Screw nut drive oil bath lubrication system

Abstract

The utility model relates to screw nut transmission oil bath lubrication system, including screw, the screw rotation sets up on the mounting seat, be equipped with the nut on the screw, the nut upper end is equipped with the cavity shell A, the cavity shell A upper end is equipped with felt board, the nut, cavity shell A, felt board and screw cooperation form lubrication chamber A, the nut lower extreme is equipped with the cavity shell B, be equipped with the telescopic cover on the bottom plate of mounting seat, the telescopic cover upper end is connected with the cavity shell B, the nut, cavity shell B, telescopic cover, bottom plate and screw cooperation form lubrication chamber B, lubrication chamber B passes through oil circuit B and is connected with circulating oil pump, circulating oil pump passes through oil circuit A and is connected with lubrication chamber A, circulating oil pump sends the lubricating oil in lubrication chamber B into lubrication chamber A. Adopt relatively closed oil bath lubrication mode, have reasonable in structure design, dustproof effect is good, lubrication effect is good and so on advantage.

Description

Technical fields:

[0001] This utility model relates to the field of screw press technology, specifically to an oil bath lubrication system for screw and nut transmission. Background technology:

[0002] The screw press is driven by a screw and nut (e.g.) Figure 3 As shown, the screw and nut drive directly affects the slider's running accuracy and efficiency, thus the screw and nut transmission directly impacts the slider's running accuracy and efficiency. Currently, forced lubrication is mainly used for screw and nut transmissions. To achieve forced lubrication, oil passages and oil outlets (such as...) need to be machined on the nut. Figure 4 As shown in the figure, oil is supplied and lubricated through the oil pump supply circuit.

[0003] While the aforementioned lubrication methods meet lubrication requirements to some extent, they fall short in practical applications, especially when high machining precision is required. This is primarily because these methods are open-type lubrication systems, which not only fail to effectively prevent dust but also struggle to form a continuous and stable lubricating oil film at the clearance between the nut and screw. This results in limited lubrication effectiveness, low precision in the screw-nut fit, and ultimately, compromised transmission accuracy. Therefore, it is necessary to optimize and improve existing screw-nut transmission lubrication methods to enhance lubrication efficiency and transmission accuracy.

[0004] It should be noted that the above content falls within the inventor's technical knowledge and does not necessarily constitute prior art. Utility Model Content:

[0005] The purpose of this utility model is to solve the problems existing in the prior art and provide an oil bath lubrication system for screw and nut transmission. It adopts a relatively closed oil bath lubrication method and has the advantages of reasonable structural design, good dust prevention effect and good lubrication effect.

[0006] This utility model achieves the above objectives by adopting the following technical solutions:

[0007] A screw-nut drive oil bath lubrication system includes a screw rotatably mounted on a mounting base, a nut mounted on the screw, a cavity A at the upper end of the nut, a felt plate at the upper end of cavity A, the nut, cavity A, felt plate, and screw together to form a lubrication chamber A, a cavity B at the lower end of the nut, a telescopic sleeve on the base plate of the mounting base, the upper end of the telescopic sleeve being connected to cavity B, the nut, cavity B, telescopic sleeve, base plate, and screw together to form lubrication chamber B, lubrication chamber B being connected to a circulating oil pump via oil passage B, and the circulating oil pump being connected to lubrication chamber A via oil passage A, the circulating oil pump delivering lubricating oil from lubrication chamber B into lubrication chamber A.

[0008] Cavity shell A and cavity shell B are respectively installed on nuts via threaded connection A.

[0009] The felt plate is designed in a circular shape, and the inner side of the felt plate is tightly attached to the screw. The felt plate is installed on the upper end of the cavity shell A through a threaded connection B.

[0010] A liquid level sensor is provided on the cavity shell A. The liquid level sensor is connected to the controller, and the controller is connected to the circulating oil pump.

[0011] The lower end of the screw is rotatably mounted on the support sleeve via a bearing. The support sleeve is mounted on the base plate. The upper end of the support sleeve is provided with an upper end cover, and the lower end is provided with a lower end cover. The upper end cover is provided with an oil inlet channel for lubricating oil to pass through, and the lower end cover is provided with an oil outlet in the center. The oil outlet is connected to oil circuit B.

[0012] The present invention, by adopting the above-described structure, can bring the following beneficial effects:

[0013] By designing lubrication chambers A and B at the upper and lower ends of the nut respectively, a closed-loop oil bath lubrication is achieved for the gap between the screw and the nut. That is, the relative movement of the screw and nut causes the lubricating oil in lubrication chamber A to evenly coat the surfaces of the screw and nut, forming a lubricating oil film. Compared with open lubrication, it has better dust prevention and lubrication effects, can effectively reduce the transmission gap between the screw and the nut, improve the fitting accuracy, and thus improve the transmission accuracy. Attached image description:

[0014] Figure 1 This is a schematic diagram of the oil bath lubrication system for screw and nut transmission according to this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the felt board of this utility model;

[0016] Figure 3 This is a schematic diagram of an existing screw-nut drive structure;

[0017] Figure 4 This is a cross-sectional view of an existing nut;

[0018] In the diagram, 1. Screw, 2. Mounting base, 3. Nut, 4. Chamber A, 5. Felt plate, 6. Lubrication chamber A, 7. Chamber shell B, 8. Base plate, 9. Telescopic sleeve, 10. Lubrication chamber B, 11. Oil passage B, 12. Circulating oil pump A, 13. Oil passage A, 14. Liquid level sensor, 15. Controller, 16. Bearing, 17. Support sleeve, 18. Upper end cover, 19. Lower end cover, 20. Oil inlet channel, 21. Oil outlet, 22. Threaded connection A, 23. Threaded connection B, 24. Existing nut, 25. Open lubrication oil passage and oil outlet. Detailed implementation method:

[0019] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0021] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] like Figure 1-2As shown, an oil bath lubrication system for screw and nut transmission includes a screw 1, which is rotatably mounted on a mounting base 2. The screw 1 is typically vertically rotatable. A nut 3 is mounted on the screw 1, and the nut 3 is connected to a slider via a slide block or other transmission mechanism. The screw 1 drives the nut 3 to rise and fall. A cavity A4 is located at the upper end of the nut 3, and a felt plate 5 is located at the upper end of the cavity A4. The nut 3, cavity A4, felt plate 5, and screw 1 cooperate to form a lubrication chamber A6. A cavity B7 is located at the lower end of the nut 3. The mounting base 2 has a telescopic sleeve 9 on its base plate 8. The upper end of the telescopic sleeve 9 is connected to the cavity shell B7. The telescopic sleeve 9 can move up and down with the nut (i.e., it is achieved through telescopic movement). The nut 3, cavity shell B7, telescopic sleeve 9, base plate 8, and screw 1 cooperate to form a lubrication chamber B10. The lubrication chamber B10 is connected to a circulating oil pump 12 through an oil passage B11. The circulating oil pump 12 is connected to a lubrication chamber A6 through an oil passage A13. The circulating oil pump 12 delivers the lubricating oil in the lubrication chamber B10 into the lubrication chamber A6. By designing lubrication chambers A6 and B10 at the upper and lower ends of the nut 3 respectively, a closed-loop oil bath lubrication is achieved for the gap between the screw 1 and the nut 3. That is, the relative movement of the screw and nut evenly coats the surface of the screw 1 and the nut 3 with the lubricating oil in the lubrication chamber A6 to form a lubricating oil film. Compared with open lubrication, this has better dust prevention and lubrication effects, effectively reduces the transmission gap between the screw 1 and the nut 3, improves the fitting accuracy, and thus improves the transmission accuracy.

[0024] Cavity housings A6 and B10 are respectively mounted on nut 3 via threaded connection A20. Threaded connection has the advantages of reliable and secure installation, and facilitates later maintenance.

[0025] The felt plate 5 is designed in a circular shape, and its inner side is tightly attached to the screw 1. The felt plate 5 is installed on the upper end of the cavity shell A4 via a threaded connection B21. The felt plate has excellent dust absorption, filtration, and air permeability, and can meet dust prevention requirements.

[0026] A liquid level sensor 14 is installed on the housing A4. The liquid level sensor 14 is connected to the controller 15, and the controller 15 is connected to the circulating oil pump 12. The controller 15 here can be the one that comes with the screw press. The liquid level sensor 14 mainly detects the remaining amount of lubricating oil in the lubrication chamber A6. When the lubricating oil level is lower than the set level, the circulating oil pump 12 promptly delivers the lubricating oil in the lubrication chamber B10 to the lubrication chamber A6. This not only achieves circulating lubrication, but also ensures that the screw 1 and nut 2 are always lubricated by an oil bath.

[0027] The lower end of the screw 1 is rotatably mounted on a support sleeve 17 via a bearing 16. The support sleeve 17 is mounted on a base plate 8. The upper end of the support sleeve 17 is provided with an upper end cover 18, and the lower end is provided with a lower end cover 19. The upper end cover 18 has an oil inlet channel 20 for lubricating oil to pass through, and the lower end cover 19 has an oil outlet 21 at its center, which is connected to the oil passage B11. This design allows the lubricating oil in the lubrication chamber B10 to also provide closed oil bath lubrication for the bearing 16, which helps to improve the rotational accuracy of the screw 1.

[0028] The above-described specific embodiments should not be construed as limiting the scope of protection of this utility model. Any alternative improvements or modifications made to the embodiments of this utility model by those skilled in the art shall fall within the scope of protection of this utility model.

[0029] Any aspects of this utility model not described in detail are common knowledge to those skilled in the art.

Claims

1. An oil bath lubrication system for screw-nut transmission, comprising a screw, the screw being rotatably mounted on a mounting base, and a nut being mounted on the screw, characterized in that, The nut has a cavity A at its upper end, and a felt plate at its upper end. The nut, cavity A, felt plate, and screw cooperate to form a lubrication chamber A. The nut has a cavity B at its lower end. The mounting base has a telescopic sleeve on its bottom plate. The upper end of the telescopic sleeve is connected to cavity B. The nut, cavity B, telescopic sleeve, bottom plate, and screw cooperate to form lubrication chamber B. Lubrication chamber B is connected to a circulating oil pump through oil passage B. The circulating oil pump is connected to lubrication chamber A through oil passage A. The circulating oil pump delivers lubricating oil from lubrication chamber B into lubrication chamber A.

2. The oil bath lubrication system for screw and nut transmission according to claim 1, characterized in that, Cavity shell A and cavity shell B are respectively installed on nuts via threaded connection A.

3. The oil bath lubrication system for screw and nut transmission according to claim 2, characterized in that, The felt plate is designed in a circular shape, and the inner side of the felt plate is tightly attached to the screw. The felt plate is installed on the upper end of the cavity shell A through a threaded connection B.

4. The oil bath lubrication system for screw and nut transmission according to claim 3, characterized in that, A liquid level sensor is provided on the cavity shell A. The liquid level sensor is connected to the controller, and the controller is connected to the circulating oil pump.

5. The oil bath lubrication system for screw and nut transmission according to claim 1 or 4, characterized in that, The lower end of the screw is rotatably mounted on the support sleeve via a bearing. The support sleeve is mounted on the base plate. The upper end of the support sleeve is provided with an upper end cover, and the lower end is provided with a lower end cover. The upper end cover is provided with an oil inlet channel for lubricating oil to pass through, and the lower end cover is provided with an oil outlet in the center. The oil outlet is connected to oil circuit B.

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