A synchronous support device

Abstract

The utility model discloses a kind of synchronous support devices, it is related to building construction equipment technical field, to solve the problems of insufficient stability of existing support device, limited use scene, left and right support different step and inaccurate adjustment. The device includes support top plate, synchronous lifting mechanism and base;Synchronous lifting mechanism bottom is fixed on the base, and support top plate bottom is fixed on the synchronous lifting mechanism output end;Synchronous lifting mechanism includes symmetrically arranged first, second lifting assembly, and transmission shaft, speed reduction force increasing mechanism and hand-operated device;Transmission shaft is connected with hand-operated device by speed reduction force increasing mechanism, and drives two lifting assemblies synchronous action. The utility model promotes support stability and adaptability by double support assembly synchronous action, realizes the accurate adjustment of supporting strength, without relying on external energy, applicable to a variety of construction scenes.

Description

Technical Field

[0001] This utility model relates to the field of building construction equipment technology, and specifically to a synchronous support device for concrete support in building construction. Background Technology

[0002] During the construction process, after the concrete structure is poured, it needs to be supported to ensure that the concrete maintains its intended shape during the solidification process and to avoid deformation or collapse due to its own weight or external loads.

[0003] Currently, the concrete support devices commonly used in building construction are mainly divided into two categories:

[0004] One type is the simple wooden support, which is usually made of square timber and wooden planks. It has a simple structure and low cost, but it has significant drawbacks: the load-bearing capacity of wood is limited, and it is prone to bending and cracking under long-term stress, resulting in insufficient support stability; moreover, the height and support strength of the support are difficult to adjust, and it cannot adapt to the support needs of concrete of different thicknesses and heights. When pouring tall or thick concrete structures, it is easy to cause the risk of collapse due to insufficient support strength.

[0005] Another type is the multi-power hydraulic or electric motor driven support device. This type of device is powered by hydraulic cylinders or electric motors and has a large supporting force, but it still has many problems:

[0006] First, the application scenarios are limited. Hydraulic drive requires a hydraulic pump station, and electric drive requires an external power source. In field construction scenarios or temporary emergency repair sites where there is no power or hydraulic source, such devices are difficult to use normally.

[0007] Secondly, the left and right support forces are prone to unevenness. For example, Chinese patent CN2020200900311 discloses a building engineering support device, including a first base, multiple sets of structural frames, and multiple sets of bolts. The first base is placed on the working surface, and the multiple sets of structural frames are connected to each other by multiple sets of bolts, with each set of structural frames installed on the top of the first base. It also includes a hydraulic pump, a first hydraulic shaft, a second hydraulic shaft, a third hydraulic shaft, and a fourth hydraulic shaft. The bottom end of the hydraulic pump is fixedly connected to the top of the first base, and the bottom ends of the first, second, third, and fourth hydraulic shafts extend through the top of the first base into the interior of the first base and are connected to the hydraulic device inside the first base. Because multiple power sources are used to drive the support structures on both sides separately, if there is a difference in the power output on both sides (such as hydraulic pressure fluctuations), it will cause the left and right support heights to be asynchronous, resulting in an imbalance of support forces, which in turn will cause the support structure to tilt, and in severe cases, lead to a collapse accident.

[0008] Third, the support force adjustment precision is low. Hydraulic drive adjusts the support height by controlling the hydraulic oil volume, and motor drive adjusts it by controlling the speed. Neither of them can achieve micro-adjustment, and they cannot accurately match the support force and height required for concrete support. They are prone to affecting the support effect due to over-adjustment or under-adjustment.

[0009] Therefore, developing a concrete support device with high stability, wide application scenarios, synchronous left and right support, and precise adjustment has become a key requirement to solve the pain points of existing technologies. Utility Model Content

[0010] The purpose of this utility model is to overcome the shortcomings of existing concrete support devices in building construction, such as insufficient stability, limited application scenarios, uneven left and right support forces, and inaccurate adjustment. It provides a synchronous support device that improves support stability and adaptability through the synchronous operation of dual support components, while ensuring precise adjustment of support force.

[0011] To achieve the above objectives, the technical solution of this utility model is as follows:

[0012] A synchronous support device includes a support top plate, a synchronous lifting mechanism, and a base; the bottom of the synchronous lifting mechanism is fixedly disposed on the upper surface of the base, and the bottom of the support top plate is fixedly disposed on the output end of the synchronous lifting mechanism.

[0013] The supporting synchronous top plate includes a placement plate and a U-shaped top plate;

[0014] The bottom of the placement plate is fixed to the output end of the synchronous lifting mechanism, and the U-shaped top plate is fixed to the top of the placement plate;

[0015] The synchronous lifting mechanism includes a first lifting component and a second lifting component symmetrically arranged on the base in the vertical direction, as well as a transmission shaft, a speed reduction and force amplification mechanism and a hand crank for driving the two lifting components to move synchronously.

[0016] The output ends of the first and second lifting components are fixedly connected to the bottom of the placement plate; the input end of the transmission shaft is connected to the hand crank device through a speed reduction and force amplification mechanism, and the output end of the transmission shaft is connected to the input ends of the first and second lifting components.

[0017] The above technical solution offers the following advantages: Compared to existing technologies, by adopting a combination of a placement plate and a U-shaped top plate for the support top plate, it ensures stable support of the synchronous lifting mechanism's output force. The U-shaped structure also ensures adaptability to different specifications of concrete support scenarios, guaranteeing the stability of the support contact. The synchronous lifting mechanism, with a single drive shaft as its core and symmetrically arranged first and second lifting components, ensures completely synchronized lifting movements on both sides from a transmission structure perspective. This effectively avoids the left-right height imbalance and support tilting problems that are common in traditional multi-power source support devices. Furthermore, the combination of a hand-cranked device and a deceleration and force-increasing mechanism eliminates the need for external power or hydraulic sources, allowing for flexible adaptation to energy-deficient scenarios such as field construction and temporary repairs. It also reduces operational effort and improves ease of use, ultimately achieving the technical goals of "synchronous and stable support, wide scenario adaptability, and convenient and efficient operation" in concrete support processes.

[0018] As a further improvement to the above technical solution, the first lifting assembly includes a lifting cylinder, a lifting sleeve, a threaded lifting rod, and a support block;

[0019] The bottom of the lifting sleeve is fixed to the upper surface of the base, and the drive shaft passes through the bottom side wall of the lifting sleeve. The drive shaft is rotatable relative to the lifting sleeve.

[0020] The lifting cylinder is slidably disposed within the lifting sleeve, the top of the lifting cylinder is fixedly disposed at the bottom of the placement plate, the support block is fixedly disposed within the lifting sleeve, and the support block is disposed between the bottom of the lifting cylinder and the drive shaft; the bottom end of the threaded lifting rod passes vertically through the support block, the threaded lifting rod is located at the central axis of the support block, the threaded lifting rod is rotatable relative to the support block, the bottom end of the threaded lifting rod is connected to the drive shaft, and the top end of the threaded lifting rod is threadedly connected to the bottom end of the lifting cylinder;

[0021] The second lifting component is configured in the same way as the first lifting component.

[0022] The above technical solution offers the following advantages: By using the lifting sleeve as a fixed base to secure the base, stable support is provided for the overall lifting structure. A rotatable drive shaft, penetrating its sidewall, efficiently transmits driving force. The support block is precisely positioned within the lifting sleeve, providing stable rotational support for the threaded lifting rod and limiting the relative position of the lifting cylinder and drive shaft, ensuring a stable transmission path. The threaded lifting rod, through its central shaft penetrating the support block and its threaded connection to the bottom of the lifting cylinder, precisely converts the rotational motion of the drive shaft into the vertical lifting motion of the lifting cylinder, achieving controllable adjustment of the support height. Furthermore, the threaded transmission characteristics ensure stable lifting accuracy and support force. Simultaneously, the structure of the lifting cylinder sliding within the lifting sleeve further constrains the lifting direction, preventing deviation. The identical structures of the lifting components on both sides, driven synchronously by the drive shaft, ensure complete synchronization of the left and right support lifting from both component structure and transmission logic perspectives. This effectively avoids the support imbalance problem caused by differences in components or uneven power on both sides in traditional support devices, significantly improving support stability and height adjustment accuracy during concrete support.

[0023] As a further improvement to the above technical solution, a first bevel gear is fixed at the bottom end of the threaded lifting rod, and a second bevel gear adapted to the first bevel gear is provided on the transmission shaft, wherein the first bevel gear and the second bevel gear mesh.

[0024] The above technical solution has the following advantages: The meshing of the first and second bevel gears efficiently converts the horizontal rotation of the drive shaft into the vertical rotation of the threaded lifting rod, ensuring a precise and smooth power transmission path. Simultaneously, the gear meshing transmission features a stable transmission ratio and high efficiency, guaranteeing that the driving torque of the drive shaft is transmitted evenly and reliably to the threaded lifting rod, avoiding power loss or transmission lag. The symmetrically arranged bevel gear sets in the two lifting components work synchronously, ensuring that the first and second lifting components receive completely consistent driving force and rotational speed. This further guarantees strict synchronization of the lifting actions on both sides from the transmission stage, effectively preventing inconsistent support heights caused by differences in power transmission, and enhancing the overall support stability and synchronization accuracy of the device.

[0025] As a further improvement to the above technical solution, the lifting cylinder is provided with a threaded cavity, which is located near the central axis of the lifting cylinder. The internal thread of the threaded cavity is adapted to the external thread of the threaded lifting rod, and the threaded lifting rod is threadedly connected to the threaded cavity.

[0026] The above technical solution offers several advantages: Firstly, the precise fit between the central threaded cavity and the threaded lifting rod ensures that the vertical rotation of the threaded lifting rod is stably converted into the vertical linear lifting motion of the lifting cylinder, preventing deviation or jamming during lifting and ensuring the accuracy of the lifting direction. Secondly, the threaded connection features "micro-adjustment," allowing for precise adjustment of the lifting cylinder height by controlling the number of rotations of the threaded lifting rod. This accurately matches the different support height requirements of concrete support, solving the problem of difficulty in micro-adjustment in traditional hydraulic or motor-driven devices. Furthermore, the self-locking function of the threaded connection keeps the lifting cylinder and threaded lifting rod relatively fixed after the drive stops, stably maintaining the support height and support force, preventing the lifting cylinder from sliding down due to external forces or its own weight, further enhancing the stability and reliability of the device.

[0027] As a further improvement to the above technical solution, the outer wall of the lifting cylinder is provided with a limiting slider, and the limiting slider is configured in several groups, with the limiting sliders symmetrically arranged against the bottom of the lifting cylinder.

[0028] The inner wall of the lifting sleeve is provided with a groove that matches the limiting slider, and the limiting slider is slidably disposed in the groove.

[0029] The above technical solution offers the following advantages: The engagement and constraint between the limiting slider and the sliding groove effectively restricts the movement direction of the lifting cylinder, forcing it to slide vertically only along the lifting sleeve. This completely avoids the problem of the lifting cylinder rotating synchronously when the threaded lifting rod rotates, ensuring stable and non-deviation-prone lifting action. The symmetrically distributed limiting slider design ensures uniform force on the lifting cylinder, preventing tilting and jamming caused by uneven force on one side during lifting, thus guaranteeing smooth lifting. Furthermore, the structure effectively prevents the lifting cylinder from detaching from the lifting sleeve during ascent by limiting the stroke of the limiting slider through the sliding groove, avoiding the risk of structural collapse due to excessive lifting. It also further reduces swaying between the lifting cylinder and the lifting sleeve, enhancing the device's stable support effect on the concrete support and providing a safe and stable structural guarantee for precise adjustment of the support height.

[0030] As a further improvement to the above technical solution, the cross-section of the limiting slider and the groove is "rectangular" or "semi-circular".

[0031] The above technical solutions offer the following advantages: When the cross-section is rectangular, the corner limiting effect of the rectangular structure is stronger, which can further restrict the horizontal displacement and rotation of the lifting cylinder, improve the structural stability during the lifting process, and is especially suitable for concrete support scenarios that require high support accuracy and need to withstand large lateral forces for a long time; When the cross-section is semi-circular, the arc-shaped contact surface can reduce the sliding friction resistance between the limiting slider and the slide groove, making the lifting action of the lifting cylinder smoother, reducing the operating force when manually driven, and making it more suitable for construction scenarios that require frequent adjustment of support height or where operators have high labor-saving needs; Both cross-section designs can optimize the user experience of the device from the dimensions of "stability" and "smoothness" respectively, while ensuring the limiting function, and improve the adaptability of the device to different construction conditions.

[0032] As a further improvement to the above technical solution, the deceleration and force-increasing mechanism includes a housing, a first gear, and a second gear;

[0033] The first gear and the second gear are disposed inside the housing. The bottom of the housing is fixed to the upper surface of the base. The housing is disposed on the side near the input end of the drive shaft, and the input end of the drive shaft extends into the housing. The first gear is fixed to the input end of the drive shaft. The output end of the hand crank is movably disposed on the outer side of the housing. The second gear is fixed to the output end of the hand crank. The first gear is located below the second gear, and the first gear meshes with the second gear.

[0034] The size and radius of the first gear are greater than those of the second gear, and the cross-sectional thickness of the second gear is greater than that of the first gear.

[0035] The above technical solution offers the following advantages: The outer casing encapsulates the first and second gears, isolating them from dust, debris, and external impacts in the construction environment, protecting the gear transmission structure from damage, and ensuring the stability of the overall transmission assembly by fixing them to the base. The first gear is fixed to the input end of the transmission shaft, and the second gear is fixed to the output end of the hand crank, with the two meshing. Combined with the parameter design that "the number of teeth and radius of the first gear are greater than that of the second gear," a "small gear drives a large gear" transmission structure is formed. This ensures that the torque of the operator's hand crank is amplified and the rotational speed is reduced, significantly reducing the operational effort required to lift and lower the drive device, achieving efficient deceleration and power amplification, making manual drive more labor-saving. Simultaneously, the design that "the cross-sectional thickness of the second gear is greater than that of the first gear" ensures enhanced structural strength and load-bearing capacity of the second gear, which directly bears the manual drive, preventing long-term stress that could cause gear deformation or damage, and extending the service life of the transmission assembly. The overall structure is compact and functionally coordinated, ensuring stable power transmission while balancing labor-saving operation and structural durability, providing core support for the convenient and reliable use of the device without external drive.

[0036] As a further improvement to the above technical solution, a protective plate is provided between the first lifting component and the second lifting component, and the protective plate is located above the drive shaft.

[0037] The above technical solution has the following advantages: the protective plate can directly form a physical shield for the drive shaft below and the transmission parts (such as bevel gears) that connect the drive shaft to the lifting assembly, so as to effectively prevent sand, cement residue, tool fragments and other debris from falling during construction from hitting or intruding into the transmission structure, avoid debris from jamming the drive shaft and wearing the transmission parts, ensure the smoothness and integrity of the transmission system, and provide dual protection for the stable operation of the device and construction safety.

[0038] As a further improvement to the above technical solution, the top surface of the U-shaped top plate is also provided with an anti-slip surface.

[0039] The above technical solution has the following beneficial effects: the anti-slip surface can significantly increase the friction between the U-shaped top plate and the concrete support surface, effectively preventing the relative sliding of the supporting top plate and the concrete structure caused by vibration, external disturbance or the self-weight of the concrete during construction, and preventing the deviation of the support position from affecting the shape accuracy of the concrete after solidification; at the same time, the anti-slip structure can also improve the support reliability of the supporting top plate on the concrete structure, reduce the damage to the support surface caused by local stress concentration, and ensure that the concrete is always in the preset support state during solidification, further ensuring the quality and safety of concrete support operations. Attached Figure Description

[0040] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 This is a front sectional view of the overall structure of the synchronous support device;

[0042] Figure 2 This is an enlarged schematic diagram of a portion of the transmission structure of the synchronous support device;

[0043] Figure 3 A frontal sectional view of a portion of the lifting assembly;

[0044] Figure 4 This is a top view of a partial structure of the lifting assembly;

[0045] Explanation of reference numerals in the attached figures;

[0046] 1-Supporting top plate; 2-Synchronous lifting mechanism; 3-Base; 11-Placement plate; 12-U-shaped top plate; 21-Hand crank device; 22-Deceleration and force amplification mechanism; 23-First lifting component; 24-Drive shaft; 25-Second lifting component; 221-Outer shell; 222-First gear; 223-Second gear; 231-Lifting cylinder; 232-Lifting sleeve; 233-Threaded lifting rod; 234-First bevel gear; 235-Support block; 236-Limiting slider; 237-Slide groove; 4-Second bevel gear; 5-Threaded cavity; 8-Protective plate; 9-Anti-slip surface. Detailed Implementation

[0047] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0048] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0051] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] Example 1

[0053] like Figures 1-4 As shown, a synchronous support device includes a support top plate 1, a synchronous lifting mechanism 2, and a base 3; the bottom of the synchronous lifting mechanism 2 is welded and fixed to the upper surface of the base 3, and the bottom of the support top plate 1 is fixed to the output end of the synchronous lifting mechanism 2 by bolts.

[0054] The supporting top plate 1 includes a placement plate 11 and a U-shaped top plate 12. The placement plate 11 is made of steel plate, and its bottom is fixedly connected to the output end of the synchronous lifting mechanism 2 by bolts. The U-shaped top plate 12 is made of high-strength alloy steel plate bent and formed, and fixed to the top of the placement plate 11 by welding. The top surface of the U-shaped top plate 12 is also provided with an anti-slip surface 9. In this embodiment, the anti-slip surface 9 adopts a diamond pattern structure, which can effectively improve the friction with the concrete support surface.

[0055] The synchronous lifting mechanism 2 includes a first lifting component 23 and a second lifting component 25 symmetrically arranged vertically on the base 3, as well as a transmission shaft 24, a speed reduction and force amplification mechanism 22, and a hand crank device 21 for driving the two lifting components to move synchronously; the output ends of the first lifting component 23 and the second lifting component 25 are fixedly connected to the bottom of the placement plate 11 by bolts; the input end of the transmission shaft 24 is connected to the hand crank device 21 through the speed reduction and force amplification mechanism 22, and the output end of the transmission shaft 24 is connected to the input ends of the first lifting component 23 and the second lifting component 25.

[0056] The first lifting assembly 23 includes a lifting cylinder 231, a lifting sleeve 232, a threaded lifting rod 233, and a support block 235. The bottom of the lifting sleeve 232 is welded and fixed to the upper surface of the base 3. The drive shaft 24 passes through the bottom side wall of the lifting sleeve 232 and the two are connected by a bearing to ensure that the drive shaft 24 can rotate flexibly relative to the lifting sleeve 232.

[0057] The lifting cylinder 231 is slidably disposed within the lifting sleeve 232. The top of the lifting cylinder 231 is welded and fixed to the bottom of the placement plate 11. The support block 235 is welded or embedded and fixed within the lifting sleeve 232. The support block 235 is located between the bottom of the lifting cylinder 231 and the drive shaft 24. The bottom end of the threaded lifting rod 233 passes through the support block 235 in the vertical direction. The two are connected by a thrust bearing. The threaded lifting rod 233 is located at the central axis of the support block 235 to ensure that the threaded lifting rod 233 can rotate stably relative to the support block 235.

[0058] The bottom end of the threaded lifting rod 233 is connected to the transmission shaft 24. Specifically, a first bevel gear 234 is welded and fixed to the bottom end of the threaded lifting rod 233, and a second bevel gear 4 that is compatible with the first bevel gear 234 is welded and fixed to the transmission shaft 24. The first bevel gear 234 and the second bevel gear 4 mesh with each other, and the change of motion direction is realized through bevel gear transmission.

[0059] The top end of the threaded lifting rod 233 is threadedly connected to the bottom end of the lifting cylinder 231. The lifting cylinder 231 is provided with a threaded cavity 5, which is located at the central axis of the lifting cylinder 231. The internal thread of the threaded cavity 5 is adapted to the external thread of the threaded lifting rod 233. The threaded lifting rod 233 is threadedly connected to the threaded cavity 5, and the rotational motion is converted into linear motion through threaded transmission.

[0060] The second lifting component 25 is configured in the same way as the first lifting component 23 to ensure synchronous operation on both sides;

[0061] The outer wall of the lifting cylinder 231 is provided with a limiting slider 236, and two sets of limiting sliders 236 are provided, which are located symmetrically at the bottom of the lifting cylinder 231. The inner wall of the lifting sleeve 232 is provided with a sliding groove 237 that matches the limiting slider 236, and the limiting slider 236 is slidably disposed in the sliding groove 237. In this embodiment, the limiting slider 236 and the sliding groove 237 have a rectangular cross-section, which can provide a reliable limiting function.

[0062] The speed reduction and power amplification mechanism 22 includes a housing 221, a first gear 222, and a second gear 223. The first gear 222 and the second gear 223 are located inside the housing 221. The bottom of the housing 221 is fixed to the upper surface of the base 3 by bolts. The housing 221 is located on one side of the input end of the transmission shaft 24. The input end of the transmission shaft 24 extends into one side of the housing 221. The first gear 222 is fixed to the input end of the transmission shaft 24 by a key. The output end of the hand crank device 21 is movably located on one side of the housing 221. The second gear 223 is fixed to the output end of the hand crank device 21 by a key. The first gear 222 is located below the second gear 223, and the first gear 222 meshes with the second gear 223.

[0063] The first gear 222 has 60 teeth and a radius of 50mm, while the second gear 223 has 20 teeth and a radius of 20mm. The gear ratio achieves a 3:1 speed reduction and power increase effect. The cross-sectional thickness of the second gear 223 is 20mm, which is 10mm greater than the cross-sectional thickness of the first gear 222, ensuring that it has sufficient structural strength.

[0064] A protective plate 8 is also provided between the first lifting component 23 and the second lifting component 25. The protective plate 8 is made of thin steel plate and is fixed to the base 3 by a bracket. It is located above the transmission shaft 24 and can effectively protect the transmission components from damage by debris.

[0065] In this embodiment, after the hand crank device 21 has completed the rotation support, it can also be locked by a locking mechanism to further ensure that the lifting cylinder and the threaded lifting rod remain relatively fixed after the drive stops. The locking mechanism is a conventional technology in the art and will not be described in detail.

[0066] The working principle of this embodiment is as follows: During use, the device is placed under the concrete structure requiring support. By rotating the hand crank 21, its output end drives the second gear 223 to rotate. The second gear 223 meshes with the first gear 222. Since the first gear 222 is larger than the second gear 223, it achieves a speed reduction and force increase effect, reducing the operating effort. The first gear 222 drives the transmission shaft 24 to rotate. The transmission shaft 24, through the meshing of the second bevel gear 4 and the first bevel gear 234, drives the threaded lifting rods 233 on both sides to rotate synchronously. During rotation, the threaded lifting rods 233 interact with the internal threads of the lifting cylinder 231. The threaded engagement of cavity 5 pushes the lifting cylinder 231 to rise vertically along the lifting sleeve 232, while the limiting slider 236 slides along the slide groove 237 to ensure that the lifting cylinder 231 does not rotate. The lifting cylinders 231 on both sides rise synchronously, pushing the placement plate 11 and the U-shaped top plate 12 to rise until the U-shaped top plate 12 is in close contact with the concrete support surface, achieving stable support. Since a single drive shaft 24 drives the lifting components on both sides to move synchronously, it ensures that the left and right support heights are consistent and avoids tilting. The threaded drive structure can achieve precise adjustment of the support height to meet different support requirements. The entire device does not require external energy and is suitable for various construction scenarios.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A synchronous support device, characterized in that, It includes a supporting top plate (1), a synchronous lifting mechanism (2) and a base (3); the bottom of the synchronous lifting mechanism (2) is fixed to the upper surface of the base (3), and the bottom of the supporting top plate (1) is fixed to the output end of the synchronous lifting mechanism (2); The supporting top plate (1) includes a placement plate (11) and a U-shaped top plate (12); The bottom of the placement plate (11) is fixed to the output end of the synchronous lifting mechanism (2), and the U-shaped top plate (12) is fixed to the top of the placement plate (11); The synchronous lifting mechanism (2) includes a first lifting component (23) and a second lifting component (25) symmetrically arranged on the base (3) in the vertical direction, as well as a transmission shaft (24), a deceleration and force amplification mechanism (22) and a hand crank (21) for driving the two lifting components to move synchronously. The output ends of the first lifting assembly (23) and the second lifting assembly (25) are fixedly connected to the bottom of the placement plate (11); the input end of the transmission shaft (24) is connected to the hand crank device (21) through the deceleration and force amplification mechanism (22), and the output end of the transmission shaft (24) is connected to the input end of the first lifting assembly (23) and the second lifting assembly (25).

2. The synchronous support device according to claim 1, characterized in that, The first lifting assembly (23) includes a lifting cylinder (231), a lifting sleeve (232), a threaded lifting rod (233), and a support block (235). The bottom of the lifting sleeve (232) is fixed to the upper surface of the base (3), and the drive shaft (24) is provided through the bottom side wall of the lifting sleeve (232). The drive shaft (24) is rotatable relative to the lifting sleeve (232). The lifting cylinder (231) is slidably disposed inside the lifting sleeve (232). The top of the lifting cylinder (231) is fixed to the bottom of the placement plate (11). The support block (235) is fixed inside the lifting sleeve (232). The support block (235) is disposed between the bottom of the lifting cylinder (231) and the transmission shaft (24). The bottom end of the threaded lifting rod (233) is vertically inserted through the support block (235). The threaded lifting rod (233) is located at the central axis of the support block (235). The threaded lifting rod (233) is rotatable relative to the support block (235). The bottom end of the threaded lifting rod (233) is connected to the transmission shaft (24). The top end of the threaded lifting rod (233) is threadedly connected to the bottom end of the lifting cylinder (231). The second lifting component (25) is configured in the same way as the first lifting component (23).

3. The synchronous support device according to claim 2, characterized in that, The bottom end of the threaded lifting rod (233) is fixed with a first bevel gear (234), and the transmission shaft (24) is provided with a second bevel gear (4) that is adapted to the first bevel gear (234). The first bevel gear (234) meshes with the second bevel gear (4).

4. A synchronous support device according to claim 2, characterized in that, The lifting cylinder (231) is provided with a threaded cavity (5). The threaded cavity (5) is located near the central axis of the lifting cylinder (231). The internal thread of the threaded cavity (5) is adapted to the external thread of the threaded lifting rod (233). The threaded lifting rod (233) is threadedly connected to the threaded cavity (5).

5. A synchronous support device according to claim 2, characterized in that, The outer wall of the lifting cylinder (231) is provided with a limiting slider (236), and the limiting slider (236) is set in several groups. The limiting slider (236) is symmetrically arranged near the bottom of the lifting cylinder (231). The inner wall of the lifting sleeve (232) is provided with a groove (237) that is adapted to the limiting slider (236), and the limiting slider (236) is slidably disposed in the groove (237).

6. A synchronous support device according to claim 5, characterized in that, The limiting slider (236) and the groove (237) have a "rectangular" or "semi-circular" cross-section.

7. A synchronous support device according to claim 1, characterized in that, The deceleration and force amplification mechanism (22) includes a housing (221), a first gear (222), and a second gear (223); The first gear (222) and the second gear (223) are disposed inside the housing (221). The bottom of the housing (221) is fixed to the upper surface of the base (3). The housing (221) is disposed on the side near the input end of the transmission shaft (24). The input end of the transmission shaft (24) extends into the housing (221) on one side. The first gear (222) is fixed to the input end of the transmission shaft (24). The output end of the hand crank (21) is movably disposed on the side outside the housing (221). The second gear (223) is fixed to the output end of the hand crank (21). The first gear (222) is located below the second gear (223), and the first gear (222) meshes with the second gear (223).

8. A synchronous support device according to claim 7, characterized in that, The size and radius of the first gear (222) are greater than those of the second gear (223), and the cross-sectional thickness of the second gear (223) is greater than that of the first gear (222).

9. A synchronous support device according to claim 1, characterized in that, A protective plate (8) is provided between the first lifting component (23) and the second lifting component (25), and the protective plate (8) is located above the drive shaft (24).

10. A synchronous support device according to claim 1, characterized in that, The top surface of the U-shaped top plate (12) is also provided with an anti-slip surface (9).

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