Underwater electro-hydraulic grinding wheel cutting device

Abstract

An underwater electro-hydraulic abrasive wheel cutting device includes a frame. A power assembly is mounted below the frame via connectors and locking components, driving a hydraulic control assembly. A clamping assembly and a feed assembly are mounted above the frame, with the feed assembly connected to a cutting assembly. The entire device is driven by electrical energy, which in turn powers a hydraulic pump driven by an electric motor. This device features an automatic clamping mechanism and a feed mechanism. During cutting, only the clamping mechanism needs to operate to fix the relative position of the cutting blade and the workpiece, eliminating the need for constant operator intervention. This significantly improves cutting accuracy and reduces operational difficulty and workload. Because the energy flow of this device is the pressure energy of hydraulic oil, it is safer, has a longer fatigue life, and lower noise. This invention is applicable to underwater workpiece cutting, offering convenient and fast cutting, effectively improving cutting efficiency and results, and is beneficial for industrial production with a promising market prospect.

Description

Technical Field

[0001] This invention relates to the field of marine engineering technology, and in particular to an underwater electro-hydraulic grinding wheel cutting device. Background Technology

[0002] Underwater cutting operations are extremely difficult due to the high pressure and sealing requirements of the deep sea. Most existing cutting wheels are hydraulically driven and use external hydraulic power sources, resulting in a large and heavy system. Considering that most small and medium-sized underwater robots do not typically have hydraulic power units, there is an urgent need to develop a modular and lightweight underwater cutting device to meet their underwater cutting operation requirements. Summary of the Invention

[0003] In response to the shortcomings of the existing production technology, the applicant provides an underwater electro-hydraulic abrasive wheel cutting device that integrates hydraulic power drive and control components. It can be quickly integrated into the end of an underwater robotic arm and can carry out underwater cutting operations simply by connecting to a power source and control signal. It has advantages such as modularity and miniaturization.

[0004] The technical solution adopted in this invention is as follows:

[0005] An underwater electro-hydraulic abrasive wheel cutting device includes a frame. A power assembly is installed below the frame via connectors and locking components. The power assembly drives a hydraulic control assembly. A clamping assembly and a feed assembly are installed on the top of the frame. The feed assembly is connected to the cutting assembly.

[0006] Its further technical solution lies in:

[0007] The frame structure includes two parallel inner frame plates, with a support rod installed between the two inner frame plates. Connectors and locking components are installed on the outer side of one of the inner frame plates. The bottom pins of the feed cylinder and the bottom pins of the clamping cylinder, which are connected to the feed assembly, are also installed between the two frame plates. The hydraulic cylinder base sleeve, clamping pin, and feed pin are fixed to the relative positions of the hydraulic cylinders on the pins. The rotating shaft sleeve and rotating shaft washer are fixed to the clamping assembly and the feed assembly.

[0008] The feed assembly includes a feed frame plate, a feed hydraulic rod pin sleeve, a feed frame support rod, and a feed hydraulic cylinder. The feed frame plate rotates around the feed pin.

[0009] The clamping assembly includes a clamping hydraulic cylinder, and the output end of the clamping hydraulic cylinder is fitted with a clamping head inner plate.

[0010] The distance between the two inner plates of the frame is greater than the distance between the two clamping heads and the distance between the feed frame plates, while the distance between the two clamping heads and the distance between the feed frame plates are equal.

[0011] The power assembly includes a hydraulic pump housing, which encloses a replenishing piston housing. Above the replenishing piston housing, an electric motor, a base, and a hydraulic pump are installed in sequence.

[0012] The hydraulic control assembly includes a servo system base, a safety valve, a hydraulic solenoid valve, a solenoid valve housing, and a replenishing piston. The lower part of the servo system base is connected to the hydraulic pump housing and the hydraulic pump, and the upper part is connected to the hydraulic solenoid valve and the solenoid valve housing, serving as a component for connecting and integrating the powertrain and the hydraulic control assembly.

[0013] The main body of the hydraulic pump housing is a hollow cylinder, with one end having a slightly larger inner diameter to fit into the oil replenishing piston housing. The oil replenishing piston housing at the fitting point is engraved with a sealing groove, and a sealing ring is used to seal the groove. The other end is rectangular and fits into the servo system base. The motor body and the hydraulic pump body are connected to the base by bolts. Inside the hydraulic pump housing, the hydraulic pump, base, and motor are arranged in order from top to bottom and are all connected by internal hex bolts. The motor is a DC brushless motor.

[0014] The cutting assembly includes a hydraulic motor, a hydraulic motor mounting base, a hydraulic motor bearing housing, a coupling, a coupling shaft, a bearing, a grinding wheel mounting shaft, a grinding wheel gasket, a saw blade, and a grinding wheel locking nut. These components are assembled sequentially. The hydraulic motor mounting base is cylindrical, with its outer diameter matching the diameter of the hydraulic motor's housing. Its bottom end is bolted to the hydraulic motor, and its top end is connected to the hydraulic motor bearing housing. Two side lugs connect to the feed frame. The coupling connects the hydraulic motor shaft and the coupling shaft at both ends. The coupling shaft is constrained by bearings on the hydraulic motor bearing housing. The bearings restrict the coupling shaft's freedom, leaving only a circumferential degree of freedom, thus ensuring that the grinding wheel mounting shaft and the grinding wheel rotate only around the coupling shaft.

[0015] The hydraulic motor bearing housing has internal retaining rings to separate the two bearings and prevent them from interfering with each other. A threaded hole parallel to the axial direction is designed on the circumferential wall for connection with the hydraulic motor mounting base. The hydraulic motor bearing housing lug has a threaded hole perpendicular to its axial direction for connection with the feed frame. The hydraulic motor bearing housing and the hydraulic motor mounting base securely connect the cutting assembly and the feed assembly, allowing the cutting assembly to feed. The grinding wheel fixing shaft is used to fix the cutting grinding wheel, which is button-shaped at one end and hollow cylindrical at the other. The diameter of the grinding wheel fixing shaft shoulder is larger than the outer ring of the grinding wheel fixing shaft, and the diameter of the grinding wheel fixing shaft connection surface is smaller than the size of the grinding wheel fixing shaft relief groove. It mates with the coupling shaft and is fastened together with internal hex bolts. Two grinding wheel washers clamp the grinding wheel in the middle, increasing the contact area between the grinding wheel and the grinding wheel fixing shaft, and then the grinding wheel is pressed onto the grinding wheel fixing shaft by the grinding wheel locking nut.

[0016] The beneficial effects of this invention are as follows:

[0017] This invention has a compact and reasonable structure and is easy to operate. Through the coordinated operation of the frame, power assembly, hydraulic control assembly, clamping assembly, feed assembly and cutting assembly, underwater cutting work can be easily completed.

[0018] The entire device is powered by electricity, which drives a hydraulic pump via an electric motor. It features an automatic clamping mechanism and a feeding mechanism. During cutting, only the clamping mechanism needs to operate to fix the relative position of the cutting blade and the workpiece, eliminating the need for constant operator intervention. This significantly improves cutting accuracy and reduces operational difficulty and workload. Because the energy flow is the pressure energy of hydraulic oil, it is safer, has a longer fatigue life, and lower noise. This invention is suitable for underwater workpiece cutting, offering convenient and fast cutting, effectively improving cutting efficiency and results, and is beneficial for industrial production with promising market prospects.

[0019] The frame of this invention comprises two frame plates, a support rod connecting the two frame plates, a connector and locking component connecting the power system, a bottom pin connecting the feed hydraulic cylinder and a bottom pin connecting the clamping cylinder, a hydraulic cylinder base sleeve fixing the relative position of the hydraulic cylinder on the pin, a clamping pin and a feed pin, and a rotating shaft sleeve and a rotating shaft washer fixing the relative position of the clamping head on the pin. The distance between the two frame plates is greater than the distance between the two clamping heads and the feed frame plate, and is approximately the length of the non-threaded portion of the connector. The distance between the two clamping heads and the feed frame plate is equal, and is approximately the axial length of the rotating shaft sleeve.

[0020] The powertrain described in this invention consists of a hydraulic pump housing enclosing a replenishing piston housing, an electric motor, a base, and the hydraulic pump. Its function is to convert electrical energy into the pressure energy of hydraulic oil. The hydraulic control assembly consists of a servo system base, a safety valve, a hydraulic solenoid valve, a solenoid valve housing, and a replenishing piston. The lower part of the servo system base is connected to the hydraulic pump housing and the hydraulic pump, while the upper part is connected to the hydraulic solenoid valve and its housing, serving as a component for connecting and integrating the powertrain and the hydraulic control assembly.

[0021] The hydraulic pump housing of this invention is a hollow cylinder, with one end having a slightly larger inner diameter to fit into the housing of the replenishing piston. The replenishing piston housing at this fit has a sealing groove with a sealing ring inside. The other end is rectangular and fits into the servo system base. The motor housing and hydraulic pump housing are bolted together and connected to the base. Inside the hydraulic pump housing, the hydraulic pump, base, and motor are arranged sequentially from top to bottom and connected using internal hexagonal bolts.

[0022] The electric motor described in this invention is a DC brushless motor. The hydraulic solenoid valves are three-position two-way valves, each controlling the clamping assembly, feed assembly, and cutting assembly respectively. Except for the safety valve, which uses its own threaded connection, all other components of the hydraulic control assembly are connected using hexagonal bolts.

[0023] The clamping assembly, feed assembly, and cutting assembly described in this invention are all actuators. The clamping assembly mainly includes a clamping hydraulic cylinder, an inner clamping head plate, an outer clamping head plate, a clamping hydraulic rod pin, a clamping hydraulic rod pin sleeve, a clamping head support rod, and a clamping head support rod. The extension and retraction of the clamping cylinder's telescopic rod causes the clamping head to rotate around the clamping pin, changing the relative position of the clamping head and the machine frame to achieve workpiece clamping. The feed assembly consists of a feed frame, a feed hydraulic rod pin, a feed hydraulic rod pin sleeve, a feed frame support rod, and a feed hydraulic cylinder. The feed frame can rotate around the feed pin.

[0024] The cutting assembly of the present invention consists of a hydraulic motor, a hydraulic motor mounting base, a hydraulic motor bearing housing, a coupling, a coupling shaft, a bearing, a grinding wheel mounting shaft, a grinding wheel gasket, a saw blade, and a grinding wheel locking nut. The components are assembled in the above order.

[0025] The hydraulic motor mounting base of this invention is cylindrical in shape, with an outer diameter identical to that of the hydraulic motor's housing. Its bottom end is connected to the hydraulic motor via bolts, and its top end is connected to the hydraulic motor bearing housing. Two lifting lugs on the side are connected to the feed frame. The coupling connects the hydraulic motor shaft and the coupling shaft at both ends, respectively. The coupling shaft is constrained to the hydraulic motor bearing housing by bearings, which restrict the coupling shaft's degree of freedom, leaving only a circumferential degree of freedom. This ensures that the grinding wheel's fixed shaft and the grinding wheel rotate only around the coupling shaft.

[0026] The hydraulic motor bearing housing of this invention has an internal retaining ring to separate the two bearings and prevent them from interfering with each other; a threaded hole parallel to the axial direction is designed on the circumferential wall for connection with the hydraulic motor mounting base; and a threaded hole perpendicular to the axial direction is provided on the lug of the hydraulic motor bearing housing for connection with the feed frame. The hydraulic motor bearing housing and the hydraulic motor mounting base fix the cutting assembly and the feed assembly together, allowing the cutting assembly to be fed.

[0027] The grinding wheel fixing shaft of this invention is used to fix the cutting grinding wheel. It has a button-shaped end and a hollow cylindrical end. The diameter of the grinding wheel fixing shaft shoulder is slightly larger than the outer ring of the grinding wheel fixing shaft, and the diameter of the grinding wheel fixing shaft connecting surface is smaller than the size of the grinding wheel fixing shaft's relief groove. It mates with the coupling shaft and is fastened together by internal hex bolts. Two grinding wheel washers clamp the grinding wheel in the middle, increasing the contact area between the grinding wheel and the grinding wheel fixing shaft, and then the grinding wheel is pressed tightly onto the grinding wheel fixing shaft by the grinding wheel locking nut. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall assembly of the present invention.

[0029] Figure 2 This is an exploded view of the overall assembly of the present invention.

[0030] Figure 3 This is a schematic diagram of the frame of the present invention.

[0031] Figure 4 This is an exploded view of the power and hydraulic control assembly of the present invention.

[0032] Figure 5 This is a schematic diagram of the feed assembly of the present invention.

[0033] Figure 6 This is an exploded view of the cut assembly of the present invention.

[0034] Figure 7 This is a schematic diagram of the frame plate of the present invention.

[0035] Figure 8 This is a schematic diagram of the tail base invented by our company.

[0036] Figure 9 This is a schematic diagram of the fixed shaft of the grinding wheel disc of the present invention.

[0037] Figure 10 This is a schematic diagram of the hydraulic motor bearing housing of the present invention.

[0038] Figure 11 This is a schematic diagram of the clamping head of the present invention.

[0039] Figure 12 This is a schematic diagram of the feed frame of the present invention.

[0040] The components include: 1. Powertrain; 2. Hydraulic control assembly; 3. Frame; 4. Clamping assembly; 5. Feed assembly; 6. Cutting assembly.

[0041] 21. Hydraulic solenoid valve; 22. Hydraulic servo valve cover; 23. Solenoid valve housing;

[0042] 31. Inner plate of the frame; 32. Bottom pin of the feed cylinder; 33. Bottom pin of the clamping cylinder; 34. Power locking component;

[0043] 41. Clamping head inner plate; 42. Clamping hydraulic cylinder;

[0044] 51. Feed frame; 52. Feed hydraulic cylinder;

[0045] 61. Saw blade; 62. Hydraulic motor;

[0046] 33A. Clamping cylinder bottom pin;

[0047] 35A, Support rod;

[0048] 36A, pivot sleeve; 36B, hydraulic cylinder base sleeve;

[0049] 37. Shaft washer; 38. Locking component;

[0050] 39A. Clamping pin; 39B. Feed pin;

[0051] 11. Hydraulic pump housing; 12. Replenishing piston housing; 13. Electric motor; 14. Base; 15. Hydraulic pump;

[0052] 24. Safety valve; 25. Servo system base;

[0053] 51. Feed frame plate; 52. Feed hydraulic cylinder; 53. Feed hydraulic rod pin sleeve; 54. Feed frame support rod;

[0054] 61. Saw blade; 62. Hydraulic motor;

[0055] 621. Hydraulic motor shaft;

[0056] 63. Hydraulic motor mounting base; 64. Hydraulic motor bearing housing; 65. Coupling; 66. Coupling shaft; 67. Bearing; 68. Grinding wheel mounting shaft; 69. Grinding wheel gasket;

[0057] 6X, Grinding wheel locking nut;

[0058] 311. Support rod hole; 312. Clamping pin hole; 313. Feed pin hole; 314. Locking component connection hole; 315. Clamping cylinder bottom pin hole; 316. Feed cylinder bottom pin hole;

[0059] 411. Clamping head support frame hole; 412. Clamping head hydraulic rod pin hole; 413. Clamping head clamping pin hole;

[0060] 511. Feed pin hole of feed frame; 512. Feed frame support hole; 513. Hydraulic rod pin hole of feed frame; 514. Threaded hole for feed frame connection;

[0061] 141. Base limiting clip; 142. Base countersunk hole; 143. Base upper surface; 144. Base limiting clip bolt hole; 145. Base inner cavity;

[0062] 641. Hydraulic motor bearing housing body; 642. Hydraulic motor bearing housing lug; 643. Hydraulic motor bearing housing inner ring shoulder; 644. Hydraulic motor bearing housing inner ring.

[0063] 681. Grinding wheel fixing shoulder; 682. Grinding wheel fixing outer ring; 683. Grinding wheel fixing connecting surface; 684. Grinding wheel fixing groove; 685. Grinding wheel fixing body. Detailed Implementation

[0064] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0065] like Figures 1-12 As shown, the underwater electro-hydraulic abrasive wheel cutting device of this embodiment includes a frame 3. A power assembly 1 is installed below the frame 3 via a connector 34 and a locking member 38. The power assembly 1 drives the hydraulic control assembly 2. A clamping assembly 4 and a feed assembly 5 are installed on the top of the frame 3. The feed assembly 5 is connected to the cutting assembly 6.

[0066] The frame 3 has the following structure: it includes two parallel inner frame plates 31 spaced apart, a support rod 35A is installed between the two inner frame plates 31, a connector 34 and a locking member 38 are installed on the outer side of one of the inner frame plates 31, a bottom pin 32 of the feed cylinder and a bottom pin 33 of the clamping cylinder connected to the feed assembly 5 are also installed between the two frame plates 31, as well as a hydraulic cylinder base sleeve 36B, a clamping pin 39A and a feed pin 39B that fix the relative positions of the hydraulic cylinders on the pins, and a rotating shaft sleeve 36A and a rotating shaft washer 37 that fix the clamping assembly 4 and the feed assembly 5.

[0067] The feed assembly 5 includes a feed frame plate 51, a feed hydraulic rod pin sleeve 53, a feed frame support rod 54, and a feed hydraulic cylinder 52. The feed frame plate 51 rotates around the feed pin 39B.

[0068] The clamping assembly 4 includes a clamping hydraulic cylinder 42, and the output end of the clamping hydraulic cylinder 42 is fitted with a clamping head inner plate 41.

[0069] The distance between the two inner plates 31 of the frame is greater than the distance between the two clamping heads 41 and the distance between the feed frame plate 51. The distance between the two clamping heads 41 and the distance between the feed frame plate 51 are equal.

[0070] The powertrain 1 includes a hydraulic pump housing 11, which encloses a replenishing piston housing 12. An electric motor 13, a base 14, and a hydraulic pump 15 are sequentially mounted on top of the replenishing piston housing 12.

[0071] The hydraulic control assembly 2 includes a servo system base 25, a safety valve 24, a hydraulic solenoid valve 21, a solenoid valve housing 22, and a replenishing piston 23. The lower part of the servo system base 25 is connected to the hydraulic pump housing 11 and the hydraulic pump 15, and the upper part is connected to the hydraulic solenoid valve 21 and the solenoid valve housing 22, serving as a component for connecting and integrating the power assembly 1 and the hydraulic control assembly 2.

[0072] The main body of the hydraulic pump housing 11 is a hollow cylinder with a slightly larger inner diameter at one end, which is embedded in the oil replenishing piston housing 12. The oil replenishing piston housing 12 at the mating point is engraved with a sealing groove, and a sealing ring is sealed in the groove. The other end is rectangular and is matched with the servo system base 25. The motor 13 body and the hydraulic pump 15 body are connected to the base 14 by bolts. Inside the hydraulic pump housing 11, the hydraulic pump 15, the base 14, and the motor 13 are arranged in order from top to bottom and are all connected by internal hex bolts. The motor 13 is a DC brushless motor.

[0073] The cutting assembly 6 includes a hydraulic motor 62, a hydraulic motor mounting base 63, a hydraulic motor bearing housing 64, a coupling 65, a coupling shaft 66, a bearing 67, a grinding wheel mounting shaft 68, a grinding wheel gasket 69, a saw blade 61, and a grinding wheel locking nut 6X. The components are assembled in sequence. The hydraulic motor mounting base 63 is cylindrical in shape, and its outer diameter is the same as the outer diameter of the hydraulic motor 62. The bottom end is connected to the hydraulic motor by bolts, and the top end is connected to the hydraulic motor bearing housing 64. Two lifting lugs on the side are connected to the feed frame 31. The two ends of the coupling 65 are connected to the hydraulic motor shaft 621 and the coupling shaft, respectively. The coupling shaft is constrained on the hydraulic motor bearing housing 64 by the bearing 67. The bearing restricts the freedom of the coupling shaft, leaving only one circumferential degree of freedom, thereby ensuring that the grinding wheel mounting shaft 68 and the grinding wheel 61 rotate only around the coupling shaft.

[0074] The hydraulic motor bearing housing 64 has a retaining ring 643 inside to separate the two bearings 67 so that they do not interfere with each other; a threaded hole parallel to the axial direction is designed on the circumferential wall to connect with the hydraulic motor mounting base 63; the hydraulic motor bearing housing lug 642 has a threaded hole perpendicular to its axial direction for connecting the feed frame 31; the hydraulic motor bearing housing 64 and the hydraulic motor mounting base 63 fix the cutting assembly 6 and the feed assembly 4 together, allowing the cutting assembly to feed; the grinding wheel fixing shaft 68 is used to fix the cutting grinding wheel 61, cutting... The grinding wheel 61 is button-shaped at one end and hollow cylindrical at the other. The diameter of the grinding wheel fixed shaft shoulder 681 is larger than the outer ring 682 of the grinding wheel fixed shaft. The diameter of the grinding wheel fixed shaft connecting surface 683 is smaller than the size of the grinding wheel fixed shaft relief groove 684. It is matched with the coupling shaft 66 and fastened together by internal hex bolts. Two grinding wheel shims 69 clamp the grinding wheel 61 in the middle to increase the contact area between the grinding wheel and the grinding wheel fixed shaft 68. Then, the grinding wheel is pressed onto the grinding wheel fixed shaft 68 by the grinding wheel locking nut 6X.

[0075] The specific structure and function of the underwater electro-hydraulic abrasive wheel cutting device described in this invention are as follows:

[0076] It mainly includes a frame 3, a power assembly 1 fixed to the frame 3 by connecting parts and locking parts 38, a hydraulic control assembly 2 driven by the power assembly 1, a clamping assembly 4 that cooperates with the frame 3, a feed assembly 5 that cooperates with the frame 3, and a cutting assembly 6 fixed to the feed assembly 5.

[0077] The frame 3 consists of two inner frame plates 31, a support rod 35A connecting the two frame plates 31, a connector and locking component 38 connecting the power system, a bottom pin 32 for the feed cylinder and a bottom pin 33A for the clamping cylinder connecting the feed hydraulic cylinder 52, a hydraulic cylinder base sleeve 36B fixing the relative position of the hydraulic cylinders on the pins, a clamping pin 39A and a feed pin 39B, a clamping head inner plate 41 fixing the clamping head inner plate 41, a rotating shaft sleeve 36A fixing the relative position of the feed frame on the pins, and a rotating shaft washer 37. The distance between the two inner frame plates 31 is greater than the distance between the two clamping head inner plates 41 and the feed frame plate 51, and is approximately the length of the non-threaded portion of the connector. The distance between the two clamping head inner plates 41 and the feed frame plate 51 is equal, and is approximately the axial length of the rotating shaft sleeve 36A.

[0078] The inner plate 31 of the frame has a support rod hole 311, a clamping pin hole 312, a feed pin hole 313, a locking component connection hole 314, a clamping cylinder bottom pin hole 315, and a feed cylinder bottom pin hole 316.

[0079] The inner plate 41 of the clamping head has a clamping head support frame hole 411, a clamping head hydraulic rod pin hole 412, and a clamping head clamping pin hole 413.

[0080] The feed frame plate 51 has a feed frame feed pin hole 511, a feed frame support hole 512, a feed frame hydraulic rod pin hole 513, and a feed frame connecting threaded hole 514.

[0081] The base 14 is provided with a base limiting clip 141, a base countersunk hole 142, a base upper surface 143, a base limiting clip bolt hole 144, and a base inner cavity 145.

[0082] The hydraulic motor bearing housing 64 is provided with a hydraulic motor bearing housing body 641, a hydraulic motor bearing housing lug 642, a hydraulic motor bearing housing inner ring shoulder 643, and a hydraulic motor bearing housing inner ring 644.

[0083] The powertrain 1 consists of a hydraulic pump housing 11 enclosing a replenishing piston housing 12, an electric motor 13, a base 14, and a hydraulic pump 15. Its function is to convert electrical energy into hydraulic pressure energy. The hydraulic control assembly 2 consists of a servo system base 25, a safety valve 24, a hydraulic solenoid valve 21, a solenoid valve housing 22, and a replenishing piston 23. The lower part of the servo system base 25 is connected to the hydraulic pump housing 11 and the hydraulic pump 15, and the upper part is connected to the hydraulic solenoid valve 21 and the solenoid valve housing 22, serving as the component connecting and integrating the powertrain 1 and the hydraulic control assembly 2.

[0084] The hydraulic pump housing 11 is primarily a hollow cylinder, with one end having a slightly larger inner diameter to interlock with the replenishing piston housing 12. The replenishing piston housing 12 at the mating point has a sealing groove with a sealing ring inside. The other end is rectangular, fitting with the servo system base 25 and connecting the motor 13 body and the hydraulic pump 15 body to the base 14 via bolts. Inside the hydraulic pump housing 11, the hydraulic pump 15, base 14, and motor 13 are arranged sequentially from top to bottom and are all connected with internal hexagonal bolts.

[0085] The electric motor 13 is a DC brushless motor. The hydraulic solenoid valves are three-position two-way valves, each controlling the clamping assembly 4, the feed assembly 5, and the cutting assembly 6 respectively. Except for the safety valve 24, which uses its own threaded connection, all other components of the hydraulic control assembly 2 are connected using hexagonal bolts.

[0086] The clamping assembly 4, feed assembly 5, and cutting assembly 6 are all actuators. The clamping assembly mainly includes a clamping hydraulic cylinder 42, a clamping head inner plate 41, a clamping head outer plate 43, a clamping hydraulic rod pin 45, a clamping hydraulic rod pin sleeve 44, a clamping head support rod 46, and a clamping head support rod 46. The extension and retraction of the telescopic rod of the clamping hydraulic cylinder 42 causes the clamping head inner plate 41 to rotate around the clamping pin 39A, changing the relative position of the clamping head and the frame inner plate 31 to achieve workpiece clamping. The feed assembly 5 consists of a feed frame 51, a feed hydraulic rod pin sleeve 53, a feed frame support rod 54, and a feed hydraulic cylinder 52. The feed frame 51 can rotate around the feed pin 39B.

[0087] The cutting assembly 6 consists of a hydraulic motor 62, a hydraulic motor mounting base 63, a hydraulic motor bearing housing 64, a coupling 65, a coupling shaft 66, a bearing 67, a grinding wheel mounting shaft 68, a grinding wheel gasket 69, a saw blade 61, and a grinding wheel locking nut 6X. The components are assembled in the above order.

[0088] The hydraulic motor mounting base 63 is cylindrical in shape, with an outer diameter identical to that of the hydraulic motor 62's housing. Its bottom end is bolted to the hydraulic motor, and its top end is connected to the hydraulic motor bearing housing 64. Two side lugs connect to the inner plate 31 of the feed frame. The coupling 65 connects the hydraulic motor shaft 621 and the coupling shaft 66 at its two ends, respectively. The coupling shaft is constrained to the hydraulic motor bearing housing 64 by a bearing 67. The bearing 67 restricts the freedom of the coupling shaft 66, leaving only a circumferential degree of freedom, thus ensuring that the grinding wheel mounting shaft 68 and the grinding wheel rotate only around the coupling shaft 66.

[0089] The hydraulic motor bearing housing 64 has a retaining ring 643 inside to separate the two bearings 67 so that they do not interfere with each other. A threaded hole parallel to the axial direction is designed on the circumferential wall for connection with the hydraulic motor mounting base 63. The hydraulic motor bearing housing lug 642 has a threaded hole perpendicular to its axial direction for connection with the inner plate 31 of the feed frame. The hydraulic motor bearing housing 64 and the hydraulic motor mounting base 63 fix the cutting assembly 6 and the feed assembly 4 together, allowing the cutting assembly to be fed.

[0090] The grinding wheel fixing shaft 68 is used to fix the cutting grinding wheel. It has a button-shaped end and a hollow cylindrical end. The diameter of the grinding wheel fixing shaft shoulder 681 is slightly larger than the outer ring 682, and the diameter of the grinding wheel fixing shaft connecting surface 683 is smaller than the size of the grinding wheel fixing shaft relief groove 684. It mates with the coupling shaft 66 and is fastened together by internal hex bolts. Two grinding wheel washers 69 clamp the grinding wheel in the middle, increasing the contact area between the grinding wheel and the grinding wheel fixing shaft 68. Then, the grinding wheel is pressed onto the grinding wheel fixing shaft 68 by the grinding wheel locking nut 6X.

[0091] The working process of this embodiment is as follows:

[0092] When the device is in operation, the electric motor 13 drives the hydraulic pump 15 to pump hydraulic oil into the hydraulic control assembly 2. The hydraulic control assembly 2 is connected to the feed hydraulic cylinder 52, the clamping hydraulic cylinder 42, and the hydraulic motor 62 via hydraulic hoses. The hydraulic control assembly 2 then controls the oil flow, directing the hydraulic oil into the clamping hydraulic cylinder 42. The hydraulic rod of the clamping hydraulic cylinder 42 extends, causing the inner plate 41 of the clamping head to move. This reduces the distance between the inner plate 41 of the clamping head and the inner plate 31 of the frame, placing the workpiece to be cut between them. As the hydraulic rod extends, the workpiece is clamped. Then, the hydraulic control assembly 2 closes the inlet and outlet oil circuits of the clamping hydraulic cylinder 42, and the clamping mechanism self-locks. Next, the hydraulic control assembly 2 opens the inlet and outlet oil circuits of the hydraulic motor 62, causing the hydraulic motor 62 to operate and the saw blade 61 to rotate, ready for cutting. Once the saw blade 61 reaches a certain speed, the feed hydraulic cylinder 52's inlet and outlet oil circuits are simultaneously activated. The hydraulic rod of the feed hydraulic cylinder 52 extends, driving the feed frame 51 to move around the feed shaft pad 37 towards the inner plate 41 of the clamping head. After the workpiece to be cut is completed, the hydraulic control assembly 2 controls the feed hydraulic cylinder 52 to switch its inlet and outlet oil circuits. The hydraulic rod of the feed hydraulic cylinder 52 then retracts, driving the feed frame 51 to move around the feed shaft pad 37 away from the inner plate 41 of the clamping head. The feed hydraulic cylinder 52's inlet and outlet oil circuits close after its maximum retraction stroke. Then, the hydraulic motor 62's inlet and outlet oil circuits are closed. Finally, the clamping hydraulic cylinder 42's inlet and outlet oil circuits are opened, causing its hydraulic rod to retract, driving the clamping head to move around the clamping pin 39A away from the inner plate 31 of the frame, releasing the workpiece, and completing the cutting.

[0093] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. An underwater electro-hydraulic abrasive wheel cutting device, characterized by: The frame (3) includes a power assembly (1) mounted below the frame (3) via a connector (34) and a locking member (38). The power assembly (1) drives the hydraulic control assembly (2). A clamping assembly (4) and a feed assembly (5) are mounted on the top of the frame (3). The feed assembly (5) is connected to the cutting assembly (6). The frame (3) has the following structure: it includes two parallel inner frame plates (31) spaced apart. A support is installed between the two inner frame plates (31). The strut (35A) has a connector (34) and a locking element (38) mounted on the outside of one of the inner plates (31) of the frame. Between the two inner plates (31) are also installed a bottom pin (32) of the feed cylinder and a bottom pin (33) of the clamping cylinder connected to the feed assembly (5), as well as a hydraulic cylinder base sleeve (36B), a clamping pin (39A) and a feed pin (39B) that fix the relative positions of the hydraulic cylinders on the pins, and a clamping assembly (4) and a feed pin that fix the clamping assembly (5). The feed assembly (5) includes a rotating bushing (36A) and a rotating washer (37); the feed assembly (5) includes a feed frame plate (51), a feed hydraulic rod pin bushing (53), a feed frame support rod (54), and a feed hydraulic cylinder (52), the feed frame plate (51) rotating around the feed pin (39B); the clamping assembly (4) includes a clamping hydraulic cylinder (42), the output end of which is fitted with a clamping head inner plate (41); the two frame inner plates (31) The distance between them is greater than the distance between the inner plates of the two clamping heads (41) and the distance between the feed frame plate (51). The distance between the inner plates of the two clamping heads (41) and the distance between the feed frame plate (51) are equal. The power assembly (1) includes a hydraulic pump housing (11), which encloses the oil replenishing piston housing (12). The electric motor (13), the base (14), and the hydraulic pump (15) are installed in sequence above the oil replenishing piston housing (12).

2. An underwater electro-hydraulic abrasive wheel cutting device as claimed in claim 1, characterized in that: The hydraulic control assembly (2) includes a servo system base (25), a safety valve (24), a hydraulic solenoid valve (21), a solenoid valve housing (22), and a replenishing piston (23). The lower part of the servo system base (25) is connected to the hydraulic pump housing (11) and the hydraulic pump (15), and the upper part is connected to the hydraulic solenoid valve (21) and the solenoid valve housing (22), serving as a component for connecting and integrating the powertrain (1) and the hydraulic control assembly (2).

3. An underwater electro-hydraulic abrasive wheel cutting device as claimed in claim 2, characterized in that: The main body of the hydraulic pump housing (11) is a hollow cylinder with a slightly larger inner diameter at one end, which is embedded in the oil replenishing piston housing (12). The oil replenishing piston housing (12) at the mating point is engraved with a sealing groove, and a sealing ring is sealed in the groove. The other end is rectangular and matches the servo system base (25). The motor (13) body and the hydraulic pump (15) body are connected by bolts to the base (14). Inside the hydraulic pump housing (11), the hydraulic pump (15), base (14), and motor (13) are arranged from top to bottom and are all connected by internal hex bolts. The motor (13) is a DC brushless motor.

4. An underwater electro-hydraulic abrasive wheel cutting device as claimed in claim 3, characterized in that: The cutting assembly (6) includes a hydraulic motor (62), a hydraulic motor mounting base (63), a hydraulic motor bearing housing (64), a coupling (65), a coupling shaft (66), a bearing (67), a grinding wheel mounting shaft (68), a grinding wheel gasket (69), a saw blade (61), and a grinding wheel locking nut (6X). These components are assembled sequentially. The hydraulic motor mounting base (63) is cylindrical in shape, and its outer diameter is approximately equal to the outer diameter of the hydraulic motor (62). Similarly, the bottom end is connected to the hydraulic motor by bolts, the top end is connected to the hydraulic motor bearing seat (64), the two side lugs are connected to the feed frame plate (51), the two ends of the coupling (65) are connected to the hydraulic motor shaft (621) and the coupling shaft respectively, and the coupling shaft is constrained on the hydraulic motor bearing seat (64) by the bearing (67). The bearing restricts the degree of freedom of the coupling shaft, leaving only one circumferential degree of freedom, thereby ensuring that the grinding wheel fixed shaft (68) and the grinding wheel (61) only rotate around the coupling shaft.

5. An underwater electro-hydraulic abrasive wheel cutting device as claimed in claim 4, characterized in that: The hydraulic motor bearing housing (64) has a retaining ring (643) inside to separate the two bearings (67) so that they do not interfere with each other; a threaded hole parallel to the axial direction is designed on the circumferential wall to connect with the hydraulic motor mounting base (63); the hydraulic motor bearing housing lug (642) has a threaded hole perpendicular to its axial direction for connecting the feed frame plate (51); the hydraulic motor bearing housing (64) and the hydraulic motor mounting base (63) fix the cutting assembly (6) and the feed assembly (4) together, so that the cutting assembly can be fed; the grinding wheel fixing shaft (68) is used to fix the cutting grinding wheel (61). The cutting grinding wheel (61) is button-shaped at one end and hollow cylindrical at the other end. The diameter of the grinding wheel fixed shaft shoulder (681) is larger than the outer ring (682) of the grinding wheel fixed shaft. The diameter of the grinding wheel fixed shaft connecting surface (683) is smaller than the size of the grinding wheel fixed shaft relief groove (684) and it is matched with the coupling shaft (66) and fastened together by internal hexagonal bolts. Two grinding wheel shims (69) sandwich the grinding wheel (61) in the middle, increasing the contact area between the grinding wheel and the grinding wheel fixed shaft (68). Then, the grinding wheel is pressed onto the grinding wheel fixed shaft (68) by the grinding wheel locking nut (6X).

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