CN221196028U - Lubricating device, nut assembly and screw assembly - Google Patents

Abstract

The embodiment of the application provides a lubricating device, a nut assembly and a screw assembly, wherein the lubricating device comprises: the at least two lubricating pieces are annular and stacked, the at least two lubricating pieces are used for being sleeved on the periphery of a screw rod of the screw rod assembly, each lubricating piece is radially inwards provided with a flexible protrusion, the flexible protrusions are used for being in contact with a raceway of the screw rod, and the flexible protrusions of the lubricating pieces at two ends of the at least two lubricating pieces are staggered in a preset angle. The lubricating device, the nut component and the screw component provided by the embodiment of the application can realize self-lubrication of the screw roller path in the screw component, so that the roller path contains lubricating oil for a long time, thereby reducing abrasion of the screw component, reducing maintenance times of the screw component and prolonging the service life of the screw component.

Description

Lubricating device, nut assembly and screw assembly

Technical Field

The application relates to the technical field of lead screws, in particular to a lubricating device, a nut assembly and a lead screw assembly.

Background

The ball screw is a transmission element most commonly used on tool machines and precision machines, and has the main function of converting rotary motion into linear motion or converting torque into axial repeated acting force, and simultaneously has the characteristics of high precision, reversibility and high efficiency. Ball screws are widely used in various industrial equipment and precision instruments due to their small frictional resistance.

With the popularization of ball screw as transmission component in various industries, when the ball screw is applied in industries with high cleanliness requirement, such as semiconductor industry, liquid crystal industry, food industry, medical industry, etc., the lubrication of ball screw becomes an important problem due to higher environment oil-avoiding requirement.

Disclosure of utility model

The lubricating device, the nut component and the screw component provided by the embodiment of the application can realize self-lubrication of the screw roller path in the screw component, so that the roller path contains lubricating oil for a long time, thereby reducing abrasion of the screw component, reducing maintenance times of the screw component and prolonging the service life of the screw component.

An aspect of an embodiment of the present application provides a lubrication apparatus for a screw assembly, including: at least two lubricating members;

The at least two lubricating pieces are annular and stacked, and are used for being sleeved on the periphery of a screw rod of the screw rod assembly;

Each of the lubricating members has a flexible projection radially inwardly for contact with the raceway of the screw;

The flexible protrusions of the lubricating parts at the two ends of the at least two lubricating parts are staggered at a preset angle.

The lubricating device provided by the embodiment of the application can be assembled in the nut of the screw rod assembly and moves along with the nut. When the lubricating piece rotates around the screw rod of the screw rod assembly and moves along the axial direction of the screw rod, the flexible protrusions can fully smear the lubricating agent to the roller path of the screw rod, and the flexible protrusions of the lubricating piece at the two ends of the lubricating piece are staggered at a preset angle, so that the phenomenon that the lubricating piece is blocked during working can be prevented. Therefore, the self-lubricating effect of the lubricating device on the screw is realized, and the roller path contains lubricating oil for a long time, so that the abrasion of a screw assembly is reduced. Compared with the traditional oiling mode, the maintenance times and maintenance time of the screw rod assembly can be reduced, and the service life of the screw rod assembly is prolonged. Moreover, the lubricant cannot leak too much, and the lubricant is suitable for working environments with high cleanliness requirements. In addition, due to the self-lubricating effect of the lubricating device on the screw rod assembly, the lubricating device can be suitable for most of the scenes of screw rod assembly lubrication.

In one possible embodiment, the flexible protrusion is circular arc-shaped.

In this way, the contact effect of the compliant bumps in the raceway of the screw can be increased and the smoothness of movement of the compliant bumps in the raceway can be increased.

In one possible embodiment, when the at least two lubricants are two lubricants, the flexible protrusions of the two lubricants are disposed at a predetermined angular offset.

The lubrication device comprises only two lubrication elements, which can achieve a balance between material costs and the effect of applying the lubricant.

In one possible embodiment, the lubrication device further comprises: a housing;

the at least two lubricants are mounted within the housing.

In this way, other parts can be prevented from deforming or damaging the lubrication device.

In one possible embodiment, the flexible protrusions are made of rubber or felt.

Another aspect of an embodiment of the present application provides a nut assembly for a screw assembly, including: a nut and a lubrication device as described above;

the nut is used for being sleeved on the periphery of the screw rod assembly, and the lubricating device is assembled in the nut.

The nut component provided by the embodiment of the application can enable the lubricating device to move along with the nut. When the lubricating piece rotates around the screw rod of the screw rod assembly and moves along the axial direction of the screw rod, the flexible protrusions can fully smear the lubricating agent to the roller path of the screw rod, and the flexible protrusions of the lubricating piece at the two ends of the lubricating piece are staggered at a preset angle, so that the phenomenon that the lubricating piece is blocked during working can be prevented. Therefore, the self-lubricating effect of the lubricating device on the screw is realized, and the roller path contains lubricating oil for a long time, so that the abrasion of a screw assembly is reduced. Compared with the traditional oiling mode, the maintenance times and maintenance time of the screw rod assembly can be reduced, and the service life of the screw rod assembly is prolonged. Moreover, the lubricant cannot leak too much, and the lubricant is suitable for working environments with high cleanliness requirements. In addition, due to the self-lubricating effect of the lubricating device on the screw rod assembly, the lubricating device can be suitable for most of the scenes of screw rod assembly lubrication.

In one possible embodiment, at least one end of the nut is provided with an assembly cavity, and the lubricating device is assembled in the assembly cavity.

The embedded lubricating device can not increase the length of the nut, and can ensure the effective stroke of the screw rod assembly. In addition, the assembly cavity is formed at the end part of the nut, so that the assembly and the replacement of the lubricating device can be facilitated.

In one possible embodiment, the nut assembly further comprises: ball, circulator and first fixing piece;

The balls and the circulator are used for enabling the nut assembly to axially reciprocate along a screw rod of the screw rod assembly;

The circulator set up in the inboard in assembly chamber, and with first mounting is fixed, lubricating arrangement set up in first mounting deviates from the one side of circulator.

In one possible embodiment, the nut assembly further comprises: a sealing member and a second fixing member;

The sealing element is used for sealing the assembly cavity, and the second fixing element is arranged on one side, away from the lubricating device, of the sealing element so as to fix the sealing element.

Therefore, the lubricant in the assembly cavity can be prevented from overflowing or external impurities can be prevented from entering the assembly cavity, and the installation stability of each part in the assembly cavity is ensured.

In yet another aspect, an embodiment of the present application provides a screw assembly, comprising: a screw and nut assembly as described above;

The nut component is sleeved on the periphery of the screw rod.

According to the screw rod assembly provided by the embodiment of the application, when the lubricating piece of the lubricating device rotates around the screw rod of the screw rod assembly and moves along the axial direction of the screw rod, the flexible protrusions can fully smear the lubricating agent on the roller path of the screw rod, and as the flexible protrusions of the lubricating piece at the two ends of the lubricating piece are staggered at a preset angle, the phenomenon that the lubricating piece is blocked during working can be prevented. Therefore, the self-lubricating effect of the lubricating device on the screw is realized, and the roller path contains lubricating oil for a long time, so that the abrasion of a screw assembly is reduced. Compared with the traditional oiling mode, the maintenance times and maintenance time of the screw rod assembly can be reduced, and the service life of the screw rod assembly is prolonged. Moreover, the lubricant cannot leak too much, and the lubricant is suitable for working environments with high cleanliness requirements. In addition, due to the self-lubricating effect of the lubricating device on the screw rod assembly, the lubricating device can be suitable for most of the scenes of screw rod assembly lubrication.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a lubrication apparatus according to an embodiment of the present application;

FIG. 2 is a schematic view of a lubricant according to an embodiment of the present application;

FIG. 3 is a schematic view of a lubrication apparatus according to an embodiment of the present application applied to a screw assembly;

FIG. 4 is a cross-sectional view of the lubrication apparatus of FIG. 3;

FIG. 5 is a schematic view of a nut assembly applied to a screw assembly according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a screw assembly according to an embodiment of the present application.

Reference numerals illustrate:

100-lubrication device;

110-lubricating piece;

111-flexible protrusions;

120-a housing;

200-nut assembly;

210-a nut;

211-assembly chamber;

220-circulator;

230-a first securing member;

240-seals;

250-a second securing member;

300-lead screw assembly;

310-screw;

311-race.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The ball screw is a transmission element most commonly used on tool machines and precision machines, and has the main function of converting rotary motion into linear motion or converting torque into axial repeated acting force, and simultaneously has the characteristics of high precision, reversibility and high efficiency. Ball screws are widely used in various industrial equipment and precision instruments due to their small frictional resistance.

With the popularization of ball screw as transmission component in various industries, when the ball screw is applied in industries with high cleanliness requirement, such as semiconductor industry, liquid crystal industry, food industry, medical industry, etc., the lubrication of ball screw becomes an important problem due to higher environment oil-avoiding requirement.

In the related art, a lubricant is generally supplied to the ball screw periodically by adopting two modes of dispersion lubrication and centralized lubrication. The distributed lubrication refers to manually feeding oil to the ball screw at fixed time by an oil gun, and the centralized lubrication refers to manually or automatically feeding oil to the ball screw by a pipeline.

However, no matter the dispersion lubrication or the centralized lubrication is adopted, a specific moistening device and maintenance man-hour are required to be input, the maintenance and device cost of the screw rod assembly are increased, and great inconvenience is brought in some application scenes. In addition, if the lubricant is not timely supplied, the lead screw assembly is worn and damaged, if the lubricant is more supplied, the lubricant is leaked, the environment is polluted, and the lead screw assembly is not suitable for the working environment with high cleanliness requirement.

In order to solve the problems, the embodiment of the application provides a lubricating device, a nut assembly and a screw assembly, wherein a lubricating piece in the lubricating device has a self-lubricating function, and long-time lubrication of a screw raceway of the screw assembly can be realized, so that abrasion of the screw assembly is reduced, maintenance times of the screw assembly are reduced, and the service life of the screw assembly is prolonged. And the lubricant cannot leak, and is suitable for working environments with high cleanliness requirements. In addition, due to the self-lubricating effect of the lubricating device on the screw rod assembly, the lubricating device can be suitable for most of the scenes of screw rod assembly lubrication.

The lubricating device, the nut assembly and the screw assembly provided by the embodiment of the application are described in detail below with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural view of a lubrication device 100 according to an embodiment of the present application, fig. 2 is a schematic structural view of a lubrication element 110 according to an embodiment of the present application, fig. 3 is a schematic structural view of a lubrication device 100 according to an embodiment of the present application applied to a screw assembly 300, and referring to fig. 1, fig. 2 and fig. 3, the lubrication device 100 according to an embodiment of the present application includes: at least two lubricating members 110. Wherein "at least two lubricants 110" means that the lubrication device 100 may include: two lubricators 110, three lubricators 110, four lubricators 110 or even more. The embodiment of the present application is illustrated with the lubrication apparatus 100 including two lubrication members 110.

Specifically, referring to FIG. 1, at least two of the lubricants 110 are annular and stacked, and illustratively, in FIG. 1, two of the lubricants 110 are annular and stacked at the same center. At least two lubricators 110 are provided to fit around the outer circumference of the screw 310 of the screw assembly 300 (see fig. 3).

Fig. 4 is a cross-sectional view of the lubrication apparatus 100 of fig. 3, with reference to fig. 2 and 4, each of the lubrication members 110 having flexible protrusions 111 radially inward, the flexible protrusions 111 for contacting the raceways 311 of the screw 310. In some embodiments of the present application, the flexible protrusions 111 may be made of rubber, felt, or the like, and in other embodiments, the flexible protrusions 111 may be made of a special material containing a lubricant. As the lubricant 110 rotates about the screw 310 and moves in the axial direction of the screw 310, the flexible protrusions 111 can slide along the raceways 311 of the screw 310, replenishing the raceways 311 of the screw 310 with lubricant.

The annular portion of the lubricant 110 may be integrally formed or non-integrally formed with the flexible protrusion 111, or may be integrally formed or non-integrally formed with the flexible protrusion 111.

With continued reference to fig. 1, the flexible protrusions 111 of the lubricants 110 at the two ends of the at least two lubricants 110 are disposed with a predetermined angular offset, which is understood to mean that the flexible protrusions 111 of the lubricants 110 at the outermost ends of the at least two lubricants 110 are disposed with a predetermined angular offset. Illustratively, as shown in FIG. 1, the lubrication apparatus 100 includes two lubrication members 110, with the flexible protrusions 111 of the two lubrication members 110 being disposed at a predetermined angular offset.

The flexible protrusions 111 of the two lubricating members 110 are staggered at a preset angle, so that, on one hand, the flexible protrusions 111 can be fully contacted with two sides of the raceway 311 of the screw 310 to apply the lubricant to the raceway 311 with the largest area, and on the other hand, when the lubricating device 100 rotates around the screw 310 and moves along the axial direction of the screw 310, the staggered flexible protrusions 111 can have deformation spaces to prevent the lubricating device 100 from being blocked during the axial movement of the screw 310.

The preset angle may be set according to an inclination of the raceway 311 of the screw 310, and the larger the preset angle is when the inclination of the raceway 311 of the screw 310 is larger, the smaller the preset angle is when the inclination of the raceway 311 of the screw 310 is smaller. Illustratively, in some embodiments of the present application, the preset angle may be about 30 °.

It will be appreciated that the lubrication device 100 provided by the embodiments of the present application may be assembled in the nut 210 of the screw assembly 300 and move with the nut 210. When the lubricant 110 rotates around the screw 310 of the screw assembly 300 and moves along the axial direction of the screw 310, the flexible protrusions 111 can sufficiently spread the lubricant on the roller path 311 of the screw 310, and the phenomenon that the lubricant 110 is blocked during operation can be prevented due to the staggered arrangement of the flexible protrusions 111 of the lubricant 110 at the two ends of the lubricant 110 at a preset angle. This achieves self-lubrication of the screw 310 by the lubrication device 100, so that the raceway 311 contains lubricating oil for a long time, thereby reducing wear of the screw assembly. Compared with the traditional oiling mode, the maintenance times and maintenance time of the screw rod assembly 300 can be reduced, and the service life of the screw rod assembly 300 is prolonged. Moreover, the lubricant cannot leak too much, and the lubricant is suitable for working environments with high cleanliness requirements. In addition, due to the self-lubricating effect of the lubricating device 100 on the screw assembly 300, the lubricating device 100 can be applied to most of the lubrication scenes of the screw assembly 300.

Of course, the application is not so limited. In order to increase the contact effect of the flexible protrusions 111 in the raceway 311 of the screw 310 and to increase the smoothness of movement of the flexible protrusions 111 in the raceway 311, in some embodiments of the present application, the flexible protrusions 111 may be provided in a circular arc shape (as shown in fig. 1 to 4). Of course, it is understood that in other embodiments of the present application, the flexible protrusions 111 may be regular in shape, such as triangular, trapezoidal, etc., or irregular in shape.

In some embodiments of the present application, when at least two of the lubricants 110 are two of the lubricants 110, the flexible protrusions 111 of the two lubricants 110 are disposed at a predetermined angular offset. The lubrication device 100 includes only two lubrication members 110 to achieve a balance of material costs and lubrication application effects. Of course, in other embodiments of the present application, the lubrication device 100 may include more than two lubrication members 110 without regard to material costs.

The lubrication device 100 may be used alone for the screw 310 of the screw assembly 300, or may be assembled to other components in the screw assembly 300, for example, the nut 210 of the lubrication device 100 may be assembled to the screw assembly 300 to move with the nut 210. To prevent other components from deforming or damaging the lubrication device 100 when assembled in the nut 210 or the like, in some embodiments of the present application, the lubrication device 100 may further include: housing 120120 (shown with reference to fig. 5), at least two lubricants 110 are mounted within housing 120120. The housing 120120 protects the lubricant 110. The connection between the lubricant 110 and the housing 120120 may be a series of conventional connections such as adhesive, fastener connections, snaps, etc. The material of the housing 120120 may be metal, plastic, etc., as long as it can protect the lubricant 110, and the material of the housing 120120 is not limited herein.

Fig. 5 is a schematic diagram of a nut assembly 200 according to an embodiment of the present application applied to a screw assembly 300, and referring to fig. 5, the present application further provides a nut assembly 200, including: nut 210 and lubrication apparatus 100 as described above.

Specifically, the nut 210 is used to be sleeved on the outer circumference of the screw 310 of the screw assembly 300, and the lubrication device 100 is assembled in the nut 210. The lubrication device 100 can move along with the nut 210, so that the screw assembly 300 can work and lubricate at the same time, thereby achieving the purpose of self-lubrication.

The technical features of the lubrication device 100, the technical effects achieved by the technical features, and the technical problems solved by the technical effects are the same as those of the lubrication device 100 shown above, and are not described in detail herein.

With continued reference to fig. 5, in some embodiments of the present application, a fitting cavity 211 may be provided at least one end of the nut 210, with the lubrication device 100 being fitted within the fitting cavity 211. The "at least one end of the nut 210" means that the one end of the nut 210 is provided with the assembling cavity 211 or both ends of the nut 210 are provided with the assembling cavity 211. The embedded lubrication device 100 does not increase the length of the nut 210, and can ensure the effective stroke of the screw assembly 300. In addition, the assembling cavity 211 is formed at the end of the nut 210, so that the assembling and replacing of the lubrication device 100 can be facilitated.

Of course, in other embodiments of the present application, the lubrication device 100 may be mounted at a middle portion of the nut 210, etc., and the present application is not limited to the mounting position of the lubrication device 100.

With continued reference to fig. 5, in some embodiments of the application, the nut assembly 200 may further include: balls (not shown), a circulator 220, and a first fixture 230. The ball and circulator 220 is used to reciprocate the nut assembly 200 axially along the screw 310 of the screw assembly 300. The ball screw is made into a ball screw, and the working principle of the ball screw can refer to the related technology and is not repeated herein.

Wherein the circulator 220 can complete the reverse direction of the balls to realize the reciprocating movement of the nut 210 along the screw 310. The circulation device can be arranged on the inner side of the assembling cavity 211 and fixed by the first fixing piece 230, and the first fixing piece 230 can adopt a clamp spring and the like to prevent the circulator 220 from moving along the axial direction of the screw 310. The lubrication device 100 is disposed on a side of the first fixture 230 facing away from the circulator 220.

In order to prevent the lubricant in the fitting cavity 211 from overflowing or foreign substances from entering the fitting cavity 211, with continued reference to fig. 5, the nut assembly 200 provided by the embodiment of the present application may further include: the sealing member 240 and the second fixing member 250, the sealing member 240 is used for sealing the assembly cavity 211, lubricant in the assembly cavity 211 is prevented from overflowing or external impurities enter the assembly cavity 211, and the second fixing member 250 is arranged on one side of the sealing member 240 away from the lubricating device 100 to fix the sealing member 240, so that the installation stability of all components in the sealing cavity is ensured. The second fixing member 250 may employ a snap spring or the like.

The embodiment of the present application further provides a screw assembly 300, fig. 6 is a schematic structural diagram of the screw assembly 300 according to an embodiment of the present application, and referring to fig. 6, the screw assembly 300 according to the embodiment of the present application may include: the screw 310 and the nut assembly 200 shown above are arranged with the nut assembly 200 being sleeved on the outer circumference of the screw 310.

The technical features of the nut assembly 200 and the lubrication device 100 included in the nut assembly 200, the technical effects achieved by the technical features, and the technical problems that can be solved by the technical effects are the same as those of the nut assembly 200 and the lubrication device 100 described above, and are not described in detail herein.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. A lubrication device for a screw assembly, comprising: at least two lubricating members;

The at least two lubricating pieces are annular and stacked, and are used for being sleeved on the periphery of a screw rod of the screw rod assembly;

Each of the lubricating members has a flexible projection radially inwardly for contact with the raceway of the screw;

The flexible protrusions of the lubricating parts at the two ends of the at least two lubricating parts are staggered at a preset angle.

2. The lubrication device of claim 1, wherein the flexible protrusions are rounded.

3. The lubrication device of claim 1, wherein when the at least two lubrication members are two lubrication members, the flexible protrusions of the two lubrication members are disposed at a predetermined angular offset.

4. A lubrication device according to any one of claims 1-3, further comprising: a housing;

the at least two lubricants are mounted within the housing.

5. A lubrication device according to any one of claims 1-3, wherein the flexible protrusions are made of rubber or felt.

6. A nut assembly for a screw assembly, comprising: nut and lubrication device according to any one of claims 1-5;

the nut is used for being sleeved on the periphery of the screw rod assembly, and the lubricating device is assembled in the nut.

7. The nut assembly according to claim 6, wherein at least one end of the nut is provided with an assembly cavity, and the lubrication device is assembled in the assembly cavity.

8. The nut assembly as defined in claim 7, further comprising: ball, circulator and first fixing piece;

The balls and the circulator are used for enabling the nut assembly to axially reciprocate along a screw rod of the screw rod assembly;

The circulator set up in the inboard in assembly chamber, and with first mounting is fixed, lubricating arrangement set up in first mounting deviates from the one side of circulator.

9. The nut assembly according to claim 7 or 8, further comprising: a sealing member and a second fixing member;

The sealing element is used for sealing the assembly cavity, and the second fixing element is arranged on one side, away from the lubricating device, of the sealing element so as to fix the sealing element.

10. A lead screw assembly, comprising: a screw and nut assembly as defined in any one of claims 6 to 9;

The nut component is sleeved on the periphery of the screw rod.