CN110879125A

CN110879125A - Force hammer auxiliary device and hammering assembly

Info

Publication number: CN110879125A
Application number: CN201911158498.3A
Authority: CN
Inventors: 高岩; 丁德云; 李腾; 邵斌; 孙方遒
Original assignee: BEIJING JIUZHOUYIGUI SHOCK AND VIBRATION ISOLATION Co Ltd
Current assignee: BEIJING JIUZHOUYIGUI SHOCK AND VIBRATION ISOLATION Co Ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-03-13

Abstract

The utility model relates to the technical field of mechanical equipment, a power hammer auxiliary device, hammering subassembly are disclosed, and this power hammer auxiliary device includes: the first end of the lever is connected with the force hammer, a fulcrum is arranged in the middle of the lever, and the lever can swing up and down around the fulcrum; and the slider of the crank slider mechanism is in sliding connection with a second end, opposite to the first end, of the lever, so that when the crank rotates to drive the slider to slide along the lever, the lever swings up and down around the fulcrum, and the force hammer is driven to hammer a hammered object. According to the force hammer auxiliary device, the crank-slider mechanism and the lever are adopted to drive the force hammer to hammer a hammered object, so that the working efficiency is improved, the motion track of a human hand is changed into circular motion, the stroke is increased, and the possibility of misoperation is reduced.

Description

Force hammer auxiliary device and hammering assembly

Technical Field

The present disclosure relates to the field of mechanical equipment technology, and in particular, to a power hammer assist device and a hammering assembly including the same.

Background

The hammering method is a fast, simple and effective method for rapidly obtaining structural modal parameters by using a force hammer provided with a force sensor to strike (excite) a tested object and by means of a pulse test principle and a modal theory by means of a modern test technology and Fast Fourier Transform (FFT) of a microcomputer. At present, a 'hammering experiment' usually needs to manually hold a power hammer to knock a tested object, however, continuous knocking and uneven hammering strength often occur in the mode, even the phenomenon of exceeding the range of the power hammer is also frequent, and much inconvenience is brought to smooth performance of the 'knocking experiment'. In the hammering process, the motion track of the hammer holding hand is similar to a straight line or a small-angle arc line, the motion track with the smaller stroke needs manual control, the risk of misoperation is increased, and the error of an experiment is increased. Such as: measuring the attenuation rate of an object or calculating a transfer function, and hammering tens of times or even hundreds of times is needed in one experiment. It is a great challenge for the force hammer user.

Disclosure of Invention

Technical problem to be solved

An object of the present disclosure is to solve at least one aspect of the above problems and disadvantages in the related art.

(II) technical scheme

In order to solve the above technical problem, the present disclosure provides a force hammer auxiliary device, which includes:

the first end of the lever is connected with the force hammer, the middle of the lever is provided with a fulcrum, and the lever can swing up and down around the fulcrum; and

and the slider of the crank slider mechanism is in sliding connection with a second end, opposite to the first end, of the lever, so that when the crank rotates to drive the slider to slide along the lever, the lever swings up and down around the fulcrum, and the force hammer is driven to hammer a hammered object.

In some embodiments, the slider is annular and is fitted over an outer surface of the second end of the lever to slidably couple with the lever.

In some embodiments, the second end of the lever is provided with a sliding groove, and the sliding block is slidably connected with the sliding groove.

In some embodiments, the hammer blows against the hammer object when the slider of the crank-slider mechanism is in a bottom dead center position.

In some embodiments, the axis of the lever portion of the hammer coincides with the axis of the lever.

In some embodiments, the lever portion of the hammer is detachably connected to the lever.

In some embodiments, the lever portion of the hammer is integral with the lever.

In some embodiments, a crank of the slider-crank mechanism is provided with a protruding handle for rocking the crank.

In some embodiments, the hammer assist device further comprises a drive device for driving the crank to rotate.

There is also provided, in accordance with an embodiment of another aspect of the present disclosure, a hammering assembly including a force hammer and a force hammer assist device as described above.

(III) advantageous effects

The force hammer auxiliary device and the hammering assembly provided by the disclosure drive the hammer to hammer a hammered object by adopting the crank-slider mechanism and the lever, so that the working efficiency is improved, the movement track of a human hand is changed into circular motion, the stroke is increased, the possibility of misoperation is reduced, and the control on the hammering force can be realized by controlling the speed of the crank.

Drawings

FIG. 1 is a schematic structural view of a preferred embodiment of a force hammer assist device according to the present disclosure;

fig. 2 is another structural schematic diagram of the force hammer assist device shown in fig. 1.

Detailed Description

Specific embodiments of the present disclosure are described in further detail below with reference to the accompanying drawings and examples. The following examples are intended to illustrate the present disclosure, but are not intended to limit the scope of the present disclosure.

Fig. 1 and 2 show a preferred embodiment of a force hammer assist device according to the present disclosure. As shown, the hammer assist device includes a lever 2 and a crank-slider mechanism. Wherein, the first end of lever 2 is connected with power hammer 1, and the middle part of lever 2 has fulcrum 3, and this lever 2 can rotate around fulcrum 3. A crank 6 of the crank-slider mechanism is rotatably connected to a bracket 7, and a slider 4 of the crank-slider mechanism is slidably connected to a second end of the lever 2 opposite to the first end, so that when the crank 6 rotates to drive the slider 4 to slide along the lever 2 through the connecting rod 5, the lever 2 swings up and down around the fulcrum 3, thereby driving the power hammer 1 to hammer a hammer object. When the crank 6 of the crank-slider mechanism rotates continuously, the slider 4 slides on the second end of the lever 2 in a reciprocating manner, and then the lever 2 is driven to swing up and down around the fulcrum 3 of the lever, so that the force hammer 1 connected with the first end of the lever 2 hammers the object to be hammered at intervals. The power hammer auxiliary device provided by the disclosure can improve the working efficiency, avoid human errors and ensure the hammering quality. Further, by controlling the rotation speed of the crank 6, the object of controlling the hammering force can be achieved.

In an exemplary embodiment, as shown in fig. 1 and 2, the slider 4 of the slider-crank mechanism is in the form of a ring) and is fitted over the outer side surface of the second end of the lever 2 to be slidably connected with the lever 2. It should be noted that, in some other embodiments of the present disclosure, a sliding groove may be provided at the second end of the lever 2, and the slider 4 is slidably connected to the sliding groove.

In an exemplary embodiment, as shown in fig. 1 and 2, when the slider 4 of the crank-slider mechanism is at the bottom dead center position, the force hammer 1 hammers the hammer object. That is, when the slider 4 is located at an end of its stroke close to the hammer 1, the hammer 1 hammers the hammer object.

In an exemplary embodiment, as shown in fig. 1 and 2, the hammer 1 includes a rod portion and a hammer body connected to the rod portion. The rod part of the force hammer 1 is detachably connected with the lever 2, for example, the force hammer can be in threaded connection, or a positioning pin is arranged or a clamp is adopted to drill a threaded hole, then the force hammer is fixed in a flat head bolt mode, so that the force hammer 1 can be replaced and maintained conveniently, and the distance between the force hammer body and the lever 2 can be adjusted to adapt to the hammered objects with various heights. It should be noted that in other embodiments of the present disclosure, the rod of the hammer may be integral with the lever 2.

In an exemplary embodiment, as shown in fig. 1 and 2, the axis of the lever part of the hammer coincides with the axis of the lever 2. It should be noted that in other embodiments of the present disclosure, the rod of the hammer may not coincide with the axis of the lever 2, for example, at an angle smaller than 15 °.

In an exemplary embodiment, as shown in fig. 1 and 2, a crank 6 of the slider-crank mechanism is provided with a protruding handle (not shown) for rocking the crank 6 for rotation.

In an exemplary embodiment, the hammer assist device further comprises a driving device (not shown), such as a servo motor, for driving the crank 6 to rotate, so as to drive the crank 6 to rotate continuously, thereby driving the hammer 1 to hammer the object to be hammered via the lever 2, so as to further save manpower.

According to another aspect of the present disclosure, there is also provided a hammering assembly comprising a force hammer 1 and a force hammer assist device as described above.

According to the force hammer auxiliary device and the hammering assembly disclosed by the embodiment of the disclosure, the crank-slider mechanism and the lever 2 are adopted to drive the force hammer 1 to hammer a hammered object, so that the working efficiency is improved, the movement track of a human hand is changed into circular motion, the stroke is increased, the possibility of misoperation is reduced, and the control of the hammering force can be realized by controlling the speed of the crank 6. The hammering test is smoothly carried out, so that the accuracy of the test result is ensured. In addition, the device has simple structure and lower cost.

The present disclosure is to be considered as limited only by the preferred embodiments and not limited to the specific embodiments described herein, and all changes, equivalents, and modifications that come within the spirit and scope of the disclosure are desired to be protected.

Claims

1. A force hammer assist device, comprising:

2. The hammer assist device of claim 1, wherein the slider is ring-shaped and fits over an outer surface of the second end of the lever to slidably engage the lever.

3. The hammer assist device of claim 1, wherein the second end of the lever is provided with a sliding slot, and the slider is slidably coupled to the sliding slot.

4. The hammer assist device according to claim 1, wherein the hammer strikes the hammer object when the slider of the crank-slider mechanism is at the bottom dead center position.

5. A force hammer assist device according to claim 1, wherein the axis of the lever portion of the force hammer coincides with the axis of the lever.

6. The hammer assist device of claim 5, wherein the lever portion of the hammer is detachably connected to the lever.

7. A force hammer assist device according to claim 5, wherein the lever portion of the force hammer is integral with the lever.

8. A force hammer assist device according to any one of claims 1 to 7, wherein a projecting handle for rocking the crank is provided on the crank of the slider-crank mechanism.

9. A force hammer assist device according to any one of claims 1 to 7, further comprising drive means for driving rotation of the crank.

10. A hammering assembly, comprising:

a force hammer; and

a force hammer assist device according to any one of claims 1 to 9.