A stroller structure with multiple braking dual casters

Abstract

The application discloses a stroller structure with multiple brake double-wheel casters, comprising a first cargo plate and a caster, four inner corners below the first cargo plate are provided with the caster, the caster comprises a main support, a mounting shaft, a brake block and a roller, the main support is provided with a brake driving block and a reset driving block, one end of the brake block is provided with a toothed portion, the opposite end is provided with a brake portion, the back surface of the brake portion is against below the brake driving block, the two sides of the main support are provided with symmetrically arranged rollers, the inner side wall of the roller is provided with a gear ring structure, the two sides of the brake portion are provided with symmetrically arranged arc-shaped toothed plates, the arc-shaped toothed plates are provided with tooth grooves for clamping the gear ring structure, the gear ring structure comprises a first gear ring and a second gear ring arranged in sequence from the inner side wall of the roller, and the first gear ring and the second gear ring are coaxially arranged. Compared with the prior art, the stroller has good locking effect, and adopts a double-layer structure, so that more goods can be conveniently carried.

Description

Technical Field

[0001] This invention belongs to the field of logistics trolleys, and particularly relates to a trolley structure with multiple braking double-wheel casters. Background Technology

[0002] A swivel caster is a bracket mounted on a caster wheel that can rotate 360 ​​degrees horizontally under dynamic or static loads. Swivel casters typically have a braking structure for locking. For example, Chinese patent CN206938338U discloses a swivel caster with a shock-absorbing structure and a braking device. The braking device includes a brake disc with multiple locking teeth, fixedly mounted on a vertical shaft and connected to the bottom of the vertical shaft; a brake bracket connected to a support frame and equipped with a first rotating shaft; a locking pedal rotatably connected to the brake bracket via a second rotating shaft; and an unlocking pedal rotatably connected to the locking pedal via a third rotating shaft. The shock-absorbing structure includes a compression spring and a pressure shaft. The upper and lower ends of the pressure shaft are respectively provided with a first stop and a second stop. A first platform is provided on the vertical shaft, with a first through hole on the first platform. A second platform is provided on the other end of a horizontally mounted transmission bracket fixedly connected to the vertical shaft.

[0003] Existing dual-wheel casters employ braking structures that lock the wheel through friction, or through the engagement of toothed plates and toothed rings. For example, Chinese patent CN212242826U discloses a novel omnidirectional caster, comprising a wheel frame with rollers on both sides. Each roller is connected to a support shaft passing through the wheel frame via bearings. The lower end of the mounting shaft is connected to a vertical mounting hole on the wheel frame via a rotating body, and a chuck is fixed to the bottom of the mounting shaft within a cavity in the wheel frame. A brake drive block rotating downwards can push the brake block to lock the rollers and chuck. A reset drive block rotating upwards causes the brake drive block and brake block to rotate upwards and reset. The brake block, from front to back, includes a toothed portion, a spring mounting portion, a first hinge portion, and a brake portion. The spring mounting portion is connected to one end of a spring, and the other end of the spring rests against a spring mounting cavity formed within the wheel frame cavity. The first hinge portion is hinged to the wheel frame. Two arc-shaped toothed plates on the brake portion extend out of the wheel frame cavity to lock the rollers.

[0004] The trolley uses swivel casters that lock in place with toothed plates and toothed rings. The toothed plates and toothed rings are usually made of plastic, which is easy to deform and damage, resulting in poor locking effect and affecting the use of the trolley. Summary of the Invention

[0005] The purpose of this invention is to provide a trolley structure with multiple braked double wheels, which has a good locking effect and adopts a double-layer structure, making it easier to carry more goods.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a trolley structure with multiple braked double-wheel casters, comprising: a first cargo plate and casters, with casters located at the four inner corners below the first cargo plate. Each caster includes a main bracket, a mounting shaft, a brake block, and rollers. A brake drive block and a reset drive block are provided on the main bracket. The mounting shaft is rotatably mounted on the main bracket. The casters are fixedly mounted on the first cargo plate via the mounting shaft. The bottom of the mounting shaft extends into the inner cavity of the main bracket. A chuck is provided at the bottom of the mounting shaft. The brake block is fixedly mounted. Inside the main bracket, one end of the brake block is provided with a locking tooth and the opposite end is provided with a brake part. The back of the brake part rests against the bottom of the brake drive block. The main bracket has symmetrically arranged rollers on both sides. The inner sidewall of the rollers is provided with a toothed ring structure. The brake part has symmetrically arranged arc-shaped toothed plates on both sides. The arc-shaped toothed plates are provided with tooth grooves for engaging with the toothed ring structure. The toothed ring structure includes a first toothed ring and a second toothed ring arranged sequentially from the inner sidewall of the rollers. The first toothed ring and the second toothed ring are arranged coaxially. The diameter of the second toothed ring is smaller than the diameter of the first toothed ring.

[0007] As a further description of the above technical solution:

[0008] The brake drive block has a bent section.

[0009] As a further description of the above technical solution:

[0010] The back of the brake drive block is provided with reinforcing ribs arranged along its width.

[0011] As a further description of the above technical solution:

[0012] The first cargo platform is equipped with a handrail frame, which includes two parallel support rods.

[0013] As a further description of the above technical solution:

[0014] The first cargo plate is also provided with a second cargo plate, a screw, and a positioning block. The second cargo plate is sleeved on the support rod, and a support rod is hinged to the back of the second cargo plate. The screw is fixedly installed on the first cargo plate, and the end of the screw extends into the cavity inside the support rod. The positioning block is threadedly connected to the support rod. The first cargo plate is provided with a first mounting groove corresponding to the position of the positioning block.

[0015] As a further description of the above technical solution:

[0016] The second loading platform has a second mounting slot on its back for storing the support rod.

[0017] As a further description of the above technical solution:

[0018] The end of the support rod is provided with a connecting sleeve, which is threaded onto the support rod.

[0019] As a further description of the above technical solution:

[0020] The second cargo plate is equipped with slots corresponding to the positions of the connecting sleeves.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0022] 1. In this invention, the double-layer toothed ring on the inner side of the roller, combined with the locking teeth of the brake block, achieves multiple braking of the caster. The double-layer toothed ring design, on the one hand, is less likely to completely deform and fail, improving the roller locking effect; on the other hand, it can increase the strength of the roller, prevent roller deformation, and improve the load-bearing capacity of the trolley.

[0023] 2. In this invention, because the casters have a good locking effect, the trolley can be locked under a larger load. Therefore, the trolley is set as an adjustable double-layer structure, which makes it easier to carry more goods. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention 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.

[0025] Figure 1 This is a side view structural diagram of a trolley structure with multiple braked double-wheel casters.

[0026] Figure 2 This is a schematic diagram of a trolley structure with multiple braked double-wheel casters from a frontal view.

[0027] Figure 3 This is a schematic diagram illustrating the state changes of a trolley structure with multiple braking double-wheel casters.

[0028] Figure 4 This is a schematic diagram of the caster structure in a trolley structure with multiple braking double casters. Figure 1 .

[0029] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[0030] Figure 6 This is a schematic diagram of the caster structure in a trolley structure with multiple braking double casters. Figure 2 .

[0031] Figure 7 This is a schematic diagram of the locked state of the casters in a trolley structure with multiple braking double casters.

[0032] Legend:

[0033] 1. First cargo plate; 11. First mounting slot; 2. Caster; 21. Main bracket; 211. Brake drive block; 2111. Bending section; 2112. Reinforcing rib; 212. Reset drive block; 22. Mounting shaft; 221. Chuck; 23. Brake block; 231. Clamping tooth part; 232. Brake part; 233. Arc-shaped toothed plate; 24. Roller; 25. Gear ring structure; 251. First gear ring; 252. Second gear ring; 3. Handrail frame; 31. Support rod; 311. Cavity; 4. Second cargo plate; 41. Support rod; 42. Second mounting slot; 43. Connecting sleeve; 5. Screw; 6. Positioning block. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the 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 invention without inventive effort are within the scope of protection of the invention.

[0036] 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.

[0037] In the description of the embodiments of the present invention, it should be noted that the terms "upper" and "inner" 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 of the invention is usually placed when in use. They are only for the convenience of describing the present invention 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. Therefore, they should not be construed as limiting the present invention.

[0038] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] Please see Figure 1-7 This invention provides a technical solution: a trolley structure with multiple braked double-wheel casters, comprising: a first cargo plate 1 and casters 2. Casters 2 are located at the four inner corners below the first cargo plate 1. Each caster 2 includes a main support 21, a mounting shaft 22, a brake block 23, and rollers 24. A brake drive block 211 and a reset drive block 212 are mounted on the main support 21. The installation method and operating principle of the brake drive block 211 and the reset drive block 212 are existing technologies and will not be elaborated further. The mounting shaft 22 is rotatably mounted on the main support 21. The casters 2 are fixedly mounted on the first cargo plate 1 via the mounting shaft 22. The bottom of the mounting shaft 22 extends into the inner cavity of the main support 21. A chuck 221 is located at the bottom of the mounting shaft 22. Brake block 23 is fixedly installed inside main bracket 21. One end of brake block 23 is provided with a locking tooth 231 and the opposite end is provided with a brake part 232. The back of brake part 232 abuts against the bottom of brake drive block 211. Rollers 24 are symmetrically arranged on both sides of main bracket 21. A toothed ring structure 25 is provided on the inner side wall of roller 24. Arc-shaped toothed plates 233 are symmetrically arranged on both sides of brake part 232. The arc-shaped toothed plates 233 are provided with tooth grooves for engaging with toothed ring structure 25. Toothed ring structure 25 includes a first toothed ring 251 and a second toothed ring 252 arranged sequentially from the inner side wall of roller 24. The first toothed ring 251 and the second toothed ring 252 are coaxially arranged. The diameter of the second toothed ring 252 is smaller than the diameter of the first toothed ring 251.

[0040] The brake drive block 211 is provided with a bending section 2111. The arc-shaped bending section 2111 on the brake drive block 211 serves two purposes: firstly, it avoids the reset drive block 212, preventing collisions during locking and resetting; secondly, it increases the strength of the brake drive block 211, making it less prone to deformation.

[0041] The brake drive block 211 has reinforcing ribs 2112 arranged along its width direction on the back side, which further improves the strength of the brake drive block 211 and makes the brake drive block 211 less prone to deformation.

[0042] The first cargo platform 1 is equipped with a handrail 3, which includes two parallel support rods 31 to facilitate pushing the trolley.

[0043] The first cargo plate 1 is also provided with a second cargo plate 4, a screw 5, and a positioning block 6. The second cargo plate 4 is sleeved on the support rod 31. A support rod 41 is hinged to the back of the second cargo plate 4. The screw 5 is fixedly installed on the first cargo plate 1. The end of the screw 5 extends into the cavity 311 inside the support rod 31. The positioning block 6 is threadedly connected to the support rod 31. The first cargo plate 1 is provided with a first mounting groove 11 corresponding to the position of the positioning block 6, realizing an adjustable double-layer trolley structure. The trolley can be converted from a single layer to a two-layer structure according to the cargo carrying requirements. In the normal state, the second cargo pallet 4 is stacked on the first cargo pallet 1, and the goods are placed on the second cargo pallet 4. When converting to two layers, pull the handrail 3 upward, and the handrail 3 will drive the second cargo pallet 4 to move upward. After moving to a suitable height, rotate the positioning block 6 upward and place it under the second cargo pallet 4 to support the second cargo pallet 4. At the same time, rotate and open the support rod 41. The bottom of the support rod 41 abuts against the first cargo pallet 1, and the support rod 41 provides support to the end of the second cargo pallet 4.

[0044] The second loading plate 4 has a second mounting groove 42 on its back for storing the support rod 41, which facilitates the storage of the support rod 41 and allows the two loading plates 4 to be stacked flat on the first loading plate 1.

[0045] The end of the support rod 41 is provided with a connecting sleeve 43, which is threaded onto the support rod 41. The connecting sleeve 43 can be rotated to adjust the overall length of the support rod 41, so that the second cargo plate 4 can be placed horizontally for easy placement of goods.

[0046] The second cargo plate 4 is provided with a slot corresponding to the connecting sleeve 43. The connecting sleeve 43 can be inserted into the slot, and the slot positions the support rod 41, improving the support effect of the support rod 41 and facilitating the improvement of the load-bearing capacity of the second cargo plate 4.

[0047] Working principle: When the caster 2 is locked, the brake drive block 211 is stepped on, causing it to rotate downwards. The brake drive block 211 presses against the brake part 232 of the brake block 23. The arc-shaped toothed plate 233 of the brake part 232 engages with the first toothed ring 251 and the second toothed ring 252 on the toothed ring structure 25, preventing the roller 24 from rotating. The retaining tooth 231 at the other end of the brake block 23 engages with the chuck 221, preventing the caster 2 from rotating horizontally, thus locking the caster 2. Simultaneously, the reset drive block 212 rotates upwards under the action of the brake drive block 211. To release the lock of the caster 2, the reset drive block 212 is stepped on, causing it to rotate downwards. The brake drive block 211 rotates upwards, and the brake block 23 resets under the action of elasticity (the specific installation structure of the brake block 23 is existing technology), thus releasing the locked state.

[0048] The double-layer toothed rings (first toothed ring 251 and second toothed ring 252) on the inner side of the roller 24, combined with the locking teeth 231 of the brake block 23, achieve multiple braking of the caster. The double-layer toothed ring design, on the one hand, prevents complete deformation and failure, improving the locking effect of the roller 24; on the other hand, it increases the strength of the roller 24, preventing deformation and improving the load-bearing capacity of the trolley. Because of the good locking effect of the caster, the trolley can lock under a greater load; therefore, the trolley is designed with an adjustable double-layer structure to facilitate carrying more goods.

[0049] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A trolley structure with multiple braking double-wheel casters, characterized in that, include: The first cargo plate (1) and casters (2) are provided. The casters (2) are provided at the four inner corners below the first cargo plate (1). The casters (2) include a main bracket (21), a mounting shaft (22), a brake block (23) and a roller (24). The main bracket (21) is provided with a brake drive block (211) and a reset drive block (212). The mounting shaft (22) is rotatably mounted on the main bracket (21). The casters (2) are fixedly mounted on the first cargo plate (1) through the mounting shaft (22). The bottom of the mounting shaft (22) extends into the inner cavity of the main bracket (21). A chuck (221) is provided at the bottom of the mounting shaft (22). The brake block (23) is fixedly mounted inside the main bracket (21). One end of the brake block (23) is provided with a toothed part (231) and a corresponding toothed part. The other end is provided with a brake part (232), the back of the brake part (232) abuts against the bottom of the brake drive block (211), the main bracket (21) is provided with symmetrically arranged rollers (24) on both sides, the inner sidewall of the rollers (24) is provided with a toothed ring structure (25), the brake part (232) is provided with symmetrically arranged arc-shaped toothed plates (233) on both sides, the arc-shaped toothed plates (233) are provided with tooth grooves for engaging with the toothed ring structure (25), the toothed ring structure (25) includes a first toothed ring (251) and a second toothed ring (252) arranged sequentially from the inner sidewall of the rollers (24), the first toothed ring (251) and the second toothed ring (252) are arranged coaxially, and the diameter of the second toothed ring (252) is smaller than the diameter of the first toothed ring (251); The first cargo platform (1) is provided with a handrail (3), which includes two parallel support rods (31). The first cargo plate (1) is also provided with a second cargo plate (4), a screw (5) and a positioning block (6). The second cargo plate (4) is sleeved on the support rod (31). A support rod (41) is hinged to the back of the second cargo plate (4). The screw (5) is fixedly installed on the first cargo plate (1). The end of the screw (5) extends into the cavity (311) inside the support rod (31). The positioning block (6) is threaded on the support rod (31). The first cargo plate (1) is provided with a first mounting groove (11) whose position corresponds to the positioning block (6). The second cargo plate (4) has a second mounting groove (42) on its back for receiving the support rod (41). The end of the support rod (41) is provided with a connecting sleeve (43), which is threaded onto the support rod (41); The second cargo plate (4) is provided with a slot corresponding to the position of the connecting sleeve (43); The double-layer toothed ring on the inner side of the roller, combined with the locking teeth of the brake block, achieves multiple braking of the caster.

2. The trolley structure with multiple braking double-wheel casters according to claim 1, characterized in that, The brake drive block (211) is provided with a bent section (2111).

3. The trolley structure with multiple braking double-wheel casters according to claim 1, characterized in that, The brake drive block (211) has a reinforcing rib (2112) arranged along its width direction on the back.

Images