Small automatic driving bus chassis

Abstract

The utility model relates to the technical field of bus chassis, in particular to a small automatic driving bus chassis which comprises a chassis base, a damping piece is fixedly connected to the inner top wall of a positioning cylinder, a first buffer rod is fixedly connected to the top of a protection bottom plate, and a torsion rod is rotationally connected to the bottom of the protection bottom plate. The outer portion of the torsion bar is movably connected with a curved surface side plate, and the bottom of the protection bottom plate is movably connected with a second buffer rod. According to the small-sized automatic driving bus chassis, the damping piece is connected with the protective bottom plate, the first buffer rod is arranged at the top of the protective bottom plate, the impact on the protective bottom plate in the vertical direction is buffered and protected through elastic deformation of the first buffer spring, and then the torsion spring is movably connected with the torsion rod; the torsion bar is movably connected with the curved-surface side plate through a second supporting rod, and the curved-surface side plate is connected with a second buffer spring through a second buffer rod, so that impact on the curved-surface side plate in the horizontal direction is buffered and unloaded.

Description

Technical Field

[0001] The utility model relates to the technical field of bus chassis, and in particular to a small automatic driving bus chassis. Background Art

[0002] Self-driving cars, also known as driverless cars, are unmanned driving technologies that use intelligent systems to achieve automatic path planning and automatic obstacle avoidance. The chassis of a self-driving car refers to a combination of four parts on the car: the transmission system, the running system, the steering system, and the braking system. It supports and installs the car engine and its components and assemblies, forming the overall shape of the car and bearing the engine power to ensure normal driving.

[0003] After searching, it is found that a chassis of an autonomous driving vehicle is disclosed in a utility model patent with Chinese patent publication number CN220031901U. The chassis of the autonomous driving vehicle in the utility model patent is designed by designing a buffer plate structure under the chassis, and connecting the buffer plate to the chassis through a spring assembly, so that the buffer plate is used to block the impact on the chassis structure during driving. However, the spring assembly designed for the chassis of the autonomous driving vehicle is a vertical structure, which can reduce the impact from the vertical direction. Due to the unevenness of some roads, especially when the chassis of the vehicle passes through steep slopes, the buffer assembly may be hit in the horizontal direction and cause structural damage. Therefore, the chassis of the vehicle cannot effectively protect the buffer plate in the horizontal direction, and the anti-collision protection structure needs to be further improved. Therefore, a small autonomous driving bus chassis is proposed. Utility Model Content

[0004] In view of this, the purpose of the present utility model is to propose a small self-driving bus chassis to solve the problem that the self-driving car chassis in the patent cited in the above background technology cannot provide anti-collision protection against horizontal impacts that the buffer plate may be subjected to.

[0005] Based on the above purpose, the utility model provides a small self-driving bus chassis, including a chassis seat, and an anti-collision protection structure is provided at the bottom of the chassis seat;

[0006] The anti-collision protection structure includes a protective base plate, a positioning cylinder, a damping member, a first buffer rod, a torsion rod, a curved side plate and a second buffer rod. The bottom of the chassis seat is provided with a protective base plate, the bottom of the chassis seat is fixedly connected to the positioning cylinder, the inner top wall of the positioning cylinder is fixedly connected to the damping member, the top of the protective base plate is fixedly connected to the first buffer rod, the bottom of the protective base plate is rotatably connected to the torsion rod, the outside of the torsion rod is movably connected to the curved side plate, and the bottom of the protective base plate is movably connected to the second buffer rod.

[0007] Furthermore, the bottom of the chassis seat is provided with four mounting grooves, the number of the positioning tubes and damping members is four, and they are respectively located on the inner sides of the four mounting grooves, the protective bottom plate is a trapezoidal structure, and the bottoms of the four damping members are fixedly connected to the inner bottom wall of the protective bottom plate.

[0008] Furthermore, a No. 1 empty slot is provided on the top left side and the top right side of the protective bottom plate, the number of the first buffer rods is two, and they are respectively located inside the two No. 1 empty slots, the front and rear ends of each of the first buffer rods are sleeved with a first buffer spring, and the outside of each first buffer rod is slidably connected with two sliding sleeve blocks, and the outsides of the four sliding sleeve blocks are respectively fixedly connected to one end of the four first buffer springs.

[0009] Furthermore, each of the sliding sleeve blocks is hingedly connected to a first support rod at the top, and the tops of the four first support rods are hingedly connected to the bottom of the chassis seat. The bottom of the protective bottom plate is provided with two No. 2 empty slots, and the inner front wall and the inner rear wall of each No. 2 empty slot are fixedly connected to a torsion spring. There are two torsion rods, and the front and rear ends of the two torsion rods are respectively fixedly connected to one end of the four torsion springs.

[0010] Furthermore, the outside of the two torsion bars are fixedly connected with two second support rods, the number of the curved side plates is two, the inner sides of the two curved side plates are fixedly installed with bearing seats, the inner sides of the two bearing seats are rotatably connected with shafts, and the bottoms of the four second support rods are respectively fixedly connected to the outsides of the two shafts.

[0011] Furthermore, the bottom of the protective bottom plate is provided with two slide grooves, and the opposite sides of the two curved side plates are respectively slidably connected to the inner sides of the two slide grooves. The number of the second buffer rods is four, and one end of the four second buffer rods is respectively fixedly connected to the opposite sides of the two curved side plates, and the other ends of the four second buffer rods are fixedly connected with second buffer springs, and each of the second buffer springs is respectively fixedly connected to the inside of the four slide grooves at the end away from the second buffer rod.

[0012] Furthermore, a brake assembly is provided at the bottom of the chassis seat, and the brake assembly includes four bogies that are movably mounted on the bottom of the chassis seat, two of which have hub motors fixedly mounted on one side, and the other two bogies have front drive wheels fixedly mounted on one side.

[0013] Furthermore, a laser radar is fixedly installed at the bottom of the chassis seat, and four steering motors are fixedly installed at the bottom of the chassis seat, the output ends of the four steering motors are fixedly connected to reducers, each of the reducers is fixedly connected to a coupling on the side away from the steering motor, the four couplings are fixedly connected to the other side of the four bogies, and angle sensors are fixedly installed on the outside of the four couplings.

[0014] The beneficial effects of the utility model are as follows: the small self-driving bus chassis is connected to the protective base plate through a damping member at the bottom of the chassis seat, and a first buffer rod is arranged on the top of the protective base plate, the bottom of the chassis seat is slidably connected to the first buffer rod through a hinged first support rod, and the first buffer spring is elastically deformed to buffer the impact in the vertical direction received by the protective base plate, and then the torsion rod is movably connected to the torsion spring at the bottom of the chassis seat, the torsion rod is movably connected to the curved side plate through the second support rod, and the opposite side of the curved side plate is connected to the second buffer spring through the second buffer rod, when the curved side plate receives an impact from the horizontal direction, the torsion spring and the second buffer spring both undergo elastic deformation to buffer and unload the impact, thereby ensuring the anti-collision protection effect of the chassis seat in the vertical and horizontal directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a three-dimensional schematic diagram of the chassis seat structure of the utility model;

[0017] Figure 2 for Figure 1 Perspective front view;

[0018] Figure 3 for Figure 2 Schematic diagram of partial viewing angle;

[0019] Figure 4 for Figure 1 Perspective side view;

[0020] Figure 5 for Figure 1 Perspective top view;

[0021] Figure 6 for Figure 5 Schematic diagram of the hub motor structure from perspective.

[0022] The markings in the figure are:

[0023] 1. Chassis seat; 2. Anti-collision protection structure; 201. Protective bottom plate; 202. Positioning cylinder; 203. Damping element; 204. First buffer rod; 205. Torsion bar; 206. Curved side plate; 207. Second buffer rod; 3. Braking assembly; 301. Bogie; 302. Hub motor; 303. Front drive wheel; 304. LiDAR; 305. Steering motor; 306. Reducer; 307. Angle sensor. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0025] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] like Figure 2 and Figure 3 as well as Figure 4 As shown, four installation grooves are opened at the bottom of the chassis seat 1, and a positioning cylinder 202 is fixed inside each installation groove. The trapezoidal structure protection bottom plate 201 is fixedly connected to the inside of the positioning cylinder 202 through four damping members 203. When the protection bottom plate 201 receives an impact from the vertical direction, the damping characteristics of the damping members 203 can provide the first buffering protection for the impact in the vertical direction.

[0027] like Figure 2 and Figure 3 as well as Figure 4As shown, first buffer rods 204 are fixed in the No. 1 empty slots on the top left and top right of the protective bottom plate 201, and first buffer springs are sleeved and fixed at the front and rear ends of each first buffer rod 204, wherein two sliding sleeves are slidably mounted on the outside of each first buffer rod 204, and the four sliding sleeves are respectively connected to one end of the four first buffer springs, and the first buffer springs are used to buffer and block the movement of the sliding sleeves;

[0028] Then, the tops of the four sliding blocks are hinged to the bottom of the chassis seat 1 through the first support rod. When the protective bottom plate 201 is impacted in the vertical direction, the protective bottom plate 201 transfers the impact kinetic energy to the sliding block and the first support rod. The first support rod tilts and swings to make the sliding block slide to the side of the first buffer spring. The first buffer spring undergoes elastic deformation and converts the impact kinetic energy into elastic potential energy of its own deformation, thereby providing a second buffer protection against impact in the vertical direction.

[0029] like Figure 2 and Figure 3 as well as Figure 4 As shown, rotatable and resetting torsion springs are fixed to the inner front wall and the inner rear wall of the second empty slot at the bottom of the protective base plate 201, and the front and rear ends of the torsion rod 205 are respectively connected to the torsion springs. When the torsion rod 205 is rotated by force, the torsion spring can ensure that the torsion rod 205 returns to its original position under normal conditions.

[0030] like Figure 2 and Figure 3 as well as Figure 4 As shown, two second support rods are fixed to the outside of each torsion bar 205, and curved side plates 206 with arc structures are respectively arranged on the left side and the right side of the bottom of the protective bottom plate 201, and bearing seats are installed on the inner sides of the two curved side plates 206. The inner side of each bearing seat has a rotating shaft rod structure, and the bottoms of the four second support rods are respectively connected and fixed to the outside of the two shaft rods. When the curved side plate 206 is impacted from the horizontal direction, the curved side plate 206 drives the second support rod to tilt and swing, so that the torsion bar 205 and the torsion spring rotate.

[0031] like Figure 2 and Figure 3 as well as Figure 4 As shown, the opposite side of the curved side panel 206 is connected and fixed to one end of the second buffer rod 207, and the other end of the second buffer rod 207 is connected to the second buffer spring. When the curved side panel 206 shakes, the second buffer rod 207 squeezes the second buffer spring to convert the impact kinetic energy into elastic potential energy of deformation of the second buffer spring, thereby achieving buffering protection for the protective bottom plate 201 in the horizontal direction.

[0032] like Figure 5 and Figure 6 As shown, four bogies 301 are movably installed at the bottom of the chassis seat 1, two of which are installed and connected with the hub motor 302. The hub motor 302 is a combined structure of a motor and a wheel, which includes a comprehensive system of a power system, a transmission system, and a brake system, and can be used as a power source for the vehicle to travel. The other two bogies 301 are connected with the front drive wheel 303. When deceleration is required, the brake system in the hub motor 302 gradually reduces the driving power and brakes the front drive wheel 303.

[0033] like Figure 5 and Figure 6 As shown, the laser radar 304 is composed of three parts: a laser signal transmitting system, a signal receiving system and an information processing system. The laser transmitter converts the electrical pulse into a light pulse and transmits it. The laser receiver then converts the light pulse reflected from the target into an electrical pulse. Finally, the internal processor algorithm is used to obtain the target position distance and angle, motion state speed, vibration, posture and shape, and transmit the relevant data to the vehicle intelligent control system to achieve vehicle obstacle avoidance processing.

[0034] When the car needs to turn, the car intelligent control system controls the steering motor 305 to transmit the bogie 301 through the coupling, and the reducer 306 connects the steering motor 305 with the coupling, which can slow down the deflection speed of the bogie 301 and prevent the wheel structure from rotating too fast and causing the vehicle to lose control. At the same time, the angle sensor 307 is used to detect the deflection angle signal, and the angle signal is transmitted to the car intelligent control system, thereby controlling the steering motor 305 to control the angle amplitude of the bogie 301.

[0035] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0036] The utility model is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A small self-driving bus chassis, comprising a chassis seat (1), It is characterized in that An anti-collision protection structure (2) is provided at the bottom of the chassis seat (1); The anti-collision protection structure (2) comprises a protective bottom plate (201), a positioning cylinder (202), a damping member (203), a first buffer rod (204), a torsion rod (205), a curved side plate (206) and a second buffer rod (207); the bottom of the chassis seat (1) is provided with a protective bottom plate (201); the bottom of the chassis seat (1) is fixedly connected to the positioning cylinder (202); the inner top wall of the positioning cylinder (202) is fixedly connected to the damping member (203); the top of the protective bottom plate (201) is fixedly connected to the first buffer rod (204); the bottom of the protective bottom plate (201) is rotatably connected to the torsion rod (205); the outer part of the torsion rod (205) is movably connected to the curved side plate (206); and the bottom of the protective bottom plate (201) is movably connected to the second buffer rod (207).

2. A small self-driving bus chassis according to claim 1, It is characterized in that The bottom of the chassis seat (1) is provided with four installation grooves, the number of the positioning cylinders (202) and the damping members (203) is four and they are respectively located on the inner sides of the four installation grooves, the protective bottom plate (201) is a trapezoidal structure, and the bottoms of the four damping members (203) are fixedly connected to the inner bottom wall of the protective bottom plate (201).

3. A small self-driving bus chassis according to claim 1, It is characterized in that The top left side and the top right side of the protective bottom plate (201) are both provided with a No. 1 empty slot, the number of the first buffer rods (204) is two, and they are respectively located inside the two No. 1 empty slots, the front and rear ends of each first buffer rod (204) are sleeved with a first buffer spring, and the outside of each first buffer rod (204) is slidably connected to two sliding sleeve blocks, and the outsides of the four sliding sleeve blocks are respectively fixedly connected to one end of the four first buffer springs.

4. A small self-driving bus chassis according to claim 3, It is characterized in that The top of each sliding sleeve block is hinged with a first support rod, and the tops of the four first support rods are hinged with the bottom of the chassis seat (1). The bottom of the protective bottom plate (201) is provided with two No. 2 empty slots, and the inner front wall and the inner rear wall of each No. 2 empty slot are fixedly connected with a torsion spring. There are two torsion rods (205), and the front and rear ends of the two torsion rods (205) are respectively fixedly connected to one end of the four torsion springs.

5. A small self-driving bus chassis according to claim 1, It is characterized in that The outsides of the two torsion bars (205) are fixedly connected with two second support rods, the number of the curved side plates (206) is two, the inner sides of the two curved side plates (206) are fixedly installed with bearing seats, the inner sides of the two bearing seats are rotatably connected with shafts, and the bottoms of the four second support rods are respectively fixedly connected to the outsides of the two shafts.

6. A small self-driving bus chassis according to claim 1, It is characterized in that The bottom of the protective bottom plate (201) is provided with two slide grooves, and the opposite sides of the two curved side plates (206) are respectively slidably connected to the inner sides of the two slide grooves. The number of the second buffer rods (207) is four, and one end of the four second buffer rods (207) is respectively fixedly connected to the opposite sides of the two curved side plates (206), and the other ends of the four second buffer rods (207) are fixedly connected to second buffer springs, and each of the second buffer springs is respectively fixedly connected to the inside of the four slide grooves at one end away from the second buffer rod (207).

7. A small self-driving bus chassis according to claim 1, It is characterized in that A brake assembly (3) is provided at the bottom of the chassis seat (1), and the brake assembly (3) comprises four bogies (301) movably mounted on the bottom of the chassis seat (1), wherein one side of two of the bogies (301) is fixedly mounted with a hub motor (302), and one side of the other two of the bogies (301) is fixedly mounted with a front drive wheel (303).

8. A small self-driving bus chassis according to claim 7, It is characterized in that A laser radar (304) is fixedly installed at the bottom of the chassis base (1), and four steering motors (305) are fixedly installed at the bottom of the chassis base (1), the output ends of the four steering motors (305) are fixedly connected to reducers (306), each reducer (306) is fixedly connected to a coupling on a side away from the steering motor (305), the four couplings are fixedly connected to the other side of the four bogies (301), and the outsides of the four couplings are fixedly installed with angle sensors (307).

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