Vibration test bench and its working method

Abstract

The present invention discloses a vibration test bench and its working method. The vibration test bench includes a base main body, a platform main body, a driving mechanism, a linkage mechanism, and an amplitude adjusting member. The driving mechanism is arranged on the base main body. The amplitude adjusting member has a connecting portion and an adjusting portion. The connecting portion of the amplitude adjusting member is connected to the driving mechanism. A plurality of adjusting holes are provided on the adjusting portion of the amplitude adjusting member. One end of the linkage mechanism is connected to the adjusting holes, and the other end is connected to the platform main body. The platform main body is movably connected to the base main body. This vibration test bench can freely adjust the vibration amplitude and improve the accuracy of testing.

Description

Technical Field

[0001] The present invention belongs to the field of vibration testing, and particularly relates to a vibration test bench and its working method. Background Art

[0002] A vibration test bench is a test device used to simulate the effects of a real vibration environment in a laboratory. It can be used to simulate the environment of toys, electronics, furniture, packaging, automotive parts, and other products and goods involved in transportation during the transportation process, and to detect the vibration resistance, reliability, and integrity of the product structure.

[0003] During the detection process, it is often necessary to conduct multiple comparative tests at different vibration amplitudes to avoid inaccurate testing of the test item during use. Most of the existing vibration test benches cannot freely adjust the vibration amplitude of the test bench, and thus cannot meet the test requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide a vibration test bench and its working method, which can freely adjust the vibration amplitude and improve the accuracy of testing.

[0005] The technical solution is as follows:

[0006] The vibration test bench includes a base body, a platform body, a driving mechanism, a linkage mechanism, and an amplitude adjustment member. The driving mechanism is arranged on the base body. The amplitude adjustment member has a connecting portion and an adjusting portion. The connecting portion of the amplitude adjustment member is connected to the driving mechanism. A plurality of adjustment holes are provided on the adjusting portion of the amplitude adjustment member. One end of the linkage mechanism is connected to the adjustment hole, and the other end is connected to the platform body. The platform body is movably connected to the base body.

[0007] The driving mechanism drives the amplitude adjustment member, and drives the linkage mechanism through the amplitude adjustment member, and then drives the platform body to move along the base body to simulate the vibration environment. According to the vibration amplitude required for the test, a suitable adjustment hole is selected by measurement, and the linkage mechanism is connected to the selected adjustment hole to adjust the vibration amplitude of the vibration test bench and improve the accuracy of testing.

[0008] In one embodiment, the plurality of adjustment holes are evenly distributed on the same straight line and are equidistantly arranged. According to different vibration amplitudes, different adjustment holes are used to connect with the linkage mechanism to achieve the adjustment of the vibration amplitude.

[0009] In one embodiment, a guiding mechanism is provided on the base body. The platform body is movably connected to the base body through the guiding mechanism. The setting of the guiding mechanism enables the platform body to move along the guiding direction of the base body, which is beneficial to the normal progress of the test.

[0010] In one embodiment, the base body includes a first substrate, a second substrate, a third substrate, a fourth substrate, and a fifth substrate. At least one guide rail is provided on each of the first substrate, the second substrate, the third substrate, and the fourth substrate. The plurality of guide rails are all vertically arranged, and a connecting rod is movably connected to each guide rail. The platform body is connected to the guide rails through the connecting rods, and the guide rails and the connecting rods constitute the above-mentioned guiding mechanism. When the driving mechanism drives the platform body to move, the platform body moves in the vertical direction along the guide rails to achieve the up-and-down vibration of the platform body.

[0011] In one embodiment, the fifth substrate is horizontally arranged, and the first substrate, the second substrate, the third substrate, and the fourth substrate are all vertically arranged on the fifth substrate. The first substrate and the third substrate are oppositely arranged, one side of the first substrate is connected to the second substrate, and the other side is connected to the fourth substrate. The second substrate and the fourth substrate are also oppositely arranged. A base body with a top opening and an internal movable cavity is formed among the first substrate, the second substrate, the third substrate, the fourth substrate, and the fifth substrate, and the driving mechanism is located in the movable cavity. Through the setting of the base body with a top opening and an internal movable cavity, when the platform body and the internal structure of the base body move, they are not easily affected, which is beneficial to the normal progress of the test.

[0012] In one embodiment, sliders are provided on the guide rails. The sliders are located between the connecting rods and the guide rails. The sliders are movably connected to the guide rails and fixedly connected to the connecting rods. At least two sliders are provided, and the plurality of sliders are equidistantly distributed along the guiding direction of the guide rails. The setting of the sliders reduces the friction between the connecting rods and the guide rails, which is beneficial to the movement of the connecting rods; at the same time, at least two sliders are provided, and the equidistant distribution of the plurality of sliders can improve the stability of the platform body during movement.

[0013] In one embodiment, the linkage mechanism includes a linkage frame body, a first linkage rod, and a second linkage rod. The linkage frame body is triangularly arranged. The linkage frame body has a first end, a second end, and a third end. The first end is connected to the first linkage rod, the second end is movably connected to the second linkage rod, and the third end is movably connected to the adjusting part of the amplitude adjusting member. The ends of the first linkage rod and the second linkage rod far from the linkage frame body are both movably connected to the platform body. The driving mechanism drives the amplitude adjusting member to move, thereby driving the linkage frame body to move, further driving the first linkage rod and the second linkage rod to move, so as to realize the movement of the platform body; under the action of the movable connection between the linkage frame body and the amplitude adjusting member, the fact that both the first linkage rod and the second linkage rod are movably connected to the platform body, and the guiding action of the guiding mechanism, the platform body moves up and down along the base body.

[0014] In one embodiment, a first vertical sliding bearing and a second vertical sliding bearing are provided on the platform main body. One end of the first linkage rod away from the linkage frame body is hinged to the first vertical sliding bearing, and one end of the second linkage rod away from the linkage frame body is hinged to the second vertical sliding bearing. By providing the vertical sliding bearings, the sliding friction between the linkage rods and the platform main body is reduced, and at the same time, the flexibility of the movement of the linkage rods is improved, making the movement of the platform main body smoother.

[0015] In one embodiment, the drive mechanism includes a drive motor. The drive motor has a fixed part and a drive part. The drive part is fixedly connected to the connecting part of the amplitude adjusting member. A cushion block is provided on the base main body, and the fixed part of the drive motor is installed on the cushion block. Installing the drive motor on the cushion block avoids the influence of the vibration generated during the rotation of the drive motor on the test, which is beneficial to the normal progress of the test.

[0016] The working method of the vibration test bench includes the following steps:

[0017] a. Before the vibration test bench works, the linkage mechanism is connected to the adjustment hole;

[0018] b. After the drive mechanism receives the start instruction, it starts, and the vibration test bench works;

[0019] c. The drive mechanism drives the amplitude adjusting member to move. While the amplitude adjusting member moves, it drives the linkage mechanism to move, and then drives the platform main body to move on the base main body;

[0020] d. Before the next operation of the vibration test bench, according to the test requirements, adjust the vibration amplitude of the vibration test bench. By measuring and selecting a suitable adjustment hole, the linkage mechanism is connected to the selected adjustment hole, and then repeat steps b - c.

[0021] The vibration test bench provided by the present invention can freely adjust the amplitude of up - and - down vibration, which is convenient for the test bench to conduct multiple comparative tests and improves the test accuracy; the design and installation of this vibration test bench are applicable to testing and simulating small loads, and can complete the motion states of small loads under various up - and - down vibration conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings herein show specific examples of the technical solutions of the present invention and form a part of the description of the specific implementation manners, and are used to explain the technical solutions, principles and effects of the present invention.

[0023] Unless otherwise specified or defined, in different drawings, the same reference numerals represent the same or similar technical features. For the same or similar technical features, different reference numerals may also be used for representation.

[0024] Figure 1It is a schematic diagram of the overall structure of the vibration test bench according to an embodiment of the present invention.

[0025] Figure 2 It is a schematic diagram of the structure of the linkage mechanism of the vibration test bench according to an embodiment of the present invention.

[0026] Figure 3 It is a partial schematic diagram of the guiding mechanism of the vibration test bench according to an embodiment of the present invention.

[0027] Figure 4 It is a schematic diagram of the internal structure of the vibration test bench according to an embodiment of the present invention.

[0028] Figure 5 It is a schematic diagram of the amplitude adjusting member of the vibration test bench according to an embodiment of the present invention.

[0029] Explanation of reference numerals:

[0030] 10. Base body; 11. First substrate; 12. Second substrate; 13. Third substrate; 14. Fourth substrate; 15. Fifth substrate; 20. Platform body; 30. Driving mechanism; 40. Linkage mechanism; 41. Linkage frame; 411. First end; 412. Second end; 413. Third end; 42. First linkage rod; 43. Second linkage rod; 50. Amplitude adjusting member; 51. Adjusting hole; 60. Guiding mechanism; 61. Guide rail; 62. Connecting rod; 63. Slide block; 70. First vertical sliding bearing; 71. Second vertical sliding bearing; 80. Spacer block. Detailed implementation manners

[0031] For the convenience of understanding the present invention, the specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings of the specification.

[0032] Unless otherwise specified or defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. In the case of combining the technical solutions of the present invention with the actual scenarios, all technical and scientific terms used herein may also have meanings corresponding to the purpose of implementing the technical solutions of the present invention.

[0033] Unless otherwise specified or defined, the "first, second..." used herein is only for differentiating names and does not represent a specific quantity or order.

[0034] It should be noted that when an element is considered to be "fixed to" another element, it can be directly fixed to the other element or there can be an intermediate element; when an element is considered to be "connected to" another element, it can be directly connected to the other element or there can be an intermediate element at the same time; when an element is considered to be "mounted on" another element, it can be directly mounted on the other element or there can be an intermediate element at the same time. When an element is considered to be "provided in" another element, it can be directly provided in the other element or there can be an intermediate element at the same time.

[0035] As Figures 1 to 5 As shown, a vibration test bench includes a base body 10, a platform body 20, a driving mechanism 30, a linkage mechanism 40 and an amplitude adjusting member 50. The driving mechanism 30 is provided on the base body 10. The amplitude adjusting member 50 has a connecting portion and an adjusting portion. The connecting portion of the amplitude adjusting member 50 is connected to the driving mechanism 30. A plurality of adjusting holes 51 are provided on the adjusting portion of the amplitude adjusting member 50. One end of the linkage mechanism 40 is connected to the adjusting hole 51, and the other end is connected to the platform body 20. The platform body 20 is movably connected to the base body 10. The driving mechanism 30 drives the amplitude adjusting member 50, and drives the linkage mechanism 40 through the amplitude adjusting member 50, and further drives the platform body 20 to move along the base body 10 to simulate a vibration environment; according to the vibration amplitude required by the test, a suitable adjusting hole 51 is selected by measurement, and the linkage mechanism 40 is connected to the selected adjusting hole 51 to adjust the vibration amplitude of the vibration test bench and improve the accuracy of the test.

[0036] The plurality of adjusting holes 51 are evenly distributed on the same straight line, and the plurality of adjusting holes 51 are arranged at equal intervals. The straight line formed by the adjusting holes 51 extends from the connecting portion towards the farthest edge of the amplitude adjusting member 50. According to different vibration amplitudes, different adjusting holes 51 are used to connect with the linkage mechanism 40, and the distance between the selected adjusting hole 51 and the connecting portion is used as the radius length when the linkage assembly rotates around the driving mechanism 30 to achieve the adjustment of the vibration amplitude; the farther the selected adjusting hole 51 is from the connecting portion, the greater the vibration amplitude of the test bench.

[0037] The base body 10 includes a first substrate 11, a second substrate 12, a third substrate 13, a fourth substrate 14, and a fifth substrate 15. Two guide rails 61 are provided on each of the first substrate 11, the second substrate 12, the third substrate 13, and the fourth substrate 14. The two guide rails 61 are spaced apart and flush with each other, and all the guide rails 61 are vertically arranged. A connecting rod 62 is movably connected to each of the guide rails 61. The platform body 20 is connected to the guide rails 61 through the connecting rod 62. The connecting rod 62 is fixedly connected to the side of the platform body 20 close to the base body 10, and the connecting rod 62 is perpendicular to the platform body 20. The guide rails 61 and the connecting rod 62 constitute a guiding mechanism 60. When the driving mechanism 30 drives the platform body 20 to move, the platform body 20 moves in the vertical direction along the guide rails 61 to realize the up-and-down vibration of the platform body 20. By providing the guide rails 61 on each substrate to guide the platform body 20, the platform body 20 can be kept horizontal, avoiding the platform from tilting due to uneven force. Setting two guide rails 61 can enhance the stability of the platform body 20 during up-and-down movement.

[0038] A slider 63 is provided on the guide rail 61. In this embodiment, the slider 63 is a linear bearing. The slider 63 is located between the connecting rod 62 and the guide rail 61. The slider 63 is movably connected to the guide rail 61 and fixedly connected to the connecting rod 62. The setting of the slider 63 reduces the friction between the connecting rod 62 and the guide rail 61, which is beneficial to the movement of the connecting rod 62. At least two sliders 63 are provided, and the multiple sliders 63 are equally spaced along the guiding direction of the guide rail 61. In this embodiment, two sliders 63 are provided, which can improve the smoothness of the platform body 20 during movement.

[0039] The fifth substrate 15 is horizontally arranged. The first substrate 11, the second substrate 12, the third substrate 13, and the fourth substrate 14 are all vertically arranged on the fifth substrate 15. The first substrate 11 and the third substrate 13 are oppositely arranged. One side of the first substrate 11 is connected to the second substrate 12, and the other side is connected to the fourth substrate 14. The second substrate 12 and the fourth substrate 14 are also oppositely arranged. The first substrate 11, the second substrate 12, the third substrate 13, the fourth substrate 14, and the fifth substrate 15 form a base body 10 with an open top and an internal movable cavity, and the driving mechanism 30 is located in the movable cavity. By providing the base body 10 with an open top and an internal movable cavity, when the platform body 20 and the internal structure of the base body 10 move, they are not easily affected, which is beneficial to the normal progress of the test.

[0040] The driving mechanism 30 includes a driving motor. In this embodiment, the rotational movement of the driving motor is an approximate sine wave movement, which can approximately simulate the law of the vertical fluctuation of the human body's center of gravity. The driving motor has a fixed part and a driving part. The driving part is fixedly connected to the connecting part of the amplitude adjusting member 50. A cushion block 80 is installed on the base body 10, and the fixed part of the driving motor is installed on the cushion block 80. Installing the driving motor on the cushion block 80 can avoid the influence of the vibration generated during the rotation of the driving motor on the test, which is beneficial to the normal progress of the test.

[0041] The linkage mechanism 40 includes a linkage frame body 41, a first linkage rod 42, and a second linkage rod 43. The linkage frame body 41 is arranged in a triangle. The linkage frame body 41 has a first end 411, a second end 412, and a third end 413. The first end 411 is hinged to the first linkage rod 42, the second end 412 is hinged to the second linkage rod 43, and the third end 413 is hinged to the adjusting hole 51 on the adjusting part of the amplitude adjusting member 50. The ends of the first linkage rod 42 and the second linkage rod 43 far from the linkage frame body 41 are both movably hinged to the platform body 20. The third end 413 of the linkage frame body 41 is connected to the selected adjusting hole 51 and makes a circular motion with the driving part of the driving motor as the center. Through the first linkage rod 42 and the second linkage rod 43 being hinged to the linkage frame body 41, the rotational movement of the driving motor is converted into a linear movement. The driving mechanism 30 drives the amplitude adjusting member 50 to move, thereby driving the linkage frame body 41 to move, further driving the first linkage rod 42 and the second linkage rod 43 to move up and down and swing left and right. Under the guiding action of the guiding mechanism 60, the platform body 20 does not tilt forward and backward or left and right, but can only move up and down.

[0042] A first vertical sliding bearing 70 and a second vertical sliding bearing 71 are provided on the platform body 20. The end of the first linkage rod 42 far from the linkage frame body 41 is hinged to the first vertical sliding bearing 70, and the end of the second linkage rod 43 far from the linkage frame body 41 is hinged to the second vertical sliding bearing 71. By providing the vertical sliding bearings, the sliding friction between the linkage rod and the platform body 20 is reduced, and at the same time, the flexibility of the movement of the linkage rod is improved, making the movement of the platform body 20 smoother.

[0043] The working method of the vibration test bench includes the following steps:

[0044] a. Before the vibration test bench works, connect the third end 413 of the linkage frame body 41 of the linkage mechanism 40 to one of the adjusting holes 51;

[0045] b. After the driving mechanism 30 receives the start command, it starts, and the vibration test bench works;

[0046] c. The rotating shaft of the drive motor rotates, driving the amplitude adjustment member 50 to rotate. While the amplitude adjustment member 50 rotates, the third end portion 413 of the linkage body 41 makes a circular motion with the rotating shaft of the drive motor as the center and the distance from the selected adjustment hole 51 to the rotating shaft of the drive motor as the radius. The first linkage rod 42 and the second linkage rod 43 move along with the linkage body 41. Under the guiding action of the guiding mechanism 60, the platform main body 20 moves up and down;

[0047] d. Before the next operation of the vibration test bench, adjust the vibration amplitude of the vibration test bench according to the test requirements. By measuring and selecting a suitable adjustment hole 51, connect the third end portion 413 of the linkage body 41 to the selected adjustment hole 51, and then repeat steps b - c.

[0048] The vibration test bench provided by the present invention can freely adjust the amplitude of the up - and - down vibration of the test bench by connecting different adjustment holes 51 on the amplitude adjustment member 50, which is convenient for the test bench to conduct multiple comparative tests and improves the test accuracy; the design and installation of this vibration test bench are suitable for testing and simulating small loads, and can complete the motion states of small loads under various up - and - down vibration conditions. For example, when a person walks, the state of the load backpack vibrating up and down with the center of gravity.

[0049] The purpose of the above embodiments is to exemplarily reproduce and deduce the technical solutions of the present invention, and to completely describe the technical solutions, purposes and effects of the present invention. The purpose is to make the public understand the disclosed content of the present invention more thoroughly and comprehensively, and it does not limit the protection scope of the present invention.

[0050] The above embodiments are not an exhaustive list of the present invention. In addition, there may be multiple other embodiments not listed. Any substitution and improvement made on the basis of not violating the concept of the present invention fall within the protection scope of the present invention.

Claims

1. Vibration test bench, characterized in that, It includes a base body, a platform body, a driving mechanism, a linkage mechanism and an amplitude adjusting member. The driving mechanism is arranged on the base body. The amplitude adjusting member has a connecting portion and an adjusting portion. The connecting portion of the amplitude adjusting member is connected to the driving mechanism. A plurality of adjusting holes are provided on the adjusting portion of the amplitude adjusting member. One end of the linkage mechanism is connected to the adjusting hole, and the other end is connected to the platform body. The platform body is movably connected to the base body; The linkage mechanism includes a linkage frame body, a first linkage rod and a second linkage rod. The linkage frame body is arranged in a triangular shape. The linkage frame body has a first end portion, a second end portion and a third end portion. The first end portion is connected to the first linkage rod. The second end portion is movably connected to the second linkage rod. The third end portion is movably connected to the adjusting portion of the amplitude adjusting member. One ends of the first linkage rod and the second linkage rod away from the linkage frame body are both movably connected to the platform body; A guiding mechanism is provided on the base body. The platform body is movably connected to the base body through the guiding mechanism; The base body includes a first substrate, a second substrate, a third substrate, a fourth substrate and a fifth substrate. At least one guide rail is provided on each of the first substrate, the second substrate, the third substrate and the fourth substrate. A plurality of the guide rails are all arranged vertically. A connecting rod is movably connected to each of the guide rails. The platform body is connected to the guide rails through the connecting rods. The guide rails and the connecting rods constitute the above-mentioned guiding mechanism; Sliders are provided on the guide rails. The sliders are located between the connecting rods and the guide rails. The sliders are movably connected to the guide rails. The sliders are fixedly connected to the connecting rods. At least two sliders are provided. A plurality of the sliders are evenly distributed at equal intervals along the guiding direction of the guide rails.

2. The vibration test bench according to claim 1, wherein, A plurality of the adjusting holes are evenly distributed on the same straight line, and a plurality of the adjusting holes are arranged at equal intervals.

3. The vibration test bench according to claim 1, wherein, The fifth substrate is arranged horizontally. The first substrate, the second substrate, the third substrate and the fourth substrate are all arranged vertically on the fifth substrate. The first substrate and the third substrate are arranged opposite to each other. One side of the first substrate is connected to the second substrate, and the other side is connected to the fourth substrate. The second substrate and the fourth substrate are also arranged opposite to each other. The first substrate, the second substrate, the third substrate, the fourth substrate and the fifth substrate form a base body with an open top and an internal movable cavity. The driving mechanism is located in the movable cavity.

4. The vibration test bench according to claim 1, wherein, A first vertical sliding bearing and a second vertical sliding bearing are provided on the platform body. One end of the first linkage rod away from the linkage frame body is hinged to the first vertical sliding bearing. One end of the second linkage rod away from the linkage frame body is hinged to the second vertical sliding bearing.

5. The vibration test bench according to any one of claims 1-4, characterized in that, The driving mechanism includes a driving motor. The driving motor has a fixing portion and a driving portion. The driving portion is fixedly connected to the connecting portion of the amplitude adjusting member. A cushion block is provided on the base body. The fixing portion of the driving motor is installed on the cushion block.

6. A working method of a vibration test bench, using the vibration test bench according to any one of claims 1 to 5, characterized in that, It includes the following steps: a. Before the vibration test bench works, the linkage mechanism is connected to the adjusting hole; b. After the driving mechanism receives the start instruction, it starts, and the vibration test bench works; c. The drive mechanism drives the amplitude adjustment member to move. While the amplitude adjustment member is moving, it drives the linkage mechanism to move, and then drives the platform main body to move on the base main body; d. Before the next operation of the vibration test bench, adjust the vibration amplitude of the vibration test bench according to the test requirements. Measure and select the appropriate adjustment hole, connect the linkage mechanism to the selected adjustment hole, and then repeat steps b - c.

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