A foldable wheel stop

Abstract

This utility model provides a foldable wheel stop, belonging to the field of logistics equipment technology. It solves the technical problem of existing foldable wheel stops being difficult and inconvenient to install. This foldable wheel stop includes a front support leg, a rear support leg, and a pull rod. The front support leg is rectangular, while the rear support leg and pull rod are both rod-shaped. One end of the pull rod is hinged to the lower part of the front support leg, and the other end is fixedly connected to a vertically arranged cylindrical insert sleeve. The lower end of the rear support leg is fixedly connected to a horizontally arranged positioning base plate. The lower end of the insert sleeve is positioned and inserted into a through hole in the positioning base plate. A U-shaped limiting plate with its opening facing forward and downward is fixed to the rear side of the upper part of the front support leg. The upper end of the rear support leg is rotatably connected between the two vertical side walls of the limiting plate, and the rear support leg can be positioned and abutted against the rear side wall of the limiting plate. This foldable wheel stop combines stability and ease of use.

Description

Technical Field

[0001] This utility model belongs to the field of logistics equipment technology and relates to a foldable wheel stop. Background Technology

[0002] When vehicles are transported by flatbed wagon or rail, wheel chocks are used to secure the vehicle's tires, thereby ensuring the vehicle's stability during transport.

[0003] For example, the patent disclosed in authorization announcement number CN204222832U discloses a foldable car wheel stop, in which a crossbar is welded between the bottom of the two front support legs, pin holes are provided at the bottom of the two front support legs, a base is provided at the bottom of the two front support legs, anti-slip nails are provided on the lower surface of the base, a cross plate is welded between the top surface of the two front support legs, connecting blocks are provided on the top and bottom surfaces of the two front support legs, pin holes are provided at the left ends of the two pull rods, and the left ends of the two pull rods are respectively hinged to the pin holes at the bottom of the front support legs by pin shafts, cylindrical nail holes are welded to the right ends of the two pull rods, and the two rear support legs are respectively hinged to the connecting blocks on the top and bottom surfaces of the two front support legs by pin shafts, the bottom of the two rear support legs is welded to the base plate, and nail holes are provided at both ends of the base plate, with large cap nails inserted into the cylindrical nail holes.

[0004] The aforementioned tire stopper provides a stable wheel stop function, but it still has some shortcomings: when tightening, the user needs to precisely adjust the angle of the rear outrigger to align the nail holes on the base plate with the cylindrical nail holes on the tie rod, and then insert the large cap nail to achieve a stable triangular structure, which makes the installation difficult and inconvenient. Summary of the Invention

[0005] This utility model addresses the aforementioned problems in existing technologies by providing a foldable wheel stop. The technical problem this utility model aims to solve is: how to balance the stability and ease of use of the wheel stop.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A foldable wheel stop includes a front support leg, a rear support leg, and a pull rod. The front support leg is rectangular, and both the rear support leg and the pull rod are rod-shaped. One end of the pull rod is hinged to the lower part of the front support leg, and the other end of the pull rod is fixedly connected to a vertically arranged cylindrical insert sleeve. The lower end of the rear support leg is fixedly connected to a horizontally arranged positioning base plate, and the lower end of the insert sleeve is positioned and inserted into a through hole in the positioning base plate. The front support leg has a U-shaped limiting plate fixed to its upper rear side, with the opening facing forward and downward. The upper end of the rear support leg is rotatably connected between the two vertical side walls of the limiting plate, and the rear support leg can be positioned and abutted against the rear side wall of the limiting plate.

[0008] By setting a chamfered limiting plate with its opening facing forward and downward, the upper end of the rear outrigger is rotatably connected to the limiting plate and can be positioned to abut against the rear side wall of the limiting plate. When deployed, the rear outrigger opens backward and abuts against the rear side wall of the limiting plate, indicating that the rear outrigger is basically in the correct position. The specific position can be set so that the rear outrigger is just in the correct position when it abuts against the limiting plate, or it only needs to be swung back a slight angle. There is no need for the operator to precisely control the opening angle. Then, by swinging the pin sleeve at the other end of the lever downward, the lower end of the pin sleeve will fall into the through hole range of the positioning base plate. It can be inserted directly or with only minor adjustments, without the need for strenuous alignment, greatly improving the convenience of use. At the same time, during use, if the rear side wall of the limiting plate abuts against the rear outrigger, it can also provide further limiting constraints to ensure the stability of the rear outrigger, taking into account both the stability of the wheel chock and the ease of use.

[0009] In the aforementioned foldable wheel chock, the upper ends of the rear support legs have outwardly protruding annular bosses on both sides, which are opposite to the side walls of the limiting plate. The rear support legs are rotatably connected to the limiting plate via pins passing through the annular bosses. These annular bosses increase the contact area with the pin support, preventing excessive concentration of the load on the pin and thus avoiding damage to the pin or the rear support legs. Simultaneously, the annular bosses also reduce the friction area between the sides of the rear support legs and the limiting plate, preventing excessive swing resistance and ensuring smooth operation.

[0010] In the aforementioned foldable wheel stop, a vertically positioned large cap nail is inserted into the insert sleeve. This large cap nail is a self-drilling, self-tapping screw. By using an existing self-drilling, self-tapping screw, operators do not need to pre-drill holes in the underlying sleeper. They can directly rotate the large cap nail on-site. The large cap nail can be drilled at any position on the sleeper to form a thread, ensuring a stable lock-on and thus fixing the insert sleeve. This ensures structural stability and makes operation more convenient.

[0011] In the aforementioned foldable wheel stopper, the upper end of the insert sleeve is constricted. This allows the sleeper debris drilled from the lower end of the insert sleeve to be stored inside the sleeve, while ensuring that the insert sleeve provides positioning constraints for the installation of the large cap nail. This prevents the debris from obstructing the normal installation of the large cap nail and ensures smooth installation.

[0012] In the aforementioned foldable wheel stop, the lower outer edge of the insert sleeve is chamfered. This facilitates guidance when the insert sleeve is inserted into the through hole of the positioning base plate, making operation smoother.

[0013] In the aforementioned foldable wheel stop, the lower side of the positioning base plate has several downward-arching anti-slip protrusions. These anti-slip protrusions are hemispherical and have a rearward-facing blocking plane. This increases the overall strength of the anti-slip protrusions, making them less prone to tilting under stress and ensuring their service life. Simultaneously, the blocking plane can provide a rearward limit after the anti-slip protrusion is embedded in the surface of the sleeper.

[0014] Compared with the prior art, the advantages of this utility model are as follows:

[0015] When this foldable wheel stop is unfolded, the rear outriggers open backward and abut against the rear side wall of the limiting plate, indicating that the rear outriggers are fully extended. There is no need for the operator to precisely control the opening angle. Then, by operating the other end of the lever to swing the pin sleeve downward, the lower end of the pin sleeve will fall into the through hole range of the positioning base plate. It can be inserted directly or with only minor adjustments, without the need for strenuous alignment. This combination ensures both the stability and ease of use of the wheel stop. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of this embodiment.

[0017] Figure 2 This is a top view of the structure of this embodiment.

[0018] Figure 3 yes Figure 2 A schematic diagram of the AA cross section.

[0019] Figure 4 This is a three-dimensional structural diagram of the front support leg and the limiting plate in this embodiment.

[0020] Figure 5 This is a three-dimensional structural diagram of the rear support leg and positioning base plate in this embodiment.

[0021] Figure 6 This is a three-dimensional structural schematic diagram from another perspective of this embodiment.

[0022] Figure 7 yes Figure 6 Enlarged view of part B in the image.

[0023] Figure 8 This is a three-dimensional structural diagram of the pull rod and the pin sleeve in this embodiment.

[0024] In the diagram, 1 is the front support leg; 2 is the rear support leg; 21 is the annular boss; 3 is the tie rod; 4 is the pin sleeve; 5 is the positioning base plate; 51 is the through hole; 52 is the anti-slip protrusion; 521 is the blocking plane; 6 is the limiting plate; 7 is the pin shaft; and 8 is the large cap nail. Detailed Implementation

[0025] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0026] like Figure 1 , Figure 2 As shown, this foldable wheel chock includes a front support leg 1, two rear support legs 2, and two pull rods 3. The front support leg 1 is rectangular, while the rear support legs 2 and pull rods 3 are rod-shaped. The two pull rods 3 and the rear support legs 2 are spaced apart along the width direction of the front support leg 1. Vertically arranged cylindrical insert sleeves 4 are welded and fixed to the rear ends of each pull rod 3. A horizontally arranged positioning base plate 5 is welded and fixed to the lower end of each rear support leg 2. The lower end of the insert sleeve 4 is positioned and inserted into the two through holes 51 of the positioning base plate 5.

[0027] like Figure 3-5 As shown, one end of the pull rod 3 is hinged to the lower part of the front support leg 1. Two U-shaped limiting plates 6 with their openings facing forward and downward are fixed to the rear side of the upper part of the front support leg 1. The upper end of the rear support leg 2 is rotatably connected between the two vertical side walls of the limiting plate 6. The upper edge of the rear support leg 2 is chamfered and rounded to avoid interference with the limiting plate 6 and the front support leg 1 during rotation. The rear support leg 2 has only a gap with the rear side wall of the limiting plate 6. The cross-section of the rear support leg 2 is U-shaped, and the two side walls of the rear support leg 2 are opposite to the two side walls of the limiting plate 6. The upper end of the rear support leg 2 has annular bosses 21 that protrude outward and are opposite to the two side walls of the limiting plate 6. The rear support leg 2 is rotatably connected to the limiting plate 6 via a pin 7 that passes through the annular bosses 21.

[0028] like Figure 6 , Figure 7 As shown, a vertically arranged large cap screw 8 is inserted into the screw sleeve 4. The large cap screw 8 is an existing self-drilling self-tapping screw. The lower outer edge of the screw sleeve 4 is chamfered. The lower side of the positioning base plate 5 has several downward arched anti-slip protrusions 52. The anti-slip protrusions 52 are hemispherical and have a rearward blocking plane 521.

[0029] like Figure 8 As shown, the upper end of the insert sleeve 4 is constricted.

[0030] In use, spread the rear support leg 2 backwards so that the front support leg 1 and the rear support leg 2 form an A-shape. Spread the rear support leg 2 backwards until it abuts against the rear side wall of the limiting plate 6 and swing it back and forth slightly. Then control the pull rod 3 to swing down so that the pin sleeve 4 is aligned with the through hole 51 of the positioning base plate 5. Finally, insert the large cap nail 8 into the pin sleeve 4 and tighten it with the sleeper below. Then fix the positioning base plate 5 to the sleeper below with the pin or the large cap nail 8 to complete the installation.

[0031] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A foldable wheel stopper, comprising a front leg (1), a rear leg (2) and a pull rod (3), the front leg (1) is in the shape of a rectangular frame, the rear leg (2) and the pull rod (3) are both in the shape of a rod, one end of the pull rod (3) is hingedly connected to the lower part of the front leg (1), the other end of the pull rod (3) is fixedly connected with a vertically arranged cylindrical plug sleeve (4), the lower end of the rear leg (2) is fixedly connected with a horizontally arranged positioning bottom plate (5), the lower end of the plug sleeve (4) is positioned and inserted into the through hole (51) of the positioning bottom plate (5), characterized in that, The rear side of the upper part of the front support leg (1) is fixed with a C-shaped limiting plate (6) with an opening facing forward and downward. The upper end of the rear support leg (2) is rotatably connected between the two vertical side walls of the limiting plate (6). The rear support leg (2) can be limited and abutted against the rear side wall of the limiting plate (6) when facing backward.

2. The foldable wheel stop according to claim 1, characterized in that, The upper end of the rear support leg (2) has annular protrusions (21) on both sides that protrude outward and are opposite to the side walls of the limiting plate (6). The rear support leg (2) is rotatably connected to the limiting plate (6) via a pin (7) that passes through the annular protrusions (21).

3. The foldable wheel stop according to claim 1 or 2, characterized in that, The insert sleeve (4) is fitted with a vertically arranged large cap nail (8), which is a self-drilling and self-tapping nail.

4. The foldable wheel stop according to claim 3, characterized in that, The upper end of the insert sleeve (4) is constricted.

5. The foldable wheel stop according to claim 3, characterized in that, The lower outer edge of the insert sleeve (4) is chamfered.

6. The foldable wheel stop according to claim 1 or 2, characterized in that, The lower side of the positioning base plate (5) has several downward arched anti-slip protrusions (52), which are hemispherical and have a rearward blocking plane (521).

Images