Height adjusting device

Abstract

The utility model relates to the technical field of municipal engineering construction, and discloses a height adjusting device which comprises a base, a joist, a telescopic mechanism and a first inclined connecting rod, the joist is transversely arranged above the base, and a gap is formed between the joist and the base; the telescopic mechanism is arranged on the base, the telescopic end of the telescopic mechanism stretches out and draws back in the first direction, and the first direction and the height direction of the joist form an angle. The first inclined connecting rod is obliquely arranged between the joist and the base, one end of the first inclined connecting rod is rotationally connected with the telescopic end of the telescopic mechanism, and the other end of the first inclined connecting rod is rotationally connected with the joist. The telescopic end of the telescopic mechanism stretches out and draws back towards the first direction forming the angle with the height direction of the joist, the vertical stretching out and drawing back mode in the prior art is changed, and the height adjusting precision does not only depend on the stretching out and drawing back precision of the telescopic end; the telescopic motion of the telescopic mechanism is converted into the lifting motion of the joist by utilizing the lever principle, so that the precision of the height adjusting device is improved.

Description

Technical Field

[0001] This utility model relates to the field of municipal engineering construction technology, specifically to a height adjustment device. Background Technology

[0002] During the construction of municipal bridges, a temporary support system needs to be built, and the height of the bridge needs to be adjusted with the help of temporary supports, so as to ensure the accuracy of bridge installation.

[0003] For example, Chinese patent document CN221919042U discloses a bridge construction temporary support with adjustable height, which uses a hydraulic lifting mechanism to raise the top plate and provide temporary support for the bridge.

[0004] However, in the above scheme, the hydraulic lifting mechanism is adjusted vertically, and the distance the roof rises depends on the precise control of the hydraulic telescopic rod. In actual operation, it is difficult to achieve high-precision control of the roof's rising distance. Utility Model Content

[0005] In view of this, the present invention provides a height adjustment device, which aims to solve the defect of insufficient accuracy in the height adjustment of temporary supports during bridge construction.

[0006] Contents of this program:

[0007] This utility model provides a height adjustment device, including a base, a support beam, a telescopic mechanism, and a first diagonal connecting rod. The support beam is horizontally arranged above the base and has a gap between it and the base. The telescopic mechanism is arranged on the base, and its telescopic end extends and retracts in a first direction, which is at an angle to the height direction of the support beam. The first diagonal connecting rod is inclinedly arranged between the support beam and the base, with one end of the first diagonal connecting rod rotatably connected to the telescopic end of the telescopic mechanism and the other end of the first diagonal connecting rod rotatably connected to the support beam.

[0008] By setting a base, a stable support foundation is provided for the entire device. A horizontally positioned support beam above the base and spaced apart from it is used to support the object to be supported. The telescopic mechanism is set on the base, and the telescopic end of the mechanism extends and retracts in a first direction at an angle to the height direction of the support beam. This changes the vertical telescopic method in the prior art, so that the entire height adjustment process no longer relies solely on the precise linear displacement control of the telescopic end. Furthermore, by using a first inclined connecting rod set at an angle between the support beam and the base, with one end of the first inclined connecting rod rotatably connected to the telescopic end of the telescopic mechanism and the other end rotatably connected to the support beam, the telescopic movement of the telescopic mechanism is converted into the lifting and lowering movement of the support beam using the lever principle. This improves the accuracy of the height adjustment device with a more easily controlled mechanical transmission method, thereby effectively improving the shortcomings of existing height adjustment devices in actual operation, where the accuracy of the telescopic end of the telescopic mechanism may decrease due to long-term use or external environmental factors (such as temperature changes, vibration, etc.), resulting in insufficient accuracy of the top plate lifting height.

[0009] Optionally, it also includes a second inclined connecting rod, one end of which is rotatably connected to the first inclined connecting rod near the middle position, and the other end of which is rotatably connected to the base.

[0010] By adding a second diagonal connecting rod, with one end rotatably connected to the first diagonal connecting rod near the middle and the other end rotatably connected to the base, a more stable triangular support structure is constructed. Compared with relying solely on the first diagonal connecting rod, it can better limit the swaying of the support beam when facing external environmental factors such as wind impact and construction vibration, ensuring the stability of the support beam during the lifting process and thus improving the height adjustment accuracy. On the other hand, when the telescopic mechanism drives the first diagonal connecting rod to move, the second diagonal connecting rod can cooperate in bearing the force, sharing some of the pressure borne by the first diagonal connecting rod, avoiding deformation due to excessive force on a single connecting rod, ensuring the reliability of the entire transmission structure, and making the lifting action of the support beam more precise and smooth, effectively solving the defect of insufficient precision in the height adjustment of temporary supports in bridge construction.

[0011] Optionally, the position where the second diagonal link is rotatably connected to the first diagonal link is closer to the support beam than the middle position of the second diagonal link.

[0012] By positioning the second diagonal link, which is rotatably connected to the first diagonal link, closer to the support beam than the middle position of the second diagonal link, during height adjustment, when the telescopic mechanism moves the first diagonal link, the eccentric arrangement of the connection point allows the second diagonal link to coordinate with the first diagonal link's movement with a more reasonable lever arm distribution. On one hand, this arrangement more effectively restrains the first diagonal link, suppressing torsion or lateral displacement caused by uneven force distribution; on the other hand, it makes the support beam move more smoothly during lifting and lowering, reducing swaying caused by stress concentration within the structure, thereby further improving the stability of the entire device during height adjustment and ensuring that the height adjustment of the temporary support for bridge construction achieves higher precision requirements.

[0013] Optionally, the second diagonal link is connected to the first diagonal link via a bearing.

[0014] By using bearings to connect the second and first inclined connecting rods, the bearings significantly reduce the friction at the connection point when the telescopic mechanism drives the first inclined connecting rod during the operation of the height adjustment device. On one hand, this makes the rotation of the first inclined connecting rod more flexible and smooth, avoiding motion lag caused by excessive frictional resistance, ensuring efficient force transmission, and allowing the support beam to respond more precisely to the telescopic mechanism's extension and retraction actions. On the other hand, it effectively reduces wear caused by friction at the connection point, extends the service life of components, reduces the risk of structural accuracy degradation due to component wear, and ensures that the temporary support for bridge construction maintains high accuracy during long-term, frequent height adjustment operations.

[0015] Optionally, the second diagonal connecting rod is connected to the base via a bearing.

[0016] By using bearings to connect the second diagonal link to the base, the bearings significantly reduce the frictional resistance between the second diagonal link and the base when the telescopic mechanism activates and triggers the linkage of various components during the operation of the height adjustment device. On one hand, this makes the rotation of the second diagonal link relative to the base smoother, improving the coordination of the entire linkage structure during stress, ensuring the smooth lifting and lowering of the support beam, and thus improving the accuracy of height adjustment. On the other hand, it reduces heat generated by friction and component wear, preventing structural loosening due to wear at the base connection, thereby maintaining the stability of the device structure and ensuring that the temporary supports used in bridge construction can always provide reliable and high-precision support for bridge height adjustment during long-term use.

[0017] Optionally, the telescopic mechanism and the first diagonal connecting rod have at least two sets arranged symmetrically.

[0018] By setting at least two sets of symmetrical telescopic mechanisms and a first diagonal connecting rod, multiple structures can work together during the height adjustment of temporary supports in bridge construction. On the one hand, this ensures more even stress distribution on the supporting beam, avoiding problems such as tilting and swaying caused by excessive or uneven stress at a single point, guaranteeing smooth and precise lifting and lowering of the supporting beam, and improving the accuracy of height adjustment. On the other hand, the multiple structures serve as backups for each other; if one set malfunctions or experiences abnormal stress, the remaining sets can still operate normally, maintaining the basic functions of the entire device. This enhances the reliability and stability of the device in complex construction environments, ensuring that the bridge construction process is not significantly affected and that the height adjustment of the temporary supports can always be completed efficiently and with high precision.

[0019] Optionally, the two sets of first diagonal connecting rods arranged symmetrically extend in opposite directions toward one end of the support beam.

[0020] By having two sets of symmetrically arranged first diagonal connecting rods extend in opposite directions towards one end of the supporting beam, the height adjustment of the temporary support during bridge construction is achieved in two ways. First, this opposite tilting extension allows the supporting beam to obtain stable and balanced support from different directions during lifting and lowering, as if pulling the supporting beam from both sides, effectively suppressing possible lateral displacement of the supporting beam, further improving the stability of lifting and lowering the supporting beam, and ensuring the accuracy of height adjustment. Second, the opposite tilting directions of the two sets of diagonal connecting rods can offset some of the external force interference when dealing with external lateral forces such as wind and construction vibration, avoiding the transmission of external forces to the supporting beam and causing swaying, ensuring that the bridge structure on the temporary support remains stable, and helping to complete the height adjustment task in bridge construction with high precision.

[0021] Optionally, the telescopic mechanism includes a hydraulic pump and a hydraulic push rod.

[0022] By employing a telescopic mechanism composed of a hydraulic pump and hydraulic push rods, the height adjustment of temporary supports during bridge construction offers several advantages. First, the hydraulic pump, as a power source, provides stable and powerful thrust or pull force to the hydraulic push rods, precisely controlling their telescopic movement and thus accurately adjusting the height of the supporting beam. Furthermore, the linkage mechanism formed by the telescopic mechanism and the first inclined connecting rod exhibits smaller errors and higher adjustment accuracy compared to traditional vertical lifting hydraulic push rods. This is because the potential errors from horizontal hydraulic push rods can be mitigated and compensated to some extent during the rotation of the connecting rods and the lifting of the supporting beam, thereby improving the insufficient accuracy of previous vertical telescopic mechanisms. Second, the hydraulic system possesses excellent self-locking characteristics. Once adjusted to the required height, the hydraulic push rods remain in place even under external impact, ensuring the supporting beam stably supports the bridge structure and providing a reliable guarantee for high-precision height adjustment during bridge construction.

[0023] Optionally, the first diagonal connecting rod is connected to the telescopic end of the telescopic mechanism via a bearing.

[0024] By connecting the first diagonal connecting rod to the telescopic end of the telescopic mechanism using a bearing, the height adjustment device achieves several advantages during operation. First, the bearing significantly reduces friction at the connection point, allowing the first diagonal connecting rod to rotate smoothly during telescopic movement. This ensures precise and efficient force transmission, enabling the support beam to adjust its height accurately according to the telescopic mechanism's movements, avoiding adjustment errors caused by friction jamming. Second, it reduces wear at the connection point, extends component lifespan, and ensures the device maintains optimal working condition and consistently performs high-precision adjustment during frequent and long-term bridge construction height adjustment operations. This lays the foundation for the reliable operation of temporary supports in bridge construction.

[0025] Optionally, the first diagonal connecting rod is connected to the supporting beam via a bearing.

[0026] By connecting the first inclined connecting rod to the supporting beam with a bearing, when the height adjustment device is put into use, on the one hand, the bearing can effectively reduce the frictional resistance at the connection point, allowing the supporting beam to respond flexibly and accurately follow the movement of the first inclined connecting rod as it rotates under the drive of the telescopic mechanism and pushes the supporting beam up and down. This avoids lag or deviation in the movement of the supporting beam due to frictional resistance, ensuring the accuracy of height adjustment. On the other hand, it reduces wear on the connection points, ensuring that the connection between the first inclined connecting rod and the supporting beam remains stable and reliable even after long-term and frequent use, maintaining the stability of the entire device structure and creating favorable conditions for the continuous and precise adjustment of bridge height using temporary supports during bridge construction. Attached Figure Description

[0027] 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.

[0028] Figure 1 This is a front view of a height adjustment device according to an embodiment of the present utility model;

[0029] Figure 2 for Figure 1 Side view of the height adjustment device shown.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Base; 2. Support beam; 3. Telescopic mechanism; 4. First diagonal connecting rod; 5. Second diagonal connecting rod; 6. Hydraulic pump; 7. Hydraulic push rod. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] In the field of municipal engineering construction technology, when constructing municipal bridges, it is necessary to build a temporary support system and use temporary supports to adjust the height of the bridge to ensure the installation accuracy. However, in practice, existing supports used to adjust the height of temporary bridge supports are difficult to achieve high-precision control over the rising distance of the top slab.

[0034] This embodiment addresses the shortcomings of existing temporary supports for adjusting bridge height due to insufficient precision by proposing a height adjustment device.

[0035] like Figure 1 and Figure 2 As shown, the height adjustment device provided in this embodiment mainly includes a base 1, a support beam 2, a telescopic mechanism 3, and a first diagonal connecting rod 4.

[0036] Specifically, the base 1 serves as the foundation of the entire device, the support beam 2 is placed horizontally above the base 1 with a certain gap between them, the telescopic mechanism 3 is installed on the base 1, and its telescopic end can extend and retract in a first direction, which is at an angle to the height direction of the support beam 2, the first diagonal connecting rod 4 is placed obliquely between the support beam 2 and the base 1, one end of the diagonal connecting rod is rotatably connected to the telescopic end of the telescopic mechanism 3, and the other end is rotatably connected to the support beam 2.

[0037] In this embodiment, the basic structure of the height adjustment device is defined. Specifically, a base 1 provides a stable support foundation for the entire device; a support beam 2, horizontally positioned above and spaced from the base 1, is used to support the object to be supported; a telescopic mechanism 3, mounted on the base 1, extends and retracts its telescopic end in a first direction at an angle to the height direction of the support beam 2. This changes the vertical extension and retraction method of the height adjustment device in the prior art, so that the entire height adjustment process no longer relies solely on the precise linear displacement control of the telescopic end. Specifically, a first inclined connecting rod 4 is inclined between the support beam 2 and the base 1, with one end of the first inclined connecting rod 4 rotatably connected to the telescopic end of the telescopic mechanism 3 and the other end rotatably connected to the support beam 2. By utilizing the lever principle, the extension and retraction motion of the telescopic mechanism 3 is converted into the lifting and lowering motion of the support beam 2, thereby improving the accuracy of the height adjustment device with a more easily controllable mechanical transmission method.

[0038] Specifically, the telescopic mechanism 3 and the first inclined connecting rod 4 constitute a linkage mechanism. In this linkage mechanism, a stable geometric relationship is formed between the telescopic amount of the telescopic mechanism 3 and the lifting height of the supporting beam 2. For example, when the telescopic end of the telescopic mechanism 3 extends or retracts along the first direction (at an angle with the height direction of the supporting beam 2), the lifting height of the supporting beam 2 can be relatively stably calculated using parameters such as the length and angle of the connecting rod and the telescopic amount of the telescopic mechanism 3, based on the geometric relationship and the lever principle. This mechanical transmission method has relatively low requirements for the linear displacement accuracy of the telescopic end of the telescopic mechanism 3. Even if there is a certain error in the movement of the telescopic end of the telescopic mechanism 3, due to the existence of the linkage mechanism, these errors can be dispersed and compensated to a certain extent during the rotation of the connecting rod and the lifting of the supporting beam 2. Unlike the vertical jacking method, in vertical jacking, any displacement error of the telescopic end will almost directly reflect the lifting height error of the top plate. However, when using the linkage mechanism to lift the top plate, the error of the telescopic end can be absorbed and adjusted to a certain extent by factors such as the change in the rotation angle of the connecting rod, thereby improving the lifting height accuracy of the supporting beam 2. This effectively improves the shortcomings of existing height adjustment devices in actual operation, where the accuracy of the telescopic end of the telescopic mechanism 3 may decrease due to prolonged use or the influence of external environmental factors (such as temperature changes, vibration, etc.), resulting in insufficient accuracy of the lifting height of the top plate.

[0039] It should be noted that this embodiment does not limit the structural details of the height adjustment device, nor does it limit the arrangement and relationship between the telescopic mechanism 3 and the first inclined connecting rod 4, or the specific type and connection method of the telescopic mechanism 3.

[0040] The structural details of the height adjustment device in this embodiment will be described in detail below.

[0041] like Figure 1 and Figure 2As shown, in some embodiments, in addition to the height adjustment device described above, a second inclined connecting rod 5 is also provided, one end of which is rotatably connected to the middle part of the first inclined connecting rod 4, and the other end is rotatably connected to the base 1.

[0042] In this embodiment, those skilled in the art will understand that by adding this second diagonal link 5, a more stable and complex mechanical support structure is constructed. When the height adjustment device is in the complex on-site environment of municipal bridge construction, facing complex external force interferences such as ground vibration caused by frequent passing vehicles around the construction site, low-frequency vibration caused by the operation of large construction machinery, and possible strong winds, the second diagonal link 5 can work closely with the first diagonal link 4. On the one hand, it acts like an extra sturdy shackle on the support beam 2, strengthening its support stability from a mechanical structure perspective and effectively suppressing the swaying and deviation of the support beam 2 caused by external forces, so that the support beam 2 can always remain as stable as possible during the lifting process. On the other hand, when the telescopic mechanism 3 is activated and drives the first inclined connecting rod 4 to move in order to achieve the height adjustment of the support beam 2, the second inclined connecting rod 5 can reasonably share the pressure borne by the first inclined connecting rod 4 with its unique connection position and structural characteristics, avoiding the first inclined connecting rod 4 from deforming, twisting or even being damaged due to bearing a large force alone for a long time. This ensures that the support beam 2 can accurately and smoothly achieve the lifting action according to the needs, and effectively improves the accuracy of the entire height adjustment device.

[0043] like Figure 1 and Figure 2 As shown, in some embodiments, the position where the second diagonal link 5 is rotatably connected to the first diagonal link 4 is closer to the support beam 2 than the middle position of the second diagonal link 5 itself.

[0044] In this embodiment, those skilled in the art will understand that, through this eccentrically positioned connection, when the telescopic mechanism 3 drives the first diagonal link 4 to move according to construction needs, thereby raising and lowering the support beam 2, the second diagonal link 5 can work in coordination with the first diagonal link 4 in an optimized lever arm distribution state. On the one hand, because the connection point is closer to the support beam 2, the restraining effect of the second diagonal link 5 on the first diagonal link 4 is more precise and efficient, effectively suppressing the torsional tendency of the first diagonal link 4 due to uneven force distribution, as well as the possible lateral offset phenomenon, maximizing the stability of the support beam 2 throughout the raising and lowering process, and avoiding height adjustment errors caused by swaying; on the other hand, this eccentric connection structure makes the force transmission path of the support beam 2 during the raising and lowering process more reasonable and smooth, effectively reducing unnecessary swaying caused by stress concentration inside the structure. In this way, even in the face of many harsh working conditions such as strong winds and frequent vibrations of large construction equipment at the construction site, the height adjustment device can still accurately and stably adjust the height of the temporary support, laying a solid foundation for the continuous and stable high-precision adjustment function.

[0045] like Figure 1 and Figure 2 As shown, in some embodiments, the second diagonal link 5 and the first diagonal link 4 are connected by bearings.

[0046] In this embodiment, those skilled in the art will understand that the bearing, as a connecting medium, can significantly reduce the frictional force generated at the connection point between the second inclined connecting rod 5 and the first inclined connecting rod 4 during relative rotation. As a result, during the process where the telescopic mechanism 3 drives the first inclined connecting rod 4 to rotate as needed, thereby causing the support beam 2 to complete the lifting action, the force transmission is smoother, making the rotation of the first inclined connecting rod 4 extremely flexible. The support beam 2 can also respond promptly and accurately to the dynamics of the first inclined connecting rod 4, effectively avoiding the jamming and lag caused by frictional resistance, significantly reducing height adjustment errors, and thus ensuring adjustment accuracy. On the other hand, the presence of the bearing greatly reduces wear at the connection point, allowing the connection between the second inclined connecting rod 5 and the first inclined connecting rod 4 to maintain good mechanical performance even during long-term frequent use. Even under high-intensity municipal bridge construction tasks, frequent height adjustment operations will not cause premature failure of the connecting components, always ensuring the stability and reliability of the entire device structure, laying a solid foundation for the continuous and stable performance of high-precision adjustment functions.

[0047] like Figure 1 and Figure 2 As shown, in some embodiments, the second diagonal link 5 is connected to the base 1 by means of a bearing.

[0048] In this embodiment, those skilled in the art will understand that when this height adjustment device is applied to municipal bridge construction, on the one hand, the bearing connection makes the rotation of the second inclined connecting rod 5 relative to the base 1 extremely smooth. During the process of the telescopic mechanism 3 driving the first inclined connecting rod 4, and thus driving the entire connecting rod structure to operate, this smooth rotation can effectively reduce the additional resistance caused by friction at the connection point, ensuring the smooth transmission of force throughout the structure, making the lifting action of the support beam 2 more stable and precise, and greatly improving the accuracy of height adjustment. On the other hand, since the bearing bears most of the friction loss, it greatly reduces the wear at the connection point between the second inclined connecting rod 5 and the base 1. Even under long-term and frequent use, and under harsh working conditions such as wind and rain at the construction site and vibration and impact of construction equipment, it can still ensure that the connection point is firm and reliable, maintain the stability of the entire device structure, avoid the decrease in adjustment accuracy caused by problems such as loose connection, and effectively solve the defect of insufficient accuracy of temporary supports in height adjustment during bridge construction.

[0049] The following is a detailed description of the arrangement and relationship between the telescopic mechanism 3 and the first diagonal connecting rod 4 in this embodiment.

[0050] like Figure 1 and Figure 2 As shown, in some embodiments, there are at least two sets of telescopic mechanism 3 and first diagonal connecting rod 4, and they are arranged symmetrically.

[0051] In this embodiment, those skilled in the art will understand that the multiple symmetrically arranged telescopic mechanisms 3 and the first diagonal connecting rod 4 ensure more uniform force distribution on the supporting beam 2 during lifting and lowering. Compared to a single-unit structure, this avoids problems such as tilting and swaying of the supporting beam 2 that are easily caused by uneven force distribution at a single point, effectively ensuring that the supporting beam 2 can achieve smooth and precise lifting and lowering actions, and greatly improving the accuracy and stability of height adjustment. On the other hand, this symmetrical arrangement is equivalent to adding redundancy to the device. In complex, changeable, and uncertain construction sites, if one set of telescopic mechanisms 3 or the first diagonal connecting rod 4 fails, the remaining sets can still maintain basic support and adjustment functions, ensuring that the entire construction process is not greatly affected and continuously providing reliable height adjustment capability for the temporary supports of bridge construction.

[0052] like Figure 1 and Figure 2 As shown, in some embodiments, for the two sets of first diagonal connecting rods 4 arranged symmetrically, they extend in opposite directions toward one end of the support beam 2.

[0053] In this embodiment, those skilled in the art will understand that, on the one hand, this design of extending in opposite directions allows the support beam 2 to obtain balanced support forces from different directions during lifting and lowering, effectively suppressing possible lateral displacement of the support beam 2, greatly improving the stability of lifting and lowering the support beam 2, and making height adjustment more precise; on the other hand, when facing complex external interference at the construction site, such as strong winds and irregular vibrations caused by the operation of large construction equipment, the two sets of first diagonal connecting rods 4 with opposite inclinations can effectively offset the resistance applied by the outside world by virtue of their own structural layout. This avoids these external forces being directly transmitted to the support beam 2, causing the support beam 2 to sway or shift, thereby ensuring that the bridge structure on the temporary support always remains stable, providing a solid guarantee for high-precision adjustment of the height of the temporary support.

[0054] The specific type and connection method of the telescopic mechanism 3 in this embodiment will be described in detail below.

[0055] like Figure 1 and Figure 2 As shown, in some embodiments, the telescopic mechanism 3 includes a hydraulic pump 6 and a hydraulic push rod 7.

[0056] In this embodiment, those skilled in the art will understand that the hydraulic pump 6, as a power source, provides stable and controllable power to the hydraulic push rod 7. The pressure output by the hydraulic pump 6 can be precisely adjusted, thereby accurately controlling the extension and retraction stroke of the hydraulic push rod 7. This allows the lifting height of the support beam 2 to be adjusted with high precision according to construction needs. Furthermore, due to the existence of the aforementioned linkage mechanism, the hydraulic push rod 7, which is traditionally used for vertical lifting, has smaller errors and higher adjustment accuracy after being transformed into a horizontally driven linkage mechanism that enables vertical lifting. The potential errors generated by the hydraulic push rod 7 can be dispersed and compensated to a certain extent during the rotation of the linkage and the lifting of the support beam 2. This also improves upon the previous shortcomings of insufficient precision in vertical telescopic mechanisms 3. Simultaneously, the hydraulic system itself possesses self-locking characteristics. After the height adjustment of the support beam 2 is completed, even if there are external impacts at the construction site, such as collisions with construction equipment or wind, the hydraulic push rod 7 can remain in a predetermined position due to its self-locking function, firmly supporting the support beam 2. This effectively prevents unexpected changes in the support height due to external interference, ensuring the precision requirements during bridge construction.

[0057] In other embodiments, the telescopic mechanism 3 can be replaced by an electric actuator paired with a motor drive system. In some construction sites where power supply is stable and convenient, the electric actuator, under precise motor control, can also accurately control the telescopic stroke, achieving precise adjustment of the beam 2's height. Furthermore, compared to hydraulic systems, electric systems are relatively simple to maintain, eliminating the need to address common hydraulic problems such as hydraulic oil leaks and pump wear, reducing later maintenance costs. As long as the motor control accuracy meets the standards, the problem of insufficient height adjustment precision of the temporary support can be solved. Additionally, a telescopic mechanism 3 composed of a pneumatic actuator, an air source, and a control valve can also be considered. For construction sites with compressed air sources, the pneumatic actuator has a fast response speed and can quickly adjust the beam 2's height. Its advantage lies in the compressibility of gas, which can buffer external impacts to a certain extent, preventing damage to the device due to sudden external forces, further ensuring the temporary support stably supports the bridge under complex working conditions and precisely adjusts its height. In other words, whether the telescopic mechanism 3 is configured as a hydraulic pump 6 and hydraulic actuator 7, an electric actuator paired with a motor drive system, or a pneumatic actuator paired with an air source and control valve, it falls within the protection scope of this embodiment.

[0058] like Figure 1 and Figure 2 As shown, in some embodiments, the first diagonal link 4 is connected to the telescopic end of the telescopic mechanism 3 by a bearing.

[0059] In this embodiment, those skilled in the art will understand that the bearing connection significantly reduces the friction between the first inclined connecting rod 4 and the telescopic end of the telescopic mechanism 3 during relative rotation. This allows the telescopic mechanism 3 to smoothly and unimpededly transmit force to the first inclined connecting rod 4 during operation, enabling the first inclined connecting rod 4 to respond flexibly and precisely to the telescopic movement of the telescopic mechanism 3, driving the support beam 2 to rise and fall smoothly. This avoids adjustment errors caused by friction and jamming at the connection points, effectively ensuring the accuracy of height adjustment. On the other hand, the bearing significantly reduces wear at the connection point, maintaining the tightness and stability of the connection between the first inclined connecting rod 4 and the telescopic end of the telescopic mechanism 3 even under high-intensity construction conditions with frequent long-term use. This ensures that the mechanical structure of the entire device remains in good condition and continuously and stably performs its high-precision adjustment function.

[0060] like Figure 1 and Figure 2 As shown, in some embodiments, the first diagonal connecting rod 4 is connected to the support beam 2 via a bearing.

[0061] In this embodiment, those skilled in the art will understand that the bearing connection effectively reduces the friction between the first diagonal connecting rod 4 and the supporting beam 2 during relative rotation. As a result, during the process where the telescopic mechanism 3 drives the first diagonal connecting rod 4 to move, thereby raising and lowering the supporting beam 2, the supporting beam 2 can extremely sensitively follow the movement changes of the first diagonal connecting rod 4, accurately achieving height adjustment and avoiding movement deviations caused by frictional obstruction at the connection point, effectively ensuring high precision in height adjustment. Furthermore, the bearing significantly reduces wear at the connection point, ensuring a stable and reliable connection between the first diagonal connecting rod 4 and the supporting beam 2 even under long-term and frequent use, such as repeated adjustments to the temporary support height during municipal bridge construction, thus maintaining the stability of the entire device structure.

[0062] like Figure 1 and Figure 2 As shown, the installation process of a height adjustment device in this embodiment is as follows:

[0063] I. Preparation Phase: Place the height adjustment device at the required location for the temporary supports in the municipal bridge construction, ensuring that the base 1 is placed stably on the ground or supporting plane, providing a stable foundation for the entire device. The support beam 2 is positioned at an appropriate interval above the base 1, ready to support the bridge structure. Inspect the telescopic mechanism 3, including the hydraulic pump 6 and hydraulic push rod 7 (if this type of telescopic mechanism 3 is used), as well as all connecting rods and bearing connections, ensuring that the device is in good initial condition and that all components can operate normally.

[0064] 2. Activate the height adjustment device: When it is necessary to adjust the height of the temporary support, activate the telescopic mechanism 3. If the hydraulic push rod 7 is driven by the hydraulic pump 6, the hydraulic pump 6 works and supplies energy to the hydraulic push rod 7 according to the preset pressure value, so that the telescopic end of the hydraulic push rod 7 extends or retracts in a first direction at an angle to the height direction of the support beam 2.

[0065] III. The principle of height adjustment:

[0066] The telescopic end is rotatably connected to one end of the first inclined connecting rod 4. As the telescopic end moves, it drives the first inclined connecting rod 4 to rotate around its connection point with the base 1. The other end of the first inclined connecting rod 4 is rotatably connected to the support beam 2. During its rotation, based on the lever principle, the linear motion of the telescopic end of the telescopic mechanism 3 is converted into the lifting motion of the support beam 2. That is, the displacement of the telescopic end is converted into the height change of the support beam 2 in the vertical direction through geometric parameters such as the length and tilt angle of the first inclined connecting rod 4. The bearing connection between the second inclined connecting rod 5, the first inclined connecting rod 4, and the base 1 reduces friction, allowing the movement of each link to be more flexible and accurately respond to the action of the telescopic mechanism 3.

[0067] During this process, one end of the second diagonal connecting rod 5 is rotatably connected to the first diagonal connecting rod 4 near the middle position, and the connection position is closer to the support beam 2 than its own middle position; the other end is rotatably connected to the base 1. It works in conjunction with the first diagonal connecting rod 4, on the one hand, sharing the force of the first diagonal connecting rod 4 to prevent it from deforming due to uneven force; on the other hand, it strengthens the support stability of the support beam 2, suppresses the swaying of the support beam 2, and ensures that the support beam 2 rises and falls smoothly.

[0068] When the device employs at least two symmetrically arranged telescopic mechanisms 3 and first diagonal connecting rods 4, each structure needs to operate synchronously. Furthermore, the two symmetrically arranged first diagonal connecting rods 4 extend in opposite directions toward the support beam 2, enabling the support beam 2 to receive bidirectional balanced support during lifting and lowering, thus counteracting potential lateral forces, such as wind force or external force interference from construction vibrations, thereby improving the stability and accuracy of the lifting and lowering of the support beam 2.

[0069] IV. Height Lockdown and Maintenance:

[0070] Once the support beam 2 reaches the predetermined height, the self-locking characteristic of the hydraulic pump 6 is used to keep the hydraulic push rod 7 in its current telescopic state, which firmly supports the support beam 2, resists the impact of external forces at the construction site, ensures that the height of the temporary support remains unchanged in the subsequent construction process, and guarantees the accuracy of bridge construction.

[0071] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope of the present invention.

Claims

1. A height adjustment device, characterized in that, include: Base (1); A support beam (2) is arranged horizontally above the base (1) and has a gap between it and the base (1); Telescopic mechanism (3) is provided on the base (1). The telescopic end of the telescopic mechanism (3) extends and retracts in a first direction, which is at an angle to the height direction of the support beam (2). The first inclined connecting rod (4) is inclinedly disposed between the support beam (2) and the base (1). One end of the first inclined connecting rod (4) is rotatably connected to the telescopic end of the telescopic mechanism (3), and the other end of the first inclined connecting rod (4) is rotatably connected to the support beam (2).

2. The height adjustment device according to claim 1, characterized in that, Also includes: The second inclined connecting rod (5) has one end rotatably connected to the first inclined connecting rod (4) near the middle position, and the other end rotatably connected to the base (1).

3. The height adjustment device according to claim 2, characterized in that, The position where the second diagonal link (5) is rotatably connected to the first diagonal link (4) is closer to the support beam (2) than the middle position of the second diagonal link (5).

4. The height adjustment device according to claim 2, characterized in that, The second diagonal link (5) is connected to the first diagonal link (4) by a bearing.

5. The height adjustment device according to claim 2, characterized in that, The second diagonal connecting rod (5) is connected to the base (1) by a bearing.

6. The height adjustment device according to any one of claims 1-5, characterized in that, The telescopic mechanism (3) and the first diagonal connecting rod (4) have at least two sets arranged symmetrically.

7. The height adjustment device according to claim 6, characterized in that, The two sets of first diagonal connecting rods (4) arranged symmetrically extend in opposite directions toward one end of the support beam (2).

8. The height adjustment device according to any one of claims 1-5, characterized in that, The telescopic mechanism (3) includes a hydraulic pump (6) and a hydraulic push rod (7).

9. The height adjustment device according to any one of claims 1-5, characterized in that, The first diagonal connecting rod (4) is connected to the telescopic end of the telescopic mechanism (3) via a bearing.

10. The height adjustment device according to any one of claims 1-5, characterized in that, The first diagonal connecting rod (4) is connected to the supporting beam (2) via a bearing.

Images