Guide pillar anti-loosening structure of four-pillar hydraulic press

Abstract

According to the four-column hydraulic machine guide column anti-loosening structure, nuts are screwed to the two ends of a guide column correspondingly and used for connecting a base and a top plate of a hydraulic machine to the guide column at intervals, and pressing plates are arranged on the outer end faces of the nuts; the pressing plate fixedly connected with the top plate or the base is arranged on the end face of the nut, the nut can be effectively prevented from rotating around the axis of the guide column along the threads, the structure of an existing hydraulic machine is not changed, the structure is simple, the anti-loosening effect is good, and good practicability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of four-column hydraulic presses, in particular to a guide column anti-loosening structure for a four-column hydraulic press. Background Art

[0002] The four-column hydraulic press is a mechanical equipment that uses the static pressure of the hydraulic oil delivered by the oil pump to process metal, plastic, rubber, wood, powder and other products.

[0003] The four-column hydraulic press of the prior art, especially the large-tonnage four-column hydraulic press, is working. Figure 2 As shown, when the main hydraulic cylinder 1 drives the slider 2 with the mold installed to apply pressure to the top plate 6 with the mold also installed, the pressure generated acts on the nut 3 through the top plate 6 and the base 4 to generate a force that moves the nut 3 outward. At the same time, the guide column 5 will elastically stretch under the action of this force. When the main hydraulic cylinder 1 retreats and resets, the above pressure disappears, and the guide column 5 will also elastically recover. The alternating stress generated in this way can easily loosen the nut 3. At present, double nuts with the same or different spiral directions are generally used for anti-loosening. There is also a method of drilling threaded holes between the joint surfaces of the nut and the guide column and installing anti-loosening bolts for anti-loosening. However, when double nuts are used for anti-loosening, when the tonnage of the four-column hydraulic press is large, the alternating stress generated is large, the double nuts will still loosen, and the anti-loosening effect is not good. When the threaded holes are drilled between the joint surfaces of the nut and the guide column and the anti-loosening bolts are installed, the threads located at the joint surface of the nut and the guide column are easily damaged under the action of the above alternating stress, resulting in difficulty in disassembly and assembly. Once the nut is removed, the threaded hole often cannot be restored to the aligned state after reinstalling and tightening, and the need to drill and tap again is inefficient. Summary of the invention

[0004] The utility model aims to provide a guide column anti-loosening structure for a four-column hydraulic press to solve the problems in the prior art.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted in the present application is to provide a four-column hydraulic press guide column anti-loosening structure, wherein nuts 3 are threadedly screwed on both ends of the guide column 5 for connecting the base 4 and the top plate 6 of the hydraulic press to the guide column 5 at a distance, and a pressure plate 8 is provided on the outer end surface of the nut 3, and the pressure plate 8 is fixedly connected to the base 4 or the top plate 6 to limit the rotation of the nut 3 along the thread around the axis of the guide column 5.

[0006] Furthermore, a cavity 9 is provided at one end of the pressure plate 8 facing the nut 3 , the depth of the cavity 9 is greater than the distance from the end face of the guide column 5 to the end face on the same side of the nut 3 , and there is a gap between the inner wall of the cavity 9 and the outer periphery of the guide column 5 .

[0007] Furthermore, the pressing plate 8 is fixedly connected to the base 4 or the top plate 6 via a plurality of bolts 7 that are evenly distributed.

[0008] Furthermore, the projection area of ​​the pressure plate 8 in the axial direction of the guide pillar 5 is larger than the end surface area of ​​the nut 3 .

[0009] Furthermore, a threaded hole 10 is provided in the middle of the pressing plate 8 for screwing in a lifting eye bolt when installing and removing the pressing plate 8 .

[0010] The beneficial effects of the present application: The four-column hydraulic press guide column anti-loosening structure provided by the present application has a pressure plate fixedly connected to the top plate or the base installed on the end face of the nut, which can effectively limit the rotation of the nut along the thread around the guide column axis without changing the structure of the existing hydraulic press. It has a simple structure, good anti-loosening effect, good practicality, and can be easily and conveniently disassembled. It has the advantages of easy processing, convenience and efficiency, simple operation, safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 This is a schematic diagram of the overall structure of this application;

[0013] Figure 2 This is the main view of this application;

[0014] Figure 3 for Figure 2 Sectional view of AA in the middle;

[0015] Figure 4 for Figure 3 A partial enlarged view of point C in the middle.

[0016] Among them, the figure marks in the figure are: 1, main hydraulic cylinder; 2, slider; 3, nut; 4, base; 5, guide column; 6, top plate; 7, bolt; 8, pressure plate; 9, cavity; 10, threaded hole. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0018] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0019] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", 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 application 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 should not be understood as a limitation on the present application.

[0020] See also Figure 1~Figure 4 , the anti-loosening structure of the guide column of the four-column hydraulic press of the embodiment of the present application is now described. In the anti-loosening structure of the guide column of the four-column hydraulic press, nuts 3 are screwed on both ends of the guide column 5 to connect the base 4 and the top plate 6 of the hydraulic press to the guide column 5 at a distance, and a pressure plate 8 is arranged on the outer end surface of the nut 3, and the pressure plate 8 is fixedly connected with the base 4 or the top plate 6 to limit the rotation of the nut 3 along the thread around the axis of the guide column 5; the anti-loosening principle of the anti-loosening structure of the utility model is that when assembling the hydraulic press, the top plate 6 and the base 4 are first installed on the guide column 5, and then the nuts 3 are screwed into the threaded parts at both ends of the guide column 5 and tightened. At this time, the end faces of the nut 3 facing the top plate 6 or the base 4 are respectively pressed against the corresponding end faces of the top plate 6 or the base 4, and then the pressure plate 8 is installed To the outer end surface of the nut 3 and fixedly connected with the top plate 6 or the base 4 through the bolt 7, the pressure plate 8, the nut 3 and the top plate 6 or the base 4 are fixedly connected. At this time, on the one hand, the clamping force of the nut 3 on the top plate 6 or the base 4 is the superposition of the pressure of the threaded connection between the nut 3 and the guide column 5 and the pressure generated by the pressure plate 8, which can effectively improve the locking ability of the nut 3; on the other hand, since the pressure plate 8, the nut 3 and the top plate 6 or the base 4 are fixedly connected as an integrated structure, the nut 3 and the top plate 6 will not rotate around the guide column 5 relative to the top plate 6 or the base 4. In this way, when the hydraulic press is working, the elastic deformation (elongation or shortening recovery) generated by the guide column 5 will not cause the nut 3 to loosen, thereby achieving effective anti-loosening of the nut 3. Based on the above-mentioned arrangement, the present application installs a pressure plate fixedly connected to the top plate or the base on the end face of the nut, which can effectively limit the rotation of the nut along the thread around the axis of the guide column without changing the structure of the existing hydraulic press. It has a simple structure, good anti-loosening effect, good practicality, and can be easily and conveniently disassembled. It has the advantages of easy processing, convenience and efficiency, simple operation, safety and reliability.

[0021] Preferably, see Figure 4A cavity 9 is provided at one end of the pressure plate 8 of the guide column anti-loosening structure of the four-column hydraulic press facing the nut 3, and the depth of the cavity 9 is greater than the distance from the end face of the guide column 5 to the end face on the same side of the nut 3. There is a gap between the inner wall of the cavity 9 and the outer periphery of the guide column 5. Through the setting of the cavity 9, the pressure plate 8 does not contact the guide column 5, so that the pressure plate 8 only presses the nut 3, which increases the firmness of the connection between the pressure plate 8 and the base 4 or the top plate 6, and can better lock the nut 3.

[0022] Preferably, see Figure 1 to Figure 4 The pressure plate 8 is fixedly connected to the base 4 or the top plate 6 by a number of bolts 7 evenly arranged. Here, the bolts 7 are arranged around the circumference of the axis of the guide column 5 and outside the outer peripheral wall area of ​​the nut 3. The number can be 4 or more, and correspondingly, the top plate 6 or the base 4 is processed with an adaptive threaded hole. In this way, after assembly, the pressure force of the pressure plate 8 on the nut 3 is uniform through the bolts 7, the locking effect is good, and the stability and reliability of the anti-loosening structure are increased.

[0023] Further preferably, the projection area of ​​the pressure plate 8 in the axial direction of the guide column 5 is larger than the end face area of ​​the nut 3. The pressure plate 8 can be square, circular or other shapes without specific requirements and can be flexibly selected according to needs. The area of ​​the pressure plate 8 is larger than the area of ​​the end face of the nut 3, so that the pressure plate 8 can fix the nut 3 more firmly.

[0024] Further preferably, a threaded hole 10 is provided in the middle of the pressing plate 8 for screwing in the eye bolt when installing and removing the pressing plate 8. In this way, it is convenient to install and remove the pressing plate 8 during assembly or maintenance, saving time and effort and ensuring safety.

[0025] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A four-column hydraulic press guide column anti-loosening structure, wherein both ends of the guide column (5) are threadedly screwed with nuts (3) for connecting the base (4) and the top plate (6) of the hydraulic press to the guide column (5) at intervals, characterized in that: A pressure plate (8) is provided on the outer end surface of the nut (3), and the pressure plate (8) is fixedly connected to the base (4) or the top plate (6) to limit the rotation of the nut (3) along the thread around the axis of the guide column (5).

2. The anti-loosening structure of guide column of a four-column hydraulic press according to claim 1, characterized in that: A cavity (9) is provided at one end of the pressure plate (8) facing the nut (3); the depth of the cavity (9) is greater than the distance from the end face of the guide column (5) to the end face of the nut (3) on the same side; and a gap exists between the inner wall of the cavity (9) and the outer periphery of the guide column (5).

3. The anti-loosening structure of guide column of a four-column hydraulic press according to claim 2, characterized in that: The pressing plate (8) is fixedly connected to the base (4) or the top plate (6) via a plurality of bolts (7) evenly distributed.

4. The anti-loosening structure of guide column of a four-column hydraulic press according to claim 1, characterized in that: The projection area of ​​the pressure plate (8) in the axial direction of the guide pillar (5) is larger than the end surface area of ​​the nut (3).

5. A four-column hydraulic press guide column anti-loosening structure according to any one of claims 1 to 4, characterized in that: A threaded hole (10) is provided in the middle of the pressing plate (8) for screwing in a lifting eye bolt when installing or removing the pressing plate (8).

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