JPS5942677Y2 - Chassis dynamometer pit cover device - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a pit cover for a chassis dynamometer used for indoor vehicle running tests, particularly a retractable pit cover.

Prior Art This type of pit cover must be mechanically strong enough to withstand the weight of the test vehicle on which it rests, and if the test vehicle is changed, the distance between the paired drums must be adjusted to match its wheel base. It is necessary to match.

Therefore, it is necessary to be able to change the pit cover in accordance with the adjustment of the drum interval.

To explain the conventional chassis dynamometer related to the above (documents unknown) with reference to FIGS. A drum 4 is supported, and above the fixed drum 4 a fixed frame 5 having a front wheel setting hole 5a is arranged and fixed at both ends to the side wall of the pit 1 in a manner similar to that shown in FIG. 1B.

A movable bed 6 that moves left and right on the fixed bed 2 is arranged to the left of the fixed bed 2 in the pit 1, and the rear wheels of the test vehicle are placed on this movable bed 6 via a bearing stand T. A moving drum 8 is rotatably supported.

A pair of feed screws 9 extending parallel to the left-right direction of the movable bed 6 are rotatably supported by a pair of screw receivers 10, for example, on the side surface of the movable bed 6, and the right end of the feed screw 9 is fixed. It is supported on the bed 2 by a bearing 11, and the left end of the feed screw 9 is connected to an electric motor 12 either directly or via a sprocket or chain (not shown).

A portion of the pit cover in the moving section of the movable drum 8 has a T-shaped subdivided fixing plate 13 and a rear wheel setting hole 14.
The movable frame 14 has an end portion fixed to the wall of the pit 1 and is supported as shown in FIG. 1B.

Problems to be Solved by the Invention According to the above-mentioned conventional technology, when moving the movable drum 8 to match the wheel base of the test vehicle, the fixed plate 13 is moved to a predetermined position instead of being moved according to the distance of movement. The moving frame 14 having the rear wheel setting hole 14a on the moving drum 2 was also replaced by hand.

In addition, since the fixed plates 13 and the movable frame 14 were configured to be placed and fixed on the side walls of the pit 1 without overlapping each other, the load of the test vehicle was applied solely to the fixed plates 13 or the movable frame 14. Therefore, it was necessary to increase the plate strength and frame strength to withstand large loads.

As a result, the fixed plate 13 and the movable frame 14 are very heavy, and it is difficult to replace them by hand, which poses problems in terms of replacement efficiency and safety.

In view of the problems of the prior art described above, the object of this invention is to provide a telescoping pit cover device for a chassis dynamometer that is relatively lightweight, has high strength against loads, and can be easily adapted to various wheel bases. be.

Means and Function for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a system in which one of the drums supported on a movable platform in the pit is movable according to the wheel base length of various vehicles, and A chassis dynamometer having a plurality of support plates suspended in the width direction of the pit at the front and rear of the drum, wherein the plurality of support plates are stacked and connected so as to be movable in the horizontal direction between adjacent ones. A pit cover device for a chassis dynamometer is constructed, in which the support plate of the cover located near the drum is connected to the movable table, while the support plate farthest from the drum is fixed to the pit.

By adopting such a means, the pit cover can be set in conjunction with the movement of the drum to match the length of the wheel base of various vehicles, since each support plate can be moved to expand and contract as the movable table moves.

EXAMPLE An example of this invention will be described below with reference to FIGS. 2 to 5.

Note that the same reference numerals are used for the same functional members as in FIGS. 1A and 1B, and the explanation thereof will be omitted.

2 and 3, pit covers 20 and 30 are shown on the left and right sides of the moving drum 8, respectively.

As shown in FIG. 3, the pit cover 20 includes a T-shaped support plate 21 having a T-shaped cross section, and reverse-shaped support plates 22 and 23 with reverse cross-sections and reverse-shaped support plates 23 arranged oppositely on both sides. On the left side of the fixed support frame 24 whose end is fixed to a step carved into the wall of the pit 1, and on the right side of the inverted support plate 22,
It consists of a moving frame 25 having a rear wheel setting hole 25a, and each support plate is connected by a stopper bolt 26 loosely inserted into the respective hanging portions 21a, 22a, 23a.

Boss portions 26a at both ends of the stopper bolt 26 function as stoppers.

Reverse support plate 23 and hanging parts 23a, 24a of fixed support frame
are connected by a stopper pole (27) fixed to the inverted support plate (23).

In this case, it is assumed that the hanging portion 24a of the fixed support frame 24 is loosely inserted into the stopper pole 27.

Further, 27a is a boss portion that acts as a stopper for the stopper bolt 2γ.

Furthermore, the inverted support plate 22 and the hanging portion 22at of the moving frame 25
25b is also a stopper bolt 28 fixed to the hanging portion 22a.
The hanging portion 25b is connected so as to be loosely inserted thereinto.

The stopper bolt 2'8 also has a stopper 28a.

The pit cover 30 also has substantially the same configuration as the pit cover 20.

That is, a T-shaped support plate 31°, inverted support plates 32 and 33 arranged symmetrically on both sides, an inverted hanging part 25c integrated with the movable frame 25, and a fixed frame 40 having a front wheel setting hole 40a on the right side. It consists of a hanging part 40b and a T-shaped support plate 31. The hanging parts 31a, 32a, 33a of the inverted support plates 32, 33 are connected by a stopper bolt 34.

In this case, the hanging parts 32a, 33a are loosely inserted into the stopper bolt 34, and the boss parts 34a at both ends of the stopper bolt 340 act as stoppers.

The hanging portion 32a of the inverted support plate 32 and the hanging portion 40b of the fixed frame 40 are also connected by a stopper bolt 35 that loosely fits into at least one of these, while the inverted support plate 33 and the hanging portion 33a of the movable frame 25 , 25c are also interconnected by a stopper bolt 36 that loosely fits into at least one of them.

Each of the stopper bolts 35 and 36 also has a stopper as a boss at its end.

As is particularly clear in FIG. 5, the pit covers 20, 30 slide with their ends placed on rails 51 provided at the upper ends of columns 50 fixed near the side walls of the pit 1.

A sliding material such as Teflon is provided on the lower surface of each member 2L 23, 24 and the upper surface of the rail 51 to ensure smooth sliding.

The side plate 29 of the movable frame 25 of the pit cover 20 is provided with opposing L-shaped engagement fittings 52.
The upper end of the moving rod 53 is loosely fitted between the two, and the lower end thereof is fixed to the moving bed 6.

Now, when the movable bed 6 is moved to a desired position by driving the electric motor 12 to match the wheel base of the test vehicle, the movable rod 53 fixed to the movable bed 6 also moves.

As a result, the hanging portion 25b of the moving frame 25 fixed to the moving rod 53 via the side plate 29 is connected to the hanging portion 25b of the inverted support plate 22.
2a and move it to the left.

When the movable bed 6 moves further to the left, the hanging portion 21a of the central T-shaped support plate 21 is replaced by the hanging portion 22 of the inverted support plate 22.
a hits and moves this T-shaped support plate 21 to the left.

Thus, the pit cover 20 on the left side of this moving drum 8
is reduced in length, while the pit cover 30 on the right side of the moving drum 8 is conversely increased in length, resulting in the state shown in FIG.

When the pit cover 20 is extended from the contracted state, for example, as shown in FIGS. 2 and 3, when the hanging part 25b of the movable frame 25 fixed to the side plate 29 moves to the right within the length range of the stopper bolt 28. This corresponds to the boss portion 28a of the stopper bolt.

When the moving frame 25 moves further to the right, the stopper bolt 28
This causes the inverted support plate 22 to be pulled to the right.
moves to the right.

In this way, the lower left T-shaped support plate 21. Inverted support plate 2
3 will also be pulled to the right.

FIGS. 6 and 7 show a modification of the pit cover 60 of this invention, which is similar to the pillar 50 of FIG.
Like the rail 51 above, cross-sectional shaped support plates 61a, 6 are arranged on a rail 66 fixed on a support (not shown).
1b, 61c upper horizontal plate 62a, 62bt 62e
L-shaped arm fittings 63 a, 63 b t 63 on the right end of
c is set in one piece, this arm fitting 63 a, 63
On the right side of b t 63 c, integral stopper pins 65 a, 65 b, 65 c are engaged with the left ends of cross-sectionally shaped support plates 64 a t 64 b, 64 c, and the shaped support plates 61 a, 61b.

The left ends of the upper horizontal plates 62a, 62b, and 62c of 61C are adjacent one-form support plates 64 a t 64 b t 64 c
are fixed to the right ends 64'a and 64'b by welding or the like.

And the pit cover is 20 or 30 of the above-mentioned embodiment.
As shown in the figure, the left and right ends are connected to a fixed frame or a movable frame.

The states shown in FIGS. 6 and 7 show the state in which the pit cover 60 is fully extended, but now the left end of the pit cover 60 in FIG. 1 is connected to the fixed side of the pit as shown in FIG. Consider the case where the right end is connected to the measuring plate 29 and moved by the moving rod 53.

In this figure, when moving the moving bed 6 to the left, the moving rod 5
3, the one-form support plate 64c moves to the left.

As a result, the lower surface of the one-shaped support plate 64c and the shaped support plate 61c
The upper surface of the upper horizontal plate 62c slides between the end 64'c of the one-form support plate 64c and the end 64'b of the front one-form support plate 64b.
is hit, and thus the machining support plate 61c also moves to the left.

Sequentially, the shaped support plate 61c and the shaped support plate 64b integrated therewith move to the left, and the pit cover 60 is reduced in size as a whole.

When the movable bed 6 moves to the right on the contrary, when the one-shaped support plate 64c moves in the direction of arrow P in FIG.
The stopper pin 65c of 4c hits the arm fitting 63c of the workpiece support plate 61e and moves the workpiece support plate 61c to the right.

Similarly, the one-form support plate 64 integrated with the work-form support plate 61c
The stopper pin 65b of b is further adjacent to the working support plate 61b.
It catches on the arm fitting 63b and pulls this work support plate 61b to the right, resulting in the state shown in FIG.

In this case, as in the previous embodiment, FFI dynamic materials 67 and 68 such as Teflon are adhered to the lower surface of each of the shape support plates 61a>61bt61c and the upper surface of the rail 66 to form the shape support plates 61at61b.

61c can be easily slid.

When the pit cover 60 is properly extended and positioned,
It is fixed to the pit inner wall or fixed frame by appropriate means.

Effects of the Invention According to the invention described above, the pit cover consisting of a plurality of support plates can move in a manner that expands and contracts in conjunction with the movement of the movable platform. When moving the drum, there is no need to manually move the pit cover, and preparations for running tests can be performed simply, quickly, easily, and efficiently.

Furthermore, since each support plate is overlapped at least partially between adjacent support plates, the partial load of the vehicle is shared among multiple support plates, so the strength of each support plate alone is greater than before. The structure is simple and lightweight.

[Brief explanation of the drawing]

Figures 1A and 1B are cross-sectional views of a conventional test device and its A
-A cross-sectional view, Figure 2 is a cross-sectional view of the test equipment incorporating the pit cover of this invention, Figure 3 is an enlarged view of the pit cover of this invention, and Figure 4 is the test equipment incorporating the pit cover of this invention. 5 is a partial sectional view taken along line B-B in FIG. . 4... Fixed drum, 8... Moving drum, 12... Electric motor, 13... Fixed plate,
20, 30, 60... Pit cover 21,
31...T-shaped support plate, 21a, 22a, 23a
, 31a, 32a, 33a... hanging portion, 22,
23, 32, 33... Inverted support plate, 26, 2
7, 28, 34, 35, 36... stopper bolt, 61a, 61b, 61c... shaped support plate,
63a, 63b, 63e...-shaped support plate,
65a, 65bt65c...stopper pin.

Claims (3)

[Scope of utility model registration request] (1) One of the drums supported on a movable platform in the pit is movable to match the length of the wheelbase of various vehicles, and a plurality of support plates are each suspended in the width direction of the pit at the front and rear of the drum. In the chassis dynamometer having the pit cover, the support plate located near the drum of the pit cover is formed by sequentially overlapping the plurality of support plates so as to be movable in the horizontal direction between adjacent support plates, and the support plate is connected to the movable base. On the other hand, a pit cover device for a chassis dynamometer is characterized in that the support plate furthest from the drum is fixed to the pit. (2) The support plate consists of one with a T-shaped cross section and one with an inverted cross-section, with the support plate with an inverted cross-section in the center, and a plurality of support plates with an inverted cross-section on both left and right sides of the support plate, each with a hanging portion. are sequentially overlapped in the width direction in the pit, and a stopper bolt is connected between the adjacent hanging parts of each support plate, and one end of the stopper bolt is fixed to one of the hanging parts. , the other end of the pit cover device for a chassis dynamometer according to claim Ml, wherein the other end is loosely fitted into the other hanging portion. (3) The support plate consists of one with a cross-section shape and one with a cross-section shape, and arm fittings are attached at both ends of the cross-section shape support plate in the longitudinal direction, and arm fittings are attached at both longitudinal ends of the cross-section shape support plate. A stopper pin facing the arm fitting is provided in each section, and a support plate for the cross-section shape and a support plate for the cross-section shape are alternately provided, and one end of the support plate for the cross-section shape is used to support the cross-section shape. At the same time, the other end of the cross-sectional support plate is overlapped with the other end of the cross-sectional support plate, and the stopper pin and the arm fitting are engaged. A pit cover device for a chassis dynamometer according to claim 1, characterized in that the pit cover device is arranged so as to be able to fit together.