Pitching sensing module of photoelectric rotary table

Abstract

The invention belongs to the technical field of photoelectric monitoring, and particularly relates to a photoelectric rotary table pitching sensing module which comprises a stepped shaft arranged at one end of a pitching rotating shaft of a photoelectric rotary table, the stepped shaft is installed in a bearing seat, and an oil seal, a deep groove ball bearing and a pressing ring are sequentially arranged between the stepped shaft and the bearing seat from the inner end to the outer end; the stepped shaft at the outer end of the pressing ring is fixedly connected with a limiting column, the outer end face of the bearing seat is provided with a limiting check block, and the limiting check block is located on the movement track of the limiting column rotating along with the stepped shaft; the outer end face of the stepped shaft is fixedly connected with an absolute type encoder rotor, the absolute type encoder rotor is embedded in an absolute type encoder stator, and the absolute type encoder stator is installed on the bearing seat through an absolute type encoder installation seat. The photoelectric rotary table pitching sensing module is convenient to assemble, maintain and disassemble, and meanwhile, a step labyrinth seal and oil seal contact sealing combination is used, so that the water-proof, salt-proof and sand-proof capabilities of the photoelectric rotary table pitching sensing module are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of photoelectric monitoring, and in particular relates to a photoelectric turntable pitch sensing module. Background Art

[0002] With the advancement and development of optoelectronic detection technology and equipment, optoelectronic turntables play an increasingly important role in national defense and civilian fields, and their applications are becoming more and more extensive, such as border monitoring, shipborne monitoring, urban air defense, and forest fire prevention.

[0003] The pitch sensing system is generally located at the rotating part of the pitch assembly of the optoelectronic turntable, and is used to sense the rotation angle of the pitch axis. The existing pitch sensing system is difficult to install, disassemble and repair, and has high costs. At the same time, the failure rate is high in areas such as sea and desert, and the ability to withstand harsh environments is poor. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a photoelectric turntable pitch sensing module. By modularizing the pitch sensing system, it is not only easy to assemble, but also easy to maintain and disassemble. At the same time, a combination of stepped labyrinth seal and oil seal contact seal is used to improve its waterproof, salt-proof and wind-sandproof capabilities.

[0005] Specifically, the present invention provides the following technical solutions:

[0006] A photoelectric turntable pitch sensing module comprises a stepped shaft arranged at one end of the pitch rotation axis of the photoelectric turntable, wherein the diameter of the steps of the stepped shaft decreases from the inner end to the outer end;

[0007] The stepped shaft is installed in the bearing seat, and an oil seal, a deep groove ball bearing and a pressure ring are arranged in sequence from the inner end to the outer end between the stepped shaft and the bearing seat;

[0008] A limit column is fixedly connected to the stepped shaft at the outer end of the pressure ring, and a limit stopper is provided on the outer end surface of the bearing seat, and the limit stopper is located on the motion trajectory of the limit column rotating with the stepped shaft;

[0009] An absolute encoder rotor is fixedly connected to the outer end surface of the stepped shaft. The absolute encoder rotor is embedded in the absolute encoder stator. The absolute encoder stator is mounted on the bearing seat through an absolute encoder mounting seat.

[0010] Preferably, the pressure ring is composed of two layers, an inner pressure ring and an outer pressure ring, and a gap is provided between the inner pressure ring and the outer pressure ring;

[0011] The inner pressure ring is installed on the stepped shaft to press the inner ring of the deep groove ball bearing;

[0012] The outer pressure ring is installed on the bearing seat to press the outer ring of the deep groove ball bearing.

[0013] Preferably, there are two deep groove ball bearings installed on the bearing seat.

[0014] Preferably, the oil seal is installed on the bearing seat.

[0015] Preferably, the stepped shaft is made of stainless steel, and the bearing seat is made of aluminum alloy. Studies have shown that salt deposits are easily accumulated in humid coastal areas. If the stepped shaft and the bearing seat are made of materials with the same hardness, adhesion is likely to occur, resulting in failure of the labyrinth seal. The present invention preferably uses the above materials for the stepped shaft and the bearing seat. The stepped shaft is stronger than the bearing seat, and the salt deposits are easily worn off, and adhesion is not likely to occur.

[0016] Beneficial effects achieved by the present invention:

[0017] (1) The optoelectronic turntable pitch sensing module provided by the present invention has a modular design, rationally utilizes the structural space, is convenient for component assembly, and is convenient for disassembly and maintenance, and has a wide range of applications in military and civilian fields;

[0018] (2) The pitch sensing module of the optoelectronic turntable provided by the present invention, the pitch axis, the bearing seat and other components are combined to form a stepped labyrinth seal, which can prevent the entry of water such as waves and rainstorms, and can also prevent the entry of relatively large sand particles; at the same time, the oil seal forms a second contact seal, further improving its environmental resistance to salt, rainstorm and sandstorm, and can adapt to harsh environments such as border defense and deserts;

[0019] (3) The pitch sensing module of the photoelectric turntable provided by the present invention is compact by integrating the shaft, bearing seat, absolute encoder, etc., and the modular design makes the module an independent module, which can match different sensing modules according to different product detection accuracy requirements to achieve design interchangeability, which is not only convenient for maintenance, but also convenient for rapid response to different customer needs. Different from the previous photoelectric turntable, this module integrates a mechanical limit design, and integrates the limit into the sensing module, so that the installation position of its limit column is coaxial with the rotation center. The advantage of this is that it saves the lever arm, and then reduces the torque on the limit column under the condition of limiting the same impact speed, thereby reducing the impact force on the limit column, and the limit column can be designed to be smaller and more compact, achieving a compact and lightweight structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the photoelectric turntable; among them, the photoelectric sensor component 01, the pitch component 02, and the azimuth component 03.

[0021] Figure 2It is a structural schematic diagram of the pitch sensing module; among them, the bearing seat 1, the absolute encoder mounting seat 2, the limit column 3, the absolute encoder stator 4, the absolute encoder rotor 5, the stepped shaft 6, the inner pressure ring 7, the outer pressure ring 8, the deep groove ball bearing 9, and the oil seal 10.

[0022] Figure 3 The main view (left) and AA section view (right) of the bearing seat.

[0023] Figure 4 and Figure 5 A schematic diagram of the bearing seat.

[0024] Figure 6 The main view (left) and AA section view (right) of the stepped shaft.

[0025] Figure 7 and Figure 8 Schematic diagram of a stepped shaft.

[0026] Fig. 9 and Fig.10 This is a schematic diagram of the combination of the bearing seat, absolute encoder mounting seat and stepped shaft. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0028] like Figure 1 As shown, the photoelectric turntable provided in the embodiment of the present invention includes a photoelectric sensor assembly 01, a pitch assembly 02 and an azimuth assembly 03; the pitch assembly 02 is installed on the azimuth assembly 03 and can rotate around the azimuth rotation axis, and the photoelectric sensor assembly 01 is installed in the pitch assembly 02 and can rotate around the pitch rotation axis; the pitch sensing module is located at one end of the pitch rotation axis, and is used to sense the pitch angle information of the photoelectric sensor assembly 01;

[0029] like Figure 2-Figure 10 As shown, the pitch sensing module includes a stepped shaft 6 arranged at one end of the pitch rotation axis of the photoelectric turntable (that is, one end of the pitch rotation axis is set as a stepped shaft), and the diameter of the steps of the stepped shaft 6 decreases from the inner end to the outer end;

[0030] The stepped shaft 6 is installed in the bearing seat 1, and an oil seal 10, a deep groove ball bearing 9 and a pressure ring are arranged in sequence from the inner end to the outer end between the stepped shaft and the bearing seat;

[0031] The limit column 3 is fixed on the stepped shaft 6 at the outer end of the pressure ring by screws, and the outer end surface of the bearing seat 1 is grooved to form a limit block, and the limit block is located on the motion trajectory of the limit column 3 rotating with the stepped shaft 6, and the angle can be customized according to needs;

[0032] The absolute encoder mounting seat 2 is fixed on the bearing seat 1 by screws, the absolute encoder stator 4 is coaxially fixed on the encoder mounting seat 2, the absolute encoder rotor 5 is coaxially fixed on the outer end surface of the stepped shaft 6, and the absolute encoder rotor 5 is embedded in the absolute encoder stator 4, and a gap is provided between the two to ensure the gap of relative motion and to obtain the speed information and motion state of the encoder rotor;

[0033] The pressure ring is composed of two layers, an inner pressure ring 7 and an outer pressure ring 8, and a gap is provided between the inner pressure ring 7 and the outer pressure ring 8;

[0034] The inner pressure ring 7 is installed on the stepped shaft 6 and connected by threads to press the inner ring of the deep groove ball bearing 9;

[0035] The outer pressure ring 8 is installed on the bearing seat 1 and connected by threads to press the outer ring of the deep groove ball bearing 9;

[0036] There are two deep groove ball bearings 9 installed on the bearing seat 1;

[0037] The oil seal 10 is coaxially mounted on the bearing seat 1;

[0038] The stepped shaft 6 is made of stainless steel, and the bearing seat 1 is made of aluminum alloy.

[0039] Although the present invention has been described in detail above by general description, specific implementation methods and experiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A photoelectric turntable pitch sensing module, characterized in that: It comprises a stepped shaft arranged at one end of the pitch rotation axis of the photoelectric turntable, wherein the diameter of the steps of the stepped shaft decreases from the inner end to the outer end; The stepped shaft is installed in the bearing seat, and an oil seal, a deep groove ball bearing and a pressure ring are arranged in sequence from the inner end to the outer end between the stepped shaft and the bearing seat; A limit column is fixedly connected to the stepped shaft at the outer end of the pressure ring, and a limit stopper is provided on the outer end surface of the bearing seat, and the limit stopper is located on the motion trajectory of the limit column rotating with the stepped shaft; An absolute encoder rotor is fixedly connected to the outer end surface of the stepped shaft. The absolute encoder rotor is embedded in the absolute encoder stator. The absolute encoder stator is mounted on the bearing seat through an absolute encoder mounting seat.

2. The photoelectric turntable pitch sensing module according to claim 1, characterized in that: The pressure ring is composed of two layers, an inner pressure ring and an outer pressure ring, and a gap is provided between the inner pressure ring and the outer pressure ring; The inner pressure ring is installed on the stepped shaft to press the inner ring of the deep groove ball bearing; The outer pressure ring is installed on the bearing seat to press the outer ring of the deep groove ball bearing.

3. The photoelectric turntable pitch sensing module according to claim 1 or 2, characterized in that: There are two deep groove ball bearings installed on the bearing seat.

4. The photoelectric turntable pitch sensing module according to claim 1 or 2, characterized in that: The oil seal is mounted on the bearing seat.

5. The photoelectric turntable pitch sensing module according to claim 1 or 2, characterized in that: The stepped shaft is made of stainless steel, and the bearing seat is made of aluminum alloy.

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