CN210661254U

CN210661254U - Embedded internal circulation ball nut and multi-circulation high-load ball screw assembly

Info

Publication number: CN210661254U
Application number: CN201921275884.6U
Authority: CN
Inventors: 李敬宇; 李一前; 陈宣匀
Original assignee: SHENZHEN WEIYUAN PRECISION TECHNOLOGY Ltd
Current assignee: SHENZHEN WEIYUAN PRECISION TECHNOLOGY Ltd
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2020-06-02
Anticipated expiration: 2029-08-06

Abstract

The utility model provides an embedded inner loop ball nut and multicycle high load ball screw are vice, wherein embedded inner loop ball nut improves the bearing capacity through the ball in two closed loops that the spiral chamber raceway of two embedded circulators and intercommunication is constituteed, and embedded circulator and nut body gomphosis are as an organic whole, and the circulation path of ball goes on at the internal portion of nut. The circulator is of a two-half split structure, the ball returning path is longer than that of a common circulator, the placing quantity is less, and the mounting holes of the circulator are reduced, so that the rigidity of the nut is enhanced, the high-speed and low-noise effect can be achieved, the compact design can reduce the outer diameter of the nut, and the effects of saving space and fine appearance are achieved.

Description

Embedded internal circulation ball nut and multi-circulation high-load ball screw assembly

Technical Field

The utility model belongs to the technical field of the accurate circulation ball screw in the mechanical transmission technique is vice, especially, relate to an embedded inner loop ball nut and multicycle high load ball screw are vice.

Background

The ball screw pair is a core functional component of high-end equipment and is also an irreplaceable key matching part of a numerical control machine tool and a mechanical and electrical integration product. A typical ball screw assembly consists of a screw, a nut, a steel ball, a circulator, and the like. The main function is to convert the rotary motion into the linear motion or convert the torque into the axial repeated acting force, and the device has the characteristics of high precision, reversibility and high efficiency.

In a ball screw pair with a conventional lead, each circle of steel balls of a nut is provided with an independent circulator, and due to the fact that the number of the circulators is large, the steel balls are frequently loaded and unloaded when entering and leaving the circulators. Therefore, the operation flexibility is poor, the load capacity is relatively weak, noise is easy to generate, and the influence on the whole service life is caused by long-time operation.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides an embedded inner loop ball nut is applied to the screw through ball registrate epaxially, include:

the device comprises a nut body and two embedded circulators detachably connected with the nut body;

embedding grooves are respectively formed in the symmetrical positions of the two ends of the outer peripheral surface of the nut body; the size of the embedded circulator is matched with that of the embedded groove and can be embedded into the embedded groove;

the inner circumferential surface of the nut body is provided with a nut thread groove corresponding to the screw thread groove on the outer circumference of the screw shaft along the axial direction;

the nut thread groove can be matched and butted with the screw thread groove to form two independent spiral cavity roller paths for the movement of the balls;

each of the embedded circulators communicates with the corresponding spiral cavity raceway to constitute an independent closed loop that spirals around the axial center of the screw shaft, reciprocates in the longitudinal direction so that the nut body reciprocates in the longitudinal direction of the screw shaft when the screw shaft rotates, wherein the balls in each of the circulators circulate in the corresponding closed loop.

Preferably, a U-shaped channel for the movement of the balls is arranged in the embedded circulator;

after the screw shaft and the nut body are assembled, the U-shaped channel is communicated with the corresponding spiral cavity raceway to form an independent closed loop.

Preferably, the embedded circulator includes a circulation body; two ends of the circulating body in the length direction are respectively provided with an inserting convex opening which extends and protrudes relative to the circulating body;

a ball passage for rolling the balls to circularly move is arranged in the circulating body; the inserting convex opening is communicated with the ball passage to form the U-shaped passage;

each embedded groove is internally provided with an inserting position corresponding to each inserting convex opening of the embedded circulator;

when the embedded internal circulation ball nut is assembled with the screw shaft, the embedded circulator is embedded into the embedded internal circulation ball nut, and the insertion convex opening is inserted into the insertion position corresponding to the embedding groove, so that the U-shaped channel is communicated with the corresponding spiral cavity roller path.

Preferably, a smoothly extending channel is further connected to the front end of each plugging convex opening;

the opening directions of the smoothly extending channels of the two plugging convex openings in each embedded circulator are different;

when the balls circularly move in the U-shaped channel inside, the smoothly extending channels at the front ends of the two inserting convex ports of the embedded circulator are respectively butted with the two inserting positions corresponding to the spiral cavity raceway, and the smoothly extending channels of the inserting convex ports can be used as process ports to receive the balls in the spiral cavity raceway or used as return ports to discharge the balls to the spiral cavity raceway.

Preferably, two side surfaces of the circulating body in the length direction are respectively provided with a limiting track and a clamping piece connected with the limiting tracks

Embedded screens corresponding to the limiting rails on the two sides of the embedded circulator in the length direction are arranged in the embedded grooves;

when the embedded circulator is embedded into the nut body, the clamping piece on the limiting track is clamped into the embedded position, so that the limiting track is in butt joint with the outer edge of the embedded position.

Preferably, the embedded circulator further comprises a dismounting part arranged on the circulating body;

each embedded circulator comprises two disassembling parts which are respectively arranged on two side surfaces of the circulating body in the length direction and are connected with the limiting track.

Preferably, a dismounting position corresponding to each dismounting part of the embedded circulator is further provided in the embedding groove of the nut body.

Preferably, each individual said closed loop within said nut body spirals around the axial centre of said screw shaft for at least 3 turns.

In addition, in order to solve the above problems, the present application further provides a multi-cycle high-load ball screw assembly, which includes a screw shaft, and an embedded internal circulation ball nut as described above, which is sleeved on the screw shaft through balls.

The utility model provides an embedded internal circulation ball nut, through set up embedded circulator in the bilateral symmetry position of the nut body, and every embedded circulator communicates with corresponding spiral chamber raceway, constitute independent two closed loop around the axial center spiral of screw shaft, when the screw shaft rotates, the ball in two embedded circulators is in the circular motion of the interior queue of corresponding closed loop, when realizing nut body reciprocating motion in the length direction of screw shaft, improve bearing capacity through the ball in two closed loop that two embedded circulators and the spiral chamber raceway that communicates constitute, and, embedded circulator and nut body gomphosis are as an organic whole, the circulation path of ball is gone on in the internal portion of nut, the circulator is two half split type structure, the return pearl route of more general circulator is longer, place quantity less, circulator mounting hole has been reduced, therefore, the rigidity of the nut is enhanced, the effects of improving the load capacity, high speed and low noise can be achieved, and the compact design can reduce the size of the outer diameter of the nut, thereby achieving the effects of saving space and fine appearance.

Drawings

FIG. 1 is a schematic structural view of an embedded internal circulation ball nut of the present application;

FIG. 2 is a schematic diagram of a top view of the embedded internally recirculating ball nut of the present application;

FIG. 3 is a schematic view of a nut body according to the present application;

FIG. 4 is a schematic view in elevation of the nut body of the present application;

FIG. 5 is a schematic cross-sectional view of an embedded internal circulation ball nut of the present application;

FIG. 6 is a schematic diagram of an embedded circulator according to the present application;

FIG. 7 is a schematic diagram of an inclined bottom view of the embedded circulator of the present application;

FIG. 8 is a schematic diagram of a backside structure of an embedded circulator according to the present application;

FIG. 9 is a schematic diagram of a side position structure of the embedded circulator of the present application;

FIG. 10 is a schematic cross-sectional view of an embedded circulator according to the present application;

FIG. 11 is a schematic view of an assembly structure of the recirculating ball screw assembly of the present application;

FIG. 12 is a schematic cross-sectional view of a recirculating ball screw assembly of the present application;

FIG. 13 is an exploded view of the recirculating ball screw assembly of the present application;

FIG. 14 is a schematic view of the embedded circulator of the recirculating ball screw assembly of the present application;

reference numerals:

name (R)	Numbering	Name (R)	Numbering
				Nut body	1	Limiting rail	22
Embedded groove	11	Clamping piece	23
				Nut thread groove	12	Detachable part	24
Plug-in position	13	Assembled cover	25
				Embedded card position	14	Butt joint groove	26
Dismounting position	15	Butt joint convex plug-in unit	27
				Embedded circulator	2	U-shaped groove	21a
U-shaped channel
		21	Screw shaft	3
Circulation body					211	Screw thread groove	31
	Inserting convex opening	212	Spiral cavity raceway	4
Ball passage					213
	Smoothly extending channel	214

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

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1:

referring to fig. 1-10, an embedded internal circulation ball nut, applied to a screw shaft 3 engaged by balls, includes a nut body 1 and two embedded circulators 2 detachably connected to the nut body 1;

embedding grooves 11 are respectively formed in symmetrical positions at two ends of the outer peripheral surface of the nut body 1; the size of the embedded circulator 2 is matched with that of the embedded groove 11, and the embedded circulator can be embedded into the embedded groove 11;

a nut thread groove 12 corresponding to a screw thread groove 31 on the outer periphery of the screw shaft 3 is axially formed on the inner peripheral surface of the nut body 1;

the nut thread groove 12 can be matched and butted with the screw thread groove 31 to form two independent spiral cavity roller paths 4 for ball movement;

each of the embedded circulators 2 communicates with the corresponding spiral cavity raceway 4 to constitute an independent closed loop that spirals around the axial center of the screw shaft, and reciprocates in the longitudinal direction so that the nut body 1 reciprocates in the longitudinal direction of the screw shaft when the screw shaft rotates, wherein the balls in each of the circulators circulate in the corresponding closed loop.

After the nut body 1 and the embedded circulator 2 are combined, the nut body can be sleeved outside the screw shaft 3, a nut thread groove 12 is formed in the nut body 1, a screw thread groove 31 is formed outside the screw shaft 3, the nut thread groove 12 is matched with the screw thread groove 31, and a spiral cavity raceway 4 for sliding of the ball array is formed after assembly. The spiral cavity roller paths 4 are communicated with embedded circulators, and each circulator is independently communicated with the corresponding spiral cavity roller path 4 to form an independent closed loop.

The balls in each closed loop slide only in the helical cavity raceway 4 and the circulator in the closed loop.

The circulator is a device for circulating the balls therein. In the embodiment, the traditional external or internal circulator is changed into an embedded two-half split structure; the circulator is a two-half detachable device which can be embedded into the nut body 1 and integrated with the nut body 1 after assembly. The embedded circulator 2 is integrally fitted to the nut body 1, and a circulation path of balls formed by the screw shaft in the nut body 1 is formed inside the nut body 1, thereby achieving the effects of improving load capacity, high speed, and low noise. Meanwhile, due to the compact design, the outer diameter of the nut can be reduced, and the effects of space saving and compact appearance are achieved.

In the embedded internal circulation ball nut provided in this embodiment, a metal injection molding process is adopted, that is, a mixture of metal powder and a binder is used as a raw material, the mixture in a viscous state is injected into a mold cavity by an injection machine at a certain temperature, speed and pressure, a preform with a certain shape and size is obtained by cooling, shaping and demolding, and a product with certain mechanical and physical properties is obtained by removing the binder and sintering.

Compared with the conventional circulator, the circulator applied to the embedded internal circulation ball nut provided by the embodiment has essential difference in sintering process, the circulator applied to the embedded internal circulation ball nut in the embodiment is combined in two-half symmetry, and a combined sintering process is adopted, namely two prefabricated blanks are combined into a complete closed circulation loop at first during sintering and then sintered and shaped, so that the precision of the inner loop of the circulator and the integral rigidity are improved.

The size of the insertion groove 11 in the above-mentioned insertion groove is matched with the size of the insertion circulator 2. Further, the shape of the embedded circulator 2 may be a bar shape corresponding to a specific number of internal circulation cycles, and a corresponding liquid level bar shape of the embedding groove 11.

The embodiment provides an embedded type internal circulation ball nut, wherein two symmetrical embedded type circulators 2 are arranged on the periphery of a nut body 1, each circulator is communicated with a corresponding independent spiral cavity raceway 4 to form a plurality of independent closed loops which spiral around the axial center of a screw shaft, when the screw shaft rotates, balls in the embedded type circulators 2 circularly slide in the corresponding closed loops, when the embedded type internal circulation ball nut reciprocates in the length direction of the screw shaft, the load capacity is improved by the balls in the closed loops formed by the two embedded type circulators 2 and the communicated spiral cavity raceways 4, the embedded type circulators are embedded into the nut body 1, the circulation path of the balls is performed in the nut body 1, because the circulators are of a two-half split structure, the ball return path is longer than that of a common circulator, the placing quantity is small, the mounting holes of the circulator are reduced, so that the rigidity of the nut is enhanced, the effects of improving the load capacity, high speed and low noise can be achieved, and the compact design can reduce the outer diameter of the nut to achieve the effects of saving space and fine appearance. The setting of multicycle ware to and the setting of embedded circulator 2, compare traditional single-end ball, it is efficient to transmit, and transmission moment of torsion is little, can realize quick transmission or location.

Example 2:

referring to fig. 1 to 10, based on the above embodiment 1, this embodiment provides an embedded internal circulation ball nut, in which a U-shaped channel 21 for the movement of the balls is provided in the embedded circulator 2;

after the screw shaft and the nut body 1 are assembled, the U-shaped channel 21 is communicated with the corresponding spiral cavity raceway 4 to form an independent closed loop.

The U-shaped channel 21 is a space which has a U shape and can be combined with the nut body 1 for the balls to circularly move in the inner queue thereof.

Further, the embedded circulator 2 includes a circulation body 211; two ends of the circulating body 211 in the length direction are respectively provided with an inserting convex opening 212 which extends and protrudes relative to the circulating body 211;

a ball passage 213 for rolling the balls to move circularly is arranged in the circulating body 211; the inserting convex opening 212 is communicated with the ball passage 213 to form the U-shaped passage 21;

each insertion groove 11 is internally provided with an insertion position 13 corresponding to each insertion convex opening 212 of the embedded circulator 2;

when the embedded internal circulation ball nut is assembled with the screw shaft 3, the embedded circulator 2 is embedded into the embedded internal circulation ball nut, and the insertion convex port 212 is inserted into the insertion position 13 corresponding to the insertion groove 11, so that the U-shaped channel 21 is communicated with the corresponding spiral cavity raceway 4.

The circulation body 211 is a main body of the circulator, and a ball passage 213 for moving balls is provided therein, and both ends of the circulation body 211 in the longitudinal direction are respectively provided with a socket protrusion 212 which extends and protrudes toward the nut body 1 when mounted, and the socket protrusion 212 is a protrusion which is abutted against the corresponding socket 13. When the connector is installed and butted, the inserting convex opening 212 is inserted into the embedded groove 11 and is inserted into the corresponding inserting position 13 to extend into the spiral cavity roller path 4, so that on one hand, the circulator and the nut can play a role in fixing when being assembled due to the fact that the convex opening extends into the spiral cavity roller path 4, stability is improved, and falling off is prevented; on the other hand, the convex mouth is deep into the spiral cavity raceway 4, so that the running path of the ball is smoother, the moving path of the ball is extended into the spiral cavity raceway 4 through the ball channel 213, the phenomenon that the ball is blocked when moving from the ball channel 213 to the spiral cavity raceway 4 is avoided, and the running stability and the smooth effect of the ball are further improved.

Furthermore, a smooth extending channel 214 is connected to the front end of each insertion convex opening 212;

the opening directions of the smoothly extending channels 214 of the two plugging convex openings 212 in each embedded circulator 2 are different;

when the balls circularly move in the U-shaped channel 21 inside, the smoothly extending channels 214 at the front ends of the two insertion convex ports 212 of the embedded circulator 2 are respectively butted with two corresponding insertion positions of the spiral cavity raceway 4, and the smoothly extending channels 214 of the insertion convex ports 212 can be used as a process port to receive the balls in the spiral cavity raceway 4 or used as a return port to discharge the balls to the spiral cavity raceway 4.

At the front end of each plugging convex opening 212, a smooth extending channel 214 is further provided, and in one embedded circulator 2, the opening directions of the smooth extending channels 214 of the two plugging convex openings 212 are different, for example, one towards the upper end as a process opening and one towards the lower end as a return opening. Due to the difference of the opening directions, the circulator can receive or discharge the balls in the spiral cavity raceway 4, so that the internal balls are circulated.

Above-mentioned, the opening that the grafting position of spiral chamber raceway corresponds, for the nut flows the ball mouth promptly, in the technology of nut and circulator processing, need ensure the butt joint of tight silk seam between the two (circulator butt joint to the spiral chamber raceway of nut) to realize the smooth roll of accessible of inside ball, this wherein need through a large amount of to the ball mouth that flows of nut and circulator with flow the ball mouth butt joint interface repeatedly many times's the work of polishing, waste time and labor, improved the cost of processing cost and machine part itself greatly.

In this embodiment, an inserting position is provided in the embedded internal circulation ball nut to connect with the internal circulation channel, and on the other hand, a smooth extension channel 214 is provided at the front end of the inserting convex opening of the embedded circulator 2, and since the directions of the ball entering and rolling out are different during circulation, the directions of the openings of the upper and lower smooth extension channels are different to each other, thereby playing a role of guiding the ball. And the smooth extension channel is directly butted with the spiral cavity raceway, the smooth extension channel is deeply inserted into the inserting position and enters the spiral cavity raceway, and the U-shaped channel of the embedded circulator extends into the spiral cavity raceway in the nut, so that in the processing process, the inserting position (a nut ball flow port) of the nut and the inserting convex port of the embedded circulator do not need to be repeatedly polished, deeply processed and repaired, only the inserting position is required to be butted with the smooth extension channel at the front end of the corresponding inserting convex port, the U-shaped channel of the embedded circulator extends into the spiral cavity raceway in the nut through the smooth extension channel, the embedded circulator is more conveniently assembled, the nut ball flow port and the circulator do not need to be repaired, the working hour is saved, the efficiency is improved, the dust is reduced, and the embedded circulator is beneficial to environmental protection.

Further, two side surfaces of the circulating body 211 in the length direction are respectively provided with a limiting track 22 and a clamping piece 23 connected with the limiting track 22

The embedded groove 11 is internally provided with embedded screens 14 corresponding to the limiting rails 22 at the two sides of the embedded circulator 2 in the length direction;

when the embedded circulator 2 is embedded into the nut body 1, the clamping piece 23 on the limiting rail 22 is clamped into the embedded position-blocking part 14, so that the limiting rail 22 is in butt joint with the outer edge of the embedded position-blocking part 14.

In order to ensure that the embedded circulator 2 can be fixed and limited on the nut body 1, in this embodiment, a limiting rail 22 and a clamping member 23 are respectively disposed at two side positions of the circulator, the clamping member 23 is connected to the limiting rail 22, the clamping member 23 can be a clamping rod, and a corresponding embedded position 14 is disposed in the embedded groove 11, when the circulator is assembled, the limiting rail 22 is butted against the embedded position 14, the clamping member 23 is clamped against the embedded position 14, and the limiting rail 22 is butted against the outer edge of the embedded position 14. Through spacing track 22 and joint spare 23 and the cooperation joint of embedding screens 14 to realize further fixed and spacing to the circulator, improve the stability after the installation.

Further, the embedded circulator 2 further comprises a dismounting part 24 arranged on the circulating body 211;

each of the embedded circulators 2 includes two of the detachable members 24, which are respectively disposed on two side surfaces of the circulating body 211 in the length direction and are connected to the limiting rail 22.

As described above, in this embodiment, the circulator is a detachable device, and when the circulator is installed in the corresponding embedded groove 11, one or more handheld portions need to be provided to facilitate the detachment and installation of the circulator for a user. In this embodiment, the two side end faces of the circulating body 211 are respectively provided with the dismounting part 24, so that a user can conveniently install and dismount the circulator by holding the dismounting parts 24 on the two sides.

Further, the nut body 1 is provided with a mounting/dismounting position 15 corresponding to each of the mounting/dismounting members 24 of the built-in circulator 2 in the built-in groove 11.

In order to facilitate the disassembly and assembly of the circulator, in the embodiment, the disassembly and assembly position 15 is further provided at a position corresponding to the disassembly and assembly part 24 in the insertion groove 11, so that a user can conveniently put fingers or related tools into the position, and the circulator can be disassembled and assembled more conveniently.

Further, each individual closed loop within the nut body 1 spirals around the axial center of the threaded shaft for at least 3 turns.

As described above, in the conventional ball screw assembly nut, a single thread is generally used, the number of turns of rotation around the axial center of the screw shaft is generally 3, and a certain number of cycles is required to achieve a certain load effect, but if the number of turns is too large, the length of the nut body 1 of the ball screw assembly becomes too long, so that in the case where the length of the screw shaft 3 is fixed, the too long length of the nut body 1 shortens the stroke distance of the axial movement of the screw shaft 3, and a great influence is exerted on the movement of converting the rotational movement into the linear movement or the torque into the axial repeated force.

In order to solve the problem that the number of circulation turns and the stroke distance of the traditional ball screw pair cannot be considered, in the embodiment, 2 circulators are arranged and are respectively arranged on two sides of the outer end face of the nut body 1, each circulator independently forms an independent circulation loop of the ball, each circulation loop is at least 3 turns around the central screw shaft, and the two circulation loops form at least 6 turns of circulation turns, so that on the basis that the axial length of the nut body 1 is fixed, the circulation loops are changed from one of the existing screw pair into two independent circulations, and each circulation loop has at least 3 independent turns, the load capacity is greatly improved on the basis that the length of the nut body 1 is ensured, the torque is reduced, and quick transmission or positioning can be realized.

In addition, the long waist circulator comprises two symmetrically arranged assembling covers which are detachably connected; each assembling cover comprises symmetrical cover bodies, and a U-shaped groove is formed in each cover body; and the two U-shaped grooves in the cover body are matched, and after the two assembled covers are assembled and combined, the two U-shaped grooves are butted to form the U-shaped channel.

Two U-shaped grooves 21a are respectively arranged in the two assembling covers 25, the two U-shaped grooves 21a are also symmetrically arranged, and after the two assembling covers 25 are butted, the inner U-shaped grooves 21a are combined to form a U-shaped channel 111. The long waist-shaped circulator provided in the embodiment is detachably connected with the nut, and is also detachable; when the screw pair needs to be disassembled, the middle part is divided into two parts to obtain two symmetrical assembling covers 25, maintenance work such as maintenance and replacement of the inner ball can be carried out, and convenience is provided for the maintenance work of the whole screw pair.

In addition, the assembling cover 25 is provided with a clamping device on the end surface which is different from the U-shaped groove 21a and is in butt joint with the symmetrical assembling cover 25;

the clip connection may include a mating recess 26, and a mating male plug 27; the size of the butt joint convex plug connector 27 is matched with the size of the space in the cavity of the butt joint groove 26; moreover, in each assembly cover 25, a mating groove 26 and a mating convex plug-in connector for mating are respectively provided, and the positions and mating targets of the convex plug-in connector and the mating groove 26 in the opposite mateable assembly cover 25 are matched.

Namely, in the assembly cover 25A, a convex plug connector is arranged at the upper end, and a butt joint groove 26 is arranged at the lower end; and in the B assembly cover 25, the upper end corresponding to the A assembly cover 25 is provided with a butt-joint groove 26, and the line segment is a convex plug connector. The two assembling covers 25 are respectively provided with the butt joint groove 26 and the protruding plug connector which can be correspondingly matched and plugged, so that the problem that the circulator is damaged or inconvenient to maintain and install due to the wrong plugging position 131 is solved. On the other hand, the two assembling covers 25 are connected more tightly through the symmetrically arranged protruding plug connectors and the butt joint grooves 26, so that the stability of the circulator assembled by the assembling covers 25 is improved, and the problem of failure of the circulator in the using process caused by poor tightness and tightness of connection of the detachable circulator is solved.

In addition, referring to fig. 11-13, the present application further provides a multi-cycle high-load ball screw assembly, which includes a screw shaft 3, and an embedded internal circulation ball nut as described above, which is sleeved on the screw shaft through balls.

The multi-cycle high-load ball screw pair can be prepared by the following preparation method, and comprises the following steps:

s1, carrying out 1500 ℃ heat treatment on the raw materials and checking,

s2, cold rolling and forming the arc-shaped threads of the screw;

s3, grinding the circular arc thread excircle of the screw rod;

s4, manufacturing and grinding a central hole of the screw rod by taking the ground circular arc-shaped thread excircle of the screw rod as a reference;

s5, grinding the circular arc thread roller path of the screw rod by taking the ground circular arc thread outer circle of the screw rod as a positioning reference and taking the center hole as an auxiliary reference;

s6, carrying out low-temperature aging treatment at minus eighty ℃ and checking;

s7, roughly grinding the nut raceway;

s8, preparing an embedded circulator; and S9, assembling, running in and checking.

In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and it is not to be understood that the specific embodiments of the present invention are limited to these descriptions. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement.

Claims

1. The utility model provides an embedded inner loop ball nut, is applied to on the screw shaft through ball registrate, its characterized in that includes:

the device comprises a nut body and two embedded circulators connected with the nut body;

embedding grooves are respectively formed in the symmetrical positions of the two ends of the peripheral surface of the nut body; the size of the embedded circulator is matched with that of the embedded groove and can be embedded into the embedded groove;

a nut thread groove corresponding to the screw thread groove on the outer periphery of the screw shaft is axially arranged on the inner peripheral surface of the nut body;

2. The embedded internal circulation ball nut of claim 1, wherein a U-shaped channel for movement of the balls is provided in the embedded circulator;

3. The embedded internal circulation ball nut of claim 2,

the embedded circulator comprises a circulating body; two ends of the circulating body in the length direction are respectively provided with an inserting convex opening which extends and protrudes relative to the circulating body;

4. The embedded internal circulation ball nut of claim 3,

the front end of each splicing convex opening is also connected with a smooth extending channel;

5. The embedded internal circulation ball nut of claim 4,

two side surfaces of the circulating body in the length direction are respectively provided with a limiting track and a clamping piece connected with the limiting track;

6. The embedded internal circulation ball nut of claim 5,

the embedded circulator also comprises a dismounting part arranged on the circulating body;

7. The embedded internal circulation ball nut of claim 6,

and the embedded groove of the nut body is also internally provided with a dismounting position corresponding to each dismounting part of the embedded circulator.

8. The embedded internal circulation ball nut of claim 7,

each individual said closed loop within said nut body spirals around an axial center of said threaded shaft for at least 3 turns.

9. A multi-cycle high load ball screw assembly comprising a screw shaft, and an embedded internally circulating ball nut of any one of claims 1 to 8 fitted over the screw shaft via balls.