Photoelectric tracking rotary table

Abstract

The invention relates to the field of photoelectric tracking rotary tables, in particular to a photoelectric tracking rotary table which comprises an outer frame. A load frame; the pitching shaft system comprises a pitching shaft, a bearing, a bearing seat and a plurality of outer gland bodies, the bearing seat is fixed to the outer frame, a shaft hole is formed in the bearing seat, the bearing is installed in the shaft hole, the pitching shaft penetrates through the bearing, the pitching shaft is fixedly connected with the load frame, and the outer gland bodies are detachably and fixedly connected with the bearing seat; wherein a plurality of first waterproof plates are formed on the peripheral side of the pitch shaft, the first waterproof plates are arranged in the axial direction of the pitch shaft at intervals, a water tank extending in the axial direction of the pitch shaft is formed between every two adjacent first waterproof plates at intervals, and the outer gland bodies surround the first waterproof plates and are in sealing fit with the first waterproof plates; the projection of the outer gland body in the radial direction of the pitch axis covers the water tank, and the outer gland body is separated from the first waterproof plate and the water tank. The sealing structure is favorable for improving the dynamic sealing performance of the pitch axis system, and is simple in structure and low in cost.

Description

Technical Field

[0001] The invention relates to the technical field of photoelectric tracking turntables, and in particular to a photoelectric tracking turntable. Background Art

[0002] The photoelectric tracking turntable is a device that integrates optical, mechanical and electronic technologies. It usually consists of an optical system (such as lenses, detectors, etc.), a mechanical structure (used to support and realize movements such as rotation) and an electronic control system.

[0003] In the military field, the optoelectronic tracking turntable can be installed on platforms such as ships, armored vehicles, and aircraft to conduct reconnaissance, surveillance, tracking, and fire control guidance of air, sea, and ground targets. In the civilian field, it can be used for security monitoring, forest fire prevention, environmental monitoring, etc., and can achieve long-distance, high-precision target detection and identification. However, the optoelectronic tracking turntable may encounter various weather conditions when used outdoors, especially rainfall. Therefore, a good seal can prevent rainwater from entering the turntable and avoid damaging precision components such as optical components and electronic devices. This requires it to be able to withstand a certain water pressure to ensure that it will not get in even in severe weather such as heavy rain.

[0004] The existing dynamic seals for the pitch axis of the optoelectronic tracking turntable include rubber seals, mechanical seals and liquid seals. However, rubber seals are difficult to assemble, and the friction resistance conflicts with the seal, affecting the low-speed performance. Liquid seals have stable performance but are complex in structure and high in cost. Mechanical seals require regular replacement of seals and lubricants, which has high maintenance costs and complex installation. Therefore, the above three technologies all have shortcomings and urgently need to be improved and optimized to better meet the requirements of optoelectronic tracking turntables for dynamic seals of the pitch axis. Summary of the invention

[0005] Based on this, it is necessary to provide an optoelectronic tracking turntable to address the existing problems, aiming to improve the dynamic sealing performance of its pitch axis system, with a simple structure and low cost.

[0006] The present application provides an optoelectronic tracking turntable, comprising:

[0007] Frame;

[0008] Load frame;

[0009] A pitch axis system, comprising a pitch axis, a bearing, a bearing seat and a plurality of external pressure covers, wherein the bearing seat is fixed to the outer frame, the bearing seat is provided with an axis hole, the bearing is mounted in the axis hole, the pitch axis is passed through the bearing, the pitch axis is fixedly connected to the load frame, and the external pressure covers are respectively detachably fixedly connected to the bearing seat;

[0010] Among them, a plurality of first waterproof plates are formed on the circumferential side of the pitch axis, and the plurality of first waterproof plates are arranged at intervals in the axial direction of the pitch axis, and a water trough extending along the axial direction of the pitch axis is formed between two adjacent first waterproof plates, and each of the external pressure cover bodies is arranged around each of the first waterproof plates and sealed with each other, and the projection of the external pressure cover body in the radial direction of the pitch axis covers the water trough, and the external pressure cover body and the first waterproof plates and the water trough are spaced from each other.

[0011] In some embodiments, there are two outer pressure cover bodies, each of which is semicircular;

[0012] Among them, one of the two external pressure cover bodies is located above the pitch axis, and the other is located below the pitch axis. The external pressure cover body located below the pitch axis is provided with a water outlet hole, and the water outlet hole is connected to the water tank.

[0013] In some embodiments, there are multiple water tanks, and each of the water tanks is connected to the water outlet respectively.

[0014] In some embodiments, the pitch axis system further comprises:

[0015] A sealing gasket is sandwiched between two adjacent outer pressure cover bodies.

[0016] In some embodiments, the pitch axis system further comprises:

[0017] A cover sealing ring is sandwiched between each of the external pressure covers and the bearing seat.

[0018] In some embodiments, the pitch axis system further comprises:

[0019] A shaft end sealing ring is sandwiched between the pitch axis and the load frame.

[0020] In some embodiments, an annular groove is formed on the end surface of the pitch axis facing the load frame, the shaft end sealing ring is inserted and fixed in the annular groove on the side facing the pitch axis, and a fitting surface is formed on the side of the shaft end sealing ring facing away from the pitch axis, and the fitting surface is sealingly fitted with the surface of the load frame;

[0021] Wherein, the fitting surface includes a plurality of raised curved surfaces smoothly transitionally connected in the radial direction of the shaft end sealing ring, and each of the raised curved surfaces is a closed ring surrounding the circumference of the shaft end sealing ring, and an annular recess is formed between two adjacent raised curved surfaces.

[0022] In some embodiments, the external pressure cover body further includes a second waterproof plate inserted into the water tank, the second waterproof plate and the tank wall of the water tank are spaced apart from each other, and the second waterproof plate extends along the circumference of the pitch axis;

[0023] Wherein, the two second waterproof plates of the two external pressure cover bodies located in the same water tank are arranged in an array in the circumferential direction along the pitch axis to form a closed-loop sealing fit.

[0024] In some embodiments, there are two bearings, the two bearings are sleeved on the pitch axis, a bearing pad is clamped between the two bearings, the pitch axis forms an abutment portion, the photoelectric tracking turntable also includes a locking nut threadedly connected to the pitch axis, and the two bearings are limited and clamped between the abutment portion and the locking nut.

[0025] In some embodiments, there are two groups of pitch axis systems, and both ends of the load frame are rotatably connected to the outer frame through one group of pitch axis systems respectively.

[0026] Beneficial effects of the present invention:

[0027] The pitch shaft system of the present invention has improved dynamic seals. A plurality of first waterproof plates are formed on the circumferential side of the pitch shaft, and the plurality of first waterproof plates are arranged at intervals in the axial direction of the pitch shaft. A water trough extending along the axial direction of the pitch shaft is formed between two adjacent first waterproof plates. Each of the external pressure cover bodies is arranged around each of the first waterproof plates and is sealed with each other. The projection of the external pressure cover body in the radial direction of the pitch shaft covers the water trough, and the external pressure cover body is spaced from the first waterproof plate and the water trough. The plurality of first waterproof plates form a waterproof barrier, which can block the incoming rainwater, thereby achieving a waterproof sealing effect; moreover, the external pressure cover body is spaced from the first waterproof plate and the water trough, and there is no friction between them, so the low-speed performance of the turntable is better; moreover, the plurality of external pressure cover bodies are split structures, which makes the installation and maintenance of the entire pitch shaft system more convenient, and the separate loading, unloading and replacement of the external pressure cover body can be realized. Moreover, this structure is simple in structure, easy to process, and has low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of the present invention. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of an optoelectronic tracking turntable provided for an embodiment of the present invention;

[0030] Figure 2 A partial cross-sectional view of a pitch axis system of an optoelectronic tracking turntable provided in an embodiment of the present invention;

[0031] Figure 3 A top view of a pitch axis system provided for an embodiment of the present invention;

[0032] Figure 4 A schematic diagram of a split pitch axis system provided for an embodiment of the present invention;

[0033] Figure 5 A schematic diagram of a pitch axis and an axis end sealing ring of a pitch axis system provided in an embodiment of the present invention.

[0034] Reference numerals:

[0035] 100, outer frame;

[0036] 200, load frame;

[0037] 300, pitch axis system; 310, pitch axis; 311, first waterproof plate; 312, water tank; 313, annular groove; 314, abutment portion; 320, bearing; 330, bearing seat; 331, shaft hole; 340, external pressure cover; 341, water outlet; 342, second waterproof plate; 350, sealing gasket; 360, cover sealing ring; 370, shaft end sealing ring; 371, raised curved surface; 372, annular recess; 380, bearing pad; 390, locking nut. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly specified and limited, a feature "above" or "below" a second feature may be in direct contact with the second feature, or in indirect contact with the second feature through an intermediate medium. Moreover, a feature "above", "above" and "above" a second feature may mean that the feature is directly above or obliquely above the second feature, or simply means that the feature is higher in level than the second feature. A feature "below", "below" and "below" a second feature may mean that the feature is directly below or obliquely below the second feature, or simply means that the feature is lower in level than the second feature.

[0043] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0044] refer to Figure 1-4The embodiment of the present application provides a photoelectric tracking turntable, which includes an outer frame 100, a load frame 200, and a pitch axis system 300; the pitch axis system 300 includes a pitch axis 310, a bearing 320, a bearing seat 330 and a plurality of external pressure covers 340, the bearing seat 330 is fixed to the outer frame 100, the bearing seat 330 is provided with an axis hole 331, the bearing 320 is installed in the axis hole 331, the pitch axis 310 is passed through the bearing 320, the pitch axis 310 is fixedly connected to the load frame 200, and the external pressure covers 340 are respectively connected to the bearing seats 330. Removable fixed connection; wherein, a plurality of first waterproof plates 311 are formed on the peripheral side of the pitch axis 310, and the plurality of first waterproof plates 311 are arranged at intervals in the axial direction of the pitch axis 310, and a water trough 312 extending along the axial direction of the pitch axis 310 is formed between two adjacent first waterproof plates 311, and each external pressure cover body 340 is arranged around each first waterproof plate 311 and is sealed and matched with each other, and the projection of the external pressure cover body 340 in the radial direction of the pitch axis 310 covers the water trough 312, and the external pressure cover body 340 and the first waterproof plates 311 and the water trough 312 are spaced from each other. It forms a waterproof barrier through multiple first waterproof plates 311, which can block the incoming rainwater, thereby achieving a waterproof sealing effect; moreover, the external pressure cover body 340 and the first waterproof plate 311 and the water tank 312 are spaced from each other, and there is no friction between them, so the low-speed performance of the turntable is good; moreover, the multiple external pressure covers 340 are split structures, making the installation and maintenance of the entire pitch axis system 300 more convenient, and the external pressure cover body 340 can be individually loaded, unloaded and replaced. Moreover, this structure is simple in structure, easy to process, and has low manufacturing cost.

[0045] In some embodiments, reference Figure 1-4 There are two external pressure cover bodies 340, each of which is semicircular; the semicircular shape can realize the loading and unloading of the external pressure cover body 340 without disassembling the pitch axis 310, and there are only two external pressure cover bodies 340, which ensures the convenience of separate loading and unloading, while reducing the number of parts and simplifying the assembly process. Among them, one of the two external pressure cover bodies 340 is located above the pitch axis 310, and the other is located below the pitch axis 310. The external pressure cover body 340 located below the pitch axis 310 is provided with a water outlet 341, and the water outlet 341 is connected to the water tank 312, so that the water in the water tank 312 can be quickly discharged through the water outlet 341, further improving the waterproof performance of the dynamic seal. The water outlet 341 is located at the lower position to prevent rainwater from flowing back, and at the same time has the effect of quickly discharging the water in the water tank 312.

[0046] In some embodiments, reference Figure 1-4There are multiple water tanks 312, each water tank 312 is connected to the water outlet 341 respectively. The multiple water tanks 312 can extend the path length of rainwater entering and guiding to the bearing 320, thereby improving the waterproof sealing effect. Moreover, the multiple water tanks 312 are all connected to the water outlet 341, so that the rainwater therein can be quickly discharged, further improving the waterproof performance and achieving a better dynamic sealing effect.

[0047] refer to Figure 1-4 In some embodiments, the pitch axis system 300 further includes a sealing gasket 350 , and a sealing gasket 350 is sandwiched between two adjacent external pressure cover bodies 340 , thereby achieving a static sealing fit between the external pressure cover bodies 340 through the sealing gasket 350 , further improving the sealing effect.

[0048] In some embodiments, reference Figure 1-4 The pitch axis system 300 also includes a cover body sealing ring 360, which is sandwiched between each external pressure cover body 340 and the bearing seat 330. The cover body sealing ring 360 has the effect of statically sealing the gap between each external pressure cover body 340 and the bearing seat 330, further improving the waterproof sealing effect, and preventing rainwater from extending into the gap between each external pressure cover body 340 and the bearing seat 330 and flowing to the bearing 320 position.

[0049] refer to Figure 1-4 In some embodiments, the pitch axis system 300 further includes an axis end sealing ring 370, which is sandwiched between the pitch axis 310 and the load frame 200. The axis end sealing ring 370 serves to provide a static seal between the pitch axis 310 and the load frame 200, thereby preventing rainwater from penetrating into other positions through the gap between the pitch axis 310 and the load frame 200, thereby improving the static sealing effect of the optoelectronic tracking turntable at this position.

[0050] In some embodiments, reference Figure 2-5 An annular groove 313 is provided on the end surface of the pitch axis 310 facing the load frame 200, and the shaft end sealing ring 370 is inserted and fixed in the annular groove 313 on the side facing the pitch axis 310, and a fitting surface is formed on the side of the shaft end sealing ring 370 facing away from the pitch axis 310, and the fitting surface is sealed and fitted with the surface of the load frame 200; wherein, the fitting surface includes a plurality of convex curved surfaces 371 smoothly transitioned and connected in the radial direction of the shaft end sealing ring 370, and each convex curved surface 371 is a closed ring surrounding the circumference of the shaft end sealing ring 370, and an annular recess 372 is formed between two adjacent convex curved surfaces 371, and then the convex curved surface 371 can increase the contact area with the surface of the load frame 200 after extrusion deformation, thereby improving the sealing effect, and at the same time, the extrusion deformation of the convex curved surface 371 can also improve the clamping force of the shaft end sealing ring 370 between the load frame 200 and the pitch axis 310, so that the sealing is more reliable.

[0051] refer to Figure 1-4 In some embodiments, the external pressure cover body 340 further includes a second waterproof plate 342 inserted into the water tank 312, the second waterproof plate 342 is spaced from the wall of the water tank 312, and the second waterproof plate 342 extends along the circumference of the pitch axis 310; wherein, the two second waterproof plates 342 of the two external pressure cover bodies 340 located in the same water tank 312 are arranged in an array along the circumference of the pitch axis 310 to form a closed-loop sealing fit. When the leaked rainwater flows in the water tank 312, it contacts the side wall of the second waterproof plate 342. At this time, the friction generated by the viscosity of the liquid slows down the flow rate and reduces the flow rate. The friction along the water tank 312 and the local friction resistance constitute a friction effect, which reduces the further infiltration of rainwater, thereby further improving the sealing effect.

[0052] In some embodiments, reference Figure 1-4 There are two bearings 320, and the two bearings 320 are sleeved on the pitch axis 310. A bearing pad 380 is sandwiched between the two bearings 320. The pitch axis 310 forms an abutment portion 314. The photoelectric tracking turntable also includes a locking nut 390 threadedly connected to the pitch axis 310. The two bearings 320 are limitedly clamped between the abutment portion 314 and the locking nut 390, thereby achieving position fixation of the bearings 320. At the same time, the cooperation of the bearing pad 380 and the locking nut 390 can better adjust the preload force between the two bearings 320 to adjust the lubricating oil gap between the two bearings 320.

[0053] In some embodiments, reference Figure 1-4 There are two groups of pitch axis systems 300, and both ends of the load frame 200 are rotatably connected to the outer frame 100 through a group of pitch axis systems 300, thereby realizing pitchable suspended support for the load frame 200, and the structure is stable and reliable.

[0054] Finally, it should be noted that the various technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above embodiment only expresses one implementation of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.

Claims

1. A photoelectric tracking turntable, characterized in that: include: Frame(100); Load frame (200); A pitch axis system (300) comprises a pitch axis (310), a bearing (320), a bearing seat (330) and a plurality of external pressure covers (340), wherein the bearing seat (330) is fixed to the outer frame (100), the bearing seat (330) is provided with an axis hole (331), the bearing (320) is installed in the axis hole (331), the pitch axis (310) is passed through the bearing (320), the pitch axis (310) is fixedly connected to the load frame (200), and the external pressure covers (340) are respectively detachably fixedly connected to the bearing seats (330); A plurality of first waterproof plates (311) are formed on the peripheral side of the pitch axis (310), and the plurality of first waterproof plates (311) are arranged at intervals in the axial direction of the pitch axis (310), and a water trough (312) extending along the axial direction of the pitch axis (310) is formed between two adjacent first waterproof plates (311), and each of the external pressure cover bodies (340) is arranged around each of the first waterproof plates (311) and is sealed with each other, and the projection of the external pressure cover body (340) in the radial direction of the pitch axis (310) covers the water trough (312), and the external pressure cover body (340) and the first waterproof plates (311) and the water trough (312) are spaced from each other.

2. The photoelectric tracking turntable according to claim 1, characterized in that: There are two external pressure cover bodies (340), and each of the external pressure cover bodies (340) is semicircular; Among them, one of the two external pressure cover bodies (340) is located above the pitch axis (310), and the other is located below the pitch axis (310). The external pressure cover body (340) located below the pitch axis (310) is provided with a water outlet (341), and the water outlet (341) is connected to the water tank (312).

3. The photoelectric tracking turntable according to claim 2, characterized in that: There are a plurality of water tanks (312), and each of the water tanks (312) is connected to the water outlet hole (341) respectively.

4. The photoelectric tracking turntable according to claim 1, characterized in that: The pitch axis system (300) further comprises: A sealing gasket (350) is sandwiched between two adjacent outer pressure cover bodies (340).

5. The photoelectric tracking turntable according to claim 1, characterized in that: The pitch axis system (300) further comprises: A cover body sealing ring (360), wherein the cover body sealing ring (360) is sandwiched between each of the external pressure cover bodies (340) and the bearing seat (330).

6. The photoelectric tracking turntable according to claim 1, characterized in that: The pitch axis system (300) further comprises: A shaft end sealing ring (370), wherein the shaft end sealing ring (370) is sandwiched between the pitch axis (310) and the load frame (200).

7. The photoelectric tracking turntable according to claim 6, characterized in that: An annular groove (313) is provided on the end surface of the pitch axis (310) facing the load frame (200); the shaft end sealing ring (370) is inserted and fixed in the annular groove (313) on the side facing the pitch axis (310); a fitting surface is formed on the side of the shaft end sealing ring (370) facing away from the pitch axis (310); the fitting surface is sealingly fitted with the surface of the load frame (200); The fitting surface comprises a plurality of raised curved surfaces (371) smoothly connected in the radial direction of the shaft end sealing ring (370), and each of the raised curved surfaces (371) is a closed ring surrounding the circumference of the shaft end sealing ring (370), and an annular recess (372) is formed between two adjacent raised curved surfaces (371).

8. The photoelectric tracking turntable according to claim 1, characterized in that: The external pressure cover body (340) further comprises a second waterproof plate (342) inserted into the water tank (312), the second waterproof plate (342) and the tank wall of the water tank (312) being spaced apart from each other, and the second waterproof plate (342) extending along the circumference of the pitch axis (310); Wherein, the two second waterproof plates (342) of the two external pressure cover bodies (340) located in the same water tank (312) are arranged in an array in the circumferential direction along the pitch axis (310) to form a closed-loop sealing fit.

9. The photoelectric tracking turntable according to claim 1, characterized in that: There are two bearings (320), the two bearings (320) are sleeved on the pitch axis (310), a bearing pad (380) is sandwiched between the two bearings (320), the pitch axis (310) is formed with an abutment portion (314), the photoelectric tracking turntable also includes a locking nut (390) threadedly connected to the pitch axis (310), and the two bearings (320) are limitedly clamped between the abutment portion (314) and the locking nut (390).

10. The photoelectric tracking turntable according to claim 1, characterized in that: There are two groups of pitch axis systems (300), and the two ends of the load frame (200) are rotatably connected to the outer frame (100) through a group of pitch axis systems (300).

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