Anti-roll stop

Abstract

The utility model relates to means of ensuring safety during the operation of vehicles and is intended to prevent spontaneous movement of the vehicle during parking, maintenance and repair. The wheel chock is designed as a wedge-shaped body with a base, side edges and an upper working surface. In the rear part of the base, a recess with supporting surfaces limiting longitudinal and transverse displacement is formed, in which a metal anti-skid plate is removable and mounted. The plate is provided with hooks in the form of bent elements, forming two rows in a staggered pattern: the hooks of the first row are made at an angle of (87 ± 3) ° to the plane of the plate, and those of the second row - at an angle of (103 ± 3) °. The body contains profiled stiffeners with localized thickenings in the areas of mating with the crossbars and walls, wherein at least one crossbar has an increased thickness.

Description

[0001] The utility model relates to the field of automotive engineering and means of ensuring safety during the operation of vehicles, in particular to portable wheel chocks designed to prevent spontaneous movement of a vehicle during parking, maintenance and repair.

[0002] Wedge-shaped wheel chocks are known, made of metal or polymer materials, and comprise a base, sidewalls, a working surface for contact with the tire, and a carrying handle. To improve traction, known solutions employ anti-slip elements, including metal plates or inserts with hooks.

[0003] A known anti-rollback stop contains a recess in the base for placing an anti-skid plate with hooks and fastening the plate with fastening elements (for example, Russian Federation patent for utility model RU 156681 U1, IPC B60T 3 / 00).

[0004] The disadvantages of known solutions of this type include limited maintainability of the anti-skid unit when the lugs wear out, requiring labor-intensive replacement or repair of the element, as well as insufficient technological certainty of positioning the metal plate in the seat during operation, including when exposed to longitudinal and transverse forces, as well as the lack of a structural orientation of the lugs, which provides increased holding capacity on hard and icy surfaces when multidirectional forces are applied.

[0005] The wheel chock is illustrated by drawings, where Fig. 1 shows the installation location of the metal plate, Fig. 2 shows the metal plate, and Fig. 3 shows the angles of the hooks of the first and second rows.

[0006] The technical problem is to create a wheel chock with increased shear resistance on hard and icy surfaces, ensuring reliable positioning of the anti-skid metal plate and increased operational maintainability, as well as with improved strength-mass characteristics of the body.

[0007] The technical result consists in increasing the resistance to shear of the stop in the longitudinal and transverse directions. The said technical result is achieved in that the anti-roll stop comprises a wedge-shaped body having a base, two side faces, an upper working surface, a rear face with a window and a handle, wherein in the rear part of the base there is a recess forming a seat in which a metal anti-slip plate is installed with the possibility of removal and replacement, wherein the recess is formed with supporting surfaces limiting the longitudinal and transverse displacement of the metal plate, and on the metal plate there are hooks in the form of bent elements forming two rows arranged in a staggered order, wherein the hooks of the first row are made at an angle of (87±3)° to the plane of the metal plate, and the hooks of the second row are made at an angle of (103±3)° to the plane of the metal plate.Angles of 87° and 103° were selected as two complementary lug inclinations relative to the plate plane, providing different interaction patterns with the supporting surface under multidirectional wheel forces. Lugs angled close to 90° (87±3)° act as "cutting" elements, primarily supporting crushing and shear loads, ensuring stable traction on hard and icy surfaces with a predominantly longitudinal force component. Lugs in the second row, angled differently from the right angle and directed in the opposite direction of the inclination (103±3)°, create asymmetry in shear resistance and ensure traction under opposing forces, as well as in the presence of a transverse component, since some of the lugs in each row are oriented more favorably to the direction of the resulting force.Thus, two rows of hooks with angles on opposite sides of 90° provide increased shear resistance when changing the direction of loading and when the surface is non-uniform. The ±3° tolerance is determined by the hook forming technology (stamping / bending) and ensures repeatable geometry during serial production without compromising functional properties. The thrust body is made of a polymer composite material, the stiffening ribs are profiled with localized thickenings in the areas of contact with the webs and / or body walls. The thickenings of the stiffening ribs extend to the supporting surface of the base, and at least one web is made with increased wall thickness.

[0008] The wheel chock is designed as a wedge-shaped body, including a base, side faces, an upper working surface, a rear face, a window, and a handle located in the said window. A recess is formed in the rear part of the base, forming a seat for a metal anti-skid plate. The recess is provided with support surfaces, which, when the plate is installed, limit its longitudinal and transverse displacement relative to the body. In a particular embodiment, the support surfaces include side guide surfaces and at least one stop surface, limiting the movement of the plate along the length of the body. The metal anti-skid plate is installed in the recess with the possibility of removal and replacement. The plate can be secured to the base using fasteners that interact with holes in the plate and mating fastening elements of the base (e.g., threaded holes, embedded elements, or holes for self-tapping fasteners).The plate is provided with hooks in the form of bent elements obtained by making cuts and then bending the corresponding sections of the plate material. The hooks form two rows arranged in a staggered pattern. The hooks of the first row are made at an angle of (87±3)° to the plane of the plate, and the hooks of the second row are made at an angle of (103±3)° to the plane of the plate. The angle values ​​​​are provided by technological equipment during stamping and / or bending of the hooks. The housing is made of a polymer material or a polymer composite material. In one embodiment, the housing contains internal stiffening ribs and crossbars. At least one stiffening rib is made profiled, wherein said rib has a reduced wall thickness compared to adjacent sections of the housing and is made with localized thickenings in the areas of mating of the rib with the crossbars and / or walls of the housing. In a particular embodiment, the thickenings of the stiffening ribs are extended to the supporting surface of the base.At least one bridge is made with increased wall thickness. The stop is used by placing the housing on the supporting surface and bringing the wheel to the upper working surface. Shear resistance is ensured by the engagement of the metal plate's hooks with the supporting surface, while the plate's position is maintained by the recess's supporting surfaces and fasteners. When the plate wears out, it is replaced by removing the fasteners and installing a new plate.

Claims

An anti-rollback stop comprising a wedge-shaped body having a base, side faces, an upper working surface, characterized in that a recess is made in the rear part of the base, into which a metal anti-slip plate is removably installed, wherein the recess is made with support surfaces that limit the longitudinal and transverse displacement of the metal plate, and on the metal plate there are hooks in the form of bent elements that form two rows arranged in a staggered order, wherein the hooks of the first row are made at an angle of 84° to 90° to the plane of the metal plate, and the hooks of the second row are made at an angle of 100° to 106° to the plane of the metal plate, wherein the stiffening rib is made profiled with local thickenings in the mating zones of the stiffening rib.

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