A fixing device for a high-precision vibration table

Abstract

This utility model relates to a high-precision vibration table fixing device in the field of vibration table equipment technology, comprising: a horizontal base plate; a 45-degree inclined shaft seat, fixedly disposed in the middle of the upper surface of the horizontal base plate, wherein the upper end surface of the shaft seat has an assembly hole in the middle, and the bottom surface of the assembly hole has two positioning mounting holes symmetrically arranged; a mounting shaft, the lower end of which is coaxially rotatably inserted into the assembly hole of the 45-degree inclined shaft seat; the upper and lower sides of the shaft seat have a 45-degree inclined surface and an axially penetrating eccentric positioning hole, respectively; this utility model, through the rotational engagement structure of the mounting shaft and the 45-degree inclined shaft seat, and the detachable connection between the eccentric positioning hole and the positioning mandrel, can realize the rapid switching of the 45-degree inclined surface of the sensor between horizontal and vertical states, thereby supporting vibration testing in the X, Y, and Z axes without disassembly and reassembly, greatly improving testing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of vibration table equipment technology, and in particular to a fixing device for a high-precision vibration table. Background Technology

[0002] A vibration table is an important piece of equipment used to simulate vibration environments and test the performance of products or sensors. During vibration testing, sensors must be reliably connected to the vibration table surface via a fixing device to ensure the accuracy and reliability of the test data.

[0003] Currently, traditional connection devices between vibration tables and sensors mostly employ a single-base plate structure, where the sensor is directly fixed to the vibration table surface using bolts. While simple, this structure has significant limitations: since the vibration table typically moves in a single axis, a single fixation can only test the amplitude-frequency characteristics of the sensor in the X and Y axes. To test the Z-axis performance, the entire base plate and sensor must be rotated 90° together. During this process, the connecting bolts between the vibration table and the base plate are prone to loosening, requiring readjustment and tightening before each test. This is not only cumbersome and inefficient but can also introduce testing errors due to inconsistent connection conditions.

[0004] To address this, we designed a high-precision fixing device for vibration tables. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model discloses a fixing device for a high-precision vibration table.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-precision vibration table fixing device includes:

[0008] Horizontal substrate;

[0009] A 45-degree inclined bearing is fixedly mounted on the middle of the upper surface of the horizontal base plate. An assembly hole is provided in the middle of the upper end surface of the bearing, and two positioning mounting holes are provided symmetrically on the bottom surface of the assembly hole.

[0010] The mounting shaft has its lower end coaxially rotatably inserted into the mounting hole of the 45-degree inclined shaft seat; the upper and lower sides of its upper end face are respectively provided with a 45-degree inclined surface and an axially penetrating eccentric positioning hole.

[0011] The positioning mandrel has its lower end coaxially passing through the eccentric positioning hole and is detachably connected to the corresponding positioning mounting hole so that the 45-degree inclined plane can be in a horizontal or vertical state.

[0012] Furthermore, the mounting shaft is rotatably connected to the mounting hole of the 45-degree inclined shaft seat via a bearing.

[0013] Furthermore, the positioning mandrel includes a stepped shaft body. The outer end of the large-diameter section of the stepped shaft body has a tapered head, which forms a first tapered surface mating structure with the large tapered section at the top of the eccentric positioning hole. The small-diameter section is provided with an external thread section and a tapered structure from the outer end to the inner end. The external thread section is threadedly mated with the internal thread section of the positioning mounting hole, and the tapered structure forms a second tapered surface mating structure with the small tapered section of the positioning mounting hole.

[0014] Furthermore, the tapered structure is composed of an outer tapered sleeve that is coaxially slidably fitted onto the small-diameter section of the positioning mandrel.

[0015] Furthermore, a butterfly spring is provided between the outer conical sleeve and the stepped surface at the inner end of the small diameter section of the positioning mandrel.

[0016] Furthermore, the small-diameter section of the positioning mandrel is provided with a retaining ring to prevent the outer cone sleeve from falling off.

[0017] Furthermore, the retaining ring is a snap ring that is snapped onto the small diameter section of the positioning mandrel or a round nut that is screwed onto the external thread section.

[0018] Furthermore, the outer edge of the horizontal substrate is provided with a plurality of through holes to facilitate its mounting on the vibration table surface via connectors.

[0019] Furthermore, the 45-degree inclined surface is provided with sensor mounting holes.

[0020] Furthermore, the horizontal base plate and the 45-degree inclined bearing are integrally formed structures.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. By setting a rotatable mounting shaft and engaging a shaft seat with a 45-degree tilt angle, and utilizing the insertion structure of an eccentric positioning hole and a positioning mandrel, the sensor mounting surface can be quickly and accurately switched between horizontal and vertical states simply by selecting different positioning mounting holes and rotating the mounting shaft. This easily achieves testing conversion in the X, Y, and Z axes. It completely avoids the cumbersome process of disassembling the entire substrate, re-aligning, and tightening as in traditional methods, greatly improving testing efficiency and eliminating the risk of loose connections caused by repeated disassembly and reassembly.

[0023] 2. The positioning mandrel adopts a double-conical surface mating structure, combined with the continuous preload of a disc spring, effectively eliminating assembly gaps between components and ensuring extremely high repeatability and connection rigidity of the sensor mounting position. This forms a stable whole between the sensor and the vibration table, significantly improving the accuracy and reliability of vibration testing, especially high-frequency vibration test data. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is the front view of the present invention;

[0026] Figure 3 This is a cross-sectional view of the present invention;

[0027] Figure 4 This is a front view of the present invention in another state;

[0028] Figure 5 This is a schematic diagram of the structure of the horizontal base plate and the 45-degree inclined bearing in this utility model;

[0029] Figure 6 This is a schematic diagram of the structure for mounting the shaft in this utility model;

[0030] Figure 7 This is a schematic diagram of the positioning mandrel in this utility model;

[0031] Figure 8 This is a schematic diagram of another structure of the positioning mandrel in this utility model.

[0032] In the diagram: 1. Horizontal base plate; 11. Through hole; 2. 45-degree inclined shaft seat; 21. Assembly hole; 22. Positioning mounting hole; 221. Internal thread section; 222. Small tapered section; 3. Mounting shaft; 31. 45-degree inclined surface; 32. Eccentric positioning hole; 321. Large tapered section; 33. Sensor mounting hole; 4. Positioning mandrel; 41. Stepped shaft body; 411. External thread section; 412. Tapered structure; 42. Tapered head; 43. External tapered sleeve; 44. Disc spring; 45. Retaining ring. Detailed Implementation

[0033] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if terms such as "upper", "lower", "front", "rear", "left", "right" indicate orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention. It should be understood that if terms such as "end", "side", "end portion", "side part", "lateral", "longitudinal", etc. indicate orientation or positional relationship, they are only corresponding to the length and width of the corresponding component. That is, "end" indicates the head and tail area in the length direction of the corresponding component, and "side part" indicates the head and tail area in the width direction of the corresponding component. They are used for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation.

[0034] Example 1, in conjunction with Appendix Figure 1-7A high-precision vibration table fixing device includes a horizontal base plate 1, a 45-degree inclined shaft seat 2, a mounting shaft 3, and a positioning mandrel 4.

[0035] The horizontal base plate 1 is a circular or rectangular plate structure, with multiple through holes 11 evenly distributed on its outer edge, which are used to fix the entire device to the vibration table surface through bolts, positioning shafts and other connecting parts.

[0036] The 45-degree inclined bearing 2 is fixedly mounted on the middle of the upper surface of the horizontal base plate 1. The upper end face of the inclined bearing 2 is provided with an assembly hole 21. The bottom surface of the assembly hole 21 is provided with two positioning mounting holes 22 in a rotationally symmetrical manner.

[0037] As needed, the 45-degree inclined bearing 2 and the horizontal base plate 1 can be integrally formed to ensure overall rigidity and stability.

[0038] The lower end of the mounting shaft 3 is coaxially inserted into the assembly hole 21 via a bearing, enabling the mounting shaft 3 to rotate relative to the inclined shaft seat 2. The upper end face of the mounting shaft 3 is provided with a 45-degree inclined surface 31, on which a sensor mounting hole 33 is provided for mounting the sensor. The upper end face of the mounting shaft 3 is provided with an axially penetrating eccentric positioning hole 32.

[0039] Furthermore, the top of the eccentric positioning hole 32 has a large conical section 321, with its large end facing outwards.

[0040] The lower end of the positioning mandrel 4 coaxially passes through the eccentric positioning hole 32 and is detachably connected to the corresponding positioning mounting hole 22.

[0041] Furthermore, the positioning mounting hole 22 is provided with an internal thread section 221 and a small tapered section 222 from the inside to the outside, wherein the large end of the small tapered section 222 faces outward.

[0042] The positioning mandrel 4 includes a stepped shaft body 41, the outer end of which has a tapered head 42. The tapered head 42 and the large tapered section 321 at the top of the eccentric positioning hole 32 form a first tapered surface mating structure to realize the positioning and clamping functions and ensure positioning accuracy and connection stability.

[0043] The positioning mandrel 4 has an external thread section 411 and a tapered structure 412 in sequence from the outer end to the inner end.

[0044] Specifically, the external thread section 411 engages with the internal thread section 221 of the positioning mounting hole 22 to connect the positioning mandrel 4 to the 45-degree inclined bearing seat 2, thereby achieving the fixing operation of the mounting shaft 3. The tapered structure 412 and the small tapered section 222 of the positioning mounting hole 22 form a second tapered surface mating structure to achieve positioning and ensure positioning accuracy.

[0045] Example 2, in conjunction with Appendix Figure 8A high-precision vibration table fixing device is provided. In Embodiment 1, the conical structure 412 and the conical head 42 are integrally formed on the stepped shaft 4, and the distance between them is fixed. Therefore, the manufacturing precision requirements are relatively high. In order to reduce the manufacturing precision of the positioning mandrel 4, this embodiment differs from Embodiment 1 in that the conical structure 412 is composed of an outer conical sleeve 43 that is coaxially slidably sleeved on the small diameter section of the positioning mandrel 4. That is, the conical structure 412 of the small diameter section of the positioning mandrel 4 is positioned by the outer conical sleeve 43 being coaxially slidably sleeved on the small diameter section of the positioning mandrel 4.

[0046] Specifically, a butterfly spring 44 is provided between the outer tapered sleeve 43 and the stepped surface of the inner end of the small diameter section of the positioning mandrel 4. The butterfly spring 44 provides the preload force of the outer tapered sleeve 43 on the small tapered section 222 and compensates for the assembly gap of the outer tapered sleeve 43. This ensures that the tapered head 42 and the large tapered section 321 are in close contact, while the outer tapered sleeve 43 can also be in close contact with the small tapered section 222.

[0047] Furthermore, the small diameter section of the positioning mandrel 4 is also equipped with a retaining ring 45 to prevent the outer tapered sleeve 43 and the disc spring 44 from falling off.

[0048] Depending on the requirements, the retaining ring 45 can be a retaining ring that snaps onto the minor diameter section of the stepped shaft 41. Alternatively, it can be a round nut that is screwed onto the externally threaded section 411 of the minor diameter section of the stepped shaft 41.

[0049] By rotating the mounting shaft 3 and inserting the positioning mandrel 4 into different positioning mounting holes 22, the 45-degree inclined plane 31 can be in a horizontal or vertical state, that is, the 45-degree inclined plane 31 is a horizontal or vertical plane, thereby realizing the rapid switching test of the sensor's three axes of X, Y, and Z without disassembly and reassembly, which significantly improves the test efficiency and accuracy.

[0050] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A fixing device for a high-precision vibration table, characterized in that, include: Horizontal substrate (1); A 45-degree inclined bearing (2) is fixedly disposed in the middle of the upper surface of the horizontal base plate (1). An assembly hole (21) is provided in the middle of its upper end surface. Two positioning mounting holes (22) are provided symmetrically on the bottom surface of the assembly hole (21). The mounting shaft (3) has its lower end coaxially rotatably inserted into the mounting hole (21) of the 45-degree inclined shaft seat (2); its upper end face has a 45-degree inclined surface (31) and an axially penetrating eccentric positioning hole (32) on its upper and lower sides respectively. The positioning mandrel (4) has its lower end coaxially passing through the eccentric positioning hole (32) and is detachably connected to the corresponding positioning mounting hole (22) so that the 45-degree inclined plane (31) is in a horizontal or vertical state.

2. The fixing device for high-precision vibration table according to claim 1, characterized in that: The mounting shaft (3) is rotatably connected to the mounting hole (21) of the 45-degree inclined shaft seat (2) via a bearing.

3. The fixing device for high-precision vibration table according to claim 1, characterized in that: The positioning mandrel (4) includes a stepped shaft body (41). The outer end of the large diameter section of the stepped shaft body (41) has a tapered head (42), which forms a first tapered surface mating structure with the large tapered section (321) at the top of the eccentric positioning hole (32). The small diameter section is provided with an external thread section (411) and a tapered structure (412) from the outer end to the inner end. The external thread section (411) is threadedly mated with the internal thread section (221) of the positioning mounting hole (22). The tapered structure (412) forms a second tapered surface mating structure with the small tapered section (222) of the positioning mounting hole (22).

4. The fixing device for high-precision vibration table according to claim 3, characterized in that: The tapered structure (412) is composed of an outer tapered sleeve (43) that is coaxially slidably sleeved on the small diameter section of the positioning mandrel (4).

5. The fixing device for high-precision vibration table according to claim 4, characterized in that: A butterfly spring (44) is provided between the outer tapered sleeve (43) and the stepped surface at the inner end of the small diameter section of the positioning mandrel (4).

6. The fixing device for high-precision vibration table according to claim 4, characterized in that: The small diameter section of the positioning mandrel (4) is provided with a retaining ring (45) to prevent the outer cone sleeve (43) from falling off.

7. A fixing device for a high-precision vibration table according to claim 6, characterized in that: The retaining ring (45) is a snap ring that is snapped onto the small diameter section of the positioning mandrel (4) or a round nut that is screwed onto the external thread section (411).

8. The fixing device for a high-precision vibration table according to claim 1, characterized in that: The horizontal substrate (1) has a plurality of through holes (11) evenly distributed on its outer edge so that it can be installed on the table surface of the vibration table by means of a connector.

9. The fixing device for a high-precision vibration table according to claim 1, characterized in that: The 45-degree inclined plane (31) is provided with a sensor mounting hole (33).

10. A fixing device for a high-precision vibration table according to claim 1, characterized in that: The horizontal base plate (1) and the 45-degree inclined bearing (2) are integrally formed structures.

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