CN210160836U

CN210160836U - Contour cutting device with safeguard function for building engineering construction

Info

Publication number: CN210160836U
Application number: CN201920571982.8U
Authority: CN
Inventors: 王开友; 张玉俊; 罗强; 刘湘贵
Original assignee: Guizhou Zhongjian Zhongbang Construction Engineering Co Ltd
Current assignee: Guizhou Zhongjian Zhongbang Construction Engineering Co Ltd
Priority date: 2019-04-25
Filing date: 2019-04-25
Publication date: 2020-03-20
Anticipated expiration: 2029-04-25

Abstract

The utility model discloses a profile modeling cutting device is used in building engineering construction with safeguard function, the utility model relates to an auxiliary construction equipment technical field includes the base, the both sides at base top all are provided with first locating plate and second locating plate, the surface threaded connection of first locating plate has positioning bolt, positioning bolt's right side runs through the left side of first locating plate and extend to the right side of first locating plate. This profile modeling cutting device for building engineering construction with safeguard function can carry out diversified regulation and profile modeling cutting through the control handle, and cutting angle and position are adjusted freely, are applicable to not unidimensional work piece and carry out the profile modeling cutting processing, and the practicality is stronger, and the outside of cutter is provided with protective structure simultaneously, plays the guard action to the cutter, and the effectual dust and the piece of avoiding splashing when the cutting of avoiding improves the security performance that uses, avoids at the in-process of cutting, takes place the phenomenon that the mistake touched.

Description

Contour cutting device with safeguard function for building engineering construction

Technical Field

The utility model relates to an auxiliary construction equipment technical field specifically is a profile modeling cutting device for building engineering construction with safeguard function.

Background

The profile modeling cutting machine is a high-efficiency cutting tool which is made into a template according to the shape of a workpiece and enables a cutting torch to run according to the shape track of the template to automatically cut.

In the prior art, in the building engineering construction process, some panels often need to be processed, and some panels need to be made into specific shapes, because the profile modeling of only small batch, if use traditional large-scale production machinery to process then the increase cost, a large amount of resources are wasted, and manual profile modeling cutting then wastes a large amount of time and labour, and often can produce a large amount of pieces at the in-process of profile modeling cutting, and the safety degree is low, and the practicality is low in the in-process of building construction.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides a profile modeling cutting device is used in building engineering construction with safeguard function has solved the problem that manual profile modeling cutting waste time and a large amount of labours and security are low.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a profile modeling cutting device with a protection function for building engineering construction comprises a base, wherein a first positioning plate and a second positioning plate are arranged on two sides of the top of the base, a positioning bolt is connected to the surface of the first positioning plate in a threaded manner, the right side of the positioning bolt penetrates through the left side of the first positioning plate and extends to the right side of the first positioning plate, a fixed plate is rotatably connected to one end of the positioning bolt extending to the right side of the first positioning plate, two supporting rods are fixedly connected to the top of the base, lifting rods are arranged on the tops of the two supporting rods, the tops of the supporting rods penetrate through the bottoms of the lifting rods and extend to the insides of the lifting rods, a buffer spring is arranged between the top of one side of the supporting rod extending to the inside of the lifting rod and the top of the inner wall of the lifting rod, and an adjusting device is fixedly connected to the top of, the top of the adjusting device is fixedly connected with an adjusting table through an auxiliary supporting rod, a first rotating shaft is arranged on the right side of the bottom of the adjusting table, the top of the first rotating shaft penetrates through the bottom of the adjusting table and extends to the top of the adjusting table, a first gear is fixedly connected to one side of the first rotating shaft extending to the top of the adjusting table, a second gear is meshed with the surface of the first gear, a second rotating shaft is fixedly connected to the axis of the second gear, the bottom of the second rotating shaft is rotatably connected with the top of the adjusting table, a first belt pulley is fixedly connected to the position, above the second gear, of the surface of the first belt pulley, a second belt pulley is connected to the surface of the first belt pulley through belt transmission, a third rotating shaft is fixedly connected to the axis of the second belt pulley, and the bottom of the third rotating shaft penetrates through the bottom of the adjusting table and extends to the bottom of the adjusting table, the right side of the first rotating shaft and the left side of the third rotating shaft are both provided with a telescopic device, the bottoms of the two telescopic devices are both provided with a connecting rod, the surfaces of the two connecting rods are both provided with auxiliary linkage plates, the bottoms of the two connecting rods are respectively fixedly connected with a first mounting plate and a second mounting plate, the bottom of the first mounting plate is provided with a conical nail, the top of the first mounting plate is provided with an L-shaped handle, the top of the second mounting plate is provided with a driving motor, the output end of the driving motor is provided with a cutter, the bottom of the second mounting plate is provided with a protective box, the bottom of the cutter sequentially penetrates through the top of the second mounting plate and the top of the protective box and extends to the interior of the protective box, the top of the inner wall of the protective box is provided with two auxiliary springs, and the bottoms of the, the bottom of the sliding plate is fixedly connected with a protective cover, the surface of the sliding plate is provided with a through hole, the bottom of the protective cover is provided with an auxiliary rolling groove, and the inner surface of the auxiliary rolling groove is rotatably connected with a ball.

Further, the adjusting device comprises an adjusting box, a first linkage rod is arranged on the right side of the inner wall of the adjusting box, the right side of the first linkage rod penetrates through the right side of the inner wall of the adjusting box and extends to the outside of the adjusting box, a first adjusting plate is fixedly connected to the left side of the first linkage rod, a first toothed plate is arranged at the bottom of the left side of the first adjusting plate, the top of the first toothed plate is engaged with an auxiliary gear, the axis of the auxiliary gear is rotationally connected with the inner surface of the adjusting box through an auxiliary rotating shaft, and the top of the surface of the auxiliary gear is rotatably connected with a second toothed plate, the left side of the second toothed plate is fixedly connected with a second adjusting plate, the left side fixedly connected with second linkage pole of second regulating plate, the left side of second linkage pole is run through the left side of regulating box inner wall and extend to the outside of regulating box.

Further, the telescopic device comprises a linkage rod and a sliding shaft, the left side of the linkage rod is fixed on the right side of the first rotating shaft, the right side of the linkage rod penetrates through the left side of the sliding shaft and extends to the inside of the sliding shaft, a return spring is arranged on one side of the linkage rod extending to the inside of the sliding shaft, and an auxiliary sliding plate is fixedly connected to the right side of the linkage rod extending to the inside of the sliding shaft.

Further, the bottom of fixed plate is provided with first sliding block, the top of base be provided with the first sliding tray of first sliding block looks adaptation.

Furthermore, the bracing piece is located the inside both sides of lifter are provided with the second sliding block, the both sides of lifter inner wall all be provided with the second sliding tray of second sliding block looks adaptation.

Furthermore, the inner surface of the auxiliary linkage plate is provided with an auxiliary hole, the inner surface of the auxiliary hole is in transmission connection with the surface of the connecting rod, and the left side of the auxiliary linkage plate is fixedly connected with one side of the first linkage rod penetrating to the outside of the adjusting box.

Further, the inside of the protection cover is of a hollow structure, and the bottom of the protection cover penetrates through the bottom of the inner wall of the protection box and extends to the outside of the protection box.

Compared with the prior art, the beneficial effects of the utility model are that: this a profile modeling cutting device is used in building engineering construction with safeguard function, through being provided with adjusting device and telescoping device, and the bottom of telescoping device is provided with the connecting rod, the surface of connecting rod is provided with supplementary gangboard, can carry out diversified regulation and profile modeling cutting through the control handle, cutting angle and position are adjusted freely, work piece suitable for not unidimensional carries out the profile modeling cutting processing, the practicality is stronger, the outside of cutter is provided with protective structure simultaneously, play the guard action to the cutter, effectually avoid dust and piece to splash when the cutting, improve the security performance of using, avoid at the in-process of cutting, the phenomenon that the emergence mistake touched.

Drawings

Fig. 1 is a schematic overall structure diagram of the present invention;

FIG. 2 is a schematic view of the adjusting device of FIG. 1 according to the present invention;

FIG. 3 is a schematic view of the telescopic device shown in FIG. 1 according to the present invention;

FIG. 4 is a schematic structural view of a portion of the auxiliary linkage plate of FIG. 1 according to the present invention;

FIG. 5 is an enlarged view of the point A of FIG. 1 according to the present invention;

fig. 6 is an enlarged view of the point B in fig. 5 according to the present invention.

In the figure: 1-base, 2-first positioning plate, 3-second positioning plate, 4-positioning bolt, 5-fixing plate, 6-supporting rod, 7-lifting rod, 8-buffer spring, 9-adjusting device, 91-adjusting box, 92-first linkage rod, 93-first adjusting plate, 94-first toothed plate, 95-auxiliary gear, 96-second toothed plate, 97-second adjusting plate, 98-second linkage rod, 10-auxiliary supporting rod, 11-adjusting table, 12-first rotating shaft, 13-first gear, 14-second gear, 15-second rotating shaft, 16-first belt pulley, 17-belt, 18-second belt pulley, 19-third rotating shaft, 20-telescoping device, 201-fixing shaft, 202-sliding shaft, 203-return spring, 204-auxiliary sliding plate, 21-connecting rod, 22-auxiliary linkage plate, 23-auxiliary hole, 24-first mounting plate, 25-conical nail, 26-L-shaped handle, 27-second mounting plate, 28-driving motor, 29-cutter, 30-protective box, 31-auxiliary spring, 32-sliding plate, 33-protective cover, 34-through hole, 35-auxiliary rolling groove and 36-rolling ball.

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.

Referring to fig. 1-6, the present invention provides a technical solution: a copying cutting device with a protection function for construction engineering comprises a base 1, wherein a first positioning plate 2 and a second positioning plate 3 are arranged on two sides of the top of the base 1, a positioning bolt 4 is connected to the surface of the first positioning plate 2 in a threaded manner, the right side of the positioning bolt 4 penetrates through the left side of the first positioning plate 2 and extends to the right side of the first positioning plate 2, a fixing plate 5 is rotatably connected to one end of the positioning bolt 4 extending to the right side of the first positioning plate 2, a first sliding block is arranged at the bottom of the fixing plate 5, a first sliding groove matched with the first sliding block is arranged at the top of the base 1, the positions of the second positioning plates 3 on two sides of the base 1 are mutually symmetrical and matched with the cutting position of a copying cutting structure, a processing plate is conveniently fixed and calibrated, a copying template workpiece is placed in a fixing structure on the right side of the top of the base, the workpiece to be processed is placed on a fixed structure on the left side of the top of the base 1, the two workpieces are respectively contacted and fixed with the corresponding second positioning plates 3, the top of the base 1 is fixedly connected with two support rods 6, the tops of the two support rods 6 are respectively provided with a lifting rod 7, the top of each support rod 6 penetrates through the bottom of the lifting rod 7 and extends into the lifting rod 7, a buffer spring 8 is arranged between the top of one side of the support rod 6 extending into the lifting rod 7 and the top of the inner wall of the lifting rod 7, the two sides of each support rod 6 positioned in the lifting rod 7 are provided with second sliding blocks, the two sides of the inner wall of the lifting rod 7 are respectively provided with second sliding grooves matched with the second sliding blocks, the top of the lifting rod 7 is fixedly connected with an adjusting device 9, each adjusting device 9 comprises an adjusting box 91, and the right side of the inner wall of, the right side of the first linkage rod 92 penetrates through the right side of the inner wall of the adjusting box 91 and extends to the outside of the adjusting box 91, the left side of the first linkage rod 92 is fixedly connected with a first adjusting plate 93, a first toothed plate 94 is arranged at the bottom of the left side of the first adjusting plate 93, teeth are uniformly arranged on the surface of the top of the first toothed plate 94, an auxiliary gear 95 is meshed at the top of the first toothed plate 94, the axis of the auxiliary gear 95 is rotatably connected with the inner surface of the adjusting box 91 through an auxiliary rotating shaft, a second toothed plate 96 is rotatably connected at the top of the surface of the auxiliary gear 95, teeth with the same tooth surface as the first toothed plate 94 are arranged at the bottom of the second toothed plate 96, a second adjusting plate 97 is fixedly connected at the left side of the second toothed plate 96, the top and the bottom of the first slave adjusting plate 93 and the top and the bottom of the second adjusting plate 97 are both slidably connected with the top and the bottom, and the top and the bottom of the inner wall of the first adjusting box 91 are respectively provided with a third sliding groove matched with a third sliding block, the left side of the second adjusting plate 97 is fixedly connected with a second linkage rod 98, the left side of the second linkage rod 98 penetrates the left side of the inner wall of the adjusting box 91 and extends to the outside of the adjusting box 91, the relative positions of the conical nails 25 and the cutters 29 on the two sides in the left-right movement are the same through the adjusting device 9, the range of profile modeling cutting is wider, the practicability of the profile modeling cutting device is improved, the top of the adjusting device 9 is fixedly connected with an adjusting platform 11 through an auxiliary support rod 10, the right side of the bottom of the adjusting platform 11 is provided with a first rotating shaft 12, the top of the first rotating shaft 12 penetrates the bottom of the adjusting platform 11 and extends to the top of the adjusting platform 11, a first gear 13 is fixedly connected to one side of the first rotating shaft 12 extending to the top of the adjusting platform 11, the, the size of the first gear 13 is completely the same as that of the second gear, a second rotating shaft 15 is fixedly connected to the axis of the second gear 14, the bottom of the second rotating shaft 15 is rotatably connected to the top of the adjusting table 11, a first belt pulley 16 is fixedly connected to the position, above the second gear 14, of the surface of the second rotating shaft 15, a second belt pulley 18 is connected to the surface of the first belt pulley 16 through a belt 17 in a transmission manner, a third rotating shaft 19 is fixedly connected to the axis of the second belt pulley 18, the sizes of the first belt pulley 16 and the second belt pulley 18 are completely the same, so that the third rotating shaft 19 can be driven to rotate at the same rotating speed and torque when the first rotating shaft 12 rotates, the size and the size of the profile-cutting workpiece are stably adjusted to be consistent, the bottom of the third rotating shaft 19 penetrates through the bottom of the adjusting table 11 and extends to the bottom of the adjusting table 11, the surface of the third rotating shaft 19 is rotatably connected with the surface of the adjusting table 11, the right side of the first rotating shaft 12 and the left side of the third rotating shaft 19 are both provided with a telescopic device 20, the telescopic device 20 comprises a linkage rod 201 and a sliding shaft 202, the left side of the linkage rod 201 is fixed on the right side of the first rotating shaft 12, the right side of the linkage rod 201 on the third rotating shaft 19 is fixedly connected with the left side of the third rotating shaft 19, the right side of the linkage rod 201 penetrates through the left side of the sliding shaft 202 and extends into the sliding shaft 202, a return spring 203 is arranged on one side of the linkage rod 201 extending into the sliding shaft 202, the right side of the linkage rod 201 extending into the sliding shaft 202 is fixedly connected with an auxiliary sliding plate 204, the top and the bottom of the auxiliary sliding plate 204 are both slidably connected with the top and the bottom of the inner wall of the sliding shaft 202 through a fourth sliding block, the top of the inner wall of the sliding shaft 202 and the bottom of the, under the action of the telescopic devices 20 and the auxiliary linkage plates 22, the connecting rod 21 on the right side can drive the connecting rod 21 on the right side to move and rotate correspondingly when moving or rotating, so as to meet the requirement of multi-directional profile cutting, the connecting rods 21 are arranged at the bottoms of the two telescopic devices 20, the auxiliary linkage plates 22 are arranged on the surfaces of the two connecting rods 21, auxiliary holes 23 are formed in the inner surfaces of the auxiliary linkage plates 22, the inner surfaces of the auxiliary holes 23 are in transmission connection with the surfaces of the connecting rods 21, the left sides of the auxiliary linkage plates 22 are fixedly connected with one side of the first linkage rod 92 penetrating to the outer part of the adjusting box 91, the auxiliary linkage plates 22 are the auxiliary linkage plates 22 connecting the connecting rods 21, and the relative positions of the auxiliary linkage plates 22 on the left side of the adjusting device 9 are mutually symmetrical with the auxiliary linkage plates 22 on the right side of the adjusting device 9 through, the mounting structures are the same, the bottoms of the two connecting rods 21 are respectively fixedly connected with a first mounting plate 24 and a second mounting plate 27, the bottom of the first mounting plate 24 is provided with a conical nail 25, the surface of the conical nail 25 is sleeved with a rolling slip ring, a user can conveniently move the conical nail 25 in the cutting process, the top of the first mounting plate 24 is provided with an L-shaped handle 26, the top of the second mounting plate 27 is provided with a driving motor 28, the driving motor 28 is externally connected with a power supply and a control switch, the output end of the driving motor 28 is provided with a cutter 29, the bottom of the second mounting plate 27 is provided with a protection box 30, the bottom of the cutter 29 sequentially penetrates through the top of the second mounting plate 27 and the top of the protection box 30 and extends into the protection box 30, the top of the inner wall of the protection box 30 is provided with two auxiliary springs 31, and, both sides of the sliding plate 32 are slidably connected with both sides of the inner wall of the protective box 30 through a fifth sliding block, both sides of the inner wall of the protective box 30 are provided with fifth sliding grooves matched with the fifth sliding block, the bottom of the sliding plate 32 is fixedly connected with a protective cover 33, the interior of the protective cover 33 is of a hollow structure, the bottom of the protective cover 33 penetrates through the bottom of the inner wall of the protective box 30 and extends to the exterior of the protective box 30, the surface of the sliding plate 32 is provided with a through hole 34, the surface of the cutting knife 29 penetrates through the surface of the through hole 34 and extends to the bottom of the through hole 34, the inner surface of the through hole 34 is not in contact with the surface of the cutting knife 29, the bottom of the protective cover 33 is provided with an auxiliary rolling groove 35, the inner surface of the auxiliary rolling groove 35 is rotatably connected with a ball 36, the bottom of the protective cover 33 and the bottom, cover whole cutter 29, improve the security performance of using, avoid at the in-process of cutting, take place the phenomenon that the mistake touched.

When the device works, a template workpiece and a workpiece to be processed are respectively placed on the right side and the left side of the top of a base 1, the positioning bolts 4 on the two sides are sequentially adjusted, the positioning bolts 4 on the two sides respectively drive fixing plates 5 on the two sides to fix and position the template workpiece and the workpiece to be processed, an L-shaped handle 26 is held by a hand, a driving motor 28 is started, the driving motor 28 drives a cutter 29 to rotate, the whole cutting device is driven by the L-shaped handle 26 to move up and down on a supporting rod 6, when the L-shaped handle 26 moves downwards, a conical nail 25 is placed into a surface processing trace of the template workpiece to move, when the L-shaped handle 26 drives a connecting rod 21 on a first mounting plate 24 to move left and right, the connecting rod 21 drives a first linkage rod 92 to move left and right through an auxiliary linkage plate 22, so as to drive a first toothed plate 94, the first toothed plate 94 drives a second toothed plate 96 to synchronously move, thereby drive left cutting structure deformity and remove, use light convenient, at the in-process of cutter 29 cutting, dust and piece splash are avoided in the time of can effectually avoiding cutting to protection casing 33, cover whole cutter 29, improve the security performance of using, avoid at the in-process of cutting, take place the phenomenon that the mistake touched.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a contour cutting device for building engineering construction with safeguard function, includes base (1), its characterized in that: the two sides of the top of the base (1) are respectively provided with a first positioning plate (2) and a second positioning plate (3), the surface of the first positioning plate (2) is in threaded connection with a positioning bolt (4), the right side of the positioning bolt (4) penetrates through the left side of the first positioning plate (2) and extends to the right side of the first positioning plate (2), one end of the positioning bolt (4) extending to the right side of the first positioning plate (2) is rotatably connected with a fixing plate (5), the top of the base (1) is fixedly connected with two supporting rods (6), the tops of the two supporting rods (6) are respectively provided with a lifting rod (7), the top of each supporting rod (6) penetrates through the bottom of the lifting rod (7) and extends to the inside of the lifting rod (7), and a buffer spring (8) is arranged between the top of one side of the lifting rod (7) extending to the inside of the lifting rod (7) and the top of the inner wall of the lifting rod (7), the top of the lifting rod (7) is fixedly connected with an adjusting device (9), the top of the adjusting device (9) is fixedly connected with an adjusting table (11) through an auxiliary support rod (10), the right side of the bottom of the adjusting table (11) is provided with a first rotating shaft (12), the top of the first rotating shaft (12) penetrates through the bottom of the adjusting table (11) and extends to the top of the adjusting table (11), the first rotating shaft (12) extends to one side of the top of the adjusting table (11) and is fixedly connected with a first gear (13), the surface of the first gear (13) is meshed with a second gear (14), the axis of the second gear (14) is fixedly connected with a second rotating shaft (15), the bottom of the second rotating shaft (15) is rotatably connected with the top of the adjusting table (11), and the surface of the second rotating shaft (15) is positioned above the second gear (14) and is fixedly connected with a first belt pulley (16), the surface of the first belt pulley (16) is connected with a second belt pulley (18) through a belt (17) in a transmission manner, a third rotating shaft (19) is fixedly connected to the axis center of the second belt pulley (18), the bottom of the third rotating shaft (19) penetrates through the bottom of the adjusting table (11) and extends to the bottom of the adjusting table (11), telescopic devices (20) are arranged on the right side of the first rotating shaft (12) and the left side of the third rotating shaft (19), connecting rods (21) are arranged at the bottoms of the two telescopic devices (20), auxiliary linkage plates (22) are arranged on the surfaces of the two connecting rods (21), first mounting plates (24) and second mounting plates (27) are fixedly connected to the bottoms of the two connecting rods (21) respectively, conical nails (25) are arranged at the bottoms of the first mounting plates (24), and L-shaped handles (26) are arranged at the tops of the first mounting plates (24), the top of the second mounting plate (27) is provided with a driving motor (28), the output end of the driving motor (28) is provided with a cutter (29), a protective box (30) is arranged at the bottom of the second mounting plate (27), the bottom of the cutting knife (29) sequentially penetrates through the top of the second mounting plate (27) and the top of the protective box (30) and extends into the protective box (30), the top of the inner wall of the protective box (30) is provided with two auxiliary springs (31), the bottoms of the two auxiliary springs (31) are fixedly connected with a sliding plate (32), the bottom of the sliding plate (32) is fixedly connected with a protective cover (33), the surface of the sliding plate (32) is provided with a through hole (34), the bottom of the protective cover (33) is provided with an auxiliary rolling groove (35), and the inner surface of the auxiliary rolling groove (35) is rotatably connected with a ball (36).

2. The contour cutting device for constructional engineering construction having a guard function as set forth in claim 1, wherein: the adjusting device (9) comprises an adjusting box (91), a first linkage rod (92) is arranged on the right side of the inner wall of the adjusting box (91), the right side of the first linkage rod (92) penetrates through the right side of the inner wall of the adjusting box (91) and extends to the outside of the adjusting box (91), a first adjusting plate (93) is fixedly connected to the left side of the first linkage rod (92), a first toothed plate (94) is arranged at the bottom of the left side of the first adjusting plate (93), an auxiliary gear (95) is meshed with the top of the first toothed plate (94), the axis of the auxiliary gear (95) is rotatably connected with the inner surface of the adjusting box (91) through an auxiliary rotating shaft, the top of the surface of the auxiliary gear (95) is rotatably connected with a second toothed plate (96), a second adjusting plate (97) is fixedly connected to the left side of the second toothed plate (96), and a second linkage rod (98) is fixedly connected to the left side of the second adjusting plate (97), the left side of the second linkage rod (98) penetrates through the left side of the inner wall of the adjusting box (91) and extends to the outside of the adjusting box (91).

3. The contour cutting device for constructional engineering construction having a guard function as set forth in claim 1, wherein: the telescopic device (20) comprises a linkage rod (201) and a sliding shaft (202), the left side of the linkage rod (201) is fixed to the right side of the first rotating shaft (12), the right side of the linkage rod (201) penetrates through the left side of the sliding shaft (202) and extends to the inside of the sliding shaft (202), a return spring (203) is arranged on one side of the linkage rod (201) extending to the inside of the sliding shaft (202), and an auxiliary sliding plate (204) is fixedly connected to the right side of the linkage rod (201) extending to the inside of the sliding shaft (202).

4. The contour cutting device for constructional engineering construction having a guard function as set forth in claim 1, wherein: the bottom of fixed plate (5) is provided with first sliding block, the top of base (1) be provided with the first sliding tray of first sliding block looks adaptation.

5. The contour cutting device for constructional engineering construction having a guard function as set forth in claim 1, wherein: the bracing piece (6) are located the inside both sides of lifter (7) are provided with the second sliding block, the both sides of lifter (7) inner wall all be provided with the second sliding tray of second sliding block looks adaptation.

6. The contour cutting device for constructional engineering construction having a guard function as set forth in claim 2, wherein: the inner surface of the auxiliary linkage plate (22) is provided with an auxiliary hole (23), the inner surface of the auxiliary hole (23) is in transmission connection with the surface of the connecting rod (21), and the left side of the auxiliary linkage plate (22) is fixedly connected with one side, penetrating through the first linkage rod (92), of the outer portion of the adjusting box (91).

7. The contour cutting device for constructional engineering construction having a guard function as set forth in claim 1, wherein: the interior of the protective cover (33) is of a hollow structure, and the bottom of the protective cover (33) penetrates through the bottom of the inner wall of the protective box (30) and extends to the outside of the protective box (30).