Suspension assembly and tricycle

Abstract

The present invention belongs to the field of vehicle technology and discloses a suspension assembly and a tricycle. The suspension assembly includes a roll limiter assembly, two sets of suspension assemblies, and two wheel brackets. The two sets of suspension assemblies are symmetrically arranged on the left and right sides of the frame. The suspension assemblies each include an upper cantilever and a lower cantilever. The roll limiter assembly includes a first sliding rod, a second sliding rod, a first sleeve slidably plugged into the first sliding rod, and a second sleeve slidably plugged into the second sliding rod. The first sleeve is vertically connected to the second sleeve. The first sliding rod and the first sleeve are respectively rotatably connected to the two upper cantilever arms. The second sliding rod is rotatably connected to the frame and is provided with two limit blocks symmetrically arranged along the left and right directions of the frame. Both limit blocks can abut or separate from the frame. The roll limiter assembly limits the roll angle of the vehicle body to a safe range, avoids the tricycle from rolling over, and ensures the driving safety of the tricycle when turning.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a suspension assembly and a tricycle. Background Art

[0002] With economic development and social progress, various vehicle styles are developing towards personalization and comfort. As a lightweight means of transportation, tricycles, with their compact size, adequate cargo capacity, and ease of use, have attracted widespread attention both domestically and internationally. However, due to structural limitations, traditional tricycles cannot achieve free yaw when cornering, making it difficult to easily achieve cornering maneuvers, which can cause discomfort for those accustomed to riding two-wheeled vehicles.

[0003] Chinese patent document publication number CN206407056U discloses a front suspension swing structure for an inverted tricycle, in which four rocker arm mounting holes of different axes are provided on the connecting frame of the structure, and the right upper arm, right lower arm, left upper arm and left lower arm are all mounted on the connecting frame through a connecting shaft installed inside, and the right upper arm, right lower arm, left upper arm and left lower arm are respectively mounted to the right upper rotary hinge, right lower rotary hinge, left upper rotary hinge and left lower rotary hinge through the connecting shaft; the upper and lower hinge mounting holes of the steering knuckle are at a certain inclination angle to the ground, so that the front suspension has the characteristics of a car kingpin, taking into account the handling stability characteristics of a four-wheeled car and the flexibility of a two-wheeled vehicle. During turning, the mechanism automatically tilts, easily realizing the bending driving action, and the control is stable during riding.

[0004] However, the above solution still has the following technical problems: when the wheel of the reverse tricycle turns, the lateral inertia is too large, causing the wheel on the other side to leave the ground, which is prone to rollover and cause a safety accident. Summary of the Invention

[0005] The purpose of the present invention is to provide a suspension assembly and a tricycle to solve the technical problem of the tricycle turning when the wheels leave the ground.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] On the one hand, the present invention provides a suspension assembly, which includes a roll limiter component, two groups of suspension components and two wheel brackets, the two groups of suspension components are used to be symmetrically arranged on the left and right sides of the vehicle frame, each of the suspension components includes an upper cantilever and a lower cantilever, one end of the upper cantilever and one end of the lower cantilever are rotatably connected to the vehicle frame, the other end of the upper cantilever and the other end of the lower cantilever are ball-jointed with the wheel bracket, and the wheel bracket is used to install the wheel, the roll limiter component includes a first sliding rod, a second sliding rod, a first sleeve slidably plugged into the first sliding rod, and a second sleeve slidably plugged into the second sliding rod, the first sleeve is vertically connected to the second sleeve, the first sliding rod and the first sleeve are respectively rotatably connected to the two upper cantilever arms, the second sliding rod is rotatably connected to the vehicle frame and is provided with two limit blocks symmetrically arranged along the left and right directions of the vehicle frame, and the two limit blocks can abut or separate from the frame.

[0008] Preferably, the suspension assembly further includes a shock absorber, which includes a cylinder body and a piston rod slidably disposed on the cylinder body, and the cylinder body and the piston rod are rotationally connected to the two upper cantilevers respectively.

[0009] Preferably, the suspension assembly further comprises a spring, one end of the spring is fixed to the piston rod, and the other end of the spring is fixed to the cylinder body.

[0010] Preferably, the shock absorber is located directly above the roll limiting assembly.

[0011] Preferably, the suspension assembly also includes a steering rod, a steering linkage seat and a bearing, one end of the two steering rods are respectively ball-jointed with the two wheel brackets, the other end of the two steering rods are both ball-jointed with the steering linkage seat, and the steering linkage seat is rotatably connected to the frame through the bearing.

[0012] Preferably, the suspension assembly further comprises a steering shaft, a pull arm and a drive rod, the steering shaft is fixedly connected to the pull arm, and both ends of the drive rod are respectively ball-jointed with the pull arm and the steering linkage seat.

[0013] Preferably, the vehicle frame is further fixedly provided with a limit plate, a slide groove is provided on the limit plate, and a limit column is fixedly provided on the steering linkage seat, and the limit column is slidably located in the slide groove.

[0014] Preferably, the upper cantilever includes a first arm and a second arm connected in a V-shape, the connection between the first arm and the second arm is connected to a ball seat, a ball head is provided on the wheel bracket, and the ball seat and the ball head are ball-jointed; the end of the first arm away from the wheel bracket and the end of the second arm away from the wheel bracket are both rotatably connected to the frame.

[0015] Preferably, a connecting seat is protruding from the connection between the first arm and the second arm, wherein the connecting seat of one of the upper cantilever arms is rotatably connected to the first sleeve, and the connecting seat of the other upper cantilever arm is rotatably connected to the first sliding rod.

[0016] On the other hand, the present invention provides a tricycle, comprising a frame, a first wheel, two second wheels, and the suspension assembly described in any of the above schemes, wherein the first wheel is rotatably mounted on the frame and is located at one end of the tricycle in the front-rear direction, and the two second wheels are respectively mounted on two of the suspension assemblies and are both located at the other end of the tricycle in the front-rear direction.

[0017] Beneficial effects:

[0018] The present invention provides a suspension assembly and a tricycle, which suspension assembly includes a roll limit assembly, two groups of suspension assemblies and two wheel brackets, the two groups of suspension assemblies are used to be symmetrically arranged on the left and right sides of the frame, the suspension assemblies each include an upper cantilever and a lower cantilever, one end of the upper cantilever and one end of the lower cantilever are rotatably connected to the frame, the other end of the upper cantilever and the other end of the lower cantilever are ball-jointed with the wheel bracket, the wheel bracket is used to install the wheel, the roll limit assembly includes a first sliding rod, a second sliding rod, a first sleeve slidably plugged with the first sliding rod and a second sleeve slidably plugged with the second sliding rod, the first sleeve is vertically connected to the second sleeve, the first sliding rod and the first sleeve are respectively rotatably connected to the two upper cantilevers, the second sliding rod is rotatably connected to the frame and is provided with two limit blocks symmetrically arranged along the left and right directions of the frame, and the two limit blocks can abut or separate from the frame. The cooperation between the limit block and the frame effectively prevents the body from rolling too much when turning; the setting of the roll limit assembly limits the roll angle of the body to a safe range, preventing the tricycle from rolling over and ensuring the driving safety of the tricycle when turning. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the suspension assembly provided by the present invention;

[0020] Figure 2 This is a schematic structural diagram of the roll limiter assembly provided by the present invention after being assembled with the vehicle frame;

[0021] Figure 3This is a first axonometric view of the roll limiter assembly, suspension assembly, and vehicle frame provided by the present invention after assembly;

[0022] Figure 4 This is a second axonometric view of the roll limiter assembly, suspension assembly, and vehicle frame provided by the present invention after assembly;

[0023] Figure 5 It is a structural schematic diagram of a portion of the suspension assembly provided by the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the assembly between the steering tie rod, steering linkage seat, bearing and drive rod provided by the present invention;

[0025] Figure 7 It is a structural schematic diagram of the upper cantilever provided by the present invention.

[0026] In the picture:

[0027] 1. Roll limit assembly; 11. First sliding rod; 12. Second sliding rod; 13. First sleeve; 14. Second sleeve; 15. Limit block;

[0028] 2. Suspension assembly; 21. Upper cantilever; 211. First arm; 212. Second arm; 213. Ball seat; 214. Connecting seat; 22. Lower cantilever; 23. Shock absorber; 231. Cylinder; 232. Piston rod; 24. Spring;

[0029] 3. Wheel bracket; 31. Ball joint;

[0030] 4. Frame; 41. Limit plate;

[0031] 5. Steering rod;

[0032] 6. Steering linkage seat; 61. Bearing; 62. Limit column;

[0033] 7. Steering shaft;

[0034] 8. Pull arm;

[0035] 9. Drive rod. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0037] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0038] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0040] The present invention provides a tricycle comprising a frame 4, a first wheel, two second wheels, and a suspension assembly. The first wheel is rotatably mounted on the frame 4 and located at one end of the tricycle in the front-to-rear direction, and the two second wheels are respectively mounted on two suspension assemblies and located at the other end of the tricycle in the front-to-rear direction. The tricycle is particularly suitable for a reverse tricycle having a left and right front wheel with steering function and a single rear wheel with driving function. The provision of the suspension assembly effectively solves the technical problem of existing tricycles, wherein excessive lateral inertia causes the other wheel to lift off the ground and thus cause the tricycle to roll over during high-speed cornering, thereby effectively ensuring the driving safety of the tricycle.

[0041] See also Figures 1 to 4The suspension assembly includes a roll limiter assembly 1, two sets of suspension assemblies 2 and two wheel brackets 3. The two sets of suspension assemblies 2 are symmetrically arranged on the left and right sides of the frame 4. The suspension assemblies 2 each include an upper cantilever 21 and a lower cantilever 22. One end of the upper cantilever 21 and one end of the lower cantilever 22 are both rotatably connected to the frame 4. The other end of the upper cantilever 21 and the other end of the lower cantilever 22 are both ball-jointed with the wheel bracket 3. The wheel bracket 3 is used to install the wheel. The roll limiter assembly 1 includes a first sliding rod 1 1. A second sliding rod 12, a first sleeve 13 slidably connected to the first sliding rod 11, and a second sleeve 14 slidably connected to the second sliding rod 12. The first sleeve 13 and the second sleeve 14 are vertically connected. The first sliding rod 11 and the first sleeve 13 are respectively rotatably connected to the two upper cantilever arms 21. The second sliding rod 12 is rotatably connected to the frame 4 and is provided with two limit blocks 15 symmetrically spaced along the left and right directions of the frame 4. Both limit blocks 15 can abut or separate from the frame 4. The roll limit assembly 1 limits the roll angle of the vehicle body to a safe range, effectively preventing the tricycle from rolling over and ensuring the driving safety of the tricycle when turning.

[0042] Specifically, the first sliding rod 11 and the first sleeve 13 can slide axially relative to each other, and the second sliding rod 12 and the second sleeve 14 can slide axially relative to each other. The roll limit assembly 1 has a normal driving state and two roll states. The two roll states are respectively tilting to the left side of the vehicle and tilting to the right side of the vehicle. When in the normal driving state, the two limit blocks 15 are separated from the frame 4; when in the tilted state, one of the limit blocks 15 abuts against the frame 4, and the other limit block 15 is separated from the frame 4, and at this time the center of gravity of the tricycle will not cause the tricycle to roll over, thereby avoiding excessive roll angle of the vehicle body during turning, and thus preventing the other side wheel of the tricycle from leaving the ground during high-speed turning, thereby improving the safety performance of the tricycle.

[0043] In this embodiment, the roll limit assembly 1 and the suspension assembly 2 are decoupled so that the movements of the roll limit assembly 1 and the suspension assembly 2 will not interfere with each other, and the suspension stroke is independent of the roll limit assembly 1. This ensures that the tricycle has a large suspension stroke while effectively limiting the roll angle of the vehicle body, thereby effectively ensuring the stability of the tricycle when turning.

[0044] Specifically, a limit bracket is fixedly provided on the frame 4, and the limit bracket is rotatably connected to the second sliding rod 12 through a pin shaft. The limit bracket is provided with two baffles along the left and right sides of the frame 4, and the two limit blocks 15 can abut or separate from the baffle on the same side, thereby realizing the angle limitation of the roll limit assembly 1.

[0045] Furthermore, the suspension assembly 2 in this embodiment is an independent cantilever, and the wheels on each side are connected to the frame 4 through an independent cantilever, so that the left and right wheels do not interfere with each other, effectively reducing the tilt and vibration of the frame 4 and improving the stability and comfort of the tricycle.

[0046] See also Figure 1 、 Figure 3 、 Figure 4 and Figure 5 The suspension assembly also includes a shock absorber 23, which includes a cylinder 231 and a piston rod 232 slidably disposed in the cylinder 231. The cylinder 231 and the piston rod 232 are respectively connected to the two upper cantilevers 21 for rotation. Specifically, the cylinder 231 and the piston rod 232 are respectively connected to the two upper cantilevers 21 via a pin. The setting of the shock absorber 23 can suppress the impact of the road on the wheels and ensure the stability of the three-wheeled vehicle. Preferably, the shock absorber 23 is a hydraulic shock absorber. When the wheels move due to the vibration of the road, the piston rod 232 in the shock absorber 23 moves along the axial direction of the cylinder 231, and the oil in the cylinder 231 flows between the two chambers through the damping hole. At this time, the friction between the damping hole wall and the oil and the internal friction between the oil molecules generate a damping force, so that the vibration energy of the vehicle is converted into heat energy of the oil and diffused to the outside, thereby effectively buffering the vibration of the road on the wheels.

[0047] Furthermore, the suspension assembly includes a spring 24, one end of which is fixed to a piston rod 232, and the other end of which is fixed to a cylinder 231. The compression and extension of the spring 24 can reduce the wheel vibration caused by road bumps, while the damping force generated by the axial movement of the shock absorber 23 can effectively suppress the oscillation and jumping when the spring 24 rebounds, ensuring a smooth ride for the tricycle.

[0048] Furthermore, the shock absorber 23 is located directly above the roll limiting assembly 1 .

[0049] See also Figure 1 、 Figure 5 and Figure 6 The suspension assembly also includes a steering tie rod 5, a steering linkage seat 6, and a bearing 61. One end of each steering tie rod 5 is ball-jointed with each wheel bracket 3, and the other end of each steering tie rod 5 is ball-jointed with the steering linkage seat 6. The steering linkage seat 6 is rotatably connected to the vehicle frame 4 via the bearing 61. Specifically, the bearing 61 includes an inner ring and an outer ring. The inner ring is fixedly connected to the vehicle frame 4 via bolts, and the outer ring is fixedly connected to the steering linkage seat 6 via bolts, thereby rotatably connecting the steering linkage seat 6 to the vehicle frame 4.

[0050] See also Figure 1 and Figure 6The suspension assembly also includes a steering shaft 7, a pull arm 8, and a drive rod 9. The steering shaft 7 is fixedly connected to the pull arm 8, and the ends of the drive rod 9 are respectively connected to the pull arm 8 and the steering linkage seat 6 by ball joints. Specifically, the steering shaft 7 and the pull arm 8 are fixed together by welding. When the tricycle turns, the steering shaft 7 drives the pull arm 8 to rotate. At the same time, the drive rod 9 also moves and drives the steering linkage seat 6 to rotate around the frame 4, thereby driving the steering rods 5 on both sides of the frame 4 to move, achieving steering of the wheels while ensuring that the frame 4 is stationary.

[0051] See also Figure 1 、 Figure 5 and Figure 6 The frame 4 is also fixedly provided with a limit plate 41 having a slot therein. A limit post 62 is fixedly provided on the steering linkage seat 6, and the limit post 62 slides within the slot. The limit plate 41 is welded to the frame 4. The interaction between the slot of the limit plate 41 and the limit post 62 effectively limits the steering angle of the wheel. This not only prevents interference with other parts of the tricycle during wheel steering, but also prevents the tricycle from tipping over due to excessive steering angles.

[0052] See also Figure 3 、 Figure 5 and Figure 7 The upper cantilever 21 includes a first arm 211 and a second arm 212 connected in a V-shape. A ball socket 213 is connected to the junction of the first arm 211 and the second arm 212. The wheel bracket 3 is provided with a ball head 31, and the ball socket 213 and the ball head 31 are spherically hinged. The end of the first arm 211 away from the wheel bracket 3 and the end of the second arm 212 away from the wheel bracket 3 are both rotatably connected to the frame 4. By having the first arm 211 and the second arm 212 connected to the frame 4, the stability of the connection between the suspension assembly 2 and the frame 4 can be effectively ensured.

[0053] See also Figure 7 A connecting seat 214 is protruding from the connection between the first arm 211 and the second arm 212, wherein the connecting seat 214 of one upper cantilever 21 is rotatably connected to the first sleeve 13, and the connecting seat 214 of the other upper cantilever 21 is rotatably connected to the first sliding rod 11.

[0054] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Suspension assembly, characterized in that, The suspension assembly comprises a roll limit assembly (1), two groups of suspension assemblies (2) and two wheel brackets (3). The two groups of suspension assemblies (2) are symmetrically arranged on the left and right sides of the vehicle frame (4). The suspension assemblies (2) each comprise an upper cantilever (21) and a lower cantilever (22). One end of the upper cantilever (21) and one end of the lower cantilever (22) are both rotatably connected to the vehicle frame (4). The other end of the upper cantilever (21) and the other end of the lower cantilever (22) are both spherically connected to the wheel bracket (3). The wheel bracket (3) is used to install a wheel. The roll limit assembly (1) comprises a first sliding rod (11). , a second sliding rod (12), a first sleeve (13) slidably plugged into the first sliding rod (11), and a second sleeve (14) slidably plugged into the second sliding rod (12), the first sleeve (13) and the second sleeve (14) being vertically connected, the first sliding rod (11) and the first sleeve (13) being rotatably connected to the two upper cantilever arms (21) respectively, the second sliding rod (12) being rotatably connected to the vehicle frame (4) and provided with two limit blocks (15) symmetrically arranged at intervals along the left-right direction of the vehicle frame (4), and the two limit blocks (15) can both abut against or separate from the vehicle frame (4); The suspension assembly further comprises a steering rod (5), a steering linkage seat (6) and a bearing (61), one end of each of the two steering rods (5) being respectively connected to a ball joint with the two wheel brackets (3), and the other end of each of the two steering rods (5) being connected to a ball joint with the steering linkage seat (6), and the steering linkage seat (6) being rotatably connected to the vehicle frame (4) via the bearing (61); The suspension assembly further comprises a steering shaft (7), a pulling arm (8) and a driving rod (9), wherein the steering shaft (7) is fixedly connected to the pulling arm (8), and both ends of the driving rod (9) are respectively connected to the pulling arm (8) and the steering linkage seat (6) by ball joints; The vehicle frame (4) is further fixedly provided with a limit plate (41), a slide groove is provided on the limit plate (41), and a limit column (62) is fixedly provided on the steering linkage seat (6), and the limit column (62) is slidably located in the slide groove.

2. The suspension assembly according to claim 1, characterized in that: The suspension assembly further comprises a shock absorber (23), wherein the shock absorber (23) comprises a cylinder (231) and a piston rod (232) slidably arranged on the cylinder (231), and the cylinder (231) and the piston rod (232) are respectively rotatably connected to the two upper cantilever arms (21).

3. The suspension assembly according to claim 2, characterized in that: The suspension assembly further comprises a spring (24), one end of the spring (24) is fixed to the piston rod (232), and the other end of the spring (24) is fixed to the cylinder body (231).

4. The suspension assembly according to claim 2, characterized in that: The shock absorber (23) is located directly above the roll limiting assembly (1).

5. The suspension assembly according to claim 1, characterized in that: The upper cantilever (21) comprises a first support arm (211) and a second support arm (212) connected in a V-shape; the connection between the first support arm (211) and the second support arm (212) is connected to a ball seat (213); a ball head (31) is provided on the wheel bracket (3); the ball seat (213) and the ball head (31) are spherically hinged; one end of the first support arm (211) away from the wheel bracket (3) and one end of the second support arm (212) away from the wheel bracket (3) are both rotatably connected to the vehicle frame (4).

6. The suspension assembly according to claim 5, characterized in that: A connecting seat (214) is protruding from the connection between the first support arm (211) and the second support arm (212), wherein the connecting seat (214) of one of the upper cantilever arms (21) is rotatably connected to the first sleeve (13), and the connecting seat (214) of the other upper cantilever arm (21) is rotatably connected to the first sliding rod (11).

7. A tricycle, characterized in that: The tricycle comprises a frame (4), a first wheel, two second wheels, and a suspension assembly as described in any one of claims 1 to 6, wherein the first wheel is rotatably mounted on the frame (4) and is located at one end of the tricycle in the front-rear direction, and the two second wheels are respectively mounted on two of the suspension assemblies and are both located at the other end of the tricycle in the front-rear direction.

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