Driving and locking device for a large rotary platform

Abstract

The utility model relates to a kind of drive and locking device of large rotary platform, belongs to rotary platform technical field;According to the pulse number of servo motor, the angle of rotary platform can be accurately calculated, and it can be accurately stopped according to the position required by user;When rotary platform needs to be locked, elevator drives brake shaft to rise, inserts into the center hole of positioning mounting base, until brake shaft upper end is pressed to push switch, lock rotary platform so that it cannot rotate, and push switch is disconnected circuit, to prevent servo motor misstart;Two sets of driving devices act together, so that two output gears contact the tooth surface of rotary support respectively, eliminate idle stroke by using bidirectional meshing compensation, so that rotary platform does not shake and oscillate when rotating at 0.05~5 ° / s speed;Four locking devices can be locked by single locking device or simultaneously locked by multiple locking devices according to the locking requirement of rotary platform, to increase the security of locking.

Description

Technical Field

[0001] This utility model belongs to the field of rotary platform technology, specifically relating to a drive and locking device for a large rotary platform. Background Technology

[0002] Most existing rotary platforms use a single drive from a common motor, with gear transmission between the drive and the rotary platform. Due to the backlash between the gears, there will be a period of idle travel when the gears switch between forward and reverse directions, which will cause the positioning of the rotary platform to deviate. Rotary platforms driven by common motors require an external angle encoder for angle counting, and the accuracy of angle positioning is low, which cannot meet the angle accuracy requirements of the equipment installed on the rotary platform. Summary of the Invention

[0003] The present invention aims to solve the technical problems existing in the prior art and provide a drive and locking device for a large rotary platform.

[0004] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: a driving and locking device for a large rotary platform, including a rotary platform, a rotary bearing, two sets of driving devices, four sets of locking devices and a support base. The two sets of driving devices are symmetrically arranged on the support base, and the four sets of locking devices are evenly distributed on the support base. The rotary bearing is located between the rotary platform and the support base. The rotary bearing includes an outer ring and an inner ring. The outer ring is fixedly connected to the support base, and the inner ring is connected to the rotary platform. The inner ring surface of the inner ring is a toothed surface.

[0005] Preferably, the drive device includes a servo motor, a precision reducer, a reducer base, a bearing cover, an output gear, and two bearings. The reducer base is fixedly installed on a support base and has a hollow structure. The bearing cover is fixedly installed on the top of the reducer base.

[0006] Preferably, the upper and lower ends of the output gear are rotatably connected to the bearing cover and the reducer base by two bearings, and the precision reducer is located at the bottom of the reducer base, with its output end connected to the output gear.

[0007] Preferably, the servo motor is connected to a precision reducer, the drive end of the servo motor is connected to the input end of the precision reducer, and the output gear meshes with the tooth surface on the inner ring of the slewing bearing.

[0008] Preferably, the locking device includes a lift, a brake shaft, a lift base, an oil-free bushing, a steel sleeve, a positioning mounting base, and a push switch; the lift base is fixedly connected to the support base; the lift and the brake shaft are mounted on the lift base, and the lift and the lift base are fixedly installed, with the top of the screw in the lift connected to the bottom of the brake shaft.

[0009] Preferably, an oil-free bushing is placed between the brake shaft and the elevator base, a steel sleeve is embedded in the positioning mounting seat, a push switch is installed on the top of the positioning mounting seat, and the positioning mounting seat is installed on the rotary platform.

[0010] The beneficial effects of this utility model are:

[0011] The servo motor outputs speed as needed. Through the reduction speed of the precision reducer and the reduction ratio between the output gear and the slewing bearing, the rotary platform is stabilized at a speed of 0.05 to 5° / s. Based on the number of pulses of the servo motor, the angle through which the rotary platform has rotated can be accurately calculated, and it can be accurately stopped at the position required by the user.

[0012] When the slewing platform needs to be locked, the elevator drives the brake shaft to rise and insert it into the center hole of the positioning mounting seat until the upper end of the brake shaft presses against the push switch, locking the slewing platform so that it cannot rotate. The push switch disconnects the circuit to prevent the servo motor from starting accidentally.

[0013] The two drive units work together to make the two output gears contact the tooth surfaces of the slewing bearing respectively. The bidirectional meshing compensation eliminates the free travel, so that the slewing platform rotates at a speed of 0.05 to 5° / s without shaking or oscillation. The four locking devices can be used to lock according to the locking requirements of the slewing platform, either by using a single locking device or by using multiple locking devices simultaneously to increase the locking security. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the drive device of this utility model;

[0016] Figure 3 This is a schematic diagram of the locking device of this utility model.

[0017] In the diagram: 1. Slewing platform; 2. Slewing bearing; 3. Drive unit; 4. Locking device; 5. Support base; 31. Servo motor; 32. Precision reducer; 33. Reducer base; 34. Bearing cover; 35. Output gear; 36. Bearing; 41. Lift; 42. Brake shaft; 43. Lift base; 44. Oil-free bushing; 45. Steel sleeve; 46. Positioning mounting base; 47. Push switch; 48. Outer ring; 49. Inner ring. Detailed Implementation

[0018] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0019] Example: A drive and locking device for a large rotary platform, such as Figures 1-3As shown, the system includes a rotary platform 1, a rotary bearing 2, two sets of drive devices 3, four sets of locking devices 4, and a support base 5. The two sets of drive devices 3 are symmetrically arranged on the support base 5, and the four sets of locking devices 4 are evenly distributed on the support base 5. The rotary bearing 2 is located between the rotary platform 1 and the support base 5. The rotary bearing 2 includes an outer ring 48 and an inner ring 49. The outer ring 48 is fixedly connected to the support base 5, and the inner ring 49 is connected to the rotary platform 1. The inner ring 49 surface of the inner ring 49 is a toothed surface.

[0020] The drive device 3 includes a servo motor 31, a precision reducer 32, a reducer base 33, a bearing cover 34, an output gear 35, and two bearings 36. The reducer base 33 is fixedly installed on the support base 5 and has a hollow structure. The bearing cover 34 is fixedly installed on the top of the reducer base 33.

[0021] The upper and lower ends of the output gear 35 are rotatably connected to the bearing cover 34 and the reducer base 33 by two bearings 36. The precision reducer 32 is located at the bottom of the reducer base 33, and its output end is connected to the output gear 35.

[0022] The servo motor 31 is connected to the precision reducer 32, and the drive end of the servo motor 31 is connected to the input end of the precision reducer 32. The output gear 35 meshes with the tooth surface on the inner ring 49 of the slewing bearing 2.

[0023] The locking device 4 includes a lift 41, a brake shaft 42, a lift base 43, an oil-free bushing 44, a steel sleeve 45, a positioning mounting base 46, and a push switch 47; the lift base 43 is fixedly connected to the support base 5; the lift 41 and the brake shaft 42 are mounted on the lift base 43, and the lift 41 and the lift base 43 are fixedly installed, with the top of the screw in the lift 41 connected to the bottom of the brake shaft 42.

[0024] An oil-free bushing 44 is located between the brake shaft 42 and the elevator base 43. A steel sleeve 45 is embedded in the positioning mounting base 46. A push switch 47 is installed on the top of the positioning mounting base 46. The positioning mounting base 46 is installed on the rotary platform 1.

[0025] The principle of this invention is as follows: In use, the servo motor 31 outputs a speed as needed, which is driven by the precision reducer 32 to rotate the output gear 35. The two sets of drive devices 3 simultaneously drive the slewing bearing 2 through the output gear 35, thereby driving the slewing platform 1 to rotate. Through the reduction speed of the precision reducer 32 and the reduction ratio between the output gear 35 and the slewing bearing 2, the slewing platform 1 is stabilized at a speed of 0.05 to 5° / s. Based on the number of pulses of the servo motor 31, the angle through which the slewing platform 1 has rotated can be accurately calculated, and it can be accurately stopped at the position required by the user.

[0026] When the rotary platform 1 needs to be locked, the lift 41 drives the brake shaft 42 to rise and insert it into the center hole of the positioning mounting seat 46 until the upper end of the brake shaft 42 presses against the push switch 47, locking the rotary platform 1 so that it cannot rotate. The push switch 47 disconnects the circuit to prevent the servo motor 31 from starting accidentally. The lift 41 can be operated manually or hydraulically to lift the brake shaft 42.

[0027] The two drive units 3 work together to make the two output gears 35 contact the tooth surfaces of the slewing bearing 2 respectively. The bidirectional meshing compensation eliminates the idle stroke, so that the slewing platform 1 rotates at a speed of 0.05 to 5° / s without shaking or oscillation. The four locking devices 4 are designed according to the locking requirements of the slewing platform 1. They can be locked by a single locking device 4 or by multiple locking devices 4 at the same time to increase the locking security.

[0028] Finally, it should be noted that the above embodiments are merely representative examples of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. A drive and locking device for a large rotary platform, comprising a rotary platform (1), a rotary bearing (2), two sets of drive devices (3), four sets of locking devices (4), and a support base (5), characterized in that: Two sets of drive devices (3) are symmetrically arranged on the support base (5), and four sets of locking devices (4) are evenly distributed on the support base (5). The slewing bearing (2) is located between the slewing platform (1) and the support base (5). The slewing bearing (2) includes an outer ring (48) and an inner ring (49). The outer ring (48) is fixedly connected to the support base (5), and the inner ring (49) is connected to the slewing platform (1). The inner ring (49) surface of the inner ring (49) is a toothed surface.

2. The drive and locking device for a large rotary platform according to claim 1, characterized in that: The drive device (3) includes a servo motor (31), a precision reducer (32), a reducer base (33), a bearing cover (34), an output gear (35), and two bearings (36). The reducer base (33) is fixedly installed on the support base (5) and has a hollow structure. The bearing cover (34) is fixedly installed on the top of the reducer base (33).

3. The driving and locking device for a large rotary platform according to claim 2, characterized in that: The upper and lower ends of the output gear (35) are rotatably connected to the bearing cover (34) and the reducer base (33) by two bearings (36). The precision reducer (32) is located at the bottom of the reducer base (33) and its output end is connected to the output gear (35).

4. The drive and locking device for a large rotary platform according to claim 3, characterized in that: The servo motor (31) is connected to the precision reducer (32), the drive end of the servo motor (31) is connected to the input end of the precision reducer (32), and the output gear (35) meshes with the tooth surface on the inner ring (49) of the slewing bearing (2).

5. The drive and locking device for a large rotary platform according to claim 4, characterized in that: The locking device (4) includes a lift (41), a brake shaft (42), a lift base (43), an oil-free bushing (44), a steel sleeve (45), a positioning mounting base (46), and a push switch (47); the lift base (43) is fixedly connected to the support base (5); the lift (41) and the brake shaft (42) are installed on the lift base (43), the lift (41) and the lift base (43) are fixedly installed, and the top of the screw in the lift (41) is connected to the bottom of the brake shaft (42).

6. The driving and locking device for a large rotary platform according to claim 5, characterized in that: An oil-free bushing (44) is located between the brake shaft (42) and the elevator base (43). A steel sleeve (45) is embedded in the positioning mounting base (46). A push switch (47) is installed on the top of the positioning mounting base (46). The positioning mounting base (46) is installed on the rotary platform (1).

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