High-efficient device that levels of foundation for construction
Technical Field
The invention relates to a high-efficiency leveling device for a foundation for building construction, in particular to a high-efficiency leveling device for a foundation for building construction.
Background
The building construction refers to production activities in the engineering construction implementation stage, is the construction process of various buildings, and also can be a process of changing various lines on a design drawing into a real object at a specified place. The method comprises foundation engineering construction, main structure construction, roofing engineering construction, decoration engineering construction and the like. The site of the construction work is called a "construction site" or "job site", also called a worksite.
The foundation refers to the soil or rock mass of the supporting foundation under the building. Soil layers as building foundations are divided into rocks, gravel soil, sandy soil, silt soil, cohesive soil and artificial filling soil. The foundation includes a natural foundation and an artificial foundation (composite foundation). Natural foundations are layers of natural soil that do not require human reinforcement. The artificial foundation needs reinforcement treatment by people, and a stone chip cushion layer, a sand cushion layer, mixed lime-soil backfill, tamping and the like are common.
The existing foundation leveling device for building construction has the defects of uneven foundation leveling, low leveling speed, time and labor waste, so that the development of a foundation high-efficiency leveling device for building construction, which is even in foundation leveling, high in leveling speed, time-saving and labor-saving, is urgently needed.
Disclosure of Invention
(1) Technical problem to be solved
The invention aims to overcome the defects of uneven foundation leveling, low leveling speed, time and labor waste of the conventional foundation leveling device for building construction, and the technical problem to be solved is to provide the efficient foundation leveling device for building construction, which is uniform in foundation leveling, high in leveling speed, time-saving and labor-saving.
(2) Technical scheme
In order to solve the technical problem, the invention provides a high-efficiency leveling device for a foundation for building construction, which comprises a bottom plate, wheels, n-shaped frames, a lifting device, a leveling device, guide rails, guide blocks and fixing plates, wherein the wheels are symmetrically arranged at the bottom of the bottom plate, the n-shaped frames are arranged at the top of the bottom plate, the lifting device is arranged at the inner top of each n-shaped frame, the guide rails are symmetrically arranged on the left wall and the right wall in each n-shaped frame, the guide blocks are arranged on the guide rails, the fixing plates are arranged between the left guide block and the right guide block, the leveling device is arranged at the bottom of each.
Preferably, elevating gear is including the head rod, the second connecting rod, the cylinder, the third connecting rod, the fourth connecting rod, first slide rail, first slider and first spring, the top left and right sides articulates respectively and is connected with head rod and second connecting rod in the n shape frame, the right-hand articulated cylinder that is connected with of second connecting rod, the bottom and the articulated connection of third connecting rod of cylinder, the articulated fourth connecting rod that is connected with in bottom of head rod, the articulated third connecting rod that is connected with in bottom of second connecting rod, the fixed plate top is equipped with first slide rail, the gliding type is equipped with two first sliders on the first slide rail, the both ends of first slide rail all are equipped with first spring, first spring is connected with first slider, the bottom of third connecting rod and fourth connecting rod is articulated with two first sliders about with respectively and is connected.
Preferably, level and smooth device is equipped with the mounting bracket including mounting bracket, first motor, cylinder, bearing frame and pivot bottom the fixed plate, and the front side is equipped with first motor in the mounting bracket, is equipped with the pivot on the output shaft of first motor, is equipped with the cylinder in the pivot, and the rear side of mounting bracket is equipped with the bearing frame, and the pivot rear end is connected with the bearing frame.
Preferably, the mobile device comprises a second slide rail, a second slide block, a second spring, an electric reel and a pull wire, the second slide rail is arranged at the bottom of the fixed plate, the second slide rail is slidably provided with the second slide block, the bottom of the second slide block is connected with the mounting frame, the electric reel is arranged on the front side of the left end of the second slide rail, the pull wire is wound on the electric reel, the tail end of the pull wire is connected with the second slide block, and the second spring is arranged between the right end of the second slide rail and the right end of the second slide block.
Preferably, still including the device of paving, the device of paving is including the dead lever, the second motor, sector gear, the riser, the third slide rail, the third slider, rack and movable block, bottom plate bottom left side is equipped with the dead lever, dead lever bottom left side is equipped with the second motor, be connected with the gear on the output shaft of second motor, be equipped with the riser in the middle of the dead lever bottom, the riser left side is equipped with the third slide rail, the gliding style is equipped with the third slider on the third slide rail, third slider left side is equipped with the rack, wheel and rack toothing, the rack bottom is established owing to the movable block.
Preferably, still including first electric putter and diaphragm, the bottom plate bottom left and right sides symmetry is equipped with first electric putter, and first electric putter bottom is equipped with the diaphragm, and the left and right sides of diaphragm is opened there is the guide hole, and the guide hole corresponds with the wheel.
Preferably, the device further comprises a clamping rod and a second electric push rod, the second electric push rod is arranged at the top and the bottom of the bearing seat, and the clamping rod is arranged on a telescopic rod of the second electric push rod.
Preferably, the first motor and the second motor are servo motors.
The working principle is as follows: when needs level ground, at first, promote this device to needs level place, then start elevating gear work, drive and level the device and move down and pass the through-hole, when leveling the device and contact ground, elevating gear stop work, start again and level the device work and level ground, meanwhile, slowly promote this device, level large tracts of land ground.
Because elevating gear is including the head rod, the second connecting rod, the cylinder, the third connecting rod, the fourth connecting rod, first slide rail, first slider and first spring, the top left and right sides articulates respectively and is connected with head rod and second connecting rod in the n shape frame, the right-hand articulated cylinder that is connected with of second connecting rod, the bottom and the articulated connection of third connecting rod of cylinder, the articulated fourth connecting rod that is connected with in bottom of head rod, the articulated third connecting rod that is connected with in bottom of second connecting rod, the fixed plate top is equipped with first slide rail, the gliding type is equipped with two first sliders on the first slide rail, the both ends of first slide rail all are equipped with first spring, first spring is connected with first slider, the bottom of third connecting rod and fourth connecting rod is articulated with two first sliders about with respectively and is connected. Therefore, when the starting cylinder extends, the third connecting rod and the fourth connecting rod are driven to move downwards, the two first sliding blocks move towards the middle, the first spring is stretched, the guide block and the fixing plate are driven to move downwards, the leveling device moves downwards along with the guide block and the fixing plate, and then the ground is leveled.
Because level and smooth device is equipped with the mounting bracket including mounting bracket, first motor, cylinder, bearing frame and pivot bottom the fixed plate, and the front side is equipped with first motor in the mounting bracket, is equipped with the pivot on the output shaft of first motor, is equipped with the cylinder in the pivot, and the rear side of mounting bracket is equipped with the bearing frame, and the pivot rear end is connected with the bearing frame. Therefore, when the leveling device moves downwards to be in contact with the ground, the first motor is started to work to drive the roller to rotate, the ground is rolled, leveled and compacted, and when the ground is not required to be leveled, the first motor is turned off.
Because still including the mobile device, the mobile device is including the second slide rail, the second slider, the second spring, electronic reel with act as go-between, the fixed plate bottom is equipped with the second slide rail, the gliding style is equipped with the second slider on the second slide rail, second slider bottom is connected with the mounting bracket, the left end front side of second slide rail is equipped with electronic reel, around having on the electronic reel to act as go-between, the tail end and the second slider of acting as go-between are connected, be equipped with the second spring between the right-hand member of second slide rail and the right-hand member of second slider. When the ground is leveled, the electric reel is started to take up and release the stay wire, the second sliding block is driven to move left and right, the second spring is stretched at the moment, and then the leveling device is driven to move left and right, so that the ground can be leveled more uniformly.
Because still including the device of paving, the device of paving is including the dead lever, the second motor, sector gear, the riser, the third slide rail, the third slider, rack and movable block, bottom plate bottom left side is equipped with the dead lever, dead lever bottom left side is equipped with the second motor, be connected with the gear on the output shaft of second motor, be equipped with the riser in the middle of the dead lever bottom, the riser left side is equipped with the third slide rail, the gliding style is equipped with the third slider on the third slide rail, third slider left side is equipped with the rack, wheel and rack toothing, the rack bottom is established owing to the movable block. Therefore, the second motor is started to rotate in a positive and negative alternate mode to drive the sector gear to rotate in a positive and negative alternate mode, the rack moves back and forth along with the sector gear, and then the moving block is driven to move back and forth, so that the ground can be initially paved, and the paving speed is accelerated.
Because still including first electric putter and diaphragm, the bottom plate bottom left and right sides symmetry is equipped with first electric putter, and first electric putter bottom is equipped with the diaphragm, and the left and right sides of diaphragm is opened there is the guide hole, and the guide hole corresponds with the wheel. Therefore, when the device is not needed to be used, the first electric push rod is started to extend to drive the transverse plate to move downwards, when the wheels are just positioned in the guide holes, the first electric push rod stops extending, and the wheels are fixed, so that the device can be prevented from moving.
Because still including clamping bar and second electric putter, the top and the bottom of bearing frame are equipped with second electric putter, are equipped with the clamping bar on second electric putter's the telescopic link. Therefore, when the roller needs to be replaced, the second electric push rod can be controlled to be shortened, the clamping rod does not clamp the rotating shaft any more, and the roller can be replaced.
(3) Advantageous effects
The device achieves the effects of leveling and leveling the foundation uniformly, high leveling speed, time saving and labor saving, adopts a rolling and flattening mode to level the foundation more uniformly, can also lift and move, and is more convenient to adjust.
Drawings
Fig. 1 is a first front view structure diagram of the present invention.
FIG. 2 is a schematic diagram of a right side view of the leveling device of the present invention.
Fig. 3 is a schematic front view of the lifting device of the present invention.
Fig. 4 is a second front view structure diagram of the present invention.
Fig. 5 is a schematic front view of the paving device of the present invention.
Fig. 6 is a schematic bottom view of the paving apparatus of the present invention.
Fig. 7 is a third schematic view of the present invention.
Fig. 8 is a front view of the bearing seat of the present invention.
The labels in the figures are: 1-base plate, 2-wheel, 3-n-frame, 4-lifting device, 41-first connecting rod, 42-second connecting rod, 43-cylinder, 44-third connecting rod, 45-fourth connecting rod, 46-first slide rail, 47-first slide block, 48-first spring, 5-leveling device, 51-mounting frame, 52-first motor, 53-roller, 54-bearing seat, 55-rotating shaft, 6-through hole, 7-moving device, 71-second slide rail, 72-second slide block, 73-second spring, 74-electric reel, 75-pull wire, 8-paving device, 81-fixing rod, 82-second motor, 83-sector gear, 84-vertical plate, 85-third slide rail, 86-third sliding block, 87-rack, 88-moving block, 9-guide rail, 10-guide block, 11-fixing plate, 12-first electric push rod, 13-transverse plate, 14-guide hole, 15-clamping rod and 16-second electric push rod.
Detailed Description
The invention is further described below with reference to the figures and examples.
Example 1
The utility model provides a high-efficient device that levels of foundation for construction, as shown in fig. 1-8, including bottom plate 1, wheel 2, n shape frame 3, elevating gear 4, level device 5, guide rail 9, guide block 10 and fixed plate 11, 1 bottom symmetry of bottom plate is equipped with wheel 2, 1 top of bottom plate is equipped with n shape frame 3, the top is equipped with elevating gear 4 in the n shape frame 3, left wall and interior right wall symmetry are equipped with guide rail 9 in the n shape frame 3, be equipped with guide block 10 on the guide rail 9, be equipped with fixed plate 11 between two guide blocks 10 about, fixed plate 11 bottom is equipped with and levels device 5, open in the middle of the bottom plate 1 has through-hole 6.
Example 2
The utility model provides a high-efficient device that levels of foundation for construction, as shown in fig. 1-8, including bottom plate 1, wheel 2, n shape frame 3, elevating gear 4, level device 5, guide rail 9, guide block 10 and fixed plate 11, 1 bottom symmetry of bottom plate is equipped with wheel 2, 1 top of bottom plate is equipped with n shape frame 3, the top is equipped with elevating gear 4 in the n shape frame 3, left wall and interior right wall symmetry are equipped with guide rail 9 in the n shape frame 3, be equipped with guide block 10 on the guide rail 9, be equipped with fixed plate 11 between two guide blocks 10 about, fixed plate 11 bottom is equipped with and levels device 5, open in the middle of the bottom plate 1 has through-hole 6.
The lifting device 4 comprises a first connecting rod 41, a second connecting rod 42, a cylinder 43, a third connecting rod 44, a fourth connecting rod 45, a first slide rail 46, a first slide block 47 and a first spring 48, the top left and right sides articulates respectively in n shape frame 3 and is connected with first connecting rod 41 and second connecting rod 42, the right-hand articulated cylinder 43 that is connected with of second connecting rod 42, the bottom and the articulated connection of third connecting rod 44 of cylinder 43, the articulated fourth connecting rod 45 that is connected with of bottom of first connecting rod 41, the articulated third connecting rod 44 that is connected with of bottom of second connecting rod 42, fixed plate 11 top is equipped with first slide rail 46, the gliding style is equipped with two first sliders 47 on first slide rail 46, the both ends of first slide rail 46 all are equipped with first spring 48, first spring 48 is connected with first slider 47, the bottom of third connecting rod 44 and fourth connecting rod 45 is connected with two first sliders 47 about with articulated respectively.
Example 3
The utility model provides a high-efficient device that levels of foundation for construction, as shown in fig. 1-8, including bottom plate 1, wheel 2, n shape frame 3, elevating gear 4, level device 5, guide rail 9, guide block 10 and fixed plate 11, 1 bottom symmetry of bottom plate is equipped with wheel 2, 1 top of bottom plate is equipped with n shape frame 3, the top is equipped with elevating gear 4 in the n shape frame 3, left wall and interior right wall symmetry are equipped with guide rail 9 in the n shape frame 3, be equipped with guide block 10 on the guide rail 9, be equipped with fixed plate 11 between two guide blocks 10 about, fixed plate 11 bottom is equipped with and levels device 5, open in the middle of the bottom plate 1 has through-hole 6.
The lifting device 4 comprises a first connecting rod 41, a second connecting rod 42, a cylinder 43, a third connecting rod 44, a fourth connecting rod 45, a first slide rail 46, a first slide block 47 and a first spring 48, the top left and right sides articulates respectively in n shape frame 3 and is connected with first connecting rod 41 and second connecting rod 42, the right-hand articulated cylinder 43 that is connected with of second connecting rod 42, the bottom and the articulated connection of third connecting rod 44 of cylinder 43, the articulated fourth connecting rod 45 that is connected with of bottom of first connecting rod 41, the articulated third connecting rod 44 that is connected with of bottom of second connecting rod 42, fixed plate 11 top is equipped with first slide rail 46, the gliding style is equipped with two first sliders 47 on first slide rail 46, the both ends of first slide rail 46 all are equipped with first spring 48, first spring 48 is connected with first slider 47, the bottom of third connecting rod 44 and fourth connecting rod 45 is connected with two first sliders 47 about with articulated respectively.
Leveling device 5 is equipped with mounting bracket 51 including mounting bracket 51, first motor 52, cylinder 53, bearing frame 54 and pivot 55 bottom fixed plate 11, and the front side is equipped with first motor 52 in mounting bracket 51, is equipped with pivot 55 on the output shaft of first motor 52, is equipped with cylinder 53 on the pivot 55, and the rear side of mounting bracket 51 is equipped with bearing frame 54, and the pivot 55 rear end is connected with bearing frame 54.
Example 4
The utility model provides a high-efficient device that levels of foundation for construction, as shown in fig. 1-8, including bottom plate 1, wheel 2, n shape frame 3, elevating gear 4, level device 5, guide rail 9, guide block 10 and fixed plate 11, 1 bottom symmetry of bottom plate is equipped with wheel 2, 1 top of bottom plate is equipped with n shape frame 3, the top is equipped with elevating gear 4 in the n shape frame 3, left wall and interior right wall symmetry are equipped with guide rail 9 in the n shape frame 3, be equipped with guide block 10 on the guide rail 9, be equipped with fixed plate 11 between two guide blocks 10 about, fixed plate 11 bottom is equipped with and levels device 5, open in the middle of the bottom plate 1 has through-hole 6.
The lifting device 4 comprises a first connecting rod 41, a second connecting rod 42, a cylinder 43, a third connecting rod 44, a fourth connecting rod 45, a first slide rail 46, a first slide block 47 and a first spring 48, the top left and right sides articulates respectively in n shape frame 3 and is connected with first connecting rod 41 and second connecting rod 42, the right-hand articulated cylinder 43 that is connected with of second connecting rod 42, the bottom and the articulated connection of third connecting rod 44 of cylinder 43, the articulated fourth connecting rod 45 that is connected with of bottom of first connecting rod 41, the articulated third connecting rod 44 that is connected with of bottom of second connecting rod 42, fixed plate 11 top is equipped with first slide rail 46, the gliding style is equipped with two first sliders 47 on first slide rail 46, the both ends of first slide rail 46 all are equipped with first spring 48, first spring 48 is connected with first slider 47, the bottom of third connecting rod 44 and fourth connecting rod 45 is connected with two first sliders 47 about with articulated respectively.
Leveling device 5 is equipped with mounting bracket 51 including mounting bracket 51, first motor 52, cylinder 53, bearing frame 54 and pivot 55 bottom fixed plate 11, and the front side is equipped with first motor 52 in mounting bracket 51, is equipped with pivot 55 on the output shaft of first motor 52, is equipped with cylinder 53 on the pivot 55, and the rear side of mounting bracket 51 is equipped with bearing frame 54, and the pivot 55 rear end is connected with bearing frame 54.
The automatic winding device is characterized by further comprising a moving device 7, wherein the moving device 7 comprises a second slide rail 71, a second slide block 72, a second spring 73, an electric reel 74 and a pull wire 75, the second slide rail 71 is arranged at the bottom of the fixing plate 11, the second slide rail 71 is slidably provided with the second slide block 72, the bottom of the second slide block 72 is connected with the mounting frame 51, the electric reel 74 is arranged on the front side of the left end of the second slide rail 71, the pull wire 75 is wound on the electric reel 74, the tail end of the pull wire 75 is connected with the second slide block 72, and the second spring 73 is arranged between the right end of the second slide rail 71 and the right end of the second slide block.
Still including the device 8 of paving, the device 8 of paving is including the dead lever 81, second motor 82, sector gear 83, riser 84, third slide rail 85, third slider 86, rack 87 and movable block 88, bottom plate 1 bottom left side is equipped with dead lever 81, dead lever 81 bottom left side is equipped with second motor 82, be connected with the gear on the output shaft of second motor 82, be equipped with riser 84 in the middle of the dead lever 81 bottom, riser 84 left side is equipped with third slide rail 85, the gliding style is equipped with third slider 86 on third slide rail 85, third slider 86 left side is equipped with rack 87, the meshing of gear and rack 87, establish because movable block 88 in rack 87 bottom.
Still including first electric putter 12 and diaphragm 13, the bottom of bottom plate 1 bottom left and right sides symmetry is equipped with first electric putter 12, and first electric putter 12 bottom is equipped with diaphragm 13, and the left and right sides of diaphragm 13 is opened has guide hole 14, and guide hole 14 corresponds with wheel 2.
The clamping device further comprises a clamping rod 15 and a second electric push rod 16, the second electric push rod 16 is arranged at the top and the bottom of the bearing seat 54, and the clamping rod 15 is arranged on the telescopic rod of the second electric push rod 16.
The first motor 52 and the second motor 82 are servo motors.
The working principle is as follows: when needs level ground, at first, promote this device to needs level place, then start elevating gear 4 work, drive and level device 5 and move down and pass through-hole 6, when leveling device 5 contacts ground, elevating gear 4 stop work, start again and level device 5 work and level ground, meanwhile, slowly promote this device, level large tracts of land ground.
Because the lifting device 4 comprises the first connecting rod 41, the second connecting rod 42, the air cylinder 43, the third connecting rod 44, the fourth connecting rod 45, the first slide rail 46, the first slide block 47 and the first spring 48, the top left and right sides articulates respectively in n shape frame 3 and is connected with first connecting rod 41 and second connecting rod 42, the right-hand articulated cylinder 43 that is connected with of second connecting rod 42, the bottom and the articulated connection of third connecting rod 44 of cylinder 43, the articulated fourth connecting rod 45 that is connected with of bottom of first connecting rod 41, the articulated third connecting rod 44 that is connected with of bottom of second connecting rod 42, fixed plate 11 top is equipped with first slide rail 46, the gliding style is equipped with two first sliders 47 on first slide rail 46, the both ends of first slide rail 46 all are equipped with first spring 48, first spring 48 is connected with first slider 47, the bottom of third connecting rod 44 and fourth connecting rod 45 is connected with two first sliders about with articulated respectively. Therefore, when the cylinder 43 is started to extend, the third connecting rod 44 and the fourth connecting rod are driven to move downwards, the two first sliding blocks 47 move towards the middle, the first spring 48 is stretched, and then the guide block 10 and the fixed plate 11 are driven to move downwards, and the leveling device 5 moves downwards along with the guide block and then levels the ground.
Because leveling device 5 is including mounting bracket 51, first motor 52, cylinder 53, bearing frame 54 and pivot 55, fixed plate 11 bottom is equipped with mounting bracket 51, and the front side is equipped with first motor 52 in mounting bracket 51, is equipped with pivot 55 on the output shaft of first motor 52, is equipped with cylinder 53 on the pivot 55, and the rear side of mounting bracket 51 is equipped with bearing frame 54, and the pivot 55 rear end is connected with bearing frame 54. Therefore, when the leveling device 5 moves downwards to contact the ground, the first motor 52 is started to work, the roller 53 is driven to rotate, the ground is rolled, leveled and compacted, and when the ground is not required to be leveled, the first motor 52 is switched off.
Because the mobile device 7 is further included, the mobile device 7 includes a second slide rail 71, a second slide block 72, a second spring 73, an electric reel 74 and a pull wire 75, the second slide rail 71 is arranged at the bottom of the fixing plate 11, the second slide rail 71 is slidably provided with the second slide block 72, the bottom of the second slide block 72 is connected with the mounting frame 51, the electric reel 74 is arranged on the front side of the left end of the second slide rail 71, the pull wire 75 is wound on the electric reel 74, the tail end of the pull wire 75 is connected with the second slide block 72, and the second spring 73 is arranged between the right end of the second slide rail 71 and the right end of the second slide block 72. When the ground is leveled, the electric reel 74 is started to take up and pay off the pull wire 75, the second sliding block 72 is driven to move left and right, the second spring 73 is stretched at the moment, and the leveling device 5 is driven to move left and right, so that the ground can be leveled more uniformly.
Because still including the device 8 of paving, the device 8 of paving is including dead lever 81, second motor 82, sector gear 83, riser 84, third slide rail 85, third slider 86, rack 87 and movable block 88, bottom plate 1 bottom left side is equipped with dead lever 81, dead lever 81 bottom left side is equipped with second motor 82, be connected with the gear on the output shaft of second motor 82, be equipped with riser 84 in the middle of the dead lever 81 bottom, riser 84 left side is equipped with third slide rail 85, third slide rail 85 upper sliding type is equipped with third slider 86, third slider 86 left side is equipped with rack 87, the gear meshes with rack 87, establish because movable block 88 in rack 87 bottom. Therefore, the second motor 82 is started to rotate in a positive and negative alternate mode to drive the sector gear 83 to rotate in a positive and negative alternate mode, the rack 87 moves back and forth along with the sector gear, and then the moving block 88 is driven to move back and forth, so that the ground can be initially paved, and the paving speed is increased.
Because still including first electric putter 12 and diaphragm 13, the bottom of bottom plate 1 left and right sides symmetry is equipped with first electric putter 12, and first electric putter 12 bottom is equipped with diaphragm 13, and the left and right sides of diaphragm 13 is opened has guide hole 14, and guide hole 14 corresponds with wheel 2. Therefore, when the device is not needed to be used, the first electric push rod 12 is started to extend to drive the transverse plate 13 to move downwards, when the wheel 2 is just positioned in the guide hole 14, the first electric push rod 12 stops extending, and the wheel 2 is fixed, so that the device can be prevented from moving any more.
Because the clamping rod 15 and the second electric push rod 16 are further included, the second electric push rod 16 is arranged at the top and the bottom of the bearing seat 54, and the clamping rod 15 is arranged on the telescopic rod of the second electric push rod 16. Therefore, when the roller 53 needs to be replaced, the second electric push rod 16 can be controlled to be shortened, the clamping rod 15 can not clamp the rotating shaft 55, and the roller 53 can be replaced.
The above examples are merely representative of preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, various changes, modifications and substitutions can be made without departing from the spirit of the present invention, and these are all within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.