Folding trundle device

Abstract

A folding trundle device comprises a trundle seat and a trundle installed on the trundle seat, the trundle seat comprises two oppositely-arranged installation plates, an installation groove is formed between the two installation plates, a rotating shaft is arranged between the two installation plates, a first limiting groove is formed in one side of each installation plate, and a second limiting groove is formed in the other side of each installation plate; the trundle comprises a limiting assembly arranged in the mounting groove, a trundle frame connected with the limiting assembly and a wheel pivoted to the trundle frame, the limiting assembly comprises a connecting rod penetrating through the rotating shaft, a limiting plate arranged at one end of the connecting rod and a plug arranged at the other end of the connecting rod, and a spring is arranged at the position, between the plug and the rotating shaft, of the connecting rod; the limiting plate is matched with the first limiting groove and the second limiting groove. Movable connection of the trundles is achieved through cooperation of the springs, the limiting grooves and the limiting plates, rotating folding can be achieved by pulling the trundles, automatic resetting and fixing can be achieved by releasing the trundles, and folding operation is simple.

Description

TECHNICAL FIELD

[0001] The utility model relates to a folding trundle device. BACKGROUND

[0002] The folding trundle can save space, such as a folding trundle device disclosed in Chinese patent publication No. CN112319135A, which comprises a trundle (2), a wheel seat (3), a control mechanism (4), a rotating shaft (5), and a spring (6). The wheel seat (3) is fixed on a vehicle frame (1), the trundle (2) is provided with a roller and is inserted into the wheel seat (3), and is fixed on the vehicle frame (1) through the rotating shaft (5) and the control mechanism (4). The rotating shaft (5) penetrates the wheel seat (3) and the trundle (2). The control mechanism (4) is arranged at the second end of the trundle (2), and the wheel seat (3) is provided with a sliding rail groove (9) for the sliding of the control mechanism (4). The spring (6) is sleeved on the control mechanism (4), and the bottom of the control mechanism (4) is provided with a first limiting device for preventing the spring (6) from falling off the control mechanism (4). The second end of the trundle (2) is internally provided with a second limiting device for compressing the spring (6). The above-mentioned folding trundle is troublesome to operate, and a folding trundle with simpler operation needs to be designed. SUMMARY

[0003] The utility model solves the technical problem of providing a folding trundle device which is simple to operate.

[0004] To solve the above technical problems, the technical scheme of the utility model is as follows: a folding trundle device, which comprises a wheel seat and a trundle mounted on the wheel seat. The wheel seat comprises two oppositely arranged mounting plates, and an installation groove is formed between the two mounting plates. A rotating shaft is arranged between the two mounting plates. A first limiting groove is arranged on one side of the mounting plate, and a second limiting groove is arranged on the other side of the mounting plate. The trundle comprises a limiting assembly arranged in the installation groove, a wheel frame connected with the limiting assembly, and a wheel pivotally connected to the wheel frame. The limiting assembly comprises a connecting rod penetrating through the rotating shaft, a limiting plate arranged at one end of the connecting rod, and a plug arranged at the other end of the connecting rod. A spring is arranged between the plug and the rotating shaft on the connecting rod. The limiting plate is matched with the first limiting groove and the second limiting groove, respectively. The utility model principle: when in normal use state, the limiting plate is located in the first limiting groove, and the connecting rod is lifted upward and tightly constrained in the first limiting groove by the elastic force of the spring, so that the trundle can be normally used. When the trundle needs to be folded, the trundle is pulled outward, the trundle drives the connecting rod outward and compresses the spring, and when the limiting plate leaves the first limiting groove, the trundle and the connecting rod are rotated by the rotating shaft, and when the limiting plate reaches the position of the second limiting groove, the trundle is released, and the trundle and the connecting rod are reset under the elastic force of the spring, and the limiting plate is matched with the second limiting groove.

[0005] As an improvement, one end of the connecting rod is connected with the wheel frame after penetrating through the limiting plate.

[0006] As an improvement, the two mounting plates are connected to form an integral body through the connecting plate.

[0007] As an improvement, the first limiting groove and the second limiting groove are located on two adjacent sides of the mounting plate.

[0008] As an improvement, a transition inclined surface is arranged on the mounting plate between the first limiting groove and the second limiting groove.

[0009] As an improvement, the plane where the first limiting groove is located is perpendicular to the plane where the second limiting groove is located.

[0010] As an improvement, the rotating shaft is perpendicular to the connecting rod, a through hole for the connecting rod to pass through is arranged at the middle position of the rotating shaft, and the two ends of the rotating shaft are rotatably connected with the mounting plate through the pin shaft.

[0011] The beneficial effects brought by the present application compared with the prior art are:

[0012] The spring, the limiting groove and the limiting plate are matched to realize the movable connection of the caster, the caster can be rotated and folded by pulling, and the caster can be automatically reset and fixed by releasing, and the folding operation is simple. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 is a normal use state diagram of the caster.

[0014] Fig. 2 is a state diagram of the folding process of the caster.

[0015] Fig. 3 is a state diagram of the caster after folding.

[0016] Fig. 4 is a perspective view of the caster. DETAILED DESCRIPTION

[0017] The present application will be further described below in conjunction with the drawings of the specification.

[0018] For example, Figs. 1 to 4As shown, a folding trolley device can be applied to a trolley case, which comprises a wheel seat and a trolley wheel mounted on the wheel seat, and the trolley wheel is folded with the wheel seat. The wheel seat comprises two oppositely arranged mounting plates 1, which are connected to form an integral structure through a connecting plate to ensure the structural strength of the wheel seat; an installation groove is formed between the two mounting plates 1, and a rotating shaft 7 is arranged between the two mounting plates 1, the rotating shaft 7 is perpendicular to the mounting plate 1, a through hole is arranged at the middle position of the rotating shaft 7, and the two ends of the rotating shaft 7 are rotatably connected to the mounting plate 1 through a pin shaft; a first limiting groove 5 is arranged on one side of the mounting plate 1, a second limiting groove 2 is arranged on the other side of the mounting plate 1, the first limiting groove 5 and the second limiting groove 2 are located on the two adjacent sides of the mounting plate 1, that is, the plane where the first limiting groove 5 is located is perpendicular to the plane where the second limiting groove 2 is located; a transition inclined surface 3 is arranged on the mounting plate 1 between the first limiting groove 5 and the second limiting groove 2, and the included angle between the transition inclined surface 3 and the first limiting groove 5 and the second limiting groove 2 is 45 degrees. The trolley wheel comprises a limiting assembly arranged in the installation groove, a wheel frame 10 connected with the limiting assembly, and a wheel 11 pivotally connected to the wheel frame 10; the limiting assembly comprises a connecting rod 6 penetrating through the through hole of the rotating shaft 7, a limiting plate 4 arranged at one end of the connecting rod 6, and a plug 9 arranged at the other end of the connecting rod 6; the connecting rod 6 is perpendicular to the rotating shaft 7 and can slide in and out of the through hole, a spring 8 is arranged on the connecting rod 6 between the plug 9 and the rotating shaft 7, when the connecting rod 6 is pulled outwards, the plug 9 compresses the spring 8, and when the pulling force of the connecting rod 6 is released, the spring 8 drives the connecting rod 6 to reset and contract; one end of the connecting rod 6 is connected with the wheel frame 10 after penetrating through the limiting plate 4, and the limiting plate 4 is matched with the first limiting groove 5 and the second limiting groove 2 respectively, when the limiting plate 4 is in the first limiting groove 5 or the second limiting groove 2, the limiting plate 4 is constrained to lock the connecting rod 6 and the trolley wheel.

[0019] The utility model principle: when normal use state, the limiting plate 4 is located in the first limiting groove 5, relies on the spring 8's elastic force, makes the connecting rod 6 upward and tight constraint limiting plate 4 in the first limiting groove 5, the trolley wheel can normal use at this moment, when needing to fold the trolley wheel, pulls outwards the trolley wheel, the trolley wheel drives the connecting rod 6 outward and compresses the spring 8, when the limiting plate 4 leaves the first limiting groove 5, relies on the rotating shaft 7 to rotate the trolley wheel and the connecting rod 6, when the limiting plate 4 reaches the second limiting groove 2 position, releases the trolley wheel, and the trolley wheel and the connecting rod 6 reset under the elastic force of the spring 8, and the limiting plate 4 is matched with the second limiting groove 2.

Claims

1. A folding caster arrangement comprising a caster mount and a caster mounted on the caster mount, characterised in that: The wheel seat comprises two oppositely arranged mounting plates, a mounting groove is formed between the two mounting plates, a rotating shaft is arranged between the two mounting plates, a first limiting groove is arranged on one side of the mounting plate, and a second limiting groove is arranged on the other side of the mounting plate; the caster comprises a limiting assembly arranged in the mounting groove, a wheel frame connected with the limiting assembly, and a wheel pivotally connected to the wheel frame, the limiting assembly comprises a connecting rod penetrating through the rotating shaft, a limiting plate arranged at one end of the connecting rod, and a plug arranged at the other end of the connecting rod, a spring is arranged on the connecting rod between the plug and the rotating shaft, and the limiting plate is matched with the first limiting groove and the second limiting groove respectively.

2. A folding caster device as defined in claim 1, wherein: One end of the connecting rod is connected with the wheel frame after penetrating through the limiting plate.

3. A folding caster device as defined in claim 1, wherein: The two mounting plates are connected by a connecting plate to form an integral body.

4. A folding caster device as defined in claim 1, wherein: The first limiting groove and the second limiting groove are located on the two adjacent sides of the mounting plate.

5. A folding caster device as defined in claim 4, wherein: A transition inclined surface is arranged on the mounting plate between the first limiting groove and the second limiting groove.

6. A folding caster device as defined in claim 4, wherein: The plane where the first limiting groove is located is perpendicular to the plane where the second limiting groove is located.

7. A folding caster device as defined in claim 1, wherein: The rotating shaft is perpendicular to the connecting rod, a through hole is arranged in the middle position of the rotating shaft for the connecting rod to penetrate through, and the two ends of the rotating shaft are rotatably connected with the mounting plate through a pin shaft.

Images