JPS6318129B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for fixing an idler wheel of a vehicle on a stand in a chassis dynamometer for a four-wheeled vehicle.

An example of a fixing device for the front and rear wheels of a vehicle is JP-A-49-70391 (Fixing device for automobiles).
This system uses a number of levers to connect an actuating member that also serves as a stop placed in front of the front wheel and a movable fixture placed behind the rear wheel, so that when the front part of the front wheel pushes the actuating member, The interlocking movable member springs up and pushes the rear part of the rear wheel, fixing the front and rear wheels together. However, this method requires space for arranging a large number of intermediate levers, and is difficult to be applied as a means for fixing either the front or rear wheels, such as a chassis dynamometer. In addition, since large accelerations and decelerations are applied to vehicles tested on a chassis dynamometer, fixing means with play such as many levers and flip-up parts of this type of device may not be able to fix the vehicle. Perfection is inevitable.

A chassis dynamometer places the drive wheels of the vehicle under test on rollers connected to a load device, applies a predetermined load to the vehicle via the rollers while the vehicle is being driven, and then measures the vehicle's exhaust gas, for example. gas etc.
The required amount of measurement is carried out, and since inertia force acts on the vehicle during operation, it is necessary to firmly fix the idle wheels of the vehicle on the platform. To do this, for one of the idlers, two stop bodies with a triangular cross section are placed before and behind the idler wheel, so that the slope of the stop body and the idle wheel are in contact, and the stop body is fixed. I will do it. In order to do this, the stop bodies are moved from the outside of the idler wheel toward the idler wheel so as to be located at the front and rear of the idler wheel, and each stop body is further moved so as to come into contact with the idler wheel. As described above, the stop body is moved twice: in the direction toward the idler wheel and once in contact with the idler wheel.

Therefore, a known fixing device will be briefly explained. This eliminates the large number of levers in the front and rear wheel fixing devices mentioned above, eliminates the flip-up mechanism for the rear wheel fixing device, makes the fixing device movable in the lateral and longitudinal directions of the vehicle, and allows the fixing device to move freely in the moving position. This allows it to be fixed in place.

FIG. 1 is a diagram showing the top of the chassis dynamometer. A part of the stand is cut out, and the surfaces of the rollers 11 and 12 are exposed therefrom. The drive wheels 1 and 2 of the vehicle under test are placed on these rollers 11 and 12, respectively, and the idler wheels 3 and 4 are positioned to the right of the rollers 11 and 12, respectively. The fixing device for the idler wheels 3 and 4 consists of first and second rail members 21 and 22 fixed on a stand along the longitudinal direction of the vehicle on both outer sides of the idler wheels 3 and 4, and the rail members 21 and 22. , 22, respectively, and movable pieces 23, 24 on the respective rail members 21, 22, which can be freely fastened to and released from the rail members, and 25, 2.
6, and beam members 27 and 28 arranged in a direction orthogonal to the rail members 21 and 22 and having both ends fixed to the movable pieces 23 and 25 and 24 and 26, respectively.
, two movable bodies 31 and 3 are provided on the beam members 27 and 28, which are movably supported on the beam members 27 and 28 and can also be attached to and detached from the beam members.
2, 33, and 34, and the moving body 31
~34 On top is a wedge-shaped protrusion (stopping body) 35,3
6, 37, and 38 are each provided integrally.

The fixing operation using the above fixing device is as follows.

First, between the beam members 27 and 28, the idler wheels 3 and 4 are placed between the beam members 27 and 28.
Both beam members 27,
28 to the moving pieces 23 to 2 on the rail members 21 and 22
6, and at the same time, the beam member 2
The movable bodies 31 to 34 on the wheels 7 and 28 are also moved to the outside of the idler wheels 3 and 4, respectively.

Next, the vehicle to be tested is transferred onto a stand, its driving wheels 1 and 2 are placed on predetermined positions on rollers 11 and 12, and idler wheels 3 and 4 are positioned between beam members 27 and 28.

In this state, move the movable bodies 31 to 34 to the idler wheels 3 and 4.
each wedge-shaped portion 35~
38 is positioned on the front and rear lines of the idler wheels 3 and 4, and each moving body 31 to 34 is fixed to the beam members 27 and 28, respectively. Next, first, the movable pieces 23 and 25 to which both ends of one beam member 27 are fixed are moved along the rail members 21 and 22, and the wedge-shaped protrusions 35 and 36 on the beam member 27 are moved to the idle wheels, respectively. 3,4
In this state, move the moving piece 23,
25 are each fixed on the rail members 21 and 25. Next, move the other beam member 28 in the same manner,
The wedge-shaped portions 37 and 38 fixed thereon are pressed against the other circumferential surfaces of the idler wheels 3 and 4, respectively, and in this state the movable pieces 24 and 26 are fixed on the rail members 21 and 22, respectively.

As a result of the above, the idler wheels 3 and 4 are made immobile on the table.

However, in the above device, two stop bodies are provided on each of the two beam members, and each idler wheel is fixed between each of the opposing stop bodies.
In order to fix it, it is necessary to press the beam member in the front and back direction of the idler wheel on the outside of each idler wheel, and in the end, one operator is required on the outside of each idler wheel to perform this operation. It becomes necessary. In addition, this beam member is arranged in a direction perpendicular to the mounting direction of the vehicle under test, and therefore, when entering a predetermined position on the vehicle platform, the wheels will ride over the beam member. Because of the impact, extra care must be taken when entering the vehicle, and at the same time, there is a risk that the on-vehicle instruments may be damaged, so there is a problem that such instruments cannot be mounted on the vehicle in advance.

To improve this, cut the beam member in the middle,
It is conceivable to move the separated beam member for each idler wheel so that each idler wheel can be fixed using a stopper on it, leaving only one operator. It is extremely difficult for one person to press the beam member onto the idler wheel by one person, as it requires a large amount of force and the beam member must be fixed to the rail member while being pressed. Moreover, even if the beam member is separated, the tip of the beam member must reach the position of the idler wheel, so the problem of riding over still remains.

In order to eliminate these problems, the present invention provides a simple fixing device for each idler wheel, and the present invention provides a simple fixing device for each idler wheel. an arm fixing member which is movably coupled to the rail member in the front-rear direction and can be attached to and detached from the rail member; and an arm fixing member supported by the arm fixing member so as to be movable in a direction perpendicular to the rail member In addition, a T-shaped arm is made detachable by an arm fixing member, and a pair of T-shaped arms are movably engaged with the horizontally elongated portion of the T-shaped arm and are respectively engaged with feed screws provided at both ends of the T-shaped arm. It consists of an idler wheel fixing member having a fixing piece.

Next, to explain the fixing operation of the idler wheels using the above method, first, the horizontally elongated tip of each T-shaped arm is positioned on the outside (laterally with respect to the vehicle placed on the stand), and the Transfer it to the table.
In this state, one arm fixing member for the idler wheel is moved along the rail member so that the center of the T-shaped arm supported by the arm fixing member is approximately aligned with the center line of the wheel, and then, The T-shaped arm is moved inward (in the direction in which the wheel is located) until the wheel is located between the pair of fixing pieces on the horizontally elongated portion of the distal end, and the T-shaped arm is then fixed on the rail member. Next, the fixing piece is moved by the feed screw to sandwich the circumferential surface of the wheel from both sides. This completes the fixation of one idler wheel. continue,
The other idler wheel is also fixed by performing the series of operations described above. Therefore, each of the above operations can be performed by one person and does not require special skill.

Examples will be described in detail below.

In FIG. 2, rollers 11 and 12, which are numbered the same as in FIG. 1, drive wheels 1 and 2, and idler wheels 3 and 4 of the vehicle under test are arranged in the same manner as in FIG. Numbers 40 and 50 in the figure are fixing devices independently provided for each of the idler wheels 3 and 4. both 4
0 and 50 have exactly the same configuration, and are arranged on the outer sides of the idler wheels 3 and 4, respectively, and are symmetrical with the vehicle in between. Therefore, one of the fixing devices 50 will be explained below first.

In FIG. 2 and FIG. 3 showing details thereof,
A rail member 51 is fixed on a stand outside the position of the idler wheel 4 along the longitudinal direction of the vehicle (the direction connecting the drive wheel 2 and the idler wheel 4). Rail member 51
is a top plate 511 of a member 510 with a thick wall and an opening in cross section.
A groove opening 512 is bored along the longitudinal direction of the rail member 51 (FIG. 3), and arm fixing members 52, 52', 52'' are arranged on the rail member 51. Arm fixing member 52 In this case, thick members 521 and 522 each having a square cross section are disposed on the top plate 511 of the rail member 510, facing each other on the inside (FIG. 4), and a rod-shaped member of the T-shaped arm 53 is disposed between them. 531 is inserted. Then, the inner surface of the upper horizontal portion of the 〓-shaped members 521, 522 and the upper surface of the rod-shaped portion 531 of the T-shaped arm 53 come into contact, and the flesh of the 〓-shaped members 521, 522 A minute gap is created between the lower side of the thick side and the top plate 511 of the rail member 51.Below the cross-shaped members 521, 522, the inside of the rail member 51 has a gap that is almost the same as the internal cross section. Sliding bodies 523, 524 with cross sections
are loosely connected, and the square-shaped member 521 and the sliding body 523 and the square-shaped member 522 and the sliding body 524
are integrated by bolts 525 and 526 that pass through holes on the sides of the square-shaped members 521 and 522 and are screwed into screw holes in the sliders 523 and 524, respectively.

Therefore, the pair of 〓-shaped member and sliding body, 52
1 and 523 and 522 and 524 are respectively movable in the left and right direction on the rail member 51.
However, in this state, the bolts 525, 5
26, the pairs of square-shaped members and sliding bodies, 521 and 523 and 522 and 524, sandwich the top plate 511 of the rail member 51, and these are integrated with the rail member 51. It will be fixed.

Hereinafter, 521, 523, 5 consisting of the square-shaped member, sliding body, and bolt that can be moved and removed freely.
25, 522, 524, and 526 will be referred to as first and second fixing pieces 52' and 52'', respectively.

The upper surface and both side surfaces of the rod-shaped part 531 having a rectangular cross section of the T-shaped arm 53 are in contact with the inner sides of the square-shaped members 521 and 522 of the first and second fixing pieces 52' and 52'', which are opposed to each other. 4), T-shaped arm 53
are movable in the direction perpendicular to the rail member 51, and when the bolts 525, 526 of the fixing pieces 52', 52'' are tightened as described above, the arm 5
The rod-shaped portion 531 of No. 3 is the top plate 51 of the rail member 51.
It will be clamped and fixed between 1 and 1.

The oblong portion 532 at the tip of the T-shaped arm 53 has a
An idler wheel fixing member 54 is arranged. this is,
The third and fourth fixing pieces 54' and 54'' are arranged at both ends of the horizontally long part 532 of the T-shaped arm 53. To explain about ′,
On the right side of the horizontally long part 532 of the T-shaped arm 53, the dovetail groove of the base 541 is loosely engaged with the horizontally long part 532 (FIG. 6), and the feeder is screwed into the protrusion 533 provided at the right end of the horizontally long part 532. The tip of the screw 542 and the base 541 are engaged, and the rotation of the feed screw 542 moves the base 541 onto the horizontally long portion 532. A wedge-shaped portion 543 having an upward wedge is integrally fixed thereto (FIGS. 3 and 5). The other fixing piece 54'' is also made of similar components, namely a base 544, a wedge-shaped portion 546 integral therewith, and a feed screw 545 that is screwed into the left end protrusion 534 of the oblong portion and engaged with the base 544. Thus, the base portion 544 can be moved on the horizontal portion 532 by rotation of the feed screw 545.

The above is the fixing device 50 for the idler wheel 4.

Next, the fixing device 40 for the idler wheel 3 is placed outside the idler wheel 3, and is arranged symmetrically with the fixing device for the idler wheel 4 (FIG. 2); its configuration is fixed. It is exactly the same as the device 50, and includes a rail member 41, an arm fixing member 42 consisting of first and second fixing pieces 42' and 42'', a T-shaped arm 43, and third and fourth members loosely engaged with the horizontally elongated part of the arm fixing member 42. fixed piece 44',
It is composed of an idler wheel fixing member 44 having a length of 44''.

Idle wheels 3, 4 with the above fixing devices 40, 50
The fixing operation is as follows.

First, the T-shaped arms 43, 53 of each fixing device 40, 50 are moved outward (the state shown in FIG. 2), the vehicle is transferred to a platform, and the drive wheels 1, 2,
Position the idler wheels 3 and 4 at predetermined positions. next,
In one of the fixing devices, for example, the fixing device 50 for the idler wheel 4, the first and second fixing pieces 52', 52'' of the arm fixing member 52 and the T-shaped arm 5
3 along the rail member 51 to align the rod-shaped portion 531 of the T-shaped arm 53 with the center of the idler wheel 4. In this state, move the T-shaped arm 53 along the idler wheel 4.
the third and fourth fixing pieces 54',
54'' sandwich the idler wheel 4 and position it in an opposing position. Then, in this state, the arm member 53 is fixed on the rail member 51 by the arm fixing member 52, and then the third and fourth fixing pieces 54 ', 54'' are moved by the feed screws 542, 545 to press their wedge-shaped portions 543, 546 against the opposing peripheral surfaces of the idler wheel 4.

The fixation of the idler wheel 4 is completed by the above steps, and then,
The idler wheel 3 is fixed in the same manner as described above by the fixing device 40.

In the above embodiment, the arm fixing member 52 is formed by the first and second fixing pieces 52' and 52'', but it can also be formed by a cross-sectional movable piece and one sliding body loosely connected to the rail member. The same applies to the formation thereof, and it goes without saying that known means may be employed as appropriate for the coupling means and attachment/detachment means.
Of course, in the embodiments described above, other fixing means may also be used, such as, for example, connecting the bumper of the vehicle to the platform using a wire.

Further, in the above embodiment, the wedge-shaped portion 54
In addition to the fixation by 3,546, the idler wheel may be further fixed by a belt.

That is, as shown in FIG.
5 is fixed to a wedge-shaped part 543, the other end is extended to another wedge-shaped part 546, and the end of a string 551 connected to the other end is fixed to the side surface of the horizontally long part 532 of the T-shaped arm 53. 55
2 and the belt 55 is wound around the upper half circumference of the idler wheel 4. By pulling the string 551 with an appropriate force using the ratchet mechanism 552, the idler wheel 4 is also formed into a T-shape by the belt 55. Arm 53
It will be fixed at

As described above, the present invention arranges a fixing device separately on the outside of each idler wheel, and in each fixing device, the T-shaped arm is movable in the direction of the idler wheel, and the T-shaped arm is movable in the direction of the idler wheel. Stop bodies are connected to fine adjustment feed screws on both sides of the horizontally long part of the arm to make it movable, so when transferring the vehicle to the platform, the T-shaped arm can be positioned outward to move the vehicle. It can be transferred smoothly, and in the subsequent fixing, after moving the T-shaped arm toward the idler wheel and fixing it, the stop body can be pressed in front and behind the idler wheel using the feed screw. This allows one person to easily and reliably fix the idler wheel.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a known device, Fig. 2 is a plan view showing an embodiment of the present invention, Fig. 3 is an enlarged plan view of one of the fixing devices in Fig. 2, and Fig. 4 is an A of Fig. 3. -A
5 is a sectional view taken along the line B--B in FIG. 3, and FIG. 6 is a sectional view taken along the line C--C in FIG. 3. 40, 50: Fixing device, 41, 51: Rail member, 42, 52: Arm fixing member, 43, 53:
T-shaped arm, 44, 54: Idler wheel fixing member, 5
42,545: Feed screw.

Claims (1)

[Claims] 1 This is a device that fixes each idler wheel of a four-wheeled vehicle on the stand of a chassis dynamometer.On the outside of the idler wheel, there is a rail member fixed to the stand in the front-rear direction of the four-wheeler, and a an arm fixing member that is freely movable in the front-rear direction and can be attached to and detached from the rail member; Removable T
It consists of a T-shaped arm and an idler wheel fixing member having a pair of fixing pieces that are loosely connected to the horizontally elongated part of the T-shaped arm and are moved by being engaged with feed screws provided at both ends of the arm. Idling wheel fixing device for four-wheeled vehicles.