Compact high-precision universal rotary table

Abstract

The invention provides a compact high-precision universal rotary table, and relates to the technical field of rotary tables. The rotary table comprises a rotary table base, a main shaft, a direct driving force mechanism and a rotary transformer, wherein the rotary table base is of a cylinder structure; the main shaft is vertically arranged in the rotary table base and is rotationally connected with the rotary table base, and the top end of the main shaft extends out of the rotary table base and is used for mounting a load; the direct driving force mechanism is arranged in the rotary table base and is in transmission connection with the main shaft; the rotary transformer comprises a rotary transformer stator and a rotary transformer rotor, the rotary transformer rotor is arranged on the main shaft, and the rotary transformer stator is arranged in the rotary table base. The device is compact in structure, high in transmission precision, high in anti-overturning capacity, good in universality and high in safety.

Description

Technical Field

[0001] The invention relates to the technical field of turntables, and in particular to a compact high-precision universal turntable. Background Art

[0002] The turntable is an important component of the rotation-driven radar system. It supports and orients the radar antenna. Through the servo control system, the antenna load moves according to the preset program and feeds back the turntable rotation angle information to the control system in real time. The control system completes further action control according to the feedback information and related requirements.

[0003] With the advancement of technology, the requirements for lightweight and integration of the whole machine system are constantly increasing, which undoubtedly puts forward more stringent requirements on the overall design of the whole machine structure. As a supporting and auxiliary carrier of the whole machine, the turntable must not only realize the predetermined functions, but also strictly control its own weight and size proportion in the whole machine system. Therefore, under the premise of ensuring high transmission accuracy, a compact structure design is imperative.

[0004] Although the existing radar antenna turntable can meet the functional design requirements, the weight or volume indicators cannot be met. The shortcomings of the existing radar antenna turntable are:

[0005] (1) When selecting the turntable drive motor, a direct drive motor design was selected because the servo control system of the whole machine has high requirements for the backlash of the transmission device. However, the internal space of the direct drive motor was not reasonably utilized, resulting in an overall structural layout that was not compact and causing space waste.

[0006] (2) When the turntable direct-drive motor is in continuous operation, a high amount of heat will be generated. If active measures are not taken to dissipate the heat in time, serious consequences will occur. Most turntable internal structures are not designed with active heat dissipation in mind or the heat dissipation effect is poor, resulting in a decrease in the efficiency of the direct-drive motor or overheating and damage.

[0007] (3) In terms of the platform versatility of the turntable, many turntables are designed to be installed only on static platforms, and fail to fully consider installation on dynamic platforms with complex motion conditions. Summary of the invention

[0008] In order to address the deficiencies in the background technology, the present invention provides a compact and high-precision universal turntable, which cleverly forms a "nested" structure with a direct-drive motor, a resolver, a busbar, and a main shaft, greatly reducing the axial size, having a compact structure, and improving the stability of the turntable.

[0009] The object of the present invention is to provide a compact high-precision universal turntable, comprising:

[0010] The turntable base is a cylindrical structure;

[0011] A main shaft is vertically arranged in the turntable base and rotatably connected to the turntable base, and the top end of the main shaft extends outside the turntable base for mounting a load;

[0012] A direct drive mechanism is disposed in the turntable base and is drivingly connected to the main shaft;

[0013] The resolver comprises a resolver stator and a resolver rotor, wherein the resolver rotor is arranged on the main shaft, and the resolver stator is arranged in the turntable base.

[0014] Preferably, it also includes a busbar, which is arranged through the main shaft; the busbar includes a stator part and a rotor part, the stator part is connected to the bottom of the turntable base through a support frame, and the top of the rotor part is connected to the top of the main shaft through a fork plate.

[0015] Preferably, a plurality of dry cooling windows are evenly distributed along the circumferential direction on the side wall of the turntable base, and each of the dry cooling windows comprises: an axial flow fan assembly, which is arranged on the inner wall of the turntable base;

[0016] The fan protection cover is arranged on the outer side of the turntable base and is arranged corresponding to the axial flow fan combination.

[0017] Preferably, it also includes:

[0018] A reducer is arranged in the turntable base and is drivingly connected to the main shaft;

[0019] The brake is arranged in the turntable base and is transmission-connected with the reducer.

[0020] Preferably, a rearward maintenance window is provided on the side wall of the turntable base corresponding to the reducer.

[0021] Preferably, the upper end of the main shaft is rotatably connected to the turntable base through a main bearing; the lower end of the main shaft is rotatably connected to the turntable base through an auxiliary bearing;

[0022] The turntable base is also provided with a main bearing gland for pressing the outer ring of the main bearing;

[0023] The top cover of the turntable base is provided with a gear protection cover, and the gear protection cover is provided with a through hole for the main shaft to pass through;

[0024] An oil seal is arranged between the main shaft and the gear protection cover, wherein an oil seal baffle is arranged on the gear protection cover.

[0025] Preferably, the direct drive power mechanism is a direct drive motor, comprising a motor rotor and a motor stator;

[0026] The motor rotor is sleeved on the main shaft;

[0027] The motor stator is arranged in the turntable base.

[0028] Preferably, a support plate is provided at the bottom of the turntable base;

[0029] The rotary transformer rotor is arranged on the main shaft below the motor rotor;

[0030] The support plate is provided with a resolver support seat for mounting the resolver stator.

[0031] Preferably, the turntable base is further provided with an attitude instrument assembly, which is composed of an attitude instrument seat and an attitude instrument;

[0032] The outer side of the turntable base is also provided with a socket board assembly and a terminal block assembly for laying cables inside the turntable.

[0033] Preferably, the main shaft is provided with a locking nut below the main bearing;

[0034] The bottom of the turntable base is also provided with a hollow bottom cover.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] The present invention provides a compact high-precision universal turntable, which has a compact structure, high transmission accuracy and good stability. The direct-drive motor, the resolver and the main shaft are all hollow structures, wherein the direct-drive motor and the resolver are both mounted on the outer circle of the main shaft, the rotor part is fixedly connected to the main shaft and can rotate with the main shaft, and the stator part is fixedly connected to the turntable base in a direct or transitional form. The busbar is arranged through the inner hole of the main shaft, and its stator flange is fixedly connected to the lower busbar support frame, and its rotor cooperates with the main shaft by a fork plate and can rotate with the main shaft. The direct-drive motor, the resolver, the busbar and the main shaft cleverly form a "nested" structure, which greatly reduces the axial size, has a compact structure, and improves the stability of the turntable. In addition, the direct-drive motor and the resolver make full use of the height space between the main bearing and the auxiliary bearing for installation, and try to increase the span between the two bearings to improve the turntable's anti-overturning ability. Moreover, this type of direct-drive motor driving form has no backlash effect and high transmission accuracy.

[0037] The turntable provided by the present invention has strong environmental adaptability. The turntable base is evenly designed with a number of cooling windows in the circumferential direction, and an axial flow fan assembly is installed in the upper space of each cooling window. At the same time, a fan protection cover is installed at the corresponding position of the window, and a hollow bottom cover is installed at the bottom of the turntable base. The hollow bottom cover is the turntable air inlet, and a number of radially evenly distributed axial flow fans are combined as the turntable air outlet, which draws air upward to dissipate the heat generated by the direct drive motor in the continuous operation condition, effectively improving the environmental adaptability of the turntable.

[0038] The turntable provided by the present invention has good versatility and high safety. The attitude instrument combination is embedded in the lower space of the rear maintenance window of the turntable base, ensuring that the turntable can be applied to a variety of dynamic and static platforms, effectively improving the versatility of the turntable. In addition, the large and small brake gears form a brake gear pair, which realizes the side transmission braking of the turntable with the reducer and the brake, effectively improving the operation safety of the turntable. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a longitudinal section schematic diagram of the compact high-precision universal turntable structure layout;

[0040] Figure 2 It is a cross-sectional schematic diagram of the compact high-precision universal turntable structure layout;

[0041] Figure 3 This is a schematic diagram of the appearance and structure of a compact high-precision universal turntable;

[0042] Figure 4 This is the front view of the compact high-precision universal rotary table;

[0043] Figure 5 This is the rear view of the compact high-precision universal rotary table;

[0044] Figure 6 Bottom view of a compact, high-precision universal turntable;

[0045] Figure 7 It is an exploded schematic diagram of the compact high-precision universal turntable structure;

[0046] Figure 8 Schematic diagram of the turntable base of a compact high-precision universal turntable (I);

[0047] Fig. 9 Schematic diagram of the turntable base of a compact high-precision universal turntable (II).

[0048] Among them, turntable base 1, gear protection cover 2, oil seal baffle 3, oil seal 4, main shaft 5, fork plate 6, busbar 7, main bearing 8, main bearing pressure cover 9, gear bracket 10, large brake gear 11, small brake gear 12, reducer seat 13, reducer 14, brake 15, locking nut 16, direct drive motor 17, attitude instrument assembly 18, attitude instrument seat 18-1, attitude instrument 18-2, support plate 19, hollow bottom cover 20, busbar support frame 21, auxiliary bearing 22, bearing sleeve 23, resolver support seat 24, resolver 25, socket board assembly 26, axial flow fan assembly 27, fan protection cover 28, terminal block assembly 29, maintenance window cover 30, cooling window lower cover 31. DETAILED DESCRIPTION

[0049] Several specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0050] The purpose of the present invention is to provide a compact high-precision universal turntable. Figures 1 to 9 As shown, it includes a turntable base 1, a spindle 5, a direct drive mechanism and a resolver 25:

[0051] The turntable base 1 is a cylindrical structure; the spindle 5 is vertically arranged in the turntable base 1 and is rotatably connected with the turntable base 1, and the top of the spindle 5 extends to the outside of the turntable base 1 for the installation of the load; the direct drive power mechanism is arranged in the turntable base 1 and is transmission-connected with the spindle 5; the resolver 25 includes a resolver stator and a resolver rotor, the resolver rotor is arranged on the spindle 5, and the resolver stator is arranged in the turntable base 1. It should be noted that the direct drive power mechanism is a direct drive motor.

[0052] The present invention mainly includes a frame-type turntable base for supporting and installing turntable structural parts, a direct-drive motor and a main shaft for transmitting power, and a resolver for outputting angle signals, wherein the direct-drive motor and the resolver are both mounted on the outer circle of the main shaft, the rotor part is fixedly connected to the main shaft and can rotate with the main shaft, and the stator part is fixedly connected to the turntable base in a direct or transitional form. The direct-drive motor and the resolver make full use of the height space between the main bearing and the auxiliary bearing for installation, and the span between the two bearings is increased as much as possible, thereby improving the turntable's anti-overturning ability, and this type of direct-drive motor driving form has no backlash effect and high transmission accuracy.

[0053] The present invention also includes a busbar 7, which is arranged through the main shaft 5; the busbar 7 includes a stator part and a rotor part, the stator part is connected to the bottom of the turntable base 1 through a support frame 21, and the top of the rotor part is connected to the top of the main shaft 5 through a fork plate 6.

[0054] The busbar is arranged through the inner hole of the main shaft, and the stator flange of the busbar is fixedly connected to the busbar support frame at the bottom. The rotor of the busbar cooperates with the main shaft through the fork plate and can rotate with the main shaft. It can be seen that the direct drive motor, resolver, busbar and main shaft cleverly form a "nested" structure, which greatly reduces the axial size, has a compact structure, and improves the stability of the turntable.

[0055] In order to quickly dissipate the internal heat when the turntable base is in operation, a plurality of dry cooling windows are evenly distributed along the circumference on the side wall of the turntable base 1, and each dry cooling window includes: an axial flow fan assembly 27, which is arranged on the inner wall of the turntable base 1; a fan protection cover 28, which is arranged on the outer side of the turntable base 1 and is arranged corresponding to the axial flow fan assembly 27. To this end, the heat inside the base is transferred to the outside through the axial flow fan assembly, wherein the axial flow fan assembly is composed of a plurality of exhaust fans. In order to dissipate heat as much as possible, a hollow bottom cover 20 is also provided at the bottom of the turntable base 1.

[0056] The present invention further includes a reducer 14 and a brake 15; the reducer 14 is arranged in the turntable base 1 and is in driving connection with the main shaft 5; the brake 15 is arranged in the turntable base 1 and is in driving connection with the reducer 14. The reducer 14 and the brake 15 realize the side transmission braking of the turntable, thereby improving the operation safety of the turntable.

[0057] A rearward maintenance window is provided on the turntable base 1 on the sidewall corresponding to the speed reducer 14. For this reason, the maintenance window is convenient for the inspection and repair of the brake and the speed reducer.

[0058] In order to realize the rotation of the main shaft, the upper end of the main shaft 5 is rotatably connected to the turntable base 1 through the main bearing 8; the lower end of the main shaft 5 is rotatably connected to the turntable base 1 through the auxiliary bearing 22;

[0059] A main bearing pressure cover 9 for pressing the outer ring of the main bearing 8 is also provided on the turntable base 1; a gear protection cover 2 is provided on the top cover of the turntable base 1, and a through hole for the main shaft 5 to pass through is opened on the gear protection cover 2; an oil seal 4 is provided between the main shaft 5 and the gear protection cover 2, and an oil seal baffle 3 is provided on the gear protection cover 2.

[0060] It should be noted that the axis of the main shaft and the turntable base are the same axis, the main shaft is vertically arranged in the turntable base, and the main shaft is rotatably connected to the turntable base through the bearing, thereby realizing the rotation of the main shaft. The oil seal can effectively prevent oil and dust from entering.

[0061] In order to realize the transmission of the main shaft by the direct driving force mechanism, the direct driving force mechanism is a direct driving motor 7, including a motor rotor and a motor stator; the motor rotor is sleeved on the main shaft 8; the motor stator is arranged in the turntable base 1. Among them, the main shaft 5 is provided with a locking nut 16 below the main bearing 8.

[0062] A support plate 19 is provided at the bottom of the turntable base 1; the resolver rotor is provided on the main shaft 5 located below the motor rotor; and the support plate 19 is provided with a resolver support seat 24 for mounting the resolver stator.

[0063] In the present invention, a posture instrument assembly 18 is also arranged inside the turntable base 1, which is composed of a posture instrument seat 18-1 and a posture instrument 18-2; the turntable can be applied to a variety of dynamic and static platforms, effectively improving the versatility of the turntable. A socket board assembly 26 and a wiring row assembly 29 are also arranged outside the turntable base 1 for laying cables inside the turntable.

[0064] It can be seen that the compact high-precision universal turntable provided by the present invention mainly includes a frame-type turntable base for supporting and installing the turntable structural parts, a direct-drive motor and a main shaft for transmitting power, a resolver for outputting angle signals, a main bearing and an auxiliary bearing for bearing loads, a busbar for transmitting signals, a combination of several axial flow fans for heat dissipation during turntable operation, a brake gear pair and a reducer, a brake and other structural parts to ensure the safety of turntable transportation. It is characterized by:

[0065] The turntable base adopts a thin-walled multi-rib frame structure as the basis for the support and installation of the entire turntable. The main shaft is fixed in the turntable base through the main bearing and auxiliary bearing, and is tightened with a locking nut. The direct-drive motor is a hollow structure. The motor rotor is mounted on the outer circle of the main shaft in the form of a stopper and a flange, and can rotate with the main shaft. The motor stator is fixedly connected to the turntable base in the form of a stopper and a flange. The resolver is also a hollow structure. The resolver rotor is mounted on the outer circle of the main shaft using a number of positioning pins and a main shaft step. It is located at the bottom of the direct-drive motor and can rotate with the main shaft. The resolver stator is fixedly connected to the support plate using a resolver support seat. The main shaft is also a thin-walled hollow structure. The busbar is arranged through the inner hole of the main shaft. Its stator flange is fixedly connected to the lower busbar support frame using a stopper. Its rotor is matched with the flange at the inner hole of the main shaft using a fork plate, and can rotate with the main shaft. The direct-drive motor, resolver, busbar and main shaft cleverly form a "nested" structure, which greatly reduces the axial dimension and improves the stability of the turntable.

[0066] The turntable base is evenly designed with several cooling windows in the circumferential direction and maintenance windows in the tail direction. The windows are evenly divided into upper and lower spaces. Axial flow fan combinations are installed in the upper space of the cooling windows, and fan protection covers are installed at the corresponding positions of the windows. A hollow bottom cover is installed at the bottom of the turntable base. The hollow bottom cover is the turntable air inlet, and several radially evenly distributed axial flow fans are combined as the turntable air outlet. The air is drawn upward to dissipate the heat generated by the direct-drive motor in continuous operation, effectively improving the environmental adaptability of the turntable.

[0067] The lower space of the cooling window of the turntable base is installed with a wiring block assembly and a socket board assembly for laying cables inside the turntable. The upper space of the tail maintenance window corresponds to the brake and reducer, which is used for the disassembly and maintenance of these parts. The lower space is embedded with an attitude instrument assembly to ensure that the turntable can be applied to a variety of dynamic and static platforms, effectively improving the versatility of the turntable.

[0068] The large brake gear is fixedly connected to the lower edge of the main shaft flange by a gear bracket, the small brake gear is installed on the upper output shaft of the reducer, and the brake is installed on the lower output shaft of the reducer. Together, they are fixedly connected to the top of the turntable base through the reducer base. The large and small brake gears form a brake gear pair, which realizes the side-transmission braking of the turntable together with the reducer and brake, effectively improving the operation safety of the turntable.

[0069] To further illustrate the compact high-precision universal turntable provided by the present invention, see Figures 1 to 9 As shown, it includes: a frame-type turntable base 1 for supporting and installing the turntable structural parts, a direct drive motor 17 for transmitting power, a main shaft 5, a resolver 25 for outputting angle signals, a main bearing 8 and an auxiliary bearing 22 for carrying loads, a confluence column 7 for transmitting signals, a plurality of axial flow fan assemblies 27 for heat dissipation during turntable operation, a brake gear pair and a reducer 14, a brake 15 and other structural parts to ensure the safety of turntable transportation. The turntable base 1 is the basis for supporting and installing the entire turntable. It is a thin-walled multi-rib frame structure. Its mounting flange is located at the upper part of the base and is used for embedding on the equipment platform. The main bearing 8 is installed on the upper part of the turntable base 1 by means of the main bearing cover 9, the support plate 19 is fixedly connected to the lower part of the turntable base 1 by means of a stopper and a flange, the bearing sleeve 23 is also fixedly connected to the center hole of the support plate 19 by means of a stopper and a flange, and the auxiliary bearing 22 is pressed in the bearing sleeve 23 by means of a busbar support frame 21; the main shaft 5 is fixed in the turntable base 1 by means of the main bearing 8 and the auxiliary bearing 22, and is pressed by means of a locking nut 16, and a step mating surface is designed on the top of the main shaft 5 for load installation.

[0070] The direct-drive motor 17 is a hollow structure, and its stator and rotor are installed separately. The motor rotor is mounted on the outer circle of the main shaft 8 in the form of a stop and a flange, and can rotate with the main shaft 8. The motor stator is also fixedly connected to the turntable base 1 in the form of a stop and a flange. This type of motor drive is not affected by transmission backlash and has high precision. The resolver 25 is also a hollow structure, and its stator and rotor are also installed separately. The resolver 25 rotor is mounted on the outer circle of the main shaft 5 using a number of positioning pins and the steps of the main shaft 5, and is located at the bottom of the direct-drive motor 17. It can rotate with the main shaft 5, and the resolver 25 stator is fixedly connected to the support plate 19 using the resolver support seat 24. The direct-drive motor 17 and the resolver 25 are installed by making full use of the height space between the main bearing 8 and the auxiliary bearing 22, and the span between the two bearings is increased as much as possible to improve the turntable's anti-overturning ability. The main shaft 5 is a thin-walled hollow structure, and the busbar 7 is arranged through the inner hole of the main shaft 5. Its stator flange is fixedly connected to the lower busbar support frame 21 by using a stopper. Its rotor is matched with the flange at the inner hole of the main shaft 5 by using a fork plate 6, and can rotate with the main shaft 5.

[0071] At this point, the direct drive motor 17, the resolver 25, the main shaft 5, and the busbar 7 cleverly form a "nested" structure, which greatly reduces the axial dimension and improves the stability of the turntable.

[0072] The turntable base 1 is evenly designed with several cooling windows in the circumferential direction and maintenance windows in the tail direction. The windows are evenly divided into upper and lower spaces. The upper space of the cooling windows is installed with axial flow fan assemblies 27, and fan protection covers 28 are installed at the corresponding positions of the windows. The bottom of the turntable base 1 is installed with a hollow bottom cover 20. The hollow bottom cover 20 is the turntable air inlet, and several radially evenly distributed axial flow fan assemblies 27 are the turntable air outlets. The air is drawn upward to dissipate the heat generated by the direct drive motor 17 in the continuous operation condition, thereby improving the environmental adaptability of the turntable. The lower space of the cooling window is installed with a socket board assembly 26 and a terminal block assembly 29 for laying cables inside the turntable. The upper space of the tail maintenance window corresponds to the reducer 14 and the brake 15, which is convenient for the disassembly and maintenance of these parts. The lower space is embedded with an attitude instrument assembly 18, which consists of an attitude instrument seat 18-1 and an attitude instrument 18-2, to ensure that the turntable can be applied to a variety of dynamic and static platforms, effectively improving the versatility of the turntable. An inspection hole is provided on the side of the turntable base 1 corresponding to the embedded attitude instrument assembly 18, and a maintenance window cover plate 30 for easy maintenance is provided thereon. Among them, a cooling window lower cover plate 31 is provided on the side of the turntable base 1 at the lower part of the axial flow fan assembly 27.

[0073] A wiring row assembly is arranged below each axial flow fan assembly, and corresponding holes are arranged on the corresponding turntable base. A socket board assembly 26 is installed in the lower space of one cooling window, and a cooling window lower cover 31 is arranged in the lower space of other cooling windows.

[0074] The large brake gear 11 is fixedly connected to the lower edge of the main shaft 5 flange by the gear bracket 10, the small brake gear 12 is installed on the output shaft of the reducer 14, and the brake 15 is installed on the lower output shaft of the reducer 14. Together, they are fixedly connected to the top of the turntable base 1 through the reducer seat 13. The large and small brake gears form a brake gear pair, which realizes the side transmission braking of the turntable with the reducer 14 and the brake 15, thereby improving the operation safety of the turntable. The gear protection cover 2 is fixedly connected to the top of the turntable base 1 by means of a stopper and a flange. The oil seal 4 is installed in the center hole by means of an oil seal baffle 3. The oil seal 4 forms a dynamic seal with the flange of the main shaft 5, which can effectively prevent the entry of oil and dust, and protect the meshing transmission safety of the gear pair. It should be noted that the flange of the main shaft 5 refers to a flange provided at the upper end of the main shaft for mounting a load.

[0075] In summary, the present invention provides a compact, high-precision universal turntable, which mainly includes a frame-type turntable base for supporting and installing turntable structural parts, a direct-drive motor and a main shaft for transmitting power, a resolver for outputting angle signals, a main bearing and an auxiliary bearing for bearing loads, a busbar for transmitting load signals, a plurality of groups of axial flow fan combinations for heat dissipation during turntable operation, a brake gear pair and a reducer, a brake and other structural parts to ensure the safety of the turntable stopping. Among them, the direct-drive motor and the resolver are both hollow structures, with the stator parts of both fixedly connected to the turntable base and the rotor parts mounted on the main shaft; the main shaft is also a hollow structure, with the manifold arranged inside the main shaft, the stator part fixedly connected to the support plate at the bottom of the turntable, and the rotor part using a fork plate to form a "fork" connection with the main shaft. As the main shaft rotates, the manifold, the main shaft, the direct-drive motor and the resolver cleverly form a "nested" structure, which greatly reduces the axial dimension and improves the stability of the turntable; the hollow bottom cover is the air inlet, and a number of radially evenly distributed axial flow fans are combined as the air outlet, which draws air upward to dissipate the heat generated when the turntable is working, effectively solving the heat dissipation problem of the direct-drive motor under continuous operation conditions and improving the environmental adaptability of the turntable; the brake gear pair, the reducer and the brake effectively realize side-by-side braking to improve the safety of the turntable when it stops; the attitude instrument module is embedded in the rear of the turntable base to ensure that the turntable can be installed on dynamic and static platforms, effectively improving the versatility of the turntable. The invention has the advantages of compact structure, high transmission precision, strong anti-overturning ability, good versatility and high safety.

[0076] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A compact high-precision universal turntable, characterized in that: include: A turntable base (1) having a cylindrical structure; A main shaft (5) is vertically arranged in the turntable base (1) and is rotatably connected to the turntable base (1), and the top end of the main shaft (5) extends outside the turntable base (1) for mounting a load; A direct drive mechanism is arranged in the turntable base (1) and is drivingly connected to the main shaft (5); The resolver (25) comprises a resolver stator and a resolver rotor, wherein the resolver rotor is arranged on the main shaft (5), and the resolver stator is arranged in the turntable base (1).

2. The compact high-precision universal turntable according to claim 1, characterized in that: It also includes a busbar (7) which is disposed through the main shaft (5); The busbar (7) comprises a stator part and a rotor part, wherein the stator part is connected to the bottom of the turntable base (1) via a support frame (21), and the top of the rotor part is connected to the top of the main shaft (5) via a fork plate (6).

3. The compact high-precision universal turntable according to claim 1, characterized in that: A plurality of dry cooling windows are evenly distributed along the circumference on the side wall of the turntable base (1), each of the dry cooling windows comprising: An axial flow fan assembly (27) is arranged on the inner wall of the turntable base (1); A fan protection cover (28) is arranged outside the turntable base (1) and is arranged corresponding to the axial flow fan assembly (27).

4. The compact high-precision universal turntable according to claim 1, characterized in that: Also includes: A speed reducer (14) is arranged in the turntable base (1) and is drivingly connected to the main shaft (5); The brake (15) is arranged in the turntable base (1) and is transmission-connected to the reducer (14).

5. The compact high-precision universal turntable according to claim 4, characterized in that: The turntable base (1) is provided with a rearward maintenance window on a side wall corresponding to the reducer (14).

6. The compact high-precision universal turntable according to claim 1, characterized in that: The upper end of the main shaft (5) is rotatably connected to the turntable base (1) via a main bearing (8); the lower end of the main shaft (5) is rotatably connected to the turntable base (1) via an auxiliary bearing (22); The turntable base (1) is also provided with a main bearing pressure cover (9) for pressing the outer ring of the main bearing (8); The top cover of the turntable base (1) is provided with a gear protection cover (2), and the gear protection cover (2) is provided with a through hole for the main shaft (5) to pass through; An oil seal (4) is arranged between the main shaft (5) and the gear protection cover (2), wherein an oil seal baffle (3) is arranged on the gear protection cover (2).

7. The compact high-precision universal turntable according to claim 1, characterized in that: The direct drive power mechanism is a direct drive motor (7), comprising a motor rotor and a motor stator; The motor rotor is sleeved on the main shaft (8); The motor stator is arranged in the turntable base (1).

8. The compact high-precision universal turntable according to claim 7, characterized in that: A support plate (19) is provided at the bottom of the turntable base (1); The resolver rotor is arranged on the main shaft (5) located below the motor rotor; The support plate (19) is provided with a resolver support seat (24) for mounting the resolver stator.

9. The compact high-precision universal turntable according to claim 1, characterized in that: The turntable base (1) is also provided with an attitude instrument assembly (18), which is composed of an attitude instrument base (18-1) and an attitude instrument (18-2); The outer side of the turntable base (1) is also provided with a socket board assembly (26) and a wiring block assembly (29) for laying cables inside the turntable.

10. The compact high-precision universal turntable according to claim 7, characterized in that: The main shaft (5) is provided with a locking nut (16) on one side of the main bearing (8); The bottom of the turntable base (1) is also provided with a hollow bottom cover (20).

Images