Lifting device for tunnel side wall construction trolley

Abstract

The invention discloses a lifting device for a tunnel side wall construction trolley, and relates to the technical field of trolley lifting devices. Comprising a bottom support, a bottom support, a lifting mechanism, a driving device, a sliding main rod and an anti-falling protection device, and can run under the condition of power failure on a construction site, active triggering is not needed, and the passive safety of the lifting device is improved. The displacement motion of the anti-falling protection device during falling is utilized to drive a rotating gear to rotate, the rotating gear drives a clamping protection device to slide through a transmission gear, so that a clamping spring is lengthened, and when a clamping strip slides to a clamping groove along with a lifting box falling at a reduced speed, the clamping strip automatically stretches out and is embedded into the clamping groove, so that the clamping strip is prevented from falling off. And the anti-falling protection device cannot continue to slide downwards, so that the lifting box body is prevented from falling, and the lifting device is stopped. Friction rotating plates rotate to be close to and attached to the surface of the sliding main rod, friction force generated by the friction rotating plates and the sliding main rod is utilized, the falling speed of the lifting box is reduced, and harm to workers during falling is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of trolley lifting devices, in particular to a lifting device for a tunnel side wall construction trolley. Background Art

[0002] The tunnel masonry trolley is a key special equipment in tunnel construction, mainly used for concrete lining operations on the inner wall of the tunnel. It significantly improves construction efficiency and reduces manual dependence and labor intensity through automated walking and hydraulic positioning technology. At the same time, the equipment ensures the accuracy and construction quality of the lining, reduces human errors, and improves the stability and safety of the project. Tunnel masonry trolleys are available in various types to meet construction needs of different complexities, and the structural design is flexible and easy to adjust. Although the initial investment is large, the improvement in construction efficiency, cost savings and long-term benefits it brings are obvious, and it is an indispensable and important tool in modern tunnel construction.

[0003] However, traditional trolleys require workers to climb stairs to enter the top working platform to work. This method not only consumes physical strength, but also reduces construction efficiency. Although some trolleys are equipped with lifting devices, traditional lifting devices are difficult to ensure the safety of workers in complex tunnel working environments. In particular, during engineering operations, due to insufficient power supply, overload or accidental power outages, the lifting device is prone to fall, causing losses to the project and workers; and some trolleys use traditional elevator-type lifting devices. Although such devices have a certain anti-falling effect, they are large in size and weight, which will reduce the trolley's operating space and reduce convenience. Summary of the invention

[0004] The object of the present invention is to provide a lifting device for a tunnel side wall construction trolley to solve the problems raised in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a lifting device for a tunnel side wall construction trolley, comprising a bottom support, the bottom support is installed on the trolley, a sliding main rod is installed on the bottom support, the sliding main rod is provided with a sliding groove running through from top to bottom, a plurality of tooth grooves are provided in the sliding groove, a plurality of card grooves are evenly provided on the sliding main rod, a lifting mechanism is slidably installed on the sliding main rod, an anti-falling protection device is installed at the bottom end of the lifting device, the anti-falling protection device is meshed with the sliding main rod for transmission, a bottom bracket is installed at the bottom end of the sliding main rod, a driving device is installed at the top end of the sliding main rod, and the driving device is connected to the top end of the lifting mechanism through a rope.

[0006] A control system is provided in the lifting device, which is used to control the entire lifting device and can automatically cut off the power supply of the anti-fall protection device when the lifting mechanism falls. A detection chip is installed in the lifting device to detect whether the lifting device falls and send the electrical signal generated during the fall to the control system.

[0007] Under normal conditions, the control system turns on the drive device to drive the rope to extend and retract, and uses the rope extension and retraction to drive the lifting box to move up and down along the sliding main rod. The staff rides on the lifting box and rises from the ground to the operating platform on the top of the trolley.

[0008] The lifting mechanism includes a lifting box, the top of the lifting box is connected to the driving device through a rope, a sliding block is provided on the lifting box, the lifting box is slidably connected to the sliding main rod through the sliding block, a connecting tube is provided on the lifting box, a connecting block is installed at the bottom of the lifting box, a number of anti-fall protection devices are installed on the connecting block, a slide is installed on the connecting block, the slide is connected to the bottom of the lifting box, and the anti-fall protection device is slidably connected to the slide.

[0009] The lifting mechanism also includes a rotating rod, which is rotatably connected to the lifting box through a connecting tube, a friction rotating plate is installed on the rotating rod, and a first bevel gear is installed at the bottom end of the rotating rod, and the first bevel gear is meshed with the anti-fall protection device for transmission.

[0010] The side of the friction rotating plate close to the sliding main rod is made of a high friction coefficient material for generating friction with the sliding main rod; the friction rotating plate is connected to the rotating rod through a torsion spring. In the normal state, the friction rotating plate does not contact the surface of the sliding main rod.

[0011] The anti-fall protection device includes an electric telescopic rod, one end of which is installed on the connecting block, a fixing component is installed on the output shaft of the electric telescopic rod, a protection spring is installed between the fixing component and the electric telescopic rod, connecting plates are symmetrically installed on the electric telescopic rod, a clamping block is installed on the connecting plate, the fixing component is engaged with the clamping block, and a clamping connector is installed at one end of the output shaft of the electric telescopic rod.

[0012] In the normal state, the electromagnet is energized to generate magnetic force, and the electromagnet absorbs the fixed sliding rods on both sides. The fixed sliding rod drives the fixed head to overcome the elastic force of the fixed spring and slide, so that the fixed head slides into the fixed shell. At this time, the fixed component and the positioning block are disengaged, and the output shaft of the electric telescopic rod retracts a short distance. The output shaft of the electric telescopic rod drives the rotating gear and the second bevel gear to retract through the positioning connector, so that the rotating gear and the sliding main rod are disengaged from the meshing transmission relationship. At the same time, the second bevel gear and the first bevel gear are also disengaged from the meshing transmission relationship.

[0013] When sudden power outages or rope breakage occur at the construction site, the electric telescopic rod loses control of its output rod after power failure, and the compressed protection spring rebounds and recovers, driving the output shaft of the electric telescopic rod to extend through the fixed housing. When the fixed component extends to the position of the blocking block along with the output shaft of the electric telescopic rod, the electromagnet is powered off, and the adsorption of the fixed sliding rod is disconnected, so that the fixed head quickly pops out of the fixed housing under the elastic force of the fixed spring and engages with the blocking block, so that the output shaft of the electric telescopic rod cannot slide. At this time, the second bevel gear and the rotating gear are respectively meshed with the first bevel gear and the sliding main rod for transmission.

[0014] The anti-fall protection device also includes a transmission rod, which passes through the locking connector. A rotating gear is installed on the transmission rod. Second bevel gears are installed at both ends of the transmission rod. The second bevel gear is meshed with the first bevel gear for transmission. A transmission gear is rotatably installed on the locking connector. The transmission gear is meshed with the rotating gear for transmission. A locking protection device is slidably installed on the locking connector. The locking protection device is meshed with the transmission gear for transmission.

[0015] The fixed component includes a fixed shell, which is installed on the output shaft of the electric telescopic rod. A first positioning plate is symmetrically installed in the fixed shell, a second positioning plate is installed in the fixed shell, the second positioning plate is located between the first positioning plates, a fixed head is symmetrically and slidably installed in the fixed shell, a fixed slide rod is installed on the fixed head, the fixed slide rod passes through the first positioning plate, a fixed spring is installed between the fixed head and the first positioning plate, an electromagnet is installed on the second positioning plate, the fixed head is engaged with the positioning block, and a protective spring is installed between the fixed shell and the electric telescopic rod.

[0016] The blocking protection device includes a blocking slider, which is meshed with a transmission gear for transmission, and is slidably mounted on a blocking connector, on which a blocking slide bar is slidably mounted, and a clamping strip is mounted at one end of the blocking slide bar, and a blocking spring is mounted between the blocking slide bar and the blocking slider. Under normal conditions, the blocking spring is in a contracted state.

[0017] The fall of the lifting box drives the anti-fall protection device to fall, and the locking connector drives the rotating gear downward. Due to the meshing transmission between the rotating gear and the tooth groove on the sliding main rod, the tooth groove causes the transmission gear to rotate while descending, and the rotating gear drives the second bevel gear to rotate through the transmission rod, and the second bevel gear drives the first bevel gear to rotate, and the first bevel gear drives the rotating rod to rotate, and the rotating rod drives the friction rotating plate to rotate. The friction rotating plates on both sides of each sliding main rod rotate and move closer until they fit with the surface of the sliding main rod. The friction rotating plates fit tightly against the surface of the sliding main rod to generate friction, and the friction force increases as the friction rotating plates are further retracted. The friction force of multiple groups of friction rotating plates reduces the falling speed of the lifting box, thereby reducing the damage to the staff during the fall.

[0018] The rotating gear includes a gear ring, which is installed on a transmission rod. A plurality of sliding gear teeth are slidably installed on the gear ring. A gear gear slide bar is installed on the sliding gear teeth. The gear gear slide bar is slidably connected to the gear ring. A sliding spring is installed between the sliding gear teeth and the gear ring. Side covers are installed on both sides of the gear ring. The gear ring is meshed with the transmission gear through the sliding gear teeth, and the gear ring is meshed with the tooth groove through the sliding gear teeth.

[0019] The gear ring is provided with a sliding hole for the gear sliding rod to slide, and the gear sliding rod is used to improve the sliding stability of the sliding gear teeth.

[0020] When the locking bar is in the locked position, the locking bar is pulled back and the locking bar is pressed against the locking bar, and the locking bar is pressed against the locking bar.

[0021] When the lifting box is descending, the connecting strip cannot be embedded in the nearest slot in the first time. The rotating gear rotates continuously under the action of the tooth groove during the descent. The connecting strip is pressed against the sliding main rod, so that the positioning slider cannot move. The positioning slider prevents the rotating gear from rotating through the transmission gear. In order to prevent the rotating gear and other components from being damaged and the anti-fall protection device from failing, the sliding gear teeth will slide along the tooth groove inclined surface or the transmission gear inclined surface when the force is too large. The sliding gear teeth compress the sliding spring and shrink into the gear ring, thereby breaking the contact with the tooth groove and the transmission gear. When the sliding gear teeth turn away from the tooth groove or the transmission gear, they rebound and extend under the action of the sliding spring to avoid the sliding gear teeth from being damaged due to excessive force. This cycle is repeated until the connecting strip is engaged with the locking groove, thereby realizing the self-protection of the rotating gear.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. When the power is off, the protective spring rebounds and restores, and drives the output shaft of the electric telescopic rod to extend through the fixed housing. When the fixed component extends to the position of the blocking block along with the output shaft of the electric telescopic rod, the electromagnet is powered off, and the adsorption of the fixed slide bar is disconnected, so that the fixed head and the blocking block are engaged, so that the output shaft of the electric telescopic rod cannot slide. It can operate when the power is off at the construction site without active triggering, which improves the passive safety of the lifting device.

[0024] 2. The displacement movement of the anti-fall protection device when it falls is used to drive the rotating gear to rotate. The rotating gear drives the locking protection device to slide through the transmission gear, so that the locking spring is stretched. When the locking strip slides to the slot position with the decelerated falling lifting box, the locking strip automatically extends and embeds into the slot, so that the anti-fall protection device cannot continue to slide downward, thereby preventing the lifting box from falling and stopping the lifting device.

[0025] 3. The rotating gear drives the second bevel gear to drive the first bevel gear to rotate through the transmission gear. The first bevel gear drives the friction rotating plate to rotate through the rotating rod. The friction rotating plate rotates close to and fits on the surface of the sliding main rod. The friction force generated by the two is used to reduce the falling speed of the lifting box and reduce the damage to the staff during the fall.

[0026] 4. When the sliding gear teeth on the rotating gear are subjected to excessive force, the sliding gear teeth will slide along the inclined surface of the tooth groove or the inclined surface of the transmission gear and shrink into the gear ring, thereby breaking the contact with the tooth groove and the transmission gear, avoiding damage to the rotating gear and other components that would render the anti-fall protection device ineffective, thereby achieving self-protection of the rotating gear.

[0027] 5. The lifting box only needs to be driven by ropes, making the lifting device lighter, saving a lot of operating space for the trolley and facilitating installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is an overall elevation view of the lifting device of the present invention;

[0029] Figure 2 is an elevation view of the lifting device of the present invention;

[0030] Figure 3 It is an elevation view of the lifting mechanism of the present invention;

[0031] Figure 4 It is an elevation view of the lifting mechanism of the present invention;

[0032] Figure 5 It is an elevation view of the anti-fall protection device of the present invention;

[0033] Figure 6 For the present invention Figure 5 A partial enlarged view of the middle A area;

[0034] Figure 7 For the present invention Figure 5 A partial enlarged view of the middle B area;

[0035] Figure 8 It is an elevation view of the sliding main rod of the present invention.

[0036] In the figure: 1, bottom support; 2, bottom support; 3, lifting mechanism; 4, driving device; 5, sliding main rod; 6, anti-fall protection device; 31, lifting box; 32, slideway; 33, friction rotating plate; 34, sliding block; 35, connecting cylinder; 36, first bevel gear; 37, rotating rod; 38, connecting block; 51, slide groove; 52, tooth groove; 53, clamping groove; 61, electric telescopic rod; 62, protection spring; 63, connecting plate; 64, clamping protection device; 65, rotating gear; 66, transmission rod; 67, second bevel gear Gear; 68, latching connector; 69, fixing assembly; 610, transmission gear; 611, latching block; 691, fixed housing; 692, fixed head; 693, fixed spring; 694, electromagnet; 695, fixed slide bar; 651, sliding gear; 652, gear slide bar; 653, sliding spring; 654, gear ring; 655, side cover; 696, first positioning plate; 697, second positioning plate; 641, latching strip; 642, latching slide bar; 643, latching spring; 644, latching slide bar. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] like Figure 1-8 As shown, the present invention provides a technical solution for a lifting device for a tunnel side wall construction trolley: it includes a bottom support 1, the bottom support 1 is installed on the trolley, a sliding main rod 5 is installed on the bottom support 1, the sliding main rod 5 is provided with a slide groove 51 running through from top to bottom, a plurality of tooth grooves 52 are provided in the slide groove 51, a plurality of card grooves 53 are evenly provided on the sliding main rod 5, a lifting mechanism 3 is slidably installed on the sliding main rod 5, an anti-falling protection device 6 is installed at the bottom end of the lifting device, the anti-falling protection device 6 is meshed with the sliding main rod 5 for transmission, a bottom bracket 2 is installed at the bottom end of the sliding main rod 5, a driving device 4 is installed at the top of the sliding main rod 5, and the driving device 4 is connected to the top of the lifting mechanism 3 through a rope.

[0039] A control system is provided in the lifting device, which is used to control the entire lifting device and can automatically cut off the power supply of the anti-fall protection device 6 when the lifting mechanism 3 falls. A detection chip is installed in the lifting device to detect whether the lifting device falls and send the electrical signal generated during the fall to the control system.

[0040] The lifting mechanism 3 includes a lifting box 31, the top of which is connected to the driving device 4 through a rope, a sliding block 34 is provided on the lifting box 31, and the lifting box 31 is slidably connected to the sliding main rod 5 through the sliding block 34, a connecting tube 35 is provided on the lifting box 31, a connecting block 38 is installed at the bottom end of the lifting box 31, a plurality of anti-fall protection devices 6 are installed on the connecting block 38, a slide 32 is installed on the connecting block 38, the slide 32 is connected to the bottom end of the lifting box 31, and the anti-fall protection device 6 is slidably connected to the slide 32.

[0041] The lifting mechanism 3 also includes a rotating rod 37, which is rotatably connected to the lifting box 31 through a connecting tube 35. A friction rotating plate 33 is installed on the rotating rod 37. A first bevel gear 36 is installed at the bottom end of the rotating rod 37. The first bevel gear 36 is meshed with the anti-fall protection device 6 for transmission.

[0042] The side of the friction rotating plate 33 close to the sliding main rod 5 is made of a material with a high friction coefficient, which is used to generate friction with the sliding main rod 5; the friction rotating plate 33 is connected to the rotating rod 37 through a torsion spring. In the normal state, the friction rotating plate 33 does not contact the surface of the sliding main rod 5.

[0043] The anti-fall protection device 6 includes an electric telescopic rod 61, one end of which is installed on the connecting block 38, a fixing component 69 is installed on the output shaft of the electric telescopic rod 61, a protection spring 62 is installed between the fixing component 69 and the electric telescopic rod 61, a connecting plate 63 is symmetrically installed on the electric telescopic rod 61, a locking block 611 is installed on the connecting plate 63, the fixing component 69 is engaged with the locking block 611, and a locking connector 68 is installed at one end of the output shaft of the electric telescopic rod 61.

[0044] In the normal state, the electromagnet 694 is energized to generate magnetic force, and the electromagnet 694 adsorbs the fixed slide bars 695 on both sides. The fixed slide bars 695 drive the fixed head 692 to slide to overcome the elastic force of the fixed spring 693, so that the fixed head 692 slides into the fixed shell 691. At this time, the fixed component 69 and the positioning block 611 are disengaged, and the output shaft of the electric telescopic rod 61 retracts a short distance. The output shaft of the electric telescopic rod 61 drives the rotating gear 65 and the second bevel gear 67 to retract through the positioning connector 68, so that the rotating gear 65 and the sliding main rod 5 are disengaged from the meshing transmission relationship. At the same time, the second bevel gear 67 and the first bevel gear 36 are also disengaged from the meshing transmission relationship.

[0045] The anti-fall protection device 6 also includes a transmission rod 66, which passes through the locking connector 68. A rotating gear 65 is installed on the transmission rod 66. Second bevel gears 67 are installed at both ends of the transmission rod 66. The second bevel gear 67 is meshed with the first bevel gear 36 for transmission. A transmission gear 610 is rotatably installed on the locking connector 68. The transmission gear 610 is meshed with the rotating gear 65 for transmission. A locking protection device 64 is slidably installed on the locking connector 68. The locking protection device 64 is meshed with the transmission gear 610 for transmission.

[0046] The fixed assembly 69 includes a fixed shell 691, which is installed on the output shaft of the electric telescopic rod 61. A first positioning plate 696 is symmetrically installed in the fixed shell 691, a second positioning plate 697 is installed in the fixed shell 691, and the second positioning plate 697 is located between the first positioning plates 696. A fixed head 692 is symmetrically and slidably installed in the fixed shell 691, a fixed slide bar 695 is installed on the fixed head 692, and the fixed slide bar 695 passes through the first positioning plate 696. A fixed spring 693 is installed between the fixed head 692 and the first positioning plate 696, an electromagnet 694 is installed on the second positioning plate 697, the fixed head 692 is engaged with the positioning block 611, and a protective spring 62 is installed between the fixed shell 691 and the electric telescopic rod 61.

[0047] The locking protection device 64 includes a locking slider 642, which is meshed with the transmission gear 610 for transmission, and is slidably mounted on the locking connector 68. A locking slide bar 644 is slidably mounted on the locking slider 642, and a clamping strip 641 is mounted at one end of the locking slide bar 644. A locking spring 643 is mounted between the locking slide bar 644 and the locking slider 642. In a normal state, the locking spring 643 is in a contracted state.

[0048] The rotating gear 65 includes a gear ring 654, which is installed on the transmission rod 66. A plurality of sliding gear teeth 651 are slidably installed on the gear ring 654. A gear gear slide bar 652 is installed on the sliding gear teeth 651. The gear gear slide bar 652 is slidably connected to the gear ring 654. A sliding spring 653 is installed between the sliding gear teeth 651 and the gear ring 654. Side covers 655 are installed on both sides of the gear ring 654. The gear ring 654 is meshed with the transmission gear 610 for transmission through the sliding gear teeth 651, and the gear ring 654 is meshed with the tooth groove 52 for transmission through the sliding gear teeth 651.

[0049] The gear ring 654 is provided with a sliding hole for the gear sliding rod 652 to slide, and the gear sliding rod 652 is used to improve the sliding stability of the sliding gear 651.

[0050] The working principle of the present invention is as follows: Under normal conditions, the control system drives the rope to be extended and retracted by turning on the driving device 4, and the rope extension and retraction are used to drive the lifting box 31 to rise and fall along the sliding main rod 5. The staff rides on the lifting box 31 and rises from the ground to the operating platform on the top of the trolley.

[0051] When an emergency such as a sudden power outage or a rope break occurs at the construction site, the electric telescopic rod 61 loses control of its output rod after power is cut off, and the compressed protection spring 62 rebounds and recovers, driving the output shaft of the electric telescopic rod 61 to extend through the fixed housing 691. When the fixed component 69 extends to the position of the blocking block 611 along with the output shaft of the electric telescopic rod 61, the electromagnet 694 is powered off, and the fixed slide rod 695 is disconnected from adsorption, so that the fixed head 692 is quickly popped out of the fixed housing 691 under the elastic force of the fixed spring 693, and is engaged with the blocking block 611, so that the output shaft of the electric telescopic rod 61 cannot slide. At this time, the second bevel gear 67 and the rotating gear 65 are respectively engaged with the first bevel gear 36 and the sliding main rod 5 for transmission.

[0052] The fall of the lifting box 31 drives the anti-fall protection device 6 to fall, and the locking connector 68 drives the rotating gear 65 downward. Since the rotating gear 65 is meshed with the tooth groove 52 on the sliding main rod 5 for transmission, the tooth groove 52 causes the transmission gear 610 to rotate while descending, and the rotating gear 65 drives the second bevel gear 67 to rotate through the transmission rod 66, and the second bevel gear 67 drives the first bevel gear 36 to rotate, and the first bevel gear 36 drives the rotating rod 37 to rotate, and the rotating rod 37 drives the friction rotating plate 33 to rotate, and the friction rotating plates 33 on both sides of each sliding main rod 5 rotate and move closer until they fit with the surface of the sliding main rod 5. The friction rotating plates 33 are tightly fitted on the surface of the sliding main rod 5 to generate friction, and the friction force increases as the friction rotating plates 33 are further retracted. The friction force of multiple groups of friction rotating plates 33 is used to reduce the falling speed of the lifting box 31, thereby reducing the damage to the staff during the fall.

[0053] When the rotating gear 65 drives the second bevel gear 67 to rotate, the locking protection device 64 is synchronously driven to slide through the transmission gear 610, and the locking slider 642 slides in the locking connector 68, and drives the locking strip 641 to extend through the locking slide rod 644, and the locking strip 641 supports the sliding main rod 5. At this time, as the locking slider 642 slides further, a relative displacement occurs between the sliding main rod 5 and the locking slider 642, so that the locking spring 643 is stretched. When the locking strip 641 falls with the deceleration, When the lifting box 31 slides to the position of the slot 53, under the action of the tension of the locking spring 643, the locking slide bar 644 drives the locking strip 641 to slide, and the locking strip 641 is embedded in the slot 53. After the locking strip 641 is engaged with the slot 53, the anti-fall protection device 6 cannot continue to slide downward, and the protection device is prevented from supporting the lifting box 31 from the bottom, thereby preventing the lifting box 31 from falling and stopping the lifting device. The control system sends a rescue signal to the ground command center, so that the staff can be rescued;

[0054] When the lifting box 31 is descending, the clamping strip 641 cannot be inserted into the nearest clamping groove 53 in the first time. The rotating gear 65 rotates continuously under the action of the tooth groove 52 during the descent process. The clamping strip 641 is pressed against the sliding main rod 5, so that the blocking slider 642 cannot move. The blocking slider 642 prevents the rotating gear 65 from rotating through the transmission gear 610. In order to prevent the rotating gear 65 and other components from being damaged and causing the anti-fall protection device 6 to fail, the sliding gear teeth 651 are subjected to excessive force. , it will slide along the inclined surface of the tooth groove 52 or the inclined surface of the transmission gear 610, and the sliding gear tooth 651 compresses the sliding spring 653, thereby shrinking into the gear ring 654, thereby breaking the contact with the tooth groove 52 and the transmission gear 610. When the sliding gear tooth 651 rotates away from the tooth groove 52 or the transmission gear 610, it rebounds and extends out under the action of the sliding spring 653, avoiding the sliding gear tooth 651 from being damaged by excessive force, and the cycle continues until the clamping strip 641 is engaged with the clamping groove 53, thereby realizing the self-protection of the rotating gear 65.

[0055] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A lifting device for a tunnel side wall construction trolley, characterized in that: The lifting device comprises a bottom support (1), wherein the bottom support (1) is mounted on a trolley, a sliding main rod (5) is mounted on the bottom support (1), a sliding groove (51) extending vertically therethrough is provided on the sliding main rod (5), a plurality of tooth grooves (52) are provided in the sliding groove (51), a plurality of slots (53) are evenly provided on the sliding main rod (5), a lifting mechanism (3) is slidably mounted on the sliding main rod (5), an anti-falling protection device (6) is mounted at the bottom end of the lifting device, the anti-falling protection device (6) is meshed with the sliding main rod (5) for transmission, a bottom bracket (2) is mounted at the bottom end of the sliding main rod (5), a driving device (4) is mounted at the top end of the sliding main rod (5), and the driving device (4) is connected to the top end of the lifting mechanism (3) through a rope.

2. A lifting device for a tunnel side wall construction trolley according to claim 1, characterized in that: The lifting mechanism (3) comprises a lifting box (31), the top of which is connected to a driving device (4) via a rope, a sliding block (34) is provided on the lifting box (31), the lifting box (31) is slidably connected to a sliding main rod (5) via the sliding block (34), a connecting tube (35) is provided on the lifting box (31), a connecting block (38) is installed at the bottom of the lifting box (31), a plurality of anti-falling protection devices (6) are installed on the connecting block (38), a slideway (32) is installed on the connecting block (38), the slideway (32) is connected to the bottom of the lifting box (31), and the anti-falling protection device (6) is slidably connected to the slideway (32).

3. A lifting device for a tunnel side wall construction trolley according to claim 2, characterized in that: The lifting mechanism (3) further comprises a rotating rod (37), the rotating rod (37) being rotatably connected to the lifting box (31) via a connecting tube (35), a friction rotating plate (33) being mounted on the rotating rod (37), a first bevel gear (36) being mounted at the bottom end of the rotating rod (37), and the first bevel gear (36) being meshed with the anti-falling protection device (6) for transmission.

4. A lifting device for a tunnel side wall construction trolley according to claim 3, characterized in that: The anti-fall protection device (6) comprises an electric telescopic rod (61), one end of the electric telescopic rod (61) is mounted on a connecting block (38), a fixing component (69) is mounted on the output shaft of the electric telescopic rod (61), a protection spring (62) is mounted between the fixing component (69) and the electric telescopic rod (61), a connecting plate (63) is symmetrically mounted on the electric telescopic rod (61), a locking block (611) is mounted on the connecting plate (63), the fixing component (69) is engaged with the locking block (611), and a locking connector (68) is mounted on one end of the output shaft of the electric telescopic rod (61).

5. A lifting device for a tunnel side wall construction trolley according to claim 4, characterized in that: The anti-fall protection device (6) further comprises a transmission rod (66), the transmission rod (66) passes through the locking connector (68), a rotating gear (65) is mounted on the transmission rod (66), second bevel gears (67) are mounted at both ends of the transmission rod (66), the second bevel gear (67) is meshed with the first bevel gear (36) for transmission, a transmission gear (610) is rotatably mounted on the locking connector (68), the transmission gear (610) is meshed with the rotating gear (65) for transmission, and a locking protection device (64) is slidably mounted on the locking connector (68), the locking protection device (64) is meshed with the transmission gear (610) for transmission.

6. A lifting device for a tunnel side wall construction trolley according to claim 4, characterized in that: The fixing assembly (69) comprises a fixing housing (691), the fixing housing (691) being mounted on the output shaft of the electric telescopic rod (61), a first positioning plate (696) being symmetrically mounted in the fixing housing (691), a second positioning plate (697) being mounted in the fixing housing (691), the second positioning plate (697) being located between the first positioning plates (696), a fixing head (692) being symmetrically and slidably mounted in the fixing housing (691), and the fixing head (692) being symmetrically and slidably mounted in the fixing housing (691). A fixed slide bar (695) is installed on the fixed head (692), and the fixed slide bar (695) passes through the first positioning plate (696). A fixed spring (693) is installed between the fixed head (692) and the first positioning plate (696). An electromagnet (694) is installed on the second positioning plate (697). The fixed head (692) is engaged with a positioning block (611), and a protective spring (62) is installed between the fixed housing (691) and the electric telescopic rod (61).

7. The lifting device for a tunnel side wall construction trolley according to claim 5, characterized in that: The locking protection device (64) comprises a locking slider (642), the locking slider (642) meshes with the transmission gear (610) for transmission, the locking slider (642) is slidably mounted on the locking connector (68), a locking slide bar (644) is slidably mounted on the locking slider (642), a locking strip (641) is mounted at one end of the locking slide bar (644), and a locking spring (643) is mounted between the locking slide bar (644) and the locking slider (642).

8. The lifting device for a tunnel side wall construction trolley according to claim 5, characterized in that: The rotating gear (65) comprises a gear ring (654), the gear ring (654) is mounted on a transmission rod (66), a plurality of sliding gear teeth (651) are slidably mounted on the gear ring (654), a gear gear sliding rod (652) is mounted on the sliding gear teeth (651), the gear gear sliding rod (652) is slidably connected to the gear ring (654), a sliding spring (653) is mounted between the sliding gear teeth (651) and the gear ring (654), side covers (655) are mounted on both sides of the gear ring (654), the gear ring (654) is meshed with the transmission gear (610) through the sliding gear teeth (651), and the gear ring (654) is meshed with the tooth groove (52) through the sliding gear teeth (651) for transmission.

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