Stretching mechanism of bridge side face detection stretching arm

Abstract

The utility model relates to the technical field of bridge detection, and discloses a stretching mechanism of a bridge side face detection stretching arm, which comprises a main frame, a motor I is fixedly connected in the main frame, a gear I is fixedly arranged at the output end of the motor I, and the tooth end of the gear I is meshed with a gear II. A first rotating shaft is fixedly connected to the interior of the second gear, the outer wall of the first rotating shaft is rotatably connected to the interior of the main frame, a limiting hole is formed in the second gear, the tooth ends of the first gear and the second gear are both connected with racks in a meshed mode, and a sliding rail is fixedly connected to the interior of the main frame. A first motor is started to drive a first gear at the output end to rotate, the first gear drives a second gear to rotate, the first gear and the second gear drive a rack to slide, a first fixing frame can stretch out, the second gear can be limited through an electric push rod and a plug pin, the length of the extended rack is adjusted, and the device can adapt to bridges of different sizes; and comprehensive detection of the bridge is ensured.

Description

Technical Field

[0001] This utility model relates to the field of bridge inspection technology, and in particular to an extension mechanism for a bridge side inspection extension arm. Background Technology

[0002] Bridge inspection is a crucial measure to ensure bridge safety, assess its performance, and extend its service life. It involves a wide range of activities and a rigorous process, and is conducted regularly by bridge maintenance personnel, often monthly. Using simple tools and visual observation, inspectors examine the bridge's exterior, quickly identifying obvious defects such as potholes, minor damage to railings, and debris buildup in expansion joints, providing fundamental information for subsequent maintenance.

[0003] Bridge side inspection is a crucial step in ensuring the structural safety and normal use of bridges. It involves checking the concrete sides for defects such as cracks, honeycombing, pitting, and spalling. The width, length, direction, and density of cracks are key indicators to observe. Minor cracks can be precisely measured using a crack observation instrument; severe honeycombing and pitting can weaken the structural load-bearing capacity, and their extent and severity must be marked.

[0004] By using a bridge side inspection arm, the sides of a bridge can be inspected. Bridges typically come in different sizes, but the length of the inspection arm is usually fixed, which may not be able to completely cover the entire bridge or perform comprehensive inspections on bridges of different sizes. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an extension mechanism for a bridge side inspection telescopic arm, which aims to improve the problem that the length of the usual inspection mechanism is fixed, which may not be able to completely cover the entire bridge and cannot perform comprehensive inspection of bridges of different sizes.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An extension mechanism for a bridge side-mounted telescopic arm includes a main frame. A motor is fixedly connected inside the main frame. A gear is fixedly mounted on the output end of the motor. The teeth of the gear are meshed with a gear. A rotating shaft is fixedly connected inside the gear. The outer wall of the rotating shaft is rotatably connected inside the main frame. A limiting hole is formed inside the gear. Both gears are meshed with racks. A slide rail is fixedly connected inside the main frame. The outer wall of the rack is slidably connected inside the slide rail. A fixing frame is fixedly connected to the outer wall of the rack. An electric push rod is fixedly connected inside the main frame. A pin is fixedly connected to the output end of the electric push rod. The outer wall of the pin is slidably connected inside the limiting hole. A lifting assembly is provided on the outer wall of the fixing frame for lifting the outer shell.

[0008] Preferably, the lifting assembly includes a lifting cylinder, the upper surface of which is fixedly connected to the lower surface of the fixing frame, and a lifting rod is slidably connected inside the lifting cylinder.

[0009] Preferably, the lower surface of the lifting rod is fixedly connected to a housing.

[0010] Preferably, the housing is internally fixedly connected to a motor and a mounting bracket.

[0011] Preferably, a worm is fixedly provided at the output end of the second motor, and the tooth ends of the worm are meshed with worm wheel one and worm wheel two.

[0012] Preferably, both the first and second worm gears are fixedly connected to a second rotating shaft, and the outer wall of the second rotating shaft is rotatably connected to the outer wall of the second fixed frame.

[0013] Preferably, both the first and second worm gears are fixedly connected to a sliding rod inside, and the outer wall of the sliding rod is slidably connected to the inside of the second fixing frame.

[0014] Preferably, the outer wall of the slide rod is slidably connected to a slide frame, the slide frame has a slide groove inside, the outer wall of the slide rod is slidably connected to the inside of the slide groove, and the outer wall of the slide frame is slidably connected to the outer wall of the second fixed frame.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, starting motor one drives gear one at the output end to rotate, gear one drives gear two to rotate, gear one and gear two drive the rack to slide, which can extend the fixed frame one. The electric push rod and pin can restrict gear two, thereby adjusting the length of the extended rack. This can be adapted to bridges of different sizes to ensure comprehensive bridge inspection.

[0017] 2. In this utility model, the second motor drives the second fixed frame to rotate, and the second fixed frame simultaneously drives the worm and the first worm wheel to rotate. The worm and the first worm wheel simultaneously drive the slide rod to slide, and the slide rod pushes the sliding frame to slide. The sliding frame can fix detectors such as cameras. The second motor drives the worm to rotate in the opposite direction, so that the detector can be removed, thus facilitating the use of different detectors for different aspects of testing. Attached Figure Description

[0018] Figure 1 This is a perspective view of the extension mechanism for a bridge side detection extension arm proposed in this utility model;

[0019] Figure 2 This is a cross-sectional schematic diagram of the internal structure of the main frame of the extension mechanism for a bridge side detection extension arm proposed in this utility model.

[0020] Figure 3 This is a cross-sectional schematic diagram of the internal structure of the outer shell of the extension mechanism for a bridge side detection extension arm proposed in this utility model.

[0021] Figure 4 This is a partial structural diagram of the sliding frame of the extension mechanism for a bridge side detection extension arm proposed in this utility model.

[0022] Legend:

[0023] 1. Main frame; 2. Motor 1; 3. Gear 1; 4. Gear 2; 5. Shaft 1; 6. Rack; 7. Slide rail; 8. Limiting hole; 9. Electric push rod; 10. Pin; 11. Fixing frame 1; 12. Lifting cylinder; 13. Lifting rod; 14. Outer shell; 15. Motor 2; 16. Fixing frame 2; 17. Worm gear; 18. Worm wheel 1; 19. Worm wheel 2; 20. Shaft 2; 21. Slide rod; 22. Sliding frame; 23. Slide groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figure 1 and Figure 2 This utility model provides an embodiment of a bridge side detection extension arm extension mechanism, comprising a main frame 1, a motor 2 fixedly connected inside the main frame 1, a gear 3 fixedly mounted at the output end of the motor 2, a gear 4 meshing with the tooth end of the gear 3, a rotating shaft 5 fixedly connected inside the gear 4, the outer wall of the rotating shaft 5 rotatably connected inside the main frame 1, a limiting hole 8 opened inside the gear 4, a rack 6 meshing with the tooth ends of both the gear 3 and the gear 4, a slide rail 7 fixedly connected inside the main frame 1, the outer wall of the rack 6 slidably connected inside the slide rail 7, a fixing frame 11 fixedly connected to the outer wall of the rack 6, an electric push rod 9 fixedly connected inside the main frame 1, a pin 10 fixedly connected at the output end of the electric push rod 9, the outer wall of the pin 10 slidably connected inside the limiting hole 8, and a lifting assembly provided on the outer wall of the fixing frame 11 for lifting the outer shell 14.

[0026] Specifically, the main frame 1 fixes the motor 2, which drives the gear 3 to rotate. The gear 3 meshes with the gear 4 and rotates. The shaft 5 supports the rotation of the gear 4. The gears 3 and 4 rotate in opposite directions. The gears 3 and 4 simultaneously drive the racks 6 on both sides to slide. The racks 6 on both sides slide in the same opposite direction, which can adjust the extension length of the racks 6. When the electric push rod 9 is activated, the pin 10 is inserted into the limiting hole 8, and the gear 4 cannot rotate, thus preventing the racks 6 from loosening.

[0027] Reference Figure 1 The lifting assembly includes a lifting cylinder 12, the upper surface of which is fixedly connected to the lower surface of the fixed frame 11, and a lifting rod 13 is slidably connected inside the lifting cylinder 12.

[0028] Specifically, the lifting boom 13 can be raised and lowered using existing technology, and the lifting boom 13 can be raised and lowered on the side of the bridge.

[0029] Reference Figure 3 A housing 14 is fixedly connected to the lower surface of the lifting rod 13; a motor 15 and a fixing frame 16 are fixedly connected inside the housing 14; a worm 17 is fixedly installed at the output end of the motor 15, and a worm wheel 18 and a worm wheel 19 are meshed at the tooth end of the worm 17; a rotating shaft 20 is fixedly connected inside both the worm wheel 18 and the worm wheel 19, and the outer wall of the rotating shaft 20 is rotatably connected to the outer wall of the fixing frame 16.

[0030] Specifically, the outer casing 14 fixes the second motor 15, the second motor 15 drives the worm 17 to rotate, the worm 17 simultaneously drives the first worm wheel 18 and the second worm wheel 19 to rotate, the second rotating shaft 20 supports the rotation of the first worm wheel 18 and the second worm wheel 19, and the first worm wheel 18 and the second worm wheel 19 rotate in opposite directions.

[0031] Reference Figure 3 and Figure 4 Both worm gear 18 and worm gear 29 are fixedly connected to a slide rod 21. The outer wall of the slide rod 21 is slidably connected to the inside of the fixed frame 2 16. The outer wall of the slide rod 21 is slidably connected to a slide frame 22. The slide frame 22 has a slide groove 23 inside. The outer wall of the slide rod 21 is slidably connected to the inside of the slide groove 23. The outer wall of the slide frame 22 is slidably connected to the outer wall of the fixed frame 2 16.

[0032] Specifically, worm gear 18 and worm gear 29 drive slide rod 21 to rotate. Slide rod 21 slides inside fixed frame 26 and slides inside slide groove 23. When slide rod 21 slides, it pushes slide frame 22 to slide. Fixed frame 26 supports slide frame 22 to slide.

[0033] Working principle: When using this mechanism, motor 2 first drives gear 3 to rotate, which in turn drives gear 4 to rotate. Simultaneously, shaft 5 rotates inside the main frame 1. Gears 3 and 4 simultaneously drive rack 6 to slide inside slide rail 7, extending rack 6 out of the main frame 1. Electric push rod 9 then inserts pin 10 into limiting hole 8, restricting gear 4 and controlling the extension length of rack 6. Subsequently, lifting assembly raises and lowers housing 14, adjusting its height to align it with the area to be inspected. Various detection methods are then employed. When the detector needs to be replaced, the motor 15 can be started to drive the worm gear 17 to rotate. The worm gear 17 simultaneously drives the worm wheel 18 and the worm wheel 19 to rotate. The worm wheel 18 and the worm wheel 19 simultaneously drive the slide rod 21 to slide inside the fixed frame 16. The slide rod 21 slides inside the slide groove 23 and pushes the slide frame 22 to slide. The slide frames 22 on both sides slide in opposite directions, which can fix or remove the detector. This mechanism can not only adjust the extension length of the fixed frame 11 to adapt to bridges of different sizes, but also facilitate the replacement of different detectors and the performance of different testing methods.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bridge side detection boom stretching mechanism comprising a main frame (1), characterized in that: The inside of the main frame (1) is fixedly connected with a motor one (2), the output end of the motor one (2) is fixedly provided with a gear one (3), the tooth end of the gear one (3) is engagedly connected with a gear two (4), the inside of the gear two (4) is fixedly connected with a rotating shaft one (5), the outer wall of the rotating shaft one (5) is rotatably connected in the inside of the main frame (1), the inside of the gear two (4) is provided with a limiting hole (8), the tooth end of the gear one (3) and the gear two (4) is engagedly connected with a rack (6), the inside of the main frame (1) is fixedly connected with a slide rail (7), the outer wall of the rack (6) is slidably connected in the inside of the slide rail (7), the outer wall of the rack (6) is fixedly connected with a fixed frame one (11), the inside of the main frame (1) is fixedly connected with an electric push rod (9), the output end of the electric push rod (9) is fixedly connected with a bolt (10), the outer wall of the bolt (10) is slidably connected in the inside of the limiting hole (8), the outer wall of the fixed frame one (11) is provided with a lifting assembly, and the lifting assembly is used to lift an outer shell (14).

2. The extension mechanism of a bridge side detection extension arm according to claim 1, characterized in that: The lifting assembly comprises a lifting cylinder (12), and the upper surface of the lifting cylinder (12) is fixedly connected to the lower surface of the fixed frame one (11).

3. A bridge side detection stretching arm stretching mechanism according to claim 2, characterized in that: The lower surface of the lifting rod (13) is fixedly connected with an outer shell (14).

4. The extension mechanism of a bridge side detection extension arm according to claim 3, characterized in that: The inside of the outer shell (14) is fixedly connected with a motor two (15) and a fixed frame two (16).

5. A bridge side detection stretching arm stretching mechanism according to claim 4, characterized in that: The output end of the motor two (15) is fixedly provided with a worm (17), and the tooth end of the worm (17) is engagedly connected with a worm wheel one (18) and a worm wheel two (19).

6. A bridge side detection stretching arm stretching mechanism according to claim 5, characterized in that: The inside of the worm wheel one (18) and the worm wheel two (19) is fixedly connected with a rotating shaft two (20), and the outer wall of the rotating shaft two (20) is rotatably connected to the outer wall of the fixed frame two (16).

7. A bridge side detection stretching arm stretching mechanism according to claim 6, characterized in that: The inside of the worm wheel one (18) and the worm wheel two (19) is fixedly connected with a slide rod (21), and the outer wall of the slide rod (21) is slidably connected in the inside of the fixed frame two (16).

8. A bridge side detection stretching arm stretching mechanism according to claim 7, characterized in that: The outer wall of the slide rod (21) is slidably connected with a sliding frame (22), the inside of the sliding frame (22) is provided with a sliding groove (23), the outer wall of the slide rod (21) is slidably connected in the inside of the sliding groove (23), and the outer wall of the sliding frame (22) is slidably connected to the outer wall of the fixed frame two (16).

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