CN113231870B

CN113231870B - Arc satellite antenna panel edge cutting device

Info

Publication number: CN113231870B
Application number: CN202110781501.8A
Authority: CN
Inventors: 朱少静
Original assignee: Yantai Marine Aerospace Technology Co ltd
Current assignee: Yantai Marine Aerospace Technology Co ltd
Priority date: 2021-07-12
Filing date: 2021-07-12
Publication date: 2021-09-07
Anticipated expiration: 2041-07-12
Also published as: CN113231870A

Abstract

The invention relates to the technical field of satellite part machining, in particular to an arc-shaped satellite antenna panel edge cutting device which comprises a base, a stepping motor and a satellite panel, wherein a support frame is fixed on the upper surface of the base through bolts, the stepping motor is fixed on the upper surface of the support frame through bolts, a balance seat is movably connected to the lower surface of the support frame, a cutting assembly is fixed on the side surface of the balance seat, the cutting assembly comprises a connecting arm and a first air cylinder, the connecting arm is fixedly connected with the balance seat through bolts, a cutting machine is movably connected to one end, away from the balance seat, of the connecting arm, an edge clamping mechanism is fixed on the outer surface of the cutting machine, and a fixing assembly is fixed on the upper surface of the base. The invention has the edge butt-clamping mechanism, can support the excess materials, avoids irregular tearing of the edge caused by excessive weight of the excess materials, is convenient for rapidly and uniformly cutting the edge of the satellite panel, and cannot cause the offset of the satellite panel.

Description

Arc satellite antenna panel edge cutting device

Technical Field

The invention relates to the technical field of satellite part machining, in particular to an arc-shaped satellite antenna panel edge cutting device.

Background

The satellite antenna is generally in an arc surface shape, and some multi-focus antennas are formed by combining a spherical surface and an arc surface, and a satellite antenna panel is a main component of the satellite antenna.

The processing procedure of the satellite antenna panel with the curved surface structure mainly comprises bending, welding, cutting, drilling and the like, wherein the cutting is a key link of the production of the satellite antenna panel, the final shape is determined, the cutting procedure mainly comprises the step of cutting the edge of the satellite antenna panel, and the cutting difficulty and the fixing difficulty are increased due to the arc-shaped structure of the satellite panel.

When the existing cutting mechanism is used for a satellite antenna panel, in order to keep the edge cutting smooth and uniform, the cutting work needs to be completed at one time, and for the purpose, chinese patent CN212526956U discloses an arc-shaped satellite antenna panel edge cutting device, which comprises a clamping mechanism, and comprises a cylindrical upper clamping block and a cylindrical lower clamping block, wherein the upper clamping block can rotate along the central axis of the upper clamping block, a clamping cylinder is connected below the lower clamping block, the bottom end of the clamping cylinder is connected with a turntable, the top end of the lower clamping block is connected with an elastic supporting plate, the bottom end of the supporting plate is rotatably connected with a plurality of supporting rods, the bottom end of each supporting rod is rotatably connected with an adjusting plate, the adjusting plate is sleeved on the clamping cylinder, the bottom end of the adjusting plate is connected with a plurality of adjusting cylinders, and the adjusting cylinders are fixed on the turntable; the cutting mechanism is used for cutting the edge of the antenna panel and comprises a cutting circular knife and a cutting plate. The utility model discloses a backup pad bending angle is adjustable, and the backup pad top surface closely laminates with the antenna panel bottom surface, is applicable to the centre gripping of different model antenna panels, and application range is wide, and the cutting circular knife cooperates in the recess when cutting antenna panel, guarantees the cutting effect.

However, this kind of cutting mode has very big shortcoming, firstly, adorn the satellite antenna panel between last grip block and lower grip block during the cutting, the grip block below is connected with the centre gripping cylinder, centre gripping cylinder bottom is connected with the carousel, it rotates through fixed satellite panel and drive satellite panel, make cutting mechanism cut satellite panel all around, this kind of mode causes satellite panel skew in the cutting process easily, will avoid this problem, it is tight enough to need the centre gripping, the too tight centre gripping can cause the deformation of satellite panel centre gripping department, lead to the satellite panel to scrap. This cutting mechanism of second is used for cutting antenna panel edge, including cutting circular knife and cutting board, through the cutting circular knife cutting, the clout under the cutting can't in time be handled, leads to the clout under the cutting too long can cause irregular tearing because of the influence of gravity, leads to the satellite panel to scrap, consequently needs a design arc satellite antenna panel edge cutting device urgently to solve above-mentioned problem.

Disclosure of Invention

The invention aims to provide a device for cutting the edge of a panel of an arc satellite antenna, which aims to solve the problems that the satellite panel is easy to deviate in the cutting process and the satellite panel is scrapped due to irregular tearing caused by gravity influence when the cut excess material is too long, which are provided by the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: an arc satellite antenna panel edge cutting device comprises a base, a support frame, a stepping motor and a satellite panel, wherein the support frame is fixed on the upper surface of the base through bolts, the stepping motor is fixed on the upper surface of the support frame through bolts, a balance seat is movably connected to the lower surface of the support frame, a positioning detection assembly is fixed on the lower surface of the balance seat, a cutting assembly is fixed on the side surface of the balance seat and comprises a connecting arm and a first air cylinder, the connecting arm is fixedly connected with the balance seat through bolts, a cutting machine is movably connected to one end, away from the balance seat, of the connecting arm, an edge opposite clamping mechanism is fixed on the outer surface of the cutting machine, a first connecting rod is movably connected to the output end of the first air cylinder, one end, away from the first air cylinder, of the first connecting rod is movably connected with the edge opposite clamping mechanism, and a fixing assembly is fixed on the upper surface of the base, the satellite panel is fixed on the fixing component.

Preferably, the output end of the stepping motor is sleeved with a driving bevel gear, the top end of the balance seat is rotatably connected with the support frame through a rotating shaft, a driven bevel gear is fixed at the top end of the rotating shaft, and the driving bevel gear is meshed with the driven bevel gear.

Preferably, the edge is to pressing from both sides the mechanism and is included the fixed plate, the fixed plate passes through the bolt and is fixed with the surface connection of cutting machine, the surface mounting of fixed plate has the second cylinder, and the output of second cylinder rotates through the articulated shaft and is connected with the second connecting rod, the one end that the second connecting rod deviates from the second cylinder rotates through the articulated shaft and is connected with the connecting block, and the side of connecting block is passed through the articulated shaft and is connected with the bottom rotation of fixed plate.

Preferably, the one end that the connecting block deviates from the second connecting rod is rotated through the bearing and is connected with the clamp roll, the clamp roll comprises circle axle and rubber sleeve, and the circle axle passes through the bearing and is connected with the connecting block rotation, and the one end parcel that the circle axle deviates from the connecting block has rubber sleeve, the top of fixed plate is fixed with the connecting pile.

Preferably, the output of first cylinder passes through the articulated shaft and is connected with first connecting rod rotation, the one end that first connecting rod deviates from first cylinder passes through the articulated shaft and is connected with the connection stake rotation, the one end that the linking arm deviates from balanced seat passes through the articulated shaft and is connected with the fixed plate rotation.

Preferably, fixed subassembly includes the shell, the upper surface connection that screw and base were passed through to the bottom of shell is fixed, the upper surface fixed of shell has lift positioning mechanism, lift positioning mechanism includes fixed sleeve, fixed sleeve passes through the bolt and is fixed with the upper surface connection of shell, fixed sleeve's inside lift is connected with the rack, the bottom meshing of rack has the gear, the center department of gear is fixed with the connecting axle, the connecting axle runs through the shell and rotates with the shell to be connected, and the connecting axle deviates from the one end of gear and has cup jointed the hand wheel, the top of rack is fixed with the tray, the surface evenly fixed of tray has the setting element.

Preferably, the setting element includes the sleeve pipe, the sleeve pipe passes through the screw and is fixed with the last surface connection of tray, sheathed tube inside telescopic connection has the ejector pin, the bottom cover of ejector pin is equipped with the spring, the both ends of spring offset with the surface of tray and ejector pin respectively, the top of ejector pin is rotated through the articulated shaft and is connected with the second clamping bar, the bottom of second clamping bar is rotated through the articulated shaft and is connected with first clamping bar, and the bottom of first clamping bar is passed through the articulated shaft and is connected with sheathed tube inner wall rotation.

Preferably, the location determine module includes the connecting pipe, the top of connecting pipe is connected fixedly with the lower surface of balanced seat, the bottom telescopic connection of connecting pipe has the telescopic link, the bottom mounting of telescopic link has the cross laser instrument, the cross laser instrument is the cross.

Compared with the prior art, the invention has the beneficial effects that: this arc satellite antenna panel edge cutting device has the edge and to pressing from both sides the mechanism, can hold up the clout, avoids the clout overweight to cause the edge irregular tear, and the quick even edge of cutting satellite panel of being convenient for can not cause the skew of satellite panel.

(1) The cutting machine is arranged on the connecting arm, the balance seat is driven to rotate through the stepping motor, and the connecting arm can be driven to rotate, so that the cutting machine is driven to rotate to cut the edge of the satellite panel, and the problem that the rotating satellite panel is easy to deviate is avoided;

(2) through assembling the edge butt clamp mechanism on the cutting machine, when the cutting machine cuts the satellite panel, stretch out through the piston rod in the second cylinder and promote the second connecting rod and push the connecting block and rotate, make the connecting block drive the outer wall that presss from both sides the roller and contradict the satellite panel, form the centre gripping with the blade on the cutting machine to the edge of satellite panel, when the cutting machine is rotatory cutting, the excess stock under the cutting can be held up to the clamp roller, the problem of irregular tearing caused by the gravity influence after having solved the excess stock overlength is solved, improve the cutting yield.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic side view of the present invention;

FIG. 3 is a schematic view of the edge-clamping mechanism of FIG. 2;

FIG. 4 is a schematic cross-sectional elevation view of the housing and lift positioning mechanism of FIG. 1;

FIG. 5 is a cross-sectional view of the positioning member shown in FIG. 1;

FIG. 6 is a schematic view of a connection structure between the positioning member and the satellite panel in FIG. 2;

fig. 7 is a schematic top sectional view taken along line a-a in fig. 4.

In the figure: 1. a base; 2. a support frame; 3. a stepping motor; 4. a balance seat; 5. a cutting assembly; 501. a connecting arm; 502. a first cylinder; 503. a first link; 504. a cutter; 505. an edge butt-clamping mechanism; 5051. a fixing plate; 5052. a second link; 5053. connecting blocks; 5054. a nip roll; 5055. connecting piles; 5056. a second cylinder; 6. a satellite panel; 7. a fixing assembly; 701. a housing; 702. a lifting positioning mechanism; 7021. fixing the sleeve; 7022. a rack; 7023. a connecting shaft; 7024. a gear; 7025. a hand wheel; 703. a tray; 704. a positioning member; 7041. a sleeve; 7042. a top rod; 7043. a first clamping bar; 7044. a second clamping bar; 7045. a spring; 8. positioning the detection assembly; 801. a connecting pipe; 802. a telescopic rod; 803. a cross laser.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, an embodiment of the present invention is shown: the utility model provides an arc satellite antenna panel edge cutting device, the on-line screen storage device comprises a base 1, support frame 2, step motor 3 and satellite panel 6, as shown in fig. 1-2, satellite panel 6 is the arc, like the pot form, the upper surface of base 1 has support frame 2 through the bolt fastening, the upper surface of support frame 2 has step motor 3 through the bolt fastening, the lower surface swing joint of support frame 2 has balanced seat 4, the side of balanced seat 4 is fixed with cutting assembly 5, as shown in fig. 2, the right side of balanced seat 4 is outstanding, weight inclines to the right side, behind the 4 left side installation cutting assembly 5 of balanced seat, just in time kept balanced seat 4 and controlled balanced.

As shown in fig. 2, the cutting assembly 5 includes a connecting arm 501 and a first cylinder 502, the connecting arm 501 is connected and fixed with the balancing base 4 through a bolt, one end of the connecting arm 501 away from the balancing base 4 is movably connected with a cutting machine 504, an edge clamping mechanism 505 is fixed on an outer surface of the cutting machine 504, an output end of the first cylinder 502 is movably connected with a first connecting rod 503, one end of the first connecting rod 503 away from the first cylinder 502 is movably connected with the edge clamping mechanism 505, the first cylinder 502 stretches and retracts to push the first connecting rod 503, so that the first connecting rod 503 pushes the cutting machine 504 to rotate on the connecting arm 501, a cutting angle of the cutting machine 504 can be adjusted, a fixing assembly 7 is fixed on an upper surface of the base 1, and the satellite panel 6 is fixed on the fixing assembly 7.

Further, as shown in fig. 1, the output end of the stepping motor 3 is sleeved with a driving bevel gear, the top end of the balance seat 4 is rotatably connected with the support frame 2 through a rotating shaft, a driven bevel gear is fixed at the top end of the rotating shaft, the driving bevel gear is meshed with the driven bevel gear, the stepping motor 3 drives the driven bevel gear to rotate through the driving bevel gear, so that the driven bevel gear drives the balance seat 4 to rotate through the rotating shaft, the cutting machine 504 can be driven to rotate, and the edge of the satellite panel 6 is annularly cut.

Further, as shown in fig. 1 to 3, the edge-butting mechanism 505 includes a fixing plate 5051, the fixing plate 5051 is fixed to the outer surface of the cutting machine 504 by bolts, a second cylinder 5056 is fixed to the outer surface of the fixing plate 5051, an output end of the second cylinder 5056 is pivotally connected to a second link 5052 by a hinge shaft, an end of the second link 5052 away from the second cylinder 5056 is pivotally connected to a connecting block 5053 by a hinge shaft, and a side surface of the connecting block 5053 is pivotally connected to a bottom end of the fixing plate 5051 by a hinge shaft, the second cylinder 5056 drives the second link 5052 to pull or push the connecting block 5053, and can drive the connecting block 5053 to pivot on the fixing plate 5051, so that the connecting block 5053 is turned over, the connecting block 5053 is in an unfolded state in fig. 3, and the connecting block 5053 is in a folded working state in fig. 2.

Further, as shown in fig. 1-3, one end of the connecting block 5053 away from the second connecting rod 5052 is rotatably connected with a clamp roller 5054 through a bearing, the clamp roller 5054 is composed of a circular shaft and a rubber sleeve, the circular shaft is rotatably connected with the connecting block 5053 through a bearing, one end of the circular shaft away from the connecting block 5053 is wrapped with a rubber sleeve, the rubber material avoids scratching the surface of the satellite panel 6 when abutting against the satellite panel 6, the clamp roller 5054 is rotatably connected with the connecting block 5053, when the cutting machine 504 rotates, the clamp roller 5054 can roll on the surface of the satellite panel 6, a connecting pile 5055 is fixed at the top end of the fixing plate 5051, the output end of the first cylinder 502 is rotatably connected with the first connecting rod 503 through a hinge shaft, one end of the first connecting rod 503 away from the first cylinder 502 is rotatably connected with the connecting pile 5055 through a hinge shaft, one end of the connecting arm 501 away from the balance seat 4 is rotatably connected with the fixing plate 5051 through a hinge shaft, the first cylinder 502 pushes or pulls the first connecting rod 503, the first link 503 can push the cutter 504 or pull the cutter 504 to turn over on the link 501, so as to conveniently adjust the cutting angle of the cutter 504.

Further, as shown in fig. 4, the fixing component 7 includes a housing 701, the bottom end of the housing 701 is connected and fixed with the upper surface of the base 1 through a screw, a lifting positioning mechanism 702 is fixed on the upper surface of the housing 701, the lifting positioning mechanism 702 includes a fixing sleeve 7021, the fixing sleeve 7021 is connected and fixed with the upper surface of the housing 701 through a bolt, a rack 7022 is connected in a lifting manner inside the fixing sleeve 7021, sliding strips are integrally connected to both sides of the rack 7022, the sliding strips are connected with the fixing sleeve 7021 in a sliding manner, a gear 7024 is engaged with the bottom of the rack 7022, a connecting shaft 7023 is fixed at the center of the gear 7024, the connecting shaft 7023 penetrates through the housing 701 and is rotatably connected with the housing 701, a spring plate is abutted between the connecting shaft 7023 and the housing 701, damping between the connecting shaft 7023 and the housing 701 is improved, stability of the connecting shaft 7023 when the connecting shaft is stopped is maintained, and a handwheel 7025 is sleeved at one end of the connecting shaft 7023 away from the gear 7024, the hand wheel 7025 is convenient to hold, the tray 703 is fixed at the top end of the rack 7022, the shape of the inner wall of the tray 703 is matched with the shape of the bottom of the satellite panel 6, the hand wheel 7025 is rotated to drive the connecting shaft 7023 to rotate, so that the connecting shaft 7023 drives the rack 7022 to lift in the fixed sleeve 7021 through the gear 7024 to drive the tray 703 to lift, and the height of the satellite panel 6 is adjusted.

Further, as shown in fig. 2 and 5, a positioning member 704 is uniformly fixed on the outer surface of the tray 703, the positioning member 704 includes a sleeve 7041, the sleeve 7041 is fixedly connected to the upper surface of the tray 703 through a screw, an ejector rod 7042 is telescopically connected inside the sleeve 7041, a spring 7045 is sleeved at the bottom of the ejector rod 7042, two ends of the spring 7045 respectively abut against the outer surfaces of the tray 703 and the ejector rod 7042, the top end of the ejector rod 7042 is rotatably connected to a second clamping bar 7044 through a hinge shaft, the bottom end of the second clamping bar 7044 is rotatably connected to a first clamping bar 7043 through a hinge shaft, the bottom end of the first clamping bar 7043 is rotatably connected to the inner wall of the sleeve 7041 through a hinge shaft, the first clamping bar 7043 and the second clamping bar 7044 are both two in number and arranged in a diamond shape, and the first clamping bar 7043 and the second clamping bar 7044 arranged in a diamond shape can better fix the satellite panel 6 after being folded, as shown in fig. 6;

the spring 7045 plays a role of providing elasticity for the ejector rod 7042, the spring 7045 in fig. 5 is in a contracted state, the spring 7045 in fig. 2 is in an expanded state, when the satellite panel 6 is fixed on the tray 703, the ejector rod 7042 is pushed to rise first to push the second clamping rod 7044 and the first clamping rod 7043 to retract inwards, so that the positioning piece 704 can be inserted into the positioning hole at the bottom of the satellite panel 6, then the ejector rod 7042 is released, the ejector rod 7042 descends by the elasticity of the spring 7045 to drive the second clamping rod 7044 and the first clamping rod 7043 to fold outwards, and the bottom of the inner wall of the satellite panel 6 can be buckled, so that the satellite panel 6 is fixed on the fixing component 7.

Further, as shown in fig. 2, the lower fixed surface of the balance seat 4 is provided with a positioning detection assembly 8, the positioning detection assembly 8 comprises a connecting pipe 801, the top end of the connecting pipe 801 is fixedly connected with the lower surface of the balance seat 4, the bottom end of the connecting pipe 801 is telescopically connected with a telescopic rod 802, dampers are arranged in the telescopic rod 802 and the connecting pipe 801, the dampers between the telescopic rod 802 and the connecting pipe 801 are improved, the telescopic rod 802 can hover at any height, the bottom end of the telescopic rod 802 is provided with a cross laser 803, the cross laser 803 is in a cross shape, laser lamps are arranged on four sides of the cross laser 803, the four laser lamps can irradiate laser on the satellite panel 6 when working simultaneously, and the cutting depth or the cutting position can be adjusted as auxiliary coordinates.

Claims

1. The utility model provides an arc satellite antenna panel edge cutting device, includes base (1), support frame (2), step motor (3) and satellite panel (6), the upper surface of base (1) is through the bolt fastening have support frame (2), the upper surface of support frame (2) is through the bolt fastening have step motor (3), its characterized in that: the lower surface swing joint of support frame (2) has balanced seat (4), the lower fixed surface of balanced seat (4) has location detection subassembly (8), the side of balanced seat (4) is fixed with cutting assembly (5), cutting assembly (5) include linking arm (501) and first cylinder (502), linking arm (501) are connected fixedly through bolt and balanced seat (4), the one end swing joint that linking arm (501) deviates from balanced seat (4) has cutting machine (504), and the external surface of cutting machine (504) is fixed with edge butt clamp mechanism (505), the output swing joint of first cylinder (502) has first connecting rod (503), and the one end that first connecting rod (503) deviates from first cylinder (502) and edge butt clamp mechanism (505) swing joint, the upper surface of base (1) is fixed with fixed subassembly (7), the satellite panel (6) is fixed on the fixing component (7).

2. The microsatellite antenna panel edge cutting apparatus as recited in claim 1 wherein: the output end of the stepping motor (3) is sleeved with a driving bevel gear, the top end of the balance seat (4) is rotatably connected with the support frame (2) through a rotating shaft, a driven bevel gear is fixed at the top end of the rotating shaft, and the driving bevel gear is meshed with the driven bevel gear.

3. The microsatellite antenna panel edge cutting apparatus as recited in claim 1 wherein: the edge butt-clamping mechanism (505) comprises a fixing plate (5051), the fixing plate (5051) is fixedly connected with the outer surface of the cutting machine (504) through a bolt, a second cylinder (5056) is fixed on the outer surface of the fixing plate (5051), the output end of the second cylinder (5056) is rotatably connected with a second connecting rod (5052) through a hinged shaft, one end, departing from the second cylinder (5056), of the second connecting rod (5052) is rotatably connected with a connecting block (5053) through a hinged shaft, and the side face of the connecting block (5053) is rotatably connected with the bottom end of the fixing plate (5051) through a hinged shaft.

4. The microsatellite antenna panel edge cutting apparatus as recited in claim 3 wherein: one end, deviating from the second connecting rod (5052), of the connecting block (5053) is rotatably connected with a clamping roller (5054) through a bearing, the clamping roller (5054) consists of a circular shaft and a rubber sleeve, the circular shaft is rotatably connected with the connecting block (5053) through the bearing, one end, deviating from the connecting block (5053), of the circular shaft is wrapped by the rubber sleeve, and a connecting pile (5055) is fixed to the top end of the fixing plate (5051).

5. The microsatellite antenna panel edge cutting apparatus as recited in claim 4 wherein: the output end of the first cylinder (502) is rotatably connected with a first connecting rod (503) through a hinge shaft, one end, deviating from the first cylinder (502), of the first connecting rod (503) is rotatably connected with a connecting pile (5055) through the hinge shaft, and one end, deviating from the balance seat (4), of the connecting arm (501) is rotatably connected with a fixing plate (5051) through the hinge shaft.

6. The microsatellite antenna panel edge cutting apparatus as recited in claim 1 wherein: the fixing component (7) comprises a shell (701), the bottom end of the shell (701) is fixedly connected with the upper surface of the base (1) through a screw, a lifting positioning mechanism (702) is fixed on the upper surface of the shell (701), the lifting positioning mechanism (702) comprises a fixed sleeve (7021), the fixed sleeve (7021) is fixedly connected with the upper surface of the shell (701) through a bolt, a rack (7022) is connected to the inside of the fixed sleeve (7021) in a lifting manner, a gear (7024) is meshed at the bottom of the rack (7022), a connecting shaft (7023) is fixed at the center of the gear (7024), the connecting shaft (7023) penetrates through the shell (701) and is in rotary connection with the shell (701), and one end of the connecting shaft (7023) departing from the gear (7024) is sleeved with a hand wheel (7025), a tray (703) is fixed at the top end of the rack (7022), and positioning pieces (704) are uniformly fixed on the outer surface of the tray (703).

7. The microsatellite antenna panel edge cutting apparatus as recited in claim 6 wherein: the setting element (704) includes sleeve pipe (7041), the last surface connection that sleeve pipe (7041) passes through screw and tray (703) is fixed, the inside telescopic connection of sleeve pipe (7041) has ejector pin (7042), the bottom cover of ejector pin (7042) is equipped with spring (7045), the both ends of spring (7045) offset with the surface of tray (703) and ejector pin (7042) respectively, the top of ejector pin (7042) is rotated through the articulated shaft and is connected with second clamping bar (7044), the bottom of second clamping bar (7044) is rotated through the articulated shaft and is connected with first clamping bar (7043), and the bottom of first clamping bar (7043) is passed through the articulated shaft and is connected with the inner wall rotation of sleeve pipe (7041).

8. The microsatellite antenna panel edge cutting apparatus as recited in claim 1 wherein: location determine module (8) are including connecting pipe (801), the top of connecting pipe (801) is connected fixedly with the lower surface of balanced seat (4), the bottom telescopic connection of connecting pipe (801) has telescopic link (802), the bottom mounting of telescopic link (802) has cross laser instrument (803), cross laser instrument (803) are the cross.