Fixing devices, test systems, and fixing methods

Abstract

To provide a fixing device that can secure a two-wheeled or three-wheeled vehicle on a chassis roller. [Solution] A fixing device for fixing a test specimen, which is a two-wheeled or three-wheeled vehicle, on a chassis roller, comprising: a base portion installed on the floor surface straddling the chassis roller; a front wheel support mechanism provided on the base portion that restricts the movement of the front wheel of the test specimen and has a front wheel support portion that contacts and supports the front wheel; and a lifting prevention mechanism provided on the base portion that prevents the two-wheeled vehicle body from lifting and has a vehicle body pressing portion that is slidable in the vertical direction and presses down on the vehicle body from above.

Description

Technical Field

[0001] The present invention relates to a fixing device for fixing a two-wheeled vehicle or a three-wheeled vehicle to a chassis roller, a test system using the fixing device, and a fixing method.

Background Art

[0002] Conventionally, a chassis dynamometer has been used to test the performance of a test vehicle such as a four-wheeled automobile by simulating running under the same conditions as on-road driving. The driving wheels of the test vehicle are placed on the chassis rollers provided in the chassis dynamometer, and a running test simulating on-road driving is performed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in recent years, there has been a desire to test the performance of two-wheeled vehicles such as electric scooters using a chassis dynamometer. When testing a two-wheeled vehicle using a chassis dynamometer, since the two-wheeled vehicle cannot maintain its self-supporting posture without a driver, it is necessary to hold the two-wheeled vehicle with its rear wheel placed on the chassis roller in that state. Also, even in the case of a three-wheeled vehicle such as a three-wheeled electric scooter, since its posture during running is unstable without a driver, there is a desire to hold the posture in the state where the driving wheels are placed on the chassis roller, similar to the two-wheeled vehicle.

[0005] Although different from a chassis roller, a fixing device for securing a two-wheeled test vehicle onto a roller is known, as shown in Patent Document 1. However, this device requires assembling a frame that surrounds the two-wheeled vehicle on the roller from the front, rear, and above, resulting in a large-scale device configuration that is not suitable for installation in the limited space of a test chamber equipped with a chassis roller.

[0006] This invention was made to solve the above-mentioned problems, and its primary objective is to provide a fixing device that can secure a two-wheeled or three-wheeled vehicle on a chassis roller. [Means for solving the problem]

[0007] In other words, the fixing device according to the present invention is for fixing a test specimen, which is a two-wheeled or three-wheeled vehicle, on a chassis roller, and is characterized by comprising: a base portion installed on the floor surface straddling the chassis roller; a front wheel support mechanism provided on the base portion that restricts the movement of the front wheels of the test specimen and has a front wheel support portion that contacts and supports the front wheels; and a lifting prevention mechanism provided on the base portion that prevents the vehicle body of the test specimen from lifting and has a vehicle body pressing portion that is slidable in the vertical direction and presses down on the vehicle body from above.

[0008] With this configuration, the front wheel support mechanism and the anti-lift mechanism are installed on a base mounted on the floor, eliminating the need to assemble a frame that surrounds the test specimen from the front, rear, and above. Furthermore, the front wheel support mechanism restricts the movement of the front wheels of the test specimen, preventing them from turning or flying off. Additionally, the anti-lift mechanism holds down the body of the test specimen from above, preventing it from lifting and maintaining its posture, thus fixing the test specimen on the chassis rollers. Furthermore, since the front wheel support section is slidable in the front-to-back direction and the body retaining section is slidable in the up-to-down direction, various sizes of test specimens can be fixed on the chassis roller by adjusting the positions of the front wheel support section and the body retaining section.

[0009] Furthermore, a specific embodiment of the fixing device is one in which the anti-floating mechanism comprises a pair of left and right support members extending upward from the base, a clamp member attached across the pair of support members, and an up-and-down sliding mechanism interposed between the pair of support members and the clamp member, which connects the clamp member to the pair of support members so as to be slidable in the up-and-down direction, and the vehicle body holding portion is formed by the lower surface of the clamp member. In this way, the lower surfaces of the clamp members extending to the left and right can apply even force downwards to, for example, the seat portion of the vehicle body, preventing it from lifting up while firmly maintaining the vehicle's posture.

[0010] Furthermore, it is preferable that the fixing device includes a front-to-back sliding mechanism in which the anti-floating mechanism is interposed between the pair of support members and the base portion, and the pair of support members are slidably connected to the base portion in the front-to-back direction. In this way, the front-to-rear position of the vehicle body retainer can be adjusted to match the center of gravity of the test specimen, allowing for more stable maintenance of the test specimen's posture.

[0011] Furthermore, the fixing device is provided on the base portion and prevents the vehicle body of the test specimen from swaying laterally. Preferably, it further includes a vehicle body support portion that is slidable in the left-right direction and contacts and supports both sides of the vehicle body, thereby preventing lateral swaying of the vehicle body. In this way, the vehicle body is supported from both sides by the vehicle body support section, allowing for a more stable posture of the vehicle body.

[0012] Furthermore, a specific embodiment of the fixing device is one in which the lateral sway prevention mechanism comprises a pair of left and right support members extending upward from the base, a pair of left and right arm members attached to the pair of support members so as to face each other, and a left and right sliding mechanism interposed between the pair of support members and the pair of arm members to slide the arm members in the left and right directions relative to the pair of support members, and the vehicle body support portion is formed by the tips of the pair of arm members.

[0013] Furthermore, it is preferable that the fixing device includes a pair of support members that are common to both the anti-floating mechanism and the anti-lateral sway mechanism. In this way, by using a common support member for both the anti-float mechanism and the anti-lateral sway mechanism, the number of parts can be reduced, making the device configuration more compact.

[0014] Preferably, the fixing device has a base portion comprising a frame surrounding the chassis roller and a fixing mechanism for fixing the frame to the floor surface. In this way, the frame can be fixed to the floor using a fixing mechanism, eliminating the need for the base supporting the front wheel support mechanism and anti-lift mechanism to be heavy and sturdy, making it possible to make it lightweight and compact. This allows for a simpler fixing mechanism, making it more suitable for installation on a chassis roller.

[0015] Furthermore, the fixing device preferably comprises a fixing mechanism which includes a bracket component that connects the frame and the floor surface, and fixing holes for fixing the bracket component to the frame, and the frame preferably has a plurality of such fixing holes along its circumferential direction. In this way, multiple fixing holes are provided along the periphery of the frame, making it possible to change the fixing mechanism to various positions depending on the environment of the floor surface of the test room.

[0016] Furthermore, it is preferable that the fixing device has a base portion that includes a plurality of height-adjustable legs attached to the frame along the circumferential direction. In this way, the frame can be lifted off the floor by the legs, preventing interference between the chassis rollers and the frame in a limited floor space.

[0017] Furthermore, the fixing device preferably comprises a front wheel support mechanism having a stopper member having a front facing surface that faces the front of the front wheel, a holding member that connects the base portion and the stopper member and holds the stopper member in a predetermined position, and a front-to-back sliding mechanism interposed between the holding member and the base portion that connects the holding member so as to be slidable in the front-to-back direction relative to the base portion, and the front wheel support portion is preferably formed by the front facing surface of the stopper member. In this way, the front wheels of the test specimen can be prevented from flying out by the forward-facing surface of the stopper member.

[0018] Furthermore, it is preferable that the fixing device has a stopper member having a pair of lateral opposing surfaces that face the front wheel from both the left and right sides, and that the front wheel support portion is composed of a front opposing surface and the pair of lateral opposing surfaces. In this way, the forward opposing surface of the stopper member prevents the front wheel of the test specimen from flying out, and the pair of lateral opposing surfaces grip the front wheel to prevent turning.

[0019] One embodiment of the fixing device in which the effects of the present invention are particularly pronounced is one in which the chassis roller is a chassis roller provided in a chassis dynamometer for testing four-wheeled automobiles.

[0020] Furthermore, the present invention relates to a test system for testing a test specimen which is a two-wheeled or three-wheeled vehicle, and is characterized by comprising: a chassis roller on which the drive wheels of the test specimen are placed; a fixing device of the present invention for fixing the test specimen on the chassis roller; and an evaluation device for evaluating the performance of the test specimen.

[0021] Furthermore, the fixing method of the present invention is a method for fixing a test specimen, which is a two-wheeled or three-wheeled vehicle, on a chassis roller, characterized in that the test specimen is fixed to the chassis roller using the fixing device of the present invention.

[0022] With such a test system and fixing method of the present invention, the same operational effects as those of the fixing device of the present invention described above can be achieved.

Effects of the Invention

[0023] According to the present invention, a fixing device capable of fixing a test specimen on a chassis roller can be provided.

Brief Description of the Drawings

[0024] [Figure 1] Perspective view schematically showing the configuration of the fixing device in an embodiment of the present invention. [Figure 2] Left side view showing the fixed state of a two-wheeled vehicle by the fixing device of the same embodiment. [Figure 3] Right side view showing the fixed state of a two-wheeled vehicle by the fixing device of the same embodiment. [Figure 4] Front view showing the fixed state of a two-wheeled vehicle by the fixing device of the same embodiment. [Figure 5] Rear view showing the fixed state of a two-wheeled vehicle by the fixing device of the same embodiment. [Figure 6A] Top view showing the fixed state of a two-wheeled vehicle by the fixing device of the same embodiment. [Figure 6B] Top view showing the configuration near the front wheel support portion of the fixing device of the same embodiment. [Figure 7] Bottom view showing the configuration near the front wheel support portion of the fixing device of the same embodiment. [Figure 8] Perspective view schematically showing the configuration of the fixing device of another embodiment. [Figure 9] Left side view showing the fixed state of a two-wheeled vehicle by the fixing device of another embodiment. <​​​​​​​​​The fixing device 100 of this embodiment is used in a vehicle testing system that tests the performance of a test vehicle V (also called a test specimen), such as an electric scooter or other two-wheeled vehicle, by running it on a chassis dynamometer. This vehicle testing system may include a chassis roller R on which the drive wheels of the test vehicle V are placed, and an evaluation device for evaluating the performance of the test vehicle V (for example, a torque measuring device, an energy consumption measuring device, and / or an exhaust gas measuring device, etc., but not limited to these). The fixing device 100 fixes the test vehicle V on one of the chassis rollers R provided in a chassis dynamometer for four-wheeled vehicles, and is intended to fix the test vehicle V with its drive wheels (in this case, the rear wheels) placed on the chassis roller R.

[0027] Specifically, as shown in Figures 1 to 7, the fixing device 100 comprises a base portion 1 installed on the floor G of the test chamber, straddling the chassis roller R; a front wheel support mechanism 3 provided on the base portion 1 to restrict the movement of the front wheels (driven wheels) of the test vehicle V; and an anti-lift mechanism 4 provided on the base portion 1 to prevent the body of the test vehicle V from lifting off the ground.

[0028] The base unit 1 includes a frame 11 that is installed so as to surround the chassis roller R. The test vehicle V is set inside the frame 11. The base unit 1 may further include at least one of a fixing mechanism 2 that fixes the base unit 1 to the floor surface G and legs 12 attached to the frame 11.

[0029] The frame 11 is rectangular in shape and has a front frame 11a and a rear frame 11b that are parallel to each other, and a pair of parallel side frames 11c and 11d that connect these frames. The frame 11 is installed so that the front frame 11a and the rear frame 11b are parallel to each other in the left-right direction of the chassis dynamometer, and the front frame 11a is located in front of the chassis roller R.

[0030] The legs 12 are height-adjustable and are attached to the bottom surface of the frame 11. Multiple legs 12 are attached along the periphery of the frame 11. The multiple legs 12 are adjusted so that the enclosed surface surrounded by the frame 11 is approximately horizontal.

[0031] The fixing mechanism 2 secures the base portion 1 (specifically the frame 11) to the floor surface G by bolting it. This fixing mechanism 2 includes a bracket component that connects the frame 11 and the floor surface G, a plurality of fixing holes provided in the frame 11 and the floor surface G for attaching the bracket component, and fastening components such as bolts for fastening the bracket component at the positions where the fixing holes are provided. The bracket component is, for example, an L-shaped bracket, but is not limited to this. In this embodiment, the base portion 1 is fixed to the floor surface G by a plurality of bracket components.

[0032] Multiple fixing holes are provided at intervals and at the same height along the circumferential direction on the side surface of the frame 11, allowing bracket components to be attached to any position on the frame 11. In this embodiment, multiple fixing holes are provided along the circumferential direction on both the outer and inner circumferential surfaces of the frame 11.

[0033] The front wheel support mechanism 3 is attached to the front frame 11a of the frame 11 and has a front wheel support portion 3a that contacts and supports the front wheels of the test vehicle V set inside the frame 11. This front wheel support portion 3a is configured to be slidable at least in the longitudinal direction so that its position in the longitudinal direction can be adjusted according to the size of the test vehicle V. In this embodiment, the front wheel support portion 3a is also configured to be slidable in the vertical direction.

[0034] Referring to Figures 6A and 6B, the front wheel support mechanism 3 includes a stopper member 31 that contacts the front wheel, and a holding member 32 that connects the base portion 1 and the stopper member 31, and holds the stopper member 31 in a predetermined position.

[0035] The stopper member 31 has at least a front facing surface 31a that faces the front of the front wheel. This front facing surface 31a is formed to be a flat surface parallel to the left-right and up-down directions of the fixing device 100, but is not limited to this.

[0036] Furthermore, the stopper member 31 of this embodiment has a pair of lateral opposing surfaces 31b that face the front wheel from both the left and right sides. These lateral opposing surfaces 31b are formed as flat surfaces parallel to the front-rear and up-down directions of the fixing device 100, but are not limited to this.

[0037] The front wheel support portion 3a is composed of at least a forward opposing surface 31a formed on the stopper member 31, and in this embodiment, it is composed of a forward opposing surface 31a formed on the stopper member 31 and a pair of lateral opposing surfaces 31b.

[0038] The stopper member 31 of this embodiment is constructed by combining a front plate 311 that forms a front opposing surface 31a and a pair of side plates 312 that form a lateral opposing surface 31b. The stopper member 31 is interposed between the front plate 311 and each of the pair of side plates 312 and is equipped with a left-right sliding mechanism (not shown) that connects the side plates 312 to the front plate 311 so that they can slide in the left-right direction. By connecting the front plate 311 and the pair of side plates 312 via such a sliding mechanism, the distance between the pair of lateral opposing surfaces 31b can be adjusted by sliding the pair of side plates 312 left and right.

[0039] The retaining member 32 holds the stopper member 31 above the base portion 1 and behind the front frame 11a. This retaining member 32 is roughly L-shaped and is attached to the front frame 11a.

[0040] Between the retaining member 32 and the front surface of the stopper member 31, there is an up-and-down sliding mechanism (not shown) that connects the stopper member 31 to the retaining member 32 so that it can slide vertically. By connecting the retaining member 32 and the stopper member 31 via such an up-and-down sliding mechanism, the stopper member 31 can be slid up and down to adjust the vertical position of the front wheel support portion 3a.

[0041] Furthermore, a front-to-back sliding mechanism (not shown) is interposed between the holding member 32 and the upper surface of the front frame 11 of the base 1, which connects the holding member 32 to the base 1 so that it can slide in the front-to-back direction. By connecting the holding member 32 and the base 1 via such a front-to-back sliding mechanism, the stopper member 31 held by the holding member 32 can be slid back and forth to adjust the front-to-back position of the front wheel support 3a.

[0042] The anti-float mechanism 4 is attached to the side frames 11c and d of the frame 11 and has a body-holding portion 4a that holds down the body of the test vehicle V set inside the frame 11 from above. This body-holding portion 4a is configured to be slidable at least in the vertical direction so that its vertical position can be adjusted to match the size of the test vehicle V. In this embodiment, the body-holding portion 4a is also configured to be slidable in the front-rear direction. In this embodiment, the front-rear position and the vertical position of the body-holding portion 4a are adjusted so that it holds down the seat on the body of the test vehicle V from above.

[0043] Specifically, this anti-floating mechanism 4 comprises a pair of left and right support members 41 extending upward from the base 1, and a clamp member 42 attached across the pair of support members 41.

[0044] The support member 41 is for supporting the clamp member 42. This support member 41 is roughly L-shaped and is attached to the side frames 11c and 11d. The pair of support members 41 are attached to the frame 11 facing each other in a symmetrical manner. The distance between the opposing faces of the pair of support members 41 is longer than the width of the test vehicle V.

[0045] The clamp member 42 is columnar (in this case, rectangular prism) in shape and extends in the left-right direction. The lower surface of this clamp member 42 constitutes the vehicle body holding portion 4a.

[0046] Between the pair of support members 41 and the front or rear surface of the clamp member 42, there is an up-and-down sliding mechanism (not shown) that connects the clamp member 42 to the pair of support members 41 so that it can slide vertically. By connecting the clamp member 42 to the pair of support members 41 via such an up-and-down sliding mechanism, the clamp member 42 can be slid up and down to adjust the vertical position of the vehicle body retaining portion 4a.

[0047] Furthermore, a front-to-back sliding mechanism (not shown) is interposed between the pair of support members 41 and the upper surfaces of the side frames 11c and d of the frame 11, which allows the pair of support members 41 to slide relative to the base 1 in the front-to-back direction. By connecting the support members 41 and the base 1 via such a front-to-back sliding mechanism, the clamp member 42 attached to the support member 41 can be slid back and forth to adjust the front-to-back position of the vehicle body retaining portion 4a.

[0048] The fixing device 100 may further include a lateral sway prevention mechanism 5 provided on the base 1 to prevent lateral swaying of the test vehicle V.

[0049] This lateral sway prevention mechanism 5 is attached to the side frames 11c and d of the frame 11 and has a body support portion 5a that contacts and supports the side of the body of the test vehicle V set inside the frame 11. This body support portion 5a is configured to be slidable at least in the left-right direction so that its position in the left-right direction can be adjusted according to the size of the test vehicle V. In addition, the body support portion 5a may not contact the body when the posture of the test vehicle V is held straight, and may only contact and support the side of the body when the posture of the test vehicle V is tilted.

[0050] In this embodiment, the vehicle body support portion 5a is further configured to be slidable in the vertical direction. The front-rear position and vertical position of the vehicle body support portion 5a in this embodiment are adjusted so that the center of gravity of the test vehicle V can be supported from directly to the side.

[0051] Specifically, this lateral sway prevention mechanism 5 comprises a pair of left and right support members 51 extending upward from the base 1, and a pair of left and right arm members 52 attached to the pair of support members 51 so as to face each other.

[0052] The support member 51 is for supporting the arm member 52. This support member 51 is roughly L-shaped and is connected to the side frames 11c and d of the frame 11. The pair of support members 51 are attached to the frame 11 facing each other in a symmetrical manner. The distance between the opposing faces of the pair of support members 51 is longer than the width of the test vehicle V. In this embodiment, the lateral sway prevention mechanism 5 and the lift prevention mechanism 4 share a pair of support members 41 and 51. That is, the lateral sway prevention mechanism 5 and the lift prevention mechanism 4 are constructed using common support members 41 and 51.

[0053] The arm member 52 is columnar (in this case, rectangular columnar) and extends in the left-right direction. The inward-facing tip of this arm member 52 constitutes the vehicle body support portion 5a.

[0054] A left-right sliding mechanism (not shown) is interposed between each support member 51 and the front or rear surface of each arm member 52, which connects the arm member 52 to the support member 51 so that it can slide in the left-right direction. By connecting the arm member 52 and the support member 51 via such a left-right sliding mechanism, the left-right position of the vehicle body support portion 5a can be adjusted by sliding the arm member 52 left or right.

[0055] Furthermore, an up-and-down sliding mechanism (not shown) is interposed between each support member 51 and the front or rear surface of each arm member 52, which connects the arm member 52 to the support member 51 so that it can slide vertically. By connecting the arm member 52 and the support member 51 via such an up-and-down sliding mechanism, the arm member 52 can be slid up and down to adjust the vertical position of the vehicle body support portion 5a.

[0056] With the fixing device 100 of this embodiment configured in this way, the front wheel support mechanism 3 and the anti-floating mechanism 4 are provided on the base portion 1 installed on the floor surface G, so there is no need to assemble a frame that surrounds the test vehicle V from the front, rear and above, and the device configuration can be made compact. Furthermore, the front wheel support mechanism 3 restricts the movement of the front wheels of the test vehicle V, preventing them from turning or flying off. Additionally, the anti-lift mechanism 4 holds down the body of the test vehicle V from above, preventing it from lifting and maintaining its posture, thereby fixing the test vehicle V on the chassis roller R. Furthermore, since the front wheel support section 3a is slidable in the front-rear direction and the vehicle body retaining section 4a is slidable in the up-down direction, various sizes of test vehicles V can be fixed on the chassis roller R by adjusting the positions of the front wheel support section 3a and the vehicle body retaining section 4a.

[0057] Furthermore, the fixing device 100 is further equipped with a lateral sway prevention mechanism 5 to prevent lateral swaying of the test vehicle V's body, and by supporting the body from both sides with the body support section 5a, the posture of the vehicle can be maintained more stably.

[0058] However, the present invention is not limited to the embodiments described above. For example, the fixing device 100 in the above embodiment used an electric scooter as an example of the test vehicle V, but is not limited to this. The test vehicle targeted by the fixing device 100 in the embodiment of the present invention is one that cannot maintain an upright posture without support when mounted on a chassis roller and subjected to a driving test, and has front wheels and rear wheels, with at least one of them being a single wheel. The test vehicle may be, for example, a motorized two-wheeled vehicle, an electric motorcycle, a bicycle, an electric kick scooter, or a tricycle.

[0059] Furthermore, while the fixing device 100 in the above embodiment was used to fix the test vehicle V on the chassis roller R of a chassis dynamometer for a four-wheeled vehicle, it is not limited to this. The fixing device 100 in other embodiments may be used to fix the test vehicle V on a chassis roller R for a two-wheeled vehicle or a three-wheeled vehicle.

[0060] Furthermore, while the fixing device 100 in the above embodiment has a front opposing surface 31a and a pair of side surfaces provided on a single stopper member 31, it is not limited to this. In other embodiments, the front opposing surface 31a and the pair of side surfaces may be provided on separate stopper members 31 that are individually slidable in the front-rear direction.

[0061] In the above embodiment of the fixing device 100, the front wheel support portion 3a was configured to slide in both the front-rear direction and the up-down direction, but it is not limited to this. In the fixing device 100 of other embodiments, the front wheel support portion 3a may be slidable in the front-rear direction, and its position in the up-down direction may be fixed.

[0062] Furthermore, in the fixing device 100 of the above embodiment, the vehicle body retaining portion 4a was configured to be slidable in the vertical and longitudinal directions, respectively, but this is not limited to this. In the fixing device 100 of other embodiments, the vehicle body retaining portion 4a may be slidable in the vertical direction, and its position in the longitudinal direction may be fixed.

[0063] Furthermore, while the fixing device 100 in the above embodiment was configured with the anti-float mechanism 4 and the anti-lateral sway mechanism 5 using common support members 41 and 51, it is not limited to this. In other embodiments of the fixing device 100, the anti-float mechanism 4 and the anti-lateral sway mechanism 5 may be configured with different support members. Also, the fixing device 100 in other embodiments may not have the anti-lateral sway mechanism 5.

[0064] Furthermore, in the above embodiment, the vehicle body support portion 5a was adjusted to its left-right position so as to contact the side of the vehicle body only when the posture of the test vehicle V was tilted, but it is not limited to this. In other embodiments, the vehicle body support portion 5a may be adjusted to its left-right position so as to always contact the side of the vehicle body, regardless of the posture of the test vehicle V.

[0065] In other embodiments, the fixing device 100 may also include a second lift prevention mechanism 6 provided on the base portion 1 to prevent the front wheels of the test vehicle V from lifting off the ground. As shown in Figures 8 and 9, the second lift prevention mechanism 6 is attached to the side frames 11c and d of the frame 11 and has a front wheel retaining portion 6a that presses down on the front wheels of the test vehicle V set inside the frame 11 from above. This front wheel retaining portion 6a is configured to be slidable at least in the vertical direction so that its vertical position can be adjusted to match the size of the front wheels of the test vehicle V. In this embodiment, the front wheel retaining portion 6a is also configured to be slidable in the front-rear direction. In this embodiment, the front-rear position and the vertical position of the front wheel retaining portion 6a are adjusted so as to press down on the front wheels of the test vehicle V from above.

[0066] Specifically, this second anti-floating mechanism 6 comprises a pair of left and right support members 61 extending upward from the base 1, and a clamp member 62 attached across the pair of support members 61.

[0067] The support member 61 is for supporting the clamp member 62. This support member 61 is roughly L-shaped and is attached to the side frames 11c and 11d. The pair of support members 61 are attached to the frame 11 facing each other in a symmetrical manner. The distance between the opposing faces of the pair of support members 61 is longer than the width of the test vehicle V.

[0068] The clamp member 62 is columnar (in this case, rectangular columnar) and extends in the left-right direction. The lower surface of this clamp member 62 constitutes the front wheel retaining portion 6a.

[0069] Between the pair of support members 61 and the front or rear surface of the clamp member 62, there is an up-and-down sliding mechanism (not shown) that connects the clamp member 62 to the pair of support members 61 so that it can slide vertically. By connecting the clamp member 62 to the pair of support members 61 via such an up-and-down sliding mechanism, the clamp member 62 can be slid up and down to adjust the vertical position of the front wheel retaining portion 6a.

[0070] Furthermore, a front-to-back sliding mechanism (not shown) is interposed between the pair of support members 61 and the upper surfaces of the side frames 11c and d of the frame 11, which allows the pair of support members 61 to slide relative to the base 1 in the front-to-back direction. By connecting the support members 61 and the base 1 via such a front-to-back sliding mechanism, the clamp member 62 attached to the support member 61 can be slid back and forth to adjust the front-to-back position of the front wheel retaining portion 6a.

[0071] In other embodiments, the fixing device 100 may also include a front lateral sway prevention mechanism 7 provided on the base portion 1 to prevent lateral sway of the vehicle body on the front wheel side of the test vehicle V.

[0072] As shown in Figures 8 and 9, the front lateral sway prevention mechanism 7 has a front wheel support portion 7a that contacts and supports the front fork Vf of the test vehicle V set inside the frame 11. This front wheel support portion 7a is configured to be slidable at least in the left-right direction. Note that the front wheel support portion 7a may not contact the front fork Vf when the posture of the test vehicle V is held straight, and may only contact and support the front fork Vf when the posture of the test vehicle V is tilted.

[0073] In this embodiment, the front wheel support portion 7a is further configured to be slidable in the vertical direction.

[0074] Specifically, this front side lateral sway prevention mechanism 7 comprises a pair of left and right support members 71 extending upward from the base 1, and a pair of left and right arm members 72 attached to the pair of support members 71 so as to face each other.

[0075] The support member 71 is for supporting the arm member 72. This support member 71 is roughly L-shaped and is connected to the side frames 11c and d of the frame 11. The pair of support members 71 are attached to the frame 11 facing each other in a symmetrical manner. The distance between the opposing faces of the pair of support members 71 is longer than the width of the test vehicle V. In this embodiment, the front lateral sway prevention mechanism 7 and the second lift prevention mechanism 6 share the pair of support members 71 and 61. That is, the second lift prevention mechanism 6 and the front lateral sway prevention mechanism 7 are constructed using the common support members 61 and 71.

[0076] The arm member 72 is columnar (in this case, rectangular columnar) and extends in the left-right direction. The inward-facing tip of this arm member 72 constitutes the front wheel support portion 7a.

[0077] A left-right sliding mechanism (not shown) is interposed between each support member 71 and the front or rear surface of each arm member 72, which connects the arm member 72 to the support member 71 so that it can slide in the left-right direction. By connecting the arm member 72 and the support member 71 via such a left-right sliding mechanism, the left-right position of the front wheel support portion 7a can be adjusted by sliding the arm member 72 left or right.

[0078] Furthermore, an up-and-down sliding mechanism (not shown) is interposed between each support member 71 and the front or rear surface of each arm member 72, which connects the arm member 72 to the support member 71 so that it can slide vertically. By connecting the arm member 72 and the support member 71 via such an up-and-down sliding mechanism, the arm member 72 can be slid up and down to adjust the vertical position of the front wheel support portion 7a.

[0079] In other embodiments of the fixing device 100, as shown in Figures 8 and 9, the aforementioned lateral sway prevention mechanism 5 provided on the rear wheel side may have a rear wheel support portion 5b that contacts and supports the rear fork Vr of the test vehicle V. This rear wheel support portion 5b is configured to be slidable at least in the left-right direction. The rear wheel support portion 5b may not contact the rear fork Vr when the posture of the test vehicle V is held straight, and may only contact and support the rear fork Vr when the posture of the test vehicle V is tilted. The rear wheel support portion 5b may also be configured to be slidable in the up-down direction.

[0080] Specifically, this rear wheel support section 5b includes a pair of left and right arm members 53 attached to a pair of support members 51 provided by the lateral sway prevention mechanism 5.

[0081] The arm member 53 is columnar (in this case, rectangular columnar) in shape and extends in the left-right direction. The rear wheel support portion 5b is formed by the inward-facing tip of this arm member 53.

[0082] A left-right sliding mechanism (not shown) is interposed between each support member 51 and the front or rear surface of each arm member 53, which connects the arm member 53 to the support member 51 so that it can slide in the left-right direction. By connecting the arm member 53 and the support member 51 via such a left-right sliding mechanism, the left-right position of the rear wheel support portion 5b can be adjusted by sliding the arm member 53 left or right.

[0083] Furthermore, an up-and-down sliding mechanism (not shown) is interposed between each support member 51 and the front or rear surface of each arm member 53, which connects the arm member 53 to the support member 51 so that it can slide vertically. By connecting the arm member 53 and the support member 51 via such an up-and-down sliding mechanism, the arm member 53 can be slid up and down to adjust the vertical position of the rear wheel support portion 5b.

[0084] In another embodiment, the fixed base 100 is equipped with a rollback prevention mechanism 8 to prevent the set test vehicle V from rolling backward. The rollback prevention mechanism 8 is configured to pull the test vehicle V from the front. Specifically, as shown in Figure 9, this rollback prevention mechanism 8 is composed of a lashing belt 81 stretched through the front wheels of the test vehicle V. Both ends of the lashing belt 81 are fixed to the floor surface in front of the front frame 11a of the base 1. The lashing belt 81 is also equipped with a tightening mechanism such as a ratchet (not shown), and is configured to be tensioned by this tightening mechanism.

[0085] Furthermore, various modifications and combinations of embodiments are permitted, as long as they do not contradict the spirit of the present invention. [Explanation of Symbols]

[0086] 100... Fixtures 1 ···Base 2...Fixing mechanism 3...Front wheel support mechanism 3a...Front wheel support part 4. Anti-float mechanism 4a ... Vehicle body retaining section 5... Lateral vibration prevention mechanism 5a ···Vehicle body support section V...Test Vehicle G...Floor surface R... Chassis Roller

Claims

1. A fixing device for securing a test specimen, which is a two-wheeled or three-wheeled vehicle, on a chassis roller, A base portion that is installed on the floor surface, straddling the chassis roller, A front wheel support mechanism is provided on the base portion and restricts the movement of the front wheel of the test specimen, and has a front wheel support portion that contacts and supports the front wheel, A fixing device comprising: a lift prevention mechanism provided on the base portion to prevent the vehicle body of the test specimen from lifting, and having a vehicle body holding portion that is slidable in the vertical direction and holds down the vehicle body from above.

2. The aforementioned float prevention mechanism, A pair of left and right support members extending upward from the base portion, A clamp member is attached by being stretched across the pair of support members, The system includes an up-and-down sliding mechanism interposed between the pair of support members and the clamp member, which connects the clamp member to the pair of support members so as to be slidable in the up-and-down direction, The fixing device according to claim 1, wherein the vehicle body holding portion is formed by the lower surface of the clamp member.

3. The fixing device according to claim 2, wherein the anti-floating mechanism is interposed between the pair of support members and the base portion, and comprises a front-to-back sliding mechanism that connects the pair of support members so as to be slidable in the front-to-back direction relative to the base portion.

4. The fixing device according to any one of claims 1 to 3, further comprising a lateral sway prevention mechanism provided on the base portion, which prevents lateral sway of the vehicle body of the test specimen, and which has vehicle body support portions that are slidable in the left-right direction and contact and support both sides of the vehicle body.

5. The aforementioned lateral vibration prevention mechanism, A pair of left and right support members extending upward from the base portion, A pair of left and right arm members are attached to the pair of support members so as to face each other, The system includes a left-right sliding mechanism interposed between the pair of support members and the pair of arm members, which slides the arm members in the left-right direction relative to the pair of support members, The fixing device according to claim 4, wherein the vehicle body support portion is formed by the tips of the pair of arm members.

6. The fixing device according to claim 5, which references claim 2, wherein the floating prevention mechanism and the lateral sway prevention mechanism are provided with a common pair of support members.

7. The fixing device according to any one of claims 1 to 6, wherein the base portion comprises a frame surrounding the chassis roller and a fixing mechanism for fixing the frame to the floor surface.

8. The fixing mechanism comprises a bracket component that connects the frame and the floor surface, and a fixing hole for fixing the bracket component to the frame. The fixing device according to claim 7, wherein the frame is provided with a plurality of fixing holes along its circumferential direction.

9. The fixing device according to claim 7 or 8, wherein the base portion comprises a plurality of height-adjustable legs attached to the frame along the circumferential direction.

10. The aforementioned front wheel support mechanism A stopper member having a front facing surface that faces the front of the front wheel, A holding member connects the base portion and the stopper member, and holds the stopper member in a predetermined position, It is provided with a front-to-back sliding mechanism interposed between the holding member and the base portion, which connects the holding member to the base portion so that it can slide in the front-to-back direction, The fixing device according to any one of claims 1 to 9, wherein the front wheel support portion is configured to have a front-facing surface of the stopper member.

11. The stopper member has a pair of lateral opposing surfaces that face the front wheel from both the left and right sides, The fixing device according to claim 10, wherein the front wheel support portion is further provided with the pair of lateral opposing surfaces.

12. The fixing device according to any one of claims 1 to 11, wherein the chassis roller is a chassis roller provided in a chassis dynamometer for testing four-wheeled vehicles.

13. A test system for testing a test specimen that is a two-wheeled or three-wheeled vehicle, A chassis roller on which the drive wheels of the aforementioned test specimen are mounted, A fixing device according to any one of claims 1 to 12 for fixing the test specimen onto the chassis roller, A test system comprising an evaluation device for evaluating the performance of the aforementioned test specimen.

14. A method for fixing a test specimen, which is a two-wheeled or three-wheeled vehicle, on a chassis roller, A method for fixing the test specimen to the chassis roller using the fixing device described in any one of claims 1 to 12.

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