Four-wheeled cycle

Abstract

The utility model provides a four-wheel type pedal cycle, and the key points are as follows: it is connected in sequence from front to back by a tricycle, a universal joint and a rear vehicle, the front wheel of the tricycle and the rear wheel of the rear vehicle are on a line; the rear vehicle is a bicycle main body, which comprises a V-shaped frame and a rear wheel, the front section of the diagonal beam of the V-shaped frame is horizontally arranged and is called a connecting pipe; the tricycle, the universal joint and the rear vehicle connected in sequence from front to back refer to that the flange type fixing base of the universal joint is welded or bolted on the rear part of the tricycle frame or a vehicle hopper, the pipe joint of the universal joint faces the rear, the connecting pipe is inserted and fixed with the pipe joint; the handle of the rear vehicle is installed on the upper end of the rear wall of the tricycle vehicle hopper. The utility model can be used as a traffic transport tool, a fitness and entertainment device and a sightseeing equipment.

Description

Technical Field

[0001] This utility model relates to a bicycle. Background Technology

[0002] Bicycles include two-wheeled bicycles (i.e., bicycles) and three-wheeled bicycles. Three-wheeled bicycles are vehicles modified from bicycles, with three wheels mounted on their frame. They come in two types: one with a single front wheel and two rear wheels, and the other with two front wheels and a single rear wheel. This article refers to the type with a single front wheel and two rear wheels as a regular three-wheeled vehicle. The cargo bed (or box) of a regular three-wheeled vehicle is located at the rear and is used for carrying passengers and goods. Although regular three-wheeled vehicles are a commonly used type of vehicle, they also have the following drawbacks: firstly, they are primarily a means of transportation with a single function; secondly, the cargo is located behind the rider, making it difficult to supervise the passenger or goods.

[0003] A bicycle mainly consists of a frame and its saddle, pedal drive system, front and rear wheels, and handlebars. The remaining part after removing the front wheel and handlebars is referred to as the bicycle body. The bicycle body includes the frame and rear wheel. The frame is a geometric shape composed of several beams and tubes. The most common frame is the triangular frame, which is formed by a vertical beam, diagonal beams, and a horizontal beam (also called a crossbeam) forming a triangle. The saddle is mounted on top of the vertical beam. There is also a V-shaped frame, which is formed by removing the horizontal beam from the triangular frame. It consists of diagonal beams and a vertical beam.

[0004] A universal joint (also called a universal connector) consists of a pair of ordinary hinges with a 90° relative orientation. The universal joint described in this article is a two-section one, which is a flange-type fixed seat and the other is a pipe joint. Summary of the Invention

[0005] To address the shortcomings of tricycles, the purpose of this invention is to provide a four-wheeled bicycle.

[0006] The purpose of this utility model is achieved as follows: it consists of a tricycle, a universal joint, and a rear carriage connected in a front-to-back sequence, with the front wheel of the tricycle and the rear wheel of the rear carriage aligned on a straight line; the rear carriage is the main body of a bicycle, including a V-shaped frame and a rear wheel, with the front section of the V-shaped frame's inclined beam being horizontal and called a connecting pipe; the front-to-back connection of the tricycle, universal joint, and rear carriage means that the flange-type fixing seat of the universal joint is welded or bolted to the rear part of the tricycle frame or the cargo bed, with the universal joint's pipe joint facing rearward, and the connecting pipe inserted into and fixed to the pipe joint; the handle (handrail) of the rear carriage is installed at the upper end of the rear side panel of the tricycle cargo bed.

[0007] This utility model has four wheels arranged in a diamond pattern, two saddles (front and rear), and two sets of foot-driven systems, allowing for two riders. The rear vehicle has no active steering function and follows the steering of the front tricycle. When encountering turns, slopes, or ditches, the two joints of the universal joint rotate relative to each other, i.e., the pipe joint rotates, enabling the rear vehicle to turn with the front vehicle and buffer bumps during operation.

[0008] Compared with existing technologies, the positive effects of this invention are: it can be ridden by one person or two people; it can be used as a means of transportation, as well as fitness, entertainment, and sightseeing equipment. It greatly expands the scope of use of bicycles and provides a new model for bicycles. Attached Figure Description

[0009] The present invention will be further described below with reference to the accompanying drawings.

[0010] Figure 1 This is a schematic diagram of the present invention.

[0011] Figure 2 yes Figure 1 Enlarged view of part A.

[0012] Figure 3 yes Figure 2 Top view.

[0013] Figure 4 yes Figure 2 View B. Detailed Implementation

[0014] This utility model consists of a tricycle 1, a universal joint 2, and a rear vehicle 3 connected in a front-to-back sequence. The front wheel 11 of the tricycle and the rear wheel 31 of the rear vehicle are aligned in a straight line. The rear vehicle 3 is the main body of the bicycle, including a V-shaped frame 32 and a rear wheel 31. The front section of the V-shaped frame's inclined beam 321 is horizontal and is called a connecting pipe 322. The tricycle, universal joint, and rear vehicle are connected in a front-to-back sequence as follows: the flange-type fixing seat 21 of the universal joint 2 is bolted to the rear side panel 121 of the tricycle 1's cargo bed 12, with the universal joint's pipe joint 22 facing rearward. The connecting pipe 322 is inserted into the pipe joint 22 and fixed with screws. The handlebar 33 (handrail) of the rear vehicle is installed at the upper end of the rear side panel of the tricycle's cargo bed.

Claims

1. A four-wheeled bicycle, characterized in that: It is The tricycle is composed of a three-wheeled vehicle, a universal joint, and a rear carriage connected in a front-to-back sequence. When the three-wheeled vehicle is aligned, the front wheel and the rear wheel of the rear carriage are on the same line. The rear carriage is the main body of the bicycle, including a V-shaped frame and a rear wheel. The front section of the V-shaped frame's inclined beam is horizontal and is called the connecting pipe. The front-to-back connection of the three-wheeled vehicle, universal joint, and rear carriage means that the flange-type fixing seat of the universal joint is welded or bolted to the rear of the three-wheeled vehicle frame or the cargo bed, with the universal joint's pipe joint facing rearward. The connecting pipe is inserted into and fixed to the pipe joint. The handlebars of the rear carriage are installed at the upper end of the rear side panel of the three-wheeled vehicle's cargo bed.

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