Vehicle power device, driving system and electric flat car

Abstract

The invention relates to a vehicle power device, a driving system equipped with the vehicle power device and an electric flat car equipped with the driving system. The vehicle power device comprises a supporting part and a driving part, wherein the supporting part is movably arranged relative to a main vehicle body, and wheels are assembled on the supporting part; the power output end is arranged relative to the main vehicle body in a fixed point mode, and the supporting part keeps transmission connection or release transmission between the wheels and the power output end in the moving process relative to the main vehicle body. Through the movable relation between the supporting part arranged inside and the whole vehicle and the coupling transmission effect established between the corresponding parts, it can be guaranteed that power can be automatically distributed to wheels making normal contact with the ground in the vehicle running process, the good escape effect can be achieved when the vehicle runs on the complex road surface, and the service life of the vehicle is prolonged. Compared with the prior art, the method has the advantage that the transportation operation can be better carried out in various scenes.

Description

Technical Field

[0001] The invention relates to a small-sized transport device, and in particular to a vehicle power device, a driving system and an electric flatbed vehicle. Background Art

[0002] Electric flatbed trucks are usually used in factories, parks or outdoor places due to their compactness and flexibility. Electric flatbed trucks that are widely used in the current market usually face the problem of uneven power distribution when driving on complex roads. The drive system design of this type of electric flatbed truck is relatively simple, often relying on a simple combination of a central motor or independent motors for the front and rear wheels, and a more advanced power distribution mechanism has not been developed. This traditional power distribution method, when facing complex and bumpy roads, when some wheels slip or hang in the air, it is impossible to concentrate the power of these wheels to other wheels, resulting in a low ability to escape from difficulties. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] In order to solve the technical problems in the current electric flatbed vehicles in dealing with complex road conditions, the present invention provides the following technical solutions:

[0005] A vehicle power device, comprising:

[0006] A support portion that is relatively movable with the main vehicle body, and the wheels are mounted on the support portion;

[0007] The power output end is arranged at a fixed point relative to the main vehicle body, and the support part maintains a transmission connection or releases the transmission between the wheel and the power output end during the movement relative to the main vehicle body.

[0008] As a preferred technical solution for a vehicle power device, a force-bearing end is rotatably provided on the support portion, which is transmission-connected to the wheel, and the force-bearing end is coupled to a power output end.

[0009] As a preferred technical solution for a vehicle power device, the support portion is arranged to slide longitudinally relative to the main vehicle body.

[0010] As an optimal technical solution for a vehicle power device, the power output end includes an upper shaft and a lower shaft that are slidably connected. The upper shaft is arranged to rotate relative to the main vehicle body. A spring assembly is connected between the lower shaft and the upper shaft. The upper shaft obtains rotational power, and the lower shaft is coupled to the force-bearing end.

[0011] As an optimal technical solution for a vehicle power device, the lower shaft body and the force-bearing end are connected via magnetic coupling, and a clamping portion is fixedly provided on the lower shaft body and the force-bearing end. When the lower shaft body and the force-bearing end are in contact, the two clamping portions are kept in engagement.

[0012] As a preferred technical solution for a vehicle power device, a push end is fixedly provided on the support portion, which acts on the lower shaft body.

[0013] A driving system is equipped with the above-mentioned vehicle power device and includes a power element, and the power element is synchronously connected to a plurality of power output ends.

[0014] An electric flatbed vehicle is equipped with the above-mentioned driving system and comprises a vehicle body and a connecting seat. The connecting seat is movably arranged on the vehicle body and is transmission-connected to the pushing end.

[0015] As a preferred technical solution for an electric flatbed truck, the pushing end works pneumatically, a second cylinder is provided on the vehicle body and is connected to the pushing end through an air path, and the connecting seat applies force to the second cylinder during the movement.

[0016] As a preferred technical solution for an electric flatbed vehicle, at least a plurality of wheels are configured on the support portion to be adjustable in direction and maintain transmission cooperation with the connecting seat.

[0017] The electric flatbed vehicle provided by the present invention has the beneficial effect that, through the movable relationship between the internally arranged support part and the vehicle as a whole, and the coupling transmission effect established between the corresponding components, it can ensure that during the operation of the vehicle, power can be automatically distributed to the wheels in normal contact with the ground, so that it can have a better escape effect when driving on complex roads. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0019] Figure 1 It is a schematic diagram of the structure of the electric flatbed vehicle described in an embodiment of the present invention.

[0020] Figure 2 About Figure 1 Another perspective view of .

[0021] Figure 3 About Figure 2Enlarged schematic view of part A in

[0022] Figure 4 Regarding Figure 1 Another perspective view.

[0023] Figure 5 Is Figure 1 Schematic view of part of the structure in

[0024] Figure 6 Is Figure 5 Display view of a separately intercepted part of the structure in

[0025] Figure 7 Regarding Figure 6 Exploded schematic view of the structure shown in

[0026] Figure 8 Regarding Figure 6 Front view.

[0027] Figure 9 Schematic view of the structure of the rotating column described in the embodiment of the present invention.

[0028] Figure 10 Installation schematic view of the front wheel described in the embodiment of the present invention.

[0029] Figure 11 Is Figure 10 Schematic view of part of the structure shown in

[0030] Reference numerals:

[0031] 1, vehicle body; 2, handle; 3, frame; 4, drive shaft; 401, upper shaft body; 402, lower shaft body; 403, buffer spring; 5, wheel; 6, drive motor; 7, gear; 8, support frame; 9, rotating column; 10, synchronous magnet; 11, tooth piece; 12, wheel frame; 13, universal joint; 14, connecting seat; 15, positioning spring; 16, rocker arm; 17, connecting rod; 18, first cylinder; 19, roller; 20, second cylinder. Detailed implementation manners

[0032] To make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given in conjunction with the accompanying drawings of the specification.

[0033] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0034] Secondly, the so-called "one embodiment" or "embodiment" herein refers to specific features, structures or characteristics that may be included in at least one implementation manner of the present invention. The "in one embodiment" that appears in different places in this specification does not all refer to the same embodiment, nor is it an individual or selectively mutually exclusive embodiment with other embodiments.

[0035] Thirdly, the present invention is described in detail in conjunction with schematic diagrams. When detailing the embodiments of the present invention, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally in a non-general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions of length, width and depth should be included.

[0036] Referring to Figure 1-8 , an embodiment of the present invention provides an electric flatbed truck, which is composed of a vehicle body 1 and a handle 2, and a drive system is mounted on the vehicle body 1; specifically:

[0037] The drive system is a single-motor drive system, which includes a frame 3. The vehicle body 1 is fixedly installed on the frame 3. A plurality of drive shafts 4 are rotatably provided on the frame 3. The frame 3 is also equipped with wheels 5. The number of drive shafts 4 is the same as and corresponds to the number of wheels 5. A vehicle power device is used for transmission between each drive shaft 4 and the corresponding wheel 5. The vehicle power device can realize the transmission connection and disconnection between the drive shaft 4 and the wheel 5. A drive motor 6 and a plurality of meshing gears 7 are also installed on the frame 3. The gears 7 and the drive shafts 4 are configured for belt pulley connection. The specific combination method is as Figure 5 shown. A permanent transmission connection is established between the drive motor 6 and one of the gears 7. Regarding the form of the belt pulley connection, various structural types such as chain plus sprocket, sprocket plus chain belt or belt plus belt pulley can be adopted;

[0038] When the electric flatbed truck in the present invention is running, under normal circumstances, the vehicle power device ensures that the drive shaft 4 and the wheel 5 are in a transmission connection state, that is, each wheel 5 has power, so that the drive system distributes all the power of the single drive motor 6 to each wheel 5. When the vehicle body 1 encounters a situation where a single wheel 5 is suspended due to being in a depression or pothole during driving, the vehicle power device disconnects the transmission connection state between the drive shaft 4 and the wheel 5. At this time, the power of the drive motor 6 is continued to be evenly distributed by the other wheels 5, so that the wheels 5 in normal contact with the ground can rotate to ensure that the vehicle can get out of trouble normally.

[0039] Furthermore, regarding the vehicle power device, as Figure 3-9As shown in the figure, it includes a support part (support frame 8) that slides vertically on the vehicle frame 3. The wheel 5 is assembled on the support frame 8. A rotating column 9 is also vertically rotatably arranged on the support frame 8. The rotating column 9 is coupled to the drive shaft 4. When the two are in full contact, a transmission effect is formed. When they are gradually separated, the transmission effect is reduced and finally the transmission is released. A permanent transmission connection is established between the rotating column 9 and the axle of the wheel 5. Specifically, a bevel gear 7 assembly can be used for transmission;

[0040] When the wheel 5 is normally loaded and stressed, this state is as shown in Figure 8 As shown in the figure. At this time, the rotating column 9 is in full contact with the drive shaft 4, thus ensuring the transmission effect and enabling the wheel 5 to obtain power to work. When the wheel 5 is suspended, the support frame 8 slides down on the vehicle frame 3, causing the rotating column 9 to separate from the drive shaft 4, thus ensuring that the wheel 5 does not need to obtain the power of the drive motor 6;

[0041] To ensure the transmission effect when the drive shaft 4 and the rotating column 9 are in full contact, regarding the coupling method between the two, specifically, synchronous magnets 10 are fixedly arranged on the end faces of the two. Figure 9 The figure shows the structural schematic diagram of the end face of the rotating column 9. The end face of the drive shaft 4 is also as shown in Figure 9 As shown in the figure. In addition, tooth pieces 11 distributed in an annular array are also constructed on the end faces of the two. When the two end faces are completely in contact, the two tooth pieces 11 are completely engaged together. At this time, the rotating column 9 and the drive shaft 4 are equivalent to forming a hard transmission effect to ensure the normal driving requirements of the entire flatbed truck on a normal flat road surface.

[0042] Furthermore, regarding the structure of the drive shaft 4, referring to Figure 6-8 As shown in the figure, it includes an upper shaft body 401 and a lower shaft body 402. The two are slidably sleeved and connected, specifically, spline connection can be used. A buffer spring 403 is also connected between the upper shaft body 401 and the lower shaft body 402. When the wheel 5 is normally loaded and stressed, the gravity of the entire vehicle body 1 will be applied to the buffer spring 403. That is, under normal circumstances, the buffer spring 403 is in a compressed state. The buffer spring 403 ensures the buffering effect during the driving of the vehicle body 1. When the bottom of the wheel 5 is gradually suspended, the support frame 8 gradually slides down on the vehicle frame 3, causing the pressure at the bottom of the buffer spring 403 to be gradually released, so that it gradually elongates. When the support frame 8 slides to the bottom on the vehicle frame 3, the buffer spring 403 has returned to its normal length and can no longer extend at this time, that is, the lower shaft body 402 can no longer move down further, thus completely separating from the rotating column 9 to release the transmission connection.

[0043] Further, with regard to the installation position of the braking member, it can be directly installed on the support frame 8. Specifically, according to the specific structure of the present invention, the braking member preferably adopts a disc brake or a shoe brake. When a disc brake is selected, it is configured to act on the end face of the bevel gear 7 on the wheel axle. When a shoe brake is selected, it is configured to act on the circumferential side surface of the rotating column 9. When the braking member is installed on the present invention, it can be directly set on the support frame 8 without structural adjustment. Therefore, the specific display of the braking member is omitted in the figure.

[0044] Further, regarding the turning mode of the electric flatbed truck in the present invention, with Figure 1 the perspective as a reference, the two wheels 5 near the handle 2 are defined as the front wheels 5, and the two wheels 5 far from the handle 2 are defined as the rear wheels 5. Specifically, referring to Figure 10 and Figure 11 , there are slight differences in the installation of the front wheels 5 from the foregoing parts. As shown in the figure, a wheel frame 12 is rotatably provided on the support frame 8, and the bevel gear 7 is still installed on the support frame 8. However, a universal joint 13 is arranged on a section of the wheel axle of this wheel 5. That is, one end of the wheel axle of the universal joint 13 is fixedly connected to the wheel 5 and is rotatably matched with the wheel frame 12, and the other end of the wheel axle of the universal joint 13 is fixedly connected to the bevel gear 7. When the swing of the wheel frame 12 is controlled, the steering of the front wheel 5 can be realized; a connecting seat 14 is also horizontally slidably provided on the vehicle body 1, the handle 2 is arranged on the connecting seat 14, and a positioning spring 15 is connected between the connecting seat 14 and the vehicle body 1 to ensure that the handle 2 is normally located in the middle of the vehicle body 1 in the width direction. A rocker arm 16 is constructed on the connecting seat 14, which extends downward to the bottom of the vehicle body 1 and is hinged to the wheel frame 12 by a connecting rod 17. When the handle 2 is pulled towards one side of the vehicle body 1, the swing of the wheel frame 12 is controlled by the movement of the connecting seat 14, thereby realizing a turn;

[0045] In addition, the vehicle power device further includes a pushing end (the first cylinder 18). A first cylinder 18 is installed on each support frame 8, and a roller 19 for contacting the end face of the lower shaft body 402 is rotatably installed on its output end. Second cylinders 20 are installed on both sides of the vehicle body 1, and a pushing spring is arranged inside them, so that their output ends are in the extended state under normal conditions. Each second cylinder 20 is communicated with the first cylinders 18 on the two support frames 8 on the same side of the vehicle body 1 through an air path (the arrangement of the gas ducts is omitted in the figure). During the movement of the electric flatbed truck, the direction is controlled by a person pulling the handle 2. For example, when a turn is needed towards one side, the handle 2 is pulled to slide towards that side on the vehicle body 1. At this time, the connecting seat 14 will squeeze the corresponding second cylinder 20 on that side, so that the corresponding first cylinder 18 on that side is inflated, causing the roller 19 to push upwards, so that a separation effect is formed between the lower shaft body 402 and the rotating column 9, reducing the transmission effect, thereby reducing the rotational speed of the wheels 5 on that side of the vehicle body 1, and forming a rotational speed difference between the left and right wheels 5 of the vehicle body 1 to cooperate with the turn.

[0046] Further, in the present invention, for the installation position of the power battery (omitted in the figure), it can be arranged on the vehicle frame 3, and arranged side by side with the drive motor 6, as Figure 5 shown. There is a reserved space beside the drive motor 6 for installing the power battery. It and the drive motor 6 are located at the center of the entire vehicle frame 3, thus ensuring the stable effect of the center of gravity of the vehicle frame 3, and thus the stability during the driving of the whole vehicle can be ensured. It should be noted that this description is only used to provide a preferred installation position of the power battery, and the drawings do not represent the limitation of the product layout. During the actual production process, the power battery needs to meet various requirements, such as being detachable, easy to install, and anti-collision protection, etc. The same is true for other components not specifically defined in the present invention; for the installation position of the push switch, it can be integrated on the handle 2, so as to facilitate operation. A display module can also be integrated on the handle 2 to display the remaining battery power in real time.

[0047] The above is the basic description of the technical solution of the present invention. According to the usage requirements of the actual product, the present invention can be combined with various existing products in the current technology, such as being equipped with a remote control driving function, etc., so as to automatically control the movement of the vehicle. At the same time, a driving device acting on the connecting seat 14, such as an electric telescopic rod, etc., can be installed on the vehicle body 1 to control the automatic sliding of the connecting seat 14, so as to cooperate with the turning during the automatic driving process, etc.; for another example, a radar sensor can also be installed, so as to equip the present invention with functions such as automatic braking.

[0048] It should be understood that in the development process of any actual implementation, such as in any engineering or design project, a large number of specific implementation decisions can be made. Such development efforts may be complex and time-consuming, but for those ordinary technical personnel who benefit from this disclosure, without excessive experimentation, the development efforts will be a routine work of design, manufacturing and production.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solution of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solution of the present invention, and it should be covered by the scope of the claims of the present invention.

Claims

1. A vehicle power device, characterized in that: include: A support portion that is relatively movable with the main vehicle body, and the wheels are mounted on the support portion; The power output end is arranged at a fixed point relative to the main vehicle body, and the support part maintains a transmission connection or releases the transmission between the wheel and the power output end during the movement relative to the main vehicle body.

2. The vehicle power device according to claim 1, characterized in that: The support part is rotatably provided with a force-bearing end which is transmission-connected to the wheel, and the force-bearing end is coupled to the power output end.

3. The vehicle power device according to claim 2, characterized in that: The support portion is arranged to slide longitudinally relative to the main vehicle body.

4. The vehicle power device according to claim 2, wherein: The power output end includes an upper shaft body and a lower shaft body which are slidably connected. The upper shaft body is arranged to rotate relative to the main vehicle body. A spring assembly is connected between the lower shaft body and the upper shaft body. The upper shaft body obtains rotational power. The lower shaft body is coupled to the force-bearing end.

5. The vehicle power device according to claim 4, characterized in that: The lower shaft body and the force-bearing end are connected via magnetic coupling, and both the lower shaft body and the force-bearing end are fixedly provided with engaging parts, and when the lower shaft body and the force-bearing end are in contact, the two engaging parts are kept engaged.

6. The vehicle power device according to claim 5, wherein: The support portion is fixedly provided with a push end which acts on the lower shaft body.

7. A drive system, characterized in that: The drive system is equipped with the vehicle power device according to any one of claims 1 to 6, and includes a power element, which is synchronously connected to a plurality of power output ends.

8. An electric flatbed vehicle, characterized in that: The electric flatbed vehicle is equipped with the driving system described in claim 7, and includes a vehicle body and a connecting seat. The connecting seat is movably arranged on the vehicle body and is transmission-connected to the pushing end.

9. The electric flatbed truck according to claim 8, wherein: The pushing end works pneumatically, a second cylinder is arranged on the vehicle body and is connected to the pushing end through an air path, and the connecting seat applies force to the second cylinder during the movement.

10. The electric flatbed truck according to claim 8, characterized in that: At least a plurality of wheels are arranged on the support portion so as to be direction-adjustable and to maintain transmission cooperation with the connecting seat.

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