Single-source multi-drive push rod with bidirectional mechanical self-locking structure

Abstract

The invention belongs to the technical field of telescopic linear motion equipment, and particularly relates to a single-source multi-drive push rod with a bidirectional mechanical self-locking structure, which comprises a driving motor assembly, a single-worm multi-worm-gear transmission assembly, a telescopic rod assembly and a bidirectional mechanical self-locking structure, the single-worm multi-worm-gear transmission assembly comprises a worm and a plurality of pairs of worm gears, the driving motor assembly is connected with one end of the worm, the two worm gears of each pair of worm gears are meshed on the two sides of the worm, the upper end of each worm gear is fixedly connected with one bidirectional mechanical self-locking structure, and the upper end of each bidirectional mechanical self-locking structure is fixedly connected with one telescopic rod assembly. The mechanical bidirectional self-locking function is achieved at the same time, the telescopic rod assembly is provided with a safety nut protection structure, the problem that part of parts of a traditional push rod are poor in transmission loading capacity is solved, and small-size, high-load, high-speed, accurate and safe driving is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of telescopic linear motion equipment, and in particular relates to a single-source multi-drive push rod provided with a bidirectional mechanical self-locking structure. Background Art

[0002] At present, most worm gear electric push rods have poor load capacity due to the meshing friction transmission of the worm gear transmission part. In order to achieve good meshing, the materials generally used for the worm gear are copper alloys and non-metals, and the worm is generally made of high-strength alloy steel. The contact strength and bending strength of the worm gear are much smaller than those of the worm. During the transmission process, the performance of the worm gear usually reaches its limit, while the performance of the worm has a large surplus. In order to save costs, the transmission of the telescopic part of the push rod usually uses a friction transmission screw, and often uses a non-metallic nut. Then the strength of the nut is much lower than that of the matching alloy lead screw. During use, the performance of the nut usually reaches its limit, while the lead screw has sufficient surplus performance. Therefore, if the overall parameters are to be improved, the performance of the worm gear transmission part and the lead screw transmission part must be improved at the same time.

[0003] At present, two electric push rods are used to drive simultaneously in some scenarios, but in this case, the two electric push rods need to be controlled to move simultaneously, otherwise there will be inconsistent forces. This requires that the driving source must move in a completely consistent manner, which usually requires a servo system and is extremely costly. The two push rods need two upper and lower mounting points each, and it is difficult to ensure that the distance between the upper and lower mounting points of the two push rods is completely consistent. When installing a single electric push rod, it is usually difficult to ensure the tolerance of the two mounting points. The poor tolerance of the upper and lower mounting points affects the service life of the push rod. At present, some push rods use universal joints, which will increase the installation length, but cannot solve the problem of the two push rods having completely consistent mounting points.

[0004] During the use of electric linear actuators, self-locking is usually required, or special industries require double self-locking to ensure safety performance. Generally, self-locking is achieved through worm gear self-locking, lead screw self-locking or electromagnetic brake braking. Self-locking of worm gear and lead screw will lead to extremely low transmission efficiency, and electromagnetic brake braking requires additional control circuits, which are 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 bidirectional mechanical self-locking structure.

[0006] The present invention is implemented in this way. It provides a single-source multi-drive push rod 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 a transmission housing. The single-worm multi-worm gear transmission assembly includes a worm and multiple pairs of worm wheels. The drive motor assembly is connected to one end of the worm, and the two worm wheels of each pair of worm wheels are meshed 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 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 integral with the connecting disk and vertically arranged. The clamping claws of the brake lower claw and the brake upper claw are arranged oppositely and crosswise. The two-way brake spring is sleeved on the outside of the brake lower claw and the brake upper claw. The lower end of the two-way brake spring is provided with a lower elbow bent inward, and the upper end is provided with an upper elbow bent inward. The lower elbow and the upper elbow are respectively extended between two adjacent clamping claws of the brake lower claw and the brake upper claw at corresponding positions. The friction seat is sleeved on the outside of the two-way brake spring and is installed between the two-way brake spring and the transmission housing; the upper end of each of the worm gears 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, a load nut, a telescopic rod, a telescopic rod guide sleeve and an outer support tube, the upper end of each of the two-way mechanical self-locking structures is fixedly connected to the lower end of a screw, the load nut is threadedly engaged on the screw, the threads of the two screws above each pair of worm gears are in opposite directions, the telescopic rod is sleeved on the outside of the screw, and the lower end is fixedly connected to the load nut, the telescopic rod guide sleeve is sleeved on the outside of the telescopic rod and slidingly engaged with the telescopic rod, the load nut and the telescopic rod perform telescopic linear motion as the screw rotates, the outer support tube is sleeved on the outside of the telescopic rod guide sleeve, the telescopic rod and the load nut, the upper end of the telescopic rod is fixedly connected to the upper end cover of the telescopic rod, and the outer side of the upper end cover of the telescopic rod is used to connect with the device to be driven.

[0009] It is further preferred that a safety nut guide sleeve is fixedly connected to the lower end of the load nut, and a safety nut is threadedly connected to the screw rod inside the safety nut guide sleeve. The outer side of the safety nut slides with the safety nut guide sleeve to limit the rotation of the safety nut. A safety nut retaining ring is integrally provided at the lower end of the safety nut guide sleeve to prevent the safety nut from falling out, and the distance between the safety nut retaining ring and the lower end of the load nut is greater than the height of the safety nut.

[0010] Further preferably, a load nut retaining ring is provided at the upper end of the screw rod, and the outer diameter of the load nut retaining ring is larger 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, the telescopic support bearing structure 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 on the inner side of the telescopic support bearing seat, the outer side of the lower end of the screw is connected to the telescopic support bearing, and the lower end of the outer support tube 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 via a worm gear lower bearing, and the upper end is rotatably connected to the transmission housing via a worm gear upper bearing.

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

[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 arranged on the transmission housing, and the additional joint is used to connect to a manual release tool or other drive device or braking device.

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

[0016] Compared with the prior art, the advantages of the present invention are: 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 is equipped with multiple pairs of worm gear drives, mechanically controlled synchronous extension and retraction, high movement accuracy, no need for electrical control, good synchronization, and not prone to failure; 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, does not require an additional self-locking device, the worm gear transmission and the lead screw transmission can be non-self-locking, and the transmission efficiency is improved; fourth, the double telescopic rods are integrated as a whole, the volume is reduced, and the load capacity is enhanced; fifth, single-source multi-drive, to achieve the same basic multiple push rod functions, the installation point has only upper and lower universal hinge points, easy to install, low precision requirements on the installation point, and the two telescopic rod assemblies are evenly stressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional schematic diagram of a single-source multi-drive push rod with a bidirectional mechanical self-locking structure provided by an embodiment of the present invention at one angle; Figure 2 A three-dimensional schematic diagram of another angle of a single-source multi-drive push rod with a bidirectional mechanical self-locking structure provided by an embodiment of the present invention; Figure 3A front view of a single-source multi-drive push rod with a bidirectional mechanical self-locking structure provided in an embodiment of the present invention; Figure 4 for Figure 3 Middle AA view; Figure 5 A top view of a single-source multi-drive push rod with a bidirectional mechanical self-locking structure provided in an embodiment of the present invention; Figure 6 for Figure 5 Middle BB view; Figure 7 for Figure 6 Middle CC view; Figure 8 This is a connection diagram of the brake upper claw, the two-way brake spring, and the brake lower claw; Fig. 9 It is an exploded diagram of the connection relationship between the screw, load nut, brake upper claw, bidirectional brake spring, friction seat, brake lower claw and worm gear. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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.

[0019] refer to Figure 1-Figure 9 The present embodiment provides a single-source multi-drive push rod with a bidirectional mechanical self-locking structure, including a drive motor assembly, a single-worm multi-worm gear transmission assembly, a telescopic rod assembly and a bidirectional mechanical self-locking structure. The single-worm multi-worm gear transmission assembly is placed in a transmission housing 3, and the single-worm multi-worm gear transmission assembly includes a worm 1 and a pair of worm wheels 2. The drive motor assembly is connected to one end of the worm 1, and the two worm wheels 2 of each pair of worm wheels 2 are meshed on both sides of the worm 1. The upper end of each worm wheel 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.

[0020] During the working process, the driving motor assembly drives the worm 1 to rotate, and the worm 1 drives multiple pairs of worm wheels 2 to rotate synchronously. Each worm wheel 2 drives the telescopic rod assembly to extend and retract through its own connected bidirectional mechanical self-locking structure. All the telescopic rod assemblies drive the target equipment to rise and fall together. When the target equipment is driven to a certain height, self-locking is achieved through each bidirectional mechanical self-locking mechanism to prevent the telescopic rod assembly from being driven to rotate under the action of the gravity of the load and damaging the equipment.

[0021] As a specific implementation method of the bidirectional mechanical self-locking structure, each of the bidirectional mechanical self-locking structures includes a brake lower claw 4, a brake upper claw 5, a bidirectional brake spring 6 and a friction seat 7. The brake lower claw 4 and the brake upper claw 5 have the same structure, both including a connecting disk and a plurality of clamping claws that are integral with the connecting disk and vertically arranged. The clamping claws of the brake lower claw 4 and the brake upper claw 5 are arranged oppositely and crosswise. The bidirectional brake spring 6 is sleeved on the outside of the brake lower claw 4 and the brake upper claw 5. The lower end of the bidirectional brake spring 6 is provided with a lower elbow 601 bent inwardly, and the upper end is provided with an upper elbow 602 bent inwardly. The lower elbow 601 and the upper elbow 602 are respectively extended between the two adjacent clamping claws of the brake lower claw 4 and the brake upper claw 5 at the corresponding positions. The friction seat 7 is sleeved on the outside of the bidirectional brake spring 6 and is installed between the bidirectional brake spring 6 and the transmission housing 3; the upper end of each of the worm gears 2 is fixedly connected to the connecting disk of the brake lower claw 4, and the connecting disk of the brake upper claw 5 is fixedly connected to the telescopic rod assembly.

[0022] When the motor drive assembly drives the telescopic rod assembly to perform telescopic linear motion, since the worm gear 2 is fixedly connected to the brake lower claw 4, the worm gear 2 drives the brake lower claw 4 to rotate, so that Figure 7 For example, if the rotation direction is clockwise, the brake lower claw 4 pushes the upper elbow 602 of the two-way brake spring 6 close to the brake upper claw 5. At this time, the two-way brake spring 6 has a tendency to tighten inward, and the outer side wall of the two-way brake spring 6 is away from the friction seat 7. The brake lower claw 4 pushes the brake upper claw 5 to rotate, and the brake upper claw 5 drives the telescopic rod assembly to rotate to achieve lifting; if the rotation direction is counterclockwise, the brake lower claw 4 pushes the lower elbow 601 of the two-way brake spring 6 close to the brake upper claw 5. At this time, the two-way brake spring 6 also has a tendency to tighten inward, and the outer side wall of the two-way brake spring 6 is away from the friction seat 7. The brake lower claw 4 pushes the brake upper claw 5 to rotate, and the brake upper claw 5 drives the telescopic rod assembly to rotate to achieve lifting; When the motor drive assembly stops working and drives the load to a certain height, the load applies downward pressure to the telescopic rod assembly, and this pressure drives the brake upper claw 5 to rotate. When this trend is clockwise, the brake upper claw 5 pushes the lower elbow 601 of the two-way brake spring 6 close to the brake lower claw 4. At this time, the two-way brake spring 6 has a tendency to expand outward, and the outer side wall of the two-way brake spring 6 is close to the friction seat 7. Therefore, the brake upper claw 5 will not drive the brake lower claw 4 to rotate, and thus will not cause damage to the motor drive assembly; if the above trend is counterclockwise, the brake upper claw 5 pushes the upper elbow 602 of the two-way brake spring 6 close to the brake lower claw 4. At this time, the two-way brake spring 6 also has a tendency to expand outward, and the outer side wall of the two-way brake spring 6 is close to the friction seat 7. Therefore, the brake upper claw 5 will not drive the brake lower claw 4 to rotate, and similarly will not cause damage to the motor drive assembly.

[0023] As a specific implementation method of the telescopic rod assembly, the telescopic rod assembly includes 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 of the two-way mechanical self-locking structures is fixedly connected to the lower end of a screw 8, and the load nut 9 is threadedly engaged on the screw 8. The two screws 8 above each pair of worm gears 2 have opposite thread directions. In order to match the two screws 8 with opposite threads, the two load nuts 9 on the two screws 8 have opposite thread directions. The telescopic rod 10 is sleeved on the outside 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 outside of the telescopic rod 10 and slides 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 outside 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, and the outer side of the telescopic rod upper end cover 13 is used to connect with the device to be driven.

[0024] When the motor drive assembly drives the telescopic rod assembly to perform telescopic linear motion, the screw 8 rotates, driving the load nut 9 and the telescopic rod 10 to telescope under the guidance of the telescopic rod guide sleeve 11, and the upper end of the telescopic rod 10 drives the driven device to rise and fall through the telescopic rod upper end cover 13.

[0025] In order to prevent the load nut 9 from falling and causing damage to the equipment 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, and a safety nut 15 is threadedly connected to the screw 8 inside the safety nut guide sleeve 14. The outer side of the safety nut 15 slides with the safety nut guide sleeve 14 to limit the rotation of the safety nut 15. In order to cooperate with the two screws 8 with opposite threads, the thread directions of the safety nuts 15 on the two screws 8 above each pair of the worm gear 2 are also opposite. The lower end of the safety nut guide sleeve 14 is integrally provided with a safety nut retaining ring 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.

[0026] 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 vertical force. When the thread of the load nut 9 is damaged, the load nut 9 falls and presses on the safety nut 15 to form a safety protection.

[0027] The upper end of the screw rod 8 is a free end. In order to prevent the load nut 9 from falling off the screw rod 8 during operation, as an improvement of the technical solution, a load nut retaining ring is provided at the upper end of the screw rod 8, and the outer diameter of the load nut retaining ring is larger than the outer diameter of the screw rod 8.

[0028] In order to better connect the telescopic rod assembly with the transmission housing 3, as an improvement of 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 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.

[0029] In order to better connect the worm wheel 2 with the transmission housing 3, as an improvement of the technical solution, the lower end of the worm wheel 2 is rotationally connected to the transmission housing 3 through a worm wheel lower bearing 18, and the upper end is rotationally connected to the transmission housing 3 through a worm wheel upper bearing 19.

[0030] In order to achieve consistency, synchronization and versatility of driving and connection, as an improvement of the technical solution, a transmission housing lower end cover 20 is provided on the transmission housing 3 at the lower end of each worm gear 2, and the two transmission housing lower end covers 20 at 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.

[0031] That is, the embodiment can be installed up and down on equipment in various directions, and the upper end is used as a unified driving point through the upper cardan shaft 22 to achieve synchronous driving. The upper cardan shaft 22 also serves as a structure to limit the rotation of the load nut 9 and the telescopic rod 10.

[0032] When the drive motor assembly fails, in order to be able to manually release the load or use other drive devices, as an improvement of 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 arranged on the transmission housing 3, and the additional joint 23 is used to connect to a manual release tool or other drive device or braking device.

[0033] If necessary, the present invention can also drive two pairs of worm wheels 2 through one worm 1 .

[0034] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose 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 and multiple-worm gear transmission assembly, a telescopic rod assembly and a bidirectional mechanical self-locking structure. The single-worm and multiple-worm gear transmission assembly is placed in a transmission housing (3). The single-worm and multiple-worm gear transmission assembly comprises a worm (1) and multiple 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. The upper end of each bidirectional mechanical self-locking structure is fixedly connected to a 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: 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.

3. 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.

4. The single-source multi-drive push rod with a bidirectional mechanical self-locking structure according to claim 3 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).

5. The single-source multi-drive push rod with a bidirectional mechanical self-locking structure according to claim 3 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).

6. The single-source multi-drive push rod with a bidirectional mechanical self-locking structure according to claim 3 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, the telescopic support bearing structure comprising a telescopic support bearing (16) and a telescopic support bearing seat (17), the telescopic support bearing seat (17) being fixedly connected to the upper end of the transmission housing (3), the telescopic support bearing (16) being arranged on the inner side of the telescopic support bearing seat (17), the outer side of the lower end of the screw rod (8) being connected to the telescopic support bearing (16), and the lower end of the outer support cylinder (12) being fixedly connected to the upper end of the telescopic support bearing seat (17).

7. 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).

8. 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).

9. 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.

10. 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).

Images