CN212294791U

CN212294791U - Power arm slewing device and excavator

Info

Publication number: CN212294791U
Application number: CN202021508975.2U
Authority: CN
Inventors: 赵国栋; 郑春红
Original assignee: Sany Heavy Machinery Ltd
Current assignee: Sany Heavy Machinery Ltd
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2021-01-05
Anticipated expiration: 2030-07-27

Abstract

The utility model provides a power arm slewing device and an excavator, relating to the technical field of excavating equipment, comprising a driving arm and a driven arm which are connected, wherein one end of the driving arm is connected with a slewing motor, and one end part of the driven arm is provided with a driven rotating component; the rotary motor is connected with a driving shaft and is connected with a driven rotating assembly through the driving shaft so that the driving arm is connected with the driven arm; when the rotary motor works, the driven rotating assembly is driven to rotate through the driving shaft, so that the driven arm rotates relative to the driving arm. The excavator comprises the power arm slewing device. The drive shaft of the rotary motor drives the driven arm to rotate through the driven rotating assembly, so that the driven arm rotates relative to the driving arm, the bucket arranged at the end part of the driven arm rotates along the central shaft of the driving arm, the bucket realizes angle adjustment in the transverse direction, and the rotary bucket is very convenient for construction conditions requiring frequent adjustment of the angle of the bucket in the transverse direction.

Description

Power arm slewing device and excavator

Technical Field

The utility model relates to an excavating equipment technical field especially relates to a power arm slewer and excavator.

Background

The excavator is a common tool for daily construction, and can adapt to a plurality of severe construction environments. The excavator is mainly used for carrying and transferring materials and is inseparable from a bucket of the excavator and a bucket rod connected with the bucket. At present, the dipper of most excavators is the structure of integral type, and the dipper of a small number of excavators can drive the swing that the vertical face direction was realized to the scraper bowl, but the dipper can't drive the scraper bowl and realize the ascending swing of transverse direction, needs the angle of adjustment excavator fuselage, just enables the bucket and realizes the ascending swing of transverse direction, to some construction circumstances that need frequently adjust the scraper bowl angle in transverse direction, just seem very inconvenient.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a power arm swiveling device and an excavator to overcome the disadvantages of the prior art.

The utility model provides a following technical scheme: a power arm slewing device comprises a driving arm and a driven arm which are connected, wherein one end part of the driving arm is detachably connected with a slewing motor, and one end part of the driven arm is provided with a driven rotating assembly; the rotary motor is connected with a driving shaft and is connected with the driven rotating assembly through the driving shaft; when the rotary motor works, the rotary motor drives the driven rotating assembly to rotate through the driving shaft, so that the driven arm rotates relative to the driving arm.

Further, when the swing motor operates, a plane formed by a path along which the driven arm rotates relative to the driving arm is perpendicular to a central axis of the driving arm.

Furthermore, the driven rotating assembly comprises a sleeve and a bearing, the bearing is arranged in the sleeve, the sleeve is connected with the driving shaft through the bearing, a driven counter bore matched with the driving shaft is arranged at the end part, close to the driving arm, of the driven arm, and the driving shaft is connected with the driven counter bore in a matched mode; when the rotary motor works, the rotary motor applies acting force to the driven counter bore through the driving shaft so as to drive the driven arm to rotate.

Furthermore, the rotary motor is provided with a bearing part and is connected with the sleeve through the bearing part.

In a second aspect, the present invention further provides an excavator, where the excavator includes the above power arm slewing device, the power arm slewing device includes a driving arm and a driven arm that are connected, a slewing motor is detachably connected to one end of the driving arm, and a driven rotating assembly is arranged at one end of the driven arm; the rotary motor is connected with a driving shaft and is connected with the driven rotating assembly through the driving shaft; when the rotary motor works, the rotary motor drives the driven rotating assembly to rotate through the driving shaft, so that the driven arm rotates relative to the driving arm.

Furthermore, the middle part of the driving arm is hinged to the fixing arm, the end, far away from the driven arm, of the driving arm is connected with a first driving cylinder, and the first driving cylinder drives the driving arm to enable the driving arm to rotate relative to the fixing arm along the hinged position of the fixing arm.

Further, the driven arm is close to the tip of initiative arm is provided with first installation department, the driven arm is kept away from the tip of initiative arm is provided with the second installation department, first installation department with be provided with the support column between the second installation department, through first installation department with actuating mechanism is installed to the support column, through the articulated scraper bowl that is connected with of second installation department, actuating mechanism's both ends are articulated respectively to be connected first installation department reaches the scraper bowl drives the scraper bowl along the scraper bowl with the articulated department of second installation department rotates.

Further, the driving mechanism comprises a second driving cylinder, a supporting frame and a driven piece, the second driving cylinder is connected with one end of the driven piece through the supporting frame, and the other end of the driven piece is hinged with the bucket; the second driving cylinder drives the bucket through the driven piece, so that the bucket rotates along the hinged position of the second installation part.

Furthermore, the supporting frame comprises a first supporting rod, a second supporting rod and a connecting rod, one end of the first supporting rod and one end of the second supporting rod are respectively hinged with two ends of the supporting column, the other ends of the first supporting rod and the second supporting rod are hinged with two ends of the connecting rod, and the other ends of the first supporting rod and the second supporting rod are fixedly connected with the end, far away from the bucket, of the driven piece; the second drives the articulated connection of actuating cylinder the connecting rod to the drive the connecting rod along the center pin of support column rotates, thereby makes the connecting rod pass through the follower drives the scraper bowl along the scraper bowl with the articulated department of second installation department rotates.

Furthermore, the excavator further comprises a first controller and a second controller, wherein the first controller is connected to the rotary motor and is used for controlling the rotary motor to drive the driven arm to rotate relative to the driving arm; the second controller is connected with the first driving cylinder and used for controlling the first driving cylinder to drive the driving arm to rotate along the hinged position of the fixing arm, so that the bucket is driven to rotate.

The embodiment of the utility model has the following advantage: the drive shaft of the rotary motor of the driving arm is connected with the driven arm through the driven rotating assembly, the rotary motor drives the drive shaft to rotate, the drive shaft drives the driven arm to rotate through the driven rotating assembly, the driven arm rotates relative to the driving arm, the bucket arranged at the end part of the driven arm rotates along the central shaft of the driving arm, the bucket realizes angle adjustment in the transverse direction, and the construction condition that the angle of the bucket in the transverse direction needs to be frequently adjusted is very convenient.

In order to make the aforementioned and other objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic diagram of an active arm of a power arm slewing device;

FIG. 2 is a schematic diagram showing the construction of a slave arm in a power arm swing;

FIG. 3 shows a schematic of the structure in a power arm swing;

fig. 4 shows a schematic structural diagram of an excavator.

Description of the main element symbols:

1-an active arm; 2-a driven arm; 31-a rotary motor; 32-a sleeve; 33-a load-bearing member; 34-a drive shaft; 4-a bucket; 5-a first driving cylinder; 51-a first sleeve; 52-a first telescoping rod; 6-a support frame; 61-a first strut; 62-a second strut; 63-connecting rods; 7-a follower; 8-a support column; 9-a second driving cylinder; 91-a second sleeve; 92-a second telescopic rod; 10-a fixed arm; 11-a main drive cylinder; 111-a main bushing; 112-main telescopic rod; 13-trachea; 14-a first mounting portion; 15-second mounting part.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1

As shown in fig. 3, the utility model provides a power arm slewer can be used to the excavator, and the excavator can rotate scraper bowl 4 in the transverse direction through power arm slewer in the work progress, need not to rotate whole excavator fuselage for it is very convenient to be under construction. The power arm slewing device comprises a driving arm 1 and a driven arm 2 which are connected, and a slewing motor 31 is arranged at one end part of the driving arm 1. One end of the driven arm 2 is provided with a driven rotating assembly, and the driven rotating assembly is connected with the driven rotating assembly through a rotary motor 31, so that one end of the driven arm 2 is rotatably connected with the driving arm 1. The other end of the follower arm 2 can be used for connecting a bucket 4. Under the driving of the rotary motor 31, the driven arm 2 rotates along the central axis of the driving arm 1, so that the bucket 4 rotates along the central axis of the driving arm 1, the angle of the bucket 4 in the transverse direction is adjusted, the operation in the transverse direction is convenient, and the operation is very convenient for some construction situations in which the angle of the bucket 4 in the transverse direction needs to be frequently adjusted.

As shown in fig. 1, 2 and 3, a turning motor 31 is detachably connected to one end of the driving arm 1, the turning motor 31 can be fixed to the driving arm 1 by screws, and when the turning motor 31 needs to be repaired or replaced, the turning motor 31 can be conveniently detached from the driving arm 1. The driven arm 2 is provided with a driven rotation assembly at an end portion close to the driving arm 1, the turning motor 31 is connected with one end portion of a driving shaft 34, and the other end portion of the driving shaft 34 is connected with the driven rotation assembly, so that the driving arm 1 and the driven arm 2 are connected. The rotary motor 31 may be connected to a control device through a wire or wirelessly, and the control device controls the rotary motor 31 to operate.

When the swing motor 31 works, the swing motor 31 drives the driven rotating assembly to rotate through the arranged driving shaft 34, so that the driven arm 2 rotates relative to the driving arm 1, and the bucket 4 arranged on the driven arm 2 rotates along with the driven arm 2, thereby achieving the purpose of adjusting the angle of the bucket 4 in the transverse direction without rotating the whole excavator body.

In some possible embodiments, the control device may be a terminal device such as a remote controller, or may be a fixed key, and the rotary motor 31 is operated by manually operating the key.

In some possible embodiments, the central axis of the driving arm 1 and the central axis of the driven arm 2 may be arranged on the same line. When the rotary motor 31 works, a plane formed by a rotating path of the driven arm 2 relative to the driving arm 1 is vertical to a central shaft of the driving arm 1, so that the driven arm 2 has small swing amplitude in the rotating process relative to the driving arm 1, and the driven arm 2 is not easy to damage.

In some possible embodiments, the driven rotating assembly includes a sleeve 32 and bearings for supporting the drive shaft 34 without interfering with rotation of the drive shaft 34. The bearing is arranged in the sleeve 32, the sleeve 32 is connected with the driving shaft 34 through the bearing, the driving shaft 34 penetrates through the inner ring of the bearing and is fixed, and the outer ring of the bearing is fixed on the inner side wall of the sleeve 32. When the rotary motor 31 rotates the drive shaft 34, the drive shaft 34 rotates the driven arm 2 through the bearing. The driven arm 2 is provided with a driven counter bore matched with the driving shaft 34 at the end part close to the driving shaft 34, and the driving shaft 34 is matched and connected with the driven counter bore in a plurality of ways. The end part of the driven arm 2 close to the driving arm 1 of the embodiment is provided with a polygonal slotted hole, preferably a regular pentagonal slotted hole; the drive shaft 34 selects a regular pentagonal prism that matches the regular pentagonal slot, and one end of the regular pentagonal prism is inserted into the regular pentagonal slot, and the other end is connected to the rotary motor 31. When the rotary motor 31 is operated, the regular pentagonal prism applies a force to the regular pentagonal slot hole to drive the driven arm 2 to rotate.

The rotary motor 31 is further provided with a bearing member 33, and is connected to the sleeve 32 through the bearing member 33. The sleeve 32 is wrapped in the bearing part 33, the bearing part 33 is wrapped in the rotary motor 31, a plurality of communicated screw holes are formed in the sleeve 32, the bearing part 33 and the rotary motor 31, the bearing part 33 and the sleeve 32 are sequentially screwed in through screws, so that the driving arm 1 and the driven arm 2 are connected.

During construction, a large amount of heavy objects may be contained in the bucket 4, and in addition to the weight of the follower arm 2 and the bucket 4, when the follower arm 2 is in a tilting state, the acting force between the sleeve 32 and the swing motor 31 is very large, so that the sleeve 32 is easily deformed, and the driving shaft 34 arranged in the sleeve 32 is easily deformed by the acting force of the sleeve 32, so that the rotation of the follower arm 2 is influenced. In order to avoid the above problem, the bearing member 33 is disposed between the sleeve 32 and the rotary motor 31, and when the driven arm 2 is in the inclined state, the acting force received by the sleeve 32 is transmitted to the bearing member 33, so as to avoid the driving shaft 34 from being easily deformed due to the direct contact between the sleeve 32 and the rotary motor 31, and thus avoid the driving shaft 34 from being scrapped.

In order to enable the rotary motor 31 to drive the driving shaft 34 to rotate more stably, a reduction gearbox can be arranged between the rotary motor 31 and the driving shaft 34, the rotary motor 31 is connected with the driving shaft 34 through the reduction gearbox, the action force sent by the rotary motor 31 can be greatly buffered through the buffering of the reduction gearbox, and finally the action force exerted on the driving shaft 34 is relatively stable, so that the driving shaft 34 stably drives the driven arm 2 to rotate, and the bucket 4 tends to be in a stable state in the process of adjusting the angle in the horizontal direction.

Example 2

As shown in fig. 4, the present embodiment provides an excavator, which includes the power arm swiveling device, and the excavator is further provided with a fixing arm 10, and the fixing arm 10 is used for adjusting the overall height of the power arm swiveling device. The fixed arm 10 is hinged to the middle position of the driving arm 1 through a hinged screw, the end part, away from the driven arm 2, of the driving arm 1 is hinged to a first driving cylinder 5, and the first driving cylinder 5 comprises a first sleeve 51 and a first telescopic rod 52. The first driving cylinder 5 is connected with a control device through an air pipe 13, and the control device can pressurize through the air pipe 13 to drive the first telescopic rod 52 to move in the first sleeve 51. The end of the first telescopic rod 52 far away from the first sleeve 51 is hinged with the end of the driving arm 1 far away from the driven arm 2 through a hinged screw. The driving arm 1 is hinged to the fixed arm 10 to form a lever, and the first telescopic rod 52 can apply a back-and-forth acting force to the driving arm 1 in the moving process, so that the driving arm 1 rotates relative to the fixed arm 10 by taking a central shaft of a hinged screw rod connecting the driving arm 1 and the fixed arm 10 as a rotating shaft. Therefore, the driving arm 1 is driven to rotate by the first driving cylinder 5, so that the angle of the whole power arm slewing device in the vertical direction is adjusted.

The excavator is connected with the bucket 4 through the follower arm 2, and the angle of the follower arm 2 in the lateral direction and the vertical direction is controlled by the swing motor 31 and the first driving cylinder 5, thereby adjusting the angle of the bucket 4 in the lateral direction and the vertical direction.

The end part of the driven arm 2 close to the driving arm 1 is provided with a first mounting part 14, the first mounting part 14 is composed of two flanges which are close to each other, and the two flanges are provided with through holes which are positioned on the same straight line. The end of the driven arm 2 remote from the driving arm 1 is provided with a second mounting portion 15, and the second mounting portion 15 is a hollow cylinder. A support column 8 is arranged between the first mounting part 14 and the second mounting part 15, and the support column 8 penetrates through the driven arm 2 and extends out of two sides of the driven arm 2 respectively. The first installation part 14 and the support column 8 are provided with driving mechanisms, the second installation part 15 is hinged with the bucket 4, and two end parts of the driving mechanisms are respectively hinged with the first installation part 14 and the bucket 4 to drive the bucket 4 to rotate along the hinged part with the second installation part 15.

Specifically, actuating mechanism includes that the second drives actuating cylinder 9, support frame 6 and follower 7, and the second drives actuating cylinder 9 and includes second sleeve pipe 91 and second telescopic link 92, and first installation department 14 is connected to second sleeve pipe 91 to through trachea 13 connection controlling means, controlling means can pass through trachea 13 pressurization, drive second telescopic link 92 and move in second sleeve pipe 91. The supporting frame 6 comprises a first supporting rod 61, a second supporting rod 62 and a connecting rod 63, one end parts of the first supporting rod 61 and the second supporting rod 62 are respectively hinged with two end parts of the supporting column 8, the other end parts of the first supporting rod 61 and the second supporting rod 62 are hinged with two end parts of the connecting rod 63, meanwhile, one end part of the driven piece 7 far away from the bucket 4 is fixedly connected, and the other end part of the driven piece 7 close to the bucket 4 is hinged with the bucket 4 through a hinge screw; the second mounting portion 15 is hingedly connected to the bucket 4 by a hinge screw. The second telescopic rod 92 is hinged to the connecting rod 63, and under the action of the control device, the second telescopic rod 92 is driven to move in the second sleeve 91, and the second telescopic rod 92 drives the connecting rod 63 to move and rotate along the central axis of the supporting column 8, so that the connecting rod 63 drives the bucket 4 to rotate along the hinged position of the bucket 4 and the second mounting portion 15 through the driven member 7. During the actual construction process of the bucket 4, the position of the bucket 4 relative to the material can be adjusted through the second driving cylinder 9, and the bucket 4 is further controlled more finely.

When the control device drives the rotary motor 31 to rotate the driven arm 2, the driven arm 2 is only driven to rotate back and forth, and the maximum rotation angle is 180 °. For example, when the driven arm 2 rotates clockwise by 180 °, it cannot rotate clockwise, but can rotate counterclockwise in the opposite direction, so as to avoid the air pipe 13 connected to the second driving cylinder 9 from being knotted or damaged.

In some possible embodiments, the control device of the excavator may include a first controller and a second controller, the first controller is connected to the swing motor 31 for controlling the swing motor 31 to rotate the driven arm 2 relative to the driving arm 1; to adjust the angle of the bucket 4 in the lateral direction. The second controller is connected with the first driving cylinder 5 and is used for controlling the first driving cylinder 5 to drive the driving arm 1 to rotate along the hinged position with the fixed arm 10, so that the angle of the bucket 4 in the vertical direction is adjusted. The first controller and the second controller may be keys mounted on an operation panel in the cab of the excavator, or may be keys on a separate remote controller. According to the actual construction situation, the angles of the bucket 4 in the transverse direction and the vertical direction are controlled to be suitable for construction.

The control device can also be provided with a third controller and a fourth controller, and the third controller can be connected with the second driving cylinder 9 and used for controlling the second driving cylinder 9 to drive the bucket 4 to rotate along the hinged position with the second mounting part 15, so that the position of the bucket 4 can be more finely adjusted when the bucket 4 is constructed. The fourth controller can be connected with the total driving cylinder and is used for controlling the total driving cylinder to drive the fixing arm 10 to ascend or descend so as to adjust the height of the bucket 4 arranged on the fixing arm 10.

In some possible embodiments, the two sides of the fixed arm 10 may be respectively connected to a main driving cylinder 11, the main driving cylinder 11 includes a main sleeve 111 and a main telescopic rod 112, the main telescopic rod 112 is hinged to the fixed arm 10, the main sleeve 111 is connected to a control device through an air pipe 13, and the control device may control the air pipe 13 to pressurize, so that the main telescopic rod 112 moves in the main sleeve 111 to adjust the height of the fixed arm 10 and the power arm rotating device and the bucket 4 provided on the fixed arm 10.

In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The above examples merely represent some embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. A power arm slewing device is characterized by comprising a driving arm and a driven arm which are connected, wherein one end part of the driving arm is detachably connected with a slewing motor, and one end part of the driven arm is provided with a driven rotating assembly; the rotary motor is connected with a driving shaft and drives the driven rotating assembly to rotate through the driving shaft so as to drive the driven arm to rotate relative to the driving arm.

2. The power arm swing according to claim 1, wherein a plane formed by a path along which the driven arm rotates with respect to the driving arm is perpendicular to a central axis of the driving arm when the swing motor is operated.

3. The power arm slewing device according to claim 1, wherein the driven rotation assembly comprises a sleeve and a bearing, the bearing is arranged in the sleeve, the sleeve is connected with the driving shaft through the bearing, a driven counter bore matched with the driving shaft is arranged at the end part, close to the driving arm, of the driven arm, and the driving shaft is connected with the driven counter bore in a matched mode; when the rotary motor works, the rotary motor applies acting force to the driven counter bore through the driving shaft so as to drive the driven arm to rotate.

4. The power arm swing device of claim 3, further comprising a bearing member disposed between the swing motor and the sleeve for preventing the sleeve from directly contacting the swing motor.

5. An excavator, comprising the power arm slewing device as claimed in any one of claims 1 to 4, wherein the power arm slewing device comprises a driving arm and a driven arm which are connected, a slewing motor is detachably connected to one end part of the driving arm, and a driven rotating assembly is arranged at one end part of the driven arm; the rotary motor is connected with a driving shaft and is connected with the driven rotating assembly through the driving shaft; when the rotary motor works, the rotary motor drives the driven rotating assembly to rotate through the driving shaft, so that the driven arm rotates relative to the driving arm.

6. The excavator of claim 5 wherein the center of the driving arm is hinged to a fixed arm, the end of the driving arm remote from the driven arm is connected to a first driving cylinder, and the first driving cylinder drives the driving arm to rotate relative to the fixed arm along the hinge with the fixed arm.

7. The excavator of claim 5, wherein a first installation part is arranged at the end part of the driven arm close to the driving arm, a second installation part is arranged at the end part of the driven arm far away from the driving arm, a support column is arranged between the first installation part and the second installation part, a driving mechanism is installed on the first installation part and the support column, a bucket is hinged to the second installation part, two end parts of the driving mechanism are respectively hinged to the first installation part and the bucket, and the driving mechanism drives the bucket to rotate along the hinged position of the bucket and the second installation part.

8. The excavator of claim 7 wherein the drive mechanism includes a second drive cylinder, a support bracket and a follower, the second drive cylinder being connected to one end of the follower via the support bracket, the other end of the follower being hingedly connected to the bucket; the second driving cylinder drives the bucket through the driven piece, so that the bucket rotates along the hinged position of the second installation part.

9. The excavator of claim 8 wherein the support frame comprises a first strut, a second strut and a connecting rod, one end of the first strut and one end of the second strut are respectively hinged to two ends of the support column, the other ends of the first strut and the second strut are both hinged to two ends of the connecting rod and are simultaneously fixedly connected to the end of the driven member away from the bucket;

the second drives the articulated connection of actuating cylinder the connecting rod to the drive the connecting rod along the center pin of support column rotates, thereby makes the connecting rod pass through the follower drives the scraper bowl along the scraper bowl with the articulated department of second installation department rotates.

10. The excavator of claim 6 further comprising a first controller and a second controller, wherein the first controller is connected to the swing motor for controlling the swing motor to rotate the driven arm relative to the driving arm; the second controller is connected with the first driving cylinder and used for controlling the first driving cylinder to drive the driving arm to rotate along the hinged position of the fixing arm.