A stroller with shock absorbing function

Abstract

The utility model relates to a cart with shock -proof function, including frame and wheel, the frame both sides are hinged with swing lever, the swing lever can swing up and down, the head end of swing lever is connected with wheel mounting shaft, be equipped with the wheel on wheel mounting shaft, the head end of swing lever is equipped with a hook, the hook will hang on the hook position on the frame when the head end of swing lever is at the lowermost limit, still be equipped with a spring shock absorber between swing lever and frame, two opposite movable ends of spring shock absorber are hinged on the frame and swing lever respectively, the utility model has the advantages of: when cart passes uneven road surface such as protruding, swing setting swing lever can swing flexibly, and cooperate the expansion of spring shock absorber, can rapidly convert the vibration energy into the elastic potential energy of spring, and then gradually release, thereby significantly reduce the jolt degree of cart, make the driving more stable.

Description

Technical Field

[0001] This utility model relates to a multi-purpose trolley, and more particularly to an improvement in the shock absorption function of a multi-purpose trolley. Background Technology

[0002] Chinese utility model patent CN207917066U, entitled "A Foldable Trailer" (application number: CN201820241378.4), discloses a structure that includes a frame and wheels mounted on the frame, a detachable trailer connecting rod at the front of the frame, and a push rod at the rear of the frame.

[0003] This type of trailer uses an older type of spring suspension. The spring stiffness of older vertical spring suspensions is usually fixed, making it difficult to adaptively adjust to different loads and road conditions. When the trailer is lightly loaded, the springs may be too stiff, resulting in poor damping. Road bumps will be directly transmitted to the trailer, causing significant vibration to the cargo and potentially damaging it. Conversely, when heavily loaded, the springs may be over-compressed, losing elasticity and failing to effectively cushion vibrations. This also affects the trailer's ride stability. Furthermore, the vertical spring damping mechanism requires a significant height difference between the wheels and the frame, affecting the trailer's center of gravity and reducing cornering stability. Utility Model Content

[0004] In order to overcome the shortcomings of current strollers, such as limited shock absorption and high center of gravity, this utility model provides a stroller with shock absorption function.

[0005] The technical solution of this utility model to solve its technical problem is: a trolley with shock absorption function, including a frame and wheels, with swing rods hinged to both sides of the frame, the swing rods being able to swing up and down, the head end of the swing rods being connected to a wheel mounting axle, and a wheel being mounted on the wheel mounting axle; a hook is provided at the head end of the swing rods; the hook will be hooked on a hanging position on the frame when the head end of the swing rods is at its lowest limit; a spring shock absorber is also provided between the swing rods and the frame, and the two relatively movable ends of the spring shock absorber are respectively hinged to the frame and the swing rods.

[0006] In one preferred embodiment, the frame includes a base plate and a frame that supports the base plate, with the mounting points located on the side bars on the left and right sides of the frame.

[0007] To increase structural strength, mounting plates are provided on both sides of the frame, and the connection points of the spring shock absorber and the swing arm are located on the mounting plates.

[0008] The wheel structure is optimized, and a stopping device is installed on the frame. This device includes a brake cable leading to the wheels at both ends of the frame, a disc, a brake assembly, and a brake lever. The brake cable includes an outer tube and an inner cable. A brake lever is located on the frame, and one end of the brake cable is connected to the lever. The other end of the brake cable is connected to a brake assembly. The brake assembly has a locking pin that can extend or retract under the control of the brake cable. The brake assembly is mounted on a swing arm, and the disc is fixed to the wheel. Locking holes circumferentially arranged on the disc align with the locking pin of the brake assembly, allowing the locking pin to extend and insert into the locking holes. The brake assembly uses the brake assembly of our company's patent model CN202022124977.8 or a later reinforced version.

[0009] In a preferred embodiment, the locking holes on the disc are provided in two rings.

[0010] In a preferred embodiment, the brake cable is located at the bottom of the vehicle frame.

[0011] For ease of operation, the brake lever is a foot-operated brake lever; when the brake lever is pressed, the inner wire of the brake cable is pulled.

[0012] To facilitate the installation of the brake assembly, the swing arm is provided with several slots, and the brake assembly is installed in the slot at the very front.

[0013] In a preferred embodiment, the wheel has a hub at its center, which is rotatably mounted on the wheel mounting shaft, and the perforated plate is fixed inside the hub.

[0014] In a preferred embodiment, the spring damper is an external spring damper.

[0015] Furthermore, the middle part of the swing rod is provided with a connecting lug that is hinged to the spring shock absorber, and the hinge point between the frame and the swing rod is at the tail end of the swing rod.

[0016] The present invention also includes the following additional technical features: the front end of the frame is provided with a front wheel and a detachable traction connecting rod, and the rear end of the frame is provided with a handle for easy pushing.

[0017] When this utility model is in use, the wheel load is on the swing arm when the vehicle is in motion. The middle of the swing arm is damped by the spring shock absorber. The swing amplitude of the swing arm is at the upper part of the side arm. Under normal conditions, the hook is attached to the hanging position on the side arm. When the wheel receives a severe impact, the swing arm will tilt upwards, compressing the spring shock absorber to absorb energy and dampen the shock. Then, under the action of the damping mechanism of the spring shock absorber, it slowly returns to its original position, thus playing a good role in shock absorption and buffering.

[0018] In addition, the brake assembly of the stopping device is mounted on the swing arm and has a follow-up positioning function. When the brake lever is pressed, it can be inserted into the locking hole on the disc to stop the wheel.

[0019] The beneficial effects of this utility model are as follows: 1. The spring shock absorber can effectively absorb and buffer the vibration and impact force generated by uneven road surfaces during the trolley's movement. When the trolley passes over uneven road surfaces such as bumps, the swing arm can swing flexibly, and in conjunction with the extension and contraction of the spring shock absorber, it can quickly convert the vibration energy into the elastic potential energy of the spring, and then gradually release it, thereby significantly reducing the trolley's bumpiness and making the ride more stable. This improves the stability of the people or loads inside the trolley, reduces the risk of damage to vehicle parts due to vibration, and extends the trolley's service life. 2. The brake structure using the needle-type stop device is simple and reasonable, reduces the number of parts, lowers the cost, and is reliable in use, enabling it to remain in a braking state or a free-moving state for a long time. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of one embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of one embodiment of the present invention after the wheels have been removed.

[0022] Figure 3 This is an enlarged schematic diagram of a wheel according to an embodiment of this utility model.

[0023] Figure 4 This is a schematic diagram of an embodiment of the present invention where the shock absorption function is not activated.

[0024] Figure 5 This is a schematic diagram of the shock absorption function being activated according to one embodiment of this utility model.

[0025] Figure 6 This is a perspective view of a stop device according to an embodiment of the present invention.

[0026] Figure 7 This is a schematic diagram of a brake assembly according to an embodiment of the present invention. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] Example 1 Combined with appendix Figures 1 to 7A trolley with shock absorption function includes a frame 1 and wheels 2. A swing rod 3 is hinged to both sides of the frame 1. The swing rod 3 can swing up and down. The head end of the swing rod 3 is connected to a wheel mounting axle 4, and a wheel 2 is mounted on the wheel mounting axle 4. A hook 5 is provided at the head end of the swing rod 3. When the head end of the swing rod 3 is at its lowest limit, the hook 5 will be hooked on the hanging position 6 on the frame 1. A spring shock absorber 7 is also provided between the swing rod 3 and the frame 1. The two relatively movable ends of the spring shock absorber 7 are respectively hinged to the frame 1 and the swing rod 3.

[0029] In one preferred embodiment, the frame 1 includes a base plate 8 and a frame 9 that supports the base plate 8, and the mounting positions 6 are located on the side bars 10 on the left and right sides of the frame 9.

[0030] To increase structural strength, mounting plates 11 are provided on both sides of the frame 1, and the connection parts of the spring shock absorber 7 and the swing rod 3 are located on the mounting plates 11.

[0031] The structure of the wheel 2 is optimized. A stopping device 12 is also installed on the frame 1. The stopping device 12 includes a brake cable 13 leading to the wheels 2 at both ends of the frame 1, a disc 14, a brake assembly 15, and a brake lever 16. The brake cable 13 includes an outer tube 17 and an inner cable 18. A brake lever 16 is provided on the frame 1, and one end of the brake cable is connected to the brake lever 16. The other end of the brake cable 13 is connected to a brake assembly 15. The brake assembly 15 has a locking pin 19 that can extend or retract under the control of the brake cable 13. The brake assembly 15 is mounted on the swing arm 3. The disc 14 is fixed to the wheel 2, and the locking holes 20 circumferentially arranged on the disc 14 face the locking pin 19 of the brake assembly 15, so that the locking pin 19 can extend and be inserted into the locking holes 20. The brake assembly 15 adopts the brake assembly 15 of our company's patent model CN202022124977.8 or a later reinforced version.

[0032] In a preferred embodiment, the locking holes 20 on the hole plate 14 are provided in two rings.

[0033] In a preferred embodiment, the brake line 13 is located at the bottom of the frame 1.

[0034] For ease of operation, the brake lever 16 is a foot-operated brake lever 16. When the brake lever 16 is pressed, it pulls the inner wire 18 of the brake cable 13.

[0035] To facilitate the installation of the brake assembly 15, the swing arm 3 is provided with several slots 21, and the brake assembly 15 is installed in the slot 21 at the very front.

[0036] In a preferred embodiment, the wheel 2 has a hub 22 in the middle, which is rotatably mounted on the wheel mounting shaft 4, and the perforated plate 14 is fixed inside the hub 22.

[0037] In a preferred embodiment, the spring damper 7 is an external spring damper 7.

[0038] Furthermore, the middle part of the swing rod 3 is provided with a connecting ear 23 which is hinged to the spring shock absorber 7, and the hinge point between the frame 1 and the swing rod 3 is at the tail end of the swing rod 3.

[0039] The present invention also includes the following additional technical features: the front end of the frame 1 is provided with a front wheel 24 and a detachable traction connecting rod 25, and the rear end of the frame 1 is provided with a handle 26 for easy pushing.

[0040] In this embodiment, when the vehicle is in motion, the wheel 2 is loaded on the swing arm 3. The middle part of the swing arm 3 is damped by the spring damper 7. The swing amplitude of the swing arm 3 is at the upper part of the side arm 10. Under normal conditions, the hook 5 is hung on the hanging position 6 of the side arm 10. When the wheel 2 receives a severe impact, the swing arm 3 will tilt upwards, compressing the spring of the spring damper 7 to absorb energy and dampen the shock. Then, under the action of the damping mechanism of the spring damper 7, it slowly returns to its original position, thereby playing a good role in shock absorption and buffering.

[0041] In addition, the brake assembly 15 of the stopping device 12 is mounted on the swing arm 3 and has a follow-up positioning function. When the brake lever 16 is pressed, it can be inserted into the locking hole 20 on the hole plate 14 to stop the wheel 2.

[0042] The beneficial effects of this utility model are as follows: 1. The spring shock absorber can effectively absorb and buffer the vibration and impact force generated by uneven road surfaces during the trolley's movement. When the trolley passes over uneven road surfaces such as bumps, the swing arm can swing flexibly, and in conjunction with the extension and contraction of the spring shock absorber, it can quickly convert the vibration energy into the elastic potential energy of the spring, and then gradually release it, thereby significantly reducing the trolley's bumpiness and making the ride more stable. This improves the stability of the people or loads inside the trolley, reduces the risk of damage to vehicle parts due to vibration, and extends the trolley's service life. 2. The brake structure using the needle-type stop device is simple and reasonable, reduces the number of parts, lowers the cost, and is reliable in use, enabling it to remain in a braking state or a free-moving state for a long time.

Claims

1. A stroller with shock absorption function, comprising a frame and wheels, characterized in that: The frame has swing arms hinged to both sides, which can swing up and down. The head of the swing arm is connected to a wheel mounting axle, and a wheel is mounted on the wheel mounting axle. The head of the swing arm is provided with a hook. When the head of the swing arm is at its lowest limit, the hook will be hooked on a mounting position on the frame. A spring shock absorber is also provided between the swing arm and the frame. The two opposite movable ends of the spring shock absorber are respectively hinged to the frame and the swing arm.

2. The stroller with shock absorption function according to claim 1, characterized in that: The frame includes a base plate and a frame that supports the base plate, and the mounting points are located on the side bars on the left and right sides of the frame.

3. The stroller with shock absorption function according to claim 1, characterized in that: Mounting plates are provided on both sides of the frame, and the connection parts of the spring shock absorber and the swing arm are located on the mounting plates.

4. The stroller with shock absorption function according to claim 1, characterized in that: The frame is also equipped with a braking device, which includes a brake cable leading to the wheels at both ends of the frame, a disc, a brake assembly, and a brake lever. The brake cable includes an outer tube and an inner cable. The frame has a brake lever, and one end of the brake cable is connected to the brake lever. The other end of the brake cable is connected to a brake assembly, which has a locking pin that can extend or retract under the control of the brake cable. The brake assembly is mounted on a swing arm, and the disc is fixed to the wheel. The locking holes on the disc are aligned with the locking pin of the brake assembly, so that the locking pin can extend and be inserted into the locking holes.

5. The stroller with shock absorption function according to claim 4, characterized in that: The brake cable is located at the bottom of the frame.

6. The stroller with shock absorption function according to claim 4, characterized in that: The brake lever is a foot-operated brake lever; when the brake lever is pressed, the inner cable of the brake cable is pulled.

7. The stroller with shock absorption function according to claim 4, characterized in that: The swing arm has several slots, and the brake assembly is installed in the slot at the very front.

8. The stroller with shock absorption function according to claim 4, characterized in that: The wheel has a hub in the middle, which is rotatably mounted on the wheel mounting shaft, and the perforated plate is fixed inside the hub.

9. The stroller with shock absorption function according to claim 1, characterized in that: The spring damper is an external spring damper.

10. The stroller with shock absorption function according to claim 1, characterized in that: The swing arm has a connecting lug in the middle that is hinged to the spring shock absorber, and the hinge point between the frame and the swing arm is at the tail end of the swing arm.

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