Adjustable walking device for tunnel track-laying portal crane

Abstract

The present application relates to railway laying equipment technical field, specifically for the adjustable walking device for tunnel track laying portal crane, including fixed frame, symmetrical fixed installation frame on both sides of fixed frame and hydraulic telescopic cylinder through fixed in the middle position of fixed frame, when using in the track laying in the circular tunnel, with the help of auxiliary wheel down and touch tunnel ground, and with both sides drive wheel linkage rotation, can realize stable contact with the arc surface of the circular tunnel, thus completely get rid of the dependence on pre-laid track, save the complex process of track erection, without the need for expansion bolt fixed track in the pipe piece inner wall, naturally avoid the matching pipe piece arc, avoid the construction difficulties brought by steel bar layer, effectively reduce the construction complexity, at the same time, the adjusting assembly can freely adjust the drive wheel orientation to adapt to the arc inner wall, so that it can flexibly adapt to the curved surface structure of different circular tunnels, significantly improve the operation adaptability of the equipment in special space, the stable contact of three supporting points guarantees the operation stability.

Description

Technical Field

[0001] This invention relates to the field of railway laying equipment technology, specifically to an adjustable traveling device for tunnel track laying gantry cranes. Background Technology

[0002] In the construction of modern urban rail transit, tunnel track laying is a crucial step. As an important piece of construction equipment, the performance of the tunnel track-laying gantry crane directly affects construction efficiency, quality, and safety. Early on, traditional tunnel track laying relied heavily on manual, piecemeal laying. During underground line construction, large quantities of materials had to be manually transported into the tunnel, resulting in significant material loss during transport, difficulty in ensuring construction quality, and extremely slow progress. With technological advancements, equipment such as gantry cranes have begun to be used for track hoisting and laying.

[0003] However, traditional gantry cranes generally use a wheel-rail traveling mechanism, which relies on pre-laid tracks for operation. In rectangular tunnels, this design can achieve efficient operation through lateral telescopic beams and vertical lifting beams. However, in circular tunnels (such as shield tunnels and water conservancy pipelines), due to the spatial structure, the traditional traveling device exposes significant defects. The track installation is complex and the scope of application is limited. The inner wall of a circular tunnel is curved, and traditional gantry cranes need to install vertical tracks (such as I-beams) inside the tube to support the traveling wheels. These tracks need to be fixed to the inner wall of the tunnel segment with expansion bolts. During installation, it is necessary not only to accurately match the curvature of the tunnel segment, but also to avoid the steel reinforcement layer. The construction is difficult, resulting in a longer construction period. Overall, it cannot adapt to the adjustment needs of different tunnel structures. Summary of the Invention

[0004] The purpose of this invention is to provide an adjustable traveling device for tunnel track-laying gantry cranes, in order to solve the problems mentioned in the background art, which require the installation of vertical tracks (such as I-beam rails) inside the tunnel to support the travel wheels. These tracks need to be fixed to the inner wall of the tunnel segment with expansion bolts. During installation, not only must the curvature of the tunnel segment be precisely matched, but the steel reinforcement layer must also be avoided. This makes construction difficult, leads to a longer construction period, and the overall device cannot adapt to the adjustment needs of different tunnel structures.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an adjustable traveling device for a tunnel track-laying gantry crane, comprising a fixed frame, mounting frames symmetrically fixed on both sides of the fixed frame, and a hydraulic telescopic cylinder that penetrates and is fixed in the middle of the interior of the fixed frame. A contact frame is fixedly installed at the bottom output end of the hydraulic telescopic cylinder, and mounting seats are fixedly installed at both ends of the contact frame. Adjustment components are provided on the exterior of each mounting seat near the corresponding side of the mounting frame. Drive wheels are provided at the bottom ends of both ends of the mounting frame, and friction telescopic components are provided on one side of each drive wheel. Triggering components are provided at the top ends of both ends of the mounting frame. The adjustment components include two sets of connecting frames and two fixing blocks. The two sets of connecting frames are symmetrically and obliquely arranged on the exterior of both sides of the mounting seat, with two connecting frames in each set. The two fixing blocks are symmetrically arranged on the exterior of both ends of the mounting frame.

[0006] Furthermore, the mounting bracket and the mounting frame are mounted in an I-shape from above. Each mounting base has a support frame fixedly mounted at its bottom end. Each support frame has an auxiliary wheel rotatably mounted at its bottom end. Each mounting base has several auxiliary rods fixedly mounted at its top end. The top ends of each auxiliary rod are slidably mounted through the top of the mounting frame.

[0007] Furthermore, each of the connecting brackets has a limiting groove through the interior on the side near the mounting base. A fixed shaft is fixedly installed on the exterior of the mounting base on the side near the limiting groove. A limiting bearing is rotatably engaged on the exterior of the fixed shaft on the side near the limiting groove. The limiting bearing and the limiting groove are connected through a sliding connection.

[0008] Furthermore, a rotating shaft is fixedly installed through the exterior of the mounting bracket on the side closest to each fixed block, and a rotating shaft is rotatably installed through the exterior of the corresponding side of each set of connecting brackets on the side away from the fixed shaft. One side of the fixed block is fixedly connected to the exterior of a set of connecting brackets on the corresponding side.

[0009] Furthermore, an installation block is fixedly installed at the bottom end of the fixing block, an auxiliary frame is fixedly installed at the bottom end of the installation block, a drive motor is fixedly installed on one side of the bottom end of the auxiliary frame, and a drive wheel is fixedly installed at the output end of the drive motor.

[0010] Furthermore, the triggering component includes two guide frames and a first arc block. The two guide frames are symmetrically fixedly installed on one side of the top of the mounting frame, and the first arc block is fixedly installed between the two guide frames. Both guide frames are semi-circular, and the center of the two guide frames and the center of the corresponding side rotation axis are on the same center line.

[0011] Furthermore, both guide frames have arc-shaped guide grooves extending through their interiors on the side closest to the fixing block. A positioning block is fixedly installed on one side of the top of the fixing block, and a positioning rod is horizontally fixedly installed on the top of the positioning block. Both ends of the positioning rod are slidably installed through the guide grooves on the corresponding sides, and a second arc block is fixedly installed on the top of the positioning rod.

[0012] Furthermore, an arc cavity is embedded inside the first arc block on the side near the second arc block, and an arc-shaped piston block is fixedly installed on the outside of the second arc block on the side near the opening end of the arc cavity. The arc-shaped piston block is slidably and sealingly installed inside one side of the arc cavity, and a tension tube is fixedly installed through the bottom end of the arc cavity.

[0013] Furthermore, the friction telescopic assembly includes a limiting plate and a liquid storage chamber. The limiting plate is fixedly installed on the outside of the drive wheel near the mounting base. The liquid storage chamber is opened in the middle of the inside of the limiting plate. A rotating sealing seat is rotatably installed through the middle of the outside of one side of the limiting plate. The output end of the stretching tube is fixedly installed through the inside of one side of the rotating sealing seat.

[0014] Furthermore, the edge of the limiting plate has several through holes that are equally angularly pierced through it. A stop block is fixedly installed inside one side of each through hole. A telescopic column is slidably installed inside the stop block. A friction head is fixedly installed on the outside of the end of the telescopic column away from the liquid storage cavity. A limiting piston block is fixedly installed on the end of the telescopic column away from the friction head. The limiting piston block and the through hole are connected by a sliding seal. A return spring is sleeved through the outside of the telescopic column. The two ends of the return spring are fixedly installed on one side of the stop block and the limiting piston block, respectively.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This adjustable travel device for track-laying gantry crane solves the inherent problems of traditional wheel-rail gantry cranes operating in circular tunnels by adjusting the components. When laying tracks inside a circular tunnel, the auxiliary wheels descend to contact the tunnel floor and rotate in conjunction with the drive wheels on both sides, achieving stable contact with the curved surface of the circular tunnel. This completely eliminates the dependence on pre-laid tracks, saves the complex process of track erection, and eliminates the need to fix the tracks to the inner wall of the tunnel segments with expansion bolts. This naturally avoids the construction difficulties caused by matching the curvature of the tunnel segments and avoiding the steel reinforcement layer, effectively reducing construction complexity. At the same time, the adjustment components can freely adjust the orientation of the drive wheels to adapt to the curved inner wall, making it flexible to adapt to the curved surface structure of different circular tunnels. This significantly improves the adaptability of the equipment in special spaces. The stable contact of the three support points not only ensures the stability of the operation but also saves the construction period associated with track installation. Overall, this achieves high efficiency and flexibility in gantry crane operations inside circular tunnels.

[0017] 2. When the adjustment component is running, it can synchronously drive the trigger component and the friction telescopic component to work together, causing the telescopic column on one side of the bottom edge of the drive wheel to extend the friction head and fit tightly against the inner wall of the circular tunnel. This significantly enhances the friction between the drive wheels and the curved inner wall during rotation and movement, which not only avoids slippage that may occur when working on curved surfaces, but also maintains a stable posture when carrying heavy objects or performing precise operations, further improving the overall safety and accuracy of the operation. When the adjustment component resets, it will trigger the trigger component and the friction telescopic component to reset synchronously, causing the friction head to retract automatically. This design not only prevents unnecessary friction and wear between the friction head and the ground when the equipment moves on a flat surface, reducing component wear, but also reduces the maintenance frequency caused by friction head damage. This extends the service life of the device while ensuring the switching efficiency of the equipment in different operating scenarios. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the contact frame of the hydraulic telescopic cylinder of the present invention;

[0020] Figure 3 for Figure 1 Enlarged structural diagram at point A in the middle;

[0021] Figure 4 This is a three-dimensional structural diagram of the fixing block and the mounting block of the present invention;

[0022] Figure 5 This is a schematic diagram demonstrating how the hydraulic telescopic cylinder of the present invention drives the mounting base to descend.

[0023] Figure 6 This is a top view of the fixing frame and mounting frame of the present invention;

[0024] Figure 7 This is a three-dimensional structural diagram of the connecting frame and rotating shaft of the present invention;

[0025] Figure 8 for Figure 7 Enlarged structural diagram at point B;

[0026] Figure 9 This is a partial cross-sectional three-dimensional structural schematic diagram of the limiting disk of the present invention;

[0027] Figure 10 for Figure 9 Enlarged structural diagram at point C;

[0028] Figure 11 This is a schematic diagram demonstrating how the fixed block drives the drive wheel to rotate, as per the present invention.

[0029] The components represented by each number in the attached diagram are listed below: 1. Fixed frame; 2. Mounting frame; 3. Hydraulic telescopic cylinder; 4. Contact frame; 5. Mounting base; 6. Support frame; 7. Auxiliary wheel; 8. Auxiliary rod; 9. Connecting frame; 10. Limiting slide groove; 11. Fixed shaft; 12. Limiting bearing; 13. Rotating shaft; 14. Fixed block; 15. Mounting block; 16. Auxiliary frame; 17. Drive motor; 18. Drive wheel; 19. Guide frame; 20. First arc block; 21. Guide groove; 22. Positioning block; 23. Positioning rod; 24. Arc cavity; 25. Second arc block; 26. Arc-shaped piston block; 27. Tension tube; 28. Limiting disc; 29. ​​Rotating sealing seat; 30. Liquid storage chamber; 31. Through hole; 32. Stop block; 33. Telescopic column; 34. Limiting piston block; 35. Friction head; 36. Return spring. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1: Please refer to Figure 1 - Figure 6 The adjustable traveling device for tunnel track laying gantry crane includes a fixed frame 1, mounting frames 2 symmetrically fixed on both sides of the fixed frame 1, and a hydraulic telescopic cylinder 3 that penetrates and is fixed in the middle of the interior of the fixed frame 1. A contact frame 4 is fixedly installed at the bottom output end of the hydraulic telescopic cylinder 3. Mounting seats 5 are fixedly installed at both ends of the contact frame 4. Adjustment components are provided on the outside of the mounting seats 5 near the corresponding side of the mounting frame 2. Drive wheels 18 are provided at the bottom of both ends of the mounting frame 2. The adjustment components include two sets of connecting frames 9 and two fixing blocks 14. The two sets of connecting frames 9 are symmetrically inclined and arranged on both sides of the mounting seat 5. Each set of connecting frames 9 consists of two units. The two fixing blocks 14 are symmetrically arranged on the outside of both ends of the mounting frame 2.

[0032] The mounting bracket 1 and the mounting bracket 2 are mounted in an I-shape from above. The bottom of the mounting base 5 is fixedly mounted with a support frame 6. The bottom of the support frame 6 is rotatably mounted with an auxiliary wheel 7. The top of the mounting base 5 is fixedly mounted with several auxiliary rods 8. The top of the auxiliary rods 8 are all slidably mounted on the outside of the top of the mounting bracket 2.

[0033] Specifically, the design, viewed from above, is an I-shaped structure installed via the fixing bracket 1 and the mounting bracket 2 (e.g., Figure 6 As shown in the figure, this device allows the track to be lifted or lowered from the gap between the two mounting frames 2 during track hoisting and laying.

[0034] Each connecting bracket 9 has a limiting groove 10 through the inside of the side near the mounting base 5. A fixed shaft 11 is fixedly installed on the outside of the side of the mounting base 5 near the limiting groove 10. A limiting bearing 12 is rotatably engaged on the outside of the fixed shaft 11 near the limiting groove 10. The limiting bearing 12 and the limiting groove 10 are connected through sliding.

[0035] The mounting bracket 2 has a rotating shaft 13 fixedly installed through the outside of the side closest to each fixing block 14. The side of each connecting bracket 9 away from the fixing shaft 11 is rotatably installed through the rotating shaft 13 on the corresponding side. One side of the fixing block 14 is fixedly connected to the outside of the corresponding connecting bracket 9.

[0036] A mounting block 15 is fixedly installed at the bottom of the fixing block 14, an auxiliary frame 16 is fixedly installed at the bottom of the mounting block 15, a drive motor 17 is fixedly installed on one side of the bottom of the auxiliary frame 16, and a drive wheel 18 is fixedly installed at the output end of the drive motor 17.

[0037] In this embodiment, when using this walking device, the existing gantry crane mechanism is first fixed to the top of the mounting frames 2 on both sides to form a complete track laying device. When laying the track in the circular tunnel, the hydraulic telescopic cylinder 3 inside the control frame 1 extends, and its output end drives the bottom contact frame 4 to extend synchronously. When the contact frame 4 extends, it drives the mounting seats 5 fixed at the bottom on both sides to extend synchronously, thereby driving the support frame 6 and auxiliary wheel 7 at the bottom of the mounting seat 5 to extend and contact the ground, so that the entire device is lifted by force. Simultaneously, through the through-sliding connection between the fixed shafts 11 on both sides and the limiting slide grooves 10 inside the connecting frame 9, the mounting base 5 lowers, causing one end of the connecting frame 9 to rotate and lower. Combined with the through-rotation positioning of the connecting frame 9 by the rotating shaft 13, and the fixed installation of the fixing block 14 to one end of the connecting frame 9, when one end of the connecting frame 9 rotates and lowers, it causes the fixing block 14 to rotate around the rotating shaft 13, thereby causing the mounting block 15, auxiliary frame 16, drive motor 17, and drive wheel 18 at the bottom to rotate synchronously at a certain angle, achieving stable contact between the drive wheels 18 on both sides and the curved surface of the circular tunnel. This process completely eliminates the reliance on pre-laid tracks, saving the track erection process; it eliminates the need to fix the track to the inner wall of the tunnel segment with expansion bolts, avoiding the construction difficulties of matching the tunnel segment curvature and avoiding the reinforcement layer, thus reducing construction complexity. Meanwhile, by adjusting the extension length of the hydraulic telescopic cylinder 3, the orientation of the drive wheel 18 can be changed to adapt to different circular tunnel curved surfaces and improve the adaptability of special space operations; the two drive wheels 18 on both sides are in contact with the inner wall of the tunnel and the bottom auxiliary wheel 7 is in contact with the tunnel ground to form three support points, ensuring operational stability, saving track installation time, and realizing efficient and flexible gantry crane operations in circular tunnels.

[0038] It should also be noted that when the entire device needs to be reset during operation inside a level tunnel, the hydraulic telescopic cylinder 3 inside the fixed frame 1 is retracted first. When its output end retracts, it will drive the bottom contact frame 4 to retract synchronously. When the contact frame 4 retracts, it will drive the mounting seats 5 at both bottom ends to retract synchronously, causing the entire device to reset and fall. At the same time, with the through sliding connection between the fixed shafts 11 on both sides and the limiting slide grooves 10 inside the connecting frame 9, the mounting seat 5 will drive one end of the connecting frame 9 to rotate and rise when it rises. With the through rotation positioning of the connecting frame 9 by the rotating shaft 13 and the fixed installation of the fixed block 14 to one end of the connecting frame 9, when one end of the connecting frame 9 rotates and rises, it will drive the fixed block 14 to rotate in the opposite direction around the rotating shaft 13. When the fixed block 14 rotates, it will drive the bottom mounting block 15, auxiliary frame 16, drive motor 17 and drive wheel 18 to rotate in the opposite direction synchronously and reset, so that the drive wheels 18 on both sides return to the state adapted to the level ground. At this time, the device no longer relies on the arc surface support, and through the stable contact between the bottom and the level ground, it can adapt to the operation requirements inside the level tunnel.

[0039] Example 2: Please refer to Figure 7 - Figure 11 This embodiment further illustrates Example 1: a friction telescopic component is provided on one side of the drive wheel 18, and a trigger component is provided at the top of the edges of both ends of the mounting bracket 2.

[0040] The triggering component includes two guide frames 19 and a first arc block 20. The two guide frames 19 are symmetrically fixedly installed on one side of the top of the mounting frame 2, and the first arc block 20 is fixedly installed between the two guide frames 19. Both guide frames 19 are semi-circular, and the center of the two guide frames 19 and the center of the corresponding side rotation shaft 13 are on the same center line.

[0041] Both guide frames 19 have arc-shaped guide grooves 21 running through their interiors on the side closest to the fixed block 14. A positioning block 22 is fixedly installed on one side of the top of the fixed block 14. A positioning rod 23 is horizontally fixedly installed on the top of the positioning block 22. Both ends of the positioning rod 23 are slidably installed inside the guide grooves 21 on the corresponding sides. A second arc block 25 is fixedly installed on the top of the positioning rod 23.

[0042] An arc cavity 24 is embedded inside the first arc block 20 near the side of the second arc block 25. An arc-shaped piston block 26 is fixedly installed on the outside of the side of the second arc block 25 near the opening end of the arc cavity 24. The arc-shaped piston block 26 is slidably sealed inside the side of the arc cavity 24. A tension tube 27 is fixedly installed through the bottom end of the arc cavity 24.

[0043] Specifically, by using two semi-circular guide frames 19 and a through-sliding connection between the arc-shaped guide groove 21 and the positioning rod 23, the positioning rod 23 can slide stably along the arc-shaped guide groove 21 during the rotation of the fixed block 14 around the rotating shaft 13 to adjust the orientation of the drive wheel 18, providing precise guidance for the rotation of the fixed block 14. Since the center of the guide frame 19 and the center of the rotating shaft 13 are on the same center line, it can be ensured that the rotation trajectory of the fixed block 14 is completely matched with the preset arc path, avoiding deviation or jamming during rotation, ensuring the adjustment accuracy of the adjustment component for the orientation of the drive wheel 18, and enabling it to accurately adapt to the arc-shaped inner wall of different circular tunnels.

[0044] Simultaneously, this structure can synchronously constrain the movement trajectory of the second arc block 25 and the arc-shaped piston block 26, ensuring that they always maintain a stable sliding seal state within the arc cavity 24, thus preventing hydraulic oil leakage or trigger component failure due to the rotational displacement of the fixed block 14. This design not only ensures the linkage consistency between the trigger component and the adjustment component, allowing the friction telescopic component to extend or retract the friction head 35 synchronously with the drive wheel 18 towards the adjustment, but also disperses the contact stress between the positioning rod 23 and the guide groove 21 through the arc-shaped guide structure, reducing component wear, extending the service life of the trigger component, and further improving the overall stability and reliability of the device.

[0045] The friction telescopic assembly includes a limiting disk 28 and a liquid storage chamber 30. The limiting disk 28 is fixedly installed on the outside of the drive wheel 18 near the mounting base 5. The liquid storage chamber 30 is opened in the middle of the inside of the limiting disk 28. A rotating sealing seat 29 is rotatably installed through the middle of the outside of one side of the limiting disk 28. The output end of the stretching tube 27 is fixedly installed through the inside of one side of the rotating sealing seat 29.

[0046] Several through holes 31 are equally angled through the edge of the limiting plate 28. A stop block 32 is fixedly installed inside one side of each through hole 31. A telescopic column 33 is slidably installed inside the stop block 32. A friction head 35 is fixedly installed on the outside of the end of the telescopic column 33 away from the liquid storage chamber 30. A limiting piston block 34 is fixedly installed on the end of the telescopic column 33 away from the friction head 35. The limiting piston block 34 and the through hole 31 are slidably sealed. A return spring 36 is sleeved through the outside of the telescopic column 33. The two ends of the return spring 36 are fixedly installed on one side of the stop block 32 and the limiting piston block 34, respectively.

[0047] In this embodiment, when the device lays the track in the circular tunnel, the connecting frame 9 first rotates and descends, driving the fixed block 14 to rotate synchronously around the rotating shaft 13, which in turn pulls the mounting block 15, auxiliary frame 16, drive motor 17 and drive wheel 18 at the bottom to rotate together at a certain angle, so that the drive wheels 18 on both sides are in stable contact with the arc surface of the circular tunnel. During this process, when the fixed block 14 rotates, it drives the positioning rod 23 fixed by the top positioning block 22 to rotate synchronously in the arc-shaped guide groove 21. The rotation of the positioning rod 23 will drive the second arc block 25 and the arc-shaped piston block 26 to rotate and squeeze in the arc cavity 24 of the first arc block 20. This action will squeeze the hydraulic oil pre-injected in the arc cavity 24, the tension tube 27 and the liquid storage cavity 30. The squeezed hydraulic oil flows into the interior of several through holes 31 of the limiting plate 28, thereby pushing the limiting piston block 34 in the through hole 31 to move. When the limiting piston block 34 moves, it drives the telescopic column 33 and the friction head 35 to extend synchronously, so that multiple friction heads 35 on the side of the limiting plate 28 extend together and contact the arc-shaped inner wall of the circular tunnel. This linkage process significantly enhances the friction between the two drive wheels 18 and the arc-shaped inner wall when they rotate and move. It can avoid the risk of slippage when working on curved surfaces and maintain a stable posture when carrying heavy objects or performing precise operations, further improving the safety and accuracy of the overall operation.

[0048] It should also be noted that when the device needs to be reset, the connecting frame 9 first rotates and rises, causing the fixed block 14 to rotate synchronously in the opposite direction around the rotating shaft 13, which in turn pulls the mounting block 15, auxiliary frame 16, drive motor 17 and drive wheel 18 at the bottom to rotate in the opposite direction and reset together. During this process, when the fixed block 14 rotates in the opposite direction, it will cause the positioning rod 23 fixed by the top positioning block 22 to rotate synchronously in the opposite direction in the arc-shaped guide groove 21; the reverse rotation of the positioning rod 23 will also cause the second arc block 25 and the arc-shaped piston block 26 to rotate in the opposite direction in the arc cavity 24 of the first arc block 20, so that the internal space of the arc cavity 24 increases. At this time, a negative pressure is formed in the arc cavity 24, the tension tube 27 and the liquid storage chamber 30. The hydraulic oil that originally flowed into the through hole 31 of the limiting plate 28 will flow back into the arc cavity 24, and the limiting piston block 34 in the through hole 31 will lose its position. The resistance of the hydraulic oil moves with the return direction of the hydraulic oil, thereby driving the telescopic column 33 and the friction head 35 to retract synchronously. This causes the multiple friction heads 35 on the side of the limit plate 28 to disengage from the arc-shaped inner wall of the circular tunnel, completing the reset and allowing the friction heads 35 to retract automatically. This design not only prevents unnecessary contact and wear between the friction heads 35 and the ground when the equipment moves on a plane, reducing component wear, but also reduces the maintenance frequency caused by damage to the friction heads 35. While extending the service life of the device, it also ensures the switching efficiency of the equipment in different operating scenarios.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable traveling device for a tunnel track-laying gantry crane, comprising a fixed frame (1), mounting frames (2) symmetrically fixed on both sides of the fixed frame (1), and a hydraulic telescopic cylinder (3) penetrating and fixed in the middle of the interior of the fixed frame (1), characterized in that: The bottom output end of the hydraulic telescopic cylinder (3) is fixedly installed with a contact frame (4), and both ends of the contact frame (4) are fixedly installed with mounting seats (5). The mounting seats (5) are provided with adjustment components near the corresponding side mounting frame (2). Both ends of the mounting frame (2) are provided with drive wheels (18) at the bottom. One side of the drive wheels (18) is provided with a friction telescopic component. Both ends of the mounting frame (2) are provided with trigger components at the top. The adjustment assembly includes two sets of connecting frames (9) and two fixing blocks (14). The two sets of connecting frames (9) are symmetrically and obliquely arranged on both sides of the mounting base (5). Each set of connecting frames (9) consists of two units. The two fixing blocks (14) are symmetrically arranged on the outer sides of the two ends of the mounting frame (2). Each mounting base (5) has a support frame (6) fixedly installed at its bottom end. An auxiliary wheel (7) is rotatably installed at the bottom end of the support frame (6). Each connecting frame (9) has a limit groove (10) through it on the side near the mounting base (5). A fixed shaft (11) is fixedly installed on the side of the mounting base (5) near the limit groove (10). A limit bearing (12) is rotatably engaged on the side of the fixed shaft (11) near the limit groove (10). The limit bearing (12) and the limit groove (10) are connected by a through sliding connection. The mounting bracket (2) has a rotating shaft (13) fixedly installed through the outside of the side of each fixed block (14). The connecting bracket (9) of each group has a rotating shaft (13) fixedly installed through the outside of the corresponding side of the side away from the fixed shaft (11). One side of the fixed block (14) is fixedly connected to the outside of a group of connecting brackets (9) on the corresponding side. The triggering component includes two guide frames (19) and a first arc block (20). The two guide frames (19) are symmetrically fixedly installed on one side of the top of the mounting frame (2). The first arc block (20) is fixedly installed between the two guide frames (19). The two guide frames (19) are both semi-circular. The center of the two guide frames (19) and the center of the corresponding side rotation axis (13) are on the same center line. Both guide frames (19) have arc-shaped guide grooves (21) through the inside of the side of the fixed block (14). A positioning block (22) is fixedly installed on one side of the top of the fixed block (14). A positioning rod (23) is fixedly installed horizontally on the top of the positioning block (22). The two ends of the positioning rod (23) are slidably installed inside the guide groove (21) on the corresponding side. A second arc block (25) is fixedly installed on the top of the positioning rod (23).

2. The adjustable traveling device for tunnel track-laying gantry cranes according to claim 1, characterized in that: The fixed frame (1) and the mounting frame (2) are mounted in an I-shape from above. Several auxiliary rods (8) are fixedly installed on the top of the mounting base (5). The top of each auxiliary rod (8) is slidably installed through the top of the mounting frame (2).

3. The adjustable traveling device for tunnel track-laying gantry cranes according to claim 1, characterized in that: The bottom end of the fixed block (14) is fixedly installed with an installation block (15), the bottom end of the installation block (15) is fixedly installed with an auxiliary frame (16), the bottom side of the auxiliary frame (16) is fixedly installed with a drive motor (17), and the output end of the drive motor (17) is fixedly installed with a drive wheel (18).

4. The adjustable traveling device for tunnel track-laying gantry cranes according to claim 1, characterized in that: An arc cavity (24) is embedded inside the first arc block (20) near the side of the second arc block (25). An arc-shaped piston block (26) is fixedly installed on the outside of the side of the second arc block (25) near the opening end of the arc cavity (24). The arc-shaped piston block (26) is slidably and sealed inside the side of the arc cavity (24). A tension tube (27) is fixedly installed through the bottom end of the arc cavity (24).

5. The adjustable traveling device for tunnel track-laying gantry cranes according to claim 4, characterized in that: The friction telescopic assembly includes a limiting disk (28) and a liquid storage chamber (30). The limiting disk (28) is fixedly installed on the outside of the drive wheel (18) near the mounting base (5). The liquid storage chamber (30) is opened in the middle of the inside of the limiting disk (28). A rotating sealing seat (29) is rotatably installed through the middle of the outside of one side of the limiting disk (28). The output end of the stretching tube (27) is fixedly installed through the inside of one side of the rotating sealing seat (29).

6. The adjustable traveling device for tunnel track-laying gantry cranes according to claim 5, characterized in that: The limiting plate (28) has several through holes (31) that are equally angularly pierced through its interior. A stop block (32) is fixedly installed inside one side of each through hole (31). A telescopic column (33) is slidably installed inside the stop block (32). A friction head (35) is fixedly installed on the outside of the end of the telescopic column (33) away from the liquid storage chamber (30). A limiting piston block (34) is fixedly installed on the end of the telescopic column (33) away from the friction head (35). The limiting piston block (34) and the through hole (31) are connected by a sliding seal. A return spring (36) is sleeved through the outside of the telescopic column (33). The two ends of the return spring (36) are fixedly installed on one side of the stop block (32) and the limiting piston block (34), respectively.

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