Stair climbing triangular wheel with braking function

Abstract

The utility model discloses a stair -climbing triangular wheel with brake function, apply to in the cart, and the stair -climbing triangular wheel includes frame, axle and triangular wheel subassembly, and the triangular wheel subassembly includes triangular wheel frame and three gyro wheels on the triangular wheel frame, and the stair -climbing triangular wheel still includes sliding sleeve structure, drive unit and brake frame, two sliding sleeve structures are respectively slidingly connected in the both sides of axle, and drive unit is located between two sliding sleeve structures, is used for driving sliding sleeve structure to move to triangular wheel subassembly, is equipped with first return spring between sliding sleeve structure and frame, brake frame slidingly connects on the triangular wheel frame, and brake frame is located between triangular wheel subassembly and sliding sleeve structure, is equipped with first brake structure on brake frame and gyro wheel, and is equipped with second brake structure between triangular wheel frame and sliding sleeve structure. The user through drive unit realizes synchronous locking of triangular wheel gyro wheel and triangular wheel frame, and the security of using above -mentioned stair -climbing triangular wheel with brake function is ensured.

Description

Technical Field

[0001] This utility model relates to the field of triangular wheel technology, specifically to a stair-climbing triangular wheel with braking function. Background Technology

[0002] Triangle wheels, also known as stair-climbing wheels or escalator wheels (hereinafter referred to as "triangle wheels"), are popular because they can climb stairs and traverse steps. For example, small moving trolleys that climb stairs use these triangle wheels. (See also: [link to article]). Figure 1 As shown in the diagram, its structural features are as follows: three small wheels on one side are fixed to a central axis at equal intervals and angles via a wheel frame. These three wheels can either rotate on their own axis or revolve around the central axis. When traveling on flat ground, the two wheels on the lower side in contact with the ground rotate on their own axis. When going up or down stairs, all three wheels revolve around the central axis.

[0003] The "stair climbing triangular wheel" is a mature technology and a widely used mechanical tool for climbing stairs. However, current "stair climbing triangular wheels" lack braking functions, posing safety risks and limiting their application. Utility Model Content

[0004] To address the aforementioned shortcomings of existing technologies, a stair-climbing triangular wheel with braking function is provided, enabling synchronous locking of the triangular wheel roller and the triangular wheel frame.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A stair-climbing triangular wheel with braking function is used in a trolley. The stair-climbing triangular wheel includes a frame, an axle fixed on the frame, and a triangular wheel assembly rotatably connected to both ends of the axle. The triangular wheel assembly includes a triangular wheel frame and three rollers on the triangular wheel frame.

[0007] The stair-climbing triangular wheel also includes a sliding sleeve structure, a drive unit, and a brake frame; the two sliding sleeve structures are slidably connected to both sides of the axle, and the drive unit is located between the two sliding sleeve structures to drive the sliding sleeve structures to move towards the triangular wheel assembly; a first return spring is provided between the sliding sleeve structure and the frame;

[0008] The brake frame is slidably connected to the triangular wheel frame, and the brake frame is located between the triangular wheel assembly and the sliding sleeve structure; a first braking structure is provided on the brake frame and the roller, and a second braking structure is provided between the triangular wheel frame and the sliding sleeve structure;

[0009] The sliding sleeve structure is moved by the drive unit to lock the first braking structure and the second braking structure; when the drive unit is disconnected, the first reset spring releases the lock of the first braking structure and the second braking structure.

[0010] According to the above technical solution, the second braking structure includes a second brake bolt that is slidably connected to the triangular wheel frame, and a plurality of second brake holes provided on the sliding sleeve structure and matching the second brake bolt.

[0011] According to the above technical solution, a third return spring is provided between the second brake bolt and the triangular wheel frame.

[0012] According to the above technical solution, at least one set of matching second brake bolts and second brake holes is provided.

[0013] According to the above technical solution, the second braking structure includes a first friction surface fixed on the triangular wheel frame and a second friction surface fixedly connected to the sliding sleeve structure; the first friction surface and the second friction surface are brought into contact by the drive unit.

[0014] According to the above technical solution, the first braking structure includes three first brake bolts fixedly connected to the brake frame, a plurality of first brake holes provided on the roller, and a second return spring connected between the brake frame and the triangular wheel frame.

[0015] The positions of the three first brake bolsters are matched with the positions of the three rollers, and a number of first brake holes are circumferentially spaced on the trajectory circle that matches the rollers and the first brake bolsters.

[0016] According to the above technical solution, two connecting blocks are provided on the axle and fixedly connected to the frame;

[0017] Each of the aforementioned sliding sleeve structures includes a brake slide plate, a brake slide tube, a secondary brake push plate, a brake connecting rod, and a main brake push plate, all fixedly connected to each other. The brake slide plate, brake slide tube, and secondary brake push plate are sleeved on the axle between two connecting blocks, and the main brake push plate is sleeved on the axle between the connecting blocks and the triangular wheel assembly. Several through holes parallel to the axle are provided on the connecting blocks, and the brake connecting rod passes through the through holes, with both ends fixedly connected between the secondary brake push plate and the main brake push plate. A first return spring is sleeved on the brake connecting rod.

[0018] The second braking structure is located between the triangular wheel frame and the main braking push plate.

[0019] According to the above technical solution, the triangular wheel frame includes a fixed block located in the middle, an outer wheel frame and an inner wheel frame connected on both sides of the fixed block, and a wheel axle fixedly connected at both ends between the inner wheel frame and the outer wheel frame; both the inner wheel frame and the outer wheel frame are Y-shaped structures, and a rotating hole connected to the axle is provided in the middle of the inner wheel frame, the fixed block and the outer wheel frame.

[0020] According to the above technical solution, the drive unit includes a lever seat, a first lever, a second lever, a brake cable assembly, and a fourth return spring; the lever seat is fixed on the axle, and a lever shaft is provided on the lever seat; the middle parts of the first lever and the second lever are rotatably connected to the lever seat through the lever shaft; the first end of the first lever and the first end of the second lever are respectively attached to the ends of the two side sliding sleeve structures; the second end of the first lever and the second end of the second lever are connected by the brake cable assembly; and the fourth return spring is connected to the second end of the first lever and the second lever.

[0021] Driven by the brake line assembly, the second end of the first lever and the second end of the second lever move closer to each other, while the first end of the first lever and the first end of the second lever move further apart.

[0022] According to the above technical solution, the drive unit includes a rotating shaft fixedly connected to the axle, a brake cam rotatably connected to the rotating shaft, a brake link fixedly connected to the brake cam at one end, and a brake pedal fixedly connected to the other end of the brake link; the two ends of the brake cam respectively abut against the ends of the sliding sleeve structure.

[0023] This utility model has the following beneficial effects:

[0024] 1. A dual braking structure is installed between the brake bracket and the triangular wheel frame. A first braking structure is installed between the brake bracket and the roller, with the brake bracket slidably connected to the triangular wheel frame. When the user uses the drive unit to move the sliding sleeve structure along the axle towards the triangular wheel frame, the sliding sleeve structure presses against the brake bracket, locking the first braking structure. During the movement of the sliding sleeve structure towards the triangular wheel frame, the second braking structure is locked. Based on this structure, the user, through the drive unit, achieves synchronous locking of the triangular wheel roller and the triangular wheel frame, ensuring safety when using the aforementioned stair-climbing triangular wheel with braking function.

[0025] 2. Two braking schemes are provided between the brake bracket and the triangular wheel bracket to suit different usage scenarios and improve the versatility of this application.

[0026] 3. Two schemes for driving the sliding sleeve structure to slide on the axle are provided, which are suitable for different application scenarios and improve the versatility of this application.

[0027] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0029] Figure 1 This is a schematic diagram illustrating the principle of a triangular wheel crossing a staircase in existing technology.

[0030] Figure 2 This is a schematic diagram of the structure of the first embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the second embodiment provided by this utility model;

[0032] Figure 4 This is an exploded view of the components provided in an embodiment of this utility model;

[0033] In the diagram, 1. Frame; 2. Axle; 2-1. Main axle; 2-2. Secondary axle; 2-3. Mounting hole; 2-4. Limiting bolt; 3. Triangular wheel frame; 4. Roller; 5. Sliding sleeve structure; 5-1. Brake slide plate; 5-2. Brake slide tube; 5-3. Secondary brake push plate; 5-4. Brake connecting rod; 5-5. Main brake push plate; 6. Drive unit; 7. Brake frame; 8. First return spring; 9. First braking structure; 9-1. First brake bolt; 9-2. First brake hole; 9-3, Second return spring; 10, Second braking structure; 10-1, Second brake bolt; 10-2, Second brake hole; 10-3, Third return spring; 11, Lever seat; 12, First lever; 13, Second lever; 14, Brake cable assembly; 14-1, Handle seat; 14-2, Rotating handle; 14-3, Brake pipe; 14-4, Brake cable; 15, Fourth return spring; 16, Rotating shaft; 17, Brake cam; 18, Brake linkage; 19, Brake pedal. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 2-4 The principles and features of this utility model are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0035] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] Reference Figures 2-4 As shown, the present invention provides a stair-climbing triangular wheel with braking function.

[0038] Example 1

[0039] It is used in strollers, such as trolleys, children's strollers, and other hand-held strollers;

[0040] The stair-climbing triangular wheel includes a frame 1, an axle 2 fixed on the frame, and a triangular wheel assembly rotatably connected to both ends of the axle; the triangular wheel assembly includes a triangular wheel frame 3 and three rollers 4 mounted on the triangular wheel frame;

[0041] The stair-climbing triangular wheel also includes a sliding sleeve structure 5, a drive unit 6, and a brake frame 7; the two sliding sleeve structures are slidably connected to both sides of the axle, and the drive unit is located between the two sliding sleeve structures to drive the sliding sleeve structures to move towards the triangular wheel assembly; a first return spring 8 is provided between the sliding sleeve structure and the frame;

[0042] The brake frame is slidably connected to the triangular wheel frame, and the brake frame is located between the triangular wheel assembly and the sliding sleeve structure; a first braking structure 9 is provided on the brake frame and the roller, and a second braking structure 10 is provided between the triangular wheel frame and the sliding sleeve structure;

[0043] The sliding sleeve structure is moved by the drive unit to lock the first braking structure and the second braking structure; when the drive unit is disconnected, the first reset spring releases the lock of the first braking structure and the second braking structure.

[0044] Example 2

[0045] Based on Example 1, two preferred forms of the second braking structure are given;

[0046] In the first embodiment, the second braking structure includes a second brake plug 10-1 slidably connected to the triangular wheel frame, and a plurality of second brake holes 10-2 provided on the sliding sleeve structure and matching the second brake plug. To allow the second brake plug to be inserted into the second brake holes, a third return spring 10-3 is provided between the second brake plug and the triangular wheel frame. At least one set of matching second brake plugs and second brake holes is provided.

[0047] As the sliding sleeve structure moves towards the triangular wheel assembly, it compresses the brake frame, causing it to move towards the triangular wheel frame. The brake frame then compresses the second braking structure located on the triangular wheel frame. If the second brake bolt on the triangular wheel frame is not aligned with the second brake hole on the brake frame, the second brake bolt, under the action of the third return spring, rests against the brake frame, and the triangular wheel frame is not locked. As the triangular wheel frame continues to rotate, the second brake bolt rotates accordingly. After the second brake bolt aligns with the second brake hole, under the action of the compressed third return spring, the second brake bolt inserts into the second brake hole, thus locking the triangular wheel frame.

[0048] The second type includes a first friction surface fixed to the triangular wheel frame and a second friction surface fixedly connected to the sliding sleeve structure; a drive unit enables the first and second friction surfaces to engage. As the brake frame moves toward the triangular wheel frame, the first and second friction surfaces engage, thereby locking the triangular wheel frame.

[0049] Example 3

[0050] Based on embodiments 1 and 2, a preferred form of the first braking structure is given.

[0051] The first braking structure includes three first brake bolts 9-1 fixedly connected to the brake frame, a plurality of first brake holes 9-2 provided on the roller, and a second return spring 9-3 connected between the brake frame and the triangular wheel frame;

[0052] The positions of the three first brake bolsters are matched with the positions of the three rollers, and a number of first brake holes are circumferentially spaced on the trajectory circle that matches the rollers and the first brake bolsters.

[0053] As the sliding sleeve structure moves toward the triangular wheel assembly, the sliding sleeve structure presses against the brake frame, and the first brake bolt, which is fixedly connected to the brake frame, moves toward the roller. As the roller rotates, the first brake bolt is inserted into one of the first brake holes of the roller, thereby locking the roller and the fixed frame, thus restricting the rotation of the roller on the triangular wheel frame and achieving the purpose of roller braking.

[0054] In embodiments 1-3, two connecting blocks are provided on the axle and fixedly connected to the frame;

[0055] Each of the aforementioned sliding sleeve structures includes a brake slide plate 5-1, a brake slide tube 5-2, a brake secondary push plate 5-3, a brake connecting rod 5-4, and a brake main push plate 5-5, all fixedly connected to each other. The brake slide plate, brake slide tube, and brake secondary push plate are sleeved on the axle between two connecting blocks, and the brake main push plate is sleeved on the axle between the connecting block and the triangular wheel assembly. Several through holes parallel to the axle are provided on the connecting block, and the brake connecting rod passes through the through holes, with both ends fixedly connected between the brake secondary push plate and the brake main push plate. A first return spring is sleeved on the brake connecting rod.

[0056] The second braking structure is located between the triangular wheel frame and the main brake push plate. As shown in the figure, there are three second brake holes on the main brake push plate.

[0057] In embodiments 1-3, the triangular wheel frame includes a fixed block located in the middle, an outer wheel frame and an inner wheel frame connected on both sides of the fixed block, and a wheel axle fixedly connected at both ends between the inner wheel frame and the outer wheel frame; both the inner wheel frame and the outer wheel frame are Y-shaped structures, and a rotating hole connected to the axle is provided in the middle of the inner wheel frame, the fixed block and the outer wheel frame.

[0058] Example 4

[0059] Based on embodiments 1-3, two preferred structural forms of the driving unit are given.

[0060] In the first embodiment, the drive unit includes a lever seat 11, a first lever 12, a second lever 13, a brake cable assembly 14, and a fourth return spring 15. The lever seat is fixed on the axle, and a lever pivot is provided on the lever seat. The middle parts of the first lever and the second lever are rotatably connected to the lever seat through the lever pivot. The first end of the first lever and the first end of the second lever are respectively attached to the ends of the two side sliding sleeve structures. The second end of the first lever and the second end of the second lever are connected by the brake cable assembly. The fourth return spring is connected to the second end of the first lever and the second lever.

[0061] Driven by the brake line assembly, the second end of the first lever and the second end of the second lever move closer to each other, while the first end of the first lever and the first end of the second lever move further apart.

[0062] In the above embodiments, the brake cable assembly is a prior art structure, providing a common structural form of the brake cable assembly. The brake cable assembly includes a handle seat 14-1 fixed to the push handle of the cart, a rotating handle 14-2 rotatably connected to the handle seat, a brake tube 14-3 connected between the handle seat and the first lever, and a brake cable 14-4 placed inside the brake tube and connected at both ends between the second lever and the rotating handle. In the above structure, a through hole is provided at the connection between the first lever and the brake tube for the brake cable to pass through; a fourth return spring is sleeved on the brake cable between the first lever and the second lever, and its two ends are respectively connected to the first lever and the second lever.

[0063] The user pinches the rotating handle at the handle base, rotating the handle to pull the brake cable, which in turn pulls the second end of the second lever; this causes the second ends of the second lever and the first lever to move closer together. During this process, the first ends of the second lever and the first lever move away from each other, thereby moving the two push-sliding sleeve structures toward the triangular wheel assembly.

[0064] After the user releases the rotating handle at the handle seat, the second ends of the second lever and the first lever move away from each other under the action of the fourth return spring; at the same time, the first return spring pushes the two sliding sleeve structures to move closer to each other, so that the first ends of the second lever and the first lever move closer to each other.

[0065] The second type includes a drive unit comprising a rotating shaft 16 fixedly connected to the axle, a brake cam 17 rotatably connected to the rotating shaft, a brake link 18 fixedly connected at one end to the brake cam, and a brake pedal 19 fixedly connected to the other end of the brake link; the two ends of the brake cam respectively abut against the ends of the sliding sleeve structure.

[0066] When the user depresses the brake pedal, the brake cam rotates from an inclined state to a horizontal state, or to a near-horizontal state, pushing the sliding sleeve structures on both sides towards the triangular wheel assemblies at both ends. After the brake pedal is released, the sliding sleeve structures move towards the drive unit under the action of the second return spring, and the brake cam returns from a horizontal or near-horizontal state to an inclined state.

[0067] In the above structure, a preferred axle form is provided, the axle includes a main shaft 2-1 in the middle and secondary shafts 2-2 located at both ends of the main shaft, the triangular wheel frame is provided with mounting holes 2-3 that match the secondary shafts, and the triangular wheel frame is restricted to rotate on the secondary shafts by limiting bolts 2-4.

[0068] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A stair-climbing triangular wheel with braking function, used in a trolley, the stair-climbing triangular wheel including a frame, an axle fixed on the frame, and a triangular wheel assembly rotatably connected to both ends of the axle; the triangular wheel assembly includes a triangular wheel frame and three rollers disposed on the triangular wheel frame; Its features are: The stair-climbing triangular wheel also includes a sliding sleeve structure, a drive unit, and a brake frame; the two sliding sleeve structures are slidably connected to both sides of the axle, and the drive unit is located between the two sliding sleeve structures to drive the sliding sleeve structures to move towards the triangular wheel assembly; a first return spring is provided between the sliding sleeve structure and the frame; The brake frame is slidably connected to the triangular wheel frame, and the brake frame is located between the triangular wheel assembly and the sliding sleeve structure; a first braking structure is provided on the brake frame and the roller, and a second braking structure is provided between the triangular wheel frame and the sliding sleeve structure; The drive unit includes a rotating shaft fixedly connected to the axle, a brake cam rotatably connected to the rotating shaft, a brake link fixedly connected to the brake cam at one end, and a brake pedal fixedly connected to the other end of the brake link; the two ends of the brake cam respectively abut against the ends of the sliding sleeve structure. The sliding sleeve structure is moved by the drive unit to lock the first braking structure and the second braking structure. Disconnect the drive unit, and the first return spring will release the lock of the first braking structure and the second braking structure.

2. The stair-climbing triangular wheel with braking function according to claim 1, characterized in that: The second braking structure includes a second brake plug that is slidably connected to the triangular wheel frame, and a plurality of second brake holes provided on the sliding sleeve structure and matching the second brake plug.

3. The stair-climbing triangular wheel with braking function according to claim 2, characterized in that: A third return spring is provided between the second brake bolt and the triangular wheel frame.

4. The stair-climbing triangular wheel with braking function according to claim 2, characterized in that: At least one set of matching second brake bolts and second brake holes is provided.

5. The stair-climbing triangular wheel with braking function according to claim 1, characterized in that: The second braking structure includes a first friction surface fixed on the triangular wheel frame and a second friction surface fixedly connected to the sliding sleeve structure; the first friction surface and the second friction surface are brought into contact by the drive unit.

6. The stair-climbing triangular wheel with braking function according to any one of claims 1-5, characterized in that: The first braking structure includes three first brake bolts fixedly connected to the brake frame, a plurality of first brake holes provided on the roller, and a second return spring connected between the brake frame and the triangular wheel frame; The positions of the three first brake bolsters are matched with the positions of the three rollers, and a number of first brake holes are circumferentially spaced on the trajectory circle that matches the rollers and the first brake bolsters.

7. The stair-climbing triangular wheel with braking function according to claim 6, characterized in that: Two connecting blocks are provided on the axle to be fixedly connected to the frame; Each of the aforementioned sliding sleeve structures includes a brake slide plate, a brake slide tube, a secondary brake push plate, a brake connecting rod, and a main brake push plate, all fixedly connected to each other. The brake slide plate, brake slide tube, and secondary brake push plate are sleeved on the axle between two connecting blocks, and the main brake push plate is sleeved on the axle between the connecting blocks and the triangular wheel assembly. Several through holes parallel to the axle are provided on the connecting blocks, and the brake connecting rod passes through the through holes, with both ends fixedly connected between the secondary brake push plate and the main brake push plate. A first return spring is sleeved on the brake connecting rod. The second braking structure is located between the triangular wheel frame and the main braking push plate.

8. The stair-climbing triangular wheel with braking function according to claim 6, characterized in that: The triangular wheel frame includes a fixed block in the middle, an outer wheel frame and an inner wheel frame connected on both sides of the fixed block, and a wheel axle fixedly connected at both ends between the inner wheel frame and the outer wheel frame; both the inner wheel frame and the outer wheel frame are Y-shaped structures, and a rotating hole connected to the axle is provided in the middle of the inner wheel frame, the fixed block and the outer wheel frame.

9. The stair-climbing triangular wheel with braking function according to claim 6, characterized in that: The drive unit includes a lever seat, a first lever, a second lever, a brake cable assembly, and a fourth return spring. The lever seat is fixed on the axle, and a lever shaft is provided on the lever seat. The middle parts of the first lever and the second lever are rotatably connected to the lever seat through the lever shaft. The first end of the first lever and the first end of the second lever are respectively attached to the ends of the two sliding sleeve structures. The second end of the first lever and the second end of the second lever are connected by the brake cable assembly. The fourth return spring is connected to the second end of the first lever and the second lever. Driven by the brake line assembly, the second end of the first lever and the second end of the second lever move closer to each other, while the first end of the first lever and the first end of the second lever move further apart.

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