Low-carbon-emission drilling equipment in building construction process

Abstract

The invention discloses low-carbon-emission drilling equipment in the building construction process, and belongs to the technical field of building construction. Rotating shafts are arranged at the vertical ends of the L-shaped mounting frames, a rotating plate is arranged between the two rotating shafts, the side face of the rotating plate is fixedly connected to the rotating shafts, a plurality of first telescopic rods which are evenly distributed in the circumferential direction are arranged on the upper surface of the rotating plate, and one ends of the first telescopic rods are fixed to the rotating plate; a mounting plate is arranged at the other end of the first telescopic rod, a driving motor is arranged in the middle of the mounting plate, a drill rod is arranged on an output shaft of the driving motor, a plurality of second telescopic rods which are evenly distributed in the circumferential direction are arranged at the other end of the rotating plate, and one ends of the second telescopic rods are fixed to the rotating plate; a pressing plate is arranged at the other end of the second telescopic rod, and a supporting pipe is arranged in the middle of the lower surface of the pressing plate. According to the technical scheme, the problems that existing drilling equipment cannot adjust the drilling angle according to needs, and construction requirements are difficult to meet are solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of building construction, and particularly relates to a low-carbon drilling equipment in a building construction process. BACKGROUND

[0002] Low-carbon buildings need to drill holes in the foundation of the construction site during construction, and drilling equipment is needed in this process. The existing low-carbon building construction foundation drilling equipment disclosed in CN116398043A comprises a mounting frame, a drilling structure fixed to the top surface of the mounting frame, a shielding disc fixed to the drilling structure, a soil retaining structure connected to the bottom surface of the mounting frame, the soil retaining structure comprising a pressing plate, an auxiliary telescopic rod and a vertical hydraulic cylinder fixed to the top surface of the pressing plate, a columnar tube fixed to the bottom surface of the pressing plate, a pressing round corner formed at the connection part of the columnar tube and the pressing plate, and a plug-in round corner formed on the outer wall of the columnar tube at the lower part, an installation seat fixed to the top surface of the auxiliary telescopic rod and the vertical hydraulic cylinder, the top surface of the installation seat being fixed to the mounting frame, a threaded joint rotatably connected to the output end of the auxiliary telescopic rod, and the output end of the threaded joint being fixed to the top surface of the pressing plate.

[0003] Although the invention has a protection structure for the foundation opening, it can prevent the end of the foundation hole from collapsing, but this method has the following disadvantages in actual use. Since the mounting frame and the drill rod and other components are vertically arranged, they cannot adjust the drilling angle according to the needs of the site construction, that is, they cannot drill inclined holes, and thus it is difficult to meet the construction requirements. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a low-carbon drilling equipment in a building construction process to solve the problem that the existing drilling equipment cannot adjust the drilling angle as needed and is difficult to meet the construction requirements.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] The application discloses a low-carbon emission drilling equipment in a building construction process, which comprises symmetrically arranged L-shaped mounting racks, a plurality of universal wheels are arranged on one end of the L-shaped mounting racks arranged horizontally, rotating shafts are arranged on one end of the L-shaped mounting racks arranged vertically, a rotating plate is arranged between the two rotating shafts, the side surface of the rotating plate is fixedly connected to the rotating shafts, a plurality of first telescopic rods are arranged on the upper surface of the rotating plate in a circumferential distribution mode, one end of the first telescopic rods is fixed to the rotating plate, an installation plate is arranged on the other end of the first telescopic rods, a driving motor is arranged in the middle part of the installation plate, a drill rod is arranged on the output shaft of the driving motor, a plurality of second telescopic rods are arranged on the other end of the rotating plate in a circumferential distribution mode, one end of the second telescopic rods is fixed to the rotating plate, a pressing plate is arranged on the other end of the second telescopic rods, a supporting tube is arranged in the middle part of the lower surface of the pressing plate, the supporting tube is fixed to the middle part of the pressing plate, the drill rod is arranged through the rotating plate, the installation plate and the supporting tube, rotating arms are arranged on the other end of the rotating shafts, one end of the rotating arms is fixed to the rotating shafts, and operation rods are arranged on the other end of the rotating arms.

[0007] Further, the rotating arms arranged symmetrically are provided with a fixed plate, the two ends of the fixed plate are fixed to the two rotating arms respectively, a plug-in rod is slidably arranged in the middle part of the fixed plate, a sleeve is fixedly arranged on the upper end of the plug-in rod, first connecting rods are symmetrically arranged on the upper end of the sleeve, one end of the first connecting rods is fixed to the sleeve, a deflection plate is arranged on the other end of the first connecting rods, the deflection plate is rotationally connected to the other end of the first connecting rods, second connecting rods are symmetrically arranged on the lower end of the sleeve, one end of the second connecting rods is fixed to the sleeve, connecting plates are arranged on the other end of the second connecting rods, one end of the connecting plates is fixed to the other end of the second connecting rods, a blocking pin is slidably arranged on the other end of the connecting plates, the lower surface of the deflection plate is arranged in abutment with the blocking pin, a stop rod is arranged on the upper end of the sleeve, one end of the stop rod is fixed to the sleeve, the other end of the stop rod is arranged in abutment with the upper surface of the deflection plate, a pushing plate is arranged at the edge of the installation plate, one end of the pushing plate is fixed to the installation plate, and control assemblies for controlling the contact state of the blocking pin and the deflection plate are arranged on the outer sides of the connecting plates.

[0008] Further, the control assemblies comprise a vertical plate, one end of the vertical plate is fixed to the fixed plate, the other end of the vertical plate is provided with a U-shaped groove, an end plate is arranged on the outward end of the blocking pin, the blocking pin is located in the U-shaped groove, wedge-shaped blocks are symmetrically arranged below the U-shaped groove, and when the end plate slides downward on the wedge-shaped surface of the wedge-shaped blocks, the blocking pin slides outward at the end of the connecting plate.

[0009] Further, the outer side of the wedge-shaped block is provided with a contact plate arranged obliquely, the upper end of the contact plate is in contact with the outer side of the end plate, the lower end of the contact plate is provided with a limiting spring on both sides, and the two ends of the limiting spring are fixedly connected to the contact plate and the vertical plate respectively, when the end plate moves upward on the wedge surface of the wedge-shaped block, the contact plate is used to push the blocking pin to slide inward at the end of the connecting plate.

[0010] Further, the upper end of the sleeve is symmetrically provided with a mounting rod, one end of the mounting rod is fixed to the sleeve, the other end of the mounting rod is provided with a tension spring, one end of the tension spring is fixed to the mounting rod, and the other end of the tension spring is fixed to the deflection plate.

[0011] Further, the first telescopic rod and the second telescopic rod are hydraulic rods or electric telescopic rods.

[0012] Further, a plurality of limiting rods are circumferentially arranged on the surface of the pressing plate facing downward.

[0013] Further, the pushing plate comprises a lower plate and an upper plate, one end of the upper plate is rotatably connected to one end of the lower plate, a baffle is arranged on the end of the lower plate, the baffle is used to limit the upward rotation of the upper plate, an inclined plate is further arranged on the end of the lower plate, the inclined plate is provided with a reset spring, and the reset spring connects the upper plate to the inclined plate.

[0014] The beneficial effects of the present application are:

[0015] (1) In the technical solution, when a slant hole needs to be drilled, the worker only needs to hold the connecting rod and rotate it, so as to drive the rotating plate to rotate, and then drive the drill rod to tilt, and then adjust the drilling angle according to actual needs; (2) By setting the control assembly and the movement of the mounting plate during drilling, the automatic insertion and automatic extraction of the plug-in rod can be realized, so as to ensure the stability of the device during drilling, and avoid the problem that the device is self-rotated due to the reaction force.

[0016] Other advantages, objects, and features of the present application will be apparent from the following specification and claims, and will be learned from the practice of the present application by those skilled in the art. The objects and other advantages of the present application can be achieved and obtained by the following specification. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to make the purpose, technical scheme and beneficial effects of the present application clearer, the present application provides the following drawings for illustration:

[0018] Figure 1 It is a perspective view of the drilling device of the present application;

[0019] Figure 2 A perspective view of the drilling device from another angle of the invention;

[0020] Figure 3 A perspective view of the control assembly part of the drilling device of the invention;

[0021] Figure 4 A perspective view of the upper part of the control assembly of the drilling device of the invention;

[0022] Figure 5 A plan view of the pushing plate of the invention.

[0023] The reference signs in the drawings are as follows:

[0024] 1, L-shaped mounting bracket; 2, rotating shaft; 3, rotating plate; 4, first telescopic rod; 5, mounting plate; 6, driving motor; 7, drill rod; 8, second telescopic rod; 9, pressing plate; 10, support tube; 11, limiting rod; 12, rotating arm; 13, operating rod; 14, fixed plate; 15, vertical plate; 16, plug-in rod; 17, sleeve; 18, first connecting rod; 19, deflection plate; 20, blocking rod; 21, second connecting rod; 22, connecting plate; 23, blocking pin; 24, contact plate; 25, wedge block; 26, U-shaped groove; 27, limiting spring; 28, mounting rod; 29, tension spring; 30, pushing plate; 31, lower plate; 32, upper plate; 33, baffle; 34, inclined plate; 35, return spring. DETAILED DESCRIPTION

[0025] As shown in Figures 1-5 , a low-carbon drilling device in the construction process, comprising symmetrically arranged L-shaped mounting bracket 1, the horizontal end of the L-shaped mounting bracket 1 is provided with a plurality of universal wheels, the vertical end of the L-shaped mounting bracket 1 is provided with rotating shaft 2, rotating plate 3 is arranged between the two rotating shafts 2, the side surface of the rotating plate 3 is fixedly connected to the rotating shaft 2, the upper surface of the rotating plate 3 is provided with a plurality of circumferentially distributed first telescopic rods 4, one end of the first telescopic rod 4 is fixed to the rotating plate 3, the other end of the first telescopic rod 4 is provided with mounting plate 5, the middle part of the mounting plate 5 is provided with driving motor 6, the output shaft of the driving motor 6 is provided with drill rod 7, the other end of the rotating plate 3 is provided with a plurality of circumferentially distributed second telescopic rods 8, one end of the second telescopic rod 8 is fixed to the rotating plate 3, the other end of the second telescopic rod 8 is provided with pressing plate 9, the lower surface of the pressing plate 9 is provided with support tube 10 in the middle part, the support tube 10 is fixed to the middle part of the pressing plate 9, the drill rod 7 is arranged through the rotating plate 3, the mounting plate 5 and the support tube 10, the other end of the rotating shaft 2 is provided with rotating arm 12, one end of the rotating arm 12 is fixed to the rotating shaft 2, the other end of the rotating arm 12 is provided with operating rod 13.

[0026] The working principle of the technical solution is:

[0027] When it is necessary to drill an inclined hole, only need the staff to hold the operating rod 13 and rotate, and then drive the rotating plate 3 to rotate, and then drive the drill rod 7 to be inclined, and then adjust the drilling angle according to the actual needs, of course, in the technical solution, after the drill rod 7 is drilled into the soil layer to a certain depth, only need to control the second telescopic rod 8 to move downward, and drive the supporting pipe 10 to be inserted into the port of the ground hole, and extrude and support the soil at the port, and then avoid the problem that the end of the ground hole collapses when drilling or after the drill rod 7 is taken out; It also needs to be explained that in the technical solution, the telescopic rod and other components can be arranged between the rotating plate 3 and the mounting plate 5 to ensure the stability of the drill rod 7 during work. And a hydraulic drive rod can be arranged between the L-shaped mounting frame 1 and the connecting rod, both ends of the hydraulic drive rod are rotatably connected to the L-shaped mounting frame 1 and the connecting rod, that is, the rotating arm 12 can be driven to rotate by the hydraulic rod, and then the drilling angle is adjusted.

[0028] In an implementable manner, the rotating arms 12 arranged symmetrically are provided with a fixed plate 14, both ends of the fixed plate 14 are fixed on the two rotating arms 12, the middle part of the fixed plate 14 is slidably provided with a plug-in rod 16, the upper end of the plug-in rod 16 is fixedly provided with a sleeve 17, the upper end of the sleeve 17 is symmetrically provided with a first connecting rod 18, one end of the first connecting rod 18 is fixed on the sleeve 17, the other end of the first connecting rod 18 is provided with a deflection plate 19, the deflection plate 19 is rotatably connected to the other end of the first connecting rod 18, the lower end of the sleeve 17 is symmetrically provided with a second connecting rod 21, one end of the second connecting rod 21 is fixed on the sleeve 17, the other end of the second connecting rod 21 is provided with a connecting plate 22, one end of the connecting plate 22 is fixed on the other end of the second connecting rod 21, the other end of the connecting plate 22 is slidably provided with a blocking pin 23, the lower surface of the deflection plate 19 is arranged in abutment with the blocking pin 23, the upper end of the sleeve 17 is provided with a stop rod 20, one end of the stop rod 20 is fixed on the sleeve 17, the other end of the stop rod 20 is arranged in abutment with the upper surface of the deflection plate 19, the edge of the mounting plate 5 is provided with a push plate 30, one end of the push plate 30 is fixed on the mounting plate 5, the outer side of the connecting plate 22 is provided with a control component for controlling the contact state of the blocking pin 23 and the deflection plate 19.

[0029] The working principle of the technical solution is:

[0030] When the first telescopic rod 4 moves downward, the installation plate 5 also moves downward, thereby driving the push plate 30 to move downward, so that the push plate 30 and the deflection plate 19 are in contact. At this time, under the action of the blocking pin 23 and the sleeve 17, the deflection plate 19 cannot rotate, that is, the push plate 30 drives the deflection plate 19 to move downward, thereby driving the insertion rod 16 to move downward, thereby inserting into the ground, limiting the rotation of the device, thereby avoiding the problem that the device as a whole rotates under the action of the reaction force during drilling, resulting in poor drilling effect. Of course, it is not difficult to understand that the end of the insertion rod 16 inserted into the ground can be provided with multiple insertion ends, further improving the rotation limiting effect. When the insertion rod 16 is inserted to a specified depth, the blocking pin 23 is manually pulled out, thereby allowing it to disengage from the limiting of the deflection plate 19. At this time, under the action of the push plate 30, the deflection plate 19 rotates to avoid, that is, at this time, the insertion rod 16 does not continue to move, that is, at this time, the drill rod 7 contacts the soil layer to start drilling. When drilling is completed, the blocking pin 23 and the deflection plate 19 are reset, that is, at this time, the push plate 30 contacts the deflection plate 19 during upward movement, and the deflection plate 19 cannot be deflected upward under the action of the blocking rod 20. Under the action of the push plate 30, the insertion rod 16 moves upward, thereby extracting the insertion rod 16 from the soil body.

[0031] In an implementable manner, the control assembly includes a vertical plate 15, one end of the vertical plate 15 is fixed to the fixed plate 14, and the other end of the vertical plate 15 is provided with a U-shaped groove 26. The end plate (not shown) provided on the outward end of the blocking pin 23 is located in the U-shaped groove 26. The wedge-shaped blocks 25 are symmetrically arranged below the U-shaped groove 26. When the end plate slides downward on the wedge surface of the wedge-shaped block 25, the blocking pin 23 slides outward at the end of the connecting plate 22. That is, when the end of the blocking pin 23 enters the U-shaped groove 26, the end plate contacts the wedge surface and automatically moves outward under the guidance of the wedge surface, thereby realizing the automatic disengagement of the blocking pin 23 and the deflection plate 19.

[0032] In an implementable manner, the outer side of the wedge-shaped block 25 is provided with an inclined contact plate 24, the upper end of the contact plate 24 is in contact with the outer side of the end plate, and the lower end of the contact plate 24 is provided with a limiting spring 27 on the outer side of the two side surfaces. The two ends of the limiting spring 27 are respectively fixedly connected to the contact plate 24 and the vertical plate 15. When the end plate moves upward on the wedge surface of the wedge-shaped block 25, the contact plate 24 is used to drive the blocking pin 23 to slide inward at the end of the connecting plate 22.

[0033] The contact plate 24 is arranged, when the blocking pin 23 is lowered, the blocking pin 23 overcomes the elastic force of the upper limiting spring 27 of the contact plate 24 to move outward, and when the deflection plate 19 is lifted by the pushing plate 30, the end plate gradually loses the blocking of the wedge surface, and then is pressed inward by the end of the contact plate 24 to push the blocking pin 23 to reset under the resetting action of the limiting spring 27.

[0034] In an implementable mode, the pushing plate 30 comprises a lower plate 31 and an upper plate, one end of the upper plate is rotationally connected to one end of the lower plate 31 (L-shaped), a baffle 33 is arranged on the end of the lower plate 31, the baffle 33 is used to limit the upward rotation of the upper plate, and an inclined plate 34 is further arranged on the end of the lower plate 31, the inclined plate 34 is provided with a reset spring 35, and the reset spring 35 connects the upper plate to the inclined plate 34.

[0035] The pushing plate 30 is arranged in this way, when the pushing plate 30 drives the deflection plate 19 to move downward, at this time, since the deflection plate 19 is located between the upper plate and the lower plate 31, the deflection plate 19 is pushed downward by the upper plate until it is separated after being pushed to the position, and during the upward movement (resetting) of the pushing plate 30, the upper plate and the deflection plate 19 are in contact, the lower plate 31 is deflected downward to avoid, and then the deflection plate 19 enters between the upper plate and the lower plate 31, that is, the deflection plate 19 is driven upward by the lower plate 31, that is, in this arrangement, the deflection plate 19 can be driven downward and upward by the pushing plate 30 without manual intervention, and the use effect is better, the automation degree is higher, and of course the arrangement of the inclined plate 34 and the reset spring 35 facilitates the resetting of the upper plate after deflection, and also ensures the spacing between the upper plate and the lower plate 31, avoids the adhesion of the two, and causes the upper plate 32 to be unable to move above the deflection plate 19.

[0036] In an implementable mode, the upper end of the sleeve pipe 17 is symmetrically provided with a mounting rod 28, one end of the mounting rod 28 is fixed to the sleeve pipe 17, a tension spring 29 is arranged on the other end of the mounting rod 28, one end of the tension spring 29 is fixed to the mounting rod 28, and the other end of the tension spring 29 is fixed to the deflection plate 19. The arrangement of the tension spring 29 and the mounting rod 28 enables the deflection plate 19 to automatically reset to the contact position with the blocking rod 20 after losing the action force of the pushing plate 30, and resets after being separated from the pushing plate 30, and the blocking pin 23 resets during the lifting of the drill rod 7 after the drilling is completed, that is, the blocking pin 23 is located below the deflection plate 19 after resetting, which is convenient for use next time drilling.

[0037] In an implementable mode, the first telescopic rod 4 and the second telescopic rod 8 are both hydraulic rods or electric telescopic rods. In an implementable mode, a plurality of limiting rods 11 are circumferentially arranged on the downward surface of the pressing plate 9, and the limiting rods 11 are arranged to be inserted into the periphery of the ground hole under the action of the second telescopic rod 8, thereby playing a role of auxiliary rotation limiting.

[0038] Finally, it should be pointed out that the above preferred embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application.

Claims

1. A low carbon emission drilling apparatus in a building construction process, characterized by: The utility model provides a kind of L-shaped mounting bracket (1) of symmetrical arrangement, the end of the horizontal arrangement of the L-shaped mounting bracket (1) is equipped with several universal wheels, the vertical end of the L-shaped mounting bracket (1) is equipped with rotating shaft (2), rotating plate (3) is equipped between two rotating shaft (2), the side of rotating plate (3) is fixedly connected on rotating shaft (2), the upper surface of rotating plate (3) is equipped with several first telescopic rods (4) of circumferentially distributed, one end of first telescopic rod (4) is fixed on rotating plate (3), the other end of first telescopic rod (4) is equipped with mounting plate (5), the middle part of mounting plate (5) is equipped with drive motor (6), the output shaft of drive motor (6) is equipped with drill rod (7), the other end of rotating plate (3) is equipped with several second telescopic rods (8) of circumferentially distributed, one end of second telescopic rod (8) is fixed on rotating plate (3), the other end of second telescopic rod (8) is equipped with pressing plate (9), the lower surface middle part of pressing plate (9) is equipped with support tube (10), support tube (10) is fixed with the middle part of pressing plate (9), drill rod (7) passes through rotating plate (3), mounting plate (5) and support tube (10) setting, the other end of rotating shaft (2) is equipped with rotating arm (12), one end of rotating arm (12) is fixed on rotating shaft (2), the other end of rotating arm (12) is equipped with operating lever (13).

2. A low carbon emission drilling apparatus in a building construction process according to claim 1, characterized in that: The fixed plate (14) is equipped between the rotating arm (12) of symmetrical arrangement, the both ends of the fixed plate (14) are respectively fixed on two rotating arms (12), the middle part of the fixed plate (14) is slidably equipped with the spigot rod (16), the upper end of the spigot rod (16) is fixedly equipped with the sleeve pipe (17), the upper end of the sleeve pipe (17) is symmetrically equipped with the first connecting rod (18), one end of the first connecting rod (18) is fixed on the sleeve pipe (17), the other end of the first connecting rod (18) is equipped with the deflector plate (19), the deflector plate (19) is rotatably connected to the other end of the first connecting rod (18), the lower end of the sleeve pipe (17) is symmetrically equipped with the second connecting rod (21), one end of the second connecting rod (21) is fixed on the sleeve pipe (17), the other end of the second connecting rod (21) is equipped with the connecting plate (22), one end of the connecting plate (22) is fixed on the other end of the second connecting rod (21), the other end of the connecting plate (22) is slidably equipped with the blocking pin (23), the lower surface of the deflector plate (19) is arranged in conjunction with the blocking pin (23), the upper end of the sleeve pipe (17) is equipped with the stop rod (20), one end of the stop rod (20) is fixed on the sleeve pipe (17), the other end of the stop rod (20) is arranged in conjunction with the upper surface of the deflector plate (19), the edge of the mounting plate (5) is equipped with the push plate (30), one end of the push plate (30) is fixed on the mounting plate (5), the outside of the connecting plate (22) is equipped with control assembly for controlling the contact state of the blocking pin (23) and the deflector plate (19).

3. A low carbon emission drilling apparatus in a building construction process according to claim 2, characterized in that: The control assembly comprises a vertical plate (15), one end of the vertical plate (15) is fixed on a fixed plate (14), the other end of the vertical plate (15) is provided with a U-shaped groove (26), the end plate is arranged on the outward end of the blocking pin (23), the blocking pin (23) is located in the U-shaped groove (26), the wedge-shaped blocks (25) are symmetrically arranged below the U-shaped groove (26), when the end plate slides downward on the wedge surface of the wedge-shaped blocks (25), the blocking pin (23) slides outward on the end of the connecting plate (22).

4. A low carbon emission drilling apparatus in a building construction process according to claim 3, characterized in that: The outer side of the wedge-shaped blocks (25) is provided with the inclined contact plate (24), the upper end of the contact plate (24) is in contact with the outer side of the end plate, the lower end of the contact plate (24) is provided with the limiting spring (27) on the outer side of the two side surfaces, the two ends of the limiting spring (27) are fixedly connected to the contact plate (24) and the vertical plate (15) respectively, when the end plate moves upward on the wedge surface of the wedge-shaped blocks (25), the contact plate (24) is used to push the blocking pin (23) to slide inward on the end of the connecting plate (22).

5. A low carbon emission drilling apparatus in a building construction process as claimed in claim 2 wherein: The upper end of the sleeve (17) is symmetrically provided with the mounting rod (28), one end of the mounting rod (28) is fixed on the sleeve (17), the other end of the mounting rod (28) is provided with the tension spring (29), one end of the tension spring (29) is fixed on the mounting rod (28), the other end of the tension spring (29) is fixed on the deflection plate (19).

6. A low carbon emission drilling apparatus in a building construction process as claimed in claim 1 wherein: The first telescopic rod (4) and the second telescopic rod (8) are hydraulic rods or electric telescopic rods.

7. A low carbon emission drilling apparatus in a building construction process as claimed in claim 1 wherein: A plurality of limiting rods (11) are circumferentially arranged on the downward surface of the pressing plate (9).

8. A low carbon emission drilling apparatus in a building construction process as claimed in claim 2 wherein: The pushing plate (30) comprises a lower plate (31) and an upper plate, one end of the upper plate is rotatably connected to one end of the lower plate (31), the end of the lower plate (31) is provided with a baffle (33), the baffle (33) is used to limit the upward rotation of the upper plate, the end of the lower plate (31) is further provided with an inclined plate (34), the inclined plate (34) is provided with a reset spring (35), the reset spring (35) connects the upper plate to the inclined plate (34).

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