Fault-proof manned lunar vehicle wheel driving device

Abstract

The utility model relates to the field of mechanical transmission, and provides an anti-fault manned lunar vehicle wheel driving device which comprises a driving assembly, a self-locking assembly, a hub assembly, an axle and wheels. A driving assembly is fixedly connected to an inner cavity of the axle. The radial surface of the driving assembly is rotationally connected with a hub assembly; the surface of the hub assembly is in threaded connection with wheels; the hub end face in the hub assembly is in threaded connection with a self-locking assembly, and the self-locking assembly is in engaged connection with the driving assembly. The semicircular notches are formed in the end portions of the turbine semicircular shaft and the planet output shaft, so that when the lunar rover wheel breaks down, the worm motor drives the turbine semicircular shaft notch to rotate to the state opposite to the planet output shaft notch through the worm, and then the hub is converted into the free rotation state from the stuck state; the defects that after the wheels of the lunar rover break down, an astronaut cannot quickly judge fault points and cannot maintain the lunar rover in time are overcome.

Description

Technical Field

[0001] The utility model relates to a wheel drive device for a fail-safe manned lunar rover, belonging to the field of mechanical transmission. Background Art

[0002] A manned lunar rover can enable astronauts to conduct exploration activities on the lunar surface and facilitate the rapid movement of astronauts on the lunar surface. At the same time, the video recording equipment of the manned lunar rover can better send lunar surface information back to the command center. Currently, all the launched lunar rovers are wheeled lunar rovers with 4-wheel, 6-wheel, and 8-wheel designs. Most of the lunar rovers launched abroad are 6-wheel and 8-wheel. At present, no manned lunar rover has been launched in China, and the driving stability of the lunar rover is related to the safety of astronauts. The Chinese invention patent with the patent number CN202010257723.5 discloses a wheel-track composite high-passage lunar rover, which can meet the smooth driving requirements of the lunar rover on different driving surfaces such as slopes, curves, and ditches in soft lunar soil, and has high passability.

[0003] However, the inventors of the present utility model found that the existing technology has the following problems: Aerospace products generally do not have maintainability. Coupled with the fact that astronauts need to wear heavy spacesuits during space activities, when a fault occurs in the wheels of the lunar rover, astronauts cannot quickly determine the fault point and cannot repair it in time, which may pose a threat to the personal safety of astronauts. Therefore, improvement is needed. Summary of the Invention

[0004] To solve the above technical problems, the present utility model provides a wheel drive device for a fail-safe manned lunar rover, which can provide an emergency method for quickly solving faults when a fault occurs in the wheels of the lunar rover.

[0005] The present utility model is achieved through the following technical solutions.

[0006] The present utility model provides a wheel drive device for a fail-safe manned lunar rover, including a drive assembly, a self-locking assembly, a hub assembly, an axle, and a wheel; a drive assembly is fixedly connected to the inner cavity of the axle; a hub assembly is rotatably connected to the radial surface of the drive assembly; a wheel is threadedly connected to the surface of the hub assembly; a self-locking assembly is threadedly connected to the hub end face inside the hub assembly, and the self-locking assembly is meshed with the drive assembly; the drive assembly includes a planetary motor, a planetary output shaft, and a planetary housing. The planetary motor is arranged in the inner cavity of the axle; the output shaft of the planetary motor is key-connected to the planetary output shaft, and a semi-circular notch is provided at the end of the planetary output shaft; the edge of the end face of the planetary motor shaft is fixedly connected to the planetary housing, and the planetary output shaft is coaxially arranged in the inner cavity of the planetary housing.

[0007] The hub assembly includes a hub, a first bearing, and a second bearing; in the inner cavity of the hub, the second bearing is sequentially arranged along the axial direction close to the axle and is rotatably connected to the inner surface of the planetary housing, and the first bearing is rotatably connected to the outer surface of the planetary housing.

[0008] The hub assembly further includes a first screw, and the first screw passes through the through hole and is threadedly connected to the wheel abutting against the surface of the hub.

[0009] The hub assembly further includes a dust ring and a rear seal cover; the dust ring and the rear seal cover are sequentially sleeved on the outer surface of the planetary housing along the axial direction of the hub, and the end face of the rear seal cover is threadedly connected to the end face of the hub; a front dust cover is threadedly connected to the other end face of the hub.

[0010] The self-locking assembly includes a power source, a power switch, a worm motor, a worm, a worm wheel semi-axis, a fixing plate, and a second screw; the stepped shaft at one end of the power source is connected to the fixing plate; the end face of the other end of the power source is fixedly connected to the end face of the worm motor; the power switch is provided on the surface of the power source; the output shaft of the worm motor is connected to the worm through a coupling; the other end of the worm passes through the fixing plate and is rotatably connected to the fixing plate through a bearing; the second screw passes through the through hole of the fixing plate and is threadedly connected to the end face of the hub.

[0011] The worm wheel semi-axis is arranged perpendicular and staggered relative to the worm and is meshed with the worm.

[0012] A semi-circular notch is provided on the optical axis part of the worm wheel semi-axis.

[0013] The beneficial effect of the present utility model lies in that: by providing semi-circular notches at the ends of the turbine semi-axis and the planetary output shaft, when a failure occurs in the lunar rover wheel, the worm motor drives the notch of the worm wheel semi-axis to rotate to a state opposite to the notch of the planetary output shaft through the worm, so that the hub is converted from a stuck state to a free rotation state, overcoming the disadvantages that astronauts cannot quickly determine the fault point and cannot repair it in time after a failure occurs in the lunar rover wheel. Description of the Drawings

[0014] Figure 1 is a sectional view of the present utility model;

[0015] Figure 2 is Figure 1 an enlarged view of the self-locking assembly in

[0016] Figure 3 is Figure 1 a 3D schematic diagram of the inlay separation of the planetary output shaft and the turbine semi-axis in

[0017] In the figure: 1 - driving assembly, 11 - planetary motor, 12 - planetary output shaft, 13 - planetary housing, 2 - self-locking assembly, 21 - power supply, 22 - power switch, 23 - worm motor, 24 - worm, 25 - semi-circular worm wheel shaft, 26 - fixing plate, 27 - second screw, 3 - hub assembly, 31 - hub, 32 - dust-proof ring, 33 - rear seal cover, 34 - front dust-proof cover, 35 - first bearing, 36 - second bearing, 37 - first screw, 4 - axle, 5 - wheel. Specific embodiments

[0018] The technical solution of the present invention will be further described below, but the scope of protection is not limited thereto.

[0019] The first embodiment of the present invention relates to a Figures 1-3 kind of anti-fault manned lunar rover wheel drive device as shown in the figure, including a driving assembly 1, a self-locking assembly 2, a hub assembly 3, an axle 4 and a wheel 5; a driving assembly 1 is fixedly connected to the inner cavity of the axle 4; a hub assembly 3 is rotatably connected to the radial surface of the driving assembly 1; a wheel 5 is threadedly connected to the surface of the hub assembly 3; a self-locking assembly 2 is threadedly connected to the end face of the hub 31 in the hub assembly 3, and the self-locking assembly 2 is meshed and connected to the driving assembly 1; the driving assembly 1 includes a planetary motor 11, a planetary output shaft 12 and a planetary housing 13, and the planetary motor 11 is arranged in the inner cavity of the axle 4; the output shaft of the planetary motor 11 is key-connected to the planetary output shaft 12, and a semi-circular notch is provided at the end of the planetary output shaft 12; the edge of the end face of the planetary motor 11 is fixedly connected to the planetary housing 13, and the planetary output shaft 12 is coaxially arranged in the inner cavity of the planetary housing 13; the driving assembly 1 provides rotational power for the wheel 5; the self-locking assembly 2 can unlock when the wheel 5 is locked; the hub assembly 3 is a connecting member connecting the driving assembly 1 and the wheel 5; the axle 4 plays a supporting role for the whole driving device; the planetary motor 11 provides driving power; the planetary housing 13 is used to protect the planetary output shaft 12; the planetary output shaft 12 can amplify the torque of the planetary motor 11.

[0020] The second embodiment of the present invention is basically the same as the first embodiment, mainly in the scheme optimization of the hub assembly. The hub assembly 3 includes a hub 31, a first bearing 35 and a second bearing 36; the inner cavity of the hub 31 is sequentially provided with a second bearing 36 and the inner surface of the planetary housing 13 for rotational connection along the axis direction close to the axle 4, and a first bearing 35 and the outer surface of the planetary housing 13 for rotational connection; the hub 31 is an intermediary connecting the planetary output shaft 12 and the wheel 5; the first bearing 35 and the second bearing 36 can ensure the free rotation of the hub 31.

[0021] The hub assembly 3 further includes a first screw 37, and the first screw 37 passes through the through hole and is threadedly connected to the wheel 5 abutted against the surface of the hub 31, which can transmit the torque received by the hub 31 to the wheel 5, so that the wheel 5 and the hub 31 rotate synchronously.

[0022] The hub assembly 3 further includes a dust-proof ring 32 and a rear seal cover 33; the dust-proof ring 32 and the rear seal cover 33 are sequentially sleeved on the outer surface of the planetary housing 13 along the axial direction of the hub 31, and the end face of the rear seal cover 33 is threadedly connected to the end face of the hub 31; a front dust-proof cover 34 is threadedly connected to the other end face of the hub 31; the dust-proof ring 32 can prevent dust from entering the interior of the hub 31; the front dust-proof cover 34 and the rear seal cover 33 respectively seal the hub 31 from the front and rear directions, and can initially prevent impurities from entering the hub 31.

[0023] The third embodiment of the present utility model is basically the same as the first embodiment, mainly in further optimization. The self-locking assembly 2 includes a power source 21, a power switch 22, a worm motor 23, a worm 24, a worm gear semi-axis 25, a fixing plate 26 and a second screw 27; the stepped shaft at one end of the power source 21 is connected to the fixing plate 26; the end face of the other end of the power source 21 is fixedly connected to the end face of the worm motor 23; the power switch 22 is arranged on the surface of the power source 21; the output shaft of the worm motor 23 is connected to the worm 24 through a coupling; the other end of the worm 24 passes through the fixing plate 26 and is rotatably connected to the fixing plate 26 through a bearing; the second screw 27 passes through the through hole of the fixing plate 26 and is threadedly connected to the end face of the hub 31; the power source 21 provides power for the worm motor 23; the power switch 22 can control the on and off of the worm motor 23; the output torque of the worm motor 23 drives the worm 24 to rotate; the worm 24 drives the worm gear semi-axis 25 to rotate, so that the semi-circular notch rotates synchronously.

[0024] The worm gear semi-axis 25 is vertically and staggeredly arranged relative to the worm 24 and is meshed with the worm 24, and can change the transmission direction of the torque.

[0025] A semi-circular notch is arranged on the optical axis part of the worm gear semi-axis 25. When it is inlaid with the semi-circular notch of the planetary output shaft 12, the planetary output shaft 12 can drive the worm gear semi-axis 25 to rotate; when it is opposite to the semi-circular notch of the planetary output shaft 12, the planetary output shaft 12 cannot drive the worm gear semi-axis 25 to rotate and can only rotate idly, and thus cannot drive the hub 31 either.

[0026] Based on this, a typical working process of the present utility model is as follows:

[0027] When the present utility model is implemented, as Figures 1-3As shown, under normal circumstances, first, the semi-circular notches of the planetary output shaft 12 and the worm wheel semi-circular shaft 25 are in an inlaid state. The planetary motor 11 drives the planetary output shaft 12 to rotate, and the planetary output shaft 12 transmits torque to the worm wheel semi-circular shaft 25 through meshing transmission; the worm wheel semi-circular shaft 25 then transmits torque to the self-locking component 2 through worm and worm wheel transmission, and the self-locking component 2 further transmits torque to the wheel 5 to drive the wheel 5 to rotate forward; when the wheel 5 breaks down and gets stuck, press the power switch 22 to supply power to the worm motor 23 by the power supply 21. The worm motor 23 drives the worm 24 to rotate, and the worm 24 transmits torque to the worm wheel semi-circular shaft 25 through meshing transmission until the semi-circular notch of the worm wheel semi-circular shaft 25 is opposite to the semi-circular notch of the planetary output shaft 12. At this time, the hub 31 and the wheel 5 are in a free rotation state and will not get stuck; if the power switch 22 and the power supply 21 break down, the end of the worm 24 can also be manually rotated to make the semi-circular notch of the worm wheel semi-circular shaft 25 opposite to the semi-circular notch of the planetary output shaft 12. At this time, the hub 31 and the wheel 5 are also in a free rotation state, thus being able to prevent failures.

Claims

1. A wheel drive device for a fail-safe manned lunar rover, characterized in that: It includes a drive assembly (1), a self-locking assembly (2), a hub assembly (3), an axle (4) and a wheel (5); the drive assembly (1) is fixedly connected to the inner cavity of the axle (4); the hub assembly (3) is rotatably connected to the radial surface of the drive assembly (1); the wheel (5) is threadedly connected to the surface of the hub assembly (3); the end face of the hub (31) in the hub assembly (3) is threadedly connected to the self-locking assembly (2), and the self-locking assembly (2) is meshed with the drive assembly (1); the drive assembly (1) includes a planetary motor (11), a planetary output shaft (12) and a planetary housing (13), the planetary motor (11) is arranged in the inner cavity of the axle (4); the output shaft of the planetary motor (11) is key-connected to the planetary output shaft (12), and a semi-circular notch is provided at the end of the planetary output shaft (12); the edge of the end face of the planetary motor (11) is fixedly connected to the planetary housing (13), and the planetary output shaft (12) is coaxially arranged in the inner cavity of the planetary housing (13).

2. The wheel drive device of the fail-safe manned lunar rover according to claim 1, characterized in that: The hub assembly (3) includes a hub (31), a first bearing (35) and a second bearing (36); the second bearing (36) is sequentially arranged in the inner cavity of the hub (31) along the axial direction close to the axle (4) and is rotatably connected to the inner surface of the planetary housing (13), and the first bearing (35) is rotatably connected to the outer surface of the planetary housing (13).

3. The wheel drive device of the fail-safe manned lunar rover according to claim 1, wherein: The hub assembly (3) further includes a first screw (37), and the first screw (37) passes through the through hole and is threadedly connected to the wheel (5) abutted against the surface of the hub (31).

4. The wheel drive device of the fail-safe manned lunar rover according to claim 1, characterized in that: The hub assembly (3) further includes a dust ring (32) and a rear seal cover (33); the dust ring (32) and the rear seal cover (33) are sequentially sleeved on the outer surface of the planetary housing (13) along the axial direction of the hub (31), and the end face of the rear seal cover (33) is threadedly connected to the end face of the hub (31); a front dust cover (34) is threadedly connected to the other end face of the hub (31).

5. The wheel drive device of the fail-safe manned lunar rover according to claim 1, characterized in that: The self-locking assembly (2) includes a power supply (21), a power switch (22), a worm motor (23), a worm (24), a worm wheel semi-axis (25), a fixing plate (26) and a second screw (27); the stepped shaft at one end of the power supply (21) is connected to the fixing plate (26); the end face of the other end of the power supply (21) is fixedly connected to the end face of the worm motor (23); the power switch (22) is provided on the surface of the power supply (21); the output shaft of the worm motor (23) is connected to the worm (24) through a coupling; the other end of the worm (24) passes through the fixing plate (26) and is rotatably connected to the fixing plate (26) through a bearing; the second screw (27) passes through the through hole of the fixing plate (26) and is threadedly connected to the end face of the hub (31).

6. The wheel drive device of the fail-safe manned lunar rover according to claim 5, characterized in that: The worm wheel semi-axis (25) is vertically and staggeredly arranged relative to the worm (24) and is meshed with the worm (24).

7. The wheel drive device of the fail-safe manned lunar rover according to claim 5, characterized in that: A semi-circular notch is provided on the optical axis part of the worm wheel semi-axis (25).

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