chassis dynamometer

Abstract

A support mechanism (S) of a chassis dynamometer (CD) has a tilting support portion (2) disposed below a load motor (M) and supporting the load motor (M) so as to be tiltable in the axial direction of a rotation axis (M1) of the load motor (M) with respect to the vertical direction, a rotary support portion (3) disposed below the load motor (M) and supporting the load motor (M) so as to be rotatable in the x-y plane, a mounting frame (4) disposed below the load motor (M) and coupled to the load motor (M) by the tilting support portion (2), a movable stage (1) disposed directly below the mounting frame (4) and coupled to the mounting frame (4) by the rotary support portion (3), and a sliding portion (5) disposed directly below each of the x-axis direction end portions of the movable stage (1) and capable of sliding the movable stage (1) in both the x-axis direction and the y-axis direction.

Description

Technical Field

[0001] The present invention relates to a chassis dynamometer, comprising: a load motor having a rotor and a stator built into a housing, wherein the housing is housed within the wheel house of the vehicle when the rotor is connected to the drive wheel connection of the vehicle, and a torque equal to the torque applied to the drive wheel connection of the vehicle is applied to the drive wheel connection of the vehicle; and a support mechanism for mounting the load motor and enabling the load motor to perform the same action as the drive wheel movement during vehicle steering. Background Technology

[0002] Previously, as a chassis dynamometer, the applicant of this application proposed the following structure, in which the length direction of the vehicle is defined as the x-axis direction and the width direction as the y-axis direction. The frame constituting the support mechanism includes: a mounting frame for fixing the load motor; and a base positioned lower than the mounting frame. Between the mounting frame and the base, in series connection, are clamped: a first movable platform that can slide freely in one direction of the x-axis and y-axis directions, a second movable platform that can slide freely in the other direction of the x-axis and y-axis directions, and a spherical joint that can tilt and rotate freely in any direction (for example, see Patent Document 1).

[0003] However, during vehicle driving tests, when the load motor rotates, a reverse torque is generated in the opposite direction of the load motor's rotation. This reverse torque, along with a radial load, acts on the spherical joint. It has been newly discovered that because the radial load is directed in the same direction as the spherical joint's movement, if the radial load increases to a certain extent, the inner cylinder of the spherical joint may extend beyond the collar, potentially causing it to malfunction and fail to function as a spherical joint.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: International Publication No. 2019 / 215864 Summary of the Invention

[0007] In view of the above problems, the present invention aims to provide a chassis dynamometer that, regardless of the reverse torque generated when the load motor rotates, the support mechanism can reliably realize the tilting and rotation of the load motor.

[0008] To address the aforementioned issues, the present invention relates to a chassis dynamometer, comprising: a load motor having a rotor and a stator built into a housing, wherein the housing is housed within the wheel arch of the vehicle when the rotor is connected to a drive wheel connection of the vehicle, and a torque equal to the torque applied to the drive wheel connection of the vehicle is applied to the drive wheel connection; and a support mechanism for mounting the load motor and enabling the load motor to perform the same action as the drive wheel movement during vehicle steering, characterized in that the length direction of the vehicle is defined as the x-axis direction and the width direction as the y-axis direction, and the support mechanism comprising: a tilting support portion disposed below the load motor and supporting the load motor so as to tilt freely in the direction of the axis of rotation of the load motor relative to the vertical direction; a rotating support portion disposed below the load motor and supporting the load motor so as to rotate freely in the x-y plane; a mounting frame disposed below the load motor and connected to the load motor by means of the tilting support portion; and a movable platform located on the chassis. The mounting frame is located directly below the mounting frame and connected to it via a rotating support; and a sliding part is disposed directly below each of the two ends of the movable platform in the x-axis direction, allowing the movable platform to slide in both the x-axis and y-axis directions. The load motor is positioned in a neutral position with its rotation axis parallel to the y-axis. The tilting support includes: a tilting shaft protruding from and extending along the x-axis from feet perpendicularly disposed at both ends of the load motor; a first bearing supporting each tilting shaft and disposed on the mounting frame; and a first restoring mechanism that restores the tilted load motor to a neutral position. The rotating support includes: a rotating shaft perpendicularly disposed at the center of both the x-axis and y-axis directions of the mounting frame when the load motor is in a neutral position; and a second bearing supporting the rotating shaft perpendicularly disposed at the center of both the x-axis and y-axis directions of the movable platform when the load motor is in a neutral position.

[0009] According to the present invention, without using a spherical joint, both the tilting support and the rotating support of the support mechanism are not affected by the radial load of the reverse torque generated by the rotation of the load motor. Therefore, the support mechanism can reliably realize the tilting and rotation of the load motor.

[0010] In this invention, preferably, the first recovery mechanism comprises: a fixed unit having a pair of first inclined plates extending obliquely upward toward one side and the other side in the y-axis direction when the load motor is in a neutral position, and fixed to one side and the other side in the x-axis direction of the mounting frame; a movable unit having a second inclined plate opposite to each of the first inclined plates of the fixed unit, and fixed to the foot of the load motor and tilting together with the load motor; and an elastic member sandwiched between each of the first inclined plates of the fixed unit and each of the second inclined plates of the movable unit. When the movable unit tilts with the tilting of the load motor, the elastic member is compressed between each of the first and second inclined plates, thereby generating an elastic force. When the elastic force is released, the elastic member restores the load motor to a neutral position. Accordingly, the support mechanism can automatically restore the load motor to a neutral position, and the structure of the first recovery mechanism can be simplified.

[0011] In this invention, preferably, the sliding part includes a second recovery mechanism that applies a return force in the opposite direction of the sliding direction of the movable platform when the movable platform slides in the x-axis and y-axis directions. This second recovery mechanism restores the movable platform to its neutral position before sliding. Therefore, even if the movable platform is slid in at least one direction (x-axis or y-axis) after the load motor is installed or after vehicle performance testing, the movable platform can automatically return to its neutral position before sliding. Consequently, regarding the support mechanism, labor can be saved in restoring the movable platform to its neutral position after the load motor is installed or after vehicle performance testing. Attached Figure Description

[0012] Figure 1 This is a partial sectional front view that schematically illustrates one embodiment of the chassis dynamometer device of the present invention.

[0013] Figure 2 yes Figure 1 A partial sectional side view of the chassis dynamometer device shown.

[0014] Figure 3 It is Figure 1 The diagram shows a portion of the tilting support of the chassis dynamometer and the foot of the load motor.

[0015] Figure 4 This is an example. Figure 2 A partial sectional perspective view of the tilting state of the load motor of the chassis dynamometer device shown.

[0016] Figure 5 (a) is shown Figure 1The side view of the main part of the second recovery mechanism of the sliding part on the x-axis side of the chassis dynamometer shown. Figure 5 (b) is shown Figure 1 When the load motor slides to one side in the x-axis direction as shown Figure 5 (a) is a side view of the main part of the second recovery mechanism shown. Detailed Implementation

[0017] Reference Figure 1 and Figure 2 The chassis dynamometer CD will be described below. The chassis dynamometer CD includes: a load motor M; and a support mechanism S for mounting the load motor M. The load motor M is connected to the drive wheel connection of a vehicle (not shown). Therefore, in the following description, the length direction of the vehicle is defined as the x-axis direction, and the width direction as the y-axis direction. The load motor M has a rotor (not shown) and a stator built into a housing M0. A magnet is provided on the rotor, and a coil powered externally from the load motor M is wound and mounted on the stator. When the load motor M is connected to the drive wheel connection of the vehicle, the rotor is connected to the rotation shaft M1 of the load motor M, and is connected to the drive wheel connection of the vehicle via the rotation shaft M1. With the rotor connected to the drive wheel connection of the vehicle, the housing M0 is housed within the wheel arch of the vehicle. This load motor M applies a torque equal to the torque applied to the drive wheel connection of the vehicle.

[0018] When no external force is applied to the load motor M, the axis of the rotating shaft M1 is in a neutral position parallel to the y-axis, and the movable platform 1, which slides in both the x-axis and y-axis directions, is in a neutral position where it does not slide in any direction.

[0019] The support mechanism S supports the load motor M in a manner that allows it to tilt freely along the axis of the rotation shaft M1 in the vertical direction and to rotate freely in the x-y plane. Specifically, the support mechanism S includes: a tilting support 2, which is disposed below the load motor M and supports the load motor M to tilt freely as described above; and a rotating support 3, which is disposed below the load motor M and supports the load motor M to rotate freely in the x-y plane. In addition, the support mechanism S includes: a mounting frame 4, which is disposed below the load motor M and connected to the load motor M via the tilting support 2; and a movable platform 1, which is disposed directly below the mounting frame 4 and connected to the mounting frame 4 via the rotating support 3. Furthermore, the support mechanism S includes: a sliding part 5 disposed directly below each of the two ends of the movable platform 1 in the x-axis direction and capable of sliding the movable platform 1 as described above.

[0020] The tilting support 2 includes: tilting shafts 21, which protrude from feet M2, M2 respectively, which are vertically disposed at both ends of the load motor M in the x-axis direction and extend along the x-axis direction; a first bearing 22, which supports each tilting shaft 21 and is disposed on the mounting frame 4; and a first restoring mechanism 23, which restores the load motor M to a neutral position after tilting. The mounting frame 4 is provided with a bottom wall 41 and an outer peripheral wall 42 that rises upward from the outer periphery of the bottom wall 41. The first bearing 22 is assembled inside the portions 42a located at both ends of the outer peripheral wall 42 in the x-axis direction. The tilting shafts 21 are embedded within the first bearing 22.

[0021] The rotating support 3 includes: a rotating shaft 31, which is perpendicularly disposed at the center of the bottom wall 41 of the mounting frame 4 in both the x-axis and y-axis directions; and a second bearing 32, which supports the rotating shaft 31 and is perpendicularly disposed at the center of the movable platform 1 in both the x-axis and y-axis directions. A circular hole 11 with a stepped portion 11a descending one layer is provided in the upper half of the movable platform 1 at the center of both the x-axis and y-axis directions. A cylindrical outer shell 12 with a flange portion 12a at its upper end is fitted into the lower half of the circular hole 11 such that the flange portion 12a is housed in the stepped portion 11a of the circular hole 11, and protrudes downward from the circular hole 11. The protruding length of the outer shell 12 is less than the height of the sliding portion 5. An annular plate 12b protruding radially inward is provided inside the outer shell 12 at its lower end. The second bearing 32 is embedded in the outer shell 12 such that its lower end rests on the annular plate 12b. The upper end of the rotating shaft 31 is engaged with the lower end of the bottom wall 41 of the mounting frame 4 at the center of both the x-axis and y-axis directions, and the rotating shaft 31 is embedded in the second bearing 32. The lower end of the housing 12 is closed by the cover 12c.

[0022] Each first recovery mechanism 23 includes: a fixed unit 231 having a pair of first tilting plates 231a extending obliquely upwards and facing one side and the other side of the y-axis direction, respectively, and fixed to one side and the other side of the bottom wall 41 of the mounting frame 4 in the x-axis direction; and a movable unit 232 having second tilting plates 232a opposite to the first tilting plates 231a of the fixed unit 231, and fixed to the foot M2 of the load motor M and tilting together with the load motor M. Furthermore, each first recovery mechanism 23 includes an elastic member 233 sandwiched between the first tilting plates 231a of the fixed unit 231 and the second tilting plates 232a of the movable unit 232. When the movable unit 23 tilts with the load motor M, the elastic member 233 is compressed between the first tilting plates 231a and the second tilting plates 232a, thereby generating a spring force in the elastic member 233. When the elastic force is released, the elastic member 233 returns the load motor M to a neutral position. The elastic member 233 may be, for example, a rubber bushing.

[0023] Specifically, the fixing unit 231 of each first recovery mechanism 23 engages with the upper surface of the bottom wall 41 of the mounting frame 4 via a rectangular plate 231b. The plate 231b is disposed between the lower ends of each first tilting piece 231a. An elastic member 233 is fixed to the inner surface of each first tilting piece 231a on the side of the foot M2 of the load motor M, and protrudes toward the second tilting piece 232a of each movable unit 232. Two elastic members 233 are provided and are arranged side by side in a stepped manner in the x-axis direction. In this embodiment, regarding each first tilting piece 231a, in order to avoid contact when the load motor M rotates, the upper end near the axis side of the rotation shaft 31 of the rotation support 3 is cut off toward the bottom wall 41 of the mounting frame 4 and obliquely downward to form a notch 231a1.

[0024] Also refer to Figure 3 Regarding the movable unit 232 of each of the first recovery mechanisms 23, each of the second tilting plates 232a is formed as a single unit and has a V-shaped shape when viewed from the side. Regarding each movable unit 232, considering the rotational trajectory of the load motor M in the x-y plane, a notch 232a1 is formed at the upper end of each of the second tilting plates 232a near the axis of the rotation shaft 31 of the rotation support 3. The notch 232a1 includes a stepped portion 232a. 11 It is located on the side of the portion without a notch 232a1 and is one layer lower than that portion; and the inclined portion 232a 12 From step 232a 11 The base wall 41 of the mounting frame 4 is inclined downwards. One of the two elastic members 233 of the first inclined piece 231a fixed to each fixed unit 231 is configured to face the portion other than the notch 232a1 of the second inclined piece 232a of each movable unit 232, and the other elastic member 233 is configured to face the second inclined piece 232 at a position lower than the elastic member 233 fixed to the portion other than the notch 231a1 in the portion where the notch 232a1 is formed.

[0025] The lower end of each foot M2 of the load motor M is divided into an upper part M21 and a lower part M22. A rectangular flange M23 of the same size, extending along the y-axis, is provided at the lower end of the upper part M21 and the upper end of the lower part M22. The upper part M21 and the lower part M22 overlap with each flange M23 and are fastened together using bolts B. Furthermore, a main body M22a located directly below the flange M23 of the lower part M22 is disposed at both ends of the bottom wall 41 of the mounting frame 4 in the x-axis direction and is formed as a semi-circular plate. The tilting shaft 21 of each tilting support 2 is integrally formed with the main body M22a of each foot M22 and protrudes toward the portions 42a located at both ends of the outer peripheral wall 42 of the mounting frame 4 in the x-axis direction. Furthermore, the movable unit 232 of each of the first recovery mechanisms 23 is integrally formed with the main body 22a at the portion of the upper end of each of the second inclined plates 232a without notches 232a1 on the side of the main body M22a. Moreover, regarding each of the second recovery mechanisms 23, when the load motor M is in a neutral position, the surfaces of each of the second inclined plates 232a of the movable unit 232 that face each of the inclined plates 231a of the fixed unit 231 do not compress the protruding ends of the elastic member 233, but only contact the protruding ends of the elastic member 233.

[0026] Reference Figure 4 When assembling or disassembling the load motor M relative to the drive wheel connection of the vehicle, or during vehicle performance testing, if the load motor M tilts clockwise, the lower portion M22 of each foot M2 of the load motor M tilts clockwise around the axis of the tilting shaft 21 of each tilting support 2, just like the load motor M. Therefore, each movable unit 232, which is integral with the main body M22a of the lower portion M22, also tilts clockwise, just like the load motor M. At this time, a second tilting piece 232a of each movable unit 232 compresses two elastic members 233, 233 fixed to a first tilting piece 231a of each fixed unit 231 opposite it, thereby causing the two elastic members 233, 233 to generate elastic force. When the clockwise tilting of the load motor M ends, the elastic force generated by the two elastic components 233, 233 is released, causing one of the second tilting plates 232a of each movable unit 232 to be pressed back in the counterclockwise direction, and the load motor M returns to a neutral position as a result of this pressing back. The same applies to the tilting of the load motor M from a neutral position and its return to a neutral position, causing the load motor M to tilt in the counterclockwise direction.

[0027] Regarding the chassis dynamometer CD of this embodiment, the support mechanism S for the load motor M does not employ a spherical joint. Each tilting support 2 supports the load motor M so that it can tilt freely relative to the vertical direction in the axial direction of the rotation axis M1 of the load motor M, and the rotation support 3 of the support mechanism S supports the load motor M so that it can rotate freely in the x-y plane. That is, the tilting shaft 21 of each tilting support 2 extends along the x-axis direction, and the rotation shaft 31 of the rotation support 3 extends along the vertical direction. Therefore, neither the tilting support 2 nor the rotation support 3 of the support mechanism S is affected by the radial load of the reverse torque generated by the rotation of the load motor M. Therefore, the support mechanism S can reliably realize the tilting and rotation of the load motor M.

[0028] Furthermore, each of the first recovery mechanisms 23 includes the fixed unit 231, the movable unit 232, and the elastic members 233, 233 as described above. Therefore, the support mechanism S can automatically restore the load motor M to a neutral position and can simplify the structure of the first recovery mechanism 23. In addition, it does not hinder the rotation of the load motor M.

[0029] Return to Figure 1 and Figure 2 Each sliding part 5 of the support mechanism S includes a first sliding platform 51 and a second sliding platform 52. Four guide rails 51a, longer in the y-axis direction, are fixed to the upper surface of the first sliding platform 51 at predetermined intervals. A sliding member 51b, slidable along its length, is provided above each guide rail 51a. The movable platform 1 is placed above a total of eight sliding members 51b and is slidable along the y-axis. Four guide rails 52a, longer in the x-axis direction, are fixed to the upper surface of the second sliding platform 52 at predetermined intervals. A sliding member 52b, slidable along its length, is also provided above each guide rail 52a. The first sliding platform 51 is placed above a total of eight sliding members 52b and is slidable along the x-axis. Therefore, the movable platform 1 can slide freely in the x-axis direction. In this way, each sliding part 5 can make the movable platform 1 slide in both the x-axis and y-axis directions. Similarly, the mounting frame 4, which is connected to the movable platform 1 by means of the rotating support part 22, can also slide in both the x-axis and y-axis directions. As a result, the load motor M can slide in both the x-axis and y-axis directions.

[0030] Furthermore, each sliding part 5 has a second sliding table 52 which is fixed above a mounting platform 6 at a predetermined position on the floor or other surface of the test site during the vehicle operation test.

[0031] Furthermore, each sliding part 5 has a notch 53 formed by cutting downward from the center of the upper surface of the first sliding platform 51 and the second sliding platform 52, which is equipped with a second recovery mechanism 54. When the movable platform 1 slides in the x-axis and y-axis directions, the second recovery mechanism 54 applies a push-back force in the opposite direction to the sliding direction of the movable platform 1. The second recovery mechanism 54 restores the movable platform 1 to its neutral position before sliding in the x-axis and y-axis directions.

[0032] Reference Figure 5 (a) and (b) describe the second recovery agency 54. Furthermore, Figure 5 The second recovery mechanism 54 shown in (a) and (b) is equipped with Figure 1 The image shows one end of the movable stage 1 located along the x-axis. Figure 1 The sliding part 5 at the left end. Regarding the sliding part 5 located at the other end (right end) in the x-axis direction of the movable platform 1, the second restoring mechanism 54 is configured to be symmetrical about the axis of rotation of the rotation support 31 as the axis of symmetry. Figure 5 The second recovery mechanism 54 shown in (a) and (b) is symmetrical about the left and right.

[0033] On the lower surface of the first sliding platform 51, from the location near Figure 1 A first fixing plate 51c protrudes downward from the side of the rotating support portion 3 shown. The lower end of the first fixing plate 51c does not contact the lower end face of the notch portion 53. Furthermore, an elongated hole 51c1 extending in the x-axis direction is provided in the first fixing plate 51c along the y-axis direction. On the other hand, a second fixing plate 52c protrudes upward from the portion located away from the rotating support portion 3 on the upper surface of the second sliding table 52. The upper end of the second fixing plate 52c does not contact the lower surface of the first sliding table 51. An air damper 54a is used for the second recovery mechanism 54. The air damper 54a includes: a cylinder 54a1, which is longer in the x-axis direction; a piston rod 54a2, which moves in and out relative to the cylinder 54a1; and a head 54a3, which is provided at the end portion of the piston rod 54a2 located opposite to the cylinder 54a1. The end portion 54a of the cylinder 54a1 located opposite to the head 54a3... 11 It is fixed to the second fixing plate 52c by means of the first pin 7. In addition, a second pin 8 is provided in the head 54a3, which can move in the length direction within the elongated hole 51c1 of the first fixing plate 51c and can be inserted in the y-axis direction.

[0034] when Figure 1 The movable stage 1 shown is positioned on one side of the x-axis ( Figure 1 When sliding on the left side, as Figure 5As shown in (b), the first sliding stage 51 of the support portion 5 slides in the same direction as the movable stage 1. At this time, at the other end of the second pin 8 and the elongated hole 51c1 in the x-axis direction ( Figure 5 With the right end in contact, the head 54a3 moves to one side in the x-axis direction, and the piston rod 54a3 enters the interior of the cylinder 54a1, thereby increasing the internal pressure of the cylinder 54a1. The sliding limit of the movable platform 1 in the x-axis direction is until the head 54a3 contacts the cylinder 54a1. When the vehicle performance test ends and the sliding of the movable platform 1 stops, the internal pressure of the cylinder 54a1 causes the head 54a3 to be pushed back to the other side in the x-axis direction, and the movable platform 1 returns to its original position. Figure 5 The neutral position is shown in (a).

[0035] Regarding the location Figure 1 The other side of the x-axis direction shown ( Figure 1 The sliding part 5 on the right side, when the movable stage 1 moves to the other side of the x-axis ( Figure 1 When the right side slides, the air damper 54a, which is the second recovery mechanism 54, performs its operation as described above, and when the sliding stops, it restores the movable platform 1 to the neutral position. On the other hand, regarding Figure 5 As shown in (a) and (b), the sliding part 5, the second pin 8 only extends from one end to the other end in the x-axis direction within the elongated hole 51c1 (from...). Figure 5 As shown in (a) and (b), when the right end moves to the left end, the piston rod 54a2 will not enter the cylinder 54a1. Therefore, regarding Figure 5 As shown in (a) and (b), the air damper 54a, which serves as the recovery mechanism 54, does not change the internal pressure of the cylinder 54a1. Thus, when the movable stage 1 slides to one side and the other side in the x-axis direction, the air damper 54a, which serves as the second recovery mechanism 54, provided in either of the sliding parts 5, allows the movable stage 1 to return to the neutral position.

[0036] Regarding movable platform 1, such as Figure 1 As shown, a structure identical to that of the first fixed plate 51c protrudes from the portion corresponding to the notch 53 formed in the first sliding table 51, and a structure identical to that of the second fixed plate 52c protrudes from the first sliding table 51. An air damper 54a, serving as the second recovery mechanism 54, is provided in the notch 53 of the first sliding table 51 in the same manner as described above. Therefore, the movable platform 1 slides in the y-axis direction and recovers to the neutral position in the same manner as described above.

[0037] Each sliding part 5 is equipped with the second recovery mechanism 54 as described above. Therefore, even if the movable platform 1 slides in at least one direction, either the x-axis or y-axis, after the load motor M is installed or after a vehicle performance test, the movable platform 1 can automatically return to its neutral position before sliding. Thus, regarding the support mechanism S, labor can be saved in restoring the movable platform 1 to its neutral position after the load motor M is installed or after a vehicle performance test.

[0038] As described above, embodiments of the present invention have been explained with reference to the accompanying drawings; however, the present invention is not limited thereto. For example, the structure, configuration, and number of elastic members 233 are not particularly limited, exemplified by the shapes of the first inclined plate 231a of each fixed unit 231 and the second inclined plate 232a of each movable unit 232. Furthermore, regarding the second restoring mechanism 54, in addition to the air damper 54a, suitable components that generate elastic force, such as springs, can be selected.

[0039] Explanation of reference numerals in the attached figures

[0040] CD… Chassis dynamometer; M… Load motor; M1… Rotary shaft; M2… Foot; S… Support mechanism; 1… Movable platform; 2… Tilting support; 21… Tilting shaft; 22… First bearing; 23… First recovery mechanism; 231… Fixed unit; 231a… First tilting plate; 232… Movable unit; 232a… Second tilting plate; 233… Elastic component; 3… Rotating support; 31… Rotating shaft; 32… Second bearing; 4… Mounting frame; 5… Sliding part; 54… Second recovery mechanism.

Claims

1. A chassis dynamometer, comprising: a load motor having a rotor and a stator built into a housing, wherein the housing is housed within a wheel arch of the vehicle when the rotor is connected to a drive wheel connection of the vehicle, and the load motor applies a torque equal to the torque applied to the drive wheel connection of the vehicle; and a support mechanism for mounting the load motor and enabling the load motor to perform the same action as the drive wheel movement during vehicle steering. Its features are, Define the length of the car as the x-axis and the width as the y-axis. The support mechanism includes: a tilting support disposed below the load motor and supporting the load motor so that it can tilt freely relative to the vertical direction in the direction of the axis of rotation of the load motor; a rotating support disposed below the load motor and supporting the load motor so that it can rotate freely in the x-y plane; a mounting frame disposed below the load motor and connected to the load motor by means of the tilting support; and a movable platform located directly below the mounting frame and connected to the mounting frame by means of the rotating support. And a sliding part, which is disposed directly below each of the two ends of the movable stage in the x-axis direction, and allows the movable stage to slide in both the x-axis and y-axis directions. The attitude of a load motor in which the axis of rotation is parallel to the y-axis is defined as the neutral attitude of the load motor. The tilting support includes: tilting shafts, each protruding from and perpendicularly positioned at both ends of the load motor along the x-axis and extending along the x-axis; a first bearing supporting each tilting shaft and mounted on a mounting frame; and a first restoration mechanism that restores the tilted load motor to a neutral position. The rotating support includes: a rotating shaft, which is perpendicularly disposed at the center of the mounting frame in both the x-axis and y-axis directions when the load motor is in a neutral position; and a second bearing, which supports the rotating shaft in both the x-axis and y-axis directions when the load motor is in a neutral position and is perpendicularly disposed at the center of the movable platform in both the x-axis and y-axis directions.

2. The chassis dynamometer device according to claim 1, characterized in that, The first recovery mechanism comprises: a fixing unit having a pair of first tilting plates extending obliquely upwards and towards one side and the other side in the y-axis direction respectively when the load motor is in a neutral position, and fixed to one side and the other side in the x-axis direction of the mounting frame respectively; a movable unit having second tilting plates opposite to the first tilting plates of each fixing unit, and fixed to the feet of the load motor and tilting together with the load motor; and an elastic member sandwiched between the first tilting plates of each fixing unit and the second tilting plates of each movable unit. When each movable unit tilts with the tilting of the load motor, the elastic member is compressed between each of the first tilting plates and each of the second tilting plates, thereby generating elastic force in the elastic member. When the elastic force is released, the elastic member restores the load motor to a neutral position.

3. The chassis dynamometer according to claim 1 or 2, characterized in that, The sliding part includes a second recovery mechanism that, when the movable platform slides in the x-axis and y-axis directions, applies a return force in the opposite direction to the sliding direction of the movable platform to the movable platform. The second recovery mechanism restores the movable stage, which has slid in the x-axis and y-axis directions, to its neutral position before sliding.

Images