CN103706552B - Floor vibration excitation signal generation device for furniture stability detection - Google Patents

Abstract

For the floor vibration pumping signal generation device of furniture Detection of Stability, the present invention relates to a kind of floor vibration pumping signal generating means for detecting furniture stability.It solve and also do not have at present to make the furniture on composite floor board produce the problem of the vibration source that vibration that is regular, accuracy is rocked.Detect for furniture.It comprises motor, cam, suspension rod, bearing body, elasticity hammering body and outstanding rope, the motor shaft of motor is connected with the wheel disc axle of cam to make the two coaxial rotating, one end of suspension rod is hinged on the top of bearing body, the other end of suspension rod connects the upper end of outstanding rope, the lower end of outstanding rope connects elasticity hammering body, cam is disk cam, and the outer rim of disk cam is working face, and the body of rod of suspension rod is positioned at the top of cam and is pressed on the working face of cam.

Description

Floor vibration excitation signal generation device for furniture stability detection

technical field

The invention relates to a floor vibration excitation signal generating device for detecting the stability of furniture.

Background technique

It is reported that between 1990 and 2007, the United States averaged 14,700 injuries caused by furniture dumping each year, most of which occurred in children under the age of 6. Our country does not yet have such statistics, but it can almost be said that the accident rate is higher than that of the United States.

Stability is an important index to evaluate the safety of furniture structure. Furniture with unqualified stability may bring personal injury or property loss to people's daily life. When the furniture is placed on the composite floor with a cushioning layer indoors, the elastic effect of the cushioning material under the floor will often cause the furniture to shake during use, and the degree of this shaking will vary depending on the cushioning material. For example, when someone walks, jogs or jumps around the furniture, it will have an impact load on the floor, which will indirectly cause the furniture to vibrate and shake, making the furniture unstable during use.

Depending on the furniture, it may vibrate and shake when it is used on the laminated floor with cushioning materials. Take certain automated means to collect data of changing physical quantities (such as acceleration, velocity, displacement) during the dynamic test of furniture, analyze and process the data measured in the experiment, and finally perform correlation analysis on the data, so as to be able to evaluate the quality of furniture. The feasibility of the dynamic evaluation method. But at present there is no vibration source that can make the furniture on the composite floor produce regular and accurate vibrations.

Contents of the invention

The purpose of the present invention is to provide a floor vibration excitation signal generating device for furniture stability detection to solve the problem that there is no vibration source that can make furniture on a composite floor produce regular and accurate vibrations. It includes a motor 1, a cam 2, a boom 3, a support body 4, an elastic hammering body 5 and a suspension rope 6. The motor shaft of the motor 1 is connected with the wheel shaft of the cam 2 so that the two rotate coaxially. One end of the rod 3 is hinged on the top of the support body 4, the other end of the suspension rod 3 is connected to the upper end of the suspension rope 6, the lower end of the suspension rope 6 is connected to the elastic hammering body 5, the cam 2 is a disc cam, and the disc cam The outer edge is the working surface, and the rod body of the suspension rod 3 is located above the cam 2 and is pressed on the working surface of the cam 2 .

Place the elastic hammering body 5 in the device of the present invention above the floor, start the motor 1, and the cam 2 rotates. Since the rod body of the suspension rod 3 is pressed on the working surface of the cam 2, the suspension rod 3 follows the working stroke of the cam 2. Periodic changes, swinging around the support body 4, the elastic hammering body 5 at the lower end of the suspension rope 6 hammers the floor periodically, causing the furniture on the floor to shake regularly, thus generating an excitation signal for research and testing . Since this signal is generated by a mechanical device, its vibration law can be fixed or adjusted, so it is very suitable as a vibration source for studying the vibration and shaking of furniture.

Description of drawings

Fig. 1 is a schematic structural view of the present invention. FIG. 2 is a top view of FIG. 1 , and FIG. 3 is a schematic structural view of the elastic hammering body 5 in the third embodiment.

Detailed ways

Specific Embodiment 1: The present embodiment will be specifically described below with reference to FIGS. 1 and 2 . This embodiment includes a motor 1, a cam 2, a boom 3, a support body 4, an elastic hammering body 5 and a suspension rope 6, and the motor shaft of the motor 1 is connected with the wheel shaft of the cam 2 so that the two rotate coaxially. , one end of the boom 3 is hinged on the top of the support body 4, the other end of the boom 3 is connected to the upper end of the suspension rope 6, and the lower end of the suspension rope 6 is connected to the elastic hammering body 5, and the cam 2 is a disc cam, disc-shaped The outer edge of the cam is the working surface, and the rod body of the suspension rod 3 is positioned above the cam 2 and is pressed on the working surface of the cam 2 .

Specific Embodiment 2: The present embodiment will be specifically described below with reference to FIG. 2 . Compared with Embodiment 1, this embodiment adds a frequency converter 7 , which is installed at the power supply end of the motor 1 to control the output speed of the motor 1 . With such arrangement, the hammering frequency of the present invention to the floor can be adjusted conveniently.

Specific Embodiment Three: The present embodiment will be specifically described below in conjunction with FIG. 3 . In this embodiment, the elastic hammer body 5 is a rubber ring filled with sand 5-1. With this configuration, the elasticity and weight meet the requirements and the cost is relatively low, and the rubber ring can be directly refitted with waste car tires and the like.

Specific Embodiment 4: The present embodiment will be specifically described below with reference to FIG. 1 . Compared with the first embodiment, this embodiment adds an elastic block 8 and a vertical rod 9 , and the elastic block 8 is arranged on the top of the vertical rod 9 and is located below the suspender 3 . In such a setting, when the boom 3 suddenly falls from the highest stroke position of the cam 2, the elastic block 8 will take over the boom 3 to avoid directly hitting the working surface of the cam 2, causing damage to the cam 2 or the boom 3.

Claims (4)

1. A floor vibration excitation signal generating device for furniture stability detection, characterized in that it includes a motor (1), a cam (2), a boom (3), a support body (4), an elastic hammering body (5 ) and the suspension rope (6), the motor shaft of the motor (1) is connected to the wheel shaft of the cam (2) so that the two rotate coaxially, and one end of the boom (3) is hinged on the support body (4) On the top, the other end of the suspender (3) is connected to the upper end of the suspension rope (6), and the lower end of the suspension rope (6) is connected to the elastic hammering body (5). Edge is the working surface, and the rod body of suspension rod (3) is positioned at the top of cam (2) and is pressed on the working surface of cam (2). 2. The floor vibration excitation signal generating device for furniture stability detection according to claim 1, characterized in that it also includes a frequency converter (7), and the frequency converter (7) is set at the power supply end of the motor (1) . 3. The floor vibration excitation signal generating device for furniture stability detection according to claim 1, characterized in that the elastic hammering body (5) is a rubber ring filled with sand (5-1) inside. 4. The floor vibration excitation signal generating device for furniture stability detection according to claim 1, characterized in that it also includes an elastic block (8) and a pole (9), and the elastic block (8) is arranged on the pole (9) and below the boom (3).