Multifunctional universal trundle device

Abstract

The utility model provides a multifunctional universal trundle device which comprises a base plate, a support is rotatably connected to the bottom end of the base plate, idler wheels are installed on the inner side of the support through shafts, and clamping grooves are symmetrically formed in the front side and the rear side of the base plate. A plurality of groups of tooth grooves are circumferentially formed in the bottom side of the chassis at equal intervals; a brake locking assembly or a fixing assembly is installed on one side of the top of the support. The brake locking assembly comprises a connecting frame fixedly installed on one side of the support, and a pedal and a brake plate are rotationally installed on the inner side of the connecting frame. One end of the brake plate is provided with two groups of brake clamping corners which can be connected with the tooth grooves in a clamping manner; and the other end of the brake plate is connected with a brake nut which can be connected with the roller. According to the utility model, the tooth grooves which are circumferentially distributed are formed in the bottom side of the chassis, and the brake locking component with the brake clamping angle is arranged on the bracket, so that the brake clamping angle can be firmly clamped into the tooth grooves of the chassis by operating the brake locking component during use, and the steering angle of the bracket can be rigidly locked in any required direction.

Description

Technical Field

[0001] This utility model belongs to the field of caster technology, and more specifically, relates to a multifunctional universal caster device. Background Technology

[0002] Due to their unique swivel mechanism design (usually including ball bearings or swivel bearings), swivel casters can achieve 360-degree horizontal free turning, giving the load-bearing equipment excellent mobility and ease of operation, making them widely used in many fields such as logistics handling, industrial equipment, medical devices, and office furniture.

[0003] However, existing swivel casters generally have a significant limitation: their structural design typically lacks a mechanism to effectively lock the caster's steering angle. During equipment movement, especially when precise control of the direction of travel is required, for stationary parking, or movement on uneven ground, swivel casters are prone to unexpected and uncontrollable directional deflection due to external forces, uneven ground friction, or changes in the equipment's center of gravity. Although existing technologies include braking devices for wheel rolling (wheel brakes), these devices primarily act on the wheel itself, preventing it from rolling, and cannot effectively limit or fix the rotation direction of the caster support. Therefore, in view of this, this study aims to research and improve existing structures and address their shortcomings, providing a multifunctional swivel caster device with greater practical value. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a multi-functional universal caster device, which is achieved by the following specific technical means:

[0005] A multi-functional omnidirectional caster device includes a chassis, a bracket rotatably connected to the bottom of the chassis, rollers mounted on the inner side of the bracket via an axle, and symmetrical slots on the front and rear sides of the chassis; multiple sets of toothed grooves are circumferentially spaced on the bottom side of the chassis; a brake locking assembly or fixing assembly is mounted on one side of the top of the bracket; the brake locking assembly includes a connecting frame fixedly mounted on one side of the bracket, a pedal and a brake plate rotatably mounted on the inner side of the connecting frame; one end of the brake plate is provided with two sets of brake clips that can engage with the toothed grooves; the other end of the brake plate is connected to a brake nut that can engage with the rollers; the fixing assembly includes a directional fixing frame rotatably mounted on one side of the bracket, and a locking block that can engage with the slots on the top of the directional fixing frame.

[0006] Furthermore, the pedal is rotatably connected to the connecting frame via a shaft, and two sets of convex wings are symmetrically arranged on the bottom side of the pedal, with the bottom ends of the two sets of convex wings in close contact with the top end of the brake plate.

[0007] Furthermore, the brake plate is a bent plate with an obtuse angle, and the bend is set in an arc shape; a lever shaft is installed inside the connecting frame, and the lever shaft is located on the bottom side of the bend; a return spring is fitted on the outside of the lever shaft, the return spring is a torsion spring, and the two ends of the torsion spring are respectively abutted against the bottom side of the connecting frame and the bottom side of the brake plate.

[0008] Furthermore, the two ends of the direction fixing frame are provided with connecting ears, and the connecting ears are rotatably connected to the bracket via shafts; a limit block and a drive block are respectively provided on one side of the two sets of connecting ears.

[0009] Furthermore, a connecting sleeve is provided on the bottom side of the chassis, and a connecting hole is provided at the top of the bracket to rotatably connect with the connecting sleeve; the connecting sleeve passes through the connecting hole and is provided with a limiting flange.

[0010] Furthermore, the upper and lower sides of the bracket are provided with circular steel ball tracks concentric with the connection holes, and rolling components are installed in the circular steel ball tracks; the rolling components include retaining rings, and multiple sets of mounting grooves are provided at equal angles on the outer side of the retaining rings, and steel balls are placed in the mounting grooves.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. This utility model, by setting circumferentially distributed toothed grooves on the bottom side of the chassis and equipping the bracket with a brake locking component with a brake locking angle, enables the brake locking component to be operated during use, so that the brake locking angle can be firmly locked into the toothed grooves of the chassis, thereby rigidly locking the steering angle of the bracket in any desired direction. This solves the problem that existing swivel casters are prone to unexpected and uncontrollable deflection when moving, parking or working on uneven ground due to the lack of a directional locking mechanism. It significantly improves the controllability of the equipment's travel direction, the accuracy of fixed-point parking, and the stability of movement in complex terrain.

[0013] 2. This utility model's brake locking assembly not only locks the steering angle through the brake lever angle, but also achieves traditional wheel rolling braking by acting on the roller through the brake nut at the end. Simultaneously, the optional fixing assembly provides another reliable directional locking method; the engaging connection between the locking block and the chassis slot further enhances the strength and stability of the directional fixation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall assembly structure in Embodiment 1 of this utility model.

[0015] Figure 2 This is a schematic diagram of the structural breakdown in Embodiment 1 of this utility model. Figure 1 .

[0016] Figure 3This is a schematic diagram of the structural breakdown in Embodiment 1 of this utility model. Figure 2 .

[0017] Figure 4 This is a partial cross-sectional view of the structure in Embodiment 1 of this utility model.

[0018] Figure 5 yes Figure 4 Enlarged diagram of part A in the middle.

[0019] Figure 6 This is a schematic diagram of the unlocked state of the fixed component in Embodiment 2 of this utility model.

[0020] Figure 7 This is a schematic diagram of the locking state of the fixing component in Embodiment 2 of this utility model.

[0021] Figure 8 This is a structural breakdown diagram of Embodiment 2 of this utility model.

[0022] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0023] 1. Chassis; 2. Bracket; 3. Rollers; 4. Brake locking assembly; 5. Fixing assembly; 6. Rolling assembly;

[0024] 101. Connecting sleeve; 102. Limiting flange; 103. Toothed groove; 104. Slot;

[0025] 401. Connecting bracket; 402. Pedal; 403. Brake plate; 404. Brake caliper; 405. Brake nut; 406. Return spring;

[0026] 501, Card Block; 502, Limit Block; 503, Drive Block. Detailed Implementation

[0027] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0028] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Example 1:

[0031] As attached Figure 1 To be continued Figure 5 As shown, this utility model provides a multi-functional universal caster device, including a chassis 1. A bracket 2 is rotatably connected to the bottom end of the chassis 1. A roller 3 is mounted on the inner side of the bracket 2 via a shaft. Slots 104 are symmetrically arranged on the front and rear sides of the chassis 1. Multiple sets of toothed grooves 103 are circumferentially and equidistantly arranged on the bottom side of the chassis 1, and these toothed grooves 103 are integrally stamped. A brake locking assembly 4 is installed on one side of the top of the bracket 2. The brake locking assembly 4 includes a connecting frame 401 fixedly installed on one side of the bracket 2, and a pedal 402 and a brake plate 403 are rotatably mounted on the inner side of the connecting frame 401. The brake plate 403 has two sets of brake calipers 404 at one end that can be locked into the tooth groove 103; the other end of the brake plate 403 is connected to a brake nut 405 that can be connected to the roller 3; the brake locking assembly 4 locks into the chassis tooth groove 103 through the brake calipers 404, realizing rigid and multi-angle locking of the steering angle of the bracket 2, solving the core problem of uncontrollable steering and easy deflection of existing universal casters. At the same time, the brake nut 405 acts on the roller 3 to realize braking of the roller's rolling. A single component can lock steering and rolling, which can effectively improve the overall braking performance.

[0032] The pedal 402 is rotatably connected to the connecting frame 401 via a shaft. Two sets of convex wings are symmetrically arranged on the bottom side of the pedal 402, with the bottom ends of the two sets of convex wings tightly abutting the top of the brake plate 403. The brake plate 403 is a bent plate with an obtuse angle, and the bend is arc-shaped. A lever shaft is installed inside the connecting frame 401, and the lever shaft is located on the bottom side of the bend. The convex wing design of the pedal 402, combined with the bent lever structure of the brake plate 403 and the lever shaft fulcrum, effectively transmits the force of pressing the pedal 402, driving the brake locking angle 404 to engage with the toothed groove 103 and drive... The brake nut 405 presses against the roller to ensure the firmness and reliability of steering and rolling lock. A return spring 406 is fitted on the outside of the lever shaft. The return spring 406 is a torsion spring, and its two ends are respectively set to abut against the bottom side of the connecting frame 401 and the bottom side of the brake plate 403. The setting of the return spring 406 (torsion spring) can automatically pull the brake plate 403 back to its original position after the unlocking pedal 402 is pulled up, so that the brake caliper 404 and the brake nut 405 are respectively separated from the tooth groove 103 and the roller 3 to release the locked state without additional operation, which is convenient and quick to use.

[0033] The chassis 1 has a connecting sleeve 101 on its bottom side, and the bracket 2 has a connecting hole at its top that is rotatably connected to the connecting sleeve 101. The connecting sleeve 101 passes through the connecting hole and is provided with a limiting flange 102. The connecting sleeve 101 cooperates with the connecting hole of the bracket 2 and is constrained by the limiting flange 102, which ensures the stability of the rotatable connection and axial positioning between the bracket 2 and the chassis 1, prevents it from coming off, and makes the structure durable.

[0034] The bracket 2 has circular steel ball tracks concentric with the connecting holes on both its upper and lower sides. Rolling components 6 are installed in each of these circular steel ball tracks. Each rolling component 6 includes a retaining ring with multiple sets of mounting grooves at equal angles on its outer side. Steel balls are placed in each mounting groove to ensure that the steel balls are evenly distributed, achieving uniform force distribution between the bracket 2 and the chassis 1, and effectively preventing collisions between the steel balls. The rolling components 6 significantly reduce the frictional resistance when the bracket 2 rotates relative to the chassis 1, making the casters easier, more flexible, and smoother to turn, thus improving the user experience.

[0035] Example 2:

[0036] As attached Figure 6 To be continued Figure 8 The difference from Example 1 is that:

[0037] Replace the brake locking component 4 with a fixing component 5; the fixing component 5 includes a directional fixing frame rotatably mounted on one side of the bracket 2, the top of the directional fixing frame is provided with a locking block 501 that can engage with the locking slot 104, and the locking block 501 and the locking slot 104 can be locked by static friction after connection; both ends of the directional fixing frame are provided with connecting ears, and the connecting ears are rotatably connected to the bracket 2 through shafts; one side of each of the two sets of connecting ears is provided with a limit block 502 and a drive block 503, the limit block 502 and the drive block 503 face the same direction, the limit block 502 can contact and limit the directional fixing frame when the fixing component 5 is in the unlocked state, and prevent it from contacting the roller 3, ensuring that the roller 3 rolls normally without obstruction, thus improving safety and reliability; the drive block 503 allows the user to easily rotate the directional fixing frame to achieve locking and unlocking.

[0038] The fixing component 5 is engaged with the slot 104 of the chassis 1 via the locking block 501, providing a relatively simple and direct steering locking method with high cost-effectiveness. For scenarios where only fixed steering in a specific direction (such as forward / rear) is required, it provides an effective alternative to Embodiment 1, and also solves the steering loss-of-control problem.

[0039] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A multi-functional omnidirectional caster device, comprising a chassis (1), wherein a bracket (2) is rotatably connected to the bottom end of the chassis (1), and a roller (3) is mounted on the inner side of the bracket (2) via a shaft, characterized in that: The chassis (1) has symmetrical slots (104) on its front and rear sides; the bottom side of the chassis (1) has multiple sets of toothed grooves (103) arranged in a circular shape at equal intervals. A braking locking assembly (4) or a fixing assembly (5) is installed on one side of the top of the bracket (2); The brake locking assembly (4) includes a connecting frame (401) fixedly installed on one side of the bracket (2). A pedal (402) and a brake plate (403) are rotatably installed on the inner side of the connecting frame (401). One end of the brake plate (403) is provided with two sets of brake clips (404) that can be locked with the tooth groove (103). The other end of the brake plate (403) is connected to a brake nut (405) that can be connected with the roller (3). The fixing component (5) includes a directional fixing bracket rotatably mounted on one side of the bracket (2), and the top of the directional fixing bracket is provided with a locking block (501) that can engage with the locking slot (104).

2. The multi-functional swivel caster device as described in claim 1, characterized in that: The pedal (402) is rotatably connected to the connecting frame (401) via a shaft. Two sets of convex wings are symmetrically arranged on the bottom side of the pedal (402), and the bottom ends of the two sets of convex wings are in close contact with the top end of the brake plate (403).

3. The multi-functional swivel caster device as described in claim 2, characterized in that: The brake plate (403) is a bent plate with an obtuse angle, and the bend is set in an arc shape; a lever shaft is installed inside the connecting frame (401), and the lever shaft is set on the bottom side of the bend; a return spring (406) is fitted on the outside of the lever shaft, the return spring (406) is a torsion spring, and the two ends of the torsion spring are respectively abutted against the bottom side of the connecting frame (401) and the bottom side of the brake plate (403).

4. The multi-functional swivel caster device as described in claim 1, characterized in that: The two ends of the direction fixing frame are provided with connecting ears, and the connecting ears are rotatably connected to the bracket (2) via shafts; a limit block (502) and a drive block (503) are respectively provided on one side of the two sets of connecting ears.

5. The multi-functional swivel caster device as described in claim 1, characterized in that: The bottom side of the chassis (1) is provided with a connecting sleeve (101), and the top of the bracket (2) is provided with a connecting hole that is rotatably connected to the connecting sleeve (101); the connecting sleeve (101) passes through the connecting hole and is provided with a limiting flange (102).

6. The multi-functional swivel caster device as described in claim 5, characterized in that: Both sides of the bracket (2) are provided with circular steel ball tracks concentric with the connecting holes, and rolling components (6) are installed in the circular steel ball tracks. The rolling components (6) include retaining rings, and multiple sets of mounting grooves are provided at equal angles on the outer side of the retaining rings. Steel balls are placed in the mounting grooves.

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