CN111365431A

CN111365431A - Mobile platform assembly for linear module and linear module

Info

Publication number: CN111365431A
Application number: CN202010305460.0A
Authority: CN
Inventors: 沈科跃; 张卫平; 魏巍
Original assignee: Figunes Automation Co ltd; Ningbo Longsheng Automation Equipment Technology Co ltd
Current assignee: Figunes Automation Co ltd; Ningbo Longsheng Automation Equipment Technology Co ltd
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2020-07-03

Abstract

The invention discloses a closed high-rigidity precision linear module which comprises a moving platform assembly, a guide rail base used for sliding the moving platform assembly, and a ball screw arranged on the moving platform assembly. The movable platform assembly comprises a sliding seat and a cover plate fixedly arranged at the top end of the sliding seat, the sliding seat is provided with a first oil duct and a second oil duct which are communicated with each other, and a third oil duct communicated with the second oil duct, the second oil duct penetrates through the bottom of the sliding seat, and the third oil duct forms an oil filling hole in the sliding seat, so that lubricating oil can lubricate the sliding seat and the guide rail base. The invention adopts a fully-sealed structure, which can effectively improve the dustproof effect of the module; the guide rail base is provided with two rows of outer grooves, the sliding seat is provided with two rows of inner grooves, equal prepressing is applied, and rigidity in four directions is increased while a lower friction coefficient is maintained.

Description

Mobile platform assembly for linear module and linear module

Technical Field

The invention belongs to the field of mechanical equipment, and particularly relates to a movable platform assembly for a linear module and the linear module.

Background

The linear module is a linear transmission device, is widely applied to the field of automation industry and is used for realizing linear motion. Linear modules in the market at present mainly comprise transmission combinations of a linear bearing, an optical axis, a linear guide rail, a ball screw, a synchronous belt and the like, a platform is guided by a servo motor or a stepping motor to realize linear reciprocating movement, so that position control and transmission control are realized, and the linear modules can be divided into steel structure modules (abbreviated as kk modules) and embedded modules (abbreviated as kA modules) according to the structure of the modules. However, the existing KK module has the defects of large processing difficulty, difficulty in overlong guide rails, heavy weight, high cost, poor dustproof effect and the like, and the KA module has the defects of large grinding difficulty, high cost, incapability of achieving the processing precision of steel structure guide rails, difficulty in overlong guide rails, insufficient rigidity, limitation of installation occasions, poor guide rail bonding reliability and the like.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a mobile platform assembly which is used for a linear module and can realize lubrication on the mobile platform assembly through a first oil duct and a second oil duct which are communicated; the second oil duct runs through the sliding seat, so that the linear module of the mobile platform assembly can be lubricated, and the service life of the product can be prolonged under a good oil adding and lubricating environment.

The mobile platform assembly comprises a sliding seat and a cover plate fixedly arranged at the top end of the sliding seat, wherein the sliding seat is provided with a first side surface and a second side surface opposite to the first side surface, and a mounting hole extending from the first side surface to the second side surface is formed; at least two first oil passages are arranged on the sliding seat along the axial direction of the mounting hole, and the first oil passages are symmetrically arranged on two sides of the mounting hole, extend from the first side surface to the second side surface and do not penetrate through the second side surface; the sliding seat is provided with at least two second oil ducts along the radial direction of the mounting hole, the second oil ducts are opened on the top surface of the sliding seat, extend from the top surface of the sliding seat to the bottom surface of the sliding seat, are communicated with the first oil ducts and penetrate through the sliding seat.

Preferably, the first oil passage is two, and the second oil passage is two.

By adopting the scheme, the mounting holes are used for fixedly mounting the ball screws, and the ball screws drive the moving platform to slide; the first oil duct is communicated with the second oil duct, so that the movable platform assembly can be lubricated, and under the condition of opening the cover plate, lubricating oil can be added through an opening of the second oil duct at the top of the sliding seat, so that the lubricating oil can enter the second oil duct to the first oil duct to lubricate the sliding seat; the second oil duct penetrates through the sliding seat and can lubricate a linear module provided with the mobile platform assembly, specifically, lubricating oil is added through an opening of the second oil duct positioned at the top of the sliding seat, and the lubricating oil can flow into the guide rail base through an opening of the second oil duct positioned at the bottom of the sliding seat, so that the guide rail base is lubricated and the service life of a product is prolonged; the sliding seat can be protected by the cover plate, a dustproof effect is achieved, and the service life of a product is prolonged.

Furthermore, the sliding seat comprises a clamping block for clamping and fixing with the cover plate, a middle block provided with the mounting hole, and inner sliding blocks symmetrically arranged on two sides of the middle block; the side surface of the middle block is formed by enclosing the first side surface, the second side surface, a third side surface and a fourth side surface which is arranged opposite to the third side surface; the third side surface extends towards the direction far away from the clamping block and the direction far away from the middle block to form a first sliding block, the fourth side surface extends towards the direction far away from the clamping block and the direction far away from the middle block to form a second sliding block, and the first sliding block and the second sliding block are combined to form the inner sliding block; the lower half part of the sliding seat is internally tangent to a first side surface towards a second side surface to form a first end surface, the length formed between the first side surface and the second side surface is greater than the length formed between the first end surface and the second side surface, and one side, close to the clamping part, of the first end surface comprises a partial arc section; the cross section of the clamping block is concave, and the transverse length of the bottom surface of the clamping block exceeds the top surface of the middle block.

By adopting the scheme, the clamping part is arranged for clamping with the cover plate, and the sliding seat is sealed by clamping the cover plate with the clamping part, so that the dustproof effect is achieved, and the service life of a product is further prolonged; the middle block is provided with a mounting hole for mounting a ball screw, and the ball screw drives the moving platform to slide; the arrangement of the inner sliding block can realize the sliding of the mobile platform assembly on the guide rail base; the first end face is formed to be beneficial to the fixed installation of the ball circulator, and the fitting degree between the ball circulator and the sliding seat is enhanced.

Furthermore, at least one oil filling hole is formed in any side surface of the clamping block, and the oil filling hole extends through the other side surface of the clamping block opposite to the clamping block to form a third oil duct; the third oil duct is communicated with the second oil duct; the cover plate is clamped with the clamping block and then located at the oil filling hole, and the cover plate is provided with an opening.

Preferably, the oil filling hole is one.

Adopt above-mentioned scheme, the setting of tank filler hole, accessible the tank filler hole carries lubricating oil in the sliding seat and on the guide rail base, need not to unpack apart the curb plate and can operate, the good lubricated environment of refueling can improve the life of product.

Furthermore, the first sliding block and the second sliding block are provided with at least two through holes along the axial direction of the mounting hole.

Preferably, the number of the through holes is two.

By adopting the scheme, the through holes are used for fixedly mounting the ball circulator, so that the circulating motion of the balls is realized.

The mobile platform assembly has the beneficial effects that:

(1) the first oil duct is communicated with the second oil duct, and the second oil duct is communicated with the third oil duct, so that the movable platform assembly can be lubricated; the second oil duct penetrates through the sliding seat, so that lubrication of a linear module provided with the mobile platform assembly, specifically lubrication of a guide rail base, can be realized, and the service life of a product is prolonged.

(2) The oil filler hole can carry lubricating oil in the sliding seat and on the guide rail base, need not to unpack apart the curb plate and can operate convenient operation.

The invention also provides a closed high-rigidity precise linear module which comprises the moving platform assembly, provides a good oil-adding lubricating environment, reduces the processing difficulty, increases the length of a grinding workpiece, has the characteristics of low friction coefficient, low noise, high rigidity, good dustproof sealing effect, capability of well reducing installation errors and the like, and realizes high-precision, smooth and stable linear motion. The product can be used in any posture, and particularly can be vertically installed and cantilever-installed. The track has a wide width and a low total height, and therefore, the track can be used for a single shaft in a place where space saving, moment action, high rigidity, and the like are required.

The invention solves the technical problem by adopting a scheme that the closed high-rigidity precise linear module comprises the moving platform assembly, a guide rail base used for the moving platform assembly to slide and a ball screw arranged on the moving platform assembly; one end of the guide rail base, which is close to the mobile platform assembly, extends upwards to form a third sliding block which is matched with the first sliding block to slide and a fourth sliding block which is matched with the second sliding block to slide, and the third sliding block and the fourth sliding block are combined to form the outer sliding block; the ball screw comprises a screw rod arranged in the mounting hole of the sliding seat and a plurality of balls arranged between the inner sliding block and the outer sliding block, and the screw rod is fixedly arranged in the mounting hole of the sliding seat through a nut.

Meanwhile, one end of the screw rod of the ball screw, which extends out of the fixed end of the ball screw, is connected with a driving motor, and the driving motor can drive the ball screw to move so as to drive the moving platform assembly to slide; the motor protective cover covers the joint of the driving motor and the screw rod, so that the service life of the product can be prolonged.

By adopting the scheme, the outer sliding block and the inner sliding block are clamped and mounted, so that the sliding of the mobile platform assembly on the guide rail base can be realized; the setting of ball screw can drive the sliding motion of moving platform subassembly, and is specific the lead screw passes through the nut is installed on the sliding seat, can realize the linear motion of moving platform subassembly, the ball sets up interior slider with between the outer slider, the linear motion on the track base is realized to the motion of moving platform subassembly accessible ball.

Furthermore, a ball circulator for circulating and rolling balls is arranged at the position, located on the inner sliding block, of the sliding seat; one side of the ball circulator extends to form a cylinder which is fixedly matched with the through hole, and the same side of the ball circulator extends to form a plurality of components with track grooves and the same length as the cylinder; the ball circulators are symmetrically arranged at two ends of the first sliding block and the second sliding block.

By adopting the scheme, the assembly with the rail groove can fix the ball; the arrangement of the cylinder can realize the fixed connection between the ball circulator and the sliding seat.

Furthermore, the outer sliding block is provided with a plurality of outer grooves longitudinally penetrating the outer sliding block, the inner sliding block is provided with at least two inner grooves longitudinally penetrating the inner sliding block, the inner sliding block is clamped on the outer sliding block, and the inner grooves and the outer grooves are matched to form a ball track for rolling the balls.

Further, the outer groove is arranged on one side of the third slider, which is far away from the fourth slider, and one side of the fourth slider, which is far away from the third slider; the inner groove is arranged on one side of the first sliding block close to the second sliding block and one side of the second sliding block close to the first sliding block.

Preferably, the outer slide block is provided with two rows of outer grooves, and the inner slide block is provided with two rows of inner grooves.

By adopting the scheme, the ball tracks are formed, and the circulating motion of the balls can be realized; due to the open arrangement of the outer grooves, the grinding processing difficulty is effectively reduced, and the length of a grinding workpiece is increased; the outer groove and the inner groove are both two lines and are equally pre-pressed, so that a lower friction coefficient can be maintained, the rigidity in four directions is increased, self-aligning capability is realized, the installation error can be reduced, and high-precision, smooth and stable linear motion can be obtained; and the outer groove and the inner groove have wide amplitude and low total height, so that the gravity center structure can be used for a single shaft in places needing space saving or moment action and high rigidity, and particularly can be vertically installed and cantilever-installed.

Further, the balls are uniformly spaced by the ball synchronous holders, and the balls are mounted on the ball synchronous holders to form a ball chain.

By adopting the scheme, the arrangement of the ball synchronous retainer can lead the balls to be evenly spaced.

Furthermore, one end of the guide rail base, which is close to the second side surface, is provided with a ball screw supporting end, one end of the guide rail base, which is close to the first side surface, is provided with a ball screw fixing end, one end of a screw rod of the ball screw is movably connected with the ball screw supporting end, and the other end of the screw rod of the ball screw is movably connected with the ball screw fixing end and penetrates through the ball screw fixing end; two sides of the guide rail base, which are close to the third side face and the fourth side face, extend upwards to form side plates with L-shaped cross sections, a steel belt is installed at the top end of the guide rail base, two ends of the steel belt are respectively fixed on the fixed end of the ball screw and the supporting end of the ball screw, and part of the steel belt is located between a cover plate of the mobile platform assembly and a gap of the sliding seat; the steel band, the guide rail base provided with the side plate, the ball screw supporting end and the ball screw fixing end form a closed structure.

By adopting the scheme, the steel belt, the guide rail base of the side plate, the ball screw supporting end and the ball screw fixing end form a closed structure, so that the dustproof effect of the linear module can be effectively improved.

Further, the side plates comprise a second side plate and a first side plate, wherein one end of the second side plate is installed on the guide rail base, and the first side plate is detachably installed on the second side plate; the first side plate and the second side plate are fixedly connected in a clamping manner, and a magnetic stripe is arranged at the butt joint of the first side plate and the second side plate; a silica gel plate and at least two magnets are sequentially arranged between the cover plate and the sliding seat, and correspondingly, at least two magnet mounting holes are formed in the sliding seat; the steel belt is arranged between the silica gel plate and the cover plate.

Specifically, the butt joint of the first side plate and the second side plate is provided with a buckle, and the first side plate and the second side plate are buckled through the buckle, so that the fastening degree is good.

By adopting the scheme, the side plates are arranged into the first side plate and the second side plate which are detachable, so that the linear module is convenient to install in a locking mode, and only the second side plate needs to be detached when the linear module is installed in the locking mode; the magnetic stripes at the butt joint of the first side plate and the second side plate are mutually adsorbed, so that the first side plate and the second side plate are matched more closely, and the assembly is facilitated. The arrangement of the magnets between the sliding seat and the cover plate enhances the adsorption force on the steel strip, has strong sealing property and increases the dustproof effect; the arrangement of the silica gel pad can effectively avoid the sliding friction between the steel belt and the sliding seat and reduce the running resistance and the noise; the magnet mounting hole is arranged, so that the magnet and the sliding seat can be tightly adsorbed, and noise caused by movement is avoided.

The closed high-rigidity precision linear module has the beneficial effects that:

(1) the closed high-rigidity precise linear module adopts a fully-sealed structure, and the dustproof effect of the module is effectively improved.

(2) The guide rail base is provided with an open outer groove, grinding processing difficulty is effectively reduced, and the length of a grinding workpiece is increased.

(3) The guide rail base is provided with two rows of outer grooves, the sliding seat is provided with two rows of inner grooves, and equal prepressing is applied, so that the lower friction coefficient can be maintained, the rigidity in four directions is increased, the self-aligning capability is realized, the installation error can be reduced, and high-precision, smooth and stable linear motion can be obtained; and the outer groove and the inner groove have wide amplitude and low total height, so the gravity center structure can be used on a single shaft in places needing space saving or moment action and high rigidity, and particularly can be vertically installed and cantilever installed.

Drawings

FIG. 1 is an exploded view of the mobile platform assembly of the present invention;

FIG. 2 is a schematic view of a sliding seat of the present invention;

fig. 3 is a partial cross-sectional view of the sliding seat of the present invention (which may embody the through connection of the first oil passage and the second oil passage);

fig. 4 is another partial cross-sectional view of the sliding seat of the present invention (which may embody the through connection of the third oil passage with the second oil passage);

FIG. 5 is an exploded view of the enclosed high rigidity precision linear module of the present invention;

FIG. 6 is a schematic diagram of a closed high-rigidity precision linear module according to the present invention;

FIG. 7 is a schematic view of the ball circulator of the present invention;

FIG. 8 is a schematic view of the assembly of the ball and ball synchro-retainer of the present invention;

FIG. 9 is a schematic view of the assembly of the sliding seat and the guide rail base of the present invention;

FIG. 10 is a cross-sectional view taken at A-A of FIG. 9;

FIG. 11 is a partial cross-sectional view of the closed high stiffness precision linear module of the present invention;

FIG. 12 is an enlarged view of a portion of FIG. 11 at A;

fig. 13 is an assembly view of the sliding seat and the guide rail base with side plates in embodiment 2 of the present invention;

fig. 14 is an exploded view of a mobile platform assembly in embodiment 2 of the present invention.

In the figure, the part names corresponding to the respective reference numerals are: 1. a mobile platform assembly; 11. a cover plate; 12. a sliding seat; 121. a magnet mounting hole; 13. a clamping block; 131. an oil filling hole; 14. A middle block; 141. a first side surface; 142. a second side surface; 143. a third side; 144. a fourth side; 145. mounting holes; 15. an inner slide block; 151. a first slider; 152. a second slider; 153. a through hole; 154. an inner groove; 16. a first oil passage; 17. a second oil passage; 18. a first end face; 19. a silica gel plate; 19', a magnet; 2. a guide rail base; 21. an outer slide block; 211. A third slider; 212. a fourth slider; 213. an outer groove; 22. a side plate; 221. a first side plate; 222. a second side plate; 223. a magnetic strip; 224. buckling; 23. a ball screw support end; 24. a fixed end of the ball screw; 25. a steel belt; 3. a ball screw; 31. a screw rod; 32. A ball bearing; 33. a nut; 34. a ball synchro-retainer; 35. a ball chain; 4. a ball track; 5. a ball circulator; 51. a cylinder; 52. an assembly; 521. a rail groove; 6. a drive motor; 61. motor safety cover.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples with reference to the accompanying drawings.

Example 1:

as shown in fig. 1-2, the mobile platform assembly 1 of the present invention includes a sliding seat 12 and a cover plate 11, wherein the cover plate 11 is fixedly installed on the top end of the sliding seat 12. The sliding seat 12 includes a locking block 13, a middle block 14, and an inner sliding block 15, the locking block 13 is used for being locked and fixedly connected with the cover plate 11, the middle block 14 includes a mounting hole 145 for mounting the ball screw 3, and the inner sliding block 15 can realize the sliding movement of the mobile platform assembly 1 on the guide rail base 2. The side surfaces of the middle block 14 include a first side surface 141, a second side surface 142 arranged opposite to the first side surface 141, a third side surface 143, and a fourth side surface 144 arranged opposite to the third side surface 143; the third side 143 extends in a direction away from the engaging block 13 and in a direction away from the middle block 14 to form a first slider 151, the fourth side 144 extends in a direction away from the engaging block 13 and in a direction away from the middle block 14 to form a second slider 152, and the first slider 151 and the second slider 152 are combined to form the inner slider 15; the middle block 14 includes a mounting hole 145 extending from the first side 141 through the second side 142, and the mounting hole 145 is used for being mounted in cooperation with the ball screw 3. The first slider 151 and the second slider 152 are provided with two through holes 153 along the axial direction of the mounting hole 145, and the through holes 153 are used for mounting the ball circulator 5. In addition, the lower half part of the sliding seat 12 is formed by a first side surface 141 retracting towards the direction of the second side surface 142 to form a first end surface 18, the length formed between the first side surface 141 and the second side surface 142 is greater than the length formed between the first end surface 18 and the second side surface 142, and the formation of the first end surface 18 is beneficial to the fixed installation of the ball circulator 5 and enhances the fit degree between the ball circulator 5 and the sliding seat 12.

As shown in fig. 3 to 4, the sliding seat 12 of the present invention is provided with two first oil channels 16 along the axial direction of the mounting hole 145, wherein the first oil channels 16 are symmetrically arranged on both sides of the mounting hole 145, extend from the first side surface 141 to the second side surface 142, and do not penetrate through the second side surface 142; the sliding seat 12 is provided with two second oil passages 17 along the radial direction of the mounting hole 145, the second oil passages 17 are opened on the top surface of the sliding seat 12, extend from the top surface of the sliding seat 12 to the bottom surface of the sliding seat 12 to be communicated with the first oil passage 16, and penetrate through the sliding seat 12; an oil filling hole 131 is formed in any side surface of the clamping block 13, after the cover plate 11 is clamped with the clamping block 13, an opening is formed in the position, located at the oil filling hole 131, of the cover plate 11, lubricating oil can be conveyed into the sliding seat 12 and onto the guide rail base 2 through the oil filling hole 131, the sliding seat 12 can be lubricated without detaching the cover plate 11, the guide rail base 2 can be lubricated without detaching the side plate 22, and operation is convenient; the oil filling hole 131 extends through the other side surface of the clamping block 13 opposite to the clamping block to form a third oil passage 19, and the third oil passage 19 is communicated with the second oil passage 17; the first oil channel 16 is in through connection with the second oil channel 17, and the second oil channel 17 is in through connection with the third oil channel 19, so that after lubricating oil is added from the oil filling hole 131, the lubricating oil can flow into the third oil channel 19, the second oil channel 17 and the first oil channel 16, and the movable sliding platform assembly 1 is lubricated; the second oil duct 17 penetrates through the sliding seat 12, so that lubricating oil can be ensured to flow into the guide rail base 2, lubrication of the linear module is realized, a good lubricating environment is achieved, and the service life of a product can be greatly prolonged.

As shown in fig. 5-6, the closed high-rigidity compact linear module of the present invention includes the above-mentioned moving platform assembly 1, a guide rail base 2 for the moving platform assembly 1 to slide, and a ball screw 3 installed on the moving platform assembly 1, wherein one end of the ball screw 3 is connected to a driving motor 6, the driving motor 6 drives the ball screw 3 to move, and the ball screw 3 can drive the moving platform assembly 1 to move; one end of the ball screw 3 is connected to the ball screw support end 23 and penetrates through the sliding seat 12, and the other end of the ball screw 3 is connected to the ball screw fixing end 24, so that the ball screw 3 is fixedly mounted. One end of the guide rail base 2 close to the mobile platform assembly 1 extends upwards to be provided with a third sliding block 211 matched with the first sliding block 151 to slide and a fourth sliding block 212 matched with the second sliding block 152 to slide, and the third sliding block 211 and the fourth sliding block 212 are combined to form the outer sliding block 21; through the cooperation of the outer slide block 21 and the inner slide block 15, the sliding movement of the mobile platform assembly 1 on the guide rail base 2 can be ensured. The two ends of the sliding seat 12 are provided with ball circulators 5, the ball circulators 5 can realize the connection between the ball 32 and the sliding seat 12, and the circular motion of the ball 32 drives the sliding seat 12 to move linearly on the guide rail base 2.

As shown in fig. 6, one end of the guide rail base 2 close to the second side 142 is provided with a ball screw supporting end 23, one end close to the first side 141 is provided with a ball screw fixing end 24, one end of the screw 31 of the ball screw 3 is movably connected with the ball screw supporting end 23, and the other end of the screw 31 of the ball screw 3 is movably connected with the ball screw fixing end 24 and penetrates through the ball screw fixing end 24; two sides of the guide rail base 2 close to the third side 143 and the fourth side 144 extend upward to form a side plate 22 with an L-shaped cross section, a steel belt 25 is installed at the top end of the guide rail base 2, two ends of the steel belt 25 are respectively fixed on the ball screw fixing end 24 and the ball screw supporting end 23, and a part of the steel belt is located between the cover plate 11 of the moving platform assembly 1 and a gap of the sliding seat 12; the steel belt 12, the guide rail base 2 provided with the side plate 22, the ball screw supporting end 23, and the ball screw fixing end 24 form a closed structure; the closed high-rigidity precise linear module adopts a fully-sealed structure, and the dustproof effect of the module can be effectively improved.

As shown in fig. 7-8, one side of the ball circulator 5 of the present invention extends to form a cylinder 51 fixed in cooperation with the through hole 153, and the same side extends to form a plurality of assemblies 52 with track grooves 521 that are as long as the cylinder 51; the balls 32 are uniformly spaced by the ball-timing retainer 34, and the balls 32 are mounted on the ball-timing retainer 34 to form a ball chain 35. The arrangement of the cylinder 51 in the ball circulator 5 can realize the fixed connection between the ball circulator 5 and the sliding seat 12; the assembly 52 with the track groove 521 in the ball circulator 5 is arranged to fix the ball chain 35, and the ball chain 35 and the sliding seat 12 can be fixedly connected through the ball circulator 5.

As shown in fig. 9-10, the guide rail base 2 and the sliding base 12 of the present invention realize sliding movement through the cooperation of the outer sliding block 21 and the inner sliding block 15; the outer slide block 21 includes a third slide block 211 and a fourth slide block 212 symmetrically disposed along the longitudinal direction of the guide rail base 2, the inner slide block 15 includes a first slide block 151 and a second slide block 152 symmetrically disposed along the axial direction of the mounting hole 145 of the slide base 12, wherein the third slide block 211 is mounted in cooperation with the first slide block 151, and the fourth slide block 212 is mounted in cooperation with the second slide block 152. The third slider 211 and the fourth slider 212 are respectively provided with two rows of outer grooves 213 longitudinally penetrating through the third slider 211 and the fourth slider 212 for rolling the balls 32, and the outer grooves 213 are open, so that the grinding difficulty is effectively reduced, and the length of a grinding workpiece is increased; the first slider 151 and the second slider 152 are each provided with two rows of inner grooves 154 extending longitudinally through the first slider 151 and the second slider 152 for rolling the balls 32, and after the inner slider 15 is engaged with the outer slider 21, the inner grooves 154 and the outer grooves 213 are engaged with each other to form ball tracks for rolling the balls 32. Specifically, the outer groove 213 is disposed on a side of the third slider 211 away from the fourth slider 213, and a side of the fourth slider 213 away from the third slider 211; the inner groove 154 is disposed on a side of the first slider 151 close to the second slider 152, and a side of the second slider 152 close to the first slider 151; the outer groove 213 and the inner groove 154 are two rows, and equal prepressing is applied, so that a lower friction coefficient can be maintained, the rigidity in four directions is increased, self-aligning capability is realized, and installation errors can be reduced, so that high-precision, smooth and stable linear motion is obtained; and the outer groove 213 and the inner groove 154 have a wide width and a low total height, and thus can be used for a single shaft, particularly, vertically and cantilever-mounted, in a place where space saving or moment action is required and high rigidity is required.

As shown in fig. 11 to 12, the ball screw 3 of the present invention includes a screw 31 mounted in a mounting hole 145 of the sliding seat 12, and a plurality of balls 32 mounted on the sliding seat 12; the screw rod 31 is fixedly arranged in the installation hole 145 of the sliding seat 12 through a nut 33; specifically, the balls 32 are formed into the ball chain 35 by the ball cage 34, and the ball chain 35 is fixed to the slide base 12 by the ball circulator 5 and then integrally mounted on the guide rail base 2.

Example 2:

the structure of a closed high-rigidity compact linear module of this embodiment is the same as that of embodiment 1 above, except that:

as shown in fig. 13, the side plates 22 disposed on the rail base 2 are detachably mounted, and the side plates 22 include a second side plate 222 having one end mounted on the rail base 2 and a first side plate 221 detachably mounted on the second side plate 222, so that the linear module of the present invention can be conveniently mounted in a locked manner by simply removing the second side plate 222. The butt joints of the first side plate 221 and the second side plate 222 are both provided with buckles 224, the first side plate 221 and the second side plate 222 are buckled through the buckles 224, and the tightness is good. The magnetic strips 223 are installed at the butt joint of the first side plate 221 and the second side plate 222, and the magnetic strips 223 are mutually adsorbed, so that the first side plate 221 and the second side plate 222 are matched more closely, and the assembly is facilitated.

As shown in fig. 14, a silicone plate 19 and two magnets 19' are sequentially mounted between the cover plate 11 and the sliding seat 12, and correspondingly, two magnet mounting holes 121 are formed in the sliding seat 12; the steel belt 25 is arranged between the silica gel plate 19 and the cover plate 11. The arrangement of the magnet 19' between the sliding seat 12 and the cover plate 11 enhances the adsorption force on the steel strip 25, has strong sealing performance and increases the dustproof effect; the arrangement of the silica gel plate 19 can effectively avoid the sliding friction between the steel belt 25 and the sliding seat 12, and reduce the running resistance and the noise; the magnet mounting hole 121 is disposed to enable the magnet 19' and the sliding seat 12 to be closely attached to each other, thereby preventing noise caused by play.

The working principle of the invention is as follows:

the motor 6 drives the ball screw 3 to move, so that the moving platform assembly 1 is driven to slide on the guide rail base 2, and the operation of the linear module is realized.

The working principle that the ball screw 3 drives the mobile platform assembly 1 is as follows:

the screw rod 31 is installed on the sliding seat 12 through a nut 33, specifically, is installed in the installation hole 145 of the sliding seat 12, and after the motor 6 drives the screw rod 31 to move, the nut 33 installed on the screw rod 31 can perform linear motion along with the rotation of the screw rod 31, and further can drive the sliding seat 12 to perform linear motion, thereby implementing the linear motion of the mobile platform assembly 1.

The working principle of the sliding of the mobile platform assembly 1 on the guide rail base 2 is as follows:

the balls 32 form a ball chain 35 through a ball synchronous retainer 34, the ball chain 35 is fixedly mounted on the sliding seat 12 through the ball circulator 5 and can perform circulating motion, the sliding seat 12 is assembled with the guide rail base 2, and linear motion of the mobile platform assembly 1 on the guide rail base 2 can be realized through the circulating motion of the balls 32.

The above embodiments are specifically described for further illustration of the present invention, and should not be construed as limiting the scope of the present invention, and the non-essential changes made by the person skilled in the art according to the present invention are within the scope of the present invention.

Claims

1. The utility model provides a moving platform subassembly for linear module, its characterized in that: the mobile platform assembly (1) comprises a sliding seat (12) and a cover plate (11) fixedly arranged at the top end of the sliding seat (12), wherein the sliding seat (12) is provided with a first side surface (141) and a second side surface (142) opposite to the first side surface (141), and a mounting hole (145) extending from the first side surface (141) to the second side surface (142) is formed; the sliding seat (12) is provided with at least two first oil channels (16) along the axial direction of the mounting hole (145), the first oil channels (16) are symmetrically arranged on two sides of the mounting hole (145), extend from the first side surface (141) to the second side surface (142), and do not penetrate through the second side surface (142); the sliding seat (12) is provided with at least two second oil channels (17) along the radial direction of the mounting hole (145), the second oil channels (17) are opened on the top surface of the sliding seat (12), extend from the top surface of the sliding seat (12) to the bottom surface of the sliding seat (12) to be communicated with the first oil channel (16), and penetrate through the sliding seat (12).

2. A mobile platform assembly according to claim 1, wherein: the sliding seat (12) comprises a clamping block (13) used for being clamped and fixed with the cover plate (11), a middle block (14) provided with the mounting hole (145), and inner sliding blocks (15) symmetrically arranged on two sides of the middle block (14); the side surface of the middle block (14) is formed by enclosing the first side surface (141), the second side surface (142), a third side surface (143) and a fourth side surface (144) opposite to the third side surface (143); the third side surface (143) extends towards a direction away from the clamping block (13) and a direction away from the middle block (14) to form a first sliding block (151), the fourth side surface (144) extends towards a direction away from the clamping block (13) and a direction away from the middle block (14) to form a second sliding block (152), and the first sliding block (151) and the second sliding block (152) are combined to form the inner sliding block (15); the lower half part of the sliding seat (12) is inwards contracted towards the direction of the second side surface (142) from a first side surface (141) to form a first end surface (18), and the length formed between the first side surface (141) and the second side surface (142) is larger than the length formed between the first end surface (18) and the second side surface (142); the cross section of the clamping block (13) is concave, and the transverse length of the bottom surface of the clamping block (13) exceeds the top surface of the middle block (14).

3. A mobile platform assembly according to claim 2, wherein: at least one oil filling hole (131) is formed in any side face of the clamping block (13), and the oil filling hole (131) extends through the other side face, opposite to the clamping block (13), to form a third oil channel (19); the third oil channel (19) is communicated with the second oil channel (17); the cover plate (11) is located at the oil filling hole (131) after being clamped with the clamping block (13), and the cover plate (11) is provided with an opening.

4. A mobile platform assembly according to claim 2, wherein: the first sliding block (151) and the second sliding block (152) are provided with at least two through holes (153) along the axial direction of the mounting hole (145).

5. The utility model provides a closed high rigidity precision linear module which characterized in that: comprising a moving platform assembly (1) according to any one of the preceding claims 2-4, a guide rail base (2) for sliding the moving platform assembly (1), and a ball screw (3) mounted on the moving platform assembly; the guide rail base (2) extends to form an outer sliding block (21) which is matched with the inner sliding block (15) to slide; one end, close to the moving platform assembly (1), of the guide rail base (2) extends upwards to form a third sliding block (211) which is matched with the first sliding block (151) to slide and a fourth sliding block (212) which is matched with the second sliding block (152) to slide, and the third sliding block (211) and the fourth sliding block (212) are combined to form the outer sliding block (21); the ball screw (3) comprises a screw rod (31) installed in the installation hole (145) of the sliding seat (12) and a plurality of balls (32) installed between the inner sliding block (15) and the outer sliding block (21), and the screw rod (31) is fixedly installed in the installation hole (145) of the sliding seat (12) through a nut (33).

6. The closed high-rigidity precision linear module according to claim 5, wherein: the sliding seat (12) is provided with a ball circulator (5) for circulating rolling of balls (32) at the inner sliding block (15); one side of the ball circulator (5) extends to form a cylinder (51) which is matched and fixed with the through hole (153), and the same side extends to form a plurality of assemblies (52) which are as long as the cylinder (51) and are provided with rail grooves (521); the ball circulators (5) are symmetrically installed at both ends of the first slider (151) and the second slider (152).

7. The closed high-rigidity precision linear module according to claim 5, wherein: the outer sliding block (21) is provided with at least two rows of outer grooves (213) longitudinally penetrating through the outer sliding block (21) for rolling the balls (32), the inner sliding block (15) is provided with at least two rows of inner grooves (154) longitudinally penetrating through the inner sliding block (15) for rolling the balls (32), and after the inner sliding block (15) is clamped on the outer sliding block (21), the inner grooves (154) and the outer grooves (213) are combined to form a ball track for rolling the balls (32); the outer groove (213) is arranged on one side of the third sliding block (211) far away from the fourth sliding block (213) and one side of the fourth sliding block (213) far away from the third sliding block (211); the inner groove (154) is provided on a side of the first slider (151) close to the second slider (152) and on a side of the second slider (152) close to the first slider (151).

8. The closed high-rigidity precision linear module according to claim 5, wherein: the balls (32) are evenly spaced by a ball synchromesh holder (34), and the balls (32) are mounted on the ball synchromesh holder (34) to form a ball chain (35).

9. The closed high-rigidity precision linear module according to claim 5, wherein: one end of the guide rail base (2) close to the second side surface (142) is provided with a ball screw supporting end (23), and one end close to the first side surface (141) is provided with a ball screw fixing end (24); one end of a screw rod (31) of the ball screw is movably connected with the ball screw supporting end (23), and the other end of the screw rod (31) of the ball screw (3) is movably connected with the ball screw fixing end (24) and penetrates through the ball screw fixing end (24); two sides of the guide rail base (2), which are close to the third side face (143) and the fourth side face (144), extend upwards to form a side plate (22) with an L-shaped cross section, a steel belt (25) is installed at the top end of the guide rail base (2), two ends of the steel belt (25) are respectively fixed on the ball screw fixing end (24) and the ball screw supporting end (23), and part of the steel belt is located between a gap between a cover plate (11) of the moving platform assembly (1) and a sliding seat (12); the steel belt (25), the guide rail base (2) provided with the side plate (22), the ball screw supporting end (23) and the ball screw fixing end (24) form a closed structure.

10. The closed high rigidity precision linear module of claim 9, wherein: the side plates (22) comprise a second side plate (222) with one end mounted on the guide rail base (2) and a first side plate (221) detachably mounted on the second side plate (222); the first side plate (221) and the second side plate (222) are fixedly connected in a clamping manner, and a magnetic strip (223) is arranged at the butt joint position of the first side plate (221) and the second side plate (222); a silica gel plate (19) and at least two magnets (19') are sequentially arranged between the cover plate (11) and the sliding seat (12), and correspondingly, at least two magnet mounting holes (121) are formed in the sliding seat (12); the steel belt (25) is arranged between the silica gel plate (19) and the cover plate (11).