Tunnel construction trolley with locking device and control method

Abstract

The application discloses a tunnel construction trolley with locking device and a control method. The trolley comprises a trolley lower layer and a trolley upper layer movably arranged on the trolley lower layer. The trolley lower layer is provided with a clamping locking device. The clamping locking device clamps and fixes the longitudinal fixing member on the trolley upper layer by moving the two oppositely arranged clamping blocks towards each other. The front end of the trolley upper layer is provided with at least two first supporting legs. Preferably, the trolley lower layer is also movably provided with a bracket. The bracket can extend in the extending direction of the trolley upper layer, and the front end of the bracket is provided with at least two second supporting legs. The trolley upper layer is supported on the trolley lower layer and the bracket. The control method is used for locking control of the trolley upper layer of the trolley. The trolley is provided with the clamping locking device and the intermediate bracket, so that the stability of the trolley upper layer in the extending state and the entire trolley construction operation is greatly improved. The control method can ensure that the trolley upper layer is always locked in the static state.

Description

Technical Field

[0001] This invention relates to tunnel construction technology, and in particular to a tunnel construction trolley with a locking device and a control method thereof. Background Technology

[0002] Tunnel construction trolleys are mobile platforms used for various construction operations in underground tunnels such as high-speed railways, highways, and urban subways. They include trolleys with single-function operations and multi-function trolleys capable of performing at least two of the following operations: excavation, arch frame installation, and initial support spraying and anchoring. Existing tunnel excavation methods mainly include full-face excavation, micro-bench excavation, two-bench excavation, and three-bench excavation. Therefore, existing tunnel construction trolleys are typically designed with at least two layers, with adjacent upper and lower layers forming a telescopic structure that allows for relative sliding. However, existing construction trolleys cannot lock the extended state or position after the upper layer extends, allowing the upper and lower layers to still slide relative to each other. If a collapse or rockfall occurs during construction, the upper trolley is prone to sliding under longitudinal impact from the rock, posing safety hazards such as overturning and damage to construction equipment or personnel falling. Therefore, further improvements are needed. Summary of the Invention

[0003] The primary objective of this invention is to address the instability of existing tunnel construction trolleys in the extended state of the upper layer by providing a tunnel construction trolley with a locking device. This trolley utilizes a clamping and locking device on the lower layer of the trolley. By moving two opposing clamping blocks within the device, the longitudinal components on the upper layer of the trolley are clamped and locked in place during the extended state, preventing accidental retraction and improving the stability of the extended upper layer. This provides strong protection for the safety of construction equipment and personnel.

[0004] To achieve the primary objective, the present invention adopts the following technical solution.

[0005] A tunnel construction trolley with a locking device includes a lower trolley layer and an upper trolley layer that is telescopically and movably mounted on the lower trolley layer; the lower trolley layer is provided with a clamping and locking device, which clamps and fixes the longitudinal fixing members on the upper trolley layer by moving two oppositely arranged clamping blocks toward each other.

[0006] The tunnel construction trolley employing the aforementioned technical solution utilizes a clamping and locking device on its lower layer. This device, consisting of two opposing clamping blocks, allows for relative movement, thereby clamping and locking the longitudinal components of the upper layer of the trolley during its extended operation. This prevents accidental retraction, improves the stability of the extended upper layer, and provides strong protection for the safety of construction equipment and personnel. The trolley can have two or three layers. In a two-layer configuration, the lower layer constitutes the bottom layer, and the upper layer constitutes the top layer. In a three-layer configuration, the upper layer is the top layer, and the middle layer is the lower layer. Conversely, if the upper layer is the middle layer, the bottom layer is the lower layer. The longitudinal frame refers to rod-shaped or tubular components extending longitudinally along the trolley, with exposed clamping portions on their outer periphery that can be held by locking blocks. Examples include a portion of a rectangular cross-section or a large semicircle of a circular cross-section.

[0007] Preferably, both clamping blocks are L-shaped, and the horizontal sections of the L-shape form support for the upper layer of the trolley. By forming support for the upper layer of the trolley through the horizontal sections of the clamping blocks, the support surface for the upper layer of the trolley is increased, changing the line contact support method of the prior art, which is only supported by rollers, to a surface contact support method, thereby improving support stability, resistance to heavy object impact, and overall effectiveness.

[0008] Preferably, both clamping blocks are movably mounted on the base, which is fixed to the lower layer of the trolley; each clamping block is driven to move by a locking cylinder; alternatively, the two clamping blocks are driven to move via a two-way lead screw and lead screw-nut assembly; or, the two clamping blocks form a floating clamping structure and are driven to move by a locking cylinder. This allows for various clamping and locking device structures, facilitating flexible selection based on available space.

[0009] In a further preferred embodiment, in a structure where the two clamping blocks are each driven to move by a locking cylinder, each clamping block is connected to a locking cylinder, which is fixed to the base or the lower layer of the trolley. This structure is simple, easy to arrange, and effectively utilizes internal space. In a structure where the two clamping blocks are driven to move via a bidirectional lead screw and a lead screw-nut pair structure, each clamping block has a nut integrally formed or fixedly connected to it. The two nuts have opposite helical directions and are screwed onto two oppositely helical threaded sections of the bidirectional lead screw. One end of the bidirectional lead screw is fixedly connected to the output shaft of a drive motor, which is fixed to the base or the lower layer of the trolley. The drive motor is either an electric motor or a hydraulic motor. This provides reliable locking, allows the machine to stop in the locked state, and reduces energy consumption. In a structure where two clamping blocks form a floating clamping structure and are driven to move by a locking cylinder, the two clamping blocks consist of a first clamping block and a second clamping block. The second clamping block is integrally formed or fixedly connected to the slider, and the first clamping block is movably mounted on the slider. The first clamping block is connected to the locking cylinder, which is fixed to the slider. The slider is movable only on the base, and a return spring is provided between the base and the slider. Compared to a two-cylinder solution, this design saves one cylinder, thus reducing costs.

[0010] Preferably, the upper layer of the trolley has at least two first legs at its front end; the lower layer of the trolley also has a bracket that is retractably movable via a first hydraulic cylinder, the bracket can extend in the direction of the upper layer of the trolley, and the front end of the bracket has at least two second legs; the upper layer of the trolley is supported on both the lower layer of the trolley and the bracket, and a connecting member is provided between the bracket and the upper layer of the trolley. By providing a retractable bracket on the lower layer of the trolley and a second leg at the front end of the bracket, the upper layer of the trolley can extend and retract synchronously with the bracket under the action of the connecting member during the extension of the bracket, and form support for the upper layer of the trolley in the extended state after extension. Thus, the front end of the upper layer of the trolley is supported by the first legs, the middle part is supported on the bracket, and the rear end rests on the lower layer of the trolley. Combined with the clamping and locking device, the overall stability of the trolley is further improved. During construction operations, it can withstand accidental impacts such as rock collapse or falling construction equipment without tipping over or retracting, and has strong resistance to deformation, further ensuring the safety of construction equipment and personnel.

[0011] More preferably, the connecting member is composed of a second hydraulic cylinder. The second hydraulic cylinder is used to adjust the relative position between the bracket and the upper layer of the trolley, so as to obtain a reasonable support position when used for step construction with different depths.

[0012] Preferably, the bracket consists of a crossbeam and two longitudinal beams fixedly connected in a "π" shape, with the two longitudinal beams forming two first guide rails for the telescopic movement of the bracket. The lower layer of the trolley is equipped with first support rollers, which form a rolling guide rail pair structure with the first guide rails. The lower layer of the trolley also has multiple first limiting rollers located above and to the sides of the first guide rails. The second support leg is mounted on the crossbeam. This design aims to create a larger structural dimension, expanding the support range for the upper layer of the trolley. The first limiting rollers on the top and sides prevent the extended end from tilting downwards and swaying left and right. The second support leg is positioned as far forward as possible on the crossbeam, improving support stability from all directions. To reduce weight, both the crossbeam and longitudinal beams can be made of rectangular or square tubing. When using tubing, end plates are installed at both ends to increase structural strength.

[0013] More preferably, one end of the longitudinal beam is provided with a flange, and the flange is fixedly connected to the cross beam by bolts. This increases the structural size of the connection part by using the flange, thereby improving the connection stability.

[0014] More preferably, the upper layer of the trolley is provided with two second guide rails and two anti-tipping limiting beams, with the second guide rails and anti-tipping limiting beams arranged in parallel; the lower layer of the trolley is provided with second support rollers and second limiting rollers, the second support rollers supporting the second guide rails; the second limiting rollers are located above and to the side of the anti-tipping limiting beams; the front end of the bracket is also provided with second limiting rollers located above and to the side of the anti-tipping limiting beams; the longitudinal fixing component is composed of the second guide rails or the anti-tipping limiting beams. This design, using the second support rollers and second guide rails to form a rolling guide rail pair structure, reduces the resistance to telescopic movement, saves energy, and utilizes the second limiting rollers and anti-tipping limiting beams to prevent the upper layer of the trolley from tipping over. The bracket enhances the anti-tipping effect on the upper layer of the trolley in its extended state, thereby eliminating the risk of tipping over when impacted by heavy objects on one side, further ensuring the safety of construction equipment and personnel. Furthermore, the high structural strength of the second guide rails or anti-tipping limiting beams ensures a secure locking mechanism.

[0015] To achieve the second objective, the present invention adopts the following technical solution.

[0016] A control method for a tunnel construction trolley, used to control a tunnel construction trolley with a locking device; including establishing a linkage between the clamping and locking device and the upper layer of the trolley, unlocking the clamping and locking device before the upper layer of the trolley extends or retracts, and locking the clamping and locking device after the upper layer of the trolley stops at any position.

[0017] The aforementioned control method utilizes a clamping and locking device to lock the position of the upper layer of the trolley. By linking the clamping and locking device with the upper layer of the trolley, the clamping and locking device is unlocked before the upper layer of the trolley extends or retracts. After the upper layer of the trolley stops at any position, the clamping and locking device is locked, thus forming the entire trolley into a rigid body in the locked state. This significantly improves the trolley's impact resistance and fully ensures the safety of construction equipment and personnel.

[0018] The beneficial effects of this invention are that, by adding a clamping and locking device, an intermediate bracket, an anti-tilting structure, and a side-tipping structure, the stability of the upper layer of the construction trolley and the entire trolley during construction operations is greatly enhanced. The control method ensures that the clamping and locking device is always locked when the upper layer of the trolley is stopped at any position, thus fully ensuring the safety of construction equipment and personnel. Attached Figure Description

[0019] Figure 1 This is an isometric view of the structure of the present invention.

[0020] Figure 2 This is a rear view of the present invention.

[0021] Figure 3 This is the present invention. Figure 2 Enlarged view of part A in the image.

[0022] Figure 4 This is an isometric schematic diagram of some structures in this invention.

[0023] Figure 5 This is the present invention. Figure 4 Enlarged view of part B in the image.

[0024] Figure 6 This is an isometric view of the clamping and locking device in Embodiment 1 of the present invention.

[0025] Figure 7 This is a schematic front view of the clamping and locking device in Embodiment 1 of the present invention.

[0026] Figure 8 This is an isometric view of the bracket structure in this invention.

[0027] Figure 9 This is the present invention. Figure 8 Enlarged view of section C in the image.

[0028] Figure 10 This is an isometric view of the upper structure of the trolley in this invention.

[0029] Figure 11 This is an isometric view of the upper layer of the trolley in this invention from another perspective.

[0030] Figure 12This is a schematic front view of the clamping and locking device in Embodiment 2 of the present invention.

[0031] Figure 13 This is a schematic front view of the clamping and locking device in Embodiment 3 of the present invention.

[0032] The above figures also illustrate the control method of the tunnel construction trolley of the present invention. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings, but this does not limit the invention to the scope of the embodiments described.

[0034] Example 1, see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 A tunnel construction trolley with a locking device has a double-layer trolley structure, including a lower trolley 100 and an upper trolley 200 that is telescopically and movably mounted on the lower trolley 100. The lower trolley 100 is equipped with trolley wheels 400 at its bottom end for overall trolley movement. The lower trolley 100 is equipped with a clamping and locking device 110, which clamps and locks the longitudinal fixing members on the upper trolley 200 by moving two opposing clamping blocks toward each other.

[0035] Both clamping blocks are L-shaped, and their horizontal sections provide support for the upper layer of the trolley. The two clamping blocks 111 are movably mounted on the base 113 via side rails 113a, and the base 113 is fixed to the lower layer 100 of the trolley. Each clamping block is driven to move by a locking cylinder 112; specifically, each clamping block 111 is connected to a locking cylinder 112, which is fixed to either the base 113 or the lower layer 100 of the trolley. The upper layer 200 has at least two first legs 210 at its front end. The lower layer 100 also has a telescopically movable bracket 300 that extends in the direction of the upper layer 200's extension, and its front end has two second legs 310. The upper layer 200 is simultaneously supported by the lower layer 100 and the bracket 300. Both the first legs 210 and the second legs 310 are hydraulically supported. The lower trolley 100 and the bracket 300 are equipped with a first hydraulic cylinder 1. A connecting component 2, consisting of a second hydraulic cylinder, is provided between the bracket 300 and the upper trolley 200. The bracket 300 is fixedly connected in a "π" shape by a crossbeam 301 and two longitudinal beams 302, with the two longitudinal beams 302 forming two first guide rails for the telescopic movement of the bracket 300. A first support roller 101 is provided on the lower trolley 100, forming a rolling guide rail pair structure with the first guide rails. A flange is provided at one end of the longitudinal beam 302, and it is fixedly connected to the crossbeam 301 by bolts through the flange. A second support leg 310 is provided on the crossbeam 301. Both the crossbeam 301 and the longitudinal beam 302 are made of rectangular or square tubing, and both ends are equipped with sealing plates to block the pipe holes.

[0036] In addition, the lower layer 100 of the trolley is equipped with a plurality of first limiting rollers 102 located above and on the side of the first guide rail. The upper trolley 200 is equipped with two second guide rails 3 and two anti-tipping limiting beams 4, which are arranged in parallel. The lower trolley 100 is equipped with second support rollers 103 and second limiting rollers 104. The second support rollers 103 support the second guide rails 3. The second support rollers 103 and the second guide rails 3 form a rolling guide rail pair structure. The second limiting rollers 104 are located above and to the side of the anti-tipping limiting beams 4. The crossbeam 301 at the front end of the bracket 300 is also equipped with second limiting rollers 104 located above and to the side of the anti-tipping limiting beams 4. The longitudinal fixing component is composed of the second guide rails 3 or the anti-tipping limiting beams 4, so as to keep the upper trolley 200 in a stable position when extended or retracted by means of the second guide rails 3 or the anti-tipping limiting beams 4. Specifically, it is locked by the second guide rails 3, and two clamping locking devices 110 are provided in the length direction of each second guide rail 3.

[0037] In this implementation, an arch frame lifting device is installed on the upper level 200 of the trolley, thus forming a comprehensive working trolley for tunnel excavation and arch frame installation. Multiple arch frame carrying trolleys 220 are movably installed on the two lifting beams 210 of the arch frame lifting device. Both ends of the lifting beams 210 are connected to the arch frame lifting cylinders 230. The front arch frame lifting cylinder 230 is fixedly connected to the crossbeam 301, and the rear arch frame lifting cylinder 230 is located below the working platform of the upper level 200 of the trolley and passes through the corresponding working platform.

[0038] In this embodiment, two working platforms are provided on both sides of the upper trolley 200 and the lower trolley 100, and an intermediate platform protrudes from the middle of the upper trolley 200. Laterally extending arch-frame positioning beams 300 are provided on the outer sides of the working platforms. These arch-frame positioning beams 300 are connected to side-extension hydraulic cylinders 310, which are fixed to the trolley frame below the working platforms. During tunnel face excavation, the arch-frame positioning beams 300 retract close to the edge of the working platform, allowing the trolley to get closer to the tunnel face. During arch frame installation, the arch-frame positioning beams 300 extend horizontally outward, abutting against the inner side of the arch frame, adjusting the left and right positions of the arch frame and maintaining its stability.

[0039] The trolley in this embodiment can also be a three-layer structure, wherein the upper layer 200 is the top layer of the trolley, and the middle layer is the lower layer of the trolley; when the upper layer 200 is the middle layer, the bottom layer is the lower layer of the trolley. Brackets and related structures can be installed between adjacent upper and lower layers.

[0040] In this embodiment, the first leg 210 and the second leg 310 can be selected to be three or more depending on the support capacity of the legs and the size of the trolley.

[0041] Example 2, see Figure 12 The two clamping blocks 111 of the clamping and locking device 110 are driven to move by the screw rod 114 through the screw rod and nut pair structure. Specifically, a nut 115 is integrally formed or fixedly connected to each of the two clamping blocks 111. The two nuts 115 have opposite helical directions and are screwed onto the two opposite helical threaded sections of the screw rod 114. One end of the screw rod 114 is fixedly connected to the output shaft of the drive motor 116. The drive motor 116 is fixed on the base 113 or the lower layer 100 of the trolley. The drive motor 116 is composed of an electric motor or a hydraulic motor.

[0042] The clamping block 111 is located on one side of the base 113, and the nut 115 is located on the other side. The base 113 has a hollow section for the nut and clamping block to pass through. A guide rail pair structure is formed between the clamping block 111 and the base 113, or between the nut 115 and the base 113, so that the rigid integrated structure of the clamping block 111 and the nut can be quickly and easily moved to connect with the base 113. A bidirectional lead screw 114 is rotatably mounted on the base 113 via a lead screw seat 114a, and the bidirectional lead screw 114 is also coaxially connected to the output shaft of the drive motor 116 via a coupling 114b.

[0043] The remaining structure of this embodiment is the same as that of Embodiment 1, and will not be described again here.

[0044] Example 3, see Figure 13 The clamping and locking device 110 has two clamping blocks forming a floating clamping structure, which is driven to move by a locking cylinder 112. Specifically, the two clamping blocks consist of a first clamping block 111a and a second clamping block 111b. The second clamping block 111b is integrally formed or fixedly connected to the slider 119. The first clamping block 111a is movably mounted on the slider 119 and is connected to the locking cylinder 112, which is fixed to the slider 119. The slider 119 is movably mounted on the base 113, and a return spring 118 is provided between the base 113 and the slider 119. Here, "movably mounted" means that the other degrees of freedom of the moving component are restricted by the guide rail pair structure, and it only has two degrees of freedom: reciprocating movement. The base 113 and the slider 119 can form a guide rail pair structure through the guide pin 120, or the movable function can be realized through the guide rail pair structure of the common structure form; when the guide pin 120 is used, the return spring 118 is a compression spring and is sleeved on the guide pin 120.

[0045] The remaining structure of this embodiment is the same as that of Embodiment 1, and will not be described again here.

[0046] In this embodiment, when the clamping and locking device 110 needs to clamp and fix the longitudinal fixing member, the locking process of the clamping and locking device 110 is as follows: the piston rod of the locking cylinder 112 extends, pushes the first clamping block 111a to move, and after it forms abutment contact with the longitudinal fixing member, as the piston rod continues to extend, under the action of the counter-thrust, the second clamping block 111b and the slider 119 slide together on the base 113. The slider 119 compresses the return spring 118, so that the second clamping block 111b gradually approaches from the other side of the longitudinal fixing member, thereby clamping and fixing the longitudinal fixing member. The clamping and locking device 110 forms a locked state, locking the longitudinal position of the upper layer 200 of the trolley. When the upper level 200 of the trolley needs to move, the unlocking process of the clamping locking device 110 is as follows: the piston rod of the locking cylinder 112 retracts, the slider 119 slides in the opposite direction under the elastic force of the compression return spring 118, the second clamping block 111b retracts synchronously and separates from the longitudinal fixing component, and at the same time, pushes the first clamping block 111a to continuously abut against the longitudinal fixing component until the slider 119 moves to the maximum stroke. Then, the first clamping block 111a continues to retract with the piston rod, thereby separating from the longitudinal fixing component, releasing the longitudinal fixing component to achieve the unlocked state, so that the upper level 200 of the trolley can move longitudinally and change its longitudinal position.

[0047] Example 4, combined with Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 A control method for a tunnel construction trolley, used to control a tunnel construction trolley with a locking device; including linking the clamping locking device 110 with the upper layer 200 of the trolley, and unlocking the clamping locking device 110 before the upper layer 200 of the trolley moves telescopically, and locking the clamping locking device 110 after the upper layer 200 of the trolley stops at any position.

[0048] This method can be implemented using simple industrial control technology, such as PLC control. Movement of the upper carriage 200 can be initiated via a delayed start method. During the delay, the clamping and locking device 110 is unlocked to ensure that the upper carriage 200 moves only after the clamping and locking device 110 is unlocked. After the upper carriage 200 stops at any position, the control system, upon receiving a stop signal from the upper carriage 200, then activates the clamping and locking device 110 to perform the locking action. The stop signal can be a detection signal from a displacement sensor, speed sensor, or pressure sensor. The displacement sensor detects the position of the upper carriage 200 or the position of the corresponding mechanical component, such as the piston rod of a hydraulic cylinder after extension or retraction; the speed sensor detects the moving speed of the upper carriage 200 or the extension / retraction speed of the corresponding mechanical component, such as the piston rod of a hydraulic cylinder; the pressure sensor detects the oil or air pressure of the driving cylinder or pneumatic cylinder that drives the upper carriage 200.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A tunnel construction trolley with a locking device, comprising a lower trolley layer (100) and an upper trolley layer (200) retractably and movably mounted on the lower trolley layer (100); characterized in that, The lower layer (100) of the trolley is provided with a clamping and locking device (110). The clamping and locking device (110) clamps and fixes the longitudinal fixing component on the upper layer (200) of the trolley by moving two oppositely arranged clamping blocks towards each other. The upper trolley (200) is provided with at least two first legs (210) at its front end; the lower trolley (100) is also provided with a bracket (300) which is telescopically movable via a first hydraulic cylinder (1). The bracket (300) can extend in the extension direction of the upper trolley (200), and the front end of the bracket (300) is provided with at least two second legs (310); the upper trolley (200) is supported on both the lower trolley (100) and the bracket (300), and a connecting member (2) is provided between the bracket (300) and the upper trolley (200). The bracket (300) is fixedly connected by a crossbeam (301) and two longitudinal beams (302) to form a "π"-shaped structure. The two longitudinal beams (302) constitute the two first guide rails for the telescopic movement of the bracket (300). The lower layer (100) of the trolley is provided with a first support roller (101), which forms a rolling guide rail pair structure with the first guide rail. The lower layer (100) of the trolley is also provided with a plurality of first limiting rollers (102) located above and on the side of the first guide rail. The second support leg (310) is provided on the crossbeam (301). The upper layer (200) of the trolley is provided with two second guide rails (3) and two anti-rollover limiting beams (4), and the second guide rails (3) and anti-rollover limiting beams (4) are arranged in parallel; the lower layer (100) of the trolley is provided with a second support roller (103) and a second limiting roller (104), and the second support roller (103) forms a support for the second guide rail (3); the second limiting roller (104) is located above and to the side of the anti-rollover limiting beam (4); the front end of the bracket (300) is also provided with a second limiting roller (104) located above and to the side of the anti-rollover limiting beam (4); the longitudinal fixing member is composed of the second guide rail (3) or the anti-rollover limiting beam (4).

2. The tunnel construction trolley with a locking device according to claim 1, characterized in that, Both clamping blocks are L-shaped and form support for the upper layer (200) of the trolley through the horizontal section of the L-shape.

3. The tunnel construction trolley with a locking device according to claim 1 or 2, characterized in that, Both clamping blocks are movably mounted on the base (113), which is fixed on the lower layer (100) of the trolley; the two clamping blocks are driven to move by a locking cylinder (112); or, the two clamping blocks are driven to move by a two-way screw (114) through a screw and nut pair structure; or, the two clamping blocks form a floating clamping structure and are driven to move by a locking cylinder (112).

4. The tunnel construction trolley with a locking device according to claim 3, characterized in that, In a structure where the two clamping blocks are driven to move by a locking cylinder (112) respectively, the two clamping blocks are each connected to a locking cylinder (112), and the locking cylinder (112) is fixed on the base (113) or the lower layer of the trolley (100); in a structure where the two clamping blocks are driven to move by a screw rod and nut pair structure via a bidirectional screw rod (114), a nut (115) is integrally formed or fixedly connected to each of the two clamping blocks, the two nuts (115) have opposite helical directions and are respectively screwed onto the two opposite helical thread sections of the bidirectional screw rod (114), one end of the bidirectional screw rod (114) is fixedly connected to the output shaft of the drive motor (116), and the drive motor (116) is fixed on the base (113) or the lower layer of the trolley (100); In the structure, the drive motor (116) is composed of an electric motor or a hydraulic motor; in the structure in which two clamping blocks form a floating clamping structure and are driven to move by a locking cylinder (112), the two clamping blocks are composed of a first clamping block (111a) and a second clamping block (111b). The second clamping block (111b) is integrally formed or fixedly connected to the slider (119). The first clamping block (111a) is movably disposed on the slider (119). The first clamping block (111a) is connected to the locking cylinder (112). The locking cylinder (112) is fixed on the slider (119). The slider (119) is only movably disposed on the base (113), and a return spring (118) is provided between the base (113) and the slider (119).

5. The tunnel construction trolley with a locking device according to claim 1, characterized in that, The connecting component (2) is composed of a second hydraulic cylinder.

6. The tunnel construction trolley with a locking device according to claim 1, characterized in that, The longitudinal beam (302) is provided with a flange at one end, and is fixedly connected to the cross beam (301) by bolts through the flange.

7. A control method for a tunnel construction trolley, characterized in that, For controlling the tunnel construction trolley with locking device as described in any one of claims 1-6; including forming a linkage between the clamping locking device (110) and the upper layer (200) of the trolley, and unlocking the clamping locking device (110) before the upper layer (200) of the trolley moves forward and backward, and locking the clamping locking device (110) after the upper layer (200) of the trolley stops at any position.

Images