JPH0656750U - Chassis dynamometer - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a chassis dynamometer for mounting a vehicle on a pit cover. [Structure] A movable drum 6 movable in accordance with the length of a wheel base of a vehicle is provided on a movable base 6 movable in a pit, and supporting plates 15 to 21 movable in the front-rear direction.
In the chassis dynamometer in which the adjacent ones are superposed on each other and continuously connected by the stopper bolts 15a to 21a, the intermediate pedestal 29 extending in the length direction of the pit and supporting the support plate is connected to the movable table 6. , 30 are provided midway in the width direction of the pit, and the intermediate columns 29, 30 are slidably supported by the movable support columns 28 fixed to the movable table 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a chassis dynamometer for carrying out a running test of an automobile indoors, and is an improved support structure for a pit cover.

[0002]

[Prior art]

 The structure of a conventional chassis dynamometer will be described with reference to FIG. A fixed drum 4 on which the front wheel of the test vehicle is placed is supported on a fixed bed 2 in a pit 1 via a bearing 3, and above the fixed drum 4 a setting frame 11 having a front wheel setting hole 11a. Are installed. Further, a movable table 6 that moves left and right on the fixed bed 2 is provided, and a movable drum 8 on which the rear wheels are placed is supported on the movable table 6 via bearings 7. The screw receiver 10 of the movable table 6 is screwed onto the feed screw 9 which is linked to the motor 5. The pit cover portion in the moving section of the moving drum 8 is composed of a moving frame 12 having a rear wheel setting hole 12a, and pit covers 13 and 14 arranged on the left and right of the moving frame 12.

As shown in FIGS. 4 and 5, the pit cover 13 includes a T-shaped support plate 15, L-shaped support plates 16 and 17, a fixed plate 22 and a movable plate 23, and each support plate is a stopper. It is connected by bolts. The T-shaped support plate 15 and the L-shaped support plates 16 and 17 are connected by the stopper bolts 15b and 15a, the L-shaped support plate 16 and the fixed plate 22 are connected by the stopper bolt 16a, and the L-shaped support plate 17 is moved. The plate 23 is connected by a stopper bolt 17a. The pit cover 14 is also constructed in substantially the same manner as the pit cover 13. As shown in FIG. 6, both ends of the T-shaped support plate 15 and the like are slidably mounted on the upper surface of a rail 25 provided on a column 24 near the side wall of the pit 1.

A pair of L-shaped engaging fittings 27 are coupled to a side plate 26 of the pit cover 13 to which the moving board 23 is attached, and an upper end of the moving pillar 28 is loosely fitted between the engaging fittings 27. Are fixed to the moving table 6.

Next, the operation of the chassis dynamometer will be described. When the movable table 6 is moved to the left in FIG. 3 so as to match the wheelbase of the test vehicle, the movable plate 23 attached to the movable table 6 via the movable column 28 and the side plate 26 moves the L-shaped support plate 17 to the left. To the left, the L-shaped support plate 17 pushes the T-shaped support plate 15 to the left, and the T-shaped support plate 15 pushes the L-shaped support plate 16 to the left. Thus, the length of the pit cover 13 is reduced, while the length of the pit cover 14 is increased, and the state shown in FIG. 3 is obtained. When the pit cover 13 extends from the contracted state, the L-shaped support plate 17 is pulled to the right via the stopper bolt 17a by the movement of the moving plate 23 fixed to the side plate 26 to the right, and the L-shaped support plate By the movement of 17, the T-shaped support plate 15 is pulled rightward through the stopper bolt 15a, and the L-shaped support plate 16 is also pulled rightward sequentially through the stopper bolt 15b.

[0006]

[Problems to be solved by the device]

 However, considering that the car can be placed on the pit cover, it is necessary to increase the thickness of the support plate and the like for reinforcement, which will increase the weight of the support plate and the presence of the reinforcing member, and the inside of the pit. However, the driving means for moving the support plate and the like also needs a large driving force and a large outer shape.

Therefore, the present invention has an object to provide a chassis dynamometer which solves the above problems.

[0008]

[Means for Solving the Problems]

 The structure of the present invention for achieving such an object is to provide a movable base inside the pit formed on the floor so as to be movable in the length direction of the pit, and to match the wheelbase length of the vehicle on the movable base. A movable drum that can be moved is rotatably provided, and a plurality of support plates are provided in front and behind the movable drum in a state of being suspended on both sides of the pit, and adjacent support plates are superposed so as to be movable in the front-rear direction. Continuously, the support plate closest to the moving drum is connected to the moving base, while the support plate farthest from the moving drum extends in the pit length direction in the chassis dynamometer connected to the pit. It is characterized in that an intermediate beam supporting the supporting plate is provided midway in the width direction of the pit, and the intermediate beam is slidably supported by a moving column fixed to a moving table.

[0009]

[Action]

 When the moving drum is moved, the length of one of the pit covers is reduced and the length of the other is increased. And when the length of the pit cover becomes short, the support plates overlap. At this time, the moving column and the like also move as the moving drum moves, and the moving column and the intermediate beam slide. The weight of the support plate is transmitted to the moving column via the intermediate beam and is supported by the moving table.

[0010]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. Since the present embodiment is an improvement of a part of the conventional chassis dynamometer, the same parts as those of the prior art are designated by the same reference numerals, and the description thereof will be omitted. Only different parts will be described.

The structure of the chassis dynamometer according to the present invention is shown in FIGS. 1 (a) and 1 (b). In this embodiment, there is no fixed drum but only a moving drum, and the right end of the pit cover 14 is directly connected to the fixed plate 22. Since the pit cover-13 and the pit cover-14 have substantially the same structure, the pit cover 14 will be described here. The pit cover 14 has a T-shaped support plate 15 and L-shaped support plates 16 and 17 as in the conventional case, and the respective support plates and the like are connected by stopper bolts 15a, 15b, 16a and 17a. In addition to this, the L-shaped support plates 16 and 17 are connected to the L-shaped support plates 18 and 19 via the stopper bolts 16a and 17a, and the L-shaped support plates 18 and 19 are connected to the L-shaped support plates 18 and 19 via the stopper bolts 18a and 19a. The L-shaped support plates 20 and 21 are connected to each other, and the L-shaped support plates 20 and 21 are connected to the movable frame 12 and the fixed plate 22 via the stopper bolts 20a and 21a. With such a configuration, when the pit cover 14 is reduced in size, four support plates are vertically overlapped with each other.

Next, as shown in the right side view of the chassis dynamometer shown in FIG. 1 (b), rails 25 are fixed on the columns 24 on both sides in the pit, respectively, as in the conventional case. The T-shaped support plate 15 and the like are supported by bridging between the pair of rails 25. However, in the present invention, the T-shaped support plate 15 and the like are supported between the pair of rails 25 in order to support portions other than both ends of the T-shaped support plate 15. Two intermediate beams 29, 30 extending in the length direction of the pit are provided. Both ends of the intermediate beams 29 and 30 are supported by both ends of the pit, and the middle part in the lengthwise direction is supported by the moving column 28. The structure of support by the moving column 28 will be described below. The moving table 6 is provided with four moving columns 28 standing upright in the left-right direction. The two moving columns 28 in the center are connected to each other and the intermediate beams 29 and 30 are slid to form the intermediate beams 29 and 30. A sliding plate 32 for supporting is provided. Further, the moving columns 28 at both ends are provided with sliding plates 33 that slide on the lower surface of the rail 25 and support the rail 25. As a result, the T-shaped support plate 15 and the like are supported by the two rails 25 and the intermediate beams 29 and 30. Then, between the rail 25 and the intermediate beams 29, 30, there are provided connecting members 35, 36, 37 for connecting adjacent moving columns 28. These connecting members are, for example, as shown in FIG. 1 (a), when the T-shaped support plate 15 and the L-shaped support plates 17, 19, 21 in the pit cover 13 are overlapped with each other, I will support you.

Next, the operation of the chassis dynamometer will be described. When the moving drum 8 is moved to the left in FIG. 1A, the length of the pit cover 13 is reduced while the length of the pit cover 14 is reduced, as shown in FIG. 1A. Increases, and conversely, when moved to the right, contraction and increase are reversed. For example, when the length of the pit cover 14 becomes short, the support plates overlap each other as shown in FIGS. 2 (a) and 2 (b). This point is the same as the conventional one except that the number of supporting plates is large. At this time, the moving column 28 and the like also move with the movement of the moving drum 8, and the sliding plates 32, 33 and the intermediate beams 29, 30 or the rail 25 slide. The weight of the T-shaped support plate 15 and the like is transmitted to the support column 24 and the movable support column 28 via the rail 25 and the intermediate beams 29 and 30, and is supported by the support column 24 and the movable base 6.

Not only when the support plates and the like are completely overlapped as in the pit cover 13 shown in FIG. 1A, but also when the support plates and the like are overlapped only at the ends as in the pit cover 14. Even if there is, the load is shared by a plurality of support plates, etc., so that a large load can be tolerated even when a partial load such as an automobile tire is applied.

[0015]

[Effect of device]

 As can be seen from the above description, according to the chassis dynamometer of the present invention, an intermediate beam that extends in the length direction of the pit and supports the support plate is provided midway in the width direction of the pit and is fixed to the moving base. Since the intermediate beam is slidably supported by the movable column, the thickness of the support plate may be small and the reinforcement may be small. Therefore, the chassis dynamometer structure is simple and the cost is low. Furthermore, since the reinforcement of the pit can be sufficiently maintained, the strength will not be insufficient even if the length of the pit is increased. Furthermore, since the height of the intermediate beam can be made smaller than that of the reinforcing member as compared with the case where a reinforcing member is provided on the supporting plate for reinforcing the supporting plate, the pit space can be increased.

[Brief description of drawings]

FIG. 1 is a front view and FIG. 1B is a right side view of an embodiment of a chassis dynamometer according to the present invention.

2 shows a chassis dynamometer according to the present invention, FIG. 2 (a) is a front view showing a part of a pit cover, FIG.
(B) is a bottom view.

FIG. 3 is a front view showing a conventional chassis dynamometer.

FIG. 4 is a partially enlarged view of FIG. 3 relating to a conventional chassis dynamometer.

FIG. 5 is a plan view of FIG. 4 showing a conventional chassis dynamometer.

FIG. 6 relates to a conventional chassis dynamometer and is shown in FIG.
-A arrow view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pit 6 ... Moving base 8 ... Moving drum 13,14 ... Pit cover 15 ... T-type support plate 16-21 ... L-type support plate 15a, 15b, 16a-21a ... Stopper bolt 25 ... Rail 28 ... Moving support 29, 30 ... Intermediate beam

Claims (1)

[Scope of utility model registration request] 1. A movable base movable in the length direction of the pit is provided inside a pit formed on the floor, and a movable drum movable on the movable base according to the length of a wheel base of a vehicle is rotated. It is possible to provide it, and a plurality of support plates are provided in front of and behind the moving drum in a state of being suspended on both sides of the pit. In the chassis dynamometer, the support plate farthest from the moving drum is connected to the moving base while the nearby support plate is connected to the moving base. A chassis dynamometer characterized in that an intermediate beam is slidably supported by a moving column fixed to a moving table in the middle of the pit in the width direction.