the rear wheel 103 of the front frame 104 until the roller 708 rolls onto the protruding portion 704. At this time, the lifting plate 705 rises, the return spring 706 is compressed, and the top end of the limit plate 707 extends out of the through slot 702 and contacts the outer wall of one side of the counterweight box 107, so that the counterweight box 107 is fixed between the limit block 112 and the limit plate 707. At this time, the rear frame 106 moves to a predetermined position behind the front frame 104, and the locking mechanism 3 fixes the parallel link 2.During the movement of the rear frame 106 toward the front frame 104, the sliding frame 601 moves to the side of the front frame 104 with the rear wheel 103 in cooperation with the transmission swing arm 504, the transmission groove and the transmission block. At this time, the slide groove 606 slides on the outside of the convex edge 607, the slide rod 604 slides in the through hole on the mounting block 603, the roller 708 at the bottom of the lifting plate 705 rolls into the concave groove 703, the return spring 706 pushes the lifting plate 705 down, and the limit plate 707 The top end retracts into the through slot 702 and breaks away from the contact with the side wall of the counterweight box 107. At the same time, the mounting slot 602 moves with the sliding frame 601, and the ballast spring 605 close to the rear wheel 103 side of the front frame 104 is compressed. The ballast spring 605 pushes the mounting block 603, causing the counterweight box 107 to slide in the slide rail 108 toward the side away from the rear wheel 103 of the front frame 104. One end of the counterweight box 107 moves to one end of the slide rail 108 and contacts the limit block 112 at the end of the slide rail 108. , people continue to push the rear frame 106. At this time, the ballast spring 605 close to the rear wheel on the front frame 104 continues to be compressed and shortened, and the sliding frame 601 continues to move to the side with the rear wheel 103 away from the front frame 104 until the roller 708 rolls onto the protrusion 704. At this time, the lifting plate 705 rises, the return spring 706 is compressed and shortened, and the top of the limit plate 707 extends out of the through slot 702 and contacts the outer wall of the counterweight box 107, so that the counterweight box 107 is fixed on the limit block 1 12 and the limit plate 707. At this time, the rear frame 106 moves to a predetermined position on the side of the front frame 104, and the locking mechanism 3 fixes the parallel link 2. When the vehicle moves, the impact force generated by the shaking of the counterweight box 107 acts on the limit block 112 and the limit plate 707. Due to the large mass and thus the large inertia of the counterweight box 107, the above-mentioned mechanism prevents the counterweight box 107 from sliding on the slide rail 108 when the vehicle is moving, thus preventing the vehicle from losing its center of gravity during driving.

[0096] Example 4 is different from Example 3 in that:

[0097] In addition to the structural features of the aforementioned embodiments, this embodiment also includes a battery 801, which is arranged in the counterweight box 107; a controller, which is arranged in the counterweight box 107 and is electrically connected to the battery 801; a drive motor 802, which is electrically connected to the controller and is used to drive the handlebar 102 to rotate; and a speed control handle, which is installed on the front wheel 101 and is electrically connected to the controller for controlling the speed of the drive motor 802.

[0098] In this embodiment, by adopting the above technical solution, through the functions of the battery 801, the controller, the drive motor 802 and the speed control handle, the front wheel 101 is driven by electricity to generate power to drag the rear wheel 103 on the front frame 104 and the rear frame 106 to roll, thereby reducing labor costs and labor intensity.

[0099] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0100] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A small household tricycle with high passability, comprising a frame equipped with a front wheel (101), a handlebar (102) and a pair of rear wheels (103), characterized in that: The frame comprises: A front frame (104) having a storage slot (105) provided on the top; a rear frame (106) movably connected to the front frame (104) via a parallel link (2); A locking mechanism (3) for fixing the parallel connecting rod (2); One of the rear wheels (103) is rotatably mounted on one side of the rear end of the frame, and the other rear wheel (103) is rotatably mounted on the rear frame (106). The rear frame (106) can be moved to the rear end of the front frame (104) and / or the side of the front frame (104) where the rear wheel (103) is not mounted via a parallel link (2). The vehicle further comprises a handle shaft (109) which is rotatably mounted on the rear end of the front frame (104) via a shaft sleeve; a handlebar (102) which is fixedly mounted on the top of the handle shaft (109); and a steering swing arm (110) which has one end fixedly connected to the bottom end of the handle shaft (109) and the other end movably connected to the front wheel (101) via a steering link (111).

2. A small household high-traffic tricycle according to claim 1, characterized in that: The parallel link (2) comprises: A pair of mounting frames (201) are fixedly mounted on the rear end of the front frame (104) and the front end of the rear frame (106), respectively; A right connecting rod support arm (202), both ends of which are hinged to a pair of mounting frames (201); The left connecting rod support arm (203) has two ends hinged to a pair of mounting frames (201) respectively.

3. A small household high-traffic tricycle according to claim 2, characterized in that: The locking mechanism (3) comprises: A turntable (301) is fixedly mounted on the front bottom of the left connecting rod support arm (203); a pair of movable grooves (302) spaced apart and arranged on the edge of the surface of the rotating disk (301); A fixed groove, which is provided in the front mounting frame (201) and corresponds to the movable groove (302); The engaging mechanism (4) is movably mounted on the front frame (104) and is used for being inserted into the matching movable slot (302) and fixed slot.

4. A small household high-travel tricycle according to claim 3, characterized in that: The engaging mechanism (4) comprises: A support (401) fixedly mounted on the rear end of the front frame (104) and located above the front mounting frame (201); A snap-fit plate (402), one end of which is hinged to the outer surface of the support (401), and the other end of which is used to snap-fit with the movable groove (302) and the fixed groove; A pedal (403) fixedly mounted on a side wall of the clamping plate (402) away from the support (401); A tension spring (404) has one end fixedly connected to the support (401) and the other end fixedly connected to the bottom end of the locking plate (402).

5. A small household high-travel tricycle according to claim 4, characterized in that: The clamping plate (402) includes: The main body (4021) has one end hinged to the support (401) and is triangular in shape; A snap-fit portion (4022) is provided at the bottom tip of the body (4021); The welding edge (4023) is arranged obliquely on the side of the body (4021) away from the support (401) and is used for welding and installing the pedal (403).

6. A small household high-travel tricycle according to any one of claims 2 to 5, characterized in that: Also includes: A counterweight box (107) is movably mounted on the bottom of the front frame (104) via a pair of slide rails (108); A pushing mechanism (5) is connected to the right connecting rod support arm (202) and drives the counterweight box (107) to slide along the slide rail (108).

7. A small household high-travel tricycle according to claim 6, characterized in that: The pushing mechanism (5) comprises: A linkage shaft (501) fixedly connected to the front end of the right connecting rod support arm (202); A driven shaft (502) is rotatably mounted on the rear end of the front frame (104) and is transmission-connected to the linkage shaft (501) via a linkage member; A sliding mechanism (6) slidably mounted on the bottom of one of the slide rails (108) for moving the counterweight box (107); A transmission column (503) fixedly disposed at the bottom of the sliding mechanism (6); A transmission swing arm (504), one end of which is hinged to the rear end of the bottom of the front frame (104), and the other end of which is in transmission engagement with the transmission column (503) via a transmission slot; A gear set (505) is used to connect the transmission swing arm (504) to the driven shaft (502).

8. A small household high-travelability tricycle according to claim 7, characterized in that: The sliding mechanism (6) comprises: A sliding frame (601) is slidably mounted on the bottom of the slide rail (108); A mounting groove (602) is provided on the side of the sliding frame (601) facing the other slide rail (108); A mounting block (603) fixedly mounted on the bottom of the counterweight box (107) and having a through hole; A sliding rod (604), with both ends fixedly connected to the inner walls of both ends of the mounting groove (602), and a middle portion movably inserted through the through hole on the mounting block (603); A pair of load springs (605) are sleeved on the outside of the slide bar (604) and have two ends respectively abutting against both sides of the mounting block (603) and the inner walls of both ends of the mounting groove (602).

9. A small household high-travel tricycle according to claim 8, characterized in that: Also includes: A lifting groove (701) is provided in the middle of the bottom surface of the slide rail (108); A through groove (702) connecting the top of the lifting groove (701) and the top surface of the slide rail (108); A recessed groove (703) is provided on the top surface of the sliding frame (601) and has raised portions (704) at both ends; A lifting plate (705) is vertically slidably mounted in the lifting groove (701), and a return spring (706) is provided between the lifting plate (705) and the top of the lifting groove (701); A limiting plate (707) is movably mounted in the through slot (702), with its bottom end fixedly connected to the lifting plate (705); The roller (708) is rotatably mounted on the bottom of the limiting plate (707) and extends into the recessed groove (703) to roll.

10. A small household high-travel tricycle according to claim 6, characterized in that: Also includes: A storage battery (801) is arranged in the counterweight box (107); a controller, which is arranged in the counterweight box (107) and is electrically connected to the battery (801); a driving motor (802), electrically connected to the controller and configured to drive the handlebar (102) to rotate; A speed regulating handle is mounted on the front wheel (101) and is electrically connected to the controller for controlling the speed of the driving motor (802).

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