A single-source multi-drive push rod with a two-way mechanical self-locking structure

Abstract

The present invention belongs to the technical field of telescopic linear motion devices, and particularly relates to a single-source multi-drive push rod with a two-way mechanical self-locking structure, which includes a drive motor assembly, a single-worm multi-worm gear transmission assembly, a telescopic rod assembly, and a two-way mechanical self-locking structure. The single-worm multi-worm gear transmission assembly is placed in a transmission housing. The single-worm multi-worm gear transmission assembly includes a worm and multiple pairs of worm gears. The drive motor assembly is connected to one end of the worm. The two worm gears of each pair of worm gears are engaged on both sides of the worm. The upper end of each worm gear is fixedly connected to a two-way mechanical self-locking structure, and the upper end of each two-way mechanical self-locking structure is fixedly connected to a telescopic rod assembly. The present invention simultaneously has a mechanical two-way self-locking function. The telescopic rod assembly is provided with a safety nut protection structure, which solves the problem of poor transmission load force of some parts of the traditional push rod, and realizes precise and safe drive with small volume, high load, and high speed.

Description

Technical Field

[0001] The present invention belongs to the technical field of telescopic linear motion devices, and particularly relates to a single-source multi-drive push rod with a two-way mechanical self-locking structure. Background Art

[0002] At present, in most electric push rods with worm and worm gear transmission, due to the meshing friction transmission of the worm and worm gear part, there is a poor load capacity. For good meshing, the materials generally used for the worm wheel are copper alloy and non-metal, etc., and the worm generally uses high-strength alloy steel. The contact strength and bending strength of the worm wheel are much smaller than those of the worm. During the transmission process, usually the performance of the worm wheel reaches the limit, while the worm has a large margin of performance. For the transmission at the telescopic part of the push rod, in order to save costs, a friction-driven lead screw is usually selected, and a non-metal nut is often selected. Then the strength of the nut is much lower than that of the mating alloy lead screw. During use, usually the performance of the nut reaches the limit, while the lead screw has sufficient surplus performance. Therefore, if the overall parameters are to be improved, the performance of both the worm and worm gear transmission part and the lead screw transmission part needs to be improved simultaneously.

[0003] Currently, in some individual scenarios, two electric push rods are used for simultaneous drive. However, in this case, it is necessary to control the two electric push rods to move simultaneously, otherwise the force will be inconsistent. This requires the drive sources to move completely in unison, which usually requires a servo system to achieve, resulting in extremely high costs. And two upper and lower mounting points are required for each of the two push rods. It is very difficult to ensure that the distances between the upper and lower mounting points of the two push rods are exactly the same. Usually, it is also very difficult to ensure the tolerance of the two mounting points during the installation of a single electric push rod. The poor tolerance of the upper and lower mounting points affects the service life of the push rod. Currently, some push rods using a universal hinge connection will increase the installation length, but cannot solve the problem of the exact consistency of the two push rod mounting points.

[0004] During the use of electric push rods, self-locking is usually required, or double self-locking is required in special industries to ensure safety performance. Generally, self-locking is achieved through worm and worm gear self-locking, lead screw self-locking or electromagnetic braking. Self-locking through worm and worm gear or lead screw will result in extremely low transmission efficiency, and electromagnetic braking requires an additional control circuit and is prone to failure. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a single-source multi-drive push rod with a two-way mechanical self-locking structure.

[0006] The present invention is implemented as follows: a single-source multi-drive push rod with a two-way mechanical self-locking structure is provided, which includes a drive motor assembly, a single-worm multi-worm-wheel transmission assembly, a telescopic rod assembly, and a two-way mechanical self-locking structure. The single-worm multi-worm-wheel transmission assembly is placed in a transmission housing. The single-worm multi-worm-wheel transmission assembly includes a worm and multiple pairs of worm wheels. The drive motor assembly is connected to one end of the worm. The two worm wheels of each pair of worm wheels are engaged on both sides of the worm. The upper end of each worm wheel is fixedly connected to a two-way mechanical self-locking structure, and the upper end of each two-way mechanical self-locking structure is fixedly connected to a telescopic rod assembly.

[0007] Preferably, each of the two-way mechanical self-locking structures includes a brake lower claw, a brake upper claw, a two-way brake holding spring, and a friction seat. The brake lower claw and the brake upper claw have the same structure, and both include a connecting disk and a plurality of clamping claws that are integrated with the connecting disk and are vertically arranged. The clamping claws of the brake lower claw and the brake upper claw are opposite and cross-arranged. The two-way brake holding spring is sleeved outside the brake lower claw and the brake upper claw. The lower end of the two-way brake holding spring is provided with a downwardly bent lower elbow, and the upper end is provided with an upwardly bent upper elbow. The lower elbow and the upper elbow respectively extend between two adjacent clamping claws of the corresponding brake lower claw and brake upper claw. The friction seat is sleeved outside the two-way brake holding spring and is installed between the two-way brake holding spring and the transmission housing; the upper end of each worm wheel is fixedly connected to the connecting disk of the brake lower claw, and the connecting disk of the brake upper claw is fixedly connected to the telescopic rod assembly.

[0008] Preferably, the telescopic rod assembly includes a screw rod, a load nut, a telescopic rod, a telescopic rod guide sleeve, and an outer support cylinder. The upper end of each two-way mechanical self-locking structure is fixedly connected to the lower end of a screw rod. The load nut is in threaded cooperation with the screw rod. The screw threads of the two screw rods above each pair of worm wheels have opposite directions. The telescopic rod is sleeved outside the screw rod and the lower end is fixedly connected to the load nut. The telescopic rod guide sleeve is sleeved outside the telescopic rod and is in sliding cooperation with the telescopic rod. The load nut and the telescopic rod make telescopic linear motion as the screw rod rotates. The outer support cylinder is sleeved outside the telescopic rod guide sleeve, the telescopic rod, and the load nut. The upper end of the telescopic rod is fixedly connected to an upper end cover of the telescopic rod, and the outside of the upper end cover of the telescopic rod is used to connect to the device to be driven.

[0009] Further preferably, a safety nut guide sleeve is fixedly connected to the lower end of the load nut. A safety nut is threadedly connected to the screw rod inside the safety nut guide sleeve. The outside of the safety nut is in sliding cooperation with the safety nut guide sleeve to limit the rotation of the safety nut. The lower end of the safety nut guide sleeve is integrally provided with a safety nut snap ring to prevent the safety nut from coming out. The distance between the safety nut snap ring and the lower end of the load nut is greater than the height of the safety nut.

[0010] Further preferably, a load nut snap ring is provided at the upper end of the screw rod, and the outer diameter of the load nut snap ring is greater than the outer diameter of the screw rod.

[0011] Further preferably, the lower end of the telescopic rod assembly is connected to the transmission housing through a telescopic support bearing structure, which includes a telescopic support bearing and a telescopic support bearing seat. The telescopic support bearing seat is fixedly connected to the upper end of the transmission housing, the telescopic support bearing is arranged inside the telescopic support bearing seat, the outer side of the lower end of the screw rod is connected to the telescopic support bearing, and the lower end of the outer support cylinder is fixedly connected to the upper end of the telescopic support bearing seat.

[0012] Preferably, the lower end of the worm gear is rotatably connected to the transmission housing through a lower worm gear bearing, and the upper end is rotatably connected to the transmission housing through an upper worm gear bearing.

[0013] Preferably, a lower cover of the transmission housing is provided on the transmission housing at the lower end of each worm gear. A lower universal shaft is connected between the two lower covers of the transmission housing at the lower ends of each pair of worm gears, and an upper universal shaft is connected between the upper ends of each pair of telescopic rod assemblies.

[0014] Preferably, the drive motor in the drive motor assembly is connected to one end of the worm, and the other end of the worm is connected to an additional joint provided on the transmission housing. The additional joint is used to connect to a manual release tool or other drive device or braking device.

[0015] Preferably, the single worm and multiple worm gear transmission assembly includes one worm and a pair of worm gears.

[0016] Compared with the prior art, the advantages of the present invention are as follows:

[0017] The present invention provides a single-source multi-drive push rod with a two-way mechanical self-locking structure, which has the following advantages: First, a single worm drives multiple pairs of worm gears, mechanically controlling synchronous telescoping, with high motion accuracy, no need for electrical control, good synchronism, and not prone to failures; Second, the performance of the worm and the worm gear is output synchronously, avoiding performance redundancy of the worm; Third, the mechanical two-way self-locking structure improves product safety, no additional self-locking device is required, and the worm gear and worm drive as well as the screw drive can be non-self-locking, improving transmission efficiency; Fourth, the double telescopic rods are integrally integrated, reducing the volume and enhancing the load capacity; Fifth, single-source multi-drive realizes the functions of multiple push rods of the same kind. There are only upper and lower universal hinge points for the installation points, which is convenient for installation, has low requirements for the accuracy of the installation points, and at the same time, the two telescopic rod assemblies are evenly stressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of a certain angle of the single-source multi-drive push rod with a two-way mechanical self-locking structure provided by an embodiment of the present invention;

[0019] Figure 2 It is a three-dimensional schematic diagram of another angle of the single-source multi-drive push rod with a two-way mechanical self-locking structure provided by an embodiment of the present invention;

[0020] Figure 3 The front view of the single-source multi-drive push rod provided with a two-way mechanical self-locking structure according to an embodiment of the present invention;

[0021] Figure 4 is Figure 3 the view in the direction of A-A in

[0022] Figure 5 The top view of the single-source multi-drive push rod provided with a two-way mechanical self-locking structure according to an embodiment of the present invention;

[0023] Figure 6 is Figure 5 the view in the direction of B-B in

[0024] Figure 7 is Figure 6 the view in the direction of C-C in

[0025] Figure 8 The connection relationship diagram of the brake upper claw, the two-way brake holding spring, and the brake lower claw;

[0026] Figure 9 The exploded view of the connection relationship of the screw, the load nut, the brake upper claw, the two-way brake holding spring, the friction seat, the brake lower claw, and the worm gear. Detailed implementation manners

[0027] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] Referring to Figures 1 - 9 , this embodiment provides a single-source multi-drive push rod provided with a two-way mechanical self-locking structure, including a drive motor assembly, a single-worm multi-worm gear transmission assembly, a telescopic rod assembly, and a two-way mechanical self-locking structure. The single-worm multi-worm gear transmission assembly is placed in the transmission housing 3. The single-worm multi-worm gear transmission assembly includes a worm 1 and a pair of worm gears 2. The drive motor assembly is connected to one end of the worm 1. The two worm gears 2 of each pair of worm gears 2 are engaged on both sides of the worm 1. The upper end of each worm gear 2 is fixedly connected to a two-way mechanical self-locking structure, and the upper end of each two-way mechanical self-locking structure is fixedly connected to a telescopic rod assembly.

[0029] During the working process, the drive motor assembly drives the worm 1 to rotate, the worm 1 drives multiple pairs of worm gears 2 to rotate synchronously, each worm gear 2 drives the telescopic rod assembly to achieve telescoping through the connected two-way mechanical self-locking structure, and all the telescopic rod assemblies together drive the target device to lift and lower. When the target device is driven to a certain height, self-locking is achieved through each two-way mechanical self-locking mechanism to prevent the telescopic rod assembly from rotating under the action of the load gravity and damaging the device.

[0030] As a specific implementation of the bi-directional mechanical self-locking structure, each said bi-directional mechanical self-locking structure includes a lower brake claw 4, an upper brake claw 5, a bi-directional brake holding spring 6 and a friction seat 7. The lower brake claw 4 and the upper brake claw 5 have the same structure, and both include a connecting plate and a plurality of clamping claws integrally formed with and perpendicular to the connecting plate. The clamping claws of the lower brake claw 4 and the upper brake claw 5 are opposite and cross-set. The bi-directional brake holding spring 6 is sleeved outside the lower brake claw 4 and the upper brake claw 5. The lower end of the bi-directional brake holding spring 6 is provided with a downward bent lower elbow 601, and the upper end is provided with an upward bent upper elbow 602. The lower elbow 601 and the upper elbow 602 respectively extend between two adjacent clamping claws of the lower brake claw 4 and the upper brake claw 5 at corresponding positions. The friction seat 7 is sleeved outside the bi-directional brake holding spring 6 and is installed between the bi-directional brake holding spring 6 and the transmission housing 3; the upper end of each said worm gear 2 is fixedly connected to the connecting plate of the lower brake claw 4, and the connecting plate of the upper brake claw 5 is fixedly connected to the telescopic rod assembly.

[0031] When the motor drive assembly drives the telescopic rod assembly to perform a telescopic linear motion, since the worm gear 2 is fixedly connected to the lower brake claw 4, the worm gear 2 drives the lower brake claw 4 to rotate, so as to Figure 7 take the clockwise rotation direction as an example. If the rotation direction is clockwise, the lower brake claw 4 pushes the upper elbow 602 of the bi-directional brake holding spring 6 close to the upper brake claw 5. At this time, the bi-directional brake holding spring 6 has a tendency to contract inward, the outer wall of the bi-directional brake holding spring 6 moves away from the friction seat 7, the lower brake claw 4 pushes the upper brake claw 5 to rotate, and the upper brake claw 5 drives the telescopic rod assembly to rotate to realize lifting; if the rotation direction is counterclockwise, the lower brake claw 4 pushes the lower elbow 601 of the bi-directional brake holding spring 6 close to the upper brake claw 5. At this time, the bi-directional brake holding spring 6 also has a tendency to contract inward, the outer wall of the bi-directional brake holding spring 6 moves away from the friction seat 7, the lower brake claw 4 pushes the upper brake claw 5 to rotate, and the upper brake claw 5 drives the telescopic rod assembly to rotate to realize lifting;

[0032] When the motor drive assembly stops working and the load is driven to a certain height, the load gives a downward pressure to the telescopic rod assembly. This pressure has a driving force to drive the upper brake claw 5 to rotate. When this tendency is clockwise, the upper brake claw 5 pushes the lower elbow 601 of the bi-directional brake holding spring 6 close to the lower brake claw 4. At this time, the bi-directional brake holding spring 6 has a tendency to expand outward, the outer wall of the bi-directional brake holding spring 6 abuts against the friction seat 7, and the upper brake claw 5 will not drive the lower brake claw 4 to rotate, so it will not cause damage to the motor drive assembly; if the above tendency is counterclockwise, the upper brake claw 5 pushes the upper elbow 602 of the bi-directional brake holding spring 6 close to the lower brake claw 4. At this time, the bi-directional brake holding spring 6 also has a tendency to expand outward, the outer wall of the bi-directional brake holding spring 6 abuts against the friction seat 7, and the upper brake claw 5 will not drive the lower brake claw 4 to rotate. Similarly, it will not cause damage to the motor drive assembly.

[0033] As a specific implementation of the telescopic rod assembly, the telescopic rod assembly includes a screw rod 8, a load nut 9, a telescopic rod 10, a telescopic rod guide sleeve 11, and an outer support cylinder 12. The upper end of each of the bidirectional mechanical self-locking structures is fixedly connected to the lower end of a screw rod 8. The load nut 9 is in threaded fit with the screw rod 8. The thread directions of the two screw rods 8 above each pair of worm gears 2 are opposite. In order to cooperate with the two screw rods 8 with opposite threads, the thread directions of the two load nuts 9 on the two screw rods 8 are also opposite. The telescopic rod 10 is sleeved outside the screw rod 8, and the lower end is fixedly connected to the load nut 9. The telescopic rod guide sleeve 11 is sleeved outside the telescopic rod 10 and is in sliding fit with the telescopic rod 10. The load nut 9 and the telescopic rod 10 perform telescopic linear motion as the screw rod 8 rotates. The outer support cylinder 12 is sleeved outside the telescopic rod guide sleeve 11, the telescopic rod 10, and the load nut 9. The upper end of the telescopic rod 10 is fixedly connected to the upper end cover 13 of the telescopic rod. The outside of the upper end cover 13 of the telescopic rod is used to connect with the device to be driven.

[0034] When the motor drive assembly drives the telescopic rod assembly to perform telescopic linear motion, the screw rod 8 rotates, driving the load nut 9 and the telescopic rod 10 to expand and contract under the guidance of the telescopic rod guide sleeve 11. The upper end of the telescopic rod 10 drives the device to be driven to lift and lower through the upper end cover 13 of the telescopic rod.

[0035] In order to prevent the device to be driven from driving the load nut to fall and damage the device when the thread of the load nut 9 is damaged, as an improvement of the technical solution, a safety nut guide sleeve 14 is fixedly connected to the lower end of the load nut 9. A safety nut 15 is threadedly connected to the screw rod 8 inside the safety nut guide sleeve 14. The outside of the safety nut 15 is in sliding fit with the safety nut guide sleeve 14 to restrict the rotation of the safety nut 15. In order to cooperate with the two screw rods 8 with opposite threads, the thread directions of the safety nuts 15 on the two screw rods 8 above each pair of worm gears 2 are also opposite. A safety nut snap ring for preventing the safety nut 15 from coming out is integrally provided at the lower end of the safety nut guide sleeve 14. The distance between the safety nut snap ring and the lower end of the load nut 9 is greater than the height of the safety nut 15.

[0036] Under normal working conditions, the load nut 9 drives the safety nut guide sleeve 14 and the safety nut 15 to expand and contract together, and the safety nut 15 is not subjected to a force in the vertical direction. When the thread of the load nut 9 is damaged, the load nut 9 falls and presses on the safety nut 15 to form safety protection.

[0037] The upper end of the screw rod 8 is a free end. In order to prevent the load nut 9 from coming off the screw rod 8 during the working process, as an improvement of the technical solution, a load nut snap ring is provided at the upper end of the screw rod 8, and the outer diameter of the load nut snap ring is greater than the outer diameter of the screw rod 8.

[0038] To better connect the telescopic rod assembly with the transmission housing 3, as an improvement to the technical solution, the lower end of the telescopic rod assembly is connected to the transmission housing 3 through a telescopic support bearing structure. The telescopic support bearing structure includes a telescopic support bearing 16 and a telescopic support bearing seat 17. The telescopic support bearing seat 17 is fixedly connected to the upper end of the transmission housing 3. The telescopic support bearing 16 is arranged inside the telescopic support bearing seat 17. The outer side of the lower end of the screw rod 8 is connected to the telescopic support bearing 16. The lower end of the outer support cylinder 12 is fixedly connected to the upper end of the telescopic support bearing seat 17.

[0039] To better connect the worm gear 2 with the transmission housing 3, as an improvement to the technical solution, the lower end of the worm gear 2 is rotatably connected to the transmission housing 3 through a lower worm gear bearing 18, and the upper end is rotatably connected to the transmission housing 3 through an upper worm gear bearing 19.

[0040] To achieve consistency, synchronism, and universality in driving and connection, as an improvement to the technical solution, a lower end cover 20 of the transmission housing is provided on the transmission housing 3 at the lower end of each worm gear 2. The two lower end covers 20 of the transmission housing between the lower ends of each pair of worm gears 2 are connected by a lower universal shaft 21, and the upper ends of each pair of telescopic rod assemblies are connected by an upper universal shaft 22.

[0041] That is, this embodiment can be installed on equipment in various directions up and down. The upper end uses the upper universal shaft 22 as a unified driving point to achieve synchronous driving. The upper universal shaft 22 also serves as a structure to limit the rotation of the load nut 9 and the telescopic rod 10.

[0042] When the drive motor assembly fails, in order to be able to manually release the load or use other drive devices, as an improvement to the technical solution, the drive motor 24 in the drive motor assembly is connected to one end of the worm 1, and the other end of the worm 1 is connected to an additional joint 23 provided on the transmission housing 3. The additional joint 23 is used to connect to a manual release tool or other drive devices or braking devices.

[0043] In cases where necessary, the present invention can also drive two pairs of worm gears 2 through one worm 1.

[0044] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the knowledge scope of those of ordinary skill in the art, various changes can be made without departing from the gist of the present invention.

Claims

1. A single-source multi-drive push rod with a bidirectional mechanical self-locking structure, characterized in that: The invention comprises a driving motor assembly, a single-worm multi-worm gear transmission assembly, a telescopic rod assembly and a bidirectional mechanical self-locking structure, wherein the single-worm multi-worm gear transmission assembly is disposed in a transmission housing (3), the single-worm multi-worm gear transmission assembly comprises a worm (1) and a plurality of pairs of worm gears (2), the driving motor assembly is connected to one end of the worm (1), the two worm gears (2) of each pair of worm gears (2) are meshed on both sides of the worm (1), the upper end of each worm gear (2) is fixedly connected to a bidirectional mechanical self-locking structure, and the upper end of each bidirectional mechanical self-locking structure is fixedly connected to a telescopic rod assembly; Each of the bidirectional mechanical self-locking structures comprises a lower brake claw (4), an upper brake claw (5), a bidirectional brake spring (6) and a friction seat (7). The lower brake claw (4) and the upper brake claw (5) have the same structure, both comprising a connecting plate and a plurality of clamping claws which are integral with the connecting plate and vertically arranged. The clamping claws of the lower brake claw (4) and the upper brake claw (5) are arranged opposite to each other and crosswise. The bidirectional brake spring (6) is sleeved on the outer sides of the lower brake claw (4) and the upper brake claw (5). The lower end of the bidirectional brake spring (6) is provided with a lower elbow (60) bent inwardly. 1), an upper elbow (602) bent inwardly is provided at the upper end, the lower elbow (601) and the upper elbow (602) respectively extend between two adjacent clamping claws of the brake lower claw (4) and the brake upper claw (5) at corresponding positions, the friction seat (7) is sleeved on the outer side of the two-way brake spring (6), and is installed between the two-way brake spring (6) and the transmission housing (3); the upper end of each of the worm wheels (2) is fixedly connected to the connecting plate of the brake lower claw (4), and the connecting plate of the brake upper claw (5) is fixedly connected to the telescopic rod assembly.

2. The single-source multi-drive push rod with a bidirectional mechanical self-locking structure according to claim 1 is characterized in that: The telescopic rod assembly comprises a screw (8), a load nut (9), a telescopic rod (10), a telescopic rod guide sleeve (11) and an outer support tube (12). The upper end of each bidirectional mechanical self-locking structure is fixedly connected to the lower end of a screw (8). The load nut (9) is threadedly engaged with the screw (8). The threads of the two screws (8) above each pair of worm wheels (2) are in opposite directions. The telescopic rod (10) is sleeved on the outer side of the screw (8) and the lower end is fixedly connected to the load nut (9). The telescopic rod guide sleeve (11) is sleeved on the outer side of the telescopic rod (10) and is slidably engaged with the telescopic rod (10). The load nut (9) and the telescopic rod (10) perform telescopic linear motion as the screw (8) rotates. The outer support tube (12) is sleeved on the outer side of the telescopic rod guide sleeve (11), the telescopic rod (10) and the load nut (9). The upper end of the telescopic rod (10) is fixedly connected to the telescopic rod upper end cover (13). The outer side of the telescopic rod upper end cover (13) is used to connect to the device to be driven.

3. The single-source multi-drive push rod with a bidirectional mechanical self-locking structure according to claim 2 is characterized in that: A safety nut guide sleeve (14) is fixedly connected to the lower end of the load nut (9), and a safety nut (15) is threadedly connected to the screw rod (8) inside the safety nut guide sleeve (14). The outer side of the safety nut (15) is slidably matched with the safety nut guide sleeve (14) to limit the rotation of the safety nut (15). A safety nut retaining ring is integrally provided at the lower end of the safety nut guide sleeve (14) to prevent the safety nut (15) from falling out, and the distance between the safety nut retaining ring and the lower end of the load nut (9) is greater than the height of the safety nut (15).

4. The single-source multi-drive push rod with a bidirectional mechanical self-locking structure according to claim 2 is characterized in that: A load nut clamping ring is provided at the upper end of the screw rod (8), and the outer diameter of the load nut clamping ring is greater than the outer diameter of the screw rod (8).

5. The single-source multi-drive push rod with a bidirectional mechanical self-locking structure according to claim 2 is characterized in that: The lower end of the telescopic rod assembly is connected to the transmission housing (3) via a telescopic support bearing structure, wherein the telescopic support bearing structure comprises a telescopic support bearing (16) and a telescopic support bearing seat (17). The telescopic support bearing seat (17) is fixedly connected to the upper end of the transmission housing (3), the telescopic support bearing (16) is arranged on the inner side of the telescopic support bearing seat (17), the outer side of the lower end of the screw rod (8) is connected to the telescopic support bearing (16), and the lower end of the outer support cylinder (12) is fixedly connected to the upper end of the telescopic support bearing seat (17).

6. The single-source multi-drive push rod with a bidirectional mechanical self-locking structure according to claim 1, characterized in that: The lower end of the worm wheel (2) is rotationally connected to the transmission housing (3) via a worm wheel lower bearing (18), and the upper end is rotationally connected to the transmission housing (3) via a worm wheel upper bearing (19).

7. The single-source multi-drive push rod with a bidirectional mechanical self-locking structure according to claim 1, characterized in that: A transmission housing lower end cover (20) is provided on the transmission housing (3) at the lower end of each worm gear (2); the two transmission housing lower end covers (20) at the lower ends of each pair of worm gears (2) are connected via a lower universal shaft (21); and the upper ends of each pair of telescopic rod assemblies are connected via an upper universal shaft (22).

8. The single-source multi-drive push rod with a bidirectional mechanical self-locking structure according to claim 1, characterized in that: The drive motor (24) in the drive motor assembly is connected to one end of the worm (1), and the other end of the worm (1) is connected to an additional joint (23) provided on the transmission housing (3), and the additional joint (23) is used to connect to a manual release tool or other drive device or brake device.

9. The single-source multi-drive push rod with a bidirectional mechanical self-locking structure according to claim 1, characterized in that: The single-worm multi-worm gear transmission assembly comprises a worm (1) and a pair of worm gears (2).

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