Lower guide column structure suitable for small electric vibration table

Abstract

The utility model discloses a lower guide pillar structure suitable for a small electric vibration table, which comprises a lower guide pillar body, an integrated sliding bearing and a bearing fixing seat, the integrated sliding bearing is arranged outside the upper part of the lower guide pillar body, and the bearing fixing seat is arranged above the integrated sliding bearing. The lower guide pillar body and the bearing fixing seat which are connected through the integrated sliding bearing are connected through the sliding bearing, guiding errors caused by abrasion of balls in the rolling wheel are effectively avoided, guiding precision is improved, machining is facilitated, and meanwhile materials and machining cost are saved.

Description

Technical Field

[0001] This utility model belongs to the technical field of vibration table equipment, specifically relating to a lower guide column structure suitable for small electric vibration tables. Background Technology

[0002] An electromagnetic vibration table is a vibration testing device driven by electromagnetic force, widely used in electronics, automotive, aerospace, and other fields to simulate complex and variable vibration environments, thereby testing the durability and reliability of products under vibration conditions. Its core working principle is to generate vibration force through the interaction between an electromagnetic coil and a moving coil: when the electromagnetic coil is energized, the current generates a stable magnetic field within it, driving the coupled moving coil to produce controlled reciprocating motion within this magnetic field, thus causing the table surface to vibrate. By precisely adjusting the frequency, waveform, and amplitude of the input current, the vibration table can flexibly generate vibrations of different frequencies and amplitudes, suitable for various testing needs, such as simulating vibrations during transportation or testing the vibration resistance performance of equipment in extreme environments.

[0003] The lower guide system plays a crucial guiding and stabilizing role throughout the vibration table's operation, ensuring its vertical movement is in the designated direction and preventing lateral deviation or tilting, thus guaranteeing vibration accuracy. This system reduces mechanical wear by distributing friction, extending equipment lifespan. Simultaneously, it shares some of the load, reducing pressure on the main drive components and enhancing system efficiency and stability. Under high-frequency vibration or complex operating conditions, the lower guide system improves the vibration table's accuracy and durability, ensuring smooth operation under high loads.

[0004] Currently, most vibration table manufacturers use roller-type or cylindrical bearing-type lower guide columns. Using a roller structure not only complicates the parts manufacturing process, but also affects vibration accuracy as the rollers wear down. While using a cylindrical bearing structure reduces the difficulty of parts manufacturing, the fixing structure between the lower guide column and the moving coil has lower strength, making it less stable than a roller-type structure. Furthermore, its torsional resistance is poor, affecting guiding accuracy and causing errors in vibration results. Among existing bearing-guided structures, there is also a guide structure using a hydraulic oil supply system. While this structure offers good guiding accuracy, it is more complex, carries the risk of oil leakage, and occupies a large space, making it impossible to place an air spring underneath, resulting in a lack of supporting components and poor stability. Utility Model Content

[0005] The purpose of this invention is to provide a lower guide column structure suitable for small electric vibration tables, so as to solve the problems mentioned in the background art.

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

[0007] A lower guide column structure suitable for a small electric vibration table includes a lower guide column body, an integrated sliding bearing, and a bearing mounting base. The integrated sliding bearing is installed on the outer surface of the upper part of the lower guide column body, and the bearing mounting base is installed on top of the integrated sliding bearing.

[0008] By adopting the above technical solution, the lower guide column body and the bearing fixing seat are connected by an integrated sliding bearing, which effectively avoids the guiding error caused by the wear of the internal balls of the roller, improves the guiding accuracy, and saves materials and processing costs while facilitating processing.

[0009] Preferably, the integrated sliding bearing includes a bushing, a silica insulating layer, and a polytetrafluoroethylene-graphite hybrid layer. The silica insulating layer is disposed in the middle of the bushing, and the polytetrafluoroethylene-graphite hybrid layer is disposed on the inner side of the silica insulating layer. The polytetrafluoroethylene-graphite hybrid layer abuts against the lower guide post.

[0010] By adopting the above technical solution: the integrated sliding bearing consists of three parts: a bushing, a silica insulating layer, and a polytetrafluoroethylene-graphite hybrid material layer. The innermost layer, a polytetrafluoroethylene-graphite hybrid material, contacts the lower guide post. This material has excellent wear resistance and high temperature resistance. At the same time, under high-temperature friction, graphite can achieve a self-lubricating effect, which can replace the hydraulic oil supply system, eliminating the risk of oil leakage while ensuring guiding accuracy and reducing guiding errors caused by friction. The middle silica insulating layer can prevent the current generated by the excitation coil of the vibration table from interfering with the vibration data and improve guiding accuracy.

[0011] Preferably, the bushing is provided with a plurality of fastening screws evenly distributed along its circumference, and the bushing is connected to the bearing fixing seat by the fastening screws.

[0012] By adopting the above technical solution, the evenly distributed fastening screws can improve the stability of the connection between the bushing and the bearing housing, and can also make up for the poor anti-torsion function of ordinary sliding bearings.

[0013] Preferably, the surface of the bearing mounting base is provided with a plurality of pin holes evenly distributed along its circumference.

[0014] By adopting the above technical solution, the pin hole is used to connect the moving ring at the bottom of the vibration table to the bearing mounting seat, thereby improving the stability of the connection.

[0015] Preferably, the top of the lower guide post body is provided with an upper threaded hole, and the bottom of the lower guide post body is provided with a lower threaded hole.

[0016] By adopting the above technical solution: the upper threaded hole facilitates the fixing and connection of the moving coil and the lower guide post body with screws, further improving the stability of the connection; the lower threaded hole connects the air spring to the lower guide post body with screws, providing a supporting function.

[0017] The technical effects and advantages of this utility model are as follows:

[0018] 1. Replacing rolling bearings with sliding bearings avoids the decrease in testing accuracy caused by wear of roller balls and extends the service life of components; at the same time, connecting the entire bearing to the moving ring through the bearing mounting seat improves the torsional resistance of the sliding bearing.

[0019] 2. In this structure, the innermost layer of the bearing uses a polytetrafluoroethylene-graphite hybrid material that is specially designed to work with the material of the lower guide post. The application of this new material makes it not only resistant to high temperatures but also self-lubricating, thus improving its high-temperature resistance. At the same time, this hybrid material has good adhesion to the surface of steel under friction conditions and is self-lubricating, which can avoid the risk of oil leakage when using a hydraulic oil supply system. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure;

[0022] Figure 3 This is a schematic diagram of the structure of the lower guide post body in this utility model.

[0023] In the diagram: 11. Upper threaded hole; 12. Bearing mounting seat; 13. Fastening screw; 14. Bushing; 15. PTFE-graphite hybrid layer; 16. Silica insulating layer; 17. Lower guide post body; 18. Lower threaded hole; 19. Pin hole. Detailed Implementation

[0024] The following will refer to the appendix in the embodiments of this utility model. Figures 1-3 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The specific embodiments described herein are merely used to explain this utility model and are not intended to limit this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Example:

[0026] like Figures 1-3As shown, this utility model provides a lower guide column structure suitable for a small electric vibration table. The lower guide column structure includes a lower guide column body 17, an integrated sliding bearing, and a bearing fixing seat 12. In this embodiment, the lower guide column body 17 is cylindrical, eliminating the polygonal boss structure and reducing processing costs. An integrated sliding bearing is installed on the upper exterior of the lower guide column body 17, and a bearing fixing seat 12 is installed on the upper surface of the integrated sliding bearing. The lower guide column body 17 and the bearing fixing seat 12 are connected by a sliding bearing, which effectively avoids guiding errors caused by wear of the internal balls of the roller, improves guiding accuracy, and saves materials and processing costs while facilitating processing.

[0027] The integrated sliding bearing includes a bushing 14, a silica insulating layer 16, and a polytetrafluoroethylene-graphite hybrid layer 15. The silica insulating layer 16 is located in the middle of the bushing 14, and the polytetrafluoroethylene-graphite hybrid layer 15 is located inside the silica insulating layer 16. The polytetrafluoroethylene-graphite hybrid layer 15 abuts against the lower guide post body 7. The integrated sliding bearing consists of three parts: the bushing 14, the silica insulating layer 16, and the polytetrafluoroethylene-graphite hybrid material layer. The innermost layer, the polytetrafluoroethylene-graphite hybrid layer 15, contacts the lower guide post. This material has excellent wear resistance and high temperature resistance. At the same time, under high temperature friction, graphite can achieve a self-lubricating effect, which can replace the hydraulic oil supply system, eliminating the risk of oil leakage while ensuring guiding accuracy and reducing guiding errors caused by friction. The middle silica insulating layer 16 can prevent the current generated by the excitation coil of the vibration table from interfering with the vibration data and improve guiding accuracy. While ensuring guiding accuracy, it also makes up for the shortcomings of ordinary sliding bearings in terms of poor torsional resistance.

[0028] The bushing 14 is evenly provided with a number of fastening screws 13 along its circumference. The bushing 14 and the bearing fixing seat 12 are connected by the fastening screws 13. The evenly provided fastening screws 13 can improve the stability of the connection between the bushing 14 and the bearing fixing seat 12.

[0029] The surface of the bearing mounting base 12 is evenly provided with a number of pin holes 19 along its circumference. The pin holes 19 are used to connect the moving ring at the bottom of the vibration table to the bearing mounting base 12, thereby improving the stability of the connection and making up for the poor anti-torsion function of ordinary sliding bearings.

[0030] The lower guide post body 17 has an upper threaded hole 11 at the top and a lower threaded hole 18 at the bottom. The upper threaded hole 11 facilitates the fixing of the moving coil and the lower guide post body 17 with screws, further improving the stability of the connection. The lower threaded hole 18 connects the air spring to the lower guide post body 17 with screws, providing support.

[0031] In summary, this structure features high guiding accuracy, good torque resistance, and ease of manufacturing.

[0032] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lower guide column structure suitable for a small electric vibration table, characterized in that: It includes a lower guide post body (17), an integrated sliding bearing and a bearing mounting seat (12). The integrated sliding bearing is installed on the outside of the upper part of the lower guide post body (17), and the bearing mounting seat (12) is installed on the upper part of the integrated sliding bearing.

2. The lower guide column structure suitable for a small electric vibration table according to claim 1, characterized in that: The integrated sliding bearing includes a bushing (14), a silica insulating layer (16), and a polytetrafluoroethylene-graphite hybrid layer (15). The silica insulating layer (16) is disposed in the middle of the bushing (14), and the polytetrafluoroethylene-graphite hybrid layer (15) is disposed on the inner side of the silica insulating layer (16). The polytetrafluoroethylene-graphite hybrid layer (15) abuts against the lower guide post body (17).

3. The lower guide column structure suitable for a small electric vibration table according to claim 2, characterized in that: The bushing (14) is provided with a plurality of fastening screws (13) evenly arranged along its circumference, and the bushing (14) and the bearing fixing seat (12) are connected by the fastening screws (13).

4. The lower guide column structure suitable for a small electric vibration table according to claim 1, characterized in that: The surface of the bearing mounting base (12) is provided with a number of pin holes (19) evenly arranged along its circumference.

5. The lower guide column structure suitable for a small electric vibration table according to claim 1, characterized in that: The top of the lower guide post body (17) is provided with an upper threaded hole (11).

6. The lower guide column structure suitable for a small electric vibration table according to claim 1, characterized in that: The bottom of the lower guide post body (17) is provided with a lower threaded hole (18).

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