SU1229096A1 - Parking braking device - Google Patents

Description

The invention relates to devices of the portable type, which exclude undesirable movement of vehicles, in particular, by fixing the front wheels of automobiles on the weighing platform of the test bench.

The purpose of the invention is to increase the reliability of fastening, in particular, the front wheels of the vehicle on the bearing surface of the weighing platform of the test stand.

FIG. 1 shows the device in the working position (at the moment of fixing the front wheels of the car on the weighing platform of the test stand), general view; in fig. 2 is a view A of FIG. one; in fig. 3 is a view B in FIG. 2; But FIG. 4 shows a section B-B in FIG. 2; in fig. 5 is a view of FIG. 2; in fig. 6 is a section DD-D in FIG. 3; in fig. 7 — node I in FIG. 6; in fig. 8 is a section of the EE of FIG. 3

One hundred night braking device contains two wedges interlocked as one piece in the form of an all-welded block 1, freely mounted on a smooth bearing surface 2 of the weighing platform 3 of the test bench 4 of vehicles 5 (Figures 1 - 3).

The wedge in block 1 is provided with entrance 6 and exit 7 apexes and in combination with side walls 8 ,. based on the supporting surface 2, they form a closed finned cavity 9 (Fig. 6), sealed in the perimetric part of the base 10 by a seal 11, leached, for example, from sponge rubber and located in the groove 12 of the base so that in non-working patozhenie 5) the seal 11 protrudes by the amount C (Fig. 7a) relative to the plane of the base 10 of the wedges in block 1. The closed cavities 9 of both interlocked wedges in block 1 included in the device kit are interconnected by flexible hose 13 (Fig. 2) and through a control valve 14 with a vacuum line 15.

Working in contact with the wheel 16 of the vehicle 5, the driving surface 17 (FIG. 6) of the wedges in block 1 and the ramps 6 and 7 is made in the cross-section of the grooved. On the outer lateral surface of the wall 8 wedges in block 1, there are reinforcements 18 (Fig. 2), in which pins 19 of the fixing element, made in the form of a telescopic folding (at 90 °) bracket 20, fitted with an adjustable tension lock containing a pivot arm 21, interacting through the glands 22 from the terminals m with a connection 23, covering the retractable grip 24 of the armored bracket 20 (Fig. 4). The device operates as follows. The wedge in block 1 is mounted on the support surface 2 of the weighing platform 3 of the test bench 4 at the location corresponding to the location of the front wheels 15 of the test vehicle mode 5 (Fig. 1 and 2). The Kronschteins 20 fixing elements are folded back so that they are located on the supporting surface 2

Platforms 3. When a vehicle 5 is being fed to the test stand 4, its front drops 15, rolling over the entrance ramps of the device 6, are installed in the wedge middle part of the interlocking wedges in block I, and the seals 11 under the influence of part of the weight P (Fig. 76) of the vehicle 5, deformed by the value of C, provide reliable tightness of the closed cavities 9. Then install the locking elements, turning the folding telescopic brackets 20 from horizontal to vertical position when open x tensioning locks (fig. 2) until the upper parts of the front wheels are covered by 16 retractable hooks 24.

Turning each locking lever 21 of the tension lock produces a telescopic shift down of the slide grip 24, the terminal connection 23 of which is inadequate, is not adjusted so that when the lever 21 of the lock 21 is tangented, the lock is partially elastically deformed 24 tire wheels 16, while it turns out to be reliably fixed from the vertical, longitudinal and transverse movements relative to the cylinder in block 1.

The crane 14 is directly connected to the closed cavities 9 of the indicated wedges in block I with the vacuum main 15 (the vacuum pump is not shown). In this case, in the cavity 9, a discharge is created, which ensures reliable fixation of the interlocked wedges in block 1 on the surface 2 of the weight platform 3 and precludes their movement in any direction.

Upon reaching vacuum in closed

The cavity 9 of the interlocking wedges 1 is blocked by a three-way valve 14 over the vacuum line 15 and at the same time the vacuum pump is turned off. At the end of the test of the vehicle 5, the front wheels 16 are unlocked in the reverse order described by a three-way crane 14 connecting the floor of the 9 wedges 1 to the atmosphere and placing them on the required bases of the wheels of the next vehicle model.

The process of aerodynamic testing of a vehicle (automobile) 5 and its braking qualities on stand 4 under conditions of galloping, variable speed, roll, and vibration of a grooved form of interlock wedges in longitudinal and transverse sections under the joint action of the clamping fixation device excludes what - or the movement of the front wheels;

It ensures their reliable centering in these directions relative to wedges. Vacuum suction wedges and weighing platform

excludes both vertical movement and any movement in the plane of the platform. .

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Claims (3)

1. PARKING BRAKE DEVICE, comprising mirrored wedges for wheels and an upper fixing element connected to the wedges by a telescopic bracket with a tie lock, characterized in that, in order to increase the reliability of fastening, in particular, the front wheels of the vehicle on the supporting surface of the weighing platform the test bench, the wedges are combined into a single housing, the base of which along the perimeter is equipped with a seal, forming a closed cavity with a supporting surface connected to a vacuum source ma. 2. The device according to π. 1, characterized in that the bracket is pivotally mounted on the side surface of the housing. 3. The device according to paragraphs. 1 and 2, characterized in that the working surface of the wedge body in cross section is made in the form of a grooved shape. § 1