Crushing mechanism of an excavator

Abstract

The present invention discloses an excavator crushing mechanism, and relates to the technical field of building crushing. The present invention comprises a mounting frame, a hydraulic column is fixedly mounted on the inner side of the mounting frame, a crushing rod is connected to the inner limit sliding connection of the bottom of the hydraulic column, hydraulic rods are fixedly mounted on the left and right sides of the mounting frame, sweeping blocks are fixedly mounted on the bottom ends of the hydraulic rods, a circular hole is opened in the middle of the sweeping block, the crushing rod passes downward through the circular hole in the middle of the sweeping block, and a cooling assembly is arranged on the outer side of the crushing rod inside the sweeping block. The present invention can conveniently sweep away and remove the construction waste generated by crushing, avoid the interference of the construction waste on the crushing, improve the efficiency of crushing, and is conducive to the upward movement and extraction of the crushing rod, and can evenly cool the crushing rod, so that the crushing rod maintains its hardness, ensures the crushing efficiency, and slows down the wear of the crushing rod, thereby improving the service life of the crushing rod.

Description

Technical Field

[0001] The invention relates to the technical field of building crushing, and in particular to a crushing mechanism of an excavator. Background Art

[0002] When demolishing a building, when faced with reinforced concrete structures, due to their high hardness and the risk of collapse, they can only be crushed from a distance. Therefore, the demolition work is carried out using excavators carrying crushing mechanisms, and the hydraulic breakers in the crushing mechanisms are used to crush the reinforced concrete, thereby facilitating the demolition of the building.

[0003] However, the existing excavator crushing mechanism still has the following defects during use:

[0004] 1. The existing excavator crushing mechanism will produce crushed construction waste during crushing. When the existing crushing mechanism is in use, only the crushing rod in the hydraulic breaker is in contact with the building structure, which makes it difficult to clean the construction waste generated by crushing, thereby hindering the contact between the crushing rod and the building structure, reducing the crushing efficiency. At the same time, since there are steel bars in the concrete structure, the crushing rod is easily stuck between the steel bars and difficult to pull out during crushing, and relying on the excavator to directly pull it out is also prone to shaking, reducing safety.

[0005] 2. When the existing excavator crushing mechanism is crushing, the crushing rod constantly collides with concrete and steel bars, which will cause the temperature of the crushing rod to rise, reduce the hardness of the crushing rod, and reduce the crushing efficiency. At the same time, it will also accelerate the wear of the crushing rod and reduce the service life of the crushing rod. The existing spray cooling device sprays water unevenly and the cooling effect needs to be improved. Summary of the invention

[0006] The purpose of the present invention is to solve the above-mentioned problems that it is difficult to clean up the construction waste generated by crushing, which will hinder the contact between the crushing rod and the building structure, reduce the crushing efficiency, and the crushing rod is easily stuck between the steel bars and difficult to pull out, and the crushing rod is not effectively cooled, which makes the hardness of the crushing rod decrease, reduces the crushing efficiency, and also accelerates the wear of the crushing rod, reducing the service life of the crushing rod. The present invention provides an excavator crushing mechanism.

[0007] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0008] A crushing mechanism of an excavator comprises a mounting frame, a hydraulic column is fixedly mounted on the inner side of the mounting frame, a crushing rod is connected to the inner limit sliding connection of the bottom of the hydraulic column, hydraulic rods are fixedly mounted on the left and right sides of the mounting frame, sweep blocks are fixedly mounted on the bottom ends of the hydraulic rods, a circular hole is opened in the middle of the sweep block, the crushing rod passes downward through the circular hole in the middle of the sweep block, a cooling assembly is arranged on the outer side of the crushing rod inside the sweep block, and the cooling assembly is used to cool the crushing rod during the crushing process.

[0009] Furthermore, a connector is fixedly mounted on the top end of the hydraulic rod, and the connector is used to connect to a hydraulic oil pipeline on an excavator, thereby controlling the extension and retraction of the hydraulic rod.

[0010] Furthermore, the cooling assembly includes a mounting seat, a mounting seat is fixedly installed on the outer side of the breaking rod inside the sweep block, two of the mounting seats form a group, and there are four groups in total, and the four groups of mounting seats are evenly distributed inside the sweep block, and a roller is limitedly rotatably connected between the two mounting seats in a single group, and adjacent parts of the two ends of the four rollers are connected to a worm gear through a coupling transmission, and the coupling adopts a cross-axis universal coupling, so that the roller can drive the worm gear to rotate through the coupling, and a rotating drum is limitedly rotatably connected below the roller and the worm gear inside the sweep block, and a connecting seat is evenly fixedly installed on the top of the rotating drum, and a gear ring is fixedly installed on the outer side of the top of the connecting seat, and a limited sliding groove is provided on the outer side of the connecting seat inside the sweep block, and the limited sliding groove is used for the limited sliding connection of the connecting seat inside the sweep block, so that the connecting seat can only reciprocate to a certain extent, and a spraying assembly is arranged between the bottom of the rotating drum and the inner wall of the sweeping block, and the spraying assembly is used to spray water toward the outer wall of the breaking rod for cooling.

[0011] Furthermore, an arc groove is provided on the periphery of the middle part of the rotating roller, and the arc groove is pressed and adhered to the outer wall of the crushing rod, so that when the crushing rod moves up and down, it can drive the rotating roller to rotate.

[0012] Furthermore, there are four connecting seats, and all of them extend upward to the inner side of the worm. The toothed ring on the outer side of the top of the connecting seat is meshed with the worm. Therefore, when the worm rotates, the toothed ring and the connecting seat can be driven to rotate.

[0013] Furthermore, the spray assembly includes a cylinder, the upper end of the bottom of the rotating cylinder is connected to the cylinder in a limited rolling manner, the center of the inner top of the cylinder is slidably connected to a push-pull rod, the top of the push-pull rod is connected to the upper inner wall of the sweeping block in a limited rolling manner, so that the cylinder and the push-pull rod can rotate and swing, and a piston is fixedly installed on the bottom end of the push-pull rod, and the piston is slidably connected to the inside of the cylinder, and a spray head is fixedly installed on the side of the bottom of the cylinder close to the outer wall of the rotating cylinder, and the spray head is connected to the inside of the cylinder, and a connecting pipe is fixedly connected between the side of the bottom of the cylinder opposite to the spray head and the inner wall of the sweeping block, the connecting pipe is connected to the inside of the cylinder, and the connecting pipe adopts a bending design so that the connecting pipe can bend and swing, and a one-way valve is installed at the connection between the cylinder and the spray head, and at the connection between the cylinder and the connecting pipe.

[0014] Further, the spray head passes through the drum so as to spray water onto the outer wall surface of the breaker bar.

[0015] Furthermore, water storage chambers are provided on the left and right sides of the sweeping block, a water filling cover for sealing the water filling port is provided above the water storage chamber on the top of the sweeping block, an annular cavity is provided on the outer side of the bottom of the rotating cylinder inside the sweeping block, the annular cavity is connected with the bottoms of the water storage chambers on the left and right sides, and through holes are provided between the annular cavity inside the sweeping block and each connecting pipe, the through holes are used for connecting the annular cavity with the connecting pipe, so that the water inside the water storage chamber can enter the interior of the cylinder through the annular cavity, the through holes and the connecting pipe.

[0016] Furthermore, the one-way valve allows the flow direction from the annular cavity to the nozzle, so that when the push-pull rod drives the piston to move up and down inside the cylinder, water can be drawn into the cylinder and then sprayed inward through the nozzle.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The present invention, through the design of the sweeping block outside the breaker rod, utilizes the hydraulic rod to drive the sweeping block to move up and down. After the sweeping block is moved downward, the construction waste can be swept away and removed by driving the sweeping block to move and swing, thereby avoiding the interference of the construction waste on the crushing and improving the crushing efficiency. Moreover, by utilizing the downward movement of the sweeping block, when the breaker rod is stuck by the steel bar, it can also be facilitated to move the breaker rod upward and pull it out, thereby avoiding the shaking caused by direct pulling out and ensuring safety.

[0019] 2. The present invention, through the design of the cooling assembly in the sweeping block, can drive the rotating drum to rotate back and forth during the up and down movement of the crushing rod, and drive the spraying assembly to spray cooling water, thereby realizing the spraying of cooling water while reciprocatingly swinging, thereby ensuring the uniformity of cooling of the crushing rod, so that the crushing rod maintains its hardness, ensures the crushing efficiency, and at the same time reduces the wear of the crushing rod and increases the service life of the crushing rod. When the crushing stops, the cooling water will no longer be sprayed, thereby avoiding the waste of cooling water. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a three-dimensional structural assembly diagram of the present invention;

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the crushing rod and the sweeping block of the present invention;

[0023] Figure 4 It is a schematic diagram of a partially cutaway three-dimensional structure of a breaker rod and a sweep block of the present invention;

[0024] Figure 5 The present invention is a schematic diagram of the three-dimensional structure of the sweep block Figure 1 ;

[0025] Figure 6 The present invention Figure 5 A magnified view of the structure at center;

[0026] Figure 7 The present invention is a schematic diagram of the three-dimensional structure of the sweep block Figure 2 ;

[0027] Figure 8 The present invention is a schematic diagram of the three-dimensional structure of the sweep block Figure 3 ;

[0028] Fig. 9 It is a schematic diagram of the three-dimensional structure of the cooling assembly of the present invention;

[0029] Fig.10 It is a schematic diagram of a partial cross-sectional three-dimensional structure of a spray assembly of the present invention.

[0030] Figure numerals: 1. mounting frame; 2. hydraulic column; 3. breaking rod; 4. hydraulic rod; 41. connecting head; 5. sweeping block; 6. cooling assembly; 61. mounting seat; 62. roller; 63. coupling; 64. worm; 65. rotating drum; 66. connecting seat; 67. gear ring; 68. limiting slide groove; 69. spray assembly; 691. cylinder; 692. push-pull rod; 693. piston; 694. nozzle; 695. connecting pipe; 696. one-way valve; 7. water storage chamber; 8. water filling cover; 9. annular chamber; 10. through hole. DETAILED DESCRIPTION

[0031] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0032] A crushing mechanism for an excavator according to a preferred embodiment of the present invention will be described in detail below. Figure 1-Figure 3 As shown, an excavator crushing mechanism includes a mounting frame 1, a hydraulic column 2 is fixedly installed on the inner side of the mounting frame 1, a crushing rod 3 is connected to the internal limiting sliding at the bottom of the hydraulic column 2, hydraulic rods 4 are fixedly installed on the left and right sides of the mounting frame 1, sweep blocks 5 are fixedly installed on the bottom ends of the hydraulic rods 4, a circular hole is opened in the middle of the sweep block 5, the crushing rod 3 passes downward through the circular hole in the middle of the sweep block 5, a cooling assembly 6 is arranged on the outer side of the crushing rod 3 inside the sweep block 5, and the cooling assembly 6 is used to cool the crushing rod 3 during the crushing process.

[0033] A connector 41 is fixedly mounted on the top of the hydraulic rod 4 , and the connector 41 is used to connect to a hydraulic oil pipeline on an excavator, thereby controlling the extension and retraction of the hydraulic rod 4 .

[0034] When crushing and demolition is required, the mounting frame 1 is first installed on the excavator, and the hydraulic pipeline on the excavator is connected with the hydraulic column 2 and the hydraulic rod 4. Then, the mounting frame 1 and the hydraulic column 2 are driven by the excavator to move, so that the crushing rod 3 at the bottom of the hydraulic column 2 contacts the concrete, and then squeezed downward to cooperate with the action of the hydraulic column 2 to achieve concrete crushing.

[0035] During the crushing process, the crushing rod 3 can be cooled by the cooling assembly 6 , so that the crushing rod 3 maintains its hardness, ensures the crushing efficiency, and reduces the wear of the crushing rod 3 .

[0036] During the crushing process, when the area to be crushed is blocked by the generated construction waste, the sweeping block 5 can be driven downward by the action of the hydraulic rod 4, so that the sweeping block 5 moves down to the bottom and is flush with the bottom of the crushing rod 3, and then the excavator drives the mounting frame 1 to move and swing, which can drive the sweeping block 5 to sweep away and remove the construction waste, thereby avoiding the influence of construction waste on normal crushing and improving the crushing efficiency. After the removal is completed, the sweeping block 5 is driven by the hydraulic rod 4 to move back to the initial position, so that the crushing rod 3 can perform normal crushing work.

[0037] When the crushing rod 3 is stuck by the steel bars in the concrete, the sweep block 5 can be driven downward to help the crushing rod 3 to break away upward, thereby ensuring the normal subsequent crushing and the stability of the excavator.

[0038] Furthermore, if Figure 4-Figure 7, Fig. 9 As shown, the cooling assembly 6 includes a mounting seat 61, and the mounting seat 61 is fixedly installed on the outer side of the breaking rod 3 inside the sweeping block 5. Two mounting seats 61 form a group, and there are four groups in total. The four groups of mounting seats 61 are evenly distributed inside the sweeping block 5, and a roller 62 is connected between the two mounting seats 61 in a single group for limited rotation. An arc groove is opened on the outer periphery of the middle part of the roller 62, and the arc groove is pressed and attached to the outer wall of the breaking rod 3. Therefore, when the breaking rod 3 moves up and down, it can drive the roller 62 to rotate.

[0039] The adjacent parts of both ends of the four rollers 62 are connected to the worm 64 through the coupling 63 . The coupling 63 is a cross-axis universal coupling, so that the roller 62 can drive the worm 64 to rotate through the coupling 63 .

[0040] The lower part of the rotating roller 62 and the worm 64 inside the sweeping block 5 is connected to a rotating drum 65 for limited rotation. A connecting seat 66 is evenly and fixedly installed on the top of the rotating drum 65. A gear ring 67 is fixedly installed on the outer side of the top of the connecting seat 66. There are four connecting seats 66, and they all extend upward to the inner side of the worm 64. The gear ring 67 on the outer side of the top of the connecting seat 66 is meshed with the worm 64. Therefore, when the worm 64 rotates, it can drive the gear ring 67 and the connecting seat 66 to rotate. A limited sliding groove 68 is provided on the outer side of the connecting seat 66 inside the sweeping block 5. The limiting sliding groove 68 is used for the limited sliding connection of the connecting seat 66 inside the sweeping block 5, so that the connecting seat 66 can only reciprocate within a certain range.

[0041] The principle of cooling the breaker bar 3 by using the cooling assembly 6 is as follows:

[0042] During the crushing process, after the crushing rod 3 contacts the concrete and presses down, the crushing rod 3 can retract upward for a while. After a single crushing is completed, after the mounting frame 1 is lifted, the crushing rod 3 will move down again. During the crushing process, as the crushing rod 3 repeatedly chisels downward, it will also move up and down repeatedly.

[0043] In the process of the crushing rod 3 moving up and down, the roller 62 is attached to the outer wall of the crushing rod 3, so as to drive the roller 62 to rotate back and forth, and the coupling 63 between the roller 62 and the worm 64 can also drive the worm 64 to rotate back and forth. In the process of the reciprocating rotation of the worm 64, the worm 64 is meshed with the toothed ring 67 at the top of the connecting seat 66 to drive the connecting seat 66 and the drum 65 to rotate back and forth. In the process of the reciprocating rotation of the drum 65, the spraying assembly 69 can be driven to spray cooling water to the outer wall of the crushing rod 3 while rotating back and forth, so as to evenly cool the crushing rod 3. When the crushing is stopped, the spraying of cooling water will also be stopped to avoid the waste of cooling water.

[0044] Due to the limiting effect of the limiting groove 68 on the connecting seat 66, during the long-distance upward or downward movement of the breaker rod 3, when the connecting seat 66 rotates to be attached to the inner wall of one side of the limiting groove 68, the connecting seat 66 and the rotating drum 65 can no longer rotate, and the breaker rod 3 can also overcome the friction between the roller 62 and move, and no longer drive the connecting seat 66 and the rotating drum 65 to rotate until the next reverse movement, driving the connecting seat 66 and the rotating drum 65 to rotate in the opposite direction, thereby better realizing the reciprocating rotation of the connecting seat 66 and the rotating drum 65.

[0045] Furthermore, if Figure 5-Figure 6 , Figure 8-Figure 10 As shown, a spray assembly 69 is provided between the bottom of the drum 65 and the inner wall of the sweep block 5 , and the spray assembly 69 is used to spray water toward the outer wall of the breaker bar 3 for cooling.

[0046] The spray assembly 69 includes a cylinder 691, the upper end of the bottom of the rotating cylinder 65 is limited and rollingly connected to the cylinder 691, and the push-pull rod 692 is slidably connected to the center of the top of the cylinder 691. The top of the push-pull rod 692 is limited and rollingly connected to the upper inner wall of the sweeping block 5, so that the cylinder 691 and the push-pull rod 692 can rotate and swing, and the bottom end of the push-pull rod 692 is fixedly installed with a piston 693, and the piston 693 is slidably connected to the inside of the cylinder 691. A nozzle 694 is fixedly installed on one side of the bottom of the cylinder 691 close to the outer wall of the rotating cylinder 65. The nozzle 694 is connected to the inside of the cylinder 691, and the nozzle 694 passes through the rotating cylinder 65, so that water can be sprayed onto the outer wall surface of the breaking rod 3.

[0047] A connecting pipe 695 is fixedly connected between the side of the bottom of the cylinder 691 opposite to the nozzle 694 and the inner wall of the sweep block 5. The connecting pipe 695 is connected to the inside of the cylinder 691 and adopts a bending design so that the connecting pipe 695 can bend and swing.

[0048] Water storage chambers 7 are provided on the left and right sides of the interior of the sweeping block 5, and a water filling cover 8 for sealing the water filling port is provided above the water storage chamber 7 at the top of the sweeping block 5. An annular chamber 9 is provided on the outer side of the bottom of the rotating cylinder 65 inside the sweeping block 5, and the annular chamber 9 is connected with the bottoms of the water storage chambers 7 on the left and right sides. Through holes 10 are provided between the annular chamber 9 inside the sweeping block 5 and each connecting pipe 695, and the through holes 10 are used for connecting the annular chamber 9 with the connecting pipe 695, so that the water inside the water storage chamber 7 can enter the interior of the cylinder 691 through the annular chamber 9, the through holes 10 and the connecting pipe 695.

[0049] A one-way valve 696 is installed at the connection between the cylinder 691 and the nozzle 694, as well as the connection between the cylinder 691 and the connecting pipe 695. The allowed flow direction of the one-way valve 696 is the flow direction from the annular cavity 9 toward the nozzle 694, so that when the push-pull rod 692 drives the piston 693 to move up and down inside the cylinder 691, water can be drawn into the cylinder 691 and then sprayed inward through the nozzle 694.

[0050] During the reciprocating rotation of the drum 65, the spray assembly 69 can be driven to spray cooling water to the outer wall of the crushing rod 3 while reciprocating. At the same time, when the crushing is stopped, the cooling water spraying will also be stopped. The principle is as follows:

[0051] When the drum 65 reciprocates, the sliding connection between the cylinder 691 and the push-pull rod 692, the limited rolling connection between the bottom of the cylinder 691 and the upper end of the bottom of the drum 65, and the limited rolling connection between the top of the push-pull rod 692 and the upper inner wall of the sweep block 5 can drive the cylinder 691 and the push-pull rod 692 to rotate and swing. During the swinging process, the piston 693 at the bottom of the push-pull rod 692 can move up and down inside the cylinder 691. When moving upward, through the design of the one-way valve 696, the cooling water entering the annular cavity 9 from the water storage cavity 7 can be drawn into the interior of the cylinder 691 through the through hole 10 and the connecting pipe 695. When moving downward, the cooling water entering the interior of the cylinder 691 can be sprayed inwardly from the nozzle 694, and then sprayed onto the outer wall of the breaking rod 3. The spraying is performed while rotating and swinging, thereby improving the uniformity of the spray cooling of the breaking rod 3.

[0052] After the crushing stops, the drum 65 stops rotating, so that the position of the piston 693 in the cylinder 691 remains unchanged, the cooling water is no longer extracted and pushed, and the nozzle 694 stops spraying, thereby avoiding the waste of cooling water.

[0053] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An excavator crushing mechanism, comprising a mounting frame (1), characterized in that: A hydraulic column (2) is fixedly mounted on the inner side of the mounting frame (1), a crushing rod (3) is slidably connected to the inner limit position of the bottom of the hydraulic column (2), hydraulic rods (4) are fixedly mounted on the left and right sides of the mounting frame (1), and sweeping blocks (5) are fixedly mounted on the bottom ends of the hydraulic rods (4), a circular hole is provided in the middle of the sweeping block (5), the crushing rod (3) passes downward through the circular hole in the middle of the sweeping block (5), the sweeping block (5) is used to sweep away and remove construction waste, and a cooling component (6) is provided on the outer side of the crushing rod (3) inside the sweeping block (5), and the cooling component (6) is used to cool the crushing rod (3) during the crushing process; Wherein, the cooling component (6) comprises: A mounting seat (61), wherein the outer side of the crushing rod (3) inside the sweep block (5) is fixedly mounted with the mounting seat (61), two of the mounting seats (61) form a group, and there are four groups in total, and the four groups of mounting seats (61) are evenly distributed inside the sweep block (5); A rotating roller (62), wherein each of the two mounting seats (61) is connected to a rotating roller (62) in a limited rotational manner, and a circular arc groove is formed on the periphery of the middle portion of the rotating roller (62), and the circular arc groove is pressed and adhered to the outer wall of the crushing rod (3); A coupling (63) and a worm (64), wherein adjacent portions of both ends of the four rollers (62) are connected to the worm (64) through the coupling (63); A rotating drum (65), the lower part of the internal rotating roller (62) and the worm (64) of the sweeping block (5) being rotationally connected to the rotating drum (65); A connecting seat (66), the top end of the rotating drum (65) being evenly and fixedly mounted with the connecting seat (66); A gear ring (67), the gear ring (67) being fixedly mounted on the outer side of the top of the connecting seat (66); A limiting slide groove (68), wherein the outer side of the connecting seat (66) inside the sweeping block (5) is provided with a limiting slide groove (68), and the limiting slide groove (68) is used for limiting sliding connection of the connecting seat (66) inside the sweeping block (5); A spraying assembly (69) is provided between the bottom of the rotating drum (65) and the inner wall of the sweeping block (5), and the spraying assembly (69) is used to spray water toward the outer wall of the crushing rod (3) for cooling.

2. The excavator crushing mechanism according to claim 1, characterized in that: A connecting head (41) is fixedly mounted on the top end of the hydraulic rod (4), and the connecting head (41) is used for connecting to a hydraulic oil pipeline on an excavator.

3. The excavator crushing mechanism according to claim 1, characterized in that: The coupling (63) is a cross-axis universal coupling.

4. The excavator crushing mechanism according to claim 1, characterized in that: There are four connecting seats (66) and all of them extend upward to the inner side of the worm (64); the toothed ring (67) on the outer side of the top of the connecting seat (66) and the worm (64) are meshed with each other.

5. The excavator crushing mechanism according to claim 1, characterized in that: The spray assembly (69) comprises: A cylinder (691), the upper end of the bottom of the rotating cylinder (65) being limitedly and rollingly connected to the cylinder (691); A push-pull rod (692), wherein the push-pull rod (692) is slidably connected to the center of the top of the cylinder (691), and the top of the push-pull rod (692) is limitedly and rollingly connected to the upper inner wall of the sweeping block (5); A piston (693), the bottom end of the push-pull rod (692) is fixedly mounted with the piston (693), and the piston (693) is slidably connected to the inside of the cylinder (691); A spray head (694), the spray head (694) being fixedly mounted on one side of the bottom of the cylinder (691) close to the outer wall of the rotating cylinder (65), and the spray head (694) being in communication with the interior of the cylinder (691); A connecting pipe (695), wherein a connecting pipe (695) is fixedly connected between the side of the bottom of the cylinder (691) opposite to the nozzle (694) and the inner wall of the sweeping block (5), the connecting pipe (695) is in communication with the interior of the cylinder (691), and the connecting pipe (695) adopts a bent design; A one-way valve (696) is installed at the connection between the cylinder (691) and the nozzle (694), and at the connection between the cylinder (691) and the connecting pipe (695).

6. The excavator crushing mechanism according to claim 5, characterized in that: The spray head (694) passes through the rotating drum (65) so as to spray water onto the outer wall surface of the breaker bar (3).

7. The excavator crushing mechanism according to claim 5, characterized in that: Water storage chambers (7) are provided on the left and right sides of the sweep block (5); a water filling cover (8) for sealing the water filling port is provided above the water storage chamber (7) at the top of the sweep block (5); an annular chamber (9) is provided on the outside of the bottom of the rotating drum (65) inside the sweep block (5); the annular chamber (9) is connected to the bottoms of the water storage chambers (7) on the left and right sides; a through hole (10) is provided between the annular chamber (9) inside the sweep block (5) and each connecting pipe (695); the through hole (10) is used for connecting the annular chamber (9) with the connecting pipe (695).

8. The excavator crushing mechanism according to claim 7, characterized in that: The permissible flow direction of the one-way valve (696) is the flow direction from the annular cavity (9) toward the nozzle (694).

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