CN105371817B - Limit damper for limiting electro-optic theodolite rotary axis system continuous rotary - Google Patents

Abstract

A limit buffer device for limiting the continuous rotation of the rotary shaft system of a photoelectric theodolite relates to the field of the photoelectric theodolite, which limits the continuous rotation of the rotary shaft system and elastically buffers the impact when the machine stops. The invention includes a buffer seat, two side baffles, two sliding rods, a limit slider, four compression springs, four adjustment nuts, two stopper rubber caps, two front baffles, two stoppers Electric limit switch, electric limit switch blank and limit stop arm. The electric limit switch stopper is at the position of 1°～3° before the limit stop arm collides with the two stopper rubber caps on the limit slider, and the electric limit switch stopper triggers the two stopper electric limiters switch, and then control the drive motor of the photoelectric theodolite rotary shaft to cut off the power in time, and stop the torque output. The invention can prevent the entanglement of the connecting cables without adding a conductive slip ring, and avoids the problem of damage caused by hard collision of the rotary shaft system when encountering a mechanical stop.

Description

A limit buffer device for limiting the continuous rotation of the rotary shaft system of the photoelectric theodolite

technical field

The invention relates to the technical field of photoelectric theodolite, in particular to a position-limiting buffer device for limiting the continuous rotation of the rotary shaft system of the photoelectric theodolite.

Background technique

Large-scale photoelectric theodolite is used for tracking and measuring space targets such as aircraft, rockets, and artificial satellites. Compared with radar, etc., it has the characteristics of high measurement accuracy and real-time imaging, and is widely used in aerospace and other fields.

The rotary shaft system is an important part of the photoelectric theodolite, which is used to drive the optical system to complete functions such as tracking and capturing. At present, on the theodolite whose vertical axis system needs to rotate continuously, a set of conductive slip rings is usually used to realize the electrical connection between the horizontal axis system and the vertical axis system, so as to ensure that the connection cables between the horizontal axis system and the vertical axis system of the photoelectric theodolite are in the rotation axis system. Winding does not occur during continuous rotation. In the photoelectric theodolite whose rotary axis system does not need continuous rotation, a set of conductive slip rings is also installed, which will not only increase the manufacturing cost of the equipment, but also reduce the operational reliability of the photoelectric theodolite. If only a simple mechanical stop is used to limit the continuous rotation of the theodolite rotary shaft system, thereby preventing the winding of the connecting cables on the shaft and under the shaft, but the large impact force during the stop process is likely to cause damage to the equipment.

Therefore, how to realize limit buffering for the continuous rotation of the rotary shaft system of the photoelectric theodolite and prevent the equipment from being damaged due to the hard collision of the mechanical limit is particularly urgent.

Contents of the invention

In order to limit the continuous rotation of the rotary shaft system of the photoelectric theodolite and avoid the equipment damage caused by the hard collision when the rotary shaft system encounters a mechanical stop, the present invention provides a position limiter for limiting the continuous rotation of the rotary shaft system of the photoelectric theodolite The buffer device prevents the connecting cable from being entangled without installing a conductive slip ring.

The technical scheme that the present invention adopts for solving technical problems is as follows:

The limit buffer device for limiting the continuous rotation of the photoelectric theodolite rotary shaft system of the present invention comprises: a buffer seat fixed on the photoelectric theodolite base;

a first slide bar and a second slide bar fixed on the buffer seat and parallel to each other;

A limit slider set on the first slide bar and the second slide bar, the limit slide block slides freely along the length direction of the first slide bar and the second slide bar;

The first compression spring and the third compression spring are set on the first slide bar and located on the left and right sides of the limit slider;

The second compression spring and the fourth compression spring are set on the second slide bar and are located on the left and right sides of the limit slider. The structure of the first compression spring, the second compression spring, the third compression spring and the fourth compression spring are the same size and have the same stiffness coefficient;

The counterclockwise stopper rubber cap and the clockwise stopper rubber cap respectively fixed on the left and right sides of the limit slider;

The counterclockwise stop electric limit switch and the clockwise stop electric limit switch fixed on the front end of the buffer seat and symmetrically arranged around the center line of the limit slider are used to control the on-off of the drive motor of the photoelectric theodolite rotary shaft system ;

The limit stop arm fixedly connected with the rotary shaft of the photoelectric theodolite, the limit stop arm and the counterclockwise stop rubber cap and the clockwise stop rubber cap are all located in the same plane;

The electric limit switch blank fixed on the limit stop arm is used to trigger the counterclockwise stop electric limit switch and the clockwise stop electric limit switch.

Further, it also includes four adjustment nuts, two of which are installed at the left and right ends of the first slide bar for adjusting the preload of the first compression spring and the third compression spring, and the remaining two adjustment nuts are installed at the left and right ends of the first slide bar. The left and right ends of the two sliding rods are used to adjust the pre-tightening force of the second compression spring and the fourth compression spring; by adjusting the pre-tightening force of the four compression springs, the limit slider is placed between the first sliding rod and the second The middle part of the second slider.

Further, it also includes two front baffles fixed on the front end of the buffer seat; the counterclockwise stopper electric limit switch and the clockwise stopper electric limit switch are symmetrically installed in it with the center line of the limit slider as the axis a front fender.

Further, it also includes two side baffles, and the two side baffles are respectively fixed on the two sides of the buffer seat to increase the structural rigidity of the buffer seat.

Further, when the rotary shaft of the photoelectric theodolite rotates clockwise, the electric limit switch flap triggers the clockwise stop at the position of 1°-3° before the limit stop arm collides with the clockwise stop rubber cap. Electric limit switch; when the rotary shaft of the photoelectric theodolite rotates counterclockwise, the electric limit switch stopper is at the position of 1° to 3° before the limit stop arm collides with the counterclockwise stop rubber cap, triggering Counterclockwise stop electric limit switch.

Further, the two ends of the buffer seat are arranged in a U-shaped structure, and the U-shaped structure is provided with a slide bar installation hole, a front baffle installation hole and a side baffle installation hole; the bottom end of the buffer seat is arranged as a raised structure, the bumper structure is provided with a buffer seat installation hole.

Further, the structural dimensions of the first sliding rod and the second sliding rod are the same, both ends are provided with threads, and the middle part is a polished rod.

Further, the upper and lower ends of the limit slider are respectively provided with a guide hole, and the limit slider is respectively connected with the first slide bar and the second slide bar through these two guide holes.

Further, the left and right sides of the limit slider are respectively provided with a limit column, the counterclockwise stop rubber cap is fixed on the left limit column, and the clockwise stop rubber cap is fixed on the right side On the limit post, the counterclockwise stopper rubber cap and the clockwise stopper rubber cap are used to elastically buffer the stop impact of the rotary shaft of the photoelectric theodolite.

The beneficial effects of the present invention are:

1. The present invention uses a two-way sliding limit slider to limit the continuous rotation of the photoelectric theodolite rotary shaft system, and simultaneously uses four compression springs with the same structural size and stiffness coefficient to elastically position the limit slider. Through the combined action of the limit slider and four compression springs, the blocking and elastic buffering of the limit stop arm is realized, and finally the functions of limiting the continuous rotation of the rotary shaft system of the photoelectric theodolite and performing secondary elastic buffering on the stop of the rotary shaft system are realized. , to avoid the occurrence of damage caused by hard collision when the rotary shaft system of the photoelectric theodolite encounters a mechanical stop.

2. In the present invention, the clockwise stopper rubber cap and the counterclockwise stopper rubber cap are arranged on the left and right sides of the limit slider to elastically buffer the impact force when the limit stop arm collides with the limit slider , and reduce the working noise.

3. In the present invention, at the position 1°-3° before the collision between the limit stop arm and the clockwise stop rubber cap (counterclockwise stop rubber cap) on the limit slider, the electric limit switch stopper Trigger the clockwise stop electric limit switch (counterclockwise stop electric limit switch), and then control the drive motor of the photoelectric theodolite rotary shaft to cut off the power in time, stop the torque output, and reduce the impact of the rotary shaft on the limit buffer device force, and reliably ensure the normal operation of the limit buffer device.

4. The position-limiting buffer device of the present invention has a simple structure, is easy to implement, and is safe and reliable. It not only limits the continuous rotation of the rotary shaft system of the photoelectric theodolite, but also has an elastic buffer function for the stop of the rotary shaft.

5. In the present invention, due to the small size of the limit slider and the limited rotation angle occupied, it is possible to realize the reciprocating rotation of the photoelectric theodolite rotary axis within the range of approximately -180° to +180°.

Description of drawings

Fig. 1 is a three-dimensional structure schematic diagram of the limit buffer device for limiting the continuous rotation of the rotary shaft system of the photoelectric theodolite according to the present invention.

Fig. 2 is a front view of the limit buffer device for limiting the continuous rotation of the rotary shaft system of the photoelectric theodolite according to the present invention.

Fig. 3 is a schematic diagram of the position connection relationship between the position-limiting buffer device and the photoelectric theodolite after installation of the present invention.

Fig. 4 is a structural schematic diagram of the buffer seat.

Fig. 5 is a structural schematic diagram of a limit slider.

Fig. 6 is a schematic diagram of the structure of the electric limit switch shutter.

In the figure: 1. Buffer seat, 1a, Buffer seat installation hole, 1b, Slide bar installation hole, 1c, Front baffle installation hole, 1d, Side baffle installation hole, 2, Side baffle, 3, Fastening Screw, 4. Adjusting nut, 5. The first compression spring, 6. The first sliding rod, 7. The second compression spring, 8. Counterclockwise stopper rubber cap, 9. The second sliding rod, 10. Limit slider , 10a, guide hole, 10b, limit post, 11, third compression spring, 12, clockwise stop electric limit switch, 13, clockwise stop rubber cap, 14, front baffle, 15, fourth compression Spring, 16, rotary shaft, 17, photoelectric theodolite base, 18, electric limit switch catch, 19, counterclockwise stop electric limit switch, 20, limit stop arm.

detailed description

As shown in Figures 1 and 2, the limit buffer device for limiting the continuous rotation of the vertical axis of the photoelectric theodolite of the present invention includes a buffer seat 1, two side baffles 2, two slide bars, and a limit slider 10. Four compression springs, four adjusting nuts 4, four fastening screws 3, two stopper rubber caps, two front baffles 14, two stopper electric limit switches, electric limit switch baffles 18 And limit stop arm 20.

In order to see the internal structure of the limit buffer device, the left part of the upper and lower front baffles 14 and the counterclockwise stop electric limit switch 19 installed on the lower front baffle 14 are omitted in Fig. 1 and Fig. 2 .

The rotary shaft 16 mentioned in the present invention, the photoelectric theodolite base 17, the drive motor of the photoelectric theodolite rotary shaft system all belong to the component part of the photoelectric theodolite, no longer describe here.

The structure of the buffer seat 1 is shown in Figure 4. The buffer seat 1 has a certain radian as a whole, and the two ends of the buffer seat 1 are arranged in a U-shaped structure. The hole 1c, the mounting hole 1d of the side baffle, and the bottom end of the buffer seat 1 are arranged as a raised structure, and the raised structure is provided with a buffer seat installing hole 1a.

The two side baffles 2 are respectively fixed on both sides of the U-shaped structure of the buffer pedestal 1 through the side baffle mounting holes 1 d on the buffer pedestal 1 to increase the structural rigidity of the buffer pedestal 1 .

The two slide bars are respectively the first slide bar 6 and the second slide bar 9, the first slide bar 6 and the second slide bar 9 have the same structural size, about 1/3 of the length of both ends is provided with threads, and the rest of the middle part is bare rod.

The structure of the limit slider 10 is shown in Figure 5, the upper and lower ends of the limit slider 10 are respectively provided with a guide hole 10a, the left and right sides of the limit slider 10 are respectively provided with a limit post 10b, and the limit slider 10 passes through The two guide holes 10a are respectively connected with the first slide bar 6 and the second slide bar 9. After the connection is completed, the limit slider 10 can slide freely along the length direction of the first slide bar 6 and the second slide bar 9 .

The four compression springs are respectively the first compression spring 5, the second compression spring 7, the third compression spring 11 and the fourth compression spring 15, the first compression spring 5, the second compression spring 7, the third compression spring 11 and the fourth compression spring The structural dimensions of the compression springs 15 are the same and have the same stiffness coefficient.

The first compression spring 5 and the third compression spring 11 pass through the first slide bar 6, the second compression spring 7 and the fourth compression spring 15 pass through the second slide bar 9, and the first compression spring 5 and the second compression spring 7 Located on the left side of the limiting slider 10 , the third compression spring 11 and the fourth compression spring 15 are located on the right side of the limiting slider 10 .

Four adjustment nuts 4 are respectively connected to the two ends of the first slide bar 6 and the second slide bar 9 through threads, that is, an adjustment nut 4 is respectively installed at both ends of the first slide bar 6, and an adjustment nut 4 is respectively installed at the two ends of the second slide bar 9. Adjusting nut 4, adjusting nut 4 is used for adjusting the preload of four compression springs.

After installing the first slide bar 6, the second slide bar 9, the limit slider 10, the four compression springs and the four adjustment nuts 4, install the two ends of the first slide bar 6 through a fastening screw 3 respectively In the sliding rod installation hole 1b on the buffer seat 1, similarly, install the two ends of the second sliding rod 9 in the sliding rod installation hole 1b on the buffer seat 1 through a fastening screw 3, and the installation is completed. After that, the first slide bar 6 and the second slide bar 9 are parallel to each other.

After completing the connection of the two slide bars together with the limit slider 10, the four compression springs and the four adjustment nuts 4 to the buffer seat 1, the preload of the four compression springs is adjusted by adjusting the four adjustment nuts 4 to ensure The four compression springs all have a compression amount of 0-1 mm, and at this time, the limit slider 10 is placed in the middle of the first slide bar 6 and the second slide bar 9 under the elastic force of the four compression springs, and When the limit slider 10 is subjected to an external impact and wants to slide left and right, it is necessary to overcome two compression springs (i.e. the second compression spring 7 and the first compression spring 5 on the left side and the first compression spring 5 on the right side) of the limit slider 10. The elastic force of the fourth compression spring 15 and the third compression spring 11).

The two stopper rubber caps are respectively a clockwise stopper rubber cap 13 and an anticlockwise stopper rubber cap 8, and the clockwise stopper rubber cap 13 and the counterclockwise stopper rubber cap 8 are respectively fixed on the two ends of the limit slider 10. On the first limit post 10b, that is, the counterclockwise stop rubber cap 8 is fixed on the left limit post 10b, and the clockwise stop rubber cap 13 is fixed on the right limit post 10b, and the two stop rubber caps It is used to elastically buffer the stop impact of the rotary shaft 16 of the photoelectric theodolite, and reduce the impact noise at the same time.

Two front baffles 14 are respectively fixed on the front end of the U-shaped structure of the buffer seat 1 through the front baffle mounting holes 1c on the buffer seat 1, which not only increases the structural rigidity of the buffer seat 1, but also serves as a barrier for the two stoppers. Limit switches provide a mounting surface.

The two stop electric limit switches are respectively clockwise stop electric limit switch 12 and counterclockwise stop electric limit switch 19, and clockwise stop electric limit switch 12 and counterclockwise stop electric limit switch 19 are both It is fixed on the front baffle plate 14 below, and is symmetrically arranged with the center line of the limit slider 10 as the axis. The clockwise stop electric limit switch 12 and the counterclockwise stop electric limit switch 19 are used to control the photoelectric theodolite On-off of the drive motor of the rotary shaft system.

As shown in Figure 3, the buffer seat 1 is fixed on the photoelectric theodolite base 17 together with the components installed on it through the raised structure at the bottom end of the buffer seat 1 and the buffer seat installation hole 1a, and the buffer seat 1 is integrally equipped with A certain radian can be well matched with the base 17 of the photoelectric theodolite. One end of the limit stop arm 20 is fixedly connected with the rotary shaft 16 of the photoelectric theodolite, and after the connection is completed, the limit stop arm 20 and the clockwise stop rubber cap 13 and the counterclockwise stop rubber cap 8 are located in the same plane, and then realize the blocking and buffering of the limit buffer device to the limit stop arm 20, so as to indirectly complete the limit and buffer of the rotary shaft 16 of the photoelectric theodolite.

The structure of the electric limit switch blocking plate 18 is shown in FIG. 6 , the electric limit switch blocking plate 18 is generally Z-shaped, and one end is provided with a mounting hole. As shown in Figure 3, the electrical limit switch catch 18 is fixedly connected to the end of the limit stop arm 20 away from the rotary shaft 16 of the photoelectric theodolite, and clockwise on the limit stop arm 20 and the limit slider 10 The stopper rubber cap 13 or the anticlockwise stopper rubber cap 8 are at the position 1° to 3° before the collision, and the electric limit switch stopper 18 triggers the clockwise stopper electric limit switch 12 or the counterclockwise stopper electric limit switch 19, and then control the drive motor of the photoelectric theodolite rotary shaft to cut off the power in time, and stop the torque output.

3 is explained with reference to Fig. 3, when the rotary shaft 16 of photoelectric theodolite rotates clockwise, at the position of 1°～3° before the limit stop arm 20 collides with the clockwise stop rubber cap 13, on the limit stop arm 20 The electric limit switch catch 18 triggers the clockwise stop electric limit switch 12 (referring to when the angle between the limit stop arm 20 and the clockwise stop rubber cap 13 is about 1°～3°, The position of the limit switch stopper 18 just triggers the clockwise stop electric limit switch 12), and then controls the driving motor of the rotary shaft system to stop the torque output after power failure; then, the rotary shaft 16 continues to drive the limit stop under the action of inertia. The stop arm 20 rotates clockwise until the limit stop arm 20 collides with the clockwise stop rubber cap 13, and pushes the limit slider 10 to slide to the left, compressing the first compression spring 5 and the second compression spring 7 to generate more Large amount of deformation until the rotary shaft 16 stops rotating; at this time, the limit buffer device has completed the limit and stop buffer to the clockwise rotation of the photoelectric theodolite rotary shaft system.

Referring to Fig. 3 to illustrate, when the rotary shaft 16 of the photoelectric theodolite rotates counterclockwise, at the position of 1°～3° before the limit stop arm 20 collides with the counterclockwise stop rubber cap 8, the limit stop arm 20 The electric limit switch catch 18 triggers the counterclockwise stop electric limit switch 19 (referring to when the angle between the limit stop arm 20 and the counterclockwise stop rubber cap 8 is about 1° to 3°, The position of the limit switch stopper 18 just triggers the counterclockwise stop electric limit switch 19), and then controls the driving motor of the rotary shaft system to stop the torque output after power failure; then, the rotary shaft 16 continues to drive the limit stop under the action of inertia. The stop arm 20 rotates counterclockwise until the limit stop arm 20 collides with the counterclockwise stop rubber cap 8, and pushes the limit slider 10 to slide to the right, compressing the third compression spring 11 and the fourth compression spring 15 to generate more Large amount of deformation, until the rotary shaft 16 stops rotating; at this time, the limit buffer device has completed the limit and stop buffer to the counterclockwise rotation of the photoelectric theodolite rotary shaft system.

Claims (9)

1. The limit buffer device for limiting the continuous rotation of the photoelectric theodolite rotary shaft is characterized in that, comprising: a buffer seat (1) fixed on the photoelectric theodolite base (17); A first slide bar (6) and a second slide bar (9) fixed on the buffer seat (1) and parallel to each other; The limit slide block (10) that is sleeved on the first slide bar (6) and the second slide bar (9), the limit slide block (10) is along the first slide bar (6) and the second slide bar ( 9) Sliding freely in the length direction; The first compression spring (5) and the third compression spring (11) are set on the first slide bar (6) and located on the left and right sides of the limit slider (10); The second compression spring (7) and the fourth compression spring (15) which are set on the second sliding rod (9) and are located on the left and right sides of the limit slider (10), the first compression spring (5), the first The structural dimensions of the second compression spring (7), the third compression spring (11) and the fourth compression spring (15) are identical and have the same stiffness coefficient; The counterclockwise stopper rubber cap (8) and the clockwise stopper rubber cap (13) respectively fixed on the left and right sides of the limit slider (10); The counterclockwise stop electric limit switch (19) and the clockwise stop electric limit switch (12) fixed on the front end of the buffer seat (1) and symmetrically arranged around the center line of the limit slider (10) are used Used to control the on-off of the drive motor of the photoelectric theodolite rotary shaft (16); The limit stop arm (20) that is fixedly connected with the rotary shaft (16) of the photoelectric theodolite, the limit stop arm (20) and the counterclockwise stop rubber cap (8) and the clockwise stop rubber cap (13) are located in the same plane; The electric limit switch blank (18) fixed on the limit stop arm (20) is used to trigger the counterclockwise stop electric limit switch (19) and the clockwise stop electric limit switch (12). 2. The position-limiting buffer device according to claim 1, characterized in that it also includes four adjusting nuts (4), wherein two adjusting nuts (4) are installed on the left and right ends of the first slide bar (6) for To adjust the pre-tightening force of the first compression spring (5) and the third compression spring (11), the remaining two adjustment nuts (4) are installed at the left and right ends of the second slide bar (9) for adjusting the second compression spring (7) and the pre-tightening force of the fourth compression spring (15); by adjusting the pre-tightening force of the four compression springs, the limit slider (10) is placed in the first slide bar (6) and the second slide Rod (9) middle part. 3. The limit buffer device according to claim 1, characterized in that, it also includes two front baffles (14) fixed on the front end of the buffer seat (1); the counterclockwise stop electric limit switch ( 19) and the clockwise stop electric limit switch (12) are installed on one of the front baffle plates (14) symmetrically about the axis with the limit slide block (10) center line. 4. The position-limiting buffer device according to claim 1, characterized in that it further comprises two side baffles (2), and the two side baffles (2) are respectively fixed on the two sides of the buffer seat (1) , used to increase the structural rigidity of the buffer seat (1). 5. The position-limiting buffer device according to claim 1, characterized in that, when the rotary shaft (16) of the photoelectric theodolite rotated clockwise, the electric limit switch catch (18) stopped at the limit stop arm ( 20) At the position of 1° to 3° before the clockwise stop rubber cap (13) collides, the clockwise stop electric limit switch (12) is triggered; when the rotary shaft (16) of the photoelectric theodolite rotates counterclockwise, The electric limit switch stopper (18) triggers the counterclockwise stop electric limit switch at a position 1° to 3° before the limit stop arm (20) collides with the counterclockwise stop rubber cap (8). (19). 6. The position-limiting buffer device according to claim 1, characterized in that, the two ends of the buffer seat (1) are arranged in a U-shaped structure, and the U-shaped structure is provided with a sliding rod installation hole (1b), a front stop Plate mounting holes (1c) and side baffle mounting holes (1d); the bottom end of the buffer seat (1) is provided with a protruding structure, and the protruding structure is provided with a buffer seat mounting hole (1a). 7. The limit buffer device according to claim 1, characterized in that, the structural dimensions of the first slide bar (6) and the second slide bar (9) are the same, both ends are provided with threads, and the middle part is bare rod. 8. The limit buffer device according to claim 1, characterized in that a guide hole (10a) is respectively provided at both ends of the limit slider (10), and the limit slider (10) passes through the two ends The two guide holes (10a) are respectively connected with the first slide bar (6) and the second slide bar (9). 9. The limit buffer device according to claim 1, characterized in that a limit column (10b) is provided on the left and right sides of the limit slider (10), and the counterclockwise stop rubber cap (8 ) is fixed on the limit post (10b) on the left side, the clockwise stopper rubber cap (13) is fixed on the right side stopper post (10b), the counterclockwise stopper rubber cap (8) and clockwise The hour hand stopper rubber cap (13) is used to carry out an elastic buffer to the stopping impact of the rotary shaft (16) of the photoelectric theodolite.