CN213629680U - Indexing mechanism for quickly finding north and tracking azimuth of holder - Google Patents

Abstract

The utility model relates to a indexing mechanism for fast north finding and azimuth tracking of a tripod head, which comprises a support frame, a central shaft, a platform body and an indexing mechanism, wherein the central shaft is vertically and fixedly arranged in the support frame, a positioning cavity is arranged in the central shaft, positioning balls are elastically arranged in the positioning cavity, the platform body is arranged in a rotating way around the central shaft, and the indexing mechanism is arranged in the platform body; the indexing mechanism comprises a worm wheel sleeved on the central shaft, an azimuth screw group fixedly arranged on the inner side wall of the table body and a lock cylinder group; the side wall of the platform body is provided with an insertion hole, the position of the insertion hole corresponds to that of the azimuth screw group, a single-axis optical fiber gyroscope and an encoder are fixedly arranged in the platform body, and the first shaft part of the encoder is fixedly connected with the top end of the central shaft. The utility model discloses a mode of manual transposition through whether relative rotation between lock core group control worm wheel and the central shaft for the stage body has manual wide-angle rotation and moves the function of fine setting, and the simple operation has good practicality.

Description

Indexing mechanism for quickly finding north and tracking azimuth of holder

Technical Field

The utility model relates to a cloud platform measures technical field, especially relates to a indexing mechanism that is used for cloud platform to seek north and azimuth tracking fast.

Background

The holder device is a matched device for installing and supporting the laser irradiation instrument, and mainly has the functions of providing a horizontal posture and an azimuth reference for the ground laser irradiation instrument, and an operator continuously adjusts the posture and the azimuth of the laser irradiation instrument according to the motion change of an actual target in a certain distance range to realize real-time tracking irradiation of the target. Therefore, the pan-tilt system is required to quickly provide the azimuth angle information of 0-360 degrees of the laser irradiation instrument in real time and output the tracking azimuth angle in real time according to the change of the target.

Most of the existing holder devices realize the north-seeking tracking function mainly through different transposition structure designs and depending on methods such as a gyroscope multi-position north-seeking method and data fusion of various angle sensors. The indexing mechanism is used as an important part in the holder and is used for realizing indexing control of the holder, the existing indexing mechanism is heavy in weight and large in size, cannot meet the requirements of portable use, is high in cost and low in indexing precision, does not have an inertial orientation function and a fine adjustment self-locking function, part of the indexing mechanism is driven by a motor, and the use of the indexing mechanism is limited to a certain extent under the condition that an external reliable power supply or a power supply fault per se does not exist. Therefore, the indexing mechanism for quickly finding the north and tracking the azimuth of the holder is provided.

Disclosure of Invention

The utility model discloses a solve the problem that current indexing mechanism is bulky, motor drive has the limitation, provide an indexing mechanism that is used for the cloud platform to seek north and orientation tracking fast, reach indexing mechanism compact structure, the high purpose of reliability, can realize four quick transposition of position of wide-angle and low-angle fine setting, trail and auto-lock.

In order to achieve the above object, the utility model adopts the following technical scheme:

a transposition mechanism for quickly finding north and tracking azimuth of a tripod head comprises a support frame, a central shaft, a table body and a transposition mechanism, wherein the central shaft is vertically and fixedly arranged in the support frame, the central shaft is of a hollow stepped shaft structure, a positioning cavity is formed in the central shaft, positioning balls are elastically arranged in the positioning cavity, the table body is rotatably arranged around the central shaft, and the transposition mechanism is arranged in the table body and used for realizing rotation of the tripod head;

the indexing mechanism comprises a worm wheel sleeved on the central shaft and is used for positioning the rotation of the central shaft;

the azimuth screw group is fixedly arranged on the inner side wall of the table body and is used for driving the worm wheel to rotate so as to drive the table body to rotate;

and a lock core group for controlling the relative rotation of the worm wheel and the central shaft;

the side wall of the table body is provided with an insertion hole, the position of the insertion hole corresponds to that of the azimuth screw group, and a single-axis optical fiber gyroscope is fixedly arranged in the table body and used for sensing an azimuth angle;

and the first shaft part of the encoder is fixedly connected with the top end of the central shaft.

Further, the central shaft and the table body are rotatably connected through a bearing;

the bearing is sleeved at the shaft shoulder of the central shaft, an annular locking nut is connected to the central shaft in a threaded manner, and the locking nut abuts against the inner ring of the bearing to fix the inner ring of the bearing;

the stage body is arranged on the bearing outer ring, a lower shaft cover and a lower pressing ring are further sleeved on the central shaft at the bottom of the stage body, the lower shaft cover and the lower pressing ring are sequentially connected through bolts, and the lower shaft cover abuts against the bearing outer ring to fix the bearing outer ring.

Furthermore, a pressure spring is arranged in the positioning cavity, and one end of the pressure spring is fixedly connected with the positioning ball;

the worm wheel comprises an integrally formed wheel part and a hollow shaft part II, the whole cross section is in a 'seam-shaped' shape after the wheel part and the shaft part II are connected, and a slide way with an arc-shaped cross section is arranged on the inner side of the joint of the wheel part and the shaft part II;

and four circular positioning holes are formed in the upper ends of the second shaft parts at intervals of 90 degrees in the circumferential direction, and the positioning ball is arranged in one positioning hole.

Further, position screw group is including linking firmly the position seat at the stage body inner wall, with the worm that the position seat rotated to be connected and set up the shaft coupling in worm one end, worm and worm wheel meshing, the shaft coupling with the jack position corresponds.

Furthermore, the lock cylinder group comprises a lock cylinder and four locking balls which are annularly arranged on the side wall of the central shaft, the lock cylinder is of a hollow cylinder structure, the lock cylinder is in threaded connection with the inside of the central shaft, a plurality of retaining sleeves are further arranged between the lock cylinder and the central shaft, and O-shaped rings are arranged between adjacent retaining sleeves;

the upper end surface and the side surface of the lock core are in inclined chamfer transition to form an extrusion surface with a cross section in a horizontal and vertical shape.

Furthermore, the locking ball is inserted in the central shaft, the locking ball is drum-shaped, two ends of the locking ball are planes, the middle part of the locking ball is a spherical surface, one side of the spherical surface of the locking ball is arranged outside the central shaft and is in contact with the slideway, and the other side of the spherical surface of the locking ball is arranged in the central shaft and is in contact with the extrusion surface.

Through the technical scheme, the beneficial effects of the utility model are that:

the utility model has the advantages of reasonable design, the stage body can be manual carry out the quick transposition of wide-angle, realize each other the transposition of four positions for 90, accomplish the relevant weight of single-axis fiber gyroscope measurement earth rotation, calculate the azimuth of relative north, adopt worm gear's drive mode simultaneously, compact structure, volume and weight have been reduced, portable not only saves structural space, but also can drive the stage body and realize fine setting in position, rotatory and auto-lock, have the transposition precision height, characteristics that the reliability is high, operating personnel's work efficiency has been improved.

The utility model discloses a mode of manual transposition through whether relative rotation between lock core group control worm wheel and the central shaft for the stage body has the function of manual wide-angle rotation and fine setting, carries out in good time adjustment according to actual need, and the simple operation can use widely.

Drawings

Fig. 1 is an overall structure diagram of the indexing mechanism for quickly finding north and tracking azimuth of the pan/tilt head of the present invention.

Fig. 2 is the cross-sectional view of fig. 1 of the indexing mechanism for fast north finding and azimuth tracking of the pan/tilt head of the present invention.

Fig. 3 is an enlarged schematic view of the table body and the central shaft mounting structure of the indexing mechanism for fast north finding and azimuth tracking of the pan/tilt head of the present invention.

Fig. 4 is a schematic view of a slide structure of a indexing mechanism for fast north finding and azimuth tracking of a pan/tilt head, wherein locking balls are not shown.

Fig. 5 is a sectional view from a-a in fig. 2 of an indexing mechanism for fast north-finding and azimuth tracking of a pan/tilt head according to the present invention.

Fig. 6 is a sectional view from B-B in fig. 2 of the indexing mechanism for fast north-finding and azimuth tracking of the pan/tilt head according to the present invention.

The reference numbers in the drawings are as follows: the device comprises a support frame 1, a core sleeve 101, a threaded sleeve 102, a central shaft 2, a table body 3, a box body 31, a box cover 32, a pressing surface 4, a positioning ball 5, a worm wheel 6, a wheel part 61, a second shaft part 62, an insertion hole 7, a single-shaft fiber gyroscope 8, an encoder 9, a bearing 10, a locknut 11, a lower shaft cover 12, a lower pressing ring 13, a pressure spring 14, a sliding way 15, a positioning hole 16, an azimuth seat 17, a worm 18, a coupler 19, a lock cylinder 20, a locking ball 21, a retaining sleeve 22 and an O-shaped ring 23.

Detailed Description

The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings:

as shown in fig. 1 to 6, an indexing mechanism for fast north finding and azimuth tracking of a pan-tilt comprises a support frame 1, a central shaft 2, a table body 3 and an indexing mechanism, wherein the central shaft 2 is vertically and fixedly arranged in the support frame 1, the central shaft 2 is a hollow stepped shaft structure with an opening at the lower end, a positioning cavity is formed in the central shaft 2, a positioning ball 5 is elastically arranged in the positioning cavity, the table body 3 is rotatably arranged around the central shaft 2, and the indexing mechanism is arranged in the table body 3 and is used for realizing fast large-angle indexing and fine-adjustment small-angle tracking of the table body 3;

the indexing mechanism comprises a worm wheel 6 sleeved on the central shaft 2 and used for positioning the rotation of the central shaft 2;

the azimuth screw group is fixedly arranged on the inner side wall of the table body 3 and is used for driving the worm wheel 6 to rotate so as to drive the table body 3 to rotate;

and a lock cylinder group for controlling the relative rotation of the worm wheel 6 and the central shaft 2;

a jack 7 is formed in the side wall of the table body 3, the position of the jack 7 corresponds to the position screw group, and a single-axis fiber optic gyroscope 8 is fixedly arranged in the table body 3 and used for sensing the azimuth angle and the component of the sensitive earth rotation angular velocity on the horizontal plane;

and an encoder 9 for tracking the azimuth angle, wherein the encoder 9 is mounted on the table body 3 through a screw, and a first shaft part of the photoelectric encoder 9 is inserted into the top end of the central shaft 2 and fixed through a screw.

In this embodiment, the stage body 3 includes a box 31 and box covers 32 disposed on two sides of the box 31, and the box 31 and the box covers 32 cooperate to form a hollow stage body 3 structure;

the support frame 1 comprises a core sleeve 101 and three thread sleeves 102 which are circumferentially arranged on the periphery of the core sleeve 101, the central shaft 2 is fixedly arranged in the core sleeve 101, an adjusting rod is connected with the thread of each thread sleeve 102 in a screw way when the support frame is installed at the later stage, and the three adjusting rods and the support frame 1 are matched to form a tripod structure to fix the tripod head.

In this embodiment, the bearing 10 is sleeved at the shoulder position of the central shaft 2, the central shaft 2 is in threaded connection with an annular lock nut 11, and the lock nut 11 abuts against the inner ring of the bearing 10, so that the inner ring of the bearing 10 and the central shaft 2 are fixed;

as shown in fig. 3, the stage body 3 is arranged on the outer ring of the bearing 10, the central shaft 2 at the bottom of the stage body 3 is further sleeved with a lower shaft cover 12 and a lower pressing ring 13, the stage body 3, the lower shaft cover 12 and the lower pressing ring 13 are sequentially connected through bolts, the lower shaft cover 12 abuts against the outer ring of the bearing 10, and then the outer ring of the bearing 10 and the stage body 3 are fixed, specifically, the bearing 10 adopts 16003 bearing, which is a deep groove ball bearing under the NSK bearing brand.

In order to ensure the installation tightness of the table body 3 and the central shaft 2, a rubber ring is further arranged between the lower peripheral cover and the lower pressing ring 13, and the rubber ring is sleeved on the central shaft 2.

In the embodiment, the positioning cavities are transversely distributed in the central shaft 2, namely the length direction of the positioning cavities is vertical to the axial direction of the central shaft 2, a pressure spring 14 is arranged in each positioning cavity, and one end of each pressure spring 14 is fixedly connected with a positioning ball 5;

as shown in fig. 4, specifically, the worm wheel 6 includes a wheel portion 61 and a hollow second shaft portion 62 which are integrally formed, the overall cross section of the wheel portion 61 and the second shaft portion 62 is in a shape of a line after being connected, and a slide way 15 with an arc-shaped cross section is arranged on the inner side of the joint of the wheel portion 61 and the second shaft portion 62;

the wheel part 61 is provided with a plurality of circular lightening holes in the circumferential direction.

As shown in fig. 5, four circular positioning holes 16 are circumferentially arranged at 90 ° intervals at the upper end of the second shaft part 62, the positioning ball 5 is arranged in one positioning hole 16, the positioning ball 5 is pushed to sequentially enter the four positioning holes 16 by utilizing the contraction and stretching principle of the pressure spring 14, so that the large-angle rapid transposition of the table body 3 is realized, the table is mainly used for finding north at four positions of the pan-tilt, the table body 3 rotates and stops for one circle to realize the transposition of the four positions which are 90 °, the single-axis fiber gyroscope 8 measures the autorotation related component of the earth in the process, and then the azimuth angle relative to north is calculated.

In this embodiment, position screw group is including linking firmly the position seat 17 of 3 inner walls of stage bodies, rotating worm 18 of being connected and setting up the shaft coupling 19 in worm 18 one end with position seat 17, 18 both ends of worm rotate with position seat 17 through the bearing and connect, and 18 meshes with worm wheel 6, can realize the auto-lock of correlation structure, shaft coupling 19 with 7 positions of jack correspond, and accessible peripheral hardware passes jack 7 and rotates shaft coupling 19 and then rotate worm 18, in order to realize worm wheel 6's rotation and fine setting small angle and trail, and the azimuth after the mainly used seeks north.

As shown in fig. 6, in this embodiment, the lock cylinder group includes a lock cylinder 20 and four locking balls 21 circumferentially arranged on the side wall of the central shaft 2, the lock cylinder 20 is of a hollow cylindrical structure with an open lower end, the lock cylinder 20 is screwed into the central shaft 2, the lower end of the lock cylinder 20 exceeds the central shaft 2, a plurality of retaining sleeves 22 of different structures are further arranged between the lock cylinder 20 and the central shaft 2, and O-rings 23 are arranged between adjacent retaining sleeves 22;

the upper end face and the side face of the lock cylinder 20 are in inclined, chamfered transition to form an extrusion face 4 with a cross section in the shape of a Chinese character ' horizontal ' or vertical '.

Specifically, the locking ball 21 is inserted into the central shaft 2, the locking ball 21 is drum-shaped, two ends of the locking ball 21 are planes, the middle part of the locking ball 21 is a spherical surface, one spherical side of the locking ball 21 is arranged outside the central shaft 2 and is contacted with the slideway 15, and the other spherical side of the locking ball 21 is arranged in the central shaft 2 and is contacted with the extrusion surface 4;

the lock cylinder 20 presses the locking ball 21 by rotating the lock cylinder 20 to control the pressing surface 4 to move upward, so that the rotation of the worm wheel 6 is restricted.

The utility model discloses when concrete operation, install the laser irradiation instrument in the 3 upper ends of stage body in advance, under the initial condition: the locking ball 21 is not extruded by the lock core 20 and is in an unstressed state; the positioning ball 5 is placed in one positioning hole 16 and set as an initial position.

Firstly, carrying out large-angle rapid transposition for carrying out north finding, taking an initial position as a reference, manually rotating the table body 3, then rotating the table body 3 around the central shaft 2, at the moment, rotating the worm wheel 6 along with the table body 3, keeping the central shaft 2 still, in the process, after the positioning ball 5 is subjected to tangential friction, contracting the pressure spring 14, sliding the positioning ball 5 along a rotating circular surface, and automatically falling into one positioning hole 16 after the positioning ball rapidly slides for 90 degrees, thereby completing large-angle rapid positioning at intervals of 90 degrees;

then, the positioning balls 5 sequentially rotate to enable the positioning balls to sequentially fall into the positioning holes 16, so that large-angle four-position rotation can be completed, the encoder 9 measures in the process to determine the rotation precision, the single-axis optical fiber gyroscope 8 measures the earth rotation related components, the azimuth angle relative to north is calculated, and the auxiliary holder is used for completing fast north finding to obtain a north angle.

After seeking north, it shifts up to rotate lock core 20, and then the extrusion face 4 moves up and produces the extrusion to locking ball 21, and then the rotation of restriction worm wheel 6, rotate worm 18 through peripheral hardware instrument, and then the stage body 3 is for worm wheel 6, rotate and then realize the fine setting round center pin 2, rotatory process is steady, after rotatory, utilize the auto-lock principle of worm wheel 6 worm 18 to guarantee that stage body 3 no longer rotates, thereby realize fine setting in the 3 position of stage body, trail and auto-lock.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the present invention, so that equivalent changes or modifications made by the structure, features and principles of the present invention should be included in the claims of the present invention.

Claims (6)

1. The indexing mechanism for the rapid north finding and the azimuth tracking of the pan-tilt is characterized by comprising a support frame (1), a central shaft (2), a table body (3) and an indexing mechanism, wherein the central shaft (2) is vertically and fixedly arranged in the support frame (1), the central shaft (2) is of a hollow stepped shaft structure, a positioning cavity is formed in the central shaft (2), positioning balls (5) are elastically arranged in the positioning cavity, the table body (3) is rotatably arranged around the central shaft (2), and the indexing mechanism is arranged in the table body (3) and used for realizing the rotation of the pan-tilt;

the indexing mechanism comprises a worm wheel (6) sleeved on the central shaft (2) and used for positioning the rotation of the central shaft (2);

the azimuth screw group is fixedly arranged on the inner side wall of the table body (3) and is used for driving the worm wheel (6) to rotate so as to drive the table body (3) to rotate;

and a lock cylinder group for controlling the relative rotation of the worm wheel (6) and the central shaft (2);

a jack (7) is formed in the side wall of the table body (3), the position of the jack (7) corresponds to the position screw group, and a single-axis optical fiber gyroscope (8) is fixedly arranged in the table body (3) and used for sensing an azimuth angle;

and the encoder (9) is used for tracking the azimuth angle, and a first shaft part of the encoder (9) is fixedly connected with the top end of the central shaft (2).

2. An indexing mechanism for a pan/tilt head quick north finding and azimuth tracking according to claim 1, characterized in that the central shaft (2) and the table body (3) are rotationally connected through a bearing (10);

the bearing (10) is sleeved at the shaft shoulder position of the central shaft (2), an annular lock nut (11) is connected to the central shaft (2) in a threaded manner, and the lock nut (11) abuts against the inner ring of the bearing (10) to fix the inner ring of the bearing (10);

the bearing (10) outer ring is arranged in the stage body (3), the lower shaft cover (12) and the lower pressing ring (13) are further sleeved on the central shaft (2) at the bottom of the stage body (3), the lower shaft cover (12) and the lower pressing ring (13) are sequentially connected through bolts, and the lower shaft cover (12) abuts against the bearing (10) outer ring and the fixed bearing (10) outer ring.

3. An indexing mechanism for rapid north finding and azimuth tracking of a pan/tilt head according to claim 1, wherein a pressure spring (14) is disposed in the positioning cavity, and one end of the pressure spring (14) is fixedly connected with the positioning ball (5);

the worm wheel (6) comprises an integrally-formed wheel part (61) and a hollow shaft part II (62), the whole cross section of the wheel part (61) and the shaft part II (62) is in a line shape after being connected, and a slide way (15) with an arc-shaped cross section is arranged on the inner side of the joint of the wheel part (61) and the shaft part II (62);

and four circular positioning holes (16) are formed in the upper end of the second shaft part (62) at intervals of 90 degrees in the circumferential direction, and the positioning ball (5) is arranged in one positioning hole (16).

4. An indexing mechanism for a pan/tilt head to quickly find north and track azimuth according to claim 3, wherein the azimuth screw set comprises an azimuth seat (17) fixed on the inner wall of the table body (3), a worm (18) rotatably connected with the azimuth seat (17), and a coupling (19) arranged at one end of the worm (18), the worm (18) is engaged with the worm wheel (6), and the coupling (19) corresponds to the insertion hole (7).

5. An indexing mechanism for a pan/tilt/zoom quick north finding and azimuth tracking according to claim 3, wherein the lock cylinder group comprises a lock cylinder (20) and four locking balls (21) circumferentially arranged on the side wall of the central shaft (2), the lock cylinder (20) is of a hollow cylinder structure, the lock cylinder (20) is in threaded connection with the central shaft (2), a plurality of retaining sleeves (22) are further arranged between the lock cylinder (20) and the central shaft (2), and O-rings (23) are arranged between adjacent retaining sleeves (22);

the upper end face and the side face of the lock cylinder (20) are in inclined chamfer transition to form a pressing face (4) with a cross section in a horizontal shape.

6. An indexing mechanism for a tripod head to quickly find north and track azimuth according to claim 5, wherein the locking ball (21) is inserted into the central shaft (2), the locking ball (21) is drum-shaped, two ends of the locking ball (21) are planes, the middle part of the locking ball is spherical, one side of the spherical surface of the locking ball (21) is arranged outside the central shaft (2) and is in contact with the slideway (15), and the other side of the spherical surface of the locking ball (21) is arranged in the central shaft (2) and is in contact with the extrusion surface (4).

Images