JP4955503B2 - testing machine - Google Patents

Description

  The present invention relates to a shock absorber testing machine.

  This type of tester used for shock absorber performance tests includes, for example, a vibrator that holds the lower end of the shock absorber and applies vibration to the shock absorber, and a weight that applies a load to the upper end of the shock absorber. There is known a configuration including a load means and capable of detecting the damping force generated by the shock absorber and the stroke displacement of the shock absorber (for example, see Patent Document 1).

According to this testing machine, the load condition and vibration frequency applied to the shock absorber can be changed, and the performance test of the shock absorber can be performed while changing the vibration condition. A test can be performed.
JP 2006-184158 A

  Here, in particular, the shock absorber interposed between the vehicle body and the axle of the automobile exhibits a damping force to attenuate the vibration of the vehicle body to improve the driving stability in the vehicle and improve the riding comfort in the vehicle. He also plays a role.

  In recent years, demands for improving the ride quality of automobiles are increasing, and the realization of a good ride quality is one of the important performances of a shock absorber for a vehicle.

  However, when evaluating the performance related to the ride comfort of this shock absorber, since the ride comfort is perceived by humans, it is generally judged whether the ride comfort is good or bad only from the numerical data of the shock absorber. However, it is difficult to evaluate the performance related to the ride comfort in the conventional testing machine that can collect only the information related to the performance of the shock absorber as numerical data.

  Therefore, it is necessary to perform a sensory test in order to evaluate the performance related to the ride comfort. In this sensory test, it is necessary to mount a shock absorber on the vehicle and run the vehicle to conduct a field test. There is a problem that the cost is high.

  Therefore, the present invention was devised to improve the above-mentioned problems, and the object of the present invention is to provide a testing machine capable of performing a sensory test of a shock absorber at a low cost and simply. is there.

  In order to achieve the above-described object, the test machine in the problem solving means of the present invention includes a support base that holds the lower end of the shock absorber and supports the shock absorber in an upright state, and prevents the shock absorber from contracting. A locking means enabling the expansion and contraction and a seat attached to the upper end of the shock absorber were provided.

  According to the testing machine of the present invention, the shock absorber is mounted on the vehicle without performing a large-scale and costly on-site test such as mounting the shock absorber to be tested on the vehicle and running the vehicle. This makes it possible to perform a sensory test on the shock absorber at low cost and with ease.

  The present invention will be described below based on the embodiments shown in the drawings. FIG. 1 is a side view of a testing machine according to an embodiment. FIG. 2 is a side view of a testing machine according to another embodiment.

  As shown in FIG. 1, the testing machine E <b> 1 in the embodiment includes a support base 1 that is connected to the lower end of the shock absorber D and supports the shock absorber D in an upright state, and at least prevents the shock absorber D from contracting and cushions. The lock means 2 that allows the expansion and contraction of the device D and the seat 3 attached to the upper end of the shock absorber D are provided.

  In the testing machine E1, the operator sits on the seat 3 in a state (locked state) in which the shock absorber D is prevented from contracting by the lock means 2, and the lock means 2 unlocks the shock absorber D. The shock absorber D is freely expanded and contracted so that the operator can experience the performance of the shock absorber D. In other words, the operator can perform a sensory test of the shock absorber D on the spot using the test machine E1 without traveling with the shock absorber D mounted on the vehicle.

  The shock absorber D is omitted in specific configuration, but the cylinder 4 and the two pressure chambers slidably inserted into the cylinder 4 and filled with the working fluid in the cylinder 4 are not shown. A piston and a piston rod 5 having one end connected to the piston are configured to cause the working fluid to move back and forth between the pressure chambers and to provide resistance to the flow of the fluid to generate a predetermined damping force during expansion and contraction. It is like that.

  A spring receiver 6 is provided on the outer periphery of the cylinder 4, and a knuckle bracket 7 is attached to the lower end of the cylinder 4.

  Hereinafter, each part will be described in detail. The support 1 includes a base 1a, a connecting part 1b that is swingably attached to the base 1a and connected to the lower end of the shock absorber D, and is rotatable to the base 1a. A horizontally mounted screw shaft 1c, a nut member 1d screwed to the screw shaft 1c, and a rod 1e that is swingably coupled to both the nut member 1d and the connecting portion 1b are provided.

  In the case of this embodiment, the base 1a is a rectangular plate, and is set to a length and a width that can prevent the tester E1 from falling over regardless of whether it is stationary or not. The shock absorber D and the seat 3 Can be stably supported. The shape of the base 1a is not limited to a rectangular shape, and may be a shape that can stably support the shock absorber D and the seat 3. Further, the base 1a is firmly fixed to the floor or the like with a bolt or the like. In order to prevent the test machine E1 from falling, the shape and size of the base 1a are not particularly limited.

  The connecting portion 1b is hinged to the base 1a so as to be swingable with respect to the base 1a, and is connected to the knuckle bracket 7 provided at the lower end of the shock absorber D by bolts and connected to the lower end of the shock absorber D. It has come to be. In this case, the knuckle bracket 7 is provided at the lower end of the cylinder 4 of the shock absorber D, and the connecting portion 1b may be connected to the lower end of the shock absorber D by using the knuckle bracket 7. In the case of the shock absorber D that does not include the knuckle bracket 7, the connecting portion 1 b may be configured so that the lower end of the shock absorber D can be gripped.

  A screw shaft 1c is attached to the base 1a so as to be rotatable around the shaft. The screw shaft 1c is attached horizontally to the base 1a, and a nut member 1d is screwed together.

  Further, the nut member 1d is hinged to the rod 1e, and the rod 1e is hinged to the connecting portion 1b. Accordingly, the nut member 1d is prevented from rotating with respect to the base 1a via the connecting portion 1b and the rod 1e, and when the screw shaft 1c is rotated, the nut member 1d is linearly moved left and right in FIG. 1 on the screw shaft 1c. Will exercise. That is, the screw shaft 1c and the nut member 1d constitute a feed screw mechanism, and when the nut member 1d moves to the right in FIG. 1, the movement of the nut member 1d is transmitted to the connecting portion 1b via the rod 1e. Then, the connecting portion 1b rotates clockwise in FIG. 1 with the hinge coupling portion with the base 1a as a fulcrum, and conversely, when the nut member 1d moves in the left direction in FIG. 1, the connecting portion 1b is connected to the base 1a. 1 to rotate counterclockwise in FIG. That is, the base 1a, the connecting portion 1b, the screw shaft 1c, the nut member 1d, and the rod 1e form a slider crank mechanism, and the support base 1 supports the shock absorber D in an upright state. The connecting member 1b is rotated by driving the nut member 1d so that the angle of the shock absorber D with respect to the base 1a can be adjusted. In addition, since the feed screw mechanism is employed in the slider portion, it is not necessary to fix the nut member 1d functioning as a slider, and the angle adjustment of the shock absorber D is facilitated. In FIG. 1, the shock absorber D is supported by being slightly tilted to the left in FIG. 1, but naturally the shock absorber D may be supported vertically with respect to the base 1a. Is possible. Moreover, although the screw shaft 1c is horizontally attached to the base 1a in this case, it is not limited to this.

  Subsequently, the locking means 2 is a crank mechanism including a lower joint 2a that is connected to the lower end of the shock absorber D and swings, and an upper joint 2b that is connected to the upper end of the shock absorber D and swings. .

  Specifically, the lower joint 2 a is hinged to a grip portion 2 c that grips the outer periphery of the cylinder 4, is connected to the lower end of the shock absorber D, and can swing. The lower joint 2a can be attached to an arbitrary position of the cylinder 4 by the grip portion 2c.

  The upper joint 2b is hinged to an angle adjusting member 8 fixed to the upper end of the piston rod 5, and is connected to the upper end of the shock absorber D so as to be swingable. A bar 10 capable of abutting on the upper left side of the upper joint 2b is swingably attached to the shaft 9 that hinges the upper joint 2b and the angle adjusting member 8 via an arm 11. An operating rod 12 capable of swinging the bar 10 is attached. Further, the lower joint 2a and the upper joint 2b are connected to the shock absorber D directly, and also indirectly through the intermediate members such as the grip portion 2c and the angle adjusting member 8 as described above. Are also included.

  Further, the lower joint 2a and the upper joint 2b are hinged to each other so that they can rotate with each other, and a convex stopper 2d extends at the distal end of the lower joint 2a.

  When the stopper 2d is rotated to the left in FIG. 1 where the tip that is the upper end of the lower node 2a and the tip that is the lower end of the upper node 2b are beyond one point, the stopper 2d is shown in FIG. It collides with the right side to prevent both from turning to the left. Therefore, in the locking means 2, when the stopper 2d prevents the lower joint 2a and the upper joint 2b from rotating to the left, the cylinder 4 to which the lower joint 2a is attached and the piston rod to which the upper joint 2b is attached. 5 is prevented from approaching further, the shock absorber D is prevented from contracting, and the shock absorber D is kept locked.

  On the other hand, when the tip of the lower joint 2a and the tip of the upper joint 2b are rotated to the right in FIG. 1, which is the other side, the stopper 2d does not collide with the upper joint 2b, Since the upper node 2b can freely rotate, the distance between the cylinder 4 to which the lower node 2a is attached and the piston rod 5 to which the upper node 2b is attached becomes free, and the buffer D can be freely expanded and contracted. When shifting from the locked state to the state allowing the expansion and contraction of the shock absorber D, the bar 10 is rotated counterclockwise in FIG. 1 by operating the operating rod 12 to the left side in FIG. 1 of the upper joint 2b. It is only necessary to collide and rotate the tip of the upper node 2b to the right in FIG. Then, the tip of the long arm 11 is used as a point of action, and the tip of the short arm 11 is used as the action point compared to the rod 12 that is attached to the upper joint 2b. Since the locked state can be released with force, the operator of the testing machine E1 is not burdened.

  The locking means 2 may be simply constituted by a bar or other structure interposed between the seat 3 and the support base 1 in addition to the case where the locking means 2 is constituted by the lower node 2a and the upper node 2b. By configuring the locking means 2 with the lower section 2a and the upper section 2b, it is advantageous in that the locking means 2 can be made compact and can be locked and unlocked easily and with a light load. In addition, the lock means 2 is only required to be realized by selecting at least two functions of preventing the contraction of the shock absorber D and allowing the expansion and contraction. It is also possible to prevent both.

  Subsequently, the angle adjusting member 8 is fixed to the piston rod 5 which is the upper end of the shock absorber D, and the base 8a is hinged to the upper node 2b, and is hinged to the base 8a and can swing with respect to the base 8a. And a rocking portion 8 b fixed to the seat 3. The seat 3 includes a seat 3a to which the angle adjusting member 8 is fixed and a backrest 3b.

  The base 8a is fixed to the piston rod 5 and also functions as an upper spring receiver. Between the base 8a and the spring receiver 6 provided on the outer periphery of the cylinder 4 of the shock absorber D, a suspension spring 13 is provided. Is intervening. Therefore, the seat 3 is elastically supported by the suspension spring 13.

  Further, as described above, the base 8a and the upper node 2b of the locking means 2 can swing with respect to each other via the shaft 9, and the swinging portion 8b is hinged to the right end of the base 8a in FIG. Yes.

  The swinging portion 8b includes a swinging portion main body 8c fixed to the lower surface of the seat 3a of the seat 3, and an arc-shaped long hole 8d provided at the left end of the swinging portion main body 8c in FIG. The center of curvature of the long hole 8d coincides with the center of the hinge coupling portion with the base portion 8a at the right end in FIG.

  A screw shaft portion of a bolt 14 screwed to the base portion 8a is inserted into the long hole 8d, and the bolt 14 is screwed into the base portion 8a so that the head portion of the bolt 14 and the base portion 8a can swing the swinging portion main body. By sandwiching 8c, the swinging portion 8b can be positioned and fixed with respect to the base portion 8a. Therefore, the angle formed by the swinging portion 8b and the base portion 8a can be arbitrarily adjusted within the range of the long hole 8d, and the angle of the shock absorber D with respect to the base 1a can be set to other than 90 degrees in FIG. Even if set, the seat 3a of the seat 3 can be adjusted horizontally with respect to the base 1a. In FIG. 1, the shock absorber D is supported by being slightly tilted to the left in FIG. 1, so that the angle is adjusted by the angle adjusting member 8 so that the seat 3a becomes horizontal with respect to the base 1a. It is in a state adjusted to.

  The testing machine E1 is configured as described above. Next, a method of testing the performance of the shock absorber D by the testing machine E1 will be described.

  First, the lower end of the cylinder 4 of the shock absorber D is attached to the connecting portion 1b of the support base 1 in the test machine E1, and the seat 3 is attached to the upper end of the piston rod 5 of the shock absorber D via the base portion 8a of the angle adjusting member 8. Install. When the seat 3 is attached to the shock absorber D, the suspension spring 13 is also attached together.

  Then, the seat 3 is supported by the step force generated by the compression of the suspension spring 13, and the grip portion 2 c in the lock unit 2 is attached to the cylinder 4 in this state.

  At this time, it is preferable that the lower node 2a and the upper node 2b are not linear, and it is desirable that the angle formed by the lower node 2a and the upper node 2b be less than the angle regulated by the stopper 2d.

  This is because if the lower joint 2a and the upper joint 2b are in the shape of a straight line, which is the ideal point, it is impossible to shift to the locked state by the stopper 2d when there is no load on the sheet 3. In addition, it is desirable that the angle formed by the lower node 2a and the upper node 2b is equal to or smaller than the angle regulated by the stopper 2d. Even if there is no load on the sheet 3, the stopper 2d This is because it is possible to realize a locked state that prevents the shock absorber D from contracting.

  After that, the adjustment of the mounting angle of the shock absorber D to the support base 1 and the angle of the seat 3a by the angle adjusting member 8 are adjusted, and the upper end and the upper joint 2b, which are the tips of the lower joint 2a, until the stopper 2d works. The lower end, which is the leading end, is rotated leftward in FIG. Note that the angle of the seat 3a should be horizontal, so that the posture of the operator sitting on the seat 3 can be stabilized and the test can be performed safely, but the seating surface angle of the seat 3a may be other than horizontal depending on the test contents. May be set.

  Subsequently, the operator sits on the seat 3 and operates the operation rod 12 while sitting down to unlock the shock absorber D by the lock means 2 so that the shock absorber D can be freely contracted.

  Then, since the weight of the operator sitting on the seat 3 loses the support by the lock means 2 and acts on the suspension spring 13 and the shock absorber D, the seat 3 vibrates and the shock absorber D and the suspension spring 13 contract. After a while, the vibration of the seat 3 converges due to the damping action of the shock absorber D.

  The operator can experience the vibration state of the seat 3 and the damping action of the shock absorber D by continuing to sit on the seat 3 from the start to the end of the vibration of the seat 3, and the performance of the shock absorber D with respect to the riding comfort. Sensory tests necessary for evaluation can be performed.

  That is, in this testing machine E1, a sensory test of the shock absorber D is performed on the spot without performing a large-scale and costly on-site test such as attaching the shock absorber D to be tested to the vehicle and running the vehicle. It becomes possible.

  Therefore, according to this testing machine E1, the sensory test of the shock absorber D can be performed inexpensively and easily.

  Further, in the case of this testing machine E1, the support base 1 can adjust the angle of the shock absorber D with respect to the base 1a. Since the acting load can be applied to the shock absorber D obliquely, the influence of the frictional force of a seal member (not shown) that seals the outer periphery of the piston rod 5 in the shock absorber D can also be experienced. That is, in this testing machine E1, the seal member of the shock absorber D can be evaluated. In addition, when it is not necessary to evaluate the influence of the frictional force of the seal member, the angle adjustment function in the support base 1 can be omitted. In this case, the shock absorber D is simply determined in advance on the base 1a. It should be possible to install it at an angle.

  In addition, it is possible to attach the lower node 2a to the base 1a of the support base 1 so as to be swingable, and to attach the upper node 2b to the upper end side of the shock absorber D so as to be swingable. In this case, since the locking means 2 is composed of the lower node 2a and the upper node 2b, and the lower node 2a can be mounted at an arbitrary position of the cylinder 4, suspensions having different spring constants can be mounted on the shock absorbers having different overall lengths. There is an advantage that it can be applied without difficulty to the spring and that the locked state can be reliably realized even when the load is not applied to the seat 3 by adjusting the mounting position to the shock absorber D. Further, since the lower joint 2a is mounted not at the piston rod 5 but at an arbitrary position of the cylinder 4 in this way, there is no possibility that the expansion and contraction of the shock absorber D is hindered. In this case, the shock absorber D is attached to the testing machine E1 in an upright posture in which the cylinder 4 is downward, but when the cylinder 4 is attached in an inverted posture in which the cylinder 4 is upward, the upper node 2b is disposed above. If the cylinder 4 can be mounted at an arbitrary position, it is possible to enjoy the above advantages without hindering expansion and contraction of the shock absorber D.

  Subsequently, a test machine E2 according to another embodiment in which the automation unit 20 is mounted so that locking and unlocking by the locking means 2 can be performed without manual operation will be described.

  The testing machine E2 in this other embodiment eliminates the bar 10, the arm 11 and the operating rod 12 in the testing machine E1 of one embodiment, and instead performs the automation unit 20 that performs locking and unlocking by the locking means 2. The only difference is that it has been added.

  Therefore, in the description of the testing machine E2 in the other embodiment, the same members as those in the testing machine E1 of the embodiment will be given the same reference numerals and detailed description thereof will be omitted.

  The automation unit 20 which is a different part will be described in detail. The automation unit 20 includes a shaft 21 rotatably attached to the base 1a, and a counterclockwise direction in FIG. The first arm 22 that collides with the lower joint 2a and rotates the tip of the lower joint 2a to the left in FIG. 2, which is one side, and extends from the shaft 21 and has the shaft in the other direction. 2 When rotating clockwise, the second arm 23 collides with the lower node 2a and rotates the tip of the lower node 2a to the right in FIG. 2 as the other side, and the third arm 24 extends from the shaft 21. And a cylinder device 25 interposed between the third arm 24 and the base 1a by being hinged.

  The automation unit 20 is attached to the base 1a of the support base 1 as described above, and displays the connecting portion 1b that supports the shock absorber D, the screw shaft 1c, the nut member 1d, and the rod 1e. Since the drawing is complicated, in FIG. 2, the illustration of each member of the connecting portion 1b, the screw shaft 1c, the nut member 1d, and the rod 1e is omitted, but these connecting portions 1b are also provided in the testing machine E2. The screw shaft 1c, the nut member 1d, and the rod 1e are provided.

  The shaft 21 is pivotally supported by a pair of support legs 26 fixed to the base 1a. The shaft 21 includes a pin provided with a first arm 22 and a second arm 23 at an intermediate portion of the lower node 2a. The third arm 24 is attached to a position that does not interfere with the lower node 2a.

  In the case of this embodiment, the first arm 22 and the second arm 23 can be brought into contact with the pin 27, and are brought into contact with the lower joint 2a via the pin 27. As described above, the collision with the lower joint 2a includes not only the direct collision but also the indirectly collision via the pin 26 or the like.

  The distal end of the third arm 24 is hinge-coupled to the distal end of the cylinder device 25 that exhibits expansion and contraction, and the proximal end of the cylinder device 25 is hinge-coupled to the base 1a. Although not described in detail, the cylinder device 25 includes a piston that is slidably inserted into the cylinder and divides the two chambers in the cylinder, a piston rod having one end connected to the piston, and each chamber. And a pump capable of supplying a working fluid to the cylinder chamber 25 to extend the cylinder device 25 by supplying the working fluid to one chamber and discharging the working fluid from the other chamber, and to the other chamber. The cylinder device 25 can be contracted by supplying fluid and discharging the working fluid from one of the chambers.

  When the cylinder device 25 is extended, the shaft 21 is driven to rotate counterclockwise in FIG. 2, and the first arm 22 is also rotated counterclockwise to collide with the lower node 2a via the pin 27. The tip of the lower joint 2a is rotated to the left in FIG. 2 until the stopper 2d is effective beyond the thought point, and the locked state in which the shock absorber D is prevented from contracting can be entered.

  On the contrary, when the cylinder device 25 is contracted, the shaft 21 is driven to rotate clockwise in FIG. 2, and the second arm 22 is also rotated clockwise to collide with the lower node 2a via the pin 27. The tip of the lower joint 2a can be rotated to the right in FIG. 2 until the thought point is exceeded, and the state can be shifted to the unlocked state in which the buffer D can be freely expanded and contracted.

  As described above, in the testing machine E2 according to another embodiment, the lock unit 2 can be locked and unlocked without manual operation, so that the sensory test of the shock absorber D is performed without placing a burden on the operator. be able to.

  In the above description, driving means including the third arm 24 and the cylinder device 25 is used to drive the shaft 21, but instead of the third arm 24 and the cylinder device 25, the shaft 21 is driven. A rotationally driven motor may be used as the driving means.

  In the test machines E1 and E2, the shock absorber D is attached to the test machines E1 and E2 in an upright posture with the cylinder 4 downward and the piston rod 5 upward. The shock absorber D may be attached to the machines E1 and E2 in an inverted posture with the cylinder 4 facing upward and the piston rod 5 facing downward.

  This is the end of the description of the embodiment of the present invention, but the scope of the present invention is of course not limited to the details shown or described.

It is a side view of the testing machine in one embodiment. It is a side view of the testing machine in other embodiments.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Support stand 1a Base 1b Connection part 1c Screw shaft 1d Nut member 1e Rod 2 Locking means 2a Lower node 2b Upper node 2c Gripping part 2d Stopper 3 Seat 3a Seat 3b Backrest 4 Cylinder 5 Piston rod 6 Spring support 7 Knuckle bracket 8 Angle adjusting member 8a Base 8b Oscillating unit 8c Oscillating unit main body 8d Long hole 9, 21 Shaft 10 Bar 11 Arm 12 Operating rod 13 Suspension spring 14 Bolt 20 Automation unit 22 First arm 23 Second arm 24 Third arm 25 Cylinder Device 26 Support leg 27 Pin D Shock absorber E1, E2 Testing machine

Claims (8)

A support base which is connected to the lower end of the damper is supported in an upright state the buffer, and locking means for enabling at least the above shock absorber contraction of blocking and the shock absorber expansion tolerance, the shock absorber A testing machine with a seat attached to the upper end. Said locking means includes a lower section that swings are connected to the lower end of the shock absorber, made of a crank mechanism which includes an upper section that swings are connected to the upper end of the shock absorber, said lower section and said upper according to claim 1, characterized in that when a and a node is rotated beyond the change point to one side consisting comprises a stopper for preventing rotation of the further one side of the lower section and the upper section testing machine. Machine according to claim 2 in which one of the upper nodes and the lower nodes characterized in that it is can be mounted in any position of the damper cylinder. The support base includes a base, a connecting portion that is swingably attached to the base and connected to a lower end of the shock absorber, a screw shaft that is rotatably attached to the base around an axis, and the screw. The test according to any one of claims 1 to 3, further comprising: a nut member screwed onto the shaft; and a rod that is swingably coupled to both the nut member and the connecting portion. Machine. The support base includes a base, a shaft that is rotatably attached to the base, a driving unit that rotationally drives the shaft, and an extension from the shaft to rotate the shaft in one direction so as to impinge on the lower node. The first arm that rotates the lower node to one side, and the second arm that extends from the shaft and rotates the shaft in the other direction collides with the lower node and rotates the lower node to the other side. The testing machine according to claim 1, further comprising two arms. 6. The testing machine according to claim 5, wherein the driving means is a third arm extending from the shaft, and a cylinder device interposed between the third arm and the base by being hinged . A connecting portion pivotably attached to the base and connected to a lower end of the shock absorber; a screw shaft rotatably attached to the base around an axis; and a nut member screwed onto the screw shaft; 7. The testing machine according to claim 5, further comprising a rod that is swingably coupled to both the nut member and the connecting portion. An angle adjusting member is interposed between the seat and the upper end of the shock absorber, and the angle adjusting member is swingable with respect to the base fixed to the upper end of the shock absorber and the base. The testing machine according to claim 1, further comprising a swinging portion fixed to the seat.

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