High-foot excavator capable of ascending and descending in shallow water environment

Abstract

The invention discloses a high-foot excavator capable of ascending and descending in a shallow water environment, and belongs to the technical field of excavators. A high-foot excavator capable of ascending and descending in a shallow water environment comprises an excavator body, the excavator body comprises a lower vehicle body and an upper vehicle body, a telescopic pipe assembly is arranged between the lower vehicle body and the upper vehicle body, a base is arranged at the lower vehicle body, an inner cavity is formed in the base, and an ascending and descending assembly used for driving the upper vehicle body to ascend and descend is arranged in the inner cavity; a protection assembly used for floating on the water surface is arranged on the base, balance assemblies are hinged between the four corners of the protection assembly and the corresponding positions of the telescopic pipe assemblies, and the balance assemblies are used for supporting the telescopic pipe assemblies. Compared with the prior art, the risk that the gravity center of the excavator is high due to the fact that the overall height of equipment is increased during operation in the wading area, and the excavator is prone to overturning due to water flow impact or ground collapse is reduced, and flexibility and safety are both considered.

Description

Technical Field

[0001] The present invention relates to the technical field of excavators, in particular to a high-legged excavator capable of being raised and lowered in a shallow water environment. Background Art

[0002] Today's construction machinery has a wide range of applications, especially crawler excavators. Excavators currently on the market all operate on land or in water with a depth not exceeding that of the platform.

[0003] When working in flooded areas, a heightening tube is usually added between the lower and upper bodies of the excavator. Although raising the upper body allows operations in flooded areas, the increased height of the equipment causes the center of gravity of the excavator to be higher, making it prone to overturning due to water impact or ground collapse. Summary of the Invention

[0004] The present invention provides a high-legged excavator that can be raised and lowered in a shallow water environment, which can overcome certain defects of the prior art.

[0005] According to the present invention, a high-legged excavator capable of being raised and lowered in a shallow water environment comprises an excavator body, the excavator body comprising a lower body and an upper body, a telescopic tube assembly being provided between the lower body and the upper body, a base being provided at the lower body, an inner cavity being provided at the base, and a lifting assembly for driving the upper body to be raised and lowered being provided in the inner cavity;

[0006] A protective component for floating on the water is provided at the base. Balance components are hinged between the four corners of the protective component and the corresponding positions of the telescopic tube component. The balance components are used to support the telescopic tube assembly.

[0007] The present invention discloses a high-legged excavator that can be raised and lowered in a shallow water environment. When it needs to be used for operations in a wading area, the operator controls the operation of the lifting component to raise the upper body at the sliding tube to the required height. When the sliding tube rises, the second waterproof cloth and the protective component are also raised. The rise of the protective component allows the first waterproof cloth to form a protection between the raised lower body and the upper body, thereby preventing water or debris from entering the base during wading operations and affecting the normal operation of the equipment.

[0008] After the excavator has completely entered the wading area, Figure 6 In the state shown, when the water level is above the base, due to the arrangement of the first waterproof cloth, the second waterproof cloth and the airbag, the airbag floats on the water surface under the action of the water buoyancy. At this time, the airbag provides an upward buoyancy to the balance component, so that the balance component supports the sliding tube. Compared with the existing technology, when operating in wading areas, the center of gravity of the excavator is higher due to the increase in the overall height of the equipment, which reduces the risk of overturning due to water impact or ground collapse, and takes into account both flexibility and safety.

[0009] Preferably, a mounting groove is formed on the top wall of the base along the periphery of the inner cavity, and the protective component includes a floating plate covering the mounting groove, an airbag is provided on the bottom wall of the floating plate, and a first waterproof cloth is provided between the bottom wall of the airbag and the bottom wall of the mounting groove. The first waterproof cloth is folded and arranged in the mounting groove, wherein the length of the first waterproof cloth is longer than the height of the raised upper body.

[0010] Through the above structure, when wading operations are not required, the first waterproof cloth can be stored in the installation groove. During wading operations, the airbag can drive the first waterproof cloth to be released when it comes into contact with the water surface, thereby preventing water from flowing into the inner cavity and improving the service life of the equipment.

[0011] Preferably, an outer wall of the base is formed with an inclined surface arranged to be inclined downward, and a plurality of water seepage holes are formed at the bottom wall of the installation groove.

[0012] With the above structure, water entering the installation groove can be drained out in time to avoid water accumulation.

[0013] Preferably, the telescopic tube assembly includes a fixed tube arranged at the lower body, the fixed tube is telescopically provided with a sliding tube, the balancing assembly includes a sleeve rod with one end hinged to the outer wall of the sliding tube, a sliding rod is slidably provided at one end of the sleeve rod, the sliding rod is hinged to the top wall of the floating board, through grooves are formed on both side walls of the sleeve rod, and a locking assembly is provided at the sleeve rod, which is used to limit the sliding rod.

[0014] The balancing component achieves multi-angle adaptive support through the sliding tube and sleeve rod, sliding rod and floating plate at the hinge point, dispersing the lateral force generated by water impact, ground collapse or equipment tilt, and reducing the risk of overturning.

[0015] By setting the locking component, the length between the sleeve rod and the slide rod can be controlled at any time to adapt to different support requirements.

[0016] Preferably, the locking assembly includes an articulated seat provided at the side walls on both sides of the sleeve rod and a sliding member slidably provided at the top wall of the sleeve rod, the articulated seat is rotatably provided with a rotating shaft along the thickness direction of the sleeve rod, the sliding rod and the through groove are provided with ratchet sections at the corresponding positions, and a pawl cooperating with the ratchet section is provided at the rotating shaft, and an extension piece is formed at one end of the rotating shaft passing through the articulated seat, wherein the extension piece is arranged perpendicular to the pawl, and an inwardly recessed rotating groove is formed at the corresponding sides of the sliding member and the extension piece, and the extension piece is rotatably provided in the rotating groove, and a cylinder is provided at the sleeve rod, and the cylinder is used to drive the sliding member to move along the length direction of the sleeve rod to realize unlocking or locking of the driving locking assembly.

[0017] The sliding member slides along the top wall of the sleeve rod, and its concave rotation groove cooperates with the extension of the rotating shaft. When the cylinder drives the sliding member to move, the rotation groove squeezes the extension, driving the rotating shaft to rotate, causing the pawl to disengage the tooth groove of the ratchet segment, achieving unlocking.

[0018] It can be understood that the cylinder drives the sliding parts to move through air pressure, and the operator can remotely control the locking or unlocking in the cab to adapt to the rapid adjustment needs in complex working conditions such as deep water and dangerous areas.

[0019] Specifically, when the terrain of the wading area is uneven and the water level is different, the operator can release the limit on the sliding rod by controlling the cylinder, so that the floating plate and the airbag adapt to the water level and then drive the cylinder to limit the sliding rod.

[0020] It can be understood that the ratchet section of the sliding rod cooperates with the pawl on the rotating shaft to form a one-way meshing structure, so that when the height of the equipment is raised, it can be extended in one direction to avoid pulling and damaging the balance component.

[0021] Preferably, a circular hole is provided on the sliding member, a connecting member is slidably provided in the circular hole, the connecting member has a mounting block provided at the telescopic end of the cylinder, a fixing rod slidingly engaged with the circular hole is provided on the mounting block, and a stop block is provided at one end of the fixing rod passing through the circular hole.

[0022] The circular hole opened at the sliding part provides a sliding track for the connecting part, ensuring that the connecting part moves stably along the length direction of the sleeve rod, that is, the driving direction of the cylinder, to avoid deviation or jamming.

[0023] The stopper at the end of the fixed rod limits the sliding stroke of the connecting piece, preventing it from falling out of the round hole, thereby ensuring stable sliding.

[0024] Preferably, a push rod is provided at the mounting block, and a positioning groove for the push rod to be inserted is provided on the corresponding side of the sliding member and the mounting block, and a spring is sleeved on the fixed rod, and the spring is provided between the mounting block and the sliding member, wherein the length of the positioning groove is longer than the length of the push rod.

[0025] The insertion of the ejector rod into the positioning slot ensures that the slide always remains coaxial with the mounting block during movement, avoiding deviation or jamming and improving the accuracy of the unlocking / locking operation.

[0026] The length of the positioning groove is longer than the ejector rod, allowing the sliding part to still have a small travel space after the ejector rod is fully inserted, accommodating the compression and reset of the spring and providing space for the unidirectional release of the pawl.

[0027] Preferably, a top plate is provided on the outer wall of the sliding tube, and a second waterproof cloth is provided between the top plate and the floating plate.

[0028] The second waterproof cloth connects the top plate and the floating plate, and cooperates with the setting of the first waterproof cloth to form a closed waterproof area inside the inner cavity to prevent water, mud or debris from entering the inner cavity.

[0029] Preferably, the lifting assembly is arranged between the inner cavity and the top plate, and the lifting assembly includes two scissors struts arranged in the inner cavity, and the two scissors struts are symmetrically arranged along the fixed tube. The scissors struts have a fixed end and a movable end, and the movable end is arranged on the side close to the fixed tube. The inner cavity is provided with a movable end arranged at the telescopic end of the hydraulic cylinder, and the scissors struts are used to drive the top plate to lift.

[0030] Two scissor braces are symmetrically arranged in the inner cavity along the fixed tube to ensure uniform force during the lifting process and avoid structural deformation or jamming caused by unbalanced loading.

[0031] The hydraulic cylinder is built into the inner cavity, and the scissor support is folded and retracted during the lifting process, reducing the storage volume of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the overall structure of a high-legged excavator that can be raised and lowered in a shallow water environment.

[0033] Figure 2 The diagram is a side cross-sectional structural diagram of a protective component of a high-legged excavator that can be raised and lowered in a shallow water environment.

[0034] Figure 3 for Figure 2 A partial enlarged schematic diagram of point A in the middle.

[0035] Figure 4 This is a schematic diagram of the balance component structure of a high-legged excavator that can be raised and lowered in a shallow water environment.

[0036] Figure 5 This is a schematic diagram of the cross-sectional structure of the balance component of a high-legged excavator that can be raised and lowered in a shallow water environment.

[0037] Figure 6 A schematic diagram of the support of a balance assembly for a high-legged excavator that can be raised and lowered in a shallow water environment.

[0038] Figure 7 This is a schematic diagram of the cross-sectional structure of the lifting component of a high-legged excavator that can be raised and lowered in a shallow water environment.

[0039] 100, excavator body; 110, lower body; 120, telescopic tube assembly; 130, upper body; 140, base; 150, protective assembly; 160, balance assembly; 210, inner cavity; 220, lifting assembly; 310, mounting groove; 320, floating plate; 321, airbag; 330, first waterproof cloth; 340, inclined surface; 410, sleeve rod; 420, slide rod; 430, through groove; 440, ratchet segment; 450, Articulated seat; 460, rotating shaft; 461, pawl; 462, extension piece; 470, sliding piece; 471, rotating groove; 480, connecting piece; 490, cylinder; 510, mounting block; 520, fixing rod; 530, stop block; 540, push rod; 550, spring; 560, positioning groove; 610, top plate; 620, second waterproof cloth; 710, fixing tube; 720, sliding tube; 730, hydraulic cylinder; 740, scissors support. DETAILED DESCRIPTION

[0040] In order to further understand the content of the present invention, the present invention is described in detail with reference to the embodiments. It should be understood that the embodiments are merely for explanation of the present invention and are not intended to limit the present invention.

[0041] Example 1

[0042] See also Figure 1-Figure 7 This embodiment provides a stilt excavator that can be raised and lowered in a shallow water environment. The stilt excavator includes an excavator body 100. The excavator body 100 includes a lower body 110 and an upper body 130. A telescopic tube assembly 120 is provided between the lower body 110 and the upper body 130. The lower body 110 is provided with a base 140. The base 140 is provided with an inner cavity 210. A lifting assembly 220 for driving the upper body 130 to rise and fall is provided in the inner cavity 210.

[0043] A protective assembly 150 for floating on the water surface is provided at the base 140 . Balance assemblies 160 are hinged between the four corners of the protective assembly 150 and the corresponding positions of the telescopic tube assembly 120 . The balance assembly 160 is used to support the telescopic tube assembly 120 .

[0044] The present invention discloses a high-legged excavator that can be raised and lowered in a shallow water environment. When it needs to be used in a wading area, the operator controls the lifting component 220 to operate so that the upper body 130 at the sliding tube 720 rises to the required height. When the sliding tube 720 rises, the second waterproof cloth 620 and the protective component 150 are also raised. The floating plate 320 at the protective component 150 rises so that the first waterproof cloth 330 forms a protection between the raised lower body 110 and the upper body 130, thereby preventing water or debris from entering the base 140 and affecting the normal operation of the equipment during wading operations.

[0045] After the excavator has completely entered the wading area, Figure 6In the state shown, when the water level is above the base 140, due to the arrangement of the first waterproof cloth 330, the second waterproof cloth 620 and the airbag 321, the airbag 321 floats on the water surface under the action of the water buoyancy. At this time, the airbag 321 provides an upward buoyancy to the balance component 160, so that the balance component 160 supports the sliding tube 720. Compared with the prior art, this reduces the risk of the excavator's center of gravity being higher due to the increase in the overall height of the equipment when operating in wading areas, and is prone to overturning due to water impact or ground collapse, thereby taking into account both flexibility and safety.

[0046] In this embodiment, a mounting groove 310 is formed on the top wall of the base 140 and is arranged along the periphery of the inner cavity 210. The protective component 150 includes a floating plate 320 covering the mounting groove 310. An airbag 321 is provided at the bottom wall of the floating plate 320. A first waterproof cloth 330 is provided between the bottom wall of the airbag 321 and the bottom wall of the mounting groove 310. The first waterproof cloth 330 is folded and arranged in the mounting groove 310, wherein the length of the first waterproof cloth 330 is longer than the height of the raised upper body 130.

[0047] Through the above structure, when wading operations are not required, the first waterproof cloth 330 can be stored in the installation groove 310. During wading operations, the airbag 321 can drive the first waterproof cloth 330 to be released when it comes into contact with the water surface, thereby preventing water from flowing into the inner cavity 210 and improving the service life of the equipment.

[0048] In this embodiment, a downwardly inclined slope 340 is formed on the outer wall of the base 140 , and a plurality of water seepage holes are formed on the bottom wall of the installation groove 310 .

[0049] With the above structure, when water enters the installation groove 310 , it can be drained away in time to avoid water accumulation.

[0050] In this embodiment, the telescopic tube assembly 120 includes a fixed tube 710 provided at the lower body 110, and the fixed tube 710 is telescopically provided with a sliding tube 720. The balancing assembly 160 includes a sleeve rod 410 with one end hinged to the outer wall of the sliding tube 720, and a sliding rod 420 is slidably provided at one end of the sleeve rod 410. The sliding rod 420 is hinged to the top wall of the floating plate 320, and through grooves 430 are formed on both side walls of the sleeve rod 410. A locking assembly is provided at the sleeve rod 410, and the locking assembly is used to limit the sliding rod 420.

[0051] The balancing assembly 160 achieves multi-angle adaptive support through the hinge point sliding tube 720 and the sleeve rod 410, the sliding rod 420 and the floating plate 320, dispersing the lateral force generated by water impact, ground collapse or equipment tilt, and reducing the risk of overturning.

[0052] By setting the locking assembly, the length between the sleeve rod 410 and the slide rod 420 can be controlled at any time to adapt to different support requirements.

[0053] The cam 460 is provided with a plurality of springs 462 which are adapted to engage with the cam 461 and engage with the springs 462. The cam 460 is provided with a plurality of springs 462 which are adapted to engage with the cam 461 and engage with the springs 462. The cam 460 is provided with a plurality of springs 462 which are adapted to engage with the cam 461 and engage with the springs 462. The cam 460 is provided with a plurality of springs 462 which are adapted to engage with the cam 461 and engage with the springs 462.

[0054] The sliding member 470 slides along the top wall of the sleeve rod 410, and its concave rotation groove 471 cooperates with the extension 462 of the rotating shaft 460. When the cylinder 490 drives the sliding member 470 to move, the rotation groove 471 squeezes the extension 462, driving the rotating shaft 460 to rotate, causing the pawl 461 to disengage the tooth groove of the ratchet section 440, thereby unlocking the door.

[0055] It is understandable that the cylinder 490 drives the sliding member 470 to move through air pressure, and the operator can remotely control the locking or unlocking in the cab to meet the needs of rapid adjustment in complex working conditions such as deep water areas and dangerous areas.

[0056] Specifically, when the terrain of the wading area is uneven and the water level is different, the operator releases the limit on the slide rod 420 by controlling the cylinder 490, so that the floating plate 320 and the airbag 321 adapt to the water level and are then driven by the cylinder 490 to limit the slide rod 420.

[0057] It is understandable that the ratchet section 440 of the slide bar 420 cooperates with the pawl 461 on the rotating shaft 460 to form a one-way meshing structure, so that when the height of the equipment is raised, it can be extended in one direction to avoid pulling and damaging the balance component 160.

[0058] In this embodiment, a circular hole is provided at the sliding member 470, and a connecting member 480 is slidably provided in the circular hole. The connecting member 480 has a mounting block 510 provided at the telescopic end of the cylinder 490. The mounting block 510 is provided with a fixing rod 520 that slides with the circular hole, and a stop block 530 is provided at one end of the fixing rod 520 that passes through the circular hole.

[0059] The circular hole formed in the sliding member 470 provides a sliding track for the connecting member 480 , thereby ensuring that the connecting member 480 moves stably along the length direction of the sleeve rod 410 , that is, the driving direction of the cylinder 490 , to avoid deviation or jamming.

[0060] The stopper 530 at the end of the fixing rod 520 limits the sliding stroke of the connecting member 480 to prevent it from falling out of the circular hole, thereby ensuring stable sliding.

[0061] In this embodiment, a push rod 540 is provided at the mounting block 510, and a positioning groove 560 for the push rod 540 to be inserted is provided on the side corresponding to the sliding member 470 and the mounting block 510. A spring 550 is sleeved on the fixing rod 520, and the spring 550 is provided between the mounting block 510 and the sliding member 470, wherein the length of the positioning groove 560 is longer than the length of the push rod 540.

[0062] The insertion of the push rod 540 into the positioning groove 560 ensures that the sliding member 470 always remains coaxial with the mounting block 510 during movement, avoiding deviation or jamming, and improving the accuracy of the unlocking / locking operation.

[0063] The positioning slot 560 is longer than the push rod 540 , allowing the sliding member 470 to still have a small travel space after the push rod 540 is fully inserted, accommodating the compression and reset of the spring 550 and providing space for the unidirectional release of the pawl 461 .

[0064] In this embodiment, a top plate 610 is provided on the outer wall of the sliding tube 720 , and a second waterproof cloth 620 is provided between the top plate 610 and the floating plate 320 .

[0065] The second waterproof cloth 620 connects the top plate 610 and the floating plate 320 , and cooperates with the first waterproof cloth 330 to form a closed waterproof area inside the inner cavity 210 to prevent water, mud, sand or debris from entering the inner cavity 210 .

[0066] In this embodiment, the lifting assembly 220 is arranged between the inner cavity 210 and the top plate 610. The lifting assembly 220 includes two scissors struts 740 arranged in the inner cavity 210. The two scissors struts 740 are symmetrically arranged along the fixed tube 710. The scissors struts 740 have a fixed end and a movable end. The movable end is arranged on the side close to the fixed tube 710 and is provided at the inner cavity 210. The movable end is arranged at the telescopic end of the hydraulic cylinder 740. The scissors struts 730 are used to drive the top plate 610 to rise and fall.

[0067] Two scissor struts 740 are symmetrically arranged in the inner cavity 210 along the fixed tube 710 to ensure uniform force during the lifting process and avoid structural deformation or jamming caused by unbalanced loads.

[0068] The hydraulic cylinder 730 is built into the inner cavity 210, and the scissor support 740 is folded and retracted during the lifting process, thereby reducing the storage volume of the equipment.

[0069] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application based on one or several embodiments provided in the present application to obtain other embodiments, and these embodiments do not exceed the scope of protection of the present application.

[0070] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The embodiments shown in the embodiments are only part of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the above and, without departing from the purpose of the present invention, designs a structure and embodiment similar to the technical solution without creatively designing, they shall fall within the scope of protection of the present invention.

Claims

1. A high-legged excavator that can be raised and lowered in shallow water, characterized by: The excavator comprises an excavator body (100), the excavator body (100) comprising a lower body (110) and an upper body (130), a telescopic tube assembly (120) being provided between the lower body (110) and the upper body (130), a base (140) being provided at the lower body (110), an inner cavity (210) being provided at the base (140), and a lifting assembly (220) being provided in the inner cavity (210) for driving the upper body (130) to rise and fall; A protective assembly (150) for floating on the water surface is provided at the base (140), and balancing assemblies (160) are hinged between the four corners of the protective assembly (150) and the corresponding positions of the telescopic tube assembly (120), and the balancing assembly (160) is used to support the telescopic tube assembly (120).

2. The stilt excavator capable of being raised and lowered in shallow water according to claim 1, characterized in that: A mounting groove (310) is formed on the top wall of the base (140) and is arranged along the periphery of the inner cavity (210). The protective assembly (150) includes a floating plate (320) covering the mounting groove (310). An airbag (321) is provided on the bottom wall of the floating plate (320). A first waterproof cloth (330) is provided between the bottom wall of the airbag (321) and the bottom wall of the mounting groove (310). The length of the first waterproof cloth (330) is longer than the height of the upper vehicle body (130).

3. The stilt excavator capable of lifting in shallow water according to claim 2, characterized in that: An outer wall of the base (140) is formed with an inclined surface (340) arranged to be inclined downward, and a plurality of water seepage holes are formed at the bottom wall of the installation groove (310).

4. The stilt excavator capable of lifting in shallow water according to claim 2, characterized in that: The telescopic tube assembly (120) includes a fixed tube (710) provided at the lower vehicle body (110), the fixed tube (710) is telescopically provided with a sliding tube (720), the balancing assembly (160) includes a sleeve rod (410) one end of which is hinged to the outer wall of the sliding tube (720), a sliding rod (420) is slidably provided at one end of the sleeve rod (410), the sliding rod (420) is hinged to the top wall of the floating board (320), through grooves (430) are formed on both side walls of the sleeve rod (410), and a locking assembly is provided on the sleeve rod (410), which is used to limit the sliding rod (420).

5. The stilt excavator capable of lifting in shallow water according to claim 4, characterized in that: The locking assembly includes a hinge seat (450) provided at the side walls of both sides of the sleeve rod (410) and a sliding member (470) slidably provided at the top wall of the sleeve rod (410). The hinge seat (450) is rotatably provided with a rotating shaft (460) along the thickness direction of the sleeve rod (410). The sliding rod (420) and the through groove (430) are both provided with ratchet sections (440) at the corresponding positions. A ratchet pawl (461) cooperating with the ratchet section (440) is provided at the rotating shaft (460). The rotating shaft (460) passes through the hinge seat (450). An extension piece (462) is formed at one end, wherein the extension piece (462) is vertically arranged with the pawl (461); an inwardly recessed rotation groove (471) is formed at the corresponding side of the sliding piece (470) and the extension piece (462); the extension piece (462) is rotatably arranged in the rotation groove (471); a cylinder (490) is provided at the sleeve rod (410); the cylinder (490) is used to drive the sliding piece (470) to move along the length direction of the sleeve rod (410) to realize unlocking or locking of the driving locking assembly.

6. The stilt excavator capable of being raised and lowered in shallow water according to claim 5, characterized in that: A circular hole is provided at the sliding member (470), a connecting member (480) is slidably provided in the circular hole, the connecting member (480) has a mounting block (510) provided at the telescopic end of the cylinder (490), a fixing rod (520) is provided at the mounting block (510) and is slidably engaged with the circular hole, and a stopper (530) is provided at one end of the fixing rod (520) that passes through the circular hole.

7. The high-legged excavator capable of being raised and lowered in shallow water according to claim 6, characterized in that: A push rod (540) is provided at the mounting block (510), a positioning groove (560) for the push rod (540) to be inserted is provided on one side of the sliding member (470) and the mounting block (510), a spring (550) is sleeved on the fixing rod (520), and the spring (550) is provided between the mounting block (510) and the sliding member (470), wherein the length of the positioning groove (560) is longer than the length of the push rod (540).

8. The high-legged excavator capable of being raised and lowered in shallow water according to claim 4, characterized in that: A top plate (610) is provided on the outer wall of the sliding tube (720), and a second waterproof cloth (620) is provided between the top plate (610) and the floating plate (320).

9. The stilt excavator capable of being raised and lowered in shallow water according to claim 8, characterized in that: The lifting assembly (220) is arranged between the inner cavity (210) and the top plate (610). The lifting assembly (220) includes two hydraulic cylinders (730) arranged in the inner cavity (210). The two hydraulic cylinders (730) are symmetrically arranged along the fixed pipe (710). The hydraulic cylinder (730) has a fixed end and a movable end. The movable end is arranged on a side close to the fixed pipe (710). A scissors strut (740) is provided at the inner cavity (210). The movable end is arranged at the telescopic end of the scissors strut (740). The scissors strut (740) is used to drive the top plate (610) to rise and fall.

Images