A vibration test fixture

Abstract

The invention discloses a vibration test fixture, comprising a device body and a vibration rod, a cavity is opened in the middle of the device body, a first bevel gear, a second bevel gear and a main bevel gear are arranged in the cavity, the first bevel gear and the second bevel gear are symmetrically rotatably installed on two opposite inner walls of the cavity, the main bevel gear is rotatably installed between the first bevel gear and the second bevel gear, and meshes with the first bevel gear and the second bevel gear; guide holes are symmetrically opened on the left and right sides of the device body, a tension rod is rotatably arranged in the guide hole, one end of the tension rod passes through the device body and is fixedly connected to the middle of the first bevel gear or the second bevel gear, and the vibration rod is fixedly installed on the bottom of the device body by screws; the invention has a simple structure and is easy to operate, and can provide a test environment with coaxial, symmetrical, self-centering, locking and other structural functions for vibration tests.

Description

Technical Field

[0001] The present invention relates to the technical field of tooling fixtures, and more particularly to a vibration test tooling fixture. Background Art

[0002] Vibration test is used to evaluate the vibration resistance of equipment in its expected transportation and use environment. The purpose is to find defects in product design, process, and manufacturing, and fully understand the product stress response characteristics and weak links to determine whether the product is qualified. The fixture is one of the key parts of the vibration test. The fixture design is a complex project, and the quality of the fixture design will directly affect the test results.

[0003] Under the conditions determined by the blade test piece and the test equipment, the reasonable design of the fixture that meets the requirements of the vibration environment test is related to whether the test can be carried out smoothly and the credibility of the results. As the size and weight of the blade test piece increase, the difficulty of fixture design is also increasing.

[0004] Therefore, how to provide a vibration test fixture is a problem that technical personnel in this field need to solve urgently. Summary of the invention

[0005] The present invention provides a vibration test fixture, aiming to solve the above technical problems in the prior art to a certain extent.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A vibration test fixture comprises a device body and a vibration rod, a cavity is opened in the middle of the device body, a first bevel gear, a second bevel gear and a main bevel gear are arranged in the cavity, the first bevel gear and the second bevel gear are symmetrically rotatably mounted on two opposite inner walls of the cavity, the main bevel gear is rotatably mounted between the first bevel gear and the second bevel gear, and meshes with the first bevel gear and the second bevel gear; guide holes are symmetrically opened on the left and right sides of the device body, a tension rod is rotatably arranged in the guide hole, one end of the tension rod passes through the device body and is fixedly connected to the middle of the first bevel gear or the second bevel gear, and the vibration rod is fixedly mounted on the bottom of the device body by screws.

[0008] Furthermore, it also includes a driving rod and a locking nut, one end of the driving rod passes through the outer wall of the device body and is fixedly connected with the main bevel gear, the driving rod is provided with a thread, the locking nut is sleeved on the driving rod and is threadedly connected with the driving rod, and the inner side of the nut is in contact with the outer wall of the device body.

[0009] Furthermore, one end inside the guide hole is an inverted cone structure with a gradually decreasing diameter.

[0010] Furthermore, an angle α between a cross section at one end of the guide hole and a horizontal line is 45°.

[0011] Furthermore, the device body is made of aluminum-magnesium alloy, which has good damping properties and is easy to process.

[0012] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a vibration test fixture which has a simple structure and is easy to operate and can provide a test environment for vibration tests with coaxial, symmetrical, self-centering, locking and other structural functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0015] Figure 2 It is a partial cross-sectional view of the present invention.

[0016] Figure 3 It is a half-section schematic diagram of the present invention.

[0017] in:

[0018] 1-device body; 2-vibration rod; 3-first bevel gear; 4-second bevel gear; 5-main bevel gear; 6-guide hole; 7-tension rod; 8-drive rod; 9-locking nut. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0024] The embodiment of the present invention discloses a vibration test fixture, including a device body 1 and a vibration rod 2. The device body 1 is made of aluminum-magnesium alloy. A cavity is opened in the middle of the device body 1, and a first bevel gear 3, a second bevel gear 4 and a main bevel gear 5 are arranged in the cavity. The first bevel gear 3 and the second bevel gear 4 are symmetrically mounted on two opposite inner walls of the cavity. The main bevel gear 5 is rotatably mounted between the first bevel gear 3 and the second bevel gear 4, and meshes with the first bevel gear 3 and the second bevel gear 4; guide holes 6 are symmetrically opened on the left and right sides of the device body 1, and a tension rod 7 is coaxially rotatably arranged in the guide hole 6, and one end of the tension rod 7 passes through the device body 1 and is fixedly connected to the middle of the first bevel gear 3 or the second bevel gear 4; the vibration rod 2 is fixedly mounted on the bottom of the device body 1 by screws.

[0025] It also includes a driving rod 8 and a locking nut 9. One end of the driving rod 8 passes through the outer wall of the device body 1 and is fixedly connected to the main bevel gear 5. The driving rod 8 is provided with a thread. The locking nut 9 is sleeved on the driving rod 8 and is threadedly connected to the driving rod 8. The inner side of the locking nut 9 contacts the outer wall of the device body 1.

[0026] Advantageously, one end of the inner portion of the guide hole 6 is an inverted cone structure with a gradually decreasing diameter, and the angle α between the cross section and the horizontal line is 45°, which limits the insertion depth of the test piece and is suitable for test pieces of various sizes.

[0027] The fixture of the present invention can provide a test environment with coaxial, symmetrical, self-centering, locking, anti-loosening and other functions for vibration test. The working principle is as follows:

[0028] First, insert the vibration rod into the vibration device, fix the direction, lock and prevent it from loosening, then insert the mounting shaft of the blade test piece into the guide hole, and use the conical structure at one end of the guide hole to limit the insertion depth of the test piece. The installation symmetry is ≤0.02mm (the coaxiality and symmetry of the test piece installation are mainly guaranteed by the processing dimensions of the test tooling). At this time, the tension (anti-centrifugal force) edge of the test piece has reached the effective position of the left / right pull rod. Loosen the locking nut, manually use the torque wrench to twist the main bevel gear in the forward direction to drive the bevel gears on both sides to work, and rotate the two tensioning rods to tighten the mounting shaft of the test workpiece through a threaded connection until the torque value required for the actual installation is reached. Manually tighten the locking nut, bond the acceleration sensor, and conduct tests according to corresponding technical requirements.

[0029] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0030] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vibration test fixture, characterized in that: The invention comprises a device body (1) and a vibration rod (2); a cavity is provided in the middle of the device body (1); a first bevel gear (3), a second bevel gear (4), a main bevel gear (5), a driving rod (8) and a locking nut (9) are arranged in the cavity; the first bevel gear (3) and the second bevel gear (4) are symmetrically mounted on two opposite inner walls of the cavity; the main bevel gear (5) is rotatably mounted between the first bevel gear (3) and the second bevel gear (4) and meshes with the first bevel gear (3) and the second bevel gear (4); guide holes (6) are symmetrically provided on the left and right sides of the device body (1) , a tension rod (7) is rotatably arranged in the guide hole (6), one end of the tension rod (7) passes through the device body (1) and is fixedly connected to the middle part of the first bevel gear (3) or the second bevel gear (4); the vibration rod (2) is fixedly mounted on the bottom of the device body (1) by means of screws; one end of the drive rod (8) passes through the outer wall of the device body (1) and is fixedly connected to the main bevel gear (5), the drive rod (8) is provided with a thread, the lock nut (9) is sleeved on the drive rod (8) and is threadedly connected thereto, and the inner side of the lock nut (9) is in contact with the outer wall of the device body (1); One end of the guide hole (6) is an inverted cone structure with a gradually decreasing diameter; The included angle α between the cross section at one end inside the guide hole (6) and the horizontal line is 45°.

2. A vibration test fixture according to claim 1, characterized in that: The material of the device body (1) is aluminum-magnesium alloy.

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