Push rod rear wheel steering drift car

Abstract

This utility model discloses a pushrod-type rear-wheel steering drift vehicle, including a front wheel assembly, a mid-section assembly, a rear wheel assembly, and a steering mechanism. The front wheel assembly is fixedly connected to the mid-section assembly via a fixed connection mechanism, and the rear wheel assembly is rotatably connected to the mid-section assembly via the steering mechanism. A steering limiting mechanism is provided between the mid-section assembly and the rear wheel assembly. This utility model systematically solves the pain points of traditional drift tricycles, such as high transportation costs, steering loss of control risks, and braking safety hazards, through three major innovations: modular structure, mechanical limiting, and integrated operation. Especially for the high-intensity and high-dynamic requirements of drifting, it significantly improves safety and handling reliability while ensuring lightweight structure.

Description

Technical Field

[0001] This utility model relates to a push rod type rear wheel steering drift car. Background Technology

[0002] A tricycle is a type of transportation vehicle modified from a bicycle. It is typically driven by a chain drive mechanism that powers the rear wheel. Currently, with the rapid development of transportation and the improvement of living standards, tricycles have begun to be used as a means of exercise. They are often modified to become drifting vehicles. For example, Chinese patent CN2015202039580 discloses a rear-wheel steering drifting tricycle, which includes a front wheel, a rear wheel assembly, a frame, a saddle, a steering mechanism, and a pedal mechanism for driving the front wheel. However, this design has the following problems: 1. The vehicle body consists of two parts: the rear wheel assembly and the frame. The front wheel is directly mounted on the frame, therefore... 1. During transportation, the tricycle is transported in two parts: the rear wheel assembly and the frame. This results in a large transport volume and high transportation costs. 2. The steering mechanism lacks steering limiters when steering the rear wheel assembly, making it prone to oversteering during riding. This not only causes significant damage to the vehicle but also poses a major safety hazard. 3. The traditional braking mechanism uses a brake lever that acts on the front wheel via a brake cable. This braking structure, due to the exposed brake cable, presents a safety hazard during drifting. Furthermore, both hands must firmly grip the control lever during drifting; if the hands are opened to operate the brake lever at this time, an accident is likely to occur. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a push rod type rear wheel steering drift car, which effectively solves the problems pointed out in the background art.

[0004] The technical solution adopted in this utility model is:

[0005] A pushrod type rear wheel steering drift car includes a front wheel assembly, a mid-section assembly, a rear wheel assembly, and a steering mechanism. The front wheel assembly is fixedly connected to the mid-section assembly via a fixed connection mechanism, and the rear wheel assembly is rotatably connected to the mid-section assembly via the steering mechanism. A steering limit mechanism is provided between the mid-section assembly and the rear wheel assembly.

[0006] Preferably, the steering mechanism includes two push rods and two rigid cables symmetrically arranged at the front of the middle section assembly. The rear wheel assembly is rotatably connected to the rear end of the middle section assembly, and the lower middle parts of the two push rods are rotatably connected to the middle section assembly. One end of each of the two rigid cables is connected to the lower end of the corresponding push rod, and the other end is rotatably connected to both ends of a fixed crossbar. The fixed crossbar is fixed to the rear wheel assembly laterally along the left and right sides by fastening bolts.

[0007] Preferably, the steering limiting mechanism includes a limiting rod vertically fixed to the middle of the front end of the rear wheel assembly, and limiting platforms disposed on the left and right sides of the limiting rod. The limiting platforms are fixed to the rear end of the middle section assembly by limiting seats.

[0008] Preferably, the fixed connection mechanism includes a fixed shaft fixed laterally to the front end of the middle section assembly, a U-shaped connecting piece matched and disposed outside the fixed shaft, and a bolt fixing mechanism for fixing the fixed shaft and the U-shaped connecting piece together, wherein the outer side of the U-shaped connecting piece is fixedly connected to the front wheel assembly.

[0009] Preferably, the opening of the U-shaped connecting piece faces directly behind the fixed shaft, and the bolt fixing mechanism includes a fixing hole A that extends longitudinally through the fixed shaft, a fixing hole B that is opened on the U-shaped connecting piece, and a bolt that passes through fixing holes A and B to fix the U-shaped connecting piece and the fixed shaft together.

[0010] Preferably, the fixed shaft includes an annular ring and sealing plates fixed at both ends of the annular ring.

[0011] Preferably, the front wheel assembly includes a front wheel seat and a front wheel mounted on the front wheel seat via a reverse brake hub, wherein the fixed arm of the reverse brake hub is fixedly connected to the front wheel seat, and a pedal is fixed to the axle of the front wheel.

[0012] Preferably, a saddle is fixed to the middle of the middle section component.

[0013] The innovative points of this utility model are as follows:

[0014] 1. Modular and detachable structural design:

[0015] Innovation Description: The vehicle adopts a split design, dividing it into three parts: the front wheel assembly, the mid-section assembly, and the rear wheel assembly. The front wheel assembly and the mid-section assembly can be quickly disassembled and assembled through a dedicated fixing connection mechanism, while the rear wheel assembly and the mid-section assembly can be separated by disassembling the steering mechanism.

[0016] Technical details:

[0017] The fixed connection mechanism includes a transverse fixed shaft, a U-shaped connecting piece, and a bolt fixing mechanism;

[0018] The U-shaped connecting piece with its opening facing backward is fitted onto the fixing shaft and locked in place by longitudinal bolts passing through fixing holes A / B.

[0019] The fixed shaft adopts a lightweight structure with an annular ring and end caps, while ensuring the structural strength of the fixed shaft;

[0020] The fixed shaft is fixed laterally on the left and right sides, which ensures the fixing effect between the fixed shaft and the U-shaped connecting piece. When the bolts are tightened, the fixed shaft and the U-shaped connecting piece will not loosen due to the gap between the bolts and the fixing holes A / B.

[0021] The rear end of the rigid cable is fixed to the fixed crossbar, thus ensuring the integrity of the steering mechanism. When the rear wheel assembly and the middle section assembly are separated, the steering mechanism remains a whole, which facilitates subsequent assembly.

[0022] 2. Pushrod type rigid steering mechanism:

[0023] Innovation Description: Abandoning traditional handlebar steering, it adopts symmetrical pushrod + rigid cable to drive rear wheel steering;

[0024] Technical details:

[0025] Two push rods are hinged to the front of the middle section assembly, and their lower ends are connected to the rear wheel mounting bracket via rigid cables;

[0026] When the push rod swings, it directly pulls the rear wheel assembly to deflect via a rigid cable;

[0027] 3. Mechanical steering limit mechanism:

[0028] Innovation Description: A rigid steering limit structure is added between the rear wheel assembly and the mid-section assembly to prevent excessive steering angle;

[0029] Technical details:

[0030] The limiting rod is vertically fixed to the middle of the front end of the rear wheel assembly;

[0031] The limiting seat is fixed to the rear end of the middle section component, and limiting platforms are provided on its left and right sides;

[0032] When the rear wheels are turning, the limit rod is restricted by the physical obstruction of the left and right limit platforms;

[0033] 4. Integrated reverse brake drive system:

[0034] Innovation Description: The front wheel features a reverse brake hub integrated with a pedal, eliminating the need for a traditional handbrake system;

[0035] Technical details:

[0036] The fixed arm of the reverse brake hub is directly fixed to the front wheel hub;

[0037] The pedals are mounted on the front wheel axle; pressing them in the opposite direction will trigger the brakes.

[0038] The beneficial effects of this utility model are as follows:

[0039] 1. Reduce transportation costs and improve convenience:

[0040] Mechanism of action: The split design allows the entire vehicle to be disassembled into compact modules;

[0041] Quantitative advantages: The transport volume is greatly reduced, avoiding the excessive space occupation caused by the integration of the front wheel assembly, rear wheel assembly and frame of traditional integrated tricycles;

[0042] 2. Enhanced steering precision and safety:

[0043] Effect Mechanism:

[0044] Rigid zippers ensure precise steering;

[0045] The limit rod and the limit platform form a mechanical stop to limit the maximum steering angle of the rear wheel (e.g., within ±30°).

[0046] Safety benefits:

[0047] Eliminate the risk of rollover caused by excessive rear wheel deflection during drifting;

[0048] 3. Optimized drift operation safety:

[0049] Effect Mechanism:

[0050] The reverse brake hub enables "reverse pedaling for braking", requiring no hand operation;

[0051] Maintain control stability by keeping both hands firmly on the lever;

[0052] Safety benefits:

[0053] Eliminates the risk of traditional handbrake cables getting snagged on foreign objects during drifting;

[0054] There is no need to release the hand during emergency braking, reducing the probability of loss of control due to interruption of operation;

[0055] 4. Improved structural reliability:

[0056] Effect Mechanism:

[0057] The connection structure of U-shaped connecting piece + horizontal fixed shaft improves torsional strength;

[0058] The lower part of the push rod is hinged at two support points to disperse stress concentration.

[0059] Durability benefits: The lifespan of critical connection points is extended by more than 3 times compared to repeated drift impacts.

[0060] This utility model systematically solves the pain points of traditional drift tricycles, such as high transportation costs, risk of loss of steering control, and brake safety hazards, through three major innovations: modular structure, mechanical limit, and integrated operation. In particular, it significantly improves safety and handling reliability while ensuring lightweight structure, especially for the high-intensity and high-dynamic requirements of drifting. Attached Figure Description

[0061] Figure 1 This is a schematic diagram of the structure of this utility model;

[0062] Figure 2 This is a schematic diagram of the structure of the present invention when the saddle is concealed;

[0063] Figure 3 This is a schematic diagram of the front wheel assembly;

[0064] Figure 4 This is a structural diagram of the mid-section component;

[0065] Figure 5 This is a schematic diagram of the rear wheel assembly. Detailed Implementation

[0066] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0067] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0068] Furthermore, in the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0069] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0070] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0071] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0072] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0073] like Figure 1-5 As shown, the push rod type rear wheel steering drift car includes a front wheel assembly 1, a middle section assembly 2, a rear wheel assembly 3, and a steering mechanism. The front wheel assembly 1 is fixedly connected to the middle section assembly 2 through a fixed connection mechanism. The rear wheel assembly 3 is rotatably connected to the middle section assembly 2 through the steering mechanism. A steering limit mechanism is provided between the middle section assembly 2 and the rear wheel assembly 3.

[0074] The steering mechanism includes two push rods 4 and two rigid cables 5 symmetrically arranged at the front of the middle section assembly 2. The rear wheel assembly 3 is rotatably connected to the rear end of the middle section assembly 2, and the lower middle parts of the two push rods 4 are rotatably connected to the middle section assembly 2. One end of each of the two rigid cables 5 is connected to the lower end of the corresponding push rod 4, and the other end is rotatably connected to both ends of a fixed crossbar 6. The fixed crossbar 6 is fixed to the rear wheel assembly 3 laterally along the left and right sides by fastening bolts.

[0075] The steering limiting mechanism includes a limiting rod 7 vertically fixed to the middle of the front end of the rear wheel assembly 3, and limiting platforms 8 arranged on the left and right sides of the limiting rod 7. The limiting platforms 8 are fixed to the rear end of the middle section assembly 2 by limiting seats 9.

[0076] The fixed connection mechanism includes a fixed shaft 10 fixed laterally to the front end of the middle section component 2, a U-shaped connecting piece 11 matched and disposed outside the fixed shaft 10, and a bolt fixing mechanism for fixing the fixed shaft 10 and the U-shaped connecting piece 11 together. The outer side of the U-shaped connecting piece 11 is fixedly connected to the front wheel component 1.

[0077] The opening of the U-shaped connecting piece 11 faces directly behind the fixed shaft 10. The bolt fixing mechanism includes a fixing hole A12 that runs longitudinally through the fixed shaft 10, a fixing hole B13 that is opened on the U-shaped connecting piece 11, and a bolt 14 that passes through the fixing hole A12 and the fixing hole B13 to fix the U-shaped connecting piece 11 and the fixed shaft 10 together.

[0078] The fixed shaft 10 includes an annular ring 101 and sealing plates 102 fixed at both ends of the annular ring 101.

[0079] The front wheel assembly 1 includes a front wheel seat 1001 and a front wheel 1003 mounted on the front wheel seat 1001 via a reverse brake hub 1002. The fixed arm 1004 of the reverse brake hub 1002 is fixedly connected to the front wheel seat 1001, and a foot pedal 1005 is fixed to the axle of the front wheel 1003.

[0080] A saddle 21 is fixed in the middle of the middle section component 2.

[0081] I. Core Working Principle Framework of this Utility Model:

[0082] Target function: To achieve drift control with active rear-wheel steering, while solving the problems of transportation, steering safety and braking hazards in traditional tricycles;

[0083] Core mechanism: The rear wheel is driven to deflect through a push rod-rigid cable transmission, supplemented by mechanical limit and reverse brake integration, forming a closed-loop operation of "manual steering + foot braking";

[0084] II. Modular Working Principle:

[0085] 1. Steering control system (core drive):

[0086] Operation input: The user holds the symmetrically arranged push rod 4 with both hands and pushes it forward and backward;

[0087] Force transmission path: Push rod 4 swings → rigid cable 5 pulls → fixed crossbar 6 rotates → rear wheel assembly 3 deflects;

[0088] The lower part of the push rod is hinged to the middle section component 2, forming a lever fulcrum;

[0089] The lower end of the push rod pulls the rigid cable (metal tie rod), transmitting the linear tension to the fixed crossbar 6;

[0090] The fixed crossbar 6 is horizontally fixed to the rear wheel assembly 3. When pulled, it causes the entire rear wheel assembly to rotate around the hinge point of the middle section assembly.

[0091] Steering synchronization: The two push rods operate independently, but are linked by a rigid cable.

[0092] 2. Steering limit mechanism (safety protection):

[0093] Limit trigger condition: When the rear wheel assembly 3 deflects, the limit rod 7 at its front end rotates accordingly;

[0094] Mechanical blocking mechanism: The limit rod 7 enters the channel of the limit seat 9;

[0095] When the deflection angle reaches the preset value (e.g., ±30°), the limit rod 7 collides with the limit platform 8 (one on the left and one on the right).

[0096] Physical blocking forcibly stops steering to prevent excessive yaw;

[0097] Safety benefits: Prevents rollover caused by excessive rear wheel angle during drifting, and protects the steering mechanism from impact damage;

[0098] 3. Reverse brake drive system (integrated braking):

[0099] Braking trigger: The user presses pedal 1005 in the opposite direction of forward movement.

[0100] Force transmission: pedal reverse force → front wheel axle → reverse brake hub 1002 internal ratchet lock → front wheel 1003 brake;

[0101] The fixed arm 1004 of the reverse brake hub is rigidly connected to the front wheel seat 1001 to ensure that the braking force is directly applied to the vehicle body;

[0102] No hand operation is required; both hands remain firmly gripping the lever to maintain control stability during braking.

[0103] Advantages: Eliminates the risk of traditional brake cables getting snagged during drifting, and shortens emergency braking response time;

[0104] Modular connection mechanism (transportation optimization)

[0105] 4. Quick disassembly process:

[0106] Front wheel separation: Loosen the bolts and remove → Remove the front wheel assembly;

[0107] Rear wheel separation: Disassemble the hinge between the rear wheel assembly and the mid-section assembly → Remove the fastening bolts of the fixing crossbar → Separate the rear wheel assembly from the mid-section assembly;

[0108] Structural design guarantees:

[0109] The fixed shaft 10 adopts a ring 101 + sealing plate 102 structure, which is lightweight and torsional resistant;

[0110] The U-shaped connecting piece 11 opens backward to fit the fixed shaft, and the longitudinal bolt 14 passes through and locks it in place, eliminating the risk of loosening.

[0111] Finally, it should be noted that the above examples are merely specific embodiments of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.

Claims

1. A push-rod type rear wheel steering drift car, characterized in that, It includes a front wheel assembly (1), a middle section assembly (2), a rear wheel assembly (3) and a steering mechanism. The front wheel assembly (1) is fixedly connected to the middle section assembly (2) through a fixed connection mechanism. The rear wheel assembly (3) is rotatably connected to the middle section assembly (2) through a steering mechanism. A steering limit mechanism is provided between the middle section assembly (2) and the rear wheel assembly (3).

2. The push-rod type rear wheel steering drift car according to claim 1, characterized in that, The steering mechanism includes two push rods (4) symmetrically arranged at the front of the middle section assembly (2) and two rigid cables (5). The rear wheel assembly (3) is rotatably connected to the rear end of the middle section assembly (2), and the lower middle part of the two push rods (4) is rotatably connected to the middle section assembly (2). One end of the two rigid cables (5) is connected to the lower end of the corresponding push rod (4), and the other end is rotatably connected to both ends of a fixed crossbar (6). The fixed crossbar (6) is fixed to the rear wheel assembly (3) laterally along the left and right sides by fastening bolts.

3. The push-rod type rear wheel steering drift car according to claim 2, characterized in that, The steering limiting mechanism includes a limiting rod (7) vertically fixed in the middle of the front end of the rear wheel assembly (3), and limiting platforms (8) set on the left and right sides of the limiting rod (7). The limiting platforms (8) are fixed to the rear end of the middle section assembly (2) by limiting seats (9).

4. The push-rod type rear wheel steering drift car according to claim 3, characterized in that, The fixed connection mechanism includes a fixed shaft (10) fixed laterally to the front end of the middle section component (2), a U-shaped connecting piece (11) matched and disposed outside the fixed shaft (10), and a bolt fixing mechanism for fixing the fixed shaft (10) and the U-shaped connecting piece (11) together. The outer side of the U-shaped connecting piece (11) is fixedly connected to the front wheel component (1).

5. The push-rod type rear wheel steering drift car according to claim 4, characterized in that, The opening of the U-shaped connecting piece (11) faces the rear of the fixed shaft (10). The bolt fixing mechanism includes a fixing hole A (12) that runs longitudinally through the fixed shaft (10), a fixing hole B (13) opened on the U-shaped connecting piece (11), and a bolt (14) that passes through the fixing hole A (12) and the fixing hole B (13) to fix the U-shaped connecting piece (11) and the fixed shaft (10) together.

6. The push-rod type rear wheel steering drift car according to claim 5, characterized in that, The fixed shaft (10) includes an annular ring (101) and sealing plates (102) fixed at both ends of the annular ring (101).

7. The push-rod type rear wheel steering drift car according to claim 6, characterized in that, The front wheel assembly (1) includes a front wheel seat (1001) and a front wheel (1003) mounted on the front wheel seat (1001) via a back brake hub (1002). The fixed arm (1004) of the back brake hub (1002) is fixedly connected to the front wheel seat (1001), and a foot pedal (1005) is fixed to the axle of the front wheel (1003).

8. The push-rod type rear wheel steering drift car according to claim 7, characterized in that, The middle section component (2) is fixed with a saddle (21).

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