CN114233718A

CN114233718A - Rotary driving device for measuring and positioning

Info

Publication number: CN114233718A
Application number: CN202111634015.XA
Authority: CN
Inventors: 姚顺利; 张锐; 陈雨晖; 郭海峰; 王晓鹏
Original assignee: Beijing No2 Machine Tool Works Co ltd
Current assignee: Beijing No2 Machine Tool Works Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-03-25
Anticipated expiration: 2041-12-29
Also published as: CN114233718B

Abstract

The invention relates to a rotary driving device for measuring and positioning.A fixed block and a movable block are arranged in an annular gap between a cylinder body and a rotating shaft, the fixed block and the movable block divide the annular gap into two oil cavities between the fixed block and the movable block in the circumferential direction, the cylinder body is provided with two oil holes for respectively communicating the two oil cavities, the oil holes are divided into two branch holes at the side of the oil cavities, a first branch hole is opened at the circumferential side wall of the fixed block corresponding to the corresponding oil cavity, a second branch hole is opened at the inner end wall of the cylinder body corresponding to the corresponding oil cavity and is positioned in a swinging area of the movable block, and a one-way valve only allowing a medium to flow into the corresponding oil cavity is arranged in the first branch hole. The invention also relates to a positioning measurement system adopting the rotary driving device. The driving device realizes the buffering of the starting and stopping processes, has simple structure, convenient installation, reliability and durability, and is beneficial to improving the efficiency and the reliability of the measuring and positioning of a machine tool or other application equipment.

Description

Rotary driving device for measuring and positioning

Technical Field

The invention relates to a rotary driving device for measuring and positioning, which is mainly used for measuring and positioning and rotary driving in other occasions.

Background

In the positioning measurement driving mechanism, the commonly adopted driving structure forms of positioning measurement in domestic and external machine tool host manufacturers, especially grinding machines, include a linear driving mode and a rotary driving mode, wherein the linear driving mode is to provide linear driving power through a hydraulic oil cylinder or a pneumatic cylinder, and to ensure the linear driving power through the guiding of components such as a linear guide rail and the like, so as to push a measuring component to perform positioning measurement, and the rotary driving mode is to provide rotary driving power through a vane type swing oil cylinder or convert linear motion into rotary motion through a gear rack mechanism, so as to drive the measuring component to perform positioning measurement. The blade type swing oil cylinder or the gear rack rotating mechanism in the rotary driving mode has no speed reduction buffer or too fast buffer speed reduction in the rotary positioning process, and has certain influence on the use stability and the service life of a measuring device fixed at the end part.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the rotary driving device which is suitable for measurement positioning and other occasions, so as to avoid or alleviate the problem of no speed reduction buffer in the rotary positioning process of the conventional rotary driving device.

The technical scheme of the invention is as follows: measure rotation driving device of location, include the cylinder body and pass the cylinder body and with cylinder body swivelling joint's pivot, be equipped with fixed block and movable block in the annular gap between cylinder body and the pivot, the fixed block with the movable block in radial and axial respectively with the cylinder body inner wall with pivot surface seal will in the week annular gap separates for being located two oil pockets between the two, and the shared region of each oil pocket or oil pocket size can change according to the rotation angle of movable block, but the volume sum of two oil pockets is unchangeable, be equipped with two oilholes (or weighing the main oilhole) that are used for communicateing two oil pockets respectively on the cylinder body, the oilhole is divided into two way fulcrums (the oilhole that is used as the branch road) on the oil pocket side, first fulcrums in two way fuls the fixed block corresponds to the circumference lateral wall of corresponding oil pocket, second fulcrumpling in the cylinder body correspond to the inner endwall of corresponding and be located the swing region of movable block (the movable block is at the worker's region (the movable block is at the oilhole) In the region where the corresponding side circumferential edge of the end face thereof can slide during the interval rotation, that is, in the region where the movable block can cover/block at a part of the rotation angle and cannot cover/block at the other part of the rotation angle), the communication of the oil hole with the corresponding oil chamber is realized through these openings.

Preferably, in the two branch holes of the same oil hole, the diameter of the first branch hole is smaller than that of the second branch hole, and generally, the flow area (or cross-sectional area) of the first branch hole may be significantly smaller than that of the second branch hole, for example, 1/10-1/2 of the flow area of the second branch hole, and the specific ratio may be set according to the control/buffer requirement.

Preferably, the first branch hole is provided with a one-way valve which only allows the medium to flow into the corresponding oil chamber.

Preferably, the opening of the second branch hole is located at a circumferential middle of the corresponding side swing region of the movable block.

The opening of second branch hole can be circular, also can be the rectangular shape that the tangential (perpendicular to radial and axial direction) extends or the arc of circumference extension, through setting up the opening into rectangular shape or arc, has increased the length of opening in the movable block direction of motion, helps realizing better buffering.

The main body portion of the second branch hole is generally a circular hole, and the main body portions of the oil hole and the first branch hole are also generally circular holes so as to facilitate machining and facilitate medium flow.

When the opening of the second branch hole is not a round hole with the same diameter as the main body part of the second branch hole, a transition hole section with gradual change is preferably arranged between the main body part of the second branch hole and the opening of the second branch hole.

Preferably, the fixed block is an axially extending cylinder, the radial inner side surface of the fixed block is an arc surface (the cross-sectional line is a cylindrical surface of an arc) which can be attached to the surface of the rotating shaft, and the radial outer side surface of the fixed block is an arc surface which can be attached to the inner side surface (the radial inner wall) of the cylinder body.

Preferably, the movable block is a cylinder extending axially, the radial inner side surface of the movable block is an arc surface capable of being attached to the surface of the rotating shaft, and the radial outer side surface of the movable block is an arc surface capable of being attached to the inner side surface of the cylinder body.

Preferably, the cylinder comprises a cylindrical body.

Preferably, the first end (the corresponding end in the axial direction) of the cylindrical main body is open and is provided with a gland (or called cylinder body gland) for plugging the opening, the gland is fixedly connected to the first end of the cylindrical main body and is provided with a rabbet which is matched with the first end port of the cylindrical main body, the inner end surface positioned at the inner side of the first end port of the cylindrical main body is in sealing fit with the corresponding end surfaces of the fixed block and the movable block, the corresponding end surfaces of the movable block are allowed to rotate relatively, the center of the gland is provided with a shaft hole for penetrating through the rotating shaft, and a sealing material is arranged between the inner wall of the shaft hole of the gland and the rotating shaft (for example, a sealing ring is embedded in an annular groove in the inner wall of the shaft hole).

Preferably, the second end of the cylindrical main body is provided with an integrated closed end plate, the center of the closed end plate is provided with a shaft hole for penetrating through the rotating shaft, and a sealing material is arranged between the inner wall of the shaft hole of the closed end plate and the rotating shaft (for example, a sealing ring is embedded in an annular groove in the inner wall of the shaft hole).

Preferably, an axial groove structure for embedding a bearing is arranged on the axial outer side surface of the gland, a first bearing is installed on the axial groove structure of the gland, the corresponding end of the rotating shaft is rotatably connected with the gland through the first bearing, and a shaft hole for penetrating through the rotating shaft is formed in the gland.

Preferably, be equipped with the axial groove structure that is used for inlaying the dress bearing on the axial lateral surface of closed end plate, the structural second bearing that installs of axial groove of closed end plate, the corresponding end of pivot pass through the second bearing with closed end plate swivelling joint, be equipped with on the closed end plate and be used for passing the shaft hole of pivot.

The rotary shaft may be provided with a shaft extension (an exposed portion of the rotary shaft) extending from the second end of the cylinder body to the outside of the cylinder body for external connection.

The measuring and positioning system comprises a rotating shaft connecting arm and a rotating driving device, wherein the rotating shaft connecting arm is fixedly arranged on a shaft extension (an exposed part of a rotating shaft for connecting an external part) of the rotating driving device, a positioning measuring device (such as a positioning measuring instrument) is arranged at the outer end of the rotating shaft connecting arm directly or through a connecting piece, and the rotating driving device is any one of the rotating driving devices for measuring and positioning disclosed by the invention.

A position signal switch (or other form of sensor for acquiring a position signal), such as a proximity switch, is mounted on the rotary driving device (e.g., on the housing, or on the outer surface of the stator, or on a frame for mounting the rotary driving device), and a trigger element, such as a screw, is provided at the rear end of the rotating shaft connecting arm, and is capable of triggering the position signal switch to change the switch state by approaching or contacting the position signal switch, and the trigger element is specifically of a type and is provided in a manner that the mounting positions (including the relative positions) and the postures (directions) of the position signal switch and the trigger element can be determined as required according to the matching requirements of the position signal switch.

The pivot connecting arm may be generally linear or generally L-shaped, or may take any suitable shape and/or configuration depending on the particular application.

The connecting arm of the rotating shaft can be provided with (or connected with) a connecting rod for extending the length of the connecting arm, and can also be provided with a transmission mechanism for driving the positioning and measuring device to move, for example, a gear rack mechanism or a screw transmission mechanism, and the transmission mechanism can adopt an electric motor and the like as driving power. In this case, the positioning and measuring device may be slidably connected to the connecting arm of the rotating shaft via a sliding connection device (a linear motion pair, for example, a guide rail and a slider matched with the guide rail), and a sliding part of the sliding connection device is fixedly connected to a moving part of the transmission mechanism (including arranging the two as one piece), thereby realizing position adjustment of the measuring and positioning device by driving the transmission mechanism.

The invention has the beneficial effects that: the rotary driving device is characterized in that oil holes communicated with oil cavities are equally divided into two branch holes, a first branch hole of the two branch holes is opened on the side wall of a fixed block, a second branch hole of the two branch holes is opened on the end surface (inner end surface of a gland) of the oil cavity, in the rotating process of a movable block, the openings of the two second branch holes are respectively blocked (gradually opened or gradually closed) by the movable block in an initial stage (stage that the movable block is positioned in a region adjacent to a starting point and the starting point) and in an end stage (stage that the movable block is positioned in a region adjacent to an end point and the end point), slow starting and slow stopping are realized, the openings of the two second branch holes are not blocked in the middle process, quick action can be realized, the rotating speed of the movable block is ensured, and therefore, rapid change of the speed and rapid impact of the movable block on the fixed block are avoided through the buffering action of the initial stage and the end stage, and the accelerating/decelerating process is smooth, the device does not generate extra vibration due to rapid acceleration or rapid deceleration, thereby not only contributing to the improvement of the service life, but also contributing to the stabilization of the positioning system and contributing to the improvement of the positioning accuracy.

The driving device has the advantages of simple structure, convenience in installation, reliability and durability, the efficiency and the reliability of the machine tool measurement and positioning are improved, and the structure of the driving device has instructive significance for the development of other measurement and positioning driving devices. But also can be used for the rotary drive of other occasions and other devices.

Drawings

Fig. 1 is a schematic longitudinal sectional view of a driving device according to the present invention;

FIG. 2 is a schematic structural view of the M-M section shown in FIG. 1 (intermediate state);

FIG. 3 is a schematic structural view of the M-M section shown in FIG. 1 (the minimum state of the G-cavity);

FIG. 4 is a schematic structural view of the M-M section shown in FIG. 1 (H-chamber minimum state);

5-8 are schematic diagrams showing the effect of the rotation process of the movable block from the minimum state of the G cavity to the maximum state of the G cavity on the opening of the second branch hole;

FIG. 9 is a schematic diagram (N direction) of the construction and operation of one embodiment of a survey positioning system according to the present invention;

fig. 10 is a schematic view (N direction) of the configuration and operation of another embodiment of the measurement positioning system according to the present invention.

The labels in the figure are: 1. the oil cylinder comprises a rotating shaft, 2, a cylinder body, 3, a movable block, 4, a gland, 5, a first bearing, 6, a first bearing inner gland, 7, a first bearing outer gland, 8, a one-way valve, 9, a fixed block, 10, a key (or a connecting key), 11, a second bearing, 12, a second bearing gland, 14, a positioning pin, 15, a screw, 16, a position signal switch, 17, a rotating shaft connecting arm a, 18, an extension connecting rod, 19, a positioning measuring device, 20, a connecting plate, 21, a fixed connecting screw rod, 22, a rotating shaft connecting arm B, 96, a sector inclined plane, 98, a tangential inclined plane, A1, a first main oil hole (or a main oil hole 1), B1, a first branch hole (or A1 branch 1 oil hole), C1, a second branch hole (or A1 branch 2 oil hole), A2, a second main oil hole (or main oil hole 2), B2 and a first branch hole (A2) of the second main oil hole, c2, a second branch hole of a second main oil hole (or called A2 branch 2 oil holes), d, a movable block angle, e, a fixed block angle, f, a swing angle, G, a first oil cavity (or called oil cavity 1 or G cavity), H and a second oil cavity (or called oil cavity 2 or H cavity).

Detailed Description

Referring to fig. 1-8, the rotary driving device mainly comprises a cylinder body 2 and a rotating shaft 1 which penetrates through the cylinder body and is respectively connected with two ends of the cylinder body in a rotating manner, a fixed block 9 and a movable block 3 are arranged in an annular gap between the cylinder body and the rotating shaft, the fixed block and the movable block are in a fan shape (the general outline is approximately a fan shape), the inner side surface and the outer side surface in the radial direction are both in a cylindrical surface (the cross section line is a circular cylindrical surface), the fixed block is fixedly arranged on the inner wall of the cylinder body, the radial inner surface of the fixed block is in sealing sliding fit with the rotating shaft (a matching mode which allows relative sliding and sealing), the movable block is fixedly connected on the rotating shaft, the radial outer surface of the movable block is in sealing sliding fit with the inner wall of the cylinder body, the inner walls at two ends of the cylinder body are respectively in sealing (between the fixed block) or sealing sliding fit (between the movable block) with corresponding end surfaces of the fixed block and the movable block, the fixed block angle (the central angle of the sector cross section) e and the movable block angle d are together smaller than 360 degrees, so that two sector-shaped chambers (oil chambers) G, H can be formed between the movable block and the fixed block, the size of the two oil chambers (which can be called as a G chamber and an H chamber) changes along with the rotation of the movable block, but the total volume of the two chambers is not changed, the theoretical maximum value of the swing angle f of the movable block is 360 degrees- (e + d), but an angle smaller than (at least not larger than) 360 degrees- (e + d) can be selected based on the convenience in process and control. By selecting proper e and/or d, the allowable value range of f can be changed, so that the value of f meets the use requirement.

The rotating angle of the rotating shaft 1 (i.e. the rotating angle f of the movable block) depends on the angle d of the movable block 3 and/or the angle e of the fixed block 9, the size of f can be adjusted by adjusting the size of d and/or e, the size of d or e can be adjusted independently, and the size of d and e can also be adjusted simultaneously.

A first main oil hole A1 and a second main oil hole A2 are arranged on a cylinder body and are respectively used for communicating two oil cavities (a G cavity and an H cavity), the first main oil hole A1 is divided into two paths at the oil cavity side, the two paths are respectively a first branch hole B1 and a second branch hole C1 of the first main oil hole, the second main oil hole A2 is also divided into two paths at the oil cavity side, the two paths are respectively a first branch hole B2 and a second branch hole C2 of the second main oil hole, the main oil holes and the branch holes of the two oil cavities can adopt the same or symmetrical structure and distribution mode, corresponding oil holes respectively communicated with the B1 and the B2 in a gland 4 are processed in a fixed block 9, one-way valves 8 are respectively arranged in the B1 and the B2, the A1, the B1 and the C1 are only communicated with the G cavity, the A2, the B2 and the C2 are only communicated with the H cavity and are respectively used for realizing corresponding oil supply and oil return.

The cylinder body (including the gland) or the cylinder body and the fixing block can be provided with the inner oil hole according to the prior art, so that the communication of the corresponding oil hole is realized.

The specific connection or assembly of the parts in the drive device may be according to the prior art. For example, the gland 4 of the cylinder is fixed with the cylindrical main body of the cylinder 2 by a screw, the fixed block 9 is fixed with the cylinder body 2 by a positioning pin 14 and a screw (a screw, a bolt and other threaded fastener) 15, the movable block 9 is fixed with the cylinder body 2 by a positioning pin 14 and a screw 15, the rotating shaft 1 is fixed with the movable block 3 by a connecting key 10, the first bearing 5 and the second bearing 11 are fixed with the first bearing inner gland 6, the first bearing outer gland 7 and the second bearing cap 12 by screws, the rotating shaft 1 is fixed in the cylinder body 2 formed by the cylindrical main body of the cylinder body and the gland 4 by using the first bearing 5 and the second bearing 11, and by the above structure, the rotating shaft 1 is constrained to have only one rotational degree of freedom, and the shaft extension extending from the second end of the cylinder body is used for connecting with the driving/driving devices/members carried by the rotating shaft, for example, the rotating shaft connecting arm of the measuring and positioning device.

Because the movable block can rotate to any position in the working area, the sizes of the G cavity and the H cavity are changed along with the rotation of the movable block, and the changing directions are opposite (one is increased and the other is decreased), and the sizes are equal. Fig. 2 shows a state in which the G chamber and the H chamber are equal in size, fig. 3 and 4 show that the movable block rotates to an extreme position on the G chamber side and an extreme position on the H chamber side, respectively, and at the extreme position on the G chamber side, the G chamber is in a minimum state Gmin, in which the volume can theoretically be zero, but the volume of the minimum state is not zero (see the following description) due to the control requirement of the present invention, and when the G chamber is in the minimum state, the H chamber is in a maximum state Hmax (as shown in fig. 3), and similarly, when the H chamber is in the minimum state Hmin, the G chamber is in the maximum state Gmax (as shown in fig. 4).

The circumferential side surface of the movable block may be a sector inclined surface (passing through a radius of a corresponding position and a plane surface of a central axis, and being consistent with a direction/angle of the circumferential side surface of the sector at the corresponding position), the circumferential side surface of the opening of the fixed block without the second branch hole may also be a sector inclined surface, a radial inner side of the circumferential side surface of the opening of the second branch hole on the fixed block may be a chamfer-shaped inclined surface 98, the rest (a part outside the chamfer-shaped inclined surface) may be a sector inclined surface 96, an angle slightly smaller than 180 ° is formed between the chamfer-shaped inclined surface and the corresponding sector inclined surface, for example, an arbitrary angle within a range of 176 ° (including an end value) of 170- The section is wedge-shaped clearance) (see Gmin shown in fig. 3 or Hmin shown in fig. 4), when the starting rotation is carried out under the state, the hydraulic oil fed from the opening of the corresponding second branch hole enters the wedge-shaped clearance, the oil pressure is formed in the wedge-shaped clearance, the movable block is pushed to rotate, and as the contact area of the hydraulic oil in the wedge-shaped clearance and the corresponding side surface of the movable block is far larger than the area of the opening of the corresponding second branch hole, the static friction force and other static resistance can be overcome without excessively high oil pressure (pressure), the movable block and the rotating shaft are pushed to rotate, so that the starting oil pressure requirement is obviously reduced, the starting is easy to start, and obvious vibration cannot be generated in the process that the movable block is separated from the fixed block.

The working principle or working process of the driving device can be seen in fig. 5-8.

Assuming that the initial position is the state shown in fig. 5, the movable block is located at the extreme position in the direction of the G cavity, the G cavity is in the minimum state, the first main oil hole a1 is used as an oil inlet hole, the second main oil hole a2 is used as an oil return hole, hydraulic oil is introduced into a1 communicated with the G cavity, the hydraulic oil is divided into two branches through B1 and C1, the opening of C1 is blocked by the movable block 3, a check valve 8 is arranged in the branch of B1, the hydraulic oil flows into the oil cavity G through the check valve 8, the flow rate of the oil inlet is small due to the small aperture of B1, the rotating speed of the rotating shaft 1 is slow, after the movable block 3 rotates to a certain angle, the opening of the branch hole C1 blocked by the movable block 3 is gradually opened to the position shown in fig. 6, because the aperture of C1 is larger than that of B1, the hydraulic oil with a larger flow rate enters the enlarged G cavity through C1, the movable block 3 drives the rotating shaft 1 to rotate, and in the above process, the opening of the C2 communicated with the H cavity is always opened, the oil return from the H chamber is not hindered, when the movable block 3 rotates to the position shown in fig. 7, the movable block 3 gradually shields the opening of the C2, at this time, although the opening of the C1 communicated with the G chamber is still completely opened, the opening of the C2 communicated with the H chamber is gradually shielded, the oil return is blocked, the flow rate is smaller and smaller, the rotation speed of the rotating shaft 1 is correspondingly gradually slowed down, after the opening of the C2 is completely shielded by the movable block 3, because the check valve in the B2 always prevents the backflow from the B2, the hydraulic oil in the H chamber does not flow out any more, the rotating shaft 1 stops rotating, the movable block 3 reaches the limit position in the direction of the H chamber, at this time, the G chamber becomes the maximum state, and the H chamber is the minimum state (as shown in fig. 8).

The specific location of the openings of C1 and C2 on the gland may be determined in accordance with the control requirements described above.

In the above process, the rotating shaft 1/the movable block 3 completes the process of starting-slow rotation-fast rotation-slow rotation-stop, and the speed change is continuous and slowly changed.

This drive arrangement has following characteristics, and then has guaranteed the stability and the effectual buffering of operation:

1) when the G cavity is in the minimum state and the H cavity is in the minimum state, the movable block 3 and the fixed block 9 are in surface contact, so that the stability and accuracy of positioning are ensured;

2) the buffering of the starting process and the stopping process is realized by gradually changing (gradually increasing or gradually reducing) the oil pressure difference on two sides of the movable block by means of the opening degree or the resistance change of the oil hole, so that the rotating speed of the movable block is gradually changed, the impact inertia in the starting or stopping process is effectively reduced, and no mechanical collision or impact exists, so that the motion stability of the positioning measuring device (or other systems adopting the driving device) is ensured, and the stable and reliable structural rigidity is provided for the measuring process.

3) Through the sheltering from or releasing of movable block 3 to the opening of second branch hole C1 or C2 in rotatory in-process, realized effectual buffering, and in the middle stage C1 all open completely with the opening of C2, realized the fast rotation of pivot, avoided the too much influence to the functioning speed.

4) The size of the rotation angle range depends on the angle d of the movable block 3 and the angle e of the fixed block 9, and in general, the rotation angle f can be changed by adjusting the angle d of the movable block 3 in a small range, so that the diversity of the design and adjustment of the rotation angle is realized.

Fig. 9 and 10 show two embodiments of the measuring and positioning device using the driving device, and the two embodiments mainly use different configurations of the rotating shaft connecting arm, which are two common or typical configurations of the rotating shaft connecting arm, and can be flexibly arranged according to practical use.

In fig. 9 and 10, two different states of the connecting arm of the rotating shaft are shown in solid lines and dashed lines, respectively, corresponding to the extreme positions of the connecting arm of the rotating shaft in two directions, i.e. the extreme positions of the rotating shaft of the present driving device in two directions, and the connecting arm of the rotating shaft can be rotated from one extreme position to the other extreme position by the rotation of the rotating shaft.

The rotating shaft connecting arm 17 shown in fig. 9 is connected with an extension connecting rod 18, the extension connecting rod is tubular, the outer end of the extension connecting rod is provided with a connecting plate 20 pressing on the port, a fixed connecting screw 21 passes through the tube hole of the extension connecting rod, the inner end of the extension connecting rod is fixedly connected with the rotating shaft connecting arm (for example, screwed on the corresponding screw hole of the rotating shaft connecting arm), the outer end of the extension connecting rod is screwed with a nut pressing on the outer side of the connecting plate, the nut is screwed, the extension connecting rod and the rotating shaft connecting arm can be fixed together through the connecting plate, the extension connecting rod can be regarded as a part of the rotating shaft connecting arm, or the spindle connection arm 17, the extension connection rod 18, the fixed connection screw 21 and the connection plate 20 together form a complete, linearly extending spindle connection arm, and the positioning and measuring device 19 is fixedly mounted at the outer end of the extension connection rod via a connection member/connection structure (e.g., a fastening screw).

The embodiment shown in fig. 10 uses an L-shaped connecting arm 22 of the rotating shaft, the connecting arm is integrated into a whole, a folded plate section for installing the positioning and measuring device 19 is arranged at the outer end of the connecting arm, a mounting hole for installing the positioning and measuring device is arranged on the folded plate section, the housing of the positioning and measuring device 19 passes through the mounting hole and is fastened on the folded plate section through screws, and a flange for fixing the screws can be arranged on the housing of the positioning and measuring device 19.

The connection of the various spindle connection arms on the spindle extension of the spindle can be carried out in the prior art. For example, a connecting hole capable of being sleeved on the shaft extension is arranged, the shaft extension is sleeved through the connecting hole, and the shaft extension is fixed through a positioning screw penetrating through the hole wall of the connecting hole.

The position signal switch 16 or other type of sensor for acquiring a position signal may be mounted on a housing of the driving device, or may be mounted on a mounting frame (or other mounting base) of the driving device, and a connecting bracket for mounting the position signal switch or other type of sensor may be configured as required, and accordingly, a trigger element of the position signal switch 16 or other type of sensor for acquiring a position signal is disposed at a suitable position of the connecting arm of the rotating shaft, and when the connecting arm of the rotating shaft rotates to a trigger position (angle), the trigger element triggers the position signal switch 16 or other type of sensor for acquiring a position signal to generate a corresponding position signal.

The technical means disclosed by the invention can be combined arbitrarily to form a plurality of different technical schemes except for special description and the further limitation that one technical means is another technical means.

Claims

1. Measure the rotary driving device of location, include the cylinder body and pass the cylinder body and with cylinder body swivelling joint's pivot, be equipped with fixed block and movable block in the annular gap between cylinder body and the pivot, the fixed block with the movable block in radial and axial respectively with the cylinder body inner wall with pivot surface seal will in the week annular gap separates for being located two oil pockets between the two, be equipped with two oilholes that are used for communicateing two oil pockets respectively on the cylinder body, its characterized in that the oilhole is two way fulcrums in the oil pocket side branch, first fulcrum opening in two way fulcrums in the fixed block corresponds to the circumference lateral wall of corresponding oil pocket, second fulcrum opening in the cylinder body is corresponding to the inner end wall of corresponding oil pocket and is located in the swing region of movable block.

2. The rotary drive apparatus for measuring positioning according to claim 1, wherein the diameter of the first branch hole is smaller than the diameter of the second branch hole in two branch holes of the same oil hole.

3. A rotary drive apparatus for measuring positioning as claimed in claim 1, wherein said first branch hole is provided with a check valve for allowing only a medium to flow into the corresponding oil chamber.

4. The rotary drive apparatus for measuring positioning according to claim 1, wherein the opening of the second branch hole is located at a circumferential middle of the corresponding side swing region of the movable block.

5. A rotary drive apparatus for measuring positioning as in claim 1, wherein the opening of said second branch hole is circular, or elongated in a tangential direction, or circular in a circumferential direction.

6. A rotary drive apparatus for measuring and positioning according to any one of claims 1 to 5, wherein the fixed block and the movable block each have an axially extending cylindrical shape, and each of the radially inner side surfaces thereof has an arc surface capable of being fitted to the surface of the rotary shaft, and each of the radially outer side surfaces thereof has an arc surface capable of being fitted to the inner side surface of the cylinder body.

7. A rotary drive apparatus for measuring positioning as set forth in claim 6, wherein said cylinder includes a cylindrical body, the first end of the cylindrical main body is open and is provided with a gland for plugging the opening, the gland is fixedly connected with the first end of the cylindrical main body and is provided with a tongue-and-groove which is involutive with the first end port of the cylindrical main body, the inner end surface positioned at the inner side of the first end port of the cylindrical main body is in sealing fit with the corresponding end surfaces of the fixed block and the movable block, and allows the corresponding end surfaces of the movable blocks to rotate relatively, the center of the gland is provided with a shaft hole for penetrating the rotating shaft, a sealing material is arranged between the inner wall of the shaft hole of the gland and the rotating shaft, the second end of the cylindrical main body is provided with an integrated closed end plate, the center of the closed end plate is provided with a shaft hole used for penetrating through the rotating shaft, and a sealing material is arranged between the inner wall of the shaft hole of the closed end plate and the rotating shaft.

8. The rotary drive device for measuring and positioning according to claim 7, wherein an axial groove structure for inserting a bearing is provided on an axial outer side surface of the gland, a first bearing is installed on the axial groove structure of the gland, a corresponding end of the rotary shaft is rotatably connected to the gland through the first bearing, a shaft hole for passing through the rotary shaft is provided on the gland, an axial groove structure for inserting a bearing is provided on an axial outer side surface of the closed end plate, a second bearing is installed on the axial groove structure of the closed end plate, a corresponding end of the rotary shaft is rotatably connected to the closed end plate through the second bearing, and a shaft hole for passing through the rotary shaft is provided on the closed end plate.

9. A rotary drive for measuring positioning as claimed in claim 8, wherein the shaft is provided with an axial extension extending from the second end of the cylinder to outside the cylinder.

10. The measuring and positioning system comprises a rotating shaft connecting arm and a rotary driving device, wherein the rotating shaft connecting arm is fixedly installed on a shaft extension of the rotary driving device, and the outer end of the rotating shaft connecting arm is directly provided with a positioning measuring device or is provided with a positioning measuring device through a connecting piece, and the measuring and positioning measuring system is characterized in that the rotary driving device is the rotary driving device for measuring and positioning according to claim 1.