Chain tightening device of box-type folding electric vehicle and box-type folding electric vehicle

Abstract

The utility model relates to the technical field of box-type folding electric vehicles, in particular to a chain tightening device of a box-type folding electric vehicle and the box-type folding electric vehicle, and the chain tightening device comprises a fixed connecting piece and a chain tightening device, the bearing is used for limiting the chain, the bearing is rotationally arranged on the fixing shaft of the rear fork far away from the rear wheel assembly in a sleeving mode, and blocking pieces arranged outside the fixing shaft in a sleeving mode are arranged on the two sides of the bearing. According to the box-type folding electric vehicle, the limiting chain is tightened through the chain tightening device, and it is guaranteed that the chain does not fall off or dislocate when the box-type folding electric vehicle shrinks. When the contraction state of the box-type folding electric vehicle is changed, the chain is tightened and limited by the chain tightening device through the chain tightening device when the front flywheel gets close to the rear flywheel, namely the distance between the front flywheel and the rear flywheel and the distance between the front flywheel and the rear flywheel and the distance between the upper flywheel and the lower flywheel are changed, so that the chain is always in a tightened state; and the problem that the chain falls off or is staggered is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of box - type folding electric vehicles, in particular to a chain tightening device for a box - type folding electric vehicle and a box - type folding electric vehicle. Background Art

[0002] With the diversification of urban travel modes and the popularization of environmental protection concepts, box - type folding electric vehicles, as a convenient and energy - saving means of transportation, have been widely welcomed in the market in recent years. With their compact folding design, these electric vehicles are convenient to carry and store, and are particularly suitable for scenarios such as urban short - distance commuting, travel, and public transportation connection.

[0003] For example, Chinese Patent No. CN115649335A discloses a box - type folding electric bicycle, including a box body. The front and rear sides of the box body have openings, and a lifting mechanism and a telescopic body are arranged in the box body. The telescopic body includes a chain pedal mechanism for driving the rear wheel assembly through a chain and pedals. However, when the box - type folding electric vehicle contracts, the chain will be misaligned and fall off. When the box - type folding electric vehicle is unfolded, the chain needs to be manually adjusted or repaired to return to its original position.

[0004] In view of the above background, it is particularly important to develop a new technology or device that can effectively solve the problems of chain misalignment and falling off when the box - type folding electric vehicle automatically contracts. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is that when the existing box - type folding electric vehicle contracts, the chain will be misaligned and fall off. In order to overcome the deficiencies in the prior art, a chain tightening device for a box - type folding electric vehicle and a box - type folding electric vehicle are provided. The chain tightening device is used to tighten and limit the chain, so as to ensure that the chain does not fall off or become misaligned when the box - type folding electric vehicle contracts.

[0006] The technical solution adopted by the utility model to solve its technical problems is as follows: A chain tightening device for a box - type folding electric vehicle includes:

[0007] A fixed connecting piece for fixing the chain tightening device to the rear fork of the rear wheel assembly;

[0008] A bearing for limiting the chain. The bearing is rotatably sleeved on a fixed shaft away from the rear fork of the rear wheel assembly, and retaining plates are arranged on both sides of the bearing and sleeved outside the fixed shaft;

[0009] The bearing presses on the upper side of the chain located below, and the chain is embedded between the retaining plates on both sides of the bearing.

[0010] Further, one end of the fixed shaft is provided with a convex block for limiting the retaining piece away from the fixed connecting piece, and the other end is provided with an external thread for threaded connection with the fixed connecting piece.

[0011] Further, a sheath sleeved outside the fixed shaft is provided between the retaining piece close to the fixed connecting piece and the fixed connecting piece, and a gasket sleeved outside the fixed shaft is provided between the sheath and the fixed connecting piece.

[0012] Further, the fixed connecting piece is a rod-shaped piece, one end of the fixed connecting piece is fixedly connected to the rear fork of the rear wheel assembly, and the other end is threadedly connected to the fixed shaft.

[0013] A chain tightening device for a box-type folding electric vehicle, comprising:

[0014] A fixed connecting piece for fixing the chain tightening device to the rear fork of the rear wheel assembly;

[0015] A bearing for limiting the chain. The bearing is rotatably sleeved on the fixed shaft away from the rear fork of the rear wheel assembly, and retaining pieces integrally formed with the bearing are provided on both sides of the bearing;

[0016] The bearing presses on the upper side of the chain located below, and the chain is embedded between the retaining pieces on both sides of the bearing.

[0017] A box-type folding electric vehicle, comprising a box body. Openings are provided on the front and rear sides of the box body. A lifting mechanism and a telescopic vehicle body are arranged in the box body. The lifting mechanism connects the box body and the telescopic vehicle body. The telescopic vehicle body includes a front wheel assembly and a rear wheel assembly. The front wheel assembly and the rear wheel assembly respectively extend linearly from the openings on the front and rear sides of the box body for unfolding. The lifting mechanism acts on the box body and the telescopic vehicle body respectively to lift the box body off the ground. The rear fork of the rear wheel assembly is provided with the above-mentioned chain tightening device for the box-type folding electric vehicle.

[0018] The beneficial effects of the present utility model are as follows: For the box-type folding electric vehicle of the present utility model, the chain tightening device is used to tighten and limit the chain to ensure that the chain does not fall off or be misaligned when the box-type folding electric vehicle is retracted. When the retracted state of the box-type folding electric vehicle changes, through the chain tightening device, when the front flywheel approaches the rear flywheel, that is, when the front and rear and up and down distances between the front and rear flywheels change, the chain is tightened and limited by the chain tightening device, so that the chain is always in a taut state. When the box-type folding electric vehicle is unfolded, the problem of the chain falling off or being misaligned will not occur. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments recorded in this application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0020] Figure 1 is a schematic structural diagram of the chain tightening device of the present invention;

[0021] Figure 2 is the present invention Figure 1 exploded view of the structure;

[0022] Figure 3 is a schematic structural diagram of the box-type folding electric vehicle of the present invention in the unfolded state;

[0023] Figure 4 is the present invention Figure 3 schematic structural diagram from another angle;

[0024] Figure 5 is a schematic structural diagram of the box-type folding electric vehicle of the present invention in the contracted state.

[0025] Reference numerals in the figure: 1 - fixed connecting piece, 2 - fixed shaft, 21 - retaining piece, 3 - bearing, 4 - sheath, 41 - gasket, 5 - chain, 6 - rear fork. Detailed implementation manners

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0027] Figures 1-5 A chain tightening device of a box-type folding electric vehicle as shown includes:

[0028] A fixed connecting piece 1 for fixing the chain tightening device to the rear fork 6 of the rear wheel assembly;

[0029] A bearing 3 for limiting the chain 5. The bearing 3 is rotatably sleeved on the fixed shaft 2 away from the rear fork 6 of the rear wheel assembly, and retaining pieces 21 sleeved outside the fixed shaft 2 are provided on both sides of the bearing 3;

[0030] The bearing 3 presses on the upper side of the lower chain 5, and the chain 5 is embedded between the retaining plates 21 on both sides of the bearing 3.

[0031] One end of the fixed shaft 2 is provided with a convex block for limiting the retaining plate 21 away from the fixed connecting member 1, and the other end is provided with an external thread for threaded connection with the fixed connecting member 1.

[0032] A sheath 4 sleeved on the fixed shaft 2 is provided between the retaining plate 21 close to the fixed connecting member 1 and the fixed connecting member 1, and a gasket 41 sleeved on the fixed shaft 2 is provided between the sheath 4 and the fixed connecting member 1.

[0033] The fixed connecting member 1 is a rod-shaped member. One end of the fixed connecting member 1 is fixedly connected to the rear fork 6 of the rear wheel assembly, and the other end is threadedly connected to the fixed shaft 2.

[0034] A box-type folding electric vehicle includes a box body. The front and rear sides of the box body have openings. A lifting mechanism and a telescopic vehicle body are arranged in the box body. The lifting mechanism connects the box body and the telescopic vehicle body. The telescopic vehicle body includes a front wheel assembly and a rear wheel assembly. The front wheel assembly and the rear wheel assembly respectively extend linearly from the openings on the front and rear sides of the box body for unfolding. The lifting mechanism acts on the box body and the telescopic vehicle body respectively to lift the box body off the ground. The rear fork 6 of the rear wheel assembly is provided with the chain tightening device of the above box-type folding electric vehicle.

[0035] As Figure 5 shown, when the box-type folding electric vehicle shrinks, through the chain tightening device, when the front flywheel approaches the rear flywheel, that is, when the front and rear and up and down distances between the front and rear flywheels change, the chain 5 is tightened and limited by the chain tightening device, so that the chain 5 is always in a taut state; as Figure 4 shown, when the box-type folding electric vehicle unfolds, the chain 5 will not fall off or be misaligned.

[0036] Of course, it is not excluded that the retaining plates 21 on both sides of the bearing are integral with the bearing, that is, the retaining plates 21 integral with the bearing are provided on both sides of the bearing.

[0037] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.

Claims

1. A chain tightening device for a box-type folding electric vehicle, characterized in that, Comprising: A fixed connecting piece (1) for fixing the chain tightening device on the rear fork (6) of the rear wheel assembly; A bearing (3) for limiting the chain (5), the bearing (3) is rotatably sleeved on a fixed shaft (2) away from the rear fork (6) of the rear wheel assembly, and retaining plates (21) sleeved outside the fixed shaft (2) are arranged on both sides of the bearing (3); The bearing (3) presses on the upper side of the chain (5) located below, and the chain (5) is embedded between the retaining plates (21) on both sides of the bearing (3).

2. The chain tightening device of the box-type folding electric vehicle according to claim 1, wherein: One end of the fixed shaft (2) is provided with a convex block for limiting the retaining plate (21) away from the fixed connecting piece (1), and the other end is provided with an external thread for threaded connection with the fixed connecting piece (1).

3. The chain tightening device of the box-type folding electric vehicle according to claim 1, wherein: A sheath (4) sleeved outside the fixed shaft (2) is arranged between the retaining plate (21) close to the fixed connecting piece (1) and the fixed connecting piece (1), and a gasket (41) sleeved outside the fixed shaft (2) is arranged between the sheath (4) and the fixed connecting piece (1).

4. The chain tightening device of the box-type folding electric vehicle according to claim 1, wherein: The fixed connecting piece (1) is a rod-shaped piece, one end of the fixed connecting piece (1) is fixedly connected to the rear fork (6) of the rear wheel assembly, and the other end is threadedly connected to the fixed shaft (2).

5. A chain tightening device for a box-type folding electric vehicle, characterized in that, Comprising: A fixed connecting piece (1) for fixing the chain tightening device on the rear fork (6) of the rear wheel assembly; A bearing (3) for limiting the chain (5), the bearing (3) is rotatably sleeved on a fixed shaft (2) away from the rear fork (6) of the rear wheel assembly, and retaining plates (21) integral with the bearing are provided on both sides of the bearing; The bearing (3) presses on the upper side of the chain (5) located below, and the chain (5) is embedded between the retaining plates (21) on both sides of the bearing (3).

6. A box-type folding electric vehicle, comprising a box body, with openings on the front and rear sides of the box body. A lifting mechanism and a telescopic vehicle body are arranged in the box body. The lifting mechanism is connected to the box body and the telescopic vehicle body. The telescopic vehicle body includes a front wheel assembly and a rear wheel assembly. The front wheel assembly and the rear wheel assembly respectively extend linearly from the openings on the front and rear sides of the box body for deployment. The lifting mechanism acts on the box body and the telescopic vehicle body respectively to lift the box body off the ground. It is characterized in that: The rear fork (6) of the rear wheel assembly is provided with the chain tightening device of the box-type folding electric vehicle according to any one of claims 1-5.

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