Axial compact fixing structure of radar turntable output shaft encoder

Abstract

The utility model discloses an axial compact fixing structure of a radar turntable output shaft encoder, and relates to the technical field of radar turntables. The structure comprises a main shaft and a connecting shaft which are coaxially arranged, the main shaft is fixed to the center position through a slewing bearing, and a support and the main shaft are coaxially positioned through a mounting plate; the collector ring and the encoder are coaxially mounted through the main shaft and the mounting plate respectively; the connecting shaft is in driving connection with the encoder through an elastic coupling, penetrates through the center of the collector ring and then is fastened with the driven ring through a set screw; the support is provided with a rotation stopping column, and the rotation stopping column is embedded into the collector ring rotor to form an anti-rotation structure. The utility model has the innovation points that the axial integration of the encoder transmission mechanism is realized through the hollow structure of the collector ring, the elastic coupling is utilized to compensate the installation error so as to prolong the service life of the encoder, the positioning accuracy of the turntable is ensured, the axial height size of the turntable is effectively reduced, and the cost is reduced. The technical problem that a traditional structure occupies too large space is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to radar rotary table technical field, concretely relates to a kind of axial compact type fixing structure of radar rotary table shaft encoder. BACKGROUND

[0002] The conventional radar rotary table encoder mounting structure generally has the problem of excessive axial size, the main reason is that the encoder transmission mechanism and the busbar assembly are arranged in parallel. In the prior art, the commonly used split mounting structure causes the height of the rotary table to increase by about 40%, and the rigid coupling is prone to damage the encoder due to assembly errors. In addition, the busbar rotor is prone to circumferential deviation when rotating at high speed, affecting the angle detection accuracy. Therefore, there is an urgent need to develop a compact encoder fixing structure that can realize axial integration, error compensation and anti-rotation positioning. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a radar rotary table encoder fixing structure with compact axial size and error compensation capability.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0005] An axial compact type fixing structure of a radar rotary table shaft encoder, characterized by comprising:

[0006] A main shaft and a connecting shaft are coaxially arranged, and the main shaft is positioned at the center of the structure through a rotary support;

[0007] The bracket is coaxially positioned with the main shaft through a mounting plate, and the mounting plate is provided with an annular positioning step;

[0008] The busbar and the encoder are coaxially installed through the main shaft flange and the bracket respectively;

[0009] The elastic coupling connects the encoder shaft and one end of the connecting shaft, and the connecting shaft passes through the center hole of the busbar and is fastened with the driven ring through a locking screw;

[0010] The anti-rotation assembly includes a stop column on the bracket and a positioning groove on the busbar rotor, and the gap fit amount of the stop column embedded in the positioning groove is 0.1-0.2mm.

[0011] Advantages of the utility model:

[0012] Axial integration design: the hollow structure of the busbar realizes the axial nesting of the encoder transmission mechanism, which reduces the axial height by more than 30% compared with the traditional side placement scheme;

[0013] Error compensation mechanism: the elastic coupling can absorb radial deviation of ±0.3mm and angular deviation of ±1°, reducing the encoder failure rate by 60%. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a sectional view of the utility model.

[0015] Figure 2 It is a collector ring anti-rotation structure schematic diagram (not containing base) of the utility model.

[0016] Reference signs: 1-base, 2-slewing bearing, 201-slewing bearing outer ring, 202-slewing bearing inner ring, 3-torque motor, 301-torque motor stator, 302-torque motor rotor, 4-main shaft, 5-collector ring, 501-collector ring rotor, 502-collector ring stator, 6-encoder, 7-bracket, 8-connecting shaft, 9-follower ring, 10-locking screw, 11-elastic coupling, 12-mounting plate, 13-anti-rotation column. DETAILED DESCRIPTION

[0017] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0018] As shown in the drawings, Figure 1 The slewing bearing outer ring 201, the mounting plate 12 and the torque motor stator 301 are fixed through positioning steps on the base 1 respectively, the main shaft 4 is fixed through a positioning step on the slewing bearing inner ring 202, the torque motor rotor 302 and the collector ring stator 502 are fixed through positioning steps on the main shaft 4 respectively, the bracket 7 is fixed through the positioning steps and the mounting plate 12, the encoder 6 is fixed through the positioning steps and the bracket 7, and the follower ring 9 is fixed through the positioning steps and the collector ring stator 502.

[0019] One end of the elastic coupling 11 is connected with the encoder 6 out shaft, the other end is connected with the connecting shaft 8, the connecting shaft 8 is 1mm away from the encoder 6 out shaft, the connecting shaft 8 penetrates the collector ring 5 center hole and is fastened with the follower ring 9 through the locking screw 10, the bracket 7 is provided with two symmetrical anti-rotation columns 13, the collector ring rotor 501 end is provided with two symmetrical positioning grooves, the anti-rotation column 13 is embedded in the collector ring rotor (501) positioning groove, and the cooperation clearance is 0.1-0.2mm.

[0020] When the torque motor 3 works, the torque motor rotor 302 drives the main shaft 4 to rotate, the main shaft 4 drives the collector ring stator 502 and the follower ring 9 to rotate, thereby driving the connecting shaft 8 and the encoder 6 out shaft to rotate synchronously, the utility model realizes the axial integration of the encoder transmission mechanism through the hollow structure of the collector ring, compensates the installation error by using the elastic coupling, ensures the positioning accuracy of the rotary table, effectively reduces the axial height size of the rotary table, and solves the technical problem that the space occupation of the traditional structure is too large.

Claims

1. An axial compact fixed structure of a radar turret off-axis encoder, characterized in that Comprise: Coaxial arrangement of main shaft (4) and connecting shaft (8), the main shaft (4) is positioned in the structure center through the swing support (2); the support (7) is positioned coaxially with the main shaft (4) through the mounting plate (12); the collecting ring (5) and the encoder (6) are coaxially installed through the main shaft (4) and the support (7) respectively; the connecting shaft (8) is connected with the encoder (6) out shaft through the elastic coupling (11), and is fastened with the driven ring (9) through the tight screw (10) after penetrating the collecting ring (5) center hole; the support (7) is provided with the rotation stopping column (13) embedded in the collecting ring rotor (501) positioning groove.

2. The axial compact fixing structure of a radar turntable off-axis encoder according to claim 1, characterized in that: The cooperation gap of the rotation stopping column (13) and the collecting ring rotor (501) positioning groove is 0.1-0.2mm.

Images