Adjustable active clamping crawler

Abstract

The utility model provides an adjustable active clamping crawler which comprises an upper hoop, a lower hoop and a jacking oil cylinder connected between the upper hoop and the lower hoop, and the jacking oil cylinder is used for driving the upper hoop and the lower hoop to alternately crawl in a stepping mode. Each of the upper hoop and the lower hoop is formed by connecting two semi-ring assemblies through a pin shaft and a fastening bolt; each of the upper hoop and the lower hoop comprises an outer hoop assembly and an inner hoop assembly embedded in the outer hoop assembly; the outer hoop assembly is provided with an adjustable device used for adapting to the sizes of pier columns with different diameters. The inner hoop assembly comprises an inner hoop steel belt, a flange connecting block and a locking device assembly, and the locking device assembly is arranged between the two semi-ring hoops in a penetrating mode and drives the two semi-ring hoops to achieve clamping and loosening. According to the crawler, adaptive switching of bridge pier columns of different specifications can be achieved, and the turnover utilization rate of equipment is greatly increased; and the clamping force can be accurately controlled, and damage to the surface of the bridge pier stud can be effectively avoided in the crawling process of the crawler.

Description

Technical Field

[0001] This utility model relates to the field of bridge substructure construction technology, and in particular to an adjustable active clamping crawler. Background Technology

[0002] With the advancement of science and technology and the acceleration of urbanization in my country, bridge construction has become increasingly important. Crawler machines are crucial components in bridge construction, capable of automating many complex and high-risk bridge construction tasks, significantly improving work efficiency, reducing the time and cost of manual operation, and lowering operational difficulty and risk.

[0003] In existing technologies, crawlers typically employ disc spring locking and electric clamping methods when crawling up and down along bridge piers.

[0004] For example, Chinese patent application number CN202223075330.6 discloses a crawler for a bridge pier climbing formwork construction system. The crawler uses a disc spring locking method and the clamping method is passive clamping.

[0005] For example, Chinese patent application number CN202223056625.9 discloses a climbing device and a climbing system. The electric crawler clamping device uses screw clamping, and the clamping method is motor-driven active clamping.

[0006] The crawler structures commonly used in the prior art have the following drawbacks:

[0007] 1. Due to the different sizes and specifications of bridge piers in actual construction, none of the above-mentioned crawlers can adapt to a variety of different pier specifications with a single device. Therefore, their turnover rate is low, which is not conducive to promotion.

[0008] 2. When using disc spring locking, the clamping force of the crawler will change due to the change in the diameter of the pier column, resulting in inaccurate clamping force.

[0009] 3. When using an electric clamping device, there are problems such as heavy weight and high cost.

[0010] In summary, there is an urgent need for a bridge pier crawler that can adapt to different specifications of piers, has high precision in clamping force control, can significantly improve equipment turnover rate, and facilitates product promotion. Summary of the Invention

[0011] To address the aforementioned problems in the prior art, this utility model provides an adjustable active clamping crawler, which can adaptably switch between bridge piers of different specifications, significantly improving the equipment's turnover rate; moreover, the clamping force can be precisely controlled, and the crawler can effectively avoid damage to the surface of the bridge pier during the crawling process.

[0012] To achieve the above objectives, this utility model provides the following technical solution: an adjustable active clamping crawler, comprising an upper clamp, a lower clamp, and a lifting cylinder connected between the upper and lower clamps, wherein the lifting cylinder is used to drive the upper and lower clamps to perform alternating stepping crawling; both the upper and lower clamps are composed of two semi-ring assemblies connected by pins and fastening bolts; both the upper and lower clamps include an outer clamp assembly and an inner clamp assembly embedded inside the outer clamp assembly; the outer clamp assembly is provided with an adjustable device for adapting to the size of piers of different diameters.

[0013] In a preferred embodiment, the external clamp assembly is provided with adjustable devices in the horizontal, vertical and diagonal directions to accommodate the size of piers with different diameters.

[0014] In a preferred embodiment, the external clamp assembly includes two opposing transverse main frames, longitudinal connecting frames connected to the four corners of the inner walls of the two transverse main frames, and frame adjustment blocks connected between the two longitudinal connecting frames in the longitudinal direction. The inner walls of the transverse main frames are provided with multiple adjustable mounting holes, and the longitudinal connecting frames are adjustablely mounted on different holes in the transverse main frames in the transverse direction. The number of frame adjustment blocks in the longitudinal direction is adjustable, and can be set to one or more. The inner walls of the four longitudinal connecting frames are each equipped with elastic guide wheels for pressing against the bridge piers, and the elastic guide wheels are all positioned at a 45° angle inside the external clamp assembly.

[0015] In a preferred embodiment, an adjusting block for the guide wheel is installed between the elastic guide wheel and the longitudinal link frame to accommodate piers of different diameters. The number of the adjusting blocks is adjusted according to the diameter of the bridge pier.

[0016] In a preferred embodiment, the inner clamp assembly includes an inner clamp steel strip, a flange connecting block, and a locking device assembly. One end of the inner clamp steel strip and the flange connecting block are connected by a pin to form a semi-circular clamp. The locking device assembly is inserted between the two semi-circular clamps to drive the two semi-circular clamps to clamp and release the inner clamp steel strip.

[0017] In a preferred embodiment, the locking device assembly includes a hydraulic motor, a worm gear reducer, a transmission screw, a first connecting housing, and a second connecting housing. The worm gear reducer is connected to the power output end of the hydraulic motor. The worm gear reducer is mounted on the first connecting housing. One end of the transmission screw is connected to the worm gear via a key, and the other end passes sequentially through the first connecting housing, the inner clamping steel strip of one half-ring clamp, the connecting flange block connected to the other half-ring clamp, and the second connecting housing, before being fixed by an anti-rotation nut.

[0018] In a preferred embodiment, the outer surface of the anti-rotation nut is fitted with an anti-rotation clamping plate to prevent it from rotating together with the transmission screw, and the anti-rotation clamping plate is fixed to the connecting housing 2; a reverse baffle is also connected to the outside of the anti-rotation clamping plate, and the reverse baffle is fastened to the anti-rotation clamping plate by bolts.

[0019] When the lead screw rotates under the drive of the worm gear, the anti-rotation plate can prevent the anti-rotation nut from rotating with the lead screw, so that the lead screw rotates in place while driving the anti-rotation nut to move horizontally on the lead screw.

[0020] The lead screw and anti-rotation nut can have trapezoidal threads, enabling mechanical self-locking and giving the locking device self-locking performance. Furthermore, the hydraulic motor can integrate a brake, ensuring that the locking force of the locking device can be reliably maintained.

[0021] In a preferred embodiment, flange connecting lugs are provided on both the connecting flange block connected to one end of the inner clamp steel strip and the other end of the inner clamp steel strip. Two semi-circular mounting blocks are provided on the upper and lower parts of the two flange connecting lugs. The upper and lower surfaces of the first and second connecting boxes are connected by hinge shafts in a hinged manner. The four hinge shafts are respectively fixed on the four semi-circular mounting blocks by four rotating shaft pressure blocks. Both the first and second connecting boxes can rotate around the corresponding double hinge shafts.

[0022] In the preferred embodiment, the interior of the connecting housing 2 is provided with a disc spring, a disc spring pressure plate, and a pressure sensor in sequence from the inside to the outside. One side of the pressure sensor abuts against the anti-rotation nut, and the other side is fixed to the disc spring pressure plate.

[0023] In a preferred embodiment, the end of the transmission screw is further provided with a limiting nut to prevent the anti-rotation nut from dislodging from the transmission screw.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] 1. The outer clamp of this crawler can be adjusted in three directions: horizontal, longitudinal, and diagonal. The longitudinal connecting frame can be installed in different holes of the horizontal main frame to achieve horizontal adjustment. The longitudinal adjustment can be achieved by adding or removing frame adjustment blocks. The diagonal adjustment can be achieved by adding or removing guide wheel adjustment blocks. Through these three-way adjustments, the outer clamp assembly can adapt to piers of different diameters. By replacing the inner clamp steel belt, the adaptability to piers of different specifications can be achieved, which greatly improves the equipment turnover rate and reduces production costs.

[0026] 2. This utility model uses a screw and nut to achieve active locking, and the locking force will not change due to slight changes in the diameter of the bridge pier, so the locking force can be precisely controlled;

[0027] 3. The locking device of the inner clamp of this utility model adopts a screw locking method driven by a hydraulic motor, which can achieve precise clamping force control and obtain a larger opening gap, avoiding the inner clamp from scratching the pier column during the crawling process, which is safe and reliable.

[0028] 4. The inner clamp of this utility model adopts a method of simultaneous opening and locking from both sides, which can achieve a faster opening and closing speed compared to single-side driving;

[0029] 5. The crawler assembly of this utility model consists of two semi-ring assemblies connected by pins and fastening bolts, which can be quickly disassembled into two halves on site to achieve detachment from the pier column;

[0030] 6. The inner clamp steel strip of this utility model is provided with a flange connecting block. The inner clamp steel strip and the flange connecting block are connected by a pin to form a semi-ring clamp. The two semi-ring clamps are driven by two locking device assemblies to achieve clamping and loosening. Therefore, the inner clamp assembly can be separated in half by disassembling the pin. The locking device assembly does not need to be disassembled, so that the locking device assembly is always a whole, which enhances the convenience of disassembly and assembly.

[0031] 7. The connecting box of this utility model is equipped with a disc spring and a pressure sensor. The pressure sensor can accurately measure the clamping force, which enhances the reliability of the equipment. The disc spring can effectively maintain the clamping force, which enhances the stability of the clamping force. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of an adjustable active clamping crawler according to the present invention;

[0033] Figure 2 This is a schematic diagram of the connection structure of the left and right halves of the adjustable active clamping crawler according to the present invention;

[0034] Figure 3 This is a schematic diagram of the upper and lower clamping double-layer structure of an adjustable active clamping crawler according to the present invention;

[0035] Figure 4 This is an exploded view of the external clamp assembly of an adjustable active clamping crawler according to the present invention;

[0036] Figure 5 This is a schematic diagram of the external clamp assembly of an adjustable active clamping crawler suitable for smaller diameter piers according to this utility model;

[0037] Figure 6 This is a schematic diagram of the external clamp assembly of an adjustable active clamping crawler applicable to large-diameter piers according to this utility model;

[0038] Figure 7This is a schematic diagram of the overall structure of the inner clamp assembly of an adjustable active clamping crawler according to the present invention;

[0039] Figure 8 This is an exploded structural diagram of the inner clamp assembly of an adjustable active clamping crawler according to the present invention.

[0040] Figure 9 This is a schematic diagram of the locking device assembly of the inner clamping component of an adjustable active clamping crawler according to the present invention;

[0041] Figure 10 for Figure 9 Enlarged view of part A in the image;

[0042] Figure 11 This is an exploded view of the worm gear reducer of the inner clamp assembly of an adjustable active clamping crawler according to this utility model;

[0043] Figure 12 This is a structural cross-sectional view of the locking device assembly of the inner clamp component of an adjustable active clamping crawler according to the present invention;

[0044] Figure 13 This utility model discloses a hinged schematic diagram of the locking device assembly of the inner clamp component of an adjustable active clamping crawler.

[0045] Figure 14 This utility model presents a structural schematic diagram of the inner clamping steel belt of an adjustable active clamping crawler.

[0046] Figure 15 This utility model discloses a schematic diagram of the intermediate state of the inner clamp assembly when the locking device assembly of an adjustable active clamping crawler is in operation;

[0047] Figure 16 This utility model provides a schematic diagram of the clamping state of the inner clamping assembly of an adjustable active clamping crawler during operation;

[0048] Figure 17 This utility model discloses a schematic diagram of the loosened state of the inner clamp assembly when the locking device assembly of an adjustable active clamping crawler is in operation;

[0049] Figure 18 A cross-sectional view of a locking device assembly for an adjustable active clamping crawler without a pressure sensor.

[0050] The diagram is marked as follows:

[0051] 1. Crawler assembly;

[0052] 1.1 Upper clamp; 1.2 Lower clamp; 1.3 Lifting cylinder;

[0053] 2. Piers;

[0054] 3. Semi-ring assembly;

[0055] 4. Pin;

[0056] 5. Tighten the bolts;

[0057] 6. External clamp assembly;

[0058] 6.1 Horizontal main frame; 6.2 Longitudinal connecting frame; 6.3 Guide wheel adjusting block; 6.4 Elastic guide wheel; 6.5 Longitudinal adjusting block; 6.1.1 Adjustable mounting hole;

[0059] 7. Internal clamp assembly;

[0060] 7.1 Locking device assembly; 7.2 Inner clamp steel band; 7.2.1 Through hole one; 7.2.2 Semicircular mounting block one; 7.3 Flange connecting block; 7.3.1 Through hole two; 7.3.2 Semicircular mounting block two; 7.1.1 Hydraulic motor; 7.1.2 Worm gear reducer; 7.1.3 Shaft pressure block one; 7.1.4 Connecting housing one; 7.1.5 Drive screw; 7.1.6 Connecting housing two; 7.1.7 Disc spring; 7.1.8 Shaft pressure block two; 7.1.9 Disc spring pressure plate; 7.1.10 Pressure sensor; 7.1.11 Anti-rotation nut; 7.1.12 Anti-rotation clip Plate; 7.1.13, Reverse baffle; 7.1.14, Limit nut; 7.1.15, Proximity switch; 7.1.16, Plane; 7.1.2.1, End cover one; 7.1.2.2, Oil seal one; 7.1.2.3, Lock nut; 7.1.2.4, Bearing one; 7.1.2.5, Worm gear; 7.1.2.6, Key; 7.1.2.7, Transmission box; 7.1.2.8, Bearing two; 7.1.2.9, Oil seal two; 7.1.2.10, End cover two; 7.1.2.11, Bearing three; 7.1.2.12, Worm; 7.1.4.1, Double hinge shaft one; 7.1.6.1, Double hinge shaft two. Detailed Implementation

[0061] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0062] Example 1

[0063] Reference Figures 1 to 17The following is a further description of an embodiment of the adjustable active clamping crawler of the present invention.

[0064] like Figure 1 As shown, the crawler assembly 1 mainly consists of an upper clamp 1.1, a lower clamp 1.2, and a lifting cylinder 1.3. One end of the lifting cylinder 1.3 is fixed to the upper clamp 1.1, and the other end is fixed to the lower clamp 1.2. There are two lifting cylinders 1.3, which are positioned opposite each other on the middle of the upper clamp 1.1 and the lower clamp 1.2. Each lifting cylinder 1.3 has a guide device on both sides, which is a guide rod and guide sleeve type. The end of the guide rod is fixed to the upper clamp 1.1, and the end of the guide sleeve is fixed to the lower clamp 1.2.

[0065] Under the guidance of the guiding device and the driving action of the lifting cylinder 1.3, the lifting cylinder 1.3 extends and retracts, driving the upper clamp 1.1 and the lower clamp 1.2 to crawl alternately. The upper clamp 1.1 and the lower clamp 1.2 alternately clamp the pier 2, so that the crawler assembly 1 can crawl along the surface of the pier 2.

[0066] Figure 2 As shown, the crawler assembly 1 consists of two semi-ring assemblies 3 connected by pins 4 and fastening bolts 5. Each semi-ring assembly 3 includes half of the upper clamp 1.1 and half of the lower clamp 1.2 structure, and is connected as a whole by a guide device and a lifting cylinder 1.3. During on-site disassembly, only the pins 4 and fastening bolts 5 need to be removed to quickly separate the crawler assembly into two halves and detach it from the pier.

[0067] like Figure 3 As shown, both the upper clamp 1.1 and the lower clamp 1.2 have a double-layer structure. Taking the upper clamp 1.1 as an example, the upper clamp 1.1 consists of an outer clamp assembly 6 and an inner clamp assembly 7. The inner clamp assembly 7 is embedded inside the outer clamp assembly 6. The advantage of the double-layer structure is that the clamping and loosening action of the inner clamp assembly 7 will not cause the load on the outer clamp assembly to shake, thus ensuring stable operation.

[0068] like Figure 4 , Figure 5 , Figure 6As shown, the external clamp assembly 6 is equipped with adjustable devices in the transverse, longitudinal, and diagonal directions to accommodate piers of different diameters. The external clamp assembly 6 consists of a transverse main frame 6.1, a longitudinal connecting frame 6.2, a guide wheel adjusting block 6.3, an elastic guide wheel 6.4, and a frame adjusting block 6.5. The two transverse main frames 6.1 are arranged opposite each other. The inner wall of each transverse main frame 6.1 has adjustable mounting holes 6.1.1. The longitudinal connecting frame 6.2 can be installed in different holes on the two transverse main frames 6.1, allowing adjustment of the two longitudinal connecting frames 6.2 in the transverse direction. The frame adjusting block 6.5 connects the two longitudinal connecting frames 6.2 in the longitudinal direction. Adjustment of the external clamp assembly in the longitudinal direction can be achieved by adding or removing frame adjusting blocks 6.5, and one or more frame adjusting blocks 6.5 can be used. Four elastic guide wheels 6.4 are installed on the inner wall of the longitudinal connecting frame 6.2, and the elastic guide wheels 6.4 are distributed at a 45° position. Depending on the diameter of the bridge pier, guide wheel adjustment blocks 6.3 may or may not be added between the elastic guide wheels 6.4 and the longitudinal connecting frame 6.2. The position can be adjusted by adding or removing guide wheel adjustment blocks 6.3, thereby realizing the adjustment of the outer clamp assembly 6 in the oblique direction.

[0069] By adjusting these three directions, the external clamp assembly 6 can be adapted to piers of different diameters, such as... Figure 5 and 6 As shown. With Figure 5 compared to, Figure 6 The longitudinal connecting frame 6.2 was moved outward, a frame adjustment block 6.5 was added, and a guide wheel adjustment block 6.3 was added, so that the outer clamp assembly 6 could adapt to piers with larger diameters.

[0070] like Figure 7 and Figure 8 As shown, the inner clamp assembly 7 mainly consists of a locking device assembly 7.1, an inner clamp steel strip 7.2, a flange connecting block 7.3, and a pin 4. Each inner clamp steel strip 7.2 and a flange connecting block 7.3 are connected by the pin 4 to form a semi-ring inner clamp. The two semi-ring clamps are driven by the two locking device assemblies 7.1 to clamp and release. The inner clamp assembly 7 can be separated into two halves by removing the pin 4, thus ensuring that the locking device assembly 7.1 remains a single unit, enhancing the ease of assembly and disassembly.

[0071] like Figure 9The locking device assembly 7.1 mainly consists of a hydraulic motor 7.1.1, a worm gear reducer 7.1.2, a rotating shaft pressure block 1 7.1.3, a connecting housing 1 7.1.4, a transmission lead screw 7.1.5, a connecting housing 2 7.1.6, a disc spring 7.1.7, a rotating shaft pressure block 2 7.1.8, a disc spring pressure plate 7.1.9, a pressure sensor 7.1.10, an anti-rotation nut 7.1.11, an anti-rotation clamping plate 7.1.12, a reverse baffle 7.1.13, a limit nut 7.1.14, and a proximity switch 7.1.15.

[0072] The structure of the worm gear reducer 7.1.2 is as follows: Figure 11 As shown, it mainly consists of end cover 7.1.2.1, oil seal 7.1.2.2, lock nut 7.1.2.3, bearing 7.1.2.4, worm gear 7.1.2.5, key 7.1.2.6, transmission box 7.1.2.7, bearing 7.1.2.8, oil seal 7.1.2.9, end cover 7.1.2.10, bearing 7.1.2.11, and worm gear 7.1.2.12. The worm gear drives the turbine to rotate in place, achieving a 90° staggered reduction and torque increase transmission.

[0073] The worm gear reducer 7.1.2 is connected to the power output end of the hydraulic motor 7.1.1; the worm gear reducer 7.1.2 is installed on the connecting housing 7.1.4; one end of the transmission screw 7.1.5 is connected to the worm gear 7.1.2.5 by a key connection, and the other end passes through the connecting housing 7.1.4, the inner clamp steel belt of one half-ring clamp, the connecting flange block 7.3 connected to the other half-ring clamp, and the connecting housing 7.1.6 in sequence, and is then fixed by the anti-rotation nut 7.1.11 sleeved on the outside of the transmission screw 7.1.5.

[0074] The outer surface of the anti-rotation nut 7.1.11 is fitted with an anti-rotation clamping plate 7.1.12 to prevent it from rotating together with the transmission screw 7.1.5. For example... Figure 10 As shown, the anti-rotation nut 7.1.11 has two flat surfaces 7.1.16 on both its upper and lower parts. The anti-rotation clamping plate 7.1.12 has flat surfaces 7.1.16 that abut against the two flat surfaces of the anti-rotation nut 7.1.11. When the transmission screw 7.1.5 rotates, the two abutting flat surfaces 7.1.16 keep the transmission screw 7.1.5 in its original position, while the anti-rotation nut 7.1.11 drives the connecting housing 7.1.6 to move left and right on the transmission screw 7.1.5 through the anti-rotation clamping plate 7.1.12.

[0075] The anti-rotation clamping plate 7.1.12 is also connected to a reverse baffle 7.1.13. The anti-rotation nut 7.1.11 has a stepped surface at one end that abuts against the anti-rotation clamping plate 7.1.12. The reverse baffle 7.1.13 is located on the outside of the stepped surface. The reverse baffle 7.1.13 and the anti-rotation clamping plate 7.1.12 are fastened together by bolts.

[0076] A proximity switch 7.1.15 is installed on the reverse baffle 7.1.13. When the clamp is fully opened, the proximity switch 7.1.15 can send a signal to the control system.

[0077] When the lead screw 7.1.5 rotates under the drive of the worm gear 7.1.2.5, the anti-rotation plate 7.1.12 can prevent the anti-rotation nut 7.1.11 from rotating with the lead screw 7.1.5, so that while the lead screw 7.1.5 rotates in place, it drives the anti-rotation nut 7.1.11 to move horizontally on the lead screw 7.1.5.

[0078] The lead screw 7.1.5 and the anti-rotation nut 7.1.11 can have trapezoidal threads, enabling mechanical self-locking and giving the locking device self-locking performance. Furthermore, the hydraulic motor 7.1.1 can integrate a brake, ensuring that the locking force of the locking device is reliably maintained.

[0079] The worm gear 7.1.2.12 is driven to rotate by the hydraulic motor 7.1.1. The worm gear 7.1.2.12 drives the turbine 7.1.2.5, which in turn drives the transmission screw 7.1.5 to rotate in place.

[0080] like Figure 13 and Figure 14 As shown, one end of one of the inner clamp steel strips 7.2 is provided with a flange connecting lug. A through hole 7.2.1 is provided on the flange connecting lug. Semi-circular mounting blocks 7.2.2 are provided at the upper and lower parts of the through hole 7.2.1.

[0081] like Figure 8 and Figure 13 As shown, the end of another inner clamp steel strip 7.2 is connected to a connecting flange block 7.3 via a pin 4. The end of the flange connecting block 7.3 is also provided with a flange connecting lug. The flange connecting lug has a through hole 7.3.1. The upper and lower parts of the through hole 7.3.1 are provided with semi-circular mounting blocks 7.3.2.

[0082] like Figure 8 , Figure 9 , Figure 13As shown, the upper and lower surfaces of the connecting box 7.1.4 are both hinged to a double hinge shaft 7.1.4.1. The double hinge shaft 7.1.4.1 is fixed to the semi-circular mounting block 7.2.2 of the inner clamping steel belt 7.2 by a rotating shaft pressure block 7.1.3. The connecting box 7.1.4 rotates around the double hinge shaft 7.1.4.1.

[0083] The upper and lower surfaces of the connecting housing 7.1.6 are both hinged to a double hinge shaft 7.1.6.1. The double hinge shaft 7.1.6.1 is fixed to the semi-circular mounting block 7.3.2 of the flange connecting block 7.3 by a rotating shaft pressure block 7.1.8. The connecting housing 7.1.6 can rotate around the double hinge shaft 7.1.6.1.

[0084] Both sides of the locking device's connecting housing can rotate around the four pivots, which can adapt to the angle changes caused by the deformation of the flange steel strip when the clamp is tightened, making the clamp more reliable.

[0085] The transmission screw 7.1.5 passes through the through hole 7.2.1 of the inner clamp steel belt 7.2 and the through hole 7.3.1 of the flange connecting block 7.3, connecting the two devices together.

[0086] like Figure 9 and Figure 12 As shown, a pressure sensor 7.1.10 is also installed on the right side of the anti-rotation nut 7.1.11. The pressure sensor 7.1.10 is fixed on the disc spring pressure plate 7.1.9. A disc spring 7.1.7 is located on the right side of the disc spring pressure plate 7.1.9. When the anti-rotation nut 7.1.11 moves to the right, the pressure sensor 7.1.10 transmits the force to the disc spring 7.1.7, which then transmits the force to the connecting housing 7.1.6. The connecting housing 7.1.6 transmits the force to the flange connecting block 7.3 through the double hinge shaft 7.1.6.1, thereby realizing the clamping action. The pressure sensor enables accurate measurement of the clamping force, enhancing the reliability of the equipment, while the disc spring enables effective maintenance of the clamping force, enhancing the stability of the clamping force.

[0087] A limit nut 7.1.14 can be installed at the end of the transmission screw 7.1.5 to limit the outward movement of the anti-rotation nut 7.1.11 and prevent the anti-rotation nut 7.1.11 from coming off the transmission screw 7.1.5.

[0088] like Figure 15 , Figure 16 , Figure 17The diagram shows the working state of the locking device assembly. In the initial state, the spacing between the flange connecting lugs is S1, and the initial spacing between the anti-rotation nut 7.1.11 and the limit nut 7.1.14 is H1. When clamping, the drive screw 7.1.5 rotates in place, driving the anti-rotation nut 7.1.11 to move to the right, pressing the disc spring 7.1.7, reducing the flange connecting lug spacing to S2, and increasing the distance between the two nuts from H1 to H2. When releasing, the drive screw 7.1.5 rotates in the opposite direction in place, driving the anti-rotation nut 7.1.11 to move to the left, which, through the reverse baffle 7.1.13, drives the connecting housing 7.1.6 to move to the left, increasing the flange connecting lug spacing to S3, while reducing the nut spacing to H3.

[0089] This screw and nut locking method achieves active locking, and the locking force will not change due to slight changes in the diameter of the pier. The locking force can be precisely controlled, and the opening gap is also relatively large, which can prevent the inner clamp from scratching the pier during the crawling process.

[0090] Example 2

[0091] As another implementation method, such as Figure 18 As shown, unlike Embodiment 1, the locking device assembly does not have a pressure sensor 7.1.10. The right side of the anti-rotation nut 7.1.11 is directly pressed against the disc spring 7.1.7 by the disc spring pressure plate 7.1.9, and then pressed against the connecting housing 7.1.6 by the disc spring.

[0092] In other embodiments, the inner clamp assembly of this utility model can be driven by two sets of locking device assemblies as described in Embodiment 1. Both sets can integrate pressure sensors, or only one pressure sensor can be integrated to reduce costs.

[0093] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. It should be noted that any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An adjustable active clamping crawler, comprising an upper clamp, a lower clamp, and a lifting cylinder connected between the upper clamp and the lower clamp, wherein the lifting cylinder is used to drive the upper clamp and the lower clamp to perform alternating stepping crawling; characterized in that: Both the upper and lower clamps are composed of two semi-ring assemblies connected by pins and fastening bolts; both the upper and lower clamps include an outer clamp assembly and an inner clamp assembly embedded inside the outer clamp assembly; the outer clamp assembly is provided with an adjustable device to accommodate piers of different diameters.

2. The adjustable active clamping crawler according to claim 1, characterized in that: The external clamp assembly is equipped with adjustable devices in the horizontal, vertical and diagonal directions to accommodate the size of piers with different diameters.

3. The adjustable active clamping crawler according to claim 2, characterized in that: The external clamp assembly includes two opposing transverse main frames, longitudinal connecting frames connected to the four corners of the inner walls of the two transverse main frames, and frame adjustment blocks connected between the two longitudinal connecting frames in the longitudinal direction. The inner walls of the transverse main frames have multiple adjustable mounting holes, and the longitudinal connecting frames are adjustablely mounted on different holes in the transverse main frames in the transverse direction. The number of frame adjustment blocks in the longitudinal direction is adjustable, and can be set to one or more. The inner walls of the four longitudinal connecting frames are each equipped with elastic guide wheels for pressing against the bridge piers, and the elastic guide wheels are all located at a 45° angle position inside the external clamp assembly.

4. The adjustable active clamping crawler according to claim 3, characterized in that: The elastic guide wheel is also equipped with a guide wheel adjustment block to adapt to piers of different diameters. The number of guide wheel adjustment blocks is adjusted according to the diameter of the bridge pier.

5. An adjustable active clamping crawler according to claim 1, characterized in that: The inner clamp assembly includes an inner clamp steel strip, a flange connecting block, and a locking device assembly. One end of the inner clamp steel strip and the flange connecting block are connected by a pin to form a semi-circular clamp. The locking device assembly is inserted between the two semi-circular clamps to drive the two semi-circular clamps to clamp and release the inner clamp steel strip.

6. An adjustable active clamping crawler according to claim 5, characterized in that: The locking device assembly includes a hydraulic motor, a worm gear reducer, a transmission screw, a first connecting housing, and a second connecting housing. The worm gear reducer is connected to the power output end of the hydraulic motor. The worm gear reducer is mounted on the first connecting housing. One end of the transmission screw is connected to the worm gear via a key connection, and the other end passes sequentially through the first connecting housing, the inner clamping steel strip of one half-ring clamp, the connecting flange block connected to the other half-ring clamp, and the second connecting housing, and is then fixed by an anti-rotation nut.

7. An adjustable active clamping crawler according to claim 6, characterized in that: The outer surface of the anti-rotation nut is fitted with an anti-rotation plate to prevent it from rotating together with the transmission screw. The anti-rotation plate is fixed to the second connecting housing. A reverse baffle is also connected to the outside of the anti-rotation plate. The reverse baffle and the anti-rotation plate are fastened together by bolts.

8. An adjustable active clamping crawler according to claim 7, characterized in that: Flange connecting lugs are provided on the connecting flange block connected to one end of the inner clamp steel strip and on the other end of the inner clamp steel strip. Two semi-circular mounting blocks are provided on the upper and lower parts of the two flange connecting lugs. The upper and lower surfaces of the connecting box one and the connecting box two are connected by hinge shafts in a hinged manner. The four hinge shafts are respectively fixed on the four semi-circular mounting blocks by four rotating shaft pressure blocks. Both the connecting box one and the connecting box two can rotate around the corresponding double hinge shafts.

9. An adjustable active clamping crawler according to claim 8, characterized in that: Inside the second connecting box, from the inside out, there are a disc spring, a disc spring pressure plate, and a pressure sensor. One side of the pressure sensor abuts against the anti-rotation nut, and the other side is fixed to the disc spring pressure plate.

10. An adjustable active clamping crawler according to claim 9, characterized in that: The end of the transmission screw is also provided with a limiting nut to prevent the anti-rotation nut from coming off the transmission screw.

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