CN212744910U

CN212744910U - Nut rotation type ball screw

Info

Publication number: CN212744910U
Application number: CN202021143787.4U
Authority: CN
Inventors: 肖建安; 李坤
Original assignee: Shenzhen Hiwin Technology Co ltd
Current assignee: Shenzhen Hiwin Technology Co ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-03-19
Anticipated expiration: 2030-06-18

Abstract

The utility model provides a nut rotation type ball screw, include: the screw rod is sleeved with a nut, and a ball is arranged between the screw rod and the nut; the bearing is sleeved on the nut, a groove for the ball to move circularly is formed in the bearing and the nut, and a lubricating opening communicated with the groove is formed in the bearing; a seal provided between ends of both the nut and the bearing to prevent the lubricating liquid flowing in from the lubricating opening from flowing out. The utility model discloses can improve the lubricity between each part of nut rotation type ball screw, can prevent simultaneously that lubricated liquid from leaking.

Description

Nut rotation type ball screw

Technical Field

The utility model relates to the technical field of transmission, in particular to nut rotation type ball screw.

Background

The existing nut rotating type ball screw generally increases the lubricity among the screw, the nut and the ball by coating lubricating liquid on the screw, but the lubricating liquid cannot be coated inside the nut, so that the relative motion among the screw, the ball and the nut is not lubricated enough.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a nut rotation type ball screw aims at solving the not lubricated enough problem of relative motion between the screw rod of sending, ball and the nut among the prior art.

In order to achieve the above object, the utility model provides a nut rotation type ball screw, include: the screw rod is sleeved with a nut, and a ball is arranged between the screw rod and the nut; the bearing is sleeved on the nut, a groove for the ball to move circularly is formed in the bearing and the nut, and a lubricating opening communicated with the groove is formed in the bearing; a seal provided between ends of both the nut and the bearing to prevent the lubricating liquid flowing in from the lubricating opening from flowing out.

Furthermore, the lubricating openings are provided in a plurality, and the lubricating openings are provided on two side walls in the radial direction of the bearing.

Furthermore, a plurality of lubricating openings are formed in the bearing, and the lubricating openings are arranged in the axial direction of the bearing at equal intervals.

Further, the nut-rotating ball screw further includes: a plug inserted into the lubrication opening to block the lubrication opening.

Further, the number of the sealing elements is two, and the two sealing elements are respectively arranged in two end gaps formed between the nut and the bearing.

Further, the sealing element is a rubber ring.

Further, the tip of bearing is provided with the tip internal tooth, the nut surface corresponds the position of tip internal tooth is provided with the tip external tooth, the tip external tooth with the tip internal tooth can intermeshing, the rubber circle set up in the tip external tooth with between the tip internal tooth.

Further, the nut-rotating ball screw further includes: and the driving component is in transmission connection with the nut so as to drive the nut to rotate.

Further, the nut extends out of the gear portion outward of the bearing, the drive assembly includes: a transmission gear that meshes with the gear portion; the transmission gear is arranged on an output shaft of the motor.

Furthermore, two ends of the nut extend out of two gear parts towards the bearing respectively, two groups of driving assemblies are provided, and a transmission gear of each driving assembly is meshed with each gear part.

The technical scheme of the utility model in, through seted up on the bearing lubricated opening, lubricated opening with the slot intercommunication, through lubricated opening can to lubricated liquid is poured into in the slot, because the ball is at the inslot motion, consequently, the ball can take lubricated liquid and bearing, nut and lead screw contact roll, lubricated liquid can be given simultaneously ball, bearing, nut and lead screw play the lubrication action, reduce frictional resistance each other, can improve smoothness nature when nut rotation type ball screw functions. Further, since there is a gap between the nut and the bearing, the present embodiment further prevents the lubricating fluid from flowing out from the gap between the nut and the bearing by providing the sealing member between the ends of the nut and the bearing, and restricts the lubricating fluid in the groove, thereby solving the problem that the lubricating fluid cannot be lubricated for a long time due to leakage of the lubricating fluid.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of an embodiment of the nut rotating ball screw according to the present invention.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1, the present invention provides a nut rotating ball screw, including: the screw rod 10 is sleeved with a nut 20, and a ball (not shown) is arranged between the screw rod 10 and the nut 20; the bearing 30, the bearing 30 is sleeved on the nut 20, grooves (not shown) for the balls to move circularly are formed on the bearing 30 and the nut 20, and a lubricating opening 31 communicated with the grooves is formed on the bearing 30; and a seal 40, wherein the seal 40 is disposed between the end portions of the nut 20 and the bearing 30 to prevent the lubricating liquid flowing in from the lubricating opening 31 from flowing out.

In this embodiment, the nut 20 is sleeved on the screw rod 10, a ball is disposed between the nut 20 and the screw rod 10, the nut 20 drives the ball to rotate when rotating, the ball pushes the screw rod 10 to move along a straight line, so that the rotation motion of the nut 20 is converted into the straight line motion of the screw rod 10, meanwhile, the bearing 30 is sleeved on the nut 20, a groove is disposed between the nut 20 and the bearing 30, and the ball rolls in the groove, so as to realize the circular rolling of the ball.

In this embodiment, the bearing 30 is provided with the lubricating opening 31, the lubricating opening 31 is communicated with the groove, lubricating fluid can be poured into the groove through the lubricating opening 31, the ball can bring the lubricating fluid to contact and roll with the bearing 30, the nut 20 and the screw rod 10 because the ball moves in the groove, the lubricating fluid can simultaneously lubricate the ball, the bearing 30, the nut 20 and the screw rod 10, the friction resistance between the two is reduced, and the smoothness of the nut rotating type ball screw in operation can be improved. Further, since there is a gap between the nut 20 and the bearing 30, in the present embodiment, the sealing member 40 is further provided between the end portions of the nut 20 and the bearing 30, so that the lubricating fluid is prevented from flowing out from the gap between the nut 20 and the bearing 30, and the lubricating fluid is confined in the groove, thereby solving the problem that the lubricating fluid cannot be lubricated for a long time due to leakage of the lubricating fluid.

Referring to fig. 1, a plurality of lubrication openings 31 are formed, and the plurality of lubrication openings 31 are formed on two side walls (only one side wall of the plurality of lubrication openings 31 is shown in fig. 1) in the radial direction of the bearing 30.

In this embodiment, the plurality of lubricating openings 31 are formed, and the plurality of lubricating openings 31 are formed on two side walls of the bearing 30 in the radial direction, that is, the plurality of lubricating openings 31 are formed on the side walls of the bearing 30 which are away from each other, so that the lubricating liquid is added to the groove through the lubricating openings 31 on the two side walls which are away from each other, the uniformity of the distribution of the lubricating liquid in the groove can be ensured, and the lubricating degree can be improved.

Referring to fig. 1, a plurality of lubrication openings 31 are further formed, and the lubrication openings 31 are disposed at equal intervals in the axial direction of the bearing 30.

In this embodiment, the plurality of lubricating openings 31 are formed, and the lubricating openings 31 are arranged at equal intervals in the axial direction of the bearing 30, so that the lubricating liquid is added to the grooves through the plurality of lubricating openings 31 arranged at equal intervals, the uniformity of the distribution of the lubricating liquid in the grooves can be ensured, and the lubricating degree is improved.

Referring to fig. 1, further, the nut-rotating ball screw further includes: a plug 32, said plug 32 being inserted into said lubrication opening 31 to block said lubrication opening 31.

In the present embodiment, the lubricant fluid introduced into the groove is prevented from being exposed from the lubricant opening 31 by the plug 32 being inserted into the lubricant opening 31 to block the lubricant opening 31. The blocking member may be a rubber plug, a bolt, or the like.

Further, the number of the sealing members 40 is two, and the two sealing members 40 are respectively disposed in two end gaps formed between the nut 20 and the bearing 30.

In the present embodiment, the bearing 30 has two ends, and a gap is formed between each of the two ends of the bearing 30 and the nut 20, so that by providing two sealing members 40, the two sealing members 40 are respectively disposed in two end gaps formed between the nut 20 and the bearing 30, and thus, by providing the sealing members 40 at the two ends of the bearing 30, the lubricating fluid is confined in the grooves, and the lubricating fluid is prevented from leaking, and the sealing members 40 are rubber rings.

Further, an end portion internal tooth 33 is provided at an end portion of the bearing 30, an end portion external tooth 21 is provided on an outer surface of the nut 20 at a position corresponding to the end portion internal tooth 33, the end portion external tooth 21 and the end portion internal tooth 33 are engageable with each other, and the rubber ring is provided between the end portion external tooth 21 and the end portion internal tooth 33.

In this embodiment, through be in the tip of bearing 30 is provided with tip internal tooth 33 nut 20 surface corresponds the position of tip internal tooth 33 is provided with tip external tooth 21, and will the rubber circle set up in tip external tooth 21 with between the tip internal tooth 33 when tip external tooth 21 with tip internal tooth 33 intermeshing, tip external tooth 21 with tip internal tooth 33 extrudes the rubber circle, because the rubber circle has elasticity, can give the tip external tooth 21 with the opposite effort of tip internal tooth 33, so, guarantee tip external tooth 21, tip internal tooth 33 and the cohesion between the rubber circle, guarantee the rubber circle can not drop easily, also can improve the leakproofness of slot.

Further, the nut-rotating ball screw further includes: at least one driving assembly (not shown) in transmission connection with the nut 20 to drive the nut 20 to rotate.

In this embodiment, the driving assembly is in transmission connection with the nut 20 to drive the nut 20 to rotate, the nut 20 drives the balls to roll, and the balls push the screw rod 10 to perform linear operation, so that the rotational motion of the nut 20 is converted into the linear motion of the screw rod 10.

Further, the nut 20 extends out of the gear portion 22 toward the outside of the bearing 30, and the driving assembly includes: a transmission gear (not shown) that meshes with the gear portion 22; and the transmission gear is arranged on an output shaft of the motor (not shown).

In this embodiment, the nut 20 extends out of the gear portion 22 to the bearing 30, the transmission gear meshes with the gear portion 22, and the transmission gear is disposed on the output shaft of the motor, the output shaft of the motor drives the transmission gear to rotate, the transmission gear drives the nut 20 to rotate through the gear portion 22, so as to realize the driving action of the driving component on the nut 20, wherein the motor may be disposed on the bearing 30. It will be appreciated that the motor may also rotate the nut 20 by means of a belt.

Furthermore, two ends of the nut 20 respectively extend out of the two gear portions 22 towards the outside of the bearing 30, the number of the driving assemblies is two, and a transmission gear of each driving assembly is meshed with each gear portion 22.

In this embodiment, by providing two sets of driving components, each of which is meshed with each of the gear portions 22, the two sets of driving components drive the nut 20 to rotate from two ends of the nut 20, thereby improving the driving force and accuracy of the rotation of the nut 20.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. A nut-rotating ball screw, comprising:

the screw rod is sleeved with a nut, and a ball is arranged between the screw rod and the nut;

the bearing is sleeved on the nut, a groove for the ball to move circularly is formed in the bearing and the nut, and a lubricating opening communicated with the groove is formed in the bearing;

a seal provided between ends of both the nut and the bearing to prevent the lubricating liquid flowing in from the lubricating opening from flowing out.

2. The nut-rotating ball screw according to claim 1, wherein said lubrication opening is opened in plural, and plural of said lubrication openings are opened in both side walls in a radial direction of said bearing.

3. The nut-rotating ball screw according to claim 2, wherein said lubrication openings are provided at equal intervals in an axial direction of said bearing.

4. The nut-rotating ball screw of claim 1, further comprising:

a plug inserted into the lubrication opening to block the lubrication opening.

5. The nut-rotating ball screw according to claim 1, wherein said sealing members are two, and two of said sealing members are respectively provided in two end gaps formed between said nut and said bearing.

6. The nut-rotating ball screw of claim 5, wherein said seal is a rubber ring.

7. The nut-rotating ball screw according to claim 6, wherein said bearing has an end portion inner tooth provided at an end portion thereof, said nut outer surface is provided with an end portion outer tooth at a position corresponding to said end portion inner tooth, said end portion outer tooth and said end portion inner tooth are mutually engageable, and said rubber ring is provided between said end portion outer tooth and said end portion inner tooth.

8. The nut-rotating ball screw of claim 1, further comprising:

and the driving component is in transmission connection with the nut so as to drive the nut to rotate.

9. The nut-rotating ball screw of claim 8, wherein said nut extends beyond said bearing for a gear portion, said drive assembly comprising:

a transmission gear that meshes with the gear portion;

the transmission gear is arranged on an output shaft of the motor.

10. The nut-rotating ball screw according to claim 9, wherein said nut has two gear portions extending from opposite ends thereof toward said bearing, and said drive assemblies are provided in two sets, each of said drive gears being engaged with each of said gear portions.