CN212410010U - Electrodynamic hammer - Google Patents
Electrodynamic hammer Download PDFInfo
- Publication number
- CN212410010U CN212410010U CN202021441596.6U CN202021441596U CN212410010U CN 212410010 U CN212410010 U CN 212410010U CN 202021441596 U CN202021441596 U CN 202021441596U CN 212410010 U CN212410010 U CN 212410010U
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- Prior art keywords
- hammer
- electromagnet
- hammer head
- automatic reset
- force sensor
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- 230000005520 electrodynamics Effects 0.000 title claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000010949 copper Substances 0.000 claims abstract description 5
- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229920001875 Ebonite Polymers 0.000 claims description 3
- 230000002146 bilateral effect Effects 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract 1
- 238000010009 beating Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 238000013480 data collection Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses an electrodynamic force hammer, its characterized in that includes: the automatic reset electromagnet (2) comprises an iron core vertically arranged at the center of the supporting frame and a copper coil which forms a reset spring structure outside the iron core; the fixing device (3) is connected with two sides of the supporting frame of the automatic reset electromagnet (2) and is used for suspending and supporting the automatic reset electromagnet (2) on the structure to be tested; the hammer head (5) is arranged at the lower end of the iron core of the automatic reset electromagnet (2); and the force sensor (4) is arranged at the lower end of the hammer head (5), and is in contact with the structure to be detected and used for detecting the striking force of the hammer head when the automatic reset electromagnet (2) works. The method can effectively solve the problem of poor reliability of modal data caused by narrow and small test occasions which are inconvenient to manually knock, overcomes the defects of inconsistent knocking points and inconsistent knocking directions of manual knocking, and obtains more accurate modal data.
Description
Technical Field
The utility model relates to a structural mode tests the field, more specifically relates to the electric power hammer commonly used in mode test field.
Background
The natural properties of the structure include frequency, damping, modal shape, etc. when the structure is excited by an external force, the engineer needs to determine how the external excitation affects the response of the structure through modal analysis, and the modal data can help the engineer to determine the weak areas of the structure and where improvement is needed.
The method mainly comprises a hammering method, wherein a tested structure is hammered by a force hammer to excite the structure to vibrate and collect structure vibration signals, and meanwhile, the force hammer is connected with a data collection device and transmits data to the data collection device through signal conversion of a force sensor. However, this method has certain limitations, and for some occasions, the related data of the structure cannot be accurately obtained.
The hammering method is held the power hammer through the experimenter and is hammered to the structure that awaits measuring, and the structure shape that awaits measuring is different, and some structures that await measuring have certain limitation in the space and be not convenient for manually strike or the manual error of striking great, and the manual uniformity of striking each time of not guaranteeing too easily, for example strike some and have the deviation, strike the direction and have the deviation. Therefore, modal testing by the hammering method has certain limitations.
In summary, the mode testing of the structure to be tested by the hammering method has certain limitations, accurate mode data cannot be obtained in some occasions where manual knocking is inconvenient, and errors exist in knocking points and knocking directions in each manual knocking, so that the method for performing the mode testing of the structure needs to be further improved and developed.
SUMMERY OF THE UTILITY MODEL
The to-be-solved problem of the utility model is to provide an electric power hammer, especially a small-size electric power hammer can not rely on manually to strike, can effectively solve the poor problem of modal data credibility that leads to the inconvenient manual test occasion of striking of narrow and small seal, overcomes each time and strikes the inconsistent shortcoming of some nonconformities and strike the direction, obtains comparatively accurate modal data manually.
In order to solve the above mentioned problems, the present invention adopts the following technical solution.
An electric power hammer (1), characterized by comprising:
the automatic reset electromagnet (2) generates different striking forces according to different switching-on voltages; the device comprises an iron core vertically arranged in the center of a supporting frame and a copper coil which forms a reset spring structure outside the iron core;
the fixing device (3) is connected with two sides of the supporting frame of the automatic reset electromagnet (2) and is used for suspending and supporting the automatic reset electromagnet (2) on the structure to be tested;
the hammer head (5) is arranged at the lower end of the iron core of the automatic reset electromagnet (2) and is used for striking the structure to be tested;
and the force sensor (4) is arranged at the lower end of the hammer head (5), and is in contact with the structure to be detected and used for detecting the striking force of the hammer head when the automatic reset electromagnet (2) works.
Furthermore, the force sensor (4) and the hammer head (5) are arranged towards one end of the surface of the structure to be measured, and the force sensor (4) is connected with the data acquisition equipment.
Further, when the automatic reset electromagnet (2) does not work, the force sensor (4) and the hammer head (5) are both located at the bottom end of the fixing device (3), and when the automatic reset electromagnet (2) works, at least the force sensor (4) crosses the bottom end of the fixing device (3) to be in contact with the structure to be detected.
Furthermore, the fixing device (3) is formed by combining two L-shaped supports which are arranged in a bilateral symmetry mode, the transverse ends of the two L-shaped supports are horizontally arranged at intervals in an opposite mode, and a frame structure with an opening at the upper part and an opening at the bottom part is formed by the transverse ends of the two L-shaped supports and the vertical ends of the two L-shaped supports; the tail end of the vertical end of the L-shaped support is connected with a supporting frame of the automatic reset electromagnet (2) and the automatic reset electromagnet (2) is accommodated between the frame structures; the transverse end of the L-shaped bracket is adsorbed on the surface of the structure to be measured by the electromagnet.
Further, when the automatic reset electromagnet (2) does not work, the force sensor (4) and the hammer head (5) are both positioned on the transverse end of the L-shaped bracket at the bottom end of the fixing device (3); when the automatic reset electromagnet (2) works, at least the force sensor (4) crosses the transverse end of the L-shaped support at the bottom end of the fixing device (3) and is contacted with the structure to be tested.
Furthermore, the supporting frame of the automatic reset electromagnet (2) is a rectangular frame, the iron core is arranged on the vertical central line of the rectangular frame, and the reset spring above the rectangular frame is compressed and is in a normal telescopic state when not in work.
Furthermore, mounting holes are formed between the supporting frame of the automatic reset electromagnet (2) and the fixing device (3) in the vertical direction, and the mounting holes are connected through bolts.
Furthermore, the hammer head (5) is provided with an installation part, the force sensor (4) is provided with an installation hole, and the force sensor (4) and the hammer head (5) are connected in a matched manner through the installation part and the installation hole; the mounting hole is a threaded hole.
Further, the hammer head (5) is in threaded connection with the force sensor (4) in an interference fit mode.
Further, the hammer head (5) is a soft rubber hammer head or a hard rubber hammer head or an aluminum alloy hammer head.
Therefore, the utility model provides an electrodynamic force hammer can effectively solve the poor problem of modal data reliability that leads to narrow and small inconvenient manual test occasion that strikes of sealing, overcomes the manual shortcoming of striking each time and strike the inconsistent and strike the direction inconsistent, obtains comparatively accurate modal data.
According to the utility model discloses the electrodynamic force hammer dismouting is simple and convenient, and is small, of low mass, can be used to multiple mode test occasion, especially is difficult for carrying out the occasion of manual striking, ensures that striking point and the direction of striking at every turn are unchangeable, can change the tup as required, and the test frequency range is wider, the low price, and development cycle is short.
Drawings
Fig. 1 is a schematic structural view of an electromotive hammer implemented by the present invention when not in operation.
Fig. 2 is a partial cross-sectional view of an electric power hammer according to an embodiment of the present invention when not in operation.
Fig. 3 is a schematic structural view of the electric power hammer according to the embodiment of the present invention.
The reference numerals in figures 1-3 correspond to the following:
an electric power hammer 1; the electromagnet 2 is automatically reset; a fixing device 3; a force sensor 4; a hammer head 5.
Detailed Description
In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention will be combined below to perform relevant descriptions on the purpose, technical solution and advantages of the embodiments of the present invention. The described embodiments of the present invention are some, but not all embodiments of the present invention, and all other embodiments obtained by those skilled in the art based on the described embodiments of the present invention all belong to the protection scope of the present invention.
Next, the electric power hammer 1 according to the embodiment of the present invention will be described in detail with reference to the drawings.
As shown in fig. 1 to 3, an electric power hammer 1 (especially a small-sized electric power hammer) according to an embodiment of the present invention includes an automatic reset electromagnet 2, a fixing device 3, a force sensor 4, and a hammer head 5.
As shown in fig. 1, the electric hammer 1 is composed of an automatic reset electromagnet 2, a fixing device 3, a force sensor 4 and a hammer head 5. The fixing device 3 is formed by combining two L-shaped brackets which are symmetrically arranged, the transverse ends of the two L-shaped brackets are horizontally arranged at intervals relatively, and a frame structure with an opening at the upper part and the bottom part is formed by the transverse ends of the two L-shaped brackets and the vertical ends of the two L-shaped brackets; the tail end of the vertical end of the L-shaped bracket is connected with a supporting outer frame of the automatic reset electromagnet 2 and the automatic reset electromagnet 2 is accommodated between the frame structures; the transverse end of the L-shaped support is adsorbed on the surface to be detected by the electromagnet, so that the electric power hammer 1 is fixed conveniently, the force sensor 4 and the hammer head 5 are arranged on the automatic reset electromagnet 2 and face one end of the surface to be detected, and the force sensor 4 is connected with the LMS data acquisition equipment. The fixing device 3 is bilaterally symmetrical, has a stable structure and can ensure the balance of force application.
The embodiment of the utility model provides an in, 2 centers of automatic re-setting electro-magnet are a permanent magnet iron core, and circumference is around having copper coil, and the copper coil above the carriage of automatic re-setting electro-magnet 2 forms reset spring, and the compression makes the iron core to remove downwards when electrified, and the iron core rebound resumes normal condition when not electrified. Simple structure, easy dismounting, low price, stable performance.
Wherein, the iron core resets automatically under the effect of spring after automatic re-setting electro-magnet 2 circular telegram, does up-and-down reciprocating motion, small so that the mode of the narrow and small closed surface of test, force sensor 4 converts pressure signal into the mode that the signal of telecommunication is used for the analysis structure that awaits measuring.
According to the utility model discloses electric power hammer 1, tup 5 and force sensor 4 establish in the one end of automatic re-setting electromagnet 2, after automatic re-setting electromagnet 2 circular telegram for tup 5 is reciprocal to be beaten the structure surface that awaits measuring with invariable hitting power under the drive of iron core, and each time hits power invariable, and hits the power invariable, is favorable to reducing the error, links to hit in order to avoid the secondary as far as possible through setting up 2 frequency of motion of automatic re-setting electromagnet.
As shown in fig. 1, the hammer head 5 is arranged at the front end of the force sensor 4, and is connected through threads, so that the hammer head is convenient to disassemble, assemble and replace, and in an actual modal test, the hardness of the hammer head 5, such as soft rubber, can be automatically replaced according to needs, and corresponds to a low frequency; hard rubber, corresponding to medium and low frequencies; the aluminum alloy corresponds to medium and high frequency, so that the modal test frequency range is wider.
According to the utility model discloses electric power hammer 1, the power of beating that automatic re-setting electro-magnet 2 produced can be by circular telegram voltage control, consequently can adjust the size of beating the power of beating through adjustment circular telegram voltage, is applicable to multiple mode test requirement, can realize the size of quick adjustment beating the power.
As shown in fig. 2, the mounting holes on the L-shaped brackets on the two sides of the fixing device 3 and the mounting holes on the automatic reset electromagnet 2 are threaded holes, and are connected through bolts, so that the fixing device is convenient to disassemble and assemble, and the mounting holes are in interference fit with the mounting holes, connected and fastened, so that the force can be applied conveniently.
According to some embodiments of the present invention, as shown in fig. 1 to 2, when the electric power hammer 1 of the embodiment is not in operation, the foremost hammer head 5 does not exceed the fixing device 3, and thus, the protection of the force sensor can be realized when the electric power hammer 1 is not in operation. When the electric power hammer 1 is operated, as shown in fig. 3, the hammer head 5 moves downward to exceed the lateral end of the L-shaped bracket of the fixing device 3, and strikes the surface to be measured.
As shown in fig. 2, the horizontal end of the L-shaped bracket of the fixing device 3 is adsorbed on the surface to be measured by the electromagnet, so that the electric power hammer 1 is fixed conveniently, the adsorption area is large, the adsorption is stable, the electric power hammer 1 cannot drop in the working process, and the performance is stable.
According to the utility model discloses electric power hammer 1, its automatic re-setting 2 iron cores after the circular telegram of electro-magnet produce and hit power, through connect fixing device 3 in order adsorbing on the object surface that awaits measuring in automatic re-setting 2 both sides of electro-magnet, tup 5 is established and is beaten in order to form hitting of structure that awaits measuring at the front end of automatic re-setting electro-magnet 2, and force sensor 4 is connected in order to store signal transmission to equipment with data acquisition equipment. The electric power hammer 1 is small in overall size and can be used for multiple modal testing occasions, each striking force is constant in size and consistent in hammering direction when striking, secondary continuous striking can be avoided as far as possible when striking frequency is appropriate, the striking force can be adjusted by adjusting the electrified voltage, and the hammer head hardness can be changed according to actual needs. The electrodynamic hammer is simple in structure, short in development period and beneficial to reducing cost.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention.
Claims (10)
1. An electric power hammer (1), characterized by comprising:
the automatic reset electromagnet (2) generates different striking forces according to different switching-on voltages; the device comprises an iron core vertically arranged in the center of a supporting frame and a copper coil which forms a reset spring structure outside the iron core;
the fixing device (3) is connected with two sides of the supporting frame of the automatic reset electromagnet (2) and is used for suspending and supporting the automatic reset electromagnet (2) on the structure to be tested;
the hammer head (5) is arranged at the lower end of the iron core of the automatic reset electromagnet (2) and is used for striking the structure to be tested;
and the force sensor (4) is arranged at the lower end of the hammer head (5), and is in contact with the structure to be detected and used for detecting the striking force of the hammer head when the automatic reset electromagnet (2) works.
2. The electrodynamic hammer (1) according to claim 1, in which the force sensor (4) and the hammer head (5) are arranged towards one end of the surface of the structure to be measured, the force sensor (4) being connected to a data acquisition device.
3. An electro-dynamic hammer (1) according to claim 1, characterised in that the force sensor (4) and the hammer head (5) are both located at the bottom end of the fixing device (3) when the self-resetting electromagnet (2) is not in operation, and at least the force sensor (4) passes over the bottom end of the fixing device (3) to be in contact with the structure to be tested when the self-resetting electromagnet (2) is in operation.
4. The electric power hammer (1) according to claim 1, wherein the fixing device (3) is formed by combining two L-shaped brackets which are arranged in bilateral symmetry, the transverse ends of the two L-shaped brackets are horizontally arranged at intervals in an opposite way, and a frame structure with an upper opening and a bottom opening is formed by the transverse ends of the two L-shaped brackets and the vertical ends of the two L-shaped brackets; the tail end of the vertical end of the L-shaped support is connected with a supporting frame of the automatic reset electromagnet (2) and the automatic reset electromagnet (2) is accommodated between the frame structures; the transverse end of the L-shaped bracket is adsorbed on the surface of the structure to be measured by the electromagnet.
5. The electro-dynamic hammer (1) according to claim 4, characterized in that the force sensor (4) and the hammer head (5) are both located above the lateral end of the L-shaped bracket at the bottom end of the fixing device (3) when the self-resetting electromagnet (2) is not in operation; when the automatic reset electromagnet (2) works, at least the force sensor (4) crosses the transverse end of the L-shaped support at the bottom end of the fixing device (3) and is contacted with the structure to be tested.
6. The electric power hammer (1) according to claim 1, wherein the support frame of the automatic reset electromagnet (2) is a rectangular frame, the iron core is arranged on the vertical central line of the rectangular frame, and the reset spring above the rectangular frame is compressed during operation and is in a normal telescopic state during non-operation.
7. The electric power hammer (1) according to claim 1, wherein mounting holes are arranged between the supporting frame of the automatic reset electromagnet (2) and the fixing device (3) in the vertical direction, and the mounting holes are connected through bolts.
8. The electric power hammer (1) according to claim 1, wherein the hammer head (5) is provided with a mounting portion, the force sensor (4) is provided with a mounting hole, and the force sensor (4) and the hammer head (5) are connected through the mounting portion and the mounting hole in a matching manner; the mounting hole is a threaded hole.
9. The electro-dynamic hammer (1) according to claim 1, characterized in that the hammer head (5) is screwed, interference-fitted, with the force sensor (4).
10. The electrodynamic hammer (1) according to claim 1, characterized in that the hammer head (5) is a soft rubber hammer head or a hard rubber hammer head or an aluminium alloy hammer head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021441596.6U CN212410010U (en) | 2020-07-21 | 2020-07-21 | Electrodynamic hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021441596.6U CN212410010U (en) | 2020-07-21 | 2020-07-21 | Electrodynamic hammer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212410010U true CN212410010U (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021441596.6U Expired - Fee Related CN212410010U (en) | 2020-07-21 | 2020-07-21 | Electrodynamic hammer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212410010U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114705282A (en) * | 2022-04-28 | 2022-07-05 | 浙江中新电力工程建设有限公司 | Modal-based lightning arrester fault detection method |
-
2020
- 2020-07-21 CN CN202021441596.6U patent/CN212410010U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114705282A (en) * | 2022-04-28 | 2022-07-05 | 浙江中新电力工程建设有限公司 | Modal-based lightning arrester fault detection method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210126 |
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| CF01 | Termination of patent right due to non-payment of annual fee |