JP5122510B2 - Drop test device - Google Patents

Description

  The present invention relates to a drop test apparatus, and more particularly to an improvement of a drop test apparatus that performs a drop test of a vehicle such as a motorcycle or an automobile.

  A vehicle such as a motorcycle or an automobile may be subjected to a drop durability test in which the vehicle is repeatedly dropped from a high place such as 1.5 m or 10 m depending on the purpose of use, and durability is tested.

  And as this kind of drop test device, the thing of various structures can be illustrated, for example, what is shown in patent documents 1 can be illustrated as an endurance test device of a motorcycle.

  This test apparatus includes a front wheel holding means for holding the front wheel in a grounded state, and the rear part of the vehicle body is lifted until the rear wheel reaches an arbitrarily set height position, and the rear part of the vehicle body is moved from the lifted position with a substantially free fall speed. An adjustable vehicle body lifting and dropping means for dropping and an adjustable throttle valve opening / closing operation means for rotating the rear wheel until an arbitrary set speed is reached in the lifted state are provided.

  Therefore, according to this test apparatus, the lifting height of the rear wheel is set so as to generate a twisting torque equal to the twisting torque applied to the final shaft, and at the same time, the vehicle body is dropped while rotating the rear wheel at the set speed. This enables simulation close to the actual starting method in which the main stand is set up and the engine is started to make a sudden start, and the endurance test can be performed by automatically applying a uniform load to the final shaft.

  However, this test apparatus does not perform the durability test by dropping the vehicle body itself. Examples of the apparatus for dropping the vehicle body itself include those shown in Patent Document 2.

  The test apparatus includes a mechanism for holding the test sample at an arbitrary height, a mechanism for releasing the test sample and dropping the test sample, and dropping the test sample together with the test sample at the top of the test sample. A posture control member that holds the posture of the sample falling constant, a mechanism that holds the posture control member, and a mechanism that separates the posture control member from the test sample and stops before the test sample collides with the floor surface. A drop impact test is performed by causing the test sample to collide with the floor surface.

  Therefore, this test apparatus drops the printed wiring board or portable device on which the semiconductor device is mounted, and evaluates the reliability of the solder connection part and the adhesion part. It can be applied to a vehicle drop impact test apparatus such as an automobile.

  According to this test apparatus, the test sample falls at the same time as the posture control member, so that the posture of the test sample can be kept stable until just before colliding with the floor surface, thereby reducing the variation in test results. There is.

Japanese Patent Laid-Open No. 3-21440 (See Claims, FIG. 1) JP 2002-318181 A (refer to paragraph 0038, FIG. 1, FIG. 3 and FIG. 4 in the specification)

  However, in the test apparatus configured as described above, since the posture control member is dropped simultaneously with the test sample, a mechanism for reliably separating only the posture control member before the test sample collides with the floor surface is required. .

  Specifically, a stopper is provided above the floor material of the column, and only the attitude control member collides with the stopper, so an extra mechanism is required and the apparatus becomes complicated and large. As a result, it leads to cost increase.

  In addition, since the posture control member stops when it directly collides with and is caught by the stopper, the posture control is performed every time a drop test is performed if the stopper does not have any shock absorbing structure. A large impact is directly applied to the member.

  Therefore, when repeatedly performing such a drop test repeatedly, there is a risk of damage to the attitude control member due to the impact described above and a significant decrease in durability.In addition, both the attitude control member and the test sample are Since it is necessary to suspend and integrate at an arbitrary height each time, it is not only troublesome for the operator, but also requires a long work time for preparation, resulting in poor test efficiency.

  This invention was created in view of the above circumstances, and its purpose is that there is no risk of damage to the device itself or deterioration in durability when performing drop tests repeatedly and continuously. Of course, it is an object of the present invention to provide a drop test apparatus which can be easily lifted in a short time, improves test efficiency, and is optimal for expecting improvement in versatility.

  In order to achieve the above-described object, the configuration of the drop test apparatus according to the present invention basically includes a base with a landing surface, a base frame and a guide rail standing from the base, and an upper part of the base frame. The holding member is provided with a first guide sheave that guides the lifting wire that is lifted by the lifting member, and the guide rail is connected to the connecting member to which the tip of the lifting wire is fixed. A drop member that can be connected to the member and dropped together with the test object suspended on the lower surface when the connection is released is mounted so that it can move up and down, while the test object collides with the ground during the drop test. In some cases, a receiving member for receiving only the dropping member is provided so that the falling member does not collide with the DUT. The dropping member and the receiving member are provided with the receiving member. Receiving and a drop-side shock absorbing member and receiving side impact damper to relieve impact when the composed respectively.

  Therefore, according to the present invention, during the drop test, the impact that occurs when the dropping member is received by the receiving member, the dropping side impact reducing member provided on the receiving member, and the dropping side provided on the dropping member itself Since it can be mitigated by the impact mitigating member, the falling member is prevented from being damaged in advance, and the durability is remarkably improved.

  In addition, since the DUT is dropped by releasing the connection between the connecting member and the dropping member, the lifting wire is lowered when the DUT is dropped, and the connecting member fixed to the tip is connected to the dropping member. The dropping member and the DUT are lifted upward together with the connecting member by the operation of the lifting member.

  Therefore, if the drop test apparatus of the present invention is used, there is no risk of damage to the apparatus itself or a decrease in durability, as well as a drop test with good test efficiency by shortening the preparation time for lifting the DUT. .

It is a partially broken front view of the drop durability test device by one embodiment of this invention. It is a front view which expands and shows the principal part of the connection member in FIG. 1, and a dropping member. In FIG. 1, it is a partially broken top view which shows the attachment structure of a connection member and a guide rail. Similarly in FIG. 1, it is a partially broken plan view showing the attachment structure of the dropping member and the guide rail. In FIG. 1, it is a partially broken front view which expands and shows a receiving member. In FIG. 5, it is a partially broken front view which shows the state which received the dropping member with the receiving member. In FIG. 1, it is a partially broken top view which expands and shows a receiving member and a guide rail.

  The present invention will be described below on the basis of the illustrated embodiment. The illustrated embodiment is a drop durability test apparatus for performing a drop durability test of a vehicle such as an automobile to be tested. It becomes.

  That is, as shown in FIG. 1, the illustrated drop durability test apparatus 1 is provided on a base 3 provided with a landing surface 2, a base frame and a guide rail 8 standing from the base 3, and an upper part of the base frame. And a holding member.

  The holding member is provided with a first guide sheave 6 for guiding the lifting wire 5 that is lifted by the lifting member, the connecting rail 12 having the tip of the lifting wire 5 fixed to the guide rail 8, and the connecting member. 12 is attached so that it can be moved up and down together with the vehicle 7 as a test object suspended from the lower surface when the connection is released.

  On the other hand, the base 3 is provided with a receiving member 40 for receiving only the dropping member 15 so that the dropping member 15 does not collide with the vehicle 7 when the vehicle 7 collides with the landing surface in the drop test.

  The dropping member 15 and the receiving member 40 are each provided with a dropping-side impact reducing member and a receiving-side impact reducing member that reduce the impact when the receiving member 40 receives the dropping member 15.

  In more detail below, the base frame is composed of four support columns 4 (see FIG. 1) erected from the four corners of the base 3, and a pair of left and right guide rails 8 are provided inside the support columns 4. While being erected, the holding member is provided inside the upper surface of the support column 4.

  This holding member includes an upper frame 11a and a lower frame 11b, and a connecting frame 11c that connects both the frames 11a and 11b, and the base frame that is the left end of the upper frame 11a in FIG. The take-up motor 14 is placed.

  A wire drum (not shown) is connected to the take-up motor 14, and the lifting wire 5 is wound around the wire drum. The lifting wire 5 includes two independent wires (not shown). 5 and the distal end portion is fixed to the connecting member 12 via the first guide sheave 6 provided at the distal end portion which is the right end portion in the drawing of the upper frame 11a.

  As shown in FIGS. 1 and 2, the connecting member 12 includes a cylindrical electromagnet 12a provided at the center, a connecting frame 12b extending left and right from the electromagnet 12a, and tips of the connecting frames 12b. And a connection-side guide member 25 attached to.

  The electromagnet 12a is magnetized by energizing a coil (not shown), attracts and connects the dropping member 15, and releases the connection by stopping the energization.

  Further, as shown in FIG. 2, a fixing tool 12c for fixing the lifting wire 5 is provided at the center of the upper surface of the electromagnet 12a, and a power source for the electromagnet 12a is provided on the side of the fixing tool 12c. A power cable 12d (only part of which is shown) is connected.

  As shown in FIG. 3, the connecting-side guide member 25 includes a main body portion 27 formed by projecting a left arm portion 27a, a right arm portion 27b, and a lower arm portion 27c in the vertical direction, and the left and right arm portions 27a, 27b and the lower arm 27c are configured by left, right, and lower rollers 29a, 29b, and 29c fixed by a nut 28 so as to be rotatable. The left and right and lower rollers 29a, 29b, and 29c guide the above-described guide. By holding the rail portion 8 a extending from the rail 8, the connecting member 12 moves up and down without coming off the guide rail 8.

  As shown in FIG. 2, the dropping member 15 includes an upper overlapping plate spring 15a formed by stacking four leaf springs having different lengths, and a lower side formed by stacking four leaf springs having different lengths. The overlapping plate springs 15b are arranged up and down, and fixed at the center by a connector 16, and drop side guide members 17 are attached to both ends of the upper overlapping plate spring 15a and the lower overlapping plate spring 15b.

  The connector 16 includes an upper support plate 16b that is in contact with the lower surface of the upper overlapping plate spring 15a via a urethane rubber sheet 16a as a buffer material, and an urethane rubber that is also used as a buffer material on the upper surface of the lower stacked plate spring 15b. It consists of a lower support plate 16c that abuts via a manufactured sheet 16a, and a connecting plate 16d that connects these upper and lower support plates 16b and 16c.

  The upper support plate 16b and the upper overlap plate spring 15a are fixed by bolts 18 and nuts 19, and the lower support plate 16c and the lower overlap plate spring 15b are fixed by U-shaped bolts 20 and nuts 19. Fixed.

  Further, a suction plate 22 in the form of a metal disk is fixed to the upper surface of the upper overlapping plate spring 15a via a urethane rubber sheet 21 via the bolt 18 and the nut 19, and the suction plate 22 is fixed to the upper plate spring 15a. By being attracted to the electromagnet 12a of the connecting member 12, the connecting member 12 and the dropping member 15 are connected.

  A base end of a predetermined length of the connecting wire 23 is fixed to the U-shaped bolt 20 that fixes the lower support plate 16c and the lower overlap plate spring 15b. The vehicle 7 is suspended and fixed.

  The connecting wire 23 is formed of a light and strong material such as nylon, and is set to a length that only the vehicle 7 collides with the landing surface 2 when the receiving member 40 is received by the receiving member 40 during the drop test. The

  Note that the fixing structure between the U-shaped bolt 20 and the base end of the connecting wire 23 and the fixing structure between the tip end of the connecting wire 23 and the vehicle 7 are not described in detail in the illustrated embodiment. Can be adopted.

  As shown in FIG. 4, the drop-side guide member 17 includes a main body portion 17d formed by projecting a left arm portion 17a, a right arm portion 17b, and a lower arm portion 17c in the vertical direction, and the left and right arm portions 17a, 17b and the lower arm portion 17c. The left, right and lower rollers 31a, 31b, and 31c are rotatably fixed to the lower arm portion 17c by the nut 28. By sandwiching the rail portion 8 a extending from 8, the dropping member 15 moves up and down without coming off the guide rail 8.

  Further, a pair of left and right connecting pieces 32 project from the inner side (showing the lower side in FIG. 4) of the main body portion 17d, and the upper overlapping plate spring 15a and the lower overlapping plate spring are provided between the connecting pieces 32. The tips of 15b are pivotally connected by connecting pins (only one is shown in FIG. 4).

  The upper overlap leaf spring 15 a and the lower overlap leaf spring 15 b have a parallel link structure with respect to the drop-side guide member 17, thereby dropping the vehicle 7 straight along the guide rail 8.

  Therefore, when the dropping member 15 dropped together with the vehicle 7 during the drop test collides with the receiving member 40, the upper overlap leaf spring 15a and the lower overlap leaf spring 15b are elastically deformed, and at the same time, due to friction between the leaf springs. A damping force is generated to reduce the impact, thereby preventing the falling member 15 itself from being damaged and improving the durability.

  As shown in FIGS. 5 and 6, the receiving member 40 is provided on the base 3 adjacent to the guide rail 8 and includes a buffer 41 e that directly contacts the dropping member 15. And a height adjusting portion 42 material placed on the base 3, and a hydraulic shock absorber 43 as a receiving side impact mitigating member provided between the receiving portion 41 and the height adjusting member 42. .

  As shown in FIG. 7, the receiving portion 41 includes a pair of right-side clamping pieces 41a for clamping two hydraulic shock absorbers 43 by bolts 41c at the upper portion thereof, and two hydraulic shock absorbers 43 at the upper portion thereof. And a pair of left side clamping pieces 41b clamped by bolting 41c, a connection piece 41d connecting the right side and left side clamping pieces 41a, 41b, and the right side and left side clamping pieces 41a, 41b are fixed to the upper surface and And a cover body 41f provided with the cushioning body 41e made of urethane rubber which directly contacts the dropping member 15.

  Further, the cover body 41f and the buffer body 41e are formed with a cut portion 41g into which the rail portion 8a is inserted with a gap on the guide rail 8 side, and when the receiving member 40 moves downward, Together with the right and left clamping pieces 41a and 41b, the receiving member 40 is prevented from coming off the guide rail 8.

  The height adjusting member 42 is formed by stacking a plurality of block pieces 42a, and the vertical position for receiving the dropping member 15 can be adjusted by increasing or decreasing the number of the block pieces 42a.

  A mounting portion 42b is integrally formed on the uppermost block piece 42a, and a lower portion of the hydraulic shock absorber 43 is fixed to the mounting portion 42b by a pin (not shown).

  Therefore, when the dropping member 15 collides with the receiving member 40, as shown in FIG. 6, the urethane rubber shock absorber 41e of the receiving portion 41 is elastically deformed, and at the same time, the four hydraulic shock absorbers 43 are contracted. Thus, a damping force is generated to reduce the impact, thereby preventing the falling member 15 from being damaged and improving the durability.

  The operation of the drop durability test apparatus 1 configured as described above will be described. First, the vehicle 7 that performs the drop durability test is placed on the landing surface 2, the dropping member 15 is lowered, and the base end is the above-described stopper. The tip of the connecting wire 23 fixed to the square bolt 20 is fixed to the vehicle 7.

  Thereafter, the winding motor 14 is actuated to lower the lifting wire 5, and the electromagnet 12a of the connecting member 12 fixed to the tip thereof is brought into contact with the suction plate 22 of the dropping member 15, and a control device (not shown). By turning on the magnetization signal, the electromagnet 12a is energized and magnetized, and the attracting plate 22 is attracted to connect the connecting member 12 and the dropping member 15.

  Next, when the winding motor 14 is actuated to wind the lifting wire 5, the vehicle 7 suspended from the dropping member 15 is lifted together with the connecting member 12 to a predetermined lifting position, that is, a drop test starting position. As shown in FIG. 1, preparation for a drop test is made.

  In this state, in order to perform a drop test, the magnetization signal is turned off by the control device, the energization to the electromagnet 12a is stopped, and the connection is released.

  Then, since the connection between the connecting member 12 and the dropping member 15 is released, the vehicle 7 starts free fall, and the dropping member 15 falling together with the vehicle 7 descends along the guide rail 8. .

  When the vehicle 7 collides with the landing surface 2, the dropping member 15 that has descended along with the vehicle 7 along the guide rail 8 has a buffer 41 e provided on the receiving portion 41 of the receiving member 40. Collide with.

  At this time, as shown in FIG. 6, the dropping member 15 generates a damping force by friction between the leaf springs at the same time as the upper and lower leaf springs 15a and 15b are elastically deformed downward. The impact is alleviated to prevent the falling member 15 from being damaged and to improve the durability.

  At the same time, in the receiving member 40, the shock absorber 41e of the receiving portion 41 is elastically deformed, and at the same time, the four hydraulic shock absorbers 43 are contracted to generate a damping force to reduce the impact. In combination with the impact mitigating action of the falling member 15, damage to the falling member 15 can be prevented and durability can be improved.

  In this state, when the vehicle 7 collides with the landing surface 2, the dropping member 15 is received by the receiving member 40, and even if the upper and lower overlapping leaf springs 15 a and 15 b are elastically deformed, the above vehicle Since the length of the connecting wire 23 and the height of the height adjusting member 42 are adjusted so as not to collide with the vehicle 7, the vehicle 7 is not affected at all.

  Thereafter, the winding motor 14 is actuated to lower the lifting wire 5 again, and the electromagnet 12a of the connecting member 12 fixed to the tip thereof is brought into contact with the suction plate 22 of the dropping member 15 and a control (not shown). By turning on the magnetization signal by the apparatus, the electromagnet 12 a is energized and magnetized, and the coupling plate 12 and the dropping member 15 are coupled by attracting the adsorption plate 22.

  In this state, when the winding motor 14 is operated to wind the lifting wire 5, the vehicle 7 is lifted to a predetermined lifting position, that is, a drop durability test start position. By turning OFF the second drop durability test can be started immediately.

  As described above in detail, according to the drop durability test apparatus 1 of the present invention, an impact generated when the dropping member 15 is received by the receiving member 40 during the drop durability test is provided on the receiving member 40. Since it can be mitigated by the drop-side impact mitigating member and the drop-side impact mitigating member provided on the dropping member 15 itself, the dropping member 15 can be prevented from being damaged and the durability can be remarkably improved.

  In addition, since the dropping member 15 that is dropped together with the vehicle is connected to the connecting member 12 by using the electromagnet 12a, the electromagnet 12a can be energized and turned off by turning on and off the magnetization signal of the control device. The non-energization can be easily controlled. For this reason, the connecting operation of the connecting member 12 and the dropping member 15 can be easily performed in a short time.

  Therefore, when performing the drop durability test repeatedly and continuously, the preparation work for lifting as shown in the conventional example can be performed in a short time, so the preparation time can be reduced and the test efficiency can be reduced. Raised.

  In addition, since the winding motor 14 is placed on the upper support column side of the upper frame 11a and the first guide sheave 6 is provided on the upper tip side of the upper frame 11a, the parts related to the winding device are gathered in one compact place. Can be placed.

  In addition, since two independent wires are used as the lifting wire 5, even if one lifting wire 5 is cut, the connecting member 12 does not suddenly fall and the safety is high.

  Since the drop-side guide member 17 and the connection-side guide member 25 have the same structure, the number of parts can be reduced and the cost can be reduced. Therefore, it can be moved up and down stably without detaching from the guide rail 8.

  In the illustrated embodiment, the electromagnet 12a is used for connecting or releasing the connecting member 12 and the dropping member 15. However, the electromagnet 12a is not limited to this structure. A structure may be used.

  Further, although the upper overlap leaf spring 15a and the lower overlap leaf spring plate 15b used for the dropping member 15 are formed by overlapping four leaf springs having different lengths, the number of leaf springs reduces the magnitude of impact. It can be changed arbitrarily according to.

  The four hydraulic shock absorbers 43 used for the receiving member 40 can also be changed to one to three or any number of four or more according to the magnitude of the impact to be mitigated.

  It is suitable for use in a drop durability test device that performs a drop durability test on vehicles such as automobiles.

DESCRIPTION OF SYMBOLS 1 Drop endurance test apparatus 2 Landing surface 3 Base 4 Support | pillar which comprises wooden frame 5 Lifting wire 6 1st guide sheave 7 Vehicle which is a to-be-tested body 8 Guide rail 11a Upper frame which comprises a holding member 11b Lower frame which constitutes a holding member 11c Connecting frame constituting holding member 12 Connecting member 12a Electromagnet 14 Winding motor as lifting member 15 Dropping member 15a Upper overlapping plate spring 15b Lower overlapping plate spring 17 Dropping side guide member 22 Adsorption plate 23 Connecting wire 40 Receiving member 41 Receiving Part 41e shock absorber 42 height adjustment member 43 hydraulic shock absorber

Claims (7)

  A base having a landing surface, a base frame and a guide rail standing from the base, and a holding member provided on an upper portion of the base frame, the holding member guides a lifting wire lifted by a lifting member. A guide sheave is provided, and the guide rail includes a connecting member in which the tip of the lifting wire is fixed, and a dropping member that can be connected to the connecting member and drops together with the test object that is suspended from the lower surface when the connection is released. At the same time, the base is provided with a receiving member for receiving only the falling member so that the falling member does not collide with the DUT when the DUT collides with the ground during the drop test. The dropping member and the receiving member include a dropping-side impact reducing member and a receiving-side impact reducing member that reduce the impact when the receiving member receives the dropping member. Drop test device being characterized in that respectively.   The holding member includes an upper frame and a lower frame, and a connecting frame that connects both the frames. A winding motor as the lifting member is placed on the upper base end side of the upper frame. 2. The drop according to claim 1, wherein a tip of the lifting wire wound around a wire drum of a motor is fixed to the connecting member via the first guide sheave provided on an upper tip side of the upper frame. Test equipment.   The drop test device according to claim 2, wherein the lifting wire wound around the wire drum is composed of two independent wires, and each is fixed to the connecting member.   The drop test apparatus according to claim 1, wherein the connecting member includes an electromagnet in the center, and performs connection and disconnection with the dropping member depending on presence or absence of an attractive force of the electromagnet.   The drop test apparatus according to claim 1, wherein the dropping member includes a connecting wire having a predetermined length on a lower surface thereof, and the test object is suspended through the connecting wire.   The above-mentioned connection provided on the upper surface of the upper-side plate spring, and the above-mentioned drop-side impact relaxation member in which the above-mentioned fall member is a pair of upper and lower upper plate springs and lower-layer plate springs connected by a central connector. 2. The suction plate for connecting to a member, and a drop-side guide member that is fixed to both ends of the upper and lower overlap leaf springs and that can be moved up and down along the guide rail. Drop test equipment.   The receiving member is provided between a receiving portion having a buffer body that directly contacts the dropping member, a height adjusting member placed on a base, and the receiving portion and the height adjusting member. The drop test apparatus according to claim 1, further comprising a hydraulic shock absorber as a receiving side impact reducing member.

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