JP2017090161A - Actual vehicle travel testing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an actual vehicle travel testing device not generating a workload error due to shifting of a shaft of a connection unit for restraining a vehicle in an actual vehicle travel test and a shaft of a wheel, having sliding resistance of the connection unit change as well by weight of the connection unit.SOLUTION: An actual vehicle travel testing device 10 includes: a pit cover 1; a plurality of rollers 2 positioned below the pit cover and connected to a dynamometer; and a restraining mechanism 3 for restraining a vehicle C by connecting a wheel hub H of the vehicle C with driving wheels mounted on the rollers 2 with the pit cover 1. The restraining mechanism 3 includes: an eccentric link 6 composed of a first rotation unit 6a connected to a shaft center H1 of a wheel hub, a second rotational unit 6b in a position separated from the first rotational unit 6a, and a link piece 6c for connecting the rotational units; two rotation fixing units 4 attached to a pit cover 1 to be freely rotatable; and two rods 5 each connected on both ends to the first rotational unit 6a and one rotation fixing unit 4, and the other rotational unit 6b and the other rotation fixing unit 4, and including a damper.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an actual vehicle traveling test apparatus that performs an actual vehicle traveling test by placing driving wheels on a plurality of rollers connected to a dynamometer.

  Drive wheels are mounted on multiple rollers connected to a dynamometer as a test device for measuring various performances of actual vehicles such as cooling performance, air conditioning performance, cold resistance performance, and noise performance in addition to actual vehicle power performance and fuel efficiency performance. Thus, an actual vehicle running test apparatus that performs an actual vehicle running test is used.

  The actual vehicle running test apparatus is placed on a plurality of rollers, which are positioned below the pit cover constituting the apparatus and connected to a dynamometer, and the vehicle tire hub and pit cover are connected by a fixing mechanism. . In this test apparatus, various measurements are carried out using a tow hook or a wheel hub while restraining the vehicle placed on the roller in a manner corresponding to the evaluation.

  The vehicle restraint method in the actual vehicle running test device is largely divided into a method of restraining the vehicle itself using a tow hook, a torque box hole, and a side sill, and a method of restraining the wheel by attaching a connecting tool (attachment) to the wheel hub. Separately, the restraint method is properly used depending on the evaluation contents.

  For example, when measuring heat flow and sound, measures must be taken so that the air flow and sound reflection around the vehicle are not obstructed by the vehicle restraint device. Method) is generally selected.

  When the vehicle restraint method is a wheel hub clamp method, there are problems of drag resistance (friction loss) due to sliding of bearings built in the wheel hub adapter and work error due to the weight of the wheel hub adapter itself. It has become.

  Due to such friction loss and work error, fuel consumption and emission measurement accuracy are reduced. In addition, since the bearing portion is not configured to receive a thrust force from the lateral movement of the vehicle, the durability of the bearing portion is reduced due to repeated loads.

  As the wheel rotates, the axis of the wheel and the axis of the connecting part connected to the wheel hub at the end of the rod are displaced, thereby changing the sliding resistance of the connecting part (bearing). Especially, when the vehicle is suddenly accelerated or decelerated, the change in sliding resistance of the connecting portion becomes more severe because the vehicle moves greatly.

  Here, Patent Document 1 includes a bearing device that is fixed to a tire hub, a fixing portion that is fixed to a floor surface, and a rod portion that is disposed between the bearing device and the fixing portion. The vehicle fixing system has a movable part movable with respect to the attachment part, and the rod part is fixed to the tire hub via a rod that can extend and retract each rod end bearing part disposed at both ends of the main body part. ing.

JP 2015-121465 A

  According to the vehicle fixing system disclosed in Patent Document 1, it is possible to suppress a downward external force applied to the vehicle.

  However, even when this system is applied, the problem described above, that is, the rod, the connecting portion at one end of the rod and connected to the wheel hub, and the other end of the rod, fixed to the pit cover. The wheel hub is firmly restrained by a restraining device composed of a fixing part, and a rotating part (bearing or the like) constituting a connecting part connected to the wheel hub is subjected to repeated loads, thereby causing the rotating part to It is not possible to solve the problem of damage.

  In addition, with the movement of the vehicle during sudden acceleration / deceleration of the vehicle on the device, the axis of the connecting part that restrains the vehicle and the axis of the wheel are shifted, thereby changing the sliding resistance of the rotating part and the connecting part. It is not possible to eliminate the work error due to the weight of the machine.

  The present invention has been made in view of the above-described problems, and includes a rod, a connecting portion that is connected to the wheel hub at one end of the rod, and a fixed portion that is fixed to the pit cover at the other end of the rod. In connection with an actual vehicle running test apparatus having a restraint mechanism composed of, the connecting part is not damaged by a repeated load acting on the connecting part during the test, and the connecting part shaft restrains the vehicle during the test. An object of the present invention is to provide an actual vehicle running test apparatus in which the wheel shaft is displaced, the sliding resistance of the connecting portion changes, and the work error does not occur due to the weight of the connecting portion.

  In order to achieve the above object, an actual vehicle running test apparatus according to the present invention includes a pit cover, a plurality of rollers positioned below the pit cover and connected to a dynamometer, and a vehicle on which driving wheels are mounted on the rollers. An actual vehicle running test apparatus comprising a restraint mechanism that restrains a vehicle by connecting a wheel hub and a pit cover, wherein the restraint mechanism includes a first rotating portion connected to an axis of the wheel hub, and a first rotation. An eccentric link composed of a second rotating part located away from the part, a link piece connecting the first rotating part and the second rotating part, and two rotations mounted rotatably on the pit cover A fixed portion, a first rotating portion of the eccentric link, one rotating fixed portion, and a second rotating portion of the eccentric link and the other rotating fixed portion, and two rods each provided with a damper. Too It is.

  The actual vehicle running test apparatus according to the present invention is characterized in that the restraint mechanism constituting the actual vehicle running test apparatus includes an eccentric link connected to the axis of the wheel hub, and the rod includes a damper. It is what has.

  The actual vehicle running test apparatus of the present invention is used for measuring various performances of an actual vehicle such as power performance, fuel consumption performance, cooling performance, air conditioning performance, cold resistance performance, and noise performance of the actual vehicle. For example, when measuring noise performance, a sound measurement microphone is disposed at an appropriate position of the pit cover.

  Here, a hydraulic cylinder, an air cylinder, etc. are mentioned as the damper incorporated in the rod which comprises a restraint mechanism.

  The restraint mechanism includes a first rotating part connected to the axis of the wheel hub, a second rotating part at a position away from the first rotating part, a link piece connecting the first rotating part and the second rotating part, An eccentric link composed of two rotation fixing portions rotatably attached to the pit cover, a first rotation portion of the eccentric link, one rotation fixing portion, a second rotation portion of the eccentric link, and the other Both ends are respectively connected to the rotation fixing part, and are composed of two rods provided with dampers.

  The two rods constituting the restraining mechanism are each equipped with a damper, so that even when a repeated load is applied to the connecting part (eccentric link) connected to the wheel hub during the actual vehicle running test, It is possible to effectively eliminate the breakage of the eccentric link.

  A connecting portion connected to the wheel hub axis; a first rotating portion connected to the wheel hub axis; a second rotating portion located away from the first rotating portion; and a first rotating portion And the link piece connecting the second rotating part, the first rotating part can coincide with the axis of the wheel hub when the wheel hub rotates.

  Further, the second rotating part moved downward by the rotation of the wheel pushes the first rotating part upward through the link piece, whereby the weight of the restraining mechanism is reduced or offset by the pushing force, and the restraining mechanism Work error due to the weight of can be eliminated.

  As can be understood from the above description, according to the actual vehicle running test apparatus of the present invention, the rod having the restraining mechanism constituting the actual vehicle running test apparatus is provided with the damper, so that the wheel hub can be used during the actual vehicle running test. Even when a load is repeatedly applied to the connected eccentric links, it is possible to effectively eliminate the breakage of the eccentric links due to the damping action by the damper.

  Furthermore, since the restraint mechanism includes an eccentric link connected to the wheel hub axis, the first rotating portion can be aligned with the wheel hub axis when the wheel hub rotates, and the first moving part moves downward. When the two rotating parts push up the first rotating part, the weight of the restraining mechanism is reduced or offset by the pushing force, and the work error due to the weight of the restraining mechanism can be eliminated.

It is a side view of the actual vehicle running test device of the present invention. It is an arrow view of the II direction of FIG. 1, and is a top view of a real vehicle running test device. (A) is the schematic diagram which showed the restraint mechanism at the time of a wheel stop, (b) is the schematic diagram which showed the restraint mechanism at the time of wheel rotation.

  Embodiments of an actual vehicle running test apparatus according to the present invention will be described below with reference to the drawings.

(Embodiment of actual vehicle running test device)
FIG. 1 is a side view of an actual vehicle running test apparatus according to the present invention, FIG. 2 is an arrow view in the direction II of FIG. 1 and is a plan view of the actual vehicle running test apparatus, and FIG. FIG. 3B is a schematic diagram showing the restraining mechanism during wheel rotation.

  The actual vehicle running test apparatus 10 shown in FIGS. 1 and 2 is used for measuring various performances of an actual vehicle such as power performance, fuel consumption performance, cooling performance, air conditioning performance, cold resistance performance, and noise performance of the actual vehicle.

  The actual vehicle running test apparatus 10 includes a pit cover 1, a plurality of rollers 2 positioned below the pit cover 1 and connected to a dynamometer, and a wheel hub H of a vehicle C on which driving wheels are mounted on the rollers 2. A restraint mechanism 3 that restrains the vehicle C by connecting the pit cover 1 is generally configured.

  In the pit cover 1, openings are provided at positions corresponding to the four rollers 2, and the wheels of the vehicle C are placed on the respective rollers 2.

  The restraining mechanism 3 includes two rotation fixing portions 4 that are rotatably attached to the pit cover 1, eccentric links 6, and two rods 5 that connect the rotation fixing portions 4 and the eccentric links 6. .

  The eccentric link 6 includes a first rotating part 6a connected to the wheel hub axis H1, a second rotating part 6b located away from the first rotating part 6a, a first rotating part 6a, and a second rotating part. And a link piece 6c connecting 6b.

  Each rod 5 is provided with a hydraulic cylinder.

  Since the two rods 5 constituting the restraining mechanism 3 are each provided with a hydraulic cylinder, a repeated load is applied to the eccentric link 6 (the first rotating portion 6a) connected to the wheel hub H in the actual vehicle running test. Even in this case, the load is relieved repeatedly by the damping action by the hydraulic cylinder.

  Further, since the first rotating portion 6a of the eccentric link 6 constituting the restraining mechanism 3 is connected to the wheel hub axis H1, the eccentric link 6 and the wheel hub axis H1 can be connected even when the wheel hub H rotates. Can be matched.

  Further, as shown in FIG. 3 (b), the second rotating part 6b moved downward by the rotation of the wheel (wheel) has a pushing force P that pushes the first rotating part 6a upward through the link piece 6c. It can be given to the single rotation part 6a.

  More specifically, when the wheel rotates, torque is generated around the first rotating portion 6a connected to the wheel hub.

  At this time, due to the contraction of the left rod 5 by the eccentric link 6 and the hydraulic cylinder built in the left rod 5 in FIG.

  Since the rod 5 is firmly fixed to the pit cover 1 via the rotation fixing portion 4, the reaction force is taken up by the pit cover 1 and the rod 5 is pushed up to the wheel hub H via the eccentric link 6. The force P is given.

  By this pushing force P, the weight W of the two restraining mechanisms 3 is reduced or offset, the work error due to the weight of the restraining mechanism 3 can be eliminated, and a high-accuracy actual vehicle running test result can be obtained. .

  In the conventional test device, the eccentric link 6 is not provided unlike the actual vehicle running test device 10 shown in the figure, so that it is not possible to generate the pushing force P. Therefore, the rod constituting the restraining mechanism provided in the conventional device. As a result of the above-mentioned weight acting on the wheel hub, the weight of the vehicle to be measured becomes larger than the actual weight of the vehicle, and the work is increased due to this increase in weight. As a result of such a large amount of work, there has been a great influence on the accuracy of vehicle fuel consumption measurement and emission measurement.

  According to the actual vehicle running test apparatus 10, since the rod 5 of the restraining mechanism 3 which is a constituent element thereof is provided with a damper, a repeated load is applied to the eccentric link 6 connected to the wheel hub H during the actual vehicle running test. Even in the case of the action, the eccentric link 6 is prevented from being damaged by the damping action by the damper. Further, since the eccentric link 6 is provided, the weight W of the restraining mechanism 3 can be offset by the pushing force P that acts on the wheel hub H from the eccentric link 6 when the wheel hub H rotates. Work error due to W can be eliminated.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Pit cover, 2 ... Roller, 3 ... Restriction mechanism, 4 ... Rotation fixing part, 5 ... Rod, 6 ... Eccentric link, 6a ... First rotation part, 6b ... Second rotation part, 6c ... Link piece, 10 ... Actual vehicle running test device, C ... vehicle, H ... wheel hub, H1 ... axis of wheel hub

Claims (1)

A pit cover, a plurality of rollers located below the pit cover and connected to a dynamometer, and a restraint mechanism that restrains the vehicle by connecting a wheel hub and a pit cover of a vehicle on which driving wheels are mounted on the rollers. In an actual vehicle running test apparatus composed of
The restraint mechanism is
A first rotating part connected to the axis of the wheel hub, a second rotating part located away from the first rotating part, and a link piece connecting the first rotating part and the second rotating part. An eccentric link,
Two rotation fixing parts rotatably mounted on the pit cover;
An actual vehicle running comprising: a first rotating part of the eccentric link, one rotating fixed part, and a second rotating part of the eccentric link and the other rotating fixed part, both ends connected to each other and two rods provided with dampers Test equipment.

Images