Frame structure for four-wheeler

Abstract

The utility model provides a frame structure for a four-wheeler, relates to a four-wheeler, belongs to the technical field of tools for riding instead of walk, and comprises a vehicle underframe, a front tire frame and a rear tire frame, the front tire frame and the rear tire frame are respectively and rotatably arranged at the front side part and the rear side part of the vehicle underframe, and a handlebar pipe is fixedly arranged at the front end part of the vehicle underframe; a steering connecting rod assembly is arranged between the handlebar pipe and the front tire frame, the front tire frame comprises a frame body, rotating cylinders and front wheels, the rotating cylinders are vertically and rotatably arranged on the two side portions of the frame body, and the front wheels are connected with the rotating cylinders. And the frame structure for the four-wheeler is simple to disassemble and assemble.

Description

Technical Field

[0001] The utility model belongs to the technical field of means of transport, and relates to a four-wheel vehicle, in particular to a frame structure used for the four-wheel vehicle. Background Art

[0002] With the rapid development of electric vehicle technology, the types of electric four-wheel vehicles are gradually increasing, and the frame structures of electric vehicles are also increasing. Electric four-wheel vehicles are also gradually built for people with limited mobility such as the elderly or the disabled to travel in the city. Sometimes they need to be parked in narrow places such as corridors, so the length and width of the vehicle need to be designed to be shorter than the conventional ones, and the steering structure design also needs to be simple. However, the steering mechanism of the existing electric four-wheel vehicle is generally controlled by the handlebars, and the direction of the handlebars and a series of complex connecting rod structures are used to realize the steering of the wheels. This type of steering mechanism has a complex structure, is not flexible in operation, is inconvenient to assemble, and needs to be matched with a specific frame. Utility Model Content

[0003] The utility model aims to provide a frame structure for a four-wheel vehicle which has a reasonable structure and is easy to assemble and disassemble.

[0004] The purpose of the utility model is achieved in this way:

[0005] The front wheel frame is connected to the steering column by the camshaft and the camshaft is connected to the steering column by the camshaft. The steering column is connected to the steering column by the camshaft. The camshaft is connected to the steering column by the camshaft. The camshaft is connected to the steering column by the camshaft.

[0006] In the above-mentioned frame structure for a four-wheeled vehicle, a reinforcing tube is further provided between the stem tube and the vehicle bottom frame, and a shock absorber 1 is provided between the reinforcing tube and the front tire frame.

[0007] In the above-mentioned frame structure for a four-wheel vehicle, there are two shock absorbers, and both ends of the shock absorbers are movably connected to the reinforcing tube and the front tire frame.

[0008] In the above-mentioned frame structure for a four-wheel vehicle, the vehicle chassis includes a bottom frame and a rear bracket connected to each other, and the rear tire frame is rotatably arranged below the bottom frame and movably connected to the rear bracket through a second shock absorber.

[0009] In the above-mentioned frame structure for a four-wheel vehicle, the rear bracket includes a left bracket, a right bracket and a connecting rod, the left bracket and the right bracket are both F-shaped structures, and the left bracket and the right bracket are connected together by a connecting rod.

[0010] In the above-mentioned frame structure for a four-wheel vehicle, the ball head connecting rod 1 and the ball head connecting rod 2 both include a connecting rod, a ball head seat and a hollow ball head, the hollow ball head is rotatably arranged in the ball head seat, and the ball head seat is connected to both ends of the connecting rod.

[0011] In the above-mentioned frame structure for a four-wheel vehicle, both ends of the connecting rod are respectively provided with external threads, the ball head seat is fixed with a connecting sleeve, and the connecting sleeve is provided with an internal thread used in conjunction with the external thread.

[0012] In the above-mentioned frame structure of the four-wheel vehicle, locking nuts are also provided at both ends of the connecting rod.

[0013] Compared with the prior art, the utility model has the following outstanding and beneficial technical effects:

[0014] The utility model forms a frame structure of a four-wheel vehicle through an underframe, a front tire frame, a rear tire frame and a steering link assembly, and the steering link assembly includes a steering rod, a steering plate, a ball head link 1 and a ball head link 2, wherein the steering rod is sleeved in a faucet pipe, and both ends extend out of the faucet pipe, the lower end of the steering rod is fixedly connected to one end of the steering plate, and the steering plate is connected to the ball head link 1 and the ball head link 2 through the ball head link 1, and the steering rod rotates, the steering plate can drive the ball head link 1 and the ball head link 2 to swing, the ball head link 2 drives the swing arm of the rotating cylinder to rotate, and also drives the wheels to turn, the overall structure is relatively simple, and the steering link is easy to install; at the same time, the front tire frame and the rear tire frame are damped with the underframe through the shock absorber 1 and the shock absorber 2, which can improve the riding experience of the driver. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is one of the structural diagrams of the utility model.

[0016] Figure 2 It is an enlarged view of point A of the present utility model.

[0017] Figure 3 This is the second structural diagram of the utility model.

[0018] Figure 4 It is an exploded view of the front tire rack and the steering link assembly of the utility model.

[0019] Figure 5 It is an exploded view of a ball head connecting rod 1 of the utility model.

[0020] 1-car chassis; 2-front tire rack; 3-rear tire rack; 4-steering rod; 5-steering plate; 6-ball head connecting rod 1; 7-ball head connecting rod 2; 11-lead pipe; 12-reinforcement pipe; 13-shock absorber 1; 14-shock absorber 2;

[0021] 21-frame; 22-rotating cylinder; 23-front wheel; 61-connecting rod; 62-ball head seat; 63-hollow ball head; 64-connecting sleeve; 65-locking nut; 101-bottom frame; 102-rear bracket; 221-swing arm; 1021-left bracket; 1022-right bracket; 1023-connecting rod. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to specific embodiments of the invention:

[0023] like Figure 1-Figure 5 As shown: a frame structure for a four-wheel vehicle, comprising a chassis 1, a front tire frame 2 and a rear tire frame 3, wherein the front tire frame 2 and the rear tire frame 3 are rotatably arranged on the front and rear sides of the chassis 1, and a faucet pipe 11 is fixedly arranged at the front end of the chassis 1, and a steering link assembly is arranged between the faucet pipe 11 and the front tire frame 2, and the front tire frame 2 comprises a frame body 21, a rotating cylinder 22 and a front wheel 23, the rotating cylinder 22 is vertically rotatably arranged on both sides of the frame body 21, and the front wheel 23 is connected to the rotating cylinder 22, and the steering link assembly comprises a steering rod 4, a steering plate 5, a ball head connecting rod 1 6 and a ball head connecting rod 2 7, a swing arm 221 is arranged on the front side of the rotating cylinder 22, and the two ends of the ball head connecting rod 2 7 are movably connected to the swing arm 221 of the rotating cylinder 22, one end of the ball head connecting rod 1 6 is movably connected to one end of the ball head connecting rod 2 7, and the other end It is movably connected to one end of the steering plate 5, and the steering plate 5 is fixed to the lower end of the steering rod 4. Specifically, the frame structure of a four-wheel vehicle is composed of the underframe, the front tire frame, the rear tire frame and the steering link assembly, and the steering link assembly includes a steering rod, a steering plate, a ball head connecting rod 1 and a ball head connecting rod 2, wherein the steering rod is sleeved in the faucet tube, and both ends extend out of the faucet tube, the lower end of the steering rod is fixedly connected to one end of the steering plate, and the steering plate is connected to the ball head connecting rod 2 through the ball head connecting rod 1, and when the steering rod rotates, the steering plate can drive the ball head connecting rod 1 and the ball head connecting rod 2 to swing, and the ball head connecting rod 2 drives the swing arm of the rotating cylinder to rotate, and also drives the wheel to steer, and the overall structure is relatively simple; specifically, steering seats are respectively provided on both sides of the frame, the swing arm is connected to the frame through the steering seats, and when the swing arm is swinging, if the rotation angle of the steering rod is too large, the steering seat will limit the swing arm from continuing to swing.

[0024] In the above-mentioned frame structure for a four-wheeled vehicle, a reinforcing tube 12 is further provided between the stem tube 11 and the underframe 1, and a shock absorber 13 is provided between the reinforcing tube 12 and the front tire frame 2. There are two shock absorbers 13, and both ends thereof are movably connected to the reinforcing tube 12 and the front tire frame 2. Specifically, connecting seats are respectively provided at both ends of the shock absorber, and the connecting seats are respectively fixedly connected to the reinforcing tube and the front tire frame, and the shock absorber is movably connected to the connecting seats. It is worth mentioning that the reinforcing tube extends from the underframe toward the stem tube, which can further improve the strength and toughness of the stem tube.

[0025] In the above-mentioned frame structure for a four-wheeled vehicle, the vehicle chassis 1 includes a bottom frame 101 and a rear bracket 102 that are connected to each other. The rear tire frame 3 is rotatably arranged below the bottom frame 101 and is movably connected to the rear bracket 102 through a second shock absorber 14. Specifically, there are two second shock absorbers, which are respectively located on the left and right sides of the rear bracket and the left and right sides of the rear tire frame; the rear tire frame is rotatably arranged below the bottom frame, and the bottom frame can disperse most of the gravity.

[0026] In the above-mentioned frame structure for a four-wheel vehicle, the rear bracket 102 includes a left bracket 1021, a right bracket 1022 and a connecting rod 1023. The left bracket 1021 and the right bracket 1022 are both F-shaped structures, and the left bracket 1021 and the right bracket 1022 are connected together by the connecting rod 1023. Specifically, the left bracket and the right bracket are connected to the vehicle frame by welding, and the bending parts of the left bracket and the right bracket adopt an arc transition. At the same time, the left bracket and the right bracket are further connected by two connecting rods. In this way, the overall strength and toughness of the rear bracket can be improved, and the overall buffering and shock absorption capacity can be improved.

[0027] In the above-mentioned frame structure for a four-wheel vehicle, the ball head connecting rod 1 6 and the ball head connecting rod 2 7 both include a connecting rod 61, a ball head seat 62 and a hollow ball head 63, the hollow ball head 63 is rotatably arranged in the ball head seat 62, and the ball head seat 62 is connected to both ends of the connecting rod 61, and the two ends of the connecting rod 61 are respectively provided with external threads, and the ball head seat 62 is fixed with a connecting sleeve 64, and the connecting sleeve 64 is provided with an internal thread used in conjunction with the external thread. The hollow ball head of the double ball head connecting rod 1 is movably connected to the connecting hole by bolts; the swing arm and the hollow ball head are also movably connected by bolts; it is worth mentioning that the double ball head connecting rod is adopted for the convenience of installation, and the connection can be carried out even if there are some errors. Specifically, this can extend or shorten the length of the double ball head connecting rod 1 and the double ball head connecting rod 2.

[0028] In the above-mentioned frame structure for a four-wheel vehicle, locking nuts 65 are further provided at both ends of the connecting rod 61. Specifically, an external threaded column is provided at the middle position of the wheel, and an internal threaded hole used in conjunction with the external threaded column is provided on the swing sleeve.

[0029] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A frame structure for a four-wheeled vehicle, comprising a vehicle chassis (1), a front tire frame (2) and a rear tire frame (3), characterized in that: The front tire frame (2) and the rear tire frame (3) are rotatably arranged on the front and rear sides of the vehicle bottom frame (1), respectively, and a faucet tube (11) is fixedly arranged on the front end of the vehicle bottom frame (1), and a steering link assembly is arranged between the faucet tube (11) and the front tire frame (2). The front tire frame (2) comprises a frame body (21), a rotating cylinder (22) and a front wheel (23), wherein the rotating cylinder (22) is vertically rotatably arranged on the two sides of the frame body (21), and the front wheel (23) is connected to the rotating cylinder (22). The steering link assembly comprises a steering rod (4), a steering plate (5), a ball head link rod 1 (6) and a ball head link rod 2 (7); a swing arm (221) is arranged on the front side of the rotating cylinder (22); two ends of the ball head link rod 2 (7) are movably connected to the swing arm (221) of the rotating cylinder (22); one end of the ball head link rod 1 (6) is movably connected to one end of the ball head link rod 2 (7); the other end of the ball head link rod 1 (6) is movably connected to one end of the steering plate (5); and the steering plate (5) is fixed to the lower end of the steering rod (4).

2. The frame structure for a four-wheeled vehicle according to claim 1, characterized in that: A reinforcing tube (12) is also provided between the faucet tube (11) and the vehicle bottom frame (1), and a shock absorber (13) is provided between the reinforcing tube (12) and the front tire frame (2).

3. The frame structure for a four-wheeled vehicle according to claim 2, characterized in that: There are two shock absorbers (13), and both ends of the shock absorbers are movably connected to the reinforcing tube (12) and the front tire frame (2).

4. The frame structure for a four-wheeled vehicle according to claim 1, 2 or 3, characterized in that: The vehicle bottom frame (1) comprises a bottom frame (101) and a rear support (102) which are connected to each other, and the rear tire frame (3) is rotatably arranged below the bottom frame (101) and is movably connected to the rear support (102) via a second shock absorber (14).

5. The frame structure for a four-wheeled vehicle according to claim 4, characterized in that: The rear bracket (102) comprises a left bracket (1021), a right bracket (1022) and a connecting rod (1023); the left bracket (1021) and the right bracket (1022) are both F-shaped structures, and the left bracket (1021) and the right bracket (1022) are connected together via the connecting rod (1023).

6. The frame structure for a four-wheeled vehicle according to claim 4, characterized in that: The ball head connecting rod 1 (6) and the ball head connecting rod 2 (7) both comprise a connecting rod (61), a ball head seat (62) and a hollow ball head (63); the hollow ball head (63) is rotatably arranged in the ball head seat (62), and the ball head seat (62) is connected to both ends of the connecting rod (61).

7. The frame structure for a four-wheeled vehicle according to claim 6, characterized in that: Both ends of the connecting rod (61) are respectively provided with external threads, the ball head seat (62) is fixedly provided with a connecting sleeve (64), and the connecting sleeve (64) is provided with an internal thread used in conjunction with the external thread.

8. The frame structure for a four-wheeled vehicle according to claim 7, characterized in that: Locking nuts (65) are also provided at both ends of the connecting rod (61).

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