Swing rod rammer

Abstract

The utility model relates to the technical field of inspection and detection, and discloses a swing rod rammer which comprises a swing rod, a rammer body, a balancing weight and a fastening pressing block, the rammer body is arranged at one end of the swing rod in a sleeved mode, the fastening pressing block is arranged outside the rammer body and connected with the swing rod in a fastening mode, rammer threaded rods are arranged on the two sides of the rammer body, and the balancing weight is arranged on the rammer threaded rods. The balancing weight is arranged on the ram threaded rod in a sleeving mode, and the threaded rod on the outer side of the balancing weight is fastened through a fastening nut. The balancing weights are arranged on the two sides of the ram body, the mass of the ram can be flexibly increased or decreased according to the requirement, the flat potential hole is formed in the ram body, the ram can move on the swing rod, and therefore the height of the ram can be adjusted, constant impact contact time can be kept under the condition that impact energy changes, and the quality of detection data is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of inspection and testing technology, specifically to a pendulum hammer. Background Technology

[0002] In the field of inspection and testing, many products need to undergo impact or collision tests to verify the reliability of their shells or key components. Impact devices are important testing devices that use a pendulum hammer structure. By adjusting the pendulum amplitude or the hammer mass, the required impact energy is generated through free fall or acceleration devices.

[0003] Traditional impact devices typically use pendulum hammers made of metal cylinders or spheres with a fixed mass. This results in limited flexibility in increasing or decreasing the mass, and the volume changes significantly depending on the required impact energy. This leads to variations in the transmission time of the impact force within the material, affecting the waveform of the impact energy and reducing the quality of the test data. Utility Model Content

[0004] The technical problem this invention aims to solve is that existing pendulum hammers exhibit significant volume changes depending on the required impact energy, leading to variations in the internal impact force transmission time of the material, affecting the waveform of the impact energy, and reducing the quality of the detection data.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is to provide a pendulum hammer, including a pendulum, a hammer body, a counterweight, and a fastening block. The hammer body is sleeved on one end of the pendulum, and the fastening block is disposed outside the hammer body and fastened to the pendulum. The hammer body is provided with hammer threaded rods on both sides, and the counterweight is sleeved on the hammer threaded rods. The threaded rods on the outside of the counterweight are fastened by fastening nuts.

[0006] Optionally, one end of the swing arm is a threaded swing arm with a flattened edge. The hammer body has a flattened edge hole at its center. The threaded swing arm can be inserted into the flattened edge hole, and the hammer body can slide along the threaded swing arm.

[0007] Optionally, the hammer body also includes an impact sphere, and the flat hole and the hammer threaded rod are both provided on the impact sphere. The flat hole penetrates the impact sphere and is perpendicular to the hammer threaded rods on both sides of the hammer body.

[0008] Optionally, two fastening blocks are provided, respectively located on the impact spherical surfaces at both ends of the flat hole. Each fastening block includes an inner spherical surface, an outer step, and an internal thread. The inner spherical surface fits into the impact spherical surface. The outer step is located on the side opposite to the inner spherical surface. The internal thread is located at the center of the fastening block and extends through the outer step and the inner spherical surface at both ends. The internal thread is threadedly connected to the rocker arm threaded rod.

[0009] Optionally, the outer dimensions of the fastening block are smaller than the impact spherical dimensions of the hammer body.

[0010] Optionally, the other end of the swing arm is provided with an external impact device connection structure.

[0011] In summary, this utility model provides counterweights on both sides of the hammer body, allowing for flexible adjustment of the hammer mass as needed. Furthermore, a flat hole is provided on the hammer body, enabling the hammer to move along the pendulum, thus adjusting the pendulum height and maintaining a constant impact contact time under varying impact energy conditions, thereby ensuring the quality of the test data. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the pendulum hammer of this utility model;

[0013] Figure 2 This is a schematic diagram of the overall assembly structure of the pendulum hammer of this utility model;

[0014] Figure 3 This is a schematic diagram of the pendulum structure of the pendulum hammer of this utility model;

[0015] Figure 4 This is a schematic diagram of the hammer body structure of the pendulum hammer of this utility model;

[0016] Figure 5 This is a schematic diagram of the pendulum hammer fastening block of this utility model;

[0017] Figure 6 This is a schematic diagram comparing the pendulum hammer of this utility model with a traditional hammer;

[0018] Figure 7 This is a schematic diagram comparing the impact force waveforms of the pendulum hammer of this utility model with those of a traditional hammer;

[0019] In the diagram: 1. Pendulum rod; 1-1. Threaded rod of pendulum rod; 1-2. Flat section; 1-3. External impact device connection structure; 2. Hammer body; 2-1. Threaded rod of hammer; 2-2. Impact spherical surface; 2-3. Flat section hole; 3. Fastening nut; 4. Counterweight; 5. Fastening pressure block; 5-1. Inner spherical surface; 5-2. Outer step; 5-3. Internal thread. Detailed Implementation

[0020] The following combination Figure 1-7 The present invention will be described in further detail below.

[0021] This utility model discloses a pendulum hammer, referring to... Figure 1 and Figure 2It includes a swing arm 1, a hammer body 2, a counterweight 4, and a fastening block 5. The hammer body 2 is sleeved on one end of the swing arm 1. The fastening block 5 is located outside the hammer body 2 and is fastened to the swing arm 1. The hammer body 2 has hammer threaded rods 2-1 on both sides. The counterweight 4 is sleeved on the hammer threaded rods 2-1. The threaded rods 2-1 on the outside of the counterweight 4 are fastened by fastening nuts 3.

[0022] In a further implementation, refer to Figure 3 One end of the swing arm 1 is a swing arm threaded rod 1-1, and the swing arm threaded rod 1-1 is provided with a flat 1-2. The hammer body 2 is provided with a flat hole 2-3 at the center. The swing arm threaded rod 1-1 of the swing arm 1 can be inserted into the flat hole 2-3, and the hammer body 2 can slide along the swing arm threaded rod 1-1. The other end of the swing arm 1 is provided with an external impact device connection structure 1-3.

[0023] In a further implementation, refer to Figure 4 and Figure 5 The hammer body 2 also includes an impact spherical surface 2-2, a flat hole 2-3, and a hammer threaded rod 2-1, all located on the impact spherical surface 2-2. The flat hole 2-3 penetrates the impact spherical surface 2-2 and is perpendicular to the hammer threaded rods 2-1 on both sides of the hammer body 2. The hammer body 2 is entirely hardened, achieving an overall hardness of HRC55-60. Two fastening blocks 5 are provided, located on the impact spherical surfaces 2-2 at both ends of the flat hole 2-3. The fastening blocks 5 include an inner spherical surface 5-1 and an outer platform. The outer step 5-2 and the inner thread 5-3 are located on the side opposite to the inner spherical surface 5-1, which is used to cooperate with the wrench for easy tightening. The inner thread 5-3 is located at the center of the fastening block 5, and both ends pass through the outer step 5-2 and the inner spherical surface 5-1. The inner thread 5-3 is threadedly connected to the threaded rod 1-1 of the swing arm. The outer dimensions of the fastening block 5 are smaller than the size of the impact spherical surface 2-2 of the hammer body 2 to avoid the fastening block 5 contacting the test piece during impact.

[0024] In use, this invention involves first screwing a fastening block 5 onto the threaded rod 1-1 of the swing arm 1, then inserting the hammer body 2 through the flat hole 2-2 into the threaded rod 1-1 of the swing arm 1, and then screwing another fastening block 5 onto the swing arm 1. The height of the hammer body 2 is then controlled according to the requirements of the test piece, and the fastening blocks 5 on both sides are tightened to fix the hammer body 2. Counterweights 4 are then installed on the threaded rods 2-1 on both sides of the hammer body 2 and secured with fastening nuts 3. After completion, the external impact device connection structure 1-3 of the swing arm 1 is connected to the external impact device. A suitable swing height is selected based on the rotation center of the external impact device, and the swing arm hammer is released to achieve the predetermined impact energy target.

[0025] The counterweight 4 has two configuration options: a fixed size, where its external dimensions are smaller than the impact spherical surface 2-2 of the hammer body 2, and the number can be increased or decreased as needed to achieve the required mass; and an incremental mass configuration, where the size and mass increase sequentially, and the desired mass can be selected accordingly. Figure 6 As shown, this method is suitable for when the size of the test piece is small, and the counterweight 4 will not collide with the test piece.

[0026] like Figure 6 and Figure 7 As shown, the overall size of this utility model is smaller than that of a traditional hammer, making it convenient to use. During the hammer impact test, the process of generating stress waves is related to the shape and length of the hammer itself. The longer the hammer, the longer the time it takes for the complete impact force to be transmitted. When different impact forces are required, the dimensions of a traditional hammer will also change accordingly, resulting in inconsistencies in the stress transmission time during the impact process, which affects the test data.

[0027] The impact hammer structure involved in this utility model includes an impact hammer body and a counterweight. The counterweight adjusts the impact hammer mass, while the impact body is always spherical in size. On the one hand, its spherical surface ensures the consistency of the impact center, and on the other hand, it ensures that the stress time is consistent each time, reducing the error in conclusions caused by different stress transmission times in subsequent test data analysis.

[0028] Appendix Figure 7 The stress waveforms generated after impact testing with two hammers of the same mass show that the square of the waveform integral area is proportional to the magnitude of the impact energy. Verification showed that the waveform integral areas were identical in both tests, and the waveform time of the spherical hammer was 15% shorter than that of the traditional cylindrical hammer. Furthermore, the structure of the counterweight, flattened weight, and fastening block facilitates adjustment of height and mass to obtain the required impact energy.

[0029] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A pendulum hammer, characterized in that, The device includes a swing arm (1), a hammer body (2), a counterweight (4), and a fastening block (5). The hammer body (2) is sleeved on one end of the swing arm (1). The fastening block (5) is located outside the hammer body (2) and is fastened to the swing arm (1). The hammer body (2) has hammer threaded rods (2-1) on both sides. The counterweight (4) is sleeved on the hammer threaded rods (2-1). The threaded rods (2-1) on the outside of the counterweight (4) are fastened by fastening nuts (3).

2. The pendulum hammer according to claim 1, characterized in that, One end of the swing rod (1) is a swing rod threaded rod (1-1), and the swing rod threaded rod (1-1) is provided with a flat hole (1-2). The hammer body (2) is provided with a flat hole (2-3) at the center. The swing rod threaded rod (1-1) of the swing rod (1) can be inserted into the flat hole (2-3), and the hammer body (2) can slide along the swing rod threaded rod (1-1).

3. The pendulum hammer according to claim 2, characterized in that, The hammer body (2) also includes an impact sphere (2-2). The flat hole (2-3) and the hammer threaded rod (2-1) are both provided on the impact sphere (2-2). The flat hole (2-3) penetrates the impact sphere (2-2) and is perpendicular to the hammer threaded rods (2-1) on both sides of the hammer body (2).

4. The pendulum hammer according to claim 3, characterized in that, Two fastening blocks (5) are provided, respectively located on the impact spherical surfaces (2-2) at both ends of the flat hole (2-3). The fastening block (5) includes an inner spherical surface (5-1), an outer step (5-2), and an internal thread (5-3). The inner spherical surface (5-1) fits against the impact spherical surface (2-2). The outer step (5-2) is located on the side opposite to the inner spherical surface (5-1). The internal thread (5-3) is located at the center of the fastening block (5) and its two ends penetrate the outer step (5-2) and the inner spherical surface (5-1). The internal thread (5-3) is threadedly connected to the rocker arm threaded rod (1-1).

5. The pendulum hammer according to claim 4, characterized in that, The external dimensions of the fastening block (5) are smaller than the dimensions of the impact spherical surface (2-2) of the hammer body (2).

6. The pendulum hammer according to claim 2, characterized in that, The other end of the swing arm (1) is provided with an external impact device connection structure (1-3).

Images