Tunnel lining trolley positioning device

Abstract

The utility model discloses a tunnel lining trolley positioning device which is arranged on a bottom bearing structure of a lining trolley and comprises a mounting platform, a clamping assembly, a force amplifying mechanism and a driving module, and the mounting platform is arranged on the bottom bearing structure and is in a suspended state relative to a track; the number of the clamping assemblies is two, the two clamping assemblies are arranged on the two sides of the axis of the rail in a bilateral symmetry mode, and each clamping assembly comprises a clamping jaw; the force amplification mechanism can amplify and transmit the clamping force; the driving module is mounted on the mounting platform and is connected with the two clamping jaws through the force amplification mechanism; the driving module converts output torque into clamping force through a force amplification mechanism, the clamping force is multiplied and output to the clamping jaws, and when the clamping working condition is executed, the two clamping jaws form bilateral synchronous clamping constraint on the rail web. The positioning device of the tunnel lining trolley can assist in positioning and locking of the trolley and prevent the trolley from moving at will.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, specifically to a positioning device for a tunnel lining trolley. Background Technology

[0002] Tunnel lining trolleys are specialized equipment used in the secondary lining process during tunnel construction, specifically for constructing the concrete lining of the tunnel's inner walls. They are mainly categorized into simple lining trolleys, fully hydraulic automatic walking lining trolleys, and grid-type lining trolleys.

[0003] The construction process of the tunnel lining trolley includes the following steps:

[0004] 1. Track installation: Determine the installation benchmark, lay the track, and ensure that the track height, center distance, elevation, etc. meet the design requirements;

[0005] 2. Trolley movement and positioning: Check whether the structure of each part is in place, check whether the bolt connection is firm, then make preliminary adjustments, and then move the trolley onto the track. After the trolley is in place, lock the traveling wheels.

[0006] 3. Formwork erection: Operate the hydraulic station to adjust the shape of the formwork to meet the construction requirements and ensure that the center line of the formwork coincides with the center line of the tunnel.

[0007] In the existing technology, the trolley positioning system has a significant technical bottleneck: its traveling mechanism brakes rely on a single mechanical hub locking device. Under the working conditions of an inclined working face with a longitudinal slope of more than 5% in the tunnel, the axial sliding torque generated by the gravity component of the trolley body (its own weight is usually >50t) will exceed the static friction threshold of the traditional braking structure, thus leading to the risk of the trolley moving arbitrarily during the construction project. Utility Model Content

[0008] To address the shortcomings of existing technologies, the technical problem to be solved by this utility model is to provide a tunnel lining trolley positioning device that can assist in positioning and locking the trolley, preventing it from moving arbitrarily.

[0009] To achieve the above objectives, this utility model is implemented through the following technical solution: a tunnel lining trolley positioning device, installed on the bottom bearing structure of the lining trolley, comprising:

[0010] The mounting platform is set on the bottom support structure and is suspended relative to the track;

[0011] The clamping assembly has two sets, which are arranged symmetrically on both sides of the track axis. Each clamping assembly includes a gripper.

[0012] Force amplification mechanism can amplify and transmit clamping force;

[0013] The drive module is mounted on the mounting platform and connected to the two grippers via the force amplification mechanism;

[0014] The drive module converts the output torque into a clamping force through a force amplification mechanism and sends it to the gripper. When the clamping condition is executed, the two grippers form a double-sided synchronous clamping constraint on the track web.

[0015] Furthermore, the force amplification mechanism includes a vertical guide slider, a first transmission pair, a second transmission pair, and a pressure rod assembly;

[0016] The drive module can drive the vertical guide slider to rise and fall perpendicular to the ground;

[0017] The first transmission pair includes a left-side parallel four-bar linkage, with each link hinged by a pin to form a planar kinematic chain. The upper end is hinged to the vertical guide slider, and the lower end is connected to the left-side gripper.

[0018] The second transmission pair includes a right-side parallel four-bar linkage, which is symmetrically arranged and has a mirror-symmetrical transmission path;

[0019] The pressure rod assembly includes a left swing arm component and a right swing arm component. The left swing arm component and the right swing arm component are respectively hinged to the mounting platform through a rotating shaft, and the lower end forms a torque transmission node with the four-bar linkage on the corresponding side.

[0020] The axial displacement of the vertical guide slider is converted into the horizontal clamping displacement of the gripper through the combined transmission of the four-bar linkage and the swing arm component.

[0021] Furthermore, the drive module includes a rotary power source and a lead screw. The lead screw axis is set perpendicular to the ground and is threadedly connected to the vertical guide slider. The rotary power source is used to drive the lead screw to rotate clockwise or counterclockwise.

[0022] Furthermore, it also includes an anti-reverse mechanism, which is connected to the output shaft of the rotating power source and can prevent the output shaft from rotating counterclockwise.

[0023] Furthermore, the anti-reverse mechanism includes a ratchet disc, pawls, and a pneumatic unlocking unit. The ratchet disc is sleeved and fixed on the output shaft. The top end of the pawl is hinged to the mounting platform. When the bottom end of the pawl is inserted between the two ratchet teeth of the ratchet disc, it can prevent the ratchet disc from rotating counterclockwise. The pneumatic unlocking unit is connected to all the pawls and can simultaneously drive all the pawls to disengage from their corresponding ratchet discs.

[0024] Furthermore, the pneumatic unlocking unit includes an inflation device and a lifting airbag. The lifting airbag is disposed on the mounting platform and close to the pawl. The inflation device is used to inflate the lifting airbag. When the inflation device is in an inflated state, it can lift the pawl to disengage the pawl from the ratchet disc.

[0025] Furthermore, the working surface of the gripper is provided with an anti-slip pad.

[0026] The beneficial effects of this utility model are:

[0027] In the aforementioned tunnel lining trolley positioning device, during the lining trolley's movement, the grippers disengage from the track. Upon reaching the destination, the drive module, through a force amplification mechanism, drives the two grippers to perform a clamping action, thereby forming a synchronous clamping constraint on both sides of the track web. During the clamping process, the drive module converts the output torque into a multiplied clamping force output through the force amplification mechanism, significantly improving the clamping effect and enhancing the overall positioning stability of the lining trolley. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0029] Figure 1 A schematic diagram of a tunnel lining trolley positioning device provided in an embodiment of this utility model;

[0030] Figure 2 for Figure 1 A schematic diagram of the tunnel lining trolley positioning device from another angle;

[0031] Figure 3 for Figure 2 A schematic diagram at point A in the middle;

[0032] Figure label:

[0033] 100. Bottom bearing structure; 200. Mounting platform; 300. Clamping assembly; 400. Force amplification mechanism; 410. Vertical guide slider; 420. First transmission pair; 430. Second transmission pair; 440. Pressure rod assembly; 441. Left swing arm component; 442. Right swing arm component; 500. Drive module; 510. Rotary power source; 520. Lead screw; 600. Anti-reverse mechanism; 610. Ratchet; 620. Pawl; 630. Pneumatic unlocking unit; 700. Track. Detailed Implementation

[0034] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the invention; therefore, the invention is not limited to the specific embodiments disclosed below.

[0035] Please see Figures 1 to 3 This utility model provides a tunnel lining trolley positioning device, which is installed on the bottom bearing structure 100 of the lining trolley and includes an installation platform 200, a clamping component 300, a force amplification mechanism 400 and a drive module 500.

[0036] The specific mounting platform 200 is set on the bottom supporting structure 100 and is suspended relative to the track 700. There are two sets of clamping assemblies 300, symmetrically arranged on both sides of the track 700 axis. Each clamping assembly 300 includes grippers. A force amplification mechanism 400 amplifies and transmits the clamping force. The drive module 500 is mounted on the mounting platform 200 and connected to the two grippers via the force amplification mechanism 400. Specifically, the drive module 500 converts the output torque into a multiplied clamping force, which is then transmitted to the grippers. When clamping is performed, the two grippers form a synchronous clamping constraint on both sides of the track 700 web.

[0037] During operation, as the lining trolley moves, the grippers disengage from the track 700. Upon reaching the destination, the drive module 500, through the force amplification mechanism 400, drives the two grippers to perform a clamping action, thereby forming a synchronous clamping constraint on both sides of the track 700 web. During the clamping process, the drive module 500 converts the output torque into a multiplied clamping force of the grippers through the force amplification mechanism 400, thus significantly improving the gripping effect and enhancing the positioning stability of the entire lining trolley.

[0038] In this embodiment, the force amplification mechanism 400 includes a vertical guide slider 410, a first transmission pair 420, a second transmission pair 430, and a pressure rod assembly 440. The drive module 500 can drive the vertical guide slider 410 to rise and fall vertically to the ground. The first transmission pair 420 includes a left-side parallel four-bar linkage, with each link hinged to a planar kinematic chain via a pin. The upper end is hinged to the vertical guide slider 410, and the lower end is connected to the left-side gripper. The second transmission pair 430 includes a right-side parallel four-bar linkage, symmetrically arranged with a mirror-symmetrical transmission path.

[0039] The pressure rod assembly 440 includes a left swing arm component 441 and a right swing arm component 442. The left swing arm component 441 and the right swing arm component 442 are respectively hinged to the mounting platform 200 via rotating shafts, and their lower ends form torque transmission nodes with the corresponding four-bar linkages. The axial displacement of the vertical guide slider 410 is converted into the horizontal clamping displacement of the gripper through the combined transmission of the four-bar linkages and the swing arm components.

[0040] In use, when the drive module 500 drives the vertical guide slider 410 to descend perpendicularly to the ground, the two grippers can be driven to open through the left parallel four-bar linkage, the right parallel four-bar linkage, the left swing arm component 441, and the right swing arm component 442. Conversely, when the vertical guide slider 410 is driven to rise, the grippers can be driven to close. During the clamping process, the left parallel four-bar linkage, the right parallel four-bar linkage, the left swing arm component 441, and the right swing arm component 442 multiply the clamping force, thereby improving the clamping effect.

[0041] Specifically, the drive module 500 includes a rotary power source 510 and a lead screw 520. The axis of the lead screw 520 is set perpendicular to the ground and is threadedly connected to the vertical guide slider 410. The rotary power source 510 is used to drive the lead screw 520 to rotate clockwise or counterclockwise. By using the lead screw 520 transmission method, the transmission of force can be made more stable.

[0042] In implementation, the rotary power source 510 can be any power source capable of driving the lead screw 520 to rotate in both directions. When multiple tunnel lining trolley positioning devices are installed, multiple rotary power sources 510 can be started synchronously through the control mechanism, reducing the number of operation steps.

[0043] In a preferred embodiment, the device includes an anti-reverse mechanism 600, which is connected to the output shaft of the rotary power source 510 and can prevent the output shaft from rotating counterclockwise.

[0044] Specifically, the anti-reverse mechanism 600 includes a ratchet disc 610, pawls 620, and a pneumatic unlocking unit 630. The ratchet disc 610 is fixed on the output shaft. The top of the pawls 620 is hinged to the mounting platform 200. When the bottom of the pawls 620 is inserted between the two ratchet teeth of the ratchet disc 610, it can prevent the ratchet disc 610 from rotating counterclockwise. The pneumatic unlocking unit 630 is connected to all the pawls 620 and can simultaneously drive all the pawls 620 to disengage from the corresponding ratchet disc 610.

[0045] When in use, by preventing the ratchet disc 610 from rotating counterclockwise, the output shaft can be prevented from rotating counterclockwise, thus preventing the grippers from loosening.

[0046] In this embodiment, the pneumatic unlocking unit 630 includes an inflation device and a lifting airbag. The lifting airbag is mounted on the mounting platform 200 and is located near the pawl 620. The inflation device is used to inflate the lifting airbag. When the inflation device is in the inflated state, it can lift the pawl 620 to disengage the pawl 620 from the ratchet disc 610.

[0047] This method allows for quick and convenient movement of the pawl 620. In practical implementation, when there are multiple positioning devices for the tunnel lining trolley, all the lifting airbags can be connected together and inflated or deflated using the same inflation device, so that all the lifting airbags can operate simultaneously.

[0048] It should be noted that, in practical implementation, anti-slip pads can be placed on the working surface of the grippers to improve anti-slip capability. At the same time, the shape of the working surface of the grippers also needs to be adapted to the guide rail 700 to improve clamping capacity.

[0049] The tunnel lining trolley using the above-mentioned tunnel lining trolley positioning device can improve its positioning ability on the inclined surface through the auxiliary clamping action of the tunnel lining trolley positioning device, thereby ensuring the smooth progress of lining.

[0050] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A positioning device for a tunnel lining trolley, characterized in that, It is installed on the bottom load-bearing structure of the lining trolley, including: The mounting platform is set on the bottom support structure and is suspended relative to the track; The clamping assembly has two sets, which are arranged symmetrically on both sides of the track axis. Each clamping assembly includes a gripper. Force amplification mechanism can amplify and transmit clamping force; The drive module is mounted on the mounting platform and connected to the two grippers via the force amplification mechanism; The drive module converts the output torque into a clamping force through a force amplification mechanism and sends it to the gripper. When the clamping condition is executed, the two grippers form a double-sided synchronous clamping constraint on the track web.

2. The tunnel lining trolley positioning device according to claim 1, characterized in that, The force amplification mechanism includes a vertical guide slider, a first transmission pair, a second transmission pair, and a pressure rod assembly; The drive module can drive the vertical guide slider to rise and fall perpendicular to the ground; The first transmission pair includes a left-side parallel four-bar linkage, with each link hinged by a pin to form a planar kinematic chain. The upper end is hinged to the vertical guide slider, and the lower end is connected to the left-side gripper. The second transmission pair includes a right-side parallel four-bar linkage, which is symmetrically arranged and has a mirror-symmetrical transmission path; The pressure rod assembly includes a left swing arm component and a right swing arm component. The left swing arm component and the right swing arm component are respectively hinged to the mounting platform through a rotating shaft, and the lower end forms a torque transmission node with the four-bar linkage on the corresponding side. The axial displacement of the vertical guide slider is converted into the horizontal clamping displacement of the gripper through the combined transmission of the four-bar linkage and the swing arm component.

3. The tunnel lining trolley positioning device according to claim 2, characterized in that, The drive module includes a rotary power source and a lead screw. The lead screw axis is set perpendicular to the ground and is threadedly connected to the vertical guide slider. The rotary power source is used to drive the lead screw to rotate clockwise or counterclockwise.

4. The tunnel lining trolley positioning device according to claim 3, characterized in that, It also includes an anti-reverse mechanism, which is connected to the output shaft of the rotating power source and can prevent the output shaft from rotating counterclockwise.

5. The tunnel lining trolley positioning device according to claim 4, characterized in that, The anti-reverse mechanism includes a ratchet disc, pawls, and a pneumatic unlocking unit. The ratchet disc is sleeved and fixed on the output shaft. The top end of the pawl is hinged to the mounting platform. When the bottom end of the pawl is inserted between the two ratchet teeth of the ratchet disc, it can prevent the ratchet disc from rotating counterclockwise. The pneumatic unlocking unit is connected to all the pawls and can simultaneously drive all the pawls to disengage from their corresponding ratchet discs.

6. The tunnel lining trolley positioning device according to claim 5, characterized in that, The pneumatic unlocking unit includes an inflation device and a lifting airbag. The lifting airbag is disposed on the mounting platform and close to the pawl. The inflation device is used to inflate the lifting airbag. When the inflation device is in an inflated state, it can lift the pawl to disengage the pawl from the ratchet disc.

7. The tunnel lining trolley positioning device according to claim 1, characterized in that, The working surface of the gripper is provided with an anti-slip pad.

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