A cutter head connection mechanism for a dredging cutter suction dredger

Abstract

This invention provides a cutter head connection mechanism for a dredging cutter suction dredger, relating to the technical field of dredging cutter suction dredgers. It includes a threaded base and a stud. A stationary seat is sleeved on the outside of the base. A collar is fixedly disposed on the outside of the stationary seat. A top ring is sleeved on the outside of the stud within the collar. A moving ring is fixedly connected to the end of the top ring away from the collar. A push ring is disposed on the end of the moving ring away from the top ring. A spring is disposed at the end of the push ring. A spring seat is sleeved between the spring and the collar. The collar is located outside the stationary seat and the spring seat. A pressure-sensitive plate is sleeved on the end of the collar near the spring seat. The collar is filled with lubricating oil. This invention improves the sealing structure between the cutter head base and the stud. The arrangement of the spring, push ring, moving ring, and top ring facilitates the mechanical seal between the stationary seat and the moving ring, increases the sealing performance between the connection mechanism and the cutter head stud, and increases the service life of the connection mechanism.

Description

Technical Field

[0001] This invention relates to the field of dredging cutter suction dredger technology, and more specifically to a cutter head connection mechanism for a dredging cutter suction dredger. Background Technology

[0002] A cutter suction dredger uses a rotating cutter head to loosen the soil on the riverbed or seabed, mix it with cement to form slurry, and then suck it into the pump body through the suction pipe and send it to the discharge area through the discharge pipe. During the construction of a cutter suction dredger, the cutter head is first used to loosen the soil on the riverbed.

[0003] When the reamer is in use, it is connected to a hydraulic motor. The reamer is mounted on the stud by using a stud between the hydraulic motor and the reamer. A search reveals Chinese patent CN113668634A, which discloses a reamer head connection mechanism for a dredging cutter suction dredger, relating to the field of excavation equipment technology. This mechanism includes a stud and a base for connecting and fixing the reamer blades. The base has a threaded hole for threaded connection to the stud. A force-sharing mechanism is provided within the threaded hole. This force-sharing mechanism includes: a force-transmitting component, which includes a compressed state located within the base and an extended state connecting the base and the stud; and a triggering component connected to the bottom of the threaded hole. The triggering component receives pressure from the stud, causing the force-transmitting component to move from the compressed state to the extended state. This invention uses a force-sharing mechanism to distribute and transfer the compressive force between the threaded hole and the stud, which helps to avoid excessive helical compression on the stud and the threaded hole on the reamer head, leading to deformation and making disassembly impossible.

[0004] The above-mentioned cutter head connection structure still has the following shortcomings: the connection between the connection mechanism and the base is poorly sealed, and mud and water can easily enter the screw hole, causing corrosion of the cutter head connection mechanism, thus affecting the use effect of the cutter head connection. Therefore, a cutter head connection mechanism for a dredging cutter suction dredger is proposed to solve the above problems. Summary of the Invention

[0005] The present invention provides a cutter head connection mechanism for a dredging cutter suction dredger, which solves the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0007] An embodiment of the present invention provides a cutter head connection mechanism for a dredging cutter suction dredger, including a threaded base and a stud. A stationary seat is sleeved on the outside of the base, and a collar is fixedly disposed on the outside of the stationary seat. A top ring is sleeved on the outside of the stud in the inner cavity of the collar. A moving ring is fixedly connected to the end of the top ring away from the collar. A push ring is disposed on the end of the moving ring away from the top ring. A spring is disposed at the end of the push ring. A spring seat is sleeved between the spring and the collar. A bushing is disposed between the spring seat and the stud.

[0008] Furthermore, a stationary groove is provided at one end of the stationary seat near the base, and a third rubber pad is engaged in the stationary groove. A third bolt connected to the base is provided through the middle of the third rubber pad.

[0009] Furthermore, the collar is located outside the stationary seat and the spring seat, and a pressure-sensitive sheet is fitted on one end of the collar near the spring seat. The collar is filled with lubricating oil.

[0010] Furthermore, both the push ring and the spring are located inside the spring seat, and the top ring is in contact with the end surface of the stationary seat.

[0011] Furthermore, a spring groove is provided at one end of the spring seat near the bushing, and a first rubber pad is engaged in the spring groove. A first bolt connected to the bushing is provided through the middle of the first rubber pad.

[0012] Furthermore, a shaft groove is provided at the end of the bushing away from the spring seat, and a second rubber pad is engaged in the shaft groove. A second bolt is provided through the middle of the second rubber pad and is connected to the stud. Both ends of the bushing are provided with edge portions.

[0013] Furthermore, a sealing ring that fits against the stud is embedded on the inner side of the bushing.

[0014] The above-described solution of the present invention has at least the following beneficial effects:

[0015] 1. This invention, through the arrangement of a stationary seat, top ring, moving ring, push ring, spring, and spring seat, facilitates increased sealing between the base and the stud. The elastic compression of the spring on the push ring, moving ring, and top ring allows the top ring to fit tightly against the outer surface of the stationary seat. When the base drives the stud to rotate, the lubricant filled in the collar seals the connection between the collar and the spring seat. When an angular offset occurs between the base and the stud, the moving ring drives the top ring and the stationary seat to rotate. A liquid sealing film is generated between the rotating top ring and the surface of the stationary seat, achieving sealing between the stationary seat and the top ring and improving the sealing effect between the base and the stud. By setting a bushing between the spring seat and the stud, the spring seat is easily limited and engaged, while the installation convenience between the spring seat and the collar is increased. Furthermore, the use of the sealing ring improves the sealing performance between the stud and the bushing, alleviates the problem of mud and water seepage in the connection mechanism, and increases the service life of the reamer head connection mechanism. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention;

[0017] Figure 2 This is a partial structural cross-sectional view of the present invention;

[0018] Figure 3 This is a partial exploded view of the structure of the present invention;

[0019] Figure 4 This is a perspective view of the base and the stationary seat in this invention;

[0020] Figure 5 This is a partial structural cross-sectional view of the stud, bushing, and spring seat in this invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Base; 2. Stud; 3. Stationary seat; 4. Collar; 5. Top ring; 6. Moving ring; 7. Push ring; 8. Spring; 9. Spring seat; 10. Spring groove; 11. First rubber pad; 12. First pin body; 13. Bushing; 14. Shaft groove; 15. Second rubber pad; 16. Second pin body; 17. Third rubber pad; 18. Third pin body; 19. Pressure-sensitive sheet; 20. Sealing ring. Detailed Implementation

[0023] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0024] like Figures 1 to 5 As shown, an embodiment of the present invention provides a cutter head connection mechanism for a dredging cutter suction dredger, including a threaded base 1 and a stud 2. A stationary seat 3 is sleeved on the outside of the base 1. A collar 4 is fixedly disposed on the outside of the stationary seat 3. A top ring 5 is sleeved on the outside of the stud 2 inside the collar 4. A moving ring 6 is fixedly connected to the end of the top ring 5 away from the collar. A push ring 7 is disposed on the end of the moving ring 6 away from the top ring. A spring 8 is disposed at the end of the push ring 7. A spring seat 9 is sleeved between the spring 8 and the collar 4. A bushing 13 is disposed between the spring seat 9 and the stud 2.

[0025] In this embodiment, the base 1 and stud 2 are existing mechanisms of the reamer head. The base 1 is the power output end of the hydraulic motor, and the stud 2 is the fixed connection end of the reamer blade. The collar 4 is filled with lubricating oil. When the reamer head is connected to the hydraulic motor, the stationary seat 3 is the fixed ring of the mechanical seal mechanism, the top ring 5, the moving ring 6, and the push ring 7 are the moving rings of the mechanical seal mechanism, the spring 8 is the compression spring mechanism of the mechanical seal mechanism, and the bushing 13 is the positioning mechanism. During the use of the connection mechanism, the spring 8 will push the push ring 7 to push against the stationary seat 3, thereby actuating the moving ring 6 and the top ring 5, so that the top ring 5 is in contact with the outer surface of the stationary seat 3. Then, the hydraulic motor drives the base 1 and the stud 2 to rotate. The lubricating oil in the collar 4 seals the collar 4 with the stationary seat 3 and the collar 4 with the spring seat 9, improving the sealing performance of the reamer connection mechanism.

[0026] like Figure 4 As shown, a stationary groove is provided at one end of the stationary seat 3 near the base 1. A third rubber pad 17 is engaged in the stationary groove. A third bolt 18 connected to the base 1 is provided through the middle of the third rubber pad 17.

[0027] When the stationary seat 3 is in use, the third bolt 18 passes through the third rubber pad 17 and then enters the stationary seat 3. The third rubber pad 17 is then screwed into the base 1, connecting the stationary seat 3 and the base 1. The use of the third rubber pad 17 facilitates the sealing of the connection gap between the third bolt 18 and the stationary seat 3.

[0028] like Figure 3 As shown, the collar 4 is located outside the stationary seat 3 and the spring seat 9. A pressure-sensitive sheet 19 is fitted on one end of the collar 4 near the spring seat 9. The collar 4 is filled with lubricating oil. One end of the collar 4 is fixed on the stationary seat 3, and the other end is sealed to the spring seat 9 through the pressure-sensitive sheet 19. The use of lubricating oil increases the sealing performance between the collar 4 and the spring seat 9.

[0029] like Figure 2 As shown, the push ring 7 and the spring 8 are both located inside the spring seat 9. The top ring 5 is in contact with the end surface of the stationary seat 3. When the spring seat 9 is in use, the top ring 5, the moving ring 6, the push ring 7 and the spring 8 can be sealed to prevent external mud and water from entering the interior of the spring seat 9 and to protect the internal structure.

[0030] like Figure 5 As shown, a spring groove 10 is provided at one end of the spring seat 9 near the bushing 13. A first rubber pad 11 is engaged in the spring groove 10. A first bolt 12 connected to the bushing 13 is provided through the middle of the first rubber pad 11.

[0031] It is worth noting that after the spring seat 9 is fitted onto the collar 4, it will push the spring seat 9 toward the collar 4. Then, the first bolt 12 passes through the first rubber pad 11 and inserts the first rubber pad 11 into the spring groove 10. By rotating the first bolt 12 toward the stud 2, the first bolt 12 passes through the spring seat 9 and is tightened toward the bushing 13, thereby connecting the spring seat 9 and the bushing 13 and limiting and fixing the position of the spring seat 9.

[0032] like Figure 5 As shown, the end of the bushing 13 away from the spring seat 9 has a shaft groove 14, in which a second rubber pad 15 is engaged. The middle of the second rubber pad 15 has a second bolt 16 that is connected to the stud 2. Both ends of the bushing 13 have edge portions. When the bushing 13 is installed with the spring seat 9, the bushing 13 is engaged in the spring seat 9. The use of the edge portions at both ends of the bushing 13 facilitates the quick engagement of the bushing 13 into the spring seat 9, thereby limiting and fixing the bushing 13 to the spring seat 9 and increasing the connection between the stud 2 and the spring seat 9.

[0033] like Figure 5 As shown, a sealing ring 20 that fits with the stud 2 is embedded on the inner side of the bushing 13. When the bushing 13 is in use, the use of the sealing ring 20 facilitates the sealing treatment between the bushing 13 and the stud 2, thereby increasing the tightness of the connection between the bushing 13 and the stud 2.

[0034] In this embodiment of the invention, firstly, a stationary seat 3 is fitted onto the outside of the base 1. After the third bolt 18 passes through the third rubber pad 17, the third rubber pad 17 is inserted into the stationary groove of the stationary seat 3. Then, the third rubber pad 17 is rotated with a screwdriver and screwed into the base 1, and the stationary seat 3 is installed on the base 1. Next, a bushing 13, a spring seat 9, a spring 8, a push ring 7, a moving ring 6, and a top ring 5 are fitted onto the outside of the stud 2. The connection technology between the base 1 and the stud 2 in the existing reamer head connection mechanism is applied to connect the base 1 and the stud 2. Then, the top ring 5 is... Ring 5, moving ring 6, and push ring 7 are inserted into collar 4. Lubricating oil is added to collar 4. After spring seat 9 presses pressure sensitive sheet 19, its end passes through collar 4. The inner side of pressure sensitive sheet 19 is in contact with the outer surface of spring seat 9. Spring seat 9 is pressed against collar 4, and one edge of bushing 13 is inserted into spring seat 9. After limiting and fixing the position of spring seat 9, first bolt 12 is used to pass through first rubber pad 11 and insert first rubber pad 11 into spring groove 10. Then, first bolt 12 is rotated to screw the end of first bolt 12 into bushing 13, and bushing 13 is inserted into bushing 13. 13 is connected to the spring seat 9, and then the second bolt 16 is used to pass through the second rubber pad 15. The second rubber pad 15 is then inserted into the shaft groove 14. The second bolt 16 is rotated to screw the end of the second bolt 16 into the stud 2, completing the connection between the bushing 13 and the stud 2. During the use of the reamer head, the use of the stationary seat 3, collar 4, spring seat 9, and bushing 13 outside the base 1 and stud 2 can increase the static sealing function of the mechanism. When the reamer head is rotated, the power drive of the hydraulic motor at the end of the base 1 can drive the stud 2 and its external components. When the structure rotates, the lubricating oil in the collar 4 seals the connection between the collar 4 and the stationary seat 3 or the collar 4 and the spring seat 9, achieving a rotary seal of the connection mechanism. When the stud 2 and the base 1 are offset at an angle, the spring 8, push ring 7, moving ring 6 and top ring 5 are subjected to angular rotation, which causes the top ring 5 and the stationary seat 3 to offset at an angle. By utilizing the angular rotation between the stationary seat 3 and the top ring 5, the lubricating oil forms a liquid surface sealing film between the stationary seat 3 and the top ring 5, increasing the sealing strength between the stationary seat 3 and the top ring 5 and improving the sealing effect of the mechanism.

[0035] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A cutter head connection mechanism for a dredging cutter suction dredger, comprising a threaded base (1) and a stud (2), characterized in that: A stationary seat (3) is sleeved on the outside of the base (1). A collar (4) is fixedly installed on the outside of the stationary seat (3). A top ring (5) is sleeved on the outside of the stud (2) inside the collar (4). A moving ring (6) is fixedly connected to the end of the top ring (5) away from the collar. A push ring (7) is provided at the end of the moving ring (6) away from the top ring. A spring (8) is provided at the end of the push ring (7). A spring seat (9) is sleeved between the spring (8) and the collar (4). A bushing (13) is provided between the spring seat (9) and the stud (2). A stationary groove is opened at the end of the stationary seat (3) near the base (1). A third rubber pad (17) is engaged in the stationary groove. A third bolt (18) connected to the base (1) is provided through the middle of the third rubber pad (17). The collar (4) is located outside the stationary seat (3) and the spring seat (9). A pressure-sensitive sheet (19) is fitted on one end of the collar (4) near the spring seat (9). The collar (4) is filled with lubricating oil. The push ring (7) and the spring (8) are both located inside the spring seat (9). The top ring (5) is in contact with the end surface of the stationary seat (3). A spring groove (10) is provided on one end of the spring seat (9) near the bushing (13). A first rubber pad (11) is engaged in the spring groove (10). A first bolt (12) connected to the bushing (13) is provided through the middle of the first rubber pad (11). A shaft groove (14) is provided on one end of the bushing (13) away from the spring seat (9). A second rubber pad (15) is engaged in the shaft groove (14). A second bolt (16) connected to the stud (2) is provided through the middle of the second rubber pad (15). Both ends of the bushing (13) are provided with edge portions.

2. The cutterhead connecting mechanism of a dredging cutter suction dredger according to claim 1, characterized in that, The inner side of the bushing (13) is fitted with a sealing ring (20) that fits against the stud (2).

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