阅读说明：本技术 一种滚珠丝杠副 (Ball screw pair ) 是由 不公告发明人 于 2019-10-11 设计创作，主要内容包括：本发明属于机械传动技术领域,具体的说是一种滚珠丝杠副,包括丝杆和螺母总成,所述丝杆的外壁中螺旋开设有螺旋槽,丝杆的中部通过钢珠转动连接有转接块；所述转接块内开设有填充槽；所述填充槽开设为圆环状,填充槽的内部填充有润滑油,填充槽的内壁均匀开设有液流孔；本发明主要用于解决现有技术中的滚珠丝杠副在工作时会对钢珠产生较大的摩擦导致其发生较大的损耗,且需要通过人工添加润滑油的方式来降低摩擦力,大大提高了工作时的人力物力消耗,且需要在润滑油消耗殆尽后继续人工添加导致不利于生产工作顺利进行的问题。(The invention belongs to the technical field of mechanical transmission, and particularly relates to a ball screw pair which comprises a screw rod and a nut assembly, wherein a spiral groove is spirally formed in the outer wall of the screw rod, and the middle part of the screw rod is rotatably connected with a transfer block through a steel ball; a filling groove is formed in the adapter block; the filling groove is arranged in a circular ring shape, lubricating oil is filled in the filling groove, and liquid flow holes are uniformly formed in the inner wall of the filling groove; the ball screw pair is mainly used for solving the problems that in the prior art, a ball screw pair generates large friction on steel balls during working, so that large loss is caused, friction is reduced in a manner of manually adding lubricating oil, manpower and material resource consumption during working is greatly improved, and manual addition is required to be continued after the lubricating oil is completely consumed, so that smooth production is not facilitated.)

1. The utility model provides a ball screw is vice, includes lead screw (1) and nut assembly (2), its characterized in that: a spiral groove (11) is spirally formed in the outer wall of the screw rod (1), and the middle part of the screw rod (1) is rotatably connected with a transfer block (21) through a steel ball (12); a filling groove (22) is formed in the transfer block (21), and the transfer block (21) belongs to one part of the nut assembly (2); the filling groove (22) is arranged in a circular ring shape, lubricating oil is filled in the filling groove (22), and liquid flow holes (23) are uniformly formed in the inner wall of the filling groove (22).

2. A ball screw assembly according to claim 1, wherein: the cross section of the liquid flow hole (23) is in the shape of an inverted round table, and the inner end opening of the liquid flow hole (23) is larger than the outer end opening.

3. A ball screw assembly according to claim 1, wherein: the interior of the steel ball (12) is hollow, and extrusion blocks (13) are symmetrically connected in the wall of the steel ball (12) in a sliding manner; the inner ends of the extrusion blocks (13) are elastically connected through springs.

4. A ball screw assembly according to claim 1, wherein: the inner wall of the filling groove (22) is uniformly embedded with extrusion bags (24); the squeezing bag (24) is arranged between the liquid flow holes (23), and the interior of the squeezing bag (24) is filled with cooling liquid.

5. The ball screw assembly of claim 4, wherein: an expansion opening (25) is formed in the outer end of the extrusion bag (24); the expansion opening (25) is arranged in the inner wall of the filling groove (22).

6. A ball screw assembly according to claim 3, wherein: the extrusion block (13) is made of hard rubber material.

Technical Field

The invention belongs to the technical field of mechanical transmission, and particularly relates to a ball screw pair.

Background

The ball screw assembly is a screw mechanism having balls as rolling elements, and a plurality of balls are interposed between a screw shaft and a screw nut to receive and transmit a load. Compare in the sliding screw pair, the ball screw pair has transmission efficiency height, advantages such as transmission precision height, consequently, the ball screw pair obtains the wide application in fields such as lathe, in prior art's ball screw pair, because the during operation lead screw can be in high-speed rotating state, so be equivalent to the switching piece promptly can be connected with the lead screw with a high-speed rotatory state, can produce great frictional force to the steel ball in the switching piece promptly, thereby cause the degree of wear of steel ball to increase fast, and present stage is usually reduced the frictional loss to the steel ball by artifical additional lubrication oil, but this kind of artifical mode of adding has undoubtedly improved the job task volume greatly, need continue to add after lubricating oil consumption is totally spent simultaneously, extremely be unfavorable for going on of production work.

Disclosure of Invention

In order to make up for the defects of the prior art, the invention provides a ball screw pair. The ball screw pair is mainly used for solving the problems that in the prior art, a ball screw pair generates large friction on steel balls during working, so that large loss is caused, friction is reduced in a manner of manually adding lubricating oil, manpower and material resource consumption during working is greatly improved, and manual addition is required to be continued after the lubricating oil is completely consumed, so that smooth production is not facilitated.

The technical scheme adopted by the invention for solving the technical problems is as follows: the ball screw pair comprises a screw rod and a nut assembly, wherein a spiral groove is spirally formed in the outer wall of the screw rod, and the middle part of the screw rod is rotatably connected with a transfer block through a steel ball; a filling groove is formed in the adapter block, and the adapter block belongs to a part of the nut assembly; the filling groove is arranged in a circular ring shape, lubricating oil is filled in the filling groove, and liquid flow holes are uniformly formed in the inner wall of the filling groove; when the ball screw pair starts to work, can produce great frictional force to the steel ball in the switching piece promptly, even make the steel ball can heat the switching piece, because of having seted up the filling groove in the switching piece, the filling groove is seted up for the ring form, the inside packing in filling groove has lubricating oil, the liquid flow hole has evenly been seted up to the inner wall in filling groove, so can lead to the lubricating oil in the filling groove to be in the active state because of heat transfer at the during operation, and finally enter into the lead screw and the linking steel ball department of switching piece through the liquid flow hole, very big reduction the frictional force between ball and switching piece and the lead screw, the friction consumption of ball has been reduced promptly, simultaneously because the higher certain cooling effect that still can play of lubricating oil boiling point to switching piece inside.

The cross section of the liquid flow hole is in an inverted round table shape, and the opening at the inner end of the liquid flow hole is larger than the opening at the outer end; when lubricating oil passes through between the liquid flow hole entering ball, be the round platform form of falling because of the cross section of liquid flow hole, and the inner opening of liquid flow hole is bigger than the outer end opening, so can receive certain barrier force when lubricating oil flows out to fill the inslot, strengthen the consumption control to lubricating oil promptly by a wide margin, can also keep the steel ball to be in lubricated state all the time simultaneously, further improve the guard effect to the steel ball.

The interior of the steel ball is hollow, and extrusion blocks are symmetrically connected in the wall of the steel ball in a sliding manner; the inner ends of the extrusion blocks are elastically connected through springs; when the ball is heated up by friction during operation, because of the inside setting of steel ball is the cavity form, so the air in the inside cavity of steel ball can be in active state, simultaneously because of the symmetry sliding connection has the extrusion piece in the wall of steel ball, the inner of extrusion piece passes through spring elastic connection, so steel ball during operation rotation can be occasionally because of atmospheric pressure reason with the extrusion piece outside promotion, release the hot-air of inside promptly, and play certain stirring effect to the lubricating oil in the outside through the hot-air of release, ensure that lubricating oil is in active state all the time.

The inner wall of the filling groove is uniformly embedded with extrusion bags; the extrusion bag is arranged between the liquid flow holes, and cooling liquid is filled in the extrusion bag; when the inside extrusion piece of steel ball is because atmospheric pressure effect when sliding to the outside, because of evenly inlaying the extrusion bag of installing in the inner wall of filling the groove, so can produce an extrusion effect to the extrusion bag when the extrusion piece slides to the outside, establish between the liquid flow hole because of the extrusion bag simultaneously, and the inside packing of extrusion bag has the coolant liquid, so can reduce the temperature of steel ball fast when ball and extrusion bag contact, ensure the temperature stability of during operation.

An expansion port is formed in the outer end of the extrusion bag; the expansion opening is formed in the inner wall of the filling groove; when its inside extrusion piece produced the extrusion force to the extrusion bag in the steel ball working process, because of the expansion mouth has been seted up to the outer end of extrusion bag, the expansion mouth is seted up in the inner wall of filling the groove, so can outwards expand when the extrusion bag receives the extrusion force, plays an extrusion effect to the lubricating oil in the filling groove promptly, ensures that lubricating oil is stable to be carried toward the outside through the discharge orifice, ensures the lubrication action to the steel ball.

The extrusion block is made of hard rubber materials; when the extrusion block in the steel ball generates extrusion force on the extrusion bag, the extrusion block is made of hard rubber materials, so that the friction force between the steel ball and the extrusion bag can be greatly increased when the extrusion block is contacted with the extrusion bag, the friction force between the steel ball and the switching block is indirectly increased, the rotating speed between the switching block and the screw rod is limited to a certain degree, and the screw rod is prevented from being broken due to the fact that the switching block and the screw rod are in a high-speed moving state.

The invention has the following beneficial effects:

1. when the ball screw pair starts to work, can produce great frictional force to the steel ball in the switching piece promptly, even make the steel ball can heat the switching piece, because of having seted up the filling groove in the switching piece, the filling groove is seted up for the ring form, the inside packing in filling groove has lubricating oil, the liquid flow hole has evenly been seted up to the inner wall in filling groove, so can lead to the lubricating oil in the filling groove to be in the active state because of heat transfer at the during operation, and finally enter into the lead screw and the linking steel ball department of switching piece through the liquid flow hole, very big reduction the frictional force between ball and switching piece and the lead screw, the friction consumption of ball has been reduced promptly, simultaneously because the higher certain cooling effect that still can play of lubricating oil boiling point to switching piece inside.

2. When lubricating oil passes through between the liquid flow hole entering ball, be the round platform form of falling because of the cross section of liquid flow hole, and the inner opening of liquid flow hole is bigger than the outer end opening, so can receive certain barrier force when lubricating oil flows out to fill the inslot, strengthen the consumption control to lubricating oil promptly by a wide margin, can also keep the steel ball to be in lubricated state all the time simultaneously, further improve the guard effect to the steel ball.

3. When the ball is heated up by friction during operation, because of the inside setting of steel ball is the cavity form, so the air in the inside cavity of steel ball can be in active state, simultaneously because of the symmetry sliding connection has the extrusion piece in the wall of steel ball, the inner of extrusion piece passes through spring elastic connection, so steel ball during operation rotation can be occasionally because of atmospheric pressure reason with the extrusion piece outside promotion, release the hot-air of inside promptly, and play certain stirring effect to the lubricating oil in the outside through the hot-air of release, ensure that lubricating oil is in active state all the time.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a side view of the present invention;

FIG. 3 is a schematic diagram of the junction block of FIG. 2 according to the present invention;

FIG. 4 is an enlarged view of a portion of the invention at A in FIG. 3;

in the figure: the screw rod 1, the spiral groove 11, the steel ball 12, the extrusion block 13, the nut assembly 2, the adapter block 21, the filling groove 22, the liquid flow hole 23, the extrusion bag 24 and the expansion port 25.

Detailed Description

A ball screw assembly according to an embodiment of the present invention will be described below with reference to fig. 1 to 4.

As shown in fig. 1-4, the ball screw assembly of the present invention comprises a screw rod 1 and a nut assembly 2, wherein a spiral groove 11 is spirally formed in an outer wall of the screw rod 1, and a transfer block 21 is rotatably connected to a middle portion of the screw rod 1 through a steel ball 12; a filling groove 22 is formed in the switching block 21, and the switching block 21 belongs to a part of the nut assembly 2; the filling groove 22 is annular, lubricating oil is filled in the filling groove 22, and liquid flow holes 23 are uniformly formed in the inner wall of the filling groove 22; when the ball screw pair starts to work, a large friction force can be generated on the steel ball 12 in the transfer block 21, namely the steel ball 12 can heat the transfer block 21, the filling groove 22 is formed in the transfer block 21 and is in a circular ring shape, lubricating oil is filled in the filling groove 22, and the liquid flow hole 23 is uniformly formed in the inner wall of the filling groove 22, so that the lubricating oil in the filling groove 22 is in an active state during working due to heat transmission, and finally enters the position of the link steel ball 12 of the screw rod 1 and the transfer block 21 through the liquid flow hole 23, the friction force between the ball and the transfer block 21 and the screw rod 1 is greatly reduced, namely the friction consumption of the ball is reduced, and meanwhile, a certain cooling effect can be achieved on the inside of the transfer block 21 due to the high boiling point of the lubricating oil.

The cross section of the liquid flow hole 23 is in an inverted round table shape, and the inner end opening of the liquid flow hole 23 is larger than the outer end opening; when lubricating oil gets into between the ball through liquid flow hole 23, because of the cross section of liquid flow hole 23 is the form of the frustum of a cone, and the inner opening of liquid flow hole 23 is bigger than the outer end opening, so can receive certain barrier force when lubricating oil flows out and fills in the groove 22, strengthen the consumption control to lubricating oil promptly by a wide margin, can also keep steel ball 12 to be in lubricated state all the time simultaneously, further improve the protection effect to steel ball 12.

The steel ball 12 is hollow, and extrusion blocks 13 are symmetrically connected in the wall of the steel ball 12 in a sliding manner; the inner ends of the extrusion blocks 13 are elastically connected through springs; when the ball is heated by friction during operation, because the inside of the steel ball 12 is hollow, the air in the inner cavity of the steel ball 12 can be in an active state, meanwhile, because the extruding blocks 13 are symmetrically and slidably connected in the wall of the steel ball 12, and the inner ends of the extruding blocks 13 are elastically connected through springs, the extruding blocks 13 are pushed outwards due to air pressure at intervals when the steel ball 12 rotates during operation, that is, the hot air in the inside is released, and the released hot air plays a certain stirring role on the lubricating oil on the outer side, so that the lubricating oil is ensured to be in the active state all the time.

The inner wall of the filling groove 22 is uniformly embedded with extrusion bags 24; the extrusion bag 24 is arranged between the liquid flow holes 23, and the interior of the extrusion bag 24 is filled with cooling liquid; when the extrusion block 13 inside the steel ball 12 slides outwards due to the air pressure, the extrusion bag 24 is uniformly embedded and installed on the inner wall of the filling groove 22, so that the extrusion block 13 can generate an extrusion effect on the extrusion bag 24 when sliding outwards, meanwhile, the extrusion bag 24 is arranged between the liquid flow holes 23, and the cooling liquid is filled inside the extrusion bag 24, so that the temperature of the steel ball 12 can be quickly reduced when the ball is in contact with the extrusion bag 24, and the temperature stability during working is ensured.

An expansion port 25 is formed at the outer end of the extrusion bag 24; the expansion opening 25 is formed in the inner wall of the filling groove 22; when the extrusion block 13 inside the steel ball 12 generates extrusion force on the extrusion bag 24 in the working process, the expansion port 25 is formed in the outer end of the extrusion bag 24, and the expansion port 25 is formed in the inner wall of the filling groove 22, so that the extrusion bag 24 can expand outwards when being subjected to the extrusion force, namely, the extrusion action is performed on the lubricating oil in the filling groove 22, the lubricating oil is ensured to be stably conveyed outwards through the liquid flow hole 23, and the lubricating action on the steel ball 12 is ensured.

The extrusion block 13 is made of hard rubber material; when the extrusion block 13 in the steel ball 12 generates extrusion force on the extrusion bag 24, the extrusion block 13 is made of hard rubber material, so that the friction force between the steel ball 12 and the extrusion bag 24 can be greatly increased when the extrusion block 13 is in contact with the extrusion bag 24, and the friction force between the steel ball 12 and the switching block 21 is indirectly increased, so that the rotating speed between the switching block 21 and the screw rod 1 is limited to a certain extent, and the screw rod 1 is prevented from being broken due to the high-speed motion state between the switching block 21 and the screw rod 1.

The specific working process is as follows:

when the ball screw pair starts to work, a large friction force is generated on the steel ball 12 in the transfer block 21, namely the steel ball 12 heats the transfer block 21, because the transfer block 21 is internally provided with the filling groove 22, the filling groove 22 is annular, the filling groove 22 is filled with lubricating oil, and the inner wall of the filling groove 22 is uniformly provided with the liquid flow holes 23, the lubricating oil in the filling groove 22 is in an active state due to heat transmission during work and finally enters the position of the steel ball 12 connecting the screw rod 1 and the transfer block 21 through the liquid flow holes 23, so that the friction force between the ball and the transfer block 21 and the screw rod 1 is greatly reduced, namely the friction consumption of the ball is reduced, meanwhile, a certain cooling effect is achieved on the inside of the transfer block 21 due to the high boiling point of the lubricating oil, when the lubricating oil enters the ball through the liquid flow holes 23, the cross section of the liquid flow holes 23 is in an inverted round table shape, and the inner end opening of the liquid flow hole 23 is larger than the outer end opening, so that when the lubricating oil flows out of the filling groove 22, a certain blocking force is applied, namely, the consumption control of the lubricating oil is greatly enhanced, meanwhile, the steel ball 12 can be kept in a lubricating state all the time, and the protection effect on the steel ball 12 is further improved.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.