A pod device for aerial survey modeling UAV

Abstract

The present invention discloses a pod device for an aerial survey modeling UAV, which relates to the technical field of UAV pods, including a C-shaped frame, both sides of the bottom end of the C-shaped frame are fixed with vertical plates, a first rotating shaft is rotatably mounted on the outer wall of one side of the vertical plate, and a second rotating shaft is rotatably mounted on the outer wall of the vertical plate on the other side, a hollow tray is fixed between the first rotating shaft and the second rotating shaft, a pitch angle driving unit for driving the second rotating shaft is arranged on the outer wall of one side of the vertical plate, and an aluminum alloy rotating drum is installed on the hollow tray through a rotary driving assembly. The present invention not only reduces the impact of the UAV and the pod through the main leg shock absorbing assembly and the auxiliary leg shock absorbing assembly, avoids damage to the electrical components inside the pod body, and effectively prolongs the service life of the pod device, but also enables the pod body to obtain a multi-angle aerial survey shooting function, without the need to adjust the body posture of the UAV as a whole, and the adjustment is quick and convenient, which is convenient for the staff to perform aerial survey operations.

Description

Technical Field

[0001] The invention relates to the technical field of unmanned aerial vehicle pods, and in particular to a pod device for an aerial survey and modeling unmanned aerial vehicle. Background Art

[0002] Aerial survey modeling is a further application of UAVs. It combines radio remote control equipment or airborne computer remote control flight and other advanced technologies such as automatic photogrammetry and GPS automatic positioning to achieve rapid acquisition and synchronous processing of aerial remote sensing data. UAV aerial survey has the characteristics of fast aerial survey response capability, outstanding timeliness and cost-effectiveness, limited monitoring area, and fast ground data acquisition and modeling capabilities. The UAV pod integrates related electrical devices, cameras, lidar and other visual and position sensing components. Usually the pod is installed on the belly of the fuselage.

[0003] There are many types of such pod devices on the market today, which can basically meet people's usage needs, but there are still certain shortcomings. The existing pod devices of this type are installed on the belly of the drone. Since the pod is an external accessory, this results in the pod directly contacting the ground after the drone lands. During this process, the electrical components inside the pod are subject to a large impact from the landing. After the drone rises and falls for a long time, the internal components may be damaged, making it difficult to ensure the service life of the pod. Summary of the invention

[0004] The object of the present invention is to provide a pod device for an aerial survey and modeling UAV, so as to solve the problem in the above background technology that the pod device is an accessory and thus has a large impact on the landing during the landing process.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pod device for an aerial survey modeling drone, comprising a C-shaped frame, vertical plates are fixed on both sides of the bottom end of the C-shaped frame, a first rotating shaft is rotatably installed on the outer wall of one side of the vertical plate, and a second rotating shaft is rotatably installed on the outer wall of the vertical plate on the other side, a hollow tray is fixed between the first rotating shaft and the second rotating shaft, a pitch angle driving unit for driving the second rotating shaft is arranged on the outer wall of one side of the vertical plate, an aluminum alloy rotating drum is installed on the hollow tray through a rotary drive assembly, the bottom end of the aluminum alloy rotating drum penetrates to the outside of the hollow tray, a pod body is installed at the center position of the top end of the aluminum alloy rotating drum, a main leg shock absorbing assembly is arranged on the outer wall of one side of the vertical plate, and a secondary leg shock absorbing assembly is arranged on the outer wall of another group of the vertical plates, and the main leg shock absorbing assembly and the secondary leg shock absorbing assembly have the same structure;

[0006] The rotary drive assembly includes a circumferential drive unit and an outer diameter toothed disc, wherein the outer diameter toothed disc is fixed to the outer circumferential surface of the aluminum alloy rotating drum, and the inner diameter of the outer diameter toothed disc is equal to the outer diameter of the aluminum alloy rotating drum.

[0007] Preferably, two groups of U-shaped connecting frames are fixed to one side of the top of the C-shaped frame, the two groups of U-shaped connecting frames are symmetrical about the center line of the C-shaped frame, and the top of the U-shaped connecting frame is provided with multiple groups of internal threaded holes.

[0008] Preferably, the C-shaped frame and the vertical plate are both made of aluminum alloy.

[0009] Preferably, the main support leg shock absorbing assembly includes a right-angle limit frame installed on the outer wall of the vertical plate, a main connecting seat is fixed on the outer wall on one side of the right-angle limit frame, a secondary connecting seat is fixed on the outer wall of the right-angle limit frame below the main connecting seat, and a triangular connecting block is hinged inside the secondary connecting seat.

[0010] Preferably, a hydraulic strut is installed between the triangular connecting block and the main connecting seat via a hinge shaft, an aluminum alloy baffle ring is fixed to one end of the surface of the hydraulic strut and the bottom end of the piston rod, a return spring is installed between the two groups of the aluminum alloy baffle rings, and a connecting head is installed at the top of the triangular connecting block via a hinge shaft, and the top of the connecting head is fixedly connected to the top of the hydraulic strut piston rod.

[0011] Preferably, a leg body is fixed to one side of the top of the triangular connecting block, and a shock-absorbing pad is installed at the bottom end of the leg body.

[0012] Preferably, the pitch angle driving unit includes a fixing frame mounted on the outer wall of another set of vertical plates, a main motor is mounted on the outer wall of one side of the vertical plate, a driving shaft is mounted on the output end of the main motor, and a first gear is fixed on the surface of the driving shaft.

[0013] Preferably, a second gear is fixed to one end of the second rotating shaft, the second gear and the first gear are meshed with each other, and the diameter of the second gear is smaller than the diameter of the first gear.

[0014] Preferably, the internal threaded holes are arranged in at least three groups, and the multiple groups of internal threaded holes are distributed at equal intervals along the extension direction of the U-shaped connecting frame, and the U-shaped connecting frame is made of aluminum alloy.

[0015] Preferably, the circumferential drive unit includes a support plate installed on the outer wall of the hollow tray, a servo is installed on the top of the support plate, a direct-drive central shaft is installed on the output end of the servo via a coupling, a driving gear is fixed to the bottom end of the direct-drive central shaft, and the driving gear is meshed with the outer diameter gear disk.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the pod device for the aerial survey modeling UAV not only reduces the impact of the UAV and the pod through the main leg shock absorbing assembly and the auxiliary leg shock absorbing assembly, thereby avoiding damage to the electrical components inside the pod body and effectively extending the service life of the pod device, but also enables the pod body to obtain a multi-angle aerial survey shooting function, without the need to adjust the body posture of the UAV as a whole, and the adjustment is quick and convenient, which is convenient for the staff to perform aerial survey operations;

[0017] (1) By providing a structure that cooperates with the main leg shock-absorbing assembly and the auxiliary leg shock-absorbing assembly, the main leg shock-absorbing assembly and the auxiliary leg shock-absorbing assembly are used to perform shock-absorbing treatment on the pod device. During the landing process of the UAV and the pod, multiple groups of hydraulic struts and return springs are used to absorb energy and reduce shock. The leg body contacts the ground first, and the four groups of leg bodies form a four-point support structure, which reduces the landing impact on the vertical plate, the pod body and other components, avoids damage to the electrical components inside the pod body, and effectively extends the service life of the pod device;

[0018] (2) By providing a structure that cooperates with each other such as a pitch angle drive unit and a circumferential drive unit, the main motor drives the first gear and the second gear to rotate in sequence, and the second gear drives the second rotating shaft, the hollow tray and the first rotating shaft to rotate, thereby adjusting the pitch shooting angle of the pod body. The steering gear drives the direct drive center shaft, the driving gear and the outer diameter gear plate to rotate, and the outer diameter gear plate drives the aluminum alloy rotating drum and the pod body to rotate as a whole, thereby adjusting the aerial survey angle of the pod body in the horizontal axis. When the UAV is hovering, the pod body can rotate and pitch without adjusting the overall posture of the UAV. The adjustment is quick and convenient, which is convenient for the staff to perform aerial survey operations;

[0019] (3) By providing a U-shaped connecting frame and a vertical plate and other structures that cooperate with each other, the device is installed on the belly of the drone through the U-shaped connecting frame and positioning pins. The installation and disassembly are quick and convenient. In addition, the C-shaped frame, the vertical plate and the U-shaped connecting frame are made of aluminum alloy as a whole, which greatly reduces the weight of the device and effectively reduces the flight load of the drone. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0021] Figure 2 It is a side view structural schematic diagram of the present invention;

[0022] Figure 3 It is a schematic diagram of the enlarged structure of the pitch angle driving unit of the present invention;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the fixing frame of the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the main leg shock absorbing assembly after separation from the side of the present invention;

[0025] Figure 6 It is a schematic diagram of the main leg shock-absorbing assembly of the present invention after being separated and viewed from above;

[0026] Figure 7 For the present invention Figure 6 The enlarged structural diagram at A in the middle;

[0027] Figure 8 It is a schematic diagram of the three-dimensional structure of the U-shaped connecting frame of the present invention;

[0028] In the figure: 1, C-shaped frame; 2, vertical plate; 3, first rotating shaft; 4, hollow tray; 5, aluminum alloy rotating drum; 6, outer diameter gear plate; 7, pod body; 8, main leg shock absorbing assembly; 801, right angle limit frame; 802, main connecting seat; 803, aluminum alloy retaining ring; 804, hydraulic support rod; 805, connector; 806, return spring; 807, auxiliary connecting seat; 808, triangular connection block; 809, leg Main body; 9, pitch angle drive unit; 901, fixing frame; 902, main motor; 903, drive shaft; 904, first gear; 905, second rotating shaft; 906, second gear; 10, auxiliary outrigger shock absorbing assembly; 11, U-shaped connecting frame; 1101, internal threaded hole; 12, circumferential drive unit; 1201, support plate; 1202, servo; 1203, direct drive center shaft; 1204, driving gear. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1, by Figures 1 to 5 The present invention includes a C-shaped frame 1, and vertical plates 2 are fixed on both sides of the bottom end of the C-shaped frame 1. The C-shaped frame 1 and the vertical plates 2 are both made of aluminum alloy. A first rotating shaft 3 is rotatably installed on the outer wall of one side of the vertical plate 2, and a second rotating shaft 905 is rotatably installed on the outer wall of the vertical plate 2 on the other side. A hollow tray 4 is fixed between the first rotating shaft 3 and the second rotating shaft 905. A pitch angle driving unit 9 for driving the second rotating shaft 905 is arranged on the outer wall of one side of the vertical plate 2. The hollow tray 4 is installed with an aluminum alloy rotating drum 5 through a rotary drive assembly. The bottom end of the aluminum alloy rotating drum 5 penetrates to the outside of the hollow tray 4, and a pod body 7 is installed at the center position of the top of the aluminum alloy rotating drum 5. The rotary drive assembly includes a circumferential drive unit 12 and an outer diameter toothed disc 6. The outer diameter toothed disc 6 is fixed to the outer peripheral surface of the aluminum alloy rotating drum 5, and the inner diameter of the outer diameter toothed disc 6 is equal to the outer diameter of the aluminum alloy rotating drum 5.

[0031] A main leg shock absorbing assembly 8 is provided on the outer wall of one side of the vertical plate 2, and an auxiliary leg shock absorbing assembly 10 is provided on the outer wall of another set of vertical plates 2. The main leg shock absorbing assembly 8 and the auxiliary leg shock absorbing assembly 10 have the same structure. There are four sets of main leg shock absorbing assembly 8 and auxiliary leg shock absorbing assembly 10. When the UAV performs a landing action, the main leg shock absorbing assembly 8 and the auxiliary leg shock absorbing assembly 10 are used to perform shock absorption treatment on the pod device;

[0032] The main leg shock-absorbing assembly 8 comprises a right-angle limit frame 801 installed on the outer wall of the vertical plate 2, a main connecting seat 802 is fixed on the outer wall of one side of the right-angle limit frame 801, a secondary connecting seat 807 is fixed on the outer wall of the right-angle limit frame 801 below the main connecting seat 802, a triangular connecting block 808 is hinged inside the secondary connecting seat 807, a leg body 809 is fixed on one side of the top of the triangular connecting block 808, a shock-absorbing pad is installed at the bottom end of the leg body 809, the leg body 809 is first in contact with the ground, the leg body 809 plays a supporting role, and the shock-absorbing pad plays an anti-slip role;

[0033] A hydraulic support rod 804 is installed between the triangular connection block 808 and the main connection seat 802 through a hinge shaft. An aluminum alloy retaining ring 803 is fixed to one end of the surface of the hydraulic support rod 804 and the bottom end of the piston rod. A return spring 806 is installed between the two sets of aluminum alloy retaining rings 803. The two sets of aluminum alloy retaining rings 803 block and limit the hydraulic support rod 804.

[0034] The hydraulic support rod 804 and the return spring 806 play a shock-absorbing role, reducing the landing impact on the vertical plate 2, the pod body 7 and other components;

[0035] The top of the triangular connection block 808 is equipped with a connector 805 through a hinge axis. The auxiliary connector seat 807 and the main connector seat 802 are respectively the swing centers of the triangular connection block 808 and the hydraulic support rod 804. The top of the connector 805 is fixedly connected to the top of the piston rod of the hydraulic support rod 804. When the outrigger body 809 contacts the ground, the outrigger body 809 forces the triangular connection block 808 to flip upward, and then the hydraulic support rod 804 and the return spring 806 are in a compressed state.

[0036] The main leg shock absorbing assembly 8 and the auxiliary leg shock absorbing assembly 10 reduce the landing impact on the vertical plate 2, the pod body 7 and other components, avoid damage to the electrical components inside the pod body 7, and effectively extend the service life of the pod device.

[0037] Embodiment 2, based on embodiment 1, Figure 8It is shown that two sets of U-shaped connecting frames 11 are fixed on one side of the top of the C-shaped frame 1. The two sets of U-shaped connecting frames 11 are symmetrically structured about the center line of the C-shaped frame 1. The top of the U-shaped connecting frame 11 is provided with multiple sets of internal threaded holes 1101. The pod device is installed to the belly of the drone through the U-shaped connecting frame 11.

[0038] The internal threaded holes 1101 are at least three groups, and the multiple groups of internal threaded holes 1101 are evenly spaced along the extension direction of the U-shaped connecting frame 11. The multiple internal threaded holes 1101 improve the installation stability of the U-shaped connecting frame 11. The U-shaped connecting frame 11 is made of aluminum alloy. Through the cooperation of the internal threaded holes 1101 at the top of the U-shaped connecting frame 11 and the positioning pins, the device can be installed on the belly of the drone, and the installation is quick and convenient.

[0039] The C-shaped frame 1, the vertical plate 2, the U-shaped connecting frame 11, the aluminum alloy rotating drum 5 and other components are made of aluminum alloy as a whole, which can reduce the flight load of the UAV.

[0040] Embodiment 2, based on embodiment 1, Figures 1 to 7 It is given that the circumferential drive unit 12 includes a support plate 1201 installed on the outer wall of the hollow tray 4, a steering gear 1202 is installed on the top of the support plate 1201, and a direct drive shaft 1203 is installed on the output end of the steering gear 1202 through a coupling, and a driving gear 1204 is fixed to the bottom end of the direct drive shaft 1203, and the driving gear 1204 is meshed with the outer diameter gear plate 6. The direct drive shaft 1203, the driving gear 1204 and the outer diameter gear plate 6 are driven to rotate by the steering gear 1202. Since the outer diameter gear plate 6 is fixed on the outer peripheral surface of the aluminum alloy rotating drum 5, the outer diameter gear plate 6 drives the aluminum alloy rotating drum 5 and the pod body 7 to rotate as a whole, so as to adjust the aerial survey angle of the pod body 7 in the horizontal axis;

[0041] The pitch angle driving unit 9 includes a fixing frame 901 installed on the outer wall of another set of vertical plates 2, a main motor 902 is installed on the outer wall of one side of the vertical plate 2, a driving shaft 903 is installed at the output end of the main motor 902, a first gear 904 is fixed on the surface of the driving shaft 903, and a second gear 906 is fixed at one end of the second rotating shaft 905. During the drone aerial survey, the staff turns on the main motor 902 through the remote control end, and the main motor 902 drives the driving shaft 903, the first gear 904 and the second gear 906 to rotate in turn;

[0042] The second gear 906 and the first gear 904 mesh with each other. The diameter of the second gear 906 is smaller than that of the first gear 904. The second gear 906 drives the second rotating shaft 905, the hollow tray 4 and the first rotating shaft 3 to rotate, that is, to adjust the pitch shooting angle of the pod body 7;

[0043] By adjusting the aerial survey angle and pitch shooting angle of the pod body 7 on the horizontal axis, the pod body 7 can obtain multi-angle aerial survey functions when the UAV is in a hovering state. There is no need to adjust the overall posture of the UAV body. The adjustment is quick and convenient, which is convenient for the staff to perform aerial survey operations.

[0044] When the embodiment of the present application is in use, first, the staff installs the pod device to the belly of the drone through the U-shaped connecting frame 11. When the drone performs a landing action, the main leg shock-absorbing assembly 8 and the auxiliary leg shock-absorbing assembly 10 are used to perform shock-absorbing treatment on the pod device. Taking the main leg shock-absorbing assembly 8 as an example, the leg body 809 contacts the ground first, and then the leg body 809 forces the triangular connecting block 808 to flip upward, and then the hydraulic support rod 804 and the return spring 806 are in a compressed state. In this process, two sets of aluminum alloy retaining rings 803 block and limit the hydraulic support rod 804, and the auxiliary connecting seat 807 and the main connecting seat 802 are respectively the swinging centers of the triangular connecting block 808 and the hydraulic support rod 804, so that the shock-absorbing effect of the hydraulic support rod 804 and the return spring 806 can reduce the landing impact of the vertical plate 2, the pod body 7 and other components, avoid damage to the electrical components inside the pod body 7, and effectively delay the landing. Long service life of the pod device. During the aerial survey of the UAV, the staff starts the main motor 902 through the remote control end, and the main motor 902 drives the driving shaft 903, the first gear 904 and the second gear 906 to rotate in sequence. The second gear 906 drives the second rotating shaft 905, the hollow tray 4 and the first rotating shaft 3 to rotate, that is, the pitch shooting angle of the pod body 7 is adjusted. The direct drive middle shaft 1203, the driving gear 1204 and the outer diameter gear plate 6 are driven to rotate by the steering gear 1202. Since the outer diameter gear plate 6 is fixed on the outer peripheral surface of the aluminum alloy rotating drum 5, the outer diameter gear plate 6 drives the aluminum alloy rotating drum 5 and the pod body 7 to rotate as a whole, thereby adjusting the aerial survey angle of the pod body 7 on the horizontal axis. When the UAV is in a hovering state, the pod body 7 can obtain a multi-angle aerial survey function without adjusting the overall posture of the UAV. The adjustment is quick and convenient, which is convenient for the staff to perform aerial survey operations.

[0045] The device can be installed on the belly of the drone through the cooperation of the internal threaded hole 1101 at the top of the U-shaped connecting frame 11 and the positioning pin. The installation is quick and convenient. The C-shaped frame 1 and the vertical plate 2 are made of aluminum alloy, which can reduce the flight load of the drone.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pod device for an aerial survey modeling drone, characterized in that: The invention comprises a C-shaped frame (1), wherein both sides of the bottom end of the C-shaped frame (1) are fixed with vertical plates (2), a first rotating shaft (3) is rotatably mounted on the outer wall of one side of the vertical plate (2), and a second rotating shaft (905) is rotatably mounted on the outer wall of the vertical plate (2) on the other side, a hollow tray (4) is fixed between the first rotating shaft (3) and the second rotating shaft (905), a pitch angle driving unit (9) for driving the second rotating shaft (905) is arranged on the outer wall of one side of the vertical plate (2), and the hollow tray (4) is fixed between the first rotating shaft (3) and the second rotating shaft (905). The tray (4) is equipped with an aluminum alloy rotating drum (5) through a rotary drive assembly, the bottom end of the aluminum alloy rotating drum (5) penetrates to the outside of the hollow tray (4), a pod body (7) is installed at the center position of the top of the aluminum alloy rotating drum (5), a main leg shock absorbing assembly (8) is arranged on the outer wall of one side of the vertical plate (2), and a secondary leg shock absorbing assembly (10) is arranged on the outer wall of another group of the vertical plates (2), and the main leg shock absorbing assembly (8) and the secondary leg shock absorbing assembly (10) have the same structure; The rotary drive assembly comprises a circumferential drive unit (12) and an outer diameter toothed disc (6), wherein the outer diameter toothed disc (6) is fixed to the outer peripheral surface of the aluminum alloy rotating cylinder (5), and the inner diameter of the outer diameter toothed disc (6) is equal to the outer diameter of the aluminum alloy rotating cylinder (5); The main support leg shock absorbing assembly (8) comprises a right-angle limit frame (801) mounted on the outer wall of the vertical plate (2); a main connecting seat (802) is fixed on the outer wall of one side of the right-angle limit frame (801); a secondary connecting seat (807) is fixed on the outer wall of the right-angle limit frame (801) below the main connecting seat (802); a triangular connecting block (808) is hinged inside the secondary connecting seat (807); a hydraulic support rod (804) is installed between the triangular connecting block (808) and the main connecting seat (802) via a hinge shaft. An aluminum alloy retaining ring (803) is fixed to one end of the surface of the hydraulic strut (804) and the bottom end of the piston rod, a return spring (806) is installed between the two groups of the aluminum alloy retaining rings (803), a connecting head (805) is installed at the top of the triangular connecting block (808) through a hinge shaft, and the top of the connecting head (805) is fixedly connected to the top of the piston rod of the hydraulic strut (804); a support leg body (809) is fixed to one side of the top of the triangular connecting block (808), and a shock-absorbing pad is installed at the bottom end of the support leg body (809).

2. The pod device for an aerial survey modeling UAV according to claim 1, characterized in that: Two groups of U-shaped connecting frames (11) are fixed to one side of the top of the C-shaped frame (1), the two groups of U-shaped connecting frames (11) are symmetrically structured about the center line of the C-shaped frame (1), and the top of the U-shaped connecting frame (11) is provided with a plurality of groups of internal threaded holes (1101).

3. The pod device for an aerial survey modeling UAV according to claim 1, characterized in that: The C-shaped frame (1) and the vertical plate (2) are both made of aluminum alloy.

4. The pod device for an aerial survey modeling UAV according to claim 1, characterized in that: The pitch angle driving unit (9) comprises a fixing frame (901) mounted on the outer wall of another set of vertical plates (2); a main motor (902) is mounted on the outer wall of one side of the vertical plate (2); a driving shaft (903) is mounted on the output end of the main motor (902); and a first gear (904) is fixed on the surface of the driving shaft (903).

5. The pod device for an aerial survey modeling UAV according to claim 4, characterized in that: A second gear (906) is fixed to one end of the second rotating shaft (905), the second gear (906) and the first gear (904) are meshed with each other, and the diameter of the second gear (906) is smaller than the diameter of the first gear (904).

6. The pod device for an aerial survey modeling UAV according to claim 2, characterized in that: The internal threaded holes (1101) are arranged in at least three groups, and the multiple groups of internal threaded holes (1101) are distributed at equal intervals along the extension direction of the U-shaped connecting frame (11), and the U-shaped connecting frame (11) is made of aluminum alloy.

7. The pod device for an aerial survey modeling UAV according to claim 1, characterized in that: The circumferential drive unit (12) comprises a support plate (1201) mounted on the outer wall of the hollow tray (4); a steering gear (1202) is mounted on the top of the support plate (1201); a direct drive center shaft (1203) is mounted on the output end of the steering gear (1202) via a coupling; a driving gear (1204) is fixed to the bottom end of the direct drive center shaft (1203); and the driving gear (1204) is meshed with an outer diameter toothed disc (6).

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