A reverse dual-output shaft multi-stage reducer with self-locking function

Abstract

The present invention discloses a multi-stage speed reducer with a reverse dual-output shaft and a self-locking function. The speed reducer includes a servo motor, an NGW-type planetary transmission mechanism, a bevel gear mechanism, a worm gear mechanism, a cylindrical gear transmission mechanism, and a bevel gear transmission reverse dual-output shaft mechanism. The worm gear mechanism is also connected to a bidirectional manual input mechanism. The output end of the servo motor is transmission-connected to the NGW-type planetary transmission mechanism. The worm gear mechanism includes a worm and a worm wheel. The NGW-type planetary transmission mechanism is transmission-connected to the bevel gear mechanism. The bevel gear mechanism and the bidirectional manual input mechanism are both transmission-connected to the worm. The bidirectional manual input mechanism includes a first manual bevel gear, a manual shaft, and a second manual bevel gear. The bevel gear transmission reverse dual-output shaft mechanism includes a third bevel gear, a right bevel gear output shaft, and a left bevel gear output shaft. The third bevel gear is connected to the cylindrical gear transmission mechanism. The present invention only requires two speed reducers, occupies a small space, and has a reliable and safe self-locking function.

Description

Technical Field

[0001] The present invention belongs to the technical field of speed reducers, and in particular relates to a reverse dual-output shaft multi-stage speed reducer with a self-locking function. Background Art

[0002] Currently, aircraft bomb loading typically involves manual loading or loading via a bomb loading vehicle. Manual loading is not only inefficient but also lacks accuracy. Loading requires the vehicle to be moved to the bottom of the aircraft, making it difficult to access due to limited space underneath the aircraft. Furthermore, the vehicle must repeatedly adjust its position to ensure alignment between the mounting rack and the aircraft's mounting area. This creates operational complexity, insufficient human resource utilization, significantly reduces loading efficiency, and compromises safety. Subsequently, aircraft bomb loading hoist systems have emerged. After hoisting the mounting rack, which holds the projectiles, into position, a locking drive mechanism locks the rack into place. In this locking drive mechanism, a low-power servo motor drives a reduction mechanism to rotate a locking hook, which passes through a corresponding positioning hole on the mounting rack, thereby locking the mounting rack in place. However, the current locking drive mechanism requires four speed reducers to synchronize the positioning of the mounting rack, resulting in a bulky design.

[0003] Therefore, there is a lack of a compact, rationally designed, reverse dual-output shaft multi-stage reducer with a self-locking function. The total reduction ratio is large, and torque-enhanced transmission is achieved. Only two reducers are required, which occupies a small space and effectively adapts to the locking drive mechanism of the aircraft bomb hanging hoist system. The self-locking function is reliable and safe. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the deficiencies in the above-mentioned prior art and provide a reverse dual-output shaft multi-stage reducer with a self-locking function. The reducer has a compact structure, a reasonable design, a large total reduction ratio, and can realize torque-enhanced transmission. It only requires two reducers, occupies a small space, and can effectively adapt to the locking drive mechanism of the aircraft bomb hanging hoist system. It has a reliable and safe self-locking function.

[0005] To solve the above technical problems, the present invention adopts a technical solution: a multi-stage speed reducer with reverse dual output shafts and a self-locking function, characterized by comprising a servo motor, and an NGW-type planetary transmission mechanism, a bevel gear mechanism, a worm gear mechanism, a cylindrical gear transmission mechanism, and a bevel gear transmission reverse dual output shaft mechanism, which are arranged in the main housing and are sequentially connected in transmission, and the worm gear mechanism is also connected to a bidirectional manual input mechanism;

[0006] The output end of the servo motor is in transmission connection with the NGW type planetary transmission mechanism, the worm gear mechanism includes a worm provided in the main housing and a worm wheel meshing with the worm, the worm is arranged in a vertical direction, the NGW type planetary transmission mechanism is in transmission connection with the bevel gear mechanism, and the bevel gear mechanism and the bidirectional manual input mechanism are both in transmission connection with the worm;

[0007] The bidirectional manual input mechanism includes a manual bevel gear 1, a manual shaft and a manual bevel gear 2, wherein the manual bevel gear 2 is sleeved on the top of the worm and meshes with the manual bevel gear 1;

[0008] The bevel gear transmission reverse dual output shaft mechanism includes a bevel gear three, a bevel gear right output shaft and a bevel gear left output shaft, and the bevel gear three is connected to the cylindrical gear transmission mechanism.

[0009] The above-mentioned reverse dual-output shaft multi-stage reducer with a self-locking function is characterized in that: the NGW-type planetary transmission mechanism includes a sun gear, a plurality of planetary gears evenly distributed along the circumference of the sun gear and meshing with the sun gear, an inner ring gear arranged outside the plurality of planetary gears and meshing with the planetary gears, and a planet carrier for mounting the plurality of planetary gears, the planetary gears are connected to the planet carrier via planetary shafts, and the inner ring gear is arranged on the inner side wall of the main housing;

[0010] The transmission shaft of the sun gear is inserted into the servo motor shaft and is in transmission connection.

[0011] The above-mentioned reverse dual-output shaft multi-stage reducer with self-locking function is characterized in that: the bevel gear mechanism includes a small bevel gear sleeved on the end of the planetary carrier and a large bevel gear meshing with the small bevel gear, and the small bevel gear and the large bevel gear are orthogonal to each other at 90 degrees;

[0012] The large bevel gear is sleeved on the upper end of the worm.

[0013] The above-mentioned reverse dual-output shaft multi-stage reducer with a self-locking function is characterized in that: the manual bevel gear 1 includes a manual straight shaft section and a manual bevel gear portion integrally formed with the manual straight shaft section, the manual shaft includes an integrally formed connecting shaft end, an intermediate shaft section and an end shaft section, the connecting shaft end is drivingly connected to the manual bevel gear portion, and the outer diameters of the intermediate shaft section, the end shaft section and the connecting shaft end decrease in sequence;

[0014] The two sets of manual bevel gears are arranged on the top of the worm and mesh with the manual bevel gear part;

[0015] A first manual input interface and a second manual input interface are symmetrically arranged on the rear front side of the main shell. The manual straight shaft section extends into the first manual input interface, and the end shaft section extends into the second manual input interface.

[0016] The above-mentioned reverse dual-output shaft multi-stage reducer with a self-locking function is characterized in that: the inner side wall of the first manual input interface is provided with a first internal thread, the manual straight shaft section is provided with a first square hole, and the manual bevel gear portion is provided with a connecting circular hole, the connecting circular hole extends into the manual straight shaft section and is connected to the first square hole, the cross-sectional area of ​​the connecting circular hole is larger than the cross-sectional area of ​​the first square hole, the connecting shaft end is inserted into the connecting circular hole and is transmission-connected to the manual bevel gear portion via a cylindrical pin;

[0017] The inner side wall of the second manual input interface is provided with a second internal thread, and the end shaft section is provided with a second square hole;

[0018] The manual straight shaft section and the end shaft section are both rotatably mounted in the first manual input interface and the second manual input interface via a stamped outer ring needle roller bearing.

[0019] The above-mentioned reverse dual-output shaft multi-stage reducer with a self-locking function is characterized in that: the cylindrical gear transmission mechanism includes a gear shaft 1 for mounting a worm gear, a gear 1 provided at the other end of the gear shaft 1, a transition double gear meshing with both the gear shaft 1 and the gear 1, and a gear shaft 2 and a gear 2 meshing with the transition double gear, two transition gears are provided at both ends of the transition double gear, one of the transition gears meshes with the gear of the gear shaft 1 and the gear of the gear shaft 2, and the other of the transition gear meshes with the gear 1 and the gear 2;

[0020] The gear shaft 1 and gear 1 are coaxially arranged on both sides of the worm gear and have the same tooth shape and are aligned; the gear 2 is arranged at the other end of the gear shaft 2, and the gear shaft 2 and gear 2 are coaxially arranged and have the same tooth shape and are aligned.

[0021] The above-mentioned reverse dual-output shaft multi-stage reducer with a self-locking function is characterized in that: the right bevel gear of the right bevel gear output shaft and the left bevel gear of the left bevel gear output shaft are both engaged with bevel gear three, the bevel gear three is sleeved on gear shaft two and plugged into gear two, and the gear shaft two, bevel gear three and gear two are coaxially arranged;

[0022] The output ends of the right bevel gear output shaft and the left bevel gear output shaft extending out of the main housing are both provided with splines.

[0023] The above-mentioned reverse dual-output shaft multi-stage reducer with a self-locking function is characterized in that: the worm is arranged vertically in the right position inside the main housing, the worm wheel is arranged in the left position inside the main housing, the worm is a single-start worm, and the worm wheel has 33 teeth;

[0024] The lead angle of the worm is smaller than the equivalent friction angle between the meshing worm gear teeth.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] 1. The reduction gearbox of the present invention is suitable for matching the speed between the low-power servo motor and the locking hook in the locking drive mechanism of the aircraft bomb hoist system and increasing the output torque. After the hoist system lifts the bomb rack into place, the reduction gearbox drives the locking hook to lock the bomb rack into position.

[0027] 2. The present invention is provided with a multi-stage transmission mechanism including a planetary transmission mechanism, a bevel gear transmission mechanism, a bidirectional manual input mechanism, a worm gear transmission mechanism, a cylindrical gear transmission mechanism and a bevel gear transmission reverse dual output shaft mechanism, so that the total reduction ratio of the reducer is large (the total reduction ratio is close to 1:390), which can realize the increase of torque transmission while making the overall structure compact and small, thereby reducing the overall weight to meet the strict requirements of the aircraft on the weight of components.

[0028] 3. The present invention provides a bidirectional manual input mechanism including a manual bevel gear 1, a manual shaft, and a manual bevel gear 2. The bidirectional manual input mechanism interface is arranged perpendicular to the front and rear surfaces of the main housing. In an emergency, the manual interface can be used to drive the manual bevel gear 1 to drive the manual bevel gear 2. The gear 2 is arranged at the top of the worm, which can drive the subsequent mechanism to move, ultimately causing the aircraft bomb hoist locking system to lock the bomb rack. This allows the hoist locking system to be used in an emergency and locks safely and reliably, avoiding malfunctions or accidents.

[0029] 4. The worm gear transmission mechanism of the present invention includes a worm and a worm wheel. When the lead angle of the worm is less than the equivalent friction angle between the meshing worm wheel teeth, the worm gear transmission mechanism has a self-locking function and can achieve reverse self-locking. The self-locking function here plays a very important safety protection role.

[0030] 5. The bevel gear transmission reverse dual output shaft mechanism of the present invention includes bevel gear three and a bevel gear right output shaft and a bevel gear left output shaft arranged on the left and right sides of the main housing. Bevel gear three is meshed with the bevel gears at one end of the bevel gear right output shaft and the bevel gear left output shaft. When bevel gear three rotates driven by the cylindrical gear transmission mechanism, the bevel gear right output shaft and the bevel gear left output shaft will rotate in opposite directions, meeting the use requirements of the reverse dual output shaft of the aircraft bomb hanging hoist locking drive system and reducing the number of reducers used.

[0031] In summary, the present invention has a simple structure, reasonable design, a large total reduction ratio, and can achieve torque-enhanced transmission. It only requires two reducers, occupies a small space, effectively adapts to the locking drive mechanism of the aircraft bomb hanging hoist system, and has a self-locking function that is reliable and safe.

[0032] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a cross-sectional view of the present invention.

[0034] Figure 2 for Figure 1 DD cross-sectional view in.

[0035] Figure 3 for Figure 1 CC section view in.

[0036] Figure 4 This is a schematic diagram of the positions of the transition double gear and gear 2 of the present invention.

[0037] Description of the accompanying drawings:

[0038] 1-1—sun gear; 1-2—planetary gear; 1-3—ring gear;

[0039] 1-4—Planet shaft; 1-5—Planet carrier; 2-1—Pinion bevel gear;

[0040] 2-2—large bevel gear; 2-2-1—support ring; 2-2-2—retaining ring for hole;

[0041] 3-1—Manual bevel gear 1; 3-1-1—Manual straight shaft section; 3-1-2—First square hole;

[0042] 3-1-3—Connecting hole; 3-1-4—Manual bevel gear; 3-2—Manual shaft;

[0043] 3-2-1—Connecting shaft end; 3-2-2—Intermediate shaft section; 3-2-3—End shaft section;

[0044] 3-2-4—Second square hole; 3-3—Second manual bevel gear; 3-3-1—Countersunk screw;

[0045] 3-3-2—Pressing plate; 3-4—First manual input interface; 3-4-1—First internal thread;

[0046] 3-5—Second manual input interface; 3-5-1—Second internal thread; 4-1—Worm;

[0047] 4-2—worm gear; 5-1—gear shaft 1; 5-2—gear 1;

[0048] 5-3—transition double gear; 5-4—gear shaft 2; 5-5—gear 2;

[0049] 6-1—Bevel gear three; 6-2—Bevel gear right output shaft; 6-2-1—Right inner bushing;

[0050] 6-2-2—Outer cover; 6-3—Left bevel gear output shaft; 6-3-1—Left inner bushing;

[0051] 6-3-2—Outer shaft sleeve; 7—Main housing; 7-1—Circular cover;

[0052] 10—Servo motor. DETAILED DESCRIPTION

[0053] like Figures 1 to 4 As shown, the present invention includes a servo motor 10, and an NGW-type planetary transmission mechanism, a bevel gear mechanism, a worm gear mechanism, a cylindrical gear transmission mechanism, and a bevel gear transmission reverse dual output shaft mechanism, which are arranged in the main housing 7 and are sequentially connected in transmission. The worm gear mechanism is also connected to a bidirectional manual input mechanism.

[0054] The output end of the servo motor 10 is in transmission connection with the NGW type planetary transmission mechanism, the worm gear mechanism includes a worm 4-1 provided in the main housing 7 and a worm wheel 4-2 meshing with the worm 4-1, the worm 4-1 is arranged in a vertical direction, the NGW type planetary transmission mechanism is in transmission connection with the bevel gear mechanism, and the bevel gear mechanism and the bidirectional manual input mechanism are both in transmission connection with the worm 4-1;

[0055] The bidirectional manual input mechanism includes a manual bevel gear 1 3-1, a manual shaft 3-2 and a manual bevel gear 2 3-3. The manual bevel gear 2 3-3 is sleeved on the top of the worm 4-1 and meshes with the manual bevel gear 1 3-1.

[0056] The bevel gear transmission reverse dual output shaft mechanism includes bevel gear three 6-1, bevel gear right output shaft 6-2 and bevel gear left output shaft 6-3, and the bevel gear three 6-1 is connected to the cylindrical gear transmission mechanism.

[0057] In this embodiment, the NGW-type planetary transmission mechanism includes a sun gear 1-1, a plurality of planetary gears 1-2 uniformly distributed along the circumference of the sun gear 1-1 and meshing with the sun gear 1-1, an inner ring gear 1-3 arranged outside the plurality of planetary gears 1-2 and meshing with the planetary gears 1-2, and a planet carrier 1-5 for mounting the plurality of planetary gears 1-2. The planetary gears 1-2 are connected to the planet carrier 1-5 via planetary shafts 1-4, and the inner ring gear 1-3 is arranged on the inner side wall of the main housing 7.

[0058] The transmission shaft of the sun gear 1 - 1 is inserted into the shaft of the servo motor 10 and is in transmission connection.

[0059] In this embodiment, the bevel gear mechanism includes a small bevel gear 2-1 sleeved on the end of the planet carrier 1-5 and a large bevel gear 2-2 meshing with the small bevel gear 2-1, and the small bevel gear 2-1 and the large bevel gear 2-2 are orthogonal to each other at 90 degrees;

[0060] The large bevel gear 2-2 is sleeved on the upper end of the worm 4-1.

[0061] In this embodiment, the manual bevel gear 3-1 includes a manual straight shaft section 3-1-1 and a manual bevel gear portion 3-1-4 integrally formed with the manual straight shaft section 3-1-1. The manual shaft 3-2 includes an integrally formed connecting shaft end 3-2-1, an intermediate shaft section 3-2-2, and an end shaft section 3-2-3. The connecting shaft end 3-2-1 is transmission-connected to the manual bevel gear portion 3-1-4. The outer diameters of the intermediate shaft section 3-2-2, the end shaft section 3-2-3, and the connecting shaft end 3-2-1 decrease in sequence.

[0062] The manual bevel gear 2 3-3 is sleeved on the top of the worm 4-1 and meshes with the manual bevel gear part 3-1-4;

[0063] A first manual input interface 3-4 and a second manual input interface 3-5 are symmetrically arranged on the rear front side of the main housing 7. The manual straight shaft section 3-1-1 extends into the first manual input interface 3-4, and the end shaft section 3-2-3 extends into the second manual input interface 3-5.

[0064] In this embodiment, the inner side wall of the first manual input interface 3-4 is provided with a first internal thread 3-4-1, the manual straight shaft section 3-1-1 is provided with a first square hole 3-1-2, and the manual bevel gear part 3-1-4 is provided with a connecting circular hole 3-1-3. The connecting circular hole 3-1-3 extends into the manual straight shaft section 3-1-1 and is connected to the first square hole 3-1-2. The cross-sectional area of ​​the connecting circular hole 3-1-3 is larger than the cross-sectional area of ​​the first square hole 3-1-2. The connecting shaft end 3-2-1 is inserted into the connecting circular hole 3-1-3 and is transmission-connected to the manual bevel gear part 3-1-4 through a cylindrical pin;

[0065] The inner side wall of the second manual input interface 3-5 is provided with a second internal thread 3-5-1, and the end shaft section 3-2-3 is provided with a second square hole 3-2-4;

[0066] The manual straight shaft section 3-1-1 and the end shaft section 3-2-3 are both rotatably mounted in the first manual input interface 3-4 and the second manual input interface 3-5 via stamped outer ring needle roller bearings.

[0067] In this embodiment, the cylindrical gear transmission mechanism includes a gear shaft 1 5-1 for mounting the worm gear 4-2, a gear 1 5-2 provided at the other end of the gear shaft 1 5-1, a transition double gear 5-3 meshing with both the gear shaft 1 5-1 and the gear 1 5-2, and a gear shaft 2 5-4 and a gear 2 5-5 meshing with the transition double gear 5-3. Two transition gears are provided at both ends of the transition double gear 5-3, one of the transition gears meshing with the gear of the gear shaft 1 5-1 and the gear of the gear shaft 2 5-4, and the other of the transition gears meshing with the gear 1 5-2 and the gear 2 5-5.

[0068] The gear shaft 1 5-1 and the gear 1 5-2 are coaxially arranged on both sides of the worm gear 4-2 and have the same tooth shape and are aligned; the gear 2 5-5 is arranged at the other end of the gear shaft 2 5-4, and the gear shaft 2 5-4 and the gear 2 5-5 are coaxially arranged and have the same tooth shape and are aligned.

[0069] In this embodiment, the right bevel gear of the bevel gear right output shaft 6-2 and the left bevel gear of the bevel gear left output shaft 6-3 are both engaged with the bevel gear three 6-1, the bevel gear three 6-1 is sleeved on the gear shaft two 5-4 and plugged into the gear two 5-5, and the gear shaft two 5-4, the bevel gear three 6-1 and the gear two 5-5 are coaxially arranged;

[0070] The output ends of the bevel gear right output shaft 6 - 2 and the bevel gear left output shaft 6 - 3 extending out of the main housing 7 are both provided with splines.

[0071] In this embodiment, the worm 4-1 is arranged vertically on the right side of the main housing 7, and the worm wheel 4-2 is arranged on the left side of the main housing 7. The worm 4-1 is a single-start worm, and the worm wheel 4-2 has 33 teeth.

[0072] The lead angle of the worm 4 - 1 is smaller than the equivalent friction angle between the teeth of the meshing worm wheel 4 - 2 .

[0073] In this embodiment, a left inner sleeve 6-3-1 is provided on the left side of the main housing 7, and the left output shaft 6-3 of the bevel gear is rotatably installed in the left inner sleeve 6-3-1 through a left bearing. An outer sleeve 6-3-2 is provided outside the main housing 7, and the left output shaft 6-3 of the bevel gear passes through the main housing 7 and the outer sleeve 6-3-2.

[0074] In this embodiment, a right inner sleeve 6-2-1 and an outer cover plate 6-2-2 cooperating with the right inner sleeve 6-2-1 are provided on the right side of the main housing 7. The right output shaft 6-2 of the bevel gear is rotatably installed in the right inner sleeve 6-2-1 through the right bearing. The outer side wall of the right side of the main housing 7 is flush with the outer side of the outer cover plate 6-2-2, and the right output shaft 6-2 of the bevel gear passes through the main housing 7 and the outer cover plate 6-2-2.

[0075] In this embodiment, in actual use, the length of the left bevel gear output shaft 6 - 3 is greater than the length of the right bevel gear output shaft 6 - 2 .

[0076] In this embodiment, the manual bevel gear 2 3-3 is mounted on the upper end of the worm 4-1 through a pressure plate 3-3-2 and a countersunk screw 3-3-1.

[0077] In this embodiment, the large bevel gear 2-2 is connected to the worm 4-1 through two symmetrical double keys to increase the transmitted torque.

[0078] In this embodiment, the worm 4-1 is rotatably mounted in the main housing 7 through a lower bearing and an upper bearing. A supporting ring 2-2-1 is sleeved on the worm 4-1. The lower end of the supporting ring 2-2-1 is pressed on the inner ring of the upper bearing of the worm 4-1. The upper end of the supporting ring 2-2-1 supports the bottom of the large bevel gear 2-2 in order to adjust the meshing clearance of the secondary bevel gear and make the large bevel gear 2-2, the worm 4-1 and the inner rings of the upper and lower bearings rotate together.

[0079] In this embodiment, a hole retaining ring 2-2-2 is further provided in the main housing 7 to limit the outer ring of the upper bearing.

[0080] In this embodiment, the gear of the gear shaft 1 5 - 1 , the gear 1 5 - 2 , the transition gear, the gear of the gear shaft 2 5 - 4 , and the gear 2 5 - 5 are all rotatably mounted in the main housing 7 via bearings.

[0081] In this embodiment, in actual use, the front side of the main housing 7 is provided with a front mounting hole for installing components such as the worm gear 4-2, the transition double gear 5-3 and the gear 2 5-5, and a front side cover is detachably provided at the front mounting hole.

[0082] In this embodiment, an upper mounting hole for mounting the worm 4 - 1 is provided on the top of the main housing 7 , and a circular cover plate 7 - 1 is provided at the upper mounting hole.

[0083] In this embodiment, the central axis of the sun gear 1-1 and the output shaft hole of the servo motor 10 adopt an interference fit, and a GB / T879.1 heavy elastic cylindrical pin is provided, so that the sun gear 1-1 is connected to the motor shaft safely and reliably.

[0084] In this embodiment, the number of the planetary gears 1 - 2 is three.

[0085] In this embodiment, the planetary shaft 1-4 is cantilevered and mounted on the planetary carrier 1-5, and the three planetary gears 1-2 are engaged with both the sun gear 1-1 and the inner ring gear 1-3 at the same time. The inner ring gear 1-3 is fixed to the inner side wall of the hole of the main housing 7. When the servo motor 10 rotates to drive the sun gear 1-1 to rotate, the planetary gears 1-2 engaged with the sun gear 1-1 rotate and drive the planetary carrier 1-5 to rotate and output.

[0086] Two bearings are used between the planetary gear 1-2 and the planetary shaft 1-4, and a bearing is also provided between the planetary carrier 1-5 and the main housing 7. The planetary gear 1-2 and the planetary carrier 1-5 rotate flexibly without any jamming.

[0087] In this embodiment, the rotation direction of the planet carrier 1-5 is the same as the rotation direction of the sun gear 1-1.

[0088] In this embodiment, in actual use, the reduction ratio of the NGW planetary transmission mechanism is 4.9412, the reduction ratio of the bevel gear mechanism is 2.375, the reduction ratio of the worm gear mechanism is 33, and the reduction ratios of the cylindrical gear transmission mechanism and the bevel gear transmission reverse dual output shaft mechanism are both 1.

[0089] In this embodiment, the gear shaft 1 5-1 and the gear 1 5-2 are provided in order to transmit the output torque of the worm gear 4-2 to the gear shaft 2 5-4 and the gear 2 5-5 through the transition double gear 5-3.

[0090] In this embodiment, due to the limitation of the external dimensions of the main housing 7, the thickness of the main housing 7 is only 51.5 mm, and the worm wheel 4-2 must be located in the middle of the main housing 7 and meshed with the worm 4-1. The cylindrical gear transmission mechanism adopts a double-gear transmission, which can increase the transmission torque to meet the final output torque requirements; in addition, arranging gears on both sides is more conducive to improving the forward and reverse transmission accuracy.

[0091] In this embodiment, the gear shaft 1 5-1 and the gear 1 5-2 have the same tooth profile and are aligned, and the gear shaft 2 5-4 and the gear 2 5-5 have the same tooth profile and are aligned, and they are all cylindrical gears. This is to align the tooth profiles of the two cylindrical gears at both ends, that is, the tooth peaks are aligned with the tooth peaks, and the tooth valleys are aligned with the tooth valleys, so that they are subjected to force at the same time when subjected to force, thereby improving the forward and reverse transmission accuracy.

[0092] In this embodiment, the worm gear transmission mechanism exhibits a self-locking function when the lead angle of worm 4-1 is less than the equivalent friction angle between the teeth of meshing worm wheel 4-2. The coefficient of friction between worm 4-1 and worm wheel 4-2 is 0.6, and the lead angle of worm 4-1 is 3°11′38″, which is less than the equivalent friction angle of 3°29′11″. Therefore, the worm gear transmission mechanism exhibits a self-locking function, enabling reverse self-locking, meaning that only the worm drives the worm wheel, not the worm wheel. This self-locking function serves a crucial safety function, ensuring the safety and reliability of the reducer in the aircraft bomb hoist locking drive system, preventing failure in emergencies such as power outages.

[0093] In this embodiment, when bevel gear three 6-1 rotates in a certain direction driven by coaxially arranged gear shaft two 5-4 and gear two 5-5, the bevel gear right output shaft 6-2 and the bevel gear left output shaft 6-3 will rotate in opposite directions, meeting the use requirements of reverse dual output shafts.

[0094] In this embodiment, gear shaft 1 5-1, gear 1 5-2, transition double gear 5-3, gear shaft 2 5-4 and gear 2 5-5 are set to realize double cylindrical gear transmission at both ends, so that the return clearance is small and the transmission accuracy is high.

[0095] In this embodiment, when in use, the turbine 4-2 and the axis of the gear shaft 1 5-1 and gear 1 5-2, the axis of the transition double gear 5-3, and the axis of the gear shaft 2 5-4 and gear 2 5-5 are lowered in sequence and form a triangle.

[0096] In this embodiment, when in use, the axis of the transition double gear 5-3 is arranged close to the left output shaft 6-3 of the bevel gear.

[0097] In this embodiment, when in use, the axes of the servo motor 10, the NGW-type planetary transmission mechanism, and the small bevel gear 2-1 are located at the same height and at the top of the turbine 4-2.

[0098] When the present invention is used specifically, the servo motor 10 rotates through the NGW type planetary transmission mechanism to drive the small bevel gear 2-1 to rotate, the small bevel gear 2-1 rotates through the large bevel gear 2-2 to drive the worm 4-1 to rotate, and the worm 4-1 rotates to drive the worm wheel 4-2 to rotate; the worm wheel 4-2 rotates to drive the gear shaft 1 5-1 and gear 1 5-2 to rotate, the gear shaft 1 5-1 and gear 1 5-2 rotate through the transition gear of the transition double gear 5-3 to drive the gear shaft 2 5-4 and gear 2 5-5 to rotate, the gear shaft 2 5-4 and gear 2 5-5 rotate to drive the bevel gear 3 6-1 to rotate, and the bevel gear 3 6-1 rotates, then the bevel gear right output shaft 6-2 and the bevel gear left output shaft 6-3 will rotate in opposite directions, meeting the use requirements of reverse dual output shafts.

[0099] In addition, manual operation can also be used in the event of an emergency power outage for ground support. Insert the flexible shaft into the first manual input interface 3-4, insert the central axis of the flexible shaft into the first square hole 3-1-2, and thread the outer wall of the flexible shaft into the first internal thread 3-4-1. The flexible shaft is used to operate the manual straight shaft section 3-1-1 and the manual bevel gear section 3-1-4 to rotate. The manual bevel gear section 3-1-4 rotates, and the manual bevel gear section 3-1-4 rotates, which drives the worm 4-1 to rotate through the manual bevel gear 2 3-3.

[0100] Or through the second manual input interface 3-5, insert the soft shaft into the second manual input interface 3-5, the central axis of the soft shaft is inserted into the second square hole 3-2-4, the outer wall of the soft shaft is threadedly connected to the second internal thread 3-5-1, and the manual shaft 3-2 is rotated by operating the soft shaft. The rotation of the manual shaft 3-2 drives the manual straight shaft section 3-1-1 and the manual bevel gear part 3-1-4 to rotate. The rotation of the manual bevel gear part 3-1-4 drives the worm 4-1 to rotate through the manual bevel gear 2 3-3, thereby realizing the subsequent bevel gear right output shaft 6-2 and the bevel gear left output shaft 6-3 to rotate in opposite directions.

[0101] In summary, the present invention has a simple structure, reasonable design, a large total reduction ratio, and can achieve torque-enhanced transmission. It only requires two reducers, occupies a small space, effectively adapts to the locking drive mechanism of the aircraft bomb hanging hoist system, and has a self-locking function that is reliable and safe.

[0102] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A reverse dual-output shaft multi-stage reducer with self-locking function, characterized by: It comprises a servo motor (10), and an NGW-type planetary transmission mechanism, a bevel gear mechanism, a worm gear mechanism, a cylindrical gear transmission mechanism, and a bevel gear transmission reverse dual output shaft mechanism, which are arranged in a main housing (7) and are sequentially connected in transmission. The worm gear mechanism is also connected to a bidirectional manual input mechanism. The output end of the servo motor (10) is in transmission connection with the NGW type planetary transmission mechanism, the worm gear mechanism comprises a worm (4-1) arranged in a main housing (7) and a worm wheel (4-2) meshing with the worm (4-1), the worm (4-1) being arranged in a vertical direction, the NGW type planetary transmission mechanism is in transmission connection with the bevel gear mechanism, and the bevel gear mechanism and the bidirectional manual input mechanism are both in transmission connection with the worm (4-1); The bidirectional manual input mechanism comprises a manual bevel gear 1 (3-1), a manual shaft (3-2) and a manual bevel gear 2 (3-3); the manual bevel gear 2 (3-3) is sleeved on the top of the worm (4-1) and meshes with the manual bevel gear 1 (3-1); The bevel gear transmission reverse dual output shaft mechanism comprises a bevel gear three (6-1), a bevel gear right output shaft (6-2) and a bevel gear left output shaft (6-3); the bevel gear three (6-1) is connected to the cylindrical gear transmission mechanism.

2. A self-locking dual-output shaft multi-stage reducer according to claim 1, characterized in that: The NGW type planetary transmission mechanism comprises a sun gear (1-1), a plurality of planetary gears (1-2) uniformly distributed along the circumference of the sun gear (1-1) and meshing with the sun gear (1-1), an inner ring gear (1-3) arranged outside the plurality of planetary gears (1-2) and meshing with the planetary gears (1-2), and a planet carrier (1-5) for mounting the plurality of planetary gears (1-2), the planetary gears (1-2) being connected to the planet carrier (1-5) via planetary shafts (1-4), and the inner ring gear (1-3) being arranged on the inner side wall of the main housing (7); The transmission shaft of the sun gear (1-1) is inserted into the shaft of the servo motor (10) and is in transmission connection.

3. The self-locking dual-output shaft multi-stage speed reducer according to claim 1, characterized in that: The bevel gear mechanism comprises a small bevel gear (2-1) sleeved on the end of the planetary carrier (1-5) and a large bevel gear (2-2) meshing with the small bevel gear (2-1), wherein the small bevel gear (2-1) and the large bevel gear (2-2) are orthogonally driven at 90 degrees. The large bevel gear (2-2) is sleeved on the upper end of the worm (4-1).

4. The self-locking dual-output shaft multi-stage speed reducer according to claim 1, characterized in that: The manual bevel gear (3-1) comprises a manual straight shaft section (3-1-1) and a manual bevel gear portion (3-1-4) integrally formed with the manual straight shaft section (3-1-1); the manual shaft (3-2) comprises an integrally formed connecting shaft end (3-2-1), an intermediate shaft section (3-2-2) and an end shaft section (3-2-3); the connecting shaft end (3-2-1) and the manual bevel gear portion (3-1-4) are transmission-connected; the outer diameters of the intermediate shaft section (3-2-2), the end shaft section (3-2-3) and the connecting shaft end (3-2-1) decrease in sequence; The second manual bevel gear (3-3) is sleeved on the top of the worm (4-1) and meshes with the manual bevel gear portion (3-1-4); A first manual input interface (3-4) and a second manual input interface (3-5) are symmetrically arranged on the rear front side of the main housing (7); the manual straight shaft section (3-1-1) extends into the first manual input interface (3-4), and the end shaft section (3-2-3) extends into the second manual input interface (3-5).

5. The inverse dual-output shaft multi-stage speed reducer with self-locking function according to claim 4, characterized in that: The inner side wall of the first manual input interface (3-4) is provided with a first internal thread (3-4-1), the manual straight shaft section (3-1-1) is provided with a first square hole (3-1-2), the manual bevel gear portion (3-1-4) is provided with a connecting circular hole (3-1-3), the connecting circular hole (3-1-3) extends into the manual straight shaft section (3-1-1) and is in communication with the first square hole (3-1-2), the cross-sectional area of ​​the connecting circular hole (3-1-3) is larger than the cross-sectional area of ​​the first square hole (3-1-2), the connecting shaft end (3-2-1) is inserted into the connecting circular hole (3-1-3) and is transmission-connected to the manual bevel gear portion (3-1-4) via a cylindrical pin; The inner side wall of the second manual input interface (3-5) is provided with a second internal thread (3-5-1), and the end shaft section (3-2-3) is provided with a second square hole (3-2-4); The manual straight shaft section (3-1-1) and the end shaft section (3-2-3) are both rotatably mounted in the first manual input interface (3-4) and the second manual input interface (3-5) via a stamped outer ring needle roller bearing.

6. The inverse dual-output shaft multi-stage speed reducer with self-locking function according to claim 1, characterized in that: The cylindrical gear transmission mechanism comprises a gear shaft 1 (5-1) for mounting a worm gear (4-2), a gear 1 (5-2) arranged at the other end of the gear shaft 1 (5-1), a transition double gear (5-3) meshing with both the gear shaft 1 (5-1) and the gear 1 (5-2), and a gear shaft 2 (5-4) and a gear 2 (5-5) meshing with the transition double gear (5-3), two transition gears being arranged at both ends of the transition double gear (5-3), one of the transition gears being meshing with the gear of the gear shaft 1 (5-1) and the gear of the gear shaft 2 (5-4), and the other of the transition gears being meshing with the gear 1 (5-2) and the gear 2 (5-5); The gear shaft 1 (5-1) and the gear 1 (5-2) are coaxially arranged on both sides of the worm wheel (4-2) and have the same tooth shape and are aligned; the gear 2 (5-5) is arranged at the other end of the gear shaft 2 (5-4), and the gear shaft 2 (5-4) and the gear 2 (5-5) are coaxially arranged and have the same tooth shape and are aligned.

7. The self-locking dual-output shaft multi-stage speed reducer according to claim 6, characterized in that: The right bevel gear of the right bevel gear output shaft (6-2) and the left bevel gear of the left bevel gear output shaft (6-3) are both meshed with bevel gear three (6-1); bevel gear three (6-1) is sleeved on gear shaft two (5-4) and plugged into gear two (5-5); gear shaft two (5-4), bevel gear three (6-1) and gear two (5-5) are coaxially arranged; The output ends of the right bevel gear output shaft (6-2) and the left bevel gear output shaft (6-3) extending out of the main housing (7) are both provided with splines.

8. The self-locking dual-output shaft multi-stage speed reducer according to claim 1, characterized in that: The worm (4-1) is arranged vertically on the right side of the main housing (7), and the worm wheel (4-2) is arranged on the left side of the main housing (7). The worm (4-1) is a single-head worm, and the worm wheel (4-2) has 33 teeth. The lead angle of the worm (4-1) is smaller than the equivalent friction angle between the teeth of the meshing worm wheel (4-2).

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