JP3377774B2 - Vibration stroke setting mechanism in shock absorber inspection device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration stroke setting mechanism, and more particularly to a vibration stroke setting mechanism for giving a shock of a predetermined stroke to a shock absorber in an inspection device for evaluating shock absorbing performance of the shock absorber. It is a thing.

[0002]

2. Description of the Related Art A suspension is attached to a vehicle such as an automobile running on the road. The suspension of an automobile mainly includes a vertical guide mechanism for wheels, a spring, and a damper, and prevents vertical force generated between the road surface and the wheels from being directly transmitted to the vehicle body. In other words, the suspension has a shock absorption function,
It not only improves the riding comfort but also ensures the stability of the vehicle.

Explaining the stability of the vehicle concretely, the load supported by the wheel, that is, the ground contact load of the wheel is the weight of the vehicle itself when the vehicle is stopped, but when the vehicle starts traveling, the load fluctuation due to the unevenness of the road surface is added thereto. . Therefore, if no suspension is provided, for example, 100 km
When traveling at / h, the maximum load is about twice as much as when stopped,
The minimum load is said to be almost zero. When the ground contact load becomes zero, the wheels may not be pressed against the road surface and the vehicle may float in the air. Therefore, in general, a suspension is provided to suppress fluctuations in the load and ensure the running stability of the vehicle.

As described above, since the suspension has an extremely important function when the vehicle runs, it is necessary to evaluate whether or not the shock absorbing function can be surely obtained when manufactured. Therefore, for example, a shock absorber such as a damper, which is a main component of the suspension, is subjected to 100% inspection before assembly to determine whether it is acceptable or not.

An example of a conventional inspection apparatus is shown in FIGS. 10 and 11.
It will be explained based on. 10 is an explanatory diagram showing the configuration of the inspection device 100, and FIG. 11 is an explanatory diagram showing the configuration of the vibration stroke setting mechanism 101 in the inspection device 100. The inspection apparatus 100 causes the vibration input unit 99 of the shock absorber 98 to vibrate the vibration stroke setting mechanism 101 and the vibration input unit 99 of the shock absorber 98 when the vibration input unit 99 of the shock absorber 98 is vibrated. Displacement detecting means 102 for detecting, load detecting means 103 for detecting a load applied via the shock absorber 98, and a controller for evaluating shock absorbing performance of the shock absorber 98 based on outputs of the displacement detecting means 102 and the load detecting means 103. And 104. The result evaluated by the controller 104 is displayed by the display 105, the display lamp 107, etc.
It is printed by the printer 106 or the like.

Here, the vibration stroke setting mechanism 101
Is a servo motor 109 attached to the mount 108,
The speed reducer 110 connected to the rotary shaft 109a of the servo motor 109, the conversion means 111 for converting the rotational motion of the speed reducer 110 into the linear motion, and the reciprocating linear motion by the conversion means 111 are applied to the vibration input part 99 of the shock absorber 98. And a vibrating shaft 112 that gives vibration. Also, the conversion means 11
1 is a shaft 1 of the speed reducer 110, as shown in FIG.
Crank pin 11 provided at a predetermined position with respect to 10a
3, a connecting arm 114 whose one end is pivotally supported by the crank pin 113 and the other end is pivotally supported by the vibration shaft 112, and a guide portion 115 which restricts the movement of the vibration shaft 112. That is, when the servo motor 109 is driven, the crank pin 113 makes a circular motion along the track Z, and the connecting arm 114 is displaced. At this time, the vibrating shaft 112 connected to the connecting arm 114 is displaced together with the connecting arm 114, but the lateral movement of the vibrating shaft 112 is restricted by the guide portion 115, so that the vibrating shaft 112 has a predetermined stroke L. Performs reciprocating linear motion. As a result, vibration of a predetermined stroke is applied to the vibration input unit 99 of the shock absorber 98.

The size of the stroke L is twice the distance (eccentricity) between the shaft 110a and the crank pin 113, and the stroke L can be changed by changing this distance.
Can be changed. In other words,
The crank pin 11 is adjusted so that the distance between the shaft 110a and the crank pin 113 is 1/2 of the required stroke.
It is necessary to set the position of 3. Therefore, in the conventional inspection apparatus 100, the crank pin 113 is fastened by a bolt (not shown), and when changing the stroke L, the bolt is loosened, the position of the crank pin 113 is changed, and then the bolt is changed. I am trying to re-engage.

On the other hand, there is another vibration stroke setting mechanism shown in FIG. The vibration stroke setting mechanism 116 uses a hydraulic servo cylinder 117, and the stroke M can be changed by arbitrarily selecting a vibration waveform by the controller 118.

[0009]

However, in the above-described inspection apparatus 100, the crank pin 113 is used under the severe condition of vibration, so that the worker firmly tightens the bolt for fixing the crank pin 113. Had to conclude. Therefore, in order to change the position of the crank pin 113, it is difficult to tighten and remove the bolts and to align the crank pin 113, which requires a lot of man-hours. Particularly, in recent years, in evaluating the shock absorbing performance of a shock absorber, it is strongly desired to evaluate not only a constant stroke but also a plurality of strokes. For this reason, the work of setting the position of the crank pin 113 must be performed frequently, which increases the burden on the operator. Further, in order to accurately evaluate the shock absorbing performance of the shock absorber, it is necessary to accurately set the stroke of vibration.
Since the positioning of No. 3 is extremely difficult, the burden on the operator is further increased.

On the other hand, according to the vibration stroke setting mechanism 116 using the hydraulic servo cylinder, although the vibration stroke can be arbitrarily set, the response characteristic is inferior, and therefore the impact absorption performance evaluation for one cycle is evaluated. That is, it was not suitable for judging the change over time based on the displacement amount and the load.

Therefore, in view of the above situation, the present invention makes it possible to easily change the stroke when vibrating in the shock absorber inspection device, and to set the stroke accurately. The problem is the setting mechanism.

[0012]

A means for solving the problems will be described with reference to the schematic configuration diagram shown in FIG. The vibration stroke setting mechanism A according to the invention of claim 1 is arranged on a pedestal B, and is connected to one end of the lever D and a lever D which is angularly movable about a fulcrum shaft C. Driving means E for making a reciprocating angular movement of the lever D, a driven means G connected to the other end side of the lever D for transmitting the reciprocating angular movement of the lever D to a shock absorber F for inspection, the lever D and the The first slide means H is provided between the fulcrum shaft C and supports the fulcrum shaft C slidably with respect to the lever D, and is provided between the fulcrum shaft C and the gantry B, and Second slide means I for slidably supporting the fulcrum shaft C with respect to the frame B
And a fulcrum shaft moving means J for moving the fulcrum shaft C in the longitudinal direction of the lever D, and a restricting means K for restricting the movement of the lever D in the moving direction of the fulcrum shaft C.

Here, the "shock absorber" is a device that absorbs kinetic energy and absorbs mechanical shock by utilizing a spring, rubber, fluid or the like. Further, the operation of the fulcrum shaft moving means, that is, the movement of the fulcrum shaft may be performed by power of an electric motor or the like, or may be performed by labor of a worker (manual operation).

Therefore, according to the vibration stroke setting mechanism A of the first aspect of the present invention, when the drive means E is operated, power is applied to one end of the lever D, and the lever D makes an angular motion about the fulcrum axis C. That is, the reciprocating movement of the driving means E causes the lever D to make a reciprocating angular movement. And lever D
Since the driven means G is connected to the other end of the lever, the reciprocal angular movement of the lever D is transmitted via the driven means G to the shock absorber F for inspection.
Be transmitted to. As a result, the shock absorber F is given vibration of a predetermined stroke.

To change the stroke of vibration, the fulcrum shaft moving means J moves the fulcrum shaft C. At this time, since the movement of the lever D in the moving direction of the fulcrum shaft C is restricted by the restricting means K, the relative position of the fulcrum shaft C with respect to the lever D changes. That is, the length X from the fulcrum shaft C to one end side of the lever D (the portion to which the driving means E is connected) and the other end side of the lever D from the fulcrum shaft C (driven means G).
The ratio with the length Y up to the part where is connected changes. When the ratio between the length X and the length Y changes, the amplitude (amplification factor) on the other end side of the lever D with respect to the amplitude on the one end side of the lever D changes. That is, when the relative position of the fulcrum axis C is changed, the stroke of the driven means G changes.

The vibration stroke setting mechanism according to the invention of claim 2 is the vibration stroke setting mechanism A according to claim 1.
In, the electric motor L for driving the fulcrum shaft moving means J
And a positioning control means M for numerically controlling the electric motor L so that the position of the fulcrum shaft C becomes a target position.

Therefore, according to the vibration stroke setting mechanism of the second aspect of the invention, in addition to the operation of the vibration stroke setting mechanism of the first aspect of the invention, the positioning control means M determines the relative position of the fulcrum shaft C with respect to the lever D. The electric motor L is numerically controlled so as to reach the target position. That is, the electric motor L is operated to drive the fulcrum shaft moving means J, and the fulcrum shaft C is moved. Here, it is possible to change the position of the fulcrum shaft C so that a target stroke can be obtained by previously recognizing the relationship between the size of the stroke of the driven means G and the position of the fulcrum shaft C. Become. That is, the stroke of the driven unit G can be freely set by the positioning control unit M.

A vibration stroke setting mechanism according to a third aspect of the present invention is the vibration stroke setting mechanism A according to any one of the first and second aspects, wherein at least one of the driving means E and the driven means G is used. Is rotatably connected to the lever D via a link member N.

Therefore, according to the vibration stroke setting mechanism of the third aspect of the invention, in addition to the operation of the vibration stroke setting mechanism of the first aspect of the invention, the lever D is centered on the fulcrum axis C. In order to make a reciprocating angular motion,
One end side and the other end side of the lever D to which the driving means E and the driven means G are connected move in an arc shape. On the other hand, the following means G
Needs to be linearly reciprocated in order to input vibration to the shock absorber F. Therefore, in the present invention, the link member N
The motion state is converted by. Thereby, the linear movement of the driving means E allows the lever D to make an angular movement, and the angular movement of the lever D makes the driven means G to make a linear movement.

Since the lever D is connected to the fulcrum shaft C via the first slide means H, it can slide while making an angular motion. Therefore, the drive means E
Alternatively, if one of the driven means G is connected to the lever D via the link member N and the other is connected to the lever D without the link member N, the side to which the link member N is connected moves in an arc shape, The side to which the link member N is not connected moves linearly. That is, by connecting at least one of the driving means E and the driven means G via the link member N, the lever D can be smoothly angularly moved.

A vibration stroke setting mechanism according to a fourth aspect of the present invention is the vibration stroke setting mechanism A according to any one of the first and second aspects, wherein the drive means E is used.
Is a second electric motor P having a rotation axis O, first conversion means Q for converting the rotation of the rotation axis O into reciprocating linear motion, and first connecting member R for reciprocating linear motion by the first converting means Q.
And a first link member S, one end of which is pivotally supported by the first connecting member R and the other end of which is pivotally supported by one end of the lever D, and the driven means G is a vibration input of the shock absorber F. A second connecting member T connected to a portion, a second link member U having one end axially supported by the other end of the lever D and the other end axially supported by the second connecting member T, and the second connection The second conversion means V for restricting the movement of the member T to a linear movement is provided.

Therefore, according to the vibration stroke setting mechanism of the invention of claim 4, in addition to the operation of the vibration stroke setting mechanism of the invention of claim 1 or 2, the second electric motor P of the driving means E is When operated, the rotary motion of the rotary shaft O is converted into a linear motion by the first conversion means Q, and the first connecting member R makes a reciprocating linear motion. Further, the movement of the first connecting member R is transmitted to the one end side of the lever D via the first link member S. At this time, the first link member S
Has one end pivotally supported by the first connecting member R and the other end lever L
Since one end side of the lever D is pivotally supported, one end side of the lever D can be moved in an arc shape, and the lever D makes an angular motion about the fulcrum axis C.

On the other hand, the movement of the other end of the lever D is transmitted to the second connecting member T via the second link member U of the driven means G. At this time, one end of the second link member U is pivotally supported by the second connecting member T and the other end is pivotally supported by the other end side of the lever D, so that the other end side of the lever D moves in an arc shape. Can be transmitted to the second connecting member T. Furthermore, since the movement of the second connecting member T is restricted by the second converting means V so as to be a linear movement, the second connecting member T performs a reciprocating linear movement according to the movement of the other end of the lever D. . Thereby, the second connecting member T gives the shock absorber F vibration of a predetermined stroke.

The vibration stroke setting mechanism according to the invention of claim 5 is the vibration stroke setting mechanism A according to claim 4.
In the above, the restricting means K has a connecting rod whose one end is pivotally supported by the lever D and the other end is pivotally supported by the mount B. Here, the "mounting base" includes not only the mounting itself, but also members fixed to the mounting.

Therefore, according to the vibrating stroke of the invention of claim 5, in addition to the action of the vibrating stroke of the invention of claim 4, since the lever D and the pedestal B are connected via the connecting rod, the lever D is connected. Does not move more than necessary in the moving direction of the fulcrum axis C. Since both ends of the connecting rod are pivotally supported by the lever D and the gantry B, it is possible to incline the lever D with respect to the gantry B, that is, to make the lever D angularly move. Thus, even if both ends of the lever D are connected via the first link member S and the second link member U, the movement of the lever D is restricted by the connecting rod, and the lever D moves together with the fulcrum shaft C. It is prevented from falling.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION A vibration stroke setting mechanism 1 in a shock absorber inspection apparatus according to a first embodiment of the present invention will be described below.
Will be described with reference to FIGS. 2 to 8. 2 and 3 are a front view and a plan view showing the configuration of the vibration stroke setting mechanism 1, FIGS. 4 to 7 are sectional views showing the configuration of the vibration stroke setting mechanism 1, and FIG. 8 is a vibration stroke setting mechanism. It is explanatory drawing which shows the operation | movement of 1. 4 is shown in FIG.
5 is a sectional view taken along line AA in FIG.
6 shows a C-C cross section in FIG. 2, and FIG. 7 shows a D-D cross section in FIG.

Vibration stroke setting mechanism 1 of this embodiment
Is for giving a vibration of a desired stroke to the shock absorber 2, and as shown in FIG. 4, (1) the pedestal 3 and the fulcrum shaft 4 are provided as a basic configuration for generating the vibration. (Lever) 5 that makes an angular movement as a lever, drive means 6 connected to one end side (right side in FIG. 4) of the lever 5 for moving the lever 5, and the other end side (left side in FIG. 4) of the lever 5. ), Which is driven by the movement of the lever 5. Further, (2) as a structure for moving the fulcrum shaft 4 with respect to the longitudinal direction of the lever 5, the first slide means 8 for slidably supporting the fulcrum shaft 4 is provided.
A second slide means 9, a fulcrum shaft moving means 10 for moving the fulcrum shaft 4, an electric motor 11 for electrically operating the fulcrum shaft moving means 10, and a positioning control means 12 for numerically controlling the electric motor 11. I have it. Furthermore, (3)
A regulation unit 13 is provided as a configuration for regulating the moving direction of the lever 5.

First, the structure (1) (structure for generating vibration) will be specifically described. As shown in FIGS. 2 and 4, the gantry 3 includes a flat base plate 15, a plurality of leg members 16 attached to the lower surface of the base plate 15, and a second slide means provided on the upper surface of the base plate 15. 9a and the like, a mounting plate 15a, an electric motor support box 19 provided on the upper surface of the base plate 15 for supporting the second electric motor 17 and the speed reducer 18 of the driving means 6, the driving means 6 and the driven means 7. And a vertically long support case 22 to which an upper mounting portion 21 for holding the shock absorber 2 is attached. The support case 22 is a hollow cylinder, and the lever 5 is arranged in the space on the lower side thereof.

As shown in FIGS. 4, 5 and 7, the lever 5 has a substantially rectangular plate-shaped upper plate portion 24 and a lower surface of the upper plate portion 24 along the longitudinal direction of the upper plate portion 24. It is composed of two side plate portions 25, 25 provided, and has a generally U-shaped cross section. Further, on the left and right ends in the longitudinal direction of the upper plate portion 24, there are provided groove portions 26 penetrating in the vertical direction. The side plate portions 25 located on both sides of the groove portion 26 are formed with protrusions 25a that protrude below the other portions.

As shown in FIGS. 2, 4 and 5, the driving means 6 includes a second electric motor 17 which rotates at a predetermined rotational speed by supplying electric power, and a rotary shaft (not shown) of the second electric motor 17. ), Which reduces the rotation speed of the second electric motor 17 and amplifies the rotation torque.
A first converting means 28 for converting the rotation of the shaft 18a of the speed reducer 18 into a linear motion; a first connecting member 29 restricted by the first converting means 28 for reciprocating linear motion; a first connecting member 29 and a lever 5. And a first link member 30 that connects the projecting portions 25a. The first converting means 28 includes a crankshaft 31 formed eccentrically with respect to the shaft 18a.
And a first connecting rod 33 attached to the crankshaft 31 via a bearing 32, and two guide members 34 for restricting the movement of the first connecting member 29.

A first insertion groove 35 is formed on the upper surface of the first connecting member 29 so as to penetrate in the front-rear direction (direction B), and the bottom surface of the first connecting member 29 is penetrated in the left-right direction (direction A). The second insertion groove 36 is formed. That is, the top and bottom surfaces of the first connecting member 29 are substantially U-shaped in cross section, but the directions of the grooves are perpendicular to each other. In the first insertion groove 35,
A lower end portion of the first connecting rod 33 is inserted and connected to each other via an engaging pin 37 and a bearing 38. Further, the upper end portion of the first link member 30 is inserted into the second insertion groove 36, and is connected to each other via the engagement pin 39 and the bearing 40. That is, the first connecting rod 33 is attached to the first connecting member 29 in a state of being rotatable in the front-rear direction (direction B) about the engaging pin 37, and the first link member 30 is It is attached so as to be rotatable in the left-right direction (a direction) about the engagement pin 39. In addition, the first connecting member 29 has a front-back direction (direction B).
A flat plate-shaped restricting portion 41 is provided, and both end portions of the restricting portion 41 are attached to the sliding portion 42 of the guide member 34. That is, the first connecting member 29 having the restricting portion 41 is guided in the vertical direction along with the sliding portion 42 along the guide lot 43. The guide lot 43 is attached to the support case 2 via the mounting member 44.
It is fixed to the second wall surface 22a.

The first link member 30 penetrates through the groove portion 26 formed in the upper plate portion 24 of the lever 5 and is arranged between the side plate portions 25, 25 facing each other. The lower end of the first link member 30 extends to a height substantially matching the lower end of the protruding portion 25a of the side plate portion 25, and is connected to the protruding portion 25a via the engagement pin 45 and the bearing 46. That is, the lower end portion of the first link member 30 has the engagement pin 45.
Is rotatably supported about the lever 5 in the left-right direction (i direction). Both ends of the engagement pin 45 project from the side plate portions 25, 25, and a connecting rod 86 (described later) is attached to this projecting portion.

As shown in FIGS. 4 and 6, the driven means 7 includes the second connecting member 48 connected to the vibration input portion 2a of the shock absorber 2, the second connecting member 48 and the other end side of the lever 5 ( The second link member 49 that connects the protruding portion 25a on the left side in FIG. 4 and the second conversion unit 50 that restricts the movement of the second connecting member 48 to the linear movement are provided. Here, the second conversion means 50 has a second guide member 51.

On the upper surface of the second connecting member 48, a lower mounting portion 52 for holding the vibration input portion 2a of the shock absorber 2 is provided. That is, the shock absorber 2 for inspection is fixed at the upper end to the upper mounting portion 21 provided on the upper side of the support case 22, and at the lower end (the tip of the vibration input portion 2 a) at the lower mounting portion 52.
Vibration is applied while being fixed to. A third insertion groove 53 is formed on the lower surface of the second connecting member 48 so as to penetrate in the left-right direction (i direction).
The upper end portion of the second link member 49 is inserted into the above, and is connected to each other via the engaging pin 54 and the bearing 55. That is, the second link member 49 is the second connecting member 48.
On the other hand, it is attached so as to be rotatable in the left-right direction (the direction A) about the engagement pin 54. Further, the second connecting member 48 is provided with a flat plate-shaped regulating portion 56 extending in the front-rear direction (direction B), and both end portions of the regulating portion 56 are sliding portions 57 of the second guide member 51. Installed on. That is, the second connecting member 48 having the restricting portion 56.
Are guided so as to move vertically along the guide lot 58 together with the sliding portion 57. The guide lot 58 is attached to the wall surface 2 of the support case 22 via the mounting member 59.
It is fixed to 2b.

The second guide member 51 has a sliding portion 5
Displacement detection means 60 that outputs a signal according to the position of 7 is provided. That is, the displacement detecting means 60 can detect the displacement of the vibration input portion 2a of the shock absorber 2. Further, in the vicinity of the upper mounting portion 21 provided on the upper side of the support case 22, a load detection means 61 for detecting a load applied via the shock absorber 2 when a vibration input is applied to the shock absorber 2. Is provided. The output of the displacement detecting means 60 and the output of the load detecting means 61 are sent to a controller (not shown) and used as data for evaluating the shock absorber 2. Specifically, the controller applies vibration of a predetermined stroke to the vibration input portion 2a of the shock absorber 2, and the relationship between the displacement of the vibration input portion 2a and the load detected at that time is set to a predetermined predetermined value. If it is within the range, it is regarded as normal, and if it deviates from the range, it is regarded as abnormal.

The portion of the second link member 49 excluding the upper end portion penetrates the groove portion 26 formed on the other end side (the right end portion in FIG. 4) of the upper plate portion 24 of the lever 5 and is a side plate facing each other. It is arranged between the parts 25, 25. The lower end of the second link member 49 extends to a height substantially matching the lower end of the protruding portion 25a of the side plate portion 25, and is connected to the protruding portion 25a via the engagement pin 62 and the bearing 63. That is, the lower end portion of the second link member 49 is pivotally supported with respect to the lever 5 in a state of being rotatable in the left-right direction (direction A) about the engagement pin 62.

Next, the configuration (2) (the configuration for moving the fulcrum shaft 4) will be specifically described with reference to FIGS. 4 and 7. The first slide means 8 is the upper plate portion 2 of the lever 5.
Receiving member 65 fixed to the lower surface of 4 by bolts 64
And the sliding member 6 slidably fitted to the receiving member 65.
6 and a third link member 67 attached to the lower surface of the sliding member 66. The receiving member 65 is a rod-shaped member having triangular recesses 68 on the front surface and the rear surface (both side surfaces in FIG. 7), and is arranged along the longitudinal direction of the lever 5. The recess 68 is formed continuously in the longitudinal direction of the receiving member 65. A groove portion 69 for fitting the receiving member 65 is provided on the upper surface of the sliding member 66, and a protrusion portion 70 to be inserted into the recess 68 of the receiving member 65 is formed especially on the upper side of the groove portion 69. ing. That is, the sliding member 66 is provided in the recess 68 of the receiving member 65 in the protrusion portion 7.
When 0 is fitted, the lever 5 is suspended in a movable state along the longitudinal direction of the lever 5.

The second slide means 9 comprises two second receiving members 7 fixed to the upper surface of the mounting plate 15a by bolts 72.
3, 73, a second sliding member 74 slidably fitted to the second receiving members 73, 73, and two sheets of the second sliding member 74 that are attached to the upper surface of the second sliding member 74 so as to face each other. Connecting plate 75,
75 and a movable part mounting plate 76 mounted so as to be connected to the right end surfaces of these connecting plates 75, 75. The second receiving member 73, like the receiving member 65, is a rod-shaped member having a triangular recess 77, and the lever 5
Are arranged along the longitudinal direction. In addition, this depression 7
7 is continuously formed in the longitudinal direction of the second receiving member 73. The bottom surface of the second sliding member 74 is provided with two groove portions 78, 78 for fitting the two second receiving members 73, 73, and particularly the lower portion of the groove portion 78 has a second receiving member. A protrusion 79 to be inserted into the recess 77 of 73 is formed. That is, the second sliding member 74 is supported in a movable state along the longitudinal direction of the lever 5 by fitting the protrusion 79 into the recess 77 of the second receiving member 73.

The third link member 6 in the first slide means 8 is provided between the connecting plates 75, 75 of the second slide means 9.
The lower part of 7 is inserted, and the connecting plate 75 and the third link member 67 are connected to each other via the fulcrum shaft 4 (engaging pin) and the bearing 80. That is, the first slide means 8 is pivotally supported on the second slide means 9 in a state of being rotatable in the left-right direction (direction A) about the fulcrum shaft 4. That is, the lever 5 connected to the first slide means 8 is mounted on the mounting plate 1 to which the second slide means 9 is attached.
5a, the fulcrum shaft 4 is supported so as to be angularly movable.

As shown in FIG. 4, the fulcrum shaft moving means 10 has a ball screw 81 connected to the electric motor 11. The ball screw 81 includes a female screw portion 82 mounted on the movable portion mounting plate 76 and a rod-shaped male screw portion 83 screwed to the female screw portion 82 via a hard sphere (not shown). That is, the male screw portion 8 is driven by the power of the electric motor 11.
By rotating 3, the propulsive force is applied to the female screw portion 82, and the position of the second sliding member 74 with respect to the mounting plate 15a, that is, the position of the fulcrum shaft 4 can be displaced. The electric motor 11 is attached to the mounting plate 15a via the bracket 84. The electric motor 11 is numerically controlled by the positioning control means 12. The positioning control means 12 sets the stroke of the driven means 7 to a desired size by controlling the position of the fulcrum shaft 4 via the electric motor 11. Specifically, the positioning control means 12 stores in advance the relationship between the position of the fulcrum shaft 4 and the stroke size of the driven means 7 obtained when the fulcrum shaft 4 is moved to that position, and the instructing means (Not shown)
When the target stroke is instructed by, for example, the position of the fulcrum shaft 4 with respect to the target stroke size (target position)
Is determined, and the electric motor 11 is numerically controlled so that the fulcrum shaft 4 moves to the target position.

By the way, one end side (right side in FIG. 4) of the lever 5 is pivotally supported by the first link member 30, and the other end side (left side in FIG. 4) of the lever 5 is connected to the second link member 49. Since it is pivotally supported, when the fulcrum shaft moving means 10 moves the fulcrum shaft 4, the lever 5 may oscillate in the left-right direction (direction a) according to the movement of the first sliding means 8. Further, when the lever 5 makes a reciprocal angular movement, there is a possibility that the lever 5 may swing in the left-right direction (direction A). When swinging in the left-right direction in this way, the position of the fulcrum shaft 4 with respect to the lever 5 is not fixed, and an accurate vibration stroke cannot be obtained. Therefore, the vibration stroke setting mechanism 1 of the present embodiment
Then, in order to regulate the movement of the lever 5 in the left-right direction (the movement direction of the fulcrum shaft 4), the regulation means 13 is provided as the configuration of (3) above.

As shown in FIGS. 4, 5 and 7, the regulating means 13 is composed of a holding member 85 and a connecting rod 86. The holding member 85 is a vertically long member that is erected on the upper surface of the mounting plate 15a and in front of and behind the second slide member 9, respectively. The connecting rod 86 has a plate-like appearance, one end of which is pivotally supported by the lever 5 via an engaging pin 45 attached to the projecting portion 25a of the side plate portion 25 of the lever 5, and the other end of which is a holding member 85. Is supported on the upper part of. As described above, the one side plate portion 25 of the lever 5 is connected to the holding member 85 via the connecting rod 86, so that the movement of the lever 5 in the moving direction of the fulcrum shaft 4 is restricted. However, since both ends of the connecting rod 86 are axially supported by the holding member 85 and the lever 5, respectively, the lever 5 should be inclined with respect to the holding member 85, that is, the lever 5 should be inclined.
It is possible to make a reciprocating angular motion.

Next, the operation of the vibration stroke setting mechanism 1 of this embodiment will be described with reference to FIGS. 4, 5 and 8. When the second electric motor 17 (see FIG. 2) of the driving means 6 operates, the shaft 18a of the speed reducer 18 rotates, and the rotational movement of the shaft 18a is converted into a linear movement by the first connecting rod 33 and the guide member 34. The first connecting member 29 reciprocates linearly. Furthermore, the first connecting member 29
Is transmitted to the protrusion 25a formed on one end side of the lever 5 via the first link member 30. At this time, one end of the first link member 30 is pivotally supported on the upper end of the first connecting member 29 and the other end is pivotally supported on one end side of the lever 5, so that one end side of the lever 5 is moved in an arc shape. Then, the lever 5 makes a reciprocating angular motion about the fulcrum shaft 4.

At this time, the driven means 7 is attached to the other end of the lever 5.
Is connected, the reciprocal angular movement of the lever 5 is transmitted to the vibration input portion 2a of the shock absorber 2 for inspection through the driven means 7. Specifically, first, the movement of the lever 5 is transmitted to the second connecting member 48 via the second link member 49 of the driven unit 7. At this time, one end of the second link member 49 is pivotally supported by the lower end of the second connecting member 48 and the other end is pivotally supported by the other end side of the lever 5, so that the other end side of the lever 5 has an arc shape. Can be transmitted to the second connecting member 48. Further, since the movement of the second connecting member 48 is restricted by the second guide portion 51, the second connecting member 48 makes a reciprocating linear movement according to the movement of the other end side of the lever 5. As a result, the second connecting member 48 gives the vibration input section 2a of the shock absorber 2 vibration of a predetermined stroke.

Then, with the shock absorber 2 being vibrated,
The shock absorbing performance of the shock absorber 2 is evaluated. Specifically, while vibrating the shock absorber 2, the output of the displacement detection means 60 and the output of the load detection means 61 are detected, and the vibration input section 2 is detected.
When the relationship between the displacement of a and the load deviates from the predetermined range, it is determined to be abnormal. In addition, when it is determined that there is an abnormality, it is desirable to notify by a notification means such as a lamp, a display, or a voice.

On the other hand, in order to change the stroke of the driven means 7, the positioning control means 12 numerically controls the electric motor 11. That is, the ball screw 81 is driven by the operation of the electric motor 11, and the fulcrum shaft 4 is moved via the first slide means 8 and the second slide means 9.

At this time, since the movement of the lever 5 in the moving direction of the fulcrum shaft 4 is restricted by the restricting means 13,
The relative position of the fulcrum shaft 4 with respect to the lever 5 changes. When the relative position of the fulcrum shaft 4 changes, the amplitude of the other end of the lever 5 (amplification factor) with respect to the amplitude of the one end of the lever 5
Will change. For example, as shown in FIG.
When the ratio of the distance X to the one end side of the lever 5 and the distance Y to the other end side of the lever 5 is 3: 1 with reference to, the amplitude L1 on the one end side of the lever 5 and the other end of the lever 5 are Side amplitude L
The ratio with 2 is 3: 1 and the amplification factor is 1/3. Further, as shown in FIG. 8B, when the ratio of the distance X and the distance Y is 5: 8, the amplitude L1 on one end side and the amplitude L on the other end side are
The ratio with 2 is 5: 8, and the amplification factor is 1.6 (8/5).

Since the relationship between the position of the fulcrum shaft 4 and the magnitude of the stroke of the driven means 7 is stored in the positioning control means 12 in advance, when the target stroke is instructed by the instructing means or the like, The target position of the fulcrum shaft 4 with respect to the target stroke is determined, and the electric motor 11 is numerically controlled so as to move the fulcrum shaft 4 to the target position. By performing the numerical control in this way, the driven means 7 can be vibrated with a desired stroke. The operation of moving the fulcrum shaft 4 can be performed not only while the driving means 6 is stopped, that is, while the lever 5 is stopped, but also while the lever 5 is moving.

As described above, in the vibration stroke setting mechanism 1 of the first embodiment, the stroke of the driven means 7 is changed by changing the relative position of the fulcrum shaft 4 to the lever 5 by the fulcrum shaft moving means 10. The stroke changing work can be easily performed. Further, by making the length of the lever 5 (that is, the movable length of the fulcrum shaft 4) relatively longer than the stroke of the vibration, the size of the vibration stroke that actually needs to be adjusted is set to the fulcrum shaft. Since the adjustment can be performed in the amplified length of the moving distance of 4, the stroke size can be set accurately. In particular, since the position of the fulcrum shaft 4 is numerically controlled by the positioning control means 12, it is possible to set the position of the fulcrum shaft 4 in an extremely short time and with extremely high accuracy.

Further, in the vibration stroke setting mechanism 1, the driving means 6 and the driven means 7 are pivotally supported by the lever 5 via the link members 30 and 49, so that the reciprocating linear motion of the driving means 6 is performed by the lever 5. The reciprocating angular motion of the lever 5 can be converted into the reciprocating linear motion of the driven means 7. That is, since both ends of the lever 5 can be moved in an arc shape, the lever 5 can be smoothly moved.

Next, the vibration stroke setting mechanism 91 in the shock absorber inspection apparatus according to the second embodiment of the present invention will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.
In this vibration stroke setting mechanism 91, the structure of the driving means 92 for generating vibration and the structure of the restricting means 93 for restricting the movement of the lever 5 in the left-right direction (i direction) are the same as those in the first embodiment. However, the other configurations are substantially the same.

The driving means 92 has the second electric motor 17 (see FIG. 2), the speed reducer 18, the first converting means 28, and the first connecting member 29, as in the first embodiment. However, this driving means 92 does not correspond to the first link member 30, and the first connecting member 29 is directly pivotally supported on one end side (right end in FIG. 9) of the lever 5. That is, since the reciprocating linear motion of the first connecting member 29 is directly transmitted to the one end side of the lever 5, the motion of the one end side of the lever 5 is the reciprocating linear motion in the vertical direction. Since the lever 5 can slide with respect to the fulcrum shaft 4 while making an angular motion, even if the one end side of the lever 5 is linearly moved, the lever 5 is moved.
Can be angularly moved smoothly.

The regulating means 93 of this embodiment does not have the connecting rod as shown in the first embodiment. That is, in this vibration stroke setting mechanism 91, since one end side of the lever 5 is directly pivotally supported by the first connecting member 29, the lever 5 moves in the left-right direction (a direction) with respect to the first connecting member 29. There is no such thing. That is, it is possible to prevent the lever 5 from swinging in the left-right direction. Thus, in the second embodiment, the fact that the first connecting member 29 is directly pivotally supported on the one end side of the lever 5 itself functions as the restricting means 93.

The operation and effect of the vibration stroke setting mechanism 91 of the second embodiment is substantially the same as that of the vibration stroke setting mechanism 1 of the first embodiment, but the first link member used in the first embodiment is used. Also, since the connecting rod is not necessary, the number of parts can be reduced and the product cost can be reduced.

The present invention has been described above with reference to two preferred embodiments, but the present invention is not limited to these embodiments, and as shown below, is within the scope of the present invention. In, various improvements and design changes are possible.

That is, although the fulcrum shaft moving means 10 is driven by the electric motor 11 in the first and second embodiments, it may be operated by the labor (manual operation) of the operator. Specifically, if a handle is provided on the male screw portion 83 of the ball screw 81, the fulcrum shaft 4 can be moved to an arbitrary position by the rotation of the handle.

In the first embodiment, one end of the connecting rod 86 is connected to one end of the lever 5 (the side to which the driving means 5 is connected).
Although it is shown that the lever is pivotally supported, it may be pivotally supported on the other end side of the lever 5 (the side to which the driven means 7 is connected). Even in this case, the same effect as that of the first embodiment can be obtained.

Furthermore, in the second embodiment, the first connecting member 29 is directly supported on one end side of the lever 5, but the second connecting member 48 of the driven means 7 is attached to the other end side of the lever 5. Alternatively, the first connecting member 29 of the driving means 6 may be directly pivotally supported to one end side of the lever 5 via the first link member 30. Even in this case, the same effect as that of the second embodiment can be obtained.

[0059]

As described above, the vibration stroke setting mechanism in the shock absorber inspection apparatus according to the first aspect of the present invention changes the stroke of vibration given to the shock absorber only by changing the relative position of the fulcrum shaft with respect to the lever. Therefore, the stroke can be easily changed. Also, by making the movable length of the fulcrum shaft relatively large relative to the stroke size, the size of the vibration stroke that actually needs to be adjusted can be adjusted to the amplified range of the fulcrum shaft movement distance. Because it can be adjusted within
The stroke size can be set accurately.

In addition to the effect of the vibration stroke setting mechanism of the first aspect of the present invention, the vibration stroke setting mechanism of the shock absorber inspection apparatus of the second aspect of the present invention is characterized in that the relative position of the fulcrum shaft with respect to the lever is determined by the positioning control means. Since it is numerically controlled, it can be set with extremely high accuracy in a short time.

The vibration stroke setting mechanism in the shock absorber inspection device of the third aspect of the present invention is the first or second aspect of the present invention.
In addition to the effect of the vibration stroke setting mechanism according to any one of the above aspects, the lever can be angularly moved by the linear movement of the driving means, and the power can be reliably transmitted from the driving means to the lever.

The vibration stroke setting mechanism in the shock absorber inspecting apparatus according to the fourth aspect of the present invention is the vibration stroke setting mechanism according to the first or second aspect.
In addition to the effect of the vibration stroke setting mechanism of any one of the inventions, the reciprocating linear motion of the driving means can be converted into the reciprocating angular motion of the lever, and the reciprocating angular motion of the lever is converted into the reciprocating linear motion of the driven means. be able to. Therefore, since both ends of the lever can be moved in an arc shape, the lever can be smoothly moved.

In addition to the effect of the vibration stroke setting mechanism of the invention of claim 4, the vibration stroke setting mechanism of the shock absorber inspection device of the invention of claim 5 has the advantage that, even if both ends of the lever are both pivotally supported. Does not swing in the moving direction of the fulcrum shaft, so that the position of the fulcrum shaft with respect to the lever can be maintained at the set position. That is, it is possible to give the shock absorber a stroke having an accurate size according to the amplitude of the reciprocating linear motion of the driving means, and it is possible to enhance the reliability in the evaluation of the shock absorber.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram for explaining configuration requirements of the present invention.

FIG. 2 is a front view showing the configuration of the vibration stroke setting mechanism according to the first embodiment of the present invention.

FIG. 3 is a plan view showing a configuration of a vibration stroke setting mechanism according to the first embodiment of the present invention.

4 is a cross-sectional view showing a cross section taken along the line AA of FIG.

5 is a cross-sectional view showing a BB cross section of FIG. 2;

6 is a cross-sectional view showing a cross section C-C in FIG.

FIG. 7 is a cross-sectional view showing a DD cross section of FIG. 4;

FIG. 8 is an explanatory diagram showing the operation of the vibration stroke setting mechanism according to the first embodiment of the present invention.

FIG. 9 is a sectional view showing a configuration of a vibration stroke setting mechanism according to a second embodiment of the present invention.

FIG. 10 is an explanatory diagram showing a configuration of a conventional inspection device.

FIG. 11 is an explanatory diagram showing a configuration of a conventional vibration stroke setting mechanism.

FIG. 12 is an explanatory diagram showing a configuration of another conventional vibration stroke setting mechanism.

[Explanation of symbols]

1 Vibration stroke setting mechanism 2 shock absorber (shock absorber for inspection) 3 mounts 4 fulcrum axis 5 levers 6 Drive means 7 Follower 8 First slide means 9 Second slide means 10 fulcrum shaft moving means 11 electric motor 12 Positioning control means 13 Regulation means 17 Second electric motor 28 First conversion means 29 First connection member 30 First Link Member (Link Member) 48 Second connecting member 49 Second link member (link member) 50 Second conversion means 86 connecting rod 91 Vibration stroke setting mechanism 92 Drive means 93 Regulation means

Claims (5)

(57) [Claims] 1. A lever that is disposed on a pedestal and is capable of angular movement about a fulcrum shaft; drive means that is connected to one end of the lever and that performs reciprocal angular movement of the lever; Provided between the lever and the fulcrum shaft, the driven device being connected to the other end side and transmitting the reciprocal angular movement of the lever to the shock absorber for inspection, and being able to slide the fulcrum shaft with respect to the lever. A first slide means for supporting the fulcrum shaft in a stable state, a second slide means provided between the fulcrum shaft and the mount for supporting the fulcrum shaft in a slidable state with respect to the mount, A vibration stroke setting mechanism in a shock absorber inspection apparatus, comprising: a fulcrum shaft moving means for moving the lever in a longitudinal direction; and a restricting means for restricting a movement of the lever in a moving direction of the fulcrum shaft. 2. An electric motor for driving the fulcrum shaft moving means, and a positioning control means for numerically controlling the electric motor so that the position of the fulcrum shaft becomes a target position. A vibration stroke setting mechanism in the shock absorber inspection device described. 3. The method according to claim 1, wherein at least one of the driving means and the driven means is rotatably attached to the lever via a link member. A vibration stroke setting mechanism in the shock absorber inspection device described in (1). 4. The driving means includes a second electric motor having a rotating shaft, a first converting means for converting the rotation of the rotating shaft into a reciprocating linear motion, and a first connection for reciprocating linear motion by the first converting means. A first link member, one end of which is pivotally supported by the first connecting member and the other end of which is pivotally supported by one end of the lever, and the driven means is connected to a vibration input unit of the shock absorber. A second link member, one end of which is pivotally supported by the other end of the lever and the other end of which is pivotally supported by the second link member, and the movement of the second link member is restricted to a linear motion. The vibration stroke setting mechanism in the shock absorber inspection device according to claim 1 or 2, further comprising: 5. The shock absorber inspection apparatus according to claim 4, wherein the restricting means includes a connecting rod whose one end is pivotally supported by the lever and the other end is pivotally supported by the mount. Vibration stroke setting mechanism.