CN212052924U

CN212052924U - Motor-driven crawler excavator

Info

Publication number: CN212052924U
Application number: CN202020608158.8U
Authority: CN
Inventors: 梁敏
Original assignee: Suzhou Keyi Oil Gas Engineering Equipment Service Co ltd
Current assignee: Suzhou Keyi Oil Gas Engineering Equipment Service Co ltd
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2020-12-01
Anticipated expiration: 2030-04-21

Abstract

The utility model relates to a motor-driven crawler excavator; the method is characterized in that: the device comprises a walking chassis, a rotating chassis rotatably arranged on the walking chassis, a large arm device connected to the rotating chassis in a swinging manner, a small arm device connected to the large arm device in a swinging manner, a turnover device supporting the large arm device and a grab bucket device for grabbing materials; the grab bucket device is connected to one end, far away from the large arm device, of the small arm device in a swinging mode; one end of the turnover device is connected with the large arm device in a swinging mode, and the other end of the turnover device is installed on the rotating chassis in a swinging mode. The problems that the moving distance of the grab bucket and the swing angle of the grab bucket cannot be controlled by driving the oil cylinder, the oil leakage is difficult to seriously maintain after the oil cylinder is used for a long time, the maintenance cost is high, the energy-wasting working efficiency is low, the moving range of the grab bucket of the traditional excavator is narrow, and the complex working environment cannot be adapted to due to the existing scheme are solved.

Description

Motor-driven crawler excavator

Technical Field

The utility model relates to a motor drive's crawler-type excavator, concretely relates to motor drive's crawler-type excavator.

Background

Generally, in the prior art, a hydraulic valve is used for reversing to enable an oil cylinder to stretch and retract so as to realize each action. The power source is diesel engine to drive hydraulic pump to rotate, and the oil is supplied to chassis motor and rotary motor. The motor drives the speed reducer to rotate, so that the chassis can walk and turn forwards and backwards, and the rotation of the excavating part is realized. The large arm, the small arm and the grab bucket of the traditional excavator all realize the functions of position determination and overturning by virtue of the telescopic oil cylinder. The traditional excavator mainly realizes each action and function of the excavator through electro-hydraulic control, and the control mainly takes a hydraulic original as a main part, so that after the working time of the excavator is long, the leakage of a hydraulic system is serious and the maintenance cost is high. How to solve this problem becomes crucial.

According to the existing scheme, the oil cylinder is arranged on the large arm to realize swinging of the small arm and the grab bucket along the large arm, and the oil cylinder is arranged on the small arm to realize swinging of the grab bucket along the small arm. Such a solution has the following problems: (1) after the oil cylinder is used for a long time, oil is seriously leaked, the maintenance is difficult, the maintenance cost is high, and the energy waste and the working efficiency are low; (2) the moving distance of the grab bucket and the swinging angle of the grab bucket cannot be controlled by adopting oil cylinder driving; (3) the movement range of the grab bucket of the traditional excavator is narrow, and the grab bucket cannot adapt to a complex working environment.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a motor drive's crawler excavator to solve among the prior art and adopt the displacement of the unable control grab bucket of hydro-cylinder drive and the swing angle of grab bucket, hydro-cylinder to use for a long time the back fluid leak serious maintenance difficulty and maintenance cost higher and the waste energy work efficiency low and the narrow unable operational environment scheduling problem that adapts to complicacy of range of movement of the grab bucket of traditional excavator.

The utility model discloses the technical scheme who adopts as follows:

a motor-driven crawler excavator;

the device comprises a walking chassis, a rotating chassis rotatably arranged on the walking chassis, a large arm device connected to the rotating chassis in a swinging manner, a small arm device connected to the large arm device in a swinging manner, a turnover device supporting the large arm device and a grab bucket device for grabbing materials; the grab bucket device is connected to one end, far away from the large arm device, of the small arm device in a swinging mode; one end of the turnover device is connected with the large arm device in a swinging mode, and the other end of the turnover device is installed on the rotating chassis in a swinging mode.

The further technical scheme is as follows: the walking chassis comprises a walking disc body, a first power device, a walking wheel rotatably arranged on the walking disc body and a walking belt wound on the walking wheel; the first power device drives the travelling wheels to rotate.

The further technical scheme is as follows: the rotating chassis comprises a second power device, a rotating disc body rotationally arranged on the walking chassis, a tooth form arranged around the walking chassis and a rotating wheel arranged at the driving end of the second power device; the tooth form is meshed with the rotating wheel; the second power device drives the rotating wheel to rotate.

The further technical scheme is as follows: the large arm device comprises a third power device, a large arm arranged on the rotary chassis in a swinging mode, a first screw rod arranged on the large arm in a rotating mode and a first moving piece arranged on the first screw rod in a moving mode; the third power device drives the first screw rod to rotate; one end of the first moving piece, which is far away from the first screw rod, is connected with the small arm device.

The further technical scheme is as follows: the small arm device comprises a fourth power device, a small arm arranged on the large arm device in a swinging mode, a second screw rod arranged on the small arm in a rotating mode and a second moving piece arranged on the second screw rod in a moving mode; the fourth power device drives the second screw rod to rotate; one end, far away from the second screw rod, of the second moving piece is connected with the grab bucket device.

The further technical scheme is as follows: the turnover device comprises a fifth power device, a third screw rod arranged on the rotating chassis in a swinging mode and a third moving piece movably arranged on the third screw rod; the fifth power device drives the third screw rod to rotate; and one end of the third moving piece, which is far away from the third screw rod, is connected with the large arm device.

The further technical scheme is as follows: the motor-driven crawler excavator is provided with a power supply generator, an engine for driving the power supply generator, a battery for storing electricity and a control device for controlling the start and stop of the power device; the engine drives the generator through a coupling.

The further technical scheme is as follows: the motor-driven crawler excavator is provided with an operation and control device for controlling the start and stop of the power device; the control equipment is connected with the power device through a bus.

The further technical scheme is as follows: the power device comprises a switch for controlling the power device to start and stop; the switch is arranged on the power device.

The utility model has the advantages as follows: the utility model discloses a motor drive's crawler-type excavator adopts the walking chassis to realize motor drive's crawler-type excavator's removal. The rotation of the grab bucket device around the walking chassis is realized by adopting the rotating chassis. The motor-driven crawler excavator brings the following effects: (1) the motor is adopted for driving, so that the oil leakage is avoided, the maintenance is convenient in the later period, the use cost is saved, the working efficiency is improved, and the energy is saved; (3) the grab bucket device can rotate around the upper end of the walking disc body by rotating the chassis, so that the grab bucket device can grab materials at any position around the motor-driven crawler excavator, and the capability of the motor-driven crawler excavator for coping with complex working environments is improved; (4) the fifth power device controls the vertical movement position of the grab bucket device by controlling the rotation number of the third screw rod and the rotation direction of the third screw rod; (5) the third power device controls the left and right moving position of the grab bucket device by controlling the rotation number of turns of the first screw rod and the rotation direction of the first screw rod; (6) and the fourth power device controls the swing angle of the grab bucket device by controlling the rotation number of turns of the second screw rod and the rotation direction of the second screw rod.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a flow chart of the present invention.

In the figure: 1. a walking chassis; 11. the walking disc body; 12. a first power unit; 13. a traveling wheel; 14. a walking belt; 2. rotating the chassis; 21. rotating the disc body; 22. a second power unit; 23. tooth profile; 24. a rotating wheel; 3. a boom device; 31. a large arm; 32. a third power unit; 33. a first lead screw; 34. a first moving member; 4. a small arm device; 41. a small arm; 42. a fourth power unit; 43. a second lead screw; 44. a second moving member; 5. a turning device; 51. a third screw rod; 52. a fifth power plant; 53. a third moving member; 6. a grab bucket device.

Detailed Description

The following describes a specific embodiment of the present embodiment with reference to the drawings.

Fig. 1 is a schematic structural diagram of the present invention. With reference to fig. 1, the utility model discloses a motor-driven crawler excavator. The direction of X in the figure does the utility model discloses structure schematic's upper end, the direction of Y in the figure does the utility model discloses structure schematic's right-hand member.

The motor-driven crawler excavator comprises a walking chassis 1, a rotating chassis 2 rotatably mounted on the walking chassis 1, a large arm device 3 connected to the rotating chassis 2 in a swinging mode, a small arm device 4 connected to the large arm device 3 in a swinging mode, a turnover device 5 supporting the large arm device 3 and a grab bucket device 6 grabbing materials. The grab bucket device 6 is connected to the end of the small arm device 4 far away from the large arm device 3 in a swinging mode. One end of the turnover device 5 is connected with the large arm device 3 in a swinging mode, and the other end of the turnover device 5 is installed on the rotating chassis 2 in a swinging mode.

The walking chassis 1 comprises a walking disc body 11, a first power device 12, a walking wheel 13 rotatably arranged on the walking disc body 11 and a walking belt 14 wound on the walking wheel 13. First power means 12 drives road wheels 13 in rotation.

The first power unit 12 includes a first motor and a first speed reducer. The drive end of first motor is connected the input of first speed reducer, and walking wheel 13 installs the drive end at first speed reducer. The drive end of the first reducer is the drive end of the first power unit 12.

Options for the first motor include, but are not limited to, a permanent magnet synchronous motor or an asynchronous motor. The choice of first reduction gear includes, but is not limited to, a planetary reduction gear.

Preferably, there are two road wheels 13. The traveling wheels 13 are respectively disposed at the left and right ends of the traveling disc body 11. The first power unit 12 drives the traveling wheels 13 located at the left end of the traveling disc 11. The left end of the walking belt 14 is wound around the walking wheel 13 positioned at the left end of the walking disc 11. The right end of the walking belt 14 is wound around the walking wheels 13 positioned at the right end of the walking disc body 11.

The choice of the first motor model is common knowledge. Those skilled in the art can select the motor type 80ST-M04025, for example, according to the working condition of the device.

The choice of the first reducer model is common knowledge. Those skilled in the art can select the speed reducer according to the working condition of the device, for example, the speed reducer can be selected as PLM 060-L-S2-P0.

The rotating chassis 2 comprises a second power device 22, a rotating disc body 21 rotatably arranged on the walking chassis 1, a tooth form 23 arranged around the walking chassis 1 and a rotating wheel 24 arranged at the driving end of the second power device 22. The tooth 23 engages with a rotating wheel 24. The second power means 22 drives the rotary wheel 24 to rotate.

The second power unit 22 includes a second motor and a second speed reducer. The driving end of the second motor is connected with the input end of the second speed reducer, and the rotating wheel 24 is installed at the driving end of the second speed reducer. The drive end of the second reducer is the drive end of the second power unit 22.

The second electric machine includes, but is not limited to, a permanent magnet synchronous machine or an asynchronous machine. The choice of second reducer includes, but is not limited to, a planetary reducer.

A second power unit 22 is installed at the right end of the rotating disc 21. The rotating tray body 21 is rotatably provided at the upper end of the traveling tray body 11. The tooth form 23 is arranged on the outer surface of the upper end of the walking disc body 11.

The second power device 22 drives the rotary wheel 24 to rotate, and the rotary wheel 24 drives the rotary disc body 21 to rotate. The rotating disc body 21 drives the large arm device 3, the small arm device 4, the turnover device 5 and the grab bucket device 6 to rotate around the upper end of the walking disc body 11.

The tooth form 23 is meshed with the rotating wheel 24, so that the stable power transmission of the second power device 22 can be ensured. The second power means 22 ensures that the rotating disc 21 can be rotated stably.

The choice of the second motor model is common knowledge. Those skilled in the art can select the motor type 80ST-M04025, for example, according to the working condition of the device.

The choice of the second reducer model is common knowledge. Those skilled in the art can select the speed reducer according to the working condition of the device, for example, the speed reducer can be selected as PLM 060-L-S2-P0.

The large arm device 3 comprises a third power device 32, a large arm 31 arranged on the rotating chassis 2 in a swinging mode, a first screw rod 33 arranged on the large arm 31 in a rotating mode and a first moving piece 34 arranged on the first screw rod 33 in a moving mode. The third power device 32 drives the first lead screw 33 to rotate. One end of the first moving part 34 away from the first screw 33 is connected with the small arm device 4.

Preferably, the large arm 31 is L-shaped. The lower end of the large arm 31 is swingably connected to the rotating disk 21. The first lead screw 33 is rotatably provided at the upper end of the large arm 31. The left end of the first screw 33 is connected with the third power device 32. The right end of the first screw 33 is in threaded connection with a first moving part 34. The lower end of the large arm 31 is connected to the rotary disk 21 by a swing hinge.

The third power unit 32 includes a third motor and a third reduction gear. The driving end of the third motor is connected with the input end of the third speed reducer, and the first screw rod 33 is installed at the driving end of the third speed reducer. The drive end of the third reducer is the drive end of the third power unit 32.

Options for the third motor include, but are not limited to, a permanent magnet synchronous motor or an asynchronous motor. The selection of the third reduction gear includes, but is not limited to, a planetary reduction gear.

The third power device 32 is located at the left end of the first lead screw 33. The driving end of the third power device 32 is connected with the left end of the first screw rod 33. The right end of the first screw 33 is in threaded connection with the left end of the first moving part 34. The right end of the first moving member 34 is connected to the lower arm device 4.

The first moving member 34 is moved along the first screw 33 by the rotation of the first screw 33, and the swing of the small arm device 4 and the grapple device 6 along the large arm 31 is completed. The third power device 32 drives the first lead screw 33 to rotate, so that the driving force generated by the first moving part 34 is strong. By controlling the number of rotations of the first lead screw 33, the moving distance of the first moving member 34 can be controlled, and thus the position of the grapple device 6 can be controlled.

The choice of the third motor model is common knowledge. Those skilled in the art can select the motor type 80ST-M04025, for example, according to the working condition of the device.

The choice of the third reducer model is common knowledge. Those skilled in the art can select the speed reducer according to the working condition of the device, for example, the speed reducer can be selected as PLM 060-L-S2-P0.

The turnover device 5 comprises a fifth power device 52, a third screw rod 51 arranged on the rotating chassis 2 in a swinging mode, and a third moving part 53 movably arranged on the third screw rod 51. The fifth power device 52 drives the third lead screw 51 to rotate. One end of the third moving piece 53 far away from the third screw rod 51 is connected with the large-arm device 3.

The turning device 5 is swingably mounted on the upper end of the rotating tray 21. The lower end of the third screw 51 is connected to the rotary disc 21 in a swinging manner. The upper end of the third screw 51 is screwed with the lower end of the third moving member 53. The upper end of the third moving member 53 is swingably connected to the large arm 31. The lower end of the third screw rod 51 is connected with the driving end of a fifth power device 52. The lower end of the third screw rod 51 is connected to the rotary disc body 21 through a movable hinge in a swinging manner.

The fifth power unit 52 includes a fifth motor and a fifth speed reducer. The driving end of the fifth motor is connected with the input end of the fifth speed reducer, and the third screw 51 is installed at the driving end of the fifth speed reducer. The drive end of the fifth speed reducer is the drive end of the fifth power unit 52.

Options for the fifth motor include, but are not limited to, a permanent magnet synchronous motor or an asynchronous motor. The selection of the fifth reducer includes, but is not limited to, a planetary reducer.

The third moving member 53 moves along the third screw 51 by the rotation of the third screw 51, and the swing of the large-arm device 3 along the rotating tray 21 is completed. The fifth power device 52 drives the third screw rod 51 to rotate, so that the pushing force generated by the third moving part 53 is strong. By controlling the number of rotations of the third screw 51, the moving distance of the third moving member 53 can be controlled, and thus the position of the grapple device 6 can be controlled.

The selection of the fifth motor model is common knowledge. Those skilled in the art can select the motor type 80ST-M04025, for example, according to the working condition of the device.

The selection of the fifth reducer model is common knowledge. Those skilled in the art can select the speed reducer according to the working condition of the device, for example, the speed reducer can be selected as PLM 060-L-S2-P0.

The small arm device 4 includes a fourth power device 42, a small arm 41 provided on the large arm device 3 in a swinging manner, a second lead screw 43 rotatably provided on the small arm 41, and a second moving member 44 movably provided on the second lead screw 43. The fourth power device 42 drives the second lead screw 43 to rotate. One end of the second moving member 44, which is far away from the second screw 43, is connected with the grapple device 6.

The upper end of the small arm 41 is connected with the large arm 31 in a swinging way. The grapple bucket assembly 6 is pivotally connected to the lower end of the small arm 41. The right end of the first moving member 34 is connected to the upper end of the small arm 41. The upper end of the second screw 43 is connected with the driving end of the fourth power device 42. The lower end of the second screw 43 is threadedly coupled to the upper end of the second moving member 44. The lower end of the second moving member 44 is connected to the grapple device 6. The upper end of the small arm 41 is connected with the large arm 31 through a movable hinge in a swinging mode. The grab bucket device 6 is connected to the lower end of the small arm 41 through a movable hinge in a swinging mode.

The fourth power unit 42 includes a fourth motor and a fourth reduction gear. The driving end of the fourth motor is connected with the input end of the fourth speed reducer, and the second screw rod 43 is installed at the driving end of the fourth speed reducer. The drive end of the fourth reducer is the drive end of the fourth power unit 42.

Options for the fourth motor include, but are not limited to, a permanent magnet synchronous motor or an asynchronous motor. The selection of the fourth reduction gear includes, but is not limited to, a planetary reduction gear.

The second moving member 44 is moved along the second screw 43 by the rotation of the second screw 43, and the swing of the grapple device 6 along the small arm 41 is completed. The fourth power device 42 drives the second lead screw 43 to rotate, so that the driving force generated by the second moving part 44 is strong. By controlling the number of rotations of the second screw 43, the moving distance of the second moving member 44 can be controlled, so that the grabbing and discharging processes of the grab device 6 can be controlled.

The selection of the fourth motor model is common knowledge. Those skilled in the art can select the motor type 80ST-M04025, for example, according to the working condition of the device.

The selection of the fourth reducer model is common knowledge. Those skilled in the art can select the speed reducer according to the working condition of the device, for example, the speed reducer can be selected as PLM 060-L-S2-P0.

The motor-driven crawler excavator is provided with a power supply generator, an engine for driving the power supply generator, a battery for storing electricity and a control device for controlling the start and stop of the power device; the engine drives the generator through the coupling.

The power supply mode of the motor-driven crawler excavator is divided into two modes, wherein one mode is that the engine drives the generator to provide power for the motor-driven crawler excavator. The other type is that the crawler excavator driven by the motor is connected with a power supply. The power supply is supplied by industrial 380V voltage. The battery can store the surplus electric quantity. Preferably, the battery capacity ranges from 0KW to 200 KW.

When the load of the motor-driven crawler excavator is very small and the voltage of the battery is sufficient, the battery is adopted for supplying power, and the crawler excavator driven by the motor without starting the engine can also work. After the motor-driven crawler excavator works for a long time, when the load of the motor-driven crawler excavator is increased and the voltage of a battery is insufficient, the engine is started or is connected with a power supply to charge, and the motor-driven crawler excavator works normally. When the battery voltage is sufficient, the engine automatically shuts down. The crawler excavator driven by the motor saves energy, realizes energy recycling well, and the generator keeps a power generation state with optimal efficacy.

The control device comprises a central controller and an inverter. The input end of the central controller is connected with the power supply and the output end of the generator. The output end of the central controller is connected with the input end of the inverter. The output end of the inverter is connected with the input end of the power device. The control device can control the power devices to be started or closed together, and the control device can also control the power devices to be started or closed separately.

The choice of the central controller model is common knowledge. The skilled person can choose the device according to its working conditions, for example, a central controller of model VFD004M21A can be chosen.

The selection of the inverter model is common knowledge. Those skilled in the art can select the operation of the device, for example, the type XB3200324 and the inverter.

The motor-driven crawler excavator is provided with an operation and control device for controlling the start and stop of the power device; the control equipment is connected with the power device through a bus.

The control device comprises a control platform and a control handle. The control handle is arranged on the control platform. The output end of the control handle is connected with the input end of the power device through a bus. The start and stop of the power device can be controlled by operating the handle. The control equipment is connected with the power device through a bus. The control equipment can remotely control the motor-driven crawler excavator, and an operator is well protected.

The motor-driven crawler excavator comprises a switch for controlling the power device to start and stop. The switch is arranged on the power device. The start and stop of the power device are controlled by a switch, and the power device is respectively controlled by the switch, so that the accurate control of the motor-driven crawler excavator is realized.

The starting and stopping of the power device are respectively realized through the control device, the control equipment and the switch, and the motor-driven crawler excavator can realize the switching of different control methods during working so as to adapt to different working environments.

Fig. 2 is a flow chart of the present invention. As shown in connection with figures 1 and 2,

when the motor-driven crawler excavator works, the working method of the motor-driven crawler excavator comprises the following steps:

a. the engine drives the generator to supply power for the motor-driven crawler excavator, and the battery stores the power for the motor-driven crawler excavator. The control device controls the power device to start.

b. The first power device 12 drives the travelling wheels 13 to rotate, and the travelling wheels 13 drive the travelling belt 14 to move; the walking belt 14 drives the rotating chassis 2, the large arm device 3, the small arm device 4, the turnover device 5 and the grab bucket device 6 to move.

c. The second power device 22 drives the rotating wheel 24 to rotate, the rotating wheel 24 drives the rotating disc body 21 to rotate, and the rotating disc body 21 drives the large arm device 3, the small arm device 4, the turnover device 5 and the grab bucket device 6 to rotate around the walking chassis 1.

d. The fifth power device 52 drives the third screw rod 51 to rotate, the third moving member 53 moves along the third screw rod 51, and the third moving member 53 pushes the large arm 31 to swing along the rotating disc body 21. The large arm 31 moves the small arm device 4 and the grab bucket device 6.

e. The third power device 32 drives the first screw rod 33 to rotate, the first moving part 34 moves along the first screw rod 33, and the first moving part 34 pushes the small arm 41 to swing along the large arm 31. The small arm 41 moves the grab bucket 6.

f. The fourth power device 42 drives the second screw rod 43 to rotate, the second moving part 44 moves along the second screw rod 43, and the second moving part 44 pushes the grab bucket device 6 to swing along the small arm 41; the grab bucket device 6 grabs the material.

g. And the control device controls the power device to stop working, and the excavator finishes working.

When the load of the motor-driven crawler excavator is very small and the voltage of the battery is sufficient, the engine does not start the motor-driven crawler excavator to start working. When the load of the motor-driven crawler excavator is increased and the voltage of the battery is insufficient, the engine is started or the power supply is connected to start a charging mode, and the motor-driven crawler excavator starts to work.

The walking chassis 1 can realize the movement of the crawler excavator driven by the motor. The first power device 12 is adopted for driving, and stable power output is ensured.

The working environment of the motor-driven crawler excavator is complex, and the grab bucket device 6 needs to grab materials at different positions. The rotation of the grab bucket device 6 around the upper end of the walking disc body 11 can be realized by rotating the chassis 2, so that the grab bucket device 6 can grab materials at any position around the motor-driven crawler excavator. The capability of the motor-driven crawler excavator for dealing with complex working environments is improved.

The second power means 22 can control the angle of the grapple attachment 6 rotating around the upper end of the walking disc 11 and the direction of the grapple attachment 6 rotating around the upper end of the walking disc 11 by controlling the number of rotations of the rotator wheel 24 and the direction of rotation of the rotator wheel 24. Thereby precisely controlling the displacement position of the grapple attachment 6.

When the second power device 22 drives the rotary wheel 24 to rotate clockwise, the rotary wheel 24 drives the rotary disc 21 to rotate clockwise. The rotating disc body 21 drives the large arm device 3, the small arm device 4, the turnover device 5 and the grab bucket device 6 to rotate clockwise around the upper end of the walking disc body 11.

When the second power device 22 drives the rotary wheel 24 to rotate counterclockwise, the rotary wheel 24 drives the rotary disk 21 to rotate counterclockwise. The rotating disc body 21 drives the large arm device 3, the small arm device 4, the turnover device 5 and the grab bucket device 6 to rotate anticlockwise around the upper end of the walking disc body 11.

When the fifth power device 52 drives the third screw 51 to rotate clockwise, the third moving member 53 moves upward along the third screw 51. The third moving member 53 pushes the boom device 3 to swing upward along the rotating tray 21. When the fifth power device 52 drives the third screw 51 to rotate counterclockwise, the third moving member 53 moves downward along the third screw 51. The third moving member 53 pushes the boom device 3 to swing down along the rotating disc 21 for return. The up-and-down movement of the small arm device 4 and the grab bucket device 6 can be realized through the turnover device 5.

The fifth power device 52 controls the rotation number of the third screw rod 51 and the rotation direction of the third screw rod 51, thereby controlling the position of the vertical movement of the grab bucket device 6.

When the third power device 32 drives the first lead screw 33 to rotate clockwise, the first moving member 34 moves rightwards along the first lead screw 33. The first moving member 34 urges the small arm device 4 and the grapple device 6 to swing. When the third power device 32 drives the first lead screw 33 to rotate counterclockwise, the first moving member 34 moves leftward along the first lead screw 33. The first moving member 34 pushes the forearm device 4 and the grapple device 6 to be reset. The left and right movement of the grab bucket device 6 can be realized through the large arm device 3.

The third power device 32 controls the left and right movement position of the grab bucket device 6 by controlling the rotation number of the first lead screw 33 and the rotation direction of the first lead screw 33.

When the fourth power device 42 drives the second lead screw 43 to rotate clockwise, the second moving member 44 moves downward along the second lead screw 43. The second moving member 44 pushes the grapple attachment 6 to swing down the small arm 41 and the grapple attachment 6 grabs the material. When the fourth power device 42 drives the second lead screw 43 to rotate counterclockwise, the second moving member 44 moves upward along the second lead screw 43. The second moving member 44 pushes the grapple attachment 6 to swing upwards along the small arm 41 and the grapple attachment 6 drops the material. The swinging of the grab bucket 6 is achieved by the small arm device 4.

The fourth power device 42 controls the rotation number of the second lead screw 43 and the rotation direction of the second lead screw 43, so as to control the swing angle of the grab bucket device 6.

The motor-driven crawler excavator can realize the action of rotating the grab bucket device 6 around the upper end of the walking disc body 11, the action of moving the grab bucket device 6 up and down, the action of moving the grab bucket device 6 left and right and the action of swinging the grab bucket device 6. The multiple actions of the grab bucket arrangement 6 enable the grab bucket arrangement 6 to grab material at different locations.

The utility model discloses the power device who adopts motor drive to compare for motor and speed reducer and adopts oil cylinder drive, and the motor can avoid the leakage of fluid. The later maintenance is convenient, and the use cost is saved.

In the present embodiment, the first power unit 12 described above includes the first motor and the first speed reducer, but is not limited to this, and may be another power unit within a range capable of functioning as such.

In the present embodiment, the second power unit 22 described above includes the second motor and the second speed reducer, but is not limited to this, and may be another power unit within a range capable of functioning as such.

In the present embodiment, the third power unit 32 described above includes the third motor and the third speed reducer, but is not limited to this, and may be another power unit within a range capable of functioning as such.

In the present embodiment, the fourth power unit 42 described above includes the fourth motor and the fourth speed reducer, but is not limited to this, and may be another power unit within a range capable of functioning as such.

In the present embodiment, the battery capacity range described is 0 to 200KW, but the battery capacity range is not limited thereto, and may be another battery capacity range within a range in which the function can be exerted.

In the present embodiment, the control device described includes a central controller and an inverter, but is not limited to this, and may be another control device within a range capable of functioning as such.

In the present specification, terms such as "L-shaped" are used, and these terms are not exactly "L-shaped" and may be in a state of "substantially L-shaped" within a range in which the functions thereof can be exhibited.

In the present specification, the number of "two" or "plural" is used, but the present invention is not limited thereto, and other numbers may be used as long as the functions are exhibited.

In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is for the purpose of explanation and not limitation of the invention, which is defined in the claims, and any modifications may be made without departing from the basic structure of the invention.

Claims

1. A motor-driven crawler excavator is characterized in that: the device comprises a walking chassis (1), a rotating chassis (2) rotatably mounted on the walking chassis (1), a large arm device (3) connected to the rotating chassis (2) in a swinging manner, a small arm device (4) connected to the large arm device (3) in a swinging manner, a turnover device (5) supporting the large arm device (3) and a grab bucket device (6) for grabbing materials; the grab bucket device (6) is connected to one end, far away from the large arm device (3), of the small arm device (4) in a swinging mode; one end of the turnover device (5) is connected with the large arm device (3) in a swinging mode, and the other end of the turnover device (5) is installed on the rotating chassis (2) in a swinging mode.

2. The motor-driven tracked excavator of claim 1, wherein: the walking chassis (1) comprises a walking disc body (11), a first power device (12), a walking wheel (13) rotatably arranged on the walking disc body (11) and a walking belt (14) wound on the walking wheel (13); the first power device (12) drives the traveling wheels (13) to rotate.

3. The motor-driven tracked excavator of claim 1, wherein: the rotating chassis (2) comprises a second power device (22), a rotating disc body (21) rotatably arranged on the walking chassis (1), a tooth form (23) arranged around the walking chassis (1) and a rotating wheel (24) arranged at the driving end of the second power device (22); the tooth form (23) is meshed with the rotating wheel (24); the second power device (22) drives the rotating wheel (24) to rotate.

4. The motor-driven tracked excavator of claim 1, wherein: the large arm device (3) comprises a third power device (32), a large arm (31) arranged on the rotary chassis (2) in a swinging mode, a first screw rod (33) arranged on the large arm (31) in a rotating mode and a first moving piece (34) movably arranged on the first screw rod (33); the third power device (32) drives the first screw rod (33) to rotate; one end of the first moving part (34) far away from the first screw rod (33) is connected with the small arm device (4).

5. The motor-driven tracked excavator of claim 1, wherein: the small arm device (4) comprises a fourth power device (42), a small arm (41) arranged on the large arm device (3) in a swinging mode, a second screw rod (43) arranged on the small arm (41) in a rotating mode and a second moving piece (44) arranged on the second screw rod (43) in a moving mode; the fourth power device (42) drives the second screw rod (43) to rotate; one end of the second moving part (44) far away from the second screw rod (43) is connected with the grab bucket device (6).

6. The motor-driven tracked excavator of claim 1, wherein: the turnover device (5) comprises a fifth power device (52), a third screw rod (51) arranged on the rotating chassis (2) in a swinging mode and a third moving piece (53) arranged on the third screw rod (51) in a moving mode; the fifth power device (52) drives the third screw rod (51) to rotate; one end of the third moving piece (53) far away from the third screw rod (51) is connected with the large-arm device (3).

7. The motor-driven tracked excavator of claim 1, wherein: the motor-driven crawler excavator is provided with a power supply generator, an engine for driving the power supply generator, a battery for storing electricity and a control device for controlling the start and stop of the power device; the engine drives the generator through a coupling.

8. The motor-driven tracked excavator of claim 1, wherein: the motor-driven crawler excavator is provided with an operation and control device for controlling the start and stop of the power device; the control equipment is connected with the power device through a bus.

9. The motor-driven tracked excavator of claim 1, wherein: the power device comprises a switch for controlling the power device to start and stop; the switch is arranged on the power device.