CN202066660U

CN202066660U - Elastic force hammer

Info

Publication number: CN202066660U
Application number: CN2011201631258U
Authority: CN
Inventors: 应怀樵
Original assignee: BEIJING ORIENT INSTITUTE OF NOISE & VIBRATION
Current assignee: BEIJING ORIENT INSTITUTE OF NOISE & VIBRATION
Priority date: 2011-05-20
Filing date: 2011-05-20
Publication date: 2011-12-07
Anticipated expiration: 2021-05-20

Abstract

The utility model discloses an elastic force hammer which comprises an elastic hammer and a hammer body connected with the elastic hammer. The hammer body comprises a first hammer body part, a second hammer body part and an elastic energy accumulation part between the first hammer body part and the second hammer body part. The force applied to the second hammer body part is transferred to the first hammer body part through the elastic energy accumulation part, thereby prolonging the action time of the applied force. With the adoption of the elastic energy accumulation part, the elastic force hammer can achieve the purpose of accumulating the excitation energy at low frequency, and is very applicable to the excitation force to the large structure.

Description

A kind of elastic force hammer

Technical field

The utility model relates to a kind of power hammer device with elastic hammer head, and relating in particular to is the elastic force hammer that need use when the low large scale structure of vibration frequency is encouraged.

Background technology

Elastic force hammer is used for exciting force is applied to and is energized structure, and Fig. 1 schematically shows the structure of traditional elastic force hammer.As shown in Figure 1, traditional elastic force hammer 100 comprises elastic hammer head 110, force cell 120 and hammer body 130.Elastic hammer head 110 generally includes and is used to knock front end 112 that is energized structure and the rear end 114 that is used to be connected hammer body 130.Front end is made by resilient material usually, makes and the rear end is generally hard metal material, and for example closely is connected to hammer body by helicitic texture.Force cell 120 is installed between tup 110 and the hammer body 130.When this power hammer 100 knocks when being energized structure by tup 110, by the exciting force size of 100 pairs of structures of force cell 120 ergometries hammer.Because tup 110 adopts the rubber elastomeric material to make usually, so the power hammer can bounce-back after knocking leaves and is energized structure, thereby guarantees in the whole process of motivation, applied single surging force to being energized structure.According to exciting force be energized the Frequency Response that structural vibrations response can be calculated this structure.

Be energized structure and only be concerned about the natural frequency of vibration of lower-order usually, therefore wish the low-frequency vibration of excitation structure better of power hammer.For large scale structure, its quality is bigger, so the natural frequency of vibration is just lower, can excite lower low-frequency vibration so wish the power hammer.

For the exciting force of identical size, its frequency characteristic is relevant with the excitation pulse of exciting force, and driving pulse is wide more, and its frequency characteristic just is tending towards lower frequency more, that is to say that the energy of exciting force more concentrates on low-frequency range.

In general the material of making tup is soft more, in the process of motivation tup distortion just big more, will make that tup and the time that is in contact with one another that is energized between the structure are long more, driving pulse is just wide more, thereby makes excitation energy just concentrate on low frequency more.

The big more exciting force that is energized the structure needs that quality is big more.If yet the material of tup is soft excessively, can can't bear and transmit bigger exciting force owing to toughness is not enough.Therefore for large-scale low frequency configuration, just become a pair of contradiction between the size of exciting force and the pulse width, and the structure that existing elastic force hammer usually is difficult to be effectively applied to large-scale encourages.

Therefore, needed is exactly still can prolong excitation pulse effectively a kind of effect following time at big exciting force, makes excitation energy effectively be gathered in low-frequency range, thereby is used in the elastic force hammer that large scale structure is encouraged.

The utility model content

In view of the above problems, the utility model has been proposed so that a kind of novel elastic power hammer that overcomes the problems referred to above or solve or slow down the problems referred to above at least in part is provided.

According to an aspect of the present utility model, a kind of elastic force hammer is provided, comprise elastic hammer head and the hammer body that links to each other with described elastic hammer head, it is characterized in that this hammer body comprises the first hammer body part that is couple to elastic hammer head; Reception is applied to the second hammer body part of the power on the elastic force hammer; And being arranged in elasticity cumulative part between first hammer body part and second hammer body part, the power that wherein is applied on second hammer body part partly is delivered to the first hammer body part via this elasticity cumulative, thereby prolongs the action time of the power that applies.

Alternatively, the first hammer body partial design becomes to have concave structure and second hammer body partly is designed to have the convex structure of coupling, so that guide the relative motion of first and second hammer bodies part according to the coupling of matrix and convex structure.

Alternatively, the first hammer body partial design becomes to have the convex structure and second hammer body partly is designed to have the concave structure of coupling, so that guide the relative motion of first and second hammer bodies part according to the coupling of matrix and convex structure.

Alternatively, the elasticity cumulative partly is the cumulative rubber ring.

Alternatively, first hammer body part partly is connected by the screw mode with second hammer body, and wherein first hammer body partly has screw, second hammer body partly has unthreaded hole, screw is screwed in the screw by unthreaded hole, thereby makes that first and second hammer bodies parts can only move toward one another, and can not do to deviate from motion.

By hammer body being divided into two separating parts, and between two separating parts, the elasticity cumulative part such as elasticity cumulative rubber ring is installed according to elastic force of the present utility model hammer.Because the elasticity cumulative is partly hammered the transmittance process that is energized structure one for exciting force into shape from elastic force must link, therefore it can delay the power hammer to being energized the process that structure applies exciting force, increase excitation pulse, thereby reached the purpose that excitation energy is gathered in low frequency.Make and be very suitable for applying exciting force for large scale structure according to elastic force hammer of the present utility model.

Description of drawings

By reading hereinafter detailed description of the preferred embodiment, various other advantage and benefits will become cheer and bright for those of ordinary skills.Accompanying drawing only is used to illustrate the purpose of preferred implementation, and does not think restriction of the present utility model.And in whole accompanying drawing, represent identical parts with identical reference symbol.In the accompanying drawings:

Fig. 1 shows the synoptic diagram of elastic force hammer of the prior art; And

Fig. 2 shows the synoptic diagram according to the elastic force hammer of an embodiment of the utility model.

Embodiment

The utility model will be further described below in conjunction with accompanying drawing and concrete embodiment.Fig. 2 shows the synoptic diagram according to the elastic force hammer 200 of an embodiment of the utility model.As shown in Figure 2, elastic force hammer 200 has with traditional elastic power shown in Figure 1 hammers 100 similar structures into shape, for example also has elastic hammer head 210.The similar of elastic hammer head 210 for example equally also comprises front-end and back-end in elastic hammer head shown in Figure 1 110.In addition, alternatively, elastic force hammer 200 also has the force cell 220 that is arranged between hammer body 230 and the tup 210, and it is used to measure the exciting force size of 200 pairs of structures of elastic force hammer equally.

Elastic force hammer 200 elastic forces that are different from prior art shown in Figure 2 are hammered the structure that 100 parts are its hammer body 230 parts into shape.As shown in Figure 2, hammer body 230 comprises the first hammer body part 232 that is couple to elastic hammer head 210 and is used to receive the second hammer body part 234 that is applied to the exciting force on the elastic force hammer 200.In addition, hammer body 230 also comprises the elasticity cumulative part 236 that is arranged between the first hammer body part 232 and the second hammer body part 234.

Because elasticity cumulative part 236 is arranged between the first hammer body part 232 and the second hammer body part 234 so that the first hammer body part 232 can not directly contact with the second hammer body part 234, therefore, when the second hammer body part 234 receive the outside apply exciting force the time, this exciting force need pass to the first hammer body part 234 via elasticity cumulative part 236, and further is delivered to elastic hammer head and knocks and be energized structure.Elasticity cumulative part 236 has the certain deformation ability, thus when transmitting exciting force, can be owing to pressurized be out of shape, making wins can produce relative motion between the hammer body part 232 and the second hammer body part 234.

Particularly, when adopting 200 pairs of structures of elastic force hammer to encourage, in the process that exciting force increases, elasticity cumulative part 236 is in the pressurized process of continuous increase, and generation distortion thereupon, thereby reduced the movement velocity of first hammer body part owing to the relative motion between first and second hammer bodies part, it is slowed down to the process that is energized the structure application of force, so deformation process of the elastic hammer head 210 that slowed down, elastic hammer head and the duration of contact that is energized structure have promptly been prolonged, make the pulse width that applies exciting force strengthen, and make the energy of exciting force be gathered in low frequency more.Therefore, elastic force hammer 200 can obviously be alleviated the size of exciting force and the contradiction between the pulse width, and can be suitable for well large scale structure is tested.

As shown in Figure 2, elasticity cumulative part 236 can be the cumulative rubber ring with certain deformability.Yet the utility model is not limited to this, and any elastomeric element that has certain deformability and can recover shape under pressure after pressure disappears can be used as the elasticity cumulative part 236 in the utility model.

As shown in Figure 2, the first hammer body part 232 is designed to have concave structure and the second hammer body part 234 is designed to have the convex structure of coupling, so that guide the relative motion that also can guarantee between first and second hammer bodies part according to the coupling of matrix and convex structure.Certainly, the utility model is not limited to this, for example, according to an embodiment of the present utility model, also the first hammer body part 232 can be designed to have the concave structure that the convex structure and the second hammer body part 234 are designed to have coupling.

Can there be multiple mode to fix each parts in the hammer body 230.A kind of embodiment that fixes each parts in the hammer body 230 in the screw mode has been shown among Fig. 2.Particularly, the first hammer body part 232 has screw 237, the second hammer body parts 234 and has unthreaded hole 239, and screw 238 is screwed in the screw 237 by unthreaded hole 239, thereby makes that first and second hammer bodies parts can only move toward one another, and can not do to deviate from motion.Elasticity cumulative part 236 is clipped between the first hammer body part 232 and the second hammer body part 234, and the hammer body part 232 of winning can not directly be contacted with the second hammer body part 234, thereby the transmittance process that guarantees exciting force must be via elasticity cumulative part 236.

Adopt elastic force hammer of the present utility model, can produce very big exciting force and very long excitation pulse, be enough to motivate each rank low-frequency vibration that the big quality that is suitable for such as railway bridge is energized structure.By actual tests relatively, under the same terms, the width that produces driving pulse according to elastic force hammer of the present utility model has improved 30%-50% than ordinary elasticity power hammer.

It should be noted that the foregoing description describes the utility model rather than the utility model is limited, and those skilled in the art can design alternative embodiment under the situation of the scope that does not break away from claims.In the claims, any reference symbol between bracket should be configured to restriction to claim.Word " comprises " not to be got rid of existence and is not listed in element or step in the claim.Being positioned at word " " before the element or " one " does not get rid of and has a plurality of such elements.The utility model can be realized by means of the hardware that includes some different elements and by means of the computing machine of suitably programming.In having enumerated the unit claim of some devices, several in these devices can be to come imbody by same hardware branch.Any order is not represented in the use of word first, second and C grade.Can be title with these word explanations.

Claims

1. an elastic force hammer comprises elastic hammer head and the hammer body that links to each other with described elastic hammer head, it is characterized in that described hammer body comprises:

Be couple to the first hammer body part of described elastic hammer head;

Reception is applied to the second hammer body part of the power on the elastic force hammer; And

Be arranged in the elasticity cumulative part between described first hammer body part and described second hammer body part, the power that is applied on second hammer body part partly is delivered to the first hammer body part via this elasticity cumulative, thereby prolongs the action time of the power that applies.

2. elastic force hammer as claimed in claim 1, it is characterized in that, the described first hammer body partial design becomes to have concave structure and second hammer body partly is designed to have the convex structure of coupling, so that guide the relative motion of described first and second hammer bodies part according to the coupling of described matrix and convex structure.

3. elastic force hammer as claimed in claim 1, it is characterized in that, the described first hammer body partial design becomes to have the convex structure and second hammer body partly is designed to have the concave structure of coupling, so that guide the relative motion of described first and second hammer bodies part according to the coupling of described matrix and convex structure.

4. as any the described elastic force hammer among the claim 1-3, it is characterized in that described elasticity cumulative partly is the cumulative rubber ring.

5. as any the described elastic force hammer among the claim 1-3, it is characterized in that, described first hammer body part partly is connected by the screw mode with second hammer body, wherein said first hammer body partly has screw, second hammer body partly has unthreaded hole, and screw is screwed in the described screw by described unthreaded hole.

6. as the described elastic force hammer of among the claim 1-3 any, it is characterized in that this elastic force hammer also comprises the force cell that is arranged between described tup and the hammer body, be used for measuring outwards being applied to and knocked structural exciting force by this elastic force hammer.