CN111069925A

CN111069925A - Angle revolving platform

Info

Publication number: CN111069925A
Application number: CN202010025335.4A
Authority: CN
Inventors: 鄢德文
Original assignee: Beijing Jike Instrument Co ltd
Current assignee: Beijing Jike Instrument Co ltd
Priority date: 2020-01-10
Filing date: 2020-01-10
Publication date: 2020-04-28

Abstract

The invention belongs to the technical field of rotary tables, and particularly relates to an angle rotary table. The ball screw is arranged in the middle of the base of the angle rotary table, circular motion input through the ball screw is converted into linear motion of the sliding block, the sliding rails are arranged on two sides of the ball screw, the rotary table frame is arranged on the sliding rails, and the integrated transmission mechanism is arranged on the sliding block, so that the linear motion can be carried out along with the sliding block, and meanwhile, the displacement change of the rotary table in the vertical direction during pitching rotation along the sliding rails can be met.

Description

Angle revolving platform

Technical Field

The invention belongs to the technical field of rotary tables, and particularly relates to an angle rotary table.

Background

The rotary worktable is a machine tool accessory which is provided with a rotatable table top and is used for clamping workpieces and realizing rotation and indexing positioning, and is called a rotary table or a fourth shaft for short. The rotary table can be divided into a general rotary table and a precise rotary table according to different use scenes.

In the current conventional technical scheme, the rotary table usually rotates in a circular translation manner, but needs the worktable to rotate in a pitching manner when the fine research of subjects such as optics and dynamics is carried out, the current pitching rotating angle rotary table usually needs to be provided with a set of transmission mechanism for converting rotary motion into reciprocating translational motion and a set of transmission mechanism for adapting to the lifting action of the worktable in the rotating process, the structure is complex, the accumulated error of the system is increased, and the accuracy of the angle rotary table is low and the stability is poor.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides the angle rotary table with the integrated transmission mechanism, which has the advantages of simple and exquisite structure, small system error and high transmission precision.

In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: an angle rotary table comprises a base, wherein a ball screw is arranged in the middle of the base and comprises a screw rod rotationally connected with the base and a sliding block capable of axially moving along the screw rod; arc-shaped slide rails are respectively arranged on two sides of the ball screw, each slide rail comprises an inner slide rail and an outer slide rail which are connected in a sliding manner, the inner slide rail is fixedly connected with the base, rotary tables are erected on the outer slide rails on two sides of the inner slide rail, and the rotary tables are fixedly connected with the outer slide rails; the sliding block is provided with a transmission mechanism, and a transmission shaft is arranged between the transmission mechanism and the rotary table. The input circumferential rotation of the screw rod is converted into the linear motion of the sliding block, the transmission mechanism drives the rotary table to do linear motion along with the linear motion of the sliding block, the rotary table rotates in a pitching mode under the guiding effect of the sliding rail, the transmission mechanism is simply and ingeniously integrated, the system error is reduced, and the transmission precision is improved.

Furthermore, the transmission mechanism comprises a clamping block fixedly connected with the top end of the sliding block, the clamping block comprises a connecting plate parallel to the lead screw, a first clamping plate and a second clamping plate are arranged on one side, corresponding to the transmission shaft, of the connecting plate, the first clamping plate and the second clamping plate form a C-shaped clamping cavity, a first bearing and a second bearing are concentrically arranged in the clamping cavity, the inner ring of the first bearing and the inner ring of the second bearing are fixedly connected with the transmission shaft, and the outer ring of the first bearing and the outer ring of the second bearing are in unilateral contact with the first clamping plate and the second clamping plate respectively. First bearing, second bearing are responsible for the transmission of a direction respectively, and original mutual conflict's bearing and grip block no longer act after the antiport, trade another and continue the transmission to bearing and grip block, have effectively eliminated the backlash error to first bearing, second bearing unilateral contact just can carry out the motion of vertical direction simultaneously in the centre gripping chamber, thereby utilize the transmission of same set of mechanical structure realization horizontal direction and vertical direction simultaneously ingeniously.

Further, one side that the connecting plate corresponds the transmission shaft is equipped with the regulating plate, the regulating plate is parallel with the second grip block, be equipped with a plurality of screw holes on the regulating plate face, wear to establish the adjusting screw that can be used to adjust first grip block and second grip block distance in the screw hole. Through precession or back-out adjusting screw, first grip block and the corresponding diminishing or grow of second grip block distance can compensate the ball, the influence that the deformation etc. of grip block brought, further improves transmission precision to can also carry out the first grip block of adaptation and second grip block distance according to the ball screw thread clearance of difference, extend drive mechanism's universality.

Furthermore, a plurality of first balls are arranged between the opposite side surfaces of the inner slide rail and the outer slide rail, a first retaining frame is arranged outside each first ball, and first rolling grooves are formed in the positions, corresponding to the first balls, of the inner slide rail and the outer slide rail. The freedom degrees of the inner slide rail and the outer slide rail in the non-slide rail setting direction are limited through the action of the first rolling groove and the first rolling balls, and meanwhile, the stability and the accuracy of the outer slide rail and the rotary table in the movement process are improved.

Furthermore, a plurality of second balls are arranged between the inner slide rail and the opposite side surfaces of the slide block, a second retainer is arranged outside each second ball, and second rolling grooves are formed in the positions, corresponding to the second balls, of the inner slide rail and the outer slide rail. The circumferential movement of the sliding block is limited through the action of the second rolling groove and the second rolling balls, and meanwhile, the stability and the accuracy of the sliding block in movement are improved.

Further, the side surface of the base, which is parallel to the screw rod, is provided with a light control module, the light control module comprises a zero optical gate fixedly connected with the base, the zero optical gate corresponds to the middle of the inner slide rail, the side surface of the rotary table is provided with a zero optical grating corresponding to the position of the zero optical gate, and the zero optical grating corresponds to the middle of the outer slide rail. And the zero-position diaphragm automatically stops when moving to the zero-position optical gate, so that the return-to-zero verification of the rotary table is realized.

Furthermore, the light control module comprises two limiting diaphragms fixedly connected with the rotary table and two limiting optical shutters fixedly connected with the base, the two limiting diaphragms and the two limiting optical shutters are respectively located at the limiting positions on the two sides of the rotary table in the rotary motion, and the limiting diaphragms are located between the limiting optical shutters on the two sides. Two sets of spacing diaphragms, spacing optical gate are separated in both sides extreme position department, constitute respectively that the burden is spacing and positive spacing, avoid the revolving platform to rotate excessively and cause the spare part of internal motion to damage, have also guaranteed the transmission precision simultaneously.

Furthermore, an operation hole is formed in the middle of the rotary table and corresponds to the position of the lead screw, and the operation hole is matched with the cover plate. The slide block and the transmission mechanism can be conveniently overhauled and adjusted through the operation hole, and the cover plate protects the internal structure.

Furthermore, the one end that the base was worn out to the lead screw is equipped with the third bearing, the third bearing outer lane passes through mounting bracket and base rigid coupling, the one end that the lead screw stretches out the third bearing is equipped with drive lead screw pivoted actuating mechanism. Set up the third bearing and make the relative rotation of lead screw and base more stable, actuating mechanism drives the lead screw as the former motive device drive lead screw of angle revolving platform and rotates to realize the every single move rotation of revolving platform.

Furthermore, a supporting mechanism which is convenient for the lead screw to stably rotate is arranged between one end of the lead screw, which is far away from the third bearing, and the base. One end of the lead screw penetrates out of the base so as to be connected with the driving mechanism, the other end of the lead screw is also rotatably connected with the base, and the supporting mechanism is arranged, so that the lead screw overhanging end is prevented from moving along with the sliding block in the vertical direction, the movement precision is improved, and meanwhile, the lead screw is prevented from being damaged.

The invention has the following beneficial effects:

the ball screw is arranged in the middle of the base of the angle rotary table, circular motion input through the ball screw is converted into linear motion of the sliding block, the sliding rails are arranged on two sides of the ball screw, the rotary table frame is arranged on the sliding rails, and the integrated transmission mechanism is arranged on the sliding block, so that the linear motion can be carried out along with the sliding block, and meanwhile, the displacement change of the rotary table in the vertical direction during pitching rotation along the sliding rails can be met.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a left side cutaway view of FIG. 1 of the present invention;

FIG. 3 is a front cut-away view of FIG. 1 in accordance with the present invention;

FIG. 4 is a schematic structural diagram of the main body of the present invention with a portion of the driving mechanism and the light control module omitted;

FIG. 5 is a schematic diagram showing the positional relationship between the transmission mechanism and the slide rail, ball screw, and base according to the present invention;

FIG. 6 is a schematic structural view of the transmission mechanism of the present invention;

fig. 7 is a top view of fig. 6 in accordance with the present invention.

Detailed Description

Referring to fig. 1 to 7, the present embodiment shows an angle turret, which includes a base 1, a ball screw 2 is disposed in the middle of the base 1, and the ball screw 2 includes a screw 21 rotatably connected to the base 1 and a slider 22 capable of moving axially along the screw 21; arc-shaped slide rails 3 are respectively arranged on two sides of the ball screw 2, each slide rail 3 comprises an inner slide rail 31 and an outer slide rail 32 which are connected in a sliding manner, the inner slide rail 31 is fixedly connected with the base 1, the outer slide rails 32 on the two sides are provided with rotary tables 6 in an erected manner, and the rotary tables 6 are fixedly connected with the outer slide rails 32; the slide block 22 is provided with a transmission mechanism 4, and a transmission shaft 5 is arranged between the transmission mechanism 4 and the rotary table 6. It can be understood that the input circular rotation is converted into the linear motion of the slide block 22 by the lead screw 21, the transmission mechanism 4 drives the rotary table 6 to do linear motion along with the linear motion of the slide block 22, the rotary table 6 realizes pitching rotation under the guiding action of the slide rail 3, the simple and exquisite integrated design of the transmission mechanism 4 reduces the system error and improves the transmission precision, and the ball screw 2, the transmission mechanism 4 and the driving mechanism of the lead screw 21 are all positioned in the middle of the base 1, the whole structure is compact, the symmetry is good, the stress is balanced, the load limit of the device can be improved, the operation stability and the impact resistance can be improved, and the service life of the device can be effectively prolonged.

As shown in fig. 6 to 7, further, the transmission mechanism 4 includes a clamping block 41 fixedly connected to the top end of the slider 22, the clamping block 41 includes a connecting plate 411 parallel to the lead screw 2, a first clamping plate 412 and a second clamping plate 413 are disposed on one side of the connecting plate 411 corresponding to the transmission shaft 5, the connecting plate 411, the first clamping plate 412 and the second clamping plate 413 form a C-shaped clamping cavity, the first bearing 42 and the second bearing 43 are concentrically disposed in the clamping cavity, an inner ring of the first bearing 42 and an inner ring of the second bearing 43 are both fixedly connected to the transmission shaft 5, and an outer ring of the first bearing 42 and an outer ring of the second bearing 43 are respectively in unilateral contact with the first clamping plate 412 and the second clamping plate 413. Furthermore, an adjusting plate 414 is disposed on one side of the connecting plate 411 corresponding to the transmission shaft 5, the adjusting plate 414 is parallel to the second clamping plate 413, a plurality of threaded holes are disposed on a surface of the adjusting plate 414, and adjusting screws for adjusting a distance between the first clamping plate 412 and the second clamping plate 413 penetrate through the threaded holes.

It can be understood that first bearing 42, second bearing 43 are responsible for the transmission of a direction respectively, and original mutual conflict bearing and grip block no longer act on after the antiport, trade another pair of bearing and grip block and continue the transmission, have effectively eliminated the backlash error to first bearing 42, the unilateral contact of second bearing 43 just can carry out vertical direction's motion simultaneously in the centre gripping chamber, thereby utilize same set of mechanical structure simultaneously to realize horizontal direction and vertical direction's transmission ingeniously. For example, when the sliding block 22 moves upward from the middle, the second bearing 43 abuts against the second clamping plate 413, the rotating table 6 is pushed to move upward along the sliding rail 3 through the transmission shaft 5, and the vertical heights of the contact points where the second bearing 43 collides with each other on the second clamping plate 413 are raised; when the slide 22 moves downward from the upper end in the opposite direction, the first bearing 42 abuts against the first clamping plate 412, the rotary table 6 is pushed to move downward along the slide rail 3 through the transmission shaft 5, and the contact point where the first bearing 42 abuts against the first clamping plate 412 is lowered, during which the second bearing 43 and the second clamping plate 413 are slightly loosened. Through precession or back-out adjusting screw, first grip block 412 and second grip block 413 apart from corresponding diminishing or grow, can compensate the ball 2 wearing and tearing, the influence that brings such as the deformation of grip block, improve transmission precision further to can also carry out the first grip block 412 of adaptation and second grip block 413 distance according to the ball screw thread clearance of difference, extend drive mechanism 4's universality. The threaded holes are arranged in two in figure 6 and are respectively positioned at the root part and the end part of the adjusted clamping plate, and one or more threaded holes can be arranged, so long as the bending degree of the clamping plate can be adjusted through the adjusting screws. While the adjustment plate 414 is shown in fig. 7 to be disposed at the side of the second clamping plate 413, it is obvious that the adjustment plate 414 may also be disposed at the side of the first clamping plate 412, and the adjustment plate 414 and the clamping plate far from the adjustment plate 414 may be thicker, while the adjusted clamping plate near the adjustment plate 414 may be thinner, which may facilitate the bending of the adjusted clamping plate, so that the distance adjustment between the first clamping plate 412 and the second clamping plate 413 is more efficient.

Furthermore, a plurality of first balls are arranged between the opposite side surfaces of the inner slide rail 31 and the outer slide rail 32, a first retaining frame is arranged outside each first ball, and first rolling grooves are formed in the positions, corresponding to the first balls, of the inner slide rail 31 and the outer slide rail 32. Furthermore, a plurality of second balls are arranged between the inner slide rail 31 and the opposite side surfaces of the slide block 22, a second retainer is arranged outside each second ball, and second rolling grooves are arranged at the positions of the inner slide rail 31 and the outer slide rail 32 corresponding to the second balls. It can be understood that the degree of freedom of the inner slide rail 31 and the outer slide rail 32 in the non-slide rail setting direction is limited by the action of the first rolling groove and the first rolling ball, that is, the outer slide rail 32 can drive the rotary table 6 to perform pitching rotation along the rail extending direction of the inner slide rail 31, and meanwhile, the stability and the accuracy of the outer slide rail 32 and the rotary table 6 during movement are improved. The circumferential movement of the sliding block 22 is limited by the action of the second rolling groove and the second ball, that is, the sliding block 22 does not rotate along with the screw 21 but moves along the extending direction of the inner slide rail 31, and meanwhile, the smoothness and the accuracy of the sliding block 22 during movement are improved.

Further, a light control module 7 is arranged on the side surface of the base 1 parallel to the screw 21, the light control module 7 comprises a zero position shutter 72 fixedly connected with the base 1, the zero position shutter 72 corresponds to the middle of the inner slide rail 31, a zero position diaphragm 71 is arranged on the side surface of the rotary table 6 corresponding to the position of the zero position shutter 72, and the zero position diaphragm 71 corresponds to the middle of the outer slide rail 32. Furthermore, the light control module 7 includes two limit diaphragms 73 fixedly connected to the turntable 6 and two limit shutters 74 fixedly connected to the base 1, the two limit diaphragms 73 and the two limit shutters 74 are respectively located at the limit positions on both sides of the rotation motion of the turntable 6, and the limit diaphragms 73 are located between the limit shutters 74 on both sides. It will be appreciated that the zero position shutter 71 automatically stops when it moves to the zero position shutter 72, enabling the return to zero verification of the turntable 6. Two sets of limiting diaphragms 73 and limiting optical shutters 74 are respectively arranged at the limiting positions at the two sides to form negative limiting and positive limiting, so that the damage of internal moving parts caused by excessive rotation of the rotary table 6 is avoided, and the transmission precision is also ensured. In addition, the light control module 7 further includes a protective cover 75 fixedly connected to the side surface of the base, and the zero-position diaphragm 71, the zero-position shutter 72, the limit diaphragm 73 and the limit shutter 74 are covered therein to play a role in protection, so that the service life of the light control component is prolonged.

Furthermore, an operation hole 61 is formed in the middle of the rotary table 6 corresponding to the position of the screw 21, and the operation hole 61 is matched with the cover plate 62. It will be appreciated that the slide 22 and the transmission 4 can be easily accessed and adjusted through the access opening 61, and the cover plate 62 protects the internal structure.

Furthermore, one end of the screw 21 penetrating through the base 1 is provided with a third bearing 81, an outer ring of the third bearing 81 is fixedly connected with the base 1 through an installation frame 82, and one end of the screw 21 extending out of the third bearing 81 is provided with a driving mechanism for driving the screw 21 to rotate. It will be appreciated that the provision of the third bearing 81 makes the relative rotation of the lead screw 21 and the base 1 more stable, and the drive mechanism acts as a prime mover for the angular turret to drive the lead screw 21 in rotation, thereby effecting the pitch rotation of the turret 6. The driving mechanism can be a motor 83, a body of the motor 83 passes through, the connecting frame 82 is fixedly connected with the base 1, and a rotating shaft of the motor 83 is connected with the extending end of the screw rod 21 through a coupler 85. The drive mechanism may also include a hand wheel 84, the hand wheel 84 being connected to the end of the motor 83 remote from the coupling 85 for manual adjustment and control of the turntable 6.

Further, a supporting mechanism 9 for facilitating the smooth rotation of the screw 21 is arranged between one end of the screw 21 far away from the third bearing 81 and the base 1. It can be understood that base 1 is worn out so that link to each other with actuating mechanism to lead screw 21 one end, the other end is connected with base 1 rotation equally, set up supporting mechanism 9, avoid lead screw 21 overhanging end to take place vertical direction displacement along with slider 22, avoid lead screw 21 to damage when improving the motion precision, wherein supporting mechanism 9 includes the sleeve 91 of being connected with lead screw 21 tip rotation, sleeve 91 one end is passed the hole of stepping down on the base 1 and is cup jointed outside lead screw 21, the sleeve 91 other end is equipped with cutting ferrule 92, realize being connected of sleeve 91 and base 1.

It can be understood that the invention is also provided with a central controller, the core of the central controller can be a single chip microcomputer or a PLC, the motor 83, the zero-position optical shutter 72, the limit optical shutter 74 and the like are electrically connected with the central controller, the optical shutter transmits photoelectric signals to the controller, the controller adjusts the action of the motor 83 according to the setting after receiving the photoelectric signals, and can also display the rotation angle according to the potential of the optical shutter; in addition, the side surface of the base 1 is also provided with angle scales convenient for visual observation. These are conventional techniques or conventional choices in the art, are well known to those skilled in the art, and are not important to the improvement of the present technical solution, and will not be described herein for a short time.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

It will be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention, and do not indicate or imply that the components or mechanisms so referred to must be in a particular orientation, constructed and operated in a particular orientation, and thus are not to be considered as limiting the invention.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims

1. An angle turret comprising a base (1), characterized in that: the middle of the base (1) is provided with a ball screw (2), and the ball screw (2) comprises a screw (21) rotationally connected with the base (1) and a sliding block (22) capable of axially moving along the screw (21); arc-shaped sliding rails (3) are respectively arranged on two sides of the ball screw (2), each sliding rail (3) comprises an inner sliding rail (31) and an outer sliding rail (32) which are connected in a sliding manner, the inner sliding rail (31) is fixedly connected with the base (1), rotary tables (6) are erected on the outer sliding rails (32) on the two sides, and the rotary tables (6) are fixedly connected with the outer sliding rails (32); the sliding block (22) is provided with a transmission mechanism (4), and a transmission shaft (5) is arranged between the transmission mechanism (4) and the rotary table (6).

2. An angle turret according to claim 1, wherein: drive mechanism (4) include clamp splice (41) with slider (22) top rigid coupling, clamp splice (41) include connecting plate (411) parallel with lead screw (2), connecting plate (411) correspond transmission shaft (5) one side and are equipped with first grip block (412), second grip block (413), connecting plate (411), first grip block (412), second grip block (413) constitute C and press from both sides the chamber, set up first bearing (42), second bearing (43) with the heart in the centre gripping chamber, the inner circle of first bearing (42), the inner circle of second bearing (43) all with transmission shaft (5) rigid coupling, the outer lane of first bearing (42), second bearing (43) respectively with first grip block (412), the unilateral contact of second grip block (413).

3. An angle turret according to claim 2, wherein: one side that connecting plate (411) corresponds transmission shaft (5) is equipped with regulating plate (414), regulating plate (414) are parallel with second grip block (413), be equipped with a plurality of screw holes on regulating plate (414) face, wear to establish the adjusting screw that can be used to adjust first grip block (412) and second grip block (413) distance in the screw hole.

4. An angle turret according to claim 1, wherein: a plurality of first balls are arranged between the opposite side surfaces of the inner sliding rail (31) and the outer sliding rail (32), a first retaining frame is arranged outside each first ball, and first rolling grooves are formed in the positions, corresponding to the first balls, of the inner sliding rail (31) and the outer sliding rail (32).

5. An angle turret according to claim 1, wherein: a plurality of second balls are arranged between the opposite side surfaces of the inner sliding rail (31) and the sliding block (22), a second retainer is arranged outside each second ball, and second rolling grooves are formed in the positions, corresponding to the second balls, of the inner sliding rail (31) and the outer sliding rail (32).

6. An angle turret according to claim 1, wherein: the side that base (1) and lead screw (21) are parallel is equipped with light-operated module (7), light-operated module (7) include zero-position optical gate (72) with base (1) rigid coupling, zero-position optical gate (72) are corresponding with interior slide rail (31) middle part, revolving platform (6) side corresponds zero-position optical gate (72) position and is equipped with zero-position diaphragm (71), zero-position diaphragm (71) are corresponding with outer slide rail (32) middle part.

7. An angle turret according to claim 6, wherein: the light control module (7) comprises limiting diaphragms (73) fixedly connected with the rotary table (6) and limiting optical shutters (74) fixedly connected with the base (1), the limiting diaphragms (73) and the limiting optical shutters (74) are two groups and are respectively located at the limiting positions at two sides of the rotary table (6) in rotary motion, and the limiting diaphragms (73) are located between the limiting optical shutters (74) at two sides.

8. An angle turret according to claim 1, wherein: an operation hole (61) is formed in the middle of the rotary table (6) corresponding to the position of the lead screw (21), and the operation hole (61) is matched with the cover plate (62).

9. An angle turret according to claim 1, wherein: one end of the lead screw (21) penetrating through the base (1) is provided with a third bearing (81), the outer ring of the third bearing (81) is fixedly connected with the base (1) through an installation frame (82), and one end of the lead screw (21) extending out of the third bearing (81) is provided with a driving mechanism for driving the lead screw (21) to rotate.

10. An angle turret according to claim 9, wherein: and a supporting mechanism (9) which is convenient for the lead screw (21) to rotate stably is arranged between one end of the lead screw (21) far away from the third bearing (81) and the base (1).