RU2808656C1 - Lever protective screen - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: invention can be used as protection for various moving mechanisms that contain rods, levers or handles that perform spatial movements. A protective shield for the lever is proposed, which consists of a plurality of flat segments movable relative to each other. Each segment has a hole in the centre. The segments are installed overlapping each other. Moreover, each subsequent segment is smaller in size than the previous one. The size of the hole in each segment is larger than the size of the hole in the next segment in decreasing order, but smaller than the size of the next segment. The segments are connected by scissor mechanisms such that each segment is secured at the cross-connection of the scissor mechanism supports.

EFFECT: creation of a durable, rigid and movable design of a protective screen with two degrees of freedom, which provides safety and protection from unauthorized access to the mechanisms of the lever (handle, rod), which has up to six degrees of freedom.

2 cl, 6 dwg

Description

The invention relates to the field of mechanical engineering and can be used as protection for various moving mechanisms that contain rods, levers or handles that perform spatial movements.

Protective covers are known according to patents RU24522 (published on August 10, 2002), RU26256 (published on November 20, 2002), and RU139524 (published on October 9, 2013), which are installed on an articulated lever. The covers have connecting sections, one of which is attached directly to the lever, and the other to the body.

The disadvantage of such solutions is that such covers do not provide much movement, so they are mainly used on articulated levers, for example, on gearbox levers in cars. In addition, such covers must be made of easily deformable material, which does not provide sufficient protection, and over time such material wears out, tears, and cracks.

Various designs of sliding telescopic protective covers are known according to the patents SU1154073 (published on 05/07/1985), RU2378100 (published on 09/20/2007), CN103586733 (published on 02/19/2014), US6419002 (published on 07/16/2002 ), JP4890596 (publ. 03/07/2012), EP0963809 (published 10/04/2001), EP2882569 (published 07/27/2016), which contain many plates connected by a scissor mechanism with the possibility of telescopic folding.

The disadvantage of the known technical solutions is that they provide only linear movement of the plates in one direction. These designs are not able to provide sufficient protection for levers, handles, and rods.

A device is known for protecting machine guides, which contains telescopic shields mounted on fixed guides by means of support elements, which in each shield are made one in the form of a bracket with rollers, and the other in the form of a strip. The supporting element with the bracket is equipped with a strip along the entire length of the shield, interacting with the C-shaped fence guide, on the lower inner surface of which there is a V-shaped groove, with which a spherical spring-loaded roller installed in the bracket interacts. At the bottom, under a set of telescopic shields, a tape that rolls into a roll is installed (according to patent RU2009828, class B23Q 11/00, published 03/30/1994).

The disadvantage of this device is that it provides protection only when the calipers move linearly.

A lid for a storage space is known that provides access to a selected portion thereof, comprising means for creating at least one opening that can be configured and located anywhere on the lid, the opening of which provides access to a limited area of the storage space (according to the patent US6848491B2, E06B 9/08, published 02/01/2005).

The disadvantage of this cover is that it is made of flexible thin material.

A covering and protective device for machines and systems is known, in which a plurality of covering elements in the form of strips are connected to each other in a sliding manner, one after the other, which can be expanded and shortened in a given direction. According to an embodiment, the covering elements can be located in the same plane on four sides of the hole, ensuring its movement along two axes (according to patent EP1728588A1, B23Q 11/08, published 12/06/2006).

A protective cover is known for an area of a machine with moving parts, in which the machine contains a movable workpiece that moves along a working path, preferably passing in one plane. The protective coating contains a first set of coating elements in the form of strips that are connected to the workpiece in such a way that they can move away from each other to cover the area and overlap each other along the path of the workpiece, and a second set of coating elements that are connected to workpiece so that they can move, moving away from each other to cover the area and overlapping each other along a workpiece path that is different from the path of the first set of coating elements, so that when the workpiece moves along its work path, it pulls the first and second coating means along a corresponding path, ensuring that the area to be coated remains closed (according to patent US6260438B, B23Q 11/08, publ. 07.17.2001).

The disadvantage of the known solutions is the complexity of the design associated with the need to use a large number of strips.

A flat protective screen with two degrees of freedom is known for tooling machines, which can be associated with a working element movable in at least two main directions, which includes at least a first flat covering element operatively connected to the working element; at least a second planar covering element; guides and holding elements for the sliding interconnection of the closing elements. The protective screen additionally includes an intermediate frame between the first and second flat closing elements, configured to allow mutual sliding of the flat elements along two mutually orthogonal main directions (according to patent US8640570B2, F16P 1/00, publ. 02/04/2014).

The disadvantage of this solution is that relatively large forces are required to move the flat elements together.

A protective screen is known for the area of the machine, within which the working part of the machine moves along the working path. The screen includes a fixed frame, which can be attached to the machine, and a plurality of movable elements located between the fixed frame and the movable elements. The screen elements are arranged in order of decreasing size and are located around the working part, connected to each other by a first support and a guide rod and a second support and a guide rod at a predetermined distance from each other. Between the elements and the rods there are a number of sliders designed to guide the movable elements of the cover in a direction parallel to the rods and in a direction at right angles to the rods while moving the working part, keeping the working area closed (as per patent US6481313B1, E06B 3/42, F16P 3/00, published 11/19/2002).

The disadvantage of this solution is the complexity and material consumption of the design.

The closest technical solution is a protective screen for the area of the machine in which the workpiece moves along a working path, preferably passing in one plane, in the specified area. The screen consists of a fixed element that can be attached to the machine, a movable element connected to the workpiece and a plurality of movable elements located between the fixed and movable element. The screen elements, assembled in a package and arranged in order of decreasing size, are connected to each other by first and second support rods, at a given distance from each other and with corresponding movable guides on the rods to guide the movable cover elements in a direction parallel to the rods and in direction at right angles to them, while moving the workpiece, keeping the processing area closed (according to patent US6260439B1, F16P 1/00, publ. 07/17/2001).

The disadvantage of this solution is the possibility of jamming when the rods are skewed.

The technical result to be achieved by the present invention is to create a strong, rigid and movable structure of a protective screen with two degrees of freedom, which provides security and protection from unauthorized access to the mechanisms of the lever (handle, rod), which has up to six degrees of freedom.

The specified technical result is achieved by the fact that the protective screen of the lever consists of two or more flat segments that are movable relative to each other, each segment has a hole in the center, the segments are installed overlapping each other, and each subsequent segment has a smaller size than the previous one. the holes in each segment are larger than the size of the hole in the next segment in decreasing order, but smaller than the size of the next segment, and are characterized in that the segments are connected by scissor mechanisms so that each segment is secured at the cross-connection of the scissor mechanism supports.

The preferred number of scissor mechanisms is three to four.

In addition, the scissor mechanisms can be evenly distributed around the hole.

The proposed invention is illustrated by the following drawings, which depict a particular case of the invention:

Fig. 1 – protective screen, front view, axonometry;

Fig. 2 – disassembled protective screen, axonometry;

Fig. 3 – protective screen, rear view, axonometry;

Fig. 4 – segments of the protective screen, front view;

Fig. 5 – protective screen with a lever, axonometry;

Fig. 6 – directions of movement of the lever, protective screen with round holes.

The protective screen of the lever consists of segments 1...5 (Fig. 1, 2, 3), in the center of each of them there are holes 6...10, respectively. Segments 1...5 are installed overlapping each other and connected by scissor mechanisms 11. Each segment is fixed at the cross-connection point 12 of supports 13 of scissor mechanism 11.

Each next segment (Fig. 4) has a smaller size A _n+1 and B _n+1 than the sizes A _n and B _n of the previous segment. The dimensions C _n and D _n of the hole in each segment are larger than the dimensions C _n+1 and D _n+1 of the hole in the next segment, but less than the sizes of the next segment A _n+1 and B _n+1 .

Application.

The protective screen can be installed, for example, on a sports exercise machine (not shown in the figure). Lever 14 (Fig. 5) of the sports simulator passes through the hole 10 of the smallest segment 5. When moving, lever 14 pushes segment 5, driving the scissor mechanisms and shifting all segments in the direction of movement of lever 14.

The described protective screen has structural strength, rigidity and mobility. The screen has two degrees of freedom, which ensures that the hole through which the lever passes moves in a horizontal plane. The protective screen provides security and protection from unauthorized access to the mechanisms, while the lever can perform reciprocating movements along three straight axes, as well as rotate and rotate if installed on a hinge (Fig. 6).

In the design of a protective screen, it is preferable to use from three (for example, for a round screen) to four (for example, for a rectangular screen) scissor mechanisms. This will provide the best balance of strength and mobility.

The uniform distribution of scissor mechanisms allows the load from the moving segments to be evenly distributed, which further affects strength and rigidity.

Thus, the solutions used in the invention ensure the achievement of a technical result.

Claims (2)

1. A protective screen for a sports exercise machine lever, consisting of two or more flat segments that are movable relative to each other, each segment has a hole in the center, the segments are installed overlapping each other, and each subsequent segment has a smaller size than the previous one, the hole size is each segment is larger than the size of the hole in the next segment in decreasing order, but smaller than the size of the next segment, and characterized in that the segments are connected by scissor mechanisms such that each segment is secured at each cross-connection of scissor mechanism supports and the scissor mechanisms are evenly distributed around the hole . 2. The screen according to claim 1, characterized in that the number of scissor mechanisms is from three to four.