CN108560624B

CN108560624B - Excavating arm and excavating equipment

Info

Publication number: CN108560624B
Application number: CN201810667758.9A
Authority: CN
Inventors: 薛璐; 冯国弟; 张红
Original assignee: Jiangsu XCMG Construction Machinery Institute Co Ltd
Current assignee: Jiangsu XCMG Construction Machinery Institute Co Ltd
Priority date: 2018-06-26
Filing date: 2018-06-26
Publication date: 2023-07-04
Anticipated expiration: 2038-06-26
Also published as: CN108560624A

Abstract

The invention relates to an excavating arm and excavating equipment, wherein the excavating arm comprises a bucket (1), an arm assembly and a movable arm (11), the arm assembly is connected between the bucket (1) and the movable arm (11), the movable arm (11) is also connected with a machine body of the excavating equipment, the arm assembly comprises an arm front arm (4) and a side-shifting driving mechanism, the side-shifting driving mechanism is connected between the arm front arm (4) and the movable arm (11) and is used for driving the arm front arm (4) to move laterally relative to the movable arm (11), and the arm front arm (4) and the movable arm (11) are kept parallel before and after movement. The excavating equipment includes an excavating arm. The side shifting range of the excavating arm and excavating equipment is larger, the side excavating performance is better, and the improvement cost is reduced.

Description

Excavating arm and excavating equipment

Technical Field

The invention relates to the technical field of earthmoving machinery, in particular to an excavating arm and excavating equipment.

Background

The backhoe loader is a small-sized multipurpose engineering machine, is widely applied to the fields of farmland water conservancy construction, municipal construction, highway maintenance, ports, oil fields and the like due to the characteristics of small operation space, strong maneuverability and the like, and is mainly used for excavation and backfilling of small earthworks such as foundation trenches, foundation pits, pipe ditches and the like. For excavating narrow spaces or side edges close to obstacles, such as when working conditions of foundation trenches are excavated at the sides of walls, the conventional excavating loader is difficult to efficiently complete.

According to the arrangement form of the excavating arm of the excavating loader, the excavating loader is mainly divided into a side-shifting excavating loader and a middle-set excavating loader. For the existing side-shifting type loader-digger, although side-shifting can be realized to a certain extent, the supporting legs are straight legs, the supporting width is generally similar to the width of a vehicle body, a side-shifting frame with the width approximately equal to the width of the vehicle body is arranged on the side-shifting type loader-digger, the digging arm slides relative to the side-shifting frame, the side-shifting range is limited in the width range of the side-shifting frame, and the side-shifting can not be shifted to an area beyond the width of the vehicle body; for the middle-mounted loader digger, the structure of the middle-mounted loader digger has no side shifting function, side excavation cannot be performed, operation can be performed only by adjusting a main machine and a rotation angle, operation is inconvenient, working efficiency is low, and even operation cannot be performed in a narrow space.

It should be noted that the information disclosed in the background section of the present invention is only for increasing the understanding of the general background of the present invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

The invention aims to provide an excavating arm and excavating equipment, which are used for realizing the function of excavating a side in a narrow space and enhancing the side excavating capacity of an excavating loader.

In order to achieve the above object, the present invention provides an excavating arm including a bucket, an arm assembly and a boom, the arm assembly being connected between the bucket and the boom, the boom being further connected with a body of an excavating equipment, the arm assembly comprising:

a boom forearm; and

and the side-shifting driving mechanism is connected between the bucket rod front arm and the movable arm and used for driving the bucket rod front arm to laterally move relative to the movable arm, and the bucket rod front arm and the movable arm are kept parallel before and after the movement.

Optionally, the stick assembly further includes:

and the bucket rod rear arm is connected between the side-shifting driving mechanism and the movable arm.

Optionally, the side-shift drive mechanism is manually adjustable.

Optionally, the side-shift driving mechanism includes:

a first arm middle arm connected between the left side of the arm front arm and the left side of the movable arm;

the second bucket rod middle arm is connected between the right side of the bucket rod front arm and the right side of the movable arm, is arranged in parallel with the first bucket rod middle arm and has the same length;

the loop bar assembly is connected between the connecting point of the first bucket rod middle arm and the bucket rod front arm and the connecting point of the second bucket rod middle arm and the movable arm, or between the connecting point of the first bucket rod middle arm and the movable arm and the connecting point of the second bucket rod middle arm and the bucket rod front arm; and

and the adjusting mechanism is used for adjusting the length of the loop bar assembly.

Optionally, the loop bar assembly comprises:

a sleeve; and

one end of the connecting rod is inserted into the sleeve, and the length of the connecting rod inserted into the sleeve is adjusted through the adjusting mechanism.

Optionally, the adjustment mechanism comprises:

the flange plate is provided with a first hole, sleeved on the periphery of the sleeve and in clearance fit with the sleeve; and

the positioning plate is provided with a second hole and is arranged on one side of the flange plate and fixedly connected with the flange plate so that the positioning plate, the flange plate and the sleeve are relatively fixed in the axial direction;

the connecting rod is inserted into the second hole and is connected with the positioning disc through threads.

Optionally, the flange is provided with a first boss extending radially inwards from the inner wall surface, and the sleeve is provided with a second boss extending radially outwards from the outer wall surface, the second boss being inserted in a cavity formed between the positioning plate and the first boss.

Optionally, the loop bar assembly further comprises a locking member for locking the connecting bar, preventing the connecting bar from moving relative to the sleeve.

Optionally, the excavating equipment further comprises a fixing bracket for fixing the side-shifting driving mechanism.

Optionally, the number of the fixing frames is multiple, and the specification of each fixing frame is different, so that different fixing frames can be replaced when the shape of the side-shifting driving mechanism is different.

In order to achieve the above object, the present invention also provides an excavating equipment including the excavating arm.

Optionally, the excavating equipment is an excavating loader.

Based on the technical scheme, the bucket rod assembly in the excavating arm embodiment of the invention comprises the bucket rod front arm and the lateral movement driving mechanism, wherein the lateral movement driving mechanism can drive the bucket rod front arm to laterally move relative to the movable arm so as to realize the lateral excavation function, and the lateral movement range is wider, and a lateral movement frame is not arranged, so that the width of the lateral movement frame is not limited; the front and back of the arm front arm moves laterally relative to the movable arm, and the arm front arm and the movable arm are always parallel, so that the bucket can be ensured to excavate on a vertical surface when excavating an area below the ground; and the side-shifting driving mechanism is used as a part of the bucket rod assembly, so that the improvement of the original loader-digger can be realized by replacing the bucket rod assembly and the bucket on the premise of not changing the structural form of the upper movable arm of the original loader-digger, thereby being beneficial to reducing the replacement of parts and saving the reconstruction cost.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

FIG. 1 is a schematic view of an embodiment of an excavating arm of the present invention.

Fig. 2 is a top view of one embodiment of the excavating arm of the present invention prior to lateral displacement.

FIG. 3 is a top view of one embodiment of the excavating arm of the present invention after side displacement.

Fig. 4 is a schematic view of a side-shifting drive mechanism in one embodiment of the excavating arm of the present invention.

In the figure:

1. a bucket; 2. a connecting rod; 3. a rocker; 4. a boom forearm; 5. a bucket hydraulic cylinder; 6. a loop bar assembly; 7. a fixing frame; 8. a first arm middle arm; 9. a second arm middle arm; 10. a bucket arm rear arm; 11. a movable arm; 12. a connecting rod; 13. a positioning plate; 14. a flange plate; 15. a sleeve; 16. a bolt; 17. a locking piece.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention.

In order to solve the problem of poor side excavating performance of an excavating loader in the prior art, the invention provides an excavating arm with an improved structure and excavating equipment with the excavating arm.

As shown in fig. 1, in an exemplary embodiment of the excavating arm provided by the present invention, the excavating arm includes a bucket 1, a boom assembly and a boom 11, the boom assembly being connected between the bucket 1 and the boom 11, the boom 11 also being connected to the body of the excavating equipment.

The bucket rod assembly comprises a bucket rod front arm 4 and a side-shifting driving mechanism, the side-shifting driving mechanism is connected between the bucket rod front arm 4 and the movable arm 11 and used for driving the bucket rod front arm 4 to laterally move relative to the movable arm 11, and the bucket rod front arm 4 and the movable arm 11 are kept parallel before and after movement, namely, the bucket rod front arm 4 is parallel to and laterally moves relative to the movable arm 11.

In the above-described exemplary embodiment, the arm assembly includes the arm forearm 4 and the side shift driving mechanism capable of driving the arm forearm 4 to laterally move with respect to the boom 11 to realize the side-cut function, the side shift range is wide without the side-cut frame, and thus is not limited to the width of the side-cut frame, and can be moved outside the vehicle body as needed, increasing the side-cut range, and improving the practicality of the excavating equipment.

In the prior art, there is an excavating and loading machine, although the side shifting of the bucket rod can be realized, when the bucket rod is laterally shifted, the movable arm and the bucket rod are not kept parallel, a certain angle is formed between the movable arm and the bucket rod, the structure is provided with the defects that when the excavating is carried out on the area below the ground, the connecting pin shaft between the movable arm and the deflection arm arranged between the movable arm and the bucket rod is deflected and is not perpendicular to the ground any more, at the moment, the bucket cannot carry out side excavating on the vertical surface due to the structural limitation of the movable arm and the bucket rod, the side excavating effect is seriously influenced, and the practicability is reduced. In the embodiment of the invention, the front and rear sides of the arm front arm 4 which moves laterally relative to the movable arm 11 are always parallel to the movable arm 11, and when the excavator excavates the area below the ground, even if the connecting pin shaft between the arm assembly and the movable arm 11 is deflected and is not perpendicular to the ground, the excavator bucket can excavate on the vertical surface, and the side excavating capacity is high.

The side-shifting driving mechanism is used as a part of the bucket rod assembly, and on the premise that the structural form of the original movable arm is not changed, the improvement of the original equipment can be realized by replacing the bucket rod assembly and the bucket, so that the replacement of parts is reduced, and the transformation cost is saved. Especially for the loader digger, the movable arm is generally of a straight arm structure, and the side-shifting driving mechanism is arranged in the bucket rod assembly, so that the whole transformation of the loader digger is facilitated, the structural transformation of the movable arm is avoided as much as possible, and the cost is saved.

In an alternative embodiment, the stick assembly further includes a stick rear arm 10, the stick rear arm 10 being connected between the side-shift drive mechanism and the boom 11. In this alternative embodiment, as shown in fig. 2 and 3, the arm rear arm 10 is connected to the boom 11, the arm front arm 4 is moved laterally with respect to the boom 11, specifically, the arm front arm 4 is moved laterally with respect to the arm rear arm 10, and the arm front arm 4 and the boom 11 remain parallel before and after the movement, specifically, the arm front arm 4 and the arm rear arm 10 remain parallel.

The specific configuration of the side-shifting drive mechanism may be selected in many ways as long as it is capable of driving the arm front arm 4 to move laterally relative to the boom 11.

Optionally, the side-shift drive mechanism is manually adjustable.

As a specific embodiment of the side-shift drive mechanism, the side-shift drive mechanism includes a first arm-in-arm 8, a second arm-in-arm 9, a loop bar assembly 6, and an adjustment mechanism, wherein the first arm-in-arm 8 is connected between the left side of the arm forearm 4 and the left side of the boom 11, the second arm-in-arm 9 is connected between the right side of the arm forearm 4 and the right side of the boom 11, the loop bar assembly 6 is connected between the connection point of the first arm-in-arm 8 with the arm forearm 4 and the connection point of the second arm-in-arm 9 with the boom 11, or between the connection point of the first arm-in-arm 8 with the boom 11 and the connection point of the second arm-in-arm 9 with the arm forearm 4, and the adjustment mechanism is used for adjusting the length of the loop bar assembly 6.

In the above-described embodiment, the first arm 8 and the second arm 9 are parallel to each other and have the same length, and therefore the first arm 8, the second arm 9, the connection portion between the left side of the arm front arm 4 and the right side of the arm front arm 4, and the connection portion between the left side of the boom 11 and the right side of the boom 11 constitute a parallelogram structure, the boom assembly 6 is connected at a diagonal position of the parallelogram, and the shape of the parallelogram can be changed by adjusting the length of the boom assembly 6, so that the arm front arm 4 is laterally moved with respect to the boom 11.

Further, the loop bar assembly 6 includes a sleeve 15 and a connection bar 12, one end of the connection bar 12 is inserted into the sleeve 15, and the length of the connection bar 12 inserted into the sleeve 15 is adjusted by an adjusting mechanism.

Optionally, the adjusting mechanism includes a flange 14 and a positioning plate 13, where the flange 14 is provided with a first hole, the flange 14 is sleeved on the outer periphery of the sleeve 15 and is in clearance fit with the sleeve 15, and the flange 14 can rotate relative to the sleeve 15. The positioning plate 13 is provided with a second hole, and the second hole is arranged on one side of the flange plate 14 and fixedly connected with the flange plate 14, so that the positioning plate 13, the flange plate 14 and the sleeve 15 are relatively fixed in the axial direction, when the positioning plate 13 and the flange plate 14 are rotated, the positioning plate 13 and the flange plate 14 do not relatively move in the axial direction of the sleeve 15, and the connecting rod 12 is inserted into the second hole and is in threaded connection with the positioning plate 13, so that the connecting rod 12 can be screwed into or screwed out of the sleeve 15 when the positioning plate 13 and the flange plate 14 are rotated, and the length adjustment of the loop bar assembly 6 is realized.

Compared with a driving mechanism such as an oil cylinder or an air cylinder, the side-shifting driving mechanism in the embodiment of the invention has the advantages that the additional weight is smaller, the influence on the whole gravity center of the excavating arm, especially the bucket rod assembly is smaller, the gravity center deviation can not be caused basically under the condition of not shifting, the whole stress of the excavating arm is uniform, the uneven stress caused by arranging the oil cylinder with larger weight on the side surface of the excavating arm can be avoided, and the operation stability and the service life of each part are prevented from being influenced.

In order to achieve a relative axial fixation of the positioning disk 13 and the flange 14 with the sleeve 15, the flange 14 is provided with a first boss extending radially inwards from the inner wall surface, and the sleeve 15 is provided with a second boss extending radially outwards from the outer wall surface, which is inserted in a cavity formed between the positioning disk 13 and the first boss. The first boss and the second boss are in side contact to block the flange 14 from moving axially relative to the sleeve 15, and the positioning plate 13 is fixedly connected with the flange 14, so that the positioning plate 13 does not move axially relative to the sleeve 15.

Optionally, the positioning plate 13 is connected and fixed to the flange plate 14 by bolts 16.

Optionally, the loop bar assembly 6 further comprises a locking member 17 for locking the connecting bar 12, preventing the connecting bar 12 from moving relative to the sleeve 15. After the relative position of the connecting rod 12 and the sleeve 15 is adjusted, the connecting rod 12 can be prevented from accidentally moving relative to the sleeve 15 in the working process of the excavating equipment by locking the locking piece 17, so that the working safety is improved.

Optionally, the locking member 17 is a locking nut, and is sleeved on the connecting rod 12 to lock the connecting rod 12.

Optionally, the excavating arm further comprises a fixing bracket 7 for fixing the side-shifting drive mechanism. Through setting up mount 7, can be after the shape of side shift actuating mechanism is fixed, fix parallelogram's shape, further strengthen the overall rigidity of dipper subassembly, improve structural stability, avoid the potential safety hazard.

Alternatively, the number of the holders 7 is plural, and the specification of each holder 7 is different to replace different holders 7 when the shape of the side shift driving mechanism is different.

Based on the excavating arm, the invention further provides excavating equipment, which comprises the excavating arm.

Optionally, the excavating equipment is an excavating loader. In addition to backhoe loaders, the backhoe arm described above may be used with other work machines requiring lateral movement.

The positive technical effects of the excavating arm in the above embodiments are also applicable to excavating equipment, and are not described herein.

The specific construction and operation of one embodiment of the excavating arm and excavating equipment of the present invention will be described in detail with reference to fig. 1 through 4:

as shown in fig. 1, the excavating arm includes a bucket 1, an arm assembly, and a boom 11. The stick assembly includes a stick front arm 4, a side-shift drive mechanism, and a stick rear arm 10. The arm rear arm 10 is hinged with the movable arm 11, and the movable arm 11 is hinged with the machine body.

The bucket 1 is hinged with the bucket arm forearm 4, the bucket arm forearm 4 is hinged with the rocker 3, a connecting rod 2 is arranged between the rocker 3 and the bucket 1, one end of the connecting rod 2 is hinged with the rocker 3, and the other end is hinged with the bucket 1. The bucket arm forearm 4 is provided with an ear plate, and the bucket arm forearm 4 is hinged with the bucket hydraulic cylinder 5 through the ear plate. The bucket 1 can be driven to perform an excavating motion with respect to the arm forearm 4 by the bucket cylinder 5.

The side-shifting drive mechanism includes a first arm 8, a second arm 9, a loop bar assembly 6, and an adjustment mechanism. The cross-sectional shapes of the first arm middle arm 8 and the second arm middle arm 9 are I-shaped. One end of the first arm 8 is hinged to the left side of the arm front arm 4, and the other end is hinged to the left side of the arm rear arm 10. One end of the second arm 9 is hinged to the right side of the arm front arm 4, and the other end is hinged to the right side of the arm rear arm 10. Arm 4, arm rear arm 10, arm 8 in the first arm and arm 9 in the second arm are articulated to each other to form a movable parallelogram structure.

As shown in fig. 4, the loop bar assembly 6 includes a connection bar 12 and a sleeve 15, one end of the connection bar 12 is inserted into the sleeve 15, and the other end is located outside the sleeve 15. The end of the connecting rod 12 remote from the sleeve 15 is hinged to the hinge point of the second arm middle arm 9 and the arm front arm 4, and the end of the sleeve 15 remote from the connecting rod 12 is hinged to the hinge point of the first arm middle arm 8 and the arm rear arm 10.

The adjusting mechanism comprises a positioning plate 13 and a flange plate 14, an inward first boss is arranged on the flange plate 14, an outward second boss is arranged on a sleeve 15, the first boss and the second boss are mutually crossed and tightly attached, and the positioning plate 13 and the flange plate 14 are fixedly connected through bolts 16. The connecting rod 12 is connected with the positioning disk 13 through threads, and a locking piece 17 is arranged on the connecting rod 12.

The excavating arm further comprises a fixing frame 7, wherein the fixing frame 7 is of an X-shaped structure and is hinged with four pin shafts of the first bucket rod middle arm 8 and the second bucket rod middle arm 9, and the fixing frame 7 is used for fixing a parallelogram structure formed by the bucket rod front arm 4, the first bucket rod middle arm 8, the second bucket rod middle arm 9 and the bucket rod rear arm 10, so that structural rigidity is enhanced. The fixed frame 7 is not used when the excavating load is small, and the loop bar assembly 6 bears the load. According to the usual lateral displacement of the excavating arm, a series of holders 7 with different specifications can be made.

In operation, rotation of the positioning disk 13 causes the connecting rod 12 to move axially relative to the sleeve 15 to adjust the length of the sleeve rod assembly 6. After the length of the loop bar assembly 6 is adjusted, the shape of the parallelogram structure changes, so that the arm front arm 4 is driven to move laterally in parallel relative to the arm rear arm 10. After the arm front arm 4 moves to the preset position, the locking piece 17 is rotated towards the direction approaching the positioning disc 13, so that the locking piece is attached to the end face of the sleeve 15 for locking, and locking is completed. In addition, a suitable fixing frame 7 can be selected to fix the parallelogram structure.

By way of illustration of various embodiments of the excavating arm and excavating equipment of the present invention, it can be seen that the excavating arm and excavating equipment embodiments of the present invention have at least one or more of the following advantages:

1. the side shifting range is larger, the side shifting range is not limited by the width of the side shifting frame, the side shifting frame can extend out of the machine body according to the requirement, the problem that the conventional loader-digger is difficult to dig a side foundation trench in a narrow space is solved, and the application range of the loader-digger is further improved;

2. the side-shifting driving mechanism is arranged on the bucket rod, so that the structure improvement is reduced, and the improvement cost is saved;

3. the front arm of the side shifting front and rear bucket rod is parallel to the rear arm of the bucket rod and the movable arm, so that the side excavating performance is improved;

4. the manual-adjustable lateral shifting driving mechanism is used for replacing an oil cylinder or an air cylinder, the structure is simpler, the cost is lower, the gravity center of the excavating arm can be prevented from shifting under the condition that lateral shifting does not occur, the stress of the excavating arm is more uniform, and the operation stability and the service life of the excavating arm are improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.

Claims

1. An excavating arm comprising a bucket (1), an arm assembly and a boom (11), the arm assembly being connected between the bucket (1) and the boom (11), the boom (11) being further connected with the body of an excavating equipment, characterized in that the arm assembly comprises:

a boom forearm (4); and

the side-shifting driving mechanism is connected between the bucket rod front arm (4) and the movable arm (11) and used for driving the bucket rod front arm (4) to laterally move relative to the movable arm (11), and the bucket rod front arm (4) and the movable arm (11) are kept parallel before and after movement, and the side-shifting driving mechanism comprises a sleeve rod assembly (6) and an adjusting mechanism, wherein the adjusting mechanism is used for adjusting the length of the sleeve rod assembly (6);

the loop bar assembly (6) comprises a sleeve (15) and a connecting rod (12), one end of the connecting rod (12) is inserted into the sleeve (15), and the length of the connecting rod (12) inserted into the sleeve (15) is adjusted through the adjusting mechanism;

the adjusting mechanism comprises a flange plate (14) and a positioning plate (13), wherein the flange plate (14) is provided with a first hole, the periphery of the sleeve (15) is sleeved with the sleeve (15) in a clearance fit manner, the positioning plate (13) is provided with a second hole, one side of the flange plate (14) is fixedly connected with the flange plate (14), the positioning plate (13) and the flange plate (14) are relatively fixed with the sleeve (15) in the axial direction, and the connecting rod (12) is inserted into the second hole and is in threaded connection with the positioning plate (13).

2. The excavating arm according to claim 1, wherein the stick assembly further comprises:

and an arm rear arm (10) connected between the side shift driving mechanism and the boom (11).

3. The excavating arm according to claim 1 wherein said side-shifting drive mechanism is manually adjustable.

4. The excavating arm according to claim 1 wherein said side-shifting drive mechanism further comprises:

a boom rear arm (10) connected between the side-shift drive mechanism and the boom (11);

a first arm center arm (8) connected between the left side of the arm front arm (4) and the left side of the boom (11); and

a second arm middle arm (9) connected between the right side of the arm front arm (4) and the right side of the movable arm (11), arranged in parallel with the first arm middle arm (8) and having the same length;

wherein, the loop bar assembly (6) is connected between the connecting point of the first arm middle arm (8) and the arm front arm (4) and the connecting point of the second arm middle arm (9) and the movable arm (11), or between the connecting point of the first arm middle arm (8) and the movable arm (11) and the connecting point of the second arm middle arm (9) and the arm front arm (4).

5. An excavating arm according to claim 1 wherein the flange (14) is provided with a first boss extending radially inwardly from the inner wall surface and the sleeve (15) is provided with a second boss extending radially outwardly from the outer wall surface, the second boss being interposed in a cavity formed between the locating disc (13) and the first boss.

6. The excavating arm according to claim 1, wherein the loop bar assembly (6) further comprises a locking member (17) for locking the connecting bar (12) preventing the connecting bar (12) from moving relative to the sleeve (15).

7. The excavating arm according to claim 1, further comprising a mount (7) for securing said side-shifting drive mechanism.

8. The excavating arm according to claim 7 wherein the number of holders (7) is plural and each holder (7) is of different gauge to change different holders (7) when the shape of the side shift drive mechanism is different.

9. An excavating equipment comprising an excavating arm according to any one of claims 1 to 8.

10. The excavating equipment according to claim 9 wherein the excavating equipment is an excavating loader.