Supporting and unloading device for rigid frame bridge

Abstract

The utility model belongs to the technical field of bridge construction, and discloses a supporting and unloading device for a rigid frame bridge, which comprises a lower support, upper supports which are symmetrically arranged right above the lower support, a pair of vertical supports which are symmetrically arranged relative to a vertical plane are connected between the upper supports and the lower support in a sliding manner, and when the two vertical supports are close to each other, the upper supports and the lower supports are connected in a sliding manner. The distance between the upper support and the lower support is increased; the rotating shaft horizontally penetrates through the two vertical supports and is in sliding connection with the two vertical supports, and the two ends of the rotating shaft are sleeved with first gears in sliding clamping connection; in the assembling or disassembling process, the nuts on the two sides do not need to be screwed or unscrewed respectively, the second gears on the two sides can be controlled to be far away from or close to each other only by rotating the rotating shaft and controlling the rotating direction of the rotating shaft, the rotating shaft drives the first gear and the second gears in sequence, supporting or disassembling of the supporting and disassembling device is facilitated, and the disassembling and assembling work efficiency is improved.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of bridge construction, and particularly relates to a support and drop device for a rigid-frame bridge. Background Art

[0002] Currently, in the existing construction plan for the cast-in-place section of a bridge, steel wedges, sand barrels or drop blocks are generally used as temporary supports, aiming to form a support between the pier top and the cast-in-place formwork above.

[0003] For example, in the patent: A support drop block (Publication No.: CN206189273U), a support drop block is disclosed. The support drop block is composed of an upper support, a lower support, a left support and a right support. The lower isosceles surfaces of the left support and the right support are respectively in sliding fit with the left isosceles surface and the right isosceles surface of the lower support, and the upper isosceles surfaces of the left support and the right support are respectively in sliding fit with the left isosceles surface and the right isosceles surface of the upper support. During construction assembly, only by tightening the nuts can a stable effect be achieved, and when the formwork is dropped, only by loosening the nuts can the upper support fall.

[0004] However, when assembling or disassembling the support drop block in this patent during construction, the nuts at both ends need to be turned. It is not convenient for a single person to turn the nuts at both ends synchronously at one time, and the nuts at both ends need to be turned sequentially, which causes certain inconvenience during the assembly or disassembly process and the problem of low disassembly and assembly efficiency. Utility Model Content

[0005] Aiming at the deficiencies of the prior art, the purpose of the present disclosure is to provide a support and drop device for a rigid-frame bridge, which solves the problems of certain inconvenience and low disassembly and assembly efficiency in the assembly or disassembly process of the existing support and drop device.

[0006] The purpose of the present disclosure can be achieved by the following technical solutions:

[0007] A support and drop device for a rigid-frame bridge, comprising:

[0008] A lower support, with symmetrically placed upper supports directly above the lower support. A pair of vertical supports symmetrically placed with respect to the vertical plane are slidably connected between the upper support and the lower support. When the two vertical supports approach each other, the distance between the upper support and the lower support increases;

[0009] A rotating shaft, which horizontally passes through the two vertical supports and is slidably connected thereto. First gears that are slidably engaged are sleeved at both ends of the rotating shaft. The two first gears are respectively rotatably engaged on the sides of the two vertical supports away from each other, and the first gears can all move along the axis direction of the rotating shaft;

[0010] The screw rod is placed coaxially with the rotating shaft, and the thread spiral directions of the screw rod at both ends of the symmetrical plane of the two vertical supports are opposite. Circular through holes coaxial with the screw rod are provided on both vertical supports. The screw rod is placed in the circular through holes and is slidably connected thereto. Threadedly connected second gears are sleeved on both ends of the screw rod, and the second gears are meshed with the first gears at the corresponding ends respectively.

[0011] The principle and effect of the above technical solution are as follows:

[0012] In this application, the second gear is used to replace the nut in the prior art. During the support or disassembly process, it is not necessary to tighten or loosen the nuts on both sides respectively. Only by rotating the rotating shaft and controlling its rotation direction, the rotating shaft drives the first gear and the second gear in sequence, and the control of the mutual separation or approach of the second gears on both sides can be realized, which is convenient for the support or disassembly of the support and dropping device.

[0013] The lower support is in the shape of an isosceles trapezoid, and the cross-section at the lower end of the lower support is larger than that at the upper end. First inclined surfaces are provided on both sides of the lower support. The upper support is located directly above the lower support and is symmetrically placed therewith. Second inclined surfaces are provided on both sides of the upper support;

[0014] The two vertical supports correspond to the two first inclined surfaces one by one. The upper ends of the vertical supports are all in contact with the second inclined surfaces, and the lower ends of the vertical supports are all in contact with the first inclined surfaces;

[0015] A spring is fixed between the two vertical supports. The spring is sleeved on the rotating shaft and is always in a compressed state;

[0016] A card slot coaxial with the rotating shaft is provided on the peripheral wall of the rotating shaft. Protrusions adapted to the card slot are provided on the inner side walls of the first gears. The protrusions are slidably clamped with the card slot;

[0017] Two screw rods are provided and are symmetrically placed with respect to the rotating shaft. The circular through holes on any vertical support are correspondingly provided with two. The two screw rods are respectively placed in the two circular through holes. Threadedly connected second gears are sleeved on both ends of the two screw rods. The two second gears on one side of any vertical support are meshed with the first gear on that side, and the thread spiral directions of the two screw rods on the same side of the symmetrical plane of the two vertical supports are the same;

[0018] Connection blocks are fixed on the screw rods. The connection blocks are located between the two vertical supports. Telescopic rods are fixed at the lower ends of the connection blocks, and the lower ends of the telescopic rods are fixed to the lower support;

[0019] Limit rings are fixed on the side walls of the upper support and the lower support parallel to the axis direction of the screw rod. A pin rod is inserted between the two limit rings on the same side of the upper support and the lower support. A retaining disc is fixed at the upper end of the pin rod, and the retaining disc is located above the limit ring in the upper support;

[0020] A handle is fixedly sleeved on either end of the rotating shaft.

[0021] The explanations for the nouns, conjunctions or adjectives involved in the above technical solutions are as follows:

[0022] Connection: It refers to the process of connecting two separated profiles or parts into a complex part or component with fasteners such as screws, bolts and rivets.

[0023] Sliding connection: Two objects are in contact but not fixed, and they can slide relative to each other.

[0024] Advantages of the present disclosure:

[0025] 1. By using the second gear to replace the nut in the prior art, there is no need to tighten or loosen the nuts on both sides respectively during the assembly or disassembly process. Only by rotating the rotating shaft and controlling its rotation direction, the rotating shaft drives the first gear and the second gear in sequence, and the control of the mutual separation or approach of the second gears on both sides can be realized, which is convenient for the support or disassembly of the support and removal device, and improves the work efficiency of disassembly and installation;

[0026] 2. By sleeving a spring on the rotating shaft, when the support and removal device is disassembled, the second gears on both sides move away from each other, and under the elastic force of the spring, the vertical support is pushed to move synchronously with the second gear at the corresponding end;

[0027] 3. By providing the connecting block and the telescopic rod, the synchronous rotation of the screw rod is prevented during the rotation of the second gear, and the problem that the second gear cannot move along the axis direction of the screw rod is avoided. Description of the drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

[0029] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present disclosure;

[0030] Figure 2 It is a schematic diagram of a partial structure of the embodiment of the present disclosure;

[0031] Figure 3 It is a schematic diagram of a partial structure at the spring of the embodiment of the present disclosure;

[0032] Figure 4 It is a schematic diagram of a partial structure at the first gear of the embodiment of the present disclosure. Specific implementation manners

[0033] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present disclosure.

[0034] Herein, in conjunction with Figures 1 to 4 to describe an embodiment of a support and disassembly device for a rigid frame bridge. Specifically, the support and disassembly device for a rigid frame bridge is configured as a split structure, which has seven components such as a lower support 100, an upper support 200, a vertical support 300, a rotating shaft 400, a first gear 500, a screw 600, and a second gear 700. In this application, the second gear 700 is used to replace the nut in the prior art. During the support or disassembly process, it is not necessary to tighten or loosen the nuts on both sides separately. Only by rotating the rotating shaft 400 and controlling its rotation direction, the rotating shaft 400 drives the first gear 500 and the second gear 700 in sequence, and the control of the mutual separation or approach of the second gears 700 on both sides can be realized, which is convenient for the assembly or disassembly of the support and disassembly device and improves work efficiency.

[0035] Please refer to Figures 1 to 4 , a support and disassembly device for a rigid frame bridge, comprising:

[0036] A lower support 100, with symmetrically placed upper supports 200 directly above the lower support 100. A pair of vertical supports 300 symmetrically placed with respect to the vertical plane are slidably connected between the upper support 200 and the lower support 100. When the two vertical supports 300 approach each other, the distance between the upper support 200 and the lower support 100 increases;

[0037] A rotating shaft 400, which horizontally passes through the two vertical supports 300 and is slidably connected to them. Slidingly engaged first gears 500 are sleeved at both ends of the rotating shaft 400. The two first gears 500 are respectively rotationally engaged with one side surface of the two vertical supports 300 that are far away from each other, and the first gears 500 can all move along the axis direction of the rotating shaft 400;

[0038] A screw 600, which is coaxially placed with the rotating shaft 400, and the thread helix directions at both ends of the screw 600 located at both ends of the symmetry plane of the two vertical supports 300 are opposite. Circular through holes 301 coaxially placed with the screw 600 are opened on the vertical supports 300. The screw 600 is placed in the circular through holes 301 and is slidably connected to them. Threadedly connected second gears 700 are sleeved at both ends of the screw 600, and the second gears 700 are all engaged with the corresponding first gears 500;

[0039] The upper support 200 is used to be directly placed under the pouring mold during construction to ensure effective support during the pouring process of the beam body. The shape and size of the upper support 200 match the bottom surface of the beam body, and the upper support 200 can be made of materials such as steel.

[0040] The vertical support 300 has its upper and lower ends respectively abutted against the upper support 200 and the lower support 100. A rotating ring can be fixed on one side of the vertical support 300 close to the first gear 500, and a rotating groove can be opened on one side of the first gear 500 close to the vertical support 300. The rotating rings are inserted into the rotating grooves and are rotationally clamped with them.

[0041] The rotating shaft 400 is used for the stable support of the vertical support 300 and at the same time facilitates the sliding of the vertical support 300. The surface of the rotating shaft 400 should be made of a material with a relatively small coefficient of friction, and at the same time, the rotating shaft 400 should have sufficient hardness requirements to avoid bending of the rotating shaft 400 when the vertical support 300 slides. The preferred material for the rotating shaft 400 is aluminum alloy, which has a low density, high strength, and low price.

[0042] During use, rotate the rotating shaft 400. The rotating shaft 400 drives the first gear 500, and the first gear 500 drives the second gear 700. The second gear 700 rotates and moves along the axis direction of the screw rod 600. And the screw rod 600 is arranged with opposite spiral directions at both ends, which can make the two second gears 700 approach or move away from each other; when temporary support for assembly is required, drive the two second gears 700 to approach each other. The two second gears 700 push the two vertical supports 300 to approach each other along the rotating shaft 400, increasing the distance between the upper support 200 and the lower support 100 to achieve the temporary support of the rigid frame bridge; when the support needs to be disassembled, rotate the rotating shaft 400 in the reverse direction to make the two second gears 700 and the two vertical supports 300 move away from each other, reducing the distance between the upper support 200 and the lower support 100, which is convenient for the disassembly of the temporary support;

[0043] In this application, the second gear 700 is used to replace the nut in the prior art. During the support or disassembly process, it is not necessary to tighten or loosen the nuts on both sides respectively. Only need to rotate the rotating shaft 400 and control its rotation direction. The rotating shaft 400 drives the first gear 500 and the second gear 700 in sequence, and then the control of the mutual approach or separation of the two second gears 700 can be realized, which is convenient for the assembly or disassembly of the support and removal device.

[0044] The lower support 100 is in the shape of an isosceles trapezoid, and the cross-section at the lower end of the lower support 100 is larger than the upper end cross-section. First inclined surfaces 101 are provided on both sides of the lower support 100. The upper support 200 is located directly above the lower support 100 and is symmetrically placed with it. Second inclined surfaces are provided on both sides of the upper support 200;

[0045] The two vertical supports 300 correspond to the two first inclined surfaces 101 one by one. The upper ends of the vertical supports 300 are all in contact with the second inclined surface, and the lower ends of the vertical supports 300 are all in contact with the first inclined surface 101. When the two vertical supports 300 approach each other, the upper support 200 moves upward in the vertical direction. When the two second gears 700 move away from each other, the upper support 200 can move downward in the vertical direction.

[0046] When disassembling the support and unloading device, in order to keep the vertical support 300 moving synchronously with the second gear 700 at the corresponding end, a spring 800 is fixed between the two vertical supports 300. The spring 800 is sleeved on the rotating shaft 400, and the spring 800 is always in a compressed state. When the two second gears 700 on both sides move away from each other, the elastic force of the spring 800 pushes the vertical support 300 to move synchronously with the second gear 700 at the corresponding end.

[0047] To facilitate the sliding and clamping connection between the first gear 500 and the rotating shaft 400, a clamping groove 401 is provided on the peripheral wall of the rotating shaft 400 and is arranged coaxially with it. On the inner side wall of the first gear 500, a convex block adapted to the clamping groove 401 is provided, and the convex block is slidably clamped with the clamping groove 401. When the rotating shaft 400 rotates, the rotating shaft 400 can drive the first gear 500 to rotate through the cooperation of the clamping groove 401 and the convex block, and at the same time, it does not interfere with the movement of the first gear 500 along the axis direction of the rotating shaft 400.

[0048] To improve the stability of the support and unloading device during support, two screw rods 600 are provided symmetrically with respect to the rotating shaft 400. Two circular through holes 301 are correspondingly provided on each vertical support 300. The two screw rods 600 are respectively placed in the two circular through holes 301. Threaded second gears 700 are sleeved at both ends of the two screw rods 600. The two second gears 700 on one side of any vertical support 300 are meshed with the first gear 500 on this side, and the thread spiral directions of the two screw rods 600 on the same side of the symmetric plane of the two vertical supports 300 are the same. Through the setting of the two screw rods 600, in cooperation with the two second gears 700 at both ends of each screw rod 600, the stability during support is improved.

[0049] To prevent the second gear 700 from driving the screw rod 600 to rotate synchronously during rotation, which may cause the second gear 700 to be unable to move along the axis direction of the screw rod 600, connection blocks 9 are fixed on the screw rods 600. The connection blocks 9 are located between the two vertical supports 300. Telescopic rods 91 are fixed at the lower ends of the connection blocks 9, and the lower ends of the telescopic rods 91 are fixed to the lower support 100. Through the setting of the telescopic rods 91 and the connection blocks 9, the screw rod 600 is prevented from rotating synchronously with the second gear 700.

[0050] To prevent the upper support 200 and the lower support 100 from sliding horizontally in a direction perpendicular to the axis of the screw rod 600 during support, limiting rings 11 are fixed on the side walls of the upper support 200 and the lower support 100 parallel to the axis of the screw rod 600. A pin rod 12 is inserted between the two limiting rings 11 on the same side of the upper support 200 and the lower support 100. A retaining disc is fixed to the upper end of the pin rod 12, and the retaining disc is located above the limiting ring 11 in the upper support 200. The horizontal misalignment sliding between the upper support 200 and the lower support 100 is prevented by the pin rod 12.

[0051] A handle 10 is fixedly sleeved on either end of the rotating shaft 400.

[0052] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0053] The above shows and describes the basic principles, main features and advantages of the present disclosure. Those skilled in the art of this industry should understand that the present disclosure is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present disclosure. Without departing from the spirit and scope of the present disclosure, the present disclosure will have various changes and improvements, and these changes and improvements all fall within the scope of the present disclosure claimed.

Claims

1. A support unloading device for a rigid frame bridge, characterized in that: include: A lower support (100), an upper support (200) symmetrically placed is arranged directly above the lower support (100), a pair of vertical supports (300) symmetrically placed about a vertical plane are slidably connected between the upper support (200) and the lower support (100), and when the two vertical supports (300) are close to each other, the distance between the upper support (200) and the lower support (100) increases; A rotating shaft (400), the rotating shaft (400) horizontally passes through the two vertical supports (300) and is slidably connected thereto, both ends of the rotating shaft (400) are sleeved with first gears (500) that are slidably engaged, the two first gears (500) are respectively rotatably engaged with one side of the two vertical supports (300) that are away from each other, and the first gears (500) can move along the axis direction of the rotating shaft (400); The screw (600) is coaxially arranged with the rotating shaft (400), and the screw threads of the screw (600) at two ends of the symmetry plane of the two vertical supports (300) have opposite spiral directions. The vertical supports (300) are each provided with a circular through hole (301) coaxially arranged with the screw (600), the screw (600) is placed in the circular through hole (301) and is slidably connected thereto, and both ends of the screw (600) are sleeved with a second gear (700) threadedly connected thereto, and the second gear (700) is meshed with the first gear (500) at the corresponding end.

2. A support unloading device for a rigid frame bridge according to claim 1, characterized in that: The lower support (100) is in the shape of an isosceles terrace, and the lower end cross section of the lower support (100) is larger than the upper end cross section, first inclined surfaces (101) are provided on both sides of the lower support (100), the upper support (200) is located directly above the lower support (100) and is symmetrically placed therewith, and second inclined surfaces are provided on both sides of the upper support (200); The two vertical supports (300) correspond to the two first inclined surfaces (101) one by one, the upper ends of the vertical supports (300) are in contact with the second inclined surfaces, and the lower ends of the vertical supports (300) are in contact with the first inclined surfaces (101).

3. The support unloading device for a rigid frame bridge according to claim 2, characterized in that: A spring (800) is fixed between the two vertical supports (300). The spring (800) is sleeved on the rotating shaft (400). The spring (800) is always in a compressed state.

4. A support unloading device for a rigid frame bridge according to claim 3, characterized in that: A clamping groove (401) coaxially arranged therewith is provided on the peripheral wall of the rotating shaft (400), and a convex block matching the clamping groove (401) is provided on the inner side wall of the first gear (500), and the convex block is slidably clamped with the clamping groove (401).

5. The support unloading device for a rigid frame bridge according to claim 4, characterized in that: The screw rods (600) are arranged in two symmetrical positions with respect to the rotating shaft (400), and two round through holes (301) are arranged on any vertical support (300) accordingly. The two screw rods (600) are respectively placed in the two round through holes (301), and both ends of the two screw rods (600) are sleeved with second gears (700) connected by threads. The two second gears (700) on the side of any vertical support (300) are meshed with the first gear (500) on the side, and the screw threads of the two screw rods (600) on the same side of the symmetry plane of the two vertical supports (300) have the same spiral direction.

6. The support unloading device for a rigid frame bridge according to claim 5, characterized in that: A connecting block (9) is fixed on each screw rod (600), the connecting block (9) is located between the two vertical supports (300), a telescopic rod (91) is fixed at the lower end of each connecting block (9), and the lower end of each telescopic rod (91) is fixed to the lower support (100).

7. The support unloading device for a rigid frame bridge according to claim 6, characterized in that: Limiting rings (11) are fixed on the side walls of the upper support (200) and the lower support (100) parallel to the axial direction of the screw rod (600), a pin rod (12) is inserted between the two limiting rings (11) on the same side of the upper support (200) and the lower support (100), a baffle plate is fixed on the upper end of the pin rod (12), and the baffle plate is located above the limiting ring (11) in the upper support (200).

8. The support unloading device for a rigid frame bridge according to claim 7, characterized in that: A rotating handle (10) is fixedly sleeved on either end of the rotating shaft (400).

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