A dual-axis turntable and radar equipment

Abstract

This invention relates to the field of radar technology and discloses a dual-axis turntable and radar equipment. A dual-axis turntable includes: a transmission mechanism, a first drive mechanism, a second drive mechanism, and a product mounting assembly; the transmission mechanism includes a sun gear, which is composed of bevel gears, and a first planetary gear and a second planetary gear meshing with the sun gear; two first drive mechanisms, each including a mechanism body and a drive shaft; the two drive shafts are respectively fixedly connected to the first planetary gear and the second planetary gear; the product mounting assembly is fixedly mounted on the mechanism bodies of the two first drive mechanisms; the first drive mechanism and the second drive mechanism control the first drive shaft to rotate in the same direction or in opposite directions to achieve horizontal rotation or pitch rotation. Compared with traditional turntables, the dual-axis turntable provided by this invention greatly simplifies the structure, reduces the overall size, improves convenience, and significantly reduces maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of turntable technology, and more particularly to a dual-axis turntable and radar equipment. Background Technology

[0002] Currently, radar is an electronic device that uses electromagnetic waves to detect targets. Radar emits electromagnetic waves to illuminate the target and receives its echo, thereby obtaining information such as the distance from the target to the electromagnetic wave emission point, the rate of change of distance (radial velocity), azimuth, and altitude.

[0003] To achieve omnidirectional scanning and detection, radar is often mounted on a turntable, which allows for azimuth and elevation movements. Most existing turntables are either T-shaped or U-shaped, but both types have the following drawbacks:

[0004] First, both of these turntables are generally quite large and have poor portability, making them unsuitable for use with small products like radar.

[0005] Second, due to various factors such as manufacturing tolerances, wear caused by long-term operation, and design of assembly gaps, transmission gaps are easily generated in the turntable. These transmission gaps will significantly affect the motion accuracy of the turntable. Therefore, existing turntables usually use a dual-motor backlash elimination method. This backlash elimination method is not only costly to implement, but also occupies more assembly space. Summary of the Invention

[0006] The purpose of this invention is to provide a dual-axis turntable to simultaneously solve the defects of traditional turntables, such as large size and high backlash elimination cost.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A dual-axis rotary table includes: a transmission mechanism, a first drive mechanism, a second drive mechanism, and a product mounting assembly for carrying a target product;

[0009] The transmission mechanism includes a sun gear, a first planet gear, and a second planet gear, all of which are bevel gears. The first planet gear and the second planet gear mesh with the sun gear on the same side, respectively.

[0010] The first drive mechanism includes a first mechanism body and a first drive shaft; one end of the first drive shaft is rotatably connected to the first mechanism body, and the other end is fixedly connected to the first planetary gear;

[0011] The second drive mechanism includes a second mechanism body and a second drive shaft; one end of the second drive shaft is rotatably connected to the second mechanism body, and the other end is fixedly connected to the second planetary gear.

[0012] The product mounting components are fixedly mounted on the first mechanism body and / or the second mechanism body;

[0013] The first drive mechanism and the second drive mechanism control the first drive shaft and the second drive shaft to rotate in the same direction, so as to drive the first planetary gear and the second planetary gear to rotate in the same direction relative to the sun gear, thereby driving the target product to achieve the rotation of the azimuth plane through the first mechanism body and / or the second mechanism body;

[0014] Alternatively, the first drive mechanism and the second drive mechanism control the first drive shaft and the second drive shaft to rotate in opposite directions, so as to drive the first planetary gear and the second planetary gear to rotate in opposite directions relative to the sun gear until they are jammed, thereby driving the first mechanism body and the second mechanism body to rotate relative to the first drive shaft and the second drive shaft, so as to drive the target product to achieve the rotation of the pitch plane.

[0015] Optionally, the first planetary gear and the second planetary gear are centrally symmetrically distributed with respect to the central axis of the sun gear.

[0016] Optionally, the first drive shaft and the second drive shaft rotate at the same speed.

[0017] Optionally, it may also include a connecting member located between the first planetary gear and the second planetary gear;

[0018] The connector includes a central body and a first connecting portion and a second connecting portion fixedly disposed on the central body. The first connecting portion is fixedly disposed through the center of the first planetary gear, and the second connecting portion is fixedly disposed through the center of the second planetary gear.

[0019] Optionally, a spindle may also be included;

[0020] The main shaft passes through the center of the sun gear and is rotatably connected to the sun gear; at the same time, the end of the main shaft near the central body is fixedly connected to the central body.

[0021] Optionally, the main shaft is rotatably connected to the sun gear via a rolling bearing;

[0022] The rolling bearing includes an inner ring, an outer ring, rolling elements, and a bearing housing; the outer ring is fitted over the outer ring, the rolling elements are distributed between the outer ring and the inner ring, and the bearing housing is fixedly fitted over the outer ring to support the sun gear.

[0023] Optionally, the product mounting assembly includes a first mounting bracket and a second mounting bracket;

[0024] The first mounting bracket is fixedly mounted on the first mechanism body, and the second mounting bracket is fixedly mounted on the second mechanism body.

[0025] Optionally, both the first mounting bracket and the second mounting bracket include a connecting plate and a mounting plate that are perpendicularly connected to each other;

[0026] The two connecting plates are fixedly fitted onto the ends of the first mechanism body or the second mechanism body, and the mounting surfaces of the two mounting plates are located in the same orientation plane.

[0027] A radar device includes a radar body and a dual-axis turntable as described in any of the preceding claims, the radar body being fixedly mounted on the product mounting assembly.

[0028] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0029] The dual-axis turntable provided in this invention realizes horizontal rotation and pitch rotation functions by using planetary gear transmission and bevel gear transmission. Compared with traditional T-shaped or U-shaped turntables, it greatly simplifies the structure, reduces the overall volume, and improves convenience. Moreover, since the two planetary gears are in contact with the sun gear for transmission at the same time, the transmission backlash between gears can be eliminated simply, effectively, and at low cost, greatly reducing maintenance costs. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is an assembly structure diagram of a dual-axis rotary table provided in an embodiment of the present invention;

[0032] Figure 2 This is a top view of a dual-axis rotary table provided in an embodiment of the present invention;

[0033] Figure 3 A side view of a dual-axis rotary table provided in an embodiment of the present invention;

[0034] Figure 4 An assembly structure diagram of the various components of the transmission mechanism provided in an embodiment of the present invention;

[0035] Figure 5 This is an assembly structure diagram of the spindle and rolling bearing provided in an embodiment of the present invention.

[0036] [Attached image labels]

[0037] 1. Transmission mechanism; 2. First drive mechanism; 3. Second drive mechanism; 4. Product mounting assembly; 5. Connecting parts; 6. Main shaft; 7. Rolling bearing;

[0038] Sun wheel 11, First planet wheel 12, Second planet wheel 13;

[0039] First mechanism body 21, first drive shaft 22;

[0040] Second mechanism body 31, second drive shaft 32;

[0041] First mounting bracket 41, second mounting bracket 42;

[0042] Central body 51, first connecting part 52, second connecting part 53;

[0043] Inner ring 71, outer ring 72, rolling element 73, bearing 74. Detailed Implementation

[0044] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0045] This invention provides a dual-axis turntable that can easily and cost-effectively achieve time-sharing rotation in the azimuth and pitch planes, and can also effectively eliminate backlash.

[0046] It is understood that this dual-axis turntable can be applied to any target product that requires rotation, and the present invention does not limit this target product.

[0047] Please see Figure 1 The dual-axis turntable provided in this embodiment of the invention includes: a transmission mechanism 1, a first drive mechanism 2, a second drive mechanism 3, and a product mounting assembly 4 for carrying the target product.

[0048] The transmission mechanism 1 includes a sun gear 11, a first planet gear 12, and a second planet gear 13, all of which are bevel gears. The first planet gear 12 and the second planet gear 13 mesh with the sun gear 11 on the same side, respectively.

[0049] The first drive mechanism 2 includes a first mechanism body 21 and a first drive shaft 22; one end of the first drive shaft 22 is rotatably connected to the first mechanism body 21, and the other end is fixedly connected to the first planetary gear 12.

[0050] The second drive mechanism 3 includes a second mechanism body 31 and a second drive shaft 32; one end of the second drive shaft 32 is rotatably connected to the second mechanism body 31, and the other end is fixedly connected to the second planetary gear 13.

[0051] Product mounting component 4 is fixedly mounted on the first mechanism body 21 and / or the second mechanism body 31;

[0052] The first drive mechanism 2 and the second drive mechanism 3 are used to control the first drive shaft 22 and the second drive shaft 32 to rotate in the same direction or in opposite directions.

[0053] The dual-axis rotary table of this invention can achieve horizontal rotation by utilizing the planetary gear transmission principle. The specific implementation process of horizontal rotation is as follows: Please refer to... Figure 1 and Figure 2 When the first drive shaft 22 and the second drive shaft 32 rotate in the same direction (here, "in the same direction" means that each drive shaft rotates in the same direction relative to its respective connected mechanism body), since the first drive shaft 22 is fixedly connected to the first planetary gear 12 and the second drive shaft 32 is fixedly connected to the second planetary gear 13, the first drive shaft 22 and the second drive shaft 32 can drive the first planetary gear 12 and the second planetary gear 13 to rotate in the same direction relative to the sun gear 11 in the same orientation plane. At the same time, the first mechanism body 21 and the second mechanism body 31 can rotate with their respective drive shafts, thereby driving the target product installed on the first mechanism body 21 and / or the second mechanism body 31 to achieve orientation plane rotation.

[0054] The dual-axis rotary table of this invention can also achieve pitch motion by utilizing the bevel gear transmission principle. The specific implementation process of pitch motion is as follows: Please refer to... Figure 1 and Figure 3 When the first drive shaft 22 and the second drive shaft 32 rotate in opposite directions (here, "opposite directions" means that the rotation directions of each drive shaft relative to its respective connected mechanism body are opposite), since the first drive shaft 22 is fixedly connected to the first planetary gear 12 and the second drive shaft 32 is fixedly connected to the second planetary gear 13, the first drive shaft 22 and the second drive shaft 32 can drive the first planetary gear 12 and the second planetary gear 13 to rotate in opposite directions relative to the sun gear 11 in the same orientation plane. At this time, the first planetary gear 12 and the sun gear 11 and the second planetary gear 13 and the sun gear 11 will be locked together, thereby forcing the first mechanism body 21 and the second mechanism body 31, which are rotated and connected to their respective drive shafts, to rotate in the same direction (here, "in the same direction" means that the rotation directions of the first mechanism body 21 and the second mechanism body 31 relative to the sun gear 11 are the same), thereby achieving the effect of pitch rotation.

[0055] In summary, the dual-axis turntable provided in this embodiment of the invention realizes horizontal rotation and pitch rotation functions by using planetary gear transmission and bevel gear transmission. Compared with traditional T-shaped or U-shaped turntables, it greatly simplifies the structure, reduces the overall volume, and improves convenience. Moreover, since the two planetary gears are in contact with the sun gear 11 for transmission at the same time, the transmission gap between gears can be eliminated simply, effectively, and at low cost, greatly reducing maintenance costs.

[0056] It should be noted that, with the interaction of the two planetary gears and the sun gear 11, either the first mechanism body 21 or the second mechanism body 31 can achieve pitch and horizontal rotation. Therefore, the product mounting assembly 4, used to support the target product, can be mounted alone on the first mechanism body 21, alone on the second mechanism body 31, or simultaneously on both, all of which can achieve the function of driving the target product to achieve pitch and horizontal rotation.

[0057] In one alternative embodiment, to achieve good balance, the first planetary gear 12 and the second planetary gear 13 are centrally symmetrically distributed around the central axis of the sun gear 11. Furthermore, the product mounting assembly 4 is simultaneously fixedly mounted on the first mechanism body 21 and / or the second mechanism body 31, thus enabling stable and reliable pitch and horizontal rotation.

[0058] In order to cause a jamming phenomenon that forces the first mechanism body 21 and the second mechanism body 31 to pitch and rotate, it is necessary to ensure that when the first drive shaft 22 and the second drive shaft 32 rotate in opposite directions, the magnitudes of the two opposing forces acting on the sun gear 11 are basically equal. Therefore, when the structural dimensions of the first planetary gear 12 and the second planetary gear 13 are exactly the same, the rotation speeds of the first drive shaft 22 and the second drive shaft 32 can be controlled to be basically the same.

[0059] For ease of assembly and control, please refer to Figure 4 The dual-axis rotary table of this embodiment of the invention also includes a connector 5 located between the first planetary gear 12 and the second planetary gear 13. The connector 5 includes a central body 51 and a first connecting portion 52 and a second connecting portion 53 fixedly disposed on the central body 51. The first connecting portion 52 is fixedly disposed through the center of the first planetary gear 12, and the second connecting portion 53 is fixedly disposed through the center of the second planetary gear 13.

[0060] For further details, please refer to Figure 3 and Figure 4 The dual-axis turntable of this embodiment of the invention also includes a main shaft 6; the main shaft 6 passes through the center of the sun gear 11 and is rotatably connected to the sun gear 11; at the same time, the end of the main shaft 6 near the connector 5 is fixedly connected to the central body 51 of the connector 5.

[0061] In one alternative implementation, please refer to Figure 5 The main shaft 6 can be rotatably connected to the sun gear 11 via a rolling bearing 7. The rolling bearing 7 includes an inner ring 71, an outer ring 72, rolling elements 73, and a bearing housing 74. The outer ring 72 is fitted over the inner ring 71, the rolling elements 73 are distributed between the outer ring 72 and the inner ring 71, and the bearing housing 74 is fixedly fitted over the outer ring 72 to support the sun gear 11. This rolling bearing 7 has advantages such as convenient use and maintenance, reliable operation, good starting performance, and high load-bearing capacity at medium speeds. Of course, in other embodiments, various other conventional components capable of relative rotation can also be used.

[0062] To achieve stable and reliable pitch and horizontal rotation, the product mounting assembly 4 may include a first mounting bracket 41 and a second mounting bracket 42 that are separated from each other; the first mounting bracket 41 is fixedly mounted on the first mechanism body 21, and the second mounting bracket 42 is fixedly mounted on the second mechanism body 31.

[0063] Furthermore, both the first mounting bracket 41 and the second mounting bracket 42 may include a connecting plate and a mounting plate that are perpendicularly connected to each other; the two connecting plates are fixedly fitted onto the ends of the first mechanism body 21 or the second mechanism body 31, and the mounting surfaces of the two mounting plates are located in the same orientation plane.

[0064] This invention also provides a radar device, including a radar body and a dual-axis turntable as described above, wherein the radar body is fixedly mounted on the product mounting assembly 4 of the dual-axis turntable.

[0065] In this embodiment, since the radar body is mounted on the aforementioned dual-axis turntable, it is possible to achieve horizontal and pitch rotation of the radar body, which is not only simple and convenient but also inexpensive.

[0066] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dual-axis rotary table, characterized in that, include: Transmission mechanism (1), first drive mechanism (2), second drive mechanism (3), and product mounting assembly (4) for carrying the target product; The transmission mechanism (1) includes a sun gear (11), a first planet gear (12), and a second planet gear (13), all of which are bevel gears. The first planet gear (12) and the second planet gear (13) mesh with the sun gear (11) on the same side, respectively. The first drive mechanism (2) includes a first mechanism body (21) and a first drive shaft (22); one end of the first drive shaft (22) is rotatably connected to the first mechanism body (21), and the other end is fixedly connected to the first planetary gear (12); The second drive mechanism (3) includes a second mechanism body (31) and a second drive shaft (32); one end of the second drive shaft (32) is rotatably connected to the second mechanism body (31), and the other end is fixedly connected to the second planetary gear (13); The product mounting component (4) is fixedly mounted on the first mechanism body (21) and / or the second mechanism body (31); The first drive mechanism (2) and the second drive mechanism (3) control the first drive shaft (22) and the second drive shaft (32) to rotate in the same direction, so as to drive the first planetary gear (12) and the second planetary gear (13) to rotate in the same direction relative to the sun gear (11), and then drive the target product to achieve the rotation of the azimuth plane through the first mechanism body (21) and / or the second mechanism body (31); Alternatively, the first drive mechanism (2) and the second drive mechanism (3) control the first drive shaft (22) and the second drive shaft (32) to rotate in opposite directions, so as to drive the first planetary gear (12) and the second planetary gear (13) to rotate in opposite directions relative to the sun gear (11) until they are jammed, thereby driving the first mechanism body (21) and the second mechanism body (31) to rotate relative to the first drive shaft (22) and the second drive shaft (32), so as to drive the target product to achieve the rotation of the pitch plane; The first planetary gear (12) and the second planetary gear (13) are centrally symmetrically distributed with the central axis of the sun gear (11) as the center; The product mounting assembly (4) includes a first mounting bracket (41) and a second mounting bracket (42); The first mounting bracket (41) is fixedly mounted on the first mechanism body (21), and the second mounting bracket (42) is fixedly mounted on the second mechanism body (31); Both the first mounting bracket (41) and the second mounting bracket (42) include a connecting plate and a mounting plate that are perpendicularly connected to each other; The two connecting plates are fixedly fitted onto the ends of the first mechanism body (21) or the second mechanism body (31), and the mounting surfaces of the two mounting plates are located in the same orientation plane.

2. The dual-axis rotary table according to claim 1, characterized in that, The first drive shaft (22) and the second drive shaft (32) rotate at the same speed.

3. The dual-axis rotary table according to claim 2, characterized in that, It also includes a connector (5) located between the first planetary gear (12) and the second planetary gear (13); The connector (5) includes a central body (51) and a first connecting part (52) and a second connecting part (53) fixedly disposed on the central body (51). The first connecting part (52) is fixedly disposed at the center of the first planetary gear (12), and the second connecting part (53) is fixedly disposed at the center of the second planetary gear (13).

4. The dual-axis rotary table according to claim 3, characterized in that, It also includes the spindle (6); The main shaft (6) passes through the center of the sun gear (11) and is rotatably connected to the sun gear (11); at the same time, the end of the main shaft (6) near the central body (51) is fixedly connected to the central body (51).

5. The dual-axis rotary table according to claim 4, characterized in that, The main shaft (6) is rotatably connected to the sun gear (11) via a rolling bearing (7); The rolling bearing (7) includes: an inner ring (71), an outer ring (72), rolling elements (73), and a bearing housing (74); the outer ring (72) is fitted outside the inner ring (71), the rolling elements (73) are distributed between the outer ring (72) and the inner ring (71), and the bearing housing (74) is fixedly fitted outside the outer ring (72) to fix and support the sun gear (11).

6. A radar device, characterized in that, Includes a radar body and a dual-axis turntable as described in any one of claims 1 to 5, wherein the radar body is fixedly mounted on the product mounting assembly (4).

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