A height-adjustable mechanized bridge foot

Abstract

The present invention provides a height-adjustable mechanized bridge foot, which can improve the applicable scope of the bridge foot, thereby effectively solving the problem of limited adaptability of the existing mechanized bridge foot. The height-adjustable mechanized bridge foot includes: a crown assembly and two bridge foot legs connected by a lateral adjustment cylinder, and the lateral adjustment cylinder is used to adjust the lateral distance between the two bridge foot legs; both bridge foot legs are height-adjustable bridge foot legs, and the height adjustment of the mechanized bridge foot is achieved by adjusting the height of the two bridge foot legs. The bridge foot legs include: a bridge foot column assembly and a base plate assembly; an intermediate springboard is provided in the base plate assembly, and the length of the base plate assembly can be adjusted by changing the working position of the intermediate springboard.

Description

Technical Field

[0001] The invention relates to a bridge foot, in particular to a height-adjustable bridge foot, belonging to the technical field of mechanized bridges. Background Art

[0002] The latest heavy mechanized bridge currently in service in my country is the GQL111 heavy mechanized bridge. This equipment has been mass-equipped to troops and government emergency departments, and plays a huge role in military exercises and flood relief.

[0003] The bridge foot is an important part of the heavy mechanized bridge, which is used to directly support the bridge span and transfer the load on the bridge span to the riverbed. Each bridge vehicle is equipped with a pair of bridge feet. With the improvement of engineering support requirements, the performance shortcomings of the GQL111 heavy mechanized bridge are gradually becoming apparent. The obstacle depth of its bridge foot is between 3.32m and 5m. When facing shoals, shallow rivers and shallow dry ditches with a depth of less than 3.32m, the equipment is limited in use. When facing obstacles with a depth of more than 5m, the equipment cannot be used. Summary of the invention

[0004] In view of this, the present invention provides a height-adjustable mechanized bridge foot, which can improve the application range of the bridge foot, thereby effectively solving the problem of limited adaptability range of existing mechanized bridge feet.

[0005] A height-adjustable mechanized bridge foot comprises: a crown assembly, and two bridge foot legs connected by a transverse adjustment cylinder; the tops of the two bridge foot legs are both connected to the crown assembly, and the crown assembly is used to connect the bridge span and the bridge foot;

[0006] The bridge foot legs include: a bridge foot column assembly and a base plate assembly;

[0007] The bridge foot column assembly comprises: two bridge foot columns and an expansion cylinder for expanding the two bridge foot columns; the two bridge foot columns are both retractable in length; the upper ends of the two bridge foot columns are hinged to the crown material assembly, and the lower ends are respectively connected to the two ends of the base plate assembly; the two bridge foot columns can rotate around the hinge with the crown material assembly under the action of the expansion cylinder, so that the two bridge foot columns are relatively expanded and form a triangular structure with the base plate assembly as a whole;

[0008] The base plate assembly includes: two large base plates, an intermediate springboard and two small base plates; the lower end of the bridge pedestal is connected to the large base plates, one end of the two small base plates is respectively hinged to the two large base plates, and the other end is respectively hinged to the two ends of the intermediate springboard; the intermediate springboard is used to adjust the length of the base plate assembly.

[0009] Furthermore, the two bridge foot columns have the same structure, both comprising: an upper column tube, a bridge foot column hydraulic cylinder and a lower column tube;

[0010] The fixed end of the bridge foot column hydraulic cylinder is connected to the upper column tube, and the telescopic end is connected to the lower column tube.

[0011] Furthermore, the upper column tube is a hollow structure, and when the lower column tube contracts, it contracts into the interior of the upper column tube.

[0012] Further, the intermediate springboard includes two hinged springboards A and springboard B; the intermediate springboard has two working positions, namely a closed position and an open position;

[0013] When the middle springboard is in the open position, the springboard A and the springboard B are unfolded to a horizontal state, and the length of the base plate assembly is the sum of the lengths of the two large base plates, the middle springboard and the two small base plates;

[0014] When the middle springboard is in the closed position, the springboard A and the springboard B are respectively rotated around the hinge points with the small base plate to stand upright and fit together. At this time, the springboard A and the springboard B are in a vertical state, and the length of the base plate assembly is the sum of the lengths of the two large base plates and the two small base plates;

[0015] The length of the base plate assembly is thus adjusted by changing the working position of the intermediate springboard.

[0016] Furthermore, when the springboard A and the springboard B are in the closed position, the positions are locked by means of latches.

[0017] Furthermore, the bridge foot legs also include a lifting mechanism, and the lifting mechanism includes: a steel wire rope, a pulley and a bridge foot winch;

[0018] The pulley is arranged in the middle position of the middle springboard. After the steel wire rope passes through the pulley, the two ends of the steel wire rope respectively pass through the two bridge foot columns and are wound on the bridge foot winch. The steel wire rope is controlled by the bridge foot winch to realize the lifting and lowering of the bridge foot legs.

[0019] Furthermore, after the lower column tube is extended and retracted relative to the upper column tube, the position is locked by a locking mechanism;

[0020] The locking mechanism is arranged at the lower end of the upper column tube, and comprises: a gear sleeve, a pinion and a joystick;

[0021] The two opposite sides of the outer circumferential surface of the lower column tube are provided with external racks for guiding and locking;

[0022] The outer circumference of the gear sleeve is meshed with the pinion, and the joystick drives the gear sleeve to rotate by driving the pinion. The inner circumference of the gear sleeve has two inner racks for meshing with the outer rack on the lower column tube. When the gear sleeve is rotated to mesh the inner rack on the gear sleeve with the outer rack on the lower column tube, the lower column tube is locked. When the gear sleeve is rotated to separate the inner rack on the gear sleeve from the outer rack on the lower column tube, the lower column tube is unlocked.

[0023] Furthermore, the lower end of the bridge foot column is hinged to the base plate assembly through a spherical hinge joint.

[0024] Beneficial effects:

[0025] (1) The height of the bridge foot can be adjusted by adding an intermediate springboard to the base plate and lengthening the bridge foot column; the intermediate springboard has two working positions, open and closed. When the bridge foot is extended a short distance, the intermediate springboard is in the open position (the base plate assembly is longer at this time); when the bridge foot is extended a long distance, the intermediate springboard is in the closed position (the base plate assembly is shorter at this time); thereby, the height adjustment range of the bridge foot column can be increased when the length of the bridge foot column is constant.

[0026] (2) The base plate assembly and the bridge pedestal column are hinged in the present invention, so that the base plate assembly can better adapt to the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the longest extension of the bridge legs in the present invention.

[0028] Figure 2 It is a schematic diagram of the shortest extension of the bridge legs of the present invention.

[0029] Figure 3 The bridge foot transportation state intention of the present invention;

[0030] Among them: 1-height adjustable bridge foot, 2-crown assembly, 3-upper column tube, 4-bridge foot column hydraulic cylinder, 5-lower column tube, 6-wire rope, 7-large base plate, 8-middle springboard, 9-pulley, 10-small base plate DETAILED DESCRIPTION

[0031] The present invention is described in detail below in conjunction with the accompanying drawings.

[0032] Embodiment 1:

[0033] This embodiment provides a height-adjustable mechanized bridge foot for directly supporting the bridge span and transferring the load on the bridge span to the riverbed; in order to facilitate the transportation of equipment, the bridge foot is folded into the bridge span structure in the transportation state.

[0034] The height-adjustable mechanized bridge foot comprises: a crown assembly 2 and two bridge foot legs connected by a lateral adjustment cylinder, the tops of the two bridge foot legs are connected to the crown assembly 2, and the crown assembly 2 is used to connect the bridge span and the bridge foot; the lateral adjustment cylinder is used to adjust the lateral distance between the two bridge foot legs. The two bridge foot legs have the same structure and are both height-adjustable bridge foot legs. The height adjustment of the mechanized bridge foot is achieved by adjusting the height of the two bridge foot legs.

[0035] like Figure 1 and Figure 2 As shown, the bridge foot legs include: a bridge foot column assembly and a base plate assembly;

[0036] The bridge pedestal assembly includes: two bridge pedestals and an expansion cylinder for expanding the two bridge pedestals; the two bridge pedestals are both retractable structures, the upper ends of the two bridge pedestals are hinged to the crown material assembly 2, and the lower ends are respectively connected to the two ends of the base plate assembly; the two bridge pedestals can rotate around the hinge with the crown material assembly 2 under the push of the expansion cylinder, so that the two bridge pedestals are relatively expanded at a certain angle, forming a triangular structure with the base plate assembly as a whole; the base plate assembly is used to evenly transmit the load acting on the bridge span to the riverbed.

[0037] The two bridge piers have the same structure, including: an upper pier tube 3, a bridge pier hydraulic cylinder 4 and a lower pier tube 5; the fixed end of the bridge pier hydraulic cylinder 4 is connected to the upper pier tube 3, and the telescopic end is connected to the lower pier tube 5. The bridge pier hydraulic cylinder 4 drives the lower pier tube 5 to telescope to adjust the length of the bridge pier; after the length of the bridge pier is adjusted to the desired position, the position is locked by a locking mechanism. The lower pier tube 5 is the telescopic part of the bridge pier, which is used to adjust the height of the bridge pier.

[0038] In this example, the length of the upper column tube 3 is slightly larger than that of the lower column tube 5. The upper column tube 3 is a hollow structure. When the lower column tube 5 contracts, it contracts to the inside of the upper column tube 3. Therefore, the longest length of the bridge foot column is the sum of the lengths of the upper column tube 3 and the lower column tube 5, and the shortest length is the length of the upper column tube 3.

[0039] The cylinder end of the expansion cylinder is connected to the upper column tube 3 of one of the bridge pedestals, and the piston end is connected to the upper column tube 3 of the other bridge pedestal, thereby pushing the two bridge pedestals to rotate around the hinge with the crown assembly 2 to expand relative to each other.

[0040] The base plate assembly includes: a large base plate 7, a small base plate 10 and an intermediate springboard 8; wherein the lower end of the lower column tube 5 is hinged to the middle position of the large base plate 7 through a spherical hinge joint, one end of the two small base plates 10 is respectively hinged to the two large base plates 7, and the other end is connected through the intermediate springboard 8. The length of the base plate assembly is adjusted by changing the working position of the intermediate springboard 8.

[0041] The middle springboard 8 includes: two hinged connecting plates, namely springboard A and springboard B; each springboard can rotate around the hinge points on both sides. Let the hinge point between springboard A and the small base board 10 be hinge point A, and the hinge point between springboard B and the small base board 10 be hinge point B. The middle springboard 8 has two working positions, namely closed position and open position. When the middle springboard 8 is in the open position, springboard A and springboard B are unfolded to the same horizontal state as the small base board 10. At this time, the length of the base board assembly is the sum of the lengths of two large base boards 7, two small base boards 10, springboard A and springboard B. Figure 2 As shown; when the middle springboard 8 is in the closed position, the springboard A and the springboard B are rotated around the hinge point A and the hinge point B and are erected upward and fitted together. At this time, the springboard A and the springboard B are in a vertical state. At this time, the length of the base plate assembly is the length of the two large base plates 7 plus the two small base plates 10 and, as Figure 1 As shown; when springboard A and springboard B are in the closed position, the position is locked by a latch.

[0042] When in use, the working position of the middle springboard 8 is selected according to the required bridge pier height. When the bridge pier column is at the shortest extension, the middle springboard 8 is in the open position; when the bridge pier column is extended to a set value (the set value is less than the longest extension of the bridge pier column), the middle springboard 8 is in the closed position.

[0043] In order to facilitate the lifting of the bridge foot, a lifting mechanism is configured for the bridge foot, which includes: a wire rope 6, a pulley 9 and a bridge foot winch; the hinge point of the springboard A and the springboard B is set as the hinge point C, and a pulley 9 is provided at the hinge point C. After the wire rope 6 passes through the pulley 9, both ends of the wire rope 6 pass through the upper column tubes 3 of the two bridge foot columns respectively and then are wound around the bridge foot winch, thereby controlling the wire rope 6 through the bridge foot winch to realize the lifting of the bridge foot.

[0044] In order to facilitate the transportation of equipment, the height-adjustable bridge foot 1 must be placed in the bridge span structure; based on this, when in the transportation state, the lower column tube 5 is completely retracted, the middle springboard 8 is pulled up by the lifting mechanism, and the middle springboard 8 is rotated inward around the hinge point between it and the two small base plates 10 to be folded inward between the two bridge foot columns; at the same time, the large base plate 7 is rotated inward around the hinge point between it and the lower column tube 5 to save space, so that the height-adjustable bridge foot 1 can be folded and folded in the bridge span.

[0045] The operation process of the mechanized bridge foot is as follows:

[0046] like Figure 3 As shown, during transportation, the height-adjustable bridge foot 1 is folded and stored in the bridge span. When erecting the bridge, the two bridge foot legs are pulled apart laterally by the lateral adjustment cylinder and connected to the bridge span through the crown assembly 2. Then, the height-adjustable bridge foot 1 is lowered by the bridge foot winch, and the lower column tube 5 is controlled to extend by the bridge foot column hydraulic cylinder 4. When the two bridge foot columns reach the specified height, the position is locked. When the lower column tube 5 is extended, the two bridge foot columns are controlled to unfold by the unfolding cylinder and then the base plate assembly is unfolded. Then, the working position of the middle springboard 8 is selected according to the required bridge foot height.

[0047] Embodiment 2:

[0048] On the basis of the above embodiment 1, further:

[0049] The locking mechanism used for adjusting the length of the bridge foot column is as follows:

[0050] The two opposite sides of the outer circumference of the lower column tube 5 are provided with external racks for guiding and locking. The lower end of the upper column tube 3 is provided with a locking mechanism that cooperates with the external rack and is used to lock or release the lower column tube 5.

[0051] The locking mechanism includes: a gear sleeve, a pinion and a joystick; the outer circumference of the gear sleeve is meshed with the pinion, and the joystick drives the gear sleeve to rotate by driving the pinion. The inner circumference of the gear sleeve has two inner racks for meshing with the outer racks on the lower column tube 5. When the gear sleeve is rotated to mesh the inner racks on it with the outer racks on the lower column tube 5, the lower column tube 5 is locked. When the gear sleeve is rotated to separate the inner racks on it from the outer racks on the lower column tube 5, the lower column tube 5 is unlocked.

[0052] Embodiment 3:

[0053] On the basis of the above-mentioned embodiment 1 or embodiment 2, the crown material assembly 2 is specifically limited as follows.

[0054] The crown material assembly 2 includes: a crown material, connecting ears, an intermediate support and a latch; the crown material is provided with connecting ears and an intermediate support, which are respectively used to connect the bridge span and the bridge pedestal, and provide guidance for the lateral movement of the bridge pedestal, and transfer the load by overlapping with the bridge span tiger head.

[0055] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A height-adjustable mechanized bridge foot. It is characterized in that include: A crown assembly (2) and two bridge foot legs connected by a transverse adjustment cylinder; the tops of the two bridge foot legs are connected to the crown assembly (2), and the crown assembly (2) is used to connect the bridge span and the bridge foot; The bridge foot legs include: a bridge foot column assembly and a base plate assembly; The bridge foot column assembly comprises: two bridge foot columns and an expansion cylinder for expanding the two bridge foot columns; the two bridge foot columns are both structures with retractable lengths; the upper ends of the two bridge foot columns are hinged to the crown material assembly (2), and the lower ends are respectively connected to the two ends of the base plate assembly; the two bridge foot columns can rotate around the hinged joint with the crown material assembly (2) under the action of the expansion cylinder, so that the two bridge foot columns are relatively expanded and form a triangular structure with the base plate assembly as a whole; The base plate assembly comprises: two large base plates (7), an intermediate springboard (8) and two small base plates (10); the lower end of the bridge foot column is connected to the large base plate (7); one end of the two small base plates (10) is respectively hinged to the two large base plates (7), and the other end is respectively hinged to the two ends of the intermediate springboard (8); the intermediate springboard (8) is used to adjust the length of the base plate assembly; The intermediate springboard (8) comprises two hinged springboards A and B; the intermediate springboard (8) has two working positions, namely a closed position and an open position; When the middle springboard (8) is in the open position, the springboard A and the springboard B are unfolded to a horizontal state, and the length of the base plate assembly is the sum of the lengths of the two large base plates (7), the middle springboard (8) and the two small base plates (10); When the middle springboard (8) is in the closed position, the springboard A and the springboard B are respectively rotated around the hinge points with the small base board (10) to stand upright and fit together. At this time, the springboard A and the springboard B are in a vertical state, and the length of the base board assembly is the sum of the lengths of the two large base boards (7) and the two small base boards (10); Thus, the length of the base plate assembly is adjusted by changing the working position of the intermediate springboard (8); When in use, the working position of the middle springboard (8) is selected according to the required bridge foot height. When the bridge foot column is at the shortest extension distance, the middle springboard (8) is in the open position; when the bridge foot column is extended to a set distance, the middle springboard (8) is in the closed position; The two bridge foot columns have the same structure, and both comprise: an upper column tube (3), a bridge foot column hydraulic cylinder (4) and a lower column tube (5); The fixed end of the bridge foot column hydraulic cylinder (4) is connected to the upper column tube (3), and the telescopic end is connected to the lower column tube (5); the upper column tube (3) is a hollow structure, and when the lower column tube (5) contracts, it contracts into the interior of the upper column tube (3); The bridge foot support leg also includes a lifting mechanism, and the lifting mechanism includes: a steel wire rope (6), a pulley (9) and a bridge foot winch; The pulley (9) is arranged at the middle position of the middle springboard (8); after the steel wire rope (6) passes through the pulley (9), the two ends of the steel wire rope (6) respectively pass through the two bridge foot columns and are wound on the bridge foot winch; the bridge foot winch controls the steel wire rope (6) to achieve the lifting of the bridge foot leg; after the lower column tube (5) is extended and retracted to the position relative to the upper column tube (3), the position is locked by a locking mechanism; The locking mechanism is arranged at the lower end of the upper column tube (3), and comprises: a gear sleeve, a pinion and a joystick; The lower column tube (5) has external racks on two opposite sides of the outer circumferential surface for guiding and locking functions; The outer circumference of the gear sleeve is meshed with the pinion, and the operating lever drives the gear sleeve to rotate by driving the pinion. The inner circumference of the gear sleeve has two inner racks for meshing with the outer racks on the lower column tube (5); when the gear sleeve is rotated to mesh the inner racks on the gear sleeve with the outer racks on the lower column tube (5), the lower column tube (5) is locked; when the gear sleeve is rotated to separate the inner racks on the gear sleeve from the outer racks on the lower column tube (5), the lower column tube (5) is unlocked.

2. The height-adjustable mechanized bridge foot as claimed in claim 1, It is characterized in that When the springboard A and the springboard B are in the closed position, the positions are locked by means of latches.

3. The height-adjustable mechanized bridge foot as claimed in claim 1, It is characterized in that The lower end of the bridge foot column is hinged to the base plate assembly through a spherical hinge joint.

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