CN213620215U

CN213620215U - Novel unmanned aerial vehicle support frame for environmental monitoring

Info

Publication number: CN213620215U
Application number: CN202022314922.3U
Authority: CN
Inventors: 池翔; 何国旋
Original assignee: Guangdong Air Technology Co ltd
Current assignee: Guangdong Air Technology Co ltd
Priority date: 2020-10-17
Filing date: 2020-10-17
Publication date: 2021-07-06
Anticipated expiration: 2030-10-17

Abstract

The utility model discloses a novel unmanned aerial vehicle support frame for environmental monitoring, including bearing bottom plate and the mount pad of setting above bearing bottom plate, bearing bottom plate symmetry is provided with two sets ofly, two sets ofly bearing bottom plate opposite side symmetry sets up two sets of circular slots that supply extension axle movable mounting, and two sets of one side of bearing bottom plate opposite is fixed to be provided with the solid fixed ring of cover on extending the axle outer fringe face, be provided with the cross bolt on the outer fringe face of solid fixed ring, the equidistance is seted up multiunit and is supplied the screw hole of cross bolt installation on the outer fringe face of extension axle, two sets of bearing bottom plate's lower terminal surface one side is seted up the sliding tray, the fixed sliding tray that is provided with a set of sliding shaft in the sliding tray, this novel unmanned aerial vehicle support frame for environmental monitoring, rational in infrastructure, be convenient for adapt to the installation demand of different unmanned aerial, simultaneously, the utility model is convenient for providing anti-tilt protection and has strong practicability.

Description

Novel unmanned aerial vehicle support frame for environmental monitoring

Technical Field

The utility model belongs to the technical field of environmental monitoring, concretely relates to novel unmanned aerial vehicle support frame for environmental monitoring.

Background

The environmental monitoring is to track the change of environmental quality and determine the environmental quality level by detecting the content and the discharge of various substances which have influence on human beings and the environment, thereby providing a foundation and guarantee for the work of environmental management, pollution treatment and the like. In short, understanding the environmental level and monitoring the environment are the prerequisite for developing all the environmental works, and the environmental monitoring generally includes the processes of background investigation, scheme determination, optimized distribution, on-site sampling, sample transportation, experimental analysis, data collection, analysis synthesis and the like. In general, the process of obtaining information is planning-sampling-analyzing-integrating.

Environmental monitoring adopts unmanned aerial vehicle to go on more, unmanned aerial vehicle is equipped with the support frame usually, the support frame plays important effect at taking off and descending in-process of unmanned aerial vehicle, current unmanned aerial vehicle support frame size after dispatching from the factory is just with fixed, be not convenient for adapt to different unmanned aerial vehicle's installation demand, the limitation of use is higher, and current unmanned aerial vehicle strutting arrangement can not play fine cushioning effect when descending, the great easy damage that causes of vibrational force that unmanned aerial vehicle descending in-process received to inside part, unmanned aerial vehicle's life has been reduced, unmanned aerial vehicle is when descending, the screw rotates can make unmanned aerial vehicle and ground produce an effort, the condition of easily taking place to turn on one's side during descending, current support frame is not convenient for provide anti-tilt protection, the practicality is.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel unmanned aerial vehicle support frame for environmental monitoring to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a novel unmanned aerial vehicle support frame for environment monitoring comprises a bearing bottom plate and a mounting seat arranged above the bearing bottom plate, wherein the bearing bottom plate is symmetrically provided with two groups, two groups of opposite sides of the bearing bottom plate are symmetrically provided with two groups of circular grooves for movably mounting an extension shaft, opposite sides of the two groups of bearing bottom plates are fixedly provided with fixing rings sleeved on the outer edge surface of the extension shaft, cross bolts are arranged on the outer edge surface of the fixing rings, and a plurality of groups of threaded holes for mounting the cross bolts are equidistantly formed in the outer edge surface of the extension shaft;

two sets of the sliding tray has been seted up to bearing bottom plate's lower terminal surface one side, the sliding tray internal fixation is provided with a set of sliding shaft, sliding fit installs the sliding block on the outer fringe face of sliding shaft, the lower terminal surface of sliding block extends the sliding tray and two sets of engaging lugs of symmetry fixedly connected with in the middle, and articulates between the both sides of sliding block and the tip of sliding tray and installs a set of cover and establish the first spring outside the sliding shaft.

Preferably, it is two sets of the activity is provided with a set of circle axle between the engaging lug, and the activity is provided with U type support frame on the outer fringe face of circle axle, U type support frame symmetry is provided with two sets ofly, and the lower terminal surface of two sets of U type support frames all has the gyro wheel, two sets of through round pin axle movable mounting one side of U type support frame is fixed between two parties and is provided with the sleeve.

Preferably, a buffer bin for the second spring to be hinged and installed is arranged in the sleeve, one end of the second spring is hinged and connected with a T-shaped crimping plate, and one side of the T-shaped crimping plate is fixedly connected with a buffer shaft extending out of the sleeve.

Preferably, two sets of T type spouts have all been seted up to two sets of bearing bottom plate's up end symmetry, sliding fit installs T type slider in the T type spout, the up end of T type slider extend T type spout and with the lower terminal surface fixed connection of mount pad, the mounting hole has been seted up between two parties to the up end of mount pad, and one side of mount pad installs fixing bolt.

Preferably, the fixed support column that is provided with in lower terminal surface one side of bearing the weight of the bottom plate, the support column prolongs vertical direction and is provided with two sets ofly, and is two sets of all set up in the support column and supply to extend the storehouse of placing of post movable mounting, place the articulated buffer spring that is provided with between the bottom in storehouse and the extension post.

Preferably, two sets of rectangle recesses have all been seted up to the equal symmetry in both sides of bearing the bottom plate, and the equal symmetry in both sides of bearing the bottom plate is provided with two sets of anti-tilt devices, the rectangle recess internal fixation is provided with the roller bearing, sliding fit installs the regulating block on the outer fringe face of roller bearing, adjusts two sets of otic placodes of quick one side extension rectangle recess and symmetry fixedly connected with placed in the middle.

Preferably, the anti-tilt device includes bracing piece and extension rod, and is two sets of install the loose axle between the otic placode, set up the round hole of cooperation loose axle installation in the extension rod, and the one end of extension rod extends to bracing piece in and fixedly connected with butt joint board, the lower terminal surface both sides structure of bracing piece has the supporting legs, and sets up the shock attenuation storehouse in the bracing piece, and the articulated a set of damping spring that is provided with between the bottom in shock attenuation storehouse and the lower terminal surface of butt joint board.

Preferably, the two sides of the upper end face of the bearing bottom plate are fixedly provided with vertical plates, a through groove is formed in the vertical plates in the middle, the upper end face of each vertical plate is provided with a rotating wheel, and the rotating wheels are connected with a group of adjusting shafts movably arranged in the through grooves.

Preferably, the movable block is installed in screw-thread fit on the outer fringe face of regulating spindle, and logical groove and fixedly connected with regulating plate extend to one side of movable block, the below of regulating plate is provided with the fixed plate, the up end symmetry of fixed plate is provided with two sets of fixed axles that pass the regulating plate, and articulates between the up end of fixed plate and the lower terminal surface of regulating plate to be provided with the third spring that the cover was established outside the fixed axle.

The utility model discloses a technological effect and advantage: the novel unmanned aerial vehicle support frame for environment monitoring has the advantages that due to the arrangement of the extension shafts, the two groups of bearing bottom plates can be pulled along opposite directions, so that the extension shafts extend out of the bearing bottom plates, the cross bolts are screwed into the threaded holes, the bearing bottom plates and the extension shafts are fixed in the extension shafts, the novel unmanned aerial vehicle support frame is convenient to adapt to the installation requirements of different unmanned aerial vehicles, and is high in applicability; benefit from the setting of sliding block and first spring, descend the in-process at unmanned aerial vehicle, the gyro wheel butt ground of terminal surface installation under U type support frame, make U type support frame upset certain angle, can make the sliding block slide on the outer fringe face of sliding shaft simultaneously, the sliding block is gliding can make first spring deformation provide the buffering simultaneously, be convenient for provide better cushioning effect when unmanned aerial vehicle descends, unmanned aerial vehicle's life has been promoted to a certain extent, benefit from the setting of supporting legs, when unmanned aerial vehicle descends, the butt board extrusion damping spring that the extension rod is connected, make damping spring deformation provide the buffering, supporting legs butt ground simultaneously, the condition of turning on one's side takes place when preventing to descend, be convenient for provide and prevent the protection of inclining, therefore, the clothes hanger is strong in practicability.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;

FIG. 3 is an enlarged schematic view of the structure at B in FIG. 1 according to the present invention;

FIG. 4 is an enlarged schematic view of the structure at D in FIG. 1 according to the present invention

FIG. 5 is an enlarged schematic view of the structure at E in FIG. 1 according to the present invention

FIG. 6 is a schematic structural view of the anti-roll device of the present invention

Fig. 7 is a cross-sectional view taken at C-C of fig. 6 according to the present invention.

In the figure: the anti-tilt device comprises a bearing bottom plate 1, a 101T-shaped sliding groove, a 102 sliding groove, a 2 mounting seat, a 201 mounting hole, a 202 fixing bolt, a 203T-shaped sliding block, a 3 extending shaft, a 301 threaded hole, a 4 fixing ring, a 5 sliding shaft, a 501 sliding block, a 502 first spring, a 6 connecting lug, a 7U-shaped supporting frame, an 8 sleeve, a 801 second spring, a 9 buffer shaft, a 10 supporting column, a 1001 extending column, an 11 anti-tilt device, a 12 supporting rod, a 1201 supporting leg, a 13 extending rod, a 1301 butt joint plate, a 14 damping spring, a 15 vertical plate, a 1501 through groove, a 16 rotating wheel, an adjusting shaft, a 1602 adjusting plate, a 17 fixing plate, an 18 fixing shaft, a 1801 third spring, a 19 rectangular groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Unless defined otherwise, all references to up, down, left, right, front, back, inner and outer directions herein are to be interpreted as referring to up, down, left, right, front, back, inner and outer directions in the drawings to which the invention is applied, and all references are hereby incorporated herein by reference.

The utility model provides a novel unmanned aerial vehicle support frame for environment monitoring as shown in figures 1-3, which comprises a bearing bottom plate 1 and a mounting seat 2 arranged above the bearing bottom plate 1, wherein the bearing bottom plate 1 is symmetrically provided with two groups, two groups of bearing bottom plates 1 are symmetrically provided with two groups of circular grooves for movably mounting an extension shaft 3 at opposite sides, and the two groups of bearing bottom plates 1 are fixedly provided with a fixing ring 4 sleeved on the outer edge surface of the extension shaft 3 at opposite sides, cross bolts are arranged on the outer edge surface of the fixing ring 4, a plurality of groups of threaded holes 301 for mounting the cross bolts are equidistantly arranged on the outer edge surface of the extension shaft 3, and the two groups of bearing bottom plates 1 can be pulled along opposite directions to facilitate the extension shaft 3 to extend out from the bearing bottom plate 1, and the cross bolts are screwed into the threaded holes 301 to fix the bearing bottom plate 1 and the extension shaft 3, the mounting requirements of different unmanned aerial vehicles are convenient to adapt, and the applicability is strong;

two sets of sliding tray 102 has been seted up to lower terminal surface one side of bearing bottom plate 1, sliding tray 102 internal fixation is provided with a set of sliding shaft 5, sliding fit installs sliding block 501 on the outer fringe face of sliding shaft 5, sliding block 501's lower terminal surface extends sliding tray 102 and two sets of engaging lugs 6 of symmetry fixedly connected with placed in the middle, and engaging lug 6 is curved plate structure for one end structure, and articulates between the tip of the both sides of sliding block 501 and sliding tray 102 to install a set of cover and establish first spring 502 outside sliding shaft 5.

Specifically, a group of circular shafts are movably arranged between two groups of connecting lugs 6, U-shaped supporting frames 7 are movably arranged on the outer edge surfaces of the circular shafts, roller bearings are arranged at the joints of the outer edge surfaces of the circular shafts, the U-shaped supporting frames 7 and the connecting lugs 6, the two groups of U-shaped supporting frames 7 are symmetrically arranged, rollers are movably arranged on the lower end surfaces of the two groups of U-shaped supporting frames 7 through pin shafts, sleeves 8 are fixedly arranged in the middle of one sides of the two groups of U-shaped supporting frames 7, and the sliding blocks 501 and the first springs 502 are beneficial to arrangement, when the unmanned aerial vehicle descends, the rollers arranged on the lower end surfaces of the U-shaped supporting frames 7 abut against the ground, so that the U-shaped supporting frames 7 overturn for a certain angle, meanwhile, the sliding blocks 501 can slide on the outer edge surfaces of the sliding shafts 5, the first springs 502 can be deformed to provide buffering while the sliding blocks 501 slide, and a, promote unmanned aerial vehicle's life to a certain extent.

Specifically, offer the surge bin that supplies the articulated installation of second spring 801 in the sleeve 8, the articulated T type crimping board that is connected with of one end of second spring 801, one side fixedly connected with of T type crimping board extend sleeve 8's buffering axle 9 (during the concrete implementation, during unmanned aerial vehicle descends, when U type support frame 7 overturns certain angle, can make second spring 801 receive the pulling force of buffering axle 9 and produce deformation, further realized the effect of buffering).

Specifically, two sets of T type spouts 101 have been seted up to the equal symmetry of up end of bearing bottom plate 1, sliding fit installs T type slider 203 in T type spout 101, the up end of T type slider 203 extend T type spout 101 and with the lower terminal surface fixed connection of mount pad 2, mounting hole 201 has been seted up between two parties to the up end of mount pad 2, and fixing bolt 202 is installed to one side of mount pad 2.

Specific, the fixed support column 10 that is provided with in lower terminal surface one side of load-bearing floor 1, support column 10 prolongs vertical direction and is provided with two sets ofly, two sets ofly all set up in the support column 10 and supply to extend the storehouse of placing of post 1001 movable mounting, place the bottom in storehouse and extend and articulate between the post 1001 and be provided with buffer spring (during concrete implementation, the one end that load-bearing floor 1 was kept away from to extension post 1001 has the universal wheel through round pin axle swing joint, when unmanned aerial vehicle descends, but the universal wheel butt ground for install the buffer spring butt ground in extending post 1001, the function of further promotion buffering of being convenient for plays better guard action to unmanned aerial vehicle's internals, further promoted unmanned aerial vehicle's life).

Specifically, two sets of rectangle recess 19 have all been seted up to the equal symmetry in both sides of bearing bottom plate 1, and the equal symmetry in both sides of bearing bottom plate 1 is provided with two sets of anti-tilt devices 11, rectangle recess 19 internal fixation is provided with roller bearing 20, sliding fit installs the regulating block on the outer fringe face of roller bearing 20, adjusts two sets of otic placodes 2001 of quick one side extension rectangle recess 19 and symmetry fixedly connected with placed in the middle.

Specifically, anti-tilt device 11 includes bracing piece 12 and extension rod 13, and is two sets of install the loose axle between the otic placode 2001, the round hole of cooperation loose axle installation has been seted up in the extension rod 13, and extension rod 13's one end extends to in bracing piece 12 and fixedly connected with butt board 1301, bracing piece 12's lower terminal surface both sides structure has supporting legs 1201, and has seted up the surge bin in the bracing piece 12, and the bottom of surge bin and the lower terminal surface of butt board 1301 are articulated to be provided with a set of damping spring 14 between, benefit from the setting of supporting legs 1201, when unmanned aerial vehicle descends, butt board 1301 that extension rod 13 connects extrudes damping spring 14 for damping spring 14 deformation provides the buffering, and supporting legs 1201 butt ground simultaneously prevents the circumstances that the landing takes place to turn on one's side when preventing, is convenient for provide anti-tilt protection, and.

Specifically, vertical plates 15 are fixedly arranged on two sides of the upper end face of the bearing bottom plate 1, a through groove 1501 is formed in the vertical plate 15 in the middle, a rotating wheel 16 is arranged on the upper end face of the vertical plate 15, and the rotating wheel 16 is connected with a group of adjusting shafts 1601 which are movably arranged in the through groove 1501.

Specifically, screw-thread fit installs the movable block on the outer fringe face of regulating shaft 1601, and one side of movable block extends logical groove 1501 and fixedly connected with regulating plate 1602, the below of regulating plate 1602 is provided with fixed plate 17, the up end symmetry of fixed plate 17 is provided with two sets of fixed axles 18 that pass regulating plate 1602, and articulates between the up end of fixed plate 17 and the lower terminal surface of regulating plate 1602 to be provided with the cover and establish third spring 1801 outside fixed axle 18 (during concrete implementation, rotatable runner 16 for regulating shaft 1601 rotates and drives the movable block and remove in logical groove 1501, makes regulating plate 1602 reciprocate and drive fixed plate 17 and reciprocate, and the lower terminal surface butt of fixed plate 17 is in unmanned aerial vehicle's top, is convenient for promote the fixed fastness of unmanned aerial vehicle).

Working principle, this novel unmanned aerial vehicle support frame for environmental monitoring, when using, can prolong opposite direction pulling two sets of load-bearing bottom plate 1, make extension axle 3 extend from load-bearing bottom plate 1, and through screwing cross bolt into screw hole 301, realize the fixed to load-bearing bottom plate 1 and extension axle 3 in, thereby adapt to the installation demand of different unmanned aerial vehicles, install the base of unmanned aerial vehicle in mounting hole 201, and twist fixing bolt 202 and realize the fixed to unmanned aerial vehicle, rotatable runner 16 simultaneously, make regulating shaft 1601 rotate and drive the movable block to move in logical groove 1501, make regulating plate 1602 reciprocate and drive fixed plate 17, the lower terminal surface butt of fixed plate 17 is above unmanned aerial vehicle, be convenient for further promote the fastness that unmanned aerial vehicle fixed, when unmanned aerial vehicle descends, the gyro wheel butt ground of terminal surface installation under U type support frame 7, make U type support frame 7 overturn a certain angle, meanwhile, the sliding block 501 can slide on the outer edge surface of the sliding shaft 5, the first spring 502 can be deformed to provide buffering when the sliding block 501 slides, so that a better buffering effect can be provided when the unmanned aerial vehicle lands, the second spring 801 can be deformed by the tensile force of the buffering shaft 9 when the U-shaped support frame 7 turns over for a certain angle, so that the buffering effect is further realized, the damping spring 14 is extruded by the abutting plate 1301 connected with the extension rod 13 when the unmanned aerial vehicle lands, so that the damping spring 14 is deformed to provide buffering, meanwhile, the support leg 1201 abuts against the ground, so that the situation of rollover during landing is prevented, so that the anti-roll protection is provided, the novel unmanned aerial vehicle support frame for environment monitoring has a reasonable structure, is convenient to adapt to the installation requirements of different unmanned aerial vehicles, is convenient to provide a certain degree of buffering when the unmanned aerial vehicle lands, and is convenient to provide, the practicability is strong.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides a novel unmanned aerial vehicle support frame for environmental monitoring, includes bearing bottom plate (1) and sets up mount pad (2) in bearing bottom plate (1) top, its characterized in that: two groups of bearing bottom plates (1) are symmetrically arranged, two groups of circular grooves for movably mounting the extension shaft (3) are symmetrically formed in one opposite side of each group of bearing bottom plates (1), a fixing ring (4) sleeved on the outer edge surface of each extension shaft (3) is fixedly arranged on one opposite side of each group of bearing bottom plates (1), cross bolts are arranged on the outer edge surface of each fixing ring (4), and a plurality of groups of threaded holes (301) for mounting the cross bolts are formed in the outer edge surface of each extension shaft (3) at equal intervals;

sliding tray (102) have been seted up to the lower terminal surface one side of bearing bottom plate (1), sliding tray (102) internal fixation is provided with a set of sliding shaft (5), sliding fit installs sliding block (501) on the outer fringe face of sliding shaft (5), sliding block (501)'s lower terminal surface extends sliding tray (102) and two sets of engaging lugs (6) of symmetry fixedly connected with placed in the middle, and articulates between the both sides of sliding block (501) and the tip of sliding tray (102) and installs a set of cover and establish first spring (502) outside sliding shaft (5).

2. The novel unmanned aerial vehicle support frame for environmental monitoring of claim 1, characterized in that: two sets of the activity is provided with a set of circle axle between engaging lug (6), and the activity is provided with U type support frame (7) on the outer fringe face of circle axle, U type support frame (7) symmetry is provided with two sets ofly, and the lower terminal surface of two sets of U type support frames (7) all has the gyro wheel, two sets of through selling axle movable mounting one side of U type support frame (7) is fixed sleeve (8) between two parties.

3. The novel unmanned aerial vehicle support frame for environmental monitoring of claim 2, characterized in that: the buffer bin for the second spring (801) to be installed in a hinged mode is arranged in the sleeve (8), one end of the second spring (801) is connected with a T-shaped crimping plate in a hinged mode, and one side of the T-shaped crimping plate is fixedly connected with a buffer shaft (9) extending out of the sleeve (8).

4. The novel unmanned aerial vehicle support frame for environmental monitoring of claim 1, characterized in that: two sets of T type spout (101) have all been seted up to the up end symmetry of load floor (1), sliding fit installs T type slider (203) in T type spout (101), the up end of T type slider (203) extend T type spout (101) and with the lower terminal surface fixed connection of mount pad (2), mounting hole (201) have been seted up between two parties to the up end of mount pad (2), and fixing bolt (202) are installed to one side of mount pad (2).

5. The novel unmanned aerial vehicle support frame for environmental monitoring of claim 1, characterized in that: the fixed support column (10) that is provided with in lower terminal surface one side of bearing bottom plate (1), support column (10) prolong vertical direction and be provided with two sets ofly, two sets of all set up in support column (10) and supply to extend post (1001) movable mounting place the storehouse, place the articulated buffer spring that is provided with between bottom in storehouse and the extension post (1001).

6. The novel unmanned aerial vehicle support frame for environmental monitoring of claim 1, characterized in that: two sets of rectangle recess (19) have all been seted up to the equal symmetry in both sides that bear bottom plate (1), and the equal symmetry in both sides that bears bottom plate (1) is provided with two sets of anti-tilt devices (11), rectangle recess (19) internal fixation is provided with roller bearing (20), sliding fit installs the regulating block on the outer fringe face of roller bearing (20), adjusts fast one side and extends rectangle recess (19) and two sets of otic placodes of symmetry fixedly connected with (2001) placed in the middle.

7. The novel unmanned aerial vehicle support frame for environmental monitoring of claim 6, characterized in that: anti-tilt device (11) are including bracing piece (12) and extension rod (13), and are two sets install the loose axle between otic placode (2001), set up the round hole of cooperation loose axle installation in extension rod (13), and the one end of extension rod (13) extends to bracing piece (12) in and fixedly connected with butt joint board (1301), the lower terminal surface both sides structure of bracing piece (12) has supporting legs (1201), and sets up the shock attenuation storehouse in bracing piece (12), and the articulated a set of damping spring (14) that is provided with between the bottom in shock attenuation storehouse and the lower terminal surface of butt joint board (1301).

8. The novel unmanned aerial vehicle support frame for environmental monitoring of claim 1, characterized in that: both sides of the upper end face of the bearing bottom plate (1) are fixedly provided with vertical plates (15), a through groove (1501) is formed in the vertical plates (15) in the middle, the upper end face of each vertical plate (15) is provided with a rotating wheel (16), and the rotating wheels (16) are connected with a group of adjusting shafts (1601) movably arranged in the through grooves (1501).

9. The novel unmanned aerial vehicle support frame for environmental monitoring of claim 8, characterized in that: the outer fringe face of regulating shaft (1601) goes up screw-thread fit and installs the movable block, and one side of movable block extends logical groove (1501) and fixedly connected with regulating plate (1602), the below of regulating plate (1602) is provided with fixed plate (17), the up end symmetry of fixed plate (17) is provided with two sets of fixed axle (18) of passing regulating plate (1602), and articulates between the up end of fixed plate (17) and the lower terminal surface of regulating plate (1602) to be provided with to establish third spring (1801) outside fixed axle (18).