CN210003765U

CN210003765U - Reverser, ball screw with reverser and linear sliding rail

Info

Publication number: CN210003765U
Application number: CN201920192747.XU
Authority: CN
Inventors: 谭波
Original assignee: Hongfujin Precision Industry Hengyang Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Hengyang Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2019-02-12
Filing date: 2019-02-12
Publication date: 2020-01-31
Anticipated expiration: 2029-02-12
Also published as: TWM593482U

Abstract

kind of reversers, be applied to drive mechanism on, drive mechanism includes the transmission main part, moving member and a plurality of rolling element, the moving member gomphosis is in the transmission main part, transmission main part and moving member are equipped with the motion track of the transmission groove of matcing in order to form a plurality of rolling elements respectively, the moving member is equipped with the step hole of intercommunication transmission groove, the reverser sets up on the surface of moving member, and the both ends of reverser can imbed the step downthehole, the reverser is equipped with the recoverable groove that link up, and two track sections opposite in motion direction communicate in recoverable groove and the motion track in order to form the circulation track of a plurality of rolling elements, the partial lateral wall in recoverable groove extends in order to form the fan-shaped portion that meets with the transmission inslot wall of moving member, and the area reduces gradually towards the transmission main part.

Description

Reverser, ball screw with reverser and linear sliding rail

Technical Field

The utility model relates to an kind of transmission structures especially relate to kind of reversers and have ball and the linear slideway of this reverser.

Background

The ball screw and the linear slide rail adopt an inverter to guide a plurality of rolling bodies to realize circular movement. The existing reverser generally adopts an internal return groove, and two ends of the return groove are communicated with the spiral grooves of the nut and the screw shaft so as to guide the rolling bodies to enter the reverser and then to be recycled into the spiral grooves. However, the rolling body directly moves into the return groove from the spiral groove, and the rolling body directly moves into the return groove from the spiral groove in the load area, so that the rolling body is greatly stressed to cause poor motion stability.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide types of reversers that improve the stability of motion.

reversers applied to a transmission mechanism, the transmission mechanism comprises a transmission main body, a moving part and a plurality of rolling bodies, the moving part is embedded on the transmission main body, the transmission main body and the moving part are respectively provided with a matched transmission groove to form a motion track configured with a plurality of rolling bodies, the moving part is provided with a step hole communicated with the transmission groove, the reversers are arranged on the outer surface of the moving part, two ends of each reverser can be embedded into the step hole, each reverser is provided with a through return groove, the return grooves are communicated with two track sections with opposite motion directions in the motion track to form a plurality of circulation tracks of the rolling bodies, and partial side walls of the return grooves extend towards the transmission main body to form fan-shaped parts which are connected with the inner wall of the transmission groove of the moving part and the area of which is gradually reduced.

, the return slot is tangent to the inner wall of the drive slot.

, a positioning plane is arranged at the end of the sector facing the stepped hole, the positioning plane can be abutted against the stepped surface of the stepped hole to position the reverser on the moving member in the radial direction, and the peripheral wall of the sector is provided with a positioning peripheral surface which is attached to the side wall of the stepped hole to position the reverser on the moving member in the peripheral direction.

, a part of the surface of the positioning peripheral surface is protruded to form a drawing part with an angle inclined at relative to the positioning peripheral surface, and a part of the side wall of the stepped hole is recessed to form an avoiding hole to accommodate the drawing part.

, the reverser is divided into two divided bodies which are arranged in a central symmetry mode, each divided body is provided with a direction changing part arranged on the outer surface of the moving part and guiding parts arranged on two sides of the direction changing part, the two guiding parts can be embedded into the step holes, the two direction changing parts are respectively and oppositely provided with a curved groove, the two guiding parts are respectively provided with a second curved groove communicated with the curved groove, and the curved groove and the second curved groove form the return groove.

Further , at least pairs of convex and concave parts are provided facing each other.

, the sides of the two direction-changing parts, which deviate from the moving part, sides respectively extend in opposite directions to form cover plates, and the two cover plates can cover the joint of the two direction-changing parts.

, the reverser is divided into a carrier and a gland, the gland can cover the carrier and press the carrier on the moving member, the carrier includes a connection portion and guide portions disposed on two sides of the connection portion, the gland includes a second connection portion and second guide portions disposed on two sides of the second connection portion, the connection portion and the second connection portion are respectively provided with a third curved slot in opposite directions, the guide portion and the second guide portion are respectively provided with a fourth curved slot in opposite directions, and the third curved slot and the fourth curved slot form the return slot.

A ball screw comprises a screw shaft, a nut externally fitted on the screw shaft, a plurality of rolling elements, and an inverter, wherein the screw shaft has a spiral groove on its outer peripheral surface, the nut has a second spiral groove matching the spiral groove on its inner peripheral surface to form a th running track in which the plurality of rolling elements are disposed, the nut has two th stepped holes communicating with the second spiral groove at an interval, the inverter is disposed on its outer surface, and has two ends capable of fitting into the th stepped holes, the inverter has a through return groove communicating with two track sections of the running track in opposite directions to form a plurality of circulating tracks for the rolling elements, and a sector area of the return groove is convexly disposed on a part of the side wall of the return groove toward the screw shaft.

Linear slide rail, including the slide rail body, the slider, a plurality of rolling elements and a plurality of reversers, two side walls of the slide rail body are equipped with the spout in opposite directions, the slider is embedded in the slide rail body, the side wall of the slider is equipped with the second spout towards the spout, the slider is equipped with through hole near each second spout, the through hole, the spout and the second spout form the second movement track configured with a plurality of rolling elements, the reversers include the reversing seat and the sealing cover, the sealing cover can cover the reversing seat and press the reversing seat on the slider, the reversing seat and the sealing cover are equipped with the fifth curved groove in opposite directions to form the return groove, the return groove is communicated with two track sections with opposite movement directions in the second movement track to form the circulation track of a plurality of rolling elements, two sides of the slider are equipped with the second stepped hole towards the return groove, and the side wall of the return groove can be embedded in the second stepped hole, the part of the second stepped hole extends towards the second chute and forms the sector-shaped reducing area.

The ball screw uses the reverser to set the sector to ensure that the stress of the track formed by the spiral groove and the second spiral groove of the rolling element in the loading area is gradually changed when the track enters and exits the reverser, so that the rolling element moves stably.

Drawings

Fig. 1 is an exploded perspective view of a ball screw according to an embodiment of the present invention.

Fig. 2 is a perspective view of the th divided body of the ball screw removal inverter shown in fig. 1 and half-cut through a nut.

Fig. 3 is a perspective sectional view of a nut of the ball screw shown in fig. 1.

Fig. 4 is an exploded perspective view of the ball screw inverter shown in fig. 1.

Fig. 5 is a perspective exploded view of a reverser according to a second embodiment of the present invention.

Fig. 6 is a perspective view of the ball screw shown in fig. 5 with the screw shaft and the carrier of the inverter removed and the nut half-sectioned.

Fig. 7 is an exploded perspective view of a linear slide rail according to a third embodiment of the present invention.

Fig. 8 is a partially enlarged schematic view of the linear slide of fig. 7 at VIII.

Fig. 9 is an enlarged partial schematic view of the linear slide at IX of fig. 7.

Fig. 10A is a schematic diagram of the force analysis of the rolling elements in the transmission body and the moving member according to the present invention.

Fig. 10B is a schematic view of the force analysis when the rolling element part contacts the segment in the present invention.

Fig. 10C is a schematic diagram of the force analysis of the rolling elements in the reverser according to the present invention.

Description of the main elements

Ball screw 100, 100'

Screw shaft 101

th spiral groove 1011

Nut 103

Second spiral groove 1031

Accommodation groove 1033

Threaded bore 1035

th stepped bore 1037

Avoidance hole 1039

Rolling bodies 105

Fastener 107

th inverter 200

th divided body 21

Direction changing portions

211, 231

Mounting holes

2111, 2311

th

curved groove

2113, 2313

Guide 212, 232

Second

curved grooves

2121, 2321

Sectors

213, 233, 35, 55

Locating plane 2131, 2331

Positioning

peripheral surfaces

2133, 2333

The mold-

drawing parts

214, 234

Profiling

215, 235

Convex parts 216, 236

Recesses 217, 237

Cover plates

218, 238

Second divided body 23

Second inverter 300

Carrier block 31

th connection part 311

Third

curved groove

3111, 3311

-th guide part 313

Fourth

curved groove

3131, 3331

Gland 33

Second connecting portion 331

Second guide part 333

Linear slide 400

Slide rail body 401

th chute 4011

Slider 403

Second chute 4031

Through hole 4033

Second stepped hole 4035

Third inverter 500

Reverse seat 51

Fifth

curved grooves

511, 531

Cover 53

The following detailed description will proceed to in conjunction with the above-described figures.

Detailed Description

The technical solution 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 partial embodiments of , but not all embodiments.

It should be noted that when components are considered to be "connected" to another components, it may be directly connected to another components or there may be centrally located components at the same time, when components are considered to be "disposed on" another components, it may be directly disposed on another components or there may be centrally located components at the same time.

The terminology used herein in the description of the present invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, the terminology used herein "and/or" includes any and all combinations of or more of the associated listed items.

Referring to fig. 1 and 2, in an th embodiment of the present invention, a driving mechanism is ball screws 100, a driving body is a screw shaft 101, a moving member is a nut 103, the ball screws 100 include the screw shaft 101, the nut 103, a plurality of rolling elements 105 and a inverter 200, a spiral spiral groove 1011 is formed on an outer circumferential surface of the screw shaft 101, the nut 103 is externally embedded on the screw shaft 101, a second spiral groove 1031 matched with the spiral groove 1011 is formed on an inner circumferential surface of the nut 103, the spiral groove 1011 and the second spiral groove 1031 form a th moving track configured with the plurality of rolling elements 105, the nut 103 is a circular nut, but is not limited thereto, the outer surface of the nut 103 is recessed to form a accommodating groove 1033 to accommodate the inverter 200, and the rolling elements 105 are spherical.

With continued reference to fig. 3 and 4, in the th embodiment, the th reverser 200 is divided along the moving track of the rolling elements 105 in the th reverser 200 to form a th divided body 21 and a second divided body 23, the th divided body 21 and the second divided body 23 are identical in structure and are arranged centrosymmetrically, but not limited thereto, the th divided body 21 is provided with a direction changing part 211 mounted on the outer surface of the nut 103, the second divided body 23 is provided with a direction changing part 231 mounted on the outer surface of the nut 103, two step holes 1037 are arranged on the outer surface of the nut 103 at intervals, the step holes 1037 are respectively communicated with the second spiral groove 1031, the direction changing part 211 and the direction changing part 231 protrude toward the nut 103 to form a guide part 212 and a guide part 232, and the guide part 212 and the guide part 232 can be embedded into the corresponding step holes 1037.

Referring to fig. 1, the direction-changing portion 211 has at least mounting holes 2111, the direction-changing portion 231 has at least mounting holes 2311, the bottom wall of the receiving groove 1033 has a plurality of threaded holes 1035, and the -th split body 21 and the second split body 23 are fixed to the nut 103 by screwing fasteners 107 through the mounting

holes

2111, 2311 and the threaded holes 1035.

The direction changing part 211 and the direction changing part 231 are respectively provided with th curved grooves 2113 and th curved grooves 2313 in an opposite way, the guide part 212 and the guide part 232 are respectively provided with second

curved grooves

2121 and 2321 in an opposite way, the th curved grooves 2113, the th curved grooves 2313, the second curved grooves 2121 and the second curved grooves 2321 form return grooves through which the th reverser 200 passes, and the second curved grooves 2121 and the second curved grooves 2321 are respectively communicated with two track sections in the motion track of the in opposite directions, namely the second curved grooves 2121 and the second curved grooves 2321 are respectively communicated with spiral grooves 1011 on both sides of the screw shaft 101 to form a circulating track of the plurality of rolling bodies 105.

Referring to fig. 4, the -th inverter 200 has a return groove with two end side walls extending toward the screw shaft 101 to form

sectors

213 and 233 having a gradually decreasing area and contacting the inner wall of the second spiral groove 1031, in the -th embodiment, the guide 212 has a second curved groove 2121 with a sector 213 having a gradually decreasing area, the rolling element 105 has a trajectory formed by the -th spiral groove 1011 and the second spiral groove 1031 and transits through the sector 213 to/from the -th curved groove 2113 of the -th inverter 200, the guide 232 has a second curved groove 2321 with a sector 233 extending therefrom to form a sector having a gradually decreasing area, and the rolling element 105 has a trajectory formed by the -th spiral groove 1011 and the second spiral groove 1031 and transits through the sector 233 to/from/to the -th curved groove 2113 of the -th inverter 200.

Referring to fig. 3 and 4, the end of the sector 213 away from the direction-changing portion 211 is provided with a positioning plane 2131, the end of the sector 233 away from the direction-changing portion 231 is provided with a positioning plane 2231, the positioning plane 2131 and the positioning plane 2231 can respectively abut against the bottom wall of the corresponding -th stepped hole 1037 to radially position the -th reverser 200 on the nut 103, the outer peripheral wall of the sector 213 is provided with a positioning peripheral surface 2133, the outer peripheral wall of the sector 233 is provided with a positioning peripheral surface 2333, and the positioning peripheral surface 2133 and the positioning peripheral surface 2333 respectively abut against the corresponding side wall of the -th stepped hole 1037 to circumferentially position the -th reverser 200 on the nut 103.

Referring to fig. 3 and 4, a portion of the positioning circumferential surface 2133 protrudes to form a mold-drawing portion 214 with an angle inclined with respect to the positioning circumferential surface 2133, a portion of the positioning circumferential surface 2333 protrudes to form a mold-drawing portion 234 with an angle inclined with respect to the positioning circumferential surface 2333, two -th stepped holes 1037 respectively form relief holes 1039 corresponding to the sidewall recesses of the mold-drawing portion 214 and the mold-drawing portion 234 to accommodate the mold-drawing portion 214 and the mold-drawing portion 234, the mold-drawing portion 214 and the mold-drawing portion 234 facilitate the mold-forming of the -th split body 21 and the second split body 23.

Referring to fig. 4, the direction-changing portion 211 is provided with a convex portion 216 and a concave portion 217 toward the direction-changing portion 231, and the direction-changing portion 231 is provided with a convex portion 236 and a concave portion 237 toward the direction-changing portion 211, but the convex portion 216 can be fitted with the concave portion 237, and the concave portion 217 can be fitted with the convex portion 236 to improve the degree of fitting of the split body 21 and the second split body 23.

Referring to fig. 4, the side of the direction changing part 211 and the direction changing part 231 departing from the nut 103 extends oppositely to form a cover plate 218 and a cover plate 238, respectively, the cover plate 218 and the cover plate 238 can cover the joint of the direction changing part 211 and the direction changing part 231, so as to prevent external impurities from entering the circulation orbit of the rolling element 105 through the joint of the direction changing part 211 and the direction changing part 231.

Referring to fig. 5, the guide 212 is provided with a profiling part 215 profiling the outer peripheral surface of the screw shaft 101 and the th spiral groove 1011 toward the side of the screw shaft 101, the guide 232 is provided with a profiling part 235 profiling the outer peripheral surface of the screw shaft 101 and the th spiral groove 1011 toward the side of the screw shaft 101 to increase the wall thickness of the side wall of the return groove and improve the strength of the guide 212 and the guide 232 carrying the rolling body 105, the profiling part 215 and the profiling part 235 have a distance from the outer peripheral surface of the screw shaft 101 and the th spiral groove 1011, respectively, to avoid friction when the nut 103 and the reverser 200 move relative to the screw shaft 101.

Referring to fig. 2, the return groove of the th inverter 200 is tangent to the inner walls of the th and

second spiral grooves

1011 and 1031, respectively, but not limited thereto, in the th embodiment, the second curved groove 2121 is tangent to the inner wall of the orbit formed by the th and

second spiral grooves

1011 and 1031, the rolling element 105 is stably transited from the th and

second spiral grooves

1011 and 1031 to the second curved groove 2121, i.e., the return groove of the th inverter 200, the second curved groove 2321 is tangent to the inner wall of the orbit formed by the th and

second spiral grooves

1011 and 1031, and the rolling element 105 is stably transited from the th and

second spiral grooves

1011 and 1031 to the second curved groove 2321, i.e., the return groove of the th inverter 200.

Referring to fig. 5 and 6, in a second embodiment of the present invention, a transmission mechanism includes ball screws 100 ', a transmission body includes a screw shaft 101, a moving member includes a nut 103, the ball screws 100 ' include the screw shaft 101, the nut 103, a plurality of rolling bodies 105 and a second inverter 300, the ball screws 100 ' and the ball screws 100 are different in structure between the th inverter 200 and the second inverter 300, the second inverter 300 is divided into a carriage 31 and a gland 33, the gland 33 can cover the carriage 31 and press the carriage 31 against the nut 103, the carriage 31 includes a th connecting portion 311 and a guide 313 disposed on both sides of the th connecting portion 311, the gland 33 includes the second connecting portion 331 and a second guide portion 333 disposed on both sides of the second connecting portion 331, the th connecting portion 311 and the second connecting portion 331 are respectively opened with a third curved groove 3111 and a third curved groove 3311, the second guide portion 313 and the second guide portion 333 are opened with the second curved groove 31, the third curved groove 3111 and the fourth curved groove 333131 are opened with the second curved groove 31, and the curved groove 31 are opened with the curved groove 31, and the track 21 are opened with the curved groove 31, and the track 21, and the track are opened with the track 310.

Referring to fig. 5 and 6, the partial side walls of both ends of the return groove through which the second reverser 300 passes extend toward the screw shaft 101 to form sectors 35 that are in contact with the inner wall of the second spiral groove 1031 and have gradually reduced areas, and the orbit of the rolling element 105 formed by the th spiral groove 1011 and the second spiral groove 1031 passes through the sectors 35 and enters/exits the return groove of the second reverser 300.

Referring to fig. 7, in a third embodiment of the present invention, the transmission mechanism is linear sliding rails 400, the transmission main body is a sliding rail main body 401, the moving member is a sliding block 403, the linear sliding rail 400 includes a sliding rail main body 401, a sliding block 403, a plurality of rolling elements 105 and a plurality of third reversers 500, two side walls of the sliding rail main body 401 are oppositely provided with a sliding slot 4011, the sliding block 403 is embedded in the sliding rail main body 401, the side wall of the sliding block 403 is correspondingly provided with a second sliding slot 4031 facing the sliding slot 4011, the sliding block 403 is respectively provided with through holes 4033 adjacent to each second sliding slot 4031, and each through hole 4013 forms a second motion track configured with a plurality of rolling elements 105 with the adjacent sliding slot 4011 and the second sliding slot 4031.

Referring to fig. 7 to 9, the third reverser 500 includes a reverse seat 51 and a cover 53, the cover 53 can cover the reverse seat 51 and press the reverse seat 51 against the slide block 403, the reverse seat 51 and the cover 53 are respectively provided with a fifth curved groove 511 and a fifth curved groove 531 in opposite directions to form a return groove through which the third reverser 500 passes, both ends of the return groove through which the third reverser 500 passes communicate with two track segments in the second motion track in opposite directions, respectively, in the third embodiment, both ends of the return groove through which the third reverser 500 passes communicate with tracks formed by the through holes 4033, the sliding grooves 4011 and the second sliding grooves 4031, respectively, to form a circulation track for the plurality of rolling elements 105.

A plurality of second stepped holes 4035 are formed in the return groove through which the third reverser 500 passes on both sides of the slider 403, a sector 55 having a gradually decreasing area and connected to the second chute 4031 is formed by extending part of the side walls of both ends of the return groove through which the third reverser 500 passes toward the second stepped hole 4035, and the rolling elements 105 are transferred from the orbit formed by the th chute 4011 and the second chute 4031 to the return groove and the through hole 4033 formed by the fifth curved groove 511 and the fifth curved groove 531 of the third reverser 500 through the sector 55.

Referring to fig. 10A, 10B and 10C, in the th embodiment, the transmission body is a lead screw shaft 101, the moving member is a nut 103, the rolling element 105 moves from the orbit formed by the th spiral groove 1011 and the second spiral groove 1031 in the load region to the orbit formed by the segment 213 and a part of the second spiral groove 1031 of the nut 103, and gradually transits into the orbit formed by the th curved groove 2113 and the th curved groove 2312 in the non-load region, the segment 213 gradually reduces the stress applied to the rolling element 105, and the stress gradually increases when the rolling element 105 returns to the orbit formed by the th spiral groove 1011 and the second spiral groove 1031 in the load region by the -th reverser 200.

Referring to fig. 10A, 10B and 10C, in the second embodiment, the transmission body is a screw shaft 101, the moving member is a nut 103, the rolling element 105 orbits by the th spiral groove 1011 and the second spiral groove 1031 in the load region to the sector 35 orbits by part of the second spiral groove 1031 of the nut 103, and gradually transits into the orbit formed by the third curved groove 3111 and the third curved groove 3311 in the non-load region, the sector 35 gradually reduces the stress on the rolling element 105, and the stress is gradually increased when the rolling element 105 returns to the orbit formed by the th spiral groove 1011 and the second spiral groove 1031 in the load region by the second reverser 300.

Referring to fig. 10A, 10B and 10C, in the third embodiment, the transmission body is a sliding rail body 401, the moving member is a sliding block 403, the rolling element 105 moves from the track formed by the th sliding slot 4011 and the second sliding slot 4031 in the load area to the track formed by the sector 55 and a part of the second sliding slot 4031, and gradually transits into the return slot of the third reverser 500 formed by the fifth curved slot 511 and the fifth curved slot 403531, the sector 55 gradually reduces the force applied to the rolling element 105, and the force applied to the rolling element 105 is gradually increased when the rolling element 105 returns from the third reverser 500 to the track formed by the th sliding slot 4011 and the second sliding slot 4031 in the load area.

In the ball screw 100, 100', the

sectors

213, 233, 35 are provided by the

reversers

200, 300 so that the force applied to the rolling element 105 by the track in-and-out

reversers

200, 300 formed by the th spiral groove 1011 and the second spiral groove 1031 in the load zone is gradually changed to stabilize the movement of the rolling element 105. in the linear slide rail 400, the sector 55 is provided by the reverser 500 so that the force applied to the track in-and-out reverser 500 formed by the th sliding groove 4011 and the second sliding groove 4031 in the load zone is gradually changed to stabilize the movement of the rolling element 105.

In addition, other changes may be made by those skilled in the art without departing from the spirit of the invention, and it is intended that all such changes be considered within the scope of the invention.

Claims

reverser applied to transmission mechanism, the transmission mechanism includes transmission body, moving part and multiple rolling bodies, the moving part is embedded on the transmission body, the transmission body and the moving part are respectively provided with matched transmission grooves to form a motion track configured with multiple rolling bodies, the moving part is provided with a step hole communicated with the transmission grooves, the reverser is characterized in that the reverser is arranged on the outer surface of the moving part, two ends of the reverser can be embedded into the step hole, the reverser is provided with a through return groove, the return groove is communicated with two track sections with opposite motion directions in the motion track to form a plurality of circulation tracks of the rolling bodies, and partial side wall of the return groove extends towards the transmission body to form a sector part which is connected with the inner wall of the transmission groove of the moving part and has gradually reduced area.
2. The inverter of claim 1, wherein: the return groove is tangent to the inner wall of the transmission groove.
3. The reverser according to claim 1, wherein the sector is provided with a positioning flat surface facing end of the stepped hole, the positioning flat surface can abut against the stepped surface of the stepped hole to radially position the reverser on the moving member, and the outer peripheral wall of the sector is provided with a positioning peripheral surface which is in contact with the side wall of the stepped hole to circumferentially position the reverser on the moving member.
4. The reverser according to claim 3, wherein a portion of the positioning circumferential surface is protruded to form a die drawing portion with being inclined at an angle of degrees with respect to the positioning circumferential surface, and a portion of the sidewall of the stepped hole is recessed to form an avoiding hole to accommodate the die drawing portion.
5. The reverser according to claim 1 wherein the reverser is divided into two divided bodies arranged in a central symmetry, each divided body is provided with a direction changing portion mounted on the outer surface of the moving member and guiding portions provided on both sides of the direction changing portion, the two guiding portions are capable of being inserted into the stepped hole, the two direction changing portions are respectively provided with th curved grooves in opposite directions, the two guiding portions are respectively provided with second curved grooves communicated with the th curved grooves, and the th curved groove and the second curved groove form the return groove.
6. The reverser according to claim 5, wherein at least pairs of convex parts and concave parts which can be engaged are respectively arranged opposite to each other on the two direction-changing parts.
7. The reverser according to claim 5, wherein the sides of the two direction-changing parts which are away from the moving part respectively extend in opposite directions to form cover plates, and the two cover plates can cover the joint of the two direction-changing parts.
8. The reverser according to claim 1, wherein the reverser is divided into a carriage and a gland, the gland can cover the carriage and press the carriage on the moving member, the carriage comprises an th connecting part and th guide parts respectively arranged at two sides of the th connecting part, the gland comprises a second connecting part and second guide parts respectively arranged at two sides of the second connecting part, the th connecting part and the second connecting part are respectively provided with third curved grooves in opposite directions, the th guide part and the second guide part are respectively provided with fourth curved grooves in opposite directions, and the third curved grooves and the fourth curved grooves form the return grooves.
9, ball screw, including a screw shaft, a nut, a plurality of rolling bodies and an inverter, the screw shaft has a spiral th spiral groove on its outer circumference, the nut is externally embedded on the screw shaft, the nut has a second spiral groove matching with the th spiral groove on its inner circumference to form a th movement track configured with a plurality of rolling bodies, characterized in that the nut has two step holes communicated with the second spiral groove at intervals, the inverter is arranged on the outer surface of the nut, and both ends of the inverter can be embedded in the th step holes, the inverter has a through return groove, and the return groove of the inverter is communicated with two track sections in opposite movement directions in the th movement track to form a plurality of circulation tracks of the rolling bodies, and a sector part of the side wall of the return groove has a area gradually reduced towards the screw shaft.
10, linear slideway, including the slide rail body, the slider, a plurality of rolling elements and a plurality of reversers, two sidewalls of the slide rail body are equipped with the th runner in opposite directions, the slider is embedded in the slide rail body, the sidewall of the slider is equipped with the second runner towards the th runner correspondingly, the slider is equipped with through hole near each second runner respectively, the through hole, the th runner and the second runner form the second movement track configured with a plurality of rolling elements, characterized in that, the reversers include the reversing seat and the closing cap, the closing cap can cover the reversing seat and press the reversing seat on the slider, the reversing seat and the closing cap are equipped with the fifth curved groove in opposite directions to form the return groove respectively, the return groove is communicated with two track sections in opposite movement direction in the second movement track to form the circulation track of a plurality of the rolling elements, two sides of the slider are equipped with the second return hole towards the return groove respectively, and end side wall of the return groove can be embedded in the second stepped hole, the second stepped hole extends towards the second runner and gradually reduces the area of the second sliding groove.