Large transmission mechanism with space revolution

Abstract

A space revolution type large transmission mechanism, including driving locking parts, guide rails, upper end flanges, lower end flanges, rotary support mechanisms, clamping locking mechanisms. The lower end flanges are clamped as a whole with the guide rails through the clamping locking mechanisms; 8 sets of rotary support mechanisms are distributed and fixed on the upper end flanges, the guide rails are connected with the upper end flanges through the rotary support mechanisms, and the rotary motion is realized by the rolling amplitude in the rotary support mechanisms; the driving locking parts have two functions of driving and locking; the driving locking parts are installed and fixed on the upper end flanges, the end gear realizes the revolution around the guide rails by meshing with the guide rails, and further drives the rotation of the upper end flanges; the upper end flanges can be connected and matched with large size envelope loads. The meshing transmission of the end gear and the guide rail gear ring can realize the driving of large loads, and has the characteristics of strong driving capacity, simple and ingenious transmission chain form and stable and reliable transmission.

Description

Technical Field

[0001] This invention belongs to the field of spacecraft transmission and relates to a large-scale space revolution transmission mechanism. Background Technology

[0002] Transmission mechanisms are a common type of mechanism in the field of spacecraft mechanics. They rely on the meshing of driving and driven parts or the meshing of intermediate parts to transmit power or motion. In recent years, as spacecraft payloads have become more complex and powerful, the requirements for spacecraft payload transmission mechanisms have become increasingly stringent. In addition to being able to drive payloads with large envelope sizes, the internal transmission chain structure of space transmission mechanisms should not be too complex. Furthermore, the control of weight, a key technical indicator, is also very strict for space products.

[0003] Gear transmission mechanisms are widely used due to their advantages of reliable transmission, high efficiency and compact structure. However, the center distance of the gear transmission shaft cannot be too large, so they are not suitable for the transmission of large loads and cannot meet the requirements of driving large loads such as solar panels in the space station field and long-life rotation.

[0004] Given the technical challenges we currently face, there is an urgent need for a transmission mechanism that features a simple transmission chain, strong driving capability, and stable and reliable transmission. Summary of the Invention

[0005] The technical problem solved by this invention is to overcome the shortcomings of the prior art and propose a large-scale spatial revolution transmission mechanism. This mechanism solves the technical problem that traditional gear transmission methods cannot transmit large loads due to the unsuitable center distance. It can drive large loads and has the characteristics of simple transmission chain, strong driving capability, and stable and reliable transmission.

[0006] The solution of the present invention is:

[0007] A large-scale spatial revolution transmission mechanism includes a drive locking component, a guide rail, an upper end flange, a lower end flange, a rotary support mechanism, and a clamping locking mechanism.

[0008] Two sets of clamping and locking mechanisms are installed and fixed on the lower end flange at a 180° interval. The upper end of each clamping and locking mechanism is used to clamp and fix the guide rail. Eight sets of slewing support mechanisms are fixed on the upper end flange, with adjacent sets of slewing support mechanisms distributed at a 45° interval. The lower end of the slewing support mechanism is connected to the annular guide rail through a rolling pair. The drive locking component passes through the upper end flange, and its end gear meshes with the gear ring of the guide rail. Its upper end is fixed on the upper end flange. The upper end flange is used to fix the load.

[0009] After the drive locking component is unlocked, it can revolve around the guide rail through the meshing of the end gear and the gear ring of the guide rail, thereby driving the upper flange to rotate; after the drive locking component is locked, the entire transmission mechanism stops rotating.

[0010] Preferably, each clamping and locking mechanism includes an outer clamping pair and an inner clamping pair at its upper end. The outer clamping pair is in close contact with the outer surface of the guide rail by friction, and the inner clamping pair is in close contact with the inner surface of the guide rail by friction, so as to achieve clamping and fixing of the upper end of the clamping and locking component to the guide rail, thereby achieving a rigid connection between the guide rail and the lower end flange.

[0011] Preferably, the height of the eight sets of slewing support mechanisms from the upper flange is the same.

[0012] Preferably, the lower end of the slewing support mechanism is provided with an outer rolling bearing, an inner rolling bearing, and a bottom rolling bearing. The outer rolling bearing and the outer surface of the guide rail, the inner rolling bearing and the inner surface of the guide rail, and the bottom rolling bearing and the top surface of the guide rail respectively form rolling friction.

[0013] Preferably, the drive locking component includes an electromagnetic brake, a motor assembly, a planetary reducer, an output shaft, an end gear, and a pressure cap;

[0014] The electromagnetic brake applies a locking torque to the rotor of the motor assembly to achieve the locking function of the entire transmission chain by locking it upon power-on. The output shaft of the motor assembly is connected to the input end of the planetary reducer by locking screws. The output end of the planetary reducer is connected to the output shaft by a flat key. The end of the output shaft is connected to the end gear by a flat key. At the same time, the end gear is axially fixed on the output shaft by a pressure cap.

[0015] Preferably, after installation, the center distance deviation between the end gear axis and the guide rail axis is -0.08mm to -0.02mm, and the parallelism is ±0.04mm.

[0016] Preferably, the electromagnetic brake is locked when powered on and unlocked when powered off.

[0017] Preferably, the drive locking component further includes a drive locking mechanism mounting flange and a drive locking component housing. The planetary reducer, output shaft, and end gear are located inside the drive locking component housing. The pressure cover is installed at the end of the drive locking component housing. The motor assembly is installed at the upper end of the drive locking component housing. The drive locking mechanism mounting flange is installed on the drive locking component housing. The upper end of the drive locking component is fixed to the upper end face flange through the locking mechanism mounting flange.

[0018] The advantages of this invention compared to the prior art are:

[0019] (1) The present invention provides a large-scale spatial revolution transmission mechanism, which can drive the locking component to revolve around the guide rail by relying on the meshing of the end gear and the guide rail, and completes the drive in a "planetary" transmission manner. The transmission chain is simple and ingenious.

[0020] (2) The present invention provides a large space revolution transmission mechanism, which can be used to realize the driving function of large space loads by means of the meshing transmission of the end gear and the guide rail gear ring, and to match the rotation of loads with large size envelopes.

[0021] (3) The present invention provides a large-scale spatial revolution transmission mechanism. When the brake is powered on, the transmission chain can be locked. When the power is cut off, the transmission chain can be unlocked. The locking and unlocking process is simple and reliable, and it has the characteristics of simple operation and safety. Attached Figure Description

[0022] Figure 1 A schematic diagram of the overall structure of a large-scale spatial revolution transmission mechanism provided by the present invention;

[0023] Figure 2 This is a front view schematic diagram of the overall structure of a large-scale spatial revolution transmission mechanism provided by the present invention;

[0024] Figure 3 A schematic diagram of the drive locking component structure;

[0025] Figure 4 This is a schematic diagram showing the clamping and locking mechanism locked to the guide rail.

[0026] Figure 5 This is a schematic diagram showing the locking state of the rotary support mechanism and the guide rail;

[0027] Figure 6 This is a schematic diagram of the guide rail structure;

[0028] Illustration:

[0029] 1—Drive locking component; 2—Upper end flange; 3—Rotation support mechanism; 4—Clamping locking mechanism; 5—Lower end flange; 6—Guide rail; 101—Electromagnetic brake; 102—Motor assembly; 103—Drive locking mechanism mounting flange; 104—Planetary reducer; 105—Output shaft; 106—End gear; 107—Gland; 301—Outer rolling bearing; 302—Inner rolling bearing; 303—Bottom rolling bearing; 401—Outer clamping pair; 402—Outer clamping pair. Detailed Implementation

[0030] The invention will now be further described with reference to the accompanying drawings.

[0031] like Figure 1 , Figure 2As shown in the figure, the present invention proposes a spatial revolution type large transmission mechanism, which includes a drive locking component 1, a guide rail 6, an upper end flange 2, a lower end flange 5, a rotary support mechanism 3, and a clamping locking mechanism 4.

[0032] The clamping and locking mechanism 4 is installed and fixed on the lower end flange 5. Two sets of clamping and locking components 1 are distributed at 180° on the lower end flange 5. Each set of clamping and locking mechanism 4 clamps and fixes itself to the guide rail 6 by means of friction between the outer clamping pair 401 and the inner clamping pair 402, thereby achieving a rigid connection between the guide rail 6 and the lower end flange 5. Figure 4 As shown.

[0033] Eight sets of slewing support mechanisms 3 are distributed and fixed on the upper end flange 2. The distance between two adjacent sets of slewing support mechanisms 3 is 45°. The height of the eight sets of slewing support mechanisms from the upper end flange is kept consistent by adjusting the shims.

[0034] like Figure 5 , Figure 6 As shown, the guide rail 6 is connected to the upper end flange 2 through the rotary support mechanism 3, and can achieve rotary motion by relying on the three rolling amplitudes in the rotary support mechanism 3. The outer rolling bearing 301, inner rolling bearing 302 and bottom rolling bearing 303 in the rotary support mechanism 3 form rolling friction with the outer surface, inner surface and upper top surface of the guide rail 6, respectively, which can reduce wear and stabilize the fluctuation of friction torque during rotation.

[0035] like Figure 3 The drive locking component 1 shown includes an electromagnetic brake 101, a motor assembly 102, a drive locking mechanism mounting flange 103, a planetary reducer 104, an output shaft 105, an end gear 106, a pressure cover 107, and a drive locking component housing, and has two main functions: driving and locking.

[0036] The motor assembly outputs torque and speed, which are reduced at a certain transmission ratio through a planetary reducer, while increasing the output torque. The output speed and torque are transmitted to the output shaft, and then to the end gear, thus achieving the driving function. The electromagnetic brake 101 applies a locking torque to the rotor of the motor assembly 102 through power-on locking, thereby achieving the locking function of the entire transmission chain. The output shaft of the motor assembly 102 is connected to the input end of the planetary reducer 104 through a locking screw. The output end of the planetary reducer 104 is connected to the output shaft 105 through a flat key. The end of the output shaft 105 is connected to the end gear 106 through a flat key. At the same time, the end gear 106 is axially fixed to the output shaft 105 through a pressure cap 107.

[0037] The planetary reducer, output shaft, and end gear are located inside the drive locking component housing. The pressure cover is installed at the end of the drive locking component housing, the motor assembly is installed at the upper end of the drive locking component housing, and the drive locking mechanism mounting flange is installed on the drive locking component housing. The upper end of the drive locking component is fixed to the upper end flange through the locking mechanism mounting flange.

[0038] The driving function of the drive locking component 1 is realized through the motor assembly 102 and the mechanism transmission chain, and the rotation is transmitted through the meshing of the end gear 106 with the guide rail 6.

[0039] The locking function of the drive locking component 1 is achieved by locking the transmission chain through the electromagnetic brake 101. The transmission chain can be locked when the brake 101 is energized, and can be unlocked when the power is cut off. The locking and unlocking process is simple and reliable, which can ensure the stability and safety of the entire transmission mechanism.

[0040] The drive locking component 1 is installed and fixed on the upper end flange 2. By adjusting the drive locking mechanism mounting flange 103, the center distance deviation between the axis of the end gear 106 and the axis of the guide rail 6 after installation is -0.08mm to -0.02mm, and the parallelism is ±0.04mm, so as to ensure that the end gear 106 and the guide rail 6 mesh normally.

[0041] like Figure 6 As shown, the entire inner ring of the guide rail 6 is an involute gear. The end gear 106 drives the locking component 1 to revolve around the guide rail 6 by meshing with the inner ring gear of the guide rail 6. The drive is completed in a "planetary" transmission manner, thereby driving the upper end flange 2 to rotate.

[0042] like Figure 1 As shown, the upper flange 2 has a diameter of up to 1450mm, which can be matched to loads with large envelope sizes.

[0043] When the drive locking component 1 receives a rotation signal, the electromagnetic brake 101 is de-energized, and the motor assembly 102 starts to rotate. The rotation is transmitted sequentially through the planetary reducer 104, the output shaft 105, and the end gear 106. The end gear 106 meshes with the guide rail 6 to drive the locking component 1 to revolve around the guide rail 6, completing the drive in a "planetary" transmission manner, thereby driving the upper end flange 2 to rotate.

[0044] The driving function of the driving locking component of the present invention is realized through the motor assembly and the mechanism transmission chain, and the locking function of the driving locking component is realized through the brake locking transmission chain.

[0045] In this invention, the lower end flange is clamped to the guide rail as a whole by a clamping and locking mechanism, thus fixing the guide rail. Eight sets of rotary support mechanisms are distributed and fixed on the upper end flange. The guide rail is connected to the upper end flange through the rotary support mechanisms and can achieve rotary motion by relying on the rolling amplitude in the rotary support mechanisms. The drive and locking components include a motor assembly, a brake, a planetary reducer, and an end gear, which have two main functions: driving and locking. The driving function is achieved through the motor assembly and the mechanism transmission chain, and the locking function is achieved through the brake locking transmission chain. The drive and locking components are installed and fixed on the upper end flange. The end gear revolves around the guide rail by meshing with it, thereby driving the upper end flange to rotate. The upper end flange can be connected to match large-sized envelope loads and can rotate with the upper end flange. This invention proposes a spatial revolution-type large transmission mechanism, which can drive large loads by meshing the end gear with the guide rail gear ring, and has the characteristics of strong driving capability, simple and ingenious transmission chain form, and stable and reliable transmission.

[0046] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. A large-scale spatial revolution transmission mechanism, characterized in that: It includes a drive locking component (1), a guide rail (6), an upper end flange (2), a lower end flange (5), a rotary support mechanism (3), and a clamping locking mechanism (4); Two sets of clamping and locking mechanisms (4) are installed and fixed on the lower end flange (5) at a 180° interval. The upper end of each clamping and locking mechanism is used to clamp and fix the guide rail (6). Eight sets of rotary support mechanisms (3) are fixed on the upper end flange (2). The adjacent two sets of rotary support mechanisms (3) are distributed at a 45° interval. The lower end of the rotary support mechanism (3) is connected to the annular guide rail through a rolling pair. The drive locking component (1) passes through the upper end flange (2). Its end gear meshes with the gear ring of the guide rail. Its upper end is fixed on the upper end flange (2). The upper end flange (2) is used to fix the load. After the drive locking component (1) is unlocked, it can revolve around the guide rail (6) through the meshing of the end gear with the gear ring of the guide rail, thereby driving the upper end flange (2) to rotate; after the drive locking component (1) is locked, the entire transmission mechanism stops rotating.

2. The large-scale spatial revolution transmission mechanism according to claim 1, characterized in that: Each clamping and locking mechanism includes an outer clamping pair (401) and an inner clamping pair (402) at the upper end. The outer clamping pair (401) relies on friction to fit tightly against the outer surface of the guide rail, and the inner clamping pair (402) relies on friction to fit tightly against the inner surface of the guide rail, thereby achieving clamping and fixing of the upper end of the clamping and locking component to the guide rail (6), thus achieving a rigid connection between the guide rail (6) and the lower end flange (5).

3. The large-scale spatial revolution transmission mechanism according to claim 1, characterized in that: The height of the eight slewing support mechanisms from the upper flange is consistent.

4. A large-scale spatial revolution transmission mechanism according to claim 1, characterized in that: The lower end of the slewing support mechanism (3) is provided with an outer rolling bearing (301), an inner rolling bearing (302), and a bottom rolling bearing (303). The outer rolling bearing (301) and the outer surface of the guide rail (6), the inner rolling bearing (302) and the inner surface of the guide rail (6), and the bottom rolling bearing (303) and the top surface of the guide rail (6) respectively form rolling friction.

5. A large-scale spatial revolution transmission mechanism according to claim 1, characterized in that: The drive locking component (1) includes an electromagnetic brake (101), a motor assembly (102), a planetary reducer (104), an output shaft (105), an end gear (106), and a pressure cap (107); The electromagnetic brake (101) locks the entire transmission chain by applying a locking torque to the rotor of the motor assembly (102) through power-on locking. The output shaft of the motor assembly (102) is connected to the input end of the planetary reducer (104) through a locking screw. The output end of the planetary reducer (104) is connected to the output shaft (105) through a flat key. The end of the output shaft (105) is connected to the end gear (106) through a flat key. At the same time, the end gear (106) is axially fixed on the output shaft (105) through a pressure cap (107).

6. A large-scale spatial revolution transmission mechanism according to claim 5, characterized in that: After installation, the center distance deviation between the axis of the end gear (106) and the axis of the guide rail (6) is -0.08mm to -0.02mm, and the parallelism is ±0.04mm.

7. A large-scale spatial revolution transmission mechanism according to claim 5, characterized in that: The electromagnetic brake (101) is locked when powered on and unlocked when powered off.

8. A large-scale spatial revolution transmission mechanism according to claim 5, characterized in that: The drive locking component (1) also includes a drive locking mechanism mounting flange (103) and a drive locking component housing. The planetary reducer (104), output shaft (105), and end gear (106) are located inside the drive locking component housing. The pressure cap (107) is installed at the end of the drive locking component housing. The motor assembly (102) is installed at the upper end of the drive locking component housing. The drive locking mechanism mounting flange (103) is installed on the drive locking component housing. The upper end of the drive locking component (1) is fixed to the upper end flange (2) through the locking mechanism mounting flange (103).

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