Double-input single-output transmission mechanism based on worm gear self-locking

Abstract

The invention relates to a double-input single-output transmission mechanism based on worm gear self-locking, which comprises a worm box, a worm, worm gear teeth, speed reducer internal meshing teeth, speed reducer planetary teeth, a speed reducer input shaft, a speed reducer output shaft, a composite tooth support bearing, a motor shaft, a motor and a motor brake, and the worm gear teeth are meshed with the worm. According to the double-input single-output transmission mechanism based on worm gear self-locking, through the structural self-locking characteristic of worm transmission, a gear ring of the speed reducer is locked, and the speed reducer is combined with a motor band-type brake, so that an output shaft of the speed reducer is in a locked state after the motor is powered off; under the emergency manual condition, after the motor is powered off, the motor brake locks the input shaft of the speed reducer, the worm is manually rotated, the composite gear ring is driven to rotate through the worm, the output shaft of the speed reducer is driven to rotate, manual transmission is achieved, the high transmission efficiency on a motor transmission path is considered, and the manual emergency use function after power failure can also be considered.

Description

Technical Field

[0001] The invention relates to the technical field of lifting and leveling transmission of equipment and vehicle platforms, and in particular to a double-input single-output transmission mechanism based on worm gear self-locking. Background Art

[0002] The electric lifting mechanisms and leveling legs of existing engineering vehicles, military equipment, vehicles and platforms all use the screw rotation motion to convert into linear motion to achieve a large lifting force, and the lifting mechanism has a self-locking function after power failure. There are two main technical means for locking the electric lift power failure: (1) using a rolling screw combined with a motor brake to lock the screw transmission mechanism through the motor power failure brake. (2) using a trapezoidal screw and using the self-locking characteristics of the sliding screw to achieve the locking of the screw alone.

[0003] In the above two forms, the power output transmission chain adopts the rolling screw method, which has the advantages of high transmission efficiency, low motor drive power loss, small screw drive torque, and small power transmission mechanism on the transmission chain, including motor power, reducer torque, and gear load specifications. However, the transmission chain does not have a self-locking function, and the motor brake is required to lock the transmission chain after power failure. For occasions where there is an emergency manual retraction and extension requirement after power failure or failure, the transmission chain needs to release the brake, and the manual process can only be completed in coordination with the brake, which is extremely inconvenient to operate. The transmission chain is not self-locking, and it is also extremely dangerous for operators under high load. In addition, once the motor fails and the brake cannot be released, the manual operation task cannot be completed; while the trapezoidal screw method is adopted, although the screw can be self-locking, the transmission efficiency of the self-locking sliding screw is extremely low, and the screw drive torque requirement under the same lead and load conditions is extremely large. In order to meet the demand, it can only be achieved by increasing the motor power, increasing the reducer speed ratio and load specifications, increasing the gear module specifications, reducing the screw lead, and reducing the lifting speed. In other ways, the transmission cost is increased.

[0004] At present, the application in this field has not been able to effectively take both into account. In order to meet the safety requirements of self-locking and manual operation at the same time, the transmission method used in this application field is still a combination of non-brake motor and sliding self-locking screw. It is inevitable that the lifting force under the same motor power and reduction ratio conditions is difficult to meet, and it also causes huge power waste for the system. Summary of the invention

[0005] In order to solve the above-mentioned contradictions, especially for the lifting and leveling transmission requirements of military equipment and vehicles with emergency manual operation. The present invention proposes a dual-input single-output planetary transmission mechanism based on worm gear self-locking, which uses the self-locking characteristics of the worm gear transmission and the brake of the drive motor to constrain the inner gear ring and input shaft of the planetary reducer, so that the reducer has two independent self-locking paths, and the electric lifting transmission chain does not need to use a sliding screw with low transmission efficiency, and can meet the self-locking function after the lifting stops. The present invention not only meets the high transmission efficiency of the motor transmission chain, but also takes into account the emergency manual function, effectively solving the technical problem of meeting both requirements in this application field.

[0006] To solve the above technical problems, the present invention provides a dual-input single-output transmission mechanism based on worm gear self-locking, comprising: a worm box, a worm, worm wheel teeth, reducer internal meshing teeth, reducer planetary gears, reducer input shaft, reducer output shaft, compound tooth support bearing, motor shaft, motor and motor brake; wherein, the motor shaft is connected to the output end of the motor, the motor brake is arranged on the motor, and the motor brake is used to lock the motor shaft, the motor shaft is connected to the reducer input shaft, the reducer input shaft is connected to the reducer output shaft through the reducer planetary gears, the reducer planetary gears are arranged on the worm box through the compound tooth support bearing, the worm wheel teeth are connected to the reducer planetary gears through the reducer internal meshing teeth, and the worm wheel teeth are meshed with the worm. The transmission mechanism of the present invention with dual input and single output based on worm gear self-locking can lock the gear ring of the reducer through the self-locking characteristic of the worm gear transmission structure, and can be combined with the motor brake to realize that the output shaft of the reducer is in a locked state after the motor is powered off; in an emergency manual situation, after the motor is powered off, the motor brake locks the input shaft of the reducer, and the worm is manually rotated to drive the composite gear ring to rotate, thereby driving the output shaft of the reducer to rotate and realize manual transmission. The transmission mechanism of the present invention is used when there is a need for manual drive and high-efficiency motor transmission, and can avoid the use of low-transmission-efficiency sliding self-locking transmission in the motor drive path, taking into account the high transmission efficiency on the motor transmission path, and taking into account the manual emergency use function after power failure, effectively solving the contradiction between the two requirements under the traditional transmission form.

[0007] In one embodiment of the present invention, the motor and the motor brake constitute a belt brake motor, the worm box, worm, worm gear, reducer internal meshing teeth, reducer planetary gears, reducer input shaft and reducer output shaft constitute a dual-input single-output transmission module, the dual-input single-output transmission module is connected to a screw drive module, and the belt brake motor is connected to the screw drive module via the dual-input single-output transmission module.

[0008] In one embodiment of the present invention, the worm gear box includes a reducer part, a worm gear box housing and a worm speed increasing mechanism, the reducer part and the worm speed increasing mechanism are both arranged in the worm gear box housing, and the reducer part and the worm speed increasing mechanism are meshed, one end of the worm speed increasing mechanism is set as a worm low-speed manual end, and the other end of the worm speed increasing mechanism is set as a worm high-speed driving end, and the input end of the reducer part is connected to a motor with a brake.

[0009] In one embodiment of the present invention, the worm gear speed increasing mechanism includes a speed increasing shaft and a worm, the speed increasing shaft is connected to the worm high driving end, the worm is arranged in a worm box housing, one end of the worm is connected to the speed increasing shaft, and the other end of the worm is arranged as a worm low speed manual end, and the reducer part is meshed with the worm.

[0010] In one embodiment of the present invention, the reducer part includes a compound ring gear, planetary meshing teeth, a reducer drive shaft and a speed increaser, the outer ring gear of the compound ring gear is meshed with the worm, and the inner ring gear of the compound ring gear is meshed with the planetary meshing teeth, the planetary meshing teeth are connected to the reducer drive shaft, and the planetary meshing teeth are connected to the worm height drive end through the speed increaser.

[0011] In one embodiment of the present invention, the outer ring of the composite gear ring is provided with worm gear teeth, the inner ring of the composite gear ring is provided with reduction transmission internal meshing teeth, the worm is meshed with the worm gear teeth, and the reduction transmission internal meshing teeth are meshed with the planetary meshing teeth.

[0012] In one embodiment of the present invention, the output end of the reducer part is connected to a gear transmission assembly, and the gear transmission assembly includes a driving gear and a screw driving gear. The driving gear is connected to the output end of the reducer part, the driving gear is meshed with the screw driving gear, and the screw driving gear is connected to the screw driving module.

[0013] In one embodiment of the present invention, the screw drive module includes a rolling screw, a screw nut, a push rod and a housing, the rolling screw is connected to the screw drive gear, the screw nut and the rolling screw are threadedly connected, one end of the push rod is connected to the screw nut, the push rod is arranged in the housing, and the push rod can slide in the housing.

[0014] In one embodiment of the present invention, two ends of the worm are connected with worm support bearings, and the worm support bearings are arranged in a worm box housing.

[0015] In one embodiment of the present invention, a manual interface at a speed-increasing end and a manual interface at a low-speed end are respectively provided at both ends of the reducer part.

[0016] The above technical solution of the present invention has the following beneficial effects compared with the prior art: The dual-input single-output transmission mechanism based on worm gear self-locking described in the present invention, on the one hand, locks the inner meshing gear ring of the reduction transmission assembly through the self-locking meshing of the worm and worm gear, and bears the supporting reaction force of the load of the reduction assembly through the worm support bearing, so that the reduction transmission assembly can complete the speed reduction and torque increase of the output mechanism under the drive of the motor, and drive the external load mechanism to move; on the other hand, after the motor is powered off, the motor brake locks the input shaft of the reduction transmission assembly, and the reduction assembly gear ring can be driven by manually rotating the worm to complete the rotation of the reduction assembly output mechanism; on the other hand, the present invention adopts a self-locking worm, and after the manual rotation of the worm stops, the worm can automatically lock the reduction assembly; on the other hand, the inner meshing gear ring of the reduction transmission assembly is locked by the worm and the transmission shaft is locked by the motor brake, so that the reduction transmission assembly has two independent self-locking, and the electric lifting transmission chain does not need to use a sliding screw with low transmission efficiency, and the self-locking function after the lifting stops can be met, which not only meets the high transmission efficiency of the motor transmission chain, but also takes into account the emergency manual function, and effectively solves the technical contradiction problem of both meeting the requirements in the current application field. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein Figure 1 It is a transmission principle diagram of a transmission mechanism with double input and single output based on worm gear self-locking in a preferred embodiment of the present invention; Figure 2 It is a structural schematic diagram of a dual-input single-output transmission mechanism based on worm gear self-locking in a preferred embodiment of the present invention; Figure 3 Schematic diagram of the composition of a transmission mechanism with double input and single output based on worm gear self-locking in a preferred embodiment of the present invention Figure 1 ; Figure 4 Schematic diagram of the composition of a transmission mechanism with double input and single output based on worm gear self-locking in a preferred embodiment of the present invention Figure 2 ; Figure 5 It is a schematic diagram of the composition of a transmission module with double input and single output based on worm self-locking in a preferred embodiment of the present invention; Figure 6 It is a schematic diagram of the structure of the composite gear ring in the preferred embodiment of the present invention; Figure 7 Schematic diagram of the application structure of the "L-shaped" leveling lifting legs in the preferred embodiment of the present invention Figure 1 ; Figure 8 Schematic diagram of the application structure of the "L-shaped" leveling lifting legs in the preferred embodiment of the present invention Figure 2 ; Fig. 9Schematic diagram of the application structure of the "I-type" leveling lifting legs in the preferred embodiment of the present invention Figure 1 ; Fig.10 Schematic diagram of the application structure of the "I-type" leveling lifting legs in the preferred embodiment of the present invention Figure 2 ; Fig.11 It is a schematic diagram of the combination of the preferred embodiment of the present invention and the planetary reducer structure; Fig.12 It is a schematic diagram of the combination of the preferred embodiment of the present invention and the cycloid reducer with a small tooth difference structure.

[0018] Description of the accompanying drawings: 1-worm box; 2-worm; 3-worm gear; 4-speed reducer internal meshing gear; 5-speed reducer planetary gear; 6-speed reducer input shaft; 7-speed reducer output shaft; 8-compound tooth support bearing; 9-motor shaft; 10-motor; 11-motor brake; 12-speed reducer part; 13-worm box; 14-worm low speed manual end; 15-worm speed increase mechanism; 16-worm height drive end; 17-speed increase shaft; 18-worm; 19- Compound gear ring; 20-planetary meshing teeth; 21-reducer drive shaft; 22-speed increaser; 23-dual-input single-output transmission module; 24-brake motor; 25-driving gear; 26-screw drive gear; 27-rolling screw; 28-screw nut; 29-push rod; 30-housing; 31-worm gear; 32-reduction transmission internal meshing teeth; 33-worm support bearing; 34-speed increase end manual interface; 35-low speed end manual interface; 36-planetary gear; 37-involute internal teeth; 38-planetary output mechanism; 39-motor seat; 40-small tooth difference output mechanism; 41-pin teeth; 42-cycloid teeth. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0020] The transmission mechanism with dual input and single output based on worm gear self-locking of the present invention is mainly aimed at, but not limited to, electric lifting mechanisms and leveling legs of engineering vehicles, military equipment, vehicles and platforms. The composite gear ring adopted in the structure of the present invention has external teeth that are self-locking worm gear teeth, and internal teeth that are internal meshing teeth that participate in the reduction transmission. The gear ring is locked by the independent worm and the input shaft of the reduction assembly is locked by the motor brake, which not only achieves the goal of not using a sliding screw with low transmission efficiency on the electric lifting transmission chain, but also satisfies the transmission self-locking after the lifting stops, and also achieves the requirement of manually rotating the worm to drive the load transmission chain mechanism after the motor is powered off. Example

[0021] Reference Figure 1-10As shown, the transmission mechanism with double input and single output based on worm gear self-locking of the present invention comprises: a worm box 1, a worm 2, worm wheel teeth 3, reducer internal meshing teeth 4, reducer planetary gears 5, reducer input shaft 6, reducer output shaft 7, compound tooth support bearing 8, motor shaft 9, motor 10 and motor brake 11; wherein, the motor shaft 9 is connected to the output end of the motor 10, the motor brake 11 is arranged on the motor 10, and the motor brake 11 is used to lock the motor shaft 9, the motor shaft 9 is connected to the reducer input shaft 6, the reducer input shaft 6 is connected to the reducer output shaft 7 through the reducer planetary gears 5, the reducer planetary gears 5 are arranged on the worm box 1 through the compound tooth support bearing 8, the worm wheel teeth 3 are connected to the reducer planetary gears 5 through the reducer internal meshing teeth 4, and the worm wheel teeth 3 are meshed with the worm 2. The motor 10 includes a motor with a brake and a motor without a brake. The worm gear self-locking double-input planetary transmission mechanism is connected to the motor with a brake, and its motor transmission chain can adopt a high transmission efficiency non-self-locking mechanism to achieve transmission locking through the motor brake; the worm gear self-locking double-input planetary transmission is connected to the motor without a brake, and its motor transmission chain can adopt a self-locking sliding screw, and its transmission form is equivalent to the motor, reducer, and self-locking trapezoidal screw transmission adopted by the traditional self-locking lifting mechanism.

[0022] In the above structure, the motor 10 and the motor brake 11 constitute a motor with brake 24, the worm box 1, the worm 2, the worm gear 3, the reducer internal meshing teeth 4, the reducer planetary gears 5, the reducer input shaft 6 and the reducer output shaft 7 constitute a dual-input single-output transmission module 23, the dual-input single-output transmission module 23 is connected to a screw drive module, and the motor with brake 24 is connected to the screw drive module via the dual-input single-output transmission module 23.

[0023] In the above structure, the worm box 1 includes a reducer part 12, a worm box housing 13 and a worm speed increasing mechanism 15, the reducer part 12 and the worm speed increasing mechanism 15 are both arranged in the worm box housing 13, and the reducer part 12 and the worm speed increasing mechanism 15 are meshed, one end of the worm speed increasing mechanism 15 is set as the worm low speed manual end 14, and the other end of the worm speed increasing mechanism 15 is set as the worm high speed driving end 16, and the input end of the reducer part 12 is connected with a brake motor 24. The worm speed increasing mechanism 15 is a planetary transmission reducer, a manual interface is set at its driving end, and its output end is connected to the worm, and the speed increasing drive assembly drives the worm to rotate at a higher speed through the speed increasing transmission, which is used to increase the manual driving speed. The speed of the manually driven worm is increased by the speed increasing transmission, and the speed increasing form includes but is not limited to planetary speed increasing, gearbox speed increasing, and harmonic back drive speed increasing.

[0024] In the above structure, the worm speed increasing mechanism 15 includes a speed increasing shaft 17 and a worm 18, the speed increasing shaft 17 is connected to the worm height driving end 16, the worm 18 is arranged in the worm box housing 13, one end of the worm 18 is connected to the speed increasing shaft 17, and the other end of the worm 18 is arranged as the worm low speed manual end 14, and the reducer part 12 is meshed with the worm 18. The two ends of the worm 18 are connected to the worm support bearings 33, and the worm support bearings 33 are arranged in the worm box housing 13.

[0025] In the above structure, the reducer part 12 includes a compound gear ring 19, planetary meshing teeth 20, a reducer drive shaft 21 and a speed increaser 22. The outer gear ring of the compound gear ring 19 meshes with the worm 18, and the inner gear ring of the compound gear ring 19 meshes with the planetary meshing teeth 20. The planetary meshing teeth 20 are connected to the reducer drive shaft 21, and the planetary meshing teeth 20 are connected to the worm height drive end 16 through the speed increaser 22. The reducer part 12 is a planetary transmission type reducer, including but not limited to a planetary reducer, a cycloid reducer, a small tooth difference involute reducer, and a harmonic reducer. Its inner meshing gear ring is a compound gear ring, and the inner teeth participate in the planetary reduction and torque increase transmission of the reducer. Its input shaft is connected to the motor with a brake, and its output mechanism is connected to the load.

[0026] In the above structure, the outer ring of the compound gear ring 19 is provided with worm gear teeth 31, and the inner ring of the compound gear ring 19 is provided with reduction transmission internal meshing teeth 32, the worm 18 is meshed with the worm gear teeth 31, and the reduction transmission internal meshing teeth 32 are meshed with the planetary meshing teeth 20. The compound gear ring 19 includes internal and external teeth, the external teeth are the worm gear teeth 31 meshing with the worm 18, the worm coefficient meets the self-locking, and the internal teeth are the teeth participating in the internal meshing transmission of the reducer, including but not limited to involute teeth, cycloid teeth, and pin teeth. The compound gear ring 19 is installed in the worm box 13 through a support bearing, and forms a worm transmission pair with the worm 18; the support bearing includes but is not limited to a sliding bearing and a rolling bearing; the worm 18 is installed in the worm box 13 through a worm support bearing 33, and its front and rear ends are provided with connection interfaces, which serve as a low-speed drive end and a high-speed drive end respectively, and the high-speed drive end is connected to the speed increase drive assembly.

[0027] In the above structure, the output end of the reducer part 12 is connected to a gear transmission assembly, and the gear transmission assembly includes a driving gear 25 and a screw drive gear 26. The driving gear 25 is connected to the output end of the reducer part 12, the driving gear 25 is meshed with the screw drive gear 26, and the screw drive gear 26 is connected to the screw drive module.

[0028] In the above structure, the screw drive module includes a rolling screw 27, a screw nut 28, a push rod 29 and a housing 30. The rolling screw 27 is connected to the screw drive gear 26, the screw nut 28 is threadedly connected to the rolling screw 27, one end of the push rod 29 is connected to the screw nut 28, the push rod 29 is arranged in the housing 30, and the push rod 29 can slide in the housing 30.

[0029] In the above structure, the two ends of the speed reducer part 12 are respectively provided with a speed increasing end manual interface 34 and a low speed end manual interface 35 .

[0030] The dual-input single-output transmission mechanism based on worm gear self-locking of the present invention comprises a self-locking worm transmission assembly, a compound gear ring 19, a worm speed increasing mechanism 15, a speed reducer part 12 and a motor with brake 24. The self-locking worm transmission assembly includes a worm 18, a worm support bearing 33, a low-speed end manual interface 35, a worm box 13, a compound gear ring 19 and a gear ring support bearing, etc. The worm 18 is installed in the worm box 13 through the worm support bearing 33. Drive interfaces are set at both ends of the worm 18, one end is used for low-speed drive, and the other end is used to connect the speed-increasing drive assembly. The compound gear ring 13 is characterized in that two tooth shapes are set inside and outside. The external teeth are worm gear teeth 31, and the turbine teeth 31 mesh with the worm 18 and have a self-locking function. The internal teeth of the compound gear ring 19 are the internal meshing teeth of the reducer, the internal meshing teeth 32 of the reduction transmission, and the internal meshing teeth 32 of the reduction transmission can be involute teeth or cycloid pin teeth. The internal meshing teeth 32 of the reduction transmission participate in the speed reduction and torque increase transmission of the reducer, and the turbine teeth 31 participate in the worm meshing and have a stop self-locking function. The compound gear ring 19 is installed in the worm box 13 through the support bearing, and can drive the output shaft of the reducer under the drive of the worm 18. The worm speed increasing mechanism 15 is used to drive the worm 18 at high speed. Its input shaft is connected to the worm 18, and its driving interface is set on the output mechanism. By driving the output mechanism, the worm 18 rotates at high speed, which is used to quickly drive the output shaft of the reducer. The brake motor 24 is the active device of the transmission mechanism. The brake motor 24 is connected to the input shaft of the reducer. Due to the self-locking function of the worm, the reducer gear ring is locked. The brake motor 24 rotates and decelerates through the reducer, so that the output shaft is decelerated and the torque is increased. The brake motor 24 is powered off and the brake locks the reducer input shaft, and the transmission is automatically locked.

[0031] The dual-input single-output transmission mechanism based on worm gear self-locking of the present invention locks the reducer gear ring through the worm gear. The compound teeth include internal and external integrated compound teeth and internal and external split combined compound teeth. The worm gear locking reducer gear ring forms include but are not limited to ZA, ZN, ZI, ZC and toroidal worm self-locking transmission forms. Example

[0032] Reference Figure 7 , 8As shown, the present invention is used for "L" type leveling legs, the worm gear box 13 is installed on the leg gear box base by screws, and is positioned with the base by a straight mouth, the output shaft of the reduction transmission assembly is connected to the driving gear, the brake motor 24 is powered on and rotates, the motor shaft 9 drives the reduction gear group to mesh and rotate to drive the driving gear 25 to rotate, the driving gear 25 is meshed with the lead screw driving gear 26, and drives the rolling screw 27 to rotate, the rolling screw 27 rotates and drives the screw nut 28 to move linearly, the screw 27 adopts a rolling screw including a planetary roller screw and a ball screw, the screw nut 28 is connected to the push rod 29 by screws, and the high transmission efficiency rolling screw 27 provides a large linear thrust for the push rod 29, due to The rolling screw 27 does not have the self-locking ability. After the motor 24 with brake is powered off, the motor brake 11 locks the motor shaft 9, and then locks the input shaft of the reduction transmission component. Due to the self-locking of the worm 18, the worm 18 and the outer worm gear teeth of the compound gear ring 19 are locked, and the output mechanism of the reduction component is locked; in emergency situations such as power failure or motor failure, the motor brake 11 has locked the input shaft of the reduction component, and the worm speed increase mechanism 15 is driven through the manual interface. The worm speed increase mechanism 15 drives the worm 18 to rotate rapidly, and then drives the inner meshing gear ring of the reducer part 12, driving the output mechanism of the reduction component to rotate, and the leveling leg screw is quickly retracted or extended through manual drive; when manual drive is required to provide a large load thrust. The worm 18 is directly driven through the worm manual interface, and the meshing of the worm 18 and the worm gear teeth is decelerated and torque increased, so that the manual slow-speed drive of the reduction component output shaft can be realized. Low-speed and high-torque rotation. Example

[0033] Reference Fig. 9 , 10As shown, the present invention is used for "I" type leveling legs, the worm gear box 13 is installed on the leg gear box base by screws, and is positioned with the base by a straight mouth, the output shaft of the reduction transmission assembly is connected to the driving screw, the motor 24 with brake is energized and rotates, the motor shaft 9 drives the reduction gear set to mesh and rotate to drive the screw to rotate, and the rotation of the screw drives the screw nut 28 to move linearly, the screw adopts a rolling screw 27 including a planetary roller screw and a ball screw, the screw nut 28 is connected to the push rod 29 by screws, and the high transmission efficiency rolling screw 27 provides a large linear thrust for the push rod 29. Because the rolling screw 27 does not have a self-locking ability, the brake After the motor 24 is powered off, the motor brake 11 locks the motor shaft, and then locks the input shaft of the reduction transmission assembly. Due to the self-locking of the worm 18, the worm 18 and the outer worm gear teeth of the compound gear ring 19 are locked, and the output mechanism of the reduction assembly is locked; in emergency situations such as power failure or motor failure, the motor brake 11 has locked the input shaft of the reduction assembly, and the worm speed increase mechanism 15 is driven through the manual interface. The worm speed increase mechanism 15 drives the worm 18 to rotate rapidly, and then drives the meshing gear ring in the reduction assembly, driving the output mechanism of the reduction assembly to rotate, and the leveling leg screw is quickly retracted or extended through manual drive; when manual drive is required to provide a large load thrust. The worm 18 is directly driven through the worm manual interface, and the meshing of the worm 18 and the worm gear teeth is used to reduce speed and increase torque, so as to realize manual slow-speed driving of the reduction assembly output shaft to rotate at low speed and high torque. Example

[0034] Reference Fig.11 As shown, when the present invention is used in combination with a planetary reducer, the inner teeth of the worm self-locking compound gear ring are the involute teeth of the planetary reducer. The motor with brake 24 is connected to the central sun gear of the planetary reducer. After the motor is powered off, the motor brake 11 locks the central sun gear, drives the compound gear ring through the worm 18, drives the planetary gear set and the compound gear ring 19 to mesh with each other, and drives the output mechanism to rotate. Example

[0035] Reference Fig.12 As shown, when the present invention is used in combination with a cycloidal pinwheel reducer, the inner teeth of the worm self-locking compound gear ring are the internal meshing pin teeth of the cycloidal pinwheel reducer. The motor with brake 24 is connected to the input shaft of the cycloidal reducer. After the motor is powered off, the motor brake 11 locks the input shaft, drives the compound gear ring 19 through the worm 18, drives the internal meshing transmission of the cycloidal teeth 42 and the compound gear ring 19, and drives the output mechanism to rotate.

[0036] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A dual-input single-output transmission mechanism based on worm gear self-locking, characterized in that: include: Worm gear box, worm, worm gear, reducer internal meshing gear, reducer planetary gear, reducer input shaft, reducer output shaft, composite gear support bearing, motor shaft, motor and motor brake; Wherein, the motor shaft is connected to the output end of the motor, the motor brake is arranged on the motor, and the motor brake is used to lock the motor shaft, the motor shaft is connected to the reducer input shaft, the reducer input shaft is connected to the reducer output shaft through the reducer planetary gears, the reducer planetary gears are arranged on the worm box through the composite tooth support bearing, the worm wheel teeth are connected to the reducer planetary gears through the reducer internal meshing teeth, and the worm wheel teeth are meshed with the worm.

2. The transmission mechanism with double input and single output based on worm gear self-locking according to claim 1, characterized in that: The motor and the motor brake constitute a belt brake motor, the worm box, the worm, the worm gear, the reducer internal meshing teeth, the reducer planetary gears, the reducer input shaft and the reducer output shaft constitute a dual-input single-output transmission module, the dual-input single-output transmission module is connected to a screw drive module, and the belt brake motor is connected to the screw drive module via the dual-input single-output transmission module.

3. The double-input single-output transmission mechanism based on worm gear self-locking according to claim 2 is characterized in that: The worm gear box includes a reducer part, a worm gear box housing and a worm speed-increasing mechanism. The reducer part and the worm speed-increasing mechanism are both arranged in the worm gear box housing, and the reducer part and the worm speed-increasing mechanism are meshed. One end of the worm speed-increasing mechanism is set as a worm low-speed manual end, and the other end of the worm speed-increasing mechanism is set as a worm high-speed driving end. The input end of the reducer part is connected to a motor with a brake.

4. The double-input single-output transmission mechanism based on worm gear self-locking according to claim 3 is characterized in that: The worm speed increasing mechanism includes a speed increasing shaft and a worm, the speed increasing shaft is connected to the high driving end of the worm, the worm is arranged in a worm box housing, one end of the worm is connected to the speed increasing shaft, and the other end of the worm is arranged as a low-speed manual end of the worm, and the reducer part is meshed with the worm.

5. The double-input single-output transmission mechanism based on worm gear self-locking according to claim 5 is characterized in that: The reducer part includes a compound gear ring, planetary meshing teeth, a reducer drive shaft and a speed increaser. The outer gear ring of the compound gear ring is meshed with the worm, and the inner gear ring of the compound gear ring is meshed with the planetary meshing teeth. The planetary meshing teeth are connected to the reducer drive shaft, and the planetary meshing teeth are connected to the worm height drive end through the speed increaser.

6. The transmission mechanism with double input and single output based on worm gear self-locking according to claim 5, characterized in that: The outer ring of the composite gear ring is provided with worm gear teeth, the inner ring of the composite gear ring is provided with reduction transmission internal meshing teeth, the worm is meshed with the worm gear teeth, and the reduction transmission internal meshing teeth are meshed with the planetary meshing teeth.

7. The transmission mechanism with double input and single output based on worm gear self-locking according to claim 3, characterized in that: The output end of the reducer part is connected to a gear transmission assembly, which includes a driving gear and a screw drive gear. The driving gear is connected to the output end of the reducer part, the driving gear is meshed with the screw drive gear, and the screw drive gear is connected to the screw drive module.

8. The transmission mechanism with double input and single output based on worm gear self-locking according to claim 7, characterized in that: The lead screw drive module includes a rolling screw, a lead screw nut, a push rod and a housing. The rolling screw is connected to the lead screw drive gear, the lead screw nut is threadedly connected to the rolling screw, one end of the push rod is connected to the lead screw nut, the push rod is arranged in the housing, and the push rod can slide in the housing.

9. The transmission mechanism with double input and single output based on worm gear self-locking according to claim 4, characterized in that: Both ends of the worm are connected with worm support bearings, and the worm support bearings are arranged in a worm box housing.

10. The transmission mechanism with double input and single output based on worm gear self-locking according to claim 3, characterized in that: The two ends of the speed reducer part are respectively provided with a speed increasing end manual interface and a low speed end manual interface.

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