Track-adjustable axle of electro-tricycle

Abstract

The utility model relates to the technical field of tricycle axles, in particular to an electric tricycle axle with adjustable wheel track, which comprises an axle body base frame, an adjusting device, a shaft head, wheels and an outer chain shaft sleeve. Adjusting devices are connected to the side faces of the bridge body base frames. The adjusting device comprises a fixed end and a driving end. The adjusting device fixing end is connected with the outer chain shaft sleeve side. The driving end of the adjusting device is connected with wheels through shaft heads. The wheel base adjusting device has the dual functions of adjusting the wheel base and adjusting the wheel base between the front wheel and the rear wheel at the same time, safety and stability are further improved, the process of lifting the wheels after parking is not needed, synchronous adjustment of the wheel base and the wheel base can be achieved in the advancing process of a vehicle, and operation is extremely labor-saving and convenient. And the production cost is reduced through a simpler structural design.

Description

Technical Field

[0001] The utility model relates to the technical field of tricycle axles, in particular to an adjustable wheelbase axle for an electric tricycle. Background Art

[0002] Axles, also known as axles, are connected to the frame or load-bearing body through suspension, and wheels are installed at both ends. The function of the axle is to bear the load of the car and maintain the normal driving of the vehicle on the road. According to different driving modes, axles are also divided into four types: steering axles, driving axles, steering driving axles and supporting axles.

[0003] The original intention of the existing power-assisted electric tricycles is to be small and flexible, and more stable, safe and practical than two-wheeled vehicles. In actual use, due to the influence of road conditions, electric tricycles often travel on streets and alleys. When traveling on flat and wide roads, they all travel at high speeds. In case of emergency situations where sharp turns need to be avoided, the disadvantages of tricycles will appear, and they are very likely to roll over. The main reason is that the compact design has a small wheelbase, so a wide wheelbase is needed at this time. When driving on narrow alleys and crowded roads, especially when parking, it is even more necessary to reduce the size. The factors affecting vehicle speed, road width and safety need to be adapted through the adjustment of wheel track, so the contradiction between the width and narrowness of the wheelbase design arises.

[0004] In order to solve this contradiction, the wheel spacing adjustment in the prior art is often modified on the existing straight-line axle, based on the design of the horizontal horizontal straight line perpendicular to the forward direction of the straight translation telescopic two-wheel wheel track. The friction between the two wheels and the ground is very large. It is necessary to lift the wheels by jacking tools such as jacks or manpower in the parking state, and then adjust the wheel track through the wheel track adjustment structure, which is complicated to operate. There is also a parallelogram hydraulic system with a very complex structure. The displacement design has a significant increase in production costs. For the means of transportation used by the people, the product that increases the cost by a considerable amount will undoubtedly not have a larger application market.

[0005] In order to solve the above problems, we propose an electric tricycle with adjustable wheelbase axle. Utility Model Content

[0006] The utility model aims to provide an electric tricycle with adjustable wheelbase axle to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electric tricycle adjustable wheelbase axle, comprising a bridge body frame, an adjustment device, an axle head, a wheel and an outer chain sleeve;

[0008] The side surface of the bridge body base frame is connected to the adjusting device; the adjusting device includes a fixed end and a driving end; the fixed end of the adjusting device is connected to the side surface of the outer chain sleeve; the driving end of the adjusting device is connected to the wheel through the shaft head.

[0009] Preferably, the adjusting device includes a half-shaft, a bridge housing sleeve and an electric push rod; the side of the bridge housing sleeve is connected to the bridge body base frame; the electric push rod includes a fixed end and a pushing end; the fixed end of the electric push rod is arranged inside the bridge housing sleeve; the half-shaft is provided with an inner cavity; the pushing end of the electric push rod is connected to the inner cavity of the half-shaft; one end of the half-shaft is slidably connected to the inner wall of the bridge housing sleeve; the side wall of the half-shaft is connected to the shaft head near the other end.

[0010] Preferably, a locking nut is provided at the connection between the end of the electric push rod driving end and the half shaft.

[0011] Preferably, a shock absorber lifting lug is provided on the outer side of the bridge housing.

[0012] Preferably, the bridge housing and the half-axle are both triangular tubular.

[0013] Preferably, the bridge base frame is an equilateral triangle structure.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the electric tricycle adjustable wheelbase axle can have the dual functions of adjusting the wheelbase and the wheelbase between the front and rear wheels at the same time, further improving safety and stability, realizing the process of lifting the wheels after parking, and realizing the synchronous adjustment of the wheelbase and wheelbase during the movement of the vehicle, which is a task that is extremely labor-saving and convenient to operate. The production cost can be reduced with a simpler structural design.

[0015] 1. The design of telescopic half-axles arranged in a horizontal figure eight allows the wheels to slide and retract along a diagonal line. The friction between the wheels and the ground is smaller than that of the linear translation in the vertical forward direction. The wheels will also move laterally and longitudinally at the same time during the diagonal sliding process. Therefore, it has the dual functions of adjusting the wheelbase while adjusting the track. The extension function of adjusting the wheelbase enhances driving stability and anti-bumping performance. Since the friction resistance of diagonal sliding is small, there is no need to lift the wheels after parking. The wheel track and wheelbase can be adjusted synchronously while the vehicle is moving. The operation and adjustment are extremely labor-saving and convenient.

[0016] 2. The half-axle is designed into a triangular hollow tube. Compared with the square tube and round tube telescopic half-axles in the prior art, it has anti-torsion and anti-sway capabilities and is more stable. At the same time, it also reduces its own weight and sliding friction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a schematic diagram of the top view of the structure of the utility model in the extended state;

[0018] Figure 2 It is a schematic diagram of the structure of the utility model in a top view in a contracted state.

[0019] In the figure: 1-bridge body frame, 2-half shaft, 3-locking nut, 4-axle head, 5-wheel, 6-bridge housing, 7-shock absorber lifting ear, 8-electric push rod, 9-outer chain sleeve. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1 , Figure 2 The utility model provides a technical solution: an electric tricycle adjustable wheelbase axle, comprising a bridge body frame 1, an adjusting device, an axle head 4, a wheel 5 and an outer chain sleeve 9.

[0022] The side of the bridge body base frame 1 is connected to the adjusting device. The adjusting device includes a fixed end and a driving end. The fixed end of the adjusting device is connected to the side of the outer chain sleeve 9. The driving end of the adjusting device is connected to the wheel 5 through the shaft head 4.

[0023] Furthermore, the adjusting device includes a half-shaft 2, a bridge housing sleeve 6 and an electric push rod 8. The bridge housing sleeve 6 is connected to the bridge body base frame 1 on the side. The electric push rod 8 includes a fixed end and a pushing end. The fixed end of the electric push rod 8 is arranged inside the bridge housing sleeve 6. The half-shaft 2 is provided with an inner cavity. The pushing end of the electric push rod 8 is connected to the inner cavity of the half-shaft 2. One end of the half-shaft 2 is slidably connected to the inner wall of the bridge housing sleeve 6. The side wall of the half-shaft 2 is connected to the shaft head 4 near the other end.

[0024] Furthermore, a locking nut 3 is provided at the connection between the end of the driving end of the electric push rod 8 and the half shaft 2.

[0025] Furthermore, a shock absorber lifting lug 7 is provided on the outer side of the axle housing casing 6 .

[0026] Furthermore, the bridge housing 6 and the half shaft 2 are both triangular tube-shaped.

[0027] Furthermore, the bridge base frame 1 is an equilateral triangle structure.

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] The longitudinal direction in the present invention is the length direction of the vehicle, that is, the front-rear direction, and the transverse direction is the width direction of the vehicle, that is, the left-right direction.

[0030] The utility model is mainly composed of a bridge housing 6, a half shaft 2, a shaft head 4 and other components. It also includes a horizontally placed triangular bridge body base frame 1. Figure 1 The axle housing sleeve 6 is divided into two halves and fixedly installed on both sides of the axle body base frame 1 in an eight-shaped shape. It can also be called the sliding sleeve of the axle shaft 2. The axle shaft 2 is a hollow structure, and an electric push rod 8 is installed in the hollow part, which is together sleeved in the axle housing sleeve 6 and can slide along the guide of the axle housing sleeve. The top of the push rod of the electric push rod 8 is fixed to the axle shaft 2 with a locking nut 3, and its telescopic push rod can slide with the axle shaft 2 as a whole. The housing is fixedly installed on the axle body base frame 1. The shaft head 4 is fixedly installed on the outer side of the rear outer end of the axle shaft 2 and forms a certain angle with it to ensure that the shaft head 4 is perpendicular to the forward direction of the vehicle body after installation and fixation.

[0031] The bridge housing sleeve 6 and the half shaft 2 are triangular tubular, and the two form a tightly sliding sleeve structure.

[0032] The triangular bridge base frame 1 is an equilateral triangle structure with three equal sides, and the internal angles thereof are all 60 degrees.

[0033] The shock absorber hanging ear 7 and the outer chain shaft sleeve 9 on the triangular bridge body base frame 1 in the embodiment of the utility model are interface points connected with the frame or the body. The shock absorber hanging ear 7 is directly connected to the shock absorber on the frame or the body, and the outer chain shaft sleeve 9 is connected through the axle pin set on the frame or the body, so that the overall vehicle axle of the utility model is installed on the body.

[0034] The shaft head 4 in the embodiment of the utility model is fixedly mounted on the outer side of the rear outer end of the half shaft 2 and forms a certain angle therewith, preferably 120 degrees in theory, to ensure that the shaft head 4 is perpendicular to the forward direction of the vehicle body after being fixed, and the shaft heads 4 on both sides are respectively fixedly mounted with wheels 5 to form the rear part of the travel system of the electric tricycle. The structure of the shaft head 4 itself can be selected according to one of the four functions of the axle described above.

[0035] The utility model selects a non-driven driven support bridge, which has no driving and steering functions. The power source of the whole vehicle is the electric wheel with steering function of the front wheel. This configuration structure is simple and convenient for analyzing the utility model. For this reason, the shaft head 4 in this embodiment is provided with bearings, brake parts and wheel hub bolts, and its own structure is particularly simple and clear. However, in actual application, a shaft head dedicated to the electric wheel with driving function can also be selected to make it a driving type axle.

[0036] The preferred electric push rod 8 in the embodiment of the utility model is a finished part of a worm gear telescopic mechanism driven by a DC motor. The self-provided control switch controls the positive and negative polarity of the power supply of the DC motor to control the push rod telescopic movement of the electric push rod 8, and its power supply voltage is selected to be equal to the power supply of the electric vehicle. The electric push rod is provided with a travel switch inside to limit the travel distance of the push rod, so the width of the wheelbase can be set.

[0037] The design principle and operation are described in detail according to the above installation structure.

[0038] The utility model changes the traditional axle half shaft 2 from a straight-line structural shape to an eight-shaped shape. The eight-shaped arrangement structure can make the movement curve of the telescopic half shaft have a certain angle with the forward direction. To be precise, during the telescopic sliding process of the two half shafts 2, the half shafts 2 drive the wheels 5 to telescopically slide and move in an oblique direction with the forward direction. The friction resistance generated by the oblique motion of the wheels 5 and the ground is smaller than the lateral linear translation motion. Because the wheels 5 and the ground in the oblique motion have a part of rolling friction, the friction resistance is much smaller than the simple linear translation friction of the telescopic half shaft arranged in a straight line. The half shaft 2 arranged in the figure of eight of the utility model, the oblique telescopic motion will generate forces in two directions at the same time during its oblique sliding process. The force in one direction will cause the wheels 5 to expand and contract in width to both sides, and the other force generated at the same time will expand and contract the wheels 5 in the forward and backward directions. To be precise, while adjusting the track width, the wheelbase is also adjusted synchronously.

[0039] The axle of the utility model is combined with an electric wheel with driving and steering functions and other parts of the existing vehicle body to form a complete vehicle. Except for the axle of the utility model, the other parts of the complete vehicle are the same as the existing electric tricycle. Therefore, by applying it to the electric tricycle, the wheelbase and wheelbase of the electric tricycle can be adjusted when the tricycle is stationary or moving.

[0040] The utility model has a simple and intuitive structural design and low production cost. The practical structure and simple operation design, especially the synchronous variable wheelbase and wheelbase function, enhance the practicality while increasing the anti-rollover safety performance and anti-bumping comfort, which is more suitable for ordinary people to travel, has broad market prospects and high commercial value.

[0041] Working principle:

[0042] When in use, the wheel is fixed on the axle head, and then the shock absorber ear 7 and the outer chain shaft sleeve 9 on the bridge body base frame 1 are directly connected to the shock absorber on the frame or the body, and are connected through the axle pin set on the frame or the body, so that the overall axle of the utility model is installed on the body, and then the power lines of the two electric push rods are connected to the power supply of the electric vehicle according to the positive and negative polarities, so as to form the rear part of the travel system of the electric tricycle.

[0043] The operation is as follows: when the vehicle is traveling on a wide, barrier-free road and needs to travel at high speed, press the "extend" switch button of the electric push rod, and the push rod drives the half shaft and the shaft head to slide diagonally backward, and finally extends the wheel backward and widens to both sides. Under the automatic control of the travel switch, the motor is powered off and stops when it reaches the set position, and the self-locking characteristics of the worm gear lock the push rod, thereby completing the task of widening the track and extending the wheelbase. When the vehicle is traveling in narrow alleys and crowded roads, especially when parking, in order to reduce the volume, the "contract" switch button of the electric push rod will be pressed, and the electric push rod will complete the opposite action to the above, reducing the track and wheelbase of the wheels, and reducing the volume of the vehicle.

[0044] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0045] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An electric tricycle with adjustable wheelbase axle, characterized in that: It comprises a bridge body frame (1), an adjusting device, an axle head (4), a wheel (5) and an outer chain sleeve (9); The side of the bridge body base frame (1) is connected to the adjusting device; the adjusting device comprises a fixed end and a driving end; the fixed end of the adjusting device is connected to the side of the outer chain shaft sleeve (9); the driving end of the adjusting device is connected to the wheel (5) via a shaft head (4).

2. The electric tricycle adjustable wheelbase axle according to claim 1, characterized in that: The adjusting device comprises a half-shaft (2), a bridge housing sleeve (6) and an electric push rod (8); the bridge housing sleeve (6) is connected to the bridge body base frame (1) on the side; the electric push rod (8) comprises a fixed end and a pushing end; the fixed end of the electric push rod (8) is arranged inside the bridge housing sleeve (6); the half-shaft (2) is provided with an inner cavity; the pushing end of the electric push rod (8) is connected to the inner cavity of the half-shaft (2); one end of the half-shaft (2) is slidably connected to the inner wall of the bridge housing sleeve (6); the side wall of the half-shaft (2) is connected to the shaft head (4) near the other end.

3. The electric tricycle adjustable wheelbase axle according to claim 2, characterized in that: A locking nut (3) is provided at the connection between the end of the driving end of the electric push rod (8) and the half shaft (2).

4. The electric tricycle adjustable wheelbase axle according to claim 2, characterized in that: The outer side surface of the axle housing casing (6) is provided with a shock absorber lifting lug (7).

5. The electric tricycle adjustable wheelbase axle according to claim 2, characterized in that: The bridge housing casing (6) and the half shaft (2) are both triangular tube-shaped.

6. The electric tricycle adjustable wheelbase axle according to claim 1, characterized in that: The bridge body base frame (1) is an equilateral triangle structure.

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