A tunnel lining trolley self-laying track walking device

Abstract

The application provides a tunnel lining trolley self-track-laying walking device, at least one of which is arranged on a trolley portal. The device comprises a guide seat, a lifting assembly, a walking assembly, a track clamping piece, a track and an adjustable support assembly. The driving end of the lifting assembly penetrates the guide seat and is connected with the walking assembly. Two track clamping pieces are oppositely arranged at the bottom of the walking assembly, and the track is clamped therebetween. The track is in rolling connection with the clamping pieces and the walking wheels. Two adjustable support assemblies are oppositely arranged at the bottom of the guide seat, which are used for adjusting the support height of the corresponding side of the trolley portal and supporting when the track is separated from the base surface. When walking, the track is grounded, the adjustable support assemblies are separated, and the walking wheels roll and move forward. When laying the track, the adjustable support assemblies support the base surface, the track is lifted, and the walking wheels reversely rub and lay the track. The device does not need a traction motor or manual adjustment, simplifies the operation and reduces the labor intensity. The two adjustable support assemblies can independently adjust the height, adapt to the uneven or slope base surface, avoid the inclination and deviation of the trolley, and ensure the lining precision and safety.

Description

Technical Field

[0001] This application generally relates to the field of tunnel construction technology, and specifically to a self-tracking walking device for a tunnel lining trolley. Background Technology

[0002] Tunnel lining refers to the permanent support structure built around the perimeter of an underground cavern after excavation to prevent deformation or collapse of the surrounding rock. A tunnel lining trolley is a formwork installation used in secondary tunnel lining construction. It moves along tracks laid at the bottom of the tunnel to move, position, and demold the entire formwork, thus completing the concrete pouring operation for the tunnel's inner wall. Traditionally, after completing a section of lining, the trolley requires manual removal of the rear track and re-laying, resulting in high labor intensity and low efficiency. Therefore, some existing solutions attempt to integrate a self-laying track mechanism onto the trolley.

[0003] However, existing self-tracking mechanisms still have the following problems: when the ground is uneven or has a slope, the stability of the trolley is poor; and the transport track needs to be pulled by traction motors, steel cables, etc., and the track trolleys need to be manually adjusted, which is complicated to operate and the labor intensity is still high. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a tunnel lining trolley self-tracking travel device that can solve the above-mentioned technical problems.

[0005] This application provides a self-tracking travel device for a tunnel lining trolley, which is mounted on the trolley gantry and at least one in number. The self-tracking travel device includes: A guide seat is located at the bottom of the trolley gantry; A lifting assembly is disposed inside the trolley gantry, and the drive end of the lifting assembly passes through the guide seat and is connected to a traveling assembly; the traveling assembly includes at least traveling wheels; A drive assembly is disposed on the walking assembly, and the drive assembly is connected to the walking wheel via a transmission to drive the walking wheel to rotate; Two track clamping members are rotatably disposed at the bottom of the walking assembly along a second direction. A track extending along a first direction is provided between the two track clamping members. The two track clamping members clamp the track along the second direction, and the track is rotatably connected to the track clamping members. The track is rotatably connected to the walking wheel. The first direction is perpendicular to the second direction. Two adjustable support components are disposed opposite each other at the bottom of the guide seat and on both sides of the track along the second direction; the adjustable support components are used to adjust the support height of the corresponding side of the trolley gantry; The lifting assembly has an extended state and a retracted state. When the lifting assembly is in the extended state, the track contacts the base surface, the adjustable support assembly disengages from the base surface, and the drive assembly drives the traveling wheels to rotate forward to move the trolley gantry along the track. When the lifting assembly is in the retracted state, the track disengages from the base surface, the adjustable support assembly contacts the base surface, and the drive assembly drives the traveling wheels to rotate in reverse to move the track along the first direction.

[0006] According to the technical solution provided in this application, the lifting assembly includes: A lifting cylinder is fixedly installed inside the trolley gantry; The guide core has one end fixedly connected to the drive end of the lifting cylinder, and the other end of the guide core passes through the guide seat and is fixedly connected to the walking assembly.

[0007] According to the technical solution provided in this application, the adjustable support component includes: The first support is fixedly disposed at the bottom of the guide seat; A lead screw, which is threadedly connected to the first support and extends in a vertical direction.

[0008] According to the technical solution provided in this application, the walking component includes: The second support is fixedly connected to the end of the guide core away from the lifting cylinder; The housing is rotatably connected to the end of the second support away from the lifting assembly via a first pin; the bottom of the housing is provided with a first opening, and a traveling wheel is rotatably provided inside the housing, the traveling wheel passing through the first opening and rollingly connected to the track.

[0009] According to the technical solution provided in this application, the drive assembly is installed on the housing, and the drive assembly includes: a motor, a drive wheel and a transmission chain. The motor is disposed on the housing, and the drive end of the motor is connected to the drive wheel. The drive wheel and the walking wheel are connected by the transmission chain.

[0010] According to the technical solution provided in this application, a bracket is provided at the bottom of the housing, and a mounting groove is provided at the bottom of the bracket. The two track clamping members are rotatably disposed on the inner wall of the mounting groove along the second direction.

[0011] According to the technical solution provided in this application, an anti-torsion component is provided between the guide seat and the guide core, and the anti-torsion component is used to restrict the circumferential rotation of the guide core.

[0012] According to the technical solution provided in this application, the anti-torsion component includes: A limiting groove is provided on the inner wall of the guide seat; A limiting protrusion is provided on the outer wall of the guide core and is slidably connected to the limiting groove.

[0013] According to the technical solution provided in this application, there are two self-laying track walking devices, which are located at both ends of the trolley gantry along the first direction, and the tracks of the two self-laying track walking devices are detachably connected by positioning pins.

[0014] The beneficial effects of this application are as follows: This application provides a self-tracking traveling device for a tunnel lining trolley. The self-tracking traveling device comprises at least one unit mounted on a trolley gantry. The self-tracking traveling device includes: a guide seat disposed at the bottom of the trolley gantry and a lifting assembly disposed inside the trolley gantry. The drive end of the lifting assembly passes through the guide seat and is connected to a traveling assembly, wherein the traveling assembly includes at least traveling wheels. Two track clamping members are disposed opposite each other at the bottom of the traveling assembly along a second direction. A track extending along a first direction is disposed between the two track clamping members. The two track clamping members clamp the track along the second direction, and the track is rotatably connected to the track clamping members and rotatably connected to the traveling wheels. Two adjustable support components are disposed opposite each other at the bottom of the guide seat along the second direction, and the two adjustable support components are located on both sides of the track. The adjustable support components are used to adjust the support height of the corresponding side of the trolley gantry.

[0015] Initially, the lifting assembly is in a retracted state, and the two adjustable support components support the base surface, keeping the entire trolley gantry stable. When the trolley needs to move, the lifting assembly extends, and its drive end drives the traveling assembly and the track to descend together until the track contacts the base surface. Then, the lifting assembly continues to extend, keeping the track in contact with the base surface, while the guide seat and the adjustable support components fixed to its bottom are relatively lifted, causing the adjustable support components to detach from the base surface. At this time, the drive assembly drives the traveling wheels to rotate clockwise, and the traveling wheels roll on the track, driving the trolley gantry to move smoothly along the track, realizing the lining operation. When a section of lining is completed and the track needs to be laid forward, the lifting assembly retracts, and the adjustable support assembly descends with the guide seat until it contacts the base surface and supports the trolley gantry. The lifting assembly continues to retract, and the traveling assembly and track are lifted upward, causing the track to detach from the base surface. Subsequently, the drive assembly drives the traveling wheels to rotate in the opposite direction. Utilizing the rolling friction between the traveling wheels and the track, the traveling wheels move the track forward relative to the traveling assembly, thus transporting the track to the predetermined position in front of the trolley. After the track is delivered to the designated position, the lifting assembly extends again, placing the track back onto the base surface. The adjustable support assembly then detaches from the base surface again, and the trolley can continue to move forward. This cycle repeats, enabling long-distance continuous self-laying track movement.

[0016] With the above structure, this device ensures that the track lands smoothly on the ground and the adjustable support components automatically detach from the base surface when the trolley is moving, ensuring that the traveling wheels roll along the track. When forward track laying is required, the lifting components reverse their movement, allowing the adjustable support components to precisely support the base surface and the track to lift off the base surface. The rolling friction between the traveling wheels and the track directly transports the track forward, eliminating the need for a traction motor, wire rope, or manual adjustment of the track rollers. This simplifies the track laying operation and reduces labor intensity and construction time. Simultaneously, the two adjustable support components can independently adjust their support height according to the ground elevation difference, effectively solving the problem of poor trolley stability on uneven or sloping base surfaces, preventing trolley tilting or deviation, and ensuring the accuracy and safety of lining construction. Attached Figure Description

[0017] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of a tunnel lining trolley self-tracking traveling device installed on the trolley gantry, as provided in Embodiment 1 of this application; Figure 2 yes Figure 1 A schematic diagram of part A in the middle; Figure 3 This is a schematic diagram of the self-track laying and traveling device provided in Embodiment 1 of this application when it is necessary to lay tracks forward; Figure 4 yes Figure 3 A schematic diagram of Part B; Figure 5 This is a schematic diagram of the self-laying track walking device provided in Embodiment 1 of this application when the trolley needs to move.

[0018] In the diagram: 1. Trolley gantry; 2. Guide seat; 3. Track clamp; 4. Traveling wheel; 5. Track; 6. Lifting cylinder; 7. Guide core; 8. First support; 9. Lead screw; 10. Second support; 11. Housing; 13. Motor; 14. Drive wheel; 15. Conveyor chain; 16. Bracket; 17. Limiting protrusion; 18. Arc-shaped component base surface; 19. Longitudinal beam base surface. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] Example 1 Please refer to Figures 1-5 This application provides a tunnel lining trolley self-tracking travel device, which is installed on the trolley gantry 1 and the number of such devices is at least one. The self-tracking travel device includes: Guide seat 2 is located at the bottom of the trolley gantry 1; The lifting assembly is located inside the trolley gantry 1. The drive end of the lifting assembly passes through the guide seat 2 and is connected to the traveling assembly. The traveling assembly includes at least traveling wheels 4. A drive assembly is mounted on the walking assembly and is connected to the walking wheel 4 via a transmission to drive the walking wheel 4 to rotate. Two track clamping members 3 are rotatably disposed at the bottom of the walking assembly along the second direction. A track 5 extending along the first direction is disposed between the two track clamping members 3. The two track clamping members 3 clamp the track 5 along the second direction, and the track 5 is rotatably connected to the track clamping members 3. The track 5 is rotatably connected to the walking wheel 4. The first direction is perpendicular to the second direction. Two adjustable support components are disposed opposite each other at the bottom of the guide seat 2 and on both sides of the track 5 along the second direction; the adjustable support components are used to adjust the support height of the corresponding side of the trolley gantry 1. The lifting assembly has an extended state and a retracted state. When the lifting assembly is in the extended state, the track 5 contacts the base surface, the adjustable support assembly disengages from the base surface, and the drive assembly drives the traveling wheel 4 to rotate forward so as to drive the trolley gantry 1 to travel along the track 5. When the lifting assembly is in the retracted state, the track 5 disengages from the base surface, the adjustable support assembly contacts the base surface, and the drive assembly drives the traveling wheel 4 to rotate in reverse so as to drive the track 5 to move along the first direction.

[0022] In this embodiment, as Figure 1 and Figure 3 As shown in the figure, a is the first direction and b is the second direction. Both the first and second directions are horizontal and perpendicular to each other.

[0023] Specifically, the track clamp 3 is a track roller; the track 5 has grooves extending along the first direction on both sides along the second direction, and the two track rollers are located on both sides of the track 5, and each is embedded in the groove on the corresponding side, forming a rolling connection with the groove.

[0024] Through the mating structure of the grooves and the track rollers, the track rollers not only clamp the track 5 from both sides, preventing lateral displacement or detachment during lifting or conveying, but also ensure smooth movement. In the trolley-moving state, the track 5 is fixed to the base surface, the traveling wheels 4 roll along the track 5, and the track rollers roll along the grooves of the track 5 with the traveling assembly. In the rail-feeding state, the track 5 is lifted off the base surface and suspended in the air, yet the track rollers still clamp it, allowing the track 5 to rise and fall together with the traveling assembly, while also allowing it to roll forward relative to the track rollers during conveying. This structure achieves stable clamping and reliable linkage of the track 5 in both traveling and rail-feeding modes.

[0025] Working principle: In the initial state, the lifting assembly is in the retracted state, and the two adjustable support components are supported on the base surface, keeping the entire trolley gantry 1 stable. When the trolley needs to move, the lifting assembly extends, and its drive end drives the traveling assembly and the track 5 to descend together until the track 5 contacts the base surface. Then the lifting assembly continues to extend, the track 5 remains in contact with the base surface, while the guide seat 2 and the adjustable support components fixed to its bottom are relatively lifted, causing the adjustable support components to detach from the base surface. At this time, the drive assembly drives the traveling wheel 4 to rotate clockwise, and the traveling wheel 4 rolls on the track 5, driving the trolley gantry 1 to move smoothly along the track 5 to realize the lining operation. When a section of lining is completed and track 5 needs to be laid forward, the lifting assembly retracts, and the adjustable support assembly descends with the guide seat 2 until it contacts the base surface. The lifting assembly continues to retract, and the traveling assembly and track 5 are lifted upward, causing track 5 to detach from the base surface. Subsequently, the drive assembly drives the traveling wheels 4 to rotate in the opposite direction. Utilizing the rolling friction between the traveling wheels 4 and track 5, the traveling wheels 4 drive track 5 forward relative to the traveling assembly, thereby transporting track 5 to the predetermined position in front of the trolley. After track 5 is transported to the designated position, the lifting assembly extends again, placing track 5 back onto the base surface. The adjustable support assembly then detaches from the base surface again, and the trolley can continue to move forward. This cycle repeats, enabling long-distance continuous self-laying track movement. With the above structure, this device ensures that the track 5 lands smoothly on the ground and the adjustable support components automatically detach from the base surface when the trolley is moving, ensuring that the traveling wheels 4 roll along the track 5. When forward track laying is required, the lifting components reverse their movement, allowing the adjustable support components to precisely support the base surface and the track 5 to lift off the base surface. The rolling friction between the traveling wheels 4 and the track 5 directly transports the track 5 forward, eliminating the need for the traction motor 13, wire rope, or manual adjustment of the track rollers. This simplifies the track laying operation and reduces labor intensity and construction time. Simultaneously, the two adjustable support components can independently adjust their support height according to the ground elevation difference, effectively solving the problem of poor trolley stability on uneven or sloping base surfaces, preventing trolley tilting or deviation, and ensuring the accuracy and safety of the lining construction.

[0026] In some embodiments, the lifting assembly includes: The lifting cylinder 6 is fixedly installed inside the trolley gantry 1; The guide core 7 has one end fixedly connected to the drive end of the lifting cylinder 6, and the other end of the guide core 7 passes through the guide seat 2 and is fixedly connected to the walking component.

[0027] Specifically, the lifting cylinder 6 has a piston rod, the end of which serves as its driving end and is fixedly connected to one end of the guide core 7.

[0028] like Figure 5 As shown, when the piston rod of the lifting cylinder 6 extends, the guide core 7 drives the traveling assembly and the track 5 to descend together. After the track 5 descends to contact the base surface, the piston rod continues to extend. At this time, since the track 5 can no longer descend, the traveling assembly and the track 5 remain in contact with the base surface, while the cylinder body of the lifting cylinder 6 and the trolley gantry 1, guide seat 2 and adjustable support assembly fixedly connected to it are driven by the reaction force to move upward relative to the traveling assembly, thereby causing the adjustable support assembly to detach from the base surface.

[0029] like Figure 3 As shown, when the piston rod of the lifting cylinder 6 retracts, the guide seat 2 and the adjustable support assembly fixed to its bottom descend together with the cylinder body, first allowing the adjustable support assembly to contact the base surface and form a stable support; as the piston rod continues to retract, the guide core 7 drives the traveling assembly and the track 5 to move upward, causing the track 5 to lift off the base surface. At this time, the adjustable support assembly remains supported on the base surface, and the trolley gantry 1 obtains stable support through the adjustable support assembly, preventing the entire trolley from becoming unstable after the track 5 is lifted off the base surface. Through the above action process, the guide core 7 rises and falls smoothly in the vertical direction under the constraint of the guide seat 2, ensuring that the track 5 can accurately contact or detach from the base surface, realizing a reliable switch between the traveling state and the track-feeding state.

[0030] In some implementations, the adjustable support component includes: The first support 8 is fixedly installed at the bottom of the guide seat 2; Lead screw 9 is threadedly connected to the first support 8, and extends vertically.

[0031] Specifically, in combination Figure 3 and Figure 5 As shown, the tunnel bottom structure includes an arc-shaped base surface 18 and a longitudinal beam base surface 19, wherein the longitudinal beam base surface 19 and the arc-shaped base surface 18 are arranged in a stepped manner, and the longitudinal beam base surface 19 is located above the arc-shaped base surface 18. In the traveling state, the track 5 is laid on the longitudinal beam base surface 19.

[0032] In actual construction, the support positions of the two adjustable support components vary: in some cases, one adjustable support component is supported on the curved base surface 18, and the other is supported on the longitudinal beam base surface 19. In this case, there is a height difference between the curved base surface 18 and the longitudinal beam base surface 19, and this height difference may vary in different sections of the tunnel due to construction errors or geological conditions. In other cases, both adjustable support components may be supported simultaneously on the longitudinal beam base surface 19, in which case the same base surface itself may be uneven or have a slope. All of these factors will affect the horizontal stability of the gantry crane 1. Therefore, it is necessary to pre-adjust the adjustable support components according to the actual base surface conditions before the gantry crane begins its operation.

[0033] Specifically, the construction workers rotate the lead screws 9 of the adjustable support components on both sides to adjust the extension length of the bottom end of the lead screw 9 relative to the first support 8, thereby independently adjusting the support height of the corresponding side of the trolley gantry 1. The two adjustable support components are located on both sides of the track 5 and are adjusted independently, which can adapt to changes in the height difference of the base surface in different sections, as well as to conditions where there is a slope or local unevenness on the same base surface. After adjustment, in the initial state and subsequent track feeding state (i.e., when the track 5 is lifted away from the longitudinal beam base surface 19), the bottom ends of the lead screws 9 of the adjustable support components on both sides are supported on the corresponding base surface at a preset height, ensuring that the trolley gantry 1 remains horizontal and stable, and preventing the trolley from tilting or deviating due to differences in base surface height or slope. Through the above pre-adjustment, the problem of poor trolley movement stability when the base surface is uneven, has a slope, or has changes in height difference between different sections can be effectively solved.

[0034] In some implementations, the walking component includes: The second support 10 is fixedly connected to the end of the guide core 7 away from the lifting cylinder 6; The housing 11 is rotatably connected to the end of the second support 10 away from the lifting assembly via a first pin. The bottom of the housing 11 is provided with a first opening, and a traveling wheel 4 is rotatably provided inside the housing 11. The traveling wheel 4 passes through the first opening and is rotatably connected to the track 5.

[0035] Specifically, such as Figure 2 As shown, the second support 10 is fixedly connected to the end of the guide core 7 away from the lifting cylinder 6, thereby transmitting the driving force of the lifting assembly to the walking assembly. The housing 11 is rotatably connected to the end of the second support 10 away from the lifting assembly via a first pin, allowing the housing 11 to swing relative to the second support 10 within a limited range around the first pin. This rotatable connection structure ensures that the walking wheel 4 maintains good rolling contact with the track 5 even when there are local unevenness or slight slopes in the track 5, preventing the walking wheel 4 from being suspended or unevenly stressed due to rigid connection, thereby improving walking stability.

[0036] The bottom of the housing 11 has a first opening, and a traveling wheel 4 is rotatably mounted inside the housing 11. The traveling wheel 4 passes through the first opening and partially protrudes from the bottom of the housing 11 to roll into contact with the track 5. With the above structure, when the drive assembly drives the traveling wheel 4 to rotate, the traveling wheel 4 rolls along the surface of the track 5, thereby moving the trolley gantry 1. At the same time, since the traveling wheel 4 and the track 5 have rolling friction, the friction force is small, the traveling efficiency is high, and when the traveling wheel 4 reverses in the rail-feeding state, it can drive the track 5 forward by relying on the rolling friction force.

[0037] In some embodiments, the drive assembly is mounted on the housing 11. The drive assembly includes a motor 13, a drive wheel 14, and a transmission chain 15. The motor 13 is mounted on the housing 11, and the drive end of the motor 13 is connected to the drive wheel 14. The drive wheel 14 and the walking wheel 4 are connected by the transmission chain 15.

[0038] Specifically, motor 13 is a reversible motor. When the trolley needs to move forward, the output shaft of motor 13 rotates forward, driving the drive wheel 14 to rotate forward, and through the transmission chain 15, driving the traveling wheel 4 to rotate forward. The traveling wheel 4 rolls along the track 5, thereby driving the trolley gantry 1 to move along the track 5 to achieve lining operation. When the track 5 needs to be transported forward, the output shaft of motor 13 rotates in reverse, and the traveling wheel 4 rotates in the opposite direction. Due to the rolling friction between the traveling wheel 4 and the track 5, the traveling wheel 4 drives the track 5 to move forward relative to the traveling assembly, achieving automatic transport of the track 5. Through the reversible control of the above-mentioned drive assembly, there is no need to set up an additional traction motor 13 or wire rope, and both traveling and track laying operation modes can be completed under the same power source, simplifying the power system and improving the ease of operation.

[0039] In some embodiments, the bottom of the housing 11 is provided with a bracket 16, the bottom of the bracket 16 is provided with a mounting groove, and the two track clamping members 3 are rotatably disposed on the inner wall of the mounting groove along the second direction.

[0040] Specifically, such as Figure 2 and Figure 4 As shown, the bracket 16 is fixedly connected to the bottom of the housing 11 and provides mounting support for the track clamping member 3. The bottom of the bracket 16 has a mounting groove, and the two track clamping members 3 are rotatably mounted on the inner wall of the mounting groove, facing each other to clamp the track 5 from both sides. The bottom of the housing 11 has a first opening, through which the traveling wheel 4 protrudes and is rotatably connected to the track 5. The bracket 16 is located on one side of the traveling wheel 4 along the first direction, which neither affects the contact between the traveling wheel 4 and the track 5, but also reliably supports the track clamping member 3, achieving stable clamping of the track 5. Through this structure, the traveling wheel 4 and the track clamping member 3 each perform their respective functions: the traveling wheel 4 is used to drive the trolley to move and deliver the track, while the bracket 16 and the track clamping member 3 are used to clamp and guide the track 5.

[0041] In some embodiments, an anti-torsion assembly is provided between the guide seat 2 and the guide core 7, the anti-torsion assembly being used to restrict the circumferential rotation of the guide core 7.

[0042] Specifically, an anti-torsion component is provided between the guide seat 2 and the guide core 7. While allowing the guide core 7 to reciprocate linearly relative to the guide seat 2 in the vertical direction, it restricts the relative circumferential rotation between the two. When the lifting cylinder 6 drives the guide core 7 to move up and down, this anti-torsion component can prevent the guide core 7 from rotating around its own axis, thereby ensuring that the traveling component and track 5, which are fixedly connected to the lower end of the guide core 7, always maintain the correct orientation and avoid the traveling wheel 4 from deviating or the track 5 from deviating due to torsion. At the same time, by limiting the circumferential rotation of the guide core 7, the torsional torque transmitted to the driving end of the lifting cylinder 6 is eliminated, so that the lifting cylinder 6 only bears the axial load, preventing the piston rod from wearing unevenly and the cylinder from deviating and becoming unstable, thus ensuring the smoothness and reliability of the lifting action.

[0043] In some embodiments, the anti-torsion component includes: A limiting groove is provided on the inner wall of the guide seat 2; The limiting protrusion 17 is disposed on the outer wall of the guide core 7 and is slidably connected to the limiting groove.

[0044] Specifically, a limiting groove is vertically formed on the inner wall of the guide seat 2, and a limiting protrusion 17 is provided on the outer wall of the guide core 7 (in this embodiment, the limiting protrusion 17 is fixedly connected to the guide core 7 or integrally formed), and the limiting protrusion 17 is embedded in the limiting groove, forming a sliding fit between the two. When the lifting cylinder 6 drives the guide core 7 to move vertically, the limiting protrusion 17 slides along the limiting groove, thereby restricting the circumferential rotation of the guide core 7 relative to the guide seat 2 and preventing the guide core 7 from rotating around its own axis.

[0045] In some embodiments, two self-tracking traveling devices are provided, located at both ends of the trolley gantry 1 along the first direction, and the tracks 5 of the two self-tracking traveling devices are detachably connected by positioning pins.

[0046] Specifically, such as Figure 1As shown, the gantry frame 1 is equipped with self-laying track devices at both ends along the first direction. The tracks 5 of the two self-laying track devices are detachably connected by positioning pins, thus splicing them into a longer track 5. This allows the gantry to travel continuously for a longer period before transporting the track 5, reducing the frequency of track transport and docking, improving construction efficiency, and facilitating the transportation and subsequent replacement and maintenance of the track 5. When forward track laying is required, the tracks 5 of the two self-laying track devices are simultaneously lifted off the base surface and transported forward. Since the two track sections 5 are always connected by positioning pins, the relative position of the tracks 5 remains unchanged during transport, and they can be directly lowered after being transported to the designated position.

[0047] Workflow: Based on the actual condition of the base surface, the construction personnel rotate the lead screws 9 of the adjustable support components on both sides to adjust the extension length of the bottom end of the lead screw 9 relative to the first support 8, thereby independently adjusting the support height of the corresponding side of the trolley gantry 1 to keep the entire trolley gantry 1 stable. When the trolley needs to move, the piston rod of the lifting cylinder 6 extends, and the guide core 7 drives the traveling component and the track 5 to descend together until the track 5 contacts the base surface. Then the piston rod of the lifting cylinder 6 continues to extend, at which point the track 5 remains in contact with the base surface, while the guide seat 2 and the adjustable support component fixed to its bottom are relatively lifted, causing the adjustable support component to detach from the base surface. Subsequently, the output shaft of the control motor 13 rotates forward, driving the drive wheel 14 to rotate forward, and through the transmission chain 15, driving the traveling wheel 4 to rotate forward. The traveling wheel 4 rolls along the track 5, thereby driving the trolley gantry 1 to move along the track 5 to realize the lining operation. When a section of lining is completed and track 5 needs to be laid forward, the piston rod of the lifting cylinder 6 retracts, and the adjustable support assembly descends with the guide seat 2 until it contacts the base surface. The piston rod continues to retract, and the traveling assembly and track 5 are lifted upward, causing track 5 to detach from the base surface. Subsequently, the output shaft of the control motor 13 reverses, driving the drive wheel 14 to reverse, and through the transmission chain 15, driving the traveling wheel 4 to rotate in the opposite direction. Utilizing the rolling friction between the traveling wheel 4 and track 5, the traveling wheel 4 drives track 5 forward relative to the traveling assembly, thereby transporting track 5 to the predetermined position in front of the trolley. After track 5 is transported to the position, the piston rod of the lifting cylinder 6 extends again, placing track 5 on the base surface, and the adjustable support assembly detaches from the base surface again, allowing the trolley to continue moving forward. This cycle enables long-distance continuous self-laying track movement.

[0048] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A self-tracking travel device for a tunnel lining trolley, characterized in that, The self-laying track traveling device is installed on the trolley gantry (1) and is at least one in number. A guide seat (2) is provided at the bottom of the trolley gantry (1); A lifting assembly is disposed inside the trolley gantry (1), and the driving end of the lifting assembly passes through the guide seat (2) and is connected to a traveling assembly; the traveling assembly includes at least a traveling wheel (4). A drive assembly is disposed on the walking assembly, and the drive assembly is connected to the walking wheel (4) for driving the walking wheel (4) to rotate; Two track clamps (3) are rotatably disposed at the bottom of the walking assembly along a second direction. A track (5) extending along a first direction is disposed between the two track clamps (3). The two track clamps (3) clamp the track (5) along the second direction, and the track (5) is rotatably connected to the track clamps (3). The track (5) is rotatably connected to the walking wheel (4). The first direction is perpendicular to the second direction. Two adjustable support components are disposed opposite each other at the bottom of the guide seat (2) and on both sides of the track (5) along the second direction; the adjustable support components are used to adjust the support height of the corresponding side of the trolley gantry (1); The lifting assembly has an extended state and a retracted state. When the lifting assembly is in the extended state, the track (5) contacts the base surface, the adjustable support assembly disengages from the base surface, and the drive assembly drives the walking wheel (4) to rotate forward to drive the trolley gantry (1) to move along the track (5). When the lifting assembly is in the retracted state, the track (5) disengages from the base surface, the adjustable support assembly contacts the base surface, and the drive assembly drives the walking wheel (4) to rotate in reverse to drive the track (5) to move along the first direction.

2. The tunnel lining trolley self-tracking device according to claim 1, characterized in that, The lifting assembly includes: The lifting cylinder (6) is fixedly installed inside the trolley gantry (1); The guide core (7) has one end fixedly connected to the drive end of the lifting cylinder (6), and the other end of the guide core (7) passes through the guide seat (2) and is fixedly connected to the walking assembly.

3. The tunnel lining trolley self-tracking device according to claim 1, characterized in that, The adjustable support component includes: The first support (8) is fixedly disposed at the bottom of the guide seat (2); A lead screw (9) is threadedly connected to the first support (8) and extends in the vertical direction.

4. The tunnel lining trolley self-tracking device according to claim 2, characterized in that, The walking component includes: The second support (10) is fixedly connected to the end of the guide core (7) away from the lifting cylinder (6); The housing (11) is rotatably connected to the second support (10) at the end away from the lifting assembly via a first pin; the bottom of the housing (11) is provided with a first opening, and a traveling wheel (4) is rotatably provided inside the housing (11), and the traveling wheel (4) passes through the first opening and is rotatably connected to the track (5).

5. The tunnel lining trolley self-tracking device according to claim 4, characterized in that, The drive assembly is mounted on the housing (11). The drive assembly includes a motor (13), a drive wheel (14), and a transmission chain (15). The motor (13) is mounted on the housing (11). The drive end of the motor (13) is connected to the drive wheel (14). The drive wheel (14) is connected to the walking wheel (4) via the transmission chain (15).

6. The tunnel lining trolley self-tracking device according to claim 4, characterized in that, The bottom of the housing (11) is provided with a bracket (16), and the bottom of the bracket (16) is provided with a mounting groove. The two track clamps (3) are rotatably disposed on the inner wall of the mounting groove along the second direction.

7. The tunnel lining trolley self-tracking device according to claim 2, characterized in that, An anti-torsion component is provided between the guide seat (2) and the guide core (7), and the anti-torsion component is used to restrict the circumferential rotation of the guide core (7).

8. The tunnel lining trolley self-tracking device according to claim 7, characterized in that, The anti-torsion component includes: A limiting groove is provided on the inner wall of the guide seat (2); A limiting protrusion (17) is provided on the outer wall of the guide core (7) and is slidably connected to the limiting groove.

9. A tunnel lining trolley self-tracking device according to claim 1, characterized in that, Two self-laying track walking devices are provided, located at both ends of the trolley gantry (1) along the first direction, and the tracks (5) of the two self-laying track walking devices are detachably connected by positioning pins.

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