CN219827621U

CN219827621U - Ball screw pair

Info

Publication number: CN219827621U
Application number: CN202320321471.7U
Authority: CN
Inventors: 沈广程; 刘霞; 陆郭彬
Original assignee: Suzhou Fengri Borui Precision Machinery Co ltd
Current assignee: Suzhou Fengri Borui Precision Machinery Co ltd
Priority date: 2023-02-27
Filing date: 2023-02-27
Publication date: 2023-10-13
Anticipated expiration: 2033-02-27

Abstract

The utility model relates to a ball screw pair, comprising: the screw shaft is provided with a first spiral rolling groove, the inner ring of the nut is provided with a second rolling groove which is adaptive to the first rolling groove, and balls are connected between the first rolling groove and the second rolling groove in a rolling way; a cleaning mechanism comprising: the cleaning device comprises an outer ring sleeve of a nut, a cleaning strip detachably arranged on the outer ring sleeve, and a fitting plug arranged on two sides of the cleaning strip and capable of filling a gap between a screw shaft and the nut, wherein the cleaning strip is spirally arranged on an inner ring of the outer ring sleeve and is adapted to a first rolling groove, and a spacing space is reserved between the cleaning strip and the first rolling groove; and the lubrication mechanism is used for oiling and lubricating the balls. Through the arrangement, the nut is lubricated by oiling, dust on a screw shaft can be effectively cleaned, the lubricating effect is prevented from being influenced, and the cleaning mechanism can be replaced under the condition that the nut and the workbench are not dismounted.

Description

Ball screw pair

Technical Field

The utility model relates to the technical field of ball screws, in particular to a ball screw pair.

Background

The ball screw is a mechanical part capable of converting rotary motion into linear motion, and compared with the situation that traditional sliding screw products are easy to damage and poor in positioning accuracy, the ball screw is characterized in that balls are arranged between a nut and a screw, rolling of the balls is utilized to convert sliding contact of the traditional screw into rolling contact, and friction force between the nut and the screw is effectively reduced.

The utility model provides a chinese patent as 202221710054.3 discloses a ball for lathe, this ball can clear up the dust that is stained with in outer end ball raceway surface through setting up the bits ware of scraping, prevents effectively that the dust from entering into in the nut and causing wearing and tearing ball and ball raceway, but this bits ware of scraping cleans the dust bits through the brush, in cleaning the in-process, the unavoidable lubricating oil that can be stained with of brush, the very easy dust that adsorbs of brush when leading to cleaning to mix lubricating oil and dust bits in the motion process, forms greasy dirt and drags the trace in the indent.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a ball screw pair which can effectively solve the technical problems.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

a ball screw assembly, comprising:

the screw shaft is provided with a first spiral rolling groove, the inner ring of the nut is provided with a second rolling groove which is adaptive to the first rolling groove, and balls are connected between the first rolling groove and the second rolling groove in a rolling way;

a cleaning mechanism comprising: the cleaning device comprises an outer ring sleeve of a nut, a cleaning strip detachably arranged on the outer ring sleeve, and a fitting plug arranged on two sides of the cleaning strip and capable of filling a gap between a screw shaft and the nut, wherein the cleaning strip is spirally arranged on an inner ring of the outer ring sleeve and is adapted to a first rolling groove, and a spacing space is reserved between the cleaning strip and the first rolling groove;

and the lubrication mechanism is used for oiling and lubricating the balls.

According to the technical scheme, through the lubricating mechanism, when the nut rotates relative to the screw, the balls can be filled with oil, oil films are formed in the first rolling groove and the second rolling groove through the balls to reduce friction, the cleaning strip on the nut moves spirally along the first rolling groove and is matched with the attaching plug to substantially separate the first rolling groove and the second rolling groove where the balls are located from the outside, only a spacing space is left to be communicated with the outside, the spacing space is larger than the thickness of the oil film, the thickness of the oil film is usually smaller than 0.1mm due to the fact that the screw moves at a higher speed, the thickness of the oil film is 0.1-0.3mm, the cleaning strip can not scrape the oil film in the rolling groove, and meanwhile dust in the rolling groove which falls to a lower screw shaft along with the processing table and is generated in the processing process can be cleaned under the condition that the relative screw moves at a higher speed, so that the dust in the rolling groove falls off to the periphery under the effect of centrifugal force.

As a preferred embodiment of the present utility model, the lubrication mechanism includes: the nut comprises a step hole formed in the nut, an oil storage groove formed in the nut and communicated with the step hole, oil absorbing cotton filled in the oil storage groove, and a sealing plug inserted into the step hole, wherein the end part of the oil storage groove is communicated with a ball.

According to the technical scheme, the ball is oiled by contacting the oil-absorbing cotton, so that the ball can be coated with an oil film on the first rolling groove and the second rolling groove in the moving process, and when the oil-absorbing cotton is insufficient, the sealing plug is pulled out to fill the oil storage groove with oil.

As a preferred embodiment of the utility model, the cleaning strip is provided with a dismounting assembly.

The technical scheme is realized, and the cleaning strip and the attaching plug are convenient to replace.

As a preferred aspect of the present utility model, the disassembling assembly includes: the nut comprises a plurality of first blind holes formed in the outer ring sleeve and the nut, first studs penetrating through the thickness of the outer ring sleeve and in threaded connection with the nut, an inner ring sleeve embedded in the inner ring of the outer ring sleeve, second blind holes formed in the outer ring sleeve and extending to the inner ring sleeve, and second studs penetrating through the outer ring sleeve and in threaded connection with the inner ring sleeve, wherein the first blind holes and the second blind holes are threaded holes.

According to the technical scheme, after the first stud is unscrewed, the outer ring sleeve and the nut are unlocked, then the outer ring sleeve is detached from the end part of the screw shaft, the second stud is screwed, the fixedly connection of the inner ring sleeve and the outer ring sleeve is released, the inner ring sleeve is taken out for replacement, and the cleaning strip and the sealing plug can be replaced under the condition that the nut and the workbench are not detached.

As a preferred embodiment of the present utility model, the thickness of the spacing space is 0.1-0.3mm.

As a preferable mode of the utility model, a narrowing passage is formed on one side of the oil storage tank, which is close to the ball, and the oil storage tank is communicated with the ball through the narrowing passage.

The technical scheme is realized, the influence on the second rolling groove is reduced, excessive lubricating oil is smeared, and the service life of the oil absorbing cotton is prolonged.

In a preferred embodiment of the present utility model, the attaching plug is slidably connected to the screw shaft and the end surfaces on both sides of the first rolling groove.

According to the technical scheme, the screw teeth of the screw shaft can be cleaned, so that the width of the attaching plug at least reaches half of the width of the screw teeth.

In summary, the utility model has the following beneficial effects: according to the ball screw pair, when the nut rotates relative to the screw rod, oil can be injected into the ball through the lubricating mechanism, oil films are formed in the first rolling groove and the second rolling groove through the ball to reduce friction force, the cleaning strip on the nut moves spirally along the first rolling groove, the first rolling groove and the second rolling groove where the ball is located are separated from the outside by matching with the attaching plug, only a spacing space is left to be communicated with the outside, the spacing space is larger than the thickness of the oil film, viscous lubricating oil is prevented from being selected due to the fact that the moving speed of the screw rod is higher, the thickness of the oil film is usually smaller than 0.1mm, the thickness of the spacing space is selected to be 0.1mm-0.3mm, the cleaning strip cannot scrape the oil films in the rolling grooves, and dust in the rolling grooves of the screw shaft which falls down along with the processing table in the processing process can be cleaned under the condition that the moving speed of the relative screw rod is higher, so that the dust in the rolling groove can fly and fall off to the periphery under the effect of centrifugal force. The nut lubrication device has the advantages that the nut lubrication device is used for lubricating the nut, dust on the screw shaft can be effectively cleaned, the lubrication effect is prevented from being influenced, and the cleaning mechanism can be replaced under the condition that the nut and the workbench are not dismounted.

Drawings

In order to more clearly illustrate the embodiments of the 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, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is an enlarged view of the utility model at a in fig. 1.

Fig. 3 is an enlarged view of the present utility model at B in fig. 1.

Corresponding part names are indicated by numerals and letters in the drawings: 1. a screw shaft; 2. a first rolling groove; 3. a nut; 4. a ball; 5. an outer ring sleeve; 6. a first blind hole; 7. a first stud; 8. an oil storage tank; 9. oil absorbing cotton; 10. a sealing plug; 11. a step hole; 12. a cleaning strip; 13. a second stud; 14. an inner ring sleeve; 15. fitting the plug; 17. a pitch space; 18. a second rolling groove; 19. and a second blind hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. 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.

Examples

As shown in fig. 1-3, a ball screw assembly includes:

the screw shaft 1 and the nut 3 sleeved on the screw shaft 1, the screw shaft 1 is provided with a first spiral rolling groove 2, the inner ring of the nut 3 is provided with a second rolling groove 18 which is adapted to the first rolling groove 2, and balls 4 are connected between the first rolling groove 2 and the second rolling groove 18 in a rolling way;

a cleaning mechanism comprising: the cleaning device comprises an outer ring sleeve 5 detachably arranged on a nut 3, cleaning strips 12 detachably arranged on the outer ring sleeve 5, and attaching plugs 15 which are arranged on two sides of the cleaning strips 12 and can fill gaps between a screw shaft 1 and the nut 3, wherein the cleaning strips 12 are spirally arranged on an inner ring of the outer ring sleeve 5 and are matched with a first rolling groove 2, and a spacing space 17 is formed between the cleaning strips 12 and the first rolling groove 2;

and the lubrication mechanism is used for oiling and lubricating the balls 4.

Wherein, lubrication mechanism includes: the oil-absorbing sealing plug comprises a stepped hole 11 formed in a nut 3, an oil storage groove 8 formed in the nut 3 and communicated with the stepped hole 11, oil-absorbing cotton 9 filled in the oil storage groove 8, and a sealing plug 10 inserted into the stepped hole 11, wherein the end portion of the oil storage groove 8 is communicated with a ball 4, the ball 4 is contacted with the oil-absorbing cotton 9 to be oiled, the ball 4 is coated with an oil film in the movement process, the first rolling groove 2 and the second rolling groove 18 are coated with the oil film, and when the oil amount of the oil-absorbing cotton 9 is insufficient, the sealing plug 10 is pulled out to be capable of oiling the oil storage groove 8.

Further, the cleaning strip 12 is provided with a disassembly assembly to facilitate replacement of the cleaning strip 12 and the fitting plug 15.

Specifically, the disassembly assembly includes: the cleaning device comprises a plurality of first blind holes 6 formed in an outer ring sleeve 5 and a nut 3, first studs 7 penetrating through the thickness of the outer ring sleeve 5 and being in threaded connection with the nut 3, an inner ring sleeve 14 embedded in the inner ring of the outer ring sleeve 5, second blind holes 19 formed in the outer ring sleeve 5 and extending to the inner ring sleeve 14, and second studs 13 penetrating through the outer ring sleeve 5 and being in threaded connection with the inner ring sleeve 14, wherein the first blind holes 6 and the second blind holes 19 are threaded holes, after the first studs 7 are unscrewed, the outer ring sleeve 5 and the nut 3 are unlocked, then the outer ring sleeve 5 is detached from the end part of a screw shaft 1, the second studs 13 are screwed, the inner ring sleeve 14 and the outer ring sleeve 5 are released from being fixedly connected, the inner ring sleeve 14 is taken out for replacement, and the cleaning strip 12 and the sealing plug 10 can be replaced under the condition that the nut 3 and a workbench are not detached.

The thickness of the spacing space 17 is 0.1-0.3mm.

The oil storage tank 8 is close to the side of ball 4 and has the passageway of narrowing to communicate in ball 4 through the passageway of narrowing, reduce the influence to second rolling groove 18, and smear too much lubricating oil, increase the length of time of the cotton 9 of oil absorption use.

The attaching plug 15 is slidably connected to the end surfaces on both sides of the screw shaft and the first rolling groove 2, so that the screw teeth of the screw shaft 1 can be cleaned, and therefore, the width of the attaching plug 15 is at least half of the width of the screw teeth.

When the screw shaft 1 rotates, balls 4 are arranged between the nut 3 and the screw shaft 1, the balls 4 are in rolling connection between the first rolling groove 2 and the second rolling groove 18, the structures of the first rolling groove 2 on the screw shaft 1 and the second rolling groove 18 in the nut 3 are all in the shape of half balls 4, and the rolling grooves on the screw shaft 1 and the nut 3 are combined together to form a circle, so that the balls are matched with the balls 4, and the balls 4 can move in the circle. The screw shaft 1 and the nut 3 are not in contact, and the screw shaft 1 and the nut 3 are driven by the balls 4.

The second rolling groove 18 is filled with balls 4, and the balls 4 roll along the second rolling groove 18 when the nut 3 or the screw shaft 1 starts to move, and the balls do cyclic motion repeatedly through the ball return pipe or the reverser. When the nut 3 is located on the screw shaft 1, the balls 4 roll in the second rolling grooves 18, so that the nut 3 is driven to move along the screw shaft 1, friction between the screw shaft 1 and the nut 3 is reduced, and the transmission efficiency of the ball 4 screw is improved, and abrasion of the screw shaft 1 and the nut 3 is reduced.

The function of the ball 4 is to convert sliding friction between the nut 3 and the screw shaft 1 into rolling friction, the rolling friction can effectively reduce friction force relative to the sliding friction, so that overall transmission efficiency is improved, abrasion can be reduced, the starting moment can be reduced due to the fact that the ball 4 is used, the crawling phenomenon such as sliding motion can not occur, accurate micro-feeding can be guaranteed, sensitivity and motion accuracy of the ball 4 screw are improved, and the ball 4 screw can be applied to equipment and use scenes of high-accuracy motion.

It will be appreciated by those skilled in the art that the screw shaft 1 may be driven in rotation by a motor or other driving device to convert rotational movement between the screw shaft 1 and the nut 3 into linear movement of the nut 3 along the screw shaft 1, the screw shaft 1 and the nut 3 forming a screw motion pair.

The cleaning strip 12 is made of polycarbonate, and in fig. 1, the end parts of the cleaning strip 12 at the bottom of the left side and the top of the right side are opened into inclined planes, the direction of the opened inclined planes is changed to not change the thickness of the interval space 17 between the cleaning strip 12 and the first rolling groove 2, and the cleaning and removing effects can be increased under the condition of leftward or rightward movement.

According to the working principle, when the nut 3 rotates relative to the screw rod, oil can be injected into the ball 4, oil films are formed in the first rolling groove 2 and the second rolling groove 18 through the ball 4 to reduce friction force, the cleaning strip 12 on the nut 3 moves spirally along the first rolling groove 2 and is matched with the attaching plug 15 to substantially separate the first rolling groove 2 and the second rolling groove 18 where the ball 4 is positioned from the outside, only the interval space 17 is left to be communicated with the outside, the interval space 17 is larger than the thickness of the oil films, viscous lubricating oil is required to be avoided due to the fact that the movement speed of the screw rod is higher, the thickness of the oil films is usually smaller than 0.1mm, the thickness of the interval space 17 is selected to be 0.1mm-0.3mm, the cleaning strip 12 can not scrape the oil films in the rolling grooves, and meanwhile dust and dust in the rolling grooves which fall down to the screw shaft 1 below along with the processing table and generated in the processing process can be cleaned under the action of centrifugal force under the condition that the movement speed of the cleaning strip 12 is higher relative to the screw rod.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A ball screw assembly, comprising:

and the lubrication mechanism is used for oiling and lubricating the balls.

2. The ball screw assembly according to claim 1, wherein the lubrication mechanism comprises: the nut comprises a step hole formed in the nut, an oil storage groove formed in the nut and communicated with the step hole, oil absorbing cotton filled in the oil storage groove, and a sealing plug inserted into the step hole, wherein the end part of the oil storage groove is communicated with a ball.

3. A ball screw assembly according to claim 1, wherein the purge strip is provided with a disassembly assembly.

4. A ball screw assembly according to claim 3, wherein the disassembly assembly comprises: the nut comprises a plurality of first blind holes formed in the outer ring sleeve and the nut, first studs penetrating through the thickness of the outer ring sleeve and in threaded connection with the nut, an inner ring sleeve embedded in the inner ring of the outer ring sleeve, second blind holes formed in the outer ring sleeve and extending to the inner ring sleeve, and second studs penetrating through the outer ring sleeve and in threaded connection with the inner ring sleeve, wherein the first blind holes and the second blind holes are threaded holes.

5. A ball screw assembly according to claim 1, wherein the pitch space has a thickness of 0.1-0.3mm.

6. The ball screw assembly according to claim 2, wherein the oil reservoir has a narrowed passage on a side thereof adjacent to the ball and is communicated with the ball through the narrowed passage.

7. The ball screw assembly of claim 1, wherein said abutment plug is slidably coupled to end surfaces on opposite sides of said screw shaft and first race.