CN209992325U

CN209992325U - Modal force hammer device

Info

Publication number: CN209992325U
Application number: CN201920651264.1U
Authority: CN
Inventors: 沈高飞; 潘栋材; 潘东君
Original assignee: Shanghai Wenbei Measurement And Control Technology Co Ltd
Current assignee: Shanghai Wenbei Measurement And Control Technology Co Ltd
Priority date: 2019-05-08
Filing date: 2019-05-08
Publication date: 2020-01-24
Anticipated expiration: 2029-05-08

Abstract

The utility model discloses a modal power hammer device relates to the mechanics field, including power hammer main part and shell, the surface of power hammer main part is provided with the shell, one side of shell is provided with the switching mouth, and the inside rear end of shell sets up the force sensing receiver, one side of force sensing receiver is connected with the collision spring, the upper end of collision spring is provided with the hooked rod, the scale pointer is installed to torsion spring's upper end, the upper end of scale pointer is provided with the transmission button, and the lower extreme of scale pointer is provided with the calibrated scale, the firing pin is installed to one side middle-end of collision spring, the outside of firing pin is provided with the accelerometer, one side of accelerometer is provided with the force sensing connector. The dynamics that the calibrated scale selection was launched for hammering dynamics at every turn obtains guaranteeing, and the attenuator reduces the tup and makes a round trip to stretch out and draw back and cause secondary hammering, makes the factor that influences dynamics and secondary hammering in the modal test obtain controlling.

Description

Modal force hammer device

Technical Field

The utility model relates to a mechanics field specifically is a modal power hammer device.

Background

The modal force hammer is an important tool for solving the problems of structural dynamics and mechanical vibration, carrying out resonance detection, test design, modal test and the like; the method is widely applied to the fields of aviation, aerospace, ships, weapons, nuclear industry, petrochemistry, water power, electric power, light industry, traffic, vehicles, scientific research and the like.

However, the current modal force hammer has the size of the hammering strength that can not be accurately controlled, needs long-term test operation and experienced researcher operation, and the artifical hammering can not reduce the secondary hammering that produces in the hammering process to many times are tested and are made contrast, and everyone's hammering strength at every turn also can not be guaranteed, and acceleration to the experiment when not surveying the acceleration device and can not confirming the power hammer of waving influences, makes whole experiment have a lot of uncertain factors. Accordingly, one skilled in the art provides a modal force hammer apparatus to solve the problems set forth in the background above.

Disclosure of Invention

An object of the utility model is to provide a modal power hammer device to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a modal force hammer device comprises a force hammer main body and a shell, wherein the outer surface of the force hammer main body is provided with the shell, one side face of the shell is provided with a switching port, the rear end inside the shell is provided with a force sensing receiver, one end of the force sensing receiver is connected with a collision spring, one end of the collision spring is connected with a hook rod, the other end of the hook rod is connected with a torsion spring, the upper end of the shell is provided with a dial, the upper surface of the dial is provided with a scale pointer, a transmitting button is arranged at one side position, close to the scale pointer, of the upper surface of the dial, a striker is arranged at the lower end position of the hook rod, the side face of the collision spring is provided with a striker, an accelerometer is sleeved at the outer side of the striker, one end of the accelerometer is provided with a force sensing connector, the other end of the force sensing connector is provided with a, and a striker is arranged at one side position of one end of the force sensor, which is close to the damper, and the other side surface of the force sensor is connected with a hammer.

As a further aspect of the present invention: the damper is characterized in that a piston rod is arranged at one end of the damper, a piston is arranged on one side of the piston rod, an oil hole is formed in the middle of the piston, a tail sealing piece is arranged on one side of the piston, and an oil cavity is formed among the piston rod, the piston and the tail sealing piece.

As a further aspect of the present invention: the damper is a component in an overall closed state, the piston is made of rubber, the piston rod is made of rigid material, and damping oil is filled in the oil cavity.

As a further aspect of the present invention: the force sensing connector is connected with the force sensor through a spring, the impact rod is made of rigid materials, and the impact rod and the damper are on the same horizontal plane.

As a further aspect of the present invention: the torsion spring is elastically connected with the hook rod, the emission button is elastically connected with the torsion spring, and the hook rod is a rod-shaped component with one end provided with a latch.

As a further aspect of the present invention: the force sensor is electrically connected with the force sensing connector, the adapter is electrically connected with the accelerometer, and the force sensing connector is a hollow cylindrical component.

Compared with the prior art, the beneficial effects of the utility model are that:

1. be different from traditional artifical hammering, set up power hammer and force transducer as an organic whole for the structure is simpler, and the operation is easy to the forefront, has avoided traditional step with various instrument interconnect.

2. Launch away the power hammer through launching, can select the dynamics of launching through the calibrated scale to adapt to different modal analysis objects, also avoided the great error that brings of dynamics difference that traditional manual work beaten at every turn, the calibrated scale of taking the scale can restrict the biggest hammering dynamics well, avoids too big power, may produce certain damage or deformation to the small-size structure of centering, thereby influences the test result.

3. The damper plays a role in buffering the hammer head in order to eject the hammer head out, so that secondary hammering caused by reciprocating expansion of the hammer head is reduced, and the result of modal analysis is influenced.

4. The accelerometer is used for measuring the acceleration generated by the ejection device to compare with a final modal analysis chart, and the influence of the acceleration on a final result is observed, so that the test result is more authoritative.

Drawings

FIG. 1 is a schematic diagram of a modal force hammer apparatus;

FIG. 2 is a schematic diagram of the dial of a modal force hammer apparatus;

FIG. 3 is a schematic diagram of a damper in a modal force hammer apparatus;

fig. 4 is a schematic diagram showing the installation position of a damper in a modal force hammer apparatus.

In the figure: 1. a force hammer body; 2. a force sensing receiver; 3. a collision spring; 4. a launch button; 5. a force sensing connector; 6. a force sensor; 7. a hammer head; 8. a striker; 9. an accelerometer; 10. a dial scale; 11. a transfer port; 12. a damper; 13. a housing; 1001. a scale pointer; 401. a hook rod; 402. a torsion spring; 601. a ram; 1201. a piston; 1202. sealing the tail part; 1203. a piston rod; 1204. an oil chamber; 1205. and an oil hole.

Detailed Description

Referring to fig. 1 to 4, in an embodiment of the present invention, a modal force hammer apparatus includes a force hammer main body 1 and a housing 13, the housing 13 is disposed on an outer surface of the force hammer main body 1, an adapter 11 is disposed on a side surface of the housing 13, a force sensor receiver 2 is disposed at a rear end inside the housing 13, a collision spring 3 is connected to one end of the force sensor receiver 2, a hook rod 401 is connected to one end of the collision spring 3, a torsion spring 402 is connected to the other end of the hook rod 401, a dial 10 is disposed at an upper end of the housing 13, a scale pointer 1001 is disposed on an upper surface of the dial 10, a launch button 4 is mounted on a side surface of the dial 10 close to the scale pointer 1001, a striker 8 is mounted on a side surface of the collision spring 3 at a lower end position of the hook rod 401, an accelerometer 9 is sleeved on an outer side of the striker 8, the other end of the force sensing connector 5 is provided with a force sensor 6, a damper 12 is arranged between the force sensor 6 and the force sensing connector 5, a striker 601 is arranged at one side position of one end of the force sensor 6 close to the damper 12, and the other side surface of the force sensor 6 is connected with a hammer 7.

One end of the damper 12 is provided with a piston rod 1203, one side of the piston rod 1203 is provided with a piston 1201, the middle of the piston 1201 is provided with an oil hole 1205, one side of the piston 1201 is provided with a tail sealing sheet 1202, an oil cavity 1204 is arranged between the piston rod 1203 and the piston 1201 and between the piston 1201 and the tail sealing sheet 1202, the maximum range of the dial 10 is 10Kg, the ejection force can be controlled, the hammering force at each time is kept consistent, and the experimental result is more accurate.

The damper 12 is a member in an integrally sealed state, the piston 1201 is made of rubber, the piston rod 1203 is made of rigid material, damping oil is filled in the oil chamber 1204, the force sensing connector 5 and the force sensor 6 are connected by a spring, the striker 601 is made of rigid material, the striker 601 and the damper 12 are on the same horizontal plane, the torsion spring 402 is elastically connected with the hook rod 401, the emission button 4 is elastically connected with the torsion spring 402, the hook rod 401 is a rod-shaped member with a latch at one end, the force sensor 6 is electrically connected with the force sensing connector 5, the adapter 11 is electrically connected with the accelerometer 9, and the force sensing connector 5 is a hollow cylindrical component, the damping device can reduce the swinging of the ejected hammer head, the possibility of secondary hammering is reduced, the acceleration of the ejected hammer head 7 can be measured by the accelerometer 9, and the influence of the acceleration on the mode data is detected, so that the test result is rigorous.

The utility model discloses a theory of operation is: firstly, determining the impact force applied by an object to be subjected to modal analysis, pulling a scale pointer 1001 to a force position marked on a dial 10, hooking a hook rod 401 on a collision spring 3, determining a hammering point, pressing a transmitting button 4, pushing a striker 8 by the collision spring 3 to push the striker 7 out to collide with the object to be detected, transmitting the generated impact force to a force sensing connector 5 through a force sensor 6, transmitting the impact force to a force sensing receiver 2, transmitting the impact force to a computer through a transfer port 11 to form a modal diagram, recording the acceleration generated in the process through an accelerometer 9, transmitting the acceleration to the computer, generating impact between the striker 601 and a damper 12 when the striker 7 and the object generate first impact, driving a piston 1201 to move through a piston rod 1203, enabling damping oil filled in an oil cavity 1204 to flow through an oil hole 1205 to buffer and unload the impact force, the hammer 7 stops moving, and the spring is arranged between the force sensor 6 and the force sensing connector 5, so that the popped hammer 7 and the popped force sensor 6 can be withdrawn through the recovery capacity of the spring, the possibility of secondary hammering of an object is reduced, and the experimental result is more accurate and precise.

The above-mentioned, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The modal force hammer device comprises a force hammer main body (1) and a shell (13), and is characterized in that the outer surface of the force hammer main body (1) is provided with the shell (13), a side face of the shell (13) is provided with a switching port (11), the rear end of the interior of the shell (13) is provided with a force sensing receiver (2), one end of the force sensing receiver (2) is connected with a collision spring (3), one end of the collision spring (3) is connected with a hook rod (401), the other end of the hook rod (401) is connected with a torsion spring (402), the upper end of the shell (13) is provided with a dial (10), the upper surface of the dial (10) is provided with a scale pointer (1001), a launch button (4) is installed at one side position, close to the scale pointer (1001), of the upper surface of the dial (10), the side face of the collision spring (3) is located at the lower end position of the hook rod (401) and is, accelerometer (9) has been cup jointed in the outside of striker (8), the one end of accelerometer (9) sets up force sensing connector (5), the other end of force sensing connector (5) sets up force sensor (6), be provided with attenuator (12) between force sensor (6) and force sensing connector (5), and one side position department that the one end of force sensor (6) is close to attenuator (12) is provided with striker (601), the another side of force sensor (6) is connected with tup (7).

2. A modal force hammer device according to claim 1, wherein a piston rod (1203) is disposed at one end of the damper (12), a piston (1201) is disposed at one side of the piston rod (1203), an oil hole (1205) is disposed at the middle portion of the piston (1201), a tail seal (1202) is disposed at one side of the piston (1201), and an oil chamber (1204) is disposed between the piston rod (1203) and the piston (1201) and the tail seal (1202).

3. A modal force hammer assembly as set forth in claim 2 wherein the damper (12) is a unitary closed member, the piston (1201) is made of rubber, the piston rod (1203) is made of rigid material, and the oil chamber (1204) is filled with damping oil.

4. A modal force hammer apparatus according to claim 1, wherein the force sensing connector (5) is spring-coupled to the force sensor (6), the striker (601) is rigid, and the striker (601) and the damper (12) are at the same level.

5. A modal force hammer assembly as claimed in claim 1, wherein the torsion spring (402) is resiliently coupled to a hook bar (401), the firing button (4) is resiliently coupled to the torsion spring (402), and the hook bar (401) is a rod-shaped member having a latch at one end.

6. A modal force hammer apparatus according to claim 1, wherein the force sensor (6) is electrically connected to the force sensing connector (5), the adaptor (11) is electrically connected to the accelerometer (9), and the force sensing connector (5) is a hollow cylindrical member.