Underwater electric grinding tool

Abstract

According to the underwater electric grinding tool, a brush motor and a speed reducer of the underwater electric grinding tool are reliably packaged in a sealed shell, so that electrical components in the brush motor are completely isolated from an external deepwater operation environment, the working stability of the underwater electric grinding tool is guaranteed, and the performance is more reliable; the sealing shell of the underwater electric polishing tool is connected with the outside only through the oil-filled water-tight cable, on one hand, the oil-filled water-tight cable can supply power to the brush motor, and on the other hand, pressure compensation oil can be dynamically filled into the sealing shell. The pressure balance of the underwater electric grinding tool at different diving depths along with the underwater robot can be effectively ensured, so that the underwater electric grinding tool can better adapt to working environments with different water depths, and the underwater electric grinding tool has the characteristics of small size, light weight, low power consumption and high integration level in structural design; the sealing shell of the underwater electric grinding tool is connected through bolts, and maintenance and debugging are more convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of deepwater engineering, in particular to an underwater electric grinding tool. Background Art

[0002] For small and medium-sized underwater robots with their own energy sources, when operating in deep water environments, the surface of underwater targets is often covered with a layer of hard calcification. In order to better observe the underwater targets, it is necessary to separate the calcification from the surface of the underwater targets. The simplest way is to directly polish the surface of the target in the water environment.

[0003] Due to the particularity of deepwater operations, the requirements for grinding tools are relatively stringent. They must have the characteristics of small size and weight, low power consumption, high integration, pressure compensation, reliable performance, and easy maintenance and debugging. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model provides an underwater electric grinding tool with the characteristics of small size and weight, low power consumption, high integration, pressure compensation, reliable performance, and easy maintenance and debugging.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: an underwater electric grinding tool, including a brush motor, a reducer, a sealed housing and a grinding head; the motor shaft of the brush motor is coaxially fixedly connected to the power input shaft of the reducer, and the brush motor and the reducer are both fixedly installed inside the sealed housing; the grinding head is located outside the sealed housing, and the grinding head is transmission-connected to the power output shaft of the reducer.

[0006] The sealing shell includes a front end cover, an intermediate cylinder shell and a rear end cylinder shell; the intermediate cylinder shell is a structure with openings at both ends; the rear end cylinder shell is a structure with openings on one side; the front end cover is fixedly installed at the front end cylinder mouth of the intermediate cylinder shell, the front end cover and the intermediate cylinder shell are fastened together by bolts, and a first static sealing ring is installed between the annular contact surfaces of the front end cover and the intermediate cylinder shell; the rear end cylinder mouth of the intermediate cylinder shell is fixedly connected to the front end cylinder mouth of the rear end cylinder shell, the intermediate cylinder shell and the rear end cylinder shell are fastened together by bolts, and a second static sealing ring is installed between the annular contact surfaces of the intermediate cylinder shell and the rear end cylinder shell.

[0007] The brushed motor is fixedly installed inside the rear end cylinder shell; the reducer is fixedly installed inside the middle cylinder shell, and a transmission shaft is coaxially fixedly sleeved on the power output shaft of the reducer, and the transmission shaft and the power output shaft of the reducer are fixedly connected by a flat key.

[0008] The transmission shaft seal passes through the front end cover of the sealing housing, and a wear-resistant ring and a rotary step seal are sequentially arranged from the inside to the outside between the transmission shaft and the wall of the transmission shaft passing hole on the front end cover.

[0009] A deep groove ball bearing is also installed between the transmission shaft behind the rotary step seal and the wall of the transmission shaft through-hole on the front end cover. The outer ring of the deep groove ball bearing is interference fit with the wall of the transmission shaft through-hole on the front end cover, and the inner ring of the deep groove ball bearing is interference fit with the transmission shaft; a bearing locating ring and a shaft retaining ring are sequentially installed on the transmission shaft behind the inner ring of the deep groove ball bearing.

[0010] The sealed shell is filled with pressure compensation oil, and an oil filling joint and a cable joint are respectively installed on the bottom plate of the sealed end of the rear end cylinder shell of the sealed shell; the oil filling joint and the cable joint are fastened to the bottom plate of the sealed end of the rear end cylinder shell by screwing.

[0011] A third static sealing ring is installed between the oil-filled joint and the annular contact surface of the bottom plate of the rear end cylinder shell sealing end; a fourth static sealing ring is installed between the cable joint and the annular contact surface of the bottom plate of the rear end cylinder shell sealing end.

[0012] The cable connector is sealed and connected to an oil-filled watertight cable through a clamp, and the oil-filled watertight cable is electrically connected to the control end of the brush motor.

[0013] The grinding head is fixedly connected to the end of the transmission shaft through a clamping limit plate, and the clamping limit plate and the end of the transmission shaft are fastened together by bolts.

[0014] A T-shaped handle is fixedly installed on the top end of the middle cylinder shell of the sealing shell, and the T-shaped handle is fastened to the middle cylinder shell by bolts.

[0015] Beneficial effects of the utility model:

[0016] The underwater electric grinding tool of the present invention has a brush motor and a reducer which can be reliably encapsulated inside a sealed shell, so that the electrical components in the brush motor are completely isolated from the external deep-water operating environment, thereby ensuring the working stability of the underwater electric grinding tool and making its performance more reliable; the sealed shell is only connected to the outside through an oil-filled watertight cable, which can supply power to the brush motor on the one hand, and dynamically fill the sealed shell with pressure compensation oil on the other hand, thereby effectively ensuring the pressure balance of the underwater electric grinding tool at different diving depths of the underwater robot, so as to better adapt to different water depth operating environments, so that its structural design has the characteristics of small size and weight, low power consumption and high integration; the sealed shell adopts a bolt connection form, which is more convenient for maintenance and debugging. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of an underwater electric grinding tool (overall) of the present utility model (viewpoint one);

[0018] Figure 2This is a structural schematic diagram (viewing angle 2) of an underwater electric grinding tool (partial cross-section) of the present invention;

[0019] In the figure, 1 is a brushed motor, 2 is a reducer, 3 is a sealing housing, 4 is a grinding head, 5 is a front end cover, 6 is an intermediate cylinder shell, 7 is a rear end cylinder shell, 8 is a first static sealing ring, 9 is a second static sealing ring, 10 is a transmission shaft, 11 is a wear-resistant ring, 12 is a rotary step seal, 13 is a deep groove ball bearing, 14 is a bearing locating ring, 15 is a shaft retaining ring, 16 is an oil-filled joint, 17 is a cable joint, 18 is a third static sealing ring, 19 is a fourth static sealing ring, 20 is an oil-filled watertight cable, 21 is a clamping limit plate, and 22 is a T-handle. DETAILED DESCRIPTION

[0020] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1 、 2 As shown, an underwater electric grinding tool includes a brush motor 1, a reducer 2, a sealed housing 3 and a grinding head 4; the motor shaft of the brush motor 1 is coaxially fixedly connected to the power input shaft of the reducer 2, and the brush motor 1 and the reducer 2 are both fixedly installed inside the sealed housing 3; the grinding head 4 is located outside the sealed housing 3, and the grinding head 4 is transmission-connected to the power output shaft of the reducer 2.

[0022] The sealing shell 3 includes a front end cover 5, an intermediate cylinder shell 6 and a rear end cylinder shell 7; the intermediate cylinder shell 6 is a structure with openings at both ends; the rear end cylinder shell 7 is a structure with openings on one side; the front end cover 5 is fixedly installed at the front end cylinder mouth of the intermediate cylinder shell 6, the front end cover 5 and the intermediate cylinder shell 6 are fastened together by bolts, and a first static sealing ring 8 is installed between the annular contact surfaces of the front end cover 5 and the intermediate cylinder shell 6; the rear end cylinder mouth of the intermediate cylinder shell 6 is fixedly connected to the front end cylinder mouth of the rear end cylinder shell 7, the intermediate cylinder shell 6 and the rear end cylinder shell 7 are fastened together by bolts, and a second static sealing ring 9 is installed between the annular contact surfaces of the intermediate cylinder shell 6 and the rear end cylinder shell 7.

[0023] The brushed motor 1 is fixedly mounted inside the rear end cylindrical shell 7; the reducer 2 is fixedly mounted inside the middle cylindrical shell 6, and a transmission shaft 10 is coaxially fixedly sleeved on the power output shaft of the reducer 2, and the transmission shaft 10 is fixedly connected to the power output shaft of the reducer 2 by a flat key.

[0024] The transmission shaft 10 passes through the front end cover 5 of the sealing housing 3 in a sealed manner. A wear-resistant ring 11 and a rotary step seal 12 are sequentially arranged between the transmission shaft 10 and the wall of the transmission shaft passing hole on the front end cover 8 from the inside to the outside.

[0025] A deep groove ball bearing 13 is also installed between the drive shaft 10 behind the rotating step seal 12 and the wall of the drive shaft through hole on the front end cover 8. The outer ring of the deep groove ball bearing 13 is interference fit with the wall of the drive shaft through hole on the front end cover 8, and the inner ring of the deep groove ball bearing 13 is interference fit with the drive shaft 10; a bearing locating ring 14 and a shaft retaining ring 15 are installed in sequence on the drive shaft 10 behind the inner ring of the deep groove ball bearing 13.

[0026] The interior of the sealed shell 3 is filled with pressure compensation oil, and an oil filling joint 16 and a cable joint 17 are respectively installed on the bottom plate of the sealed end of the rear end cylinder shell 7 of the sealed shell 3; the oil filling joint 16 and the cable joint 17 are fastened to the bottom plate of the sealed end of the rear end cylinder shell 7 by screwing.

[0027] A third static sealing ring 18 is installed between the oil filling joint 16 and the annular contact surface of the bottom plate of the sealing end of the rear end cylinder shell 7; a fourth static sealing ring 19 is installed between the cable joint 17 and the annular contact surface of the bottom plate of the sealing end of the rear end cylinder shell 7.

[0028] The cable connector 17 is sealed and connected to an oil-filled watertight cable 20 through a clamp, and the oil-filled watertight cable 20 is electrically connected to the control end of the brushed motor 1 .

[0029] The grinding head 4 is fixedly connected to the end of the transmission shaft 10 via a clamping limit plate 21 , and the clamping limit plate 21 and the end of the transmission shaft 10 are fastened together by bolts.

[0030] A T-shaped handle 22 is fixedly mounted on the top of the middle cylindrical shell 6 of the sealing housing 3 , and the T-shaped handle 22 is fastened to the middle cylindrical shell 6 by bolts.

[0031] The working principle and working process of the utility model are described below with reference to the accompanying drawings:

[0032] Before the underwater electric grinding tool dives with the underwater robot, pressure compensation oil is filled into the sealed shell 3 through the oil filling joint 16, and the oil-filled watertight cable 20 is connected to the cable joint 17. On the one hand, the oil-filled watertight cable 17 can power the brushed motor 1, and on the other hand, it can also dynamically fill pressure compensation oil into the sealed shell 3 to ensure the pressure balance of the underwater electric grinding tool at different diving depths with the underwater robot, so as to better adapt to different water depth working environments.

[0033] After the oil-filled watertight cable 20 is connected to the cable connector 17, the status of the brush motor 1 can be debugged on the water to ensure that it can work normally. After that, the underwater electric grinding tool will dive with the underwater robot until the underwater robot dives to the target depth, and the underwater robot will conduct a search operation for the underwater target.

[0034] After the underwater robot locks onto the underwater target, if the surface of the underwater target is covered with hard calcification, in order to better observe the underwater target, the underwater robot's robotic arm first grabs the T-shaped handle 22, and moves the underwater electric grinding tool so that the grinding head 4 of the underwater electric grinding tool is close to the underwater target, and then the brush motor 1 is started.

[0035] When the brushed motor 1 is started, its motor shaft first drives the power input shaft of the reducer 2 to rotate. After deceleration, the power output shaft of the reducer 2 rotates, and then drives the transmission shaft 10 to rotate, and finally drives the grinding head 4 to rotate through the transmission shaft 10.

[0036] After the grinding head 4 rotates, the position of the underwater electric grinding tool is continued to be adjusted through the mechanical arm of the underwater robot, and the rotating grinding head 4 is used to grind the calcification covering the surface of the underwater target object, so that the calcification is separated from the surface of the underwater target object, thereby making the underwater target object clearly presented in the field of view of the underwater robot.

[0037] The solutions in the embodiments are not intended to limit the scope of patent protection of the present utility model. Any equivalent implementation or modification that does not deviate from the scope of patent protection of the present utility model is included in the scope of patent of this case.

Claims

1. An underwater electric grinding tool, characterized in that: It includes a brush motor, a reducer, a sealed housing and a grinding head; the motor shaft of the brush motor is coaxially fixedly connected with the power input shaft of the reducer, and the brush motor and the reducer are both fixedly installed inside the sealed housing; the grinding head is located outside the sealed housing, and the grinding head is drivingly connected with the power output shaft of the reducer.

2. An underwater electric grinding tool according to claim 1, characterized in that: The sealing shell includes a front end cover, an intermediate cylinder shell and a rear end cylinder shell; the intermediate cylinder shell is a structure with openings at both ends; the rear end cylinder shell is a structure with openings on one side; the front end cover is fixedly installed at the front end cylinder mouth of the intermediate cylinder shell, the front end cover and the intermediate cylinder shell are fastened together by bolts, and a first static sealing ring is installed between the annular contact surfaces of the front end cover and the intermediate cylinder shell; the rear end cylinder mouth of the intermediate cylinder shell is fixedly connected to the front end cylinder mouth of the rear end cylinder shell, the intermediate cylinder shell and the rear end cylinder shell are fastened together by bolts, and a second static sealing ring is installed between the annular contact surfaces of the intermediate cylinder shell and the rear end cylinder shell.

3. An underwater electric grinding tool according to claim 2, characterized in that: The brushed motor is fixedly installed inside the rear end cylinder shell; the reducer is fixedly installed inside the middle cylinder shell, a transmission shaft is coaxially fixedly sleeved on the power output shaft of the reducer, and the transmission shaft is fixedly connected to the power output shaft of the reducer through a flat key.

4. An underwater electric grinding tool according to claim 3, characterized in that: The transmission shaft seal passes through the front end cover of the sealing housing, and a wear-resistant ring and a rotary step seal are arranged in sequence from the inside to the outside between the transmission shaft and the wall of the transmission shaft passing hole on the front end cover.

5. The underwater electric grinding tool according to claim 4, characterized in that: A deep groove ball bearing is also installed between the transmission shaft behind the rotary step seal and the wall of the transmission shaft through hole on the front end cover. The outer ring of the deep groove ball bearing has an interference fit with the wall of the transmission shaft through hole on the front end cover, and the inner ring of the deep groove ball bearing has an interference fit with the transmission shaft. A bearing locating ring and a shaft retaining ring are installed in sequence on the transmission shaft behind the inner ring of the deep groove ball bearing.

6. The underwater electric grinding tool according to claim 2, characterized in that: The sealing shell is filled with pressure compensation oil, and an oil filling joint and a cable joint are respectively installed on the bottom plate of the sealing end of the rear end cylinder shell of the sealing shell; the oil filling joint and the cable joint are fastened to the bottom plate of the sealing end of the rear end cylinder shell by screwing.

7. An underwater electric grinding tool according to claim 6, characterized in that: A third static sealing ring is installed between the oil-filled joint and the annular contact surface of the bottom plate of the rear end cylinder shell sealing end; a fourth static sealing ring is installed between the cable joint and the annular contact surface of the bottom plate of the rear end cylinder shell sealing end.

8. The underwater electric grinding tool according to claim 6, characterized in that: The cable connector is sealed and connected with an oil-filled watertight cable through a clamp, and the oil-filled watertight cable is electrically connected to the control end of the brushed motor.

9. The underwater electric grinding tool according to claim 1, characterized in that: The grinding head is fixedly connected to the end of the transmission shaft through a clamping limit plate, and the clamping limit plate and the end of the transmission shaft are fastened together by bolts.

10. The underwater electric grinding tool according to claim 2, characterized in that: A T-shaped handle is fixedly installed on the top end of the middle cylinder shell of the sealing shell, and the T-shaped handle is fastened to the middle cylinder shell by bolts.

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