CN114087270B

CN114087270B - Internal thread part

Info

Publication number: CN114087270B
Application number: CN202111319162.8A
Authority: CN
Inventors: 叶贵锋; 王轩; 李峰; 陈斌; 李峰峰; 崔一
Original assignee: Tianjin Jinjian Aerospace Equipment Co ltd
Current assignee: Tianjin Jinjian Aerospace Equipment Co ltd
Priority date: 2021-11-09
Filing date: 2021-11-09
Publication date: 2023-04-28
Anticipated expiration: 2041-11-09
Also published as: CN114087270A

Abstract

The utility model provides an internal thread part, which comprises an internal thread part body, wherein the internal thread part body comprises an internal thread surface provided with an internal thread structure, and a plurality of mutually independent lubricating medium flow channels are arranged in the internal thread part body; a through hole communicated with the internal thread surface is formed in the wall of the lubricating medium flow channel; the lubrication flow passage includes a lubrication inlet passage and a lubrication outlet passage. The internal thread part of the utility model can be applied to the technical field of preventing the rust and abrasion of the thread structure.

Description

Internal thread part

Technical Field

The present utility model relates to a component having an internal thread structure, such as a nut, and more particularly to the technical field of lubricating an internal thread component.

Background

Components having internal thread structures, such as nuts, typically provide a threaded engagement with externally threaded components (e.g., bolts) having external thread structures to provide a secure connection. However, there are also internally threaded members that form a kinematic pair with externally threaded members such as lead screws. Namely, in the working state, the external thread part and the internal thread part are constantly in relative rotation movement. The relative rotation movement state enables friction between the internal thread part and the external thread part to be increased sharply, and problems of abrasion, overheating and the like caused by friction greatly reduce the service lives of the internal thread part and the external thread part.

In order to reduce the abrasion between the internal thread part and the external thread part, a mode of filling lubricating oil between the internal thread part and the external thread part is adopted for solving. For example, the Chinese patent of patent number 200620036642.8, which is named as a lubrication device for screw and nut kinematic pairs on a machine tool, discloses a lubrication device for a nut and a screw. The lubricating device comprises an oil containing cylinder, and lubricating oil is injected into the oil containing cylinder. Cheng Youtong is connected with the nut, and the lead screw passes Cheng Youtong and the nut in turn, so that the lead screw brings the lubricating oil in the oil containing cylinder into a gap between the lubricating oil and the internal thread of the nut in the movement process to form a lubricating effect. The main problems of the technical scheme are as follows: friction phenomenon still exists between the screw rod and the nut, particularly when the amount of lubricating oil is small at the beginning of movement, the friction between the screw rod and the nut is still large, and metal scraps can be generated due to friction and wear; because the reciprocating motion is carried out between the screw rod and the nut, metal scraps generated by friction and abrasion flow back and forth between the oil containing cylinder and the nut along with the movement of the lubricating oil through the screw rod, and the metal scraps are accumulated continuously and participate in the friction between the screw rod and the nut, so that the friction effect is increased, and the lubricating effect is reduced.

In addition, when the internal thread part and the external thread part are locked after being assembled by pretightening force, or rust is generated between the internal thread part and the external thread part after being assembled for a certain time, the internal thread part and the external thread part are difficult to disassemble.

Disclosure of Invention

The utility model provides an internal thread part, which aims to solve the problem of large friction and abrasion between the internal thread part and a screw rod type movable part in the prior art and the problem that the internal thread part and the external thread part are blocked or corroded and are not easy to detach due to other reasons.

The technical scheme of the utility model is as follows:

an internal thread part comprises an internal thread part body, wherein the internal thread part body comprises an internal thread surface provided with an internal thread structure, and a plurality of mutually independent lubricating medium flow channels are arranged in the internal thread part body; a through hole communicated with the internal thread surface is formed in the wall of the lubricating medium flow channel; the lubrication flow passage includes a lubrication inlet passage and a lubrication outlet passage; the lubricating medium flow channel is arranged around the internal thread surface; the preparation method of the internal thread part body comprises a 3D printing method and a lamellar superposition welding method.

Optionally, the internally threaded component body includes an end face; a sealing gasket is disposed on the end face.

Optionally, a temperature adjusting medium flow passage independent from the lubricating medium flow passage is provided in the female screw member body.

Optionally, the temperature-adjusting medium flow channel is arranged helically around the inner threaded surface.

Optionally, a temperature regulating medium delivery system is provided; the temperature-adjusting medium conveying system comprises temperature-adjusting medium conveying power equipment and a temperature-adjusting medium pipeline which is communicated with the temperature-adjusting medium conveying power equipment and the temperature-adjusting medium flow channel.

Optionally, the lubrication flow passage is helically disposed around the internal thread surface.

Optionally, a lubrication delivery system is provided; the lubrication medium delivery system includes a pressure delivery device and a medium inlet line communicating the pressure delivery device and the lubrication medium inlet passage.

Optionally, a lubrication drainage system is provided; the lubrication medium discharge system includes a negative pressure discharge device and a medium discharge line communicating the negative pressure discharge device and the lubrication medium discharge passage.

Optionally, one end of the through hole, which is communicated with the internal thread surface, is arranged at the root of the tooth of the internal thread structure.

Optionally, the internally threaded component comprises a nut.

The utility model has the following technical effects:

the internal thread part of the utility model is provided with a lubricating medium inlet channel and a lubricating medium outlet channel in the internal thread part body. The lubrication medium inlet channel and the lubrication medium outlet channel are mutually independent in the body of the internal thread part and are communicated with the internal thread surface of the internal thread part. I.e. the lubrication inlet passage and the lubrication outlet passage in the body of the female part do not communicate. The lubrication medium enters the internal thread surface of the internal thread part for lubrication through the lubrication medium inlet channel and the through hole, and meanwhile, the internal thread surface is provided with the through hole communicated with the lubrication medium outlet channel. The lubrication medium on the internal thread surface is discharged through the through hole of the lubrication medium discharge passage. As can be seen from the above description of the working process, when the internal thread part and the external thread part rotate relatively, the lubricating medium residing on the internal thread surface enters from the lubricating medium inlet channel and is discharged from the lubricating medium outlet channel in a unidirectional flow mode, so that the metal scraps generated on the internal thread surface due to friction can be discharged along with the outflow of the lubricating medium, and the clean lubricating medium continuously supplemented can sufficiently lubricate the internal thread surface so as to reduce the friction between the internal thread part and the external thread part.

After the internal thread part and the external thread part are locked or rusted, the lubricating medium in the lubricating medium inlet channel is pressurized, so that the lubricating medium is injected into the joint surface of the internal thread part and the external thread part under the action of pressure, the friction force between the internal thread part and the external thread part is reduced, and the disassembly is easy to carry out.

In summary, the technical scheme of the utility model achieves the aim of the utility model.

Further effects of the above alternatives will be described below in connection with the embodiments.

Drawings

Fig. 1 is a perspective cross-sectional view of a nut body according to a first embodiment of the present utility model.

Fig. 2 is a partial sectional view showing an assembled state of a second embodiment of the present utility model.

The identification in the figures is as follows:

101. an internal thread surface; 102. a through hole; 103. a nut body; 104. a lubrication medium inlet passage; 105. a lubrication medium discharge passage;

201. a screw rod; 202. a sealing gasket; 203. a temperature adjusting medium flow passage; 204. a lubrication medium flow passage; 205. a nut body; 206. a sealing gasket; 207. and a through hole.

Detailed Description

Before the technical scheme of the present utility model is described in detail, important expressions related to the present utility model are briefly described. The female screw member according to the present utility model is a member including a female screw structure such as a nut, and includes a member having a female screw structure included in various screw-fitting mechanisms, such as a member having a female screw hole formed in a fixing base of some equipment, and other members including a female screw structure known to those skilled in the art. In this specification, reference is also made to an externally threaded member, and an internally threaded member is engaged with an externally threaded member (for example, a screw or a bolt) to form a threaded engagement structure for fastening connection or forming a kinematic pair to achieve the interconversion of linear motion and rotation. The male screw member according to the present utility model is a member having a male screw structure and is usually used in combination with a female screw member in use. The internally threaded member body according to the present utility model refers to a body of a member provided with an internally threaded structure, such as a nut body. The lubricating medium according to the present utility model is a fluid medium having a lubricating effect, for example, a lubricating medium in the form of a gas, a liquid, or a gas-liquid two-phase fluid. A typical example of a lubricating medium is lubricating oil.

The following describes the technical scheme of the present utility model in detail with reference to the embodiment shown in the drawings, in which a lubrication nut is used as an example of an internal screw member and a screw is used as an example of an external screw member.

Fig. 1 shows a specific structure of a first embodiment of the present utility model. To clearly show the structure of the lubrication nut, fig. 1 shows the internal structure of the lubrication nut in a cross-sectional manner. Fig. 1 shows half of the nut body 103 being split, in particular in the direction of the axis of the lubrication nut, from the middle of the lubrication nut. As can be seen from fig. 1, the lubrication nut body comprises an end face (the face indicated by reference numeral 103 in fig. 1, and the face of the shielded bottom opposite this face) and a female threaded face 101, on which female threaded face 101 a female threaded structure is provided. A plurality of mutually independent lubrication flow passages are provided in the nut body 103. By mutually independent, it is meant that there is no conducting structure between the lubrication flow channels inside the nut body 103, i.e. that the lubrication flowing in the different lubrication flow channels does not mix inside the nut body 103. The lubrication flow channels are again divided into two categories: one is a lubrication inlet passage 104, and the other is a lubrication outlet passage 105. The walls of the lubrication flow channels are provided with through holes 102 so that the lubrication flow channels communicate with the internally threaded surfaces 101.

The lubrication nut of the present utility model has a relatively complex internal structure, but there are available methods of manufacture in the prior art. For example, can be prepared by a 3D printing method; the preparation is carried out by a lamellar superposition welding method (similar to a layer-by-layer forming mode of 3D printing); the method of dividing the lubrication nut into an inner ring and an outer ring, respectively processing the corresponding structures, and then assembling and welding the two rings together for molding can also be adopted. This section is not repeated for these prior art methods.

A lubrication medium feeding system, not shown in the drawings, is also provided outside the nut body 103 shown in fig. 1. The lubrication medium conveying system comprises a lubrication pump and a medium inlet pipeline, wherein the medium inlet pipeline is communicated with an inlet (not shown in the figure) of the lubrication medium inlet channel 104 and the lubrication pump, and the lubrication pump generates pressure to serve as driving force to convey clean lubrication medium into the lubrication medium inlet channel 104, and then enters the internal thread surface 101 through the through hole 102 to lubricate the internal thread structure. When the lubrication medium having a certain pressure is spread on the surface of the screw structure and spread to the adjacent through hole 102 in the internal thread surface 101, the lubrication medium can enter the lubrication medium discharge passage 105 due to the pressure difference, and then be discharged. As can be seen from the description of the above process, the lubrication medium is subjected to flow lubrication in a substantially defined flow direction, and metal chips generated by the abrasion of the screw rod and the internal thread structure are also carried out by the flowing lubrication medium from the lubrication medium discharge passage 105, and are not retained at the internal thread surface 101, so that the degree of abrasion of the screw rod and the internal thread structure is reduced. Thus, the flowing lubrication medium also serves to clean the internal thread surface 101. At the same time, the continuously supplied clean lubricating medium can maintain lubrication of the internal thread face 101, thereby ensuring a continuous lubricating effect. In addition, in the following application scenarios, the lubrication nut of the utility model can also produce technical effects of solving corresponding technical problems: when the nut and the bolt are assembled by pretightening force and then locked, or rust is generated between the nut and the bolt after the nut and the bolt are assembled for a certain time, the nut and the bolt are difficult to disassemble under the two conditions. The lubricating nut can solve the problem, and the lubricating medium is pressurized to fill the joint surface of the nut and the bolt under the action of pressure, so that the friction force between the nut and the bolt is reduced, and the disassembly is easy to carry out.

In order to further ensure that the lubricating medium can flow in the aforementioned flow direction, a lubricating medium discharge system may be additionally provided. The lubrication medium discharge system includes a lubrication pump not shown in the drawing and a medium discharge line communicating with the lubrication pump, the medium discharge line also communicating with an outlet (not shown in the drawing) of the lubrication medium discharge passage 105. The lubrication pump in the lubrication system generates negative pressure to the lubrication discharge passage 105 to further increase the pressure difference between the lubrication discharge passage 105 and the internal thread surface 101, so that the power for driving the lubrication to flow is more sufficient.

Of course, in other embodiments, the lubrication delivery system and the lubrication discharge system may further communicate to form a circulation channel. A lubricant cleaning device such as a lubricant filtering device may be provided on the circulation passage. Of course, both can share the lubricant pump to further reduce cost.

The embodiment of fig. 2 further illustrates the lubrication nut of the present utility model in use, i.e., after the nut body 205 is assembled with the lead screw 201. The embodiment shown in fig. 2 is provided with a temperature-regulating medium flow channel 203 in addition to the lubricating medium flow channel 204. The temperature adjusting medium flow passage 203 and the lubricating medium flow passage 204 are independent of each other, i.e., are not communicated with each other. Also, no through hole is provided that communicates the temperature adjusting medium flow passage 203 with the female screw surface. For clarity of illustration, fig. 2 does not show a greater number of lubrication or temperature control medium flow channels. As can be seen from fig. 2, the lubricating medium flow channel 204 and the temperature-regulating medium flow channel 203 are spiral around the inner threaded surface. The broken lines in fig. 2 represent the portions of the temperature adjusting medium flow passage 203 and the lubricating medium flow passage 204, respectively, that are blocked.

A temperature regulating medium delivery system may also be provided. The temperature-adjusting medium conveying system comprises temperature-adjusting medium conveying power equipment, such as a temperature-adjusting medium conveying pump; and a temperature-adjusting medium pipe line communicating the temperature-adjusting medium transfer pump and the temperature-adjusting medium flow passage 203 so as to transfer the temperature-adjusting medium to the temperature-adjusting medium flow passage 203.

The term "temperature regulation" in the present utility model includes both cooling and heating. Namely, if the lubrication nut needs to be cooled, a temperature-adjusting medium adopts a cooling medium; if the lubrication nut needs to be heated, a heating medium is adopted as the temperature adjusting medium. The following are examples.

Since the nut body 205 and the screw 201 are frequently in a state of relative movement, a great amount of heat is generated by friction, and if the heat is not timely dissipated, more loss is generated to the nut body 205 and the screw 201. In addition, if the nut body 205 and the screw 201 have high precision requirements, an excessively high temperature may cause uncontrollable deformation of the nut body and the screw, thereby greatly reducing the precision. Although the flow of the lubricating medium can take away a part of heat, when the generated heat is large, the cooling efficiency generated by the flowing lubricating medium cannot meet the requirement, so that the temperature-adjusting medium flow channel 203 is arranged to perform more efficient heat dissipation through the flowing cooling medium. The temperature-adjusting medium flow channels 203 are provided with an inlet and an outlet, respectively, with which the aforementioned temperature-adjusting medium line communicates, and with which the outlet may also communicate with the corresponding temperature-adjusting medium discharge line. Of course, in other embodiments, the temperature-adjusting medium discharging pipeline may be connected with the temperature-adjusting medium conveying system to form a temperature-adjusting medium circulation system, which is not described herein.

In some low temperature applications, such as outdoors in severe cold regions, too low a temperature may cause adverse changes in the material properties of the nut, bolt, or screw, such as increased wear, or the metal parts may be prone to embrittlement, or reduced accuracy, or the lubrication medium may be denatured and not be effective. In this case, the temperature of the lubrication nut, the bolt, or the screw rod can be brought to a proper temperature by the flow of the heating medium by using the heating medium having fluidity, for example, hot water, so that the problems such as abrasion, embrittlement, or deterioration in accuracy can be avoided.

Sealing

washers

202 and 206 are provided on both end surfaces of the nut body 206, respectively, to reduce the possibility of the lubrication medium flowing out from the internally threaded surfaces. The end face of the internal thread part refers to an annular platform on the internal thread part body at the port of the channel formed by the internal thread surface, and the external thread part extends out of the port.

As shown in fig. 1 and 2, it can be seen that the openings at the internal thread surfaces of the through holes (through holes 102 and 207) are provided at the root portions of the teeth of the internal thread structure, so as to avoid the problem that the through holes are difficult to process and reduce the strength of the teeth at the top portions of the teeth.

The lubrication nut can be applied to other application occasions needing to lubricate the nut, such as rust prevention and the like, besides being applied to the situation of a kinematic pair formed by the nut and the screw rod.

It should be noted that the above description is only a preferred embodiment of the present utility model, and is not intended to limit the scope of the utility model, and the present utility model can be replaced by equivalent technology. It is intended that all equivalent variations in the description and illustrations of the utility model, or the direct or indirect application to other relevant art, be included within the scope of the utility model.

Claims

1. An internal thread part, includes the internal thread part body, the internal thread part body is including setting up the internal thread face of internal thread structure, its characterized in that: a plurality of mutually independent lubricating medium flow channels are arranged in the internal thread part body; a through hole communicated with the internal thread surface is formed in the wall of the lubricating medium flow channel; the lubrication flow passage includes a lubrication inlet passage and a lubrication outlet passage; the lubricating medium flow channel is arranged around the internal thread surface; the preparation method of the internal thread part body comprises a 3D printing method and a lamellar superposition welding method.

2. An internally threaded component according to claim 1, wherein: the internally threaded component body includes an end face; a sealing gasket is disposed on the end face.

3. An internally threaded component according to claim 1, wherein: a temperature adjusting medium flow passage independent of the lubricating medium flow passage is arranged in the internal thread part body.

4. An internally threaded component according to claim 3, characterized in that: the temperature adjusting medium flow passage is spirally arranged around the internal thread surface.

5. An internally threaded component according to claim 3, characterized in that: a temperature regulating medium conveying system is arranged; the temperature-adjusting medium conveying system comprises temperature-adjusting medium conveying power equipment and a temperature-adjusting medium pipeline which is communicated with the temperature-adjusting medium conveying power equipment and the temperature-adjusting medium flow channel.

6. An internally threaded component according to claim 1, wherein: the lubrication flow passage is disposed helically around the internally threaded surface.

7. An internally threaded component according to claim 1, wherein: a lubrication medium conveying system is arranged; the lubrication medium delivery system includes a pressure delivery device and a medium inlet line communicating the pressure delivery device and the lubrication medium inlet passage.

8. An internally threaded component according to claim 1, wherein: a lubrication medium discharge system is provided; the lubrication medium discharge system includes a negative pressure discharge device and a medium discharge line communicating the negative pressure discharge device and the lubrication medium discharge passage.

9. An internally threaded component according to claim 1, wherein: one end of the through hole, which is communicated with the internal thread surface, is arranged at the root of the tooth of the internal thread structure.

10. An internally threaded component according to claim 1, wherein: the internally threaded member includes a nut.