Full-automatic modal force hammer

Abstract

The utility model provides a full-automatic modal force hammer which comprises a supporting structure, a driving device, a force hammer, a force hammer driving lever and an elastic element, the supporting structure is provided with the driving device, the force hammer and the elastic element, the force hammer comprises a hammer rod and a hammer head, the hammer head is installed at the top end of the hammer rod through a force sensor, and the force hammer driving lever is installed on the driving device. The force hammer shifting rod is located below the hammer rod, the elastic element is connected with the hammer rod, the driving device is used for driving the force hammer shifting rod to move upwards or downwards, the force hammer shifting rod can drive the hammer rod to move upwards or downwards while moving upwards or downwards, and the force sensor is used for measuring and feeding back force value signals. The utility model has the beneficial effects that: 1, a complex angle adjusting mechanism is cancelled, the knocking position precision is ensured by fixing the mechanical bracket, and the mechanical interference is avoided; and 2, by simplifying the structural design and optimizing the control mode, the knocking force and the knocking position are automatically adjusted, and meanwhile, the equipment cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of modal testing technology, and in particular to a fully automatic modal force hammer. Background Technology

[0002] Modal hammers are commonly used excitation devices in modal testing to induce structural vibrations and obtain their dynamic characteristics. However, most existing fully automated modal hammers are complex in structure and expensive, limiting their application in small- to medium-scale testing.

[0003] Problems and defects of existing technologies: 1. Using a combination of servo motor, ball screw, and reducer to drive the hammer results in a complex structure and high cost (the multi-axis servo system alone has more than 20 components); 2. Integrating precision hydraulic devices or multi-joint robotic arms to adjust the striking angle and force results in a large size (e.g., industrial-grade equipment exceeds 50cm in size), unavoidable mechanical interference, and high cost; 3. Requires an external independent force sensor and data acquisition card, and the signal must be processed by third-party software before output, making the process cumbersome and costly.

[0004] Therefore, it is of great significance to develop a low-cost and reliable fully automatic modal force hammer. Summary of the Invention

[0005] To address the problems of complex structure, high cost, and large size of existing force hammers, this utility model provides a fully automatic modal force hammer, including a support structure, a drive device, a force hammer, a force hammer lever, and an elastic element. The support structure is equipped with the drive device, the force hammer, and the elastic element. The force hammer includes a hammer rod and a hammer head. The hammer head is mounted on the top of the hammer rod via a force sensor. The force hammer lever is mounted on the drive device and is located below the hammer rod. The elastic element is connected to the hammer rod. The drive device drives the force hammer lever to move upward or downward, and the upward or downward movement of the force hammer lever simultaneously drives the hammer rod to move upward or downward. The force sensor is used to measure and feedback force signals.

[0006] As a further improvement of this utility model, the support structure includes a hammer fixing structure, on which the hammer rod is installed. The hammer fixing structure is provided with a first sliding groove. One end of the hammer lever is installed on the driving device, and the other end of the hammer lever extends out from the first sliding groove, and the hammer lever can slide up and down in the first sliding groove.

[0007] As a further improvement of this utility model, the hammer fixing structure is also provided with a second sliding groove, the hammer rod is installed in the second sliding groove, and the hammer rod can slide up and down in the second sliding groove.

[0008] As a further improvement of this utility model, the fully automatic modal hammer also includes a bearing, a main shaft, and a bearing locking component. The hammer rod has a first through hole at its end, and the bearing is installed in the first through hole. One end of the main shaft is installed in the second slide groove, and the other end of the main shaft is connected to the hammer rod through the bearing. The hammer rod can rotate around the bearing axis. The bearing locking component is installed at the end of the main shaft and is close to the end face of the inner ring of the bearing. The bearing locking component is used to fix the position of the bearing and ensure that the hammer rod can rotate flexibly.

[0009] As a further improvement of this utility model, the fully automatic modal hammer also includes a counterweight block, which is installed on the hammer rod. Adjusting the position of the counterweight block on the hammer rod can change the striking force of the hammer.

[0010] As a further improvement of this utility model, the fully automatic modal hammer also includes a hammer lever fixing component, which is installed at the end of the drive device. One end of the hammer lever is installed on the hammer lever fixing component, and the other end of the hammer lever extends out from the first slide groove.

[0011] As a further improvement of this utility model, the driving device is a cylinder, and the fully automatic modal force hammer also includes a cylinder stroke stop block. The cylinder stroke stop block is installed on the support structure and is used to limit the movement stroke of the cylinder piston rod.

[0012] As a further improvement of this utility model, the fully automatic modal hammer also includes a plate connector and a cylinder fixing component. The cylinder is installed on one side of the cylinder fixing component, and the plate connector is installed on the other side of the cylinder fixing component.

[0013] As a further improvement of this utility model, the fully automatic modal force hammer also includes a controller, and the force sensor is connected to the controller via a wire.

[0014] As a further improvement of this utility model, the fully automatic modal force hammer also includes an inner shell and an outer shell. The inner shell is embedded inside the outer shell. The inner shell is equipped with a force measuring mechanism, a force adjusting mechanism, and a control mechanism. The outer shell serves as an external frame, fixing the support structure and cooperating with the inner shell to form an overall protection, while also providing an installation interface. The elastic element is a tension spring.

[0015] The beneficial effects of this utility model are: 1. It eliminates the complex angle adjustment mechanism and ensures the accuracy of the striking position by using a fixed mechanical support, avoiding mechanical interference; 2. By simplifying the structural design and optimizing the control method, it achieves automatic adjustment of striking force and striking position, while reducing equipment costs; 3. It adopts a simple mechanical structure of single cylinder + lever + bearing, reducing the number of parts by more than 50% and the cost by 60%; 4. It achieves automated operation through a controller, reducing human error and improving testing accuracy and efficiency. Attached Figure Description

[0016] Figure 1 This is an axial view of the fully automatic modal force hammer of this utility model;

[0017] Figure 2 This is an exploded view of the fully automatic modal force hammer of this utility model;

[0018] Figure 3 This is an overall structural diagram of the fully automatic modal force hammer of this utility model;

[0019] Figure 4 This is a right view of the fully automatic modal force hammer of this utility model;

[0020] Figure 5 This is a left view of the fully automatic modal force hammer of this utility model;

[0021] Figure 6 This is a side view of the fully automatic modal force hammer of this utility model;

[0022] Figure 7 This is a partial enlarged view of the fully automatic modal force hammer of this utility model;

[0023] Reference numerals: 1-Cylinder stroke stop, 2-Force hammer fixing structure, 3-Tension spring, 4-Hammer rod, 5-Counterweight, 6-Bearing, 7-Bearing locking component, 8-Force hammer lever, 9-Force sensor, 10-Hammer head, 11-Force hammer lever fixing component, 12-Cylinder, 13-Plate connector, 14-Cylinder fixing component, 15-First slide groove, 16-Second slide groove, 17-First through hole, 18-Main shaft, 19-Second through hole; Detailed Implementation

[0024] like Figure 1-7As shown, this utility model discloses a fully automatic modal force hammer, including a support structure, a drive device, a force hammer, and a controller. The drive device is installed on one side of the support structure, and the force hammer is installed on the other side. The drive device is a cylinder 12, and a force hammer lever 8 is installed on the top of the cylinder 12. A hammer rod 4 is installed on the other side of the support structure, located above the force hammer lever 8. A counterweight 5 is installed on the hammer rod 4. The hammer head 10 is installed on the top of the hammer rod 4 through a force sensor 9. That is, one end of the force sensor 9 is connected to the hammer rod 4, and the other end is fixed to the hammer head 10. The force sensor 9 is connected to the controller through a wire to transmit the force value signal in real time. The controller is connected to the cylinder 12, which drives the cylinder 12 to move upward or downward. A tension spring 8 is also installed on the support structure. The tension spring 8 is connected to the hammer rod 4. When the cylinder 12 extends upward, it drives the hammer lever 8 to push the hammer rod 4 upward. As the hammer rod 4 moves upward, it pushes the tension spring 8 to compress and store energy. Then the cylinder 12 quickly retracts, driving the hammer lever 8 to quickly reset. While the tension spring 8 releases the stored elastic potential energy, it pushes the hammer rod 4 downward, thus completing the striking action. The controller adjusts the output of the cylinder 12 in real time through the force value signal fed back by the force sensor 9 to ensure the stability and consistency of the striking force.

[0025] The support structure includes a hammer fixing structure 2 and a cylinder fixing structure 14 installed below the hammer fixing structure 2. A cylinder 12 is fixedly installed on one side of the cylinder fixing structure 14, and a hammer lever fixing structure 11 is installed at the end of the cylinder 12. The hammer fixing structure 2 is provided with a first sliding groove 15. One end of the hammer lever 8 is installed on the hammer lever fixing structure 11, and the other end of the hammer lever 8 extends out from the first sliding groove 15 and can slide up and down along the first sliding groove 15. The hammer fixing structure 2 is provided with a second sliding groove 16, and the hammer rod 4 is installed on the second sliding groove 16 and can slide up and down along the second sliding groove 16.

[0026] The fully automatic modal hammer includes a main shaft 18 and a bearing 6. The hammer rod 4 has a first through hole 17 at its end, and the bearing 6 is installed in the first through hole 17. One end of the main shaft 18 is installed on a second slide groove 16, and the main shaft 18 can slide up and down in the second slide groove 16. The other end of the main shaft 18 is connected to the hammer rod 4 through the bearing 6. The hammer rod 4 is supported by the bearing 6 and can rotate around the axis of the bearing 6. The bearing locking member 7 is installed at the end of the main shaft 18 and close to the end face of the inner ring of the bearing 6. The bearing locking member 7 is used to fix the position of the bearing 6 and ensure that the hammer rod 4 can rotate flexibly.

[0027] The hammer rod 4 is mounted on the hammer fixing structure 2 via bearings 6, ensuring axial transmission of force during impact. Multiple mounting holes are provided on one side of the hammer rod 4, and multiple second through holes 19 are provided on the side adjacent to the mounting holes. Corresponding mounting holes communicate with the second through holes 19. One end of the tension spring 8 is fixed to the hammer fixing structure 2 with screws, and the other end of the tension spring 8 extends into the mounting hole. The screws pass through the second through holes 19 communicating with the mounting holes, fixing the tension spring 8 to the hammer rod 4. By adjusting the position of the tension spring 8 on the hammer rod 4, the elastic potential energy during impact is changed, and fine adjustment of the force is achieved in conjunction with the counterweight 5. The counterweight 5 is fixed to the hammer rod 4 with screws. By adjusting the position of the counterweight 5 on the hammer rod 4, the impact force of the hammer is changed, thereby adjusting the impact kinetic energy.

[0028] The fully automatic modal force hammer also includes a cylinder stroke stop 1, which is located on the same side as the cylinder 12 and above the cylinder fixing member 14. The cylinder stroke stop 1 is used to limit the movement stroke of the cylinder piston rod.

[0029] The fully automatic modal force hammer also includes a plate connector 13, which is mounted on a cylinder fixing component 14. The fully automatic modal force hammer is fixed to an external device through the plate connector 13 to ensure a stable position during impact. Force is transmitted through potential energy conversion (such as the cylinder 12 driving the hammer rod 4 to lift and release).

[0030] This fully automatic modal hammer also includes an inner shell and an outer shell. The inner shell integrates core functional components, while the outer shell provides mechanical support and protection. Together, they constitute the physical carrier of the hammer, ensuring that all mechanisms work in concert, as detailed below:

[0031] The inner shell is embedded inside the outer shell and mainly houses the force measuring mechanism (force sensor 9, hammer head 10), the force adjusting mechanism (counterweight 5, tension spring 8), and the control mechanism (controller, drive device, wires), providing internal structural fixation and protection. The force measuring mechanism is used to measure the striking force in real time, the force adjusting mechanism is used to adjust the magnitude of the striking force, and the drive device drives the power hammer to perform the striking action under the command of the controller.

[0032] The outer shell serves as the external frame, providing a fixed support structure and working in conjunction with the inner shell to form overall protection, while also providing an installation interface.

[0033] Working principle: When struck, the hammer head 10 contacts the object being tested and generates an impact force. The force is transmitted to the force sensor 9 through the hammer rod 4. The force sensor 9 converts the mechanical signal into an electrical signal and outputs it directly to the controller or user without the need for an additional signal processing module.

[0034] Controller: Users can preset the force value according to the test requirements and achieve the matching of the target striking force by changing the position of the counterweight 5 and the tension spring 8.

[0035] The controller uses I / O to control the air output when the level is high and the air input when the level is low, thereby enabling the cylinder 12 to move the power hammer lever 8 up and down.

[0036] The controller has a built-in signal conditioning circuit that amplifies and filters the force sensor signal in real time, and outputs the raw data or the processed force curve through a standardized protocol, without the need for additional programming adaptation.

[0037] The controller uses existing technology, and its specific structure will not be described in detail here.

[0038] The operation process of the fully automatic modal force hammer of this utility model is as follows:

[0039] 1. According to the test requirements, the force hammer is driven by controlling the extension and retraction of cylinder 12;

[0040] 2. The force sensor signal is directly output to the user;

[0041] 3. Mechanical structure (hammer fixing component 2, cylinder fixing component 14, plate connecting component 13) fixes the position between the hammer and the object being measured. After determining the height, it converts potential energy into kinetic energy to ensure the stability and consistency of the striking force.

[0042] Test and verification

[0043] A: Verify the stability and repeatability of the device's striking force under different test conditions;

[0044] B: Compared with traditional hand-operated hammers and existing fully automatic hammers, this utility model has significant advantages in terms of cost and performance.

[0045] Advantages of this utility model:

[0046] 1. Hardware integration: The force sensor 9 is directly embedded between the hammer head 10 and the hammer rod 4, and is directly connected to the user equipment through a wired interface. The user can preset the force value according to the test requirements, and achieve the matching of the target striking force by changing the position of the counterweight 5 and the tension spring 8.

[0047] 2. Software closed loop: The controller has a built-in signal conditioning circuit that amplifies and filters the force sensor 9 signal in real time, and outputs the raw data or the processed force curve through a standardized protocol, without the need for additional programming adaptation.

[0048] 3. Simplify the testing process, lower the barrier to entry for users, and directly meet the need for simultaneous acquisition of force and vibration signals in modal analysis.

[0049] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A fully automated modal force hammer, characterized by: The device includes a support structure, a drive device, a hammer, a hammer lever (8), and an elastic element. The support structure is equipped with the drive device, the hammer, and the elastic element. The hammer includes a hammer rod (4) and a hammer head (10). The hammer head (10) is mounted on the top of the hammer rod (4) via a force sensor (9). The hammer lever (8) is mounted on the drive device and is located below the hammer rod (4). The elastic element is connected to the hammer rod (4). The drive device is used to drive the hammer lever (8) to move upward or downward. When the hammer lever (8) moves upward or downward, it will drive the hammer rod (4) to move upward or downward. The force sensor (9) is used to measure and feedback the force value signal.

2. The fully automated modal force hammer of claim 1, wherein: The support structure includes a hammer fixing structure (2), on which the hammer rod (4) is installed. The hammer fixing structure (2) is provided with a first sliding groove (15). One end of the hammer lever (8) is installed on the driving device, and the other end of the hammer lever (8) extends out from the first sliding groove (15). The hammer lever (8) can slide up and down in the first sliding groove (15).

3. The fully automated modal force hammer of claim 2, wherein: The hammer fixing structure (2) is also provided with a second sliding groove (16), the hammer rod (4) is installed in the second sliding groove (16), and the hammer rod (4) can slide up and down in the second sliding groove (16).

4. The full-automatic modal force hammer according to claim 3, characterized in that: The fully automatic modal hammer also includes a bearing (6), a main shaft (18), and a bearing locking member (7). The hammer rod (4) has a first through hole (17) at its end. The bearing (6) is installed in the first through hole (17). One end of the main shaft (18) is installed in the second slide groove (16). The other end of the main shaft (18) is connected to the hammer rod (4) through the bearing (6). The hammer rod (4) can rotate around the axis of the bearing (6). The bearing locking member (7) is installed at the end of the main shaft (18) and close to the end face of the inner ring of the bearing (6). The bearing locking member (7) is used to fix the position of the bearing (6) and ensure that the hammer rod (4) can rotate.

5. The fully automated modal force hammer of claim 1, wherein: The fully automatic modal hammer also includes a counterweight (5), which is installed on the hammer rod (4). Adjusting the position of the counterweight (5) on the hammer rod (4) can change the hammer's striking force.

6. The full automatic modal force hammer according to claim 3, characterized in that: The fully automatic modal hammer also includes a hammer lever fixing component (11), which is installed at the end of the drive device. One end of the hammer lever (8) is installed on the hammer lever fixing component (11), and the other end of the hammer lever (8) extends out from the first slide groove (15).

7. The fully automated modal force hammer of claim 1, wherein: The driving device is a cylinder (12). The fully automatic modal force hammer also includes a cylinder stroke stop (1). The cylinder stroke stop (1) is installed on the support structure and is used to limit the movement stroke of the cylinder piston rod.

8. The full-automatic modal force hammer according to claim 7, characterized in that: The fully automatic modal hammer also includes a plate connector (13) and a cylinder fixing component (14). The cylinder (12) is installed on one side of the cylinder fixing component (14), and the plate connector (13) is installed on the other side of the cylinder fixing component (14).

9. The fully automated modal force hammer of claim 1, wherein: The fully automatic modal hammer also includes a controller, and the force sensor (9) is connected to the controller via a wire.

10. The fully automated modal force hammer of claim 1, wherein: The fully automatic modal force hammer also includes an inner shell and an outer shell. The inner shell is embedded inside the outer shell. The inner shell is equipped with a force measuring mechanism, a force adjusting mechanism and a control mechanism. The outer shell serves as an external frame, fixing the support structure and cooperating with the inner shell to form an overall protection, while also providing an installation interface. The elastic element is a tension spring (8).

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