CN217460219U - Four-bar linkage lifting device of trestle approach bridge - Google Patents
Four-bar linkage lifting device of trestle approach bridge Download PDFInfo
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- CN217460219U CN217460219U CN202221510857.4U CN202221510857U CN217460219U CN 217460219 U CN217460219 U CN 217460219U CN 202221510857 U CN202221510857 U CN 202221510857U CN 217460219 U CN217460219 U CN 217460219U
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Abstract
The utility model belongs to the lifting technical field of trestle bridge approach, and discloses a four-bar linkage lifting device of trestle bridge approach, which is used for waiting for excavating earthwork to be positioned at the lower part of a rear approach; the main bridge is fixedly arranged at the upper part of the rear supporting seat, the first fixing lugs are longitudinally and uniformly arranged at the bottom of the right side of the main bridge, the second fixing lugs are longitudinally and uniformly arranged at the left end of the rear approach bridge, the first fixing lugs and the second fixing lugs are provided with through holes, and the main bridge and the rear approach bridge are hinged and fixed into a whole by pin shafts for butting the through holes of the first fixing lugs and the second fixing lugs; the lifting device is fixedly arranged at the right side position of the upper part of the rear supporting seat. The utility model discloses real beneficial effect: 1. the lifting height of the approach bridge is improved, and excavation construction at the lower part of the approach bridge is facilitated. 2. The lifting structure with the four connecting rods can share the weight load of the approach bridge, so that the weight load of the approach bridge is prevented from directly acting on the oil cylinder, the oil leakage condition of the oil cylinder is prevented, and the service life of the oil cylinder is prolonged.
Description
Technical Field
The utility model belongs to the technical field of the lifting of landing stage access, concretely relates to four connecting rod lifting devices of landing stage access.
Background
The trestle is an inverted arch trestle and is mainly applied to excavation engineering construction of tunnels. The inverted arch is a main component of the tunnel structure, and the inverted arch is the foundation of the tunnel structure. The inverted arch trestle is mainly used for construction vehicles and inverted arch trestles through which the excavator walks in the tunnel excavation process. Therefore, the inverted arch trestle has the function of lifting weight in the tunnel excavation construction process and is necessary equipment in the tunnel excavation construction process. The structure of the inverted arch trestle mainly comprises a main bridge, a front approach bridge, a rear approach bridge, a front supporting seat, a travelling mechanism of which the rear supporting seat is arranged on two sides of the main bridge, a hydraulic control mechanism and a lifting mechanism.
In the prior art, a front approach bridge and a front support seat of an inverted arch trestle are placed on the ground of an excavated tunnel, and a rear approach bridge and a rear support seat are placed on the ground of the tunnel without excavation. After the tunnel construction reaches a certain progress, when earthwork at the lower part of the rear approach bridge needs to be excavated, built and poured, for convenience of tunnel excavation construction, the rear approach bridge needs to be lifted, and an excavator is used for excavating the earthwork at the lower part of the rear approach bridge. The main technical problem that exists of lifting mechanism of invert trestle approach among the prior art is: 1. the lifting height of the approach bridge is too low, so that the excavator is inconvenient to excavate and construct at the lower part of the approach bridge; 2. in the prior art, the lifting mechanism of the approach bridge mainly realizes the lifting of the approach bridge through the telescopic action of the oil cylinder, the weight load of the approach bridge directly acts on the oil cylinder, so that the oil cylinder is subjected to the weight load action of the approach bridge for a long time, the oil leakage of the oil cylinder is easy to occur, and the service life of the oil cylinder is shortened. The inventor develops a four-bar linkage lifting device of a trestle approach bridge based on the defects in the prior art, and can well solve the technical problems in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve above-mentioned technical problem, provide a four connecting rod lifting devices of landing stage access, its design simple structure, scientific and reasonable, improved the lifting height to the access, the convenience is in the excavation construction of access lower part, utilizes the lifting structure of four connecting rods to share access weight load simultaneously, has avoided the weight load direct action of access on the hydro-cylinder.
The utility model provides a technical scheme that technical problem adopted is: a four-bar linkage lifting device of a trestle approach comprises earthwork to be excavated, a main bridge and a rear supporting seat; the earthwork to be excavated is positioned at the lower part of the rear approach bridge; the main bridge is fixedly arranged at the upper part of the rear supporting seat, the first fixing lugs are longitudinally and uniformly arranged at the bottom of the right side of the main bridge, the second fixing lugs are longitudinally and uniformly arranged at the left end of the rear approach bridge, through holes are formed in the first fixing lugs and the second fixing lugs, and the main bridge and the rear approach bridge are hinged and fixed into a whole by a pin shaft through the butt joint of the through holes of the first fixing lugs and the second fixing lugs; the lifting device is fixedly arranged at the right side position of the upper part of the rear supporting seat, and is used for lifting and swinging the rear approach bridge; the lifting device comprises a fixed body, the fixed body is fixedly arranged at the lower part of the right end of the main bridge, the upper part of the fixed body is fixedly connected with the bottom of the main bridge, and the left side of the fixed body is fixedly connected with the right side of the upper part of the rear supporting seat; the oil cylinder fixing arm is fixedly arranged at the lower part of the fixing body, an oil cylinder hinge hole is formed in the lower part of the oil cylinder fixing arm, and the left end of the oil cylinder is fixedly connected with the oil cylinder hinge hole through a pin shaft; the first connecting rod is fixedly arranged at the lower position of the right side of the fixed body, the second connecting rod is hinged and fixed at the lower position of the first connecting rod, the third connecting rod is hinged and fixed at the right position of the lower part of the second connecting rod, the fourth connecting rod is fixedly arranged at the lower position of the fixed bottom plate, and the fixed bottom plate is fixedly arranged at the bottom of the rear approach bridge and close to the upper position of the left side; the lower parts of the first connecting rod and the fourth connecting rod are provided with hinge holes, two ends of the second connecting rod and the third connecting rod are provided with hinge holes, and the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod are hinged and aligned correspondingly and fixedly hinged by a pin shaft penetrating through the hinge holes; the right end of the oil cylinder is fixedly connected with a hinge pin shaft between the second connecting rod and the third connecting rod.
The oil cylinder fixing arm is fixedly arranged at the middle position of the lower part of the fixing body, the first connecting rod is fixedly arranged at the middle position of the lower part of the right side of the fixing body, and the fixing bottom plate is fixedly arranged at the middle position of the bottom of the rear approach bridge.
The oil cylinder is fixedly connected with a control valve of the hydraulic station through a hydraulic oil pipe.
The second connecting rod is in an arc shape bent towards the left side.
The use process of the four-bar linkage lifting device of the trestle approach bridge is as follows: when earth to be excavated at the lower part of the rear approach bridge needs to be excavated by an excavator, firstly, a control valve of a hydraulic station is opened, the hydraulic station supplies oil to an oil cylinder of a lifting device through a hydraulic oil pipe, a telescopic rod of the hydraulic cylinder is extended, a second connecting rod is pushed to take a pin shaft of the first connecting rod and a pin shaft of the second connecting rod as a hinged movable shaft, a third connecting rod is pushed to take a pin shaft of the second connecting rod and a pin shaft of the third connecting rod as a hinged movable shaft and lift the upper part of the right side, and meanwhile, the rear approach bridge takes the right end of a main bridge as a rotation center through the hinged fixing action of a first fixing lug and a second fixing lug and lifts the rear approach bridge upwards; the four-bar lifting mechanism formed by the first connecting bar, the second connecting bar, the third connecting bar and the fourth connecting bar bears the weight load of the rear approach bridge, the weight load of the approach bridge is prevented from being directly acted on the oil cylinder, the oil leakage condition of the oil cylinder is prevented, and the service life of the oil cylinder is prolonged.
The first fixing lugs are longitudinally and uniformly arranged at the bottom of the right side of the main bridge, the second fixing lugs are longitudinally and uniformly arranged at the left end of the rear approach bridge, through holes are formed in the first fixing lugs and the second fixing lugs, and the main bridge and the rear approach bridge are hinged and fixed into a whole through pin shafts for butt joint of the first fixing lugs and the second fixing lugs. The main purposes of this arrangement are: the rear approach bridge is lifted to a certain height by taking the right end of the approach bridge and the main bridge as a rotating center and taking an oil cylinder of the lifting device as lifting power through the hinged fixing action of the first fixed lug pin shaft and the second fixed lug pin shaft and through the hinged movement of the first connecting rod, the second connecting rod, the third connecting rod and the connecting rods, so that the excavator is convenient to carry out excavation construction operation on the excavated earthwork.
The lifting device is fixedly arranged at the right side position of the upper part of the rear supporting seat, and is used for lifting and swinging the rear approach bridge; the lifting device comprises a fixed body, the fixed body is fixedly arranged at the lower part of the right end of the main bridge, the upper part of the fixed body is fixedly connected with the bottom of the main bridge, and the left side of the fixed body is fixedly connected with the right side of the upper part of the rear supporting seat; the oil cylinder fixing arm is fixedly arranged at the lower part of the fixing body, an oil cylinder hinge hole is formed in the lower part of the oil cylinder fixing arm, and the left end of the oil cylinder is fixedly connected with the oil cylinder hinge hole through a pin shaft; the first connecting rod is fixedly arranged at the lower position of the right side of the fixed body, the second connecting rod is hinged and fixed at the lower position of the first connecting rod, the third connecting rod is hinged and fixed at the right position of the lower part of the second connecting rod, the fourth connecting rod is fixedly arranged at the lower position of the fixed bottom plate, and the fixed bottom plate is fixedly arranged at the bottom of the rear approach bridge and close to the upper position of the left side; the lower parts of the first connecting rod and the fourth connecting rod are provided with hinge holes, two ends of the second connecting rod and the third connecting rod are provided with hinge holes, and the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod are hinged and aligned correspondingly and fixedly hinged by a pin shaft penetrating through the hinge holes; the right end of the oil cylinder is fixedly connected with a hinge pin shaft between the second connecting rod and the third connecting rod. The main purposes of this arrangement are: taking an oil cylinder of a lifting device as lifting power, lifting the rear approach bridge to a certain height through the hinging movement of a connecting rod I, a connecting rod II, a connecting rod III and a connecting rod IV, and fixedly hinging the connecting rod I, the connecting rod II, the connecting rod III and the connecting rod IV to form a four-connecting-rod support; on the one hand, the lifting height of the approach bridge is improved, and the excavation construction at the lower part of the approach bridge is convenient. On the other hand, the weight load of the approach bridge is prevented from directly acting on the oil cylinder, the oil leakage condition of the oil cylinder is prevented, and the service life of the oil cylinder is prolonged.
The oil cylinder fixing arm is fixedly arranged at the middle position of the lower part of the fixing body, the first connecting rod is fixedly arranged at the middle position of the lower part of the right side of the fixing body, and the fixing bottom plate is fixedly arranged at the middle position of the bottom of the rear approach bridge. The main purposes of this arrangement are: the vertical lifting force of the oil cylinder to the rear approach bridge is improved, so that the rear approach bridge is stably lifted. The utility model has the advantages that: 1. the lifting height of the approach bridge is improved, and excavation construction at the lower part of the approach bridge is facilitated. 2. The lifting structure with the four connecting rods can be used for sharing the weight load of the approach bridge, so that the weight load of the approach bridge is prevented from being directly acted on the oil cylinder, the oil leakage condition of the oil cylinder is prevented, and the service life of the oil cylinder is prolonged.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a partially enlarged schematic view of the present invention;
the mark in the figure is: 1. the method comprises the steps of excavating earthwork 2, a main bridge 3, a rear supporting seat 4, a first fixing lug 5, a second fixing lug 6, a rear approach bridge 7, a lifting device 71, a fixing body 72, a cylinder fixing arm 73, a cylinder hinge hole 74, a cylinder 75, a first connecting rod 76, a second connecting rod 77, a third connecting rod 78, a fourth connecting rod 79, a hinge hole 710 and a fixing bottom plate.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
As shown in the figures, the utility model provides a four-bar linkage lifting device of trestle approach, which comprises an earthwork 1 to be excavated, a main bridge 2 and a rear supporting seat 3; the earthwork 1 to be excavated is positioned at the lower part of the rear approach bridge 6; the main bridge 2 is fixedly arranged at the upper part of the rear supporting seat 3, the first fixing lugs 4 are longitudinally and uniformly arranged at the bottom of the right side of the main bridge 2, the second fixing lugs 5 are longitudinally and uniformly arranged at the left end of the rear approach bridge 6, through holes are formed in the first fixing lugs 4 and the second fixing lugs 5, and the main bridge 2 and the rear approach bridge 6 are hinged and fixed into a whole by a pin shaft through the butt joint of the through holes of the first fixing lugs 4 and the second fixing lugs 5; the lifting device 7 is fixedly arranged at the right side position of the upper part of the rear supporting seat 3, and the lifting device 7 is used for lifting and swinging the rear approach bridge 6; the lifting device 7 comprises a fixed body 71, the fixed body 71 is fixedly arranged at the lower position of the right end of the main bridge 2, the upper part of the fixed body 71 is fixedly connected with the bottom of the main bridge 2, and the left side of the fixed body 71 is fixedly connected with the right side of the upper part of the rear supporting seat 3; the oil cylinder fixing arm 72 is fixedly arranged at the lower part of the fixing body 71, an oil cylinder hinge hole 73 is formed in the lower part of the oil cylinder fixing arm 72, and the left end of the oil cylinder 74 is fixedly connected with the oil cylinder hinge hole 73 through a pin shaft; the first connecting rod 75 is fixedly arranged at the lower position of the right side of the fixed body 71, the second connecting rod 76 is hinged and fixed at the lower position of the first connecting rod 75, the third connecting rod 77 is hinged and fixed at the lower right position of the second connecting rod 76, the fourth connecting rod 78 is fixedly arranged at the lower position of the fixed bottom plate 710, and the fixed bottom plate 710 is fixedly arranged at the bottom of the rear approach bridge 6 and close to the upper position of the left side; the lower parts of the first connecting rod 75 and the fourth connecting rod 78 are provided with hinge holes 79, the two ends of the second connecting rod 76 and the third connecting rod 77 are provided with hinge holes 79, the first connecting rod 75, the second connecting rod 76, the third connecting rod 77 and the fourth connecting rod 78 are correspondingly hinged in an aligning way, and pass through the hinge holes 79 for fixed hinge joint through a pin shaft; the right end of the oil cylinder 74 is fixedly connected with a hinge pin shaft between the second connecting rod 76 and the third connecting rod 77.
The cylinder fixing arm 72 is fixedly arranged at the middle position of the lower part of the fixing body 71, the first connecting rod 75 is fixedly arranged at the middle position of the lower part of the right side of the fixing body 71, and the fixing bottom plate 710 is fixedly arranged at the middle position of the bottom of the rear approach bridge 6.
The oil cylinder 74 is fixedly connected with a control valve of the hydraulic station through a hydraulic oil pipe.
The second connecting rod 76 is in an arc shape bent towards the left side.
The use process of the four-bar linkage lifting device of the trestle approach bridge is as follows: when the earth 1 to be excavated at the lower part of the rear approach bridge 6 needs to be excavated by an excavator, a control valve of a hydraulic station is firstly opened, the hydraulic station supplies oil to an oil cylinder 74 of the lifting device 7 through a hydraulic oil pipe, a telescopic rod of the hydraulic cylinder 74 is extended, a second connecting rod 76 is pushed to take a pin shaft of a first connecting rod 75 and a pin shaft of a second connecting rod 76 as a hinged movable shaft, a third connecting rod 77 is pushed to take a pin shaft of the second connecting rod 76 and a pin shaft of the third connecting rod 77 as a hinged movable shaft, the upper part of the right side is lifted, and the rear approach bridge 6 is lifted upwards by taking the right end of the main bridge 2 as a rotation center through the hinged fixing action of a first fixing lug 4 and a second fixing lug 5; the four-bar linkage lifting mechanism formed by the first connecting bar 75, the second connecting bar 76, the third connecting bar 77 and the fourth connecting bar 78 bears the weight load of the rear approach bridge 6, so that the weight load of the approach bridge is prevented from being directly acted on the oil cylinder, the oil leakage condition of the oil cylinder is prevented, and the service life of the oil cylinder is prolonged.
Various modifications to the above-described embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. A four-bar linkage lifting device of a trestle approach comprises earthwork to be excavated, a main bridge and a rear supporting seat; the earthwork to be excavated is positioned at the lower part of the rear approach bridge; the main bridge is fixedly arranged at the upper part of the rear supporting seat, the first fixing lugs are longitudinally and uniformly arranged at the bottom of the right side of the main bridge, the second fixing lugs are longitudinally and uniformly arranged at the left end of the rear approach bridge, the first fixing lugs and the second fixing lugs are provided with through holes, and the main bridge and the rear approach bridge are hinged and fixed into a whole by pin shafts for butting the through holes of the first fixing lugs and the second fixing lugs; the method is characterized in that: the lifting device is fixedly arranged at the right side position of the upper part of the rear supporting seat, and is used for lifting and swinging the rear approach bridge; the lifting device comprises a fixed body, the fixed body is fixedly arranged at the lower part of the right end of the main bridge, the upper part of the fixed body is fixedly connected with the bottom of the main bridge, and the left side of the fixed body is fixedly connected with the right side of the upper part of the rear supporting seat; the oil cylinder fixing arm is fixedly arranged at the lower part of the fixing body, an oil cylinder hinge hole is formed in the lower part of the oil cylinder fixing arm, and the left end of the oil cylinder is fixedly connected with the oil cylinder hinge hole through a pin shaft; the first connecting rod is fixedly arranged at the lower position of the right side of the fixed body, the second connecting rod is hinged and fixed at the lower position of the first connecting rod, the third connecting rod is hinged and fixed at the right position of the lower part of the second connecting rod, the fourth connecting rod is fixedly arranged at the lower position of the fixed bottom plate, and the fixed bottom plate is fixedly arranged at the bottom of the rear approach bridge and close to the upper position of the left side; the lower parts of the first connecting rod and the fourth connecting rod are provided with hinge holes, the two ends of the second connecting rod and the third connecting rod are provided with hinge holes, and the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod are correspondingly hinged in an aligning manner and fixedly hinged by a pin shaft penetrating through the hinge holes; the right end of the oil cylinder is fixedly connected with a hinge pin shaft between the second connecting rod and the third connecting rod.
2. The four-bar linkage lifting device of the trestle approach according to claim 1, characterized in that: the oil cylinder fixing arm is fixedly arranged at the middle position of the lower part of the fixing body, the first connecting rod is fixedly arranged at the middle position of the lower part of the right side of the fixing body, and the fixing bottom plate is fixedly arranged at the middle position of the bottom of the rear approach bridge.
3. The four-bar linkage lifting device of the trestle approach according to claim 2, characterized in that: the oil cylinder is fixedly connected with a control valve of the hydraulic station through a hydraulic oil pipe.
4. The four-bar linkage lifting device of the trestle approach according to claim 1, characterized in that: the second connecting rod is in an arc shape bent towards the left side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221510857.4U CN217460219U (en) | 2022-06-17 | 2022-06-17 | Four-bar linkage lifting device of trestle approach bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221510857.4U CN217460219U (en) | 2022-06-17 | 2022-06-17 | Four-bar linkage lifting device of trestle approach bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217460219U true CN217460219U (en) | 2022-09-20 |
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ID=83238066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221510857.4U Active CN217460219U (en) | 2022-06-17 | 2022-06-17 | Four-bar linkage lifting device of trestle approach bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217460219U (en) |
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2022
- 2022-06-17 CN CN202221510857.4U patent/CN217460219U/en active Active
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