Tricycle air suspension and tricycle

Abstract

A kind of tricycle air suspension mechanism and tricycle, it is related to the field of vehicle, it includes frame, rear axle, swing arm, buffer telescopic cylinder and transmission assembly, one end of swing arm is connected with rear axle, the other end of swing arm is rotatably installed on frame around preset axis;Two ends of rear axle are used to install wheel;Buffer telescopic cylinder includes cylinder body and piston rod, piston rod and cylinder body slidably cooperate, one of cylinder body and piston rod is rotatably connected with frame, the other is connected to rear axle by transmission assembly.It can improve the damping effect of tricycle driving on bumpy road, not easy to damage failure, safe to use, long service life.

Description

Technical Field

[0001] This utility model relates to the field of transportation vehicles, and more specifically, to an air suspension mechanism for a tricycle and a tricycle. Background Technology

[0002] Electric tricycles are three-wheeled transportation vehicles powered by batteries and driven by motors, used for hauling goods or passengers. To improve comfort when traversing bumpy roads, tricycles are generally equipped with shock absorbers. In current technology, the shock absorbers on tricycles typically employ a damping and spring combination mechanism.

[0003] The inventors discovered during their research that existing tricycle shock absorption mechanisms have at least the following drawbacks:

[0004] During use, the damping and spring may break, posing a significant safety hazard; moreover, the shock absorption mechanism has a short service life and high maintenance costs. Utility Model Content

[0005] The purpose of this utility model includes, for example, providing a tricycle air suspension mechanism and a tricycle that can improve the shock absorption effect of the tricycle when driving on bumpy roads, is not easily damaged or failed, is safe to use, and has a long service life.

[0006] The embodiments of this utility model can be implemented as follows:

[0007] In a first aspect, this utility model provides an air suspension mechanism for a three-wheeled vehicle, including a frame, a rear axle, a swing arm, a buffer telescopic cylinder, and a transmission assembly, wherein:

[0008] One end of the swing arm is connected to the rear axle, and the other end of the swing arm is rotatably mounted on the frame around a preset axis; both ends of the rear axle are used to mount wheels.

[0009] The buffer telescopic cylinder includes a cylinder body and a piston rod, the piston rod being slidably engaged with the cylinder body, one of the cylinder body and the piston rod being rotatably connected to the vehicle frame, and the other of the two being connected to the rear axle via the transmission assembly.

[0010] In an optional embodiment, the frame includes a body, a connecting shaft, and a connecting tube. The connecting shaft is fixed to the body, and the axis of the connecting shaft coincides with the preset axis. The connecting tube is rotatably mounted on the connecting shaft. One end of the swing arm is mounted on the connecting tube. One of the cylinder and the piston rod is connected to the connecting tube.

[0011] In an optional embodiment, the cylinder and the piston rod cooperate to define a rod chamber and a rodless chamber. The rod chamber is used to store high-pressure gas, and the rodless chamber is in communication with the outside. When the swing arm drives the rear axle to swing closer to the frame, the piston rod and the cylinder move under the drive of the transmission assembly, so that the volume of the rod chamber tends to decrease.

[0012] In an optional embodiment, the buffer telescopic cylinder further includes a valve, which is installed in the cylinder body and communicates with the rod chamber.

[0013] In an optional embodiment, the transmission assembly includes an arc-shaped rack, a transmission gear, and a spur rack; one end of the arc-shaped rack is mounted to the vehicle frame, and the other end is suspended; the transmission gear is rotatably mounted to the rear axle; one end of the spur rack is connected to the cylinder or the piston rod, and the other end is suspended.

[0014] The arc-shaped rack has an arc-shaped surface, and the axis of the cylinder on which the arc-shaped surface is located coincides with the preset axis; the teeth of the arc-shaped rack are provided on the arc-shaped surface; both the teeth and the straight rack mesh with the transmission gear.

[0015] In an optional embodiment, the arc-shaped rack is offset from the straight rack in the radial direction of the transmission gear.

[0016] In an optional embodiment, the arc-shaped rack is located on the side of the transmission gear closest to the buffer telescopic cylinder.

[0017] In an optional embodiment, the tricycle air suspension mechanism further includes a support wheel rotatably mounted on the rear axle, and the rack contacts the wheel surface of the support wheel.

[0018] In an optional embodiment, the tricycle air suspension mechanism further includes two paired limiting plates, the transmission gear being located between the two limiting plates and rotatably connected to both limiting plates; and the rack passing through the two limiting plates.

[0019] Secondly, this utility model provides a tricycle, the tricycle comprising:

[0020] The wheels and the air suspension mechanism of the three-wheeled vehicle as described in any of the foregoing embodiments, wherein the wheels are mounted at the end of the rear axle.

[0021] The beneficial effects of this utility model embodiment include, for example:

[0022] In summary, the tricycle air suspension mechanism provided in this embodiment includes a buffer telescopic cylinder and a transmission assembly between the frame and the rear axle. During tricycle operation, when encountering bumpy roads, the swing arm, along with the rear axle and wheels, swings close to the frame. The movement of the rear axle is transmitted to the buffer telescopic cylinder via the transmission assembly, causing relative movement between the cylinder body and piston rod. The high-pressure gas within the cylinder absorbs the vibration, achieving a buffering and shock-absorbing effect, thus improving comfort. The use of compressed air through relative sliding between the piston rod and cylinder body for shock absorption ensures stable and reliable relative movement, reducing the risk of breakage or failure, ensuring safe operation, and extending service life. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the air suspension unit in this embodiment;

[0025] Figure 2 This is a schematic diagram of the transmission assembly in this embodiment;

[0026] Figure 3 This is a schematic diagram of the buffer telescopic rod in this embodiment;

[0027] Figure 4 This is a schematic diagram from a first-view perspective of the air suspension mechanism of the tricycle in this embodiment;

[0028] Figure 5 This is a schematic diagram from a second perspective of the air suspension mechanism of the tricycle in this embodiment;

[0029] Figure 6 This is a schematic diagram from a third-person perspective of the air suspension mechanism of the tricycle in this embodiment;

[0030] Figure 7 This is a schematic diagram of a modified example of the air suspension mechanism for a three-wheeled vehicle according to this embodiment.

[0031] icon:

[0032] 001-Air suspension mechanism for tricycle; 002-Rear wheel; 003-Preset axle; 100-Frame; 110-Body; 120-Connecting shaft; 130-Connecting pipe; 140-Connecting rod; 200-Rear axle; 300-Air suspension unit; 310-Swing arm; 320-Buffer telescopic cylinder; 321-Cylinder body; 322-Piston rod; 323-Rod chamber; 324-Rodless chamber; 330-Transmission assembly; 331-Arc rack; 332-Transmission gear; 333-Straight rack; 340-Support wheel; 350-Limiting plate; 360-Chain; 370-Sprocket. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0037] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0038] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0039] In existing technology, the shock absorption mechanism of tricycles generally uses springs, which utilize the elastic force generated by the expansion and contraction of the springs to absorb energy and dampen shocks, thereby improving riding comfort. However, because the springs are repeatedly compressed and stretched under external forces, they are prone to breakage, leading to shock absorption failure and posing a safety hazard; in addition, maintenance costs are high.

[0040] In view of this, the designers have provided a tricycle air suspension mechanism 001 and a tricycle that can extend the service life of the shock absorption mechanism, reduce safety hazards, improve comfort, and reduce maintenance costs.

[0041] Please refer to Figures 1-6 This embodiment provides a three-wheeled vehicle air suspension mechanism 001, including a frame 100, a rear axle 200, a swing arm 310, a buffer telescopic cylinder 320, and a transmission assembly 330, wherein:

[0042] One end of the swing arm 310 is connected to the rear axle 200, and the other end of the swing arm 310 is rotatably mounted on the frame 100 around a preset axis 003; both ends of the rear axle 200 are used to mount wheels.

[0043] The buffer telescopic cylinder 320 includes a cylinder body 321 and a piston rod 322. The piston rod 322 is slidably engaged with the cylinder body 321. One of the cylinder body 321 and the piston rod 322 is rotatably connected to the frame 100, and the other is connected to the rear axle 200 through a transmission assembly 330.

[0044] As described above, the working principle of the tricycle air suspension mechanism 001 in this embodiment is as follows:

[0045] Two rear wheels 002 are installed at both ends of the rear axle 200, working together with a front wheel to support the tricycle. When the tricycle encounters bumpy roads, the rear wheels 002 transmit external force to the rear axle 200 and the swing arm 310, causing them to swing together around a preset axis 003 towards the frame 100. The movement of the rear axle 200 is transmitted to the buffer telescopic cylinder 320 via the transmission assembly 330, causing relative movement between the cylinder body 321 and the piston rod 322. The high-pressure gas inside the cylinder body 321 absorbs the vibration, achieving a cushioning and shock absorption effect, improving comfort. The shock absorption is achieved by using compressed air through the relative sliding of the piston rod 322 and the cylinder body 321. The relative movement of the piston rod 322 and the cylinder body 321 is stable and reliable, not easily broken or damaged, not prone to failure, safe to use, and has a long service life.

[0046] It should be understood that, with Figure 6Taking the perspective of the paper as an example, point O is the location of the preset axis 003, that is, the preset axis 003 is perpendicular to the paper. The extension direction of the preset axis 003 can be understood as a point. The swing arm 310, the rear axle 200 and the rear wheel 002 swing together around the preset axis 003. The trajectory L of the swing is located on the circumference with point O as the circle.

[0047] The following embodiments illustrate the detailed structure of the tricycle of this application by way of example.

[0048] Please refer to Figures 1-6 In this embodiment, optionally, the tricycle includes a tricycle air suspension mechanism 001, a front wheel (not shown) and two rear wheels 002.

[0049] Optionally, the tricycle air suspension mechanism 001 includes a frame 100, a rear axle 200, and two air suspension units 300. Both air suspension units 300 are mounted between the frame 100 and the rear axle 200, and are spaced apart axially along the rear axle 200. The cooperation of the two air suspension units 300 improves shock absorption and cushioning.

[0050] The frame 100 can be configured as a metal frame structure, which has high structural strength, is not easily damaged, and has a long service life. For example, the frame 100 can be configured as a rectangular metal frame with rectangular weight-reducing holes.

[0051] Please refer to Figure 2 Meanwhile, the frame 100 includes a body 110, two connecting shafts 120, and two connecting tubes 130. The body 110 has a rectangular frame structure. The two connecting shafts 120 and the two connecting tubes 130 are respectively matched one-to-one. The connecting shaft 120 is fixed to the bottom of the body 110, and the connecting tube 130 is sleeved on the corresponding connecting shaft 120. The connecting tube 130 and the corresponding connecting shaft 120 are rotatably matched around the axis of the connecting shaft 120. After the two connecting shafts 120 are installed, the two connecting shafts 120 are coaxially arranged, and the axis of the connecting shaft 120 is the preset axis 003.

[0052] Optionally, the two air suspension units 300 may have identical structural designs to facilitate manufacturing and reduce manufacturing costs. In this embodiment, to avoid repetition, the detailed structure of one air suspension unit 300 is used as an example. Furthermore, the two air suspension units 300 are respectively assembled with two connecting pipes 130.

[0053] Please refer to Figures 1-3The air suspension unit 300 includes a swing arm 310, a buffer telescopic cylinder 320, a transmission assembly 330, a support wheel 340, and two limiting plates 350. One end of the swing arm 310 is connected to a corresponding connecting pipe 130, and the other end is connected to the rear axle 200. Thus, the swing arm 310 and the rear axle 200 can swing together around a preset axis 003. One end of the buffer telescopic cylinder 320 is mounted on the connecting pipe 130, and the other end is connected to the rear axle 200 via the transmission assembly 330. The transmission assembly 330 is mounted on both the vehicle's undercarriage and the rear axle 200. The two limiting plates 350 are mounted on the rear axle 200, and the support wheel 340 is mounted between the two limiting plates 350. The support wheel 340 and the limiting plates 350 support and stabilize the transmission assembly 330, making its movement more stable and improving safety.

[0054] Please refer to Figure 3 Optionally, the buffer telescopic cylinder 320 includes a cylinder body 321, a piston rod 322, and a valve. The piston rod 322 is slidably installed inside the cylinder body 321. The piston and cylinder body 321 cooperate to form independent rod chamber 323 and rodless chamber 324 within the cylinder body 321. The rod chamber 323 is a sealed chamber containing high-pressure gas. The rodless chamber 324 is open to the outside. For example, an interconnection hole can be provided on the cylinder body 321, and a filter can be installed in the interconnection hole to connect the rodless chamber 324 to the outside, that is, outside gas can enter and exit the rodless chamber 324. At the same time, a valve is installed on the cylinder body 321 and communicates with the rod chamber 323. The valve can be set as an air valve. The air pressure in the rod chamber 323 can be adjusted by the valve, thereby adjusting the sensitivity of the buffer shock absorption. The comfort level can be adjusted by changing the stroke of the piston rod 322, making it flexible in use and widely applicable. It should be understood that when inflating the rod chamber 323, an air compressor can be connected to the valve, and after the valve is opened, the air compressor can be used to inject high-pressure gas into the rod chamber 323.

[0055] It should be understood that in some embodiments, in order to know the pressure inside the rod chamber 323, a pressure gauge can be installed on the cylinder 321, and the pressure can be intuitively obtained by the value displayed by the pressure gauge, which is beneficial for the pressure adjustment inside the rod chamber 323.

[0056] During assembly, one end of the cylinder body 321 is fixed to the connecting pipe 130, and one end of the piston rod 322 is connected to the transmission assembly 330. Obviously, in some embodiments, one end of the piston rod 322 can be fixed to the connecting pipe 130, and correspondingly, the cylinder body 321 is connected to the transmission assembly 330.

[0057] Please refer to Figure 2Optionally, the transmission assembly 330 includes an arc-shaped rack 331, a transmission gear 332, and a straight rack 333. The outer surface of the arc-shaped rack 331 is set as an arc surface, and the axis of the cylinder containing the arc surface coincides with the preset axis 003. The teeth of the arc-shaped rack 331 are located on the arc surface. One end of the arc-shaped rack 331 is fixed to the vehicle body, and the other end is suspended. The transmission gear 332 is rotatably mounted between two limiting plates 350. One end of the straight rack 333 is fixed to the piston rod 322, and the other end is suspended. The straight rack 333 passes between the two limiting plates 350, and the support wheel 340 is located below the straight rack 333, bearing and supporting the straight rack 333. The teeth of the arc-shaped rack 331 and the straight rack 333 both mesh with the transmission gear 332. The arc-shaped rack 331 is located on the side of the transmission gear 332 near the buffer telescopic cylinder 320, while the straight rack 333 is located below the transmission gear 332. At the same time, the arc-shaped rack 331 and the straight rack 333 are offset radially from each other on the transmission gear 332.

[0058] Please combine Figure 6 When the tricycle experiences bumps during operation, the swing arm 310, along with the rear axle 200, swings upwards towards the frame 100. The transmission gear 332 swings upwards, meshing with the arc-shaped rack 331. The transmission gear 332 rotates, causing the rack 333 to slide to the right, reducing the volume of the rod cavity 323 and utilizing high-pressure gas for shock absorption. Since the rack 333 is supported by the support wheel 340, the support wheel 340 can rotate when the rack 333 slides, reducing friction and wear. Simultaneously, the rack 333 is located between two limiting plates 350, which work together to restrict the axial position of the rack 333 on the transmission gear 332, preventing the rack 333 from disengaging from the transmission gear 332.

[0059] Meanwhile, since the arc-shaped rack 331 and the straight rack 333 are offset radially from the transmission gear 332—that is, with the radial perspective of the transmission gear 332 as a reference—the arc-shaped rack 331 and the straight rack 333 are offset. In other words, the side of the arc-shaped rack 331 near the straight rack 333 and the side of the straight rack 333 near the arc-shaped rack 331 have a distance greater than or equal to zero in the axial direction of the transmission gear 332. Thus, when the transmission gear 332 and the straight rack 333 swing upward together, the distance between the arc-shaped rack 331 and the straight rack 333 decreases, and the arc-shaped rack 331 and the straight rack 333 will not collide or interfere. By placing the arc-shaped rack 331 inside the transmission gear 332, the overall structural compactness is improved.

[0060] Please combine Figure 7In other embodiments, optionally, the transmission assembly 330 includes a chain 360 and a sprocket 370. One end of the chain 360 is connected to the piston rod 322 of the buffer telescopic cylinder 320, and the other end of the chain 360 is fixed to the frame 100. Specifically, a connecting rod 140 is provided at the bottom of the frame 100, and the other end of the chain 360 is fixed to the end of the connecting rod 140. The sprocket 370 is rotatably mounted on the rear axle 200, and the chain 360 meshes with the sprocket 370. When a bump occurs, the swing arm 310 drives the rear axle 200 and the sprocket 370 to swing relative to the frame 100. The chain 360 and the sprocket 370 move relative to each other, and the external force on the chain 360 can be transmitted to the piston rod 322, thereby adjusting the position of the piston rod 322 relative to the cylinder 321 to achieve buffering.

[0061] The tricycle provided in this embodiment uses two buffer telescopic cylinders 320 to work together to achieve a shock absorption and buffering effect by using compressed high-pressure gas. The shock absorption and buffering effect is good, it is not easy to break or fail, it is stable and reliable in operation, and has a long service life.

[0062] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An air suspension mechanism for a tricycle, characterized in that, Includes a frame (100), a rear axle (200), a control arm (310), a shock absorber cylinder (320), and a transmission assembly (330), wherein: One end of the swing arm (310) is connected to the rear axle (200), and the other end of the swing arm (310) is rotatably mounted on the frame (100) around a preset axis (003); the two ends of the rear axle (200) are used to mount wheels; The buffer telescopic cylinder (320) includes a cylinder body (321) and a piston rod (322). The piston rod (322) is slidably engaged with the cylinder body (321). One of the cylinder body (321) and the piston rod (322) is rotatably connected to the vehicle frame (100), and the other is connected to the rear axle (200) through the transmission assembly (330).

2. The tricycle air suspension mechanism according to claim 1, characterized in that: The frame (100) includes a body (110), a connecting shaft (120), and a connecting tube (130). The connecting shaft (120) is fixed to the body (110), and the axis of the connecting shaft (120) coincides with the preset axis (003). The connecting tube (130) is rotatably mounted on the connecting shaft (120). One end of the swing arm (310) is mounted on the connecting tube (130). One of the cylinder (321) and the piston rod (322) is connected to the connecting tube (130).

3. The tricycle air suspension mechanism according to claim 1, characterized in that: The cylinder (321) and the piston rod (322) together define a rod chamber (323) and a rodless chamber (324). The rod chamber (323) is used to store high-pressure gas, and the rodless chamber (324) is in communication with the outside. When the swing arm (310) drives the rear axle (200) to swing close to the frame (100), the piston rod (322) and the cylinder (321) move under the drive of the transmission assembly (330) so that the volume of the rod chamber (323) tends to decrease.

4. The tricycle air suspension mechanism according to claim 3, characterized in that: The buffer telescopic cylinder (320) also includes a valve, which is installed on the cylinder body (321) and communicates with the rod chamber (323).

5. The tricycle air suspension mechanism according to claim 1, characterized in that: The transmission assembly (330) includes an arc-shaped rack (331), a transmission gear (332), and a straight rack (333); one end of the arc-shaped rack (331) is mounted on the frame (100), and the other end is suspended; the transmission gear (332) is rotatably mounted on the rear axle (200); one end of the straight rack (333) is connected to the cylinder (321) or the piston rod (322), and the other end is suspended; The arc-shaped rack (331) has an arc-shaped surface, and the axis of the cylinder on which the arc-shaped surface is located coincides with the preset axis (003); the teeth of the arc-shaped rack (331) are provided on the arc-shaped surface; the teeth and the straight rack (333) both mesh with the transmission gear (332).

6. The tricycle air suspension mechanism according to claim 5, characterized in that: The arc-shaped rack (331) and the straight rack (333) are offset radially from each other in the transmission gear (332).

7. The tricycle air suspension mechanism according to claim 5, characterized in that: The arc-shaped rack (331) is located on the side of the transmission gear (332) near the buffer telescopic cylinder (320).

8. The tricycle air suspension mechanism according to any one of claims 5-7, characterized in that: The tricycle air suspension mechanism also includes a support wheel (340), which is rotatably mounted on the rear axle (200), and the rack (333) contacts the wheel surface of the support wheel (340).

9. The tricycle air suspension mechanism according to any one of claims 5-7, characterized in that: The tricycle air suspension mechanism also includes two paired limiting plates (350), the transmission gear (332) is located between the two limiting plates (350) and is rotatably connected to both limiting plates (350); the rack (333) passes between the two limiting plates (350).

10. A tricycle characterized in that, The tricycle includes: The wheels and the air suspension mechanism for the tricycle according to any one of claims 1-9, wherein the wheels are mounted at the end of the rear axle (200).

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