SU1339039A1 - Vehicle cab door - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to transport engineering, in particular to the doors of vehicle cabs. The aim of the invention is to reduce the mathematics capacity. The vehicle cabin door contains a power panel 1. The power panel 1 is made of a central plate 2 and housings 3 and 4. The central plate 2 is made with horizontal recesses. J a (L 00 so with about 00; o

Description

The housings 3 and 4 have a P-O5razii cross-section and are connected to the central plate 2 by rods 13. To the central plate 2, the rods 13 are connected at the center S of the impact door. AT

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The invention relates to transport engineering and can be used in the design of doors for vehicles, in particular tractors.

The aim of the invention is to reduce metal consumption.

Figure 1 shows the door of the cab of the vehicle, the view from the outside; in fig. 2 is a section A-A in FIG. 1; in fig. 3 is a section BB in FIG. one.

The vehicle cabin door contains a power panel 1, which is made in the form of a central plate 2 and two covers 3 and 4. Plate 2 consists of two forgings 5 rigidly interconnected and having flanges 6 on both horizontal sides 7. When connecting forgings The 5 flanges 6 form horizontal recesses 8 of the central plate 2. The housings 3 and 4 have a U-shaped cross-section and are placed on both sides of the plate 2, forming window openings 9. In window openings 9 glass 10 is installed with the possibility of limited lateral space. displacement relative to the central plate 2. This possibility is provided by the gaps 11 between the glasses 10 and the sides 12 of the recesses 8. The housings 3 and 4 are connected to each other and to the central plate 2 by means of two rods 13. The ends 14 of the rods 13 are connected elastically to the central parts 15 cases 3 and 4. In the central part 15 of each case there is a clamp 16, into which a bolt 17 is inserted, screwed into a threaded sleeve 18. Threaded sleeves 18 are welded to the ends 14 of the rods 13. There are rubber sleeves 19 placed between the clamps 16 and the heads of the bolts 17. Other ends 20 the rods 13 are rigidly fixed to the plate 2 in the center S of the door strike (the door shock detection center S is attached to the shock absorber 21, the other end of which is attached at the level of the hinge 23 for hanging the panel on the cab. 2 hp f-ly, 3 ill.

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the position of the center of the door strike is given below).

The door is provided with a shock absorber 21 and is suspended to the frame of the cab 22 by means of a hinge 23. The hinges 23 and the shock absorber 21 are installed at the same level a-a, passing through the center S of the door strike. The fastening of the shock absorber 21 on the door is made at a point coinciding with the center S of the impact of the door.

The door joint with the frame 22 is sealed with a rubber seal 24 located on the frame around the entire perimeter of contact with the door. The force of pressing the door to the frame 22 is adjusted by bolts 17. The door is pressed against the frame of the cab 22 by a lock (not shown). The lock has a conventional construction and is mounted on the plate 2 on the left side 25 of the plate 2.

The door of the cab of the vehicle operates as follows.

In the case of normal operation of the door, i.e. when it is opened and closed smoothly, the door is loaded with comparatively small forces, mainly by the force of the body of the door elements (glass 10, panel 1, rods 13, etc.). These forces are small and load the power panel 1 to bend in the XO plane (figure 5), in which the resistance to bending of the panel is maximum. The power panel 1 resists these forces well and transmits them to the frame of the cab 22 through a loop 23, which also operates normally under these loads,

In case of a shock loading of the door in case of its sudden closing and opening, as well as in the case of sudden loading by a gust of wind, the door is loaded not only by force of gravity, but also by significant inertial forces. In this case, the inertial forces act in a direction perpendicular to the plane of the door (parallel to the Y axis), loading the door into a bend in a plane with low bending resistance. However, in this case, it will work reliably due to the damping of shock loads by panel 1 and the shock absorber 21 doors.

The panel 1 is made in the form of a central plate 2 with horizontal depressions 8 on both sides 7 and two covers 3 and 4 of U-shaped cross section, located on both sides of the central plate 2 and forming (with their last window openings, and connecting the covers to each other and with a central plate in the form of two rods 13, simplified the design of the door, namely the structure of the power panel and the fastening of the glasses 10, to reduce the laboriousness of manufacturing the door and the waste of material in its manufacture, since the central plate 2 and the covers 3 and 4 They are made from simple forgings that can be made on conventional bending machines with little effort. Strip steel can be used as blanks, for example, by cutting sheets. Waste is small when cutting sheets, and completely absent during bending. That, at the famous door, the panel, made together with window openings, consists of complex stampings, which can only be made on stamping machines with large forces and complex stamps. In this case, sheet material is used for blanks, and the manufacturing process is accompanied by large metal losses, as it is required to cut the metal for window openings.

The invention makes it possible to refuse to drill holes in panel 1 (in the known device they were necessary for fastening glasses with screws), to simplify mounting of glasses 10 and to reduce the laboriousness of their installation in panel 1, since glasses are fastened by squeezing without using seals, strips and fasteners screws.

The connection of the end 14 of the rod 13 with the casing 3 (4) in its central part 15 made it possible to ensure a uniform and gentle pressing of the casing 3 (4) along its length to the edge of the glass 10 and, therefore

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provide uniform compression of the glass 10,

Installing the glasses 10 in naHCjni 1 with the possibility of limited lateral movement relative to the central plate 2 and connecting the ends 14 of the rods 13 to the covers 3 and 4 in the form of a screw joint with a rubber sleeve 19 allows the glasses 10 in the panel 1 to be held elastically by forces created when screwed bolts 17, as well as to ensure the safety of the glasses 10 and reduce the load on the door when it hits the frame of the cab 22 by damping the opening of the angle of the windows 10. When the door is closed, it first comes in contact with the frame of the cab 22 the upper and lower edges of the door, i.e. covers 3 and 4. Between the door and the frame of the cab 22, a pressing force arises, which gradually increases as the angle of inclination of the glasses 10 relative to the central plate 2 increases. The amount of pressing force depends on the initial angle of inclination of the glasses 10, which is established by screwing the bolts 17. This increases operational reliability of the door, since it became possible during its operation to adjust the pressure of the door to the frame of the cab 22 and compensate for possible deformations of the door.

Making the door hanging elements in the form of a single hinge 23 installed with a shock absorber 21 on the same level aa passing through the center S of a door strike, and fixing the end of the shock absorber 21 on panel 1 in the center S of a door strike reduced the metal consumption of the door and simplified its installation on the frame of the cabin 22, since it is not necessary to adjust the door when hanging.

This reduces the loading of the panel 1 and the hinges 23 when the door is hit, as the shock absorber 21 dampens the impact forces. Here, the force of the shock absorber 21 is applied at the center S of the impact of the door, to which inertial forces are brought in the form of a force vector without a moment. The force of the shock absorber 21 acts along its axis and at the point of attachment to the panel can be decomposed into two components: perpendicular to the door plane (parallel to the OY axis) and horizontally directed (pa30

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parallel to the axis OX). The perpendicularly directed component acts against the inertia forces of the door and reduces their effect on panel 1 and loop 23. A horizontally directed component acts along the line aa, which coincides with the line of installation of the loop 23, and does not load the panel and the loop.

Claims (3)

1. A vehicle cabin door containing a power panel with window openings, elements for visiting the panel on the cabin and a shock absorber mounted on the panel, characterized in that, in order to reduce metal consumption, the panel includes a central plate with horizontal recesses39039 housings located above and below the plate and having a U-shaped cross section and connected to the plate by means of rods attached to the plate in the center of impact of the doorway, while the element for visiting the panel in the cabin is located at the level of the shock absorber attached to the plate in the center of the door strike. 2, Door 1, characterized in that the glasses are installed with the possibility of limited lateral movement relative to 15 plates. 3. Door POP.1, characterized in that the connection of the rod with the case is a screw connection placed in the sleeve 20 the A2J Pui city b 10 S 9.3 Editor V.Danko Compiled by N.Kulikova Tehred L.Oliynyk Order 4176/13 Circulation 598 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 Proofreader I. Muska