A portable building stone cutting machine

Abstract

The present invention belongs to the technical field of building stone cutting, and in particular, relates to a portable building stone cutting machine. The present invention provides a portable building stone cutting machine that can be quickly assembled, including an N-shaped frame and an N-shaped bracket, etc.; the N-shaped frame is symmetrically and rotatably arranged on the front and rear sides of the right side surface; a bearing seat, a bearing seat is symmetrically arranged on the middle part of the upper side of the right side surface of the N-shaped frame; a first rotating shaft, a first rotating shaft is arranged between two bearing seats; a mounting sleeve, a mounting sleeve is arranged on the first rotating shaft; a workbench, the mounting sleeve is connected to the workbench, and the front and rear sides of the bottom of the workbench are spaced apart with jacks. The workbench is horizontal, and the clamping assembly can fix the workbench by unfolding the N-shaped frame and the N-shaped bracket, and the cutting assembly is removed to cooperate with the slot on the workbench. When in use, the clamping frame is clamped into the long slot plate to prevent the cutting assembly from moving when in use, and the cutting assembly can be used to cut stones.

Description

Technical Field

[0001] The invention belongs to the technical field of building stone cutting, and in particular relates to a portable building stone cutting machine. Background Art

[0002] Building stone refers to natural stone mainly used for construction or decoration. Stone cutting machines are mainly used for cutting natural (or artificial) granite and other stone slabs, stones, concrete and gypsum, and are widely used in the construction of ground and wall stone decoration projects.

[0003] The stone cutting machines we usually use are large in size and inconvenient to carry to the decoration site. Small cutting machines do not have special workbenches for placing stones. The temporary workbenches are inconvenient to operate, which can easily cause the cutting point to move, increase the error, and ultimately make it easy to cut the stone crooked when cutting, causing unnecessary waste. In response to the above situation, we provide a portable building stone cutting machine that can be quickly assembled to solve the above problems. Summary of the invention

[0004] In order to overcome the disadvantages that commonly used stone cutting machines are large in size and inconvenient to carry into the decoration site, and small cutting machines do not have a special workbench for placing stones, the present invention provides a portable building stone cutting machine that can be assembled quickly.

[0005] The technical solution is: a portable building stone cutting machine, including an N-shaped frame and an N-shaped bracket, the N-shaped bracket is symmetrically rotatably arranged on the front and rear upper right side of the N-shaped frame; a bearing seat, a bearing seat is symmetrically arranged on the middle part of the upper side of the right side surface of the N-shaped frame; a first rotating shaft, a first rotating shaft is arranged between the two bearing seats; a mounting sleeve, a mounting sleeve is arranged on the first rotating shaft; a workbench, the mounting sleeve is connected to the workbench, and the front and rear sides of the bottom of the workbench are spaced apart with sockets; a clamping assembly, a clamping assembly matching with the socket of the N-shaped frame is arranged on the upper part of the N-shaped bracket; a U-shaped frame, a U-shaped frame is arranged in the middle part of the left side wall of the N-shaped frame; a cutting assembly, a cutting assembly for stone cutting is arranged on the U-shaped frame; a support plate, a support plate for placing stones is inserted on the top of the workbench.

[0006] As a further preferred embodiment, the clamping assembly includes: a clamping shaft, a cylindrical groove is spaced apart at the top of the N-shaped bracket, and a clamping shaft is slidably arranged in the cylindrical groove; a first elastic member is arranged between the clamping shaft and the cylindrical groove; a first connecting rod, a straight groove which passes through the cylindrical groove is evenly arranged on the side wall of the N-shaped bracket, and a first connecting rod is slidably arranged in the straight groove, and the first connecting rod is connected to the clamping shaft; a shift rod, and a shift rod is connected between the first connecting rods.

[0007] As a further preferred scheme, the cutting assembly includes: a second connecting rod, a sliding block, a sliding groove is symmetrically opened on the top of the workbench, a square groove is opened at the bottom of the second connecting rod, a sliding block is slidably arranged in the square groove, and the sliding block cooperates with the sliding groove; a second elastic member, a second elastic member is arranged in the square groove; a first slide rail, a first slide rail is arranged between the upper parts of the two second connecting rods; a first slider, a first slider is slidably arranged in the first slide rail; a second slide rail, a second slide rail is vertically arranged on the front side of the top of the first slider; a second slider, a second slider is slidably arranged in the second slide rail; a third elastic member, a third elastic member is arranged between the second slider and the lower part of the second slide rail; a first mounting plate, a first mounting plate is arranged on the front side of the second slider; a circular saw cutting machine, a circular saw cutting machine is arranged on the first mounting plate.

[0008] As a further preferred scheme, it also includes a rotating component, which includes: an annular slide rail, which is clamped on the middle part of the front side of the top of the workbench; a connecting bracket, which is arranged between the inner rings of the annular slide rail; a second mounting plate, which is symmetrically arranged on the bottom of the connecting bracket; a motor, which is arranged on the front and back of the tops of the two second mounting plates; a gear, which is arranged on the output shaft of the motor; an annular frame, which is slidably arranged in the annular slide rail; a gear ring, which is arranged on the inner ring of the annular frame, and the gear ring is meshed with four gears; a rotating disk, which is arranged on the top of the annular frame.

[0009] As a further preferred scheme, it also includes an adsorption component, which includes: a cylindrical cylinder body, a cylindrical cylinder body is rotatably arranged in the middle of the connecting bracket; a moving rod, a moving rod is symmetrically and slidably arranged at the bottom of the cylindrical cylinder body; a piston, a piston is slidably arranged in the cylindrical cylinder body, and the tops of the two moving rods are connected to the bottoms of the pistons; a third connecting rod, a third connecting rod is arranged between the bottoms of the moving rods; an electric push rod, an electric push rod is arranged at the center of the bottom of the cylindrical cylinder body, and the push rod of the electric push rod is connected to the middle of the third connecting rod.

[0010] As a further preferred scheme, it also includes a fixing component, which includes: an elongated slot plate, which is symmetrically arranged on the front and back of the top of the workbench; a connecting block, a connecting block is arranged on one side of the lower part of the second connecting rod close to the elongated slot plate; a card frame, a card frame is arranged on the connecting block, and the teeth of the card frame cooperate with the teeth of the elongated slot plate.

[0011] As a further preferred scheme, it also includes a limiting mechanism, which includes: a second rotating shaft, which is provided at the front and rear lower parts of the left side wall at the top of the N-shaped frame; a fixed sleeve frame, which is provided on the second rotating shaft; an L-shaped frame, which has a square groove on the right side of the fixed sleeve frame, and the L-shaped frame is slidably provided in the square groove of the fixed sleeve frame; and a fourth elastic member, which is provided between the L-shaped frame and the square groove of the fixed sleeve frame.

[0012] As a further preferred solution, it also includes a fixing frame, which is arranged on the protective cover of the circular saw cutting machine; and a liquid sprayer, which is clamped on the fixing frame.

[0013] The present invention has the following advantages: 1. The workbench is horizontal. By unfolding the N-shaped frame and the N-shaped bracket, the clamping assembly can fix the workbench. The cutting assembly is removed and matched with the slot on the workbench. When in use, the bracket is inserted into the long slot plate to prevent the cutting assembly from moving when in use. The cutting assembly can be used to cut stone.

[0014] 2. According to the required cutting method of the stone, the rotating component or the support plate can be replaced to cooperate with the cutting component for operation.

[0015] 3. The fixed sleeve frame and L-shaped frame restrict and fix the N-shaped frame and N-shaped bracket to facilitate transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the folding structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the expanded structure of the present invention.

[0018] Figure 3 It is a schematic diagram of the exploded structure of the clamping assembly of the present invention.

[0019] Figure 4 It is a schematic diagram of the exploded structure of the cutting assembly of the present invention.

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the second connecting rod, the sliding block and the second elastic member of the present invention.

[0021] Figure 6 It is a schematic diagram of the exploded structure of the rotating assembly of the present invention.

[0022] Figure 7 It is a schematic diagram of the three-dimensional structure of the adsorption component of the present invention.

[0023] Figure 8 It is a schematic diagram of the three-dimensional structure of the elongated slot plate of the present invention.

[0024] Fig. 9 It is a schematic diagram of the three-dimensional structure of the limiting mechanism of the present invention.

[0025] Wherein: 1-N-shaped frame, 2-N-shaped bracket, 3-bearing seat, 4-mounting sleeve, 5-first rotating shaft, 6-working table, 7-clamping assembly, 71-column groove, 72-clamping shaft, 73-first elastic member, 74-slotted groove, 75-first connecting rod, 76-shift rod, 8-U-shaped frame, 9-cutting assembly, 91-second connecting rod, 92-sliding block, 93-second elastic member, 94-first slide rail, 95-first slider, 96-second slide rail, 97-second slider, 98-third elastic member, 99-first mounting plate, 910-circular saw cutting machine, 10-support plate, 11-rotating assembly, 111-annular slide rail, 112-connecting bracket, 113-second mounting plate, 114-motor, 115-gear, 116-annular frame, 117-gear ring, 118-rotating disk, 12-adsorption component, 121-cylindrical cylinder, 122-moving rod, 123-piston, 124-third connecting rod, 125-electric push rod, 13-fixed component, 131-connecting block, 132-cage, 133-long card slot plate, 14-limiting mechanism, 141-second rotating shaft, 142-fixed sleeve, 143-L-shaped frame, 144-fourth elastic member, 15-fixed frame, 16-liquid sprayer. DETAILED DESCRIPTION

[0026] The technical solution is further described below in conjunction with specific embodiments. It should be noted that the words indicating directions such as up, down, left, and right mentioned in this article are only for the position of the structure shown in the corresponding drawings. The serial numbers of the parts in this article, such as first, second, etc., are only used to distinguish the objects described and do not have any order or technical meaning. The words such as connection and coupling in this application include direct and indirect connection (coupling) unless otherwise specified.

[0027] Embodiment: A portable building stone cutting machine, such as Figure 1-Figure 9 As shown, it includes an N-shaped frame 1 and an N-shaped bracket 2, the N-shaped bracket 2 is symmetrically rotatably arranged on the front and rear sides of the right side surface of the N-shaped frame 1; a bearing seat 3, the bearing seat 3 is symmetrically welded and fixed on the middle part of the upper side of the right side surface of the N-shaped frame 1; a first rotating shaft 5, the first rotating shaft 5 is arranged between the two bearing seats 3; a mounting sleeve 4, the first rotating shaft 5 is arranged on the first rotating shaft 5; a workbench 6, the mounting sleeve 4 is connected to the workbench 6 by bolts, and the front and rear sides of the bottom of the workbench 6 are spaced apart with insertion holes; a clamping component 7, the upper part of the N-shaped bracket 2 is provided with a clamping component 7 that cooperates with the insertion hole of the N-shaped frame 1; a U-shaped frame 8, the middle part of the left side wall of the N-shaped frame 1 is provided with a U-shaped frame 8; a cutting component 9, the U-shaped frame 8 is provided with a cutting component 9 for stone cutting; a support plate 10, the top of the workbench 6 is inserted with a support plate 10 for placing stones.

[0028] like Figure 1 , Figure 2 and Figure 3As shown, the clamping assembly 7 includes: a clamping shaft 72, a cylindrical groove 71 is spaced apart at the top of the N-shaped bracket 2, and the clamping shaft 72 is slidably arranged in the cylindrical groove 71; a first elastic member 73, a first elastic member 73 is arranged between the clamping shaft 72 and the cylindrical groove 71; a first connecting rod 75, a straight groove 74 that passes through the cylindrical groove 71 is evenly opened on the side wall of the N-shaped bracket 2, a first connecting rod 75 is slidably arranged in the straight groove 74, and the first connecting rod 75 is connected to the clamping shaft 72; a shifting rod 76, and a shifting rod 76 is welded and connected between the first connecting rods 75.

[0029] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the cutting assembly 9 includes: a second connecting rod 91, a sliding block 92, a sliding groove is symmetrically opened on the top of the workbench 6, a square groove is opened at the bottom of the second connecting rod 91, a sliding block 92 is slidably arranged in the square groove, and the sliding block 92 cooperates with the sliding groove; a second elastic member 93, a second elastic member 93 is arranged in the square groove; a first slide rail 94, a first slide rail 94 is welded and fixed between the upper parts of the two second connecting rods 91; a first slider 95, a first slider 95 is slidably arranged in the first slide rail 94; a second slide rail 96, a second slide rail 96 is vertically welded and fixed on the front side of the top of the first slider 95; a second slider 97, a second slider 97 is slidably arranged in the second slide rail 96; a third elastic member 98, a third elastic member 98 is arranged between the second slider 97 and the lower part of the second slide rail 96; a first mounting plate 99, a first mounting plate 99 is welded and fixed on the front side of the second slider 97; a circular saw cutting machine 910, a circular saw cutting machine 910 is installed on the first mounting plate 99 by bolts.

[0030] like Figure 5 and Figure 8 As shown, it also includes a fixing component 13, which includes: an elongated slot plate 133, which is symmetrically welded and fixed to the top of the workbench plate 6; a connecting block 131, which is welded and fixed to one side of the lower part of the second connecting rod 91 close to the elongated slot plate 133; a bracket 132, which is welded and fixed to the connecting block 131, and the teeth of the bracket 132 cooperate with the teeth of the elongated slot plate 133.

[0031] The user carries the device to the construction site where cutting is required, then rotates the workbench 6 upward to a horizontal state, then rotates the two N-shaped brackets 2 to be flush with the N-shaped bracket 1, and the clamping shaft 72 of the N-shaped bracket 2 squeezes the workbench 6, and the clamping shaft 72 is squeezed to move downward, and the first elastic member 73 is compressed. When the insertion hole at the bottom of the workbench 6 is aligned with the clamping shaft 72, the clamping shaft 72 is inserted into the insertion hole. At this time, the workbench 6 is fixed, and the user removes the cutting assembly 9 from the U-shaped frame 8, and then slides the sliding block 92 of the cutting assembly 9 into the sliding groove on the workbench 6. Then the staff can place the stone to be cut on the support plate 10, adjust the position to be cut, and then hold the grip of the circular saw cutting machine 910. The circular saw cutter 910 can be moved up and down in the second slide rail 96 to adjust the cutting distance through the first mounting plate 99 and the second slider 97. By pushing the handle of the circular saw cutter 910 forward and backward, the circular saw cutter 910 can be driven to move forward and backward along the direction of the first slide rail 94 for cutting. Due to the sinking of all parts on the second connecting rod 91 under the gravity, the second elastic member 93 is compressed, and the bracket 132 is clamped into the clamping teeth of the long clamping slot plate 133, thereby preventing the sliding block 92 from moving left and right when the circular saw cutter 910 is cutting. When folding is required, the user presses the lever 76 downward, and the lever 76 drives the clamping shaft 72 to move downward and disengage from the socket through the first connecting rod 75, so that the N-shaped bracket 2 can be folded and collected. The device has a simple structure, can be quickly disassembled and assembled, and is suitable for use on construction sites.

[0032] like Figure 1 and Figure 6 As shown, it also includes a rotating component 11, which includes: an annular slide rail 111, which is clamped on the middle part of the top front side of the workbench 6; a connecting bracket 112, which is welded and fixed between the inner rings of the annular slide rail 111; a second mounting plate 113, which is welded and fixed to the bottom of the connecting bracket 112 symmetrically; a motor 114, which is bolted to the front and back of the tops of the two second mounting plates 113; a gear 115, which is keyed to the output shaft of the motor 114; an annular frame 116, which is slidably arranged in the annular slide rail 111; a gear ring 117, which is arranged on the inner ring of the annular frame 116, and the gear ring 117 is meshed with the four gears 115; a rotating disk 118, which is arranged on the top of the annular frame 116.

[0033] like Figure 1 , Figure 6 and Figure 7As shown, it also includes an adsorption component 12, which includes: a cylindrical cylinder body 121, a cylindrical cylinder body 121 is rotatably arranged in the middle of the connecting bracket 112; a moving rod 122, a moving rod 122 is symmetrically slidably arranged at the bottom of the cylindrical cylinder body 121; a piston 123, a piston 123 is slidably arranged in the cylindrical cylinder body 121, and the tops of the two moving rods 122 are fixedly connected to the bottoms of the pistons 123; a third connecting rod 124, a third connecting rod 124 is welded and fixed between the bottoms of the moving rods 122; an electric push rod 125, an electric push rod 125 is installed at the center of the bottom of the cylindrical cylinder body 121 by bolts, and the push rod of the electric push rod 125 is connected to the middle of the third connecting rod 124.

[0034] When the edge of the stone needs to be cut and polished, the support plate 10 can be removed first, and then the annular slide rail 111 is inserted into the middle of the workbench 6. The user places the stone on the rotating disk 118 and controls the electric push rod 125 to work. The electric push rod 125 extends to drive the third connecting rod 124 to move downward. The third connecting rod 124 drives the piston 123 to move downward through the moving rod 122. The pressure between the piston 123 and the stone becomes smaller, thereby fixing the stone. Then use the cutting assembly 9 to cut one side of the stone. After the cutting is completed, the cutting assembly 9 is away from the rotating assembly 11. At this time, the motor 114 is started to work, and the four motors 114 drive the gears 115 to rotate synchronously, and then the ring gear 117 drives the annular frame 116 and the rotating disk 118 to rotate, thereby rotating the stone to the side that needs to be cut, and then the motor 114 is stopped. When the next cutting action is performed and the fixing is not required after the cutting is completed, the electric push rod 125 drives the third connecting rod 124 to move upward, the piston 123 moves upward, the pressure is restored, and the stone can be removed. The device has a simple structure and can replace the rotating assembly 11 or the supporting plate 10 according to the required cutting method of the stone.

[0035] like Figure 1 and Fig. 9 As shown, it also includes a limiting mechanism 14, which includes: a second rotating shaft 141, and the second rotating shaft 141 is arranged at the front and rear lower parts of the left side wall at the top of the N-shaped frame 1; a fixed sleeve 142, and the fixed sleeve 142 is arranged on the second rotating shaft 141; an L-shaped frame 143, and a square groove is opened on the right side of the fixed sleeve 142, and the L-shaped frame 143 is slidably arranged in the square groove of the fixed sleeve 142; a fourth elastic member 144, and the fourth elastic member 144 is arranged between the L-shaped frame 143 and the square groove of the fixed sleeve 142.

[0036] When the device is folded, the L-shaped frame 143 is pulled and rotated, the fourth elastic member 144 is stretched, and then the L-shaped frame 143 drives the fixed sleeve 142 to rotate to the right side of the N-shaped bracket 2, and the L-shaped frame 143 is released. The fourth elastic member 144 drives the L-shaped frame 143 to reset, and then the fixed sleeve 142 and the L-shaped frame 143 restrict and fix the N-shaped frame 1 and the N-shaped bracket 2 for easy transportation.

[0037] like Figure 4 As shown, it also includes a fixing frame 15 , on which the protective cover of the circular saw cutting machine 910 is provided; and a liquid spraying machine 16 , on which the liquid spraying machine 16 is clamped.

[0038] The externally connected pipeline sprays the cutting fluid through the liquid sprayer 16 to spray the cut stone part.

[0039] The technical principles of the embodiments of the present invention are described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the embodiments of the present invention and cannot be interpreted in any way as limiting the protection scope of the embodiments of the present invention. Based on the explanations herein, those skilled in the art can think of other specific implementation methods of the embodiments of the present invention without creative work, and these methods will fall within the protection scope of the embodiments of the present invention.

Claims

1. A portable building stone cutting machine, characterized in that: The invention comprises an N-shaped frame (1) and an N-shaped bracket (2), wherein the N-shaped bracket (2) is symmetrically arranged on the front and rear sides of the right side of the N-shaped frame (1) in a rotatable manner; a bearing seat (3), wherein the bearing seat (3) is symmetrically arranged on the middle part of the upper side of the right side of the N-shaped frame (1); a first rotating shaft (5), wherein the first rotating shaft (5) is arranged between the two bearing seats (3); a mounting sleeve (4), wherein the first rotating shaft (5) is arranged on the first rotating shaft (5); a workbench (6), wherein the mounting sleeve (4) is connected to the workbench (6), and the bottom of the workbench (6) is spaced apart with plug holes on both the front and rear sides; a clamping assembly (7), wherein the upper part of the N-shaped bracket (2) is provided with a clamping assembly (7) that cooperates with the plug hole of the N-shaped frame (1); and a U-shaped frame (8). A U-shaped frame (8) is provided in the middle of the left side wall of the N-shaped frame (1); a cutting assembly (9), on which a cutting assembly (9) for stone cutting is provided; a support plate (10), on which a support plate (10) for placing stones is inserted and provided on the top of the workbench (6); a clamping assembly (7) comprising: a clamping shaft (72), on which a columnar groove (71) is provided at intervals on the top of the N-shaped frame (2), and in which a clamping shaft (72) is slidably provided in the columnar groove (71); a first elastic member (73), on which a first elastic member (73) is provided between the clamping shaft (72) and the columnar groove (71); and a first connecting rod (75), on which a columnar groove (71) is uniformly provided on the side wall of the N-shaped frame (2). A slot (74) is provided in the slot (74) in a sliding manner with a first connecting rod (75), the first connecting rod (75) being connected to the clamping shaft (72); a lever (76), the lever (76) being connected between the first connecting rods (75); a cutting assembly (9) comprising: a second connecting rod (91), a sliding block (92), a sliding groove symmetrically provided on the top of the workbench (6) in front and back, a square groove provided on the bottom of the second connecting rod (91), a sliding block (92) being slidably provided in the square groove, the sliding block (92) being matched with the sliding groove; a second elastic member (93), the second elastic member (93) being provided in the square groove; a first slide rail (94), the space between the upper portions of the two second connecting rods (91) A first slide rail (94) is provided; a first slider (95), the first slider (95) being slidably provided inside the first slide rail (94); a second slide rail (96), the second slide rail (96) being vertically provided on the front side of the top of the first slider (95); a second slider (97), the second slider (97) being slidably provided inside the second slide rail (96); a third elastic member (98), the third elastic member (98) being provided between the second slider (97) and the lower part of the second slide rail (96); a first mounting plate (99), the first mounting plate (99) being provided on the front side of the second slider (97); and a circular saw cutting machine (910), the circular saw cutting machine (910) being provided on the first mounting plate (99).

2. A portable building stone cutting machine as claimed in claim 1, characterized in that: The rotating assembly (11) also includes an annular slide rail (111), the annular slide rail (111) being clamped at the middle of the top front side of the workbench (6); a connecting bracket (112), the connecting bracket (112) being arranged between the inner rings of the annular slide rail (111); a second mounting plate (113), the second mounting plate (113) being symmetrically arranged at the bottom of the connecting bracket (112); a motor (114), the motor (114) being arranged at the front and rear of the tops of the two second mounting plates (113); a gear (115), the output shaft of the motor (114) being arranged with a gear (115); an annular frame (116), the annular frame (116) being slidably arranged inside the annular slide rail (111); a gear ring (117), the inner ring of the annular frame (116) being arranged with a gear ring (117), the gear ring (117) being meshed with the four gears (115); and a rotating disk (118), the rotating disk (118) being arranged at the top of the annular frame (116).

3. A portable building stone cutting machine as claimed in claim 2, characterized in that: The device also includes an adsorption assembly (12), which includes: a cylindrical cylinder body (121), the cylindrical cylinder body (121) being rotatably arranged in the middle of the connecting bracket (112); a moving rod (122), the moving rod (122) being symmetrically slidably arranged at the bottom of the cylindrical cylinder body (121); a piston (123), the piston (123) being slidably arranged in the cylindrical cylinder body (121), the tops of the two moving rods (122) being connected to the bottoms of the pistons (123); a third connecting rod (124), the third connecting rod (124) being arranged between the bottoms of the moving rods (122); and an electric push rod (125), the electric push rod (125) being arranged at the center of the bottom of the cylindrical cylinder body (121), the push rod of the electric push rod (125) being connected to the middle of the third connecting rod (124).

4. A portable building stone cutting machine as claimed in claim 3, characterized in that: The fixing assembly (13) further comprises: an elongated card slot plate (133), the elongated card slot plate (133) being symmetrically arranged on the top of the workbench plate (6) in the front and rear directions; a connecting block (131), a connecting block (131) being arranged on one side of the lower part of the second connecting rod (91) close to the elongated card slot plate (133); and a card frame (132), the connecting block (131) being provided with a card frame (132), the card teeth of the card frame (132) being matched with the card teeth of the elongated card slot plate (133).

5. A portable building stone cutting machine as claimed in claim 4, characterized in that: The device further comprises a limiting mechanism (14), the limiting mechanism (14) comprising: a second rotating shaft (141), the second rotating shaft (141) being arranged at the front and rear lower parts of the left side wall at the top of the N-shaped frame (1); a fixed sleeve frame (142), the fixed sleeve frame (142) being arranged on the second rotating shaft (141); an L-shaped frame (143), the fixed sleeve frame (142) having a square groove on the right side thereof, the L-shaped frame (143) being slidably arranged in the square groove of the fixed sleeve frame (142); and a fourth elastic member (144), the fourth elastic member (144) being arranged between the L-shaped frame (143) and the square groove of the fixed sleeve frame (142).

6. A portable building stone cutting machine as claimed in claim 5, characterized in that: It also includes a fixing frame (15), the fixing frame (15) being arranged on the protective cover of the circular saw cutting machine (910); and a liquid spraying machine (16), the liquid spraying machine (16) being clamped on the fixing frame (15).

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