Adjustable bridge height limiting device

Abstract

The utility model relates to the field of height limiting equipment, and particularly discloses an adjustable bridge height limiting device. An adjustable bridge height limiting device comprises a base, stand columns fixedly connected to the upper surface of the base and a cross beam arranged at the ends of the two stand columns, lifting mechanisms used for lifting the cross beam are arranged in the stand columns, and each lifting mechanism comprises a circular rack, a first gear, a second gear, a third gear, a first rotating shaft, a second rotating shaft and a locking assembly. The first gear is meshed with the circular rack and fixedly connected with the first rotating shaft, the third gear is fixedly connected with the first rotating shaft and meshed with the second gear, the second gear is fixedly connected with the second rotating shaft, and the first rotating shaft and the second rotating shaft are rotationally connected to the inner wall of the stand column. The locking assembly is used for limiting rotation of the second rotating shaft, a rotating disc is fixedly connected to the end of the second rotating shaft, and a grip is fixedly connected to the surface of the rotating disc. The scheme has the advantage that the height limiting height is convenient to adjust.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of road safety facilities, in particular to an adjustable bridge height limiting device. BACKGROUND

[0002] With the acceleration of urbanization, bridges, as an important part of urban transportation, bear an increasingly important transportation function. At the same time, in order to ensure the safety of the bridge structure and the effective use of the maintenance facilities, it is particularly important to limit the height of the passing vehicles. Timely guiding or intercepting vehicles that exceed the specified height can effectively reduce the pressure on the bridge structure, prolong the service life of the bridge, and protect the safety of pedestrians and vehicles.

[0003] The height limiting device widely used at present has a fixed setting height and cannot flexibly adjust the height limiting height. In the face of unexpected situations, vehicles that need to pass through this section cannot pass through in time and need to take a detour, which will cause a waste of time. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the problem of fixed height of the height limiting device and the inability to flexibly adjust, the present application provides an adjustable bridge height limiting device.

[0005] The adjustable bridge height limiting device provided by the present application adopts the following technical scheme:

[0006] An adjustable bridge height limiting device, comprising a base, a stand column fixedly connected to the upper surface of the base, and a cross beam arranged at the end of the two stand columns, wherein the inside of the stand column is provided with a lifting mechanism for lifting the cross beam, the lifting mechanism comprises a round rack arranged at both ends of the cross beam, a first gear, a second gear, a third gear, a first rotating shaft, a second rotating shaft and a locking assembly, the first gear is engaged with the round rack, the first gear is fixedly connected with the first rotating shaft, the third gear is fixedly connected with the first rotating shaft, the third gear is engaged with the second gear, the second gear is fixedly connected with the second rotating shaft, the first rotating shaft and the second rotating shaft are rotatably connected to the inner wall of the stand column, the locking assembly is used to limit the rotation of the second rotating shaft, the end of the second rotating shaft is fixedly connected with a rotating disc for driving the second rotating shaft, and the surface of the rotating disc is fixedly connected with a handle.

[0007] By adopting the above technical scheme, when it is necessary to adjust the height of the cross beam, the rotating disc is rotated to drive the second rotating shaft, the second rotating shaft is rotated to drive the second gear to rotate, and then the third gear is rotated to drive the first rotating shaft to rotate, the first gear is rotated to drive the round rack to lift, and the round rack is lifted to drive the cross beam to lift.

[0008] Optionally, the locking assembly comprises a ratchet wheel, a pawl and a fixed shaft, the ratchet wheel is fixedly connected with the second rotating shaft, the pawl is engaged with the ratchet wheel, the pawl is rotationally connected with the fixed shaft, the fixed shaft is fixedly connected with the outer side of the stand, the upper surface of the pawl is connected with a spring, and the other end of the spring is fixedly connected with the stand.

[0009] By adopting the above technical scheme, the cooperation of the ratchet wheel and the pawl can realize the control of one-way rotation and limit reverse rotation, the spring can provide a downward force to make the pawl insert into the ratchet wheel teeth, and the reliability of the locking assembly is ensured. When the cross beam is lifted, the ratchet wheel rotates, the pawl inserts into the ratchet wheel teeth, and the reverse rotation of the ratchet wheel is prevented.

[0010] Optionally, a key is fixedly connected on one side of the pawl.

[0011] By adopting the above technical scheme, when it is needed to lower the cross beam, the key is pressed, the pawl is separated from the ratchet wheel teeth, the locking assembly is unlocked, the circular gear rack is lowered to drive the cross beam to be lowered, after the cross beam is lowered to the required height, the key is released, the pawl is reinserted into the ratchet wheel teeth by the spring, a self-locking state is formed between the ratchet wheel teeth and the pawl, and the continuous rotation of the ratchet wheel is prevented.

[0012] Optionally, the number of teeth of the third gear is three times that of the second gear.

[0013] By adopting the above technical scheme, the third gear is driven by the second gear to increase the output torque, and the cross beam can be lifted more easily.

[0014] Optionally, a limiting seat is fixedly connected with the inner wall of the stand, and the circular gear rack is slidingly connected with the limiting seat.

[0015] By adopting the above technical scheme, the circular gear rack is not easy to swing inside the stand due to the influence of the limiting seat, the circular gear rack always stably rises and falls, and the stability of the lifting mechanism is ensured.

[0016] Optionally, a reinforcing rib is connected between the limiting seat and the inner wall of the stand.

[0017] By adopting the above technical scheme, the connection strength between the limiting seat and the inner wall of the stand is increased.

[0018] Optionally, a connecting head is arranged at the end of the stand, connecting seats are arranged at the two ends of the cross beam, bolts are arranged through the connecting head and the connecting seat, and nuts are threadedly connected with the ends of the bolts.

[0019] By adopting the above technical scheme, the height limiting device can be conveniently disassembled, when it is needed to transfer the height limiting device, the nut is rotated, the bolt is taken out, the cross beam can be taken off from the end of the stand, and the height limiting device can be quickly transferred to other positions by moving the stand.

[0020] Optionally, the road reflective sticker is arranged on the surface of the column and the beam.

[0021] By adopting the above technical scheme, the road reflective sticker can reflect the light of the vehicle headlamp in the night or insufficient light condition, improve the visibility of the height limiting device, and reduce the possibility of accidents.

[0022] In summary, the present application has the following beneficial effects:

[0023] 1. The column is internally provided with a lifting mechanism, which is used to adjust the height of the beam to adapt to the height limiting requirements of different road sections, and has a wide application range.

[0024] 2. The road reflective sticker is arranged on the surface of the column and the beam, which can reflect the light of the vehicle headlamp in the insufficient light condition, so that the height limiting device is more eye-catching at night, helps the driver to more easily identify the road condition under low light conditions, and reduces the possibility of accidents.

[0025] 3. The beam and the column are connected through bolts and nuts, which is convenient for assembly and disassembly. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic view of the adjustable bridge height limiting device of the embodiment of the present application;

[0027] Figure 2 is a structural schematic view of the adjustable bridge height limiting device of the embodiment of the present application, which removes a side column shell;

[0028] Figure 3 is a side view structural view of the adjustable bridge height limiting device of the embodiment of the present application;

[0029] Figure 4 is Figure 2 is an enlarged view of structure at A in FIG. 1;

[0030] Figure 5 is a front view of the lifting mechanism of the embodiment of the present application.

[0031] BRIEF DESCRIPTION OF DRAWINGS 1. Base; 2. Column; 3. Beam; 4. Lifting mechanism; 41. Round rack; 42. First gear; 43. Second gear; 44. Third gear; 45. First rotating shaft; 46. Second rotating shaft; 47. Locking assembly; 471. Ratchet; 472. Pawl; 473. Fixed shaft; 474. Key; 475. Spring; 48. Turntable; 49. Handle; 5. Limiting seat; 6. Reinforcing rib; 7. Connecting head; 8. Connecting seat; 9. Bolt; 10. Nut; 11. Road reflective sticker. DETAILED DESCRIPTION

[0032] The following will be described in combination with the accompanying Figures 1-5Further details of the application are provided below.

[0033] The adjustable bridge height limiting device is disclosed in the embodiments of the present application. Referring to Figure 1 、 Figure 2 The bridge height limiting device comprises a base 1, a stand 2 fixedly connected to the upper surface of the base 1, and a crossbeam 3 arranged at the end of the stand 2. The stand 2 is a hollow structure, and an elevating mechanism 4 is arranged inside the stand 2. The elevating mechanism 4 can drive the crossbeam 3 to rise and fall, so as to adjust the height limiting height. The elevating mechanism 4 can drive the crossbeam 3 to fall to a height of 2 m from the ground, and can also drive the crossbeam 3 to rise to a height of 2.5 m from the ground, so as to adapt to different bridge height limiting requirements. In the embodiments of the present application, the maximum height of the crossbeam 3 is set to 2.5 m; in other embodiments, the maximum height of the crossbeam 3 can be customized to 3 m, 3.5 m or higher.

[0034] Referring to Figure 1 、 Figure 3 A connecting head 7 is arranged on the upper side of the stand 2, and the connecting head 7 is connected to the elevating mechanism 4. Connecting seats 8 are fixedly connected to the two ends of the crossbeam 3, and the connecting seats 8 have grooves for placing the connecting head 7. The connecting seats 8 and the connecting head 7 are jointly provided with a bolt 9, and the end of the bolt 9 is threadedly connected with a nut 10. After the connecting seats 8 are matched with the connecting head 7, the bolt 9 passes through the hole, and the nut 10 is tightened from the other side, so as to realize the fastening connection between the connecting head 7 and the connecting seat 8, and thus the crossbeam 3 is fixedly connected to the end of the stand 2. In the embodiments of the present application, one bolt 9 and one nut 10 are arranged; in other embodiments, the number of the bolts 9 and the nuts 10 can be increased according to requirements.

[0035] Referring to Figure 1 Road reflective stickers 11 are fixedly connected to the surfaces of the stand 2 and the crossbeam 3. In the case of insufficient light or at night, the visibility of the stand 2 and the crossbeam 3 can be increased, the driver can be helped to identify the road conditions, the accidents can be reduced, and the safety can be improved.

[0036] Referring to Figure 4 、 Figure 5The lifting mechanism 4 comprises a circular rack 41, a first gear 42, a second gear 43, a third gear 44, a first rotating shaft 45, a second rotating shaft 46 and a locking assembly 47. The circular rack 41 is vertically arranged and engaged with the first gear 42, and the upper end of the circular rack 41 is fixedly connected with the connecting head 7. The first gear 42 is fixedly connected with the first rotating shaft 45, and the third gear 44 is fixedly connected with the first rotating shaft 45. The second gear 43 is engaged with the third gear 44 and fixedly connected with the second rotating shaft 46. The first rotating shaft 45 and the second rotating shaft 46 are horizontally arranged in the inner wall of the stand 2 and rotationally connected with the stand 2. The locking assembly 47 is used for limiting the rotation of the second rotating shaft 46. The end of the second rotating shaft 46 is fixedly connected with a rotating disc 48, and the surface of the rotating disc 48 is eccentrically fixedly connected with a handle 49. When the height limiting height needs to be adjusted, the handle 49 is rotated, the second rotating shaft 46 is rotated, the second gear 43 is coaxially rotated with the second rotating shaft 46, the second gear 43 drives the third gear 44 to rotate, the third gear 44 drives the first rotating shaft 45 and the first gear 42 to rotate, the first gear 42 is engaged with the circular rack 41, the rotary motion of the first gear 42 is converted into the linear motion of the circular rack 41, the circular rack 41 is lifted, and when a certain height is reached, the handle 49 is loosened. At this time, the locking assembly 47 takes effect to prevent the second rotating shaft 46 from rotating in the reverse direction, and the height is fixed. In the embodiment of the application, the number of teeth of the third gear is three times the number of teeth of the second gear, which is more labor-saving in use. In other embodiments, the tooth number matching ratio can also be two times, four times or even higher according to actual conditions.

[0037] With reference to Figure 4 , Figure 5 The inner wall of the stand 2 is fixedly connected with a limiting seat 5, and the limiting seat 5 is slidingly connected with the circular rack 41. The circular rack 41 is not easy to swing on the inner side of the stand 2 under the influence of the limiting seat 5, can always stably vertically lift and ensures the stability of the operation of the lifting mechanism 4. The upper surface of the limiting seat 5 is fixedly connected with a reinforcing rib 6, and the reinforcing rib 6 is fixedly connected with the inner wall of the stand 2. The reinforcing rib 6 improves the connection strength of the limiting seat 5 and the inner wall of the stand 2.

[0038] With reference to Figure 3 , Figure 4 and Figure 5The locking assembly 47 comprises a ratchet wheel 471, a pawl 472 and a fixed shaft 473. The ratchet wheel 471 is fixedly connected with the second rotating shaft 46. The pawl 472 is engaged with the ratchet wheel 471. The pawl 472 is rotatably connected with the fixed shaft 473. The fixed shaft 473 is fixedly connected with the outer side of the stand 2 and located above the ratchet wheel 471. The key 474 is fixedly connected with the side of the pawl 472 away from the ratchet wheel 471. The spring 475 is connected with the upper surface of the pawl 472. The other end of the spring 475 is fixedly connected with the stand 2. When the locking assembly 47 is effective, the spring 475 provides a downward force to make the pawl 472 inserted into the teeth of the ratchet wheel 471, so as to prevent the ratchet wheel 471 from rotating reversely, thereby preventing the second rotating shaft 46 from rotating reversely. When it is needed to unlock the locking assembly 47, the key 474 is only needed to be pulled. At this time, the spring 475 is compressed, the pawl 472 is separated from the teeth of the ratchet wheel 471, the second rotating shaft 46 is not limited, and the second rotating shaft 46 can rotate reversely. At this time, the lifting mechanism 4 can drive the cross beam 3 to descend.

[0039] The implementation principle of the adjustable bridge height limiting device is as follows: when it is needed to increase the height limiting height, the handle 49 is rotated at this time, the second rotating shaft 46 is rotated to drive the second gear 43 to rotate, the second gear 43 drives the third gear 44 to rotate, the third gear 44 drives the first rotating shaft 45 to rotate, the first gear 42 is coaxially rotated with the first rotating shaft 45, the first gear 42 drives the circular rack 41 to rise, the cross beam 3 is lifted, and the cross beam 3 is released after being lifted to the required height limiting height. The locking assembly 47 is effective, and the height of the cross beam 3 is fixed. When it is needed to decrease the height limiting height, the key 474 is pulled, the locking assembly 47 is unlocked, and the height of the cross beam 3 can be decreased. The process is simple in operation, and the height limiting height of the height limiting device can be easily adjusted.

[0040] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An adjustable bridge height limiter, comprising a base (1), a stand (2) fixedly connected to the upper surface of the base (1), and a crossbeam (3) arranged at the end of the two stands (2), characterized in that: The column (2) is internally provided with a lifting mechanism (4) for lifting the cross beam (3), the lifting mechanism (4) comprises a round rack (41) arranged below both ends of the cross beam, a first gear (42), a second gear (43), a third gear (44), a first rotating shaft (45), a second rotating shaft (46) and a locking assembly (47), the first gear (42) is engaged with the round rack (41), the first gear (42) is fixedly connected with the first rotating shaft (45), the third gear (44) is fixedly connected with the first rotating shaft (45), the third gear (44) is engaged with the second gear (43), the second gear (43) is fixedly connected with the second rotating shaft (46), the first rotating shaft (45) and the second rotating shaft (46) are rotatably connected to the inner wall of the column (2), the locking assembly (47) is used for limiting the rotation of the second rotating shaft (46), the end of the second rotating shaft (46) is fixedly connected with a rotating disc (48) for driving the second rotating shaft (46), the surface of the rotating disc (48) is fixedly connected with a handle (49).

2. An adjustable bridge height limiter according to claim 1, wherein: The locking assembly (47) comprises a ratchet wheel (471), a pawl (472) and a fixed shaft (473), the ratchet wheel (471) is fixedly connected with the second rotating shaft (46), the pawl (472) is engaged with the ratchet wheel (471), the pawl (472) is rotatably connected with the fixed shaft (473), the fixed shaft (473) is fixedly connected to the outer side of the column (2), the upper surface of the pawl (472) is connected with a spring (475), the other end of the spring (475) is fixedly connected with the column (2).

3. An adjustable bridge height limiter according to claim 2, wherein: The pawl (472) is fixedly connected with a key (474) on one side.

4. An adjustable bridge height limiter according to claim 1, wherein: The number of teeth of the third gear (44) is three times that of the second gear (43).

5. An adjustable bridge height limiter according to claim 1, wherein: The inner wall of the column (2) is fixedly connected with a limiting seat (5), and the round rack (41) is slidably connected with the limiting seat (5).

6. An adjustable bridge height limiter according to claim 5, wherein: The limiting seat (5) and the inner wall of the column (2) are connected with a reinforcing rib (6).

7. An adjustable bridge height limiter according to claim 1, wherein: The end of the round rack (41) is fixedly connected with a connecting head (7), both ends of the cross beam (3) are provided with a connecting seat (8), the connecting head (7) and the connecting seat (8) are jointly provided with a bolt (9), and the end of the bolt (9) is threadedly connected with a nut (10).

8. An adjustable bridge height restriction device according to claim 1, wherein: The column (2) and the cross beam (3) are provided with road reflective stickers (11) on the surfaces.

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