CN111846041A - Saddle tube with built-in battery pack for power-assisted bicycles - Google Patents

Abstract

The invention relates to a saddle pipe with a built-in battery assembly for a power-assisted bicycle, which is characterized in that: the lower end of the saddle pipe is screwed with a saddle pipe lower plug, a buffer plug is fixedly connected in a central groove of the saddle pipe lower plug, an upper plug of the saddle pipe is fixedly connected to the upper end of the saddle pipe, a central hole is formed in the center of the upper plug of the saddle pipe, a saddle supporting seat is fixedly connected to the side wall of the saddle pipe and forms an integral structure, the top end of the upper plug of the saddle pipe is connected with a cover plate through a screw, a charging socket and a power switch are fixedly connected to the cover plate, a side hole is formed in the cylindrical side wall of the upper plug of the saddle pipe, a discharging socket is fixedly connected in the side hole. Has the advantages that: the charging port, the power switch and the discharging jack of the battery pack are all arranged at the upper part of the saddle tube, so that the phenomenon that the power connecting line is broken or connected in a virtual way due to the excessive force collision when the height of the saddle is adjusted up and down can be prevented; also avoid the bicycle to ride when wading the problem that the wiring socket intake.

Description

Saddle tube with built-in battery pack for power-assisted bicycles

technical field

The invention belongs to the field of bicycles, and in particular relates to a saddle tube with a built-in battery assembly for a power-assisted bicycle.

Background technique

At present, electric bicycles are generally large in size and heavy in weight. Recently, new national standards for electric bicycles have been implemented, however, most of the electric bicycle models on the market cannot meet the national standards. The main reason is that the shape of the existing battery is basically a cuboid, and it takes up a lot of space when it is externally mounted on the bicycle frame, which makes the shape quite different from the shape of the traditional bicycle, which cannot well conform to the ergonomic design, and the appearance is ugly and comfortable to ride. Poor degree. In order to meet the requirements of the national standard, several electric bicycles that put the battery in the saddle tube of the bicycle have also been launched on the market. Patent Document Publication No. 103050643A discloses a saddle tube battery for an electric bicycle, comprising a battery casing (1), characterized in that: the battery casing (1) is shaped into a bicycle saddle tube according to the size of the battery, and a bicycle is mounted on the upper part of the battery casing (1). a saddle, a battery cell (3) is installed inside, and the battery cell (3) adopts a rechargeable battery; a battery protection plate (4) is installed in the battery casing (1), and a battery protection plate (4) is installed at the bottom of the battery casing (1) The battery cover (5) is provided with a charging and discharging socket (2) in the middle of the battery cover (5). Patent Document Publication No. 204223077U discloses a saddle tube with a built-in battery assembly, which is characterized in that: it includes a main saddle tube, an auxiliary saddle tube and a battery assembly; one end of the main saddle tube can be sleeved with the auxiliary saddle tube, and the other end is provided with a seat A chair connection structure; at least one end of the auxiliary saddle tube is provided with an opening, a battery assembly accommodating cavity communicated with the opening is arranged in the auxiliary saddle tube, and a charging port and a discharging port are also arranged on the auxiliary saddle tube; the battery assembly is placed in the The battery pack is accommodated in the cavity.

The main problem of the above-mentioned known technologies including related products sold in the market is that there is a potential safety hazard. The structural design of "the battery is placed in the saddle of the bicycle" can make the vehicle take up less space. The design features of this structure are: 1. The battery discharge socket is basically designed under the frame, which is convenient to connect with the controller; 2. The power cord connecting the discharge plug is drawn from the bottom of the saddle tube, and then plugged into the discharge socket; 3. The discharge plug connected to the battery protection board circuit is always live. The hidden dangers brought by this kind of structure design are: 1. The battery discharge socket is too low, and water is easy to enter when the bicycle is wading in water, which will cause the short circuit of the whole vehicle; 2. The battery is placed on the saddle tube of the bicycle and placed on the bicycle In the middle tube of the frame, it is locked by quick release. When the height needs to be adjusted, the moment the quick release lock is released, the heavy battery will fall to the ground together with the saddle tube, which will easily break the power cord, and the power cord will be easily scratched by the mouth of the saddle tube when the saddle is lifted 3. When the discharge plug is plugged into the discharge socket, because the plug is always in a live state, the contact between the power plug and the socket metal sheet will instantly generate sparks and corrode the contact piece, which will lead to poor contact and fire after a long time. .

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the above-mentioned technologies, and to provide a saddle tube with a built-in battery assembly for a power-assisted bicycle. The improved structure of placing the battery in the saddle tube can protect the battery cell from external collision while preventing the power supply. If the cable is broken, it can also ensure the good waterproof performance of the battery, and avoid the battery's heat, fire and explosion caused by the virtual connection of the battery plug.

In order to achieve the above purpose, the present invention adopts the following technical solutions: a saddle tube with a built-in battery assembly for a power-assisted bicycle, comprising a saddle tube and a battery assembly placed in the saddle tube, characterized in that: the lower end of the saddle tube is screwed with a saddle tube The lower plug, the buffer plug is fixedly connected in the central groove of the lower plug of the saddle tube, the upper end of the saddle tube is fixedly connected with the upper plug of the saddle tube, the center of the upper plug of the saddle tube is provided with a central hole, and its side wall is fixedly connected with a The saddle support seat forms an integral structure. The top end of the plug on the saddle tube is connected with a cover plate through screws. The cover plate is fixed with a charging socket and a power switch. A discharge socket is fixed in the side hole, and the charging socket, the power switch and the discharge socket are connected with the protection board circuit of the battery assembly.

The upper and lower ends of the battery assembly in the inner cavity of the saddle tube are respectively provided with a battery lower side buffer pad and a battery upper side buffer pad.

A sealing ring is sleeved on the stepped round platform of the lower plug of the saddle tube.

The shape of the lower plug of the saddle tube is a bowl-shaped non-porous structure, a buffer plug is fixedly connected in the bowl-shaped non-porous structure, and the end of the buffer plug is hemispherical.

The center of the saddle support seat is provided with a through hole through which the bolts of the saddle are fixed, the outer end of the saddle support seat is fixedly connected with a power indicator light bracket, and the power indicator light bracket is fixedly connected with a power indicator light, a power indicator light and a discharge socket The positive and negative poles of the terminals are connected in parallel.

Beneficial effect: Compared with the prior art, the present invention places all the newly added power switches of the charging port and discharge socket of the battery assembly on the upper part of the saddle tube, which can prevent the power source from being damaged due to over-force collision when the saddle is adjusted up and down. The phenomenon of broken or virtual connection occurs; it also avoids the problem of water entering the wiring socket when the bicycle is wading in water; at the same time, it prevents the occurrence of the phenomenon of electric corrosion of the contact pieces caused by electric sparks caused by live plugging and unplugging. The present invention completely improves the safety of the electric bicycle. The battery is built into the sealed inner space of the saddle tube, which not only makes full use of the inner space of the saddle tube, but also makes the battery well protected, and also makes the appearance design of the whole vehicle more beautiful, more ergonomic, and more comfortable to ride. Comfortable.

Description of drawings

Fig. 1 is the sectional view of the present invention;

Fig. 2 is the oblique view of the present invention;

Fig. 3 is the three-dimensional exploded view of the present invention;

4 is a schematic diagram of the connection of the battery assembly;

FIG. 5 is a schematic diagram of the installation of the present invention and the middle tube of the frame.

In the picture: 1. Saddle tube, 1-1, The side wall opening of the upper mouth of the saddle tube, 2. The lower plug of the saddle tube, 3. The sealing ring, 4. The buffer plug, 5. The upper plug of the saddle tube, 5-1, Saddle support seat, 5-2, center hole, 5-3, side hole, 6, cover plate, 6-1, charging port opening, 6-2, power switch opening, 7, battery lower side buffer, 8. Battery upper side buffer, 9. Battery assembly, 10. Charging socket, 11. Power switch, 12. Discharging socket, 13. Power indicator light bracket, 14. Power indicator light, 15, Battery pack protection board, 15 -1, power input terminal, 15-2, charging terminal, 15-3, discharge terminal, 15-4, switch terminal, 16, battery cell group, 17, plug, 18, power cord, 19, controller, 20, Bicycle tube, 21. Bicycle beam.

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the preferred embodiments.

Example 1

1-4, this embodiment provides a saddle tube with a built-in battery assembly for a power-assisted bicycle, including a saddle tube 1 and a battery pack 9 placed in the saddle tube. The lower end of the saddle tube is screwed with a lower end of the saddle tube. Plug 2, a buffer plug 4 is fixed in the central groove of the lower plug of the saddle tube, the upper end of the saddle tube and the upper plug 5 of the saddle tube are inserted with interference fit and then welded, and the center of the upper plug of the saddle tube is provided with a central hole 5-2, its side wall is fixed with a saddle support seat 5-1 to form an integral structure, the top of the plug on the saddle tube is connected with a cover plate 6 by screws, and the cover plate is provided with a charging port opening 6-1 and the power switch opening 6-2, the charging port opening 6-1 and the power switch opening 6-2 are respectively fixed with a charging socket 10 and a power switch 11, and a side hole 5 is provided on the cylindrical side wall of the plug on the saddle tube. -3, a discharge socket 12 is fixed in the side hole, and an opening 1-1 is provided on the side wall of the upper port of the saddle tube corresponding to the side hole 5-3. The opening 1-1 is convenient for the discharge socket to be fixed with the cylindrical side wall of the plug on the saddle tube catch. The charging socket, the power switch and the discharging socket are connected with the protection board circuit of the battery assembly. The shape of the lower plug of the saddle tube is a bowl-shaped non-porous structure, a buffer plug is fixedly connected in the bowl-shaped non-porous structure, and the end of the buffer plug is hemispherical.

A preferred solution of this embodiment is that the upper and lower ends of the battery assembly in the inner cavity of the saddle tube are respectively provided with a battery lower side buffer pad 7 and a battery upper side buffer pad 8 .

The preferred solution of this embodiment is that a sealing ring 3 is sleeved on the stepped circular platform of the lower plug of the saddle tube.

The preferred solution of this embodiment is that the center of the saddle support seat is provided with a through hole penetrating the bolt for fixing the saddle, the outer end of the saddle support seat is fixedly connected with a power indicator light bracket 13, and the power indicator light bracket is fixedly connected with a power supply The indicator light 14 and the power indicator light are electrically connected to the protection board 15 of the battery assembly.

Working process and principle

There is a discharge socket installed on the outside of the saddle tube, and no wires are drawn out, which eliminates the potential safety hazards such as electric leakage and short circuit caused by scratching and breaking the skin of the wire when the saddle tube is inserted and unplugged in the middle tube of the bicycle.

See Figure 5 for details. For the lower end of the saddle tube with the highest risk of wading, there is no discharge socket or wire leading out, eliminating safety hazards such as water entering the discharge socket or the wire hitting the ground and scratching the insulating layer. The bottom plug of the saddle tube of the present invention is a bowl-shaped non-porous structure, which is screwed into the lower end of the saddle tube, and the position of the thread root and the sealing ring are more completely waterproof.

There is a buffer plug fixed in the central groove of the lower plug of the saddle tube to prevent the user from adjusting the height of the saddle to release the quick release that clamps the saddle tube accidentally. As a result, the welding between the cores is damaged.

Refer to Figure 4 for details. The battery pack used in this embodiment includes 30 18650 cells and a battery protection board. The connection method of the cells is that 10 cells are connected in series in one group, 3 groups in total, and then 3 groups are connected in parallel to form 36V battery pack, the positive and negative poles of the battery pack are connected to the power input terminal 15-1 of the battery protection board; the positive and negative poles of the charging socket are connected to the charging terminal 15-2 of the battery protection board; the two wires of the power switch are connected to the battery protection board The positive and negative poles of the discharge socket and the positive and negative poles of the power indicator are connected in parallel with the discharge terminal 15-3 of the battery protection board. In the case of live power, ensure that the discharge port is in a power-off state when plugging and unplugging. When charging, the charger plug is inserted into the charging port, and the battery pack 16 is charged through the battery protection board. The charging current is limited to less than 2A to prevent the battery life from being affected by excessive charging current. When power is required, insert the power plug of the power-assisted bicycle into the discharge socket on the upper end of the saddle tube when the power switch is turned off, and then turn on the power switch after the plug is completed, so as to prevent the power plug from contacting the socket metal sheet and generate sparks and corrode the contacts. , a long time will lead to poor contact and cause fire and other safety hazards. Both the discharge socket and the plug 17 connected to the controller 19 through the power cord 18 are commercially available. The discharge socket and plug 17 use commercially available aviation plug assemblies.

The assembly sequence is as follows:

1. Press the plug on the saddle tube into the saddle tube with interference fit and weld it, and insert the battery pack and the upper and lower buffer pads of the battery pack into the saddle tube;

2. Fix the cover plate 6 above the plug on the saddle tube with screws, and block the central hole 5-2 of the plug on the saddle tube;

3. The power indicator is fixed behind the plug on the saddle tube through the power indicator frame, and the wire enters the saddle tube through the side hole of the plug on the saddle tube;

4. Install the discharge socket on the square concave surface of the side hole of the plug on the saddle tube through the screw, and seal the side hole of the plug on the saddle tube;

5. Screw the lower plug of the saddle tube into the saddle tube and tighten it to compress the sealing ring at the root of the thread to achieve a good sealing effect, and install the buffer plug whose outer top surface is hemispherical into the lower plug of the saddle tube. Inside the bowl-shaped non-porous structure;

6. Insert the installed saddle tube 9 with built-in battery assembly into the middle tube 20 of the bicycle. The plug 17 is connected to the controller 19 placed in the bicycle beam 21 through the power cord 18 to form the power supply system of the bicycle.

The detailed description of the saddle tube with a built-in battery assembly for a power-assisted bicycle with reference to the above-mentioned embodiments is illustrative rather than restrictive, and several embodiments can be listed according to the limited scope, so the present invention is not deviated from the present invention. Changes and modifications under the general concept should fall within the protection scope of the present invention.

Claims (5)

1. The utility model provides a saddle pipe of built-in battery pack for moped, includes saddle pipe and arranges the battery pack in the saddle pipe, characterized by: the lower end of the saddle pipe is screwed with a saddle pipe lower plug, a buffer plug is fixedly connected in a central groove of the saddle pipe lower plug, an upper plug of the saddle pipe is fixedly connected at the upper end of the saddle pipe, a central hole is formed in the center of the upper plug of the saddle pipe, a saddle supporting seat is fixedly connected to the side wall of the saddle pipe and forms an integral structure, the top end of the upper plug of the saddle pipe is connected with a cover plate through a screw, a charging socket and a power switch are fixedly connected to the cover plate, a side hole is formed in the cylindrical side wall of the upper plug of the saddle pipe, a discharging socket is fixedly connected in the side hole, and the charging socket.

2. The saddle pipe of the internal battery pack for a bicycle according to claim 1, wherein: and the upper end and the lower end of the battery pack in the inner cavity of the saddle pipe are respectively provided with a battery lower side cushion pad and a battery upper side cushion pad.

3. The saddle pipe of the internal battery pack for a bicycle according to claim 1, wherein: and a sealing ring is sleeved on the saddle pipe lower plug stepped circular truncated cone.

4. The saddle pipe of the internal battery pack for a bicycle according to claim 1 or 3, wherein: the lower plug of the saddle pipe is in a bowl-shaped imperforate structure, a buffer plug is fixedly connected in the bowl-shaped imperforate structure, and the end of the buffer plug is hemispherical.

5. The saddle pipe of the internal battery pack for a bicycle according to claim 1, wherein: the saddle supporting seat is characterized in that a through hole penetrating through a fixed saddle bolt is formed in the center of the saddle supporting seat, a power indicator lamp support is fixedly connected to the outer side end of the saddle supporting seat, a power indicator lamp is fixedly connected to the power indicator lamp support, and the power indicator lamp is connected with the positive electrode and the negative electrode of the discharging socket end in parallel.

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