Hopkinson pressure bar absorption bar

Abstract

The utility model belongs to the technical field of absorption rods, and particularly relates to a Hopkinson pressure bar absorption rod which comprises a first rod used for being connected with a main rod of a Hopkinson pressure bar. The first bulge is fixed with the edge of the first rod; the second rod is used for being connected with the first rod, a circular groove is formed in the second rod, and a part of the first rod and the first protrusion are arranged in the circular groove. The spring in the pre-compression state is arranged in the circular groove of the second rod, so that the rigidity of the spring is increased, the energy absorption range is widened, meanwhile, certain thrust is applied to the first rod, and the energy absorption effect is improved. When the impact force is smaller than the thrust, the first rods are kept relatively static, when the impact force is larger than the thrust, the first rods extrude the elastic pieces, the elastic pieces reduce reflected waves by absorbing part of impact energy, and therefore the energy absorption efficiency is improved, and the shock wave absorption capacity of the absorption rods is improved.

Description

Technical Field

[0001] This utility model belongs to the field of absorption rod technology, and particularly relates to Hopkinson pressure rod absorption rod. Background Technology

[0002] In the Hopkinson bar system, the design of the absorber bar plays a crucial role, typically used to absorb impact forces, reduce specimen rebound, and transmit stress waves.

[0003] For example, Chinese patent CN207019993U discloses an automatic feeding device for Hopkinson pressure bars. The device has a simple structure, is easy to control, improves feeding efficiency, and reduces the labor intensity of experimental personnel.

[0004] When using the absorber rod of this patent, it is necessary to use an absorber to absorb the impact force. The absorber rod itself has limited ability to absorb impact force, which reduces the impact force absorption effect of the absorber rod. Utility Model Content

[0005] The purpose of this invention is to provide a Hopkinson's pressure bar absorber to solve the problems mentioned in the background art, including:

[0006] The first link is used to connect the main link of the Hopkinson pressure bar;

[0007] The first protrusion is fixed to the edge of the first rod;

[0008] The second rod is used to connect to the first rod. The second rod has a circular groove, and a portion of the first rod and the first protrusion are disposed in the circular groove.

[0009] The third protrusion is fixed to the edge of the circular groove, and the third protrusion, together with the first protrusion, can restrict the movement of the first rod inside the circular groove.

[0010] An elastic element is disposed in a circular groove and is in a pre-compressed state, which can apply a certain thrust to the first rod.

[0011] Preferably, the elastic element is a spring.

[0012] Preferably, the circular groove is provided with an adjustment component, which can compress the elastic element and increase the thrust on the first rod.

[0013] Preferably, the adjustment component includes:

[0014] A bidirectional lead screw, wherein the bidirectional lead screw is disposed in a circular groove, and the bidirectional lead screw passes through a second rod and is rotatably connected to the second rod;

[0015] A driving component, which is connected to a bidirectional lead screw and can drive the bidirectional lead screw to rotate;

[0016] Two sliders are threadedly connected to a bidirectional lead screw, and the two sliders are capable of sliding along a circular groove;

[0017] A disk, which is in contact with an elastic element;

[0018] Connecting seat, wherein the connecting seat and the disc are fixed together;

[0019] Two connecting rods, each with two ends, one end of each connecting rod being rotatably connected to two sliders respectively, and the other end of each connecting rod being rotatably connected to a connecting seat, with the two connecting rods forming a figure-eight shape.

[0020] Preferably, the driving component is a motor, the motor and the second rod are fixed together, and the output end of the motor is fixed together with the bidirectional lead screw.

[0021] Preferably, the driving component is a knob, and the knob is fixed to the bidirectional lead screw.

[0022] Preferably, the inner wall of the circular groove is provided with a plurality of grooves, a plurality of second protrusions are fixedly connected to the first protrusion, and a plurality of fourth protrusions are fixedly connected to the disc, and the plurality of second protrusions and the plurality of fourth protrusions are all disposed in the plurality of grooves.

[0023] This application increases the rigidity of the spring by setting a pre-compressed spring in the circular groove of the second rod, thereby increasing the energy absorption range. At the same time, a certain thrust is applied to the first rod. When the impact force is less than this thrust, the first rods remain relatively stationary. When the impact force is greater than this thrust, the first rod squeezes the elastic element. The elastic element reduces the reflected wave by absorbing part of the impact energy, thereby improving the energy absorption efficiency and thus improving the ability of the absorbing rod to absorb shock waves. Attached Figure Description

[0024] Figure 1 This is an axial view of the present invention;

[0025] Figure 2 This is a cross-sectional view of the present invention;

[0026] Figure 3 This is a partial cross-sectional view of the present invention;

[0027] Figure 4 This is a schematic diagram of the adjustment component structure of this utility model.

[0028] The markings in the diagram are as follows:

[0029] 100, First rod; 110, First protrusion; 120, Second protrusion; 200, Second rod; 210, Third protrusion; 300, Elastic element; 400, Adjustment component; 410, Bidirectional lead screw; 420, Drive element; 430, Slider; 440, Disc; 441, Fourth protrusion; 450, Connecting seat; 460, Connecting rod; 500, Groove. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0031] In the process of absorbing the impact force of the main rod of a Hopkinson pressure bar using an absorbing rod, the absorbing rod's effect on absorbing the impact force is usually limited, as shown in announcement number CN207019993U. An absorber is needed to further absorb the impact force from the absorbing rod, but relying on an external absorber increases the complexity of the device. After extensive research, improving the impact force absorption capacity of the absorbing rod itself is particularly important. To address the problem of poor impact force absorption by the absorbing rod itself, this embodiment provides a Hopkinson pressure bar absorbing rod, as shown... Figures 2-3 As shown, it includes: a first rod 100, a first protrusion 110, a second rod 200, a circular groove, a third protrusion 210, and an elastic element 300.

[0032] like Figure 1 As shown, the first rod 100 is a long rod-shaped structure. The first rod 100 is used to connect the main rod of the Hopkinson pressure bar. Welding or fastening is usually used to ensure the stability and reliability of the connection. The first rod 100 can transmit impact force.

[0033] like Figure 3 As shown, the first protrusion 110 is an annular structure. The first protrusion 110 is fixed to the edge of the first rod 100. The first protrusion 110 is set in the circular groove and cooperates with the third protrusion 210 to prevent the first rod 100 from detaching from the circular groove.

[0034] like Figure 2 As shown, the second rod 200 is a long rod and is used to connect the first rod 100. The second rod 200 has a circular groove. A portion of the first rod 100 and the first protrusion 110 are disposed in the circular groove and can move along the circular groove.

[0035] like Figure 3As shown, the third protrusion 210 is an annular structure. The third protrusion 210 is fixed to the edge of the circular groove. The third protrusion 210, together with the first protrusion 110, can restrict the movement of the first rod 100 inside the circular groove and prevent the first rod 100 from detaching from the second rod 200.

[0036] The elastic element 300 is preferably a spring. The elastic element 300 is disposed in a circular groove and is in a pre-compressed state, which can apply a certain thrust to the first rod 100. When the impact force is less than this thrust, the first rod 100 remains relatively stationary. When the impact force is greater than this thrust, the first rod 100 squeezes the elastic element 300. The elastic element 300 reduces the reflected wave by absorbing part of the impact energy, thereby improving the energy absorption efficiency and thus improving the ability of the absorbing rod to absorb shock waves.

[0037] To further improve the shock absorption capacity of the shock absorber, further solutions include, for example... Figure 3 As shown, an adjustment component 400 is provided inside the circular groove. This adjustment component 400 can compress the elastic element 300 and increase the thrust on the first rod 100. The adjustment component 400 is positioned in a direction away from the elastic element 300 and away from the first rod 100. Specifically, as shown... Figure 4 As shown, the adjustment assembly 400 includes: a bidirectional lead screw 410, a drive component 420, two sliders 430, a disc 440, a connecting seat 450, and two connecting rods 460.

[0038] The bidirectional lead screw 410 is a long rod with two threads of opposite directions on its surface. The bidirectional lead screw 410 is set in a circular groove. The bidirectional lead screw 410 passes through the second rod 200 and is rotatably connected to the second rod 200 through a bearing. When the bidirectional lead screw 410 rotates, it can drive the two sliders 430 to move away from or closer to each other.

[0039] The drive component 420 has two configurations. When the drive component 420 is a motor, the motor and the outer wall of the second rod 200 are fixed together, and the output end of the motor is fixed to the bidirectional lead screw 410. When the motor is started, the bidirectional lead screw 410 can be driven to rotate. This method can make the device more automated. When the drive component 420 is a knob, the knob and the bidirectional lead screw 410 are fixed together. When the machine is stopped, the knob is manually rotated to drive the bidirectional lead screw 410 to rotate. This method can make the device more energy-efficient.

[0040] The two sliders 430 are square in shape and are threadedly connected to the bidirectional lead screw 410. The two sliders 430 can slide along the circular groove. When the bidirectional lead screw 410 rotates, the two sliders 430 will slide closer or further away along the circular groove by means of the threaded connection with the bidirectional lead screw 410, thereby causing the two sliders 430 to move the two connecting rods 460.

[0041] The disc 440 is a circular plate structure. The disc 440 is in contact with the elastic element 300. The movement of the disc 440 compresses or releases the elastic element 300, thereby adjusting the stiffness of the spring and controlling the range of energy it absorbs. That is, a softer spring can absorb less impact energy, while a harder spring is more suitable for absorbing more impact energy.

[0042] The connecting seat 450 is composed of two hollow plates with several rotating holes on the surface of the plates. The two connecting rods 460 can be connected through the rotating shaft and the rotating holes to realize the rotatable connection between the connecting seat 450 and the two connecting rods 460. The connecting seat 450 and the disc 440 are fixed together.

[0043] The two connecting rods 460 are rectangular rod structures, each with two ends. One end of each connecting rod 460 is rotatably connected to two sliders 430 (each slider 430 has a hollow plate with a rotating hole; the connecting rods 460 and the sliders 430 are rotatably connected via a shaft and the rotating hole). The other end of each connecting rod 460 is rotatably connected to a connecting seat 450. The two connecting rods 460 are arranged in a V-shape. When the two sliders 430 move closer or further apart, the distance between one end of each connecting rod 460 changes. Since the length of each connecting rod 460 is fixed, when the distance at one end changes, the connecting rod 460 will sequentially push the connecting seat 450 and the disc 440 to move, thereby compressing or releasing the elastic element 300.

[0044] To further improve the impact absorption capacity of the device, further solutions include, for example... Figures 3-4 As shown, the inner wall of the circular groove is provided with a plurality of grooves 500. A plurality of second protrusions 120 are fixedly connected to the first protrusion 110, and a plurality of fourth protrusions 441 are fixedly connected to the disk 440. The plurality of second protrusions 120 and the plurality of fourth protrusions 441 are all arranged in the plurality of grooves 500, thereby increasing the energy dissipation of frictional contact between the first rod 100 and the second rod 200, which can effectively reduce the energy of vibration propagation and further improve the absorption efficiency.

[0045] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A Hopkinson pressure absorber, characterized in that, include: The first rod (100) is used to connect the main rod of the Hopkinson pressure bar, and the edge of the first rod is fixedly connected with a first protrusion (110); The second rod (200) is connected to the first rod (100). The second rod (200) has a circular groove, and the first protrusion (110) is disposed in the circular groove. The second rod (200) includes a third protrusion (210), which is fixed to the edge of the circular groove. The third protrusion (210) cooperates with the first protrusion (110) to restrict the movement of the first rod (100) inside the circular groove. The elastic element (300) is disposed in a circular groove and is in a pre-compressed state, which can apply a thrust to the first rod (100). When the impact force is less than this thrust, the first rod (100) and the second rod (200) remain relatively stationary. When the impact force is greater than this thrust, the first rod (100) squeezes the elastic element (300) to absorb the impact force.

2. The Hopkinson pressure bar absorber according to claim 1, characterized in that, The elastic element (300) is a spring.

3. The split Hopkinson pressure bar absorber rod of claim 1, wherein, An adjustment component (400) is provided inside the circular groove. The adjustment component (400) can compress the elastic element (300) and increase the thrust on the first rod (100).

4. The split Hopkinson pressure bar absorber rod of claim 3, wherein, The adjustment assembly (400) includes: A bidirectional lead screw (410) is provided in a circular groove, the bidirectional lead screw (410) passes through a second rod (200) and is rotatably connected to the second rod (200); A driving member (420) is connected to a bidirectional lead screw (410) and can drive the bidirectional lead screw (410) to rotate; Two sliders (430) are threadedly connected to a two-way lead screw (410), and the two sliders (430) are capable of sliding along a circular groove; The disk (440) is in contact with the elastic element (300); A connecting seat (450) is fixed to the disc (440); Two connecting rods (460) each have two ends. One end of each connecting rod (460) is rotatably connected to two sliders (430), and the other end of each connecting rod (460) is rotatably connected to a connecting seat (450). The two connecting rods (460) are arranged in a figure-eight shape.

5. The split-Hopkinson pressure bar absorber rod of claim 4, wherein, The driving component (420) is a motor, the motor is fixed to the second rod (200), and the output end of the motor is fixed to the bidirectional lead screw (410).

6. The Hopkinson pressure bar absorber according to claim 4, characterized in that, The driving component (420) is a knob, which is fixed to the bidirectional lead screw (410).

7. The split-Hopkinson pressure bar absorber rod of claim 4, wherein, The inner wall of the circular groove is provided with a plurality of grooves (500), a plurality of second protrusions (120) are fixedly connected to the first protrusion (110), and a plurality of fourth protrusions (441) are fixedly connected to the disc (440). The plurality of second protrusions (120) and the plurality of fourth protrusions (441) are all arranged in the plurality of grooves (500).

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