A delayed release foot brake assembly

Abstract

The application discloses a delay-release foot brake assembly. The foot brake is installed on a frame in a lifting manner, and is composed of a second delay-return element and a brake block installed on the second delay-return element. The second delay-return element always presses the brake block downward, and the return speed of the second delay-return element is faster than that of the first delay-return element. The first delay-return element is installed on the frame. A linkage mechanism is installed between the foot brake and the first delay-return element. One end of the linkage mechanism is connected to the foot brake, and the other end of the linkage mechanism is connected to the movable end of the first delay-return element. When the foot brake is stepped on, the frame is positioned, and the first delay-return element stores energy. When the foot brake is released, the energy stored by the first delay-return element is released in a delayed manner, and the foot brake is released through the linkage mechanism. When the application is used, the user can leave the foot after stepping on the foot brake, but the function of the foot brake can still be maintained in a delayed manner, so that the vehicle is convenient to store.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of parking racks, and particularly relates to a delayed release foot brake assembly. BACKGROUND

[0002] It is known that the parking rack of two-wheeled vehicles is mainly used for parking bicycles or simple electric vehicles, can provide more parking spaces, maximizes the use of space, and makes the parking of vehicles convenient and simple, and changes the past phenomenon of random parking of bicycles, motorcycles and electric vehicles. In the prior art, the parking rack of two-wheeled vehicles is roughly divided into horizontal moving type and up-down lifting type.

[0003] Among them, the horizontal moving type parking rack of two-wheeled vehicles is mainly composed of a track and a frame, the track is laid on the ground or a corresponding platform, the frame provides a space for parking vehicles, and the frame is arranged on the track in a horizontally sliding manner. Generally, the frame of the horizontal moving type parking rack of two-wheeled vehicles is arranged on the track in a form of 10°, 15°, 30° or 45°. When the two-wheeled vehicle is stored, the frame will be passively moved due to the angle, causing inconvenience for the user to store the two-wheeled vehicle.

[0004] In order to avoid the inconvenience of storing vehicles, the existing horizontal moving type parking rack of two-wheeled vehicles generally adopts the following two solutions:

[0005] One is to adopt a foot brake, that is, to install a foot brake on the frame, and to position the frame by the foot brake. When using this structure, the foot brake must be stepped on at all times to store the vehicle. When the foot is removed from the brake, the brake is disabled, and the actual operation is not very convenient.

[0006] The second is to adopt a linkage brake, that is, to install a brake and a front wheel tire pedal on the frame, and to provide a linkage brake release mechanism between the front wheel tire pedal and the brake. When using, the brake is first stepped down, at this time, the front casters of the frame are off the ground, so that the frame cannot move temporarily. The user parks the two-wheeled vehicle on the frame, and after the front wheel passes through the front wheel tire pedal, the linkage brake release mechanism is triggered, and the linkage brake function is released. This way can indeed solve the problem of sliding when parking. However, the manufacturing cost is high. If a user accidentally or maliciously steps on the linkage brake, but does not store the two-wheeled vehicle, the brake cannot be released, causing the rack to be immovable, so that other racks cannot move horizontally, and the use of the entire parking rack will be difficult.

[0007] Therefore, the present application person specially designs a brake assembly which can be delayed to release, so as to facilitate the parking of vehicles and avoid affecting the subsequent parking. SUMMARY

[0008] The application aims to provide a delay release foot brake assembly, which can keep the foot brake function for a long time after the user steps on the foot brake, and is convenient for vehicle storage.

[0009] In order to achieve the above-mentioned purpose, the solution of the application is:

[0010] A delay release foot brake assembly, which comprises a foot brake, a linkage mechanism and a first delay reset element; the foot brake is installed on a vehicle frame in a lifting manner, and the foot brake is composed of a second delay reset element and a brake block installed on the second delay reset element; the second delay reset element always presses the brake block downward, and the reset speed of the second delay reset element is faster than that of the first delay reset element; the first delay reset element is installed on the vehicle frame; the linkage mechanism is installed between the foot brake and the first delay reset element, one end of the linkage mechanism is connected to the foot brake, and the other end of the linkage mechanism is connected to the movable end of the first delay reset element; when the foot brake is stepped on, the second delay reset element presses the brake block downward to position the vehicle frame, and the foot brake drives the first delay reset element to store energy through the linkage mechanism; when the foot brake is released, the energy stored in the first delay reset element is released in a delayed manner to drive the foot brake to release the brake through the linkage mechanism.

[0011] The first delay reset element is a gas spring or a gas tension spring or a damper.

[0012] The linkage mechanism is a lever, or a folding lever, or a combination of a guide wheel and a pull rope.

[0013] The second delay reset element is a gas spring or a gas tension spring, and the brake block is installed on the outer end of the push rod of the gas spring or the outer end of the pull rod of the gas tension spring.

[0014] The second delay reset element is composed of a foot brake seat and a spring, the brake block is installed below the foot brake seat in a lifting manner, and the spring installed in the foot brake seat always presses the brake block downward.

[0015] The foot brake seat has a slot, the brake block has a plug rod, the plug rod is inserted into the slot, a limit structure is arranged between the plug rod and the slot, the brake block is installed below the foot brake seat, a spring is arranged between the top of the plug rod and the bottom of the slot, and the second delay reset element always presses the brake block downward by means of the spring.

[0016] The limit structure is that the opening of the slot is designed as a necked opening, and the top of the plug rod is designed as an anti-extraction head, the anti-extraction head is located in the slot, and the anti-extraction head cooperates with the necked opening to limit the plug rod from being extracted from the slot.

[0017] The spring is a compression spring or a torsion spring.

[0018] The linkage mechanism adopts a lever, the fulcrum of the lever is fixed on the frame, a sliding groove is provided on the lever corresponding to the fulcrum, and the lever is set on the frame by inserting the fulcrum into the sliding groove; one end of the lever is connected to the movable end of the first delayed reset element, and the other end of the lever is connected to the foot brake.

[0019] The linkage mechanism is a folding rod, the folding rod's kink point is pivoted to the frame so that the folding rod can rotate around the kink point; the second delayed reset element is a gas spring, the brake block is installed on the second delayed reset element through a swing arm, the brake block is fixed to one end of the swing arm, the other end of the swing arm is pivoted to the frame, one end of the second delayed reset element is pivoted to the swing arm and the other end is pivoted to one end of the folding rod; the first delayed reset element is a gas spring or a gas tension spring, the fixed end of the first delayed reset element is pivoted to the frame, and the movable end of the first delayed reset element is pivoted to the other end of the folding rod.

[0020] A foot pedal is provided at one end of the folding rod of the linkage mechanism which is pivotally connected to the second time-delay reset element.

[0021] After adopting the above scheme, when the present invention is used, the user steps on the foot brake with his foot and can leave the foot brake. At this time, the brake block always presses down on the ground (or the contact surface that can generate friction) under the action of the second delayed reset element and will not leave immediately. The brake block and the ground (or the contact surface that can generate friction) generate friction to position the frame, or further generate a height difference to lift the frame (the wheels are off the ground) to position the frame. Because of the delayed reset characteristic of the first delayed reset element, the foot brake temporarily maintains the braking function, and as time goes by, the first delayed reset element slowly resets, and then drives the foot brake to release the brake through the linkage mechanism. By selecting different delayed reset elements, the corresponding delay time can be set, so that the foot brake automatically leaves the ground (or the contact surface that can generate friction) at the corresponding time. During the delayed release period, the vehicle can be stored conveniently. After the brake is completely released, the horizontal movable frame can be automatically restored, and the operation is simpler. The overall structure of the present invention is simple, the manufacturing cost is low, and the user experience is improved.

[0022] The present invention is further described below with reference to the accompanying drawings and implementation examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for describing the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. Those skilled in the art can also derive other relevant drawings based on these drawings without inventive effort.

[0024] Figure 1 1 is a schematic diagram of the brake release state of the first embodiment of the present invention;

[0025] Figure 2 is a partial enlarged view of Figure 1 ;

[0026] Figure 3 is a brake state schematic diagram of the embodiment one of the present application;

[0027] Figure 4 is a partial enlarged view of Figure 3 ;

[0028] Figure 5 is a partial enlarged view of the unbraking state of the embodiment two of the present application;

[0029] Figure 6 is a partial enlarged view of the brake state of the embodiment two of the present application;

[0030] Figure 7 is a comparison diagram of the first time-delay reset element in the unbraking state of the embodiment one and three of the present application;

[0031] Figure 8 is a comparison diagram of the first time-delay reset element in the brake state of the embodiment one and three of the present application;

[0032] Figure 9 is a schematic diagram of the unbraking state of the embodiment four of the present application;

[0033] Figure 10 is a partial enlarged view of Figure 9 ;

[0034] Figure 11 is a schematic diagram of the brake state of the embodiment four of the present application;

[0035] Figure 12 is a partial enlarged view of Figure 11 ;

[0036] Figure 13 is a partial enlarged view of the unbraking state of the embodiment five of the present application;

[0037] Figure 14 is a partial enlarged view of the brake state of the embodiment five of the present application.

[0038] Explanation of reference numerals

[0039] foot brake 1, second time-delay reset element 10, foot brake seat 11, spring 12, brake block 13, insertion slot 14, necked mouth 141, insertion rod 15, anti-coming-off head 151, swing arm 16;

[0040] linkage mechanism 2, fulcrum 21, sliding groove 22, folding point 23, foot pedal 24;

[0041] first time-delay reset element 3, movable end 31;

[0042] Frame 4, wheels 41, risers 42;

[0043] Pivot points A, B, C. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0045] It should be noted that the terms up, down, left, right, inside, outside, first, second, etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the technical features indicated, unless otherwise clearly and specifically defined.

[0046] See also Figures 1 to 4 As shown, the first embodiment of the present invention discloses a delayed-release foot brake assembly, including a foot brake 1, a linkage mechanism 2 and a first delayed reset element 3.

[0047] The foot brake 1 is mounted on the vehicle frame 4 in a manner that allows it to be raised and lowered. When the foot brake 1 is lowered, it generates friction with the ground (or a contact surface that can generate friction) to achieve the purpose of braking. When the foot brake 1 is raised, it leaves the ground or the original contact surface to achieve the purpose of releasing the brake. The foot brake 1 is composed of a second delayed reset element 10 and a brake shoe 13 mounted on the second delayed reset element 10. The brake shoe 13 is used to contact the ground, etc. The second delayed reset element 10 always presses the brake shoe 13 downward. The second delayed reset element 10 plays the role of pressing the brake shoe 13, so that the brake shoe 13 maintains contact with the ground, etc., thereby generating friction. In this embodiment 1, the second delayed reset element 10 is composed of a foot brake seat 11 and a spring 12. The brake shoe 13 is mounted below the foot brake seat 11 in a manner that allows it to be raised and lowered. The spring 12 installed in the foot brake seat 11 always presses the brake shoe 13 downward. The spring 12 can specifically be a compression spring or a torsion spring, etc., as long as it can always press the brake shoe downward. The reset speed of the second time-delay reset element 10 (the reset speed of the first spring 12 in this embodiment) is faster than the reset speed of the first time-delay reset element 3 .

[0048] The first time-delay reset element 3 is installed on the frame 4. The first time-delay reset element 3 can be a gas spring, a gas tension spring or a damper. The embodiment one uses a gas spring, the push rod of the gas spring is always pushed out downward (outward) in the normal state, and the push rod of the gas spring is compressed upward (inward) and stores energy when braking. The gas tension spring (see embodiment five) can also be used, the pull rod of the gas tension spring is always pulled back downward (inward) in the normal state, and the pull rod of the gas tension spring is pulled out upward (outward) and stores energy when braking. The damper can also be used, and the principle is the same, which will not be repeated here.

[0049] The linkage mechanism 2 is installed between the foot brake 1 and the first time-delay reset element 3, one end of the linkage mechanism 2 is connected to the foot brake 1, and the other end of the linkage mechanism 2 is connected to the movable end 31 of the first time-delay reset element 3. The linkage mechanism 2 can be a lever, a folding rod, or a combination of guide wheels and pull ropes, and other forms can also be used as long as the linkage effect of the application can be achieved. In the embodiment one, the linkage mechanism 2 is a lever, the fulcrum 21 of the lever is fixed on the frame 4, a sliding groove 22 is provided on the lever corresponding to the fulcrum 21, and the lever is arranged on the frame 4 by inserting the fulcrum 21 into the sliding groove 22. The sliding groove 22 can ensure smooth linkage when the lever rotates. One end of the lever is connected to the movable end 31 of the first time-delay reset element 3, and the other end of the lever is connected to the foot brake 1.

[0050] Further, the optimized structure of the foot brake 1 in the embodiment one is that the foot brake seat 11 is connected to the other end of the lever of the linkage mechanism 2, the foot brake seat 11 has a slot 14, the brake block 13 has a plug rod 15, the plug rod 15 is inserted into the slot 14, so that the brake block 13 is installed below the foot brake seat 11, a limit structure is further provided between the plug rod 15 and the slot 14, so that the plug rod 15 cannot be pulled out of the slot 14, and a spring 12 is arranged between the top of the plug rod 15 and the bottom of the slot 14, which always presses the brake block downward by means of the spring 12. The limit structure can be as shown in the figure, but is not limited to the structure shown in the figure: the opening of the slot 14 is designed as a necked opening 141, the top of the plug rod 15 is designed as an anti-extraction head 151, the anti-extraction head 151 is located in the slot 14, and the anti-extraction head 151 cooperates with the necked opening 141 to limit the plug rod 15 from being pulled out of the slot 14.

[0051] In the initial state (unbraking) of the embodiment one, the first time-delay reset element 3 (gas spring) is in a natural state, the push rod is pushed out downward (outward) from the gas cylinder, and the movable end 31 of the first time-delay reset element 3 drives the linkage mechanism 2 (lever) to rotate around the fulcrum 21. At this time, the linkage mechanism 2 (lever) drives the foot brake 1 to rise and leave the ground, and the frame 4 can move by means of the wheels 41.

[0052] In use, the brake process: the user steps on the foot brake 1 (the foot brake 1 is lowered), and the foot can be away from the foot brake 1. At this time, the brake block 13 keeps in contact with the ground under the action of the spring 12 to produce friction, so that the frame 4 is positioned and cannot move through the wheels 41, achieving the purpose of braking. At the same time, the foot brake 1 drives the linkage mechanism 2 (lever) to rotate around the fulcrum 21, and the linkage mechanism 2 (lever) compresses the push rod of the gas spring upward (inward) through the movable end 31 to make the first delay reset element 3 store energy. Moreover, the brake block 13 is pressed more tightly to the ground under the action of the spring 12 and will not immediately leave, further ensuring the positioning of the frame 4 and facilitating the user to park the vehicle.

[0053] When the foot brake 1 is released, the linkage mechanism 2 will not rotate at a large angle within a certain time due to the delay reset characteristic of the first delay reset element 3. Under the action of the spring 12, the foot brake 1 temporarily maintains the braking function, further facilitating the user to park the vehicle. In the entire braking process, the user's foot only needs to step on the foot brake 1 once, without having to step on it all the time, and the operation is more convenient.

[0054] The brake release process: as time goes on, the energy stored in the first delay reset element 3 is released in delay, the delay reset element 3 slowly resets, and the push rod of the gas spring is pushed downward again, which drives the foot brake 1 upward through the linkage mechanism 2 to leave the ground, so that the frame 4 can move again through the wheels 41, achieving the purpose of brake release. In the entire brake release process, it is automatically and delayed completed by the delay reset element 3 cooperating with the linkage mechanism 2, avoiding the situation that the frame cannot move due to no brake release.

[0055] Embodiment two of the present application is shown in Figure 5 and Figure 6 The difference between embodiment one and embodiment two is that the second delay reset element 10 adopts a gas spring, and the brake block 13 is installed at the outer end of the push rod of the gas spring, that is, the gas spring replaces the foot brake seat 11 and the spring 12. In this embodiment two, the gas spring always presses the brake block 13 downward, plays a role in pressing the brake block 13, and makes the brake block 13 keep in contact with the ground, thereby producing friction. In this embodiment two, the reset speed of the gas spring is faster than that of the first delay reset element 3. Of course, the second delay reset element 10 can also adopt a gas tension spring, and the brake block 13 is installed at the outer end of the pull rod of the gas tension spring, which will not be shown and described herein.

[0056] The difference between embodiment three of the present application and embodiment one is that the first delay reset element 3 is reversely installed with the gas spring, that is, the gas spring body in embodiment one is fixed on the frame 4, and the push rod is the movable end 31, while in embodiment three, the push rod is fixed on the frame 4, and the gas spring body is the movable end 31, as shown in Figure 7 and Figure 8 The working principle is unchanged, and this will not be described herein.

[0057] If the first time-delay reset element 3 is an air spring, the air spring is installed on the frame 4, and the pull rod of the air spring is always pulled back into the cylinder in the normal state and is pulled out of the cylinder when subjected to external force. In this way, in the initial state (unbraking), the first time-delay reset element 3 (air spring) is in a natural state, the pull rod is pulled back downward (inward), and the movable end 31 of the first time-delay reset element 3 drives the linkage mechanism 2 (lever) to rotate about the fulcrum 21. At this time, the linkage mechanism 2 (lever) drives the foot brake 1 to move away from the ground.

[0058] In use, the braking process is as follows: the user steps on the foot brake 1 with the foot, and the foot can be removed from the foot brake 1. At this time, the brake block 13 is in contact with the ground to generate friction, so that the frame 4 is positioned, achieving the purpose of braking. At the same time, the foot brake 1 drives the linkage mechanism 2 (lever) to rotate, and the linkage mechanism 2 (lever) pulls the pull rod of the air spring upward (outward) through the movable end 31, so that the first time-delay reset element 3 stores energy. Within a certain time, the linkage mechanism 2 will not rotate by a large angle, and the brake block 13 is pressed more tightly against the ground under the action of the second time-delay reset element 10 and will not move away immediately. The foot brake 1 temporarily maintains the braking function to position the frame 4, facilitating the user to park the vehicle.

[0059] The unbraking process is as follows: with the passage of time, the stored energy of the first time-delay reset element 3 is released in a delayed manner, the first time-delay reset element 3 slowly resets, the pull rod of the air spring is pulled back downward again, the foot brake 1 is driven upward away from the ground by the linkage mechanism 2 in a delayed manner, and the unbraking purpose is achieved.

[0060] If a damper is used, the working principle is the same as that of the foregoing embodiments, and thus will not be described herein.

[0061] For example Figures 9 to 14 As shown in FIG. 4, in the fourth and fifth embodiments of the present application, the linkage mechanism 2 is a folding lever, the angle of the folding lever is determined according to actual conditions and is not limited by the drawing, and the folding point 23 of the folding lever is pivoted on the frame 4, so that the folding lever can rotate about the folding point 23. The second time-delay reset element 10 is an air spring, and the brake block 13 is installed on the second time-delay reset element 10 through a swing arm 16. Specifically, the brake block 13 is fixed to one end of the swing arm 16, the other end of the swing arm 16 is pivoted on the frame 4, one end of the second time-delay reset element 10 is pivoted on the swing arm 16, and the other end of the second time-delay reset element 10 is pivoted on one end of the folding lever (linkage mechanism 2). In this way, the second time-delay reset element 10 pushes and pulls the swing arm 16, so that the swing arm 16 swings and drives the brake block 13 downward to brake or upward to unbrake.

[0062] The first time delay reset element 3 is a gas spring or a gas spring, and the fixed end of the first time delay reset element 3 is pivoted on the frame 4, and the movable end of the first time delay reset element 3 is pivoted on the other end of the folding rod (linkage mechanism 2). Among them, the first time delay reset element 3 and the second time delay reset element 10 of the fourth embodiment are both gas springs, forming a double gas spring structure. The first time delay reset element 3 of the fifth embodiment is a gas spring, and the second time delay reset element 10 is a gas spring, forming a combination structure of a gas spring and a gas spring. In order to facilitate brake operation, the folding rod of the linkage mechanism 2 and the second time delay reset element 10 are pivoted at one end to form a foot pedal 24. Of course, the foot pedal 24 is not limited to the extension shown, but can also be a folding rod bent to form a foot pedal, or a foot pedal fixedly installed on the folding rod, or in other ways to increase the foot pedal.

[0063] In the fourth and fifth embodiments, the relative positions of the three pivot points do not move (the folding point 23 of the folding rod, the pivot point A of the frame 4, the other end of the swing arm 16, the pivot point B of the frame 4, and the fixed end of the first time delay reset element 3, the pivot point C of the frame 4), the three pivot points can be directly arranged on the frame 4, or indirectly arranged on the frame 4 by means of accessories (such as mounting plates, etc.). In order to facilitate installation, the fourth and fifth embodiments arrange the three pivot points on the vertical plate 42 of the frame 4.

[0064] In the initial state (unbraking), the first time delay reset element 3 (gas spring or gas spring) is in a natural state, and the movable end 31 of the first time delay reset element 3 drives the linkage mechanism 2 (folding rod) to rotate counterclockwise around the folding point 23, at this time, the linkage mechanism 2 (folding rod) drives the foot brake 1 to leave the ground.

[0065] In use, the brake process: the user steps on the foot brake 1 with his foot, and the foot can leave the foot brake 1, at this time, the second time delay reset element 10 pushes the swing arm 16 to swing clockwise, driving the brake block 13 to contact the ground to generate friction to position the frame 4, achieving the purpose of braking. At the same time, the foot brake 1 also rotates clockwise, and the linkage mechanism 2 (folding rod) acts on the gas spring or gas spring through the movable end 31, so that the first time delay reset element 3 stores energy. Within a certain time, the linkage mechanism 2 will not rotate by a large angle, and the brake block 13 will be pressed more tightly to the ground under the action of the second time delay reset element 10 and will not leave immediately, and the foot brake 1 temporarily maintains the brake function to position the frame 4, facilitating the user to park the vehicle.

[0066] The unbraking process: as time goes on, the energy stored in the first time delay reset element 3 is delayed and released, and the first time delay reset element 3 slowly resets, and the first time delay reset element 3 delays the driving of the foot brake 1 upward away from the ground through the linkage mechanism 2, achieving the purpose of unbraking.

[0067] The application can facilitate the storage of the vehicle in the time period of delaying the release of the brake, and can automatically restore the horizontal movement of the vehicle frame after the brake is completely released, so that the use and operation are more simple.

[0068] The above description is only an embodiment of the application, and is not a limitation on the protection scope of the application. It should be pointed out that those skilled in the art can make equivalent changes according to the design idea of the application after reading the specification, and the equivalent changes fall within the protection scope of the application.

Claims

1. A delayed-release foot brake assembly, characterized in that: The foot brake comprises a foot brake, a linkage mechanism, and a first delayed reset element; the foot brake is mounted on the vehicle frame in a manner that allows it to be raised and lowered, and the foot brake comprises a second delayed reset element and a brake shoe mounted on the second delayed reset element; the second delayed reset element always presses the brake shoe downward, and the reset speed of the second delayed reset element is faster than the reset speed of the first delayed reset element; The first delayed reset element is mounted on the frame; a linkage mechanism is mounted between the foot brake and the first delayed reset element, with one end of the linkage mechanism connected to the foot brake and the other end of the linkage mechanism connected to the movable end of the first delayed reset element; when the foot brake is depressed, the second delayed reset element presses the brake block downward to position the frame, while the foot brake drives the first delayed reset element to store energy through the linkage mechanism; when the foot brake is released, the stored energy of the first delayed reset element is released with a delay, and the foot brake is released with a delay through the linkage mechanism; The first time-delay reset element is a gas spring, a gas tension spring or a damper; The linkage mechanism is a lever, or a folding rod, or the linkage mechanism is a combination of a guide wheel and a pull rope.

2. A delayed-release foot brake assembly according to claim 1, characterized in that: The second time-delay reset element is a gas spring or a gas tension spring, and the brake block is mounted on the outer end of the push rod of the gas spring or the outer end of the pull rod of the gas tension spring.

3. The delayed-release foot brake assembly according to claim 1, wherein: The second time-delay reset element is composed of a foot brake seat and a spring. The brake block is installed below the foot brake seat in a liftable manner. The spring installed in the foot brake seat always presses the brake block downward.

4. A delayed-release foot brake assembly according to claim 3, characterized in that: The foot brake seat has a slot, and the brake shoe has an insertion rod, which is inserted into the slot. A limiting structure is provided between the insertion rod and the slot, so that the brake shoe can be installed below the foot brake seat. A spring is provided between the top of the insertion rod and the bottom of the slot, and the second delayed reset element uses the spring to always press the brake shoe downward.

5. A delayed-release foot brake assembly according to claim 4, characterized in that: The limiting structure is as follows: the opening of the slot is designed as a necked opening, the top of the insertion rod is designed as an anti-slip head, the anti-slip head is located in the slot, and the anti-slip head cooperates with the necked opening to limit the insertion rod from falling out of the slot.

6. The delayed-release foot brake assembly according to claim 1, wherein: The linkage mechanism adopts a lever, the fulcrum of the lever is fixed on the frame, a sliding groove is provided on the lever corresponding to the fulcrum, and the lever is set on the frame by inserting the fulcrum into the sliding groove; one end of the lever is connected to the movable end of the first delayed reset element, and the other end of the lever is connected to the foot brake.

7. The delayed-release foot brake assembly according to claim 1, wherein: The linkage mechanism adopts a folding rod, the folding rod's kink point is pivoted to the frame so that the folding rod can rotate around the kink point; the second delayed reset element is a gas spring, the brake block is installed on the second delayed reset element through a swing arm, the brake block is fixed to one end of the swing arm, the other end of the swing arm is pivoted to the frame, one end of the second delayed reset element is pivoted to the swing arm and the other end is pivoted to one end of the folding rod; the first delayed reset element is a gas spring or a gas tension spring, the fixed end of the first delayed reset element is pivoted to the frame, and the movable end of the first delayed reset element is pivoted to the other end of the folding rod.

8. The delayed-release foot brake assembly according to claim 7, wherein: One end of the folding rod of the linkage mechanism pivotally connected to the second time-delay reset element is provided with a foot pedal.

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