Foldable trundle

Abstract

The utility model discloses a foldable caster, which relates to the technical field of casters and comprises a storage box, a rotating rod is rotatably mounted at the front end in the storage box, two connecting plates are mounted on the outer wall of the rotating rod in the storage box, a caster body is mounted at the bottom ends of the connecting plates, and the foldable caster further comprises a clamping rod and a porous clamping plate which are used for limiting and fixing the caster body. A driven worm wheel is mounted on the outer wall of the rotating rod between the connecting plates, a worm is rotatably mounted on one side of the interior of the storage box, a rotary knob is mounted at one end of the worm, a limiting plate is mounted at the rear end of the rotating rod, a fixing spring is mounted at the front end of the limiting plate, and a porous clamping plate is mounted at the front end of the fixing spring. According to the trundle, under the counter-acting force of the fixing spring, the porous clamping plate gets close to the clamping rod, the clamping rod is inserted into the hole in the porous clamping plate, the trundle body is fixed, and according to the structure, under the action of the clamping rod and the porous clamping plate, the trundle body is fixed through the rotating rod, and shaking or deviation is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of trundle, concretely is a foldable trundle. BACKGROUND

[0002] The history of trundle can be traced back to ancient times, when people installed some round logs or stones at the bottom of objects for the convenience of carrying heavy objects, which can be regarded as the prototype of trundle. With the passage of time, people gradually improved the logs into wheels with shafts, making the movement of objects more convenient and stable. Early trundles were mainly made of wood and had simple structure, which were used for some basic transportation and movement needs. According to different use needs, the structure design of trundle is constantly innovated. Early trundles are mostly single-wheel structures, suitable for the movement of some small objects. With the increase of object weight and size, multi-wheel structure trundles gradually appear, such as two-wheel, three-wheel, four-wheel trundles, which can better disperse weight and improve stability and carrying capacity.

[0003] The foldable trundle is a trundle with foldable function, which can be folded when needed, does not occupy space, and is convenient to carry and transport. However, during folding and unfolding, there may be some gaps or movements at the structure connection parts of the foldable trundle. When the object is impacted by a large external force or uneven road surface during movement, these gaps may cause the trundle to shake or deviate, affecting the stability and straightness of the object movement. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a foldable trundle to solve the problem of trundle shaking or deviation caused by gaps during folding and unfolding as mentioned in the background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a foldable trundle, comprising a storage box, a rotating rod is rotatably installed at the front end inside the storage box, two connecting plates are installed on the outer wall of the rotating rod inside the storage box, a trundle main body is installed at the bottom end of the connecting plate, and a clamping rod and a multi-hole clamping plate are used to limit and fix the trundle main body.

[0006] A driven worm wheel is installed on the outer wall of the rotating rod between the connecting plates, a worm gear is rotatably installed on one side inside the storage box, a knob is installed at one end of the worm gear, a limiting plate is installed at the rear end of the rotating rod, a fixed spring is installed at the front end of the limiting plate, a multi-hole clamping plate is installed at the front end of the fixed spring, and a plurality of clamping rods are installed at the rear end of the storage box.

[0007] Preferably, the rear end of the rotating rod passes through the storage box, and the rear end of the rotating rod extends to the rear of the storage box.

[0008] Preferably, the porous card plate is sleeved on the outer wall of the rotating rod, and the clamping rod is matched with the holes on the porous card plate.

[0009] Preferably, one end of the worm rod passes through the storage box, and the other end of the worm rod extends to one side of the storage box.

[0010] Preferably, the driven worm wheel is located below the worm rod, and the worm rod and the driven worm wheel are engaged with each other.

[0011] Preferably, the rotating rod is a square rod, and the porous card plate can rotate with the rotating rod.

[0012] Compared with the prior art, the utility model has the beneficial effects that: the porous card plate is pulled, the porous card plate slides on the outer wall of the rotating rod to the direction of the limiting plate, and the fixed spring is compressed, the knob drives the worm rod to rotate, the worm rod can drive the driven worm wheel to rotate, the driven worm wheel drives the connecting plate and the caster main body, the caster main body is stored in the inside of the storage box, then the porous card plate is loosened, under the reaction force of the fixed spring, the porous card plate approaches the direction of the clamping rod, and the clamping rod is inserted into the hole on the porous card plate, and the caster main body is fixed, the structure is fixed through the clamping rod and the porous card plate, and the caster main body is prevented from shaking or deviating. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a three-dimensional sectional view structure schematic diagram of the utility model;

[0014] Figure 2 It is a three-dimensional sectional view structure schematic diagram of the utility model in the folded state;

[0015] Figure 3 It is a three-dimensional structure schematic diagram of the utility model in the second perspective;

[0016] Figure 4 It is a front view sectional view structure schematic diagram of the utility model;

[0017] Figure 5 It is a bottom view structure schematic diagram of the utility model;

[0018] Figure 6 It is a front view enlarged structure schematic diagram of the porous card plate of the utility model.

[0019] In the drawing: 1, connecting plate; 2, caster main body; 3, limiting plate; 4, storage box; 5, driven worm wheel; 6, worm rod; 7, rotating rod; 8, knob; 9, clamping rod; 10, fixed spring; 11, porous card plate. DETAILED DESCRIPTION

[0020] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0021] Embodiment 1: Please refer to Figures 1-6 A foldable caster includes a storage box 4, a rotating rod 7 is rotatably installed at the front end inside the storage box 4, two connecting plates 1 are installed on the outer wall of the rotating rod 7 inside the storage box 4, a caster main body 2 is installed at the bottom end of the connecting plate 1, and a clamping rod 9 and a multi-hole clamping plate 11 are further included for limiting and fixing the caster main body 2.

[0022] A driven worm wheel 5 is installed on the outer wall of the rotating rod 7 between the connecting plates 1, a worm gear 6 is rotatably installed on one side inside the storage box 4, a knob 8 is installed at one end of the worm gear 6, a limiting plate 3 is installed at the rear end of the rotating rod 7, a fixing spring 10 is installed at the front end of the limiting plate 3, the multi-hole clamping plate 11 is installed at the front end of the fixing spring 10, and a plurality of clamping rods 9 are installed at the rear end of the storage box 4.

[0023] The rear end of the rotating rod 7 penetrates the storage box 4, and the rear end of the rotating rod 7 extends to the rear of the storage box 4.

[0024] The multi-hole clamping plate 11 is sleeved on the outer wall of the rotating rod 7, and the clamping rod 9 and the hole on the multi-hole clamping plate 11 are matched with each other.

[0025] One end of the worm gear 6 penetrates the storage box 4, and one end of the worm gear 6 extends to one side of the storage box 4.

[0026] The driven worm wheel 5 is located below the worm gear 6, and the worm gear 6 and the driven worm wheel 5 are meshed with each other.

[0027] The rotating rod 7 is a square rod, and the multi-hole clamping plate 11 can rotate with the rotation of the rotating rod 7.

[0028] Specifically, as shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , when using the mechanism, the knob 8 drives the worm gear 6 to rotate, since the worm gear 6 and the driven worm wheel 5 are meshed with each other, the worm gear 6 can drive the driven worm wheel 5 to rotate, the driven worm wheel 5 drives the rotating rod 7 to rotate, the rotating rod 7 drives the connecting plate 1 and the caster main body 2, and the caster main body 2 is stored into the inside of the storage box 4.

[0029] Working principle: the staff pulls the multi-hole card plate 11, makes the multi-hole card plate 11 slide in the direction of the limiting plate 3 on the outer wall of the rotating rod 7, and makes the fixed spring 10 compress, then rotates the knob 8, drives the worm 6 to rotate through the knob 8, because the worm 6 and the driven worm wheel 5 are mutually engaged, the driven worm wheel 5 can be driven to rotate through the worm 6, the driven worm wheel 5 drives the rotating rod 7 to rotate, the rotating rod 7 drives the connecting plate 1 and the caster main body 2, makes the caster main body 2 be received into the inside of the receiving box 4, then the staff can loosen the multi-hole card plate 11, under the reaction force of the fixed spring 10, makes the multi-hole card plate 11 close to the direction of the clamping rod 9, and makes the clamping rod 9 insert into the hole on the multi-hole card plate 11, fixes the caster main body 2.

[0030] It is obvious for those skilled in the art that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point, the embodiments should be regarded as exemplary and non-restrictive, the scope of the utility model is defined by the appended claims instead of the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the involved claims.

Claims

1. A foldable caster, comprising a storage box (4), a rotating rod (7) is rotatably installed at the front end inside the storage box (4), and two connecting plates (1) are installed on the outer wall of the rotating rod (7) inside the storage box (4), a caster main body (2) is installed at the bottom end of the connecting plate (1), characterized in that: The connecting plate (1) is provided with a limiting plate (3) at the rear end of the rotating rod (7), a fixed spring (10) is arranged at the front end of the limiting plate (3), a multi-hole clamping plate (11) is arranged at the front end of the fixed spring (10), and a plurality of clamping rods (9) are arranged at the rear end of the receiving box (4). The rear end of the rotating rod (7) penetrates through the receiving box (4), and the rear end of the rotating rod (7) extends to the rear of the receiving box (4).

2. The foldable caster of claim 1, wherein: The multi-hole clamping plate (11) is sleeved on the outer wall of the rotating rod (7), and the clamping rod (9) and the hole on the multi-hole clamping plate (11) are matched with each other.

3. The foldable caster of claim 1, wherein: One end of the worm (6) penetrates through the receiving box (4), and one end of the worm (6) extends to one side of the receiving box (4).

4. The foldable caster of claim 1, wherein: The driven worm wheel (5) is located below the worm (6), and the worm (6) and the driven worm wheel (5) are engaged with each other.

5. The foldable caster of claim 1, wherein: The rotating rod (7) is a square rod, and the multi-hole clamping plate (11) can rotate with the rotation of the rotating rod (7).

6. The foldable caster of claim 1, wherein: The connecting plate (1) is provided with a limiting plate (3) at the rear end of the rotating rod (7), a fixed spring (10) is arranged at the front end of the limiting plate (3), a multi-hole clamping plate (11) is arranged at the front end of the fixed spring (10), and a plurality of clamping rods (9) are arranged at the rear end of the receiving box (4).

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