阅读说明：本技术 一种全防尘单驱龙门 (Full-dust-proof single-drive gantry ) 是由 戴健飞 柯玉理 李庆光 戴帝水 江雄 于 2021-09-06 设计创作，主要内容包括：本发明属于龙门技术领域,特别涉及到了一种全防尘单驱龙门,该单驱龙门包括有用于承载物体以带动物体运动的横梁轴模组,用于承载横梁轴模组以带动横梁轴模组运动的下轴模组,用于辅助承载横梁轴模组的辅助轴；横梁轴模组设置在下轴模组和辅助轴上,横梁轴模组和/或下轴模组包括有底座、滑动平台和可以进行伸缩的防尘罩,底座上设置有两根导轨,导轨与底座为一体成型,两根导轨侧边均设置有第一滑槽,底座上还固定设置有用于驱动滑动平台进行运动的直线电机,滑动平台通过第一滑槽活动设置在两根导轨上,且滑动平台与直线电机连接；基于导轨与底座为一体成型,保证最上层滑台的移动定位精度,提高了平台下轴模组的刚性和承载能力。(The invention belongs to the technical field of gantries, and particularly relates to a full-dust-proof single-drive gantry which comprises a beam shaft module used for bearing an object to drive the object to move, a lower shaft module used for bearing the beam shaft module to drive the beam shaft module to move, and an auxiliary shaft used for assisting in bearing the beam shaft module; the crossbeam shaft module is arranged on the lower shaft module and the auxiliary shaft, the crossbeam shaft module and/or the lower shaft module comprises a base, a sliding platform and a telescopic dust cover, two guide rails are arranged on the base, the guide rails and the base are integrally formed, first sliding grooves are formed in the side edges of the two guide rails, a linear motor for driving the sliding platform to move is fixedly arranged on the base, the sliding platform is movably arranged on the two guide rails through the first sliding grooves, and the sliding platform is connected with the linear motor; based on guide rail and base be integrated into one piece, guarantee the removal positioning accuracy of the superiors' slip table, improved the rigidity and the bearing capacity of platform lower shaft module.)

1. A full-dust-proof single-drive gantry comprises a beam axle module, a lower axle module and an auxiliary axle, wherein the beam axle module is used for bearing an object to drive the object to move; the transverse beam axle module is arranged on the lower axle module and the auxiliary axle, and is characterized in that the transverse beam axle module and/or the lower axle module comprises a base, a sliding platform and a telescopic dust cover, two guide rails are arranged on the base and are integrally formed with the base, first sliding grooves are formed in the side edges of the two guide rails, a linear motor used for driving the sliding platform to move is fixedly arranged on the base, the sliding platform is movably arranged on the two guide rails through the first sliding grooves, and the sliding platform is connected with the linear motor; the dust cover quantity is two, and a dust cover both ends are connected with sliding platform one end and base one end respectively, and another dust cover both ends are connected with the sliding platform other end and the base other end respectively.

2. A full dust-proof single-drive gantry according to claim 1, wherein the sliding platform is provided with a sliding cavity corresponding to the guide rail, the guide rail is movably arranged in the sliding cavity, the sliding cavity is provided with a second sliding groove corresponding to the first sliding groove, the first sliding groove and the second sliding groove are matched to form a sliding groove channel, and balls are arranged in the sliding groove channel.

3. A full-dust-proof single-drive gantry according to claim 2, wherein first sliding grooves are formed in the left side and the right side of the guide rail, and second sliding grooves are formed in the sliding cavity corresponding to the first sliding grooves in the left side and the right side of the guide rail.

4. The all-dust-proof single-drive gantry crane according to claim 2, wherein the two sliding cavities are respectively located at two ends of the bottom side of the sliding platform, a first fixing groove is further arranged in the middle of the bottom side of the sliding platform, and the upper side of the linear motor is fixedly arranged in the first fixing groove; a second fixing groove is formed between the two guide rails, and the lower side of the linear motor is fixedly arranged in the second fixing groove.

5. A full dust-proof single-drive gantry according to claim 2, wherein a boss is further formed on the base in an extending manner, and the boss is located below the chute channel; an anti-overflow groove is formed in the boss and located below the chute channel.

6. A full dust-proof single-drive gantry according to claim 3, wherein a set of sliding parts is arranged on each of the left and right sides of the sliding platform, each set of sliding parts comprises two sliding parts, the sliding cavity is formed between the sliding platform and the corresponding two sliding parts, the second sliding groove is arranged on the sliding parts, an accommodating channel for accommodating balls is further arranged in each sliding part, and both ends of each accommodating channel are communicated with the sliding groove channels.

7. A full dust-proof single-drive gantry according to claim 6, wherein the sliding part is provided with a drop-off prevention part for preventing balls from dropping off at two ends corresponding to the accommodating channel, and the drop-off prevention part is movably arranged in the first chute; an oil filling hole is further formed in the sliding platform, one end of the oil filling hole penetrates through the sliding platform and is exposed outside, and the other end of the oil filling hole is communicated into the sliding cavity and corresponds to the sliding groove channel.

8. The all-dust-proof single-drive gantry according to claim 1, wherein an auxiliary guide rail transfer block is fixedly arranged on the side of the sliding platform, an auxiliary linear guide rail is arranged on the side of the base, and the auxiliary guide rail transfer block is connected with the auxiliary linear guide rail.

9. A full dust-proof single-drive gantry according to claim 6, wherein the side of the guide rail is fixedly provided with an anti-collision block, the anti-collision block corresponds to the position of the sliding part and is positioned below the sliding part; the number of the anti-collision blocks is more than two, and the anti-collision blocks are uniformly arranged.

10. A full dust-proof single-drive gantry according to claim 1, wherein a photoelectric switch sensing sheet is arranged on the side of the sliding platform, and a photoelectric sensing switch corresponding to the photoelectric switch sensing sheet is arranged on the side of the base; the base side is fixed and is provided with the grating chi, the sliding platform downside is fixed and is provided with the grating encoder, the grating encoder corresponds with the grating chi.

Technical Field

The invention belongs to the technical field of gantries, and particularly relates to a structure of a single-drive gantry.

Background

The existing linear motor single-drive gantry platform adopts a standard rolling linear guide rail as a guide mechanism, the linear guide rail is connected with a module base through a screw, and a guide rail sliding block is connected with a sliding plate, so that the linear motion positioning of each shaft is realized. However, with the continuous update of the equipment, the equipment has higher requirements on the speed and the precision of the single-drive gantry and has smaller and smaller requirements on the size of the platform.

If the requirements of high speed, high acceleration and small size are to be met, the existing linear motor single-drive gantry platform guided by the standard linear guide rail has the following problems to be improved:

1. the mechanism parts of the platform are too many, the guide rail, the sliding block, the base of each shaft and the sliding table plate are connected through screws, the installation steps are complicated, and the assembly time is long.

2. The linear guide rail of the platform needs to be installed in the base of the linear motion system through fasteners such as screws, the rigidity of the whole mechanism is reduced, and the linear guide rail is difficult to be suitable for high-rigidity application requirements. Especially, in the case where the lower shaft of the stage is used at high acceleration and high frequency, the joints of the screw in the moving part are more connected, and the possibility of resonance is higher.

3. The guide precision of the linear guide rail of the platform after being assembled is influenced by the precision of the base and the mounting surface, precision errors can be generally superposed, precision errors of parts of two shafts are superposed together, the moving and positioning precision of the sliding table on the uppermost layer is difficult to guarantee, and great height fluctuation is easy to generate.

4. The linear guide's that the platform used structural style is fixed, makes up into the module, and structural cooperation is not compact enough, and space utilization is not high, and the platform size is difficult to compress, and the platform focus is high, and operating stability is relatively poor.

If the overall performance of the linear motor single-drive gantry platform needs to be improved, a better guide device needs to be adopted, and the linear motor single-drive gantry platform is highly integrated with a platform base, so that the use of an intermediate connection fastener is reduced, the size of the platform is compressed, the gravity center of the platform is reduced, and the rigidity of the platform is improved.

Disclosure of Invention

In order to solve the above problems, a primary object of the present invention is to provide a fully dustproof single-drive gantry, which integrates a base and a guide rail together, so that the installation steps are simple and the assembly time is short; and the moving and positioning precision of the sliding table on the uppermost layer is convenient to ensure.

The invention further aims to provide the full-dust-proof single-drive gantry which is higher in overall rigidity and suitable for high-rigidity application requirements.

In order to achieve the above object, the present invention has the following technical means.

A full-dust-proof single-drive gantry comprises a beam axle module, a lower axle module and an auxiliary axle, wherein the beam axle module is used for bearing an object to drive the object to move; the transverse beam axle module is arranged on the lower axle module and the auxiliary axle, and is characterized in that the transverse beam axle module and/or the lower axle module comprises a base, a sliding platform and a telescopic dust cover, two guide rails are arranged on the base and are integrally formed with the base, first sliding grooves are formed in the side edges of the two guide rails, a linear motor used for driving the sliding platform to move is fixedly arranged on the base, the sliding platform is movably arranged on the two guide rails through the first sliding grooves, and the sliding platform is connected with the linear motor; the dust cover quantity is two, and a dust cover both ends are connected with sliding platform one end and base one end respectively, and another dust cover both ends are connected with the sliding platform other end and the base other end respectively. The working principle of the linear motor is the prior art. The dust cover is arranged, and the dust prevention effect is achieved. In the single-drive gantry, either one of the beam shaft module and the lower shaft module comprises a base, a sliding platform and a telescopic dust cover, or both the beam shaft module and the lower shaft module comprise the base, the sliding platform and the telescopic dust cover.

Traditional guide rail need guarantee self precision through the meticulous grinding processing before dispatching from the factory, but can't avoid dispatching from the factory the deformation of back transportation turnover in-process, and when fastening through the screw and pedestal connection, the straightness accuracy still need be measured through instruments such as amesdial, square, do the fine adjustment to satisfy higher straightness accuracy, nevertheless receive base and installation face precision influence at the installation, the precision error can superpose usually, final product precision can certainly be greater than the precision that guide rail self can guarantee. In the single-drive gantry, the guide rail and the base are integrally formed, so that a precision machining link of the guide rail can be directly ground after being formed with the base, the final straightness is directly guaranteed, deformation and error accumulation of an intermediate link are avoided, the achieved precision is higher, the moving and positioning precision of the sliding table on the uppermost layer is guaranteed, and the rigidity and the bearing capacity of a lower shaft module of the platform are improved. And the base and the guide rail are integrated together, so that the original processing link of the guide rail mounting surface is omitted, the adjusting link of the guide rail mounting precision is omitted, the mounting step is simple, the assembly time is short, and the labor cost is saved.

Furthermore, the sliding platform is provided with a sliding cavity corresponding to the guide rail, the guide rail is movably arranged in the sliding cavity, the sliding cavity is provided with a second sliding groove corresponding to the first sliding groove, the first sliding groove and the second sliding groove are matched to form a sliding groove channel, and the sliding groove channel is internally provided with balls.

Furthermore, the left side and the right side of the guide rail are provided with first sliding chutes, and the sliding cavities are provided with second sliding chutes corresponding to the first sliding chutes on the left side and the right side of the guide rail. The arrangement of the four sliding groove channels and the arrangement of the balls enable the sliding platform and the base to move smoothly through the rolling of the balls in the sliding groove channels when the sliding platform and the base move relatively. And above-mentioned this setting, more reasonable application the space. The four sliding groove channels and the balls are arranged, so that four embedded sliding structures are formed between the base and the sliding platform, namely, the guide rail is an embedded guide rail with an embedded sliding structure.

Furthermore, the two sliding cavities are respectively positioned at two ends of the bottom side of the sliding platform, a first fixing groove is also arranged in the middle of the bottom side of the sliding platform, and the upper side of the linear motor is fixedly arranged in the first fixing groove; a second fixing groove is formed between the two guide rails, and the lower side of the linear motor is fixedly arranged in the second fixing groove. The base is U-shaped as a whole. The positions of the first fixing groove and the second fixing groove and the arrangement of the linear motor enable the space of the base to be fully utilized, the height of the single-drive gantry is reduced, the gravity center is reduced accordingly, and the overall weight of the single-drive gantry is reduced. The linear motor may include a stator fixed in the second fixing groove and a mover fixed in the first fixing groove.

Furthermore, a boss is formed on the base in an extending manner and is positioned below the chute channel; an anti-overflow groove is formed in the boss and located below the chute channel. The boss and the anti-overflow groove can receive grease overflowing from the chute channel, so as to prevent oil leakage and pollution.

Further, the sliding platform left and right sides all is provided with a set of slider, and a set of slider is including two sliders, the slip cavity is formed between sliding platform and two sliders that correspond, the second spout sets up on the slider, just still be provided with the passageway that holds that is used for holding the ball in the slider, hold the passageway both ends and all put through with the spout passageway.

Furthermore, the sliding part is provided with anti-falling parts for preventing the balls from falling off at two ends corresponding to the accommodating channel, and the anti-falling parts are movably arranged in the first sliding groove; an oil filling hole is further formed in the sliding platform, one end of the oil filling hole penetrates through the sliding platform and is exposed outside, and the other end of the oil filling hole is communicated into the sliding cavity and corresponds to the sliding groove channel. The setting of oil filler point can be directly with inside lubricating grease passes through the oil filler point and pours into the slip cavity into, need not dismouting sliding platform.

Furthermore, the fixed supplementary guide rail switching piece that is provided with of sliding platform side, the base side is provided with supplementary linear guide, supplementary guide rail switching piece is connected with supplementary linear guide. Four sliding grooves of the lower shaft module or/and the beam shaft module are communicated with eight sliding parts to support and one side surface auxiliary linear guide rail is arranged, so that the rigidity and the bearing capacity of the lower shaft module or/and the beam shaft module are further improved.

Furthermore, an anti-collision block is fixedly arranged on the side edge of the guide rail, corresponds to the sliding part in position and is positioned below the sliding part; the number of the anti-collision blocks is more than two, and the anti-collision blocks are uniformly arranged. The anti-collision block is used for preventing the sliding part from colliding on the base.

Furthermore, a photoelectric switch induction sheet is arranged on the side edge of the sliding platform, and a photoelectric induction switch corresponding to the photoelectric switch induction sheet is arranged on the side edge of the base; the base side is fixed and is provided with the grating chi, the sliding platform downside is fixed and is provided with the grating encoder, the grating encoder corresponds with the grating chi. The working principle of the photoelectric switch induction sheet and the photoelectric induction switch is the prior art. The working principle of the grating ruler and the grating encoder is the prior art.

The invention has the beneficial effects that: compared with the prior art, the precision machining link of the guide rail can be directly ground after being formed with the base based on the fact that the guide rail and the base are integrally formed, the final straightness is directly guaranteed, deformation and error accumulation of the middle link are avoided, the achieved precision is higher, the moving and positioning precision of the sliding table on the uppermost layer is guaranteed, and the rigidity and the bearing capacity of the platform lower shaft module are improved. And the base and the guide rail are integrated together, so that the original processing link of the guide rail mounting surface is omitted, the adjusting link of the guide rail mounting precision is omitted, the mounting step is simple, the assembly time is short, and the labor cost is saved.

Drawings

FIG. 1 is a schematic diagram of the present invention.

Fig. 2 is an exploded view of a beam axis module from a first perspective.

FIG. 3 is an exploded view of the beam axle module from a second perspective.

FIG. 4 is a cross-beam axle module cross-sectional view.

Fig. 5 is a partially enlarged view of a portion a of fig. 4.

Fig. 6 is a structural schematic diagram of the beam sliding platform and a part of the beam linear motor.

Fig. 7 is a schematic view of a set of beam slides.

Fig. 8 is an exploded view of the auxiliary shaft.

Fig. 9 is an exploded view of the lower shaft module from a first perspective.

Fig. 10 is an exploded view of the lower shaft module from a second perspective.

FIG. 11 is a cross-sectional view of the lower shaft module.

Fig. 12 is a partially enlarged view of fig. 11 at B.

Fig. 13 is a structural schematic diagram of the lower shaft sliding platform and a part of the lower shaft linear motor.

Fig. 14 is a schematic view of a set of lower shaft slides.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, the single-drive gantry comprises a beam axle module 1 for carrying an object to drive the object to move, a lower axle module 2 for carrying the beam axle module 1 to drive the beam axle module 1 to move, and an auxiliary axle 3 for assisting in carrying the beam axle module 1; the transverse beam shaft module 1 is arranged on the lower shaft module 2 and the auxiliary shaft 3, and is characterized in that the transverse beam shaft module 1 and the lower shaft module 2 respectively comprise a base, a sliding platform and a telescopic dust cover, and specifically, the transverse beam shaft module 1 comprises a transverse beam base 11, a transverse beam sliding platform 12 and a telescopic transverse beam dust cover 13; the lower shaft module 2 comprises a lower die base 21, a lower die sliding platform 22 and a lower die dust cover 23 which can be extended and retracted; the cross beam dust cover 13 and the lower die dust cover 23 are preferably both accordion covers.

Referring to fig. 8, the auxiliary shaft 3 includes an auxiliary shaft base 31, an auxiliary shaft linear guide rail 32, auxiliary shaft dust covers 33, and auxiliary shaft rotary connection plates 34, the auxiliary shaft linear guide rail 32 is disposed on the auxiliary shaft base 31, the auxiliary shaft rotary connection plates 34 are fixed on the auxiliary shaft linear guide rail 32, the number of the auxiliary shaft dust covers 33 is two, two ends of one auxiliary shaft dust cover 33 are respectively connected with one end of the auxiliary shaft rotary connection plate 34 and one end of the auxiliary shaft base 31, and two ends of the other auxiliary shaft dust cover 33 are respectively connected with the other end of the auxiliary shaft rotary connection plate 34 and the other end of the auxiliary shaft base 31; the beam axle module 1 is disposed on the auxiliary axle coupling plate 34 and the lower die slide table 22.

Referring to fig. 2 to 7, two beam guide rails 14 are arranged on the beam base 11, the beam guide rails 14 and the beam base 11 are integrally formed, beam first sliding grooves 141 are arranged on the side edges of the two beam guide rails 14, a beam linear motor 15 for driving the beam sliding platform 12 to move is further fixedly arranged on the beam base 11, the beam sliding platform 12 is movably arranged on the two beam guide rails 14 through the beam first sliding grooves 141, and the beam sliding platform 12 is connected with the beam linear motor 15; the number of the beam dust covers 13 is two, two beam dust covers 13 are arranged on the beam base 11, two ends of one beam dust cover 13 are fixedly connected with one end of the beam sliding platform 12 and one end of the beam base 11 respectively, and two ends of the other beam dust cover 13 are fixedly connected with the other end of the beam sliding platform 12 and the other end of the beam base 11 respectively.

Further, the beam sliding platform 12 is provided with a beam sliding cavity 121 corresponding to the beam guide rail 14, the beam guide rail 14 is movably disposed in the beam sliding cavity 121, a beam second sliding groove 122 is disposed at a position of the beam sliding cavity 121 corresponding to the beam first sliding groove 141, a beam sliding groove channel is formed by the beam first sliding groove 141 and the beam second sliding groove 122 in a matching manner, and a beam ball 142 is disposed in the beam sliding groove channel.

Further, the left and right sides of the beam guide rail 14 are provided with beam first sliding grooves 141, and the beam sliding cavities 121 corresponding to the beam first sliding grooves 141 on the left and right sides of the beam guide rail 14 are provided with beam second sliding grooves 122.

Further, the two beam sliding cavities 121 are respectively located at two ends of the bottom side of the beam sliding platform 12, a first beam fixing groove 123 is further arranged in the middle of the bottom side of the beam sliding platform 12, and the upper side of the beam linear motor 15 is fixedly arranged in the first beam fixing groove 123. The beam linear motor 15 drives the beam sliding platform 12 to move, and further drives the workpiece on the beam sliding platform 12 to move. And a beam second fixing groove is formed between the two beam guide rails, and the lower side of the beam linear motor is fixedly arranged in the beam second fixing groove. The second fixed groove of the cross beam corresponds to the first fixed groove of the cross beam.

Furthermore, a cross beam boss 111 is formed on the cross beam base 11 in an extending manner, and the cross beam boss 111 is positioned below the cross beam chute channel; a cross beam anti-overflow groove 112 is formed in the cross beam boss 111, and the cross beam anti-overflow groove 112 is located below the cross beam chute channel.

Further, a set of beam sliding parts 124 is arranged on each of the left side and the right side of the beam sliding platform 12, each set of beam sliding parts 124 comprises two beam sliding parts 124, a beam sliding cavity 121 is formed between the beam sliding platform 12 and the two corresponding beam sliding parts 124, the beam second sliding groove 122 is formed in each beam sliding part 124, a beam accommodating channel 125 used for accommodating a beam ball 142 is further arranged in each beam sliding part 124, and two ends of each beam accommodating channel 125 are communicated with the corresponding beam sliding groove channels. Preferably, two sets of beam sliding parts 124 are disposed on both left and right sides of the beam sliding platform 12, that is, two sets of beam sliding parts 124 are connected to each beam guide rail 14.

Further, a cross beam anti-falling part 126 for preventing the cross beam ball 142 from falling off is fixedly arranged at each end of the cross beam sliding part 124 corresponding to the cross beam accommodating channel 125, and the cross beam anti-falling part 126 is movably arranged in the cross beam first sliding groove 141; the beam sliding platform 12 is further provided with a beam oil filling hole 127, one end of the beam oil filling hole 127 penetrates through the beam sliding platform 12 and is exposed outside, and the other end of the beam oil filling hole 127 penetrates into the beam sliding cavity 121 and corresponds to the beam sliding groove channel.

Further, a beam anti-collision block 143 is fixedly arranged on a side of the beam guide rail 14, and the beam anti-collision block 143 corresponds to the beam sliding part 124 and is located below the beam sliding part 124; the number of the beam anti-collision blocks 143 is more than two, and the beam anti-collision blocks are uniformly arranged.

Further, a beam photoelectric switch induction sheet 16 is arranged on the side of the beam sliding platform 12, and a beam photoelectric induction switch 161 corresponding to the beam photoelectric switch induction sheet 16 is arranged on the side of the beam base 11; crossbeam base side is fixed and is provided with crossbeam grating chi 17, crossbeam sliding platform 12 downside is fixed and is provided with crossbeam grating encoder 171, crossbeam grating encoder 171 corresponds with crossbeam grating chi 17.

The structure in the beam axle module with the beam prefix is substantially the same as the corresponding structure without the beam prefix in the invention. In the embodiment, the purpose is to distinguish from each structure of the lower shaft module.

Referring to fig. 8 to 14, two lower shaft guide rails 24 are arranged on the lower shaft base 21, the lower shaft guide rails 24 and the lower shaft base 21 are integrally formed, a lower shaft first sliding groove 241 is arranged on each of the side edges of the two lower shaft guide rails 24, a lower shaft linear motor 25 for driving the lower shaft sliding platform 22 to move is further fixedly arranged on the lower shaft base 21, the lower shaft sliding platform 22 is movably arranged on the two lower shaft guide rails 24 through the lower shaft first sliding groove 241, and the lower shaft sliding platform 22 is connected with the lower shaft linear motor 25; the number of the lower shaft dust covers 23 is two, the two lower shaft dust covers 23 are arranged on the lower shaft base 21, two ends of one lower shaft dust cover 23 are fixedly connected with one end of the lower shaft sliding platform 22 and one end of the lower shaft base 21 respectively, and two ends of the other lower shaft dust cover 23 are fixedly connected with the other end of the lower shaft sliding platform 22 and the other end of the lower shaft base 21 respectively.

Further, the lower shaft sliding platform 22 is provided with a lower shaft sliding cavity 221 corresponding to the lower shaft guide rail 24, the lower shaft guide rail 24 is movably disposed in the lower shaft sliding cavity 221, a lower shaft second sliding groove 222 is disposed at a position of the lower shaft sliding cavity 221 corresponding to the lower shaft first sliding groove 241, a lower shaft sliding groove channel is formed by the lower shaft first sliding groove 241 and the lower shaft second sliding groove 222 in a matched manner, and a lower shaft ball 242 is disposed in the lower shaft sliding groove channel.

Further, the left and right sides of the lower shaft guide rail 24 are both provided with a lower shaft first sliding groove 241, and the lower shaft sliding cavity 221 is provided with a lower shaft second sliding groove 222 corresponding to the lower shaft first sliding groove 241 on the left and right sides of the lower shaft guide rail 24.

Further, the two lower shaft sliding cavities 221 are respectively located at two ends of the bottom side of the lower shaft sliding platform 22, a lower shaft first fixing groove 223 is further disposed in the middle of the bottom side of the lower shaft sliding platform 22, and the upper side of the lower shaft linear motor 25 is fixedly disposed in the lower shaft first fixing groove 223. The lower shaft linear motor 25 drives the lower shaft sliding platform 22 to move, and further drives the beam shaft module on the lower shaft sliding platform 22 to move. A lower shaft second fixing groove is formed between the two lower shaft guide rails, and the lower side of the lower shaft linear motor is fixedly arranged in the lower shaft second fixing groove. The second fixing groove of the lower shaft corresponds to the first fixing groove of the lower shaft.

Furthermore, a lower shaft boss 211 is further formed on the lower shaft base 21 in an extending manner, and the lower shaft boss 211 is located below the lower shaft sliding groove channel; a lower shaft anti-overflow groove 212 is formed in the lower shaft boss 211, and the lower shaft anti-overflow groove 212 is located below the lower shaft chute channel.

Further, a set of lower shaft sliding parts 224 is arranged on each of the left side and the right side of the lower shaft sliding platform 22, each set of lower shaft sliding parts 224 includes two lower shaft sliding parts 224, the lower shaft sliding cavity 221 is formed between the lower shaft sliding platform 22 and the two corresponding lower shaft sliding parts 224, the lower shaft second sliding groove 222 is arranged on the lower shaft sliding parts 224, a lower shaft accommodating channel 225 for accommodating the lower shaft ball 242 is further arranged in each lower shaft sliding part 224, and both ends of each lower shaft accommodating channel 225 are communicated with the lower shaft sliding groove channels. Preferably, two sets of lower shaft sliding parts 224 are disposed on both left and right sides of the lower shaft sliding platform 22, that is, two sets of lower shaft sliding parts 224 are connected to each lower shaft guide rail 24.

Further, a lower shaft anti-falling part 226 for preventing the lower shaft ball 242 from falling off is fixedly arranged at both ends of the lower shaft sliding part 224 corresponding to the lower shaft accommodating channel 225, and the lower shaft anti-falling part 226 is movably arranged in the lower shaft first sliding groove 241; a lower shaft oil injection hole 227 is further formed in the lower shaft sliding platform 22, one end of the lower shaft oil injection hole 227 penetrates through the lower shaft sliding platform 22 and is exposed outside, and the other end of the lower shaft oil injection hole 227 penetrates through the lower shaft sliding cavity 221 and corresponds to the lower shaft sliding groove channel.

Further, a lower shaft auxiliary guide rail transfer block 28 is fixedly arranged on the side of the lower shaft sliding platform 22, a lower shaft auxiliary linear guide rail 29 is fixedly arranged on the side of the lower shaft base 21, and the lower shaft auxiliary guide rail transfer block 28 is connected with the lower shaft auxiliary linear guide rail 28. An auxiliary linear guide rail and an auxiliary guide rail switching block can also be arranged on the beam shaft module 1.

Further, a lower shaft anti-collision block 243 is fixedly arranged at the side of the lower shaft guide rail 24, and the lower shaft anti-collision block 243 corresponds to the lower shaft sliding piece 224 and is located below the lower shaft sliding piece 224; the number of the lower shaft anti-collision blocks 243 is more than two, and the lower shaft anti-collision blocks are uniformly arranged.

Further, a lower shaft photoelectric switch sensing piece 26 is arranged on the side of the lower shaft sliding platform 22, and a lower shaft photoelectric switch 261 corresponding to the lower shaft photoelectric switch sensing piece 26 is arranged on the side of the lower shaft base 21; the side edge of the lower shaft base is fixedly provided with a lower shaft grating ruler 27, the lower side of the lower shaft sliding platform 22 is fixedly provided with a lower shaft grating encoder 271, and the lower shaft grating encoder 271 corresponds to the lower shaft grating ruler 27.

The structure in the lower shaft module with the lower shaft prefix is the same as the corresponding structure without the lower shaft prefix in the invention content, and the structure is substantially the same; in the embodiment, the purpose is to distinguish from each structure of the beam axle module.

The invention has the beneficial effects that: compared with the prior art, the precision machining link of the guide rail can be directly ground after being formed with the base based on the fact that the guide rail and the base are integrally formed, the final straightness is directly guaranteed, deformation and error accumulation of the middle link are avoided, the achieved precision is higher, the moving and positioning precision of the sliding table on the uppermost layer is guaranteed, and the rigidity and the bearing capacity of the platform lower shaft module are improved. And the base and the guide rail are integrated together, so that the original processing link of the guide rail mounting surface is omitted, the adjusting link of the guide rail mounting precision is omitted, the mounting step is simple, the assembly time is short, and the labor cost is saved.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.