Free falling body release device

Abstract

The utility model relates to a free falling body releasing device, which belongs to the technical field of free falling bodies and comprises a three-legged base, a recycling bin and two supporting rods are fixed on the upper surface of the three-legged base, and the outer surfaces of the two supporting rods are connected with a movable plate in a sliding manner. According to the free falling body releasing device, when a to-be-tested plate needs to be installed, a first pull rod is pulled, a rotating ring is driven to rotate, a second rotating rod is driven to rotate together, a limiting plate can rotate with the first rotating rod as the circle center, long screws are driven to move, the long screws can move in the direction of the rotating ring, the to-be-tested plate is placed among the three long screws, the first pull rod is loosened, and the to-be-tested plate can be installed. When measurement is needed, the first pull rod is pulled leftwards, the long screw can be made to be away from the plate to be measured, the weight to be measured and the plate to be measured fall down under the action of gravity, and the acceleration of the free falling body can be conveniently measured.

Description

Technical Field

[0001] The utility model relates to the technical field of free fall objects, in particular to a free fall object releasing device. Background Art

[0002] Free fall refers to the movement of a conventional object with an initial velocity of zero under the action of gravity alone. It is also called free fall motion. Free fall motion is an idealized physical model. It is a uniformly accelerated motion with an initial velocity of 0. It can also be said that the movement of an object falling from relative rest under the action of gravity alone is called free fall motion. For example, it is a physical phenomenon that occurs when you hold an object in your hand and gently let go under ideal conditions without applying any external force.

[0003] When measuring heavy objects, the existing free fall release device has uneven distribution of the clamping arms of the heavy object release device, resulting in inconsistent pace, and cannot ensure the uniformity of force and position of the heavy object when clamped. In the relaxed state, there may be differences in the distance between the clamping arms. In the clamping state, the clamping force varies depending on the radius of the clamped object, which affects the experimental data. Therefore, a free fall release device is proposed to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a free-fall releasing device, which has the advantages of convenient fixing and the like, and solves the problem of inconvenient fixing of the prior free-fall releasing device.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a free fall release device, comprising a tripod base, a recovery bucket and two support rods are fixed on the upper surface of the tripod base, a moving plate is slidably connected to the outer surfaces of the two support rods, a fixing mechanism and an adjustment mechanism are arranged inside the moving plate, a plate to be tested is arranged on the fixing mechanism, a weight to be tested is fixed to the lower surface of the plate to be tested, a connecting block is slidably connected to the outer surfaces of the two support rods, an ultrasonic probe is fixed to the front of the connecting block, a top block is fixed to the upper surfaces of the two support rods, and a hook is inserted into the upper surface of the top block;

[0006] The fixing mechanism includes a circular hole opened on the upper surface of the movable plate, a swivel is rotatably connected inside the circular hole, the fixing mechanism also includes three first rotating rods rotatably connected to the upper surface of the movable plate through a bearing seat and a second pull rod fixed to the left side of the movable plate, a limiting plate is fixed to the outer surface of the first rotating rod, and three second rotating rods are rotatably connected to the upper surface of the swivel through the bearing seat, the fixing mechanism also includes a through hole opened on the front side of the movable plate, a first spring is fixed on the right side of the inner cavity of the through hole, a first pull rod is fixed on the front side of the swivel, and a long screw is connected to the internal thread of the limiting plate.

[0007] Furthermore, two sliding blocks are fixed on the outer surface of the rotating ring, a sliding groove connected to the circular hole is provided inside the movable plate, and the sliding blocks are slidably connected to the inside of the sliding groove.

[0008] Furthermore, the limit plate is rotatably connected to the outer surface of the second rotating rod through a bearing, the limit plate is arc-shaped, and the left side of the first spring is fixed to the right side of the first pull rod.

[0009] Furthermore, the outer surface of the long screw abuts against the outer surface of the plate to be measured, and the heavy object to be measured is located above the recovery bucket.

[0010] Furthermore, the adjustment mechanism includes two cavities opened inside the movable plate, a telescopic rod is fixed to the back of the inner cavity of the cavity, a second spring is sleeved on the outer surface of the telescopic rod, a moving block is fixed to the front of the telescopic rod, a clamping rod is fixed to the front of the moving block, a third pull rod is fixed to the upper surface of the moving block, and the adjustment mechanism also includes a plurality of clamping slots opened on the back of the support rod.

[0011] Furthermore, the clamping rod is slidably connected to the inside of the clamping slot, the back side of the second spring is fixed to the back side of the cavity, and the front side of the second spring is fixed to the back side of the moving block.

[0012] Furthermore, a square hole is provided on the upper surface of the movable plate, and the third pull rod is slidably connected to the inside of the square hole.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] 1. The free-fall release device uses a fixing mechanism. When the test plate needs to be installed, the first pull rod is pulled to drive the rotating ring to rotate, and the second rotating rod is driven to rotate together. The limit plate will rotate with the first rotating rod as the center of the circle, and drive the long screw to move. The long screw will move toward the direction of the rotating ring. The test plate is placed between the three long screws, and the first pull rod is released. The first pull rod is reset, driving the rotating ring to rotate, and driving the limit plate and the long screw to rotate together to clamp and fix the test plate. When measurement is required, the first pull rod is pulled to the left to move the long screw away from the test plate, so that the weight to be measured and the test plate fall under the action of gravity, which is convenient for measuring the free fall acceleration.

[0015] 2. The free fall release device can adjust the position of the movable plate by pulling the third pull rod through the adjustment mechanism, driving the movable block and the clamping rod to move together and squeeze the second spring, so that the clamping rod is away from the clamping slot. After adjustment, the third pull rod is released, the movable block is reset, and the clamping rod is clamped into the inside of the clamping slot, thereby fixing the movable plate to prevent the movable plate from loosening, thereby completing the adjustment of the movable plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a three-dimensional appearance diagram of the utility model;

[0017] Figure 2 It is a top view structural schematic diagram of the fixing mechanism of the utility model;

[0018] Figure 3 For this utility model Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0019] In the figure: 1 tripod base, 2 support rod, 3 recycling bucket, 4 moving plate, 5 fixing mechanism, 501 round hole, 502 swivel, 503 first rotating rod, 504 second rotating rod, 505 through hole, 506 first spring, 507 first pull rod, 508 second pull rod, 509 limit plate, 510 long screw, 6 adjustment mechanism, 601 cavity, 602 telescopic rod, 603 second spring, 604 moving block, 605 third pull rod, 606 clamping rod, 607 clamping slot, 7 plate to be measured, 8 weight to be measured, 9 connecting block, 10 ultrasonic probe, 11 top block, 12 hook. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1 A free fall release device in this embodiment includes a tripod base 1, a recycling bucket 3 and two support rods 2 are fixed on the upper surface of the tripod base 1, and a moving plate 4 is slidably connected to the outer surfaces of the two support rods 2. A fixing mechanism 5 and an adjusting mechanism 6 are arranged inside the moving plate 4. A test plate 7 is arranged on the fixing mechanism 5, and a weight 8 to be measured is fixed to the lower surface of the test plate 7. The test plate 7 and the weight 8 to be measured are clamped and fixed by the fixing mechanism 5, and the position of the moving plate 4 is adjusted by the adjusting mechanism 6. A connecting block 9 is slidably connected to the outer surfaces of the two support rods 2, and an ultrasonic probe 10 is fixed to the front of the connecting block 9. Through ultrasonic detection, a top block 11 is fixed to the upper surfaces of the two support rods 2, and a hook 12 is inserted on the upper surface of the top block 11. After the weight 8 to be measured is replaced with the hook 12, simple harmonic vibration can be measured. The weight 8 to be measured is located above the recycling bucket 3, and the interior of the recycling bucket 3 is filled with foam to prevent the weight 8 to be measured from rebounding after falling to the ground.

[0022] See also Figure 2In order to facilitate the test of gravity, the fixing mechanism 5 in this embodiment includes a circular hole 501 opened on the upper surface of the movable plate 4, and a swivel 502 is rotatably connected inside the circular hole 501. The fixing mechanism 5 also includes three first rotating rods 503 rotatably connected to the upper surface of the movable plate 4 through a bearing seat and a second pull rod 508 fixed to the left side of the movable plate 4. A limiting plate 509 is fixed to the outer surface of the first rotating rod 503, and the limiting plate 509 rotates around the first rotating rod 503. The upper surface of the swivel 502 is rotatably connected to three second rotating rods 504 through the bearing seat. The fixing mechanism 5 also includes a through hole 505 opened on the front of the movable plate 4, and a first spring 506 is fixed to the right side of the inner cavity of the through hole 505. A first pull rod 507 is fixed to the front of the swivel 502. The first pull rod 507 is reset by the first spring 506. The internal thread of the limiting plate 509 is connected with a long screw 510 for limiting.

[0023] Two sliders are fixed on the outer surface of the rotating ring 502 , and a slide groove connected to the circular hole 501 is provided inside the movable plate 4 , and the sliders are slidably connected to the inside of the slide groove to increase the stability of the rotating ring 502 during rotation.

[0024] In addition, the limit plate 509 is rotatably connected to the outer surface of the second rotating rod 504 through a bearing, so that the limit plate 509 can rotate with the first rotating rod 503 as the center, and the rotating ring 502 can be driven to rotate through the second rotating rod 504. The limit plate 509 is arc-shaped, and the left side of the first spring 506 is fixed to the right side of the first pull rod 507. The first pull rod 507 is reset by the first spring 506. The outer surface of the long screw 510 abuts against the outer surface of the board to be tested 7. The surface of the long screw 510 is knurled to increase the surface friction. The long screw 510 abuts against the board to be tested 7 to limit the board to be tested 7.

[0025] The fixing mechanism 5 in this embodiment, when it is necessary to install the test plate 7, pull the first pull rod 507 to drive the rotating ring 502 to rotate, and drive the second rotating rod 504 to rotate together, the limit plate 509 will rotate with the first rotating rod 503 as the center of the circle, and drive the long screw 510 to move, the long screw 510 will move toward the rotating ring 502, and the test plate 7 will be placed between the three long screws 510, loosen the first pull rod 507, the first pull rod 507 is reset, and drives the rotating ring 502 to rotate, and drives the limit plate 509 and the long screw 510 to rotate together, clamping and fixing the test plate 7, when measurement is required, pull the first pull rod 507 to the left, the long screw 510 can be moved away from the test plate 7, so that the test weight 8 and the test plate 7 fall under the action of gravity, which is convenient for measuring the free fall acceleration.

[0026] See also Figure 3In order to facilitate the adjustment of the position of the movable plate 4, the adjustment mechanism 6 in this embodiment includes two cavities 601 opened inside the movable plate 4, a telescopic rod 602 is fixed to the back of the inner cavity of the cavity 601, and a second spring 603 is sleeved on the outer surface of the telescopic rod 602. The second spring 603 is made to perform linear compression movement through the telescopic rod 602, a moving block 604 is fixed to the front of the telescopic rod 602, and the moving block 604 is made to perform linear movement through the telescopic rod 602, a clamping rod 606 is fixed to the front of the moving block 604, and a third pull rod 605 is fixed to the upper surface of the moving block 604 for pulling the moving block 604 to move, and the adjustment mechanism 6 also includes a plurality of clamping slots 607 opened on the back of the support rod 2.

[0027] Among them, the locking rod 606 is slidably connected to the inside of the locking slot 607, and is used to limit the movable plate 4 and the support rod 2 to prevent the movable plate 4 from moving. The back side of the second spring 603 is fixed to the back side of the inner cavity of the cavity 601, and the front side of the second spring 603 is fixed to the back side of the movable block 604. The movable block 604 is reset by the second spring 603, driving the locking rod 606 to be locked into the inside of the locking slot 607 to limit the movable plate 4.

[0028] A square hole is formed on the upper surface of the movable plate 4 , and the third pull rod 605 is slidably connected to the inside of the square hole.

[0029] The adjustment mechanism 6 in this embodiment pulls the third pull rod 605, drives the moving block 604 and the locking rod 606 to move together and squeeze the second spring 603, so that the locking rod 606 is away from the locking groove 607, and the position of the moving plate 4 can be adjusted. After adjustment, the third pull rod 605 is released, the moving block 604 is reset, and the locking rod 606 is locked into the inside of the locking groove 607, thereby fixing the moving plate 4 to prevent the moving plate 4 from loosening.

[0030] The working principle of the above embodiment is:

[0031] (1) When the test board 7 needs to be installed, the first pull rod 507 is pulled in the direction of the second pull rod 508. The first pull rod 507 drives the rotating ring 502 to rotate in the circular hole 501 and drives the slider to slide inside the slide slot, thereby increasing the stability of the rotating ring 502 during rotation. The rotating ring 502 rotates and drives the second rotating rod 504 to rotate together. The limiting plate 509 rotates with the first rotating rod 503 as the center of the circle and drives the long screw 510 to move. The long screw 510 moves toward the rotating ring 502. When the plate to be tested 7 is placed between the three long screws 510, the first pull rod 507 is loosened, and the first pull rod 507 is reset under the action of the first spring 506, driving the swivel 502 to rotate, and driving the limit plate 509 to rotate, driving the long screw 510 to move, and clamping the plate to be tested 7. When measurement is required, the first pull rod 507 is pulled to the left, so that the long screw 510 is moved away from the plate to be tested 7, so that the weight 8 to be tested and the plate to be tested 7 fall under the action of gravity, which is convenient for measuring the free fall acceleration.

[0032] (2) When the position of the movable plate 4 needs to be adjusted, the third pull rod 605 is pulled, and the third pull rod 605 drives the movable block 604 to move in the cavity 601 and squeeze the second spring 603 and the telescopic rod 602. The movable block 604 drives the clamping rod 606 to move together, so that the clamping rod 606 is away from the clamping slot 607, and the position of the movable plate 4 can be adjusted. After the adjustment is completed, the third pull rod 605 is released, and the movable block 604 is reset under the action of the second spring 603, driving the clamping rod 606 to move together, so that the clamping rod 606 is clamped into the inside of the clamping slot 607, fixing the movable plate 4 to prevent the movable plate 4 from loosening.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A free fall release device, comprising a tripod base (1), characterized in that: A recycling bucket (3) and two support rods (2) are fixed on the upper surface of the tripod base (1); a movable plate (4) is slidably connected to the outer surfaces of the two support rods (2); a fixing mechanism (5) and an adjustment mechanism (6) are provided inside the movable plate (4); a plate to be tested (7) is provided on the fixing mechanism (5); a weight to be tested (8) is fixed on the lower surface of the plate to be tested (7); a connecting block (9) is slidably connected to the outer surfaces of the two support rods (2); an ultrasonic probe (10) is fixed on the front of the connecting block (9); a top block (11) is fixed to the upper surfaces of the two support rods (2); a hook (12) is plugged into the upper surface of the top block (11); The fixing mechanism (5) includes a circular hole (501) formed on the upper surface of the movable plate (4), a rotating ring (502) being rotatably connected inside the circular hole (501), the fixing mechanism (5) also includes three first rotating rods (503) being rotatably connected to the upper surface of the movable plate (4) via a bearing seat, and a second pull rod (508) fixed to the left side of the movable plate (4), a limiting plate (509) being fixed to the outer surface of the first rotating rod (503), and three second rotating rods (504) being rotatably connected to the upper surface of the rotating ring (502) via a bearing seat, the fixing mechanism (5) also includes a through hole (505) formed on the front surface of the movable plate (4), a first spring (506) being fixed to the right side of the inner cavity of the through hole (505), a first pull rod (507) being fixed to the front of the rotating ring (502), and a long screw (510) being threadedly connected to the inner surface of the limiting plate (509).

2. A free fall release device according to claim 1, characterized in that: Two sliding blocks are fixed on the outer surface of the rotating ring (502), and a sliding groove connected to the circular hole (501) is provided inside the movable plate (4), and the sliding blocks are slidably connected to the inside of the sliding groove.

3. A free fall release device according to claim 1, characterized in that: The limit plate (509) is rotatably connected to the outer surface of the second rotating rod (504) via a bearing, the limit plate (509) is arc-shaped, and the left side of the first spring (506) is fixed to the right side of the first pull rod (507).

4. A free fall release device according to claim 1, characterized in that: The outer surface of the long screw (510) abuts against the outer surface of the plate to be measured (7), and the weight to be measured (8) is located above the recovery bucket (3).

5. A free fall release device according to claim 1, characterized in that: The adjustment mechanism (6) comprises two cavities (601) opened inside the movable plate (4); a telescopic rod (602) is fixed to the back of the inner cavity of the cavity (601); a second spring (603) is sleeved on the outer surface of the telescopic rod (602); a movable block (604) is fixed to the front of the telescopic rod (602); a clamping rod (606) is fixed to the front of the movable block (604); a third pull rod (605) is fixed to the upper surface of the movable block (604); and the adjustment mechanism (6) further comprises a plurality of clamping grooves (607) opened on the back of the support rod (2).

6. A free fall release device according to claim 5, characterized in that: The clamping rod (606) is slidably connected to the inside of the clamping slot (607), the back side of the second spring (603) is fixed to the back side of the inner cavity of the cavity (601), and the front side of the second spring (603) is fixed to the back side of the moving block (604).

7. A free fall release device according to claim 5, characterized in that: A square hole is provided on the upper surface of the movable plate (4), and the third pull rod (605) is slidably connected to the inside of the square hole.

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