KR101195216B1

KR101195216B1 - Endurance test apparatus

Info

Publication number: KR101195216B1
Application number: KR20100053606A
Authority: KR
Inventors: 임상희
Original assignee: 태하메카트로닉스 (주)
Priority date: 2010-06-07
Filing date: 2010-06-07
Publication date: 2012-10-29
Also published as: KR20110133929A

Abstract

In the present invention, a durability test apparatus is disclosed. The durability test apparatus includes a frame, a rotating bar having one end hinged to one side of the frame, a rotating shaft fitted to the other end of the rotating bar, and a plurality of elastic members arranged around the rotating shaft and circulating around the rotating shaft to strike the test object. A rotating body comprising impact bodies.
According to the present invention, there is provided a durability test apparatus for the performance evaluation of the exercise device to which a repetitive dynamic load is applied.

Description

Endurance test apparatus

The present invention relates to a durability test apparatus for evaluating the durability of exercise equipment such as treadmills.

In modern society with advanced science and technology, food production is increasing and nutrition is excessive. On the other hand, due to lack of automation, adult diseases such as obesity, hypertension and diabetes are threatening the health of modern people.

In recent years, the rapid increase in the obese population is raising interest in health, and to meet this interest is increasing the use of exercise equipment that can be used at home or health clubs.

With the rapid expansion of the sports equipment industry, efforts are being made to evaluate the durability of the sports equipment and to improve the quality of the sports equipment based on the evaluation results.

An object of the present invention is to provide a durability test device for evaluating the performance of the exercise device to which a repetitive dynamic load is applied.

In order to achieve the above object and other objects, the durability test apparatus of the present invention,

frame;

A rotation bar having one end hinged to one side of the frame;

A rotary shaft fitted to the other end of the pivot bar; And

And a rotating body including a plurality of elastic impact bodies arranged around the rotation axis, circulatingly driven about the rotation axis, and hitting a test object.

For example, the rotating body includes first and second rotating plates spaced apart from each other in the direction of the rotation axis,

A group of elastic shock bodies fastened to the first rotating plate and two groups of elastic impact bodies fastened to the second rotating plate are fastened at staggered positions to alternately strike the test object.

In this case, the elastic shock bodies may be fastened to symmetrical positions of the first and second rotating plates about the rotating shaft.

For example, the elastic shock bodies may be disposed at a vertex position of an equilateral triangle having the rotation axis.

For example, the elastic impactor may be provided as a tire member.

For example, the test subject may be provided as a treadmill.

For example, the rotating body may be in close contact with the belt of the treadmill and driven driven about the rotating shaft with the progress of the belt.

In this case, the elastic impact bodies that are laden along the outer edge of the rotating body may be sequentially rubbed on the belt and pushed in the direction of movement of the belt.

For example, the pivoting bar may be driven reciprocally in a clockwise / counterclockwise direction based on a hinge axis of one end and following a movement of a rotation axis of the other end.

For example, the pivot bar may be elastically coupled to the frame.

In this case, the rotation bar may be coupled to the frame via an elastic member at a position between the hinge shaft and the rotation shaft.

For example, the elastic member may be provided with a coil spring having one end coupled to the pivot bar and the other end coupled to the frame.

For example, the frame,

Horizontal support on which the test object is placed;

A first vertical frame extending upward on the horizontal support and coupled with a hinge axis of the pivoting bar; And

And a second vertical frame extending upward on the horizontal support, the second vertical frame being interposed to the pivoting bar via an elastic member.

For example, each of the first and second vertical frames includes a pair of first and second vertical frames extending parallel to each other,

The pivoting bar forms a hinge coupling with the pair of first frames, and forms an elastic coupling with the pair of second frames.

The rotating body is rotatably supported between the pair of pivot bars.

For example, a post into which the weight member is fitted may be formed in the rotation bar.

Here, the post may be formed coaxially with the rotation axis.

The durability test apparatus may further include sensors for detecting impact test data for performance evaluation of the test object.

For example, the durability test apparatus may include at least one of a temperature sensor, an acceleration sensor, and a driving signal sensor.

For example, the temperature sensor may detect frictional heat between the belt of the crawler and the deck surrounded by the belt.

For example, the acceleration sensor may detect the vibration absorbing performance of the test object in response to the impact of the elastic impactor.

For example, the driving signal sensor may detect a change in the waveform of the driving signal in response to the collision of the elastic impactor.

According to the durability test apparatus of the present invention, it comprises a rotary body driven rotationally in accordance with the belt running of the treadmill, the elastic impactor is adapted to the running speed of the belt by arranging a plurality of elastic impactor along the outer periphery of the rotating body As a result, it will hit the belt with a corresponding impact frequency.

Therefore, it is possible to provide a shock band of a wide band, in particular a collision test apparatus suitable for high frequency impact test can be provided.

In addition, it is not necessary to provide a separate drive mechanism in the crash test apparatus by applying a mechanism in which the belt is driven on the drive side and the elastic shock body is circulated continuously according to the belt running.

According to the present invention, the elastic impact body is applied as a collision source, and the rotating body including the elastic impact body is elastically coupled to the frame, thereby ensuring wide margin of tolerance during the design and assembly process of the device. Yes, strict process control is not required.

1 is a perspective view of a durability test apparatus according to an embodiment of the present invention.
2 is a perspective view showing the durability test apparatus from another angle.
3 is a view showing the durability test apparatus from the side.
4 is a view showing the durability test apparatus from above.

Hereinafter, the durability test apparatus 100 according to a preferred embodiment of the present invention will be described.

1 and 2 are perspective views showing the durability test apparatus 100 according to one embodiment from different directions. 3 is a view showing the durability test apparatus 100 from the side. 4 is a view showing the durability test apparatus 100 from above.

Hereinafter, the durability test apparatus 100 using the treadmill 200 configured to run on the endless belt 250 will be described as an example. However, the technical scope of the present invention is not limited thereto.

The durability test apparatus 100 has a frame on which the treadmill 200 as a test object is seated. More specifically, the frame includes a horizontal support 110 on which the treadmill 200 is placed, and first and second vertical frames 111 and 112 extending upward from the horizontal support 100. do. The horizontal support 110 constitutes a bottom surface on which the treadmill 200 is seated on the xy plane, and the horizontal support 110 has a transport roller 118 for the purpose of facilitating the movement of the durability test apparatus 100. ) May be attached.

Each of the first and second vertical frames 111 and 112 may be provided in a pair extending parallel to each other from the horizontal support 110. Each of the first and second vertical frames 111 and 112 is provided in pairs on the outside of the rotation bar 130 to stably support the rotation bar 130 to be described later, or hinge-couple the rotation bar 130 or elastically. Combine. This will be described later in detail.

The rotation bar 130 oscillates around the first vertical frame 111 while receiving a dynamic load, and buffers the oscillation through elastic coupling with the second vertical frame 112. In order to stably support the movement of the rotation bar 130, the first and second vertical frames 111 and 112 are provided with reinforcing structures for reinforcing structural rigidity.

For example, a first reinforcement frame 113 may be interposed between the pair of first vertical frames 111 to connect the first vertical frames 111 to support each other.

In addition, a second reinforcing frame 114 may be interposed between the second vertical frame 112 and the horizontal support 110 to support the second vertical frame 112. The second reinforcing frame 114 extends from the horizontal support 110 to abut the second vertical frame 112 in an oblique direction.

A third reinforcement frame 115 may be interposed between the first vertical frame 111 and the second vertical frame 112 to support each other. The third reinforcement frame 115 connects between the first and second vertical frames 111 and 112 so that they are supported with respect to each other.

On the other hand, the durability test apparatus 100 of the horizontal support 110 on which the treadmill 200 (test object, the same below) is placed, and the first vertical frame 111 extending side by side on the horizontal support 110 A rotation bar having a pair and having one end hinged to the first vertical frame 111 and the other end supporting the rotating body 150 in close contact with the belt 250 of the treadmill 200. 130.

The rotating body 150 is supported between a pair of rotating bars 130 extending side by side. The rotating body 150 is fitted to the rotating shaft 142 extending across the rotation bar 130, is in close contact with the belt 250 of the treadmill 200 is driven driven in accordance with the drive of the belt 250 .

The rotating body 150 includes first and second rotating plates 151 and 152 (see FIG. 2) fitted to the rotating shaft 142, and is elastically fastened at symmetrical positions of the first and second rotating plates 151 and 152, respectively. Sieve 155. The first and second rotating plates 151 and 152 are disposed to face each other and are coupled to each other by fasteners 157 (FIG. 4) such as bolt-nuts. In addition, the first and second rotating plate assemblies 151 and 152 may be fitted on the rotating shaft 142 via the bearing 158 and rotatably supported with respect to the rotating shaft 142 (see FIG. 4).

The first and second rotary plates 151 and 152 may have a radial shape in which the first and second rotating plates 151 and 152 are similar to an equilateral triangle shape having the rotation axis 142 as the concave surface. In this case, the elastic impact member 155 may be fastened to a vertex position of the equilateral triangle, and may be fixed on the first and second rotating plates 151 and 152 by fasteners such as bolts and nuts.

The elastic impactor 155 is arranged in a symmetrical position with respect to the rotation axis 142. For example, three elastic impactors 155 may be fastened to each of the first and second rotation plates 151 and 152. In addition, a total of six elastic impact bodies 155 may be arranged at equal intervals along the outer edge of the rotating body 150. The elastic impact member 155 may be provided as a tire member, but is not limited thereto.

A post 170 for supporting a weight member (not shown) may be formed at a portion coaxial with the rotation shaft 142 and extended to the outside of the rotation bar 130. A weight member (not shown) having an appropriate self weight may be coupled to the post 170.

The elastic impact member 155 is pressed against the belt 250 of the treadmill 200 by the weight of the rotating bar 130 and the weight member (not shown), and is in close contact with the surface of the belt 250. . Simultaneously with the movement of the belt 250, the elastic impact body 155 is pushed along the running direction by the frictional force with the belt 250, and a new elastic impact body 155 which follows is in contact with the belt 250 and then the frictional force. While repeating the push, the rotating body 150 is driven to rotate about the rotation axis 142.

In the rotary body 150 accelerated by the frictional force of the elastic impactor 155, the trailing elastic impactor 155 strikes the belt 250 on the impact force (shock amount, F = mrω ² ) corresponding to the centrifugal force. do. A plurality of elastic impact bodies 155 arranged along the outer edge of the rotating body 150 circulates and strikes the belt 250, and the impact amount corresponding to the rotating state of the rotating body 150 is the treadmill 200. Is passed).

The elastic shock bodies 155 fastened to the first and second rotating plates 151 and 152 are alternately contacted on the belt 250 and are subjected to frictional force, and a total of six elastic shock bodies along the outer edge of the rotating body 150. The circulation of 155 constitutes one rotation of the rotating body 150. A total of six elastic impact bodies 155 are involved in one rotation of the rotating body 150, thereby providing a substantially uniform rotational power, and the rotating body 150 is driven at a substantially uniform speed, thereby rotating impact. It is possible to prevent the degradation of the durability of the test apparatus 100 according to.

The durability test apparatus 100 may reproduce the dynamic impact of the user walking / running on the treadmill 200. For example, in the elastic impact member 155 which is fastened alternately and impacts the belt 250 on the first and second rotating plates 151 and 152 spaced from each other in the direction of the rotating shaft 142, The distance d2 between the adjacent elastic shock bodies 155 in the direction 142 may correspond to the distance between the feet of the user. Accordingly, the group of elastic shock bodies 155 fastened to the first rotating plate 151 and the two groups of elastic shock bodies 155 fastened to the second rotating plate 152 through a statistical or average approach of body size. The spacing d2 between them can be optimized.

In addition, the distance d1 (FIG. 3) between the preceding elastic impact member 155 and the trailing elastic impact member 155 sequentially approaching the belt 250 while driving may correspond to the stride length of the user. For example, through a statistical or average approach to body size, the distance d1 between neighboring elastic shock bodies 155 along the outer edge of the rotating body 150 may be optimized. Alternatively, in order to perform the acceleration test on the impact durability characteristics, it may be configured to reduce the distance d1 between the front and rear elastic impact members 155 and to apply more dynamic impact in a short time.

The rotary body 150 is driven at a corresponding rotational speed to follow the running speed of the belt 250, the impact body 155 arranged along the outer periphery of the rotary body 150 is the impact frequency corresponding to the running speed As a result, the belt 250 may be charged. As described above, the plurality of shock bodies 155 circulate and hit the test target 200 so that the durability test can be performed at a desired frequency even in the high frequency region, and the acceleration experiment through the impact of the high frequency band is possible.

For example, in the 1-axis translational impact device, a separate active driving means is required for raising and lowering the impact source, which increases the structure of the impact device and increases energy consumption. On the contrary, in the proposed structure, as the rotary body 150 is driven manually according to the movement of the belt 250, a plurality of elastic impact bodies 155 arranged on the outer edge of the rotary body 150 are used to lift the belt 250. Because of the price, there is no need for a separate drive source, there is an effect that the manufacturing cost is reduced.

In addition, in the 1-axis translational impact device, the impact frequency is limited according to the response characteristics of the driving source, and is not particularly suitable for high frequency impact experiments. On the contrary, in the proposed structure, since the impact frequency is adaptively provided corresponding to the running speed of the belt 250, it may be more advantageously applied to the high frequency impact experiment.

Referring to FIG. 3, the rotating body 150 is driven by a frictional force with the belt 250, and the lifting body 150 is repeatedly moved up and down in the vertical direction (z direction) along with the driven rotation. The elastic shock bodies 155 arranged along the outer periphery of the rotary body 150 follow a rotational trajectory around the rotation shaft 142, and each elastic impact body 155 has a bottom dead center (belt 250) of the rotation trajectory. When passing through the surface (above the surface), the separation distance between the belt 250 and the rotating shaft 142 becomes the maximum, and the rotating shaft 142 to the rotating body 150 rise vertically from the belt 250. . Thereafter, the rotating body 150 starts to descend from the rising position, and re-elevates again as the following elastic shock body 155 passes through the bottom dead center.

The rotation bar 130 is repeatedly moved up and down about the hinge axis 141 according to the movement of the rotary body 150. That is, the rotation bar 130 is repeatedly moved up and down following the rotation shaft 142 of the second position, with respect to the hinge shaft 141 of the first position.

The pivot bar 130 may be elastically coupled to the second vertical frame 112 at a third position between the first and second positions. The second vertical frame 112 extends along the vertical direction from the horizontal support 110 and may extend in pairs. An elastic member 180 is installed on the second vertical frame 112. For example, the elastic member 180 may be provided as a coil spring having a proper elastic modulus.

A mounting part 135 protruding from the pivoting bar 130 may be provided at a position corresponding to the second vertical frame 112, and the seating part 135 is laterally moved from both sides of the pivoting bar 130. Protrudingly formed, the elastic member 180 may be interposed between the seating part 135 and the second vertical frame 112.

The elastic member 180 has one end fixed to the seating part 135 and the other end fixed to the second vertical frame 112, and moves vertically (z direction) between the seating part 135 and the vertical frame 112. Depending on the stretch and compression will be repeated.

The elastic member 180 performs a damper (damper) function to attenuate the lifting movement of the rotation bar 130. That is, the elastic member 180 may function to attenuate the oscillation vibration of the rotation bar 130 due to the repulsion of the elastic impact member 155. The elastic member 180 suppresses the vibration of the rotation bar 130 while being stretched / compressed as the lifting bar 130 moves up and down, and prevents the shock that may be generated due to excessive swinging of the rotation bar 130. . By appropriately matching the elastic modulus of the elastic member 180 together with the elastic impact member 155, the resonance frequency of the entire durability test apparatus can be moved to a region far from probable experimental conditions.

As the elastic impact member 155, a tire member is used, but the present invention is not limited thereto and various kinds of elastic bodies may be applied. Since the tire member exhibits equivalent isotropic elastic properties in all directions, strict process control is not required for assembling the elastic impact member 155, and despite excessive tolerances, the tire member is excessively necessary for the test object 200 (treadmill). Avoid shock.

Together with the elastic impact member 155, the elastic member 180 for elastically coupling the pivoting bar 130 to the frame 112 cooperate with each other to design and process a wide margin of the overall durability test apparatus 100 Make it widely acceptable.

For example, in a 1-axis translational impact device, the motion trajectory of the impact source is directly controlled by a drive mechanism (e.g., a crank-slider mechanism), and since the motion trajectory of the impact source is entirely dependent on the drive mechanism, Impact devices need to be designed and machined precisely. In contrast, in the proposed structure, the rotating body 150 including the impact body 155 is pivotally mounted around the hinge shaft 141, and the rotating body 150 is framed through the elastic member 180. Since it is elastically coupled to 112, even if some errors are allowed in the design or in the assembly process, there is less malfunction such as excessive shock or no impact at all.

The durability test apparatus 100 may include a variety of sensors for detecting the data required during the impact test for the performance evaluation of the test target 200 (treadmill). For example, the durability test apparatus 100 may include a temperature sensor, an acceleration sensor, and a driving signal sensor.

For example, the temperature sensor measures frictional heat generated between the endless belt 250 and the deck 260 wrapped around the deck 260 of the treadmill 200. For example, if the frictional heat measured from the temperature sensor rises above a certain standard, the product is determined to be defective. Thus, there is a need to redesign the combination of belt 250 and deck 260.

On the other hand, it is possible to evaluate the vibration absorption characteristics of the treadmill 200 through the acceleration sensor. The accelerometer measures the amount of product by evaluating how quickly the transmitted shock cancels when an impact is transmitted on the belt 250, that is, when the elastic impactor 155 strikes the belt 250. Defect is determined.

For example, the accelerometer may be attached to a deck 260 which does not overlap the belt 250, and the accelerometer is attached to a plurality of locations, for example, four corners, and the plurality of accelerometers. The accuracy of the evaluation can be determined by combining the output signals from the system.

The driving signal sensor detects a driving signal, thereby evaluating the operational stability of the treadmill 200. That is, the driving signal sensor 200 outputs a waveform change of the driving current due to the impact when an impact is transmitted on the belt 250, that is, when the elastic shock body 155 strikes the belt 250. do. The drive signal sensor evaluates the change in waveform during impact to determine the product's quantity / defect. For example, if the peak value of the driving current at the time of impact on the belt 250 is detected as more than the allowable, the driving stability of the product can be evaluated to fall below the acceptance criteria.

100: durability test device 110: horizontal support
111: first vertical frame 112: second vertical frame
113: first reinforcement frame 114: second reinforcement frame
115: third reinforcement frame 118: feed roller
130: rotation bar 135: seating portion
141: hinge axis 142: rotation axis
150: rotating body 151: first rotating plate
152: second rotating plate 155: elastic impactor
157: fastener 158: bearing
170: post 180: elastic member
200: test subject (treadmill) 250: treadmill belt
260: deck of treadmills

Claims

frame;
A rotation bar having one end hinged to one side of the frame;
A rotary shaft fitted to the other end of the pivot bar; And
And a rotating body including a plurality of elastic impact bodies arranged about the rotation axis, circulatingly driven about the rotation axis, and hitting a test object.
The rotating body includes first and second rotating plates spaced apart from each other in the rotation axis direction,
1 group of elastic impactor fastened to the first rotating plate, and 2 groups of elastic impactor fastened to the second rotating plate is fastened in a mutually staggered position, characterized in that to alternate the price of the test object.

delete

The method of claim 1,
The elastic impactor is a durability test device, characterized in that fastened to the symmetrical position of the first, second rotating plate about the rotation axis.

The method of claim 3,
The elastic impactor is a durability test device, characterized in that arranged at the vertex position of the equilateral triangle having a center of the rotation axis.

The method of claim 1,
The elastic impactor is a durability test device, characterized in that the tire member.

The method of claim 1,
The test object is a durability test device, characterized in that the treadmill.

The method of claim 6,
The rotating body is in close contact with the belt of the treadmill durability test apparatus, characterized in that driven driven about the rotating shaft with the progress of the belt.

The method of claim 7, wherein
Durable testing device, characterized in that the elastic impact member after the outer periphery of the rotating body is sequentially rubbed contact on the belt and pushed in the direction of the belt.

The method of claim 1,
The pivoting bar is a durability test apparatus characterized in that the reciprocating driving in the clockwise / counterclockwise direction by following the movement of the rotary shaft of the other end centered on one hinge axis.

10. The method of claim 9,
The rotation bar is characterized in that the durability test device characterized in that the elastically coupled to the frame.

The method of claim 10,
The rotation bar is a durability test device, characterized in that coupled to the frame via an elastic member at a position between the hinge axis and the rotation axis.

The method of claim 11,
The elastic member is a durability test device, characterized in that the coil spring having one end coupled to the pivot bar and the other end coupled to the frame.

The method of claim 1,
The frame includes:
Horizontal support on which the test object is placed;
A first vertical frame extending upward on the horizontal support and coupled with a hinge axis of the pivoting bar; And
And a second vertical frame extending upward on the horizontal support, the second vertical frame being interposed to the pivoting bar via an elastic member.

The method of claim 13,
Each of the first and second vertical frames includes a pair of first and second vertical frames extending parallel to each other;
The pivoting bar forms a hinge coupling with the pair of first frames, and forms an elastic coupling with the pair of second frames.
And the rotating body is rotatably supported between the pair of pivot bars.

The method of claim 1,
Durable test apparatus, characterized in that the rotating bar is formed with a post to which the weight member is fitted.

16. The method of claim 15,
And the post is formed coaxially with the rotation shaft.

The method of claim 1,
Durability test apparatus, characterized in that for further evaluating the performance of the test object, the sensor for detecting the impact test data.

18. The method of claim 17,
Durability test apparatus comprising at least one of a temperature sensor, an acceleration sensor and a drive signal sensor.

19. The method of claim 18,
The temperature sensor is a durability test device, characterized in that for detecting the frictional heat between the belt of the track and the deck surrounded by the belt.

19. The method of claim 18,
The acceleration sensor is a durability test device, characterized in that for detecting the vibration absorption performance of the test object in response to the impact of the elastic impactor.

19. The method of claim 18,
And the drive signal sensor detects a change in waveform of a drive signal in response to a collision of the elastic impactor.