Chassis structure of four-wheel-drive vehicle

Abstract

The utility model relates to the technical field of child electric vehicles, in particular to a four-wheel drive chassis structure which comprises a main frame part, a front axle structure and a rear axle structure, the main frame part comprises a vehicle body main frame, a group of front axle connecting pieces are longitudinally arranged in the middle of the front of the vehicle body main frame, and a rear axle connecting piece is arranged at the rear end of the vehicle body main frame. A control rod is arranged in the middle of the vehicle body main frame, the lower end of the front axle connecting piece is rotationally connected with a front axle structure, and the rear side of the rear axle connecting piece is rotationally connected with a rear axle structure. The main frame part is longitudinally and rotatably connected with the front axle structure, the front axle structure can longitudinally rotate to adapt to the terrain when encountering an uneven road surface, the stability of a vehicle is improved, the main shaft part can be simultaneously matched with a crawler belt and a power wheel, a differential axle and a disc brake are used for turning, the turning radius is reduced, and the turning efficiency is improved. The toy is more suitable for being played in narrow and small environments such as indoor places, interestingness is increased, and meanwhile operation ability and coordination of children can be cultivated.

Description

Technical Field

[0001] The utility model relates to the technical field of children's electric vehicles, in particular to a chassis structure of a four-wheel drive vehicle. Background Art

[0002] Children's electric cars are electric toy cars designed for children, aiming to provide a safe and fun entertainment experience and promote children's growth and development through various functional features. This type of toy car on the market mainly includes electric cars, electric motorcycles, electric engineering vehicles and plush toy electric cars. The functional features of children's electric cars are safety, entertainment and education. Some children's electric cars on the market are also equipped with remote controls and voice control functions, making it easier for children to interact and play. Children's electric cars are suitable for children to have entertainment and activities at home or in the park, allowing them to experience the fun of driving.

[0003] Through searching, the public announcement number CN208915318U discloses a children's electric vehicle, which includes a frame, a front wheel, a rear wheel, a motor for driving the front wheel to rotate, a steering mechanism for driving the front wheel to turn, and a seat with a backrest. The utility model children's electric vehicle applies force to the backrest to drive the rear support frame to move, so that the rear wheel is lifted and the universal wheel touches the ground. At this time, the steering generates drift during travel, which is easy to operate, simple in structure, and low in cost.

[0004] However, the children's electric car has the following problems:

[0005] 1. The utility model adopts front-wheel drive, which has relatively weak traction ability and is prone to slipping or loss of control. It also has a large turning radius and requires a larger turning angle when turning, which requires a larger area of ​​the site where the children's electric vehicle is used, making it inconvenient to use and reducing the fun and driving pleasure.

[0006] 2. When the utility model is driven on a rough, bumpy road or a road with a lot of dust and mud in an outdoor environment such as a park, it cannot be driven stably, which may cause safety hazards. Utility Model Content

[0007] In view of the existing problems, the utility model provides a four-wheel drive vehicle chassis structure to solve the problems raised in the above background technology.

[0008] In order to solve the above problems, the utility model provides a four-wheel drive chassis structure, including a main frame part, a front axle structure and a rear axle structure, the main frame part includes a vehicle body main frame, a group of front axle connecting parts are arranged in the longitudinal center in front of the vehicle body main frame, a cross frame is connected to the middle and lower part of the vehicle body main frame, a speed regulating pedal is arranged on the front side of the cross frame, a second frame is connected to the rear end of the upper side of the vehicle body main frame, a group of rear axle connecting parts are symmetrically arranged at the rear end of the vehicle body main frame, a group of batteries are installed above the cross frame, a control lever is arranged in the middle position of the vehicle body main frame, a left brake grip and a right brake grip are symmetrically arranged on the upper end of the control lever, a left disc brake pipe is connected to the left brake grip, a right disc brake pipe is connected to the right brake grip, a group of the front axle connecting parts are rotatably connected to the front axle structure at the lower end, and a group of the rear axle connecting parts are rotatably connected to the front axle structure. The rear side is rotatably connected with the rear axle structure; the front axle structure includes a front axle frame, a first differential bridge is installed at the center of the lower side of the front axle frame, the input end of the first differential bridge is transmission-connected with the output end of the first motor, the two output ends of the first differential bridge are respectively connected to the first left main shaft and the first right main shaft, the first left main shaft is provided with a first left disc brake, and the first right main shaft is provided with a first right disc brake; the rear axle structure includes a rear axle frame, a shock-absorbing spring support rod is provided in the middle of the rear axle frame, and a second differential bridge is installed on the lower side of the rear axle frame, the input end of the second differential bridge is transmission-connected with the output end of the second motor, the two output ends of the second differential bridge are respectively connected to the second left main shaft and the second right main shaft, the second left main shaft is provided with a second left disc brake, and the second right main shaft is provided with a second right disc brake.

[0009] Furthermore, the ends of the first left main shaft and the first right main shaft are connected with track wheels, and the ends of the second left main shaft and the second right main shaft are connected with drive wheels, and the two can be replaced with each other, or two sets of track wheels or two sets of drive wheels can be connected at the same time.

[0010] Furthermore, the main frame part also includes a set of disc brake pipe tees, the left disc brake pipe and the right disc brake pipe are respectively divided into two branch pipes by the disc brake pipe tees, the left brake handle is respectively connected to the first left disc brake and the second left disc brake after being split by the left disc brake pipe, and the right brake handle is respectively connected to the first right disc brake and the second right disc brake after being split by the right disc brake pipe.

[0011] Furthermore, a shock absorbing spring is arranged in the middle of the upper end of the shock absorbing spring support rod, and the other end of the shock absorbing spring is connected to the middle of the second frame.

[0012] Furthermore, the power of the first motor and the second motor is provided by a group of batteries respectively.

[0013] Furthermore, the speed regulating pedal, the first motor, the second motor, the battery and the control rod are electrically connected.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The utility model abandons the traditional turning method by setting a differential bridge and a disc brake assembly, and instead uses the differential bridge and the disc brake assembly to turn, which can achieve a smaller turning radius, or even turn on the spot, and is more suitable for playing in a relatively narrow environment such as an indoor venue. The new turning method not only increases the fun, but also can cultivate children's operating ability and coordination.

[0016] 2. The utility model is connected to the front axle structure through the longitudinal rotation of the main frame part and the rear axle structure through the transverse rotation. When encountering uneven roads in outdoor environments such as parks, the front axle structure can adapt to the terrain through the longitudinal rotation of the front axle structure, so that the entire chassis structure can be grounded on all four wheels during driving, which greatly improves the stability of the vehicle and is suitable for all-terrain driving.

[0017] 3. The main shaft part of the utility model can be adapted to the crawler track and the power wheel at the same time, and can be replaced according to the needs in different environments such as indoor venues or outdoor parks, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of a four-wheel drive vehicle chassis structure;

[0019] Figure 2 It is a schematic diagram of the main frame part of a four-wheel drive vehicle chassis structure;

[0020] Figure 3 It is a schematic diagram of the front axle structure of a four-wheel drive vehicle chassis structure;

[0021] Figure 4 It is a schematic diagram of the rear axle structure of a four-wheel drive vehicle chassis structure;

[0022] Figure 5 It is a partial schematic diagram of a disc brake pipe tee of a four-wheel drive vehicle chassis structure;

[0023] Figure 6 It is a partial schematic diagram of a shock absorbing spring of a four-wheel drive vehicle chassis structure;

[0024] Description of the numbers in the figure:

[0025] 1. Main frame; 101. Main frame; 102. Front axle connector; 103. Cross frame; 104. Speed ​​control pedal; 105. Second frame; 106. Rear axle connector; 107. Battery; 108. Control lever; 109. Left brake handle; 110. Right brake handle; 111. Left disc brake pipe; 112. Right disc brake pipe; 113. Fixing piece; 114. Disc brake pipe tee; 2. Front axle structure; 201. Front axle frame; 202. First differential axle ; 203, first motor; 204, first left spindle; 205, first right spindle; 206, first left disc brake; 207, first right disc brake; 3, rear axle structure; 301, rear axle frame; 302, shock-absorbing spring support rod; 303, second motor; 304, second differential axle; 305, second left spindle; 306, second right spindle; 307, second left disc brake; 308, second right disc brake; 4, shock-absorbing spring; 5, track wheel; 6, driving wheel. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-Figure 6The utility model provides a four-wheel drive chassis structure, including a main frame part 1, a front axle structure 2 and a rear axle structure 3. The main frame part 1 includes a vehicle body main frame 101, a group of front axle connecting members 102 are arranged in the longitudinal center of the front of the vehicle body main frame 101, a cross frame 103 is connected to the middle and lower part of the vehicle body main frame 101, a speed regulating pedal 104 is arranged on one side in front of the cross frame 103, a second frame 105 is connected to the upper rear end of the vehicle body main frame 101, and a group of rear axle connecting members 102 are arranged symmetrically at the rear end of the vehicle body main frame 101. A group of batteries 107 are installed above the cross frame 103, a control rod 108 is arranged in the middle of the main frame 101 of the vehicle body, and a left brake handle 109 and a right brake handle 110 are symmetrically arranged on the upper end of the control rod 108, a left disc brake pipe 111 is connected to the left brake handle 109, and a right disc brake pipe 112 is connected to the right brake handle 110, a group of the front axle connecting members 102 are rotatably connected to the front axle structure 2 at the lower end, and a group of the rear axle connecting members 106 are rotatably connected to the rear side of the rear axle connecting members 106. The front axle structure 2 includes a front axle frame 201, a first differential axle 202 is installed at the center of the lower side of the front axle frame 201, the input end of the first differential axle 202 is connected to the output end of the first motor 203, the two output ends of the first differential axle 202 are respectively connected to the first left spindle 204 and the first right spindle 205, the first left spindle 204 is provided with a first left disc brake 206, the first right spindle 205 is provided with a first right disc brake 207; the rear axle structure The rear axle frame 301 includes a rear axle frame 301, a damping spring support rod 302 is arranged in the middle of the rear axle frame 301, a second differential bridge 304 is installed at the lower side of the rear axle frame 301, an input end of the second differential bridge 304 is drivingly connected to an output end of a second motor 303, two output ends of the second differential bridge 304 are respectively connected to a second left spindle 305 and a second right spindle 306, a second left disc brake 307 is arranged on the second left spindle 305, and a second right disc brake 308 is arranged on the second right spindle 306.

[0028] Among them, the ends of the first left main shaft 204 and the first right main shaft 205 are connected with track wheels 5, and the ends of the second left main shaft 305 and the second right main shaft 306 are connected with drive wheels 6, and the two can be replaced with each other, or two sets of track wheels 5 or two sets of drive wheels 6 can be connected at the same time.

[0029] Among them, the main frame part 1 also includes a set of disc brake pipe tees 113, the left disc brake pipe 111 and the right disc brake pipe 112 are respectively divided into two branch pipes through the disc brake pipe tee 113, the left brake lever 109 is connected to the first left disc brake 206 and the second left disc brake 307 respectively after being diverted by the left disc brake pipe 111, and the right brake lever 110 is connected to the first right disc brake 207 and the second right disc brake 308 respectively after being diverted by the right disc brake pipe 112.

[0030] A shock absorbing spring 4 is arranged in the middle of the upper end of the shock absorbing spring support rod 302 , and the other end of the shock absorbing spring 4 is connected to the middle of the second frame 105 .

[0031] The power of the first motor 203 and the second motor 303 are respectively provided by a group of batteries 107 .

[0032] The speed regulating pedal 104 , the first motor 203 , the second motor 303 , the battery 107 and the control rod 108 are electrically connected, and the above parts together constitute a power assembly.

[0033] Among them, the left brake handle 109, the right brake handle 110, the left disc brake pipe 111, the right disc brake pipe 112, the disc brake pipe tee 113, the first left disc brake 206, the first right disc brake 207, the second left disc brake 307, and the second right disc brake 308 together constitute a brake assembly; in other embodiments, the above-mentioned brake assembly can also adopt other braking forms, such as drum brakes, holding brakes, etc.

[0034] Among them, the control method of the brake assembly and the power assembly can be changed according to the specific embodiment. For example, the control method of the power assembly can use the throttle power lever set on the control rod 108, while the control method of the brake assembly can use the brake pedals set on both sides in front of the cross frame 103.

[0035] Specific embodiments of the utility model:

[0036] When the utility model is driving, the first motor 203 and the second motor 303 are started by the control rod 108, and the speed regulating pedal 104 is stepped on to control the first motor 203 and the second motor 303, the first motor 203 drives the first left main shaft 204 and the first right main shaft 205, the second motor 303 drives the second left main shaft 305 and the second right main shaft 306, and then drives the crawler wheel 5 or the driving wheel 6 at the moving end of the main shaft to move forward; when encountering uneven roads or obstacles, the front axle structure 2 can be rotated longitudinally as a whole through the front axle connecting member 102, so that the chassis structure of the four-wheel drive vehicle always has four wheels on the ground during driving; when turning, such as turning left, the control rod 107 is squeezed The left brake handle 109 in the corresponding direction drives the first left disc brake 206 and the second left disc brake 307 to be tightened through the left disc brake pipe 111, and the rotation speed of the first left main shaft 204 and the second left main shaft 305 and the track wheels 5 or the driving wheels 6 on the corresponding main shafts is reduced. At the same time, under the action of the first differential bridge 202 and the second differential bridge 304, the rotation speed of the first right main shaft 205 and the second right main shaft 306 will be accelerated, and the speed difference in the left and right directions is used to complete the turn. The turning radius will change according to the tightening and deceleration degree of the left brake handle 109. The greater the tightening and deceleration degree, the smaller the turning radius. While increasing the fun, it can also cultivate children's operating ability and coordination.

[0037] In this embodiment, the start, stop, forward and reverse rotation of the first motor 203 and the second motor 303 are all controlled by the control rod 108 , and the output power of the first motor 203 and the second motor 303 is controlled by the speed regulating pedal 104 .

[0038] In this embodiment, when driving in an outdoor environment, the ends of the main shaft can be completely replaced with track wheels 5 to obtain better traction and to more easily overcome obstacles such as stones, tree roots, etc.; when driving in an indoor environment, the ends of the main shaft can be completely replaced with drive wheels 6 to obtain better handling performance and driving efficiency, and the vehicle steering is also more flexible.

[0039] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A four-wheel drive vehicle chassis structure, comprising a main frame portion (1), a front axle structure (2) and a rear axle structure (3), characterized in that: The main frame part (1) comprises a vehicle body main frame (101), a group of front axle connecting members (102) are arranged in the longitudinal center of the front of the vehicle body main frame (101), a cross frame (103) is connected to the middle and lower part of the vehicle body main frame (101), a speed regulating pedal (104) is arranged on the front side of the cross frame (103), a second frame (105) is connected to the rear end of the upper side of the vehicle body main frame (101), a group of rear axle connecting members (106) are arranged symmetrically at the rear end of the vehicle body main frame (101), and a group of batteries are installed above the cross frame (103). (107), a control rod (108) is arranged in the middle position of the vehicle body main frame (101), and a left brake handle (109) and a right brake handle (110) are symmetrically arranged on the upper end of the control rod (108), a left disc brake pipe (111) is connected to the left brake handle (109), and a right disc brake pipe (112) is connected to the right brake handle (110), a group of the lower ends of the front axle connecting members (102) are rotatably connected to the front axle structure (2), and a group of the rear sides of the rear axle connecting members (106) are rotatably connected to the rear axle structure (3); The front axle structure (2) comprises a front axle frame (201), a first differential axle (202) is installed at the center of the lower side of the front axle frame (201), the input end of the first differential axle (202) is drivingly connected to the output end of the first motor (203), the two output ends of the first differential axle (202) are respectively connected to a first left main shaft (204) and a first right main shaft (205), the first left main shaft (204) is provided with a first left disc brake (206), and the first right main shaft (205) is provided with a first right disc brake (207); The rear axle structure (3) comprises a rear axle frame (301), a shock-absorbing spring support rod (302) is arranged in the middle of the rear axle frame (301), a second differential bridge (304) is installed on the lower side of the rear axle frame (301), the input end of the second differential bridge (304) is drivingly connected to the output end of the second motor (303), the two output ends of the second differential bridge (304) are respectively connected to the second left main shaft (305) and the second right main shaft (306), the second left main shaft (305) is provided with a second left disc brake (307), and the second right main shaft (306) is provided with a second right disc brake (308).

2. A four-wheel drive vehicle chassis structure according to claim 1, characterized in that: The ends of the first left main shaft (204) and the first right main shaft (205) are connected to track wheels (5), and the ends of the second left main shaft (305) and the second right main shaft (306) are connected to drive wheels (6), and the two can be replaced with each other, or two sets of track wheels (5) or two sets of drive wheels (6) can be connected at the same time.

3. A four-wheel drive vehicle chassis structure according to claim 1, characterized in that: The main frame part (1) also includes a set of disc brake pipe tees (113), and the left disc brake pipe (111) and the right disc brake pipe (112) are respectively divided into two branch pipes through the disc brake pipe tees (113). The left brake handle (109) is connected to the first left disc brake (206) and the second left disc brake (307) respectively after being split through the left disc brake pipe (111), and the right brake handle (110) is connected to the first right disc brake (207) and the second right disc brake (308) respectively after being split through the right disc brake pipe (112).

4. A four-wheel drive vehicle chassis structure according to claim 1, characterized in that: A shock absorbing spring (4) is arranged in the middle of the upper end of the shock absorbing spring support rod (302), and the other end of the shock absorbing spring (4) is connected to the middle of the second frame (105).

5. The four-wheel drive vehicle chassis structure according to claim 1, characterized in that: The power of the first motor (203) and the second motor (303) is respectively provided by a group of batteries (107).

6. A four-wheel drive vehicle chassis structure according to claim 5, characterized in that: The speed regulating pedal (104), the first motor (203), the second motor (303), the battery (107) and the control rod (108) are electrically connected.

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