CN212119042U - Toy with steering and buffering device on chassis - Google Patents

Abstract

The utility model provides a chassis has toy that turns to and buffer belongs to toy technical field, including chassis, front drive and back drive arrangement, front drive, back drive install respectively at anterior, the rear portion on chassis, be provided with damper in the front drive, can realize the chassis shock-absorbing function under the environment of jolting, back drive includes the driver plate and turns to the joint, back drive can order about the driver plate and drive the place ahead or the rear swing that turn to the joint to the chassis, and then realize turning to the function. The utility model discloses a turn and the shock-absorbing function of toy have been realized to preceding drive arrangement and back drive arrangement, have improved the experience sense and the interest of building blocks toy greatly to can simulate real turn of vehicle and shock attenuation effect, give the more real visual experience of player, promote player's enjoyment, improve the market competition of product.

Description

Toy with steering and buffering device on chassis

Technical Field

The utility model relates to a toy technical field specifically, relates to a chassis has and turns to and buffer's toy.

Background

The blocks are generally cubic solid wood or plastic toys, allowing for different arrangements or construction activities with various styles of blocks, developing children's intelligence, making up houses, various animals, etc. The building blocks are beneficial to developing intelligence and training the hand-eye coordination ability of children, toys with various structures formed by arranging, connecting and combining the building blocks are beneficial to intelligence of the children, the imagination of the children is brought into play, various types of building blocks are comprehensively utilized to build a real object together, and the imagination and creativity of the children are cultured.

With the continuous improvement of living standard and the rapid development of children's toy products, children's toy vehicles have become the mainstream products in children's toys. Toy car base then is the essential important part of toy car, and current toy car base is still lacked in the aspect of interesting, mentality promoting nature, variety, also can not realize simulating real vehicle and turning and absorbing design to bulky building blocks car, has reduced building blocks toy's experience and has felt and interesting, can not satisfy people's mental demand growing day by day.

Patent document CN205672551U discloses an interesting building block set, which comprises a building block body and a plurality of building block modules inserted into the building block body, wherein the building block modules comprise a module i, a module ii, a module iii, a module iv and a module iv, and the module iv, the module iv and the module iv are all provided with a shell, a transmission structure and an output component; the transmission structure is accommodated in the shell, and the lower end of the transmission structure is provided with a transmission input part which extends out of the bottom of the shell; the output part is connected with the upper end of the transmission structure; the building blocks body is equipped with a car model body, be equipped with four wheels on the car model body, still be equipped with second transmission structure in the car model body, the lower extreme and a pair of wheel connection of second transmission structure, the upper end of second transmission structure is equipped with a transmission output part two, two synchronous rotations of wheel are followed to transmission output part, transmission output part two corresponds with transmission input part, but this design does not turn and damping device, the interest and the experience that have reduced the player feel, structural design is unreasonable.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims at providing a toy with a steering and buffering device on a chassis.

According to the utility model, the toy with the steering and buffering device on the chassis comprises a chassis, a front driving device and a rear driving device;

the front driving device and the rear driving device are respectively arranged at the front part and the rear part of the chassis;

the front driving device is provided with a motor gearbox and a damping component;

one end of the damping component is arranged on the motor gearbox, and the other end of the damping component is connected with the chassis;

the rear driving device comprises a driving plate and a steering joint, and can drive the driving plate to drive the steering joint to swing towards the front or the back of the chassis, so that the steering of the wheels is realized;

the rear driving device also comprises a connecting rod, and the steering joint comprises a first joint and a second joint;

a first accommodating space is formed in the chassis, and the connecting rod and the drive plate are both arranged in the first accommodating space;

one ends of the first joint and the second joint are respectively arranged in the first accommodating space, and the other ends of the first joint and the second joint respectively extend to the outside of the chassis;

two ends of the connecting rod are respectively movably matched with the first joint and the second joint.

Preferably, the rear driving device further comprises a universal joint, and the drive plate is movably matched with the first joint through the universal joint;

when the drive plate rotates, the drive plate can drive the universal joint to drive the first joint to swing towards the front or the back of the chassis, and then the first joint drives the second joint to swing towards the front or the back of the chassis synchronously through the connecting rod.

Preferably, the rear driving device further comprises a power device and a transmission assembly;

the power device can drive the driving plate to rotate forwards or backwards through the transmission component.

Preferably, the dial comprises a dial wheel and a plurality of dial rods;

the poke rods are uniformly arranged along the circumferential direction of the poke wheel.

Preferably, the front driving device further comprises a connecting assembly;

a second accommodating space is formed in the chassis, and the motor gearbox and the connecting assembly are arranged in the second accommodating space;

one end of the connecting assembly is rotatably arranged on the chassis, and the other end of the connecting assembly is connected with the motor gearbox.

Preferably, the front driving device further comprises a battery pack and a PCBA board;

the PCBA board is respectively electrically connected with the battery pack and the motor gear box.

Preferably, the front driving device further comprises a third joint and a fourth joint;

one end of the third joint is connected with one side of the motor gearbox, and the other end of the third joint extends to the outside of the chassis;

one end of the fourth joint is connected with the other side of the motor gearbox, and the other end of the fourth joint extends to the outside of the chassis.

Preferably, the chassis comprises an upper chassis cover and a lower chassis cover;

the lower part of the upper chassis cover is detachably arranged on the upper part of the lower chassis cover.

Preferably, the upper part of the upper chassis cover comprises a first connection face, a second connection face and a third connection face;

the first connecting surface, the second connecting surface and the third connecting surface form a concave structure together;

the lower chassis cover is of an inverted concave structure;

a plurality of plug holes are respectively formed in the first connecting surface, the second connecting surface and the third connecting surface;

the front, the back, the left and the right of the lower chassis cover are respectively provided with a plurality of plug holes.

According to the utility model, the toy with the steering and buffering device on the chassis comprises a chassis, a front driving device and a rear driving device;

the front driving device and the rear driving device are respectively arranged at the front part and the rear part of the chassis;

a damping component is arranged in the front driving device;

the rear driving device comprises a driving plate and a steering joint, and can drive the driving plate to drive the steering joint to swing towards the front or the back of the chassis, so that the steering of the wheels is realized;

the rear driving device also comprises a connecting rod and a universal joint, and the steering joint comprises a first joint and a second joint;

a first accommodating space is formed in the chassis, and the connecting rod, the universal joint and the drive plate are all arranged in the first accommodating space;

one ends of the first joint and the second joint are respectively arranged in the first accommodating space, and the other ends of the first joint and the second joint respectively extend to the outside of the chassis;

two ends of the connecting rod are respectively movably matched with the first joint and the second joint;

the drive plate is movably matched with the first joint through a universal joint;

when the drive plate rotates, the drive plate can drive the universal joint to drive the first joint to swing towards the front or the back of the chassis, and then the first joint drives the second joint to swing towards the front or the back of the chassis synchronously through the connecting rod;

the rear driving device also comprises a power device and a transmission assembly;

the power device can drive the driving plate to rotate forwards or backwards through the transmission component;

the drive plate comprises a drive wheel and a plurality of drive rods;

the poke rods are uniformly arranged along the circumferential direction of the poke wheel;

the front driving device comprises a motor tooth box and a connecting assembly;

a second accommodating space is formed in the chassis, and the motor gearbox and the connecting assembly are arranged in the second accommodating space;

one end of the connecting component is rotatably arranged on the chassis, and the other end of the connecting component is connected with the motor gearbox;

one end of the damping component is arranged on the motor gearbox, and the other end of the damping component is connected with the chassis;

the front driving device also comprises a battery pack and a PCBA board;

the PCBA board is electrically connected with the battery pack and the motor tooth box respectively;

the front driving device also comprises a third joint and a fourth joint;

one end of the third joint is connected with one side of the motor gearbox, and the other end of the third joint extends to the outside of the chassis;

one end of the fourth joint is connected with the other side of the motor gearbox, and the other end of the fourth joint extends to the outside of the chassis;

the chassis comprises an upper chassis cover and a lower chassis cover;

the lower part of the upper chassis cover is detachably arranged on the upper part of the lower chassis cover;

the upper part of the upper chassis cover comprises a first connecting surface, a second connecting surface and a third connecting surface;

the first connecting surface, the second connecting surface and the third connecting surface form a concave structure together;

the lower chassis cover is of an inverted concave structure;

a plurality of plug holes are respectively formed in the first connecting surface, the second connecting surface and the third connecting surface;

the front, the back, the left and the right of the lower chassis cover are respectively provided with a plurality of plug holes.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a turn and the shock-absorbing function of building blocks chassis toy have been realized to preceding drive arrangement and back drive arrangement, have improved the experience of building blocks toy greatly and have felt and interesting, have solved the not enough of prior art, have satisfied people's mental demand growing increasingly.

2. The utility model discloses a driver plate, universal wheel, connecting rod and a plurality of articular cooperation have realized that toy chassis turns in a flexible way and can realize the multi-angle turn, have promoted player's experience and have felt and interesting.

3. The utility model discloses a motor tooth case, damper assembly and coupling assembling's cooperation presents the shock attenuation effect similar with the oversize vehicle through rotatable connected mode cooperation spring, gives the more real visual experience of player, has promoted player's enjoyment, has improved the market competition of product.

4. The utility model discloses go up chassis lid, lower chassis and cover and set up a plurality of spliced eyes respectively, for the toy provides the extension space, the player can increase different building blocks according to the hobby and with the imagination space of performance player, splices out the product of different effects, can develop children's intelligence, the reinforcing ability of starting to work.

5. The utility model discloses a plurality of through-holes on the chassis adopt long circle structure with the utility model discloses a turn and shock-absorbing function cooperation, structural design is ingenious, and the appearance is pleasing to the eye.

6. The utility model discloses go up the character cut in bas-relief structure of chassis lid and splice the abundant imagination space that provides for the player, the chassis lid adopts down the character cut in bas-relief structure unanimous with real vehicle appearance, has given the player lifelike visual effect, has promoted the aesthetic feeling of product to a certain extent, has promoted the market competition of product.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic top view of the interior of the chassis;

FIG. 3 is a schematic structural view of the shifting teeth;

FIG. 4 is a schematic view of the rear drive mounted in the chassis;

FIG. 5 is a schematic structural diagram of the front drive apparatus;

fig. 6 is a schematic structural view of the front driving device and the rear driving device.

The figures show that:

damping component 21 of first accommodating space 11 of chassis 1

Third through hole 22 of connecting rod 2 motor gearbox 12

Fourth through hole 23 of second accommodation space 13 of first joint 3

Chassis cover 24 on battery pack 14 of second joint 4

Chassis cover 25 under universal joint 5 PCBA board 15

First connection surface 26 of third joint 16 of dial 6

Second connection surface 27 of fourth joint 17 of power unit 7

Drive assembly 8 connects third connecting surface 28 of assembly 18

First through hole 19 of thumb wheel 9

Second through hole 20 of poke rod 10

Detailed Description

The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.

The utility model provides a chassis has toy that turns to and buffer, as shown in figure 1, including chassis 1, front drive and back drive, front drive, back drive install respectively at chassis 1 anterior, rear portion, be provided with damper 21 among the front drive, can realize the chassis shock-absorbing function under the environment of jolting, back drive includes driver plate 6 and turns to the joint, back drive can order about driver plate 6 and drive and turn to the joint and swing to chassis 1 the place ahead or rear, and then realize turning to of wheel. In a preferred embodiment, as shown in fig. 3, the dial 6 includes a dial 9 and a plurality of dial bars 10, and the plurality of dial bars 10 are uniformly arranged along the circumferential direction of the dial 9.

Further, in a preferred embodiment, as shown in fig. 2 and 6, the rear driving device further includes a link 2 and a universal joint 5, the steering joint includes a first joint 3 and a second joint 4, as shown in fig. 4, a first accommodating space 11 is provided inside the chassis 1, the link 2, the universal joint 5 and the dial 6 are all installed in the first accommodating space 11, wherein a first through hole 19 and a second through hole 20 are respectively provided on both sides of the chassis 1, the first through hole 19 and the second through hole 20 are respectively of an oblong structure, a length direction of the oblong structure is consistent with a length direction of the chassis 1 and is matched with the first joint 3 and the second joint 4 in a front-back swinging manner, one end of the first joint 3 and one end of the second joint 4 are respectively installed in the first accommodating space 11, and the other end of the first joint 3 and the other end of the second joint 4 are respectively matched with the first through hole 19 and the second through hole 20, The second through holes 20 extend to the outside of the chassis 1 and are connected to wheels, respectively.

Furthermore, as shown in fig. 2 and 6, two ends of the connecting rod 2 are respectively movably matched with the first joint 3 and the second joint 4, the driving plate 6 is movably matched with the first joint 3 through the universal joint 5, when the driving plate 6 rotates, the driving plate 6 can drive the universal joint 5 to drive the first joint 3 to swing to the front or the rear of the chassis 1, and then the first joint 3 drives the second joint 4 to swing to the front or the rear of the chassis 1 through the connecting rod 2, so as to realize the steering function of the wheel, wherein the universal joint 5 and the first joint 3 can be fixedly connected, or can be movably matched with one end of the universal joint 5 connected with the first joint 3, and have a certain degree of freedom, and the transmission effect of the driving plate 6 and the universal joint 5 can also be realized.

Specifically, as shown in fig. 4, the rear driving device further includes a power device 7 and a transmission assembly 8, and the power device 7 can drive the dial 6 to rotate forward or backward through the transmission assembly 8, so as to drive the first joint 3 and the second joint 4 to swing back and forth at the same time, thereby achieving the steering function of the wheel. In a preferred embodiment, the transmission assembly 8 adopts a gear set for transmission; in a variation, the transmission assembly 8 is driven by a transmission chain, and is selected according to practical conditions in specific applications.

Specifically, as shown in fig. 5, the front driving device includes a motor gearbox 12 and a connecting assembly 18, the inside of the chassis 1 is provided with a second accommodating space 13, the motor gearbox 12, a damping assembly 21 and the connecting assembly 18 are all installed in the second accommodating space 13, one end of the connecting assembly 18 is rotatably installed on the chassis 1, the other end of the connecting assembly 18 is connected with the motor gearbox 12, one end of the damping assembly 21 is installed on the motor gearbox 12, the other end of the damping assembly 21 is connected with the chassis 1, and when the motor gearbox 12 moves up and down due to external bumping, the damping assembly 21 can play a role in buffering.

Further, in a preferred embodiment, as shown in fig. 5 and 6, the damping assembly 21 includes springs, wherein the number of the springs may be one or a plurality of springs, and when the number of the springs is a plurality, the plurality of springs are uniformly arranged between the motor gearbox 12 and the chassis 1, so as to achieve a good damping effect as a whole.

Specifically, as shown in fig. 5, the front driving device further includes a battery pack 14 and a PCBA board 15, the PCBA board 15 is electrically connected to the battery pack 14 and the motor gearbox 12, respectively, and the battery pack 14 supplies power to the power device 7, the motor gearbox 12, and the PCBA board 15, respectively.

The utility model discloses well PCBA board 15 is control center, can control power device 7, motor tooth case 12's action, in a preferred example, still includes the remote controller, is connected the control that realizes advancing, retreating, turning to the toy through remote controller and PCBA board 15 communication.

Specifically, as shown in fig. 5, the front driving device further includes a third joint 16 and a fourth joint 17, wherein a third through hole 22 and a fourth through hole 23 are respectively formed in two sides of the chassis 1, the third through hole 22 and the fourth through hole 23 are respectively of an oblong structure, a length direction of the oblong structure is perpendicular to a length direction of the chassis 1, one end of the third joint 16 is connected to one side of the motor gearbox 12, the other end of the third joint 16 penetrates through the third through hole 22 and extends to the outside of the chassis 1, one end of the fourth joint 17 is connected to the other side of the motor gearbox 12, and the other end of the fourth joint 17 penetrates through the fourth through hole 23 and extends to the outside of the chassis 1.

Specifically, as shown in fig. 1, the chassis 1 includes an upper chassis cover 24 and a lower chassis cover 25, and a lower portion of the upper chassis cover 24 is detachably mounted on an upper portion of the lower chassis cover 25, thereby facilitating battery replacement and simple maintenance.

Specifically, as shown in fig. 1, the upper portion of the upper chassis cover 24 includes a first connection surface 26, a second connection surface 27, and a third connection surface 28, and the first connection surface 26, the second connection surface 27, and the third connection surface 28 are connected in sequence and form a concave structure together; the lower chassis cover 25 is of an inverted concave structure.

Specifically, as shown in fig. 1, a plurality of insertion holes are respectively disposed on the first connection surface 26, the second connection surface 27, and the third connection surface 28; the front, the back, the left side and the right side of the lower base plate cover 25 are respectively provided with a plurality of inserting holes, and building blocks with different structural forms can be connected to form various structural shapes according to the requirements of players, for example, the building blocks are inserted into the upper part of the upper base plate cover 24 to form a car shed, so that the space imagination of children can be cultivated, the interestingness and the experience of the building blocks are increased, and the market competitiveness is enhanced.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims (10)

1. A toy with a chassis provided with a steering and buffering device is characterized by comprising a chassis (1), a front driving device and a rear driving device;

the front driving device and the rear driving device are respectively arranged at the front part and the rear part of the chassis (1);

the front driving device is provided with a motor gearbox (12) and a damping component (21);

one end of the shock absorption component (21) is arranged on the motor gearbox (12), and the other end of the shock absorption component (21) is connected with the chassis (1);

the rear driving device comprises a driving plate (6) and a steering joint, and the rear driving device can drive the driving plate (6) to drive the steering joint to swing towards the front or the rear of the chassis (1), so that the steering of the wheels is realized;

the rear driving device also comprises a connecting rod (2), and the steering joint comprises a first joint (3) and a second joint (4);

a first accommodating space (11) is formed in the chassis (1), and the connecting rod (2) and the drive plate (6) are both arranged in the first accommodating space (11);

one ends of the first joint (3) and the second joint (4) are respectively installed in the first accommodating space (11), and the other ends of the first joint (3) and the second joint (4) respectively extend to the outside of the chassis (1);

two ends of the connecting rod (2) are respectively movably matched with the first joint (3) and the second joint (4).

2. The toy with the chassis provided with the steering and buffering device is characterized in that the rear driving device further comprises a universal joint (5), and the driving plate (6) is movably matched with the first joint (3) through the universal joint (5);

when the drive plate (6) rotates, the drive plate (6) can drive the universal joint (5) to drive the first joint (3) to swing towards the front or the back of the chassis (1), and then the first joint (3) drives the second joint (4) to swing towards the front or the back of the chassis (1) synchronously through the connecting rod (2).

3. A toy with steering and damping device on its chassis according to claim 2, characterized in that the rear drive device further comprises a power device (7) and a transmission assembly (8);

the power device (7) can drive the driving plate (6) to rotate forwards or backwards through the transmission component (8).

4. Toy with chassis provided with steering and damping device according to claim 1, characterized in that the dial (6) comprises a dial wheel (9) and a plurality of dial levers (10);

the poke rods (10) are uniformly arranged along the circumferential direction of the poke wheel (9).

5. Toy with steering and damping device according to claim 1, characterized in that the front drive further comprises a coupling assembly (18);

a second accommodating space (13) is formed in the chassis (1), and the motor gearbox (12) and the connecting assembly (18) are installed in the second accommodating space (13);

one end of the connecting component (18) is rotatably arranged on the chassis (1), and the other end of the connecting component (18) is connected with the motor gearbox (12).

6. A toy with steering and cushioning device on its chassis according to claim 5, characterized in that said front driving device further comprises a battery pack (14) and a PCBA board (15);

the PCBA board (15) is electrically connected with the battery pack (14) and the motor gearbox (12) respectively.

7. Toy with steering and damping device according to claim 5 characterized in that the front driving device further comprises a third joint (16) and a fourth joint (17);

one end of the third joint (16) is connected with one side of the motor gearbox (12), and the other end of the third joint (16) extends to the outside of the chassis (1);

one end of the fourth joint (17) is connected with the other side of the motor gearbox (12), and the other end of the fourth joint (17) extends to the outside of the chassis (1).

8. Toy with steering and damping device according to claim 1, characterized in that the chassis (1) comprises an upper chassis cover (24) and a lower chassis cover (25);

the lower part of the upper chassis cover (24) is detachably arranged on the upper part of the lower chassis cover (25).

9. Toy with steering and cushioning device according to claim 8, characterized in that the upper part of the upper chassis cover (24) comprises a first (26), a second (27) and a third (28) attachment surface;

the first connecting surface (26), the second connecting surface (27) and the third connecting surface (28) form a concave structure together;

the lower chassis cover (25) is of an inverted concave structure;

a plurality of plug holes are respectively formed in the first connecting surface (26), the second connecting surface (27) and the third connecting surface (28);

the front, the back, the left side and the right side of the lower chassis cover (25) are respectively provided with a plurality of plug holes.

10. A toy with a chassis provided with a steering and buffering device is characterized by comprising a chassis (1), a front driving device and a rear driving device;

the front driving device and the rear driving device are respectively arranged at the front part and the rear part of the chassis (1);

a damping component (21) is arranged in the front driving device;

the rear driving device comprises a driving plate (6) and a steering joint, and the rear driving device can drive the driving plate (6) to drive the steering joint to swing towards the front or the rear of the chassis (1), so that the steering of the wheels is realized;

the rear driving device further comprises a connecting rod (2) and a universal joint (5), and the steering joint comprises a first joint (3) and a second joint (4);

a first accommodating space (11) is formed in the chassis (1), and the connecting rod (2), the universal joint (5) and the drive plate (6) are all arranged in the first accommodating space (11);

one ends of the first joint (3) and the second joint (4) are respectively installed in the first accommodating space (11), and the other ends of the first joint (3) and the second joint (4) respectively extend to the outside of the chassis (1);

two ends of the connecting rod (2) are respectively movably matched with the first joint (3) and the second joint (4);

the drive plate (6) is movably matched with the first joint (3) through a universal joint (5);

when the drive plate (6) rotates, the drive plate (6) can drive the universal joint (5) to drive the first joint (3) to swing towards the front or the back of the chassis (1), and then the first joint (3) drives the second joint (4) to synchronously swing towards the front or the back of the chassis (1) through the connecting rod (2);

the rear driving device also comprises a power device (7) and a transmission assembly (8);

the power device (7) can drive the driving plate (6) to rotate forwards or backwards through the transmission component (8);

the drive plate (6) comprises a drive wheel (9) and a plurality of drive rods (10);

the poke rods (10) are uniformly arranged along the circumferential direction of the poke wheel (9);

the front driving device comprises a motor gearbox (12) and a connecting component (18);

a second accommodating space (13) is formed in the chassis (1), and the motor gearbox (12) and the connecting assembly (18) are installed in the second accommodating space (13);

one end of the connecting component (18) is rotatably arranged on the chassis (1), and the other end of the connecting component (18) is connected with the motor gearbox (12);

one end of the shock absorption component (21) is arranged on the motor gearbox (12), and the other end of the shock absorption component (21) is connected with the chassis (1);

the front driving device also comprises a battery pack (14) and a PCBA board (15);

the PCBA board (15) is electrically connected with the battery pack (14) and the motor gearbox (12) respectively;

the front drive device further comprises a third joint (16) and a fourth joint (17);

one end of the third joint (16) is connected with one side of the motor gearbox (12), and the other end of the third joint (16) extends to the outside of the chassis (1);

one end of the fourth joint (17) is connected with the other side of the motor gearbox (12), and the other end of the fourth joint (17) extends to the outside of the chassis (1);

the chassis (1) comprises an upper chassis cover (24) and a lower chassis cover (25);

the lower part of the upper chassis cover (24) is detachably arranged on the upper part of the lower chassis cover (25);

the upper part of the upper chassis cover (24) comprises a first connecting surface (26), a second connecting surface (27) and a third connecting surface (28);

the first connecting surface (26), the second connecting surface (27) and the third connecting surface (28) form a concave structure together;

the lower chassis cover (25) is of an inverted concave structure;

a plurality of plug holes are respectively formed in the first connecting surface (26), the second connecting surface (27) and the third connecting surface (28);

the front, the back, the left side and the right side of the lower chassis cover (25) are respectively provided with a plurality of plug holes.

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