An adjustable height support arm for a caster wheel

Abstract

The utility model relates to technical field of adjustable support arm for universal wheel, disclose a adjustable height support arm for universal wheel, including support arm, the inner wall sliding connection of support arm has extendable arm, the bottom fixed connection of support arm has universal wheel, the lateral wall of extendable arm is set up with the toothing, the lateral wall rotationally connected with the adjusting plate of support arm. The utility model discloses through stepping on foot and foot board will drive connecting rod to go down, and then through the second gyro wheel and drive adjusting plate rotation, make first gyro wheel go up and push the sliding block and move in the limiting groove, the clamping block on sliding block is engaged with the toothing on extendable arm under the second spring effect, to drive extendable arm and move upwards, retract the clamping block through the inner block and push, disengage with the toothing, extendable arm realizes the stable drop under the action of gravity or external force, to realize the height accurate regulation of universal wheel, the structure not only adjusts rapidly, also need not to bend the waist and adjust, safe and reliable, improve overall use efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of adjustable support arms for casters, and in particular to an adjustable height support arm for casters. Background Technology

[0002] With the trend towards lightweight, modular, and mobile equipment, an increasing number of industrial, medical, and everyday devices are adopting mobile structures with casters to enhance their flexibility in different locations. Casters offer advantages such as compact structure, flexible steering, and easy propulsion, and are widely used in mobile devices such as medical beds, logistics trolleys, exhibition equipment, mobile instrument racks, experimental platforms, and photographic stands. Through casters, equipment can achieve omnidirectional movement and rapid positioning, significantly improving operational convenience and work efficiency.

[0003] Existing caster arm height adjustment methods mostly employ plug-in positioning structures or require manual adjustment of the arm position after lifting the equipment. These methods are inconvenient in practical use, requiring users to bend over to insert, unplug, and align the holes – a cumbersome, time-consuming, and labor-intensive process. This is especially problematic in scenarios involving heavy equipment or frequent adjustments, easily leading to operator fatigue. Furthermore, the adjustment accuracy is difficult to guarantee, failing to meet the actual needs of medical equipment, logistics trolleys, and shelves for fast, safe, and convenient adjustment. Therefore, it is necessary to design a more efficient and reliable adjustable height arm to solve these problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an adjustable height support arm for casters.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An adjustable height support arm for a swivel caster includes a support arm, an extendable arm slidably connected to the inner wall of the support arm, a swivel caster fixedly connected to the bottom of the support arm, a toothed groove on the side wall of the extendable arm, an adjusting plate rotatably connected to the side wall of the support arm, inner sliding grooves on both ends of the adjusting plate, a support plate fixedly connected to the side wall of the support arm, a first spring fixedly connected to the top of the support plate, a foot pedal fixedly connected to the top of the first spring, the foot pedal slidably connected to the side wall of the support arm, a connecting rod fixedly connected to the side wall of the foot pedal, a second roller rotatably connected to the top of the connecting rod, the second roller slidably connected to an inner sliding groove on one side of the adjusting plate, a limiting groove on the side wall of the support arm, a first roller slidably connected to an inner sliding groove on the other end of the adjusting plate, a sliding block provided on the side wall of the first roller, the sliding block slidably connected between the inner walls of the limiting groove, and a locking block for engaging with the toothed groove slidably connected to the inner wall of the sliding block.

[0007] As a further embodiment of this utility model, the top of the sliding block is provided with a through groove, the through groove and the interior of the sliding block are interconnected, and an inward block is slidably connected to the inner wall of the through groove, the bottom end of the inward block is fixedly connected to the top of the locking block.

[0008] As a further embodiment of this utility model, the top of the extension arm is fixedly connected to a mounting base for mounting the support arm and the extension arm.

[0009] As a further embodiment of this utility model, the top of the foot pedal is provided with an anti-slip groove to prevent the user's foot from slipping.

[0010] As a further embodiment of this utility model, the bottom of the card block has an arc-shaped structure.

[0011] As a further embodiment of this utility model, a second spring is fixedly connected between the side wall of the card block and the inner wall of the sliding block.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In this invention, stepping on the foot pedal causes the connecting rod to move downwards, which in turn causes the adjusting plate to rotate via the second roller. This causes the first roller to move upwards and push the sliding block to move within the limiting groove. The locking block on the sliding block engages with the toothed groove on the extension arm under the action of the second spring, thereby causing the extension arm to move upwards and completing the raising operation. When it is necessary to lower the height, the locking block is pushed back by the retracting block, disengaging from the toothed groove. The extension arm then descends smoothly under its own weight or external force, thus achieving precise height adjustment of the caster wheels. This structure not only allows for rapid adjustment but also eliminates the need to bend over for adjustment, ensuring safety and reliability and improving overall efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an adjustable height support arm for a universal wheel proposed in this utility model;

[0015] Figure 2 This is a schematic diagram of the overall planar structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the foot pedal and adjustment plate structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the sliding block and locking block structure of this utility model.

[0018] In the diagram: 1. Support arm; 2. Extension arm; 3. Caster wheel; 4. Tooth groove; 5. Adjustment plate; 6. Inner slide groove; 7. Support plate; 8. First spring; 9. Foot pedal; 10. Connecting rod; 11. First roller; 12. Sliding block; 13. Locking block; 14. Second spring; 15. Through groove; 16. Inner retraction block; 17. Second roller; 18. Limiting groove; 19. Mounting base. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Reference Figures 1-4An adjustable height support arm for a universal wheel includes a support arm 1, an extendable arm 2 slidably connected to the inner wall of the support arm 1, a universal wheel 3 fixedly connected to the bottom of the support arm 1, a toothed groove 4 on the side wall of the extendable arm 2, an adjusting plate 5 rotatably connected to the side wall of the support arm 1, inner sliding grooves 6 on both ends of the adjusting plate 5, a support plate 7 fixedly connected to the side wall of the support arm 1, a first spring 8 fixedly connected to the top of the support plate 7, a foot pedal 9 fixedly connected to the top of the first spring 8, the foot pedal 9 slidably connected to the side wall of the support arm 1, a connecting rod 10 fixedly connected to the side wall of the foot pedal 9, a second roller 17 rotatably connected to the top of the connecting rod 10, and the second roller 17 slidably connected in the inner sliding groove 6 on one side of the adjusting plate 5. A limiting groove 18 is provided in the wall. A first roller 11 is slidably connected in the inner slide groove 6 at the other end of the adjusting plate 5. A sliding block 12 is provided on the side wall of the first roller 11. The sliding block 12 is slidably connected between the inner walls of the limiting groove 18. A locking block 13 for engaging with the toothed groove 4 is slidably connected to the inner wall of the sliding block 12. When the user steps on the foot pedal 9, the foot pedal 9 squeezes the first spring 8 and moves downward, causing the connecting rod 10 connected to its side wall to move downward. The second roller 17 at the top of the connecting rod 10 slides in the inner slide groove 6 on one side of the adjusting plate 5, thereby causing the adjusting plate 5 to rotate around its rotation axis. The first roller 11 at the other end of the adjusting plate 5 slides upward in the inner slide groove 6 on the other side at the same time, and causes the sliding block 12 to move upward in the limiting groove 18 on the side wall of the support arm 1.

[0023] In this embodiment, a through groove 15 is provided on the top of the sliding block 12. The through groove 15 and the interior of the sliding block 12 are interconnected. An inward block 16 is slidably connected to the inner wall of the through groove 15. The bottom end of the inward block 16 is fixedly connected to the top of the locking block 13. A second spring 14 is fixedly connected between the side wall of the locking block 13 and the inner wall of the sliding block 12. When the locking block 13 on the sliding block 12 engages with the toothed groove 4 on the side wall of the extension arm 2 under the action of the second spring 14, it will synchronously drive the extension arm 2 to move upward, thereby adjusting the height of the extension arm 2.

[0024] In this embodiment, the top of the extension arm 2 is fixedly connected to a mounting base 19 for mounting the support arm 1 and the extension arm 2, which facilitates fixed connection with other equipment.

[0025] In this embodiment, the top of the foot pedal 9 is provided with an anti-slip groove to prevent the user from stepping on it, making it convenient for the user to step on and use.

[0026] In this embodiment, the bottom of the locking block 13 has an arc-shaped structure. The arc-shaped structure at the bottom of the locking block 13 allows it to be pressed into the sliding block 12 under the pressure of the tooth groove 4, thus avoiding jamming during the adjustment process.

[0027] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: When in use, stepping on the foot pedal 9 will drive the connecting rod 10 to move down, and then drive the adjusting plate 5 to rotate through the second roller 17, so that the first roller 11 moves up and pushes the sliding block 12 to move in the limiting groove 18. The locking block 13 on the sliding block 12 engages with the tooth groove 4 on the extension arm 2 under the action of the second spring 14, thereby driving the extension arm 2 to move upward and complete the lifting operation. At the same time, the bottom of the locking block 13 adopts an arc-shaped structure, which can be pressed into the sliding block 12 under the pressure of the tooth groove 4 to avoid jamming during the adjustment process.

[0028] When the height needs to be lowered, the inner block 16 pushes the locking block 13 to retract, disengaging it from the tooth groove 4. The extension arm 2 then descends smoothly under its own weight or external force, thereby achieving precise height adjustment of the caster wheel 3. This effectively avoids the problems of inconvenient insertion and removal, the need to bend over for adjustment, and the time and effort required in traditional structures, thus improving adjustment efficiency and safety.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An adjustable height support arm for a caster wheel, comprising a support arm (1), characterized in that, An extendable arm (2) is slidably connected to the inner wall of the support arm (1). A caster wheel (3) is fixedly connected to the bottom of the support arm (1). A toothed groove (4) is provided on the side wall of the extendable arm (2). An adjusting plate (5) is rotatably connected to the side wall of the support arm (1). An inner sliding groove (6) is provided on both sides of the adjusting plate (5). A support plate (7) is fixedly connected to the side wall of the support arm (1). A first spring (8) is fixedly connected to the top of the support plate (7). A foot pedal (9) is fixedly connected to the top of the first spring (8). The foot pedal (9) is slidably connected to the side wall of the support arm (1). A connecting rod (10) is fixedly connected to the side wall of the adjustment plate (5). A second roller (17) is rotatably connected to the top of the connecting rod (10). The second roller (17) is slidably connected in the inner groove (6) on one side of the adjustment plate (5). A limiting groove (18) is opened on the side wall of the support arm (1). A first roller (11) is slidably connected in the inner groove (6) at the other end of the adjustment plate (5). A sliding block (12) is provided on the side wall of the first roller (11). The sliding block (12) is slidably connected between the inner walls of the limiting groove (18). A locking block (13) for engaging with the tooth groove (4) is slidably connected to the inner wall of the sliding block (12).

2. The adjustable height support arm for a caster wheel according to claim 1, characterized in that, The top of the sliding block (12) is provided with a through groove (15), the through groove (15) and the interior of the sliding block (12) are interconnected, and the inner wall of the through groove (15) is slidably connected with an inward block (16), the bottom end of the inward block (16) is fixedly connected to the top of the card block (13).

3. The adjustable height support arm for a caster wheel according to claim 1, characterized in that, The top of the extension arm (2) is fixedly connected to a mounting base (19) for mounting the support arm (1) and the extension arm (2).

4. The adjustable height support arm for a caster wheel according to claim 1, characterized in that, The top of the footboard (9) is provided with anti-slip grooves to prevent the user's feet from slipping.

5. The adjustable height support arm for a caster wheel according to claim 1, characterized in that, The bottom of the card block (13) has an arc-shaped structure.

6. The adjustable height support arm for a caster wheel according to claim 1, characterized in that, A second spring (14) is fixedly connected between the side wall of the card block (13) and the inner wall of the sliding block (12).

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