High-precision turntable unit of side slope monitoring radar

Abstract

The utility model discloses a high-precision rotary table unit of a side slope monitoring radar, which relates to the technical field of miniature single-shaft rotary tables and comprises a rotary table, a rotary support, a crossed roller bearing, a fixed shaft, a conductive slip ring, a bearing end cover, a large transposition gear, a support stud, a dustproof cover, a pressing plate, an angle encoder, a stepping motor and a transposition gear set. The utility model has the characteristics of high positioning accuracy, compact structure, good stability, long service life and the like.

Description

Technical Field

[0001] The utility model relates to a high-precision turntable unit for a slope monitoring radar, and belongs to the field of miniature single-axis turntables. Background Art

[0002] Slope monitoring radars utilize electromagnetic wave detection principles, transmitting electromagnetic waves through radio frequency modules to monitor the internal conditions of slopes. Because slope monitoring radars require high precision and reliability, their turntable units must meet stringent requirements, requiring high rotational accuracy, excellent stability, and a long service life. Currently, existing slope monitoring radars use conventional magnetoelectric encoders for angular positioning, achieving only 0.1° to 0.05° positioning accuracy. This also results in poor speed stability. Furthermore, the turntables lack conductive slip rings, creating a risk of tangling in the wires between the monitoring unit and the control system on the foundation. Utility Model Content

[0003] In order to achieve the above-mentioned purpose, the technical solution adopted by the present utility model is as follows.

[0004] A high-precision turntable unit for a slope monitoring radar, comprising a turntable, a rotating bracket, a cross roller bearing, a fixed shaft, a conductive slip ring, a bearing end cover, a large indexing gear, a support stud, a dust cover, a pressure plate, an angle encoder, a stepping motor, and an indexing gear set;

[0005] The rotating platform is fixedly connected to the radar monitoring unit to drive the radar monitoring unit to rotate;

[0006] The rotating bracket is fixedly connected to the rotating platform, and a cross roller bearing is installed in the middle of the rotating bracket;

[0007] The outer ring of the cross roller bearing is pressed against the rotating bracket through the bearing end cover, and the inner ring of the cross roller bearing is pressed against the indexing gear through the fixed shaft;

[0008] The fixed shaft is located on the central axis, the fixed shaft is fixedly connected to the foundation base of the slope monitoring radar, and a conductive slip ring is provided in the middle of the fixed shaft;

[0009] A rotating gear is installed above the fixed shaft and the cross roller bearing, the rotating gear and the fixed shaft are fixedly connected by screws, a bearing end cover is provided between the rotating gear and the cross roller bearing, and the bearing end cover is connected to the rotating bracket by screws;

[0010] An angle encoder is provided above the indexing gear, a dust cover is installed above the pressure plate through a support stud, a stepper motor is provided on the upper left side of the pressure plate, an indexing gear set is provided at the shaft end of the stepper motor, and the indexing gear set and the indexing gear form a gear pair.

[0011] Furthermore, the rotating bracket is a stepped cylindrical structure.

[0012] Furthermore, the fixed shaft is a short through shaft.

[0013] Furthermore, the encoder includes a stator and a rotor, the rotor is connected to the indexing gear by screws, and the stator is connected to the pressure plate by screws.

[0014] Furthermore, a gasket is provided between the outer ring of the pressure plate and the outer ring of the rotating platform, and the installation spacing of the angle encoder is determined by adjusting the thickness of the gasket.

[0015] Furthermore, the indexing gear set includes a gear shaft, a compression spring and a small gear. The gear shaft and the small gear are processed as one piece and then cut off. The number of teeth and module are completely consistent. By adjusting the compression amount of the compression spring, the zero gap between the indexing gear set and the indexing gear is controlled to achieve high transmission precision.

[0016] Furthermore, the conductive slip ring is a 24-way electric slip ring, and the 24 leads at the bottom of the conductive slip ring are directly connected to the wires of the internal control system of the foundation base of the slope monitoring radar, and the 24 leads at the upper end of the conductive slip ring are respectively connected to the optical terminal and radar in the radar monitoring unit of the slope monitoring radar to realize signal transmission.

[0017] Compared with the prior art, the beneficial effects of the present invention are: (1) high positioning accuracy: the present invention adopts a high-precision angle encoder and an indexing gear set, so that the transmission accuracy is high, the forward and reverse rotation positioning accuracy of the slope radar is high, and the relative cost is not increased; (2) compact structure: the present invention adopts a gear set transmission, which has a simple structure and is easy to manufacture and process. The support adopts a cross roller bearing, which has a large load-bearing capacity and reduces the axial size at the same time, making the overall size of the slope radar compact; (3) long service life: the indexing gear set is used as the anti-backlash gear set, and the compression spring is installed with a large preload force, so that the indexing gear can achieve long-term anti-backlash. At the same time, a long-life conductive slip ring is used, so that the slope radar can achieve long-term low-speed rotation; (4) the turntable unit of the present invention has high positioning accuracy, compact structure, good stability and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic cross-sectional view of the structure of the present invention.

[0019] In the figure, 1-rotating table; 2-rotating bracket; 3-cross roller bearing; 4-fixed shaft; 5-conductive slip ring; 6-bearing end cover; 7-indexing gear; 8-support stud; 9-dust cover; 10-pressure plate; 11-angle encoder; 111-stator; 112-rotor; 12-stepping motor; 13-indexing gear set; 131-gear shaft; 132-compression spring; 133-small gear; 14-gasket. DETAILED DESCRIPTION

[0020] The present invention will be described in further detail below with reference to the embodiments and accompanying drawings.

[0021] like Figure 1 The high-precision turntable unit of a slope monitoring radar shown in the figure includes a rotating table 1, a rotating bracket 2, a cross roller bearing 3, a fixed shaft 4, a conductive slip ring 5, a bearing end cover 6, a large indexing gear 7, a support stud 8, a dust cover 9, a pressure plate 10, an angle encoder 11, a stepping motor 12, a indexing gear set 13 and a gasket 14; wherein the rotating table 1 is fixedly connected to the radar monitoring unit to drive the radar monitoring unit to rotate, the rotating bracket 2 is a stepped cylindrical structural member, a cross roller bearing 3 is installed in the middle, and is fixedly connected to the rotating table 1, the outer ring of the cross roller bearing 3 is pressed against the rotating bracket 2 through the bearing end cover 6, and the inner ring is pressed against the large indexing gear 7 through the fixed shaft 4; the fixed shaft 4 is a short shaft with a through hole, located on the central axis, and a conductive slip ring 5 is provided in the middle of the fixed shaft 4; the fixed shaft 4 is installed above the cross roller bearing 3 There is an indexing gear 7, which is fixed to the fixed shaft 4 by screws, and a bearing end cover 6 is provided between it and the cross roller bearing 3, and the bearing end cover 6 is connected to the rotating bracket 2 by screws; an angle encoder 11 is provided above the indexing gear 7, and the encoder is divided into a stator 111 and a rotor 112, and the rotor 112 is connected to the indexing gear 7 by screws, and the stator 111 is connected to the pressure plate 10 by screws, and a gasket 14 is provided between the outer ring of the pressure plate 10 and the outer ring of the rotary table 1, and the installation spacing of the angle encoder 11 is determined by adjusting the thickness of the gasket 14, and a dust cover 9 is installed above the pressure plate 10 through the support stud 8, and a stepping motor 12 is provided on the upper left of the pressure plate 10, and an indexing gear group 13 is provided at the shaft end of the stepping motor 12, and the indexing gear group 13 forms a gear pair with the indexing gear 6. The indexing gear set 13 consists of a gear shaft 131, a compression spring 132, and a pinion 133. Gear shaft 131 and pinion 133 are formed by integrally machining gears and then cutting them apart. Their number of teeth, module, and other parameters are identical. Adjusting the compression of compression spring 132 controls the gap between the indexing gear set 13 and the indexing gear 6 to achieve zero clearance, thus achieving high-precision transmission. The conductive slip ring 5 is a 24-way electrical slip ring, a specially designed low-speed, long-life slip ring with a rotational lifespan of up to 30 million revolutions. The 24 leads at the bottom of the conductive slip ring 5 are directly connected to the control system wires within the foundation of the slope monitoring radar. The 24 leads at the top of the conductive slip ring 5 are connected to the optical transceiver and radar in the radar monitoring unit of the slope monitoring radar, respectively, to achieve signal transmission. The fixed shaft 4 is fixedly connected to the foundation base of the slope monitoring radar. The control system controls the rotation of the stepper motor 12, thereby driving the indexing gear set 13 to perform circular motion around the indexing gear 7 and the fixed shaft 4, thereby realizing the rotation function of the radar monitoring unit at the upper end of the slope monitoring radar.

[0022] A turntable control circuit is installed between the pressure plate 10 and the dust cover 9. Conductors within the foundation base transmit electrical signals to the monitoring unit via a conductive slip ring 5. The monitoring unit then transmits voltage and control signals to the turntable control circuit. The turntable control circuit drives the stepper motor 12 via the received control signal, and the motor shaft drives the indexing gear set 13 to rotate. Because the indexing gear 7 is fixed to the foundation base, the indexing gear set 13 can only rotate around the indexing gear 7, while simultaneously transmitting force to the pressure plate 10 and the turntable 1. The turntable 1 drives the monitoring unit, which is fixed to the turntable 1, to rotate around the fixed axis 4, thus achieving continuous scanning, self-testing, and zeroing functions of the slope monitoring radar. The utility model uses a high-precision time-grid angle encoder with a positioning accuracy of 0.008°. The stepping angle of the stepper motor is controlled by the real-time angle data of the angle encoder, achieving high-precision and stable control.

Claims

1. A high-precision turntable unit for slope monitoring radar, characterized by: It includes a rotating table (1), a rotating bracket (2), a cross roller bearing (3), a fixed shaft (4), a conductive slip ring (5), a bearing end cover (6), a large indexing gear (7), a support stud (8), a dust cover (9), a pressure plate (10), an angle encoder (11), a stepping motor (12) and an indexing gear set (13); The rotating platform (1) is fixedly connected to the radar monitoring unit to drive the radar monitoring unit to rotate; The rotating bracket (2) is fixedly connected to the rotating platform (1), and a cross roller bearing (3) is installed in the middle of the rotating bracket (2); The outer ring of the cross roller bearing (3) is pressed against the rotating bracket (2) through the bearing end cover (6), and the inner ring of the cross roller bearing (3) is pressed against the indexing gear (7) through the fixed shaft (4); The fixed shaft (4) is located on the central axis, the fixed shaft (4) is fixedly connected to the foundation base of the slope monitoring radar, and a conductive slip ring (5) is provided in the middle of the fixed shaft (4); A large indexing gear (7) is installed above the fixed shaft (4) and the cross roller bearing (3), the large indexing gear (7) and the fixed shaft (4) are fixedly connected by screws, a bearing end cover (6) is provided between the large indexing gear (7) and the cross roller bearing (3), and the bearing end cover (6) is connected to the rotating bracket (2) by screws; An angle encoder (11) is provided above the indexing gear (7), a dust cover (9) is installed above the pressure plate (10) through a support stud (8), a stepping motor (12) is provided on the upper left of the pressure plate (10), and an indexing gear set (13) is provided at the shaft end of the stepping motor (12), and the indexing gear set (13) and the indexing gear (6) form a gear pair.

2. The high-precision turntable unit for slope monitoring radar according to claim 1, characterized in that: The rotating bracket (2) is a stepped cylindrical structural member.

3. The high-precision turntable unit for slope monitoring radar according to claim 1, characterized in that: The fixed shaft (4) is a short, through shaft.

4. The high-precision turntable unit for slope monitoring radar according to claim 1, characterized in that: The encoder (11) comprises a stator (111) and a rotor (112), wherein the rotor (112) is connected to the indexing gear (7) via screws, and the stator (111) is connected to the pressure plate (10) via screws.

5. The high-precision turntable unit for slope monitoring radar according to claim 1, characterized in that: A gasket (14) is provided between the outer ring of the pressing plate (10) and the outer ring of the rotating platform (1), and the installation spacing of the angle encoder (11) is determined by adjusting the thickness of the gasket (14).

6. The high-precision turntable unit for slope monitoring radar according to claim 1, characterized in that: The indexing gear set (13) comprises a gear shaft (131), a compression spring (132) and a small gear (133). The gear shaft (131) and the small gear (133) are formed by being integrally processed and then cut off. The number of teeth and the module thereof are completely consistent. By adjusting the compression amount of the compression spring (132), the zero gap between the indexing gear set (13) and the indexing gear (7) is controlled, thereby achieving high transmission precision.

7. The high-precision turntable unit for slope monitoring radar according to claim 1, characterized in that: The conductive slip ring (5) is a 24-way electric slip ring. The 24-way leads at the bottom of the conductive slip ring (5) are directly connected to the wires of the internal control system of the foundation base of the slope monitoring radar. The 24-way leads at the upper end of the conductive slip ring (5) are respectively connected to the optical terminal and the radar in the radar monitoring unit of the slope monitoring radar to realize signal transmission.

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