Lead screw pair structure

Abstract

The utility model relates to the technical field of lead screw nut lubricating mechanisms, and provides a lead screw pair structure which comprises a lead screw and a nut meshed with the lead screw, an oil storage area used for storing oil is arranged on the side face of a thread of the lead screw, mutual transfer of redundant oil on the pressure side and the non-pressure side of the thread of the lead screw is achieved, a lubricating oil film is formed, and the service life of the lead screw is prolonged. Continuous lubrication is ensured, and the stability of structure operation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of screw rod and nut lubrication mechanisms, in particular to a screw rod pair structure. Background Art

[0002] The screw pair is a common mechanical structure that is widely used in various mechanical equipment. This structure consists of a screw and a nut, which can rotate relative to each other to achieve relative motion. In order to increase the service life, lubricating oil is usually added between the screw and the nut. However, as they continue to move, the grease will be consumed, and it is necessary to add grease manually regularly to maintain the lubrication effect, which affects work efficiency. At the same time, the lubrication of the screw pair is currently mainly maintained on the outside of the thread meshing surface, and the amount of grease directly added to the meshing surface is very small, resulting in poor lubrication effect. Utility Model Content

[0003] The purpose of the utility model is to provide a screw rod pair structure to solve the above technical problems, ensure continuous lubrication and improve the stability of structural operation.

[0004] The embodiment of the utility model is realized by the following technical scheme: a screw rod auxiliary structure comprises a screw rod and a nut meshed with the screw rod, and an oil storage area for storing oil is provided on the side surface of the screw rod thread teeth.

[0005] Furthermore, the oil storage area is an arc groove respectively opened on the meshing surfaces on both sides of the screw thread teeth, or the oil storage area is a through hole opened on the side surface of the screw thread teeth.

[0006] Furthermore, the oil storage area is evenly distributed along the circumferential direction on the side surface of the screw thread.

[0007] Furthermore, an oil scraper ring is connected to the end of the nut and is tightly matched with the outer circle of the screw rod for scraping off the lubricating oil on the outside of the screw rod.

[0008] Preferably, an oil storage chamber and a threaded section are arranged in the nut, and the oil storage chamber located in the middle of the nut is connected to a refueling hole, so the refueling hole is equipped with a plug, and an oil scraper ring is tightly fitted in the oil storage chamber at the end of the nut.

[0009] Preferably, the oil storage chamber is arranged into three independent sections separated by threaded sections.

[0010] Preferably, adjacent oil storage chambers are connected to each other through through holes.

[0011] The utility model has at least the following advantages and beneficial effects: by providing an oil storage area for storing oil on the meshing surface of the screw thread teeth, excess grease can be transferred between the pressure side and the non-pressure side of the screw thread teeth to form a lubricating oil film, thereby ensuring continuous lubrication and improving the stability of the structural operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 A structural schematic diagram of a screw rod pair structure provided by the utility model;

[0014] Figure 2 A cross-sectional view of a screw rod pair structure provided by the utility model;

[0015] Figure 3 For this utility model Figure 2 A partial enlarged view of the middle A;

[0016] Icon: 1-screw, 10-oil storage area, 2-nut, 20-through hole, 21-oil storage chamber, 22-threaded section, 23-fuel filling hole, 24-plug, 3-oil scraper ring. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. 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.

[0019] Example

[0020] like Figure 1-3As shown, in this embodiment, a screw rod substructure is mainly disclosed, including a screw rod 1 and a nut 2 meshing with the screw rod 1, and an oil storage area 10 for storing oil is provided on the side of the screw rod 1 thread teeth; it should be noted that the screw rod 1 can preferably be a trapezoidal thread rod or a triangular thread screw rod, and a tolerance fit is adopted between the screw rod 1 and the nut 2, and there is a fit clearance; when the amount of grease between the screw rod 1 and the nut 2 is sufficient, the root of the screw rod 1 thread teeth and the oil storage area 10 of the meshing surfaces on both sides are full of grease, and when the nut 2 is relatively moved by spinning in one direction, the screw rod 1 thread teeth on the opposite side of the relative movement of the nut 2 are the pressure side, and the other side is the non-pressure side, The grease in the oil storage area 10 on the pressure side will be brought out to the meshing surface to form a lubricating oil film, and the excess grease on the meshing surface will move to the oil storage area 10 on the non-pressure side through the gap between the threads, thereby maintaining an oil-rich state on the non-pressure side; when the nut 2 moves in the opposite direction, the oil-rich non-pressure side begins to become the pressure side, and the rich grease forms a lubricating oil film under the pressure screwing movement, and the excess grease is squeezed into the oil storage area 10 on the non-pressure side again, so that the oil storage area 10 can store part of the grease after a large amount of grease on the meshing surface is brought out, thereby meeting the lubrication needs of the screw rod 1 movement, ensuring continuous lubrication, and improving the stability of the structure operation.

[0021] Furthermore, in a specific implementation, the above-mentioned oil storage area 10 provided in the embodiment of the utility model is an arc groove respectively opened on the meshing surfaces on both sides of the screw thread teeth 1, or the oil storage area 10 is a through hole opened on the side surface of the screw thread teeth 1; specifically, the oil storage area 10 is evenly distributed circumferentially on the side surface of the screw thread teeth 1; the oil storage area 10 is a double-sided arc groove design, so that excess grease is transferred to each other through the gap between the threads, forming a lubricating oil film during movement to ensure smooth operation, and for the through hole that penetrates the thread teeth, excess grease is not only transferred to each other through the gap between the threads, but can also be directly transferred from the pressure side to the non-pressure side through the through hole, effectively ensuring that sufficient grease lubrication is maintained between the screw 1 and the nut 2 for a long time.

[0022] Furthermore, in a specific implementation, an oil scraper ring 3 is connected to the end of the nut 2 provided in the embodiment of the utility model, which is tightly matched with the outer circle of the screw rod 1 and is used to scrape off the lubricating oil on the outside of the screw rod 1; preferably, an oil storage chamber 21 and a threaded section 22 are arranged in the nut 2, and the oil storage chamber 21 located in the middle position of the nut 2 is connected with a refueling hole 23, so the refueling hole 23 is matched with a plug 24, and the oil storage chamber 21 at the end of the nut 2 is tightly matched with an oil scraper ring 3; adjacent oil storage chambers 21 are connected to each other through through holes 20; specifically, the oil storage chamber 21 can be set as three independent sections separated by threaded sections 22. ; It should be noted that, when the screw rod 1 and the nut 2 are working, a sufficient amount of lubricating oil is added to the oil storage chamber 21 in the middle position of the nut 2 from the filling hole 23, and the remaining oil storage chamber 21 is filled through the through hole 20. When the screw rod 1 and the nut 2 are relatively displaced, part of the grease will be scraped off by the scraper ring 3 and stored in the oil storage chamber 21, so that a sufficient amount of grease can be maintained between the screw rod 1 and the nut 2 to maintain the lubrication effect; the cross-arrangement of the oil storage chamber 21 and the threaded section 22 can increase the span of the screwing thread at the same screwing length, that is, at the same span, the friction resistance can be reduced.

[0023] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A screw rod pair structure, comprising a screw rod (1) and a nut (2) meshed with the screw rod (1), characterized in that: An oil storage area (10) for storing oil is provided on the side surface of the threaded teeth of the screw rod (1).

2. A screw rod pair structure according to claim 1, characterized in that: The oil storage area (10) is an arc groove respectively provided on the meshing surfaces on both sides of the thread teeth of the screw rod (1); Alternatively, the oil storage area (10) is a through hole opened on the threaded tooth side surface of the screw rod (1).

3. A screw rod pair structure according to claim 1, characterized in that: The oil storage area (10) is evenly distributed along the circumferential direction on the side surface of the threaded teeth of the screw rod (1).

4. A screw rod pair structure according to claim 1, characterized in that: The end of the nut (2) is connected to an oil scraper ring (3) which is tightly matched with the outer circle of the screw rod (1) and is used to scrape off the lubricating oil on the outside of the screw rod (1).

5. A screw rod pair structure as claimed in claim 4, characterized in that: An oil storage chamber (21) and a threaded section (22) are arranged in the nut (2); the oil storage chamber (21) located in the middle of the nut (2) is connected to a refueling hole (23); the refueling hole (23) is matched with a plug (24); and the oil scraper ring (3) is tightly matched in the oil storage chamber (21) at the end of the nut (2).

6. A screw rod assembly structure as claimed in claim 5, characterized in that: The oil storage chamber (21) is configured as three independent sections separated by the threaded sections (22).

7. A screw rod assembly structure as claimed in claim 5, characterized in that: Adjacent oil storage chambers (21) are connected to each other via through holes (20).

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