JP4206590B2 - Chassis dynamometer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a winding system for a sliding pit cover that moves together with a moving roller of a chassis dynamometer for testing a vehicle.
[0002]
[Prior art]
A sliding pit cover of a conventional chassis dynamometer will be described with reference to FIGS.
[0003]
Reference numeral 1 denotes a pair of moving rollers connected to each other, 2 denotes a pair of fixed rollers connected to each other, and 3 and 4 denote dynamometers connected to the moving roller 1 and the fixed roller 2, respectively. A moving cover 5 covers the upper part of the moving roller 1 and has an opening 5 a for mounting the driving wheel of the test vehicle on the moving roller 1. A number of caterpillars 6 connected via hinges (not shown) are connected before and after the movable cover 5. The moving cover 5 and the caterpillar 6 constitute a sliding cover of a sliding pit cover. The vicinity of the fixed roller 2 is covered with fixed pit covers 10a and 10b.
[0004]
On the other hand, since the distance between the front wheel and the rear wheel of the vehicle, that is, the wheel base W, differs depending on the vehicle type, the moving roller 1 needs to be movable in the front-rear direction of the vehicle, and the moving cover 5 and the caterpillar 6 can be moved accordingly. It is necessary to. 7 and 21 are fixed beams for supporting the pit covers 10a and 10b, 8a and 8b are receiving portions provided inside the fixed beams 7 and 21, and 9 is a sliding plate fixed on the receiving portions 8a and 8b. The caterpillar 6 and the moving cover 5 move on the sliding plate 9. When the moving roller 1 is slightly separated in the front-rear direction, the support mechanism is broken, so that the shutter 6 is bent at the hinge portion and moved downward.
[0005]
The pit cover 10a is supported via a fixed beam 7 provided so as to bridge the fixed column 11. In order to move the moving roller 1, after loosening the lock bolt for fixing the slide bed 13 on the rail 12, the guard motor 14 is rotated in one direction. Since a ball screw (not shown) that is screwed to the slide bed 13 is interlocked with the guard motor 14, the slide bed 13 moves along the rail 12.
[0006]
In addition to the moving roller 1 and the dynamometer 3, the slide bed 13 is provided with a cooling blower 15 for cooling the dynamometer 3 and two pairs of moving columns 16 and 17. One pair of moving struts 16 is short and wide between each other, but the other moving strut 17 is long and narrowly spaced from each other. An auxiliary member 18 is fixed to the upper ends of the pair of movable struts 16, and a pair of fixed bases 18a having a U-shaped cross-sectional shape are fixed on the auxiliary member 18 with the opening portion facing upward.
[0007]
A fixed base 17 a is fixed to the upper ends of the pair of moving columns 17.
[0008]
On the other hand, beams 5 b are fixed to the lower surfaces of the pair of moving covers 5, and the lower ends of the beams 5 b are connected to each other via connecting rods 19 and 20. The connecting rods 20 and 19 are fitted in the U-shapes of the fixing bases 17a and 18a.
[0009]
When the slide bed 13 is moved to move the moving roller 1, the sliding pit covers (5, 6) are moved through the connecting rods 20, 19 and the beam 5 due to the movement of the moving columns 16, 17 integrated therewith.
[0010]
The end of the shutter 6 is attached to the fixed part 27 via a chain 26.
[0011]
[Problems to be solved by the invention]
By the way, when it is desired to increase the moving amount of the moving roller, the stroke of the sliding pit cover cannot be extended due to the lack of storage space for the caterpillar 6. When it is intended to extend, a method of providing a guide 28 for guiding a pit to a portion where the caterpillar is expanded by expanding the pit in the front-rear direction as shown in FIG. 11A, or a caterpillar digging up the pit as shown in FIG. A method of expanding the storage portion downward is taken. However, these methods cannot be used where pits cannot be expanded.
[0012]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a sliding pit cover that can increase the amount of movement of the moving roller without expanding the pit space. .
[0013]
[Means for Solving the Problems]
The present invention relates to a chassis dynamometer having a fixed roller and a moving roller on which a vehicle tire rides, a moving cover that moves together with the moving roller, a sliding pit cover having a caterpillar connected to the moving cover, and a caterpillar storage unit. A caterpillar take-up drum is provided in the caterpillar storage unit to increase the storage amount of the caterpillar.
[0015]
A rotation transmission device is provided between the roller driving motor for moving the moving roller and the caterpillar winding drum shaft, and the caterpillar winding drum is driven together with the moving roller.
[0016]
Alternatively, a drum driving motor is provided on the shaft of the caterpillar winding drum, the rotation of the roller driving motor that moves the moving roller is detected, and the drum driving motor is controlled by the control device.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1, a caterpillar take-up drum 32 is provided in the caterpillar storage part 31 in the pit 30, so that the storage amount of the caterpillar 6 can be increased without expanding the caterpillar storage part 31. I was able to take it big.
[0019]
Example 1 (spring winding method)
1 and 2, the shaft 33 of the take-up drum 32 is supported on the caterpillar storage 31 by a bearing 34. One end 33 a of the shaft 33 protrudes outside the bearing 34 a, a spring winding device 35 including a winding spring 36 and a case 37 is attached to the outside of the bearing 34 a, and the inner end 36 a of the winding spring 36 is connected to one end of the shaft 33. The outer end 36 b is fixed to the case 37. The other end of the caterpillar 6 connected to the movable cover 5 (FIG. 7) is connected to a winding drum 32 in a state in which the winding spring 36 is covered in a windable direction. It is in a state where it is in a state of being wound around the drum 32.
[0020]
Next, the operation of the first embodiment will be described. When the moving roller 1 is moved in the arrow A direction, the moving cover 5 is interlocked, and the connecting end of the caterpillar 6 connected to the moving cover 5 is moved in the arrow A direction. When the tension of the caterpillar 6 exceeds a certain value due to this movement, the winding drum 32 is rotated by the force of the winding spring 36 and the caterpillar 6 wound around the winding drum 32 is fed out in the direction of arrow A. It is.
[0021]
When the moving roller 1 is moved in the arrow B direction, the connecting end of the caterpillar 6 connected to the moving cover 5 moves in the arrow B direction. Due to this movement, the tension of the caterpillar 6 disappears, so that the winding drum 32 is rotated in the winding direction by the cover biasing force of the winding spring 36 to wind up the caterpillar 6.
[0022]
Example 2 (roller moving motor interlocking winding method)
1 and 3, the shaft 33 of the take-up drum 32 is supported on the caterpillar storage 31 by a bearing 34. One end 33a of the shaft 33 protrudes outside the bearing 34a, and a sprocket 46 is attached. The end of the caterpillar 6 is connected to the winding drum 32 so that winding and unwinding are possible.
[0023]
On the other hand, the bevel gear 41 is attached to the shaft 14 a of the roller moving motor 14 that rotates the feed screw 48 and drives the slide bed 13 to move the moving roller 1. A sprocket 44 is attached to the other end of a shaft 43 having a bevel gear 42 that meshes with the bevel gear 41, and a chain 45 is hung between the sprockets 44 and 46. Reference numeral 47 denotes a bearing that supports the shaft 43.
[0024]
Next, the operation of the second embodiment will be described. When the roller moving motor 14 is driven and the feed screw 48 is rotated counterclockwise in order to move the moving roller 1 in the direction of arrow A, the slide bed 13 moves in the direction of arrow A, and the moving roller 1 together with the slide bed 13 moves to the direction of arrow A. Move in the direction. As the moving roller 1 moves, the moving cover 5 moves in the direction of arrow A, and the connecting end of the caterpillar 6 connected to the moving cover 5 moves in the direction of arrow A. The winding drum 32 is driven by the roller moving motor 14 through the rotation transmission mechanism (41 to 46), and rotates in the feeding direction in proportion to the moving amount of the moving roller 1. Thus, the gear ratio of the sprockets 44, 46, etc. is selected so that the caterpillar 6 can be fed out from the take-up drum 32 in a state where the caterpillar 6 has a slight slack d. Moves in the A direction without difficulty.
[0025]
When the roller moving motor 14 is driven in the opposite direction to move the moving roller 1 in the arrow B direction, the winding drum 32 rotates in the winding direction in proportion to the amount of movement. In this case, the caterpillar 6 is easily wound on the winding drum 32 with a slight slack d. The slack d of the caterpillar 6 decreases as the winding amount increases.
[0026]
Example 3 (Proportional control system with roller moving motor)
1 and 4, the shaft 33 of the take-up drum 32 is supported on the caterpillar storage portion 31 by a bearing 34. One end 33a of the shaft 33 is projected to the outside of the bearing 34a, and the winding drum driving motor 51 is attached. Then, the rotation angle or the number of rotations of the roller moving motor 14 is detected, and the controller 52 determines the positive or negative rotation angle (or the number of rotations) of the winding motor 51 as the positive or negative rotation angle ( (Or the number of revolutions), so that the winding to the winding drum 32 and the feeding from the winding drum 32 can be performed with the caterpillar 6 slightly slackened.
[0027]
Next, the operation of the third embodiment will be described. When the roller moving motor 14 is driven to move the moving roller 1 in the direction of arrow A, the moving roller 1 moves in the A direction together with the slide bed 13. As the moving roller 1 moves, the moving cover 5 moves in the direction of arrow A, and the connecting end of the caterpillar 6 connected to the moving cover 5 moves in the direction of arrow A. Since the winding drum 32 rotates in proportion to the rotation angle of the roller moving motor 14, that is, in proportion to the moving amount of the moving roller 1, the winding drum 32 can be fed out from the winding drum 32 with a slight slack d. As described above, if the controller 52 is set so as to proportionally control the take-up drum driving motor 51 with respect to the rotation angle (or the number of rotations) of the roller moving motor 14, the movement of the moving roller 1 can be adjusted. The caterpillar 6 moves without difficulty.
[0028]
When the roller moving motor 14 is driven in the opposite direction to move the moving roller 1 in the direction of arrow B, the winding drum 32 rotates in the winding direction in proportion to the amount of movement, and the caterpillar 6 It is wound up on the winding drum 32 with a slight slack d. The proportional control is performed so that the slack does not become negative at the maximum winding amount.
[0029]
Example 4 (winding system with weight)
1 and 5, the fourth embodiment uses a weight take-up device 61 using a weight instead of the spring take-up device 35 using the take-up spring 36 of the first embodiment. The weight take-up device 61 includes a grooved drum 62 having a groove 62a on the circumferential surface fixed to the shaft 33a of the take-up drum 32, and one end fixed to the drum 62 and wound around the groove 62a of the drum 62 several times. And a weight 64 suspended from the other end of the rope 63. The winding direction of the rope 63 is the winding drum winding direction. Other configurations are the same as those in FIG.
[0030]
Next, the operation of the fourth embodiment will be described. When the moving roller 1 is moved in the arrow A direction, the moving cover 5 is interlocked, and the connecting end of the caterpillar 6 connected to the moving cover 5 is moved in the arrow A direction. When the tension of the caterpillar 6 exceeds a certain value due to this movement, the winding drum 32 is rotated by the force in the winding direction by the weight 64 and the caterpillar 6 wound around the winding drum 32 is moved to the arrow A. It is paid out in the direction.
[0031]
When the moving roller 1 is moved in the arrow B direction, the connecting end of the caterpillar 6 connected to the moving cover 5 moves in the arrow B direction. Due to this movement, the tension of the caterpillar 6 disappears, so that the winding drum 32 is rotated in the winding direction by the rotational force by the weight 36 to wind up the caterpillar 6. In this case, since the winding amount and feeding amount of the caterpillar 6 are proportional to the moving amount of the weight, it is necessary to provide a hole through which the weight can enter at the bottom of the pit in order to increase the moving amount of the moving roller. In order to make this hole unnecessary, the moving amount of the weight 64 may be reduced by interposing a reduction gear device between the shaft 33a of the winding drum 32 and the grooved drum 61.
[0032]
【The invention's effect】
Since this invention is a caterpillar winding system as described above, the following effects can be obtained.
(1) Even if the pit is small, the moving amount of the moving roller can be extended.
(2) A chassis dynamometer with a large moving amount of the moving roller can be installed on the second floor, the third floor, etc. where the pit cannot be taken deeply.
(3) Since the space taken by the caterpillar is small even if the pit is small, it is possible to take space for maintenance and the like.
(4) Since the caterpillar is not hanging like the hanging method, it is safe even if a person passes by.
[Brief description of the drawings]
FIG. 1 is a side view of a pit cover according to an embodiment.
FIG. 2 is a configuration explanatory view of a pit cover winding device according to the first embodiment.
FIG. 3 is a diagram illustrating the configuration of a pit cover winding device according to a second embodiment.
FIG. 4 is a configuration explanatory view of a pit cover winding device according to a third embodiment.
FIG. 5 is a configuration explanatory view of a pit cover winding device according to a fourth embodiment.
FIG. 6 is a conceptual diagram of a chassis dynamometer.
7 is an AA arrow view of FIG. 6;
FIG. 8 is a side view of a pit cover.
FIG. 9 is a side view showing a storage state of the caterpillar.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Moving roller 2 ... Fixed roller 3, 4 ... Dynamometer 5 ... Moving cover 6 ... Caterpillar 13 ... Slide bed 32 ... Caterpillar winding drum 33 ... Winding drum shaft 34 ... Bearing 36 ... Winding springs 41, 42 ... Umbrella Gears 44, 46 ... Sprocket 45 ... Chain 51 ... Winding motor 52 ... Controller 62 ... Grooved drum 63 ... Rope 64 ... Weight

Claims (2)

In a chassis dynamometer having a fixed roller and a moving roller on which a vehicle tire rides, a moving cover that moves together with the moving roller, a sliding pit cover having a caterpillar connected to the moving cover, and a caterpillar storage unit,
A caterpillar take-up drum is provided in the caterpillar storage part, and the storage amount of the caterpillar can be increased .
A chassis dynamometer characterized in that a rotation transmission device is provided between a roller driving motor for moving a moving roller and a shaft of a caterpillar winding drum, and the winding drum is rotated by a slide bed driving motor . In a chassis dynamometer having a fixed roller and a moving roller on which a vehicle tire rides, a moving cover that moves together with the moving roller, a sliding pit cover having a caterpillar connected to the moving cover, and a caterpillar storage unit,
A chassis dynamometer characterized in that a drum driving motor is provided on the shaft of the caterpillar winding drum, the rotation of the roller driving motor for moving the moving roller is detected, and the drum driving motor is controlled by a control device .

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